On-board unit antenna switching for service reliability
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Solution Overview
Problem
Existing on-board units face challenges in smoothly switching between services with different communication speed and reliability requirements, particularly when using the WAVE communication standard, which does not account for varying communication speed ranges for different services, leading to potential incomplete service provision.
Innovation Solution
An on-board unit with two antennas and a switch that allows for three operation modes, enabling seamless switching between communication speeds for different services by connecting antennas to specific service communicating sections, ensuring reliable communication for both traffic data and billing services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the on-board unit switches between different communication speed ranges for different services, then the communication reliability for each service is improved, but the switching procedure becomes complex and may lead to incomplete service provision
Solution Approach 1:
The patent implements dynamic switching between different operation modes (first operation mode for first service, second operation mode for second service) based on service requirements. The control section dynamically adjusts the switch configuration and communication speed range according to the active service, enabling the system to adapt its communication parameters in real-time. This dynamic approach resolves the contradiction by making the switching procedure manageable through structured mode transitions while maintaining appropriate communication reliability for each service type.
Solution Approach 2:
The patent changes communication parameters (communication speed range, operation mode) based on service requirements. When switching from first service to second service, the control section changes the communication speed range from the first communication speed range to the second communication speed range, and adjusts the switch configuration accordingly. This parameter change approach allows the system to optimize communication reliability for each service while managing switching complexity through defined parameter sets.
2Ease of operation
If the on-board unit uses a single communication speed range for all services, then the switching procedure is simplified, but the communication reliability cannot be optimized for services with different requirements
Solution Approach 1:
The patent segments the communication system into distinct operation modes and speed ranges tailored to specific service requirements. The control section divides communication parameters into at least a first communication speed range for the first service and a second communication speed range for the second service. This segmentation allows simplified switching between predefined modes while maintaining optimized communication reliability for each service type, resolving the contradiction between ease of operation and communication reliability.
3Reliability
If the switch connects both antennas to one service communicating section, then diversity communication improves reliability for that service, but the other service cannot be communicated simultaneously
Solution Approach 1:
The patent implements dynamic antenna allocation through the switch, which can connect both antennas to either the first service communicating section or the second service communicating section based on the active operation mode. When the first service is active, both antennas connect to the first service communicating section for diversity communication. When the second service is active, both antennas connect to the second service communicating section. This dynamic reconfiguration maintains diversity communication reliability for the active service while enabling versatile service communication capability through mode switching.
Data Source
AI summary
An on-board unit includes a first antenna and a second antenna, a traffic data service communicating section corresponding to a traffic data service; a billing service communicating section corresponding to a billing service, a switch which switches a connection relation between each of the first antenna and the second antenna and the traffic data service communicating section and the billing service communicating section, a control section which controls the switch. When the operation mode is switched from the traffic data service mode to the billing service mode, the on-board unit is set to a switching communication mode in which one of the first antenna and the second antenna is connected with the traffic data service communicating section and the other is connected with the billing service communicating section.