14.19 DARP Phase II Speech bearer tests

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

14.19.1 TCH/FS

14.19.1.1 DTS-1

14.19.1.1.1 Definition

DARP Phase II, also referred as Mobile Station Receiver Diversity is a feature where the MS uses two receive antennas in order to improve performance under non-interfering and interfering scenarios.

The DARP Phase II reference test scenarios define a set of interfering signals and corresponding performance limits. These tests are a measure of the capability of the DARP Phase II receiver to receive a wanted modulated signal without exceeding a given degradation due to the presence of these specific unwanted modulated signals.

14.19.1.1.2 Conformance requirement

1. MS indicating support for Downlink Advanced Receiver Performance – phase II (see 3GPP TS 24.008) shall fulfil the requirements in table 2q for the test scenarios defined in annex N. The reference performance shall be:

– For speech channels (TCH/FS, TCH/AFSx, TCH/AHSx) FER:  1 %

2. The values in table 2q are given as the C/I1 ratio, where C is the power level of the wanted signal and I1 is the power level of the dominant co-channel interferer (Co-channel 1, see annex N).
In addition for speech channels the residual class Ib BER and residual class II BER performance shall not exceed the specified values in table 2q at the corresponding C/I1.

The performance requirements for GSM 400 and GSM 700 systems are as for GSM 900 in table 2q, except that the GSM 400 MS speed is doubled from that of GSM 900, e.g. TU50 becomes TU100, and the GSM 700 MS speed is increased by a factor of 1.2, e.g. TU50 becomes TU60.3GPP TS 45.005, subclause 6.3

For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.

3GPP TS 45.005; sub clause 2

14.19.1.1.3 Test purpose

To verify that the MS does not exceed the first conformance requirement for TCH/FS under propagation condition TUhigh with an allowance for the statistical significance of the test.

To verify that the MS does not exceed the second conformance requirement for TCH/FS under propagation condition TUhigh with an allowance for the statistical significance of the test.

14.19.1.1.4 Method of test

14.19.1.1.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a TCH/FS with an ARFCN in the mid ARFCN range, power control level set to maximum power. RADIO_LINK_TIMEOUT is set to maximum.

The SS transmits Standard Test Signal C1 on the traffic channel (wanted signal).

The SS commands the MS to create the traffic channel loop back, signalling erased frames (subclause 36).

14.19.1.1.4.2 Procedure

a) In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal).

The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. The interfering signal level is set to -70 dBm.

The fading characteristic of the wanted and the interfering signal is TUHigh. Antenna correlation is 0 and antenna gain imbalance is 0dB.

b) The SS sets the level of the wanted signal to that indicated by Clev in table 14.19.1-2 or 14.19.1-3.

c) The SS compares the modulation of the signal that it sends to the MS with the signal which is looped back from the receiver after demodulation and decoding, and checks the frame erasure indication.

d) The SS determines the number of residual bit error events for the bits of the class Ib, by examining at least the minimum number of samples of consecutive bits of class Ib. Bits are only taken from those frames not signalled as erased.

e) The SS also determines the number of residual bit error events for the bits of the class II, by examining at least the minimum number of samples of consecutive bits of class II. Bits are only taken from those frames not signalled as erased.

f) The SS also determines the frame erasure events by examining at least the minimum number of samples of consecutive frames and assuming a frame is received successfully it is not signalled as erased.

Maximum/Minimum Duration of Test

Maximum: 10 minutes (GSM 400, GSM700, GSM850, GSM900), 10 minutes (DCS1800, PCS1900).

Minimum: 4 minutes (GSM 400, GSM700, GSM850, GSM900), 2 minutes (DCS1800, PCS1900).

14.19.1.1.5 Test requirements

Testing should be performed using statistical methods that lead to an early pass/fail decision with test time significantly reduced for MS with FER/BER not on the limit.

For more information on statistical testing of BER/BLER performance, especially the definition of limit lines refer to Annex 7 (A7.1.3.2)

Wrong decision risk F for one single error rate test:

Fpass   =   Ffail   =   F and F   =   0.2%

Wrong decision probability D per test step:

Dpass   =   Dfail   =   D and D   =   0.0085%

Parameters for limit lines:

1. D =  0.000085 wrong decision probability per test step.

2. M =   1.5 bad DUT factor

3. ne number of (error) events. This parameter is the x‑ordinate in figure Annex 7 figure A7.1.3.1.

4. ns number of samples. The error rate is calculated from ne and ns.

Limit checking

Before limit checking is valid the minimum test time due to fading needs to be considered:

Testing under multipath and interference conditions requires that at least 990 wavelengths are crossed with the speed given in the fading profile. This leads to a minimum test time depending on the frequency range. No early pass/fail decision is allowed until the minimum test time due to fading has elapsed.

