Sidelink Relay Selection via Dual-Link Quality Intersection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication technologies for Device-to-Device (D2D) relay in UE-to-UE scenarios fail to ensure reliable communication when the communication distance is limited or channel quality is poor, as they only consider the channel quality between the UE and the relay, neglecting the quality of the channel between the two UEs.
Innovation Solution
A relay selection method that considers the quality of both the link between the first terminal and candidate relays and the link between the second terminal and candidate relays, selecting a preferred relay based on the intersection of candidate relay sets to ensure suitable communication for both UEs in sidelink scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay selection only considers channel quality between UE and relay, then device complexity is reduced, but communication reliability deteriorates in limited distance or poor channel scenarios
Solution Approach 1:
The relay selection process is segmented into two independent stages: first, each terminal independently determines its own candidate relay set based on its link quality to potential relays; second, the intersection of these two sets is computed to select the final relay. This segmentation allows each terminal to perform simple independent evaluations while the system achieves reliable dual-link selection through set intersection.
2Reliability
If relay selection considers both links between terminals and relays, then communication reliability is improved, but device complexity increases
Solution Approach 1:
Each terminal performs a partial evaluation by determining its own candidate relay set based solely on its link quality, which is less than the full evaluation required for optimal dual-link selection. The excessive action of computing the intersection of two sets then completes the selection process, ensuring both links are satisfactory without requiring each terminal to perform the complete complex evaluation alone.
Data Source
AI summary
A relay selection method and device for a sidelink, a storage medium and a terminal are provided. The sidelink is a communication link between a first terminal and a second terminal, and the method includes: receiving a first message, wherein the first message includes a first candidate relay set including at least one first candidate relay, quality of a first link between the first terminal and the at least one first candidate relay reaches a preset threshold; selecting a preferred relay from the first candidate relay set based on quality of a second link between the second terminal and the at least one first candidate relay in the first candidate relay set; and determining the preferred relay as a relay of the first terminal and the second terminal on the sidelink.