Content for TS 23.281 Word version: 19.4.0
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7.19 Ad hoc group call |R18| p. 175
7.19.1 General p. 175
This subclause contains procedures for ad hoc group call across one or more MCVideo systems, 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 MCVideo server. The MCVideo 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 MCVideo group.
The preconfigured MCVideo group that provides the configuration is not used for the MCVideo group communication, it only provides configuration for one or more adhoc group calls. The MCVideo group ID of the ad hoc group call is provided by the MCVideo 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.
7.19.2 Information flows p. 175
7.19.2.1 Ad hoc group call request (MCVideo client - MCVideo server) p. 175
Table 7.19.2.1-1 describes the information flow ad hoc group call request from the MCVideo client to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the calling party |
| Functional alias | O | The functional alias of the calling party |
| MCVideo ad hoc group ID (see NOTE 1) | O | The MCVideo group ID to be associated with the ad hoc group communication. |
| Encryption supported (see NOTE 2) | O | Indicates whether this ad hoc group call supports end-to-end encryption. |
| MCVideo ID list (see NOTE 3, NOTE 6) | O | MCVideo IDs of the participants being invited for the ad hoc group call |
| SDP offer | M | Media parameters of MCVideo clients |
| Implicit transmit media request (see NOTE 4) | O | When originating client requests the transmission of media, this element shall be included |
| Broadcast indicator (see NOTE 5) | O | Indicates that the group call request is for a broadcast group call |
| Imminent peril indicator (see NOTE 5) | O | Indicates that the ad hoc group call request is an MCVideo imminent peril call |
| Emergency Indicator (see NOTE 5) | O | Indicates that the ad hoc group call request is an MCVideo emergency call |
| MCVideo ID list (see NOTE 3) | O | List of participants required to acknowledge the ad hoc group call before start of the audio transmission |
| Location information | O | Location of the calling party. |
| Criteria for determining the participants (see NOTE 6, NOTE 7) | O | Carries the details of criteria or meaningful label identifying the criteria or the combination of both which will be used by the MCVideo server for determining the participants e.g., it can be a location based criteria to invite particpants in a particular area |
| Requested priority | O | Application priority level requested for this group call |
|
NOTE 1:
If this information element is not included, the MCVideo server assigns an MCVideo 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. If the request follows an ad hoc group for emergency alert, then this element must be present.
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 transmission of media.
NOTE 5:
If used, only one of these information elements is present.
NOTE 6:
Only one of these information elements is present.
NOTE 7:
If the request follows an ad hoc group for emergency alert, then this element is not present.
|
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7.19.2.2 Ad hoc group call request return (MCVideo server - MCVideo client) p. 177
Table 7.19.2.2-1 describes the information flow ad hoc group call request return from the MCVideo server to the MCVideo client. This response could be intermediate response to provide the server assigned MCVideo ad hoc group ID.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the calling party |
| MCVideo ad hoc group ID (NOTE) | O | The MCVideo group ID to be associated with the ad hoc group call which is either provided by the group call initiator or assigned by the MCVideo server. This information element shall be present if the authorization result is success. |
| Pre-configured group ID (NOTE) | O | The preconfigured MCVideo group ID whose group configuration is to be used for the ad hoc group call (e.g. information for end-to-end security). |
| Authorization result | M | Indicate if authorization is success or failure |
|
NOTE:
These IEs are included only when the Authorization Result IE indicates authorization is successful.
|
||
7.19.2.3 Ad hoc group call request (MCVideo server - MCVideo server) p. 177
Table 7.19.2.3-1 describes the information flow ad hoc group call request between the MCVideo servers.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the calling party |
| Functional alias | O | The functional alias of the calling party |
| MCVideo ad hoc group ID | M | The MCVideo group ID to be associated with the ad hoc group call |
| MCVideo ID list (see NOTE 1, NOTE 3) | O | MCVideo IDs of the participants being invited for the ad hoc group call |
| SDP offer | M | Media parameters of MCVideo server |
| Broadcast indicator (see NOTE 2) | O | Indicates that the ad hoc group call request is for a broadcast ad hoc group call |
| Imminent peril indicator (see NOTE 2) | O | Indicates that the ad hoc group call request is an MCVideo imminent peril call |
| Emergency Indicator (see NOTE 2) | O | Indicates that the ad hoc group call request is an MCVideo emergency call |
| Preconfigured ad hoc group identity | O | Group identity whose configuration is to be applied for this ad hoc group call. |
| Criteria for determining the participants (see NOTE 3) | O | Carries the details of criteria or meaningful label identifying the criteria or the combination of both which will be used by the MCVideo server for determining the participants e.g., it can be a location based criteria to invite particpants in a particular area |
| Requested priority | O | Application 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.
