Need for sctp stream id value from AMF for UE Id thread mapping at RAN
Hi, We are testing the UE registration flow using our RAN+UE emulator with OAI-Core. During the testing observed that the AMF is sending Authentication Request to the UE on Downlink NAS transport. However, in this message the SCTP stream id seems 0. We send the initialUE message with registration request on some SCTP stream id 'X' which in the current flow is 1. We think that it would be good if the AMF responds back with the same stream id which was sent in the initialUE message for the corresponding UE, as we use this stream id for UE ID to thread mapping at RAN+UE emulator in a multi-ue testing. Attached please find the pcap. Currently due to this mismatch, we are unable to identify the UE at the emulator. sctp-streamid.pcapng