Table 14.19.1-1: Minimum test times due to TU high fading conditions

Full Rate 50 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,35

0,33

0,17

0,16

m

min test time

201

190

95

90

s

0:03:21

0:03:10

0:01:35

0:01:30

hh.mm:ss

Full Rate 60 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,43

m

min test time

204

s

0:03:24

hh.mm:ss

Full Rate 100 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,75

m

min test time

214

s

0:3:34

hh.mm:ss

If the minimum test time due to multipath conditions exceeds the target test time, then the test runs for the minimum test time due to multipath conditions and the decision is made by comparing the result with the “derived test limit”. In this case early pass/fail decisions are obsolete.

If the target test time exceeds the minimum test time due to multipath conditions early pass/fail decisions can be headed for in order to accelerate test execution.

For an early decision a minimum number of (error) events is necessary.

For an early pass decision ne   ≥   1 (inclusive artificial error)

For an early fail decision ne   ≥   7

When the target test time has been reached the test is finished and a pass/fail decision can be made.

The error rate measured in this test shall be tested according to the values given in tables 14.19.1-2 or 14.19.1-3.

Table 14.19.1-2: Statistical test limits for bands other than DCS 1800 and PCS 1900 TCH/FS DARP Phase II DTS-1

DTS-1

0.8 to 0.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

FS

Frames

-82

50

0,010000

0,0123400

27958

560

00:09:20

ClassIb

(as frames)

9100

0,000600

0,0007404

465965

51

00:00:51

Class II

(as frames)

3900

0,053700

0,0662658

5207

2

00:00:02

Table 14.19.1-3: Statistical test limits for DCS 1 800 and PCS 1 900 TCH/FS DARP Phase II DTS-1

DTS-1

1.8 to 1.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

FS

Frames

-81.5

50

0,010000

0,0123400

27958

560

00:09:20

ClassIb

(as frames)

9100

0,000800

0,0009872

349474

39

00:00:39

Class II

(as frames)

3900

0,058600

0,0723124

4771

2

00:00:02

14.19.2 TCH/AFS

14.19.2.1 DTS-1

14.19.2.1.1 Definition

DARP Phase II, also referred as Mobile Station Receiver Diversity is a feature where the MS uses two receive antennas in order to improve performance under non-interfering and interfering scenarios.

The DARP Phase II reference test scenarios define a set of interfering signals and corresponding performance limits. These tests are a measure of the capability of the DARP Phase II receiver to receive a wanted modulated signal without exceeding a given degradation due to the presence of these specific unwanted modulated signals.

14.19.2.1.2 Conformance requirement

1. MS indicating support for Downlink Advanced Receiver Performance – phase II (see 3GPP TS 24.008) shall fulfil the requirements in table 2q for the test scenarios defined in annex N. The reference performance shall be:

– For speech channels (TCH/FS, TCH/AFSx, TCH/AHSx) FER:  1 %

2. The values in table 2q are given as the C/I1 ratio, where C is the power level of the wanted signal and I1 is the power level of the dominant co-channel interferer (Co-channel 1, see annex N).
In addition for speech channels the residual class Ib BER and residual class II BER performance shall not exceed the specified values in table 2q at the corresponding C/I1.

The performance requirements for GSM 400 and GSM 700 systems are as for GSM 900 in table 2q, except that the GSM 400 MS speed is doubled from that of GSM 900, e.g. TU50 becomes TU100, and the GSM 700 MS speed is increased by a factor of 1.2, e.g. TU50 becomes TU60.

3GPP TS 45.005, subclause 6.3

For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.

3GPP TS 45.005; sub clause 2

14.19.2.1.3 Test purpose

To verify that the MS does not exceed the first conformance requirement for TCH/AFS under propagation condition TUhigh with an allowance for the statistical significance of the test.

To verify that the MS does not exceed the second conformance requirement for TCH/AFS under propagation condition TUhigh with an allowance for the statistical significance of the test for class Ib BER.

14.19.2.1.4 Method of test

14.19.2.1.4.1 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. RADIO_LINK_TIMEOUT is set to maximum.

The multirate configuration indicates the use of a codec set limited to 12,2 kbit/s.

The SS transmits Standard Test Signal C1 on the traffic channel (wanted signal), with training sequence code (TSC) = 0.

The SS commands the MS to create the traffic channel loop back, signalling erased frames (subclause 36).

14.19.2.1.4.2 Procedure

a) In addition to the wanted signal, the SS produces an independent, uncorrelated interfering signal, Standard Test Signal I1 (unwanted signal).

The unwanted signal is continuous and has no fixed relationship with the bit transitions of the wanted signal. The interfering signal level is set to -70 dBm.

