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Content for  TS 23.434  Word version:  18.0.0

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9.3.6  Location reporting triggers configuration cancelWord‑p. 52

Figure 9.3.6-1 illustrates the procedure used for cancelling the location reporting triggers configuration at the target Location management client.
Pre-conditions:
  1. The location management server has subscribed the location management client 2 location with the location reporting event triggers.
  2. If multicast delivery mode is used, the MBMS bearer being used is activated by the location management server.
Reproduction of 3GPP TS 23.434, Fig. 9.3.6-1: Location reporting triggers configuration cancel
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Step 1.
The location management client 1 (authorized VAL user or VAL UE) or VAL server sends a location reporting configuration cancel request to the location management server (1a). The location management server sends the location reporting configuration cancel request to the location management client 2 to stop receiving the UE location information (1b). This message can be sent via unicast or multicast.
Step 2.
The location management client invalidates the location reporting triggers configuration and no longer reports its location to the location management server.
Step 3.
The location management client 2 sends the location reporting configuration cancel response to the location management server (3a) as an acknowledgement. The location management server sends the location reporting configuration cancel response to the location management client 1 (3b) as an acknowledgement.
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9.3.7  Location information subscription procedureWord‑p. 53

Figure 9.3.7-1 illustrates the high level procedure of location information subscription request. The same procedure can be applied for location management client and other entities that would like to subscribe to VAL user or VAL UE location information. This procedure is also used for intiating tracking a UE's location.
Reproduction of 3GPP TS 23.434, Fig. 9.3.7-1: Location information subscription request procedure
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Step 1.
The VAL server sends a location information subscription request to the location management server to subscribe location information of one or more VAL users or VAL UEs. The request may include an indication for supplementary location information.
Step 2.
The location management server shall check if the VAL server is authorized to initiate the location information subscription request. Further, the location management server may initiate location reporting configuration with the location management client of the UE for immediate reporting.
Step 3.
The location management server may optionally subscribe for UE location information from 3GPP core network for the UE. If the indication for supplementary location information is included in step 1, then UE location information is obtained from the 3GPP core network.
Step 4.
The location management server determines the UE location information of the UE as received in steps 3 and 4.
Step 5.
The location management server replies with a location information subscription response indicating the subscription status and if immediate reporting was requested, the location information of the VAL UE(s).
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9.3.8  Event-trigger location information notification procedureWord‑p. 54

Figure 9.3.8-1 illustrates the high level procedure of event-trigger usage of location information. The same procedure can be applied for location management client and other entities that would like to subscribe to location information of VAL user or VAL UE. This procedure is also used for obtaining latest UE's location for tracking purpose.
Reproduction of 3GPP TS 23.434, Fig. 9.3.8-1: Event-trigger usage of location information procedure
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Step 1.
The location management server receives the latest location information of the UE as per the location report procedure described in clause 9.3.3.3.
Step 2.
The location management server may optionally receive the location information of the UE from 3GPP core network. If the indication for supplementary location information is included in the subscription, then UE location information is obtained from the 3GPP core network.
Step 3.
Based on the configurations, e.g., subscription, periodical location information timer, location management server is triggered to report the latest user location information to VAL server. The location management server determines the location information of UE as received in steps 1 and 2, including the supplementary location information (if indicated).
Step 4.
The location management server sends the location information report including the latest location information of one or more VAL users or VAL UEs to the VAL server or to the location management client that has previously configured.
Step 5.
VAL server may further share this location information to a group or to another VAL user or VAL UE.
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9.3.9  On-demand usage of location information procedureWord‑p. 54

The VAL server can request UE location information at any time by sending a location information request to the location management server, which may trigger location management server to immediately send the location report.
Figure 9.3.9-1 illustrates the high level procedure of on demand usage of location information. The same procedure can be applied for location management client and other entities that would like to subscribe to location information of VAL user or VAL UE.
Reproduction of 3GPP TS 23.434, Fig. 9.3.9-1: On-demand usage of location information procedure
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Step 1.
VAL server sends a location information request to the location management server.
Step 2.
The location management server acquires the latest location of the UEs being requested, by triggering an on-demand location report procedure as described in subclause 9.3.4, or from PLMN operator.
Step 3.
Then, location management server immediately sends the location information report including the latest location information acquired of one or more VAL users or VAL UEs.
Step 4.
VAL server may further share this location information to a group or to another VAL user or VAL UE.
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9.3.10  Obtaining UE(s) information at a location |R17|Word‑p. 55

Figure 9.3.10-1 describes the procedure for obtaining UE(s) information at a location.
Pre-condition:
  • The VAL server has a jurisdiction over a geographical area for which the location management server is configured to operate.
  • The UE(s) in the geographical area have provided its location information to the location management server.
Reproduction of 3GPP TS 23.434, Fig. 9.3.10-1: Obtaining UE(s) information at a location
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Step 1.
The VAL server sends get UE information request to the location management server. The request contains a location information and application defined proximity range.
Step 2.
The location management server determines the UE(s) whose location are within the application defined proximity range of the location information provided in step 1.
Step 3.
The location management server sends get UE information response to the VAL server with a list of UE(s) and its corresponding location information as determined in step 1.
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9.3.11  Monitoring Location Deviation |R17|Word‑p. 56

9.3.11.1  GeneralWord‑p. 56

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.
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9.3.11.2  Monitoring Location Deviation procedureWord‑p. 56

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 LMS server authorized to consume the 3GPP core network service (Monitoring events 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
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Step 1.
The VAL server sends Monitor Location Subscription Request to LMS 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 LMS 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 LMS 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 LMS server ignores the "Notify_Interval" and sends the location notification to the VAL server immediately.
Step 2.
LMS 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 LMS receives the VAL UE location information periodically from the 3GPP core network.
Step 3.
LMS 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 LMS server may determine to additionally include the positioning methods in SEAL LMS procedures to obtain location information.
Step 4.
LMS server, after successful subscription according to steps 2 and 3, sends Monitor Location Subscription response, indicating that the LMS 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 5a and 5b.
LMS server processes the location information received from SEAL Location Information procedures and the core network, and validates the information. If the location information is matching, then the LMS shall check if the VAL UE's current location is within the area of interest received in step 1. The UAE server will continue with step 6, step 7 and step 8 as applicable.
Step 6.
If the location information received from Location management client and the core network do not match, then the LMS 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 LMS and the core network in the notification message.
Step 7.
If the VAL UE's current location is from Location management client and the core network matches, and not in the area of interest received from VAL server in Monitor Location Subscription Request message, then the LMS 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 8.
When the VAL UE's current location is in area of interest, then the LMS 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.
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9.3.12  Location area monitoring information procedure |R17|Word‑p. 57

9.3.12.1  Location area monitoring subscribe procedureWord‑p. 57

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
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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 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.
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9.3.12.2  Location area monitoring subscribe modify procedureWord‑p. 58

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
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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.
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9.3.12.3  Location area monitoring unsubscribe procedureWord‑p. 58

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
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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.
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9.3.12.4  Location area monitoring notification procedureWord‑p. 59

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
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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.
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