Sidelink Resource Selection Using Mode-Based Assistance Information
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Solution Overview
Problem
The challenge of effectively allocating sidelink transmission resources in wireless communication systems to improve sidelink communication efficiency is not adequately addressed by existing technologies.
Innovation Solution
A method where a first terminal device obtains mode information of a second terminal device to provide assistance information indicating sets of sidelink transmission resources, allowing the second terminal device or a network device to allocate resources efficiently, thereby reducing resource conflicts and waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If terminal devices allocate sidelink transmission resources autonomously without assistance information, then device complexity and signaling overhead are reduced, but resource conflicts increase and communication efficiency deteriorates
Solution Approach 1:
The patent introduces assistance information as an intermediary that mediates resource allocation between terminal devices. The first terminal device generates assistance information indicating recommended sidelink transmission resources and sends it to the second terminal device, which uses this information to select resources. This intermediary mechanism resolves the contradiction by providing structured resource recommendations that reduce conflicts while maintaining autonomous allocation benefits.
Solution Approach 2:
The patent applies preliminary action by having the first terminal device determine and indicate suitable sidelink transmission resources in advance through assistance information. The second terminal device receives this information before making its resource selection decision, allowing it to proactively choose non-conflicting resources rather than reacting to conflicts after they occur. This preliminary resource indication improves communication efficiency while keeping the allocation process relatively simple.
2Measurement precision
If assistance information indicating sidelink transmission resources is sent between terminal devices, then resource allocation precision improves and conflicts reduce, but signaling overhead increases
Solution Approach 1:
The patent segments the resource allocation process into two parts: assistance information generation by the first terminal device and resource selection by the second terminal device. The assistance information is segmented to indicate only the necessary resource parameters (time-frequency resources) rather than complete allocation details, reducing signaling overhead while maintaining sufficient precision for effective resource selection.
3Loss of energy
If terminal devices use traditional autonomous resource selection without assistance information, then signaling overhead is minimized, but resource conflicts increase and energy consumption rises
Solution Approach 1:
The assistance information acts as an intermediary that enables more efficient autonomous resource selection. By providing recommended resources, it reduces the need for terminal devices to perform extensive channel sensing and conflict resolution, thereby reducing energy consumption related to repeated transmission attempts and channel monitoring, while the signaling overhead remains manageable due to the compact format of the assistance information.
Data Source
AI summary
Embodiments of this application provide a wireless communication method and a related apparatus and system. The method includes obtaining mode information of a second terminal device. The mode information indicates a resource scheduling manner of the second terminal device. The method also includes sending assistance information to the second terminal device based on the mode information. The assistance information indicates one or more sets of sidelink transmission resources. Based on this solution, it can reduce resource conflicts or resource wastes, and therefore can properly and effectively allocate the sidelink transmission resource. In this way, sidelink communication efficiency can be improved.