Tech-invite3GPPspaceIETF RFCsSIP
Quick21222324252627282931323334353637384‑5x

Content for  TS 23.379  Word version:  18.4.0

Top   Top   Up   Prev   Next

 

10.19  Ad hoc group call |R18|p. 235

10.19.1  Generalp. 235

This subclause contains procedures for ad hoc group call across a single MCPTT system, and associated functions such as emergency call, Imminent peril call, broadcast call and others.
The ad hoc group calls can use the participants list provided by either an initiator of the call or MCPTT server. The MCPTT server can use the criteria provided by the initiator of the call to determine the participants list along with its own criteria or local policies. The resulting ad hoc group uses the configuration of a separate preconfigured MCPTT group.
The preconfigured MCPTT group that provides the configuration is not used for the MCPTT group communication, it only provides configuration for one or more adhoc group calls. The MCPTT group ID of the ad hoc group call is provided by the MCPTT server when the ad hoc group call is originated. In order to establish security context for the end-to-end secured ad hoc group call, the security related information is used from this preconfigured group.
Up

10.19.2  Information flowsp. 235

10.19.2.1  Ad hoc group call request (MCPTT client - MCPTT server)p. 235

Table 10.19.2.1-1 describes the information flow ad hoc 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
MC service ad hoc group ID (see NOTE 1)OThe MC service group ID which is generated by the MC service user to be associated with the ad hoc group communication
Encryption supported (see NOTE 2)OIndicates whether this ad hoc group call supports end-to-end encryption
MCPTT ID list (see NOTE 3, NOTE 6)OMCPTT IDs of the participants being invited for the ad hoc group call
SDP offerMMedia parameters of MCPTT clients
Implicit floor request (see NOTE 4)OWhen originating client requests the floor, this element shall be included
Broadcast indicator (see NOTE 5)OIndicates that the group call request is for a broadcast group call
Imminent peril indicator (see NOTE 5)OIndicates that the ad hoc group call request is an MC service imminent peril call
Emergency Indicator (see NOTE 5)OIndicates that the ad hoc group call request is an MC service emergency call
MCPTT ID list (see NOTE 3)OList of participants required to acknowledge the ad hoc group call before start of the audio transmission
Location informationOLocation of the calling party.
Criteria for determining the participants (see NOTE 6)OCarries the details of criteria or meaningful label identifying the criteria or the combination of both which will be used by the MCPTT server for determining the participants e.g., it can be a location based criteria to invite particpants in a particular area
Requested priorityOApplication priority level requested for this group call
NOTE 1:
If this information element is not included, the MC service server assigns an MC service ad hoc group ID to be used for the ad hoc group communication. This information element is returned to the calling party to use in the ad hoc group communication.
NOTE 2:
This information element is present and set to true only if this ad hoc group call is encrypted. When the ad hoc group call is initiated with participants provided by the initiator this acts as an indicator that subsequent requests follow targeting the individual participants and carrying the relevant key material. If this information element is set to false or not present, then this ad hoc group call is unencrypted.
NOTE 3:
This element is included only when the originating client sends the list of participants.
NOTE 4:
This element is included only when the originating client requests the floor.
NOTE 5:
If used, only one of these information elements is present.
NOTE 6:
Only one of these information elements is present.
Up

10.19.2.2  Ad hoc group call request return (MCPTT server - MCPTT client)p. 237

Table 10.19.2.2-1 describes the information flow ad hoc group call request return from the MCPTT server to the MCPTT client. This response could be intermediate response to provide the server assigned MCPTT ad hoc group ID.
Information element Status Description
MCPTT IDMThe MCPTT ID of the calling party
MCPTT ad hoc group IDOThe MCPTT group ID to be associated with the ad hoc group call which is assigned by the MCPTT server.This information element shall be present if the authorization result is success.
Authorization resultMIndicate if authorization is success or failure
Up

10.19.2.3  Ad hoc group call request (MCPTT server - MCPTT server)p. 237

Table 10.19.2.3-1 describes the information flow ad hoc 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 ad hoc group IDMThe MCPTT group ID to be associated with the ad hoc group call
MCPTT ID list (see NOTE 1, NOTE 3)OMCPTT IDs of the participants being invited for the ad hoc group call
SDP offerMMedia parameters of MCPTT server
Broadcast indicator (see NOTE 2)OIndicates that the ad hoc group call request is for a broadcast ad hoc group call
Imminent peril indicator (see NOTE 2)OIndicates that the ad hoc group call request is an MC service imminent peril call
Emergency Indicator (see NOTE 2)OIndicates that the ad hoc group call request is an MC service emergency call
Preconfigured ad hoc group identityOGroup identity whose configuration is to be applied for this ad hoc group call.
Criteria for determining the participants (see NOTE 3)OCarries the details of criteria or meaningful label identifying the criteria or the combination of both which will be used by the MCPTT server for determining the participants e.g., it can be a location based criteria to invite particpants in a particular area
Requested priorityOApplication priority level requested for this group call
NOTE 1:
This element is included only when the originating client sends the list of participants.
NOTE 2:
If used, only one of these information elements is present.
NOTE 3:
Only one of these information elements is present.
Up

