Multi-Carrier Synchronization Signal Transmission in V2X Systems
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Solution Overview
Problem
In Vehicle-to-Everything systems, particularly in Rel-15, achieving time synchronization for multi-carrier transmission is challenging due to the need for a synchronization signal to be sent across multiple carriers, which existing technologies have not effectively addressed.
Innovation Solution
A method is provided where a terminal device determines a second carrier set from a first carrier set capable of providing synchronization reference signals and sends a synchronization signal on all carriers in the second set, enabling multi-carrier synchronous transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a synchronization signal is sent on multiple carriers to achieve time synchronization, then the spectral efficiency and transmission performance are improved, but the complexity of synchronization management and the difficulty of ensuring consistent timing across carriers increase
Solution Approach 1:
The patent segments the synchronization process by defining a specific carrier set for synchronization signal transmission, separating it from other data transmission carriers. This segmentation allows the system to manage synchronization independently on selected carriers while maintaining efficient data transmission on others, thus improving spectral efficiency without overwhelming synchronization management complexity.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the carrier set that will be used for synchronization signal transmission before actual communication occurs. The network device determines and configures which carriers belong to the synchronization carrier set in advance, enabling terminals to perform synchronous transmission without real-time coordination overhead, thereby simplifying synchronization management while maintaining high spectral efficiency.
2Loss of time
If time synchronization is implemented across multiple carriers, then the transmission delay is reduced, but the requirement for precise timing coordination and resource allocation increases
Solution Approach 1:
The patent merges the synchronization signal transmission with the multi-carrier data transmission framework by integrating synchronization carrier selection into the existing carrier aggregation structure. This merging allows the system to achieve time synchronization across multiple carriers used for data transmission without requiring separate dedicated synchronization carriers, thus reducing transmission delay while avoiding the complexity of independent synchronization timing coordination.
Solution Approach 2:
The patent enables self-service by allowing the network device to autonomously determine and configure the synchronization carrier set based on system conditions and requirements. The network device performs self-configuration of synchronization resources without requiring complex inter-carrier timing coordination protocols, thereby achieving precise timing synchronization while reducing the overall system complexity for timing coordination.
Data Source
AI summary
A method for sending a synchronization signal, a terminal device and a computer storage medium are provided. The method may include: determining a second carrier set based on a first carrier set, wherein the first carrier set includes carriers on which a synchronization reference signal can be provided; and sending a synchronization signal on all carriers in the second carrier set.