Terminal RTT Propagation Delay Compensation
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Solution Overview
Problem
In the context of 5G NR communication systems, there is a challenge in effectively performing RTT-based propagation delay compensation due to issues with timing coordination between the terminal (UE) and the radio base station (gNB), particularly in exchanging and utilizing RTT-related information for accurate delay compensation.
Innovation Solution
The terminal and radio base station are equipped with units to acquire and manage time differences between signal transmission and reception timings, allowing for the transmission and reception of time difference information. This information is used to calculate and compensate for propagation delays based on Round-Trip Time (RTT), enabling precise synchronization and compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RTT-based propagation delay compensation is implemented, then synchronization precision is improved, but timing coordination complexity increases
Solution Approach 1:
The patent introduces a standardized information exchange mechanism that acts as an intermediary between the UE and gNB for RTT measurement coordination. The time difference information serves as a mediator that simplifies the timing coordination process while enabling precise propagation delay compensation through structured signal exchange and measurement procedures
Solution Approach 2:
The patent segments the RTT measurement process into distinct phases: signal transmission, signal reception, time difference calculation, and propagation delay compensation. This segmentation allows each component to be independently managed and coordinated, reducing overall timing coordination complexity while maintaining synchronization precision
2Productivity
If time difference information is transmitted when threshold is exceeded, then communication efficiency is improved, but information loss may occur
Solution Approach 1:
The patent dynamically changes the parameter of information transmission by comparing the time difference against a predefined threshold. When the threshold is exceeded, time difference information is transmitted; otherwise, transmission is deferred. This parameter-based decision mechanism improves communication efficiency by reducing unnecessary transmissions while ensuring critical timing information is communicated
Solution Approach 2:
The patent implements a feedback mechanism where the UE monitors time differences and provides feedback to the gNB when threshold conditions are met. This feedback loop ensures that significant time difference information is transmitted for propagation delay compensation while filtering out minor variations, balancing communication efficiency with information completeness
Data Source
AI summary
A terminal acquires a time difference between a transmission timing of a first signal and a reception timing of a second signal. When the time difference exceeds a defined threshold value, the terminal transmits time difference information indicating the time difference to a radio base station.