Time Synchronization Method for TSN with Propagation Delay Compensation
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving accurate time synchronization, particularly in Time Sensitive Networks (TSN), where propagation delays between user equipment (UE) and base stations can exceed requirements, leading to synchronization errors that impact orthogonality and reliability, especially in scenarios like industrial IoT and augmented/virtual reality applications.
Innovation Solution
A method for time synchronization in wireless communication systems involves receiving indication information about propagation delay and time granularity, allowing for precise adjustment of uplink transmission times based on this information to compensate for propagation delays, thereby enhancing synchronization accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If propagation delay compensation is not applied, then the system is simpler to operate, but time synchronization accuracy deteriorates to exceed 1 μs requirements
Solution Approach 1:
The base station performs preliminary calculation of propagation delay compensation values before time synchronization is needed. The UE stores these pre-calculated compensation values and applies them automatically during transmission, eliminating the need for real-time complex calculations at the UE side while achieving sub-1 μs synchronization accuracy.
Solution Approach 2:
The patent introduces propagation delay compensation values as an intermediary parameter that mediates between the UE and base station timing. This intermediary allows the UE to compensate for propagation delays without directly measuring or calculating them in real-time, simplifying the UE's processing while maintaining high synchronization accuracy.
2Reliability
If existing time synchronization methods are used, then the system is easier to implement, but synchronization errors impact orthogonality and reliability in TSN scenarios
Solution Approach 1:
The patent changes the timing parameter from simple timing advance to timing advance with propagation delay compensation. By introducing the propagation delay compensation value as an additional parameter, the system achieves sub-1 μs synchronization accuracy that guarantees signal orthogonality and reliability in TSN scenarios without fundamentally changing the existing implementation structure.
3Measurement precision
If propagation delay information is not provided to UE, then the system requires less information exchange, but time synchronization cannot meet sub-1 μs requirements
Solution Approach 1:
The base station performs preliminary calculation and storage of propagation delay compensation values. This pre-computed information is then efficiently transmitted to the UE without requiring complex real-time information exchange, achieving sub-1 μs synchronization accuracy with minimal information overhead.
Data Source
AI summary
Embodiments of the present application provide a time synchronization method, UE, base station, device, and computer readable storage medium, wherein the time synchronization method includes receiving indication information, the indication information being used to indicate propagation delay between the UE and a base station and/or time information of a time sensitive network (TSN); determining a time granularity of one bit of the indication information; and performing TSN time synchronization according to the indication information and the time granularity of one bit of the indication information. The present application achieves more accurate time synchronization of a time sensitive network (TSN).