14.18.5b Blocking and spurious response in DLMC configuration

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

14.18.5b.1 Definition

Blocking is a measure of the ability of the receiver to receive a modulated wanted input signal in the presence of an unwanted input signal, on frequencies other than those of the spurious responses or the adjacent channels, without exceeding a given degradation. "Wanted signal" in this test is the signal generated by the transmitted RLC data blocks.

14.18.5b.2 Conformance requirement

1. The blocking characteristics of the receiver are specified separately for in-band and out-of-band performance as identified in 3GPP TS 45.005 subclause 5.1.

2. In case of DLMC configuration, when MS is configured according to subclause 6.1a. The block error rate (BLER) performance for PDTCH/MCS1 to 4 shall not exceed 10 % and for USF/MCS1 to 4 shall not exceed 1 % when the following signals are simultaneously input to the receiver:- for GSM 850, GSM 900, DCS 1800 and PCS  1900 MS two useful signals, modulated with GMSK at frequencies fo and f1, located at

– the maximum supported DLMC carrier frequency spacing as defined in table 6a-1 when the blocking signal is located in the out-of-band frequency range defined in tables 5.1-1a, 5.1-1c, 5.1-1d and 5.1-1e.

– the maximum supported DLMC carrier frequency spacing and all lower carrier frequency spacings according to table 5.1-1i when the blocking signal is located in the in-band frequency range defined in tables 5.1-1a, 5.1-1c, 5.1-1d and 5.1-1e.

and at a signal level X dB above the input levels in table 1a, adjusted by the correction factors of table 6.2‑4, where X is specified in table 5.1‑5c;

In addition, for an MS indicating support for non-contiguous intra-band reception, and in case of DLMC configuration, the reference performance as specified in table 6.2-5 apply with the two useful signals at frequencies fo and f1 located at a larger frequency spacing than the maximum supported DLMC carrier frequency spacing.

‑ a blocking signal that is either

– a continuous, static sine wave signal at a frequency (f) which is an integer multiple of 200 kHz, when located between the useful signals, or when located in the out-of-band frequency range, and at a signal level as in table 5.1-5c or

– a static signal at a frequency (f) modulated with 5 MHz W-CDMA according to 3GPP TS 25.101 annex C.4, when located outside the useful signals and

– within the in-band frequency region, at an offset between the centre frequency of the blocking signal and the useful signal of 2,7 MHz or more in steps of 5 MHz up to the edges of the in-band frequency band, and

– at a signal level as in table 5.1‑5c.

with the following exceptions, called spurious response frequencies:

a) GSM 900 MS and GSM 850 MS in band, for a maximum of one occurrence;

DCS 1 800 and PCS 1 900 MS in band, for a maximum of two occurrences;

b) out of band, for a maximum of 24 occurrences (which if grouped shall not exceed three contiguous occurrences per group).

where the above performance shall be met when the blocking signal (f) is set to a level of 57+X dBµV (emf) (-56+X dBm) in the inband frequency range and 70 dBµV (emf) (‑43 dBm) in the out-of-band frequency range.

When more than one useful signal frequency is considered, the maximum number of allowed occurrences for the spurious response frequencies applies separately to each useful signal frequency.

In case of DLMC configuration, requirements for inter-band reception are only defined in the out-of-band frequency region for band combinations (GSM 850, PCS1900) and (GSM 900, DCS 1800). In this case, the requirements for each frequency band apply using one useful signal in each band.

An MS indicating support for DLMC shall in addition to DLMC specific performance requirements, comply with the requirements in Table 5.1-2a and Table 5.1-4.

NOTE: For testing effort reasons, in case of DLMC configuration, and a MS indicating support for DLMC inter-band reception, it may be considered sufficient to perform the test in the out-of-band frequency range only for the inter-band reception configuration.

Table 5.1-1i. Additional carrier frequency spacings for Downlink Multi Carrier when the blocking signal is located in the in-band frequency range

18.0 MHz

13.2 MHz

8,8 MHz

7.0 MHz

5.4 MHz

4.2 MHz

3.2 MHz

2.4 MHz

2.0 MHz

1.4 MHz

0.8 MHz

0.6 MHz

14.18.5b.3 Test purpose

1. To verify that the in-band blocking performance is met without exceeding the total number of allowed in-band spurious responses. An allowance is made for the statistical significance of the test.

