12.3 Retransmission Procedures

25.2143GPPPhysical layer procedures (FDD)Release 17TS

If the Node B schedules three transport blocks in any transmission, for retransmissions the second transport block and the third transport block are re-transmitted with the same HARQ process identifier as defined in [2]. If the Node B schedules four transport blocks in any transmission, for retransmissions the primary transport block and the fourth transport blocks are re-transmitted with the same HARQ process identifier as defined in [2], retransmissions the second transport block and the third transport block are re-transmitted with the same HARQ process identifier as defined in [2].

– If the Node B schedules two or three transport blocks, the transport block size information of the primary transport block is set to ‘111111’ and if X_rvpb is set to 0, then the primary transport block is not transmitted.

– If the Node B schedules two transport blocks, the transport block size information of the second transport block is set to ‘111111’ and if X_rvsb is set to 0, then the second transport block is not transmitted.

– If the Node B schedules three or four transport blocks, the transport block size information of the second and the third transport block is set to ‘111111’ and if X_rvsb is set to 0, then the second and the third transport block are not transmitted.

– If the Node B schedules four transport blocks, the transport block size information of the primary transport block and fourth transport block is set to ‘111111’ and if X_rvpb is set to 0, then the primary and the fourth transport block are not transmitted.

– When the number of transport blocks is equal to 2 or 3, X_rvpb = 0 and if the transport block size information of the primary transport block is equal to ‘111111’ the UE shall discard the received data on the primary transport block, should assume that the primary transport block had been successfully decoded and generate a positive acknowledgement for the primary transport block in this HARQ process. Node B should assume positive acknowledgement has been received for this HARQ process.

– When the number of transport blocks is equal to 2, X_rvsb = 0 and if the transport block size information of the second transport block is equal to ‘111111’ the UE shall discard the received data on the second transport block, should assume that the second transport block had been successfully decoded and generate a positive acknowledgement for the second transport block in this HARQ process. Node B should assume positive acknowledgement has been received for this HARQ process.

– When the number of transport blocks is equal to 3 or 4, X_rvsb = 0 and if the transport block size information of the second and the third transport block is equal to ‘111111’ the UE shall discard the received data on the second and the third transport blocks, should assume that the second and the third transport blocks had been successfully decoded and generate a positive acknowledgement for the second and the third transport blocks in this HARQ process. Node B should assume positive acknowledgement has been received for this HARQ process.

– When the number of transport blocks is equal to 4, X_rvpb = 0 and if the transport block size information of the primary and the fourth transport block is equal to ‘111111’ the UE shall discard the received data on the primary and the fourth transport blocks, should assume that the primary and the fourth transport blocks had been successfully decoded and generate a positive acknowledgement for the primary and the fourth transport blocks in this HARQ process. Node B should assume positive acknowledgement has been received for this HARQ process.