V2X Relay Scheme Based on Resource Usage Rate
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting V2X messages due to high resource usage rates in V2X communication, leading to potential collisions and unstable message reception in densely populated areas, especially with the increasing number of vehicles.
Innovation Solution
A method is proposed where a UE calculates the resource usage rate of direct links between UEs and determines a relay scheme by comparing this rate to a predetermined threshold, deciding whether to transfer V2X messages directly or via an eNB, based on factors like message type, UE type, and network resource availability, to minimize collisions and ensure reliable transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If V2X messages are transmitted directly between UEs using direct links, then transmission speed and efficiency are improved, but message collisions increase in densely populated areas due to high resource usage rates
Solution Approach 1:
The system dynamically switches between direct transmission and relay transmission modes based on real-time resource usage rate conditions. When the resource usage rate exceeds a threshold, the transmission mode changes from direct to relay via eNB, and vice versa. This dynamic adaptation resolves the contradiction by adjusting the transmission approach according to environmental conditions.
Solution Approach 2:
The eNB serves as an intermediary relay node for V2X message transmission when direct link resource usage is too high. Instead of direct UE-to-UE transmission, messages are routed through the eNB, which reduces collisions on direct links while maintaining communication reliability. This intermediary approach allows the system to maintain transmission speed while improving reception stability in dense scenarios.
2Reliability
If more relay nodes are deployed to reduce message collisions, then message reception stability is improved, but system complexity and resource overhead increase
Solution Approach 1:
The system uses existing eNB infrastructure as relay nodes rather than deploying dedicated relay devices. The eNB, which is already part of the network infrastructure, leverages its existing resources to provide relay functionality. This approach improves message reception stability without significantly increasing system complexity, as the relay capability is implemented using existing network elements.
Solution Approach 2:
The eNB performs multiple functions including both traditional cellular communication and V2X message relaying. By making the eNB universal and multi-functional, the system avoids adding dedicated relay infrastructure, thereby improving reliability through relay capability while minimizing increases in system complexity.
3Productivity
If direct link resources are allocated to more UEs to support increased vehicle density, then productivity is improved, but resource usage rate increases leading to more collisions
Solution Approach 1:
The system segments V2X message transmission into two separate paths: direct transmission path and relay transmission path through eNB. When resource usage on direct links becomes too high, the system divides traffic by routing messages through the relay path. This segmentation allows the system to support increased vehicle density and maintain productivity while preventing resource exhaustion and collisions on any single path.
Data Source
AI summary
Disclosed is a method of transmitting and receiving a message for a communication between UEs in a wireless communication system and an apparatus using the method. Specifically, in a method of relaying a V2X message by a first UE (User Equipment) in a wireless communication system supporting V2X (Vehicle-to-Everything) communication, the method may comprise steps of receiving the V2X message from a second UE, calculating a resource usage rate of a direct link between UEs, determining a relay scheme of the V2X message, by comparing the calculated resource usage rate and a predetermined threshold, and transferring the V2X message to a third UE based on the determined relay scheme.