The fading characteristic of the wanted and the interfering signal is TUHigh. Antenna correlation is 0 and antenna gain imbalance is 0dB.

b) The SS sets the level of the wanted signal to that indicated by Clev in table 14.19.2-2 or 14.19.2-3.

c) The SS compares the modulation of the signal that it sends to the MS with the signal which is looped back from the receiver after demodulation and decoding, and checks the frame erasure indication.

d) The SS determines the number of residual bit error events for the bits of the class Ib, by examining at least the minimum number of samples of consecutive bits of class Ib. Bits are only taken from those frames not signalled as erased.

e) The SS also determines the frame erasure events by examining at least the minimum number of samples of consecutive frames and assuming a frame is received successfully it is not signalled as erased.

f) The SS uses a Channel Mode Modify procedure to change the active codec set to 7,4 kbit/s and steps b) to e) are repeated.

g) The SS uses a Channel Mode Modify procedure to change the active codec set to 5,9 kbit/s and steps b) to e) are repeated.

Maximum/Minimum Duration of Test

Maximum: 28 minutes (GSM 400, GSM700, GSM850, GSM900), 28 minutes (DCS1800, PCS1900).

Minimum: 11 minutes (GSM 400, GSM700, GSM850, GSM900), 5 minutes (DCS1800, PCS1900).

14.19.2.1.5 Test requirements

Testing should be performed using statistical methods that lead to an early pass/fail decision with test time significantly reduced for MS with FER/BER not on the limit.

For more information on statistical testing of BER/BLER performance, especially the definition of limit lines refer to Annex 7.

Wrong decision risk F for one single error rate test:

Fpass   =   Ffail   =   F and F   =   0.2%

Wrong decision probability D per test step:

Dpass   =   Dfail   =   D and D   =   0.0085%

Parameters for limit lines:

1. D =  0.000085 wrong decision probability per test step.

2. M =   1.5 bad DUT factor

3. ne number of (error) events. This parameter is the x‑ordinate in figure A7.1.3.2.

4. ns number of samples. The error rate is calculated from ne and ns.

Limit checking

Before limit checking is valid the minimum test time due to fading needs to be considered:

Testing under multipath and interference conditions requires that at least 990 wavelengths are crossed with the speed given in the fading profile. This leads to a minimum test time depending on the frequency range. No early pass/fail decision is allowed until the minimum test time due to fading has elapsed.

Table 14.19.2-1: Minimum test times due to TU high fading conditions

Full Rate 50 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,35

0,33

0,17

0,16

m

min test time

201

190

95

90

s

0:03:21

0:03:10

0:01:35

0:01:30

hh.mm:ss

Full Rate 60 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,43

m

min test time

204

s

0:03:24

hh.mm:ss

Full Rate 100 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,75

m

min test time

214

s

0:3:34

hh.mm:ss

If the minimum test time due to multipath conditions exceeds the target test time, then the test runs for the minimum test time due to multipath conditions and the decision is made by comparing the result with the “derived test limit”. In this case early pass/fail decisions are obsolete.

If the target test time exceeds the minimum test time due to multipath conditions early pass/fail decisions can be headed for in order to accelerate test execution.

For an early decision a minimum number of (error) events is necessary.

For an early pass decision ne   ≥   1 (inclusive artificial error)

For an early fail decision ne   ≥   7

When the target test time has been reached the test is finished and a pass/fail decision can be made.

The error rate measured in this test shall be tested according to the values given in tables 14-63 or 14-64.

Table 14.19.2-2: Statistical test limits for bands other than DCS 1800 and PCS 1900 TCH/AFS DARP Phase II DTS-1

DTS-1

0.8 to 0.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

AFS 12.2

Frames

-81.0

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

8150

0,006900

0,0085146

40519

5

00:00:05

AFS 7.4

Frames

-83.5

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

4350

0,002100

0,0025914

133133

31

00:00:31

AFS 5.9

Frames

-85.0

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

3150

0,001700

0,0020978

164459

53

00:00:53

Table 14.19.2-3: Statistical test limits for DCS 1800 and PCS 1900 TCH/AFS DARP Phase II DTS-1

DTS-1

1.8 to 1.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

AFS 12.2

Frames

-80.5

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

8150

0,008400

0,0103656

33284

5

00:00:05

AFS 7.4

Frames

-83.5

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

4350

0,001800

0,0022212

155322

36

00:00:36

AFS 5.9

Frames

-84.5

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

3150

0,002000

0,002468

139790

45

00:00:45

14.19.2.2 DTS-2/5

14.19.2.2.1 Definition

DARP Phase II, also referred as Mobile Station Receiver Diversity is a feature where the MS uses two receive antennas in order to improve performance under non-interfering and interfering scenarios.