|
||
7.19.2.4 Ad hoc group call request (MCVideo server - MCVideo client) p. 178
Table 7.19.2.4-1 describes the information flow ad hoc group call request from the MCVideo server to the MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the calling party |
| MCVideo ID | M | The identity of the MCVideo user towards which the request is sent |
| Functional alias | O | The functional alias of the calling party |
| MCVideo ad hoc group ID | M | The MCVideo group ID to be associated with the ad hoc group call |
| SDP offer | M | Media parameters of MCVideo server |
| Broadcast indicator (NOTE) | O | Indicates that the ad hoc group call request is for a broadcast ad hoc group call |
| Imminent peril indicator (NOTE) | O | Indicates that the ad hoc group call request is an MCVideo imminent peril call |
| Emergency Indicator (NOTE) | O | Indicates that the ad hoc group call request is an MCVideo emergency call |
| Preconfigured ad hoc group identity | O | Group identity whose configuration is to be applied for this ad hoc group call. |
|
NOTE:
If used, only one of these information elements is present.
|
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7.19.2.5 Ad hoc group call response (MCVideo server - MCVideo client) p. 179
Table 7.19.2.5-1 describes the information flow ad hoc group call response from the MCVideo server to the MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the calling party |
| Functional alias | O | The functional alias of the calling party |
| MCVideo group ID | M | The MCVideo group ID to be associated with the ad hoc group call |
| SDP answer | O | Media parameters selected and present if the Result is success. |
| Result | M | Result of the group call request (success or failure) |
7.19.2.6 Ad hoc group call response (MCVideo server - MCVideo server) p. 179
Table 7.19.2.6-1 describes the information flow ad hoc group call response between the MCVideo servers.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the target MCVideo user |
| Functional alias | O | The functional alias of the target MCVideo user |
| MCVideo ad hoc group ID | M | The MCVideo group ID to be associated with the ad hoc group call |
| SDP answer | O | Media parameters selected and present if the Result is success. |
| Result | M | Result of the ad hoc group call request (success or failure) |
7.19.2.7 Ad hoc group call response (MCVideo client - MCVideo server) p. 180
Table 7.19.2.7-1 describes the information flow ad hoc group call response from the MCVideo client to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the target MCVideo user |
| Functional alias | O | The functional alias of the target MCVideo user |
| MCVideo ad hoc group ID | M | The MCVideo group ID to be associated with the ad hoc group call |
| SDP answer | O | Media parameters selected and present if the Result is success. |
| Result | M | Result of the ad hoc group call request (success or failure) |
7.19.2.8 Ad hoc group call release request (MCVideo server - MCVideo client) p. 180
Table 7.19.2.8-1 describes the information flow ad hoc group call release request from the MCVideo server to the MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the ad hoc group call participant |
| Functional alias | O | The functional alias of the ad hoc group call participant |
| MCVideo ad hoc group ID | M | The MCVideo group ID of the ad hoc group call on which call is released |
7.19.2.8a Ad hoc group call release request (MCVideo client - MCVideo server) |R19| p. 180
Table 7.19.2.8a-1 describes the information flow ad hoc group call release request from the MCVideo client to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the user authorized to release the ad hoc group call. |
| Functional alias | O | The functional alias of the authorized user requesting to release the ad hoc group call. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of the ad hoc group call on which call is released. |
7.19.2.9 Ad hoc group call release response (MCVideo client - MCVideo server) p. 181
Table 7.19.2.9-1 describes the information flow ad hoc group call release response from the MCVideo client to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the ad hoc group call participant |
| Functional alias | O | The functional alias of the ad hoc group call participant |
| MCVideo group ID | M | The MCVideo group ID of the ad hoc group call on which call is released |
7.19.2.9a Ad hoc group call release response (MCVideo server - MCVideo client) |R19| p. 181
Table 7.19.2.9a-1 describes the information flow ad hoc group call release response from the MCVideo server to the MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the user authorized to release the ad hoc group call. |
| Functional alias | O | The functional alias of the authorized user requesting to release the ad hoc group call. |
| MCVideo group ID | M | The MCVideo group ID of the ad hoc group call on which call is released. |
7.19.2.10 Ad hoc group call notify (MCVideo server - MCVideo client) p. 181
Table 7.19.2.10-1 describes the information flow ad hoc group call notify from MCVideo server to MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the calling party or the MCVideo ID of the authorized users who are configured to receive this notification. |
| Functional alias | O | The functional alias of the calling party |
| MCVideo ad hoc group ID | M | The MCVideo group ID associated with the ad hoc group call |
| MCVideo ID list | O | The list of the invited MCVideo users who did not acknowledge the ad hoc group call request within a configured time or the list of the invited MCVideo users who acknowledged the ad hoc group call request and joined or the list of the MCVideo users who joined or left the ongoing MCVideo ad hoc group call. |
