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Content for  TS 23.280  Word version:  19.0.1

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10.15.3.4  Other preconfigured regroup proceduresp. 295

10.15.3.4.1  Adding newly affiliated user to preconfigured group regroupp. 295
Figure 10.15.3.4.1-1 illustrates the procedure to add a newly affiliated user to an in-progress preconfigured MC service group regroup operation.
Pre-conditions:
  • The MC service client is a member of a MC service group that is part of an in-progress preconfigured group regroup operation.
  • The MC service group identity and group configuration for the preconfigured MC service group has been preconfigured in the MC service client, and the MC service client has received the relevant security related information to allow it to communicate in the MC service regroup group.
Reproduction of 3GPP TS 23.280, Fig. 10.15.3.4.1-1: Procedure to add a newly affiliated user to a preconfigured group regroup
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Step 1.
The MC service client affiliates to an MC service group that is currently part of an in-progress preconfigured group regroup. The affiliation follows the procedure in section 10.8.3.1 of this specification.
Step 2.
The MC service server retrieves the MC service group ID of the regroup group and the MC service group ID of the group from which configuration information for the regroup group is to be taken.
Step 3.
The MC service server sends the preconfigured regroup request to the MC service client.
Step 4.
The MC service client notifies the user of the regrouping.
Step 5.
The MC service client may send the preconfigured regroup response to the MC service server to acknowledge the regrouping action. These acknowledgements are not sent in response to a multicast transmission of the preconfigured regroup request.
Step 6.
The MC service server affiliates the regrouped MC service client to the regroup group.
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10.15.3.4.2  Updating the MC service ID list in a preconfigured regroup group based on user regroup |R18|p. 296
Figure 10.15.3.4.2-1 illustrates the procedure to add or remove an MC service user based on the MC service user criteria known at the MC service server.
Preconditions:
  • A preconfigured regroup group has been established.
  • The MC service server has selected MC service user 2 to participate in the preconfigured regroup group based on MC service user criteria known at the MC service server.
Reproduction of 3GPP TS 23.280, Fig. 10.15.3.4.2-1: Procedure to update the MC service ID list
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Step 1.
The MC service server detects that MC service client 2, which has been earlier included in the preconfigured regroup group, no longer meets the MC service user criteria known at the MC service server.
Step 2.
The MC service sends MC service client 2 a preconfigured user regroup remove request.
Step 3.
The MC service client 2 notifies the MC service user of the preconfigured user regroup removal.
Step 4.
The MC service client 2 may send the MC service server a preconfigured user regroup remove response to acknowledge the preconfigured user regroup removal.
Step 5.
The MC service server updates the preconfigured regroup group (including the MC service user ID list) and potential group communication.
Step 6.
The MC service server detects that the MC service client 3 meets the MC service user criteria.
Step 7.
The MC service server sends the MC service client 3 a preconfigured regroup request.
Step 8.
The MC service client 3 notifies the MC service user of the preconfigured regroup request.
Step 9.
The MC service client 3 may send the MC service server a preconfigured regroup response.
Step 10.
The MC service server updates the preconfigured regroup group (including the MC service user ID list), and potential group communication.
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