The DARP Phase II reference test scenarios define a set of interfering signals and corresponding performance limits. These tests are a measure of the capability of the DARP Phase II receiver to receive a wanted modulated signal without exceeding a given degradation due to the presence of these specific unwanted modulated signals.

14.19.2.2.2 Conformance requirement

1. MS indicating support for Downlink Advanced Receiver Performance – phase II (see 3GPP TS 24.008) shall fulfil the requirements in table 2q for the test scenarios defined in annex N. The reference performance shall be:

– For speech channels (TCH/FS, TCH/AFSx, TCH/AHSx) FER:  1 %

2. The values in table 2q are given as the C/I1 ratio, where C is the power level of the wanted signal and I1 is the power level of the dominant co-channel interferer (Co-channel 1, see annex N).
In addition for speech channels the residual class Ib BER and residual class II BER performance shall not exceed the specified values in table 2q at the corresponding C/I1.

The performance requirements for GSM 400 and GSM 700 systems are as for GSM 900 in table 2q, except that the GSM 400 MS speed is doubled from that of GSM 900, e.g. TU50 becomes TU100, and the GSM 700 MS speed is increased by a factor of 1.2, e.g. TU50 becomes TU60.

3GPP TS 45.005, subclause 6.3

For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.

3GPP TS 45.005; sub clause 2

14.19.2.2.3 Test purpose

To verify that the MS does not exceed the first conformance requirement for TCH/AFS under propagation condition TUhigh with an allowance for the statistical significance of the test.

To verify that the MS does not exceed the second conformance requirement for TCH/AFS under propagation condition TUhigh with an allowance for the statistical significance of the test.

14.19.2.2.4 Method of test

14.19.2.2.4.1 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. RADIO_LINK_TIMEOUT is set to maximum.

The multirate configuration indicates the use of a codec set limited to 7,4 kbit/s.

The SS transmits Standard Test Signal C1 on the traffic channel (wanted signal), with training sequence code (TSC) = 0.

The SS commands the MS to create the traffic channel loop back, signalling erased frames (subclause 36).

14.19.2.2.4.2 Procedure

a) In addition to the wanted signal, the SS produces a further four interfering signals to produce scenario DTS-2.

A signal of type I1 using the same ARFCN as C1, with fading characteristics of TUHigh, and signal level of -70 dBm.

A signal of type I1 using the same ARFCN as C1, with fading characteristics of TUHigh, and signal level of -80 dBm.

A signal of type I1 using an ARFCN one higher than C1, with fading characteristics of TUHigh, and signal level of -67 dBm.

A signal of type I3 using the same ARFCN as C1, and signal level of -87 dBm.

b) The SS sets the level of the wanted signal to that indicated by Clev in table 14.19.2.2-2 or 14.19.2.2-3, and sets the fading characteristic of the signal to TUHigh. Antenna correlation is set to 0 and antenna gain imbalance is set to 0dB.

c) The SS compares the modulation of the signal that it sends to the MS with the signal which is looped back from the receiver after demodulation and decoding, and checks the frame erasure indication.

d) The SS determines the number of residual bit error events for the bits of the class Ib, by examining at least the minimum number of samples of consecutive bits of class Ib. Bits are only taken from those frames not signalled as erased.

e) The SS also determines the frame erasure events by examining at least the minimum number of samples of consecutive frames and assuming a frame is received successfully it is not signalled as erased.

f) The SS uses a Channel Mode Modify procedure to change the active codec set to 5,9 kbit/s and steps b) to e) are repeated.

g) The SS discontinues all interfering signals.

h) In addition to the wanted signal, the SS produces a further four interfering signals to produce scenario DTS-5.

A signal of type I5 using the same ARFCN as C1, with fading characteristics of TUHigh, and signal level of -67 dBm.

A signal of type I1 using the same ARFCN as C1, with fading characteristics of TUHigh, and signal level of -80 dBm.

A signal of type I1 using an ARFCN one higher than C1, with fading characteristics of TUHigh, and signal level of -67 dBm.

A signal of type I3 using the same ARFCN as C1, and signal level of -87 dBm.

i) The SS uses a Channel Mode Modify procedure to change the active codec set to 12,2 kbit/s and steps b) to e) are repeated.

Maximum/Minimum Duration of Test

Maximum: 28 minutes (GSM 400, GSM700, GSM850, GSM900), 28 minutes (DCS1800, PCS1900).

Minimum: 10 minutes (GSM 400, GSM700, GSM850, GSM900), 5 minutes (DCS1800, PCS1900).

14.19.2.2.5 Test requirements

Testing should be performed using statistical methods that lead to an early pass/fail decision with test time significantly reduced for MS with FER/BER not on the limit.