7.19.2.11 Modify ad hoc group call participants request (MCVideo client - MCVideo server) p. 182
Table 7.19.2.11-1 describes the information flow Modify ad hoc group call participants request from the MCVideo client to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the requesting MCVideo user who is authorized to modify the ad hoc group call participants. |
| Functional alias | O | The functional alias of the requesting MCVideo user who is authorized to modify the ad hoc group call participants. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call whose participants needs to be modified. |
| MCVideo ID list (see NOTE) | O | List of additional MCVideo users to be added to the on-going ad hoc group call. |
| MCVideo ID list (see NOTE) | O | List of MCVideo users to be removed from the on-going ad hoc group call. |
|
NOTE:
Either one or both of these information elements is present
|
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7.19.2.12 Modify ad hoc group call participants response (MCVideo server - MCVideo client) p. 182
Table 7.19.2.12-1 describes the information flow Modify ad hoc group call participants response from the MCVideo server to the MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the requesting MCVideo user who is authorized to modify the ad hoc group call participants. |
| Functional alias | O | The functional alias of the requesting MCVideo user who is authorized to modify the ad hoc group call participants. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call whose participants needs to be modified. |
| Result | M | Result of the modify ad hoc group call participants request (success or failure). |
| MCVideo ID list | O | List of MCVideo 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. |
7.19.2.13 Ad hoc group call leave request (MCVideo server - MCVideo client) p. 183
Table 7.19.2.13-1 describes the information flow ad hoc group call leave request from the MCVideo server to the MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the ad hoc group call participant leaving the call |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call on which call is on-going |
| Reason to leave | O | Carries the reason of why the MCVideo client is being asked to leave the ongoing ad hoc group call |
7.19.2.13a Ad hoc group call leave request (MCVideo client - MCVideo server) |R19| p. 183
Table 7.19.2.13a-1 describes the information flow ad hoc group call leave request from the MCVideo client to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the ad hoc group call participant leaving the call. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call on which call is on-going. |
| Reason to leave | M | Carries the reason of why the MCVideo client is leaving ongoing ad hoc group call (e.g. Due to migration). |
7.19.2.14 Ad hoc group call leave response (MCVideo client - MCVideo server) p. 184
Table 7.19.2.14-1 describes the information flow Ad hoc group call leave response from the MCVideo client to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the ad hoc group call participant leaving the call |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call on which call is on-going |
7.19.2.14a Ad hoc group call leave response (MCVideo server - MCVideo client) |R19| p. 184
Table 7.19.2.14a-1 describes the information flow Ad hoc group call leave response from the MCVideo server to the MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the ad hoc group call participant leaving the call. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call on which call is on-going. |
| Result | M | Result of the ad hoc group call leave request - success or failure. |
7.19.2.15 Ad hoc group call add user notification (MCVideo server - MCVideo server) p. 184
Table 7.19.2.15-1 describes the information flow Ad hoc group call add user notification from one MCVideo server to another MCVideo server. This notification is to provide the list of MCVideo IDs meeting the criteria specified in the ad hoc group communication get userlist request from one MCVideo server to another MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ad hoc group ID | M | The MCVideo group ID associated with the ad hoc group communication |
| MCVideo ID list | M | List of MCVideo IDs meeting the criteria specified in the ad hoc group communication get userlist |
7.19.2.16 Ad hoc group call remove user notification (MCVideo server - MCVideo server) p. 184
Table 7.19.2.16-1 describes the information flow Ad hoc group call remove user notification from one MCVideo server to another MCVideo server. This notification is to provide the list of MCVideo IDs no longer meeting the criteria specified in the ad hoc group communication get userlist request from one MCVideo server to another MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ad hoc group ID | M | The MCVideo group ID associated with the ad hoc group communication |
| MCVideo ID list | M | List of MCVideo IDs no longer meeting the criteria specified in the ad hoc group communication get userlist |
7.19.2.17 Ad hoc group call release notification (MCVideo server - MCVideo server) p. 185
Table 7.19.2.17-1 describes the information flow Ad hoc group call release notification from one MCVideo server to another MCVideo server. This notification is to indicate to stop evaluating the criteria to determine the participants list if another MCVideo server is having the criteria specified in the ad hoc group communication get userlist request.
