Sidelink Resource Allocation in Unlicensed Bands
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Solution Overview
Problem
In 5G communication systems, particularly in sidelink communication, there is a need for efficient methods to configure and transmit sidelink broadcast information, especially in scenarios where vehicles (V2X) operate outside the coverage of traditional base stations, requiring advanced resource allocation and synchronization techniques to ensure reliable communication and high data rates.
Innovation Solution
The method involves transmitting a physical sidelink control channel (PSCCH) to allocate resources for a physical sidelink shared channel (PSSCH), with sub-channels defined by interlace blocks at regular intervals in the frequency domain, enabling efficient resource management and synchronization between vehicles, even when they are out of coverage of a traditional base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink broadcast information is transmitted using traditional resource allocation methods, then base station coverage is maintained, but communication reliability deteriorates in areas outside base station coverage
Solution Approach 1:
The patent enables user equipments (UEs) to autonomously allocate resources and transmit sidelink broadcast information without base station intervention. The transmitting UE independently selects resources from a pre-configured resource pool and performs transmissions, while receiving UEs autonomously decode and process the information. This self-service mechanism eliminates dependency on base station coverage and ensures reliable communication in out-of-coverage scenarios.
2Productivity
If interlace-based sub-channel definition is used, then resource allocation efficiency is improved, but frequency domain resource distribution complexity increases
Solution Approach 1:
The patent divides the available frequency resources into multiple interlace blocks, where each interlace block consists of regularly spaced subcarriers. This segmentation approach allows efficient resource allocation by enabling UEs to select specific interlace blocks for transmission, improving resource utilization while maintaining manageable complexity through structured organization of frequency resources.
3Productivity
If PSCCH is transmitted to allocate PSSCH resources, then resource management efficiency is improved, but control channel overhead increases
Solution Approach 1:
The patent employs a two-stage resource allocation approach where the PSCCH transmits preliminary resource allocation information that enables receiving UEs to directly access the corresponding PSSCH resources without requiring additional control signaling. This preliminary action reduces control channel overhead by embedding sufficient resource indication information in the initial PSCCH transmission, allowing efficient resource management with minimal ongoing control overhead.
Data Source
AI summary
The present disclosure relates to a communication technique for converging IoT technology with 5G communication systems for supporting a higher data transfer rate beyond 4G systems, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security-and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. In addition, the present disclosure relates to a method and a device for transmitting/receiving sidelink information in an unlicensed band.