Geographic Area Messaging for Selective V2X Feedback
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Solution Overview
Problem
In vehicle-to-vehicle (V2V) and vehicle-to-everything (V2X) communication systems, feedback from distant receivers can degrade system performance due to the highly mobile nature of transmitters and receivers, leading to inefficient retransmissions and resource waste.
Innovation Solution
Transmitting devices provide geographic area information in messages to enable receiving devices to determine if they are intended receivers, thereby limiting unnecessary feedback by indicating the intended geographic area for message reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If receiving devices send feedback for all received messages without geographic area indication, then feedback reliability is improved, but system resources are wasted due to futile retransmissions from distant receivers
Solution Approach 1:
The patent introduces geographic area indication as an intermediary element in the message structure. This intermediary carries spatial information that enables receiving devices to determine their eligibility for feedback without requiring direct geographic coordination between all devices, thus resolving the contradiction between feedback reliability and resource efficiency
Solution Approach 2:
The patent modifies the message parameters by adding geographic area indication fields. This parameter change enables receiving devices to use their own geographic information to determine whether they should send feedback, thereby eliminating futile retransmissions while maintaining reliable feedback from appropriate devices
2Reliability
If receiving devices provide feedback for all messages, then communication reliability is improved, but retransmission efficiency deteriorates due to mobile nature of devices
Solution Approach 1:
The patent implements preliminary action by including geographic area indication in the original message transmission. This allows receiving devices to pre-determine their feedback eligibility based on their geographic location before actually sending feedback, preventing unnecessary retransmissions while maintaining communication reliability
Solution Approach 2:
The patent refines the feedback mechanism by making it conditional rather than universal. Receiving devices use the geographic area indication to intelligently determine whether to send feedback, creating a selective feedback system that maintains reliability for appropriate devices while improving retransmission efficiency by avoiding futile feedback from distant or unsuitable devices
Data Source
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AI summary
An improved manner of transmitting and receiving messages in V2X/V2V/D2D is presented in which a transmitting device determines a geographic location of the mobile transmitting device and generates a message for a service group having a group ID associated with the service group, the message comprising a first indication of a geographic area associated with the message, the geographic area based at least in part on the geographic location of the transmitting device. Then, the apparatus transmits the message to the service group, e.g., via V2X/V2V/D2D communication. A receiving device then determines its geographic location and determines whether to send a feedback for the message based on the first indication of the geographic area associated with the message and the geographic location of the receiving device.