Sidelink Resource Coordination to Prevent NR V2X Collisions
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Solution Overview
Problem
In wireless communication systems, particularly in New Radio (NR) vehicle-to-everything (V2X) environments, resource collisions among multiple user equipment (UEs) can occur, leading to delays in V2X communication.
Innovation Solution
A method and apparatus for resource selection in wireless communication systems, involving a coordination user equipment (C-UE) that requests and performs resource coordination by explicitly signaling information to a transmitting UE (Tx UE), allowing the Tx UE to select sidelink resources based on the coordination message, thereby preventing resource collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple UEs independently select sidelink resources for V2X communication, then resource allocation flexibility is improved, but resource collision probability increases
Solution Approach 1:
The patent introduces a coordination UE (C-UE) as an intermediary that mediates resource selection between multiple UEs. The C-UE receives resource selection information from transmitting UEs, determines coordinated resource sets to avoid collisions, and provides coordination messages back to the UEs. This intermediary mechanism maintains the flexibility of distributed resource selection while preventing resource collisions through centralized coordination.
2Reliability
If resource coordination procedure is implemented to prevent collisions, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The coordination UE performs resource coordination autonomously based on received resource selection information from transmitting UEs. The C-UE independently determines coordinated resource sets and generates coordination messages without requiring network intervention or complex multi-UE negotiation protocols. This self-service approach improves reliability through coordinated resource selection while minimizing system complexity by avoiding elaborate coordination infrastructure.
3Measurement precision
If explicit signaling is used for resource coordination requests, then coordination accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential coordination information needed for resource selection and transmits it through optimized signaling. The coordination message contains specifically extracted elements such as coordinated resource set indicators and collision avoidance instructions, rather than transmitting complete resource selection data. This extraction approach maintains coordination accuracy by preserving critical information while reducing signaling overhead by eliminating redundant data.
Data Source
AI summary
Provided may be a method of supporting, by a user equipment (UE), sidelink communication in a wireless communication system. The method. of supporting, by the UE, sidelink communication in the wireless communication system may include receiving a coordination request from a transmitting UE (Tx UE); generating a coordination message based on the coordination request; and transmitting the generating coordination message to the Tx UE. Here, the coordination request may include 1-bit information and the coordination request may be received based on at least one of a physical resource set of Physical Sidelink Feedback Channel (PSFCH), a Sidelink Control Information (SCI) format, Cyclic Redundancy Checking (CRC) scrambling, and a Demodulation Reference Signal (DMRS) sequence, and the Tx UE may perform resource reselection based on the coordination message.