G.7 MCVideo imminent peril group state

24.2813GPPMission Critical Video (MCVideo) signalling controlProtocol specificationRelease 18TS

The MCVideo imminent peril group state is the MCVideo client’s perspective of the in-progress imminent peril group state which is managed by the controlling MCVideo function. The MCVideo imminent peril group (MVIG) state is managed by the MCVideo client to enable the requesting of MCVideo imminent peril-level priority as early as possible in the origination of an MCVideo imminent peril group call. High-level characteristics of this state are captured in table G.7-1.

Table G.7-1: MCVideo imminent peril group state

MCVideo imminent peril group state values

State-entering events

Comments

MVIG 1: no-imminent peril

initial state prior to any call activity

Imminent peril group call cancel request received on behalf of another user from the MCVideo server

Imminent peril group call cancel response (success) in response to initiator’s request

MVIG 2: in-progress

Imminent peril group call response received (confirm) to initiator’s imminent peril group call request

Imminent peril group call request received (on behalf of another user)

In this state, all participants in calls on this group will receive imminent peril level priority whether or not they initiated an MCVideo imminent peril group call themselves.

MVIG 3: cancel-pending

Imminent peril 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 imminent peril state remain in the call.

MVIG 4: confirm-pending

Imminent peril 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 imminent peril-capable so it can’t be assumed that the group will enter the in-progress state.