R1-2600126
discussion
Discussion on WUS operation in RRC states for 6GR
From Spreadtrum
Summary
Spreadtrum presents 7 proposals and 3 observations on 6G DL WUS operation, focusing on avoiding NR's duplicated functionalities by introducing only one DL-WUS type per RRC state. The document addresses procedures for paging/PDCCH triggering, subgrouping, occasion configuration, wake-up delay, and RRM measurements in low-power mode.
Position
Spreadtrum proposes that 6GR should avoid the duplicated DL-WUS functionalities introduced across NR releases by defining only one DL-WUS type per RRC state (Proposals 1 and 6). They propose using NR mechanisms as a starting point for wake-up delay and DL WUS occasion configuration (Proposals 3 and 4). For RRM measurements, they require that a UE in EE mode can perform serving cell RRM measurements using SSB or LP-SS in a low-power mode under certain signal quality conditions (Proposal 5). They support extending the payload size for finer subgrouping granularity and advocate for multi-beam operation via DL WUS occasions composed of multiple monitoring occasions (Proposal 2). For connected mode, they propose adopting NR's Option 1-1 and Option 1-2 as the basis for triggering PDCCH monitoring via LP-WUS (Proposal 7).
Key proposals
- Proposal 1 (Sec DL WUS operation in RRC idle/inactive mode): For 6GR, only one type of DL-WUS should be introduced in idle mode.
- Proposal 2 (Sec DL WUS occasion): DL WUS occasion can to be introduced and one DL WUS occasion consists of multiple DL WUS monitoring occasion.
- Proposal 3 (Sec Wake up delay): For wake up delay, NR mechanism can be a starting point.
- Proposal 4 (Sec Configuration of DL WUS occasion): For DL WUS occasion configuration, NR mechanism can be as a starting point.
- Proposal 5 (Sec Measurements and/or synchronization): UE in EE mode should be able to perform RRM measurements (at least for the serving cell) with the follow 6GR sync signal(s): SSB, LP-SS (if introduced).
- Proposal 6 (Sec WUS operation in RRC connected mode): For 6GR, only one type of DL-WUS should be introduced in connected mode.
- Proposal 7 (Sec DL-WUS Procedures to trigger PDCCH monitoring): For LP-WUS operation in connected mode, Option 1-1 and Option 1-2 in NR can be used as a starting point.