Sidelink Resource Determination in Unlicensed Bands
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Solution Overview
Problem
In sidelink transmission, determining suitable resources in unlicensed or shared bands is challenging due to the presence of other wireless technologies, requiring efficient methods to identify idle resources for channel access and ensure reliable communication.
Innovation Solution
A method and apparatus that determine N resource objects within L target time objects, including synchronization signal blocks and preset signals, to facilitate sidelink transmission in unlicensed bands by configuring candidate resources based on time domains and channel occupancy times, enhancing resource utilization and transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal monitors resources and attempts channel access in unlicensed band, then transmission opportunities increase, but transmission reliability deteriorates due to presence of other wireless technologies
Solution Approach 1:
The terminal performs listen-before-talk (LBT) procedure before channel access to detect channel occupancy by other wireless technologies. This preliminary action prevents collisions and interference, thereby maintaining transmission reliability while allowing multiple transmission opportunities in unlicensed bands
Solution Approach 2:
The terminal dynamically adjusts channel access parameters such as LBT delay timers and transmission power based on detected channel conditions. This dynamic adaptation enables the terminal to seize transmission opportunities when channel is idle while avoiding interference when other wireless technologies are active, thus resolving the contradiction between transmission opportunities and reliability
2Productivity
If terminal determines N resource objects within L target time objects, then resource utilization improves, but device complexity increases
Solution Approach 1:
The terminal divides the unlicensed band time resources into L target time objects (e.g., channel occupancy times or time windows), and within each target time object, identifies N resource objects (candidate resources) for specific signals. This segmentation transforms the complex resource selection problem into manageable discrete units, improving resource utilization while controlling device complexity through structured processing
Data Source
AI summary
A transmission processing method and apparatus, a terminal, and a readable storage medium. The transmission processing method in embodiments of this application includes: determining, by a terminal, N resource objects used for a first signal, where the first signal includes at least one of a synchronization signal block and a preset signal, where N is a positive integer, the N resource objects are located within L target time objects, L is a positive integer, the target time object includes a period, a timer, a time window, a transmission cluster, a preset time period, a channel occupancy time, or a time domain unit, and the resource object is a candidate resource or a candidate resource group.