Sidelink Rate Matching and Resource Mapping for NR Terminals
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Solution Overview
Problem
Conventional technologies face challenges in properly performing rate matching and resource mapping in sidelink communication for New Radio (NR) systems, leading to reduced demodulation probability and communication efficiency.
Innovation Solution
A method and device for sidelink rate matching and resource mapping, where a terminal device calculates the length of coded bits carriable by a usable resource, excluding a target resource, and performs resource mapping based on a coded bit sequence output by rate matching, ensuring the length of the coded bit sequence is equal to the calculated length or its extension, to enhance demodulation success rate and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rate matching and resource mapping are not performed properly in sidelink communication, then the system can maintain simple conventional technology implementation, but the demodulation probability of sidelink data is reduced and communication efficiency deteriorates
Solution Approach 1:
The patent segments the resource mapping process into distinct phases: determining the set of resource elements, identifying target resource elements to be excluded, calculating the number of available resource elements, and performing rate matching based on these calculations. This segmentation allows each step to be handled systematically, improving demodulation reliability while maintaining manageable complexity through structured processing
Solution Approach 2:
The patent performs preliminary calculations before actual resource mapping by first determining the set of resource elements, then identifying which target resource elements should be excluded, and calculating the number of available resource elements in advance. This preliminary action ensures that rate matching is performed with accurate knowledge of available resources, thereby improving demodulation probability without adding operational complexity during transmission
2Productivity
If proper rate matching and resource mapping are implemented in sidelink communication, then demodulation probability and communication efficiency are improved, but the complexity of the system increases
Solution Approach 1:
The terminal device performs self-service by autonomously determining the set of resource elements, identifying target resource elements to exclude, calculating available resource element counts, and executing rate matching without requiring complex network coordination or external assistance. This self-service approach improves communication efficiency through accurate resource allocation while limiting complexity growth by keeping the sophisticated processing localized to individual devices
Solution Approach 2:
The patent changes key parameters systematically: it determines the total number of resource elements, identifies and excludes specific target resource elements, calculates the resulting number of available resource elements, and uses these parameter transformations to guide rate matching. These parameter changes enable efficient resource utilization and improved communication productivity while maintaining complexity through structured parameter management rather than unstructured complexity
Data Source
AI summary
Embodiments of this disclosure disclose a method for sidelink rate matching and resource mapping and a device, so as to provide a solution to rate matching and resource mapping for sidelink communication. The method is executed by a terminal device and includes: calculating, based on a resource size of a target resource, a length E of coded bits carriable by a usable resource with the target resource excluded; and performing resource mapping based on a coded bit sequence output by rate matching, where a length of the coded bit sequence is equal to E or equal to E+E′, and E′ is a length of coded bits carriable by the target resource.