Wireless Terminal Resource Selection via MAC CE
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Solution Overview
Problem
In the NR-V2X system, the existing resource selection methods in mode B lead to interference issues, resource waste, and high power consumption due to hidden nodes and half-duplex operations, necessitating improved resource selection mechanisms.
Innovation Solution
A wireless communication method where a first terminal sends resource selection auxiliary information to a second terminal using a MAC CE, enabling the second terminal to perform optimized resource selection, thereby improving sidelink transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminals randomly select transmission resources in the resource pool, then resource selection is simple and fast, but interference between terminals increases and resource utilization deteriorates
Solution Approach 1:
The patent applies preliminary action by having terminals perform listening operations before resource selection to obtain resource selection auxiliary information. This preliminary listening phase enables terminals to make more informed resource selection decisions, reducing interference while maintaining the simplicity of the selection process. The auxiliary information is prepared and exchanged in advance, allowing terminals to select resources more effectively without complex real-time calculations.
2Object-affected harmful factors
If terminals perform listening operations to select resources, then interference is reduced to an extent, but power consumption increases
Solution Approach 1:
The patent applies partial action by implementing listening operations only when necessary and for limited durations. Terminals perform listening to obtain resource selection auxiliary information, but the listening is targeted and controlled rather than continuous. This partial listening approach reduces power consumption compared to continuous monitoring while still achieving sufficient interference reduction through the obtained auxiliary information.
3Ease of operation
If terminals use half-duplex operation for resource selection, then resource selection can be performed, but resource waste increases due to inability to transmit and receive simultaneously
Solution Approach 1:
The patent resolves the half-duplex limitation by performing resource selection and auxiliary information exchange in advance during listening phases. By completing the necessary information gathering before the actual transmission period, terminals can then transmit without needing to simultaneously receive, eliminating the resource waste associated with half-duplex operations during data transmission.
4Productivity
If resource selection auxiliary information is exchanged between terminals, then resource selection performance improves, but communication overhead increases
Solution Approach 1:
The patent extracts only the essential resource selection auxiliary information needed for effective resource selection, rather than exchanging complete transmission data. By selectively extracting and transmitting only the necessary auxiliary information (such as resource usage status and interference levels), the system achieves improved resource selection performance while minimizing communication overhead.
Data Source
AI summary
A wireless communication method and a terminal device are provided. The method includes: sending, by a first terminal, a first medium access control control element MAC CE to a second terminal, where the first MAC CE includes N pieces of resource combination information, the N pieces of resource combination information are used to assist the second terminal in performing resource selection, and N is a positive integer.