Telematics Controller Circuit-Switched Response to Packet Failure
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Solution Overview
Problem
In scenarios where packet-switched data connections fail due to poor coverage or registration rejections, vehicles often retry connections, wasting resources and power, as existing systems do not effectively differentiate between circuit-switched and packet-switched communication availability.
Innovation Solution
A vehicle telematics controller identifies its location and sends a message to the service delivery network indicating that only circuit-switched communication is available, preventing unnecessary retry attempts and conserving resources by updating failure zones to reflect areas where packet-switched communication is unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle attempts to retry packet-switched data connection after failure, then connection reliability may be improved, but power consumption and resource usage increase
Solution Approach 1:
The vehicle determines communication availability (circuit-switched vs packet-switched) before attempting data connection, and sends indication messages in advance to prevent futile retry attempts. This preliminary assessment avoids wasting power on connections that are destined to fail due to coverage or registration issues.
Solution Approach 2:
The system implements feedback loops where the vehicle monitors connection outcomes and sends indication messages back to the service delivery network. The network uses this feedback to update failure zones and adjust wake request strategies, creating a closed-loop system that learns from past failures and avoids repeating them.
2Reliability
If the service delivery network sends wake requests to vehicles, then service delivery reliability improves, but unnecessary retry attempts waste network resources
Solution Approach 1:
The service delivery network receives indication messages from vehicles about packet-switched communication unavailability and uses this feedback to update failure zones. When attempting to deliver services, the network checks whether the vehicle is in a failure zone and skips wake requests for vehicles in areas where packet-switched communication is known to be unavailable, avoiding wasted network resources.
Solution Approach 2:
The network proactively maintains updated failure zone information and checks vehicle locations against these zones before sending wake requests. This preliminary check prevents unnecessary wake requests and retry attempts before they are initiated, conserving network resources.
3Productivity
If the vehicle sends indication messages about communication availability, then resource optimization improves, but device complexity increases
Solution Approach 1:
The indication message functionality is extracted as a separate, dedicated process within the telematics controller. Rather than embedding complex communication management logic throughout the system, the patent isolates the specific function of determining packet-switched availability and sending indication messages as a distinct module, reducing overall system complexity while maintaining resource optimization benefits.
Data Source
AI summary
A telematics controller is programmed identify a location of the vehicle responsive to failure of a vehicle-originated data call to initiate packet-switched communications, and send, to a service delivery network configured to provide data services to the vehicle, a message specifying that circuit-switched communication but not packet-switched communication is available to the vehicle. A message is received, over a wide-area network from a vehicle, in response to a failed initiation of a packed-switched data connection over the wide-area network, indicating that packet-switched communications are unavailable at a current location of the vehicle. Failure zones are updated to indicate that the current location of the vehicle is a network location supporting circuit-switched communication but not packet-switched communication over the wide-area network.