UE Relay Selection Using Sidelink Measurement Thresholds
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Solution Overview
Problem
In UE-to-UE relay scenarios, existing technologies lack efficient methods for determining whether a UE can serve as a relay and effectively communicate relay-related messages, leading to suboptimal relay operations.
Innovation Solution
A UE determines its suitability as a relay by performing sidelink measurements, such as SL-RSRP and SD-RSRP, and broadcasts or forwards messages based on predefined thresholds, enabling efficient relay functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE performs sidelink measurements and broadcasts notification messages to determine relay capability, then the reliability of relay selection is improved, but the energy consumption increases
Solution Approach 1:
The patent applies preliminary action by having the relay UE perform sidelink measurements (SL-RSRP, SD-RSRP) and broadcast notification messages before actual relay communication begins. This allows the UE to pre-determine its relay capability and status, enabling reliable relay selection without continuous energy-consuming operations during the actual data transmission phase.
2Productivity
If the relay UE broadcasts notification messages periodically to announce relay availability, then the communication efficiency is improved, but the overhead increases
Solution Approach 1:
The patent implements periodic action by having the relay UE broadcast notification messages at predetermined intervals rather than continuously. This periodic broadcasting mechanism ensures that other UEs can discover relay availability at any time while significantly reducing the total message overhead compared to continuous broadcasting, thus balancing communication efficiency with resource consumption.
3Adaptability or versatility
If the UE forwards discovery solicitation and response messages to enable relay communication, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the relay UE to perform multiple functions: it simultaneously performs sidelink measurements, determines relay capability, broadcasts notification messages, and forwards discovery solicitation/response messages. This multi-functional approach enables the relay UE to adapt to various communication scenarios (direct connection, relay connection, both types) without requiring separate dedicated mechanisms for each function, thereby reducing overall system complexity while maintaining high adaptability.
Data Source
AI summary
A method for processing relay communication is performed by a first user equipment (UE), and includes: obtaining a sidelink measurement between the first UE and a second UE, wherein the sidelink measurement includes at least one of sidelink reference signal receiving power (SL-RSRP) or sidelink-discovery reference signal receiving power (SD-RSRP); determining whether the first UE is able to serve as a relay UE, according to the sidelink measurement between the first UE and the second UE and a predefined threshold; and broadcasting a notification message periodically, in response to the first UE being able to serve as the relay UE.