Content for TS 23.283 Word version: 18.1.0

1… 10… 10.2… 10.2.2… 10.2.3… 10.3… 10.3.3… 10.3.3.7… 10.3.4… 10.3.4.4… 10.3.5… 10.3.5.8… 10.3.6… 10.3.7… 10.3.7.5… 10.3.8… 10.4… 10.4.4… 10.5… 10.5.7… 10.6… 10.6.2… 10.6.2.3… 10.6.3… 10.6.4… 10.7… 10.8… 10.11… 10.11.4… 10.12… 10.14… 10.15…

10.3 Group call 10.3.1 General 10.3.2 Information flows for group call over interworking group 10.3.2.1 General 10.3.2.2 IWF group call request 10.3.2.3 IWF group call response (IWF - MCPTT server) 10.3.2.4 IWF Group-broadcast group call setup request 10.3.2.5 IWF Group-broadcast group call setup response 10.3.2.6 IWF Group-broadcast group call release request 10.3.2.7 IWF group-broadcast group call release response 10.3.2.8 IWF group join request 10.3.2.9 IWF group join response 10.3.2.10 IWF group call leave request 10.3.2.11 IWF group call leave response 10.3.2.12 IWF group call release request 10.3.2.13 IWF group call release response 10.3.2.14 IWF pre-configured regroup request 10.3.2.15 IWF pre-configured regroup response 10.3.2.16 IWF pre-configured regroup cancel request 10.3.2.17 IWF pre-configured regroup cancel response 10.3.2.18 IWF pre-configured regroup reject (IWF - MCPTT server, MCPTT server - IWF)
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10.3 Group call p. 35

10.3.1 General p. 35

The following subclauses define information flows and signaling procedures for group calls and broadcast group calls.

Where the group is defined in the MCPTT system and where the IWF has affiliated to an MCPTT group with a single affiliation on behalf of all LMR group members, only a single IWF group call request / IWF group call release request message is sent to the IWF at the commencement / release of a group call. Where the group is defined in the MCPTT system and where the IWF has passed through individual affiliations for each group member in the LMR system, the MCPTT system shall send individual IWF group call request / IWF group call release request messages to the IWF for all affiliated group members in the LMR system in accordance with primary and partner MCPTT system behaviour. In both cases, the distribution of the messages to group members in the LMR system is out of scope of the present document.

Where the group is defined in the LMR system, the IWF shall send individual IWF group call request / IWF group call release request messages to the IWF for all affiliated MCPTT group members in accordance with primary and partner MCPTT system behaviour.

10.3.2 Information flows for group call over interworking group p. 35

10.3.2.1 General p. 35

The following subclauses define information flows for group calls on the IWF-1 interface. Group call related information flows on reference points other than IWF-1 are defined in TS 23.379.

10.3.2.2 IWF group call request p. 35

Table 10.3.2.2-1 describes the information flow IWF group call request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.2-1: IWF group call request information elements

Information Element	Status	Description
MCPTT ID (see NOTE 1)	M	The MCPTT ID of the calling party
Functional alias	O	The functional alias of the calling party
MCPTT group ID	M	The MCPTT group ID of the interworking group on which the call is initiated
SDP offer	M	Media parameters of MCPTT server
Implicit floor request (see NOTE 2)	O	Indicates that the originator requests the floor
Broadcast indicator	O	Indicates that the group call request is for a broadcast group call
Location	O	Location of the calling party
NOTE 1: If the LMR system does not provide the calling party identity when the group call is originated from the LMR system, then this information element may be set to a MCPTT ID reserved for LMR user at the IWF. NOTE 2: This element shall be included only when the originating client requests the floor.

10.3.2.3 IWF group call response (IWF - MCPTT server) p. 35

Table 10.3.2.3-1 describes the information flow IWF group call response from the MCPTT server to the IWF and from the IWF to MCPTT server.

Table 10.3.2.3-1: IWF group call response information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the target MCPTT group member
MCPTT group ID	M	The MCPTT group ID of the group on which the call is requested
SDP answer	M	Media parameters selected

10.3.2.4 IWF Group-broadcast group call setup request p. 36

Table 10.3.2.4-1 describes the information flow IWF group-broadcast group call setup request from the MCPTT server to the IWF and from the IWF to the MCPTT server.

Table 10.3.2.4-1: IWF Group-broadcast group call setup request information elements

Information Element	Status	Description
MCPTT ID (see NOTE 1)	M	The MCPTT ID of the calling party
Functional alias	O	The functional alias of the calling party
MCPTT group ID	M	The MCPTT group ID of the group on which the call is requested
SDP offer	M	Media parameters of MCPTT clients
Implicit floor request (see NOTE 2)	O	Indicates that the originating client requests the floor
Location	O	Location of the calling party
NOTE 1: If the LMR system does not provide the calling party identity when the group-broadcast group call setup request is originated from the LMR system, then this information element may be set to a MCPTT ID reserved for the LMR user at the IWF. NOTE 2: This element shall be included only when the originating client requests the floor.

10.3.2.5 IWF Group-broadcast group call setup response p. 36

Table 10.3.2.5-1 describes the information flow IWF group-broadcast group call setup response from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.5-1: IWF Group-broadcast group call setup response information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the calling party
MCPTT group ID	M	The MCPTT group ID of the group on which the call is requested
SDP answer	M	Media parameters selected

10.3.2.6 IWF Group-broadcast group call release request p. 36

Table 10.3.2.6-1 describes the information flow IWF group-broadcast group call release request from the MCPTT server to the IWF and from the IWF to the MCPTT server.

