Sidelink Synchronization Block Transmission Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in the context of 5G, face challenges in efficiently transmitting sidelink synchronization blocks due to limitations in subcarrier spacing and resource block configurations, which affect latency and reliability in vehicular communication scenarios.
Innovation Solution
A method and apparatus for transmitting sidelink synchronization blocks in a wireless communication system, where the number of transmissions of the sidelink synchronization signal block is adjusted based on subcarrier spacing, with the total number of resource blocks varying accordingly, and the effective code rate of the physical sidelink broadcast channel is optimized to improve detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of transmissions of sidelink synchronization signal block is increased to improve reliability, then transmission reliability is improved, but transmission latency increases
Solution Approach 1:
The patent implements dynamic adjustment of the number of S-SSB transmissions based on subcarrier spacing configuration. When large subcarrier spacing (e.g., 60kHz or 120kHz) is used, the system transmits fewer S-SSB blocks (1 or 2 transmissions) because the larger spacing provides better time synchronization accuracy. When small subcarrier spacing (e.g., 15kHz or 30kHz) is used, the system transmits more S-SSB blocks to compensate for the lower time synchronization accuracy. This dynamic adaptation resolves the contradiction by optimizing the transmission count according to the specific subcarrier spacing configuration, achieving both low latency and high reliability.
2Productivity
If the total number of resource blocks is adjusted according to subcarrier spacing to optimize resource allocation, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent changes the parameter of total resource blocks based on subcarrier spacing configuration. For large subcarrier spacing (60kHz, 120kHz), the system allocates fewer total resource blocks for S-SSB transmission. For small subcarrier spacing (15kHz, 30kHz), the system allocates more total resource blocks. This parameter change approach optimizes resource allocation efficiency by matching resource block quantity to the time synchronization requirements of each subcarrier spacing, while avoiding the need for complex adaptive algorithms.
3Measurement precision
If effective code rate of physical sidelink broadcast channel is optimized to improve detection performance, then detection accuracy is improved, but transmission overhead increases
Solution Approach 1:
The patent applies different effective code rates to different subcarrier spacing configurations, creating local optimization. For large subcarrier spacing (60kHz, 120kHz) where time synchronization is more accurate, the system uses lower effective code rates (e.g., 1/3 or 1/2) which provide sufficient detection accuracy with less overhead. For small subcarrier spacing (15kHz, 30kHz) where time synchronization is less accurate, the system uses higher effective code rates (e.g., 2/3 or 3/4) to compensate and maintain detection accuracy. This local quality approach optimizes detection accuracy while minimizing transmission overhead for each specific configuration.
Data Source
AI summary
Disclosed is a method of performing an operation for a sidelink user equipment (UE) in a wireless communication system, including generating a sidelink synchronization signal block (S-SSB) including a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH); and transmitting the S-SSB, wherein the number of transmissions of the S-SSB within one period is differently set according to a subcarrier spacing.