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Support #4657
closedPCU_Tests: Add test to verify MS can ask for a new TBF using Est field in the PACKET UPLINK ACK/NACK
Start date:
07/07/2020
Due date:
% Done:
100%
Spec Reference:
Description
3GPP TS 44.060 sec "9.3.2.4.2 Non-extended uplink TBF mode":
When the mobile station has sent the RLC data block with CV = 0 and there are no elements in the V(B) array set to the value Nacked, it shall start timer T3182 for this TBF. The mobile station shall continue to send RLC data blocks on each assigned uplink data block, according to the algorithm defined in sub-clause 9.1.3. If the network has received all RLC data blocks when it detects the end of the TBF (i.e. when CV=0 and V(Q) = V(R)), it shall send the PACKET UPLINK ACK/NACK message with the Final Ack Indicator bit set to '1', include a valid RRBP field in the RLC/MAC control block header and clear counter N3103 for the TBF. The network may use the TBF Est field in the PACKET UPLINK ACK/NACK message to allow the mobile station to request the establishment of a new uplink TBF if there are no additional TBFs ongoing for that mobile station. If the network has not received all of the RLC data blocks when it detects the end of the TBF, it shall send a PACKET UPLINK ACK/NACK message to the mobile station and if necessary allocate sufficient uplink resources for the mobile station to retransmit the required RLC data blocks.
It then further explains what are the possibilities for the MS to request a new TBF. In our case:
If Control Ack Type parameter in System Information indicates acknowledgement is RLC/MAC control block, the mobile station shall transmit the PACKET RESOURCE REQUEST message and start timer T3168 for the TBF request. The mobile station shall use the same procedures as are used for TBF establishment using two phase access described in sub-clause 7.1.3 starting from the point where the mobile station transmits the PACKET RESOURCE REQUEST message.
So it should be easy to add a test requesting a UL TBF, then sending a few blocks until CV=0, then see what the network sends us upon last UPLINK ACK message and send a PKT Resource Request, and submit some more UL data.
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