In-Vehicle System Emergency Registration Priority
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Solution Overview
Problem
Conventional wireless network registration processes for in-vehicle emergency call systems (eCall) often result in delays due to non-emergency priority treatment, which is critical to expedite emergency call setups in accident scenarios.
Innovation Solution
Implementing an emergency access procedure using an emergency setup message or location updating message with specific cause values to prioritize registration of in-vehicle systems (IVS) on mobile networks, ensuring faster connection to emergency services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional registration procedure is used for eCall-only mode IVS, then the IVS can register on the mobile network, but the registration delay increases due to non-emergency priority treatment
Solution Approach 1:
The patent changes the priority parameter of the registration request from normal to high priority. The IVS sets a high priority indicator in the registration message when registering after an emergency trigger, which causes the mobile network to process and complete the registration faster, thereby reducing registration delay while ensuring reliable emergency call setup.
2Reliability
If the IVS registers on the mobile network before emergency call, then the network can recognize the IVS, but the registration process takes longer due to conventional priority handling
Solution Approach 1:
The patent modifies the priority parameter in the registration request message to indicate high priority status. This parameter change enables the mobile network to recognize the IVS and simultaneously prioritize its processing, achieving both reliable network recognition and faster registration speed by treating the emergency registration differently from conventional registrations.
3Speed
If the IVS uses emergency access procedure with high priority indicator, then the registration speed increases, but the signaling complexity increases
Solution Approach 1:
The patent uses an existing registration message format and adds a high priority indicator field to it, making the message serve dual purposes: conventional registration and emergency priority indication. This multi-functionality approach increases registration speed while minimizing signaling complexity by reusing existing message structures rather than creating entirely new signaling procedures.
Data Source
AI summary
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.