Network-Selected Relay UE for Reliable 5G Sidelink Forwarding
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Solution Overview
Problem
The performance of user equipment (UE) relay communication in 5G NR systems is inadequate due to limited channel monitoring and information for CUE selection, leading to suboptimal data forwarding.
Innovation Solution
A network device selects appropriate relay UE based on comprehensive measurement reports and assistance information, including signal quality and load, to improve system performance by ensuring reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the TUE selects CUE based solely on signal quality between TUE and CUE, then the selection process is simple, but the data forwarding performance is insufficient and cannot meet network system performance conditions
Solution Approach 1:
The patent changes the selection parameters from solely signal quality to multiple parameters including signal quality, load information, and communication status. The network device obtains measurement reports containing signal quality and additional assistance information (load, communication status) to make comprehensive CUE selections, thereby improving data forwarding performance while maintaining manageable selection complexity through automated network-side processing
2Device complexity
If the TUE monitors only channel status between TUE and CUE, then the monitoring scope is limited, but the information available for CUE selection is insufficient
Solution Approach 1:
The patent adds multiple dimensions to the monitoring and information collection system. Instead of only monitoring channel status, the network device collects signal quality measurements, load information, and communication status from multiple CUEs. This dimensional expansion provides comprehensive information for CUE selection while the network device centrally processes this information to maintain system manageability
3Reliability
If the network device selects relay UE based on comprehensive measurement reports and assistance information, then the data transmission reliability is improved, but the selection process complexity increases
Solution Approach 1:
The network device acts as an intermediary that centralizes the complex selection process. Instead of requiring the TUE to independently evaluate multiple parameters and make decisions, the network device receives measurement reports and assistance information from TUE and CUE, processes this information according to network policies, and makes the final selection. This intermediary approach improves reliability while managing complexity centrally
Data Source
AI summary
Embodiments of this application disclose a relay communication method and a communications apparatus, and relate to the field of communications technologies, to resolve a problem that communications system performance is unable to be met because remote UE selects relay UE to forward data in existing relay communication. The method includes a network device obtains a measurement report that includes signal quality of a sidelink (sidelink, SL) between first user equipment and at least one second user equipment and a radio network identifier of the at least one second user equipment. The network device selects target relay user equipment, of the first user equipment, from the at least one second user equipment based on the measurement report and selection assistance information associated with each second user equipment.