Satellite Measurement Window Synchronization via Delay Compensation
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Solution Overview
Problem
In satellite communication systems, the large timing delay in satellite service links causes measurement synchronization failures between terminal devices and target measurement cells due to mismatched measurement windows.
Innovation Solution
A method is introduced where network devices configure measurement gap parameters for terminal devices, including a measurement window, and send instruction information to adjust the window based on delay-related parameters between satellite service links, ensuring synchronization with neighboring cells by compensating for timing differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device measures the SSB according to the measurement window configured in the SMTC in the satellite communication system, then the measurement process follows the standard synchronization mechanism, but measurement synchronization of the terminal device with the target measurement cell may fail due to large timing delay in satellite service links
Solution Approach 1:
The patent changes the timing parameters of the measurement window by introducing delay compensation. The network device calculates the timing delay difference between satellite service links and adjusts the measurement window timing accordingly, transforming the fixed measurement window into a dynamically adjusted one that accounts for satellite propagation delays
Solution Approach 2:
The network device performs preliminary calculation and determination of the timing delay difference between satellite service links before the terminal device performs measurement. This advance preparation allows the terminal device to use pre-compensated measurement window timing, eliminating synchronization failures caused by unaccounted propagation delays
2Ease of manufacture
If the network device configures a fixed measurement window for the terminal device, then the configuration is simple and follows standard procedures, but the measurement window does not align with the actual time domain location of the SSB in satellite communication systems
Solution Approach 1:
The network device acts as an intermediary that calculates the timing delay difference between satellite service links and uses this information to adjust the measurement window configuration. This intermediary calculation layer bridges the gap between simple standard configuration and precise satellite-specific timing alignment
Solution Approach 2:
The measurement window timing transitions from a fixed static configuration to a dynamic adjusted configuration. The network device determines delay-related parameters and uses them to dynamically adjust the measurement window timing, allowing the system to adapt to satellite propagation characteristics while maintaining configuration simplicity
Data Source
AI summary
Disclosed are a measurement synchronization method, a network device and a terminal device. The method includes: determining delay-related parameters, wherein the delay-related parameters are used to represent a delay between a satellite service link corresponding to a serving cell and a satellite service link corresponding to a neighboring cell; adjusting a measurement window according to the delay-related parameters, wherein the measurement window is acquired from measurement interval parameters configured for a network device; and measuring a synchronization signal block corresponding to the neighboring cell according to the adjusted measurement window.