21 Received signal measurements

3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS

For evaluating the reception quality (the basis for handover and power control) the following two criteria are used:

– signal strength (RXLEV);

– signal quality (RXQUAL).

Unless otherwise specified all tests in clauses 21.1 to 21.4 are applicable for all MSs supporting the bands referred to in clause 1.

21.1 Signal strength

21.1.1 Definition

The MS reports RXLEV values related to the apparent received RF signal strength. It is necessary for these levels to attain sufficient accuracy for the correct functioning of the system.

21.1.2 Conformance requirement

1. The RMS received signal level at the receiver input shall be measured by the MS over the full range of ‑110 dBm to ‑48 dBm with a relative accuracy between signals with levels up to 20 dB difference according to table 21‑1

1.1 under normal conditions, 3GPP TS 05.08, subclause 8.1.2 and 3GPP TS 05.05, subclause 6.2.

1.2 under extreme conditions, 3GPP TS 05.08, subclause 8.1.2, 3GPP TS 05.05, subclauses D.1 and D.2.

Table 21-1: Tolerance for relative accuracy of receive signal measurement

Absolute level of lower level signal
dBm

Tolerance
dB

GSM
Small MS

GSM
Other MS

DCS 1800
Class 1&2

DCS 1800
Class 3

PCS 1900
Class 1&2

PCS 1900
Other MS

Lower limit
Single Multi

Upper limit
Single Multi

 -88
 -101
< -101

 -90
 -103
< -103

 -86
 -99
< -99

 -88
 -101
< -101

 -88
 -101
< -101

 -90
 -103
< -103

2 4
3 5
4 6

2 4
2 5
2 6

Single means that the measurements are on the same or different RF channel within the same frequency band.

Multi means that the measurements are on different RF channel on different frequency bands.

For measurements between ARFCN in different bands the ‘Absolute level of lower level signal’ column for the band including the lower level signal shall be used to determine which tolerance applies.

At extreme temperature conditions an extra 2 dB shall be added to the Multi limits in above table.

2. The RMS received signal level at the receiver input shall be measured with an absolute accuracy of ±4 dB from ‑110 dBm to ‑70 dBm under normal conditions; 3GPP TS 05.08, subclause 8.1.2.

3. The RMS received signal level at the receiver input shall be measured with an absolute accuracy of ±6 dB over the full range of ‑110 dBm to ‑48 dBm under both normal and extreme conditions; 3GPP TS 05.08, subclause 8.1.2.

4. If the received signal level falls below the reference sensitivity level for the type of MS then the MS shall report a level between the reference sensitivity level and the actual received level, but with the tolerances given in conformance requirements 2. and 3. above.

5. The measured signal level shall be mapped to an RXLEV value between 0 and 63 as specified in 3GPP TS 05.08, subclause 8.1.4.

21.1.3 Test purpose

1. To verify that the RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N reported by the MS does not exceed conformance requirement 1.

1.1 under normal conditions;

1.2 under extreme conditions.

2. To verify that the RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N reported by the MS does not exceed conformance requirement 2 under normal conditions.

3. To verify that the RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N reported by the MS does not exceed conformance requirement 3 under extreme conditions and under normal conditions from ‑48 dBm to ‑70 dBm.

4. To verify that the RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N reported by the MS does not exceed conformance requirement 4.

NOTE: Conformance requirement 5 is inherently tested in each of the test purposes 1. to 4.

21.1.4 Method of test

21.1.4.1 Initial conditions

The SS is set to produce the BCCH of the serving cell at 63 dBVemf( ) and the BCCHs of 6 surrounding cells at 28 dBVemf(  ). The BCCH of the serving cell indicates these BCCHs, but not the BCCH of the serving cell. The ARFCN of the serving cell BCCH is chosen so as not to interfere with the other channels as shown in table 21-2. The fading profile for the BCCHs of the serving and surrounding cells will be set to static.

For circuit switch capable devices, after 30 s, a call is set up according to the generic call set up procedure to an ARFCN, within the supported band of operation. The SACCH indicates the same surrounding cell BCCHs as the BCCH of the serving cell.

For GPRS only devices, the Ready Timer (T3314) is indicated as disabled in the GMM ATTACH ACCEPT message. After 30s, a GPRS mode RLC unacknowledged mode downlink TBF is established on a single slot. Following TBF establishment, the SS transmits a PACKET MEASUREMENT ORDER message on downlink PACCH addressing the MS which sets the NETWORK_CONTROL_ORDER to ‘1’ and indicates the value NC_REPORTING_PERIOD_T = 0.480ms. The PACKET MEASUREMENT ORDER does not modify the broadcast allocation list as indicated on the BCCH of the serving cell. Throughout the downlink TBF, the SS transmits two consecutive downlink RLC data blocks to the MS with the S/P bit set to ‘1’ in the RLC/MAC header at least twice every 480ms. The PDTCH level is reported by the MS via the RXLEV_SERVING_CELL parameter and the neighbour cell BCCH levels are reported by the MS via the RXLEV_N parameters in the PACKET MEASUREMENT REPORT messages received on uplink PACCH.

NOTE: The 30 s is to allow the MS to scan and find all BCCHs.

Specific PICS statements:

– MS supporting packet switched services only (TSPC_operation_mode_C)

21.1.4.2 Procedure

a) The levels of the TCH / PDTCH and BCCHs are set according to table 21-2 step 1. The SS waits 20 s before continuing.

Table 21-2: Signal levels at receiver input in dBVemf(  )

ARFCN

TCH / PDTCH

BCCH1

BCCH2

BCCH3

BCCH4

BCCH5

BCCH6

Step

GSM 450

259

276

293

264

269

281

288

GSM 480

306

323

340

311

316

328

335

GSM 900:

1

62

124

20

40

80

100

DCS 1 800

512

700

885

585

660

790

835

PCS 1 900

512

700

805

585

660

790

550

450/900

259

124

276

293

269

288

1

480/900

306

124

323

340

316

335

1

450/1 800

259

885

276

293

269

288

512

480/1 800

306

885

323

340

316

335

512

900/1 800

1

885

62

124

40

100

512

450/900/1 800

259

124

276

885

293

1

512

480/900/1 800

306

124

323

885

340

1

512

GSM 850

128

189

251

150

170

210

230

GSM 710

438

475

511

440

455

485

500

T-GSM 810

438

475

511

440

455

485

500

GSM 750

438

475

511

440

455

485

500

750/850

438

251

475

511

455

485

128

1 + m  21

64,5 – m  10

64,5 – m  10

64,5 – m  10

64,5 – m  10

64,5 – m  10

64,5 – m  10

64,5 – m  10

2 + m  21

54,5 – m  10

63,5 – m  10

54,5 – m  10

54,5 – m  10

54,5 – m  10

54,5 – m  10

54,5 – m  10

3 + m  21

54,5 – m  10

62,5 – m  10

44,5 – m  10

44,5 – m  10

44,5 – m  10

44,5 – m  10

44,5 – m  10

.

.

.

.

.

.

44,5 – m  10

44,5 – m  10

17 + m  21

54,5 – m  10

.

.

.

.

44,5 – m  10

44,5 – m  10

18 + m  21

44,5 -m  10

.

.

.

.

44,5 – m  10

44,5 – m  10

.

.

.

.

.

.

44,5 – m  10

44,5 – m  10

21 + m  21

44,5 – m  10

44,5 – m  10

44,5 – m  10

44,5 – m  10

44,5 – m  10

44,5 – m  10

44,5 – m  10

m = 0, 1, 2, 3, 4.

b) The measurement is done in 105 steps. The initial signal levels of the TCH / PDTCH of the serving cell and the BCCHs of the surrounding cells are adjusted according to table 21-2. At each step the SS keeps the signal levels stable for one reporting period, except at steps 21 + m  21 where the level is held stable for 1,75 reporting periods. The RXLEV value for the period in which the change occurs (reported in the following period) is discarded. The SS records the RXLEV values reported for the surrounding cell BCCHs in steps 1 + m  21 and 21 + m  21. The RXLEV values for BCCH 1 are recorded by the SS for all 105 steps.

NOTE: This extension at steps 21 + m  21 is to allow an extra quarter reporting period for the MS to stabilize for steps 1 + m  21.

For circuit switched speech calls at steps 1 to 30 the SS simulates a base station with DTX off and at steps 31 to 105 the SS simulates a base station with DTX on. At step 64, within every 480 ms reporting period, out of the 4 SACCH and 8 SID timeslots the SS transmits the first six active timeslots of the TCH with signal level 39,5 dBVemf(  ) and the last six active timeslots of the TCH with signal level 29,5 dBVemf(  ). At steps 1 to 30 the SS checks the accuracy of the measured signal strength of TCH by checking the values of the parameters RXLEV_FULL and RXLEV_SUB. At steps 31 to 105 the SS shall check only the value of the parameter RXLEV_SUB.

For circuit switched data calls and signalling only connection the SS simulates a base station with DTX off for step 1 to 105. At steps 1 to 105 the SS checks the accuracy of the measured signal strength of TCH by checking the values of the parameters RXLEV_FULL and RXLEV_SUB.

For GPRS only devices at steps 1 to 105 the SS checks the accuracy of the measured signal strength of the PDTCH by checking the value of the parameter RXLEV_SERVING_CELL received in the PACKET MEASUREMENT REPORT messages from the MS.

c) Step b) is repeated under extreme conditions (annex 1, TC2,2 and TC3).

21.1.5 Test requirements

21.1.5.1 Relative accuracy of measurements on different ARFCN

For normal and each of the 4 extreme conditions tested the following applies:

a) For each of the steps 1, 21, 22, 42, 43 and 64, of the 7 reported RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N values checked, the difference between the minimum reported RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N value and the maximum reported RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N value shall be no more than 4 if the measurements are on the same or on different RF channel within the same frequency band and no more than 8 (12 for extreme temperature conditions) if the measurements are on different frequency bands.

b) For each of the steps 63 and 85, of the 7 reported RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N values checked, the difference between the minimum reported RXLEV value and the maximum reported RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N value shall be no more than 5 for small MS, DCS 1 800 and PCS 1 900 (Class 1 and 2) MS or 4 for other MS if the measurements are on the same or on different RF channel within the same frequency band and no more than 9 for small MS, DCS 1 800 and PCS 1 900 (Class 1 and 2) MS or 8 for other MS and other PCS 1 900 MS (13 and 12 for extreme temperature conditions) if the measurements are on different frequency bands.

c) For step 84, of the 7 reported RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N values checked, the difference between the minimum reported RXLEV value and the maximum reported RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N value shall be no more than 5 if the measurements are on the same or on different RF channel within the same frequency band and no more than 9 (13 for extreme temperature conditions) if the measurements are on different frequency bands.

d) For step 105, of the reported RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N values checked, the difference between the minimum reported RXLEV value and the maximum reported RXLEV value shall be no more than 6 if the measurements are on the same or on different RF channel within the same frequency band and no more than 10 (14 for extreme temperature conditions) if the measurements are on different frequency bands.

NOTE: It is not mandatory for the MS to report any of the BCCHs in step 105.

21.1.5.2 Relative accuracy at a single frequency (BCCH1)

For normal and each of the 4 extreme conditions tested the following applies:

For: n <= 21 and RXLEV1 / RXLEV_N1 = 63

RXLEVn / RXLEV_N1 – (63 – n + r) shall be between:

‑2 and +2

NOTE 1: This formula allows for an MS with an absolute accuracy worse than +0,5 dB and therefore reporting an RXLEV / RXLEV_N of 63 for more than one step. The formula checks the relative accuracy from the lowest input level for which the MS last reports RXLEV / RXLEV_N of 63.

Otherwise:

RXLEV (m*21+1) / RXLEV_N(m*21+1) – RXLEV (m*21+n) / RXLEV_N(m*21+n)– n + 1 shall be between:

‑2 and +2

for steps 2 to 62 and 65 to 71 for DCS 1 800 class 1/2 MS; or steps 2 to 62 and 65 to 73 for DCS 1 800 class 3, PCS 1 900 (Class 1&2) and Small GSM MS; or 2 to 75 for other MS and other PCS 1 900 MS.

‑3 and +2

for steps 63 and 72 to 96 for DCS 1 800 class 1/2 MS; or steps 63 and 74 to 98 for DCS 1 800 class 3, PCS 1 900 (Class 1 and 2) and Small GSM MS; or

76 to 100 for other MS and other PCS 1 900 MS.

‑4 and +2

for steps 97 to 105 for DCS 1 800 class 1/2 MS; or steps 99 to 105 for DCS 1 800 class 3, PCS 1 900 (Class 1 and 2) and Small GSM MS; or 101 to 105 for other MS and other PCS 1 900 MS.

where: 1 < n  21 and 0  m  4 as identified in table 21‑2, and r is the number of the last step where RXLEV / RXLEV_N of 63 was reported.

NOTE 2: It is not mandatory for the MS to report BCCH1 for steps greater than 99 for GSM 400, GSM 700, GSM 850, T_GSM 810 or GSM 900 Small MS or 101 for other GSM and other PCS 1 900 MS or 97 for a DCS 1 800 Class 1 or Class 2 MS and 99 for DCS 1 800 Class 3 and PCS 1 900 (Class 1 and 2) MS. If the MS reports a level and the upper limit for this step in the above formula implies a level below the reference sensitivity level for the type of MS, then the upper limit shall be considered as equal to a value corresponding to the reference sensitivity level.

21.1.5.3 Absolute accuracy

For each BCCH reported, |RXLEVMS + m  10 – 62|/ |RXLEV_NMS + m  10 – 62| shall be no more than:

4 for steps 64 and 85 under normal conditions.

6 for steps 64 and 85 under extreme conditions.

6 for steps 1, 22 and 43 under normal and extreme conditions.

where: 0  m  4 as identified in table 21‑2.

21.2 Signal strength selectivity

21.2.1 Definition

The signal strength selectivity is a measure of the ability of the signal strength measuring part of the MS to discriminate against RF power from adjacent ARFCN. The RXLEV selectivity figure corresponds to the amount by which the adjacent channel power shall be attenuated.

21.2.2 Conformance requirement

The selectivity of the received signal measurement shall be as follows:

– for adjacent (200 kHz) channel;  16 dB;

– for adjacent (400 kHz) channel;  48 dB;

– for adjacent (600 kHz) channel;  56 dB.

3GPP TS 05.08, subclause 8.1.2.

21.2.3 Test purpose

To verify that the MS meets the conformance requirement at the 200 kHz adjacent channel above and below the wanted.

21.2.4 Method of test

21.2.4.1 Initial conditions

For GSM 450:

For circuit switch capable devices, a call is set up according to the generic call set up procedure on ARFCN 269 and with surrounding cell BCCH3 indicated in the BA list at ARFCN 281.

For GPRS only devices, the Ready Timer (T3314) is indicated as disabled in the GMM ATTACH ACCEPT message. A GPRS mode RLC unacknowledged mode downlink TBF is established on a single slot on ARFCN 269. Following TBF establishment, the SS transmits a PACKET MEASUREMENT ORDER message on downlink PACCH addressing the MS which sets the NETWORK_CONTROL_ORDER to ‘1’ and indicates the value NC_REPORTING_PERIOD_T = 0.480ms. The PACKET MEASUREMENT ORDER does not modify the broadcast allocation list as indicated on the BCCH of the serving cell in which BCCH3 is indicated at ARFCN 281. Throughout the downlink TBF, the SS transmits two consecutive downlink RLC data blocks to the MS with the S/P bit set to ‘1’ in the RLC/MAC header at least twice every 480ms. The PDTCH level is reported by the MS via the RXLEV_SERVING_CELL parameter and the neighbour cell BCCH levels are reported by the MS via the RXLEV_N parameters in the PACKET MEASUREMENT REPORT messages received on uplink PACCH.

The RF level of the TCH / PDTCH and BCCH3 is set to 20 dB above reference sensitivity level.

BCCH1 and 2 at ARFCN 270 and 280 are off.

These conditions are kept for 30 s to ensure the MS has time to decode the BCCH.

