Wireless Station Power Adjustment for Interference Control
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Solution Overview
Problem
In wireless communication systems, particularly in WLANs, accurate interference control between devices is challenging due to signal attenuation and deep-fading effects in wireless channels, making it difficult to detect collisions and manage transmission power effectively.
Innovation Solution
A method and apparatus for transmitting signals by adjusting transmission power based on actual transmission or reception power information received from other stations, using power differences or pathloss calculations to determine optimal transmission power levels, ensuring interference control and efficient medium sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to ensure reliable signal transmission, then signal reliability is improved, but interference to other wireless devices increases
Solution Approach 1:
The patent implements feedback mechanisms where stations report received power levels and transmission power information to each other. Based on this feedback, stations dynamically adjust their transmission power to maintain reliable communication while minimizing interference to others. The feedback loop enables continuous optimization of power levels based on actual channel conditions and interference impact.
Solution Approach 2:
The patent changes the transmission power parameter dynamically based on reported power levels from other stations. By adjusting this key parameter according to real-time conditions and power information exchange, the system achieves reliable transmission at minimal necessary power levels, reducing interference while maintaining communication quality.
2Object-generated harmful factors
If transmission power is decreased to reduce interference, then interference control is improved, but signal transmission reliability deteriorates
Solution Approach 1:
Stations receive feedback information including reported received power levels and transmission power from other stations. This feedback enables them to determine the minimum necessary transmission power to achieve reliable communication without excessive interference, optimizing the balance between reliability and interference control.
Solution Approach 2:
Before transmitting signals, stations perform power adjustment based on pre-exchanged power information with other stations. This preliminary power optimization ensures that transmission begins at the appropriate power level, avoiding both excessive interference and insufficient signal strength, thereby maintaining reliability while controlling interference from the outset.
3Object-generated harmful factors
If power information exchange is implemented for interference control, then interference management is improved, but communication protocol complexity increases
Solution Approach 1:
The patent integrates power information exchange into existing communication frames and protocols, allowing the same communication infrastructure to serve multiple functions: data transmission, acknowledgment, and power level coordination. This multi-functionality reduces the need for separate dedicated power management protocols, thereby limiting complexity increase while achieving effective interference control.
4Productivity
If dynamic power adjustment is performed based on power information, then resource utilization is improved, but processing requirements increase
Solution Approach 1:
The patent implements partial power adjustment based on power information exchange, where stations adjust power levels selectively rather than continuously optimizing. This partial action approach achieves improved resource utilization by adjusting power when necessary based on reported information, while avoiding the excessive processing requirements of continuous real-time optimization, thus balancing productivity gain with processing complexity.
Data Source
AI summary
The present document relates to a method for transmitting and receiving signals by controlling interference on other wireless devices based on actual transmitted power or received power information in a wireless communication system, and an apparatus therefor. To this end, STA 1 receives from STA 2 a frame comprising power information about actual transmitted power or actual received power of STA 2. Through the frame, STA 1 determines transmitted power by correcting the existing transmitted power of STA 1 by using the power information of STA 2 and, when the determined transmitted power of STA 1 is less than or equal to a reference value, transmits signals through the frame.