Sidelink Resource Indication Mapping for Interlaced V2X Channels
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Solution Overview
Problem
In V2X communication, determining interlaced resources based on sidelink communication resource indication information is challenging when the resource pool is divided into interlaced resources, leading to issues like uneven power distribution and peak-to-average power ratio (PAPR) due to varying indexes of interlaced resources.
Innovation Solution
A method and apparatus that enable a terminal device to determine interlaced resources using a mapping relationship between sub-channels and interlaced resources, ensuring consistent indexing across resource block sets to maintain system compatibility and efficiency, thereby addressing uneven power distribution and PAPR issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the resource pool is divided into interlaced resources, then resource allocation flexibility is improved, but power distribution uniformity deteriorates
Solution Approach 1:
The patent applies local quality by making different parts of the resource pool have different characteristics. Specifically, it divides the resource pool into multiple resource block sets with different interlaced resource configurations, where each RB set can have tailored interlace patterns suited to local requirements, thus maintaining power distribution uniformity while preserving overall allocation flexibility.
Solution Approach 2:
The patent segments the resource pool into multiple resource block sets, where each RB set contains a specific number of resource blocks and interlaced resources. This segmentation allows independent configuration of interlaced resources in different segments, enabling flexible resource allocation while maintaining consistent power distribution characteristics within each segment.
2Adaptability or versatility
If the resource pool is divided into interlaced resources, then resource allocation flexibility is improved, but peak-to-average power ratio deteriorates
Solution Approach 1:
By configuring different interlaced resource patterns in different resource block sets, the patent ensures that power distribution characteristics are optimized locally in each RB set. This prevents excessive peak power in any single region while maintaining overall allocation flexibility across the entire resource pool.
Solution Approach 2:
The segmentation of the resource pool into multiple RB sets with controlled interlaced resource configurations helps distribute power more evenly across time and frequency. Each segment can be independently managed to avoid concentration of power peaks, thus reducing the overall peak-to-average power ratio while preserving allocation flexibility.
3Adaptability or versatility
If resource indication information indicates sub-channel, then resource indication compatibility is improved, but interlaced resource determination difficulty increases
Solution Approach 1:
The patent introduces resource block sets as an intermediary layer between sub-channel indication and interlaced resource determination. The resource indication information first identifies the relevant RB set, which then serves as a mediator to map the sub-channel indication to specific interlaced resources within that RB set, simplifying the overall determination process.
Solution Approach 2:
By segmenting the resource pool into resource block sets, the patent creates a hierarchical structure where resource indication operates at the RB set level first, then maps to interlaced resources within each set. This segmentation reduces the complexity of direct sub-channel to interlaced resource mapping, making determination easier while maintaining compatibility.
Data Source
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AI summary
A resource indication method and an apparatus are provided, and are applicable to the field of V2X, intelligent driving, the internet of vehicles, assisted driving, autonomous driving, and the like. The method includes: One resource block set includes NsubCH sub-channels, and one sub-channel includes k interlaced resources. A first terminal device receives first indication information from a second terminal device, where the first indication information indicates L sub-channels included in a first resource, and L is an integer greater than 0. The first terminal device determines, based on the L sub-channels, at least one interlaced resource included in the first resource, where the at least one interlaced resource and the L sub-channels meet a mapping relationship. According to the method in this application, although the first indication information indicates the sub-channel, the first terminal device may determine, based on the mapping relationship, an interlaced resource mapped to the sub-channel, so that data can be transmitted on the interlaced resource. An actually indicated resource can be determined based on the mapping relationship without changing a resource indication manner.