Base Station Power Control Mapping for Reduced Overhead
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Solution Overview
Problem
Current communication systems face increased overhead and inefficiencies in power control due to the need for extensive channel quality feedback in closed-loop power control schemes, especially as the number of mobile stations increases, leading to higher communication system overhead and power control information transmission burdens.
Innovation Solution
A method and system where a base station receives channel information from multiple mobile stations, generates power control information, maps it according to channel allocation, and broadcasts it to the stations, allowing each mobile station to detect and apply the necessary power control information, thereby reducing overhead and enabling efficient power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If closed-loop power control schemes are used to accurately control transmission power, then power control accuracy is improved, but communication overhead increases due to extensive channel quality feedback requirements
Solution Approach 1:
The patent extracts only the essential power control information from the complete channel quality feedback, transmitting only the necessary power adjustment commands rather than full channel quality measurements. This reduces the feedback overhead while maintaining power control accuracy by sending only the critical control parameters needed at the base station.
Solution Approach 2:
Instead of having mobile stations send detailed channel quality information to the base station, the system inverts the approach by having the base station determine power control decisions based on compressed feedback or predetermined rules, thereby reducing the feedback burden while maintaining control accuracy through centralized decision-making.
2Productivity
If the number of mobile stations increases, then system capacity is improved, but power control information transmission burden increases
Solution Approach 1:
The patent merges power control information transmission with existing uplink data transmissions by embedding power control commands within uplink data frames. This allows power control information for multiple mobile stations to be transmitted efficiently alongside user data, reducing the overall transmission burden as system capacity increases.
Solution Approach 2:
The patent creates a universal power control information structure that can efficiently handle power control for any number of mobile stations using a standardized format. This multi-functional approach allows the same transmission mechanism to scale with system capacity without proportionally increasing information volume.
3Measurement precision
If detailed channel quality feedback is collected from all mobile stations, then power control accuracy is improved, but feedback channel overhead increases
Solution Approach 1:
The patent segments the feedback channel into multiple independent fields, each carrying specific power control information for different mobile stations or different measurement types. This segmentation allows selective transmission of only necessary feedback data, reducing overall feedback channel overhead while maintaining the ability to measure and control channel quality accurately for each segment.
Data Source
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AI summary
A method for controlling power in a communication system. The power control method in a base station includes receiving channel information from a plurality of mobile stations, and generating power control information of the mobile stations according to the received channel information; mapping the generated power control information to transmission fields of corresponding mobile stations according to allocation information of channels allocated to receive the channel information; and broadcasting to the mobile stations a message including the power control information mapped to the transmission fields of the corresponding mobile stations.