Wireless Time Synchronization Using TA Delay Compensation
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Solution Overview
Problem
Current 5G mobile communication technologies lack a specific solution to achieve the required 1 us time synchronization accuracy for Time Sensitive Networks (TSN) in services like factory automation and Electrical Power Distribution.
Innovation Solution
A wireless communication method involving first and second devices that utilize first time indication information to determine a delay compensation amount and/or Timing Advance (TA) value, ensuring clock synchronization accuracy by compensating for propagation delay through signaling exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional 5G communication methods are used, then general communication services can be provided, but time synchronization accuracy cannot meet the 1 us requirement for TSN services
Solution Approach 1:
The patent applies preliminary action by having the network device pre-calculate the delay compensation amount based on uplink and downlink time difference before actual TSN service transmission. This pre-computation allows the terminal device to directly apply the compensation without real-time calculation, achieving 1 us synchronization accuracy while avoiding complex real-time synchronization mechanisms.
Solution Approach 2:
The patent introduces a delay compensation amount as an intermediary parameter that mediates between the network device's time reference and the terminal device's transmission timing. This intermediary enables precise time synchronization without requiring direct complex coordination between network and terminal clocks, simplifying the overall synchronization mechanism.
2Measurement precision
If delay compensation is implemented to achieve clock synchronization, then time synchronization accuracy can be improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent extracts the delay compensation calculation function from the terminal device and assigns it to the network device. The network device calculates the delay compensation amount based on uplink and downlink time differences, then transmits this pre-calculated value to the terminal. This extraction reduces terminal complexity and minimizes signaling overhead by transmitting only the final compensation value rather than raw timing measurements.
Solution Approach 2:
The patent changes the parameter representation by converting raw time difference measurements into a pre-calculated delay compensation amount. This parameter transformation simplifies the information that needs to be signaled, as the network device processes multiple timing parameters (uplink time, downlink time, propagation delay) and outputs a single compensation value that the terminal can directly apply.
Data Source
AI summary
The embodiments of the present disclosure provide a wireless communication method, a first device, and a second device. The method includes: receiving, by a first device, first time indication information, the first time indication information being used to determine a first time length, and the first time length being used to determine a delay compensation amount and/or a Timing Advance (TA) value. In the embodiment of the present disclosure, the first device receives the first time indication information and determines the delay compensation amount and TA value based on the first time length determined from the first time indication information, so as to achieve clock synchronization and meet the synchronization accuracy requirement.