For GSM 480:

For circuit switch capable devices, a call is set up according to the generic call set up procedure on ARFCN 316 and with surrounding cell BCCH3 indicated in the BA list at ARFCN 328.

For GPRS only devices, the Ready Timer (T3314) is indicated as disabled in the GMM ATTACH ACCEPT message. A GPRS mode RLC unacknowledged mode downlink TBF is established on a single slot on ARFCN 316. Following TBF establishment, the SS transmits a PACKET MEASUREMENT ORDER message on downlink PACCH addressing the MS which sets the NETWORK_CONTROL_ORDER to ‘1’ and indicates the value NC_REPORTING_PERIOD_T = 0.480ms. The PACKET MEASUREMENT ORDER does not modify the broadcast allocation list as indicated on the BCCH of the serving cell in which BCCH3 is indicated at ARFCN 328. Throughout the downlink TBF, the SS transmits two consecutive downlink RLC data blocks to the MS with the S/P bit set to ‘1’ in the RLC/MAC header at least twice every 480ms. The PDTCH level is reported by the MS via the RXLEV_SERVING_CELL parameter and the neighbour cell BCCH levels are reported by the MS via the RXLEV_N parameters in the PACKET MEASUREMENT REPORT messages received on uplink PACCH.

The RF level of the TCH / PDTCH and BCCH3 is set to 20 dB above reference sensitivity level.

BCCH1 and 2 at ARFCN 317 and 327 are off.

These conditions are kept for 30 s to ensure the MS has time to decode the BCCH.

For GSM 710, GSM 750, T-GSM 810:

For circuit switch capable devices, a call is set up according to the generic call set up procedure on ARFCN 450 and with surrounding cell BCCH3 indicated in the BA list at ARFCN 485.

For GPRS only devices, the Ready Timer (T3314) is indicated as disabled in the GMM ATTACH ACCEPT message. A GPRS mode RLC unacknowledged mode downlink TBF is established on a single slot on ARFCN 450. Following TBF establishment, the SS transmits a PACKET MEASUREMENT ORDER message on downlink PACCH addressing the MS which sets the NETWORK_CONTROL_ORDER to ‘1’ and indicates the value NC_REPORTING_PERIOD_T = 0.480ms. The PACKET MEASUREMENT ORDER does not modify the broadcast allocation list as indicated on the BCCH of the serving cell in which BCCH3 is indicated at ARFCN 485. Throughout the downlink TBF, the SS transmits two consecutive downlink RLC data blocks to the MS with the S/P bit set to ‘1’ in the RLC/MAC header at least twice every 480ms. The PDTCH level is reported by the MS via the RXLEV_SERVING_CELL parameter and the neighbour cell BCCH levels are reported by the MS via the RXLEV_N parameters in the PACKET MEASUREMENT REPORT messages received on uplink PACCH.

The RF level of the TCH / PDTCH and BCCH3 is set to 20 dB above reference sensitivity level.

BCCH1 and 2 at ARFCN 451 and 484 are off.

These conditions are kept for 30 s to ensure the MS has time to decode the BCCH.

For GSM 850:

For circuit switch capable devices, a call is set up according to the generic call set up procedure on ARFCN 170 and with surrounding cell BCCH3 indicated in the BA list at ARFCN 210.

For GPRS only devices, the Ready Timer (T3314) is indicated as disabled in the GMM ATTACH ACCEPT message. A GPRS mode RLC unacknowledged mode downlink TBF is established on a single slot on ARFCN 170. Following TBF establishment, the SS transmits a PACKET MEASUREMENT ORDER message on downlink PACCH addressing the MS which sets the NETWORK_CONTROL_ORDER to ‘1’ and indicates the value NC_REPORTING_PERIOD_T = 0.480ms. The PACKET MEASUREMENT ORDER does not modify the broadcast allocation list as indicated on the BCCH of the serving cell in which BCCH3 is indicated at ARFCN 210. Throughout the downlink TBF, the SS transmits two consecutive downlink RLC data blocks to the MS with the S/P bit set to ‘1’ in the RLC/MAC header at least twice every 480ms. The PDTCH level is reported by the MS via the RXLEV_SERVING_CELL parameter and the neighbour cell BCCH levels are reported by the MS via the RXLEV_N parameters in the PACKET MEASUREMENT REPORT messages received on uplink PACCH.

The RF level of the TCH/ PDTCH and BCCH3 is set to 20 dB above reference sensitivity level.

BCCH1 and 2 at ARFCN 171 and 209 are off.

These conditions are kept for 30 s to ensure the MS has time to decode the BCCH.

For GSM 900:

For circuit switch capable devices, a call is set up according to the generic call set up procedure on ARFCN 40 and with surrounding cell BCCH3 indicated in the BA list at ARFCN 80.

For GPRS only devices, the Ready Timer (T3314) is indicated as disabled in the GMM ATTACH ACCEPT message. A GPRS mode RLC unacknowledged mode downlink TBF is established on a single slot on ARFCN 40. Following TBF establishment, the SS transmits a PACKET MEASUREMENT ORDER message on downlink PACCH addressing the MS which sets the NETWORK_CONTROL_ORDER to ‘1’ and indicates the value NC_REPORTING_PERIOD_T = 0.480ms. The PACKET MEASUREMENT ORDER does not modify the broadcast allocation list as indicated on the BCCH of the serving cell in which BCCH3 is indicated at ARFCN 80. Throughout the downlink TBF, the SS transmits two consecutive downlink RLC data blocks to the MS with the S/P bit set to ‘1’ in the RLC/MAC header at least twice every 480ms. The PDTCH level is reported by the MS via the RXLEV_SERVING_CELL parameter and the neighbour cell BCCH levels are reported by the MS via the RXLEV_N parameters in the PACKET MEASUREMENT REPORT messages received on uplink PACCH.

The RF level of the TCH/ PDTCH and BCCH3 is set to 20 dB above reference sensitivity level.

BCCH1 and 2 at ARFCN 41 and 79 are off.

These conditions are kept for 30 s to ensure the MS has time to decode the BCCH.

For DCS 1 800 and PCS 1 900:

For circuit switch capable devices, a call is set up according to the generic call set up procedure on ARFCN 690 and with surrounding cell BCCH3 indicated in the BA list at ARFCN 790.

For GPRS only devices, the Ready Timer (T3314) is indicated as disabled in the GMM ATTACH ACCEPT message. A GPRS mode RLC unacknowledged mode downlink TBF is established on a single slot on ARFCN 690. Following TBF establishment, the SS transmits a PACKET MEASUREMENT ORDER message on downlink PACCH addressing the MS which sets the NETWORK_CONTROL_ORDER to ‘1’ and indicates the value NC_REPORTING_PERIOD_T = 0.480ms. The PACKET MEASUREMENT ORDER does not modify the broadcast allocation list as indicated on the BCCH of the serving cell in which BCCH3 is indicated at ARFCN 790. Throughout the downlink TBF, the SS transmits two consecutive downlink RLC data blocks to the MS with the S/P bit set to ‘1’ in the RLC/MAC header at least twice every 480ms. The PDTCH level is reported by the MS via the RXLEV_SERVING_CELL parameter and the neighbour cell BCCH levels are reported by the MS via the RXLEV_N parameters in the PACKET MEASUREMENT REPORT messages received on uplink PACCH.

The RF level of the TCH/ PDTCH and BCCH3 is set to 20 dB above reference sensitivity level.

BCCH1 and 2 at ARFCN 691 and 789 are off.

These conditions are kept for 30 s to ensure the MS has time to decode the BCCH.

Specific PICS statements:

– MS supporting packet switched services only (TSPC_operation_mode_C)

21.2.4.2 Procedure

a) The SS records the RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N values reported for the TCH / PDTCH and BCCH3

b) BCCH1 and 2 are set to 9 dB above the signal level of the TCH / PDTCH and BCCH3

NOTE: The first adjacent channel interference requirement limits the level of BCCHs 1 and 2 to 9 dB. This ensures that the MS can maintain the call, and read BCCH3.

c) These conditions are kept for 30 s.

d) The SS records the RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N values reported for the TCH / PDTCH and BCCH3.

21.2.5 Test requirements

The values of RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N recorded in step d) shall be no more than 1 above the values recorded in step a).

NOTE: This one change in the reported value of RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N is calculated as follows: The level of the first adjacent interfering signal is such that C/I is -9 dB. With an RXLEV selectivity for the first adjacent channel of 16 dB, the power from the adjacent channel is equal to -7 dB with respect to the power level of the useful signal. The increase in power therefore is equal to 10log(1 + 10-0,7) = 0,71 dB. Thus, the value of RXLEV (or RXLEV_SERVING_CELL) / RXLEV_N could increase by 1.

21.3 Signal quality under static conditions

In order to have a testing performance corresponding to that in clause 14 for high error rates, the multiplication factor of the tested error rate with respect to the specified error rate have been increased. The following figures have been used (static propagation conditions):

Specified error rate

Multiplication factor

min. Max-events

 25 %

1,22

200

30 – 40 %

1,15

300

> 40 %

1,1

400

21.3.1 Signal quality under static conditions – TCH/FS no DTX

21.3.1.1 Definition

The MS must be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS has to map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. The error assessment is based on 104 TDMA frames: RXQUAL_FULL.

21.3.1.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. When the quality is assessed over the full-set of frames, eight levels of RXQUAL are defined and shall be mapped to the equivalent BER before channel decoding as per the table in 3GPP TS 05.08, subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe; 3GPP TS 05.08, subclause 8.2.3.

21.3.1.3 Test purpose

1. To verify, under static propagation conditions, that the received signal quality is measured and mapped to the eight levels of RXQUAL_FULL by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. The probability that the correct RXQUAL band is reported shall meet the values given in as per the table in 3GPP TS 05.08, subclause 8.2.4.

2. To verify that the reported parameters (RXQUAL) are the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.3.1.4 Method of test

21.3.1.4.1 Initial conditions

A call is set up by the SS according to the generic call set up procedure on a full rate speech channel in the mid ARFCN range. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Full rate

The SS commands the MS to establish the TCH burst-by-burst loop (C), see subclause 36.

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with static propagation characteristics. The wanted signal is the standard test signal C1. It is at the nominal frequency of the receiver and its level is 28 dBVemf(-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot on a nominal frequency 200 kHz above the nominal frequency of the wanted signal.

21.3.1.4.2 Procedure

a) The SS sets the level of the unwanted signal at a value for which the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4 is covered by one of the cases 1 to 13 of table 21.3.1.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.3.1.5). The SS shall take 10 samples.

c) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

d) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating steps (b) and (c) until case 14 is reached.

e) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.

f) Steps b) through e) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 3300 (minimum total events(200)/minimum test limit(0.061)).

g) The SS removes the unwanted signal and releases the call.

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

*3NOTE: When testing RXQUAL_SUB , on a full rate speech channel, the MS has approximately twice as many bits as the SS to assess BER. The MS has both SID and SACCH bits, whereas the SS only has the looped back SID bits. Therefore it is only tested that the MS uses the correct frames for RXQUAL_SUB reporting by checking both RXQUAL_SUB and RXQUAL_FULL reports. No quantitative assessment is done.

Maximum Duration of Test

40 minutes.

21.3.1.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail

Table 21.3.1.5: Test criteria and limits for RXQUAL_FULL errors for TCH/FS

Case

(i)

BER estimated by MS/SS (all applicable bursts)

(%)

Expected

RXQUAL

(RXQUAL_)

Test limit
DTX Off

(%)

0

<0.1

0

12.2

1

>=0.1, <0.26

0, 1

30.5

2

>=0.26, <0.3

1

30.5

3

>=0.3, <0.51

1, 2

30.5

4

>=0.51, <0.64

2

18.3

5

>=0.64, <1.0

2,3

18.3

6

>=1.0, <1.3

3

12.2

7

>=1.3, <1.9

3, 4

12.2

8

>=1.9, <2.7

4

12.2

9

>=2.7, <3.8

4, 5

12.2

10

>=3.8, <5.4

5

6.1

11

>=5.4, <7.6

5, 6

6.1

12

>=7.6, <11.0

6

6.1

13

>=11.0, <15.0

6, 7

6.1

14

>=15.0

7

6.1

21.3.2 Signal quality under static conditions – TCH/HS

21.3.2.1 Definition

The MS shall be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS shall map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. For the half rate channel without downlink DTX, the error assessment is based on 52 TDMA frames: RXQUAL_FULL. In case downlink DTX is used, the assessment is based on 12 TDMA frames: RXQUAL_SUB.

21.3.2.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. When the quality is assessed over the full-set and sub-set of frames, eight levels of RXQUAL are defined and shall be mapped to the equivalent BER before channel decoding as per the table in 3GPP TS 05.08, subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe; 3GPP TS 05.08, subclause 8.2.3.

21.3.2.3 Test purpose

1. To verify, under static propagation conditions, that the received signal quality is measured and mapped to the eight levels of RXQUAL_FULL by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. The probability that the correct RXQUAL band is reported shall meet the values given as per the table in 3GPP TS 05.08, subclause 8.2.4.

2. To verify that the reported parameters (RXQUAL) are the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.3.2.4 Method of test

21.3.2.4.1 Initial conditions

A call is set up by the SS according to the generic call set up procedure on a half rate speech channel in the mid ARFCN range. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Half rate

The SS commands the MS to establish the TCH burst-by-burst loop (loop C), see subclause 36.

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with static propagation characteristics. The wanted signal is the standard test signal C1. It is at the nominal frequency of the receiver and its level is 28 dBVemf (-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot on a nominal frequency 200 kHz above the nominal frequency of the wanted signal.

The SS sets downlink DTX off.

21.3.2.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.3.2.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.3.2.5). The SS shall take 10 samples.

c) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

d) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating step (b) until case 14 is reached.

e) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) until case 0 is reached.

f) Steps d) and e) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 3300.

g) The SS releases the call

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

Maximum Duration of Test

40 minutes.

21.3.2.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.3.2.5: Test criteria and limits for RXQUAL_FULL for TCH/AHS

Case

(i)

BER estimated by MS/SS (all applicable bursts)

(%)

Expected RXQUAL

(RXQUAL_)

Test limit
DTX Off

(%)

0

<0.1

0

12.2

1

>=0.1, <0.26

0, 1

46

2

>=0.26, <0.3

1

46

3

>=0.3, <0.51

1, 2

46

4

>=0.51, <0.64

2

34.5

5

>=0.64, <1.0

2,3

34.5

6

>=1.0, <1.3

3

18.3

7

>=1.3, <1.9

3, 4

18.3

8

>=1.9, <2.7

4

18.3

9

>=2.7, <3.8

4, 5

18.3

10

>=3.8, <5.4

5

6.1

11

>=5.4, <7.6

5, 6

6.1

12

>=7.6, <11.0

6

6.1

13

>=11.0, <15.0

6, 7

6.1

14

>=15.0

7

6.1

21.3.3 Signal quality under static conditions – TCH/AFS – DTX off

21.3.3.1 Definition

The MS must be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS has to map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. For the full rate channel without downlink DTX, the error assessment is based on 104 TDMA frames: RXQUAL_FULL.

21.3.3.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. When the quality is assessed over the full-set and sub-set of frames, eight levels of RXQUAL are defined and shall be mapped to the equivalent BER before channel decoding as per the table in 3GPP TS 05.08, subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe; 3GPP TS 05.08, subclause 8.2.3.

21.3.3.3 Test purpose

1. To verify, under static propagation conditions, that the received signal quality is measured and mapped to the eight levels of RXQUAL_FULL by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. The probability that the correct RXQUAL band is reported shall meet the values given by the table in 3GPP TS 05.08, subclause 8.2.4.

2. To verify that the reported parameters (RXQUAL) are the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.3.3.4 Method of test

21.3.3.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a TCH/AFS with an ARFCN in the Mid ARFCN range, power control level set to maximum power. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Full rate

The multirate configuration indicates the use of the following set of codecs modes:

Codec Mode

TCH/AFS in kbit/s

CODEC_MODE_4

12,2

CODEC_MODE_3

7,95

CODEC_MODE_2

5,9

CODEC_MODE_1

4,75

The Initial Codec Mode shall be set to the lowest codec mode (CODEC_MODE_1).