Table 10.3.2.6-1: IWF Group-broadcast group call release request information elements

Information Element	Status	Description
MCPTT ID	M (see NOTE)	The MCPTT ID of the MCPTT group member
MCPTT group ID	M	The MCPTT group ID of the group on which the call is released
NOTE: If the LMR system does not provide the calling party identity when the group-broadcast group call release request is originated from the LMR system, then this information element may be set to a MCPTT ID reserved for the LMR user at the IWF.

10.3.2.7 IWF group-broadcast group call release response p. 37

Table 10.3.2.7-1 describes the information flow IWF group-broadcast group call release request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.7-1: IWF Group-broadcast group call release response information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the target MCPTT group member
MCPTT group ID	M	The MCPTT group ID of the group on which the call is released

10.3.2.8 IWF group join request p. 37

Table 10.3.2.8-1 describes the information flow IWF group join request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.8-1: IWF group join request information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the originator of the request. (see NOTE 1)
Functional alias	O	The functional alias of the calling party
MCPTT group ID	M	The MCPTT group ID of the group to which the group communication is requested
SDP offer	M	Media parameters of originator
Implicit floor request (see NOTE 2)	O	Indicates that the originating client requests the floor
NOTE 1: The IWF is configured with an MCPTT ID for use when the IWF is affiliating itself to the group on behalf of the LMR system. NOTE 2: This element is included only when the originating client requests the floor.

10.3.2.9 IWF group join response p. 37

Table 10.3.2.9-1 describes the information flow group join response from the MCPTT server to the IWF and from the IWF to the MCPTT server.

Table 10.3.2.9-1: IWF group join response information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the originator of the request. (see NOTE)
MCPTT group ID	M	The MCPTT group ID of the group to which the group communication is requested
SDP answer	M	Media parameters selected
NOTE: The IWF is configured with an MCPTT ID for use when the IWF is affiliating itself to the group on behalf of the LMR system.

10.3.2.10 IWF group call leave request p. 38

Table 10.3.2.10-1 describes the information flow IWF group call leave request from the MCPTT server to the IWF and from the IWF to the MCPTT server.

Table 10.3.2.10-1: IWF group call leave request information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the MCPTT group member
MCPTT group ID	M	The MCPTT group ID of the group from which the user is leaving

10.3.2.11 IWF group call leave response p. 38

Table 10.3.2.11-1 describes the information flow IWF group call leave response from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.11-1: IWF group call leave response information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the MCPTT group member
MCPTT group ID	M	The MCPTT group ID of the group from which the user is leaving

10.3.2.12 IWF group call release request p. 38

Table 10.3.2.12-1 describes the information flow IWF group call release request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.12-1: IWF group call release request information elements

Information Element	Status	Description
MCPTT ID (see NOTE)	O	The MCPTT ID of the initiating MCPTT group member
MCPTT group ID	M	The MCPTT group ID of the group on which the call is released
Release reason	O	The reason why the call is released
NOTE: This IE is not included if the group call release is initiated by the server (e.g. due to timeout)

10.3.2.13 IWF group call release response p. 39

Table 10.3.2.13-1 describes the information flow IWF group call release response from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.13-1: IWF group call release response information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the target MCPTT group member
MCPTT group ID	M	The MCPTT group ID of the group on which the call is released

10.3.2.14 IWF pre-configured regroup request |R16| p. 39

Table 10.3.2.14-1 describes the information flow IWF pre-configured regroup request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.14-1: IWF pre-configured regroup request information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the requester
MCPTT group ID	M	MCPTT group ID of the regroup group
MCPTT group ID	M	MCPTT group ID of the MCPTT group from which configuration is to be taken
MCPTT group ID list	O (see NOTE)	List of MCPTT groups to be regrouped into the pre-configured regroup group
MCPTT ID list	O (see NOTE)	List of MCPTT IDs to be regrouped into the pre-configured user regroup group
NOTE: One and only one of these shall be present.

10.3.2.15 IWF pre-configured regroup response |R16| p. 39

Table 10.3.2.15-1 describes the information flow IWF pre-configured regroup response from IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.15-1: IWF pre-configured regroup response information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the requester of the regrouping operation
MCPTT group ID	M	MCPTT group ID of the regroup group
Result	M	Result of the regrouping operation

10.3.2.16 IWF pre-configured regroup cancel request |R16| p. 39

Table 10.3.2.16-1 describes the information flow pre-configured regroup cancel request from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.16-1: IWF pre-configured regroup cancel request information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the requester
MCPTT group ID	M	MCPTT group ID of the regroup group

10.3.2.17 IWF pre-configured regroup cancel response |R16| p. 40

Table 10.3.2.17-1 describes the information flow IWF pre-configured regroup cancel response from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.17-1: IWF pre-configured regroup cancel response information elements

Information Element	Status	Description
MCPTT ID	M	The MCPTT ID of the requester of the regroup removal
MCPTT group ID	M	MCPTT group ID of the regroup group
Result	M	Result of the regroup removal operation

10.3.2.18 IWF pre-configured regroup reject (IWF - MCPTT server, MCPTT server - IWF) |R16| p. 40

Table 10.3.2.18-1 describes the information flow IWF pre-configured regroup reject from the IWF to the MCPTT server and from the MCPTT server to the IWF.

Table 10.3.2.18-1: IWF pre-configured regroup reject information elements

Information Element	Status	Description
MCPTT group ID	M	MCPTT group ID of the regroup group
Reject reason	M	Reason for rejecting the regrouping operation