5G System Learning---Location Report Control

1. The purpose of the Location Reporting Control procedure is to allow the AMF to request the NG-RAN node to report the terminal (UE)'s current location, or the last known location (with timestamp), or the UE's location in the target area in the CM-CONNECTED state (as described in TS 23.501 and TS 23.502). This procedure uses UE-related signaling.

2. The successful reporting operation flow is shown in Figure 8.12.1.2-1 below, where:

The AMF initiates this procedure by sending a Location Reporting Control message to the NG-RAN node. Upon receiving the Location Reporting Control message, the NG-RAN node shall perform the requested location reporting control operation for the (UE).

3. The Location Reporting Request Type IE indicates whether the NG-RAN node:

• Reports directly;
• Reports on serving cell change;
• Reports the terminal's (UE's) presence in the target area;
• Stops reporting on serving cell change;
• Stops reporting the terminal's (UE's) presence in the target area;
• Cancels the terminal's (UE's) location reporting;
• Reports on serving cell change and reports the terminal's (UE's) presence in the target area.
• If the Location Reporting Request Type IE in the LOCATION REPORTING CONTROL message includes an Area of ​​Interest List IE, the NG-RAN node shall store this information and use it to track the UE's presence in the Areas of Interest defined in TS 23.502. NOTE: The NG-RAN reports the UE's presence for all Location Reporting Reference ID sets for inter-NG-RAN node handovers. If the Additional Location Information IE is included in the LOCATION REPORTING CONTROL message and is set to "Include PSCell," the NG-RAN node shall include the current PSCell in the report if dual connectivity is activated.
• If Report on Serving Cell Change is requested, the NG-RAN node shall also provide this report when the UE changes PSCell and when dual connectivity is activated.
• If Report on Serving Cell Change is requested, the NG-RAN node shall send the report immediately and whenever the UE's location changes.
• If the Event Type IE is set to "Cess UE presence in area of ​​interest" and if the Additional Cancel Location Reporting Reference ID List IE is included in the Location Reporting Request Type IE in the Location Reporting Control message, the NG-RAN node shall (if supported) stop reporting UE presence for all received location reporting reference IDs.