Timing Advance Control in Wireless Communication Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in providing stable communication due to inadequate timing advance control, especially in integrated access and backhaul (IAB) systems, which affect the reliability and latency of next-generation radio access technologies like NR.
Innovation Solution
A method is introduced where an initial access operation is performed with another apparatus, transmitting first and second information multiple times, with each information related to timing adjustment, and using a timing advance (TA) value based on the average of all transmitted information to align timing for finer control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional timing advance control is used in IAB systems, then device complexity is reduced, but timing alignment precision deteriorates leading to unstable communication
Solution Approach 1:
The patent segments the timing advance adjustment process into multiple measurement phases (initial access, random access, and fine-tuning stages). Each phase uses different information transmission strategies, with the final stage employing multiple repeated transmissions of timing adjustment information to achieve fine-grained TA control without overwhelming system complexity
Solution Approach 2:
The patent performs preliminary timing advance measurements during initial access and random access procedures before implementing the fine-tuned TA control. This preliminary action establishes a baseline TA value that is then refined through subsequent multiple transmissions of timing adjustment information, reducing the complexity of real-time precise control
2Measurement precision
If multiple timing adjustment information transmissions are performed, then timing advance control precision is improved, but loss of time increases due to multiple transmissions
Solution Approach 1:
The patent implements periodic transmissions of timing adjustment information at strategically chosen intervals rather than continuous transmissions. The multiple transmissions are spaced to allow for accumulation of TA values without causing excessive delay, balancing precision requirements with time efficiency
Solution Approach 2:
The patent uses copied timing adjustment information from preliminary measurement stages to reduce the need for extensive new measurements. Previously obtained timing information is reused and refined through fewer additional transmissions, minimizing time loss while maintaining precision
3Stability of the object's composition
If average-based TA calculation is used, then communication stability is improved, but reliability of timing synchronization deteriorates in dynamic conditions
Solution Approach 1:
The patent implements a dynamic TA adjustment mechanism where the averaging process adapts to changing channel conditions. The system transitions from initial coarse measurements to refined adjustments based on observed timing variations, allowing the averaging window and weighting factors to be adjusted dynamically rather than using fixed averaging parameters
Solution Approach 2:
The patent incorporates feedback loops where the results of multiple timing adjustment information transmissions are fed back into the TA calculation process. This feedback mechanism allows the system to detect and correct deviations from the average TA value, maintaining synchronization reliability even when channel conditions change dynamically
Data Source
AI summary
The present specification relates to a method by which a device performs data transmission or reception in a wireless communication system, comprising: performing an initial access operation with other devices; and transmitting first information (M−N) times and second information N times to the other devices, wherein M and N are respectively natural numbers, M is greater than N, and the first information and the second information are respectively the information related to timing adjustment, the first information has a value differing from that of the second information, and the data transmission or reception with the other devices is performed on the basis of a timing advance (TA) value, which is based on the average of all of the first information transmitted (M−N) times and the second information transmitted N times.