2. To verify that at selected out of band frequencies, the out of band blocking performance is met without exceeding the total number of allowed out of band spurious responses. An allowance is made for the statistical significance of the test.

NOTE: Not all of the possible out of band frequencies are tested as this results in excessive test time. However, the total number of out of band spurious responses, specified in 3GPP TS 45.005, is allowed to ensure a fair test of the MS.

14.18.5b.4 Method of test

Initial conditions

A call is set up according to the generic call set up procedure, except the BCCH frequency list shall be empty, on a TCH with an arbitrary ARFCN in the range supported by the MS. The power control level is set to maximum power. The ARFCN of the BCCH shall be the same – or at an offset of +/- 2 channels, than that of the ARFCN for the TCH.

The SS transmits EGPRS RLC data blocks containing random data.

In addition to the wanted Test Signals, the SS transmit a static unmodulated continuous interfering signal (Standard Test Signal I0).Or a static signal modulated with 5 MHz W-CDMA according to 3GPP TS 25.101 annex C.4

Test procedure

For the ACK/NACK test steps the maximum number of supported time slots shall be used, and for the USF test steps the maximum supported symmetrical UL slot configuration shall be used.

For GMSK Modulation:

a) The SS is set to produce 2 static GMSK wanted signals and a static interfering signal at the same time.
The two useful signals, modulated with GMSK at frequencies fo and f1, located at

– the maximum supported DLMC carrier frequency spacing as defined in 3GPP TS 45.005 table 6a-1 when the blocking signal is located in the out-of-band frequency range defined in 3GPP TS 45.005 tables 5.1-1a, 5.1-1c, 5.1-1d and 5.1-1e.

– the maximum supported DLMC carrier frequency spacing and all lower carrier frequency spacings according to3GPP TS 45.005 table 5.1-1i when the blocking signal is located in the in-band frequency range defined in 3GPP TS 45.005 tables 5.1-1a, 5.1-1c, 5.1-1d and 5.1-1e.

and at a signal level X+1 dB above the input levels in table 14.18.3a, where X is specified in 3GPP TS 45.005 table 5.1‑5c for PDTCH channel and signal level X+1 dB above the input levels in table 14.18-4a for USF channel with correction values as specified in 3GPP TS 45.005 subclause 6.2.b) The SS transmits packets on PDTCH using MCS-4 coding to MS on all allocated timeslots.

c) The unwanted signal is of frequency FB. That is either

– a continuous, static sine wave signal at a frequency (f) which is an integer multiple of 200 kHz, when located between the useful signals, or when located in the out-of-band frequency range, and at a signal level as in table 14.18.5b-1, or

– a static signal at a frequency (f) modulated with 5 MHz W-CDMA according to 3GPP TS 25.101 annex C.4, when located outside the useful signals and

– within the in-band frequency region, at an offset between the centre frequency of the blocking signal and the useful signal of 2,7 MHz or more in steps of 5 MHz up to the edges of the in-band frequency band, and at a signal level as in table 14.18.5b-1

It is applied in turn on the subset of frequencies calculated at step d) in the overall range 100 kHz to 12,75 GHz, where FB is an integer multiple of 200 kHz.

However, frequencies in the range FR ± 600 kHz are excluded.

NOTE: Allowance must be made for possible spurious signals arising from the SS. These are particularly likely at sub harmonic frequencies nFB where n = 2, 3, 4, 5, etc.

d) The frequencies at which the test is performed (adjusted to an integer multiple of 200 kHz channels most closely approximating the absolute frequency of the calculated blocking signal frequency) are the combined frequencies from i), ii) and iii) which follow:

i) The total frequency range formed by:

GSM 850 the frequencies between Flo + (IF1 + IF2 + … + IFn + 12,5 MHz)

and Flo – (IF1 + IF2 + … + IFn + 12,5 MHz).

P-GSM 900: the frequencies between Flo + (IF1 + IF2 + … + IFn + 12,5 MHz)

and Flo – (IF1 + IF2 + … + IFn + 12,5 MHz).

E-GSM 900: the frequencies between Flo + (IF1 + IF2 + … + IFn + 17,5 MHz)

and Flo – (IF1 + IF2 + … + IFn + 17,5 MHz).

