Relief Carrier Tilt Optimization for Wireless Failure Areas
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Solution Overview
Problem
Existing methods for relieving communication failures in wireless networks due to base station failures are inefficient, often leading to insufficient relief carriers, prolonged calculation times, and reduced communication quality due to radio wave interference.
Innovation Solution
A control device that aggregates adjacent failure areas, selects relief carriers from surrounding base stations, and optimizes tilt angles simultaneously to improve coverage rates and reduce overlap, using an objective function that includes coverage rates and penalty terms for coverage area size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple failure areas are treated separately with individual relief carriers, then each area can be covered, but the calculation time increases and the number of relief carriers increases leading to radio wave interference
Solution Approach 1:
The patent aggregates multiple failure areas into a single aggregated failure area, and selects a shared set of relief carriers for all original failure areas. This merging approach reduces the total number of relief carriers needed and decreases calculation time while maintaining coverage of all failure areas through coordinated tilt angle optimization.
2Reliability
If more relief carriers are selected to cover failure areas, then coverage is improved, but radio wave interference increases and communication quality decreases
Solution Approach 1:
The patent optimizes the tilt angles of relief carriers as adjustable parameters to achieve effective coverage of failure areas while minimizing radio wave interference. By coordinating tilt angles across multiple relief carriers serving aggregated failure areas, the system reduces harmful interference compared to independent carrier selection.
3Productivity
If tilt angles are optimized for each relief carrier independently, then each carrier can be optimized, but the overall coordination is poor and interference increases
Solution Approach 1:
The patent employs an iterative optimization process that coordinates tilt angles across multiple relief carriers serving aggregated failure areas. The system evaluates overall coverage effectiveness and interference levels, adjusting tilt angles collectively to achieve better coordination and reduce radio wave interference compared to independent optimization.
Data Source
AI summary
A control apparatus determines a relief carrier that relieves communication in a specific area and a tilt angle of the relief carrier. The control apparatus includes a first processor; and a first memory that includes instructions, which when executed, cause the first processor to execute a first method. The first method includes: aggregating a plurality of areas to collectively generate a single aggregated area; selecting a plurality of relief carriers for the aggregated area; and optimizing a plurality of tilt angles in the plurality of relief carriers.