Unicast Communication via Transmission-Quality Relay Selection
Solution Overview
Problem
Existing wireless communication systems face challenges in selecting an appropriate relay UE for unicast connections between user equipments (UEs) due to insufficient hardware capabilities, limiting communication distance, and lacking effective methods for relay UE selection in establishing unicast connections.
Innovation Solution
A method where a relay device participates in selecting an appropriate relay UE by evaluating transmission quality based on RSRP thresholds and considering different cases between the initiating UE and the target UE, using RSRP, SNR, SINR, or CSI to determine the suitability of relay devices for unicast connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If relay UEs are introduced to extend communication distance, then communication range is improved, but relay UE selection complexity increases
Solution Approach 1:
The patent changes the selection parameter from simple signal strength to a composite evaluation including RSRP thresholds, SNR, SINR, and CSI. This multi-parameter approach improves relay selection accuracy to handle extended communication ranges while managing selection complexity through standardized metrics.
Solution Approach 2:
The patent replaces manual or simple relay selection with an automated evaluation mechanism using RSRP thresholds and channel quality metrics. This substitution reduces selection complexity by providing systematic, objective criteria for relay UE selection in extended communication scenarios.
2Reliability
If relay UE selection is performed without transmission quality evaluation, then selection process is simplified, but connection reliability decreases
Solution Approach 1:
The patent introduces transmission quality parameters (RSRP thresholds, SNR, SINR, CSI) to evaluate relay UE suitability. This ensures connection reliability by selecting relays with adequate signal quality while managing complexity through standardized measurement procedures.
Solution Approach 2:
The patent implements feedback mechanisms where UEs report channel quality information and relay selection decisions are made based on evaluated transmission quality. This feedback loop ensures reliable connections by continuously assessing relay suitability while maintaining systematic selection processes.
3Reliability
If multiple relay UEs are considered for unicast connection, then connection quality is improved, but selection time increases
Solution Approach 1:
The patent uses RSRP thresholds as a primary filtering criterion to quickly evaluate multiple relay candidates. This approach improves connection quality by considering multiple relays while reducing selection time through threshold-based pre-screening of candidate UEs.
Solution Approach 2:
The patent performs preliminary evaluation of relay candidates using RSRP thresholds and channel quality metrics before final selection. This preliminary action filters suitable relays in advance, improving connection quality through multiple candidate assessment while reducing actual selection time.
Data Source
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AI summary
This application provides a unicast communication method and apparatus. The method includes: A first relay device receives a first message sent by a first terminal device, where the first message includes a first identifier of a second terminal device. The first relay device sends a second message to the second terminal device when transmission quality of the first message meets a first preset condition, where the second message is for establishing a first unicast connection, and the first unicast connection is a unicast connection established between the first terminal device and the second terminal device through the first relay device. According to the unicast communication method provided in this application, an appropriate relay device is selected in a unicast connection establishment process. This helps improve a success rate of the unicast connection and communication quality of unicast communication.