The SS sends a CMC and CMI corresponding to the lowest codec mode (CODEC_MODE_1).

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with static propagation characteristics. The SS transmits the wanted signal (Standard Test Signal C1) on the traffic channel at the nominal frequency of the receiver and its level is nominally 28 dBVemf (-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot on a nominal frequency 200 kHz above the nominal frequency of the wanted signal.

The SS commands the MS to establish the TCH burst-by-burst loop, see subclause 36.

21.3.3.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.3.3.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.3.3.5). The SS shall take 10 samples.

c) When sumi=0..14(sample counter(i)) = 800 the CMI shall be changed to indicate CODEC_MODE_2, at 1600 CMI = CODEC_MODE_3, and at 2400 CMI = CODEC_MODE_4.

d) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

e) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating steps (b) and (c) until case 14 is reached.

f) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.

g) Steps d) and e) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 3300.

h) The SS releases the call

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

Maximum Duration of Test

40 minutes.

21.3.3.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.3.3.5: Test criteria and limits for RXQUAL_FULL for TCH/AFS

Case

(i)

BER estimated by MS/SS (all applicable bursts)

(%)

Expected RXQUAL

(RXQUAL_)

Test limit
DTX Off

(%)

0

<0.1

0

12.2

1

>=0.1, <0.26

0, 1

30.5

2

>=0.26, <0.3

1

30.5

3

>=0.3, <0.51

1, 2

30.5

4

>=0.51, <0.64

2

18.3

5

>=0.64, <1.0

2,3

18.3

6

>=1.0, <1.3

3

12.2

7

>=1.3, <1.9

3, 4

12.2

8

>=1.9, <2.7

4

12.2

9

>=2.7, <3.8

4, 5

12.2

10

>=3.8, <5.4

5

6.1

11

>=5.4, <7.6

5, 6

6.1

12

>=7.6, <11.0

6

6.1

13

>=11.0, <15.0

6, 7

6.1

14

>=15.0

7

6.1

21.3.4 Signal quality under static conditions – TCH/AHS – DTX Off

21.3.4.1 Definition

The MS shall be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS shall map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. For the half rate channel without downlink DTX, the error assessment is based on 52 TDMA frames: RXQUAL_FULL.

21.3.4.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. When the quality is assessed over the full-set and sub-set of frames, eight levels of RXQUAL are defined and shall be mapped to the equivalent BER before channel decoding as per the table in 3GPP TS 05.08, subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe; 3GPP TS 05.08, subclause 8.2.3.

21.3.4.3 Test purpose

1. To verify, under static propagation conditions, that the received signal quality is measured and mapped to the eight levels of RXQUAL_FULL by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. The probability that the correct RXQUAL band is reported shall meet the values given by the table in 3GPP TS 05.08, subclause 8.2.4.

2. To verify that the reported parameters (RXQUAL) are the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.3.4.4 Method of test

21.3.4.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a TCH/AHS with an ARFCN in the Mid ARFCN range, power control level set to maximum power. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Half rate

The multirate configuration indicates the use of the following set of codecs modes:

Codec Mode

TCH/AHS in kbit/s

CODEC_MODE_3

7.95

CODEC_MODE_2

6.7

CODEC_MODE_1

4,75

The Initial Codec mode (ICM) shall be set to the lowest codec mode (CODEC_MODE_1).

The SS continuously sends a CMC corresponding to the lowest codec mode (CODEC_MODE_1).

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with static propagation characteristics. The SS transmits the wanted signal (Standard Test Signal C1 on the traffic channel using the Initial Codec Mode (ICM) at the nominal frequency of the receiver and its level is 28 dBVemf (-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot on a nominal frequency 200 kHz above the nominal frequency of the wanted signal.

The SS commands the MS to establish the TCH burst-by-burst loop, see subclause 36.

The SS sets downlink DTX off.

21.3.4.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.3.4.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.3.4.5). The SS shall take 10 samples.

c) When sumi=0..14(sample counter(i)) = 1100 the CMI shall be changed to indicate CODEC_MODE_2, at 2200 CMI = CODEC_MODE_3.

d) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

e) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating steps (b) and (c) until case 14 is reached.

f) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.

g) Steps d) and e) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 3300.

h) The SS releases the call

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

Maximum Duration of Test

40 minutes.

21.3.4.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.3.4.5: Test criteria and limits for RXQUAL_FULL for TCH/AHS

Case

(i)

BER estimated by MS/SS (all applicable bursts)

(%)

Expected RXQUAL

(RXQUAL_)

Test limit
DTX Off

(%)

0

<0.1

0

12.2

1

>=0.1, <0.26

0, 1

46

2

>=0.26, <0.3

1

46

3

>=0.3, <0.51

1, 2

46

4

>=0.51, <0.64

2

34.5

5

>=0.64, <1.0

2,3

34.5

6

>=1.0, <1.3

3

18.3

7

>=1.3, <1.9

3, 4

18.3

8

>=1.9, <2.7

4

18.3

9

>=2.7, <3.8

4, 5

18.3

10

>=3.8, <5.4

5

6.1

11

>=5.4, <7.6

5, 6

6.1

12

>=7.6, <11.0

6

6.1

13

>=11.0, <15.0

6, 7

6.1

14

>=15.0

7

6.1

21.3.5 Signal quality under static conditions – TCH/AFS – DTX on

21.3.5.1 Definition

The MS must be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS has to map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. In case downlink DTX is used, the assessment is based on a subset of TDMA frames containing SID_UPDATE frames and SACCH frames: RXQUAL_SUB. On TCH/AFS and TCH/AHS, there is no fixed subset of TDMA frames that will always be transmitted during DTX, however a SID_UPDATE will be transmitted every 8 speech frames. A detection algorithm is required in the receiver which informs about whether a SID_UPDATE (see 3GPP TS 05.03 and 3GPP TS 06.93) frame was transmitted (and thus can be used for quality and signal level estimation) or not.

21.3.5.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. When the quality is assessed over the full-set and sub-set of frames, eight levels of RXQUAL are defined and shall be mapped to the equivalent BER before channel decoding as per the table in 3GPP TS 05.08, subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe; 3GPP TS 05.08, subclause 8.2.3.

21.3.5.3 Test purpose

1. To verify that, for downlink DTX, the reported parameter RXQUAL_SUB is the received signal quality, averaged over the correct frames (SID_UPDATE and SACCH), mapped by the MS to the eight levels RXQUAL scale in a manner that can be related to an equivalent average BER before channel decoding assessed over the reporting period of one SACCH multiframe. The probability that the correct RXQUAL band is reported shall meet the values given by the table in 3GPP TS 05.08, subclause 8.2.4.

2. To verify that the reported parameters (RXQUAL) are the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.3.5.4 Method of test

21.3.5.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a TCH/AFS with an ARFCN in the Mid ARFCN range, power control level set to maximum power. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Full rate

The multirate configuration indicates the use of the following set of codecs modes:

Codec Mode

TCH/AFS in kbit/s

CODEC_MODE_4

12,2

CODEC_MODE_3

7,95

CODEC_MODE_2

5,9

CODEC_MODE_1

4,75

The Initial Codec Mode shall be arbitrarilyset to one of the codec modes of the codec set. *3

The SS sends a CMC and CMI corresponding to the initial codec mode selection.

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with static propagation characteristics. The SS transmits the wanted signal (Standard Test Signal C1) on the traffic channel at the nominal frequency of the receiver and its level is nominally 28 dBVemf (-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot on a nominal frequency 200 kHz above the nominal frequency of the wanted signal.

The SS commands the MS to establish the TCH burst-by-burst loop, see subclause 36.

The SS sets downlink DTX on.

21.3.5.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.3.5.5.

  1. The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.3.5.5). The SS shall take 10 samples.
  2. If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2
  3. The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 14 is reached.
  4. The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.
  5. Steps c) and d) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 1100.

g) The SS releases the call

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

*3 NOTE: Using varying codec modes does not improve the test depth because the channel coding of the SID_UPDATE frames are identical for all codec modes. (TS 3GPP 45.003).

Maximum Duration of Test

15 minutes.

21.3.5.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.3.5.5: Test criteria and limits for RXQUAL_SUB for TCH/AFS

Case

(i)

BER measured by SS (12 of 16 bursts)

(%)

Assumed BER estimated by MS (16 of 16 bursts)

(%)

Expected

RXQUAL

(RXQUAL_)

Test limit

(%)

0

<0.05

<0.11

0,

40.25

1

>=0.05, <0.2

>=0.055, <0.256

0, 1

71.5

2

>=0.2, <0.4

>=0.164, <0.475

0, 1, 2

71.5

3

>=0.4, <0.5

>=0.329, <0.548

1, 2

71.5

4

>=0.5, <0.8

>=0.384, <0.914

1, 2, 3

71.5

5

>=0.8, <0.9

>=0.603, <1.096

2, 3

60.5

6

>=0.9, <1.5

>=0.713, <1.827

2, 3, 4

60.5

7

>=1.5, <1.8

>=1.151, <2.193

3, 4

60.5

8

>=1.8, <3.0

>=1.371, <3.746

3, 4, 5

60.5

9

>=3.0, <3.6

>=2.303, <4.477

4, 5

46

10

>=3.6, <6.0

>=2.741, <7.493

4, 5, 6

46

11

>=6.0, <7.3

>=4.550, <9.046

5, 6

34.5

12

>=7.3, <12.1

>=5.482, <15.077

5, 6, 7

34.5

13

>=12.1, <24.15

>=9.101, <30.154

6, 7

24.4

14

>=24.15

>=18.147

7

18.3

21.3.6 Signal quality under static conditions – TCH/AHS – DTX On

21.3.6.1 Definition

The MS must be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS has to map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. In case downlink DTX is used, the assessment is based on a subset of TDMA frames containing SID_UPDATE frames and SACCH frames: RXQUAL_SUB. On TCH/AHS, there is no fixed subset of TDMA frames that will always be transmitted during DTX, however a SID_UPDATE will be transmitted every 8 speech frames. A detection algorithm is required in the receiver that informs about whether a SID_UPDATE (see 3GPP TS 05.03 and 3GPP TS 06.93) frame was transmitted (and thus can be used for quality and signal level estimation) or not.

21.3.6.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of one SACCH multiframe. When the quality is assessed over the full-set and sub-set of frames, eight levels of RXQUAL are defined and shall be mapped to the equivalent BER before channel decoding as per the table in 3GPP TS 05.08, subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe; 3GPP TS 05.08, subclause 8.2.3.

21.3.6.3 Test purpose

1. To verify that, for downlink DTX, the reported parameter RXQUAL_SUB is the received signal quality, averaged over the correct frames (SID_UPDATE and SACCH), mapped by the MS to the eight levels RXQUAL scale in a manner that can be related to an equivalent average BER before channel decoding assessed over the reporting period of one SACCH multiframe. The probability that the correct RXQUAL band is reported shall meet the values given by the table in 3GPP TS 05.08, subclause 8.2.4.

2. To verify that the reported parameters (RXQUAL) are the received signal quality averaged over the reporting period of length one SACCH multiframe.

21.3.6.4 Method of test

21.3.6.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a TCH/AHS with an ARFCN in the Mid ARFCN range, power control level set to maximum power. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Half rate

The multirate configuration indicates the use of the following set of codecs modes:

Codec Mode

TCH/AHS in kbit/s

CODEC_MODE_3

7.95

CODEC_MODE_2

6.7

CODEC_MODE_1

4,75

The Initial Codec Mode shall be arbitrarily set to one of the codec modes of the codec set. *3

The SS sends a CMC and CMI corresponding to the initial codec mode selection.

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with static propagation characteristics. The SS transmits the wanted signal (Standard Test Signal C1) on the traffic channel at the nominal frequency of the receiver and its level is nominally 28 dBVemf (-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot on a nominal frequency 200 kHz above the nominal frequency of the wanted signal.

The SS commands the MS to establish the TCH burst-by-burst loop, see subclause 36.

The SS sets downlink DTX on.

21.3.6.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.3.6.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.3.6.5). The SS shall take 10 samples.

c) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

d) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 14 is reached.

e) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.

f) Steps c) and d) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 1200.

g) The SS releases the call

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

*3 NOTE: Using varying codec modes does not improve the test depth because the channel coding of the SID_UPDATE frames are identical for all codec modes. (TS 3GPP 45.003).

Maximum Duration of Test

17 minutes.

21.3.6.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.3.6.5: Test criteria and limits for RXQUAL_SUB for TCH/AHS

Case

(i)

BER measured by SS (12 of 16 bursts)

(%)

Assumed BER estimated by MS (16 of 16 bursts)

(%)

Expected

RXQUAL

(RXQUAL_)

Test limit

(%)

0

<0.05

<0.11

0,

40.25

1

>=0.05, <0.2

>=0.055, <0.256

0, 1

71.5

2

>=0.2, <0.4

>=0.164, <0.475

0, 1, 2

71.5

3

>=0.4, <0.5

>=0.329, <0.548

1, 2

71.5

4

>=0.5, <0.8

>=0.384, <0.914

1, 2, 3

71.5

5

>=0.8, <0.9

>=0.603, <1.096

2, 3

60.5

6

>=0.9, <1.5

>=0.713, <1.827

2, 3, 4

60.5

7

>=1.5, <1.8

>=1.151, <2.193

3, 4

60.5

8

>=1.8, <3.0

>=1.371, <3.746

3, 4, 5

60.5

9

>=3.0, <3.6

>=2.303, <4.477

4, 5

46

10

>=3.6, <6.0

>=2.741, <7.493

4, 5, 6

46

11

>=6.0, <7.3

>=4.550, <9.046

5, 6

34.5

12

>=7.3, <12.1

>=5.482, <15.077

5, 6, 7

34.5

13

>=12.1, <24.15

>=9.101, <30.154

6, 7

24.4

14

>=24.15

>=18.147

7

18.3

21.4 Signal quality under TUhigh propagation conditions

In order to have a testing performance corresponding to that in clause 14 for high error rates, the multiplication factor of the tested error rate with respect to the specified error rate have been increased. The following figures have been used (TUHigh propagation conditions):

Specified error rate

Multiplication factor

min. Max-events

 25 %

1,22

200

30 – 40 %

1,15

300

> 40 %

1,1

400

21.4.1 Signal quality under TUhigh propagation conditions – TCH/FS

21.4.1.1 Definition

The MS must be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS has to map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. For the full rate channel without downlink DTX, the error assessment is based on 104 TDMA frames: RXQUAL_FULL.

21.4.1.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of 1 SACCH multiframe. The assessed equivalent BER before channel decoding shall be mapped to the eight levels of RXQUAL using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08 subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe.

3GPP TS 05.08, subclause 8.2.3.

21.4.1.3 Test purpose

1. To verify, under TUhigh conditions, that the received signal quality is measured and reported to the eight levels of RXQUAL_FULL by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of length one SACCH multiframe for the TCH/FS. The probability that the correct RXQUAL band is reported shall meet the values given as per the table in 3GPP TS 05.08 subclause 8.2.

2. To verify that the reported parameters (RXQUAL) is the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.4.1.4 Method of test

21.4.1.4.1 Initial conditions

The SS sets up a call according to the generic call set up procedure on a full rate speech channel in the mid ARFCN range. The RADIO_LINK_TIMEOUT parameter is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Full rate

The SS commands the MS to establish the TCH burst-by-burst loop (C), see subclause 36.

The SS produces the standard test signal C1, with TUhigh propagation profile. It shall be at the nominal frequency of the receiver at a level of 28 dBVemf (-85 dBm).

The SS also generates an independent, uncorrelated interfering (unwanted) signal with TUhigh propagation profile. The unwanted signal is the standard test signal I1, on the same timeslot and same ARFCN of the wanted signal.

21.4.1.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BERof the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.4.1.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.4.1.5). The SS shall take 10 samples.

c) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

d) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating steps (b) and (c) until case 14 is reached.

e) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.

f) Steps b) through e) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 1650 (minimum total events(200)/minimum test limit(0.122)).

g) The SS removes the unwanted signal and releases the call.

