Wireless Base Station Interference Coordination
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Solution Overview
Problem
Current W-CDMA systems face interference issues due to independent power control and handover processes in wireless base stations, leading to degradation in system throughput and capacity across adjacent cells, without a comprehensive solution to optimize these degradations network-wide.
Innovation Solution
A wireless base station capable of communicating with adjacent stations to share wireless environment information, enabling handover and transmission power control, interference determination, and traffic management, thereby optimizing resource utilization and reducing interference between cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If independent power control is performed for each mobile terminal by each wireless base station, then transmission power control can be implemented for each terminal, but interference with adjacent cells increases and system throughput degrades
Solution Approach 1:
The patent merges the power control operations of multiple adjacent wireless base stations into a coordinated control system. The control section of each base station collaborates with adjacent base stations to jointly determine transmission power levels, transforming independent control into coordinated control. This merging approach allows the system to maintain individual terminal control capabilities while reducing overall interference through collaborative decision-making.
Solution Approach 2:
The patent implements a feedback mechanism where each wireless base station notifies adjacent base stations of its determined transmission power levels. This feedback loop enables adjacent base stations to adjust their own power control strategies accordingly, creating a responsive coordinated system that dynamically adapts to changing interference conditions while maintaining ease of operation.
2Ease of operation
If independent handover control is performed by each wireless base station, then handover management can be implemented for each terminal, but network-wide optimization is not achieved and system capacity is limited
Solution Approach 1:
The patent merges handover control operations across multiple wireless base stations by having the control section of each base station communicate and coordinate with adjacent base stations. This coordinated handover control combines the individual control capabilities of each base station into a unified network-wide handover management system, enabling optimal handover decisions that consider overall system capacity rather than just individual base station performance.
3Device complexity
If wireless base stations do not exchange information, then device complexity is reduced, but interference coordination fails and network capacity is degraded
Solution Approach 1:
The patent introduces an information exchange mechanism as an intermediary between wireless base stations. The control section of each base station acts as an intermediary that collects, processes, and shares transmission power information and handover status with adjacent base stations. This intermediary information exchange enables interference coordination without requiring complex direct communication infrastructure, achieving interference reduction through structured information sharing.
Data Source
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AI summary
Information on each wireless environment of an adjacent cell is exchanged between adjacent wireless base station in a mobile communication system, where the system enables a plurality of wireless base stations to communicate with each other by using a link between the base stations. Then, the latest information of the information on the wireless environments is stored in a memory at each wireless base station. Each wireless base station performs handover control, transmission power control, traffic control by referencing the memory storage information. That enables usage efficiency of wireless resources to be improved and a communication quality at end users to be improved as a whole of the system.