Sidelink Resource Reselection Through UE Coordination
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Solution Overview
Problem
Wireless communication systems, particularly in V2X systems, face challenges with increased resource collisions, decreased battery life, and latency due to sidelink interference and power constraints in UE devices, especially in transmit-only UEs that lack sidelink receiving capabilities.
Innovation Solution
A UE device detects sidelink collisions and interference issues, reporting them to a base station, which coordinates resource reselection and allocation to minimize collisions and reduce latency and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If transmit-only UEs are deployed to reduce device complexity and power consumption, then device capabilities and energy efficiency are improved, but resource collision detection and avoidance capabilities deteriorate
Solution Approach 1:
The patent introduces a base station as an intermediary entity that receives collision reports from receiving UEs and generates resource reselection commands for transmit-only UEs. The base station mediates the communication between UEs, enabling collision avoidance without requiring transmit-only UEs to have full sensing and detection capabilities. This resolves the contradiction by maintaining energy efficiency while improving reliability through network-assisted resource management.
2Adaptability or versatility
If UEs autonomously sense and select sidelink resources, then resource allocation flexibility is improved, but resource collisions and interference increase
Solution Approach 1:
The patent implements a feedback mechanism where receiving UEs detect resource collisions and report them to the base station. The base station then provides corrective feedback in the form of resource reselection commands to the transmitting UEs. This feedback loop maintains autonomous resource selection flexibility while reducing collisions through network-guided resource reassignment based on actual collision observations.
3Device complexity
If transmit-only UEs operate without sidelink receiving capabilities, then device complexity is reduced, but communication reliability and interference management deteriorate
Solution Approach 1:
The base station acts as an intermediary that compensates for the lack of receiving capabilities in transmit-only UEs. By centralizing the collision detection function at the base station and using it to generate resource reselection commands, the system maintains communication reliability without requiring complex receiving hardware in all UEs. This resolves the contradiction between device simplicity and communication reliability.
Data Source
AI summary
A user equipment (UE) may detect a collision or interference issues of a second UE and transmit information regarding the detected collision to a base station. The second UE may not able to sense the channel on its own and thus may inadvertently use resources already reserved or in use by other UEs. The information regarding the detected collision may include layer-1 identifiers (L1 IDs) and/or layer-2 identifiers (L2 IDs) corresponding to the UE and/or the second UE as well as additional information corresponding to the resource collision. This information may be usable by the base station in determining that the base station has previously communicated with the second UE and may trigger a resource reselection by the second UE. The UE may receive sidelink communications on one or more reselected sidelink transmission resources from the second UE.