A.2 Differences in Information Storage in the UDR/UDM versus HSS/GMLC for EPS

23.2733GPP5G System (5GS) Location Services (LCS)Release 18Stage 2TS

Table A.2-1 shows a list of LCS information storage items for a UE in the UDR and UDM defined in this TS and for the HSS and/or GMLC defined in TS 23.271 [4], differences if any between this TS and TS 23.271 [4], and comments on these including any significant consequences.

Table A.2-1: Differences in Information Storage for a UE in the UDR/UDM versus HSS/GMLC for EPS

Information Storage Item(s)

Difference

Comments

UE Privacy Universal Class

Not supported in this TS

This privacy class should not be supported for 5GC capable UEs on the EPS side to avoid differences in LCS privacy support between EPS access and 5GS access for the same UE. (Note 1)

UE Location Privacy Indication

Not supported in TS 23.271 [4]

This indication can create differences between LCS client access to a UE which has 5GS access versus EPS access. (Note 1)

UE Privacy Call/Session related Class

Not supported in this TS

This privacy class should not be supported for 5GC capable UEs on the EPS side to avoid differences in LCS privacy support between EPS access and 5GS access for the same UE. (Note 1)

UE Privacy Call/Session unrelated Class

Supported as defined in TS 23.271 [4] with the following differences:

– Information related to an RGMLC is not included

– An optional time period is not supported in TS 23.271 [4]

– An optional geographic area is not supported in TS 23.271 [4]

This privacy class can create differences between LCS client access to a UE which has 5GS access versus EPS access. (Note 1)

UE Privacy PLMN Operator Class

None

UE LCS Mobile Originating Data

None

NOTE 1: A PLMN operator can avoid any difference in UE privacy support for EPS access versus 5GS access by only storing information for UE privacy (in the UE LCS privacy profile) in a UDR (and UDM) and not in an HSS or GMLC.