Priority registration for in-vehicle emergency call service

摘要

An eCall is an emergency call that may (i) be initiated automatically by a wireless terminal due to a trigger event (e.g., a vehicle involved in an accident) or manually by a user and (ii) include additional data sent automatically by the terminal to a recipient entity, e.g., a Public Safety Answering Point (PSAP). Depending on the implementation, Emergency setup signaling (e.g., an Emergency SETUP message) or a location updating message is used to give high priority to registering an eCall-only mode In-Vehicle System (IVS) on a mobile network. The IVS can get higher priority from the mobile network right after an eCall emergency is triggered at the IVS. When requesting a connection to the mobile network, the WS can use one or more fields of the location updating message in order to register on the network with a higher priority.

主权项

1. A method of establishing an emergency call, comprising:
triggering an emergency in a vehicle comprising an in-vehicle system (IVS) for making an emergency call via a mobile network; generating a location updating message for the emergency call at the IVS, wherein the location updating message comprises an indicator indicating registration for the emergency call; transmitting the location updating message from the IVS to the mobile network; registering the IVS on the mobile network for the emergency call using the location updating message; generating an emergency setup message at the IVS; and transmitting the emergency setup message from the IVS to the mobile network for establishing the emergency call.