Sidelink Relay Communication for Coverage and Battery Efficiency
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Solution Overview
Problem
There is a need for effective sidelink relay utilization schemes that support service coverage extensions, data transfer reliability increases, and terminal power consumption reductions in wireless communication systems.
Innovation Solution
A method and device for managing relay communication through a sidelink relay terminal, involving identifying resources for transmitting a sidelink discovery message, selecting a destination identifier, and allocating logical channels for efficient data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay communication is implemented to extend service coverage, then coverage area is improved, but device complexity increases
Solution Approach 1:
The patent introduces a relay terminal as an intermediary device that establishes indirect communication paths between remote terminals and the network. The relay terminal acts as a mediator that forwards data and control signals, enabling extended coverage without requiring direct network infrastructure in remote areas. This resolves the contradiction by using an intermediate relay node rather than directly extending base station coverage.
Solution Approach 2:
The communication system is segmented into multiple hops: direct communication for nearby terminals and relay-assisted communication for remote terminals. The patent divides the communication task into separate functions - direct transmission for short distances and relay forwarding for extended distances. This segmentation allows the system to maintain simple direct communication when possible while enabling complex relay communication only when necessary for coverage extension.
2Reliability
If relay communication is used to increase data transfer reliability, then transmission reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic relay selection and activation mechanisms where the system adaptively determines when to use relay communication based on channel conditions, distance, and service requirements. Rather than always using relay communication, the system dynamically switches between direct and relay-assisted modes, activating relay functions only when reliability requirements justify the additional energy consumption. This dynamic approach resolves the contradiction by optimizing the trade-off between reliability and energy usage based on real-time conditions.
3Productivity
If resource allocation for sidelink discovery messages is optimized, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements pre-configuration of resource pools for sidelink discovery messages, where resource allocations are predetermined and prepared in advance. Rather than performing complex real-time resource allocation, the system pre-assigns time-frequency resources for discovery message transmission, reducing the computational complexity during actual operation. This preliminary action resolves the contradiction by shifting complexity from runtime decision-making to offline configuration, improving communication efficiency while managing system complexity.
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. In the present disclosure, the method performed by a first terminal in a wireless communication system may comprise the steps of: transmitting, to a user equipment to user equipment (U2U) relay terminal, a direct communication request message for a second terminal on the basis of sidelink radio bearer (SLRB) configuration information for relaying communication between the first terminal and the second terminal; performing PC5 security configuration for direct communication with the second terminal; receiving, from the U2U relay terminal, a direct communication accept message for the second terminal; and performing direct communication with the second terminal through the U2U relay terminal.