14.2.7a Reference sensitivity – TCH/EFS in TIGHTER configuration

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

14.2.7a.1 Definition

The reference sensitivity is the signal level at the MS receiver input at which a certain BER and FER must be achieved.

14.2.7a.2 Conformance requirement

3GPP TS 45.005 subclause 6.2.5

The reference performance for Tightened Link Level Performance (TIGHTER) specified in table 1w, shall be

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

In addition for speech channels the residual class Ib BER and residual class II BER performance shall not exceed the specified values in table 1w at the corresponding signal level in dBm. The reference sensitivity level in section 6.2.1 shall be applied for TIGHTER MS.

14.2.7a.3 Test purpose

NOTE: This test is performed under STATIC propagation conditions to allow implicit testing of the ability of the MS to hop over the full band. The tests under dynamic propagation conditions are better suited to test the reference sensitivity conformance but cannot test hopping over the full band due to limited bandwidth of available fading simulators.

1. For TCH EFS/FER, MS shall meet the reference sensitivity performance mentioned in 3GPP TS 45.005 sub clause 6.2.5, for reference sensitivity level mentioned in Table 1w according to propagation conditions.

2. At reference sensitivity level, the TCH/EFS class Ib RBER shall meet the performance mentioned in table 1w in 3GPP TS 45.005.

3. At reference sensitivity level, the TCH/EFS RBER2 shall meet the performance mentioned in table 1w in 3GPP TS 45.005.

14.2.7a.4 Method of test

NOTE 1: The BA list sent on the BCCH and SACCH will indicate at least six surrounding cells with at least one near to each band edge. It is not necessary to generate any of these BCCHs but, if provided the signal strengths of BCCHs shall be in the range 15 dBmVemf(  ) to 35 dBmVemf(  ).

NOTE 2: The ARFCN of any BCCH shall not be co-channel or on adjacent channels to the wanted traffic channel.

14.2.7a.4.1 Initial conditions

A call is set up according to the generic call set up procedure on a TCH/EFS with an ARFCN in the Mid ARFCN range for GSM 400, GSM 700, T-GSM 810, GSM 850, DCS 1800 and PCS 1 900 and ARFCN 70 for GSM 900, power control level set to maximum power.

NOTE: For GSM 900 ARFCN 70 is tested since this is the 73rd harmonic of the 13 MHz clock normally used internally in a MS.

The SS transmits Standard Test Signal C1 on the traffic channel.

The SS commands the MS to create traffic channel loop back signalling erased frames.

Specific PICS Statements:

14.2.7a.4.2 Procedure

a) The fading function is set to TUhigh.

b) The SS sets the amplitude of the wanted signal to reference sensitivity as defined in Table 1w.

c) The SS compares the data 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 class II, by examining sequences of at least the minimum number of samples of consecutive bits of class II. Bits are taken only from those frames not signalled as erased.

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

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

g) Steps a) to d) are repeated under extreme test conditions.

h) Steps a) to g) are repeated for TCH/EFS with ARFCNs in the Low ARFCN range for GSM 400, GSM 700, T-GSM 810, GSM 850, DCS 1800 and PCS 1 900 and ARFCN 5 for GSM 900 and the High ARFCN range.

NOTE: For GSM 900 ARFCN 5 is tested since this is the 72nd harmonic of the 13 MHz clock normally used internally in a MS.

i) Steps b) to d) are repeated with the SS fading function set in turn to RA and HT.

j) Steps b) to g) are repeated, with the SS fading function set to static and the MS is commanded by the SS into hopping mode using the hopping sequence defined in clause 6.

The amplitude of the wanted signal is set according to step b). All the other time slots, except the active ones, are set to 20 dB above reference sensitivity level(  ). This implicitly tests adjacent time slot rejection.

14.2.7a.5 Test requirements

The error rates measured for different channels and under the different propagation conditions, under any combination of normal and extreme test voltages and ambient temperatures, shall not exceed the test limit error rate values given in tables 14.2.7a.5-1, 14.2.7a.5-2.

Table 14.2.7a.5-1: Limits for GSM 850 and GSM 900 sensitivity

Channels

Propagation conditions TUhigh

Propagation conditions RA

Propagation conditions HT

Static conditions

Test limit error rate %

Minimum No. of samples

Test limit error rate %

Minimum No. of samples

Test limit error rate %

Minimum No. of samples

Test limit error rate %

Minimum No. of samples

TCH/EFS

FER

1

8900

1

164000

class Ib(RBER)

0,03

1000000

0,03

20000000

class II (RBER)

3,29

120000

6,19

24000

5,34

60000

6,22

8200

Table 14.2.7a.5-2: Limits for DCS 1800 and PCS 1900 sensitivity

Channels

Propagation conditions TUhigh

Propagation conditions RA

Propagation conditions HT

Static conditions

Test limit error rate %

Minimum No. of samples

Test limit error rate %

Minimum No. of samples

Test limit error rate %

Minimum No. of samples

Test limit error rate %

Minimum No. of samples

TCH/EFS

FER

1

13400

1

164000

class Ib(RBER)

0,04

1500000

0,03

20000000

class II(RBER)

4,92

60000

6,07

24000

6,85

30000

6,22

8200