10.19.2.4  Ad hoc group call request (MCPTT server - MCPTT client)p. 238

Table 10.19.2.4-1 describes the information flow ad hoc 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 ad hoc group IDMThe MCPTT group ID to be associated with the ad hoc group call
SDP offerMMedia parameters of MCPTT server
Broadcast indicator (see NOTE 1)OIndicates that the ad hoc group call request is for a broadcast ad hoc group call
Imminent peril indicator (see NOTE 1)OIndicates that the ad hoc group call request is an MC service imminent peril call
Emergency Indicator (see NOTE 1)OIndicates that the ad hoc group call request is an MC service emergency call
Preconfigured ad hoc group identityOGroup identity whose configuration is to be applied for this ad hoc group call.
NOTE 1:
If used, only one of these information elements is present.
Up

10.19.2.5  Ad hoc group call response (MCPTT server - MCPTT client)p. 239

Table 10.19.2.5-1 describes the information flow ad hoc 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 to be associated with the ad hoc group call
SDP answerOMedia parameters selected and present if the Result is success.
ResultMResult of the group call request (success or failure)
Up

10.19.2.6  Ad hoc group call response (MCPTT server - MCPTT server)p. 239

Table 10.19.2.6-1 describes the information flow ad hoc group call response between the MCPTT servers.
Information element Status Description
MCPTT IDMThe MCPTT ID of the target MC service user
Functional aliasOThe functional alias of the target MC service user
MCPTT ad hoc group IDMThe MCPTT group ID to be associated with the ad hoc group call
SDP answerOMedia parameters selected and present if the Result is success.
ResultMResult of the ad hoc group call request (success or failure)
Up

10.19.2.7  Ad hoc group call response (MCPTT client - MCPTT server)p. 240

Table 10.19.2.7-1 describes the information flow ad hoc group call response from the MCPTT client to the MCPTT server.
Information element Status Description
MCPTT IDMThe MCPTT ID of the target MC service user
Functional aliasOThe functional alias of the target MC service user
MCPTT ad hoc group IDMThe MCPTT group ID to be associated with the ad hoc group call
SDP answerOMedia parameters selected and present if the Result is success.
ResultMResult of the ad hoc group call request (success or failure)
Up

10.19.2.8  Ad hoc group call release request (MCPTT server - MCPTT client)p. 240

Table 10.19.2.8-1 describes the information flow ad hoc group call release request from the MCPTT server to the MCPTT client.
Information element Status Description
MCPTT IDMThe MCPTT ID of the ad hoc group call participant
Functional aliasOThe functional alias of the ad hoc group call participant
MCPTT ad hoc group IDMThe MCPTT group ID of the ad hoc group call on which call is released
Up

10.19.2.9  Ad hoc group call release response (MCPTT client - MCPTT server)p. 240

Table 10.19.2.9-1 describes the information flow ad hoc group call release response from the MCPTT server to the MCPTT client.
Information element Status Description
MCPTT IDMThe MCPTT ID of the ad hoc group call participant
Functional aliasOThe functional alias of the ad hoc group call participant
MCPTT group IDMThe MCPTT group ID of the ad hoc group call on which call is released
Up

10.19.2.10  Ad hoc group call notify (MCPTT server - MCPTT client)p. 241

Table 10.19.2.10-1 describes the information flow ad hoc group call notify from MCPTT server to MCPTT client.
Information element Status Description
MCPTT IDMThe MCPTT ID of the calling party
Functional aliasOThe functional alias of the calling party
MCPTT ad hoc group IDMThe MCPTT group ID associated with the ad hoc group call
MCPTT ID list (see NOTE)OThe list of the invited MC service users who did not acknowledge the ad hoc group call request
NOTE:
Only applicable to acknowledged group calls.
Up

10.19.2.11  Modify ad hoc group call participants request (MCPTT client - MCPTT server)p. 241

Table 10.19.2.11-1 describes the information flow Modify ad hoc group call participants 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 ad hoc group IDMThe MCPTT group ID of ad hoc group call whose participants list needs to be modified
MCPTT ID list (see NOTE)OList of additional MCPTT users to be added to the on-going ad hoc group call
MCPTT ID list (see NOTE)OList of MCPTT users to be removed from the on-going ad hoc group call
NOTE:
Either one or both of these information elements is present
Up

10.19.2.12  Modify ad hoc group call participants response (MCPTT server - MCPTT client)p. 241

Table 10.19.2.12-1 describes the information flow Modify ad hoc group call participants 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 ad hoc group IDMThe MCPTT group ID of ad hoc group call whose participants list needs to be modified
ResultMResult of the modify ad hoc group call participants request (success of failure)
MCPTT ID listOList of MCPTT users who are not allowed to be added to the on-going ad hoc group call. This list is provided if the operation is partially success.
Up

10.19.2.13  Ad hoc group call leave request (MCPTT server - MCPTT client)p. 242

Table 10.19.2.13-1 describes the information flow ad hoc group call leave request from the MCPTT server to the MCPTT client.
Information element Status Description
MCPTT IDMThe MCPTT ID of the ad hoc group call participant leaving the call
MCPTT ad hoc group IDMThe MCPTT group ID of ad hoc group call on which call is on-going
Reason to leaveOCarries the reason of why the MCPTT client is being asked to leave the ongoing ad hoc group call
Up

10.19.2.14  Ad hoc group call leave response (MCPTT client - MCPTT server)p. 242

Table 10.19.2.14-1 describes the information flow Ad hoc group call leave response from the MCPTT client to the MCPTT server.
Information element Status Description
MCPTT IDMThe MCPTT ID of the ad hoc group call participant leaving the call
MCPTT ad hoc group IDMThe MCPTT group ID of ad hoc group call on which call is on-going
Up

Up   Top   ToC