For more information on statistical testing of BER/BLER performance, especially the definition of limit lines refer to Annex 7.

Wrong decision risk F for one single error rate test:

Fpass   =   Ffail   =   F and F   =   0.2%

Wrong decision probability D per test step:

Dpass   =   Dfail   =   D and D   =   0.0085%

Parameters for limit lines:

1. D =  0.000085 wrong decision probability per test step.

2. M =   1.5 bad DUT factor

3. ne number of (error) events. This parameter is the x‑ordinate in figure A7.1.3.1.

4. ns number of samples. The error rate is calculated from ne and ns.

Limit checking

Before limit checking is valid the minimum test time due to fading needs to be considered:

Testing under multipath and interference conditions requires that at least 990 wavelengths are crossed with the speed given in the fading profile. This leads to a minimum test time depending on the frequency range. No early pass/fail decision is allowed until the minimum test time due to fading has elapsed.

Table 14.19.2.2-1: Minimum test times due to TU 50 fading conditions

Full Rate 50 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,35

0,33

0,17

0,16

m

min test time

201

190

95

90

s

0:03:21

0:03:10

0:01:35

0:01:30

hh.mm:ss

Full Rate 60 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,43

m

min test time

204

s

0:03:24

hh.mm:ss

Full Rate 100 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,75

m

min test time

214

s

0:3:34

hh.mm:ss

If the minimum test time due to multipath conditions exceeds the target test time, then the test runs for the minimum test time due to multipath conditions and the decision is made by comparing the result with the “derived test limit”. In this case early pass/fail decisions are obsolete.

If the target test time exceeds the minimum test time due to multipath conditions early pass/fail decisions can be headed for in order to accelerate test execution.

For an early decision a minimum number of (error) events is necessary.

For an early pass decision ne   ≥   1 (inclusive artificial error)

For an early fail decision ne   ≥   7

When the target test time has been reached the test is finished and a pass/fail decision can be made.

The error rate measured in this test shall be tested according to the values given in tables 14.19.2.2-2 or 14.19.2.2-3.

Table 14.19.2.2-2: Statistical test limits for bands other than DCS 1800 and PCS 1900 TCH/AFS DARP Phase II DTS-2/5

DTS-2/5

0.8 to 0.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

AFS 7.4

DTS-2

Frames

-70

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

4350

0,001500

0,001851

186386

43

00:00:43

AFS 5.9

DTS-2

Frames

-71.5

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

3150

0,001600

0,0019744

174737

56

00:00:56

AFS 12.2

DTS-5

Frames

-67.5

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

8150

0,006700

0,0082678

41729

6

00:00:06

Table 14.19.2.2-3: Statistical test limits for DCS 1800 and PCS 1900 TCH/AFS DARP Phase II DTS-2/5

DTS-2/5

1.8 to 1.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

AFS 7.4

DTS-2

Frames

-71

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

4350

0,001800

0,0022212

155322

36

00:00:36

AFS 5.9

DTS-2

Frames

-72

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

3150

0,001800

0,0022212

155322

50

00:00:50

AFS 12.2

DTS-5

Frames

-68.5

50

0,010000

0,012340

27958

560

00:09:20

Class1b

(as frames)

8150

0,009400

0,0115996

29743

4

00:00:04

14.19.3 TCH/AHS

14.19.3.1 DTS-1

14.19.3.1.1 Definition

DARP Phase II, also referred as Mobile Station Receiver Diversity is a feature where the MS uses two receive antennas in order to improve performance under non-interfering and interfering scenarios.

The DARP Phase II reference test scenarios define a set of interfering signals and corresponding performance limits. These tests are a measure of the capability of the DARP Phase II receiver to receive a wanted modulated signal without exceeding a given degradation due to the presence of these specific unwanted modulated signals.

14.19.3.1.2 Conformance requirement

1. MS indicating support for Downlink Advanced Receiver Performance – phase II (see 3GPP TS 24.008) shall fulfil the requirements in table 2q for the test scenarios defined in annex N. The reference performance shall be:

– For speech channels (TCH/FS, TCH/AFSx, TCH/AHSx) FER:  1 %

2. The values in table 2q are given as the C/I1 ratio, where C is the power level of the wanted signal and I1 is the power level of the dominant co-channel interferer (Co-channel 1, see annex N).
In addition for speech channels the residual class Ib BER and residual class II BER performance shall not exceed the specified values in table 2q at the corresponding C/I1.

The performance requirements for GSM 400 and GSM 700 systems are as for GSM 900 in table 2q, except that the GSM 400 MS speed is doubled from that of GSM 900, e.g. TU50 becomes TU100, and the GSM 700 MS speed is increased by a factor of 1.2, e.g. TU50 becomes TU60.

