Multi-SIM Wireless Communication With Ping-Pong Reselection Control
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Solution Overview
Problem
Multi-SIM devices experience degraded communication performance due to cell reselection ping-pong and handover ping-pong, leading to reduced data throughput and excessive network resource consumption.
Innovation Solution
Implement a method for multi-SIM devices to perform neighbor cell signal measurement and reselection based on a neighbor cell measurement rule considering the measurement value of a serving cell signal and the number of cell reselection ping-pongs, using a processor to determine when to perform cell reselection based on specific criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell reselection is performed frequently to optimize network connection, then communication quality may be improved, but cell reselection ping-pong occurs causing data throughput degradation
Solution Approach 1:
The patent introduces a feedback mechanism by counting the number of times a cell has been reselected (ping-pong counter). When the counter exceeds a threshold, the UE stops performing cell reselection for that cell, using the feedback information to prevent infinite ping-pong loops and maintain data throughput while still allowing initial cell reselection optimizations.
Solution Approach 2:
The patent dynamically adjusts cell reselection behavior based on real-time conditions. The UE modifies its cell reselection parameters and thresholds dynamically to prevent ping-pong oscillations, changing from static cell reselection rules to adaptive rules that consider historical reselection data and current network conditions.
2Reliability
If cell reselection operation is performed to optimize network connection, then communication performance is improved, but network resources and battery power are excessively consumed
Solution Approach 1:
The patent uses feedback from cell reselection history (ping-pong counter) to determine whether to initiate new measurement and reselection procedures. When a cell shows signs of ping-pong behavior, the feedback mechanism suppresses further reselection attempts, reducing unnecessary energy consumption while maintaining communication performance through selective reselection.
Solution Approach 2:
The patent applies partial action by performing cell measurements and reselection only when necessary and beneficial, rather than continuously. The UE selectively conducts reselection operations based on network conditions and ping-pong history, avoiding excessive measurements and transitions that would waste battery power while still achieving adequate communication optimization.
3Measurement precision
If neighbor cell measurement is performed continuously to ensure optimal cell selection, then cell reselection accuracy is improved, but tune-away duration increases reducing data throughput
Solution Approach 1:
The patent performs preliminary cell measurements and evaluations before actual reselection occurs. By pre-measuring neighbor cells and preparing reselection candidates in advance, the UE can make faster reselection decisions when needed, reducing the tune-away duration while maintaining measurement precision through systematic preliminary assessment.
Solution Approach 2:
The patent uses feedback from previous measurement and reselection outcomes to optimize future measurements. The ping-pong counter and reselection history provide feedback that allows the UE to adjust measurement intensity and scope, performing precise measurements only when necessary and reducing unnecessary measurement time that would increase tune-away duration.
Data Source
AI summary
Provided are a user equipment (UE) supporting multi subscriber identity module (SIM) multi standby (MSMS), and an operating method of the UE. An operating method of a UE includes performing communication associated with a SIM of the UE with a network in a radio resource control (RRC) idle mode, triggering measurement of a neighbor cell based on a neighbor cell measurement rule that considers a measurement value of a serving cell signal and a number of cell reselection ping-pongs that occurred between the serving cell and the neighbor cell, and reselecting the neighbor cell based on at least one cell reselection criterion considering the measurement value and the number of cell reselection ping-pongs.