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Content for  TS 23.379  Word version:  17.5.0

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10.6  Group call

10.6.1  General

Group calls are enabled in both on-network and off-network.

10.6.2  On-network group call

10.6.2.1  General

This subclause contains procedures for group call across a single and multiple MCPTT servers, and associated functions such as emergency call, broadcast call and others.
Two variations of group call model are described in subclause 10.6.2.3, the pre-arranged group call and the chat group call. Each of the subsequent group call types in subclause 10.6.2.4 onwards are applicable to either call model.
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10.6.2.2  Information flows for group call in on-network

10.6.2.2.1  MCPTT emergency group call request
Table 10.6.2.2.1-1 describes the information flow MCPTT emergency group call request from the MCPTT client to the MCPTT server, from the MCPTT server to the MCPTT server, and from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe identity of the calling party
Functional aliasOThe functional alias of the calling party
MCPTT group IDMThe MCPTT group ID on which the call is to be conducted
Emergency indicatorMIndicates that the group call request is an MCPTT emergency call
Alert indicatorOIndicates whether an emergency alert is to be sent
Implicit floor request (NOTE)OIndicates that the originating client requests the floor
Requested priorityOPriority level requested for the call
LocationOLocation of the calling party
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10.6.2.2.1a  MCPTT emergency group call responseWord‑p. 35
Table 10.6.2.2.1a-1 describes the information flow MCPTT emergency group call response from the MCPTT client to the MCPTT server, from the MCPTT server to the MCPTT server, and from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe identity of the calling party
MCPTT group IDMThe MCPTT group ID on which the call is to be conducted
ResultMResult of the MCPTT emergency group call request (success or failure)
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10.6.2.2.2  MCPTT in-progress emergency group state cancel request
Table 10.6.2.2.2-1 describes the information flow MCPTT in-progress emergency group state cancel request from the MCPTT client to the MCPTT server and from the MCPTT server to the MCPTT server.
Information Element Status Description
MCPTT IDMThe identity of the cancelling party
MCPTT group IDMThe MCPTT group ID on which the MCPTT in-progress emergency state is to be cancelled
Alert indicatorOIndicates whether the emergency alert of the cancelling party is to be cancelled
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10.6.2.2.2a  MCPTT in-progress emergency group state cancel responseWord‑p. 36
Table 10.6.2.2.2a-1 describes the information flow MCPTT in-progress emergency group state cancel response from the MCPTT server to the MCPTT client and from the MCPTT server to the MCPTT server.
Information Element Status Description
MCPTT IDMThe identity of the cancelling party
MCPTT group IDMThe MCPTT group ID on which the MCPTT in-progress emergency in-progress is to be cancelled
ResultMResult of the MCPTT in-progress emergency group state cancel request (success or failure)
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10.6.2.2.3Void
10.6.2.2.3aVoid
10.6.2.2.3bVoid
10.6.2.2.4Void
10.6.2.2.4aVoid
10.6.2.2.5  MCPTT imminent peril group call request
Table 10.6.2.2.5-1 describes the information flow MCPTT imminent peril group call request from the MCPTT client to the MCPTT server, from the MCPTT server to the MCPTT server, and from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe identity of the calling party
Functional aliasOThe functional alias of the calling party
MCPTT group IDMThe MCPTT group ID on which the call is to be conducted
Imminent peril indicatorMIndicates that the group call request is an imminent peril call
Implicit floor request (NOTE)OIndicates that the originating client requests the floor
Requested priorityOPriority level requested for the call.
LocationOLocation of the calling party
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10.6.2.2.5a  MCPTT imminent peril group call responseWord‑p. 37
Table 10.6.2.2.5a-1 describes the information flow MCPTT imminent peril group call response from the MCPTT client to the MCPTT server, from the MCPTT server to the MCPTT server, and from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe identity of the calling party
MCPTT group IDMThe MCPTT group ID on which the call is to be conducted
ResultMResult of the MCPTT imminent peril group call request (success or failure)
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10.6.2.2.6  MCPTT in-progress imminent peril group state cancel request
Table 10.6.2.2.6-1 describes the information flow MCPTT in-progress imminent peril group state cancel request from the MCPTT client to the MCPTT server, from the MCPTT server to the MCPTT server, and from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe identity of the cancelling party
MCPTT group IDMThe MCPTT group ID on which the imminent peril group state is to be cancelled
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10.6.2.2.6a  MCPTT in-progress imminent peril group state cancel response
Table 10.6.2.2.6a-1 describes the information flow MCPTT in-progress imminent peril group state cancel response from the MCPTT client to the MCPTT server, from the MCPTT server to the MCPTT server, and from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe identity of the cancelling party
MCPTT group IDMThe MCPTT group ID on which the imminent peril group state is to be cancelled
ResultMResult of the MCPTT in-progress imminent peril group state cancel request (success or failure)
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10.6.2.2.7  Group call request (MCPTT client - MCPTT server)Word‑p. 38
Table 10.6.2.2.7-1 describes the information flow group call request from the MCPTT client to the MCPTT server.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the calling party
Functional aliasOThe functional alias of the calling party
MCPTT group ID (NOTE)OThe MCPTT group ID of the group on which the call is requested
SDP offerMMedia parameters of MCPTT clients
Implicit floor requestOWhen originating client requests the floor, this element shall be included
Broadcast indicatorOIndicates that the group call request is for a broadcast group call