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

Maximum Duration of Test

14 minutes.

21.4.1.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.4.1.5: Test criteria and limits for RXQUAL FULL errors for TCH/FS

Case

(i)

BER estimated by MS/SS (all applicable bursts)

(%)

Expected

RXQUAL

(RXQUAL_)

Test limit

0

<0.1

0, 1

18.3

1

>=0.1, <0.26

0, 1, 2

18.3

2

>=0.26, <0.3

0, 1, 2

18.3

3

>=0.3, <0.51

0, 1, 2, 3

18.3

4

>=0.51, <0.64

1, 2, 3

18.3

5

>=0.64, <1.0

1, 2, 3, 4

30.5

6

>=1.0, <1.3

2, 3, 4

30.5

7

>=1.3, <1.9

2, 3, 4, 5

30.5

8

>=1.9, <2.7

3, 4, 5

30.5

9

>=2.7, <3.8

3, 4, 5, 6

30.5

10

>=3.8, <5.4

4, 5, 6

12.2

11

>=5.4, <7.6

4, 5, 6, 7

12.2

12

>=7.6, <11.0

5, 6, 7

12.2

13

>=11.0, <15.0

5, 6, 7

12.2

14

>=15.0

6, 7

12.2

21.4.2 Signal quality under TUhigh propagation conditions – TCH/AFS

21.4.2.1 Definition

The MS shall be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS shall map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. For the full rate channel without downlink DTX, the error assessment is based on 104 TDMA frames: RXQUAL_FULL.

21.4.2.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of 1 SACCH multiframe. The assessed equivalent BER before channel decoding shall be mapped to the eight levels of RXQUAL using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08 subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe; 3GPP TS 05.08, subclause 8.2.3.

21.4.2.3 Test purpose

1. To verify, under TUhigh conditions, that the received signal quality is measured and reported to the eight levels of RXQUAL_FULL by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of length one SACCH multiframe for the TCH/AFS. The probability that the correct RXQUAL band is reported shall meet the values given by the table in 3GPP TS 05.08 subclause 8.2.

2. To verify that the reported parameters (RXQUAL) is the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.4.2.4 Method of test

21.4.2.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a TCH/AFS with an ARFCN in the Mid ARFCN range, power control level set to maximum power. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Full rate

The multirate configuration indicates the use of the following set of codecs modes:

Codec Mode

TCH/AFS in kbit/s

CODEC_MODE_4

12,2

CODEC_MODE_3

7,95

CODEC_MODE_2

5,9

CODEC_MODE_1

4,75

The Initial Codec Mode shall be set to the lowest codec mode (CODEC_MODE_1).

The SS sends a CMC and CMI corresponding to the lowest codec mode (CODEC_MODE_1).

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with TUhigh propagation characteristics. The SS transmits the wanted signal (Standard Test Signal C1) on the traffic channel, with TUhigh propagation profile, at the nominal frequency of the receiver at a level of 28 dBVemf (-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot and on same ARFCN of the wanted signal.

The SS commands the MS to establish the TCH burst-by-burst loop (C), see subclause 36.

21.4.2.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.4.2.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.4.2.5). The SS shall take 10 samples.

c) When sumi=0..14(sample counter(i)) = 400 the CMI shall be changed to indicate CODEC_MODE_2, at 800 CMI = CODEC_MODE_3, and at 1200 CMI = CODEC_MODE_4.

d) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

e) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating steps (b) and (c) until case 14 is reached.

f) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.

g) Steps d) and e) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 1650.

h) The SS releases the call.

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

Maximum Duration of Test

14 minutes.

21.4.2.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.4.2.5: Test criteria and limits for RXQUAL FULL errors for TCH/AFS

Case

(i)

BER estimated by MS/SS (all applicable bursts)

(%)

Expected

RXQUAL

(RXQUAL_)

Test limit

0

<0.1

0, 1

18.3

1

>=0.1, <0.26

0, 1, 2

18.3

2

>=0.26, <0.3

0, 1, 2

18.3

3

>=0.3, <0.51

0, 1, 2, 3

18.3

4

>=0.51, <0.64

1, 2, 3

18.3

5

>=0.64, <1.0

1, 2, 3, 4

30.5

6

>=1.0, <1.3

2, 3, 4

30.5

7

>=1.3, <1.9

2, 3, 4, 5

30.5

8

>=1.9, <2.7

3, 4, 5

30.5

9

>=2.7, <3.8

3, 4, 5, 6

30.5

10

>=3.8, <5.4

4, 5, 6

12.2

11

>=5.4, <7.6

4, 5, 6, 7

12.2

12

>=7.6, <11.0

5, 6, 7

12.2

13

>=11.0, <15.0

5, 6, 7

12.2

14

>=15.0

6, 7

12.2

21.4.3 Signal quality under TUhigh propagation conditions – TCH/AHS

21.4.3.1 Definition

The MS shall be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS shall map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. For the half rate channel without downlink DTX, the error assessment is based on 52 TDMA frames: RXQUAL_FULL.

21.4.3.2 Conformance requirement

1. The received signal quality shall be measured by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of 1 SACCH multiframe. The assessed equivalent BER before channel decoding shall be mapped to the eight levels of RXQUAL using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08 subclauses 8.2.2 and 8.2.4.

2. The reported parameters (RXQUAL) shall be the received signal quality, averaged over the reporting period of length one SACCH multiframe; 3GPP TS 05.08, subclause 8.2.3.

21.4.3.3 Test purpose

1. To verify, under TUhigh conditions, that the received signal quality is measured and reported to the eight levels of RXQUAL_FULL by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of length one SACCH multiframe for the TCH/AHS. The probability that the correct RXQUAL band is reported shall meet the values given by the table in 3GPP TS 05.08 subclause 8.2.

2. To verify that the reported parameters (RXQUAL) is the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.4.3.4 Method of test

21.4.3.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a TCH/AHS with in the Mid ARFCN range, power control level set to maximum power. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Half rate

The multirate configuration indicates the use of the following set of codecs modes:

Codec Mode

TCH/AHS in kbit/s

CODEC_MODE_3

7.95

CODEC_MODE_2

6.7

CODEC_MODE_1

4,75

The Initial Codec mode (ICM) shall be set to the lowest codec mode (CODEC_MODE_1).

The SS sends a CMC and CMI corresponding to the lowest codec mode (CODEC_MODE_1).

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with TUhigh propagation characteristics. The SS transmits the wanted signal (Standard Test Signal C1) on the traffic channel, with TUhigh propagation profile, at the nominal frequency of the receiver at a level of 28 dBVemf (-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot and on same ARFCN of the wanted signal.

The SS commands the MS to establish the TCH burst-by-burst loop, see subclause 36.

21.4.3.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.4.3.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where (i) corresponds to the case determined by the BER of the looped back bursts (table 21.4.3.5). The SS shall take 10 samples.

When sumi=0..14(sample counter(i)) = 550 the CMI shall be changed to indicate CODEC_MODE_2, and at 1100 CMI = CODEC_MODE_3.

c) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

d) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating steps (b) and (c) until case 14 is reached.

e) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.

f) Steps d) and e) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 1650.

g) The SS releases the call.

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

Maximum Duration of Test

14 minutes.

21.4.3.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.4.3.5: Test criteria and limits for RXQUAL_FULL for TCH/AFS

Case

(i)

BER estimated by MS/SS (all applicable bursts)

(%)

Expected RXQUAL

(RXQUAL_)

Test limit

DTX Off

(%)

0

<0.1

0, 1

18.3

1

>=0.1, <0.26

0, 1, 2

18.3

2

>=0.26, <0.3

0, 1, 2

18.3

3

>=0.3, <0.51

0, 1, 2, 3

18.3

4

>=0.51, <0.64

1, 2, 3

18.3

5

>=0.64, <1.0

1, 2, 3, 4

30.5

6

>=1.0, <1.3

2, 3, 4

30.5

7

>=1.3, <1.9

2, 3, 4, 5

30.5

8

>=1.9, <2.7

3, 4, 5

30.5

9

>=2.7, <3.8

3, 4, 5, 6

30.5

10

>=3.8, <5.4

4, 5, 6

12.2

11

>=5.4, <7.6

4, 5, 6, 7

12.2

12

>=7.6, <11.0

5, 6, 7

12.2

13

>=11.0, <15.0

5, 6, 7

12.2

14

>=15.0

6, 7

12.2

21.4.4 Signal quality under TU High propagation conditions – O-TCH/WFS

21.4.4.1 Definition

The MS shall be capable of measuring the received signal quality, which is specified in terms of bit error ratio (BER) before channel decoding averaged over the reporting period of length of one SACCH multiframe defined in subclause 8.4 of 3GPP TS 05.08. The MS shall map this BER into RXQUAL values using the coding scheme defined in subclause 8.2.4 of 3GPP TS 05.08. For the full rate channel without downlink DTX, the error assessment is based on 104 TDMA frames: RXQUAL_FULL.

21.4.4.2 Conformance requirement

1. The received signal quality shall be measured by the MS and BSS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of 1 SACCH block; 3GPP TS 05.08 subclauses 8.2.2.

When the quality is assessed over the full‑set and sub‑set of frames defined in subclause 8.4, eight levels of RXQUAL are defined and shall be mapped to the equivalent BER before channel decoding as follows:

RXQUAL_0 BER < 0,2 % Assumed value = 0,14 %
RXQUAL_1 0,2 % < BER < 0,4 % Assumed value = 0,28 %
RXQUAL_2 0,4 % < BER < 0,8 % Assumed value = 0,57 %
RXQUAL_3 0,8 % < BER < 1,6 % Assumed value = 1,13 %
RXQUAL_4 1,6 % < BER < 3,2 % Assumed value = 2,26 %
RXQUAL_5 3,2 % < BER < 6,4 % Assumed value = 4,53 %
RXQUAL_6 6,4 % < BER < 12,8 % Assumed value = 9,05 %
RXQUAL_7 12,8 % < BER Assumed value = 18,10 %

3GPP 05.08, subclause 8.2.4

2. For each channel, the measured parameters (RXQUAL) shall be the received signal quality, averaged on that channel over the reporting period of length one SACCH multiframe defined in subclause 8.4. In averaging, measurements made during previous reporting periods shall always be discarded; 3GPP TS 05.08, subclause 8.2.3.

21.4.4.3 Test purpose

1. To verify, under TUhigh conditions, that the received signal quality is measured and reported to the eight levels of RXQUAL_FULL by the MS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of length one SACCH multiframe for the O-TCH/WFS. The probability that the correct RXQUAL band is reported shall meet the values given by the table in 3GPP TS 05.08 subclause 8.2.

2. To verify that the reported parameters (RXQUAL) is the received signal quality, averaged over the reporting period of length one SACCH multiframe.

21.4.4.4 Method of test

21.4.4.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a O-TCH/WFS with an ARFCN in the Mid ARFCN range, power control level set to maximum power. The RADIO_LINK_TIMEOUT parameter value is set to maximum.

Specific PICS Statements:

PIXIT Statements:

– Loop C delay Full rate

The multirate configuration indicates the use of the following set of codecs modes:

Codec Mode

O-TCH/WFS in kbit/s

CODEC_MODE_4

23,85

CODEC_MODE_3

12,65

CODEC_MODE_2

8,85

CODEC_MODE_1

6,60

The Initial Codec Mode shall be set to the lowest codec mode (CODEC_MODE_1).

The SS sends a CMC and CMI corresponding to the lowest codec mode (CODEC_MODE_1).

The SS produces a wanted signal and an independent uncorrelated interfering (unwanted) signal, both with TUhigh propagation characteristics. The SS transmits the wanted signal (Standard Test Signal C1) on the traffic channel, with TUhigh propagation profile, at the nominal frequency of the receiver at a level of 28 dBVemf (-85 dBm). The unwanted signal is the standard test signal I1, on the same timeslot and on same ARFCN of the wanted signal.

The SS commands the MS to establish the TCH burst-by-burst loop (C), see subclause 36.

21.4.4.4.2 Procedure

a) The SS sets the level of the unwanted signal such that the BER of the looped back bursts, averaged over the reporting period as defined in 3GPP TS 05.08, subclause 8.4, is covered by one of the cases 1 to 13 of table 21.4.4.5.

b) The SS verifies that the MS reports RXQUAL and whether or not the reported level is correct by comparison with the RXQUAL level of the corresponding looped back bursts. The SS increases a sample counter(i), and then an event counter(i) for each incorrect MS reported RXQUAL level, where i corresponds to the case determined by the BER of the looped back bursts (table 21.4.4.5). The SS shall take 10 samples.

c) When sumi=0..14(sample counter(i)) = 400 the CMI shall be changed to indicate CODEC_MODE_2, at 800 CMI = CODEC_MODE_3, and at 1200 CMI = CODEC_MODE_4.

d) If the previous RXQUAL_n >= 6 the SS shall set the unwanted signal to a level that ensures SACCH bursts will be successfully received by the MS. The SS shall wait 7 SACCH multiframe periods. The SS shall reapply the unwanted signal, then wait 1 SACCH multiframe period *2

e) The SS shall increase the level of the unwanted signal in small steps*1, after each level change repeating steps (b) and (c) until case 14 is reached.

f) The SS shall decrease the level of the unwanted signal in small steps*1, after each level change repeating step (b) and (c) until case 0 is reached.

g) Steps d) and e) should be repeated until the total number of samples, sumi=0..14(sample counter(i)) is a minimum of 1650.

h) The SS releases the call.

*1 NOTE: It is intended that the small steps are ~0.2dB, however the accuracy and linearity of these steps is inconsequential to the outcome of the test. It is intended that the test will be performed over a range of C/I which are representative of the normal operational range of the MS.

*2 NOTE: This special case for poor RF conditions is intended to ensure that the RADIO_LINK_TIMEOUT does not expire. The values have been selected to guarantee a net SACCH/T FER less than 62% (effective limit before failure ~67%).

Maximum Duration of Test

14 minutes.

21.4.4.5 Test requirements

The sets of test results for sample counter (i) and event counter (i) should be combined as follows.

sum i=0..14 ((event counter i * 100) / test limit i)

———————————————————–

sum i=0..14 (sample counter i)

A result of <1 is a pass, >=1 is a fail.

Table 21.4.4.5: Test criteria and limits for RXQUAL FULL errors for O-TCH/WFS

Case

(i)

BER estimated by MS/SS (all applicable bursts)

(%)

Expected

RXQUAL (RXQUAL_)

Test limit

0

<0.1

0, 1

18.3

1

>=0.1, <0.26

0, 1, 2

18.3

2

>=0.26, <0.3

0, 1, 2

18.3

3

>=0.3, <0.51

0, 1, 2, 3

18.3

4

>=0.51, <0.64

1, 2, 3

18.3

5

>=0.64, <1.0

1, 2, 3, 4

30.5

6

>=1.0, <1.3

2, 3, 4

30.5

7

>=1.3, <1.9

2, 3, 4, 5

30.5

8

>=1.9, <2.7

3, 4, 5

30.5

9

>=2.7, <3.8

3, 4, 5, 6

30.5

10

>=3.8, <5.4

4, 5, 6

12.2

11

>=5.4, <7.6

4, 5, 6, 7

12.2

12

>=7.6, <11.0

5, 6, 7

12.2

13

>=11.0, <15.0

5, 6, 7

12.2

14

>=15.0

6, 7

12.2

21.5 to 21.7 Void

21.8 GMSK_MEAN_BEP Measurement for PDTCH

In order to have a testing performance corresponding to that in clause 14 for high error rates, the multiplication factor of the tested error rate with respect to the specified error rate have been increased. The following figures have been used (static propagation conditions):

Specified error rate

Multiplication factor

Min. error events

 25 %

1,22

200

30 – 40 %

1,15

300

> 40 %

1,1

400

21.8.1 Definition

The MS must be capable of measuring the MEAN_BEP parameters under static channel conditions, which is specified in terms of bit error probability (BEP) before channel decoding averaged over the four bursts in a radio block and then filtered for the measurement report. The MS has to map this filtered BEP into MEAN_BEP values in the table “MEAN_BEP mapping and accuracy for GMSK” in subclause 8.2.5 of 3GPP TS 45.008. The accuracy requirements in this table apply for static channel conditions for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS.

