Vehicle Telematics SIP Proxy for Secure Voice Data Transmission
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Solution Overview
Problem
Modern vehicle telematics communications face increased complexity and vulnerability due to multiple switches and infrastructure, leading to higher transmission costs and interception risks, especially when operating on roaming networks or transmitting both voice and data.
Innovation Solution
Establishing a session initiation protocol (SIP) connection between a vehicle telematics unit and a call center through a SIP proxy server or femtocell network, enabling secure, packetized data transmission and voice communication over a single channel, with the option to set up a virtual private network for encryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional circuit-switched telephone calls are used for vehicle telematics communication, then voice communication can be established, but transmission costs increase and communication infrastructure complexity increases
Solution Approach 1:
The patent replaces traditional circuit-switched telephone communication with IP-based packet-switched communication using SIP protocol. This substitution eliminates the need for complex circuit switching infrastructure and reduces transmission costs while maintaining voice communication capability through voice over IP technology.
Solution Approach 2:
The SIP proxy server acts as a universal communication gateway that handles both voice and data transmission through a single IP connection. This multi-functional approach consolidates multiple communication paths into one unified system, reducing infrastructure complexity while providing versatile communication services.
2Adaptability or versatility
If multiple switches and telephony infrastructure are used in communication path, then traditional telephone calls can be routed, but transmission costs increase and vulnerability to eavesdropping increases
Solution Approach 1:
The SIP proxy server serves as a secure intermediary that establishes direct IP connections between the vehicle telematics unit and the call center. This intermediary approach eliminates multiple public switches from the communication path, reducing eavesdropping vulnerability while maintaining call routing capability through SIP signaling.
Solution Approach 2:
The patent substitutes traditional circuit-switched routing with IP-based packet switching, enabling more secure and cost-effective communication. The SIP protocol provides encryption and secure authentication mechanisms that protect against eavesdropping while maintaining flexible call routing capabilities.
3Ease of operation
If circuit-switched telephone calls are used, then voice communication is established, but transmission costs increase
Solution Approach 1:
The patent replaces expensive circuit-switched telephone communication with cost-effective IP-based packet-switched communication. The SIP protocol enables voice over IP technology that significantly reduces transmission costs while maintaining voice communication quality and reliability.
Solution Approach 2:
The SIP proxy server provides a universal communication platform that handles both voice and data transmission through a single IP connection, eliminating the need for separate circuit-switched voice channels and reducing overall transmission costs.
Data Source
AI summary
A method of communicating between a vehicle and a telematics subscription service includes wirelessly linking a vehicle telematics unit to a session initiation protocol (SIP) proxy server; placing a telephone call from the vehicle telematics unit that is received by the SIP proxy server via the wireless link; establishing a SIP connection between the vehicle telematics unit and a telematics subscription service using the SIP proxy server in response to the placed telephone call; and communicating packetized data between the vehicle telematics unit and the telematics subscription service via the SIP connection.