Sidelink Resource Coordination Using Spatial Transmission Filters
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Solution Overview
Problem
In sidelink (SL) communications, existing methods for resource selection by terminal devices independently lead to inefficiencies and potential collisions due to autonomous resource selection without adequate coordination, particularly in high-frequency bands where beamforming is necessary.
Innovation Solution
A method for resource selection based on inter-terminal coordination, where terminal devices utilize spatial-domain transmission filters to determine and share resource sets, enhancing coordination and reducing collisions through shared resource information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices independently select resources through sensing, then resource selection autonomy is maintained, but resource collisions increase and communication reliability deteriorates
Solution Approach 1:
The patent introduces a network device as an intermediary that collects resource selection information from multiple terminal devices and coordinates resource allocation. This mediator resolves conflicts between autonomous resource selection and collision avoidance by centrally managing resource assignments while maintaining terminal device autonomy in the sense that they still perform sensing but under coordinated guidance.
Solution Approach 2:
The patent implements feedback mechanisms where terminal devices report resource selection information to the network device, which then provides coordination information back to the terminals. This closed-loop feedback system enables continuous optimization of resource allocation, reducing collisions while maintaining adaptability to changing channel conditions.
2Productivity
If terminal devices use autonomous sensing for resource selection, then device independence is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The patent merges autonomous sensing capabilities with network-coordinated resource allocation. Terminal devices continue to perform local sensing operations independently, but this is combined with centralized resource coordination from the network device, achieving both high resource utilization and operational simplicity.
Solution Approach 2:
The resource selection process is segmented into two parts: local sensing performed independently by each terminal device and centralized coordination performed by the network device. This segmentation allows each component to operate optimally - terminals maintain operational simplicity through autonomous sensing while the network optimizes overall resource utilization through coordinated allocation.
3Reliability
If inter-terminal coordination is implemented, then resource collisions are reduced, but system complexity increases
Solution Approach 1:
The network device serves as an intermediary that manages inter-terminal coordination, reducing the complexity burden from individual terminals. The mediator handles the complex tasks of collecting resource information from multiple terminals and computing coordinated allocations, while terminals only need to perform relatively simple sensing and reporting operations.
Solution Approach 2:
The feedback mechanism enables iterative optimization of resource allocation with reduced complexity. The network device receives resource selection information from terminals, computes coordinated allocations, and provides feedback to terminals for the next resource selection cycle. This feedback loop achieves effective collision avoidance while keeping individual terminal complexity manageable.
Data Source
AI summary
Provided is a method for resource selection based on inter-terminal coordination. The method is performed by a first terminal device, and includes: determining a resource set based on a spatial-domain transmission filter, and transmitting first information to a second terminal device, wherein the first information is used to indicate the resource set.