21.8.2 Conformance requirement

The mapping of the MEAN_BEP to the equivalent BEP and the accuracies to which an MS shall be capable of estimating the quality parameters under static channel conditions are given for EGPRS GMSK in table 21.8-1. The accuracy requirements below apply for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS, assuming no changes in transmitted downlink power. For EGPRS, filtering according to 3GPP TS 45.008 subclause 10.2.3.2.1 with forgetting factor of 0.03 is assumed.

Table 21.8-1: MEAN_BEP mapping and accuracy for EGPRS GMSK

MEAN_BEP

Range of
log10(actual BEP)

Expected MEAN_BEP
interval

Probability that the expected MEAN_BEP is reported shall not be lower than:

MEAN_BEP_0

> -0.60

MEAN_BEP_0/1

80 %

MEAN_BEP_1

-0.70 — -0.60

MEAN_BEP_1/0/2

80 %

MEAN_BEP_2

-0.80 — -0.70

MEAN_BEP_2/1/3

75 %

MEAN_BEP_3

-0.90 — -0.80

MEAN_BEP_3/2/4

75 %

MEAN_BEP_4

-1.00 — -0.90

MEAN_BEP_4/3/5

75 %

MEAN_BEP_5

-1.10 — -1.00

MEAN_BEP_5/4/6

75 %

MEAN_BEP_6

-1.20 — -1.10

MEAN_BEP_6/5/7

75 %

MEAN_BEP_7

-1.30 — -1.20

MEAN_BEP_7/6/8

75 %

MEAN_BEP_8

-1.40 — -1.30

MEAN_BEP_8/7/9

75 %

MEAN_BEP_9

-1.50 — -1.40

MEAN_BEP_9/8/10

75 %

MEAN_BEP_10

-1.60 — -1.50

MEAN_BEP_10/9/11

70 %

MEAN_BEP_11

-1.70 — -1.60

MEAN_BEP_11/10/12

70 %

MEAN_BEP_12

-1.80 — -1.70

MEAN_BEP_12/11/13

70 %

MEAN_BEP_13

-1.90 — -1.80

MEAN_BEP_13/12/14

70 %

MEAN_BEP_14

-2.00 — -1.90

MEAN_BEP_14/13/15

70 %

MEAN_BEP_15

-2.10 — -2.00

MEAN_BEP_15/13/14/16/17

80 %

MEAN_BEP_16

-2.20 — -2.10

MEAN_BEP_16/14/15/17/18

80 %

MEAN_BEP_17

-2.30 — -2.20

MEAN_BEP_17/15/16/18/19

80 %

MEAN_BEP_18

-2.40 — -2.30

MEAN_BEP_18/16/17/19/20

80 %

MEAN_BEP_19

-2.50 — -2.40

MEAN_BEP_19/17/18/20/21

80 %

MEAN_BEP_20

-2.60 — -2.50

MEAN_BEP_20/18/19/21/22

80 %

MEAN_BEP_21

-2.70 — -2.60

MEAN_BEP_21/19/20/22/23

80 %

MEAN_BEP_22

-2.80 — -2.70

MEAN_BEP_22/20/21/23/24

80 %

MEAN_BEP_23

-2.90 — -2.80

MEAN_BEP_23/21/22/24/25

80 %

MEAN_BEP_24

-3.00 — -2.90

MEAN_BEP_24/22/23/25/26

80 %

MEAN_BEP_25

-3.10 — -3.00

MEAN_BEP_25/22/23/24/26/27/28

75 %

MEAN_BEP_26

-3.20 — -3.10

MEAN_BEP_26/23/24/25/27/28/29

75 %

MEAN_BEP_27

-3.30 — -3.20

MEAN_BEP_27/24/25/26/28/29/30

75 %

MEAN_BEP_28

-3.40 — -3.30

MEAN_BEP_28/25/26/27/29/30/31

75 %

MEAN_BEP_29

-3.50 — -3.40

MEAN_BEP_29/26/27/28/30/31

90 %

MEAN_BEP_30

-3.60 — -3.50

MEAN_BEP_30/27/28/29/31

90 %

MEAN_BEP_31

< -3.60

MEAN_BEP_31/28/29/30

90 %

Reference: 3GPP TS 45.008 subclause 8.2.5.

21.8.3 Test purpose

To verify for EGPRS, under static channel conditions, that the BEP is measured and mapped to the MEAN_BEP values defined in subclause 8.2.5 of 3GPP TS 45.008 by the MS in a manner that can be related to an equivalent average BEP before channel decoding. The probability that the correct MEAN_BEP value is reported shall meet the values in the table “MEAN_BEP mapping and accuracy for GMSK” in subclause 8.2.5 of 3GPP TS 45.008.

21.8.4 Method of test

The SS compares the long-term BER average calculated by counting bit errors determined in EGPRS loop-back mode to a set of related MEAN_BEP values.

The MEAN_BEP values correspond to the same MS-received bits that are looped-back for calculation of the long-term BER average (one-phase approach). For acquiring these MEAN_BEP values, the SS periodically opens the test loop for a short period of time to poll the MS for a measurement report.

The testing of BEP accuracy is performed at 3 sample points inside the ranges given in table 21.8-2.

Table 21.8-2: MEAN_BEP GMSK test intervals

Interval

Range of log10(actual BEP)

Range of
actual BEP [%]

Range of expected MEAN_BEP

High

< -3.6

< 0.025

31

Mid

-2.7 … -2.1

0.2 … 0.79

16 … 21

Low

-2.0 … -1.5

1.0 … 3.16

10 … 14

NOTE 1: At the beginning of the test procedure, the forgetting factor “e” is set to 0.03. It is not changed any more since the SS does not know if signalling messages are correctly received unless the MS misses the commands to open or close the loop which the SS can easily detect and which requires a retransmission.

NOTE 2: The MS is polled only after 150 radio blocks since only then the BEP contribution of the command to close the loop (which is not looped back) has decayed.

NOTE 3: For acquisition of measurement reports, the test loop has to be opened for a short period of time. During that period, no data shall be received by the MS that is used for calculating MEAN_BEP estimates.

NOTE 4: The above range of expected MEAN_BEP for intervals Mid and Low have been defined in a way that the accuracy requirements are the same for a given range.

21.8.4.1 Initial conditions

The SS produces a wanted signal and a white noise signal as an interferer (random signal) known as unwanted signal, both with static propagation characteristics. The SS transmits the wanted signal (standard test signal C1) on the PDTCH channel using the MCS-4 at the nominal frequency of the receiver and with a level of –82 dBm. The unwanted signal is the standard test signal I3, on the same nominal frequency.

The MS is EGPRS capable and in the state "idle, GMM-registered" with a P-TMSI allocated.

21.8.4.2 Procedure

a) The unwanted signal is switched off and the forgetting factor “e” is set to 0.03. The SS orders the MS into the EGPRS Switched Radio Block Loopback Mode as specified in 3GPP TS 44.014 Section 5.5.1. The SS commands the MS into Radio Block Loopback Sub-mode: OFF.

b) The SS commands the MS into Radio Block Loopback Sub-mode: ON. The SS sends 150 radio blocks to the MS. After these 150 radio blocks the SS commands the MS into Radio Block Loopback Sub-mode: OFF and polls the MS to send a measurement report. The SS starts sending data blocks with TFI not assigned to the DUT until it has received the measurement report. The SS stores the MEAN_BEP value reported by the MS and calculates (updates) the average BER of all looped back bits received so far.

c) The SS repeats the procedure described in step b) for a total of 1640 times.

d) The SS counts the number of MEAN_BEP values outside the expected MEAN_BEP interval corresponding to MEAN_BEP_31 and stores the result in error counter N_high. The BER calculation is reset.

e) The SS commands the MS into Radio Block Loopback Sub-mode: ON, switches the noise signal on and raises the level of the unwanted signal until the BER of the looped back data is between 0.25% and 0.63% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_21 and MEAN_BEP_16, respectively. During the measurements the level of the unwanted signal shall be kept constant.

f) The SS repeats the procedure described in step b) for a total of 820 times.

g) The SS determines the expected MEAN_BEP interval corresponding to the average BER of all looped back bits using table 21.8-1. The SS determines the number of MEAN_BEP values outside this interval and stores the result in error counter N_mid. The BER calculation is reset.

h) The SS commands the MS into Radio Block Loopback Sub-mode: ON and raises the level of the unwanted signal until the BER of the looped back data is between 1.26% and 2.51% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_14 and MEAN_BEP_10, respectively. During the measurements the level of the unwanted signal shall be kept constant.

i) The SS repeats the procedure described in step b) for a total of 870 times.

j) The SS determines the expected MEAN_BEP interval corresponding to the average BER of all looped back bits using table 21.8-1. The SS determines the number of MEAN_BEP values outside this interval and stores the result in error counter N_low.

Expected maximum test time for statistical error limit tests: 3h 30 min.

21.8.5 Test requirements

Testing of the conformance requirement can be done either with fixed minimum number of samples or based on the statistical test method that could lead to an early pass/fail decision with test time significantly reduced for a MS not on the limit.

21.8.5.1 Fixed limit test with minimum number of samples

The fixed testing of the conformance requirement is done using the minimum number of samples and the limit error rate given in table 21.8-3.

The number of error events determined in steps d), g) and j) stored in error counters N_high, N_mid and N_low shall not exceed the error event limit defined in table 21.8-3 for each of the error counters.

Table 21.8-3: Test criteria and error limits for MEAN_BEP_GMSK

Range

Specified

error limit

Tested

error limit

Number of

test samples

Error event limit

High

10 %

12.2 %

1640

200

Mid

20 %

24.4 %

820

200

Low

30 %

34.5 %

870

300

21.8.5.2 Statistical test with early pass / fail decision

Specific details on statistical testing of performance are defined in Annex 7.

The calculation of the error rate for this test shall be done according to the values specified in tables 21.8-4.

Table 21.8-4: Statistical error limits for MEAN_BEP_GMSK

Range

Block
per s

Org. error rate requirement

Derived test limit

Target number of samples

Target test time /s
Note1

Target test time /hh:mm:ss

High

50

0,122

0,150548

2292

6875

01:54:35

Mid

50

0,244

0,301096

1146

3437

00:57:17

Low

50

0,345

0,42573

810

2431

00:40:31

Note1: Test time is based on the calculation that only every 150th radio block is used for error calculation.

21.9 8PSK_MEAN_BEP Measurement for PDTCH

In order to have a testing performance corresponding to that in clause 14 for high error rates, the multiplication factor of the tested error rate with respect to the specified error rate have been increased. The following figures have been used (static propagation conditions):

Specified error rate

Multiplication factor

Min. error events

 25 %

1,22

200

30 – 40 %

1,15

300

> 40 %

1,1

400

21.9.1 Definition

The MS must be capable of measuring the MEAN_BEP parameters under static channel conditions, which is specified in terms of bit error probability (BEP) before channel decoding averaged over the four bursts in a radio block and then filtered for the measurement report. The MS has to map this filtered BEP into MEAN_BEP values in the table “MEAN_BEP mapping and accuracy for 8PSK” in subclause 8.2.5 of 3GPP TS 45.008. The accuracy requirements in this table apply for static channel conditions for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS.

21.9.2 Conformance requirement

The mapping of the MEAN_BEP to the equivalent BEP and the accuracies to which an MS shall be capable of estimating the quality parameters under static channel conditions are given for EGPRS 8PSK in table 21.9-1. The accuracy requirements below apply for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS, assuming no changes in transmitted downlink power. For EGPRS, filtering according to 3GPP TS 45.008 subclause 10.2.3.2.1 with forgetting factor of 0.03 is assumed.

Table 21.9-1: MEAN_BEP mapping and accuracy for EGPRS 8PSK

MEAN_BEP

Range of
log10(actual BEP)

Expected MEAN_BEP
interval

Probability that the expected MEAN_BEP is reported shall not be lower than:

MEAN_BEP_0

> -0.60

MEAN_BEP_0/1/2

85 %

MEAN_BEP_1

-0.64 — -0.60

MEAN_BEP_1/0/2/3

85 %

MEAN_BEP_2

-0.68 — -0.64

MEAN_BEP_2/0/1/3/4

85 %

MEAN_BEP_3

-0.72 — -0.68

MEAN_BEP_3/1/2/4/5

85 %

MEAN_BEP_4

-0.76 — -0.72

MEAN_BEP_4/2/3/5/6

85 %

MEAN_BEP_5

-0.80 — -0.76

MEAN_BEP_5/3/4/6/7

85 %

MEAN_BEP_6

-0.84 — -0.80

MEAN_BEP_6/4/5/7/8

85 %

MEAN_BEP_7

-0.88 — -0.84

MEAN_BEP_7/5/6/8/9

85 %

MEAN_BEP_8

-0.92 — -0.88

MEAN_BEP_8/6/7/9/10

80 %

MEAN_BEP_9

-0.96 — -0.92

MEAN_BEP_9/7/8/10/11

80 %

MEAN_BEP_10

-1.00 — -0.96

MEAN_BEP_10/8/9/11/12

80 %

MEAN_BEP_11

-1.04 — -1.00

MEAN_BEP_11/9/10/12/13

80 %

MEAN_BEP_12

-1.08 — -1.04

MEAN_BEP_12/10/11/13/14

80 %

MEAN_BEP_13

-1.12 — -1.08

MEAN_BEP_13/11/12/14/15

80 %

MEAN_BEP_14

-1.16 — -1.12

MEAN_BEP_14/12/13/15/16

85 %

MEAN_BEP_15

-1.20 — -1.16

MEAN_BEP_15/13/14/16

85 %

MEAN_BEP_16

-1.36 — -1.20

MEAN_BEP_16/14/15/17

85 %

MEAN_BEP_17

-1.52 — -1.36

MEAN_BEP_17/16/18

95 %

MEAN_BEP_18

-1.68 — -1.52

MEAN_BEP_18/17/19

95 %

MEAN_BEP_19

-1.84 — -1.68

MEAN_BEP_19/18/20

95 %

MEAN_BEP_20

-2.00 — -1.84

MEAN_BEP_20/19/21

95 %

MEAN_BEP_21

-2.16 — -2.00

MEAN_BEP_21/20/22

85 %

MEAN_BEP_22

-2.32 — -2.16

MEAN_BEP_22/21/23

85 %

MEAN_BEP_23

-2.48 — -2.32

MEAN_BEP_23/22/24

85 %

MEAN_BEP_24

-2.64 — -2.48

MEAN_BEP_24/23/25

85 %

MEAN_BEP_25

-2.80 — -2.64

MEAN_BEP_25/23/24/26/27

85 %

MEAN_BEP_26

-2.96 — -2.80

MEAN_BEP_26/24/25/27/28

85 %

MEAN_BEP_27

-3.12 — -2.96

MEAN_BEP_27/25/26/28/29

80 %

MEAN_BEP_28

-3.28 — -3.12

MEAN_BEP_28/26/27/29/30

80 %

MEAN_BEP_29

-3.44 — -3.28

MEAN_BEP_29/27/28/30/31

80 %

MEAN_BEP_30

-3.60 — -3.44

MEAN_BEP_30/28/29/31

90 %

MEAN_BEP_31

< -3.60

MEAN_BEP_31/29/30

90 %

Reference: 3GPP TS 45.008 subclause 8.2.5.

21.9.3 Test purpose

To verify for EGPRS, under static channel conditions, that the BEP is measured and mapped to the MEAN_BEP values defined in subclause 8.2.5 of 3GPP TS 45.008 by the MS in a manner that can be related to an equivalent average BEP before channel decoding. The probability that the correct MEAN_BEP value is reported shall meet the values in the table “MEAN_BEP mapping and accuracy for 8PSK” in subclause 8.2.5 of 3GPP TS 45.008.

21.9.4 Method of test

The SS compares the long-term BER average calculated by counting bit errors determined in EGPRS loop-back mode to a set of related MEAN_BEP values.

