Home Base Station Adaptive Transmission Power Control
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently adjusting transmission power to balance coverage and interference, particularly in home base stations serving multiple access terminals with varying signal-to-interference-and-noise ratios, leading to suboptimal data throughput and increased interference between neighboring stations.
Innovation Solution
A home base station adapts its transmission power by building histograms of signal-to-interference-and-noise ratio data, calculating probability distribution functions, constructing a coverage failure probability function, and filtering it over time to determine whether to adjust power levels, ensuring optimal coverage and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If transmission power is increased to improve coverage, then coverage area is improved, but interference to neighboring stations increases
Solution Approach 1:
The patent implements dynamic transmission power adjustment by continuously monitoring SINR metrics from access terminals and adapting power levels in real-time. The base station transitions between different power states (normal, quiescent, off) based on current network conditions, ensuring coverage is maintained only when and where needed, thereby reducing unnecessary interference to neighboring cells.
Solution Approach 2:
The system changes the transmission power parameter adaptively based on SINR measurements and coverage failure probability calculations. By adjusting this key parameter dynamically rather than maintaining a fixed high power level, the system achieves adequate coverage while minimizing interference generation to surrounding stations.
2Object-generated harmful factors
If transmission power is decreased to reduce interference, then interference is reduced, but data throughput deteriorates
Solution Approach 1:
The patent employs feedback mechanisms where access terminals report SINR measurements to the base station, which then adjusts transmission power accordingly. This closed-loop control ensures that power is reduced only when SINR conditions permit, maintaining data throughput while minimizing interference. The system continuously monitors and responds to channel conditions to optimize the interference-throughput tradeoff.
Solution Approach 2:
The system dynamically adapts transmission power based on real-time SINR conditions rather than using a static power level. This allows the system to maintain high throughput when channel conditions are good while reducing power (and thus interference) when conditions are poor, optimizing both throughput and interference reduction across varying network conditions.
3Ease of operation
If fixed power level is used to simplify operation, then ease of operation is improved, but adaptability to varying wireless environments deteriorates
Solution Approach 1:
The base station performs self-adjustment of transmission power by automatically monitoring SINR metrics, calculating coverage failure probabilities, and adapting power levels without manual intervention. This self-service capability provides environmental adaptability while maintaining operational simplicity, as the system handles the complexity internally while presenting a straightforward operational interface.
Solution Approach 2:
The system implements dynamic power adjustment that automatically adapts to varying wireless environments through continuous SINR monitoring and probabilistic modeling. This dynamic behavior provides environmental versatility while maintaining ease of operation, as users do not need to manually configure power settings for different conditions - the system does so automatically.
4Reliability
If transmission power is increased to maintain coverage, then coverage reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring of SINR conditions and adaptive power adjustment, transitioning between normal operation, quiescent mode, and off state based on current needs. This periodic assessment and adjustment ensures coverage reliability is maintained only when necessary, reducing energy consumption during periods when full power is not needed while preserving reliability when required.
Solution Approach 2:
The system dynamically changes the transmission power parameter based on calculated coverage failure probabilities and monitored SINR conditions. By adjusting this parameter adaptively rather than maintaining a constantly high power level, the system maintains coverage reliability when needed while significantly reducing energy consumption during periods of low traffic or good channel conditions.
Data Source
AI summary
A home base station receives signal to interference and noise ratio data from at least one access terminal, determines whether a transmission power of the home base station should be adjusted based on the received signal to interference and noise ratio data, and then adaptively adjusts the transmission power of the home base station based on the received signal to interference and noise ratio data.