14.2.33 Reference sensitivity FACCH/F performance in VAMOS configuration

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

14.2.33.1 Definition

The reference sensitivity for control channels is the signal level at the MS receiver input at which a certain FER must be achieved.

14.2.33.2 Conformance requirement.

1. For MS supporting VAMOS I, at reference sensitivity level, the FACCH/F FER shall meet the reference sensitivity, performance of table 1s in 3GPP TS 45.005 subclause 6.2.1.a

2. For MS supporting VAMOS II, at reference sensitivity level, the FACCHF FER shall meet the reference sensitivity, performance of table 1t in 3GPP TS 45.005 subclause 6.2.1.a

3. For MS supporting VAMOS III, at reference sensitivity level, the FACCHF FER shall meet the reference sensitivity, performance of table 1x in 3GPP TS 45.005 subclause 6.2.1.a

14.2.33.3 Test purpose.

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

14.2.33.4 Method of test

14.2.33.4.1 Initial conditions

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

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. The other VAMOS subchannel (subchannel 1) uses trainings sequences 5 from TSC set 1.

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.

14.2.33.4.2 Procedure

a) The fading function is set to TUhigh for MS indicating VAMOS I or VAMOS II support and TUhigh/(Corr.=0, AGI=0 dB as per 3GPP TS 45.005 Annex Q.7) for MS indicating VAMOS III support.

b) The SS sets SCPIR to +4 dB.

c) Depending of the indicated VAMOS type and the relevant antenna correlation and antenna gain imbalance values, the SS sets the amplitude of the wanted signal to reference sensitivity level from table 1s for VAMOS I or table 1t for VAMOS II or table 1x for VAMOS III in TS 45.005.

d) The SS sends a Layer 3 message which does not require a Layer 3 response from the MS. Due to the low signal level the MS may not be able to acknowledge the Layer 2 frame with an RR frame and the SS will repeat the Layer 2 frame. Each repeated L2 frame will be counted and will indicate a frame erasure event.

e) The SS determines the frame erasure events during at least the minimum number of samples of FACCH/F frames.

f) The SS sets SCPIR to 0 dB and steps c) to e) are repeated.

g) The SS sets SCPIR to -4 dB and steps c) to e) are repeated.

h) For MS indicating VAMOS II or VAMOS III support, steps c) to e) are repeated for SCPIR -8 dB and -10 dB.

i) For MS indicating VAMOS III support, steps b) to h) are repeated with the SS fading function set in turn to TU high/(Corr.=0,7, AGI=-6 dB as per 3GPP TS 45.005 Annex Q.7).

NOTE: These frames will not be consecutive but it is expected that the statistical significance of the tests will not be unduly degraded.

14.2.33.5 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)

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

Table 14.20.7-1: Minimum test times due to TU high fading conditions

 Fading speed 50km/h Frequency /MHz 850 900 1800 1900 Wave length / m 0,35 0,33 0,17 0,16 Min. Test time /s 629 594 297 281 hh:mm:ss 00:10:29 00:09:54 00:04:57 00:04:41

The error rates measured shall not exceed the test limit error rate values given in table 14.2.33-2 through 14.2.33-5 depending on the indicated VAMOS type and the relevant antenna correlation and antenna gain imbalance values.

Table 14.2.33-2: Limits for FACCH/F sensitivity (VAMOS I MS)

 GSM 900 / 850 Channel SCPIR_DL /dB Clev /dBm Samples per s Orig. BER requirement Derived test limit Target number of samples Target test time /s Target test time(hh:mm:ss) FACCH/F 4 -100 16 0.05 0.0617 5592 350 00:05: 50 0 -97 -4 -93,5 GSM 1800 / 1900 FACCH/F 4 -100,5 0 -98 -4 -94,5

Table 14.2.33-3: Limits for FACCH/F sensitivity (VAMOS II MS)

 GSM 900 / 850 Channel SCPIR_DL /dB Clev /dBm Samples per s Orig. BER requirement Derived test limit Target number of samples Target test time /s Target test time(hh:mm:ss) FACCH/F 4 -100 16 0.05 0.0617 5592 350 00: 05:50 0 -97,5 -4 -96 -8 -93,5 -10 -91,5 GSM 1800 / 1900 FACCH/F 4 -100,5 0 -98,5 -4 -97 -8 -94 -10 -92

Table 14.2.33-4: Limits for FACCH/F sensitivity (VAMOS III MS, Corr=0.0, AGI=0 dB)

 GSM 900 / 850 Channel SCPIR_DL /dB Clev /dBm Samples per s Orig. BER requirement Derived test limit Target number of samples Target test time /s Target test time(hh:mm:ss) FACCH/F 4 -104,5 16 0.05 0.0617 5592 350 00: 05:50 0 -103 -4 -101 -8 -98,5 -10 -96,5 GSM 1800 / 1900 FACCH/F 4 -105 0 -103 -4 -101 -8 -99 -10 -97

Table 14.2.33-5: Limits for FACCH/F sensitivity (VAMOS III MS, Corr=0.7, AGI=-6 dB)

 GSM 900 / 850 Channel SCPIR_DL /dB Clev /dBm Samples per s Orig. BER requirement Derived test limit Target number of samples Target test time /s Target test time(hh:mm:ss) FACCH/F 4 -101,5 16 0.05 0.0617 5592 350 00: 05:50 0 -99,5 -4 -98 -8 -95,5 -10 -93,5 GSM 1800 / 1900 FACCH/F 4 -101,5 0 -99,5 -4 -98 -8 -95,5 -10 -93,5