The MEAN_BEP values correspond to the same MS-received bits that are looped-back for calculation of the long-term BER average (one-phase approach). For acquiring these MEAN_BEP values, the SS periodically opens the test loop for a short period of time to poll the MS for a measurement report.

The testing of BEP accuracy is performed at 3 sample points inside the ranges given in table 21.9-2.

Table 21.9-2: MEAN_BEP 8PSK test intervals

Interval

Range of log10(actual BEP)

Range of
actual BEP [%]

Range of expected MEAN_BEP

High

< -3.6

< 0.025

31

Mid

-2.0 … -1.36

1.0 … 4.37

17 … 20

Low

-1.12 … -0.88

7.59 … 13.2

8 … 13

NOTE 1: At the beginning of the test procedure, the forgetting factor “e” is set to 0.03. It is not changed any more since the SS does not know if signalling messages are correctly received unless the MS misses the commands to open or close the loop which the SS can easily detect and which requires a retransmission.

NOTE 2: The MS is polled only after 150 radio blocks since only then the BEP contribution of the command to close the loop (which is not looped back) has decayed.

NOTE 3: For acquisition of measurement reports, the test loop has to be opened for a short period of time. During that period, no data shall be received by the MS that is used for calculating MEAN_BEP estimates.

NOTE 4: The above range of expected MEAN_BEP for intervals Mid and Low have been defined in a way that the accuracy requirements are the same for a given range.

21.9.4.1 Initial conditions

The SS produces a wanted signal and a white noise signal as an interferer (random signal) known as unwanted signal, both with static propagation characteristics. The SS transmits the wanted signal (standard test signal C1) on the PDTCH channel using the MCS-9 at the nominal frequency of the receiver and with a level of –82 dBm. The unwanted signal is the standard test signal I3, on the same nominal frequency.

The MS is EGPRS capable and in the state "idle, GMM-registered" with a P-TMSI allocated.

21.9.4.2 Procedure

a) The unwanted signal is switched off and the forgetting factor “e” is set to 0.03. The SS orders the MS into the EGPRS Switched Radio Block Loopback Mode as specified in 3GPP TS 44.014 Section 5.5.1. The SS commands the MS into Radio Block Loopback Sub-mode: OFF.

b) The SS commands the MS into Radio Block Loopback Sub-mode: ON. The SS sends 150 radio blocks to the MS. After these 150 radio blocks the SS commands the MS into Radio Block Loopback Sub-mode: OFF and polls the MS to send a measurement report. The SS starts sending data blocks with TFI not assigned to the DUT until it has received the measurement report. The SS stores the MEAN_BEP value reported by the MS and calculates (updates) the average BER of all looped back bits received so far.

c) The SS repeats the procedure described in step b) for a total of 1640 times.

d) The SS counts the number of MEAN_BEP values outside the expected MEAN_BEP interval corresponding to MEAN_BEP_31 and stores the result in error counter N_high. The BER calculation is reset.

e) The SS commands the MS into Radio Block Loopback Sub-mode: ON, switches the noise signal on and raises the level of the unwanted signal until the BER of the looped back data is between 1.4% and 3% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_20 and MEAN_BEP_17, respectively. During the measurements the level of the unwanted signal shall be kept constant.

f) The SS repeats the procedure described in step b) for a total of 3279 times.

g) The SS determines the expected MEAN_BEP interval corresponding to the average BER of all looped back bits using table 21.9-1. The SS determines the number of MEAN_BEP values outside this interval and stores the result in error counter N_mid. The BER calculation is reset.

h) The SS commands the MS into Radio Block Loopback Sub-mode: ON and raises the level of the unwanted signal until the BER of the looped back data is between 8.3% and 12% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_13 and MEAN_BEP_8, respectively. During the measurements the level of the unwanted signal shall be kept constant.

i) The SS repeats the procedure described in step b) for a total of 820 times.

j) The SS determines the expected MEAN_BEP interval corresponding to the average BER of all looped back bits using table 21.9-1. The SS determines the number of MEAN_BEP values outside this interval and stores the result in error counter N_low.

Expected maximum test time for statistical error limit tests: 6h 40 min.

21.9.5 Test requirements

Testing of the conformance requirement can be done either with fixed minimum number of samples or based on the statistical test method that could lead to an early pass/fail decision with test time significantly reduced for a MS not on the limit.

21.9.5.1 Fixed limit test with minimum number of samples

The fixed testing of the conformance requirement is done using the minimum number of samples and the limit error rate given in table 21.9-3.

The number of error events determined in steps d), g) and j) stored in error counters N_high, N_mid and N_low shall not exceed 200 for each of the error counters.

Table 21.9-3: Test criteria and error limits for MEAN_BEP_8PSK

Range

Specified

error limit

Tested

error limit

Number of

test samples

Error event limit

High

10 %

12.2 %

1640

200

Mid

5 %

6.1 %

3279

200

Low

20 %

24.4 %

820

200

21.9.5.2 Statistical test with early pass / fail decision

Specific details on statistical testing of performance are defined in Annex 7.

The calculation of the error rate for this test shall be done according to the values specified in tables 21.8-4.

Table 21.9-4: Statistical error limits for MEAN_BEP_8PSK

Range

Block
per s

Org. error rate requirement

Derived test limit

Target number of samples

Target test time /s
Note1

Target test time /hh:mm:ss

High

50

0,122

0,150548

2292

6875

01:54:35

Mid

50

0,061

0,075274

4583

13750

03:49:10

Low

50

0,244

0,301096

1146

3437

00:57:17

NOTE 1: Test time is based on the calculation that only every 150th radio block is used for error calculation.

21.10 Measurement accuracy for inter-RAT system (TDD)

21.10.1 1,28Mcps TDD Option

21.10.1.1 1.28Mcps TDD / P-CCPCH RSCP Measurement absolute accuracy in AWGN propagation condition

21.10.1.1.1 Definition

The P-CCPCH_RSCP measurement absolute accuracy in GSM(GPRS) cell is defined as the P-CCPCH_RSCP measured from UE in GSM(GPRS) cell compared to the actual neighbor TD-SCDMA cell P-CCPCH_RSCP.

21.10.1.1.2 Minimum Requirements

The accuracy requirements in Table 21.10.1.1.2-1 are valid under the following conditions:

P-CCPCH RSCP  -102 dBm

P-CCPCH Ec/Io > -8 dB

DwPCH_Ec/Io > -5 dB

Table 21.10.1.1.2-1: P-CCPCH_RSCP absolute accuracy

Parameter

Unit

Accuracy [dB]

Conditions

Normal condition

Extreme condition

Io [dBm/ 1.28 MHz]

P-CCPCH_RSCP

dBm

 6

 9

-94…-70

dBm

 8

 11

-70…-50

The rate of correct measurements observed during repeated tests shall be at least 90%.

The normative reference for this requirement is TS 45.008 clauses 8.1.5.2.

21.10.1.1.3 Test Purpose

The purpose of this test is to verify that the relative P-CCPCH RSCP measurement accuracy is within the specified limits.

21.10.1.1.4 Method of test

21.10.1.1.4.1 Initial conditions

Test environment: normal, TL/VL, TL/VH, TH/VL, TH/VH; see TS 34.122 clauses G.2.1 and G.2.2.

Frequencies to be tested: mid range; see TS 34.122 clause G.2.4.

Cell 1 is a GSM cell and cell 2 is a UTRA TDD cell. In the measurement information message it is indicated to the UE that periodic reporting of the UTRA TDD PCCPCH RSCP measurement is used.

Table 21.10.1.1.4.1-1 Cell 1 GSM cell test parameters

Parameter

Unit

Test 1

Test 2

Test 3

UTRA RF Channel

2

Cell Level

dBm/200KHz

-70

Table 21.10.1.1.4.1-2: P-CCPCH RSCP test parameters

Test 1

Parameter

Unit

Cell 2

Timeslot Number

0

DwPTS

UTRA RF Channel Number

Channel 1

PCCPCH_Ec/Ior

dB

-3

DwPCH_Ec/Ior

dB

0

OCNS_Ec/Ior

dB

-3

dB

5

dBm/ 1.28 MHz

-75.2

PCCPCH RSCP, Note 1

dBm

-73.2

Io, Note 1

dBm/ 1.28 MHz

-69

Propagation condition

AWGN

Test 2

Parameter

Unit

Cell 2

Timeslot Number

0

DwPTS

UTRA RF Channel Number

Channel 1

PCCPCH_Ec/Ior

dB

-3

DwPCH_Ec/Ior

dB

0

OCNS_Ec/Ior

dB

-3

dB

2

dBm/ 1.28 MHz

-54.1

PCCPCH RSCP, Note 1

dBm

-55.1

Io, Note 1

dBm/ 1.28 MHz

-50

Propagation condition

AWGN

Test 3

Parameter

Unit

Cell 2

Timeslot Number

0

DwPTS

UTRA RF Channel Number

Channel 1

PCCPCH_Ec/Ior

dB

-3

DwPCH_Ec/Ior

dB

0

OCNS_Ec/Ior

dB

-3

dB

0

dBm/ 1.28 MHz

-97

PCCPCH RSCP, Note 1

dBm

-100

Io, Note 1

dBm/ 1.28 MHz

-94

Propagation condition

AWGN

Note 1: PCCPCH RSCP and Io levels have been calculated from other parameters for information purposes. They are not settable parameters themselves.

21.10.1.1.4.2 Procedure

1) Initial cell configured according to table 21.10.1.1.4.1-1 and table 21.10.1.1.4.1-2 a call is set up on cell1.

2) SS shall transmit MEASUREMENT INFORMATION message to indicate cell 2 neighbor cell description information based on table 21.10.1.1.4.1-2.

3) UE shall transmit periodically MEASUREMENT REPORT messages.

4) SS shall check PCCPCH_RSCP value of Cell 2 in MEASUREMENT REPORT messages.

5) The result of step 3) is compared to actual power level of PCCPCH RSCP of Cell 2.

6) SS shall count number of MEASUREMENT REPORT messages transmitted by UE. After 1000 MEASUREMENT REPORT messages have been received from UE, the RF parameters are set up according to table 21.10.1.1.4.1-1 and table 21.10.1.1.4.1-2 for Test 2. While RF parameters are being set up, MEASUREMENT REPORT messages from UE are ignored. SS shall wait for additional 1s and ignore the MEASUREMENT REPORT messages during this period. Then, steps 4) and 5) above are repeated.

7) SS shall count number of MEASUREMENT REPORT messages transmitted by UE. After 1000 MEASUREMENT REPORT messages have been received from UE, the RF parameters are set up according to table 21.10.1.1.4.1-1 and table 21.10.1.1.4.1-2 for Test 3. While RF parameters are being set up, MEASUREMENT REPORT messages from UE are ignored. SS shall wait for additional 1s and ignore the MEASUREMENT REPORT messages during this period. Then, steps 4) and 5) above are repeated.

8) After further 1000 MEASUREMENT REPORT messages have been received from UE, the SS shall transmit CHANNEL RELEASE message.

21.10.1.1.5 Test requirements

The P-CCPCH RSCP measurement accuracy shall meet the minimum requirements in clause 21.10.1.1.2 for at least 900 of the 1000 measurement reports in step 4.

NOTE: If the above Test Requirements differ from the Minimum Requirement, then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in 34.122 clause F.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in 34.122 clause F.4.

21.11a MEAN_BEP 16-QAM in EGPRS2-A Configuration

In order to have a testing performance corresponding to that in clause 14 for high error rates, the multiplication factor of the tested error rate with respect to the specified error rate have been increased. The following figures have been used (static propagation conditions):

Specified error rate

Multiplication factor

Min. error events

 25 %

1,22

200

30 – 40 %

1,15

300

> 40 %

1,1

400

21.11a.1 Definition

The MS must be capable of measuring the MEAN_BEP parameters under static channel conditions, which is specified in terms of bit error probability (BEP) before channel decoding averaged over the four bursts in a radio block and then filtered for the measurement report. The MS has to map this filtered BEP into MEAN_BEP values in the table “MEAN_BEP mapping and accuracy for 16-QAM (EGPRS2-A and EGPRS2-B)” in subclause 10.2.3.3 of 3GPP TS 45.008. The accuracy requirements in this table apply for static channel conditions for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS.

21.11a.2 Conformance requirement

The mapping of the MEAN_BEP to the equivalent BEP and the accuracies to which an MS shall be capable of estimating the quality parameters under static channel conditions are given for EGPRS2-A 16-QAM in table 21.11a-1. The accuracy requirements below apply for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS, assuming no changes in transmitted downlink power. The requirements apply for PDTCH/F in A/Gb mode, and the estimated values are averaged applying filtering according to subclause 10.2.3.2.1 with forgetting factor of 0.03.

Table 21.11a-1: MEAN_BEP mapping and accuracy for EGPRS2-A 16-QAM

MEAN_BEP

Range of
log10(actual BEP)

Expected MEAN_BEP
interval

Probability that the expected MEAN_BEP for EGPRS2-A is reported shall not be lower than see:

MEAN_BEP_0

[> -0.60]

MEAN_BEP_0/1/2

90 %

MEAN_BEP_1

[-0.64 — -0.60]

MEAN_BEP_1/0/2/3

90 %

MEAN_BEP_2

[-0.68 — -0.64]

MEAN_BEP_2/0/1/3/4

90 %

MEAN_BEP_3

[-0.72 — -0.68]

MEAN_BEP_3/1/2/4/5

90 %

MEAN_BEP_4

[-0.76 — -0.72]

MEAN_BEP_4/2/3/5/6

90 %

MEAN_BEP_5

[-0.80 — -0.76]

MEAN_BEP_5/3/4/6/7

90 %

MEAN_BEP_6

[-0.84 — -0.80]

MEAN_BEP_6/4/5/7/8

90 %

MEAN_BEP_7

[-0.88 — -0.84]

MEAN_BEP_7/5/6/8/9

90 %

MEAN_BEP_8

[-0.92 — -0.88]

MEAN_BEP_8/6/7/9/10

90 %

MEAN_BEP_9

[-0.96 — -0.92]

MEAN_BEP_9/7/8/10/11

90 %

MEAN_BEP_10

[-1.00 — -0.96]

MEAN_BEP_10/8/9/11/12

90 %

MEAN_BEP_11

[-1.04 — -1.00]

MEAN_BEP_11/9/10/12/13

90 %

MEAN_BEP_12

[-1.08 — -1.04]

MEAN_BEP_12/10/11/13/14

90 %

MEAN_BEP_13

[-1.12 — -1.08]

MEAN_BEP_13/11/12/14/15

90 %

MEAN_BEP_14

[-1.16 — -1.12]

MEAN_BEP_14/12/13/15/16

90 %

MEAN_BEP_15

[-1.20 — -1.16]

MEAN_BEP_15/13/14/16

90 %

MEAN_BEP_16

[-1.36 — -1.20]

MEAN_BEP_16/14/15/17

90 %

MEAN_BEP_17

[-1.52 — -1.36]

MEAN_BEP_17/16/18

90 %

MEAN_BEP_18

[-1.68 — -1.52]

MEAN_BEP_18/17/19

90 %

MEAN_BEP_19

[-1.84 — -1.68]

MEAN_BEP_19/18/20

90 %

MEAN_BEP_20

[-2.00 — -1.84]

MEAN_BEP_20/19/21

90 %

MEAN_BEP_21

[-2.16 — -2.00]

MEAN_BEP_21/20/22

90 %

MEAN_BEP_22

[-2.32 — -2.16]

MEAN_BEP_22/21/23

90 %

MEAN_BEP_23

[-2.48 — -2.32]

MEAN_BEP_23/22/24

90 %

MEAN_BEP_24

[-2.64 — -2.48]

MEAN_BEP_24/23/25

90 %

MEAN_BEP_25

[-2.80 — -2.64]

MEAN_BEP_25/23/24/26/27

90 %

MEAN_BEP_26

[-2.96 — -2.80]

MEAN_BEP_26/24/25/27/28

90 %

MEAN_BEP_27

[-3.12 — -2.96]

MEAN_BEP_27/25/26/28/29

90 %

MEAN_BEP_28

[-3.28 — -3.12]

MEAN_BEP_28/26/27/29/30

90 %

MEAN_BEP_29

[-3.44 — -3.28]

MEAN_BEP_29/27/28/30/31

90 %

MEAN_BEP_30

[-3.60 — -3.44]

MEAN_BEP_30/28/29/31

90 %

MEAN_BEP_31

[< -3.60]

MEAN_BEP_31/29/30

90 %

Reference: 3GPP TS 45.008 subclause 10.2.3.3.

