Sidelink SSB Mapping Order for V2X Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting Vehicle-to-Everything (V2X) communication, particularly in achieving low latency and high reliability for safety-critical messages like Basic Safety Messages (BSM), Cooperative Awareness Messages (CAM), and Decentralized Environmental Notification Messages (DENM), especially in scenarios such as vehicle platooning, advanced driving, and remote driving, where precise and timely data exchange is essential.
Innovation Solution
The proposed method involves a wireless communication system that utilizes sidelink (SL) communication, specifically by receiving a Secondary Sidelink Synchronization Signal (SL SSB) and obtaining bit information based on the mapping order of first and second m-sequences to primary and secondary SPS symbols, enabling efficient SL communication and synchronization in V2X scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sidelink communication is used for V2X data exchange, then communication capacity and direct link efficiency are improved, but synchronization precision and reliability for safety-critical messages deteriorate
Solution Approach 1:
The synchronization signal block (SSB) is segmented into multiple parts including primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH). This segmentation allows each component to be optimized independently for its specific function while collectively achieving both high productivity and reliability in V2X communication
Solution Approach 2:
The patent introduces frequency domain resource allocation for SSB transmission in addition to time domain resources. By allocating specific frequency resources for synchronization signals, the system achieves reliable synchronization without compromising communication capacity, resolving the contradiction between productivity and reliability
2Measurement precision
If synchronization signals are transmitted frequently to improve precision, then synchronization reliability is improved, but communication latency increases
Solution Approach 1:
The patent implements periodic transmission of synchronization signal blocks (SSBs) at optimized intervals. This periodic action ensures that vehicles receive synchronization updates regularly enough to maintain precision without excessive frequency that would increase latency, achieving a balance between synchronization precision and communication latency
Solution Approach 2:
Synchronization signals are transmitted in advance before data communication occurs. By establishing synchronization beforehand through pre-configured SSB transmissions, the system eliminates the need for real-time synchronization negotiations, thereby reducing communication latency while maintaining precision
3Productivity
If direct sidelink communication is established between vehicles, then communication efficiency is improved, but system complexity for resource management increases
Solution Approach 1:
The patent implements autonomous resource selection and synchronization procedures where vehicles independently perform synchronization signal detection, resource selection, and communication setup without centralized coordination. This self-service approach maintains high communication efficiency while reducing the operational complexity each vehicle must manage
Solution Approach 2:
The synchronization signal block (SSB) structure is designed to serve multiple functions simultaneously: synchronization, channel estimation, and resource indication. This multi-functionality reduces the number of separate signaling mechanisms needed, thereby reducing overall system complexity while maintaining communication efficiency
Data Source
AI summary
An operating method of a first device (100) in a wireless communication system is presented. The method can comprise the steps of receiving an SL SSB from a second device, and acquiring bit information on the basis of the order in which a first m-sequence and a second m-sequence are mapped to a first PSS symbol and a second PSS symbol.