Roadside Sidelink Relay Communication for Obstructed Vehicle Links
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Solution Overview
Problem
Conventional Sidelink communication technologies do not effectively extend communication range due to limitations in direct wireless communication, particularly in environments with obstructions such as buildings or intersections with poor visibility, where vehicles cannot establish connections efficiently.
Innovation Solution
Implementing roadside apparatuses with Sidelink relay functions that determine compatibility and relay messages between communication devices using Layer-2 IDs, allowing vehicles to communicate through these apparatuses even when direct communication is not possible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If direct wireless communication is used between vehicles, then communication simplicity is maintained, but communication range is limited in environments with obstructions
Solution Approach 1:
The patent introduces roadside apparatuses as intermediary devices that relay communication signals between vehicles. When direct wireless communication between vehicles is blocked by obstructions such as buildings or terrain, the roadside apparatus receives signals from one vehicle and retransmits them to the destination vehicle, thereby extending the effective communication range without requiring complex multi-hop routing protocols at the vehicle level.
2Adaptability or versatility
If relay apparatuses are introduced to extend communication range, then communication coverage is improved, but system complexity increases
Solution Approach 1:
The roadside apparatus is designed to perform multiple functions: it serves as a relay station for extending communication range, acts as a base station for providing network access, and can function as an information collection point for traffic management. This multi-functionality reduces the need for separate dedicated relay devices, thereby limiting the increase in system complexity while improving communication coverage.
3Reliability
If vehicles communicate directly using Layer-2 IDs, then communication efficiency is maintained, but communication fails in obstructed environments
Solution Approach 1:
The roadside apparatus acts as an intermediary that maintains the simplicity of Layer-2 ID-based communication while enabling reliable communication in obstructed environments. The relay vehicle and destination vehicle continue to use Layer-2 IDs for identification, but the roadside apparatus mediates the signal transmission, ensuring that the communication protocol remains simple while reliability is improved in challenging environments.
Data Source
AI summary
A communication apparatus having a Sidelink communication function includes a determination unit configured to determine whether another communication apparatus and a relay apparatus having a Sidelink relay function are able to communicate directly with each other; and a communication unit configured to, in a case where the other communication apparatus and the relay apparatus are determined to be unable to communicate directly with each other by the determination unit, transfer a message to be transmitted and received between the other communication apparatus and the relay apparatus.