Wireless Communication C/I Feedback for Adaptive Power and Attenuation
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Solution Overview
Problem
Existing wireless communication systems fail to maintain desired communication quality when carrier and interference waves coexist, as they cannot adapt to independent interference wave generation by various devices without requiring interference wave stop requests.
Innovation Solution
A wireless communication system with a transmission station and a reception station equipped with an attenuator, which detects C/I ratio and adjusts transmission output and reception input to maintain desired communication quality by increasing transmission output and attenuating reception input as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reception station requests the transmission station to increase transmission output to improve C/I ratio, then communication quality is improved, but transmission power consumption increases and may cause interference to other systems
Solution Approach 1:
The reception station continuously monitors the C/I ratio of received signals and provides feedback to the transmission station. When the C/I ratio falls below a threshold, the reception station requests the transmission station to increase transmission output, creating a closed-loop control system that dynamically adjusts power based on actual communication conditions
Solution Approach 2:
The transmission output is made dynamically adjustable rather than fixed. The transmission station can change its output power level in response to requests from the reception station, allowing the system to adapt to varying interference conditions and minimize power consumption when high C/I ratio is already achieved
2Reliability
If the attenuator attenuates the reception input to reduce interference wave impact, then communication quality is improved, but the desired signal strength is reduced
Solution Approach 1:
The attenuator dynamically adjusts its attenuation rate based on the detected C/I ratio. When interference is detected (low C/I ratio), the attenuator increases attenuation to reduce interference wave impact. When C/I ratio is sufficient, attenuation is reduced or removed to maximize signal strength, creating a adaptive parameter adjustment system
3Adaptability or versatility
If the system operates in environments with independent interference wave generation by various devices, then system versatility is improved, but interference control becomes more difficult
Solution Approach 1:
The reception station autonomously detects interference conditions by monitoring the C/I ratio and independently controls both the attenuator and transmits requests to the transmission station. This self-service capability allows the system to adapt to various interference sources without requiring complex external coordination or mediation mechanisms
Solution Approach 2:
The C/I ratio detection mechanism serves as an intermediary that quantifies interference conditions. By converting complex interference scenarios into a simple metric (C/I ratio), the system can make automated decisions about attenuation and transmission power adjustments without requiring complex interference source identification or coordination with multiple independent devices
Data Source
AI summary
A transmission station that performs a variable transmission output and a reception station having a function of relaying a wireless signal are provided. The reception station includes an attenuator that attenuates a reception input captured from an antenna at a desired attenuation rate. A C/I that is an intensity ratio between a carrier wave C that is sent from the transmission station and reaches the antenna and an interference wave I that reaches the antenna is detected. In a case where the C/I of a reception input is smaller (for example, 30 dB) than a request value (for example, 35 dB), an increase in transmission output is requested to the transmission station, and attenuation of the reception input is requested to the attenuator to obtain an attenuation input that satisfies standards.