DCS 1 800: the frequencies between Flo + (IF1 + IF2 + … + IFn + 37,5 MHz)

and Flo – (IF1 + IF2 + … + IFn + 37,5 MHz).

PCS 1 900: the frequencies between Flo + (IF1 + IF2 + … + IFn + 30 MHz)

and Flo – (IF1 + IF2 + … + IFn + 30 MHz).

and

the frequencies +100 MHz and -100 MHz from the edge of the relevant receive band.

Measurements are made at 200 kHz intervals.

ii) The three frequencies IF1, IF1 + 200 kHz, IF1 – 200 kHz.

iii) The frequencies:

mFlo + IF1;

mFlo – IF1;

mFR;

where m is all positive integers greater than or equal to 2 such that either sum lies in the range 100 kHz to 12,75 GHz.

The frequencies in step ii) and iii) lying in the range of frequencies defined by step i) above need not be repeated.

Where:

Flo – local oscillator applied to first receiver mixer

IF1 … IFn – are the n intermediate frequencies

Flo, IF1, IF2 … IFn – shall be declared by the manufacturer in the PIXIT statement
3GPP TS 51.010-1 annex 3.

Table 14.18.5b-1: Blocking signal level requirements for MS in DLMC configuration

Frequency band

GSM 850,
P- and E-GSM 900 small MS

DCS 1 800 & PCS 1 900 MS

X=3 dB

X= 12 dB

X = 3 dB

X= 12 dB

dBµV

dBm

dBµV

dBm

dBµV

dBm

dBµV

dBm

(emf)

(emf)

(emf)

(emf)

in‑band,

with blocking signal

– in-between the useful signals

600 kHz  |f‑fo | or |f‑f1|

60

‑53

69

-44

60

‑53

69

-44

– outside the useful signals

|f‑fo | or |f‑f1|=2,7 MHz

60

‑53

69

-44

60

‑53

69

-44

|f‑fo | or |f‑f1|=7,7 MHz

70

-43

79

-34

70

‑43

79

-34

|f‑fo | or |f‑f1|≥ 12,7 MHz

75

‑38

84

-29

75

‑38

84

-29

out‑of‑band

(a)

98

-15

98

-15

(b)

86

‑27

(c)

86

‑27

(d)

98

-15

98

-15

NOTE 1: f refers to the interfering blocker signal, and fo and f1 refer to the wanted signals being considered.

NOTE 2: For definition of small MS, see subclause 1.1.

NOTE 3: X is the increase level above input level for reference performance as defined in subclause 5.1.2.

f) The SS counts the number of blocks transmitted with current coding scheme and the number of these blocks not acknowledged based on the content of the Ack/Nack Description information element (see 3GPP TS 44.60, subclause 12.3) in the Packet Downlink Ack/Nack as sent from the MS to the SS on the PACCH.

NOTE 1: Due to the error rates related to the USF, the MS is likely to occasionally miss its USF for transmitting the Packet Downlink Ack/Nack. As this requirement is not verified in this part of the test, the SS then again assigns uplink resources so the MS can send this message.

g) Once the number of blocks transmitted with the current coding scheme as counted in step f) reaches or exceeds the minimum number of blocks as given in table 14.18-2, the SS calculates the Block error ratio. The SS resets both counters.

If a failure is indicated, it is noted and counted towards the allowed exemption total. In the case of failures discovered at the predicted frequencies at steps d i), ii) or iii) the test is repeated on the adjacent channels ±200 kHz away. If either of these two frequencies fail then the next channel 200 kHz beyond is also be tested. This process is repeated until all channels constituting the group of failures is known.

h) The SS sets the value of the USF/MCS-4 such as to allocate the uplink to the MS.

i) The unwanted signal is of frequency FB. It is applied in turn on the subset of frequencies calculated at step d) in the overall range 100 kHz to 12,75 GHz, where FB is an integer multiple of 200 kHz.

However, frequencies in the range FR ±600 kHz are excluded.

NOTE 2: Allowance must be made for possible spurious signals arising from the SS. These are particularly likely at sub harmonic frequencies nFB where n = 2, 3, 4, 5, etc.

j) The level and configuration of the unwanted signal is set according to step c).

k) The SS counts the number of times the USF is allocated to the MS, and the number of times the MS does not transmit while being allocated the uplink.

l) Once the number of USF/MCS-4 allocating the uplink for the MS as counted in step k) reaches or exceeds the minimum number of blocks as given in table 14.18-2, the SS calculates the Block error ratio. The SS resets both counters. If a failure is indicated, it is noted and counted towards the allowed exemption total.