3GPP TS 45.005, subclause 6.3

For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.

3GPP TS 45.005; sub clause 2

14.19.3.1.3 Test purpose

To verify that the MS does not exceed the first conformance requirement for TCH/AHS under propagation condition TUhigh with an allowance for the statistical significance of the test.

To verify that the MS does not exceed the second conformance requirement for TCH/AHS under propagation condition TUhigh with an allowance for the statistical significance of the test.

14.19.3.1.4 Method of test

14.19.3.1.4.1 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. RADIO_LINK_TIMEOUT is set to maximum.

The multirate configuration indicates the use of a codec set limited to 7,4 kbit/s.

The SS transmits Standard Test Signal C1 on the traffic channel (wanted signal), with training sequence code (TSC) = 0.

The SS commands the MS to create the traffic channel loop back, signalling erased frames (subclause 36).

14.19.3.1.4.2 Procedure

a) In addition to the wanted signal, the SS produces one further interfering signal to produce scenario DTS-1.

A signal of type I1 using the same ARFCN as C1, with fading characteristics of TUHigh, and signal level of -70 dBm.

The fading characteristic of the wanted signal is TUHigh. Antenna correlation is 0 and antenna gain imbalance is 0dB.

b) The SS sets the level of the wanted signal to that indicated by Clev in table 14.19.3.1-2 or 14.19.3.1-3.

c) The SS compares the modulation of the signal that it sends to the MS with the signal which is looped back from the receiver after demodulation and decoding, and checks the frame erasure indication.

d) The SS determines the number of residual bit error events for the bits of the class Ib and II, by examining at least the minimum number of samples of consecutive bits of class Ib and II. Bits are only taken from those frames not signalled as erased.

e) The SS also determines the frame erasure events by examining at least the minimum number of samples of consecutive frames and assuming a frame is received successfully if it is not signalled as erased.

f) The SS uses a Channel Mode Modify procedure to change the active codec set to 5,9 kbit/s and steps b) to e) are repeated.

Maximum/Minimum Duration of Test

Maximum: 19 minutes (GSM 400, GSM700, GSM850, GSM900), 19 minutes (DCS1800, PCS1900).

Minimum: 14 minutes (GSM 400, GSM700, GSM850, GSM900), 7 minutes (DCS1800, PCS1900).

14.19.3.1.5 Test requirements

Testing should be performed using statistical methods that lead to an early pass/fail decision with test time significantly reduced for MS with FER/BER not on the limit.

For more information on statistical testing of BER/BLER performance, especially the definition of limit lines refer to Annex 7.

Wrong decision risk F for one single error rate test:

Fpass   =   Ffail   =   F and F   =   0.2%

Wrong decision probability D per test step:

Dpass   =   Dfail   =   D and D   =   0.0085%

Parameters for limit lines:

1. D =  0.000085 wrong decision probability per test step.

2. M =   1.5 bad DUT factor

3. ne number of (error) events. This parameter is the x‑ordinate in figure A7.1.3.2.

4. ns number of samples. The error rate is calculated from ne and ns.

Limit checking

Before limit checking is valid the minimum test time due to fading needs to be considered:

Testing under multipath and interference conditions requires that at least 990 wavelengths are crossed with the speed given in the fading profile. This leads to a minimum test time depending on the frequency range. No early pass/fail decision is allowed until the minimum test time due to fading has elapsed.

Table 14.19.3.1-1: Minimum test times due to TU high fading conditions

Half Rate 50 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,35

0,33

0,17

0,16

m

min test time

403

380

190

180

s

0:06:43

0:06:20

0:03:10

0:03:00

hh.mm:ss

Half Rate 60 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,43

m

min test time

408

s

0:06:48

hh.mm:ss

Half Rate 100 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,75

m

min test time

428

s

0:07:08

hh.mm:ss

If the minimum test time due to multipath conditions exceeds the target test time, then the test runs for the minimum test time due to multipath conditions and the decision is made by comparing the result with the “derived test limit”. In this case early pass/fail decisions are obsolete.

If the target test time exceeds the minimum test time due to multipath conditions early pass/fail decisions can be headed for in order to accelerate test execution.

For an early decision a minimum number of (error) events is necessary.

For an early pass decision ne   ≥   1 (inclusive artificial error)

For an early fail decision ne   ≥   7

When the target test time has been reached the test is finished and a pass/fail decision can be made.

The error rate measured in this test shall be tested according to the values given in tables 14.19.3.1-2 or 14.19.3.1-3.

