Wireless Terminal Synchronization via Specific Source Selection
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Solution Overview
Problem
Current sidelink synchronization methods in wireless communication systems, particularly in V2X communication, suffer from delays due to reliance on synchronization signals from GNSS, base stations, and other terminals, leading to inefficiencies in synchronization processes.
Innovation Solution
A method where user equipment (UE) receives synchronization information from specific UE, including type, ID, priority, and quality of the synchronization source, allowing it to perform synchronization based on better quality sources, even if they are not traditional synchronization signals, and transmit this information through robust channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization is adjusted using traditional synchronization signals from GNSS, base stations, and other terminals, then synchronization can be established, but delay time occurs within the corresponding period range
Solution Approach 1:
The patent applies preliminary action by having the transmitting terminal prepare and transmit synchronization information (including synchronization source ID, type, and quality) in advance through sidelink channels. This allows the receiving terminal to obtain synchronization data before traditional synchronization signal periods, reducing the synchronization delay while ensuring reliable synchronization establishment.
2Loss of information
If synchronization information is transmitted through traditional channels, then synchronization data can be shared, but transmission reliability may be insufficient in challenging radio environments
Solution Approach 1:
The patent uses sidelink control channels and sidelink shared channels as intermediary transmission paths for synchronization information. These dedicated sidelink channels provide more reliable transmission compared to traditional channels, ensuring that synchronization information (synchronization source ID, type, quality metrics) is accurately transmitted even in challenging radio environments.
3Reliability
If terminals rely on traditional synchronization sources (GNSS, base stations), then synchronization can be maintained, but sidelink operation efficiency is reduced
Solution Approach 1:
The patent enables terminals to perform self-service synchronization by allowing them to transmit and receive synchronization information directly through sidelink channels. Terminals can autonomously determine synchronization source quality and switch between different synchronization sources without relying on traditional centralized synchronization mechanisms, thereby improving sidelink operation efficiency while maintaining reliable synchronization.
4Reliability
If terminals use existing sidelink synchronization methods, then synchronization can be achieved, but synchronization delay occurs due to periodic synchronization signal transmission
Solution Approach 1:
The patent implements preliminary action by transmitting synchronization information including quality metrics in advance through sidelink channels. This allows receiving terminals to proactively identify and switch to better synchronization sources before delay occurs, achieving reliable synchronization while minimizing synchronization delay caused by periodic signal transmission.
Data Source
AI summary
Provided is a method for performing synchronization of a terminal in a wireless communication system. The method comprises: receiving synchronization information from a specific terminal, wherein the synchronization information informs a specific synchronization source; and performing synchronization, on the basis of the synchronization information, with the specific synchronization source, wherein the specific synchronization source is a synchronization source in a synchronization relationship with the specific terminal.