NR-U Inactive and Idle procedures (Candidates)
Note: NR-Unlicensed is still in the study phase with barely any work done on the TS. It is expected that by 2022 (so Release 18) we may see some specification for the 6GHz band in Europe. As of now, only potential candidates for NR-U implementation can be guessed.
Inactive and Idle procedures (Candidates)
For
Inactive and Idle mode procedures, Rel-15 NR design is considered as the
baseline and as such, NR licensed measurement framework
(cell and beam quality derivation for RSRP, RSRQ, and SINR, filtering and
combining multiple beams) is also used as the baseline.
The UE measurements in Idle/Inactive mode will mostly assume recurring transmissions of SSB/PBCH and RMSI but possibly with reduced opportunities due to LBT.
In
unlicensed bands, multiple PLMNs can use the same carriers without any
coordination. Therefore, the best cell found by a UE on a frequency may not
belong the registered PLMN. In this case, the UE can be enabled to camp on a
non-best cell on a carrier if the best cell does not belong to the registered
PLMN (or E-PLMN), where the non-best cell would still be the best cell of the
registered PLMN.
For paging,
it may be beneficial to introduce more opportunities per DRX cycle for the UE
to receive the page. The additional locations can be provided in time domain by
configuring an extended paging occasion (i.e. a paging window) or configuring
multiple paging occasions to a UE. In any specified solution(s) based on
additional paging opportunities, the UE power
consumption will also be taken into account, so it would be beneficial
that the paging occasions are transmitted in close time to or overlap with the
reference signals.
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