Mobile Device Cell Selection Using Stored Neighbor Data
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Solution Overview
Problem
Current mobile devices in idle mode rely on network-broadcasted neighbor cell lists for radio cell selection, which often leads to incorrect configurations, causing devices to remain in low-priority radio access technologies despite the availability of higher-priority LTE cells, resulting in reduced data throughput.
Innovation Solution
Implementing a self-configured high-priority radio access technology search mechanism where the device stores and uses its own previously acquired cell information, reselection thresholds, and PLMN values to perform measurements and switch to preferred LTE cells when the network-provided list is inadequate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device relies on network-broadcasted neighbor cell lists for radio cell selection, then the device complexity is reduced and ease of operation is improved, but the reliability of cell selection deteriorates due to incorrect configurations
Solution Approach 1:
The device performs preliminary actions by storing cell information, reselection thresholds, and PLMN values in its memory before needing to make cell selection decisions. This preliminary storage of configuration data enables the device to independently perform cell measurements and reselection without relying on potentially incorrect network-broadcasted neighbor cell lists, thereby improving cell selection reliability while maintaining manageable device complexity through efficient use of stored parameters
2Productivity
If the device uses stored cell information for self-configured measurements, then the productivity (data throughput) is improved, but the device complexity increases due to additional measurement and evaluation functions
Solution Approach 1:
The device implements self-service by autonomously performing cell measurements, evaluations, and reselection decisions using its own stored cell information and reselection thresholds. The device independently determines whether to reselect to a different radio access technology based on measured signal qualities and stored parameters, without requiring continuous network control or complex real-time configuration management, thereby improving data throughput through reliable cell selection while keeping device complexity manageable through efficient self-directed operations
3Adaptability or versatility
If the device performs comprehensive inter-RAT cell measurements, then the adaptability to different radio access technologies is improved, but the loss of time for cell scanning increases
Solution Approach 1:
The device applies local quality by performing targeted cell measurements based on stored cell information and reselection thresholds specific to each radio access technology. Instead of uniformly scanning all possible frequencies and RATs, the device focuses measurements on relevant cells identified from stored configurations and current network conditions, enabling efficient evaluation of different RATs (GSM, UMTS, LTE) while minimizing unnecessary scanning time through selective, context-aware measurement procedures
Data Source
AI summary
This disclosure relates to a mobile device, comprising: a receiver configured to receive a radio signal comprising transmissions from a plurality of radio cells; and a processor configured to derive second information from the received radio signal, the second information indicating at least one neighboring radio cell, wherein the processor is configured to initiate a radio cell selection based on the second information if the second information indicates at least one neighboring radio cell configured for the first RAT.