R1-2603184
discussion
Discussion on LS on capability reporting for PRS Processing Window
From Ericsson
Ericsson's prior position on
5
at
RAN1#118bis
· AI-synthesized, paraphrased
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Advocates for inclusion of UE-side data collection capabilities for UE-side model training in AI/ML applications, supporting RAN2's endorsement and requesting incorporation into technical report TR 38.843.
Summary
Ericsson responds to RAN2's inquiry regarding the reporting targets for specific UE capabilities related to PRS Processing Windows (PPW) in NR AIML positioning. The document contains two distinct proposals addressing whether capabilities 58-2-11, 58-2-9, and 58-2-10 should be known by the gNB, the LMF, or both, based on legacy Rel-17 precedents.
Position
Ericsson proposes that capability 58-2-11 should be known only to the gNB, arguing that this mirrors the legacy Rel-17 feature which is sent only to the gNB since it impacts the enabling of PPWs via RRC signaling. They further propose that capabilities 58-2-9 and 58-2-10 should be known to both the gNB and the LMF. Ericsson argues that since AIML-case1 positioning mirrors DL-TDOA configuration, these capabilities should follow the same principles as legacy features for gapless measurements (capabilities 27-3-2 and 27-3-3), which are reported to both nodes to inform of the types of priority handling the UE supports. They emphasize that in legacy PPW configuration, details are known to the gNB so that the gNB can configure the PPW configuration as per UE capability.
Key proposals
- Proposal 1 (Sec Introduction): Capability 58-2-11 should be known only to the gNB, mirroring the legacy Rel-17 behavior where the feature impacts enabling of PPWs via RRC signaling.
- Proposal 2 (Sec Introduction): Capabilities 58-2-9 and 58-2-10 should be known to both the gNB and the LMF, following the same principles as legacy features for gapless measurements (capabilities 27-3-2 and 27-3-3).
- Observation 1 (Sec Introduction): Legacy Rel-17 capability 27-23 is sent only to the gNB because it only impacts the enabling of PPWs via RRC signaling.
- Observation 2 (Sec Introduction): AIML-case1 positioning mirrors DL-TDOA configuration, implying that capabilities should be reported to the same nodes as the legacy feature.
- Observation 3 (Sec Introduction): Legacy capabilities 27-3-2 and 27-3-3 are sent to both gNB and LMF to inform of the types of priority handling the UE supports.
- Observation 4 (Sec Introduction): In legacy PPW configuration, details are known to the gNB so that the gNB can configure the PPW configuration as per UE capability.
- Observation 5 (Sec References): The document references R1-2601764 as the source LS from RAN2 requesting feedback on capability reporting.
- Observation 6 (Sec References): The document references R1-2506627 in the context of capability 58-2-11.
- Observation 7 (Sec LS from R1-2601764): RAN2 notes that capability 58-2-9 and 58-2-10 were previously set to N/A for the field 'Need for the gNB to know if the feature is supported'.
- Observation 8 (Sec LS from R1-2601764): RAN2 seeks confirmation on whether capability 58-2-11 should be known only to gNB or both gNB and LMF.
- Observation 9 (Sec LS from R1-2601764): RAN2 seeks confirmation on whether capability 58-2-9 and 58-2-10 should also be known to gNB or not.
- Observation 10 (Sec LS from R1-2601764): RAN2 observes that for legacy non-AIML positioning, capability 27-23 is sent only to gNB.
- Observation 11 (Sec LS from R1-2601764): RAN2 states that in legacy PPW config, details are known to gNB so that gNB can configure the PPW configuration as per UE capability.
- Observation 12 (Sec LS from R1-2601764): RAN2 asks RAN1 to provide feedback on the above questions regarding capability reporting targets.
- Observation 13 (Sec LS from R1-2601764): RAN2 identifies capability 58-2-11 as 'Support of more than one activated PRS processing windows across all active DL BWPs'.
- Observation 14 (Sec LS from R1-2601764): RAN2 identifies the overall description as seeking feedback on capability 58-2-11 from RAN1.