V2P Message Compression Using BLE and UWB
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Solution Overview
Problem
Current vehicle-to-pedestrian (V2P) communication systems face challenges in minimizing power consumption, particularly in pedestrian terminals, which can increase device costs and hinder the dissemination of new terminal devices due to the lack of established communication standards.
Innovation Solution
A method and apparatus for transmitting and receiving V2P messages using compression techniques, leveraging existing communication standards like Bluetooth Low Energy (BLE) and ultra-wideband (UWB), which reduces message size and power consumption by employing a timer-based approach to generate and transmit lead messages and compressed messages, utilizing identifiers for efficient decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2X communication modem is separately provided in VRU terminal, then V2P communication capability is improved, but terminal price increases and dissemination speed decreases
Solution Approach 1:
The patent applies universality by enabling smartphones to perform V2P communication functions through software applications rather than requiring dedicated hardware modems. The smartphone's existing communication capabilities are leveraged to handle V2P messages, making the system universally applicable to devices users already possess.
Solution Approach 2:
The patent uses copying by implementing V2P communication functionality through software emulation on general-purpose devices. Instead of creating dedicated hardware, the system copies the essential communication protocols and message handling capabilities into software form that can run on existing smartphone platforms.
2Ease of manufacture
If BLE is used for V2P communication, then ease of implementation is improved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing discontinuous transmission and reception modes where the smartphone activates communication only at specific intervals or when events occur. This allows BLE to be used for V2P communication while significantly reducing power consumption compared to continuous operation.
Solution Approach 2:
The patent uses partial action by selectively transmitting only necessary V2P messages rather than continuously transmitting all possible data. The system transmits messages only when relevant information changes or when safety-critical communication is needed, reducing overall power consumption.
3Quantity of substance
If message size is reduced by compression, then channel usage is improved, but processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing V2P messages into structured components that can be selectively compressed. The message format is segmented into essential fields that can be efficiently encoded, reducing overall message size while maintaining the ability to reconstruct complete information when needed.
Data Source
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AI summary
In an aspect of the present disclosure, there is provided a method of transmitting a vehicle-to-pedestrian (V2P) message. The method may comprise checking whether a timer is running, generating and storing an identifier when the timer is not running, encoding a personal safety message (PSM) according to a predetermined method and storing the encoded PSM as a lead V2P message and transmitting the generated identifier and the lead V2P message.