G.3 MCVideo emergency group state
24.2813GPPMission Critical Video (MCVideo) signalling controlProtocol specificationRelease 18TS
The MCVideo emergency group state is the MCVideo client’s perspective of the in-progress emergency group state which is managed by the controlling MCVideo function. The MCVideo emergency group (MVEG) state is managed by the MCVideo client to enable the requesting of MCVideo emergency-level priority as early as possible in the origination of an MCVideo emergency group call. High-level characteristics of this state are captured in table G.3-1.
Table G.3-1: MCVideo emergency group state
|
MCVideo emergency group state values |
State-entering events |
Comments |
|
MVEG 1: no-emergency |
initial state prior to any call activity Emergency group call cancel request received on behalf of another user from the MCVideo server Emergency group call cancel response (success) in response to initiator’s request |
|
|
MVEG 2: in-progress |
Emergency group call response received (confirm) to initiator’s emergency group call request Emergency group call request received (on behalf of another user) |
In this state, all participants in calls on this group will receive emergency level priority whether or not they are in the MCVideo emergency state themselves. |
|
MVEG 3: cancel-pending |
Emergency group call cancel request sent by initiator |
The controlling MCVideo server may not grant the cancel request for various reasons, e.g., other users in an MCVideo emergency state remain in the call. |
|
MVEG 4: confirm-pending |
Emergency group call request sent by initiator |
The controlling MCVideo server may not grant the call request for various reasons, e.g., the MCVideo group is not configured as being emergency-capable so it can’t be assumed that the group will enter the in-progress state. |