53.2 Unacknowledged Mode
3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS
53.2.1 Unacknowledged Mode/ Uplink TBF
53.2.1.1 Unacknowledged Mode/ Uplink TBF/ Stall Indicator
53.2.1.1.1 Conformance requirements
The transfer of RLC data blocks in the RLC unacknowledged mode does not include any retransmissions, except during the release of an uplink TBF where the last transmitted uplink block may be retransmitted (see sub-clause 9.3.3.3).
The network shall send PACKET UPLINK ACK/NACK messages when needed.
The mobile station shall set the Stall indicator (SI) bit to ‘0’ in all RLC data blocks.
References
3GPP TS 04.60, subclause 9.3.3, 9.3.3.2
53.2.1.1.2 Test purpose
To verify that the MS sets SI to ‘0’ in all RLC data blocks
53.2.1.1.3 Method of test
Initial Conditions
System Simulator:
1 cell with EGPRS support, default setting, PBCCH not present.
Mobile Station:
The MS is EGPRS updated with a P-TMSI allocated, SPLIT PG CYCLE negotiated and the test PDP context3 activated.
Specific PICS Statements
–
PIXIT Statements
–
Test Procedure
An uplink TBF in unacknowledged RLC mode is established. Uplink EGPRS Window Size is commanded to be 192. SS assigns resources to the MS to transmit WS data blocks in the uplink. SS verifies that MS transmits data blocks sequentially and that SI is not set in the data blocks.
SS assigns resource to the MS to transmit in uplink.
SS verifies that the MS transmits new data block with BSN=WS after BSN=WS-1 is transmitted and that SI is not set in the data block with BSN=WS.
SS allows the MS to complete the data transfer.
Maximum Duration of Test
10 minutes.
Expected Sequence
Step |
Direction |
Message |
Comments |
---|---|---|---|
1 |
{Uplink dynamic allocation two phase access} |
N = 4400 octets USF_GRANULARITY = 1 block EGPRS Channel Coding Command: MCS-1 EGPRS Window Size: 192 |
|
2 |
SS -> MS |
PACKET DOWNLINK DUMMY CONTROL BLOCK |
Sent on the PACCH of the PDCH assigned, containing USF assigned to the MS. |
3 |
MS -> SS |
EGPRS UPLINK RLC DATA BLOCK |
Received on the assigned PDTCH SS verifies that the BSN of the received data block is 0, and SI is not set. |
4 |
– |
Repeat Steps 2 and 3 until BSN=191 is received |
|
5 |
SS -> MS |
PACKET DOWNLINK DUMMY CONTROL BLOCK |
Sent on the PACCH of the PDCH assigned, containing USF assigned to the MS. |
6 |
MS -> SS |
EGPRS UPLINK RLC DATA BLOCK |
Received on the assigned PDTCH SS verifies that the BSN of the received data block is 192, and SI is not set. |
7 |
SS -> MS |
PACKET UPLINK ACK/NACK |
Acknowledging BSN=192 |
8 |
{Completion of uplink RLC data block transfer} |
53.2.1.2 Unacknowledged Mode/ Uplink TBF/ RBB and SSN
53.2.1.2.1 Conformance requirements
The transfer of RLC data blocks in the RLC unacknowledged mode does not include any retransmissions, except during the release of an uplink TBF where the last transmitted uplink block may be retransmitted (see sub-clause 9.3.3.3).
The SSN and RB are transmitted in both RLC acknowledged and RLC unacknowledged mode (note the SSN is calculated differently in EGPRS (refer to table 8.1.1.1) and GPRS (refer to 9.1.8.1)). The SSN and RB shall be ignored by the RLC receiver in unacknowledged mode.
References
3GPP TS 04.60, subclause 9.1.8.2, 9.3.3, 9.3.3.2
53.2.1.2.2 Test purpose
To verify that the MS ignores SSN and RB included in Packet Uplink Ack/Nack message when in RLC unacknowledged mode.
53.2.1.2.3 Method of test
Initial Conditions
System Simulator:
1 cell with EGPRS support, default setting, PBCCH not present.
Mobile Station:
The MS is EGPRS updated with a P-TMSI allocated, SPLIT PG CYCLE negotiated and the test PDP context3 activated.
Specific PICS Statements
–
PIXIT Statements
–
Test Procedure
An uplink TBF in unacknowledged RLC mode is established. SS assigns resources to the MS to transmit data blocks in the uplink. After receiving data block with BSN=30, SS sends a Packet Uplink Ack/Nack message with SSN=21 and positively acknowledging BSN=21 till BSN=30.
SS assigns resources to the MS. SS verifies that MS ignores the SSN and RB sent in the Packet Uplink Ack/Nack message and continues transmitting new data blocks.
SS allows the MS to complete the data transfer.
Maximum Duration of Test
10 minutes.
