TOA-Based Uplink Synchronization for High-Speed Timing Advance
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Solution Overview
Problem
In high-speed wireless communication scenarios, existing timing advance (TA) correction mechanisms require excessive downlink radio resources to maintain uplink synchronization due to rapidly changing relative speeds and unknown positions of base stations and user equipment, leading to inefficiencies and potential synchronization failures.
Innovation Solution
A time of arrival (TOA) based uplink channel synchronization mechanism that determines propagation delay and relative motion patterns between nodes, allowing for accurate timing advance corrections without additional signaling, using TOA data sets to predict and compensate for rapid changes in distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing timing advance correction mechanisms are used in high-speed scenarios, then uplink synchronization can be maintained, but excessive downlink radio resources are required and signaling overhead increases
Solution Approach 1:
The user equipment performs self-service by autonomously determining timing advance correction values based on TOA data sets and relative motion patterns, without requiring frequent network-provided corrections. This reduces downlink radio resource consumption while maintaining synchronization reliability.
Solution Approach 2:
The system performs preliminary action by pre-determining timing advance correction values using TOA data sets and predicted relative motion patterns before synchronization failures occur. This allows the UE to proactively adjust timing based on predicted position changes, reducing the need for reactive network signaling.
2Reliability
If frequent timing advance corrections are provided to maintain synchronization in high-speed scenarios, then connection quality is maintained, but signaling overhead and MAC CE updates increase
Solution Approach 1:
The system uses feedback by continuously monitoring TOA data sets and determining relative motion patterns between base station and user equipment. This feedback loop enables the UE to adaptively adjust timing advance values based on actual motion, maintaining connection quality while reducing unnecessary signaling compared to fixed-frequency correction approaches.
Solution Approach 2:
The system applies dynamics by making timing advance correction frequency adaptive rather than fixed. The UE dynamically adjusts correction timing based on detected relative motion patterns and TOA changes, providing frequent corrections only when motion patterns indicate synchronization risk, thereby reducing overall signaling overhead while maintaining connection quality.
3Measurement precision
If timing advance corrections are based on known position data, then accurate synchronization can be achieved, but user equipment position is revealed
Solution Approach 1:
The system extracts only the necessary timing information from TOA data sets without extracting or transmitting full position data. By separating timing advance correction functionality from explicit position revelation, the system achieves accurate synchronization while maintaining position privacy, as only timing differences not absolute positions are utilized.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and accurate uplink synchronization with reduced signaling overhead, maintaining connection quality even in high-speed scenarios without revealing the user equipment's position, thus reducing the need for frequent MAC CE updates.
Implementation Method 1
time of arrival (TOA) based correction and verification for uplink channel synchronization
Data Source
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AI summary
A method, apparatus, and a computer-readable storage medium are provided for time of arrival (TOA) based correction for uplink channel synchronization at a user equipment (UE). In an example implementation, the method may include determining a first time of arrival (TOA) index value; receiving, by the user equipment (UE), a first timing advance (TA) correction index value from a network node; and determining, by the user equipment (UE), a first time of arrival (TOA) correction value corresponding to the first timing advance (TA) correction index value. The example implementations may further include determining a first adjusted uplink timing value based at least on the first time of arrival (TOA) correction value and the first timing advance (TA) correction index value; and transmitting, by the user equipment (UE), first uplink data based at least on the first adjusted uplink timing value.