Content for TS 23.434 Word version: 19.0.0

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9.3.11 Monitoring Location Deviation 9.3.12 Location area monitoring information procedure 9.3.12.1 Location area monitoring subscribe procedure 9.3.12.2 Location area monitoring subscribe modify procedure 9.3.12.3 Location area monitoring unsubscribe procedure 9.3.12.4 Location area monitoring notification procedure
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9.3.11 Monitoring Location Deviation |R17| p. 74

9.3.11.1 General p. 74

The VAL server requests the Location Management Server to monitor the location of the VAL UE in relation to an area of interest. The LMS fetches the VAL UE's location information periodically from 3GPP core network as specified in TS 23.502 and also, using the Location Information procedures specified in clause 9.3.7 and clause 9.3.10. With the periodic location information of the UE from 3GPP core network and SEAL procedures, the LMS server evaluates the current location of the VAL UE in relation to the area of interest configured by the VAL server. If subscribed, the VAL server is notified by the LMS server when the VAL UE relationship (e.g. inside or outside) to the area of interest changes along with current location information of the VAL UE.

9.3.11.2 Monitoring Location Deviation procedure p. 74

Figure 9.3.11.2-1 describes the procedure for monitoring the VAL UE's location in a given area of interest.

Pre-condition:

The LM server authorized to consume the 3GPP core network service (Monitoring events provided by NEF as specified in TS 23.502).

Reproduction of 3GPP TS 23.434, Fig. 9.3.11.2-1: Monitoring VAL UE's location at a given location

Figure 9.3.11.2-1: Monitoring VAL UE's location at a given location

Step 1.

The VAL server sends Monitor Location Subscription Request to LM server including VAL UE Identifier, predetermined area of interest information, notification interval and notification URI where the VAL server intends to receive the notifications from LM server regarding VAL UE's presence in a given area.

"Area of interest" is the location information, which the VAL server wishes to monitor the VAL UE's location adherence. This parameter can include an area of interest information and other relevant parameters.
"Notify_Interval" represents the periodic interval in which the LM server needs to notify VAL UE's location information to the VAL server. When the VAL UE moves away from the "Area of interest", then the LM server ignores the "Notify_Interval" and sends the location notification to the VAL server immediately.

Step 2.

LM server processes the Area of interest information in the request, and then subscribes to UE location monitoring as specified in TS 23.502 with appropriate parameters mapping. Based on the subscription, the LM server receives the VAL UE location information periodically from the 3GPP core network. The LM server also invokes NEF service for Area of Interest monitoring as specified in clause 5.3.3 of TS 23.256 to know whether the VAL UE is in the VAL server's predetermined area of interest.

Step 3.

LM server shall use the Location information procedures as specified in clause 9.3.7 and clause 9.3.10, to periodically obtain the VAL UE location information. Based on the geographic information from the VAL server, the LM server may determine to additionally include the positioning methods in SEAL LMS procedures to obtain location information.

Step 4.

LMS may periodically obtain the VAL UE location information from the 3rd party location management server based on the geographic information from the VAL server.

Step 5.

LM server, after successful subscription according to steps 2~4, sends Monitor Location Subscription response, indicating that the LM server accepts VAL server's request and will monitor the location of the VAL UE to verify if the VAL UE is in the area of interest.

Step 6a and 6b.

LM server processes the location information received from SEAL Location Information procedures, the 3GPP core network and/or the 3rd party location management server, and validates the information. If the location information is matching, then the LM server shall check if the VAL UE's current location is within the predetermined area of interest received in step 1.

Step 6c.

LM server verifies its determined VAL UE location status (i.e. presence or absence with regard to the predetermined area of interest) with the retrieved 3GPP core network result from the NEF monitoring service for Area of Interest. The LM server will continue with step 7, step 8 and step 9 as applicable.

Step 7.

If the location information received from Location management client, the 3GPP core network and/or the 3rd party location management server do not match or the NEF reported Area of Interest monitoring result does not match with the determined VAL UE location status (present/absence) in LM server, then the LM server shall consider the VAL UE as outside from its specified area of interest and shall notify ("Notify Mismatch Location" message) the VAL server of the same, including VAL UE ID and the location information from LM server,the 3GPP core network and/or the 3rd party location management server in the notification message.

Step 8.

If the VAL UE's current location is from Location management client, the 3GPP core network and/or the 3rd party location management server matches, and not in the area of interest received from VAL server in Monitor Location Subscription Request message, and such out of area of interest result is also aligned with the NEF reported area of interest monitoring result, then the LM server considers the VAL UE as outside from its specified area of interest and shall notify the VAL server that the VAL UE's current location is outside of area of interest and VAL UE ID in "Notify Absence" message.

