Sidelink Resource Selection for Consecutive TTIs in Unlicensed Spectrum
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing unlicensed spectrum for sidelink transmissions due to limitations in resource selection and channel access mechanisms, leading to inefficiencies and interference.
Innovation Solution
A method for configuring sidelink resource pools in unlicensed spectrum, involving sensing-based resource selection and re-selection, with parameters to determine candidate resources for consecutive Transmission Time Intervals (TTIs), ensuring effective sidelink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing-based resource selection is implemented with consecutive TTI requirements, then transmission reliability is improved, but resource selection complexity increases
Solution Approach 1:
The patent segments the resource selection process into distinct phases: sensing phase where candidate resources are identified, validation phase where consecutive TTI requirements are checked, and selection phase where final resources are chosen. This segmentation reduces complexity by breaking down the multi-step validation process into manageable stages, while ensuring reliable transmissions through systematic resource verification.
2Productivity
If resource selection window is expanded to include more candidate resources, then transmission efficiency is improved, but time consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring sensing parameters and establishing candidate resource lists before actual transmission occurs. The sensing-based resource selection performs advance detection and identification of suitable resources, so that when transmission time arrives, the UE can quickly validate and select from pre-processed candidates rather than performing comprehensive analysis in real-time, thus reducing selection time while maintaining efficiency.
3Reliability
If consecutive TTI resources are required for resource selection, then channel access reliability is improved, but available resources decrease
Solution Approach 1:
The patent changes the parameter of resource continuity by introducing flexible TTI configuration that allows non-contiguous time resources while maintaining logical consecutiveness through sensing-based validation. This parameter change enables the system to accept resources that are consecutive in the logical sensing window even if they are not strictly contiguous in physical time, thereby increasing available resources while preserving channel access reliability through proper sensing validation.
Data Source
AI summary
Methods, systems, and apparatuses are provided for sidelink transmission in unlicensed spectrum in a wireless communication system, wherein a method comprises receiving a configuration for configuring a first sidelink resource pool, triggering or requesting sensing-based resource selection or re-selection for performing one or more sidelink transmissions in the first sidelink resource pool, wherein one parameter is provided or determined or used to indicate a second number of consecutive Transmission Time Intervals (TTIs) being larger than one, determining a set of candidate resources, comprising: determining a first number of candidate resources in a resource selection window, wherein the first number of candidate resources comprises only candidate resources where each candidate resource starts in a TTI associated with the first sidelink resource pool and has the second number of consecutive TTIs in the first sidelink resource pool, and the second number of consecutive TTIs are consecutive in physical TTIs.