Sidelink Communication Resource Allocation in Unlicensed Spectrum
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Solution Overview
Problem
In unlicensed spectrum sidelink communication, the existing Frame-Based Equipment (FBE) channel access mode leads to low resource utilization due to all terminal devices contending for the same time domain unit, resulting in congestion and inefficient resource allocation.
Innovation Solution
A method and apparatus that determine a configuration for each terminal device to identify valid sidelink time domain units within a Frame Format Period (FFP), allowing devices to perform channel access at different time locations, thereby reducing contention and improving resource utilization through FBE staggering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all terminal devices contend for the same sidelink time domain unit at the start location of FFP, then channel access is simplified, but resource utilization of unlicensed spectrum deteriorates
Solution Approach 1:
The patent segments the single contention opportunity at FFP start location into multiple contention opportunities distributed across different time domain units within the FFP. Terminal devices can select from multiple valid sidelink time domain units (e.g., first, second, third units) rather than all contending for the same unit, thereby reducing congestion while maintaining operational simplicity through configured selection rules.
2Productivity
If multiple terminal devices perform channel access simultaneously at the same time domain location, then channel access efficiency is improved, but resource contention increases
Solution Approach 1:
The patent applies local quality by assigning different terminal devices to different valid sidelink time domain units within the FFP based on their identities or configurations. For example, first terminal devices may access the first time domain unit while second terminal devices access the second time domain unit, creating localized access patterns that reduce overall contention while maintaining high channel access efficiency.
Data Source
AI summary
Disclosed are a method and an apparatus for side communication. The method includes: determining, by a first terminal device, a first configuration corresponding to a first FFP, where the first FFP includes a plurality of sidelink time domain units, the first configuration is used to indicate a valid sidelink time domain unit in the plurality of sidelink time domain units.