Cell Camping Method Optimizing Power Consumption in LTE Terminals
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Solution Overview
Problem
In LTE networks, terminal devices perform unnecessary cell measurements when the quality of service reference value of the serving cell is below a certain threshold, leading to wasted power and performance issues, even if no cell handover is needed.
Innovation Solution
A terminal device method that selects the cell with the highest quality of service reference value and reports or does not report events based on a threshold, stopping unnecessary cell measurements by determining if the cell's quality of service reference value is below a configured threshold, thereby avoiding power consumption and ensuring service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs cell measurement when the quality of service reference value of the serving cell is below a threshold, then the terminal device can prepare for potential cell handover, but the terminal device wastes power and performance is affected when no handover is actually needed
Solution Approach 1:
The terminal device performs preliminary actions by selecting the cell with the highest quality of service reference value as the first cell for current camping before actually needing to perform handover. This preliminary selection allows the terminal device to have ready a candidate cell that meets the quality threshold, so when handover becomes necessary, the preparation is already in place without requiring continuous measurement and comparison of multiple cells.
Solution Approach 2:
The terminal device uses its own locally stored quality of service reference values for neighboring cells to determine whether cell measurement is necessary. By self-evaluating whether the highest quality cell meets the threshold requirement, the terminal device can independently decide whether to perform measurement without always triggering handover preparation, thus avoiding unnecessary power consumption while maintaining reliability when needed.
2Reliability
If the terminal device continuously monitors and measures neighboring cells, then the terminal device ensures service continuity, but the terminal device consumes excessive power and resources
Solution Approach 1:
Instead of continuously measuring all neighboring cells (excessive action), the terminal device performs partial measurement by only measuring and comparing cells that are likely to be suitable for handover. The terminal device uses locally stored quality of service reference values to pre-identify candidate cells, so when measurement is actually needed, it only measures the necessary cells to confirm handover eligibility, reducing overall power consumption while maintaining service continuity.
Solution Approach 2:
The terminal device changes the parameter of measurement trigger based on the quality of service reference value threshold. When the highest quality cell's reference value is above the threshold, the terminal device does not trigger continuous measurement. When the reference value drops below the threshold, the terminal device activates measurement and handover preparation. This parameter-based dynamic adjustment reduces power waste while ensuring service continuity when actually needed.
3Measurement precision
If the terminal device requests measurement gap and neighboring cell allocation from the network device, then the terminal device can perform comprehensive cell measurement, but the terminal device incurs additional overhead and delays
Solution Approach 1:
The terminal device performs preliminary identification of the best cell for camping based on locally stored quality of service reference values before actually needing to perform measurement. By pre-determining which cell has the highest quality reference value, the terminal device can later quickly verify whether this cell meets the handover threshold without needing to request comprehensive measurement resources from the network device, reducing setup time and overhead.
Data Source
AI summary
A cell camping method and a terminal device selects a first cell having a quality of service reference value highest among cells found by the terminal device for current camping. When a quality of service reference value of the first cell is less than a first threshold, the terminal device sends a first measuring report or determines not to send a second measuring report such that the terminal device avoids performing cell handover.