24.2813GPPMission Critical Video (MCVideo) signalling controlProtocol specificationRelease 16TS
The MCVideo emergency private priority state is the MCVideo client’s perspective of the in-progress emergency private call state which is managed by the controlling MCVideo function. The MCVideo emergency private priority (MVEPP) 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 private call. High-level characteristics of this state are captured in table G.10-1.
Table G.10-1: MCVideo emergency private priority state
MCVideo emergency private priority state values
MVEPP 1: no-emergency
initial state prior to any call activity
Emergency private call cancel request received on behalf of another user from the MCVideo server
Emergency private call cancel response (success) in response to initiator’s request
MVEPP 2: in-progress
Emergency private call response received (confirm) to initiator’s emergency private call request
Emergency private call request received (on behalf of another user)
In this state, both participants in calls to each other will request emergency level priority whether or not they are in the MCVideo emergency state themselves.
MVEPP 3: cancel-pending
Emergency private call cancel request sent by initiator
The controlling MCVideo server may not grant the cancel request for various reasons, e.g., the other user in the call is in an MCVideo emergency state.
MVEPP 4: confirm-pending
Emergency private call request sent by initiator
The controlling MCVideo server may not grant the call request for various reasons, e.g., the MCVideo user is not configured as being authorised to originate an emergency private call so it can’t be assumed that the call (originator and target users) will enter the in-progress state.