14.18.10 Latency Reductions

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

14.18.10.1 Minimum Input level for Reference Performance for PAN

14.18.10.1.1 Definition

The minimum input level is the signal level at the MS receiver input at which a certain BLER is met.

14.18.10.1.2 Conformance requirement

1. The block error rate (BLER) performance of data blocks containing PAN for PDTCH/MCS mentioned in the table 14.18.10.1-1 shall not exceed 10 % of input levels according to the table 14.18.10.1-1.

Table 14.18.10.1-1: Input signal level (for MS) at reference performance for GMSK, and 8-PSK with PAN included;
BTTI and RTTI
(EGPRS DL)

All GSM bands

Type of channel

Propagation conditions Static

PDTCH/MCS -1

[-104,0] dBm

PDTCH/MCS-2

[-104,0] dBm

PDTCH/MCS-3

[-101,5] dBm

PDTCH/MCS-5

[-99,0] dBm

PDTCH/MCS-6

[-97,0] dBm

PDTCH/MCS-7

[-94,0] dBm

PDTCH/MCS-8

[-90,5] dBm

These limits are corrected by the following values for the following classes of MS:

MS, GMSK modulated signals

for DCS 1 800 class 1 or class 2 MS

+2/+4 dB**

for DCS 1 800 class 3 MS

+2 dB

for GSM 400 small MS, GSM 900 small MS GSM 850 small MS and GSM 700 small MS

+2 dB

for other GSM 400, GSM 900 MS and GSM 850 MS and GSM 700 MS

0 dB

for PCS 1900 class 1 or class 2 MS

+2 dB

for other PCS 1900 MS

0 dB

MS, QPSK, 8-PSK, 16-QAM and 32-QAM modulated signals

for GSM 400, GSM 900, GSM 850 and GSM 700 small MS

0 dB

for other GSM 400, GSM 900, GSM 850 and GSM 700 MS

-2 dB

for DCS 1 800 and PCS 1900 class 1 or class 2 MS

0 dB

for other DCS 1 800 and PCS 1900 MS

-2 dB

3GPP TS 45.005, table 1o; 3GPP TS 45.005, subclause 6.2

2. The PAN error rate (incorrect decoding of PAN in downlink data blocks) at the mobile station shall not exceed 5% at input levels according to the table 14.18.10.1-2.

Table 14.18.10.1-2: Input signal level (for MS) at reference performance of PAN for GMSK and8-PSK, (EGPRS DL) ;
BTTI and RTTI

All GSM bands

Type of

Channel

Propagation conditions

Static

PDTCH/MCS-1 to 3

[-104,0] dBm

PDTCH/MCS-5 to 6

[-101,5] dBm

PDTCH/MCS-7

[-101,0] dBm

PDTCH/MCS-8

[-100,5] dBm

These limits are corrected by the following values for the following classes of MS:

MS, GMSK modulated signals

for DCS 1 800 class 1 or class 2 MS

+2/+4 dB**

for DCS 1 800 class 3 MS

+2 dB

for GSM 400 small MS, GSM 900 small MS GSM 850 small MS and GSM 700 small MS

+2 dB

for other GSM 400, GSM 900 MS and GSM 850 MS and GSM 700 MS

0 dB

for PCS 1900 class 1 or class 2 MS

+2 dB

for other PCS 1900 MS

0 dB

MS, QPSK, 8-PSK, 16-QAM and 32-QAM modulated signals

for GSM 400, GSM 900, GSM 850 and GSM 700 small MS

0 dB

for other GSM 400, GSM 900, GSM 850 and GSM 700 MS

-2 dB

for DCS 1 800 and PCS 1900 class 1 or class 2 MS

0 dB

for other DCS 1 800 and PCS 1900 MS

-2 dB

3GPP TS 45.005, table 1r; 3GPP TS 45.005, subclause 6.2

3. The BLER performance and PAN error rate shall not exceed the conformance requirements given in 1 and 2 above under extreme conditions; 3GPP TS 45.005, subclause 6.2 and annex D subclauses D.2.1 and D.2.2.

