3GPP TSG RAN WG1 #121 R1-2503368
St Julian’s, Malta, May 19th – 23th, 2025
Source: vivo
Title: Updated RRC parameters for Rel-19 LP-WUS/WUR
Agenda Item: 9.6
Document for: Discussion and Decision
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3GPP TSG RAN WG1 #121 R1-2504909
St Julian’s, Malta, May 19th – 23rd, 2025
Agenda Item: 9.6
Source: Rapporteur(vivo)
Title: Summary of RAN1 agreements on LP-WUS/WUR for NR
Document for: Discussion and Decision
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Conclusion
From RAN1 perspective, for the case of potential collision (if any) in Option 1-2, when the UE is not able to monitor all the LP-WUS MO(s) in a LP-WUS periodicity,
It is up to RAN2 to further discuss and finalize the specification support, if any.
Agreement
For the UE capability report on the minimum time gap between the end of the last symbol of LP-WUS and the time where MR starts PDCCH monitoring regardless of SCS, the same candidate values {V1, V2, V3} are supported for different receiver types
V1=5ms
V2=13ms
V3=37ms
Agreement
For the UAI of preferred time offset for LP-WUS monitoring in RRC connected mode,
The candidate values are same as those for the UE capability of minimum time gap, i.e., {V1=5, V2=13, V3=37}ms
The reported UAI value is equal to or longer than the minimum time gap reported by UE capability for a UE
Note: There is no change to the RAN1 agreed definition for UAI
R1-2504886 FL summary #4 on LP-WUS operation in CONNECTED mode Moderator (NTT DOCOMO)
R1-2504887 Draft reply LS on LP-WUS in RRC_CONNECTED Moderator (NTT DOCOMO)
Final reply LS on LP-WUS in RRC_CONNECTED is endorsed in R1-2504888
Agreement
Nominal MO duration (X1, in unit of OFDM symbols) and actual LP-WUS duration (X2, in unit of OFDM symbols) are configured for LP-WUS in connected mode. (Alt C)
A LP-WUS MO spans the nominal MO duration (i.e., the LP-WUS MO duration is the same as the nominal MO duration.)
If the number of available OFDM symbols within the nominal MO duration is no less than the actual LP-WUS duration, UE monitors LP-WUS on the first X2 available symbols within the LP-WUS MO.
Otherwise, UE does not monitor LP-WUS in this MO (i.e., the MO is dropped).
Note: Any symbols that are not defined as unavailable are available symbols for LP-WUS.
Further discuss possible introduction of UE capability to restrict configuration of LP-WUS MO and LP-WUS duration. For example,
A LP-WUS spans a number of consecutive OFDM symbols according to the configured LP-WUS duration
If there is at least one OFDM symbol unavailable for the LP-WUS MO within the OFDM symbols where the LP-WUS would span, the UE does not monitor the LP-WUS in the MO
Agreement
For UE to determine whether a symbol is available for LP-WUS in connected mode, at least the following is supported:
A unit level bitmap with a periodicity 10, 20, or 40 units and a 14-bit or 28-bit symbol-level bitmap that covers 1 or 2 slots can be configured, where each unit is 1 or 2 slots for 14-bit or 28-bit symbol-level bitmap, respectively, with a maximum periodicity of 40ms.
‘1’ in unit-level bitmap means the symbol level bitmap is applied to determine which symbols are unavailable in the unit for LP-WUS (‘0’ means unavailable).
‘0’ in unit-level bitmap means: all the symbols in the unit are unavailable for LP-WUS
If the slot-level bitmap is not configured, UE assumes all 1’s for the bitmap.
If the symbol-level bitmap is not configured, UE assumes all 1’s for the bitmap.
Agreement
For the handling of at least PCell/PSCell SSB for connected mode, the SSB symbols are considered as unavailable for LP-WUS
Agreement
The UL symbols/slots configured in tdd-UL-DL-configurationCommon or tdd-UL-DL-ConfigurationDedicated are considered as unavailable for LP-WUS in connected mode
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3GPP TSG RAN WG1 #121 R1-2504956
St Julian’s, Malta, May 19th – 23th, 2025
Source: vivo (WI rapporteur)
Title: Summary of discussion on RRC parameters for Rel-19 LP-WUS/WUR
Agenda Item: 9.6
Document for: Discussion and Decision
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Conclusion
Based on the discussions, final versoin of RRC parameter list for Rel-19 LP-WUS/WUR is given, as attached in this contribution. The changes relative to the last version sent to RAN2 (in R1-2503155, “Consolidated Rel-19 higher layers parameters list Post RAN1#120bis”) are shown in red.
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