Sidelink Relay Selection Using UE Capability and Network State
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Solution Overview
Problem
Remote user equipment in a cellular communication system may fail to select an appropriate relay user equipment, leading to inadequate sidelink communication performance.
Innovation Solution
A method for selecting an appropriate relay user equipment by transmitting and receiving messages containing information about network and sidelink communication states, as well as relay capabilities, enabling the remote user equipment to establish an effective sidelink connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay user equipment selection is performed without comprehensive information exchange, then device complexity is reduced, but reliability of sidelink communication deteriorates
Solution Approach 1:
The patent applies preliminary action by having relay UEs transmit relay capability information and network communication state information proactively before the remote UE makes its selection decision. This allows the remote UE to receive necessary information in advance without requiring complex real-time negotiation, thus improving selection reliability while controlling complexity.
Solution Approach 2:
The patent implements feedback mechanisms where relay UEs provide feedback information about their network connection status and capabilities to remote UEs. This feedback loop enables the remote UE to make informed selection decisions based on actual relay performance indicators, improving communication reliability through data-driven selection.
2Reliability
If comprehensive relay selection information is transmitted, then reliability of relay selection is improved, but loss of energy increases
Solution Approach 1:
The patent applies local quality by having relay UEs transmit only the specific capability information and network state information that is locally relevant and necessary for the selection decision. This targeted information exchange reduces unnecessary energy consumption while maintaining selection accuracy, as each UE transmits only the specific data needed for proper relay selection.
3Reliability
If relay UE selection is performed without network communication state information, then ease of operation is improved, but reliability of communication deteriorates
Solution Approach 1:
The patent implements self-service by having relay UEs automatically include their network communication state information and capability information in their transmissions. This automatic inclusion eliminates the need for manual configuration or complex selection procedures, as the remote UE can directly use the received information for selection, thereby maintaining ease of operation while improving reliability.
Data Source
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AI summary
A communication control method used in a cellular communication system includes transmitting, by a relay user equipment having a capability of relaying data of a remote user equipment, a message including information related to the relay user equipment, receiving, by the remote user equipment, the message, and performing, by the remote user equipment, processing that establishes sidelink connection between the remote user equipment and the relay user equipment, based on the message.