Draft report ran wg4

R4-021420 LS on Reference configurations in TS 34.108 (TSG RAN WG2, R2-022204)

This LS is sent to T WG1, RAN WG4 and WG1.

WG2 has clarified 25.331 so the UE can make SIR target adjustments without having CRC in all transport formats in the TFCS. WG2 asks T WG1 to update the configuration of any of the RABs in a proposed list to a TFCS where all TF have CRC.

No actions required from WG4

Decision: The LS is noted
R4-021421 Response to LS (S4-020468) on Rate Adaptation of AMR Codec (TSG RAN WG2, R2-022423)

This LS is sent to SA WG4 cc RAN WG4.

The AMR rate selection behaviour is not specified in SA WG AMR specification, the issue is briefly covered the MAC specification and the requirements specification (25.133). WG2 believes that this issue should be handled in the AMR spec and not in the radio specs, and asks SA WG4 to reconsider the issue. WG2 ask also for clarification on the selection behaviour in case of rapidly degrading radio conditions, that would force a quick rate change of several steps.