NTN Indication and UE Location in 5G and IoT Architectures
Background information on the inclusion of indication of country of UE location in network messages for PLMN selection in 5G and IoT architectures. Discussions on the necessity, impact, and decisions regarding this indication, along with ongoing proposals and requirements. Consideration of factors such as UE awareness of location, positioning methods, and implementation dependencies in NTN systems.
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Way Forward on Way Forward on NTN Indication of Country of UE Location 5GSAT_ARCH, IoT_SAT_ARCH_EPS
Background TDocs [1/2] Incoming LSs S2-2200043 (C1-217150) on use, if any, of network provided Indication of country of UE location S2-2108994 (S1-214208) on Indication of country of UE location and its use in PLMN selection S2-2200080 (C1-220532) Reply LS on EPS support for IoT NTN in Rel-17 Outgoing LSs S2-2200869 [DRAFT] Reply LS on Use, if any, of network provided Indication of country of UE location S2-2200394 [DRAFT] Reply LS on Indication of country of UE location and its use in PLMN selection S2.2200440 Reply LS on Use, if any, of network provided 'Indication of country of UE location S2-2200567 [DRAFT] Reply LS on Use, if any, of network provided 'Indication of country of UE location S2-2200946, [DRAFT] Reply LS on Use, if any, of network provided 'Indication of country of UE location' S2-2200871 [DRAFT] Reply LS on EPS support for IoT NTN in Rel-17 >> Proposed to be merged with 869 S2-2200571 [DRAFT] Reply LS on EPS support for IoT NTN in Rel-17 >> Proposed to be merged with 869
Background TDocs [2/2] CRs (5GSAT_ARCH) S2-2200937 23.501 CR 3549 (Rel-17, F ): Remove indication of country of UE location for NR satellite access S2-2200938 23.502 CR 3390 (Rel-17, F ): Remove indication of country of UE location S2-2200438: 23.501 CR 3502 (Rel-17, F ): Removal of indication of country of UE location S2-2200439: 23.502 CR 3352 (Rel-17, F ): Removal of indication of country of UE location S2-2200867: 23.501 CR 3544 (Rel-17, C ): Remove indicaiton of country of UE location from TS23.501 S2-2200868: 23.502 CR 3384 (Rel-17, C ): Remove indicaiton of country of UE location from TS 23.502 S2-2200395: 23.501 CR 3497 (Rel-17, F ): NR NTN: Removal of Country of UE Location S2-2200396: 23.502 CR 3349 (Rel-17, F ): NR NTN: Removal of Country of UE Location S2-2200569: 23.501 CR 3520 (Rel-17, F ): The requirement of the indication of the UE location CRs (IoT_SAT_ARCH_EPS) S2-2200397 23.401 CR 3682 (Rel-17, F ): ): IoT NTN: Removal of Country of UE Location
Background SA2 had decided to include an indication of country of UE location in Reject message from AMF/MME to assist UE s PLMN selection in case the UE had selected a PLMN in a country where the PLMN is not allowed to operate SA2 decision was based on assumptions in TR23.737 that are now obsolete: it cannot be assumed that all UEs would be aware of their location. Even if the UE knows its location, the positioning methods, frequency and accuracy of location measurements are UE implementation dependent NTN UEs do support GNSS and are required to determine their location. RAN4 req. are also being defined. SA1 (S1-214208) [quote] do not see the purpose of Indicated country of UE location There is no impact of the indicated country of UE location on the PLMN selection procedures CT1 (C1-217150) Request SA2 to provide their requirement on the use of Indication of country of UE location or to remove that indication if no stage 2 requirement(s) exist
Way forward It is proposed to agree the following way forward at this meeting Remove the Indicated country of UE location from Stage 2 both for NR NTN and IoT NTN (23.401/501/502) Respond to SA1, CT1 accordingly
