Terminal Device Timing Advance Acquisition for Cell Switching
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Solution Overview
Problem
Current wireless communication systems lack effective methods for timing adjustments, especially in mobility scenarios, leading to inefficiencies and increased energy consumption due to the inability to efficiently maintain downlink timing during cell switching.
Innovation Solution
A terminal device performs timing advance acquisition on target cells and adjusts downlink timing using a timer, allowing for efficient control and energy savings by monitoring and maintaining downlink timing, thereby improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device continuously monitors and adjusts downlink timing for target cells during cell switching, then timing accuracy is improved, but processing complexity and energy consumption increase
Solution Approach 1:
The patent applies dynamics by making the timing adjustment process conditional and adaptive rather than static and continuous. The terminal device dynamically adjusts downlink timing only when a timer is running and cell switching is detected, rather than continuously monitoring all cells. This dynamic approach maintains timing accuracy when needed while reducing processing complexity when cell switching is not occurring.
Solution Approach 2:
The patent implements preliminary action by pre-configuring the timer mechanism and timing adjustment parameters before cell switching occurs. The network device provides configuration information for the timer in advance, and the terminal device prepares the timing adjustment capability beforehand, so that when cell switching is detected, the adjustment can be made immediately without complex real-time processing.
2Measurement precision
If the terminal device continuously monitors and adjusts downlink timing for target cells during cell switching, then timing accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies periodic action through the use of a timer that runs for specific durations rather than continuous monitoring. The terminal device adjusts downlink timing periodically when the timer is running, rather than continuously. This periodic approach ensures timing accuracy is maintained during critical periods while reducing energy consumption during non-critical periods when the timer is not running.
3Productivity
If the terminal device performs timing advance acquisition on target cells for cell switching, then communication efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent extracts the timing adjustment function from the general cell switching process by implementing it as a separate, conditional operation triggered only when specific conditions are met (timer running, cell switching detected). This extraction allows the terminal device to perform timing advance acquisition independently rather than as part of every cell switching operation, reducing overall processing complexity while maintaining communication efficiency when needed.
Data Source
Figure 1A
Figure 1B~1C
Figure 2
AI summary
Embodiments of the present disclosure relate to timing adjustment. A terminal device performs timing advance (TA) acquisition on at least one target cell for cell switching from a serving cell for the terminal device to one of the at least one target cell. Then, the terminal device adjusts downlink timing of the at least one target cell, when a timer is running at the terminal device. As a result, it is allowed to efficiently control downlink timing maintenance burden at the terminal device.