MCPTT ID listOThe MCPTT ID of users being invited to the temporary group call - user regroup
Temporary group indicatorOIndicates that the group call request is for a temporary group call - user regroup
Location informationOLocation of the calling party.
Requested priorityOApplication priority level requested for this call
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10.6.2.2.8  Group call request (MCPTT server - MCPTT server)
Table 10.6.2.2.8-1 describes the information flow group call request between the MCPTT servers.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the calling party
Functional aliasOThe functional alias of the calling party
MCPTT group IDMThe MCPTT group ID of the group on which the call is initiated
SDP offerMMedia parameters of MCPTT server
Broadcast indicatorOIndicates that the group call request is for a broadcast group call
Implicit floor request (NOTE)OIndicates that the originating client requests the floor.
Requested priorityOPriority level requested for the call.
Location informationOLocation of the calling party
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10.6.2.2.9  Group call request (MCPTT server - MCPTT client)Word‑p. 39
Table 10.6.2.2.9-1 describes the information flow group call request from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the calling party
Functional aliasOThe functional alias of the calling party
MCPTT group IDMThe MCPTT group ID of the group on which the call is initiated
SDP offerMMedia parameters of MCPTT server
Broadcast indicatorOIndicates that the group call request is for a broadcast group call
Temporary group indicatorOIndicates that the group call request is for a temporary group call performed by user regroup
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10.6.2.2.10  Group call response (MCPTT server - MCPTT client)
Table 10.6.2.2.10-1 describes the information flow group call response from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the calling party
Functional aliasOThe functional alias of the calling party
MCPTT group IDMThe MCPTT group ID of the group on which the call is requested
SDP answerMMedia parameters selected
ResultMResult of the group call request (success or failure)
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10.6.2.2.11  Group call response (MCPTT server - MCPTT server)Word‑p. 40
Table 10.6.2.2.11-1 describes the information flow group call response between the MCPTT servers.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the target MCPTT group member
Functional aliasOThe functional alias of the target MCPTT group member
MCPTT group IDMThe MCPTT group ID of the group on which the call is requested
SDP answerMMedia parameters selected
ResultMResult of the group call request (success or failure)
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10.6.2.2.12  Group call response (MCPTT client - MCPTT server)
Table 10.6.2.2.12-1 describes the information flow group call response from the MCPTT client to the MCPTT server.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the target MCPTT group member
Functional aliasOThe functional alias of the target MCPTT group member
MCPTT group IDMThe MCPTT group ID of the group on which the call is initiated
SDP answerMMedia parameters selected
ResultMResult of the group call request (success or failure)
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10.6.2.2.13  Group call notify (MCPTT server - MCPTT client)
Table 10.6.2.2.13-1 describes the information flow group call notify from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the calling party
Functional aliasOThe functional alias of the calling party
MCPTT group IDMThe MCPTT group ID of the group on which the call is requested
MCPTT ID list (see NOTE)OThe list of the affiliated MCPTT group members who did not acknowledge the group call request
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10.6.2.2.14  Group call release request (MCPTT server - MCPTT client)Word‑p. 41
Table 10.6.2.2.14-1 describes the information flow group call release request from the MCPTT server to the MCPTT client.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the MCPTT group member
Functional aliasOThe functional alias of the MCPTT group member
MCPTT group IDMThe MCPTT group ID of the group on which the call is released
Temporary group indicatorOIndicates that the group call release request is for a temporary group call - user regroup
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10.6.2.2.14a  Group call release request (MCPTT client - MCPTT server)
Table 10.6.2.2.14a-1 describes the information flow group call release request from the MCPTT client to the MCPTT server.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the MCPTT group member
Functional aliasOThe functional alias of the MCPTT group member
MCPTT group IDMThe MCPTT group ID of the group on which the call is released
Temporary group indicatorOIndicates that the group call release request is for a temporary group call - user regroup
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10.6.2.2.15  Group call release request (MCPTT server - MCPTT server)
Table 10.6.2.2.15-1 describes the information flow group call release request between the MCPTT servers.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the MCPTT group member
Functional aliasOThe functional alias of the MCPTT group member
MCPTT group IDMThe MCPTT group ID of the group on which the call is released
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10.6.2.2.16  Group call release response (MCPTT client - MCPTT server)Word‑p. 42
Table 10.6.2.2.16-1 describes the information flow group call release response from the MCPTT client to the MCPTT server.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the MCPTT group member
Functional aliasOThe functional alias of the MCPTT group member
MCPTT group IDMThe MCPTT group ID of the group on which the call is released
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10.6.2.2.17  Group call release response (MCPTT server - MCPTT server)
Table 10.6.2.2.17-1 describes the information flow group call release response between the MCPTT servers.
Information Element Status Description
MCPTT IDMThe MCPTT ID of the MCPTT group member
Functional aliasOThe functional alias of the MCPTT group member
MCPTT group IDMThe MCPTT group ID of the group on which the call is released
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