CATT proposes Msg2 delivery for dedicated monitoring at RAN2 #135-bis

RAN2 is the radio interface protocols working group, and the meeting report covers ambient Internet of Things work. CATT proposed a "dedicated monitoring configuration" for possible negative acknowledgement feedback or an initial reader-to-device command. The proposal ties that monitoring to the device sending its identifier in Msg3, the third random access message. CATT proposed delivering the configuration in Msg2, the second message of random access triggered by paging.

Source: R2-2607033, CATT, 3GPP TSG RAN WG2 #135-bis. © CATT.

Xiaomi, Ericsson, LG Electronics, Panasonic and Apple jointly noted that the configuration "requires additional spec impact". They also noted interaction between the reader and the core network. Our reading: Their observation identifies drawbacks without showing that the joint paper opposed CATT's proposal. The register lists both contributions as available and records no decision on either paper.

Source: R2-2607092, Xiaomi (with Ericsson, LG Electronics, Panasonic, Apple), 3GPP TSG RAN WG2 #135-bis. © Xiaomi, Ericsson, LG Electronics, Panasonic, Apple.

Under the same agenda item, the report records a separate agreement about cycle-based paging monitoring. The agreement states that "the monitoring cycle contains a single on-duration". That on-duration starts based on a reference time determined relative to a sync signal or broadcast information. The possible offset and exact reference-time relation remain for further study. Our reading: That excerpted agreement does not establish acceptance or rejection of the dedicated monitoring proposal.

Source: R2-2607785, Session Chair (MedaTek), 3GPP TSG RAN WG2 #135-bis, meeting report, agenda item 8.2.4.