Relay Device Selection via Sidelink Channel Quality Feedback
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Solution Overview
Problem
The reliability of relay device selection in wireless communication systems is poor, especially for devices at the edge of or outside the base station's coverage, leading to unstable D2D communication services and increased system power consumption.
Innovation Solution
A method where a remote device determines channel quality information for bidirectional sidelinks with candidate relay devices, selecting the most suitable relay based on pre-configured thresholds for parameters like CSI, CQI, SINR, and error rates, to improve reliability and reduce communication burden on the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay device selection is performed for devices at the edge of or outside base station coverage, then network coverage is extended and D2D communication is enabled, but the reliability of relay device selection is poor leading to unstable communication services
Solution Approach 1:
The patent implements feedback mechanisms where the remote device measures channel quality information (CQI) of sidelinks with candidate relay devices and feeds back this information to the base station. The base station uses this feedback to determine suitable relay devices, creating a closed-loop system that improves selection reliability through continuous quality assessment and adjustment.
Solution Approach 2:
The patent replaces traditional mechanical or heuristic relay selection methods with signal-based measurement and evaluation systems. By using channel quality information (CQI) measurements of sidelinks and substituting random or distance-based selection with quality-driven selection, the system achieves more reliable and adaptive relay device selection.
2Loss of energy
If relay technology is used to expand coverage, then system power consumption is reduced and base station communication burden is decreased, but the reliability of service provision to edge and out-of-coverage devices remains poor
Solution Approach 1:
The patent establishes feedback loops where channel quality measurements are continuously monitored and used to adjust relay device selection. This ensures that energy-efficient relay operations maintain service reliability by selecting relays based on actual channel conditions rather than static criteria.
Solution Approach 2:
The patent changes the selection parameter from simple distance or signal presence to comprehensive channel quality information (CQI) including signal strength, interference levels, and link quality metrics. This parameter transformation enables reliable relay selection that optimizes energy consumption while maintaining service quality.
3Device complexity
If traditional relay selection methods are used, then device complexity is reduced, but the communication burden of the base station increases and coverage expansion is limited
Solution Approach 1:
The patent segments the relay selection process into distinct functional modules: channel quality measurement, CQI calculation, feedback transmission, and base station decision-making. This segmentation distributes complexity across multiple components rather than concentrating it in one device, enabling sophisticated selection while maintaining manageable system architecture.
Solution Approach 2:
The patent introduces channel quality information (CQI) as an intermediary that mediates between the remote device and candidate relay devices. This intermediary provides structured measurement data that simplifies the base station's selection decision while enabling comprehensive quality assessment, reducing communication burden through efficient information exchange.
Data Source
AI summary
The present application relates to the field of wireless communications, and in particular to a relay device selection method and device, and a computer storage medium, which are used for selecting a relay device for a remote device. In the embodiments of the present application, a remote device determines channel quality information of a first sidelink between the remote device and at least one candidate relay device and channel quality information of a second sidelink therebetween, and selects a relay device to be used from among the at least one candidate relay device according to the channel quality information of the first sidelink corresponding to the candidate relay device and the channel quality information of the second sidelink corresponding thereto.