Base Station Power Control in Spectrum Sharing
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Solution Overview
Problem
In spectrum sharing systems, existing power control techniques fail to maximize communication efficiency while minimizing interference areas, particularly in regional cooperative schemes like e-Um 5G, leading to inefficient frequency use and increased interference.
Innovation Solution
A power control method that involves a control device setting initial power information for base stations, calculating coverage and interference areas, and updating power levels using a gradient descent algorithm to optimize power distribution and minimize interference, ensuring the interference sum remains below a target threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If base station power is increased to expand coverage area, then communication efficiency is improved, but interference area increases
Solution Approach 1:
The patent dynamically adjusts the power parameters of base stations based on real-time coverage and interference area calculations. By changing power levels as a variable parameter rather than maintaining fixed high power, the system achieves optimal balance between coverage expansion and interference control in spectrum sharing environments.
Solution Approach 2:
The patent implements a feedback mechanism where the control device continuously monitors coverage area and interference area metrics, then uses this information to adjust base station power settings. This closed-loop control ensures that power increases for coverage expansion automatically trigger corresponding interference management adjustments.
2Object-generated harmful factors
If base station power is decreased to minimize interference area, then interference is reduced, but coverage area shrinks
Solution Approach 1:
The patent employs dynamic parameter adjustment by modifying base station power levels based on calculated gradients of coverage and interference areas. Rather than using fixed low power settings, the system continuously optimizes power parameters to maintain adequate coverage while suppressing interference through precise control adjustments.
3Productivity
If traditional power control techniques are used in spectrum sharing, then implementation is simple, but communication efficiency is not maximized and interference areas increase
Solution Approach 1:
The patent replaces traditional mechanical or rule-based power control mechanisms with an intelligent optimization system that calculates coverage and interference areas and uses gradient-based optimization. This substitution of conventional control methods with computational optimization enables maximization of communication efficiency while minimizing interference areas through mathematically optimal power distribution.
Data Source
AI summary
Disclosed herein is a method of controlling power of a base station in a spectrum sharing environment, which includes setting, by a control device, predetermined initial power information for a plurality of base stations located in a service area in a time slot t; calculating, by the control device, a coverage radius for each of the base stations on the basis of the initial power information; calculating, by the control device, gradients of a coverage area and an interference area for each of the base stations on the basis of the coverage radius for each of the base stations; and updating, by the control device, power information for each of the base stations in a time slot t+1 on the basis of the gradients of each of the base stations.