UE-reader ID proposals: paired identifiers and option 3 at RAN3 #133-bis

RAN3 #133-bis, a radio network interfaces working-group meeting, received proposals about reader identification in ambient Internet of Things Topology 2. China Mobile's specification 38.300 baseline change-request text proposed the AMF UE NGAP ID and RAN UE NGAP ID as the reader identifier. CATT separately proposed that same pair to identify a user equipment reader. AMF means access and mobility management function, while UE means user equipment and ID means identifier. RAN means radio access network, and NGAP means NG Application Protocol.

Qualcomm proposed "Deprioritize Option 3" for representing the reader identifier in NGAP. Qualcomm defined that option as a new core-network-allocated user equipment reader identifier. Nokia proposed to "rule out UE Reader ID design option 3". Our reading: Only Qualcomm's excerpt defines option 3, so the shared label does not establish an identical design.

Sources: R3-264446, Qualcomm, 3GPP TSG RAN WG3 #133-bis. © Qualcomm. R3-264350, Nokia, 3GPP TSG RAN WG3 #133-bis. © Nokia.

The meeting report excerpt for agenda item 14.2 records a working assumption about unavailable user equipment readers. The assumption applies if the next-generation radio access network cannot use some provided readers for a specific ambient Internet of Things service operation. That radio access network may notify the ambient Internet of Things function with information on those unavailable readers. Our reading: The excerpt records no agreement on the user equipment reader identifier design.