Unlicensed Multi-Channel Sidelink Access with Priority Selection
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Solution Overview
Problem
The increasing demand for mobile broadband communication and V2X services requires efficient sidelink communication solutions that address the overhead of base stations and ensure reliable, low-latency data transmission in shared spectrum environments.
Innovation Solution
A method and apparatus for performing sidelink communication by obtaining information on multiple channels, selecting a representative sidelink channel access priority class, and performing channel access based on this priority during a sensing duration, utilizing a shared spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple channels are used for sidelink communication in shared spectrum, then communication capacity and reliability are improved, but channel access complexity and collision risk increase
Solution Approach 1:
The patent segments the channel access process into distinct phases: first obtaining channel information for multiple channels, then selecting a representative channel access priority class, and finally performing channel access based on the selected priority class. This segmentation reduces complexity by breaking down the multi-channel access problem into manageable steps.
Solution Approach 2:
The patent applies a universal channel access mechanism that works across multiple channels by selecting a representative priority class that governs access to all selected channels. This multi-functional approach allows a single priority class selection to manage access to multiple channels, reducing overall system complexity while maintaining reliability.
2Reliability
If channel sensing duration is extended to improve channel access accuracy, then channel selection reliability is improved, but transmission latency increases
Solution Approach 1:
The patent performs preliminary channel information obtaining and priority class selection before the actual transmission. By pre-selecting a representative priority class based on channel information, the system reduces the need for extended real-time sensing during transmission, thereby reducing latency while maintaining selection reliability.
Solution Approach 2:
The patent dynamically selects a representative priority class from multiple channel access priority classes based on the obtained channel information. This dynamic selection allows the system to adaptively balance between sensing duration and transmission speed, optimizing the trade-off between reliability and latency based on actual channel conditions.
Data Source
AI summary
Provided are a method by which a first device performs wireless communication and an apparatus supporting same. The method may comprise the steps of: acquiring information related to a first channel on a shared spectrum; acquiring information related to a second channel on the shared spectrum; acquiring first data to be transmitted on the first channel and second data to be transmitted on the second channel; selecting a representative sidelink (SL) channel access priority class (CAPC); and during a first channel sensing duration that is on the basis of the representative SL CAPC, performing first type channel access to the first channel and the second channel.