Cell Cancellation List and Adaptive RLF Trigger for Spectrum Sharing
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Solution Overview
Problem
Current wireless communication systems, particularly LTE, face challenges in managing interference and congested networks due to increasing demand for mobile broadband access, which affects spectrum sharing and radio link failure triggers.
Innovation Solution
Implementing a cell cancellation method that detects interference and cancels signals from cells indicated in a cancellation list, along with an adaptive radio link failure trigger that adjusts based on the cell identity of interferers, to improve spectrum sharing and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If more UEs access the long-range wireless communication networks and more short-range wireless systems are deployed, then mobile broadband access capacity increases, but interference and network congestion increase
Solution Approach 1:
The patent converts harmful interference from short-range wireless systems into a benefit by implementing interference cancellation techniques. The receiver identifies interference signals from neighboring cells and actively cancels them, transforming the harmful effect into an opportunity to improve signal quality and enable more aggressive spectrum sharing.
Solution Approach 2:
The patent dynamically adjusts radio link failure triggers based on detected interference conditions. When interference from specific cells is detected, the system modifies the RLF trigger parameters adaptively, allowing the network to maintain connectivity under interference conditions while still protecting against genuine failures.
2Object-affected harmful factors
If cell cancellation is implemented to reduce interference, then spectrum sharing improves, but device complexity increases due to cancellation list management
Solution Approach 1:
The system implements self-service through autonomous interference detection and cancellation list management. The receiver automatically detects interfering cells, identifies their identifiers, and maintains the cancellation list without requiring manual configuration or complex external control, reducing overall system complexity.
Solution Approach 2:
The patent employs feedback mechanisms where the receiver continuously monitors for interference, detects cell identifiers from interfering signals, and updates the cancellation list accordingly. This closed-loop feedback system automatically adapts to changing interference conditions without increasing operational complexity.
3Reliability
If adaptive radio link failure trigger is used to reduce false declarations, then network stability improves, but processing requirements increase
Solution Approach 1:
The patent applies partial action by selectively adjusting RLF triggers only for specific interfering cells identified in the cancellation list, rather than applying uniform adjustments across all cells. This targeted approach reduces processing requirements compared to comprehensive interference management while still improving reliability.
Data Source
AI summary
A cell cancellation method for improved spectrum sharing is provided. The cell cancellation method includes detecting interference from a cell. The method also includes cancelling a signal from the cell when a physical cell identifier corresponding to the cell is indicated in a cancellation list. An adaptive radio link failure (RLF) trigger method for improved spectrum sharing is disclosed. The RLF trigger method includes detecting interference from a cell. The RLF trigger method also includes adjusting a radio link failure trigger according to a cell identity of an interferer associated with the cell.