Sidelink Channel Access Sharing for Priority-Based COT Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sidelink (SL) communication technologies face challenges in managing channel occupancy time (COT) sharing and channel access procedures, particularly in unlicensed spectra, leading to inefficient and potentially conflicting transmissions between UE-to-UE and Uu interface operations.
Innovation Solution
Implementing a type I channel access procedure that allows for independent COT management and prioritization of transmissions based on priority values, ensuring that subsequent transmissions use the ongoing or existing channel access procedure if priority conditions are met, and enabling separate COT determination for SL and Uu transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a type I channel access procedure is performed for each transmission independently, then channel access reliability is improved, but transmission efficiency deteriorates due to repeated sensing and counter initialization
Solution Approach 1:
The patent merges multiple channel access procedures by allowing a second transmission to use the ongoing channel access procedure of a first transmission when priority conditions are met. This combines what would otherwise be separate sensing windows and counter decrements into a single unified procedure, improving transmission efficiency while maintaining reliability through priority-based access control.
2Reliability
If separate COT management is implemented for SL and Uu transmissions, then transmission reliability is improved, but system complexity increases
Solution Approach 1:
The patent segments COT management by introducing separate COT determination mechanisms for SL and Uu transmissions. Each interface can independently determine its COT based on its own priority value, allowing reliable separate management while the patent reduces complexity by providing clear rules for when to use shared versus separate procedures.
Solution Approach 2:
The patent implements dynamic COT sharing where the system can switch between shared and separate COT management based on priority conditions. When transmissions have the same priority, COT sharing is enabled; when priorities differ, separate COT management is used. This dynamic approach maintains reliability while adapting system complexity to actual transmission needs.
3Productivity
If subsequent transmissions use the ongoing channel access procedure, then transmission efficiency is improved, but channel access reliability may deteriorate due to potential priority conflicts
Solution Approach 1:
The patent applies local quality by making the channel access procedure priority-dependent. The decision to use an ongoing procedure or initiate a new one is made locally based on the specific priority values of the transmissions involved. This ensures that high-priority transmissions always get appropriate access while maintaining efficiency for same-priority transmissions.
Solution Approach 2:
The patent performs preliminary priority comparison before allowing a transmission to use an ongoing channel access procedure. By checking priority values in advance and establishing clear conditions for procedure sharing, the patent prevents priority conflicts before they occur, maintaining both efficiency and reliability.
Data Source
AI summary
A wireless communication method for use in a wireless terminal is disclosed. The method comprises performing a second channel access procedure for a second transmission which is after a first transmission by using a first channel access procedure for the first transmission.