Baseband Processor Reset for Cell Selection in Wireless Devices
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Solution Overview
Problem
User equipment (UE) may become stuck camping on a cell that provides no service or limited service due to inability to synchronize with the current cell and fail to meet criteria for cell reselection, preventing it from switching to a better service provider.
Innovation Solution
The UE initiates cell selection by deactivating and then reactivating its baseband processor to allow for the selection of an alternative cell that meets initial cell selection criteria, even if the current cell does not satisfy reselection criteria, enabling the UE to camp on a cell that provides improved service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE follows conventional cell reselection procedures and waits for predetermined criteria to be met, then the UE maintains stable operation on the current cell, but the UE remains stuck on a cell that provides no service or limited service
Solution Approach 1:
The UE performs preliminary actions by deactivating and then reactivating the baseband processor to reset the cell selection state, allowing the UE to initiate a new cell selection procedure even when conventional reselection criteria are not met. This preliminary reset action enables the UE to escape from a non-serviceable cell before attempting to camp on a new cell.
Solution Approach 2:
The invention changes the operational state of the baseband processor from active to inactive and back to active, thereby changing the cell selection parameters. By reactivating the baseband processor, the UE resets its cell selection state and can evaluate cells based on initial cell selection criteria rather than being constrained by conventional reselection criteria.
2Reliability
If the UE deactivates and reactivates the baseband processor to initiate cell selection, then the UE can camp on an alternative cell with better service, but the UE experiences interruption in communication functionality during the deactivation and reactivation process
Solution Approach 1:
The UE checks whether alternative cells satisfy initial cell selection criteria before deactivating the baseband processor. This preliminary verification ensures that the baseband processor will be reactivated with a valid target cell available, minimizing the duration of service interruption and preventing unnecessary deactivation cycles.
3Productivity
If the UE continuously monitors for cell reselection opportunities while camped on a non-serviceable cell, then the UE maintains the ability to switch cells when criteria are met, but the UE wastes time and resources on a cell that provides no service
Solution Approach 1:
The UE performs preliminary evaluation of alternative cells by checking if they satisfy initial cell selection criteria before initiating baseband processor deactivation. This preliminary check enables the UE to quickly identify viable alternative cells and transition away from non-serviceable cells, improving cell switching efficiency by avoiding prolonged monitoring of unavailable cells.
Data Source
AI summary
A device, system and method for initiating cell selection. The method is performed at a device connected to a network and camped on a first cell of the network. The method includes determining whether the device has successfully synchronized with the first cell. When the device is unable to synchronize with the first cell, the method includes determining whether at least one further cell satisfies predetermined reselection criteria and determining whether the at least one further cell satisfies initial cell selection criteria. When the at least one further cell satisfies the initial cell selection criteria, the method includes initiating an initial cell selection.