Table 14.19.3.1-2: Statistical test limits for bands other than DCS 1800 and PCS 1900 TCH/AHS DARP Phase II DTS-1

DTS-1

0.8 to 0.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

AHS 7.4

Frames

-77.5

50

0.010000

0.012340

27959

560

0:09:20

Class1b

(as frames)

2950

0.004000

0,004936

69895

24

0:00:24

Class II

(as frames)

1400

0.018800

0,0231992

14872

11

0:00:11

AHS 5.9

Frames

-79.5

50

0.010000

0.012340

27959

560

0:09:20

Class1b

(as frames)

2350

0.005100

0,0062934

54820

24

0:00:24

Class II

(as frames)

800

0.032700

0,0403518

8550

11

0:00:11

Table 14.19.3.1-3: Statistical test limits for DCS 1 800 and PCS 1 900 TCH/AHS DARP Phase II DTS-1

DTS-1

1.8 to 1.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

AHS 7.4

Frames

-77.0

50

0.010000

0.012340

27959

560

0:09:20

Class1b

(as frames)

2950

0.005700

0,0070338

49049

17

0:00:17

Class II

(as frames)

1400

0.021100

0,0260374

13251

10

0:00:10

AHS 5.9

Frames

-79.0

50

0.010000

0.012340

27959

560

0:09:20

Class1b

(as frames)

2350

0.006200

0,0076508

45094

20

0:00:20

Class II

(as frames)

800

0.035600

0,0439304

7854

10

0:00:10

14.19.3.2 DTS-2

14.19.3.2.1 Definition

DARP Phase II, also referred as Mobile Station Receiver Diversity is a feature where the MS uses two receive antennas in order to improve performance under non-interfering and interfering scenarios.

The DARP Phase II reference test scenarios define a set of interfering signals and corresponding performance limits. These tests are a measure of the capability of the DARP Phase II receiver to receive a wanted modulated signal without exceeding a given degradation due to the presence of these specific unwanted modulated signals.

14.19.3.2.2 Conformance requirement

1. MS indicating support for Downlink Advanced Receiver Performance – phase II (see 3GPP TS 24.008) shall fulfil the requirements in table 2q for the test scenarios defined in annex N. The reference performance shall be:

– For speech channels (TCH/FS, TCH/AFSx, TCH/AHSx) FER:  1 %

2. The values in table 2q are given as the C/I1 ratio, where C is the power level of the wanted signal and I1 is the power level of the dominant co-channel interferer (Co-channel 1, see annex N).
In addition for speech channels the residual class Ib BER and residual class II BER performance shall not exceed the specified values in table 2q at the corresponding C/I1.

The performance requirements for GSM 400 and GSM 700 systems are as for GSM 900 in table 2q, except that the GSM 400 MS speed is doubled from that of GSM 900, e.g. TU50 becomes TU100, and the GSM 700 MS speed is increased by a factor of 1.2, e.g. TU50 becomes TU60.3GPP TS 45.005, subclause 6.3.

For T-GSM 810 the requirements for GSM 900 shall apply, apart for those parameters for which a separate requirement exists.

3GPP TS 45.005; sub clause 2

14.19.3.2.3 Test purpose

To verify that the MS does not exceed the first conformance requirement for TCH/AHS under propagation condition TUhigh with an allowance for the statistical significance of the test.

To verify that the MS does not exceed the second conformance requirement for TCH/AHS under propagation condition TUhigh with an allowance for the statistical significance of the test.

14.19.3.2.4 Method of test

14.19.3.2.4.1 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. RADIO_LINK_TIMEOUT is set to maximum.

The multirate configuration indicates the use of a codec set limited to 7,4 kbit/s.

The SS transmits Standard Test Signal C1 on the traffic channel (wanted signal), with training sequence code (TSC) = 0.

The SS commands the MS to create the traffic channel loop back, signalling erased frames (subclause 36).

14.19.3.2.4.2 Procedure

a) In addition to the wanted signal, the SS produces a further four interfering signals to produce scenario DTS-2.

A signal of type I1 using the same ARFCN as C1, with fading characteristics of TUHigh, and signal level of -70 dBm.

A signal of type I1 using the same ARFCN as C1, with fading characteristics of TUHigh, and signal level of -80 dBm.

A signal of type I1 using an ARFCN one higher than C1, with fading characteristics of TUHigh, and signal level of -67 dBm.

A signal of type I3 using the same ARFCN as C1, and signal level of -87 dBm.

b) The SS sets the level of the wanted signal to that indicated by Clev in table 14.19.3.2-2 or 14.19.3.2-3, and sets the fading characteristic of the signal to TUHigh. Antenna correlation is set to 0 and antenna gain imbalance is set to 0dB.

c) The SS compares the modulation of the signal that it sends to the MS with the signal which is looped back from the receiver after demodulation and decoding, and checks the frame erasure indication.

d) The SS determines the number of residual bit error events for the bits of the class Ib and II, by examining at least the minimum number of samples of consecutive bits of class Ib and II. Bits are only taken from those frames not signalled as erased.

e) The SS also determines the frame erasure events by examining at least the minimum number of samples of consecutive frames and assuming a frame is received successfully if it is not signalled as erased.

f) The SS uses a Channel Mode Modify procedure to change the active codec set to 5,9 kbit/s and steps b) to e) are repeated.

