Telematics Control Unit SMS Network Address Update
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Solution Overview
Problem
Existing vehicle telematics systems rely on backend servers for remote service requests, incurring operational and maintenance costs, and fail to efficiently update mobile device network addresses, leading to potential access issues when addresses change.
Innovation Solution
A vehicle telematics control unit (TCU) is programmed to receive and process SMS messages from mobile devices to update their network addresses, which are then sent to a packet data network (PDN) server, allowing for secure and efficient routing of data traffic without relying on backend servers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backend telematics server is used to handle remote service requests, then service functionality is provided, but operational and maintenance costs increase
Solution Approach 1:
The patent extracts the network address update functionality from the backend telematics server and implements it directly in the telematics control unit (TCU). The TCU now autonomously receives SMS messages containing network addresses and updates its routing table without requiring server intervention, eliminating the need for continuous server operation while maintaining service functionality
Solution Approach 2:
The TCU performs self-service by automatically processing SMS messages from mobile devices, extracting network addresses, and updating its routing table independently. This autonomous operation eliminates dependency on the backend server for address updates, reducing operational costs while preserving remote service capabilities
2Device complexity
If network addresses are not updated efficiently, then system simplicity is maintained, but access issues occur when addresses change
Solution Approach 1:
The system performs preliminary action by proactively updating the routing table in the TCU before access issues occur. When the server detects a network address change, it sends an update message to the TCU in advance, ensuring the routing table is current before the next communication attempt, thus preventing access failures
Solution Approach 2:
The system implements feedback through a two-way communication mechanism where the server monitors network address changes and actively notifies the TCU of updates. This feedback loop ensures the TCU maintains current routing information without continuously polling the server, balancing simplicity with reliability
Data Source
AI summary
A telematics control unit (TCU) receives a short message service (SMS) message from a phone number of a mobile device and identifies an updated network address of the mobile device from the message. The TCU sends the updated network address of the mobile device to a packet data network (PDN) server configured to route data traffic between the network address of the mobile device and the vehicle. The PDN server communicates over a data network with a telematics control unit (TCU) of a vehicle and maintains a list of identification numbers of mobile devices and corresponding network addresses of the mobile devices for the TCU. The PDN server receives an updated network address associated with an identification number of a mobile device from the TCU; and updates the list with the updated network address of the mobile device.