Sidelink Relay Switching for Mobile U2U Link Quality
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Solution Overview
Problem
In sidelink communication, the communication quality deteriorates when terminal devices move out of coverage or experience poor signal quality, affecting network and system performance.
Innovation Solution
A link switching method in sidelink communication that triggers link switching based on channel quality parameters such as RSRP, RS-SINR, or RSRQ, using relay devices to establish destination communication links with better quality when specified conditions are met, ensuring Quality of Service (QoS) requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay devices are deployed to improve coverage and communication quality, then communication quality is improved, but device complexity increases
Solution Approach 1:
The patent introduces relay devices as intermediary nodes between terminal devices to forward data when direct communication is not feasible. The relay device acts as a mediator that receives data from one terminal device and forwards it to another, enabling communication in coverage extension scenarios and improving overall communication quality when direct links are poor.
Solution Approach 2:
The patent segments the communication path into multiple hops through relay devices. Instead of requiring a direct end-to-end link between terminal devices, the communication route is divided into multiple segments (terminal device to relay device, then relay device to terminal device), allowing communication to proceed through intermediate nodes when direct communication is not possible.
2Reliability
If link switching is performed frequently to maintain communication quality, then communication quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic link switching where terminal devices monitor channel quality parameters (such as RSRP, SINR, RSRQ) and switch between source communication links and destination communication links based on real-time conditions. This dynamic adaptation allows the system to maintain communication quality by switching to better links when available, while avoiding unnecessary switching that would waste energy.
Solution Approach 2:
The patent employs feedback mechanisms where terminal devices continuously measure and report channel quality parameters. Based on this feedback, the system determines whether link switching is necessary. The feedback loop enables intelligent decision-making about when to switch links, ensuring quality maintenance while minimizing unnecessary switching operations that would consume additional power.
3Device complexity
If direct communication is used between terminal devices, then device complexity is reduced, but communication quality deteriorates when devices move out of coverage
Solution Approach 1:
The patent creates a universal communication framework that can operate in multiple modes: direct communication mode when terminal devices are within coverage, and relay-assisted mode when they are not. The system universally supports both communication paths, automatically selecting the appropriate mode based on coverage conditions, thereby maintaining simplicity for direct communication while providing quality assurance through relay assistance when needed.
Data Source
AI summary
This application discloses a link switching method in sidelink (SL) communication and an apparatus, to improve SL communication quality. The method may be implemented by using the following steps: A first communication apparatus communicates with a second communication apparatus through a first relay apparatus, where a link between the first communication apparatus and the first relay apparatus is a first source communication link, and a link between the second communication apparatus and the first relay apparatus is a second source communication link; the first communication apparatus establishes a destination communication link when a specified condition is satisfied; and the first communication apparatus communicates with the second communication apparatus through the destination communication link. When at least one of the two communication apparatuses move, quality of the link between the two communication apparatuses may deteriorate. In embodiments of this application, communication quality between two terminals is improved through link switching.