Sidelink Resource Allocation via Mobility-Based Mode Selection
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Solution Overview
Problem
In 5G communication systems, terminals moving at high speeds often experience degraded sidelink communication performance due to changes in zones, leading to resource collisions and inefficient resource allocation.
Innovation Solution
A method for allocating sidelink resources based on the terminal's speed, categorizing resource allocation schemes into type1 and type2, where type1 allocates resources on an area basis and type2 allocates resources on a zone basis, ensuring seamless communication even when the terminal changes zones within the same area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If zone-based resource allocation is used, then resource allocation precision is improved, but terminal communication reliability deteriorates when moving between zones
Solution Approach 1:
The patent segments the resource allocation system into two independent dimensions: area-level resource pools and zone-level resource pools. This segmentation allows the system to maintain zone-level precision for resource allocation while using area-level pools as a backup mechanism when zone boundaries are crossed, thereby resolving the contradiction between allocation precision and communication reliability during terminal movement.
2Reliability
If area-based resource allocation is used, then communication reliability is maintained during zone changes, but resource allocation precision deteriorates
Solution Approach 1:
The patent implements a dynamic resource selection mechanism that adapts the allocation strategy based on terminal mobility state. The terminal determines whether to use area-based or zone-based allocation by comparing its speed against predefined thresholds. This dynamic adjustment allows the system to maintain reliability for high-speed terminals while providing precise allocation for low-speed terminals, resolving the contradiction between reliability and precision.
3Reliability
If speed-based resource allocation selection is implemented, then communication performance is improved, but device complexity increases
Solution Approach 1:
The patent changes the allocation parameter from fixed zone-based or area-based to variable speed-based selection. By using terminal speed as the determining parameter, the system automatically selects the appropriate allocation strategy without requiring complex manual configuration. This parameter change simplifies device operation while improving communication performance, as the terminal autonomously determines the optimal allocation method based on its current mobility state.
Data Source
AI summary
Disclosed is a resource allocation method in sidelink communication. An operation method of a terminal includes the steps of: receiving a first message, including mobility conditions to be used for selecting a resource allocation mode for sidelink communication, from a base station; selecting the resource allocation mode to be applied to the terminal, the selection being made on the basis of the results of a comparison between the mobility of the terminal and the mobility conditions; determining a resource pool on the basis of the selected resource allocation mode; and performing the sidelink communication by using the determined resource pool. Accordingly, the performance of a communication system can be enhanced.