3GPP TS 45.005 subclause 2:

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

14.18.10.1.3 Test purpose

1. To verify that the MS does not exceed conformance requirement 1 for PDTCHs using different coding schemes and under static propagation conditions with an allowance for the statistical significance of the test.

2. To verify that the MS does not exceed conformance requirement 2 under static propagation conditions with an allowance for the statistical significance of the test.

3. To verify that the MS does not exceed conformance requirement 3 under static propagation conditions with an allowance for the statistical significance of the test.

14.18.10.1.4 Method of test

Initial conditions

NOTE 1: The BA list sent on the BCCH 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 dBVemf to35 dBVemf. Surrounding cell signal levels and cell reselection parameters are set so that the MS will not attempt a cell reselection.

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

NOTE 3: When frequency hopping is used under static conditions, the traffic channel may fall on any of the ARFCNs defined in clause 6. When frequency hopping is used under non-static conditions any ARFCNs shall be chosen.

Test procedure

a) A downlink TBF with polled FANR enabled is established on an ARFCN in the mid-range using a BTTI configuration. The power control parameter ALPHA (α) is set to 0 and the SS commands the MS to transmit at maximum power. The SS allocates the maximum number of receive timeslots according to the MS’s multislot class.

b) The SS transmits downlink RLC data blocks addressing the MS using the MCS-3 coding scheme at a level 1 dB above the level given in conformance requirement 1. A PAN field is included in each downlink RLC data block. Note : The PAN field in the downlink RLC data blocks does not address the MS as the MS does not have an uplink TBF active.

c) The SS polls the MS for (EGPRS) PACKET DOWNLINK ACK/NACK at a rate sufficient to prevent an RLC window stall condition in the MS.

d) The SS re-transmits any downlink RLC data blocks NACKED by the MS in the (EGPRS) PACKET DOWNLINK ACK/NACK message. Note : The SS shall not repeat the re-transmission of any particular block without having ascertained reception or non-reception of the previous re-transmission by again polling the MS.

e) The SS calculates the BLER performance as a percentage based on the number of re-transmitted downlink RLC data blocks (where each re-transmission instance counts as one sample) divided by the total number of downlink RLC data blocks transmitted (including all re-transmission instances) during the downlink TBF.

f) The SS terminates the downlink TBF by sending a PACKET TBF RELEASE message.

g) An uplink TBF with FANR enabled using BTTI USF Mode is established on an ARFCN in the mid-range using a BTTI configuration. The power control parameter ALPHA (α) is set to 0 and the SS commands the MS to transmit at maximum power. The SS allocates the maximum number of transmit timeslots according to the MS’s multislot class. The SS commands the MS to send uplink RLC data blocks using the MCS-3 coding scheme.

h) During the uplink TBF, the SS sends downlink RLC data blocks at a level 1 dB above the level given in conformance requirement 2 using the same MCS as used for the uplink TBF in which the SS periodically includes a PAN field in the time based format. The reported bitmap in the PAN field shall set all blocks to ACKED. The SS shall include the PAN field sufficiently often to cover all uplink RLC data blocks received without gaps, but shall not send PAN fields in which the reported bitmaps overlap. Note : The downlink RLC data blocks do not address the MS as the MS does not have a downlink TBF active.

i) When including the PAN field, the SS shall note the set of uplink BSNs acknowledged by each PAN field. If the MS subsequently re-transmits one or more BSNs in any particular set, this counts as one error sample. The SS calculates the PAN error rate as a percentage based on the number of error samples divided by the number of PAN fields sent during the uplink TBF.

j) The SS terminates the uplink TBF by sending a PACKET TBF RELEASE message.

k) Steps a) to j) are repeated using the MCS-8 coding scheme in Steps b) and g).

14.18.10.1.5 Test requirements

The block error rate performance (BLER) as calculated by the SS for different MCSs under any combination of normal and extreme test voltages and ambient temperatures, shall not exceed the conformance requirement.

The PAN error rate as calculated by the SS under any combination of normal and extreme test voltages and ambient temperatures shall not exceed the conformance requirement.