Step 9.

When the VAL UE's current location is in area of interest, and such in area of interest result is also aligned with the NEF reported area of interest monitoring result, then the LM server shall notify ("Notify Presence" message) the VAL server periodically, according to the "Notify_Interval" value in "Monitor Location Subscription Request" message, indicating the VAL server that the VAL UE is within the area of interest, along with VAL UE's current location information.

9.3.12 Location area monitoring information procedure |R17| p. 76

9.3.12.1 Location area monitoring subscribe procedure p. 76

Figure 9.3.12.1-1 illustrates the high level procedure of location area monitoring subscription request. The same procedure can be applied for location management client and other SEAL servers that would like to subscribe to the list of UEs moving in or moving out of the specific location area. The subscribe request can be for a reference UE for which the subscriber is authorized to monitor location information.

Reproduction of 3GPP TS 23.434, Fig. 9.3.12.1-1: Location area monitoring subscription procedure

Figure 9.3.12.1-1: Location area monitoring subscription procedure

Step 1.

The VAL server sends a location area monitoring subscription request to the location management server to subscribe to the list of UEs moving in or moving out of the specific location area. In the request message, the VAL server includes the information as specified in Table 9.3.2.14-1. The location information criteria may include the geographic location information or the VAL service area identified by the VAL service area ID where the UEs moving in or moving out to be monitored, or it may include reference UE information where in the UEs moving in or moving out of given application defined proximity range from the reference UE (target UE) to be monitored. The reference UE information may include VAL UE ID.

Step 2.

The location management server shall check if the VAL server is authorized to initiate the location area monitoring subscription request.

Step 3.

The location management server replies with a location area monitoring subscription response indicating the subscription status. In the response message, the location management server includes the information as specified in Table 9.3.2.15-1.

9.3.12.2 Location area monitoring subscribe modify procedure p. 77

Figure 9.3.12.2-1 illustrates the high level procedure of location area monitoring subscribe modify request. The same procedure can be applied for location management client and other SEAL servers that would like to modify the subscription to the list of UEs moving in or moving out of the specific location area. The subscribe modify request can be for a reference UE for which the subscriber is authorized to monitor location information.

Reproduction of 3GPP TS 23.434, Fig. 9.3.12.2-1: Location area monitoring subscription modify procedure

Figure 9.3.12.2-1: Location area monitoring subscription modify procedure

Step 1.

The VAL server sends a location area monitoring subscription modify request to the location management server to modify the subscription to the list of UEs moving in or moving out of the specific location area. In the request message, the VAL server includes the information as specified in Table 9.3.2.17-1.

Step 2.

The location management server shall check if the VAL server is authorized to initiate the location area monitoring subscription modification request.

Step 3.

The location management server replies with a location area monitoring subscription modify response indicating the subscription status. In the response message, the location management server includes the information as specified in Table 9.3.2.18-1.

9.3.12.3 Location area monitoring unsubscribe procedure p. 77

Figure 9.3.12.3-1 illustrates the high level procedure of location area monitoring unsubscribe request. The same procedure can be applied for location management client and other SEAL servers that would like to unsubscribe to the list of UEs moving in or moving out of the specific location area. The unsubscribe request can be for a reference UE for which the subscriber is authorized to monitor location information.

Reproduction of 3GPP TS 23.434, Fig. 9.3.12.3-1: Location area monitoring unsubscribe procedure

Figure 9.3.12.3-1: Location area monitoring unsubscribe procedure

Step 1.

The VAL server sends a location area monitoring unsubscrbe request to the location management server to unsubscribe to the subscription to the list of UEs moving in or moving out of the specific location area. In the request message, the VAL server includes the information as specified in Table 9.3.2.19-1.

Step 2.

The location management server replies with a location area monitoring unsubscrbe response indicating the subscription status. In the response message, the location management server includes the information as specified in Table 9.3.2.20-1.

9.3.12.4 Location area monitoring notification procedure p. 78

Figure 9.3.12.4-1 illustrates the high level procedure of location area monitoring notification. The same procedure can be applied for location management client and other SEAL servers who have subscribe to the list of the UEs moving in or moving out of the specific location area.

Reproduction of 3GPP TS 23.434, Fig. 9.3.12.4-1: Location are monitoring notification procedure

Figure 9.3.12.4-1: Location are monitoring notification procedure

Step 1.

One of the events occurs at the location management server as specified in the subscribe request. The location management server identifies the UEs which are moved into the area or moved out of the area based on their location data and time stamp of the location. The LMS may report the list of all UEs in the given location or UEs moved in and moved out.

Step 2.

The location management server sends a location area monitoring notification to the VAL server. In the notification message, the location management server includes the information as specified in Table 9.3.2.16-1.