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Content for  TS 23.280  Word version:  19.3.1

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10.9.3.5 Location information subscription procedure  10.9.3.6 Usage of location information procedure  10.9.3.6.1 Event-trigger location information notification procedure  10.9.3.6.2 On-demand usage of location information procedure  10.9.3.7 Location information cancel subscription procedure 
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10.9.3.5  Location information subscription procedure  p. 200

Figure 10.9.3.5-1 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 MC service user location information.
Reproduction of 3GPP TS 23.280, Fig. 10.9.3.5-1: Location information subscription request procedure
Figure 10.9.3.5-1: Location information subscription request procedure
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Step 1.
MC service server or location management client sends a location information subscription request to the location management server to subscribe location information of one or more MC service users.
Step 2.
The location management server checks if the location management client is authorized to initiate the location information subscription request.
Step 3.
The location management server replies with a location information subscription response indicating the subscription status.
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10.9.3.6  Usage of location information procedure  p. 200

10.9.3.6.1  Event-trigger location information notification procedure  p. 200
Figure 10.9.3.6.1-1 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 MC service user.
Pre-condition:
  1. The MC service server or location management client has subscribed to the location information of a target MC service user.
Reproduction of 3GPP TS 23.280, Fig. 10.9.3.6.1-1: Event-trigger usage of location information procedure
Figure 10.9.3.6.1-1: Event-trigger usage of location information procedure
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Step 1.
Based on configuration, e.g., subscription, periodical location information timer, the location management server is triggered to report the latest user location information of the target MC service user to the subscribed MC service server or subscribed location management client. The location management server has verified that the subscribed MC service server or subscribed location management client is authorized to receive the user location information of the target MC service user.
Step 2.
The location management server sends the location information notification including the latest location information of one MC service user to the MC service server or to the location management client. The latest location information is derived from the location report procedure as described in clause 10.9.3.1, or from PLMN operator (e.g. LCS network).If the optional MC service UE label is present, the location management server sends it, as part of the location information notification, to the MC service user.
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10.9.3.6.2  On-demand usage of location information procedure  p. 201
The MC service server or the location management client can request location information at any time by sending a location information request to the location management server, which may trigger location management server to send the location information report immediately.
Figure 10.9.3.6.2-1 illustrates the high level procedure of on-demand usage of location information. The same procedure can be applied for other entities that would like to subscribe to location information at the location management server of an MC service user.
Reproduction of 3GPP TS 23.280, Fig. 10.9.3.6.2-1: On-demand usage of location information procedure
Figure 10.9.3.6.2-1: On-demand usage of location information procedure
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Step 1.
MC service server or location management client send a location information request to the location management server.
Step 2.
The location management server checks if the location management client is authorized to request the location information.
Step 3.
The location management server acquires the latest location of the MC service clients being requested, by triggering an on-demand location report procedure as described in clause 10.9.3.2, or from PLMN operator (e.g. LCS network).
Step 4.
Then, location management server immediately sends the location information report including the latest location information acquired of one MC service user to the MC service server or to the location management client. If the optional MC service UE label is present, the location management server sends it, as part of the location information report, to the MC service user.
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10.9.3.7  Location information cancel subscription procedure |R16|  p. 201

Figure 10.9.3.7-1 illustrates the high level procedure of location information cancel subscription request. The MC service server or the location management client can request the cancellation of location information subscriptions at any time from the location management server.
Pre-conditions:
  • The authorized MC service user is in possession of the MC service ID of the MC service user as well as the location information subscriptions of this MC service ID.
Reproduction of 3GPP TS 23.280, Fig. 10.9.3.7-1: Location information cancel subscription request procedure
Figure 10.9.3.7-1: Location information cancel subscription request procedure
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Step 1.
MC service server or location management client sends a location information cancel subscription request to the location management server to cancel the subscription for location information of one or more MC service users.
Step 2.
The location management server checks the authorization of this request.
Step 3.
The location management server replies with a location information cancel subscription response indicating the cancel subscription status.
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