China Mobile proposes conditional RLF report transfer at RAN3 #133-bis

China Mobile's later contribution was available at RAN3 #133-bis, a radio access network working group 3 meeting. Both papers concern mobility robustness optimization (MRO) for layer one and layer two triggered mobility (LTM) between central units. Their titles identify this scope as inter-CU LTM.

At RAN3 #133, China Mobile proposed: "For subsequent LTM, transfer the RLF report to the initiating gNB". That proposal names the initiating gNB, a base station, as the report's recipient. China Mobile proposed the transfer to enable optimization of LTM configuration. The RAN3 #133 register marked that contribution not treated.

Source: R3-263462, China Mobile, 3GPP TSG RAN WG3 #133. © China Mobile.

At RAN3 #133-bis, the later Proposal 1 named the last serving node as sender. The proposed condition involves the re-connecting cell of user equipment (UE). China Mobile proposed transfer in this case: "if the node which includes the UE re-connecting cell has Xn interface with initiating node". Xn is the interface linking that cell's node and the initiating node in this case. Our reading: The later Proposal 1 specifies a sender and Xn condition absent from the earlier Proposal 1. The RAN3 #133-bis register records no decision on that contribution.

Source: R3-264213, China Mobile, 3GPP TSG RAN WG3 #133-bis. © China Mobile.