Sidelink Multi-Slot Resource Selection in Unlicensed Spectrum
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Solution Overview
Problem
The increasing demand for mobile broadband communication and the need for enhanced reliability and low latency in wireless communication systems, particularly in sidelink communication between UEs, is not adequately addressed by existing radio access technologies, leading to inefficiencies in resource allocation and potential interference.
Innovation Solution
A method and device for performing multi-slot based sidelink communication in unlicensed spectrum, involving the determination of a selection window and candidate multi-slot resources based on channel occupancy time (COT) duration, allowing for efficient resource selection and allocation in a resource pool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing radio access technology is used for sidelink communication, then base station overhead is reduced, but resource allocation efficiency is insufficient and interference occurs
Solution Approach 1:
The patent performs preliminary channel sensing and resource selection before actual transmission. The UE identifies available resources in advance by sensing the channel during a selection window, determining channel occupancy time, and selecting transmission resources before data transmission occurs. This preliminary action prevents interference by ensuring selected resources are currently idle.
Solution Approach 2:
The patent enables UEs to autonomously perform channel sensing, resource selection, and transmission without base station intervention. The UE independently determines channel occupancy time, selects transmission resources from the resource pool, and executes transmission. This self-service mechanism improves resource allocation efficiency while reducing base station overhead.
2Reliability
If multi-slot based transmission is implemented, then communication reliability is improved, but resource selection complexity increases
Solution Approach 1:
The patent segments the resource pool into multiple slots and divides the transmission into multi-slot segments. The UE determines channel occupancy time for each slot and selects resources on a per-slot basis within the selection window. This segmentation approach improves reliability through diverse resource selection while managing complexity by processing one slot at a time.
Solution Approach 2:
The patent implements dynamic resource selection where the UE adjusts channel occupancy time determination and resource selection based on real-time channel conditions sensed during the selection window. The selection process adapts to changing channel states across multiple slots, improving reliability while using systematic procedures to manage complexity.
Data Source
AI summary
Provided are a method for a first device to perform wireless communication and a device supporting same. The method may comprise the steps of: acquiring configuration information related to a resource pool; triggering resource selection; determining a selection window on the basis of the resource selection being triggered; determining at least one candidate value for the number of slots for multi-slot based transmission on the basis of a channel occupancy time (COT) duration; selecting an N value on the basis of the at least one candidate value; and determining a candidate multi-slot resource in the resource pool in the selection window on the basis of the N value.