V2V Relay Mechanism for Message Delivery Verification
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Solution Overview
Problem
Conventional inter-vehicle communication methods face challenges in ensuring message delivery due to non-line-of-sight environments, resource collisions, and channel performance degradation, leading to reduced reception rates and inability to determine which vehicles have not received messages, thereby limiting the communication range and accuracy of adjacent vehicle information.
Innovation Solution
The method involves transmitting vehicle-to-vehicle (V2V) messages with identification information about adjacent vehicles, differentiating between two types of messages (Type 1 and Type 2) with varying intervals, and using a relay flag to determine and relay messages that have not been received, allowing for improved message delivery and reducing unnecessary relays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If V2V messages are transmitted in a broadcast manner, then the communication coverage is expanded, but the transmission reliability deteriorates because the sender cannot verify message reception
Solution Approach 1:
The patent implements a feedback mechanism where receiving vehicles send acknowledgment messages back to the transmitting vehicle. The transmitter maintains a reception status table that tracks which vehicles have received messages, enabling verification of message delivery while preserving broadcast communication coverage.
Solution Approach 2:
The patent introduces an intermediary relay vehicle mechanism where vehicles that successfully receive messages can act as relays to forward messages to other vehicles. This intermediary approach extends communication coverage while maintaining reliability through the relay feedback system.
2Loss of information
If all adjacent vehicle information is transmitted continuously, then the information completeness is improved, but the communication resource efficiency deteriorates
Solution Approach 1:
The patent segments adjacent vehicle information into two types: Type 1 messages containing complete information about all discovered adjacent vehicles transmitted at longer intervals, and Type 2 messages containing only changes in adjacent vehicle information transmitted at shorter intervals. This segmentation reduces redundant transmission while maintaining information completeness.
Solution Approach 2:
The patent implements periodic transmission with different intervals for different message types. Type 1 messages are transmitted at first intervals while Type 2 messages are transmitted at second intervals, optimizing resource usage by transmitting information at the minimum necessary frequency.
3Reliability
If relay transmission is performed for all received messages, then the message delivery reliability is improved, but the system complexity increases due to unnecessary relays
Solution Approach 1:
The patent applies local quality by enabling relay transmission only at specific vehicles based on their reception status and position. The relay decision is made locally at each vehicle based on whether it has received the message and whether there are vehicles beyond it that need the message, reducing unnecessary relays while maintaining delivery reliability.
Solution Approach 2:
The patent implements self-service where each vehicle autonomously determines whether to relay messages based on its own reception status and the reception status information it receives from others. This self-service relay mechanism reduces system complexity by eliminating the need for centralized relay control.
Data Source
AI summary
An inter-vehicle communication method and an apparatus for performing the same. The inter-vehicle communication method may include a reception node receiving at least one vehicle-to-vehicle (V2V) message from at least one transmission node and the reception node transmitting a relay V2V message on the basis of the at least one V2V message, wherein the at least one V2V message may include information about adjacent vehicles discovered by the at least one transmission node.