Cell Identification Notification for CoMP Resource Efficiency
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Solution Overview
Problem
In mobile communication systems implementing CoMP or CA technologies, signaling delays between base stations can render communication using multiple cells set by multiple base stations impossible, leading to inefficient use of radio resources and increased processing loads due to unnecessary cell radio strength and quality measurements.
Innovation Solution
A mobile communication system where a base station notifies a mobile station of identification information for cells that can be used for CoMP or CA communication and instructs the mobile station to measure signal power only on specified frequency bands, with the mobile station reporting only matching cells for addition, thereby optimizing resource utilization and reducing processing loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station notifies the mobile station of identification information about cells set by neighboring base stations, then the mobile station can perform cell search and measurement, but radio resources are wasted and processing loads increase when the measured cells cannot be added due to base station coordination limitations
Solution Approach 1:
The base station performs preliminary determination of which cells can be added before notifying the mobile station. The base station identifies cells that meet addition conditions (signal strength, quality, coordination availability) and includes only these in the notification to the mobile station. This preliminary filtering prevents the mobile station from measuring and reporting on cells that would ultimately be rejected, thereby avoiding waste of radio resources and reducing processing loads.
2Measurement precision
If the mobile station measures cell radio strength and quality for all notified cells, then complete measurement data is obtained, but processing loads and radio resource usage increase
Solution Approach 1:
The base station performs preliminary filtering of cells that meet addition conditions before notifying the mobile station. This ensures the mobile station only measures cells that have a genuine chance of being added, maintaining measurement effectiveness while improving resource efficiency.
3Adaptability or versatility
If cells from multiple base stations are used for CoMP or CA communication, then communication coverage is expanded, but signaling delays make communication impossible
Solution Approach 1:
The system segments cells into groups based on their base station affiliation. The base station identifies and notifies only those cells that belong to its own set of cells, ensuring that CoMP or CA operations are performed within a single base station's coordination domain. This segmentation eliminates cross-base-station signaling delays while maintaining the ability to use multiple cells for enhanced communication.
Data Source
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AI summary
A mobile communication system including a base station which sets a plurality of cells and a mobile station is provided. In the mobile communication system, the base station notifies the mobile station in communication through a first cell among the plurality of cells, of the identification information of at least one cell among the plurality of cells, which can be used for communication with the mobile station and instructs the mobile station to measure a reception state of radio signals. The mobile station detects, in response to the instruction from the base station, a cell for transmitting radio signals which the mobile station is able to receive, and when identification information of the detected cell matches any of the identification information of the at least one cell, the mobile station notifies the base station of the identification information of the detected cell.