In the case of failures discovered at the predicted frequencies at steps d i), ii) or iii) the test is repeated on the adjacent channels ±200 kHz away. If either of these two frequencies fail then the next channel 200 kHz beyond is also be tested. This process is repeated until all channels constituting the group of failures is known.

14.18.5b.5 Test requirements

The block error ratio as calculated by the SS for different channels and coding schemes shall not exceed the conformance requirement. Testing the conformance requirement can be done either in the classical way with a fixed minimum number of samples (refer to section 14.18.5b.5.2) or using statistical methods that lead to an early pass/fail decision with test time significantly reduced for MS with performance not on the limit (refer to section 14.18.5b.5.1). Both methods are based on a bad DUT factor M = 1.5.

This shall apply under normal test voltage and ambient temperature, and with the interfering signal at any frequency in the range specified.

The following exceptions are allowed:

GSM 900 MS and GSM 850: MS in band, for a maximum of one occurrence;

DCS 1 800 and PCS 1 900: MS in band, for a maximum of two occurrences;

All Bands: out of band, for a maximum of 24 occurrences (which if grouped shall not exceed three contiguous occurrences per group).where the above performance shall be met when the blocking signal (f) is set to a level of 57+X dBµV (emf) (-56+X dBm) in the inband frequency range and 70 dBµV (emf) (‑43 dBm) in the out-of-band frequency range.

When more than one useful signal frequency is considered, the maximum number of allowed occurrences for the spurious response frequencies applies separately to each useful signal frequency. The number of Error Events recorded in this test shall not exceed the test limit error rate values given above, when using either the accelerated BLER method or the maximum number of samples.

No failures are allowed at this lower unwanted signal level.

14.18.5b.5.1 Statistical testing of blocking and spurious response performance with early decision

For more information on statistical testing of blocking and spurious response performance, especially the definition of limit lines refer to Annex 7.

Wrong decision risk F for one single error rate test:

Fpass   ≠   Ffail As the blocking test case comprises of many BLER tests the wrong decision risk for a fail decision of one single error rate test must be smaller than the wrong decision risk for a pass decision to avoid an increased probability of an erroneous fail decision.

Fpass   =   0.2%

Ffail    =   0.02%

Wrong decision probability D per test step:

Dpass    ≠   Dfail

Dpass    =   0.008%

Dfail     =      0.0008%

Parameters for limit lines:

1. Dpass    = 0.008% wrong decision probability per test step for early pass decision.

Dfail     =  0.0008% wrong decision probability per test step for early fail decision.

2. M = 1.5 bad DUT factor

3. ne number of (error) events.

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

Limit checking

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

For an early pass decision ne   ≥   1

For an early fail decision ne   ≥   8

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

The statistical testing of the conformance requirement is done using table 14.18.5-1.

Table 14.18.5-1: Statistical test limits for blocking performance of EGPRS mobiles

Blocking and spurious response for EGPRS mobiles

 

 

Orig. BLER

Derived

Target number

Target test

Target test time

 

blocks per s

requirement

test limit

of samples

time (s)

(hh:mm:ss)

One time slot:

PDTCH/MCS-4

50

0,100000

0,125100

3221

64

00:01:04

USF/MCS-4

50

0,010000

0,012510

32214

644

00:10:44

Two time slots:

PDTCH/MCS-4

100

0,100000

0,125100

3221

32

00:00:32

USF/MCS-4

100

0,010000

0,012510

32214

322

00:05:22

Three time slots

PDTCH/MCS-4

150

0,100000

0,125100

3221

21

00:00:21

USF/MCS-4

150

0,010000

0,012510

32214

215

00:03:35

Four time slots

PDTCH/MCS-4

200

0,100000

0,125100

3221

16

00:00:16

USF/MCS-4

200

0,010000

0,012510

32214

161

00:02:41

14.18.5b.5.2 Fixed testing of blocking and spurious response performance with minimum number of samples

The fixed testing of the conformance requirement is done using the minimum number of samples and the limit BLER given in table 14.18‑2.