Base Station Cell Extension for Energy Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In mobile communication systems, when a base station intends to turn off a cell to conserve energy, user terminals connected to the closed mode cell may not be able to access adjacent cells with different CSG identifiers, leading to communication disruptions despite area compensation efforts.
Innovation Solution
A communication control method where the off-target base station requests cell extension from an adjacent base station managing a closed-mode cell, determining connectivity based on CSG identifiers and access rights, and selecting the base station that minimizes power consumption for cell extension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a cell is deactivated to save energy, then power consumption is reduced, but user terminals cannot connect to adjacent closed-mode cells, causing communication disruption
Solution Approach 1:
The system performs preliminary checks of CSG identifiers and access rights before deactivating a cell. The off target base station requests cell extension information from the extension target base station in advance, and the extension target base station determines user terminal connectivity based on CSG identifiers before allowing cell extension, preventing communication disruptions before they occur
Solution Approach 2:
The patent introduces an intermediary verification mechanism where the extension target base station acts as a mediator to check whether user terminals can connect to the extension target cell based on CSG identifiers and access rights. This intermediary check ensures that cell extension only occurs when connectivity is guaranteed, resolving the contradiction between energy saving and communication reliability
2Area of stationary object
If cell extension is performed without checking CSG identifiers, then area compensation is achieved, but user terminals with no access right cannot connect, causing communication failure
Solution Approach 1:
The system performs preliminary verification of CSG identifiers and access rights before executing cell extension. The extension target base station determines whether user terminals connected to the off target cell can connect to the extension target cell based on CSG identifier matching, ensuring that area compensation does not compromise access control
Solution Approach 2:
The off target base station requests cell extension information from the extension target base station, receiving feedback about CSG identifier compatibility and access rights. This feedback mechanism ensures that cell extension is only performed when it will not prevent user terminals from connecting, thereby maintaining both coverage area and access control reliability
Data Source
AI summary
A communication control method comprises: a step A of requesting, by an off target base station, an extension target base station that manages a second cell to which a closed mode in which only a user terminal having an access right is accessible is settable to perform the cell extension; and a step B of transmitting, by the extension target base station, a response to the request based on a determination result as to whether or not a user terminal connected to the first cell is connectable to the second cell, to the off target base station.