| Information element | Status | Description |
|---|---|---|
| MCVideo ad hoc group ID | M | The MCVideo group ID associated with the ad hoc group communication |
7.19.2.18 Ad hoc group call get userlist (MCVideo server - MCVideo server) p. 185
Table 7.19.2.18-1 describes the information flow ad hoc group call get userlist between MCVideo servers.
| Information element | Status | Description |
|---|---|---|
| MCVideo ad hoc group ID | M | The associated MCVideo group ID of the ad hoc group call. |
| Criteria for determining the participants | M | Carries the details of criteria or meaningful label identifying the criteria or the combination of both which will be used by the MCVideo server for determining the participants e.g., it can be a location based criteria to invite participants in a particular area. |
7.19.2.19 Ad hoc group call get userlist response (MCVideo server - MCVideo server) p. 185
Table 7.19.2.19-1 describes the information flow ad hoc group call get userlist response between MCVideo servers.
| Information element | Status | Description |
|---|---|---|
| MCVideo ad hoc group ID | M | The associated MCVideo group ID of the ad hoc group call. |
| MCVideo ID list | M | List of MCVideo IDs meeting the criteria specified in the ad hoc group call get userlist. |
7.19.2.20 Modify ad hoc group call criteria request (MCVideo client - MCVideo server) |R19| p. 185
Table 7.19.2.20-1 describes the information flow Modify ad hoc group call criteria request from the MCVideo client to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the equesting MCVideo user who is authorized to modify the ad hoc group criteria. |
| Functional alias | O | The functional alias of the requesting MCVideo user who is authorized to modify the ad hoc group criteria. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call whose participants list needs to be modified. |
| Criteria to determine the list of participants | O | Carries the details of criteria or meaningful label identifying the criteria or the combination of both which will be used by the MCVideo server for determining the participants e.g., it can be a location-based criteria to invite participants in a particular area. |
7.19.2.20a Modify ad hoc group call criteria request (MCVideo server - MCVideo server) |R19| p. 186
Table 7.19.2.20a-1 describes the information flow Modify ad hoc group call criteria request from the MCVideo server to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the calling party. |
| Functional alias | O | The functional alias of the calling party. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call whose participants list needs to be modified. |
| Criteria to determine the list of participants | O | Carries the details of criteria or meaningful label identifying the criteria or the combination of both which will be used by the MCVideo server for determining the participants e.g., it can be a location-based criteria to invite participants in a particular area. |
7.19.2.21 Modify ad hoc group call criteria response (MCVideo server - MCVideo client) |R19| p. 186
Table 7.19.2.21-1 describes the information flow Modify ad hoc group call criteria response from the MCVideo server to the MCVideo client.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the requesting MCVideo user who is authorized to modify the ad hoc group criteria. |
| Functional alias | O | The functional alias of the requesting MCVideo user who is authorized to modify the ad hoc group criteria. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call whose participants list needs to be modified. |
| Result | M | Result of the modify ad hoc group call participants request (success or failure). |
7.19.2.21a Modify ad hoc group call criteria response (MCVideo server - MCVideo server) |R19| p. 187
Table 7.19.2.21a-1 describes the information flow Modify ad hoc group call criteria response from the MCVideo server to the MCVideo server.
| Information element | Status | Description |
|---|---|---|
| MCVideo ID | M | The MCVideo ID of the calling party. |
| Functional alias | O | The functional alias of the calling party. |
| MCVideo ad hoc group ID | M | The MCVideo group ID of ad hoc group call whose participants list needs to be modified. |
| Result | M | Result of the modify ad hoc group call participants request (success or failure). |
