Coordinated Cell Selection Using Disabled Neighboring Cells
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Solution Overview
Problem
In next-generation mobile communications systems, determining a coordinated cell to improve terminal performance at the cell edge is challenging due to cell reference signal collisions and inconsistent physical downlink control channel symbols, which hinders the achievement of high system efficiency and spectrum efficiency requirements.
Innovation Solution
A method for determining a coordinated cell by identifying a cell in a disabled state among neighboring cells, which does not send broadcast messages, thereby avoiding conflicts and allowing for higher signal gain during coordinated transmission, using measurement reports and neighboring relationship tables to accurately determine cell status and select the coordinated cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a coordinated cell is randomly selected from neighboring cells, then the terminal can be quickly connected to the network, but cell reference signal collisions and inconsistent physical downlink control channel symbols occur, reducing signal gain
Solution Approach 1:
The network device performs preliminary detection of neighboring cells before selecting a coordinated cell. It checks whether neighboring cells are in a disabled state (not sending broadcast messages) in advance, so that when a coordinated cell is selected, there is no reference signal collision or PDCCH symbol inconsistency, ensuring high signal gain from the start.
2Loss of information
If enabled cells are selected as coordinated cells, then the terminal can receive broadcast messages and system information, but reference signal collisions and PDCCH symbol inconsistencies occur, reducing coordinated transmission efficiency
Solution Approach 1:
Instead of selecting enabled cells as coordinated cells, the invention inverts the approach by selecting disabled cells (cells that do not send broadcast messages) as coordinated cells. This inversion avoids reference signal collisions and PDCCH symbol inconsistencies, thereby improving coordinated transmission efficiency while the serving cell continues to provide broadcast messages and system information.
3Measurement precision
If the network device detects and measures all neighboring cells, then the most suitable coordinated cell can be selected, but detection and measurement overhead increases significantly
Solution Approach 1:
The invention extracts and identifies disabled cells from the set of neighboring cells through specific detection methods (checking for absence of broadcast messages or using pre-configured neighboring relationship tables). By taking out disabled cells as the coordinated cell selection target, the system avoids the need to comprehensively detect and measure all neighboring cells, significantly reducing detection overhead while ensuring accurate selection.
Data Source
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AI summary
Embodiments of this application provide a coordinated cell determining method and a network device. The method includes: determining, by a first network device, a cell in a disabled state in a plurality of cells that are covered by a second network device, where the first network device is adjacent to the second network device; and determining, by the first network device, the cell in the disabled state as a coordinated cell.