Cell Reselection History Ping-Pong Prevention
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Solution Overview
Problem
The ping-pong reselection phenomenon occurs due to improper network reselection parameters, leading to high standby current and negatively impacting terminal standby time and user experience.
Innovation Solution
A method for cell reselection that determines whether a neighboring cell meets reselection conditions, obtains cell reselection information, and checks if it matches a history ping-pong reselection record, reselecting the neighboring cell if the time difference is greater than a preset threshold to avoid frequent ping-pong reselections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cell reselection parameters are configured to enable frequent cell switching, then network adaptability is improved, but ping-pong reselection occurs causing high standby current and reduced terminal standby time
Solution Approach 1:
The patent applies preliminary action by recording historical cell reselection information before ping-pong reselection occurs. The terminal stores cell identity, reselection time, and reselection reason in a history record, enabling proactive detection and prevention of ping-pong reselection by comparing current reselection requests against historical data before execution
Solution Approach 2:
The patent implements feedback by continuously monitoring cell reselection events and comparing current reselection information against historical records. When a potential ping-pong reselection is detected through this feedback mechanism, the system adjusts reselection parameters or blocks the reselection, creating a closed-loop control that prevents harmful frequent switching while maintaining necessary network adaptability
2Use of energy by moving object
If cell reselection parameters are configured to prevent ping-pong reselection, then standby current is reduced, but network adaptability and cell switching responsiveness deteriorate
Solution Approach 1:
The patent applies local quality by differentiating between different types of cell reselection scenarios. Instead of applying a uniform restriction, the system analyzes the specific context of each reselection request by examining the history record, including cell identities, time intervals, and reselection reasons, allowing selective prevention only when ping-pong patterns are detected while permitting legitimate reselections
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting reselection parameters based on historical analysis. When ping-pong reselection is detected, the system modifies parameters such as reselection thresholds, time-to-trigger, or blocking duration, thereby adapting the reselection behavior to prevent harmful patterns while maintaining network adaptability for legitimate scenarios
3Adaptability or versatility
If cell reselection is performed frequently, then network coverage adaptability is improved, but terminal standby time is reduced due to high current consumption
Solution Approach 1:
The patent applies preliminary action by pre-recording cell reselection history including cell identity, reselection time, and reselection reason before ping-pong reselection occurs. This historical data is stored and used to proactively identify and prevent ping-pong patterns, reducing unnecessary frequent reselections that would otherwise extend battery consumption and reduce standby time
Solution Approach 2:
The patent implements feedback by continuously monitoring cell reselection events and comparing them against historical records. This feedback mechanism detects ping-pong patterns and triggers appropriate responses such as parameter adjustment or reselection blocking, thereby reducing unnecessary frequent switching that would increase current consumption and extend standby time
Data Source
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AI summary
The present disclosure relates to a method and device for cell reselection. The method includes: upon residing in a current serving cell, determining (S101) whether a neighboring cell meets a cell reselection condition; upon the neighboring cell meeting the cell reselection condition, obtaining (S102) cell reselection information corresponding to the neighboring cell; determining (S103) whether the cell reselection information matches a history ping-pong reselection record; upon the cell reselection information matching any one of history ping-pong reselection records, determining (S104) whether a time difference between the current cell reselection time and the history cell reselection time corresponding to the one history ping-pong reselection record is greater than a preset time difference; and upon the time difference being greater than the preset time difference, reselecting (S105) the neighboring cell as a current serving cell so as to reside in the neighboring cell.