21.11a.3 Test purpose

To verify for EGPRS2-A, under static channel conditions, that the BEP is measured and mapped to the MEAN_BEP values defined in subclause10.2.3.3 of 3GPP TS 45.008 by the MS in a manner that can be related to an equivalent average BEP before channel decoding. The probability that the correct MEAN_BEP value is reported shall meet the values in the table “MEAN_BEP mapping and accuracy for 16-QAM” in subclause 10.2.3.3 of 3GPP TS 45.008.

21.11a.4 Method of test

The SS compares the long-term BER average calculated by counting bit errors determined in EGPRS loop-back mode to a set of related MEAN_BEP values.

The MEAN_BEP values correspond to the same MS-received bits that are looped-back for calculation of the long-term BER average (one-phase approach). For acquiring these MEAN_BEP values, the SS periodically opens the test loop for a short period of time to poll the MS for a measurement report.

The testing of BEP accuracy is performed at 3 sample points inside the ranges given in table 21.11a-2.

Table 21.11a-2: MEAN_BEP 16-QAM test intervals

Interval

Range of log10(actual BEP)

Range of
actual BEP [%]

Range of expected MEAN_BEP

High

< -3.6

< 0.025

31

Mid

-2.0 … -1.36

1.0 … 4.37

17 … 20

Low

-1.12 … -0.88

7.59 … 13.2

8 … 13

NOTE 1: At the beginning of the test procedure, the forgetting factor “e” is set to 0.03. It is not changed any more since the SS does not know if signalling messages are correctly received unless the MS misses the commands to open or close the loop which the SS can easily detect and which requires a retransmission.

NOTE 2: The MS is polled only after 150 radio blocks since only then the BEP contribution of the command to close the loop (which is not looped back) has decayed.

NOTE 3: For acquisition of measurement reports, the test loop has to be opened for a short period of time. During that period, no data shall be received by the MS that is used for calculating MEAN_BEP estimates.

NOTE 4: The above range of expected MEAN_BEP for intervals Mid and Low have been defined in a way that the accuracy requirements are the same for a given range.

21.11a.4.1 Initial conditions

The SS produces a wanted signal and a white noise signal as an interferer (random signal) known as unwanted signal, both with static propagation characteristics. The SS transmits the wanted signal (standard test signal C1) on the PDTCH channel using the DAS-5-DAS-12 at the nominal frequency of the receiver and with a level of –82 dBm. The unwanted signal is the standard test signal I3, on the same nominal frequency.

The MS is EGPRS2-A capable and in the state "idle, GMM-registered" with a P-TMSI allocated.

21.11a.4.2 Procedure

a) The unwanted signal is switched off and the forgetting factor “e” is set to 0.03. The SS orders the MS into the EGPRS2-A Switched Radio Block Loopback Mode as specified in 3GPP TS 44.014 Section 5.5.6. The SS commands the MS into Radio Block Loopback Sub-mode: OFF.

b) The SS commands the MS into Radio Block Loopback Sub-mode: ON. The SS sends 150 radio blocks to the MS. After these 150 radio blocks the SS commands the MS into Radio Block Loopback Sub-mode: OFF and polls the MS to send a measurement report. The SS starts sending data blocks with TFI not assigned to the DUT until it has received the measurement report. The SS stores the MEAN_BEP value reported by the MS and calculates (updates) the average BER of all looped back bits received so far.

c) The SS repeats the procedure described in step b) for a total of 1640 times.

d) The SS counts the number of MEAN_BEP values outside the expected MEAN_BEP interval corresponding to MEAN_BEP_31 and stores the result in error counter N_high. The BER calculation is reset.

e) The SS commands the MS into Radio Block Loopback Sub-mode: ON, switches the noise signal on and raises the level of the unwanted signal until the BER of the looped back data is between 1.4% and 3% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_20 and MEAN_BEP_17, respectively. During the measurements the level of the unwanted signal shall be kept constant.

f) The SS repeats the procedure described in step b) for a total of 1640 times.

g) The SS determines the expected MEAN_BEP interval corresponding to the average BER of all looped back bits using table 21.11a-1. The SS determines the number of MEAN_BEP values outside this interval and stores the result in error counter N_mid. The BER calculation is reset.

h) The SS commands the MS into Radio Block Loopback Sub-mode: ON and raises the level of the unwanted signal until the BER of the looped back data is between 8.3% and 12% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_13 and MEAN_BEP_8, respectively. During the measurements the level of the unwanted signal shall be kept constant.

i) The SS repeats the procedure described in step b) for a total of 1640 times.

j) The SS determines the expected MEAN_BEP interval corresponding to the average BER of all looped back bits using table 21.11a-1. The SS determines the number of MEAN_BEP values outside this interval and stores the result in error counter N_low.

Expected maximum test time for statistical error limit tests: 5h 45 min.

21.11a.5 Test requirements

Testing of the conformance requirement can be done either with fixed minimum number of samples or based on the statistical test method that could lead to an early pass/fail decision with test time significantly reduced for a MS not on the limit.

21.11a.5.1 Fixed limit test with minimum number of samples

The fixed testing of the conformance requirement is done using the minimum number of samples and the limit error rate given in table 21.11a-3.

The number of error events determined in steps d), g) and j) stored in error counters N_high, N_mid and N_low shall not exceed the error event limit as defined in Table 21.11a-3 for each of the error counters.

Table 21.11a-3: Test criteria and error limits for MEAN_BEP_16-QAM

Range

Specified

error limit

Tested

error limit

Number of

test samples

Error event limit

High

10 %

12.2 %

1640

200

Mid

10 %

12.2 %

1640

200

Low

10 %

12.2 %

1640

200

21.11a.5.2 Statistical test with early pass / fail decision

Specific details on statistical testing of performance are defined in Annex 7.

The calculation of the error rate for this test shall be done according to the values specified in tables 21.11a-4.

Table 21.11a-4: Statistical error limits for MEAN_BEP_16-QAM

Range

Block
per s

Org. error rate requirement

Derived test limit

Target number of samples

Target test time /s
(Note)

Target test time /hh:mm:ss

High

50

0,122

0,150548

2292

6875

01:54:35

Mid

50

0,122

0,150548

2292

6875

01:54:35

Low

50

0,122

0,150548

2292

6875

01:54:35

NOTE: Test time is based on the calculation that only every 150th radio block is used for error calculation.

21.12a MEAN_BEP 32-QAM in EGPRS2-A Configuration

In order to have a testing performance corresponding to that in clause 14 for high error rates, the multiplication factor of the tested error rate with respect to the specified error rate have been increased. The following figures have been used (static propagation conditions):

Specified error rate

Multiplication factor

Min. error events

 25 %

1,22

200

30 – 40 %

1,15

300

> 40 %

1,1

400

21.12a.1 Definition

The MS must be capable of measuring the MEAN_BEP parameters under static channel conditions, which is specified in terms of bit error probability (BEP) before channel decoding averaged over the four bursts in a radio block and then filtered for the measurement report. The MS has to map this filtered BEP into MEAN_BEP values in the table “MEAN_BEP mapping and accuracy for 32-QAM (EGPRS2-A and EGPRS2-B)” in subclause 10.2.3.3 of 3GPP TS 45.008. The accuracy requirements in this table apply for static channel conditions for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS.

21.12a.2 Conformance requirement

The mapping of the MEAN_BEP to the equivalent BEP and the accuracies to which an MS shall be capable of estimating the quality parameters under static channel conditions are given for EGPRS2-A 32-QAM in table 21.12a-1. The accuracy requirements below apply for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS, assuming no changes in transmitted downlink power. The requirements apply for PDTCH/F in A/Gb mode, and the estimated values are averaged applying filtering according to subclause 10.2.3.2.1 with forgetting factor of 0.03.

Table 21.12a-1: MEAN_BEP mapping and accuracy for EGPRS2-A 32-QAM

MEAN_BEP

Range of
log10(actual BEP)

Expected MEAN_BEP
interval

Probability that the expected MEAN_BEP for EGPRS2-A is reported shall not be lower than:

MEAN_BEP_0

[> -0.60]

MEAN_BEP_0/1/2

90 %

MEAN_BEP_1

[-0.64 — -0.60]

MEAN_BEP_1/0/2/3

90 %

MEAN_BEP_2

[-0.68 — -0.64]

MEAN_BEP_2/0/1/3/4

90 %

MEAN_BEP_3

[-0.72 — -0.68]

MEAN_BEP_3/1/2/4/5

90 %

MEAN_BEP_4

[-0.76 — -0.72]

MEAN_BEP_4/2/3/5/6

90 %

MEAN_BEP_5

[-0.80 — -0.76]

MEAN_BEP_5/3/4/6/7

90 %

MEAN_BEP_6

[-0.84 — -0.80]

MEAN_BEP_6/4/5/7/8

90 %

MEAN_BEP_7

[-0.88 — -0.84]

MEAN_BEP_7/5/6/8/9

90 %

MEAN_BEP_8

[-0.92 — -0.88]

MEAN_BEP_8/6/7/9/10

90 %

MEAN_BEP_9

[-0.96 — -0.92]

MEAN_BEP_9/7/8/10/11

90 %

MEAN_BEP_10

[-1.00 — -0.96]

MEAN_BEP_10/8/9/11/12

90 %

MEAN_BEP_11

[-1.04 — -1.00]

MEAN_BEP_11/9/10/12/13

90 %

MEAN_BEP_12

[-1.08 — -1.04]

MEAN_BEP_12/10/11/13/14

90 %

MEAN_BEP_13

[-1.12 — -1.08]

MEAN_BEP_13/11/12/14/15

90 %

MEAN_BEP_14

[-1.16 — -1.12]

MEAN_BEP_14/12/13/15/16

90 %

MEAN_BEP_15

[-1.20 — -1.16]

MEAN_BEP_15/13/14/16

90 %

MEAN_BEP_16

[-1.36 — -1.20]

MEAN_BEP_16/14/15/17

90 %

MEAN_BEP_17

[-1.52 — -1.36]

MEAN_BEP_17/16/18

90 %

MEAN_BEP_18

[-1.68 — -1.52]

MEAN_BEP_18/17/19

90 %

MEAN_BEP_19

[-1.84 — -1.68]

MEAN_BEP_19/18/20

90 %

MEAN_BEP_20

[-2.00 — -1.84]

MEAN_BEP_20/19/21

90 %

MEAN_BEP_21

[-2.16 — -2.00]

MEAN_BEP_21/20/22

90 %

MEAN_BEP_22

[-2.32 — -2.16]

MEAN_BEP_22/21/23

90 %

MEAN_BEP_23

[-2.48 — -2.32]

MEAN_BEP_23/22/24

90 %

MEAN_BEP_24

[-2.64 — -2.48]

MEAN_BEP_24/23/25

90 %

MEAN_BEP_25

[-2.80 — -2.64]

MEAN_BEP_25/23/24/26/27

90 %

MEAN_BEP_26

[-2.96 — -2.80]

MEAN_BEP_26/24/25/27/28

90 %

MEAN_BEP_27

[-3.12 — -2.96]

MEAN_BEP_27/25/26/28/29

90 %

MEAN_BEP_28

[-3.28 — -3.12]

MEAN_BEP_28/26/27/29/30

90 %

MEAN_BEP_29

[-3.44 — -3.28]

MEAN_BEP_29/27/28/30/31

90 %

MEAN_BEP_30

[-3.60 — -3.44]

MEAN_BEP_30/28/29/31

90 %

MEAN_BEP_31

[< -3.60]

MEAN_BEP_31/29/30

90 %

Reference: 3GPP TS 45.008 subclause 10.2.3.3.

21.12a.3 Test purpose

To verify for EGPRS2-A, under static channel conditions, that the BEP is measured and mapped to the MEAN_BEP values defined in subclause10.2.3.3 of 3GPP TS 45.008 by the MS in a manner that can be related to an equivalent average BEP before channel decoding. The probability that the correct MEAN_BEP value is reported shall meet the values in the table “MEAN_BEP mapping and accuracy for 32-QAM” in subclause 10.2.3.3 of 3GPP TS 45.008.

21.12a.4 Method of test

The SS compares the long-term BER average calculated by counting bit errors determined in EGPRS2-A loop-back mode to a set of related MEAN_BEP values.

The MEAN_BEP values correspond to the same MS-received bits that are looped-back for calculation of the long-term BER average (one-phase approach). For acquiring these MEAN_BEP values, the SS periodically opens the test loop for a short period of time to poll the MS for a measurement report.

The testing of BEP accuracy is performed at 3 sample points inside the ranges given in table 21.12a-2.

Table 21.12a-2: MEAN_BEP 32-QAM test intervals

Interval

Range of log10(actual BEP)

Range of
actual BEP [%]

Range of expected MEAN_BEP

High

< -3.6

< 0.025

31

Mid

-2.0 … -1.36

1.0 … 4.37

17 … 20

Low

-1.12 … -0.88

7.59 … 13.2

8 … 13

NOTE 1: At the beginning of the test procedure, the forgetting factor “e” is set to 0.03. It is not changed any more since the SS does not know if signalling messages are correctly received unless the MS misses the commands to open or close the loop which the SS can easily detect and which requires a retransmission.

NOTE 2: The MS is polled only after 150 radio blocks since only then the BEP contribution of the command to close the loop (which is not looped back) has decayed.

NOTE 3: For acquisition of measurement reports, the test loop has to be opened for a short period of time. During that period, no data shall be received by the MS that is used for calculating MEAN_BEP estimates.

NOTE 4: The above range of expected MEAN_BEP for intervals Mid and Low have been defined in a way that the accuracy requirements are the same for a given range.

21.12a.4.1 Initial conditions

The SS produces a wanted signal and a white noise signal as an interferer (random signal) known as unwanted signal, both with static propagation characteristics. The SS transmits the wanted signal (standard test signal C1) on the PDTCH channel using the DAS-5-DAS-12 at the nominal frequency of the receiver and with a level of –82 dBm. The unwanted signal is the standard test signal I3, on the same nominal frequency.

The MS is EGPRS2-A capable and in the state "idle, GMM-registered" with a P-TMSI allocated.

21.12a.4.2 Procedure

a) The unwanted signal is switched off and the forgetting factor “e” is set to 0.03. The SS orders the MS into the EGPRS2-A Switched Radio Block Loopback Mode as specified in 3GPP TS 44.014 Section 5.5.6. The SS commands the MS into Radio Block Loopback Sub-mode: OFF.

b) The SS commands the MS into Radio Block Loopback Sub-mode: ON. The SS sends 150 radio blocks to the MS. After these 150 radio blocks the SS commands the MS into Radio Block Loopback Sub-mode: OFF and polls the MS to send a measurement report. The SS starts sending data blocks with TFI not assigned to the DUT until it has received the measurement report. The SS stores the MEAN_BEP value reported by the MS and calculates (updates) the average BER of all looped back bits received so far.

c) The SS repeats the procedure described in step b) for a total of 1640 times.

d) The SS counts the number of MEAN_BEP values outside the expected MEAN_BEP interval corresponding to MEAN_BEP_31 and stores the result in error counter N_high. The BER calculation is reset.

e) The SS commands the MS into Radio Block Loopback Sub-mode: ON, switches the noise signal on and raises the level of the unwanted signal until the BER of the looped back data is between 1.4% and 3% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_20 and MEAN_BEP_17, respectively. During the measurements the level of the unwanted signal shall be kept constant.

f) The SS repeats the procedure described in step b) for a total of 1640 times.

g) The SS determines the expected MEAN_BEP interval corresponding to the average BER of all looped back bits using table 21.11a-1. The SS determines the number of MEAN_BEP values outside this interval and stores the result in error counter N_mid. The BER calculation is reset.

h) The SS commands the MS into Radio Block Loopback Sub-mode: ON and raises the level of the unwanted signal until the BER of the looped back data is between 8.3% and 12% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_13 and MEAN_BEP_8, respectively. During the measurements the level of the unwanted signal shall be kept constant.

i) The SS repeats the procedure described in step b) for a total of 1640 times.

j) The SS determines the expected MEAN_BEP interval corresponding to the average BER of all looped back bits using table 21.12a-1. The SS determines the number of MEAN_BEP values outside this interval and stores the result in error counter N_low.

