Device-Controlled Cell Reselection for Call Quality
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Solution Overview
Problem
Mobile devices in wireless cellular communication networks often experience poor connection quality and call drops due to adherence to their home network, even when better signal quality is available from neighboring networks, as existing technologies prioritize network-defined criteria over device-based cell selection.
Innovation Solution
A mobile device configured to detect and switch to cells with better signal quality by maintaining and applying its own acceptability criteria for cell assignment, ensuring only cells meeting these criteria are considered for change, thereby avoiding poor service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile devices adhere to network-defined acceptability criteria for cell assignment, then network control and stability are maintained, but connection quality deteriorates when neighboring networks provide better signal
Solution Approach 1:
The patent implements dynamic acceptability criteria that can switch between network-defined criteria and device-maintained criteria based on operational mode. In connected mode, the device uses stricter device-maintained criteria to predictively select cells, while in idle mode it follows network-defined criteria. This dynamic adaptation resolves the contradiction by allowing device autonomy when connection quality is prioritized while maintaining network control during normal operations.
Solution Approach 2:
The device performs preliminary cell detection and evaluation using device-maintained acceptability criteria before actual cell assignment changes occur. By predictively identifying cells that meet stricter quality thresholds in advance, the device can proactively switch to better cells before connection quality deteriorates, resolving the contradiction between network control and connection quality.
2Reliability
If mobile devices use network-defined acceptability criteria for cell reselection, then network domain adherence is maintained, but call drops increase due to poor signal quality from current network cells
Solution Approach 1:
The device performs preliminary detection of neighboring cells using device-maintained acceptability criteria during connected mode. By identifying suitable target cells in advance that meet stricter quality thresholds, the device can execute predictive cell selection and switch to better cells before call drops occur, thereby maintaining connection continuity and reducing re-establishment time.
Solution Approach 2:
When the device detects that the current cell no longer meets device-maintained acceptability criteria, it can rapidly skip through the cell reselection process by directly selecting a pre-identified suitable cell from neighboring networks, bypassing lengthy PLMN scan procedures. This rushing through the reselection process minimizes call re-establishment time and prevents call drops.
3Reliability
If mobile devices apply stringent acceptability criteria for cell selection, then cell quality is improved, but device complexity increases due to dual criterion management
Solution Approach 1:
The patent segments the cell selection process into two distinct operational modes: connected mode and idle mode. In connected mode, the device applies device-maintained stricter acceptability criteria for predictive cell selection. In idle mode, it follows network-defined criteria. This segmentation allows the device to manage dual criterion sets systematically, reducing the perceived complexity by providing clear contextual guidance on which criteria to apply when.
Solution Approach 2:
The device dynamically activates or deactivates the application of device-maintained acceptability criteria based on operational mode. In connected mode, device-maintained criteria are activated for predictive cell selection. In idle mode, only network-defined criteria are applied. This dynamic activation reduces complexity by ensuring that the stricter device-maintained criteria are only applied when necessary for maintaining connection quality.
Data Source
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AI summary
The invention relates to a mobile device and a method for operation the mobile device configured to communicate within a wireless cellular communication network which device is assigned to a cell of said wireless cellular communication network and which is configured to initiate cell related procedures to potentially perform a change of the assigned cell in dependence of at least first predeterminable acceptability-criteria which are in particular set by the mobile device.