Sidelink Resource Indication for Flexible Subchannel Allocation
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Solution Overview
Problem
The existing frequency domain resource indication methods for sidelink unlicensed (SL-U) systems in NR Rel-16/17 are inflexible, leading to inefficient utilization of resources due to issues with subchannel numbering and resource availability.
Innovation Solution
A two-part indication method is introduced, where the first indication information includes subchannel information, and the second indication information provides additional frequency domain details, allowing for flexible resource allocation by indicating the starting location and number of subchannels, as well as the resource mapping and index numbering manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the existing frequency domain resource indication method based on consecutive subchannel indexes is used, then the resource allocation is simple, but the resource utilization efficiency deteriorates due to inflexibility
Solution Approach 1:
The frequency domain resource indication is segmented into two independent parts: first indication information (type, length, value) and second indication information (starting subchannel index). This segmentation allows each part to independently control different aspects of resource allocation, enabling flexible resource selection while maintaining simple indication mechanisms.
Solution Approach 2:
The resource allocation becomes dynamic through the two-part indication mechanism. The first indication information can indicate different resource types (consecutive or non-consecutive subchannels), and the second indication information provides the starting position. This dynamic structure adapts to different resource availability scenarios, improving utilization efficiency while keeping the indication method straightforward.
2Device complexity
If the existing resource indication method is used, then the indication structure is simple, but the adaptability deteriorates due to inability to flexibly allocate resources
Solution Approach 1:
The indication structure is divided into two independent fields: first indication information (occupying 3 bits with type, length, value components) and second indication information (starting subchannel index). This segmentation enables the system to indicate both consecutive and non-consecutive subchannel resources using the same simple structure, greatly improving adaptability without increasing overall complexity.
Solution Approach 2:
The first indication information uses parameter encoding (type indicating resource distribution pattern, length indicating number of subchannels, value indicating resource identifier) to convey multiple resource allocation modes within a compact 3-bit field. This parameter change approach allows flexible resource adaptation while maintaining simple indication structure.
Data Source
AI summary
Provided are a resource indication method, a first node, a second node, and a storage medium. The resource indication method is applied to the first node. The method includes determining first indication information of a physical transmission resource and second indication information of the physical transmission resource, where the first indication information includes subchannel information of a frequency domain of the physical transmission resource, and the second indication information includes other frequency domain indication information of the physical transmission resource other than the first indication information in the frequency domain; transmitting control information including the first indication information and the second indication information.