Expected maximum test time for statistical error limit tests: 5h 45 min.

21.12a.5 Test requirements

Testing of the conformance requirement can be done either with fixed minimum number of samples or based on the statistical test method that could lead to an early pass/fail decision with test time significantly reduced for a MS not on the limit.

21.12a.5.1 Fixed limit test with minimum number of samples

The fixed testing of the conformance requirement is done using the minimum number of samples and the limit error rate given in table 21.12a-3.

The number of error events determined in steps d), g) and j) stored in error counters N_high, N_mid and N_low shall not exceed the error event limit as defined in Table 21.12a-3 for each of the error counters.

Table 21.12a-3: Test criteria and error limits for MEAN_BEP_32-QAM

Range

Specified

error limit

Tested

error limit

Number of

test samples

Error event limit

High

10 %

12.2 %

1640

200

Mid

10 %

12.2 %

1640

200

Low

10 %

12.2 %

1640

200

21.12a.5.2 Statistical test with early pass / fail decision

Specific details on statistical testing of performance are defined in Annex 7.

The calculation of the error rate for this test shall be done according to the values specified in tables 21.12a-4.

Table 21.12a-4: Statistical error limits for MEAN_BEP_32-QAM

Range

Block
per s

Org. error rate requirement

Derived test limit

Target number of samples

Target test time /s
(Note)

Target test time /hh:mm:ss

High

50

0,122

0,150548

2292

6875

01:54:35

Mid

50

0,122

0,150548

2292

6875

01:54:35

Low

50

0,122

0,150548

2292

6875

01:54:35

Note: Test time is based on the calculation that only every 150th radio block is used for error calculation.

21.13 AQPSK_MEAN_BEP measurement for VAMOS I/II/III

In order to have a testing performance corresponding to that in clause 14 for high error rates, the multiplication factor of the tested error rate with respect to the specified error rate have been increased. The following figures have been used (static propagation conditions):

Specified error rate

Multiplication factor

Min. error events

 25 %

1,22

200

30 – 40 %

1,15

300

> 40 %

1,1

400

21.13.1 Definition

The MS must be capable of measuring the MEAN_BEP parameters under static channel conditions, which is specified in terms of bit error probability (BEP) before channel decoding averaged over the four bursts of a Speech frame and then filtered for the measurement report. The MS has to map this filtered BEP into MEAN_BEP values in the table “MEAN_BEP mapping and accuracy for AQPSK (for VAMOS I , VAMOS II and VAMOS III MS) ” in sub clause 8.2.5 of 3GPP TS 45.008. The accuracy requirements in this table apply for static channel conditions for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS.

21.13.2 Conformance requirement3GPP TS 45.008 subclause 8.2.5

The mapping of the MEAN_BEP to the equivalent BEP and the accuracies to which an MS shall be capable of estimating the quality parameters under static channel conditions are given in the following tables for GMSK, 8-PSK and AQPSK respectively. The accuracy requirements below apply for sensitivity limited operation for signal levels above the reference sensitivity level for the type of MS, assuming no changes in transmitted downlink power. In A/Gb mode, the requirements apply for full rate TCH, E-TCH and O-TCH (no DTX). Similarly in Iu mode, the requirements apply to DBPSCH/F (no DTX). The estimated values are averaged (cf. subclause 8.2.3.2) over the reporting period of length 104 TDMA frames (480 ms). Furthermore, in both A/Gb mode and Iu mode, different requirements are given for EGPRS, in which case filtering according to subclause 10.2.3.2.1 with forgetting factor of 0.03 is assumed. The requirements for VAMOS mode shall apply for values of SCPIR from -4 dB to +4 dB for VAMOS I and for values of SCPIR from -10 dB to +10 dB for VAMOS II and VAMOS III.

MEAN_BEP mapping and accuracy for AQPSK (for VAMOS I, VAMOS II and VAMOS III MS)

MEAN_BEP

Range of
log10(actual BEP)

Expected MEAN_BEP
interval

Probability that the expected MEAN_BEP is reported shall not be lower than:

see NOTE *)

MEAN_BEP_0

> -0.60

[MEAN_BEP_0/1/2]

[80 %]

MEAN_BEP_1

-0.70 — -0.60

[MEAN_BEP_1/0/2/3/4]

[80 %]

MEAN_BEP_2

-0.80 — -0.70

[MEAN_BEP_2/1/3/4/5]

[70 %]

MEAN_BEP_3

-0.90 — -0.80

[MEAN_BEP_3/2/4/5]

[70 %]

MEAN_BEP_4

-1.00 — -0.90

[MEAN_BEP_4/3/5/6]

[70 %]

MEAN_BEP_5

-1.10 — -1.00

[MEAN_BEP_5/3/4/6/7]

[70 %]

MEAN_BEP_6

-1.20 — -1.10

[MEAN_BEP_6/4/5/7/8]

[70 %]

MEAN_BEP_7

-1.30 — -1.20

[MEAN_BEP_7/5/6/8/9]

[70 %]

MEAN_BEP_8

-1.40 — -1.30

[MEAN_BEP_8/5/6/7/9/10]

[70 %]

MEAN_BEP_9

-1.50 — -1.40

[MEAN_BEP_9/6/7/8/10/11]

[70 %]

MEAN_BEP_10

-1.60 — -1.50

[MEAN_BEP_10/7/8/9/11/12]

[65 %]

MEAN_BEP_11

-1.70 — -1.60

[MEAN_BEP_11/8/9/10/12/13]

[65 %]

MEAN_BEP_12

-1.80 — -1.70

[MEAN_BEP_12/9/10/11/13/14]

[65 %]

MEAN_BEP_13

-1.90 — -1.80

[MEAN_BEP_13/10/11/12/14/15]

[65 %]

MEAN_BEP_14

-2.00 — -1.90

[MEAN_BEP_14/11/12/13/15/16]

[65 %]

MEAN_BEP_15

-2.10 — -2.00

[MEAN_BEP_15/11/12/13/14/16/17]

[70 %]

MEAN_BEP_16

-2.20 — -2.10

[MEAN_BEP_16/13/14/15/17/18]

[70 %]

MEAN_BEP_17

-2.30 — -2.20

[MEAN_BEP_17/14/15/16/18/19]

[70 %]

MEAN_BEP_18

-2.40 — -2.30

[MEAN_BEP_18/14/15/16/17/19/20]

[70 %]

MEAN_BEP_19

-2.50 — -2.40

[MEAN_BEP_19/15/16/17/18/20/21]

[70 %]

MEAN_BEP_20

-2.60 — -2.50

[MEAN_BEP_20/16/17/18/19/21/22]

[70 %]

MEAN_BEP_21

-2.70 — -2.60

[MEAN_BEP_21/17/18/19/20/22/23]

[70 %]

MEAN_BEP_22

-2.80 — -2.70

[MEAN_BEP_22/18/19/20/21/23/24]

[70 %]

MEAN_BEP_23

-2.90 — -2.80

[MEAN_BEP_23/19/20/21/22/24/25]

[70 %]

MEAN_BEP_24

-3.00 — -2.90

[MEAN_BEP_24/20/21/22/23/25/26]

[70 %]

MEAN_BEP_25

-3.10 — -3.00

[MEAN_BEP_25/21/22/23/24/26/27/28]

[65 %]

MEAN_BEP_26

-3.20 — -3.10

[MEAN_BEP_26/22/23/24/25/27/28/29]

[65 %]

MEAN_BEP_27

-3.30 — -3.20

[MEAN_BEP_27/23/24/25/26/28/29/30]

[65 %]

MEAN_BEP_28

-3.40 — -3.30

[MEAN_BEP_28/23/24/25/26/27/29/30/31]

[65 %]

MEAN_BEP_29

-3.50 — -3.40

[MEAN_BEP_29/23/24/25/26/27/28/30/31]

[80 %]

MEAN_BEP_30

-3.60 — -3.50

[MEAN_BEP_30/24/25/26/27/28/29/31]

[80 %]

MEAN_BEP_31

< -3.60

[MEAN_BEP_31/27/28/29/30]

[80 %]

NOTE *) The values in this column apply in A/Gb mode for full rate TCH (no DTX) in VAMOS mode.

21.13.3 Test purpose

To verify for VAMOS I/II/III, under static channel conditions, that the BEP is measured and mapped to the MEAN_BEP values defined in subclause 8.2.5 of 3GPP TS 45.008 by the MS in a manner that can be related to an equivalent average BEP before channel decoding. The probability that the correct MEAN_BEP value is reported shall meet the values in the table “MEAN_BEP mapping and accuracy for AQPSK (for VAMOS I, VAMOS II and VAMOS III MS)” in sub clause 8.2.5 of 3GPP TS 45.008.

21.13.4 Method of test

The SS compares the long term BER average calculated by counting bit errors determined in loop-back type C mode over a SACCH multi frame period to a set of related MEAN_BEP values.

The MEAN_BEP values correspond to the same MS received bits that are looped-back for calculation of the long-term BER average (one-phase approach). For acquiring these MEAN_BEP values, MS will report MEAN BEP in Enhanced Measurement Report for every SACCH multi-frame period.

The testing of BEP accuracy is performed at 4 sample points inside the ranges given in table 21.13.4-1.

Table 21.13.4-1: MEAN_BEP AQPSK test intervals

Interval

Range of log10(actual BEP)

Range of
actual BEP [%]

Range of expected MEAN_BEP

High

< -3.6

< 0.025

31

Mid_High

-3.2…-2.8

0.0631…0.158

23-26

Mid_low

-2.7 … -2.1

0.2 … 0.79

16 … 21

Low

-2.0 … -1.5

1.0 … 3.16

10 … 14

NOTE 1: The above range of expected MEAN_BEP for intervals Mid and Low have been defined in a way that the accuracy requirements are the same for a given range.

21.13.4.1 Initial conditions

The SS transmits a Standard Test Signal C1 (AQPSK) (wanted signal) on the active VAMOS subchannel (subchannel 2) using trainings sequence 5 from TSC set 2 on the TCH channel using the VAMOS TCH/AFS 12.2 at the nominal frequency of the receiver and with a level of –82 dBm and the other VAMOS subchannel (subchannel 1) uses trainings sequences 5 from TSC set 1. The SCPIR_DL is set to +4 dB.

The SS transmits a white noise signal as an interferer (random signal) known as unwanted signal. The unwanted signal is the standard test signal I3 as specified in TS 51.010 annex 5.2, on the same nominal frequency. Both wanted and unwanted signal contains static propagation characteristics.

RADIO_LINK_TIMEOUT is set to maximum.

Specific PICS Statements:

– VAMOS I supported (TSPC_VAMOS_Type1)

– VAMOS II supported (TSPC_VAMOS_Type2)

– VAMOS III supported (TSPC_VAMOS_Type3)

For MS indicating VAMOS III support, connect the SS to the MS antenna connectors according to Annex A1.1.6.2.

21.13.4.2 Procedure

a) The unwanted signal is switched off and the SS commands the MS to create traffic channel loop back signalling Type C: ON

The SS sends 6000 speech frames to the MS. During this period for 250 times, the MS will report MEAN BEP in Enhanced Measurement Report for every SACCH multi-frame period. For each reported Mean_BEP value the SS calculates (updates) the average BER of all looped back bits received until the previous SACCH multi frame containing the MEAN_BEP value. The SS commands the MS traffic channel loop back signalling Type C: OFF.

b) The SS counts the number of MEAN_BEP values outside the expected MEAN_BEP interval corresponding to MEAN_BEP_31 and stores the result in error counter N_high. The BER calculation is reset.

c) The SS commands the MS traffic channel loop back signalling Type C: ON, switches the noise signal on and raises the level of the unwanted signal until the BER of the looped back data is between 0.0631% and 0.158% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_23 and MEAN_BEP_26, respectively. During the measurements the level of the unwanted signal shall be kept constant.

d) The SS repeats the procedure described in step a.

e) The SS determines the expected MEAN_BEP interval corresponding to the each BER using table “MEAN_BEP mapping and accuracy for AQPSK (for VAMOS I, VAMOS II and VAMOS III MS)” in subclause 8.2.5 of 3GPP TS 45.008. The SS determines the number of MEAN_BEP values outside of these intervals and stores the result in error counter N_mid_high. The BER calculation is reset.

f) The SS commands the MS traffic channel loop back signalling Type C: ON, switches the noise signal on and raises the level of the unwanted signal until the BER of the looped back data is between 0.2% and 0.79% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_21 and MEAN_BEP_16, respectively. During the measurements the level of the unwanted signal shall be kept constant.

g) The SS repeats the procedure described in step a.

h) The SS determines the expected MEAN_BEP interval corresponding to the each BER using table “MEAN_BEP mapping and accuracy for AQPSK (for VAMOS I, VAMOS II and VAMOS III MS)” in subclause 8.2.5 of 3GPP TS 45.008. The SS determines the number of MEAN_BEP values outside of these intervals and stores the result in error counter N_mid_low. The BER calculation is reset.

i) The SS commands the MS traffic channel loop back signalling Type C: ON, switches the noise signal on and raises the level of the unwanted signal until the BER of the looped back data is between 1.0% and 3.16% (calculated based on at least 100 bit errors), corresponding to the inner limits of MEAN_BEP_14 and MEAN_BEP_10, respectively. During the measurements the level of the unwanted signal shall be kept constant.

j) The SS repeats the procedure described in step a).

k) The SS determines the expected MEAN_BEP interval corresponding to each BER of all looped back bits using table “MEAN_BEP mapping and accuracy for AQPSK (for VAMOS I, VAMOS II and VAMOS III MS)” in subclause 8.2.5 of 3GPP TS 45.008. The SS determines the number of MEAN_BEP values outside of these intervals and stores the result in error counter N_low.

l) The SS repeats step a) to k) with SCPIR_DL values 0 dB and -4 dB.

m) If the MS signals VAMOS II or VAMOS III support step a) to k) shall be repeated with SCPIR_DL values -8 dB and -10 dB.

Expected maximum test time for statistical error limit tests: 300 min.

21.13.5 Test requirements

Testing of the conformance requirement can be done either with fixed minimum number of samples or based on the statistical test method that could lead to an early pass/fail decision with test time significantly reduced for a MS not on the limit.

21.13.5.1 Fixed limit test with minimum number of samples

The fixed testing of the conformance requirement is done using the minimum number of samples and the limit error rate given in table 21.13.5-1.

The number of error events determined in steps b), e) and h) stored in error counters N_high, N_mid_high, N_mid_low and N_low shall not exceed the error event limit as defined in Table 21.13.5-1 for each of the error counters.

Table 21.13.5-1: Test criteria and error limits for MEAN_BEP_AQPSK

Range

Specified

error limit

Tested

error limit

Number of

test samples

Error event limit

High

10 %

12.2 %

6000

[200]

Mid_high

10 %

12.2 %

6000

[200]

Mid_low

10 %

12.2 %

6000

[200]

Low

10 %

12.2 %

6000

[200]

21.13.5.2 Statistical test with early pass / fail decision

Specific details on statistical testing of performance are defined in Annex 7.

The calculation of the error rate for this test shall be done according to the values specified in table 21.13.5-2.

Table 21.13.5-2: Statistical error limits for MEAN_BEP_AQPSK

Range

Block
per s

Org. error rate requirement

Derived test limit

Target number of samples

Target test time /s
(Note)

Target test time /hh:mm:ss

High

50

0,122

0,150548

6000

6875

01:54:35

Mid_high

50

0,122

0,150548

6000

6875

01:54:35

Mid_low

50

0,122

0,150548

6000

6875

01:54:35

Low

50

0,122

0,150548

6000

6875

01:54:35