Cell Reselection Timing for Hard Cell Identity Change
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Solution Overview
Problem
The mobility of vehicle-mounted relays in cellular communication systems poses challenges for efficient cell reselection procedures, particularly in urban environments where vehicles act as mobile base stations, necessitating methods to manage the geographical movement of cells and ensure seamless connectivity for wireless terminals.
Innovation Solution
Wireless terminals and mobile base station relays are equipped with receiver and processor circuitry to handle cell identity change information, including a second cell's identity and activation time, enabling them to perform cell reselection procedures at the appropriate time, thereby adapting to the mobility of vehicle-mounted relays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If vehicle-mounted relays are deployed to provide mobile base station services, then coverage and connectivity in urban environments are improved, but cell reselection management becomes more complex due to geographical movement
Solution Approach 1:
The system performs preliminary actions by providing advance notification to the wireless terminal about upcoming cell identity changes and activation times. This allows the terminal to prepare for reselection before the actual change occurs, simplifying the management of mobile relay movements while maintaining seamless connectivity.
2Productivity
If cell identity change information is provided in advance, then cell reselection timing is optimized, but information management complexity increases
Solution Approach 1:
The patent extracts only the essential information needed for cell reselection - specifically the cell identity change information and activation time - and transmits this to the wireless terminal. This selective extraction of critical data optimizes reselection timing while avoiding the complexity of managing comprehensive cell management information.
3Reliability
If the wireless terminal performs cell reselection based on activation time, then connectivity during relay movement is maintained, but processing requirements increase
Solution Approach 1:
The system applies local quality by implementing time-specific processing - the wireless terminal processes cell identity change information at the specific activation time when it becomes relevant. This localized processing approach maintains connectivity during relay movement while minimizing overall processing requirements by avoiding continuous analysis.
Data Source
AI summary
A wireless terminal of a cellular telecommunication system communicates with a first cell served by a mobile base station relay. The wireless terminal comprises receiver circuitry and processor circuitry. The receiver circuitry is configured to receive, from the first cell, cell identity change information comprising: (1) second cell information including a cell identity of a second cell, and: (2) an activation time after which the second cell can be measured. The processor circuitry is configured to perform, based on the cell identity change information, a cell reselection procedure to reselect the second cell upon or after the activation time.