Sidelink Resource Mapping for Unlicensed Spectrum Access
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Solution Overview
Problem
Existing contention-based resource selection schemes for sidelink communication primarily focus on licensed and intelligent transport system spectra, neglecting the design for unlicensed spectra, which leads to inefficiencies in channel access and resource utilization.
Innovation Solution
A method for implementing a contention-based resource selection mechanism in sidelink scenarios by enabling a first communication entity to request and assist a second entity in determining a resource set, using assistance information that includes resource mapping modes, allowing for efficient selection of resources in the unlicensed spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a contention-based resource selection scheme is designed only for licensed and ITS spectra, then the existing resource allocation mechanism works for traditional scenarios, but it cannot effectively support unlicensed spectrum operations in sidelink communication
Solution Approach 1:
The patent segments the resource pool into multiple resource pools corresponding to different frequency domain units (FDUs), where each FDU contains multiple physical resource blocks (PRBs). This segmentation allows independent resource selection in each FDU, enabling adaptation to unlicensed spectrum requirements while maintaining structured resource management.
Solution Approach 2:
The patent introduces a new dimension of resource organization by mapping resources to frequency domain units (FDUs) rather than traditional resource blocks. This dimensional change enables the system to handle unlicensed spectrum characteristics by organizing resources in a hierarchy of FDUs containing PRBs, allowing flexible resource selection across different spectrum types.
2Ease of operation
If multiple channels are included in one resource pool for LBT contention, then channel access options increase, but resource selection complexity and contention management difficulty increase
Solution Approach 1:
The patent divides the resource pool into multiple frequency domain units (FDUs), each containing multiple PRBs. This segmentation allows the terminal to perform LBT contention and resource selection independently in each FDU, simplifying the management of multiple channels while increasing channel access efficiency through parallel opportunities.
Solution Approach 2:
The patent performs preliminary resource mapping by organizing PRBs into FDUs before resource selection. This preliminary structuring enables the terminal to efficiently perform LBT contention and select resources without complex real-time decision-making, reducing contention management difficulty while maintaining multiple channel options.
3Productivity
If resource mapping is not optimized for unlicensed spectrum, then licensed spectrum resource allocation can be maintained, but channel access efficiency and resource utilization deteriorate in unlicensed scenarios
Solution Approach 1:
The patent segments resources into frequency domain units (FDUs) with multiple PRBs each, enabling efficient resource utilization in unlicensed spectrum by allowing the terminal to select from multiple PRBs within an FDU. This segmentation reduces communication delay by providing more flexible resource options and improving channel access success rate.
Solution Approach 2:
The patent changes the resource mapping parameters by introducing FDU as a new organizational unit containing multiple PRBs. This parameter change optimizes resource allocation for unlicensed spectrum characteristics, improving resource utilization efficiency and reducing communication delay through better-suited resource granularity.
Data Source
AI summary
Provided are an information transmission method, a resource determination method, a resource selection method, a device, and a storage medium. The information transmission method applied by a first communication entity includes: sending request information to a second communication entity, where the request information is used for requesting the second communication entity to determine a resource set; and sending assistance information for determining the resource set to the second communication entity, where the assistance information includes at least one resource mapping mode, and the resource mapping mode at least includes one of the following: first frequency domain units to which a resource is mapped or the number of first frequency domain units to which a resource is mapped.