Transmitter Power Control via Spectrum Efficiency Gain and Loss
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Solution Overview
Problem
In wireless networks, determining transmitter power for a mobile station balances its link performance with interference to neighboring base stations, as increasing transmission power improves link performance but increases interference, leading to decreased performance in other mobile stations.
Innovation Solution
A method to determine transmitter power by measuring spectrum efficiency gain and loss, where the power level is incremented if the gain exceeds loss, using Open Loop Power Control (OLPC) or Closed Loop Power Control (CLPC) techniques, considering path loss and noise plus interference levels, to optimize power levels for mobile stations without significantly affecting neighboring base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power of a mobile station is increased, then link performance of the mobile station is improved, but interference to other mobile stations of neighboring base stations increases, resulting in decreased link performance of the other mobile stations
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the transmission power level of the mobile station based on calculated spectrum efficiency metrics. The system computes spectrum efficiency gain for the serving base station and spectrum efficiency loss for neighboring base stations, then determines an optimal power level that maximizes net spectrum efficiency. This involves changing the power parameter from a fixed or简单地 increased value to an optimized value derived from spectral efficiency calculations.
2Object-generated harmful factors
If transmission power is optimized to minimize interference, then interference to other base stations is reduced, but link performance of the mobile station may be compromised
Solution Approach 1:
The system changes the power parameter to an optimized value that balances both objectives. By calculating the difference between spectrum efficiency gain and loss, the system identifies a power level where the net benefit is maximized, ensuring neither link performance nor interference mitigation is significantly compromised.
Solution Approach 2:
The patent implements feedback by continuously monitoring spectrum efficiency metrics and adjusting transmission power accordingly. The base station receives information about interference levels and spectrum efficiency from neighboring base stations, processes this feedback information, and dynamically adjusts the mobile station's power level to achieve optimal performance while minimizing harmful interference.
Data Source
AI summary
Techniques are described that can be used to determine a transmitter power level of a mobile station based on spectrum efficiency gain and loss. Spectrum efficiency gain is measured for a home sector base station. Spectrum efficiency loss is measured for base stations other than the home sector base station. In one example, a base station transmits information such as noise plus interference level to a mobile station and the mobile station determines the transmitter power level. In another example, the mobile station transmits information such as preamble signal strength and preamble total signal strength to the home sector base station and the home sector base station determines the transmitter power level and instructs the mobile station to apply the determined transmitter power level.