Wireless Device Cell Reselection Signal Reset Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, particularly for Machine-to-Machine (M2M) and Internet of Things (IoT) devices, frequent cell reselection procedures consume excessive energy and resources, as existing methods require continuous neighbor cell measurements even when no stronger neighbors are available, leading to unnecessary battery drain and signaling waste.
Innovation Solution
A method where a wireless device resets the strongest signal value after a certain time or number of failed reselection attempts, determining whether to measure a second signal based on the difference between the reset value and current signal strength, thereby reducing unnecessary neighbor cell measurements and conserving energy and resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous neighbor cell measurements are performed, then cell selection accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies partial action by performing neighbor cell measurements only when necessary - specifically when the serving cell signal falls below a threshold or after a certain number of failed reselection attempts. Instead of continuous measurements, the device selectively measures neighbor cells based on current signal conditions, reducing energy consumption while maintaining adequate cell selection accuracy.
Solution Approach 2:
The patent implements periodic action through time-based thresholds and retry counters that control when neighbor cell measurements occur. The measurement process is triggered periodically based on signal quality degradation or failed reselection events, rather than continuously, allowing the device to conserve energy while still detecting suitable cells when conditions warrant it.
2Reliability
If frequent cell reselection procedures are performed, then connection to optimal cell is improved, but resource consumption increases
Solution Approach 1:
The patent reduces resource consumption by performing only the necessary portion of cell reselection procedures. Instead of always executing full reselection sequences, the device selectively triggers measurements and reselection based on whether signal thresholds are met or retry counters indicate failure, avoiding wasteful resource expenditure on unnecessary procedures.
Solution Approach 2:
The patent changes the operational parameters of cell reselection by introducing dynamic thresholds for signal strength and retry counters for failed attempts. These parameter adjustments control the frequency and intensity of reselection procedures, allowing the system to adapt resource consumption based on actual network conditions and device needs.
3Reliability
If neighbor cell measurements are continuously performed, then cell reselection reliability is improved, but battery drain increases
Solution Approach 1:
The patent applies partial action by limiting neighbor cell measurements to specific conditions - when serving cell signal drops below threshold or after failed reselection attempts. This selective measurement approach maintains sufficient reselection reliability while avoiding continuous measurements that would drain the battery unnecessarily.
Solution Approach 2:
The patent implements periodic measurement triggers based on signal quality monitoring and retry counters. Instead of continuous measurement, the system periodically initiates neighbor cell measurements only when predefined conditions are met, reducing battery consumption while maintaining adequate reselection reliability through condition-based triggering.
Data Source
AI summary
A method by a wireless device (130) is described herein. The device (130), having determined that a measurement of a signal from a cell (121) is below a threshold, determines (301) that at least one of: i) a length of time since the device (130) last performed cell selection or reselection is above a second threshold, and ii) a number of times that neighbor cell measurements failed to trigger cell reselection is above a third threshold. Based on the determination, the device (130) resets (302) a strongest signal value of the signal measured after a last cell selection or reselection, to a lower value. The wireless device (130) determines (303) whether or not to measure another cell (122), based on whether or not a difference between: a) the reset value and b) a current measurement of the signal, is above a fourth threshold. The wireless device (130) then initiates (304) measuring the other cell (122) based on the determination.


