NR-V2X Resource Selection Using Terminal-Provided Resource Sets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing resource selection mode in NR-V2X systems leads to issues such as hidden node, half duplex, exposed node, and high power consumption during resource selection, which affect the reliability and efficiency of wireless communication.
Innovation Solution
A first terminal device indicates a second terminal device to provide a first resource set, allowing the first terminal device to select a transmission resource based on this set to avoid interference and improve reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminal devices select transmission resources randomly or based on sensing results, then resource selection simplicity is improved, but hidden node, half duplex, and exposed node problems occur
Solution Approach 1:
The patent introduces a base station as an intermediary to allocate transmission resources to terminal devices. The base station receives resource allocation requests from terminals, determines appropriate resources based on system state and terminal positions, and assigns resources to avoid conflicts. This intermediary coordination eliminates hidden node, half duplex, and exposed node problems by centralizing resource management while maintaining operational simplicity for terminals.
2Object-affected harmful factors
If terminal devices perform sensing-based resource selection, then interference avoidance is improved, but power consumption increases
Solution Approach 1:
The base station performs preliminary resource allocation before terminal transmission, determining suitable resources based on system state, terminal positions, and potential interference scenarios. By pre-assigning resources that are guaranteed to be non-conflicting, the system eliminates the need for terminals to perform continuous sensing operations, thereby reducing power consumption while maintaining interference avoidance capabilities.
3Device complexity
If terminal devices autonomously select resources from resource pool, then device complexity is reduced, but resource selection reliability deteriorates
Solution Approach 1:
The base station acts as a mediator that handles the complex resource selection logic centrally. Terminals simply request resources and receive assignments without needing to implement complex sensing, collision detection, or conflict resolution algorithms. This shifts the complexity from distributed terminals to a centralized base station, reducing terminal device complexity while improving resource selection reliability through coordinated management.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A wireless communication method and a terminal device are provided, which can avoid occurrence of problems such as hidden node, half duplex, exposed node, etc. during resource selection, thereby improving reliability of resource selection. The method includes the following. A first terminal device sends first information to a second terminal device, where the first information indicates that the second terminal device is to provide a first resource set, and the first resource set is used for the first terminal device to select a transmission resource.