Macro Cell Synchronization Control for Small Cell Resource Management
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Solution Overview
Problem
In 4G communication systems, the use of new carrier types (NCTs) leads to resource consumption issues in macro cell base stations due to synchronization requirements, especially when a large number of UEs establish synchronization with macro cells and utilize synchronization results from small cells, causing resource overload.
Innovation Solution
A communication control device and method that synchronizes a first frequency band in a macro cell with a second frequency band in a small cell, transmitting synchronization signals in the first frequency band and preventing terminal devices from connecting to the first frequency band if they are synchronized with the second frequency band, thereby reducing resource consumption in the macro cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large number of UEs establish synchronization in a macro cell's frequency band by utilizing synchronization results from small cells, then synchronization efficiency is improved, but resource consumption (memory, radio, processing) in the macro cell base station increases
Solution Approach 1:
The patent extracts the synchronization function from the macro cell's resource management scope. By allowing UEs to establish synchronization with small cells independently and utilize synchronization results without requiring macro cell base station resources for connection management, the synchronization capability is separated from the macro cell's resource burden. This enables synchronization efficiency improvement while preventing resource consumption in the macro cell.
2Adaptability or versatility
If UEs are allowed to connect to the macro cell's first frequency band to utilize synchronization results, then adaptability is improved, but device complexity and resource management burden increase
Solution Approach 1:
The patent segments the frequency band usage into two independent parts: the first frequency band (macro cell) for synchronization signal transmission and the second frequency band (small cell) for data communication. This segmentation allows UEs to adaptively use synchronization from the macro cell while communicating through small cells, achieving frequency band adaptability without requiring the macro cell base station to manage connection resources for these UEs, thus reducing device complexity.
Data Source
AI summary
A communication control device including a communication control unit configured to control radio communication in a macro cell that overlaps with part or whole of a small cell. A first frequency band used for the radio communication in the macro cell is synchronized with a second frequency band used for radio communication in the small cell. A synchronization signal used for synchronization in the first frequency band is transmitted in the first frequency band. The communication control unit prevents a terminal device satisfying certain conditions from being connected in a radio resource in the first frequency band. The certain conditions include synchronization of the terminal device in the second frequency band utilizing a synchronization result by the synchronization signal.