Vehicle Telematics Short-Range Wireless Communication
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Solution Overview
Problem
Existing vehicle telematics systems face connectivity issues when disconnected from wireless carrier systems, preventing handheld devices from commanding vehicle functions due to lack of short-range wireless communication capabilities.
Innovation Solution
Establishing short-range wireless communication (SRWC) between handheld devices and vehicle telematics units using protocols like Bluetooth and Wi-Fi Direct, allowing for automatic connection and command execution of vehicle functions post-disconnection from wireless carrier systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the telematics unit relies solely on wireless carrier system connectivity, then long-range communication is enabled, but communication fails when disconnected from the carrier system
Solution Approach 1:
The patent introduces short-range wireless communication (SRWC) as an intermediary communication channel between the handheld device and telematics unit. When the primary wireless carrier system connection is unavailable, the SRWC channel acts as a mediator to maintain communication capability, thereby improving reliability while adapting to different connectivity conditions.
Solution Approach 2:
The system dynamically switches between wireless carrier system communication and short-range wireless communication based on connection status. The telematics unit and handheld device automatically transition communication protocols when disconnection is detected, enabling the system to adapt to changing environmental conditions and maintain operational versatility.
2Reliability
If short-range wireless communication is established automatically upon disconnection, then communication continuity is improved, but additional communication protocols and switching logic are required
Solution Approach 1:
The telematics unit and handheld device establish short-range wireless communication capabilities in advance, before disconnection occurs. The devices maintain readiness for SRWC mode, so when disconnection is detected, the transition to alternative communication channel occurs seamlessly without requiring complex real-time decision logic or additional infrastructure.
3Ease of operation
If the system waits for user interaction to establish alternative communication, then system simplicity is maintained, but response time increases and automation is reduced
Solution Approach 1:
The telematics unit and handheld device automatically detect disconnection events and initiate short-range wireless communication without requiring user intervention. The system monitors its own connection status and self-manages the transition between communication modes, eliminating the need for user awareness or action while maintaining operational simplicity.
Data Source
AI summary
A method and system for establishing short range wireless communication (SRWC) between a handheld communications device (HCD) and a vehicle telematics unit. In some instances, the communication may be established following a disconnection event between the telematics unit and a wireless carrier network. The SRWC may include Bluetooth and Wi-Fi Direct as well as other suitable protocols or technologies. Once SRWC is established, the telematics unit may receive a vehicle command from the HCD and perform the command.