Expected Sequence
Step |
Direction |
Message |
Comments |
---|---|---|---|
1 |
{Uplink dynamic allocation two phase access} |
N = 1000 octets USF_GRANULARITY = 1 block EGPRS Channel Coding Command: MCS-1 EGPRS Window Size: 192 |
|
2 |
SS -> MS |
PACKET DOWNLINK DUMMY CONTROL BLOCK |
Sent on the PACCH of the PDCH assigned, containing USF assigned to the MS. |
3 |
MS -> SS |
EGPRS UPLINK RLC DATA BLOCK |
Received on the assigned PDTCH SS verifies that the BSN of the received data block is 0. |
4 |
– |
Repeat Steps 2 and 3 until BSN=30 is received. |
|
5 |
SS |
Wait BS_CV_MAX block periods |
|
6 |
SS -> MS |
PACKET UPLINK ACK/NACK |
SSN=21, Bitmap acknowledging BSN=21 till BSN=30 |
7 |
SS -> MS |
PACKET DOWNLINK DUMMY CONTROL BLOCK |
Sent on the PACCH of the PDCH assigned, containing USF assigned to the MS. |
8 |
MS -> SS |
EGPRS UPLINK RLC DATA BLOCK |
Received on the assigned PDTCH SS verifies that the BSN of the received data block is 31. |
9 |
SS -> MS |
PACKET DOWNLINK DUMMY CONTROL BLOCK |
Sent on the PACCH of the PDCH assigned, containing USF assigned to the MS. |
10 |
MS -> SS |
EGPRS UPLINK RLC DATA BLOCK |
Received on the assigned PDTCH SS verifies that the BSN of the received data block is 32. |
11 |
{Completion of uplink RLC data block transfer} |
53.2.2 Unacknowledged Mode/ Downlink TBF
53.2.2.1 Unacknowledged Mode/ Downlink TBF/ V(R) and V(Q)
53.2.2.1.1 Conformance requirements
In RLC unacknowledged mode, all values of BSN are within the transmit window.
In RLC unacknowledged mode, V(R) shall be set to [ BSN’ + 1 ] modulo SNS, where BSN’ is the BSN of most recently received RLC data block.
In RLC unacknowledged mode, if [V(R) – V(Q)] modulo SNS > WS after updating V(R), then V(Q) is set to [V(R) ‑ WS] modulo SNS.
References
3GPP TS 04.60, subclause 9.1, 9.1.5, 9.1.6
53.2.2.1.2 Test purpose
To verify that in RLC unacknowledged mode, the MS correctly sets V(R) and V(Q) depending upon the BSN of the data block received.
53.2.2.1.3 Method of test
Initial Conditions
System Simulator:
1 cell with EGPRS support, default setting, PBCCH not present.
Mobile Station:
The MS is EGPRS updated with a P-TMSI allocated, SPLIT PG CYCLE negotiated and the test PDP context3 activated.
Specific PICS Statements
–
PIXIT Statements
–
Test Procedure
The SS initiates the establishment of an unacknowledged downlink EGPRS TBF, setting window size value to 192.
SS sends data block with BSN=1, BSN=191 and poll the MS for acknowledgement. SS verifies that SSN=1 and the bitmap contains status of all blocks till BSN=191.
SS sends another data block with BSN=201 and polls the MS for acknowledgement. SS verifies that SSN=11 and the bitmap contains status of all blocks from 11 till 201.
Maximum Duration of Test
10 minutes.
Expected Sequence
Step |
Direction |
Message |
Comments |
---|---|---|---|
1 |
{Downlink TBF establishment} |
Unacknowledged Mode EGPRS Window Size: 192 |
|
2 |
SS -> MS |
EGPRS DOWNLINK RLC DATA BLOCK |
With BSN=1. Sent on the PDCH assigned in Step 1 |
3 |
SS -> MS |
EGPRS DOWNLINK RLC DATA BLOCK |
With BSN=191. Sent on the PDCH assigned in Step 1 MS is polled for FPB |
4 |
MS -> SS |
EGPRS PACKET DOWNLINK ACK/NACK |
Received on PACCH of the assigned PDTCH. SS verifies that the SSN=1 and the bitmap acknowledge blocks with BSN=1 and BSN=191. |
5 |
SS -> MS |
EGPRS DOWNLINK RLC DATA BLOCK |
With BSN=201. Sent on the PDCH assigned in Step 1 MS is polled for FPB |
6 |
MS -> SS |
EGPRS PACKET DOWNLINK ACK/NACK |
Received on PACCH of the assigned PDTCH. SS verifies that the SSN=11 and the bitmap acknowledge blocks with BSN=191 and BSN=201. |
7 |
SS -> MS |
EGPRS DOWNLINK RLC DATA BLOCK |
With BSN=202. FBI set to ‘1’ Sent on the PDCH assigned in Step 1 With a valid RRBP |
8 |
MS -> SS |
PACKET CONTROL ACKNOWLEDGEMENT |
Received on the block specified by RRBP. |