Maximum/Minimum Duration of Test

Maximum: 19 minutes (GSM 400, GSM700, GSM850, GSM900), 19 minutes (DCS1800, PCS1900).

Minimum: 14 minutes (GSM 400, GSM700, GSM850, GSM900), 7 minutes (DCS1800, PCS1900).

14.19.3.2.5 Test requirements

Testing should be performed using statistical methods that lead to an early pass/fail decision with test time significantly reduced for MS with FER/BER not on the limit.

For more information on statistical testing of BER/BLER performance, especially the definition of limit lines refer to Annex 7.

Wrong decision risk F for one single error rate test:

Fpass   =   Ffail   =   F and F   =   0.2%

Wrong decision probability D per test step:

Dpass   =   Dfail   =   D and D   =   0.0085%

Parameters for limit lines:

1. D =  0.000085 wrong decision probability per test step.

2. M =   1.5 bad DUT factor

3. ne number of (error) events. This parameter is the x‑ordinate in figure A7.1.3.1.

4. ns number of samples. The error rate is calculated from ne and ns.

Limit checking

Before limit checking is valid the minimum test time due to fading needs to be considered:

Testing under multipath and interference conditions requires that at least 990 wavelengths are crossed with the speed given in the fading profile. This leads to a minimum test time depending on the frequency range. No early pass/fail decision is allowed until the minimum test time due to fading has elapsed.

Table 14.19.3.2-1: Minimum test times due to TU 50 fading conditions

Half Rate 50 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,35

0,33

0,17

0,16

m

min test time

403

380

190

180

s

0:06:43

0:06:20

0:03:10

0:03:00

hh.mm:ss

Half Rate 60 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,43

m

min test time

408

s

0:06:48

hh.mm:ss

Half Rate 100 km/h

Frequency

0,4

0,7

0,85

0,9

1,8

1,9

GHz

Wavelength

0,75

m

min test time

428

s

0:07:08

hh.mm:ss

If the minimum test time due to multipath conditions exceeds the target test time, then the test runs for the minimum test time due to multipath conditions and the decision is made by comparing the result with the “derived test limit”. In this case early pass/fail decisions are obsolete.

If the target test time exceeds the minimum test time due to multipath conditions early pass/fail decisions can be headed for in order to accelerate test execution.

For an early decision a minimum number of (error) events is necessary.

For an early pass decision ne   ≥   1 (inclusive artificial error)

For an early fail decision ne   ≥   7

When the target test time has been reached the test is finished and a pass/fail decision can be made.

The error rate measured in this test shall be tested according to the values given in tables 14.19.3.2-2 or 14.19.3.2-3.

Table 14.19.3.2-2: Statistical test limits for bands other than DCS 1800 and PCS 1900 TCH/AHS DARP Phase II DTS-2

DTS-2

0.8 to 0.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

AHS 7.4

DTS-2

Frames

-65.5

50

0.010000

0.012340

27959

560

0:09:20

Class1b

(as frames)

2950

0.005000

0,00617

55916

19

0:00:19

Class II

(as frames)

1400

0.022500

0,027765

12426

9

0:00:09

AHS 5.9

DTS-2

Frames

-67

50

0.010000

0.012340

27959

560

0:09:20

Class1b

(as frames)

2350

0.006400

0,0078976

43685

19

0:00:19

Class II

(as frames)

800

0.038500

0.071572

4821

9

0:00:09

Table 14.19.3.2-3: Statistical test limits for DCS 1800 and PCS 1900 TCH/AHS DARP Phase II DTS-2

DTS-2

1.8 to 1.9GHz

Clev (dBm)

Samples per second

Orig. BER requirement

Derived test limit

Target number of samples

Target test time (s)

Target test time (hh:mm:ss)

AHS 7.4

DTS-2

Frames

-65.5

50

0.010000

0.012340

27959

560

0:09:20

Class1b

(as frames)

2950

0.005200

0,0064168

53766

19

0:00:19

Class II

(as frames)

1400

0.022700

0,0280118

12317

9

0:00:09

AHS 5.9

DTS-2

Frames

-67

50

0.010000

0.012340

27959

560

0:09:20

Class1b

(as frames)

2350

0.007000

0,008638

39940

17

0:00:17

Class II

(as frames)

800

0.037500

0,046275

7456

10

0:00:10