Wireless Device Dynamic CCA Threshold Adjustment
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in channel utilization and increased communication collisions due to outdated threshold settings in CSMA/CA and TPC technologies, leading to decreased transmission opportunities and potential disturbance of other communications.
Innovation Solution
The implementation of a wireless communication device that dynamically adjusts CCA_SD and CCA_ED threshold values based on transmission power, allowing for increased transmission opportunities while minimizing interference with other devices by ignoring signals from adjacent BSSs and optimizing channel access control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the emission of electric waves is stopped when a different wireless communication system is detected running, then crosstalk between wireless systems is avoided, but transmission opportunities decrease and communication efficiency deteriorates
Solution Approach 1:
The patent changes the parameter of CCA threshold values dynamically. Different CCA threshold values are set for intra-BSS and inter-BSS frames during the counting down process. When an inter-BSS frame is detected, a higher threshold is used, allowing the device to ignore weaker external signals and proceed with transmission, thereby increasing transmission opportunities while avoiding crosstalk with distant systems.
Solution Approach 2:
The patent applies different quality standards (threshold values) to different types of detected frames. Intra-BSS frames use one threshold standard while inter-BSS frames use another, more permissive standard. This local differentiation allows the system to be conservative about local interference while being more aggressive about external interference, resolving the contradiction between reliability and productivity.
2Reliability
If CCA threshold values are set to ensure reliable detection of all signals, then crosstalk is avoided, but transmission opportunities decrease due to excessive channel busy detection
Solution Approach 1:
The patent dynamically adjusts CCA threshold parameters based on the type of detected frame. For inter-BSS frames, a higher threshold is applied, meaning weaker signals are ignored. This allows the system to maintain reliable detection of strong local signals while ignoring weaker external signals that would otherwise cause unnecessary transmission delays.
Solution Approach 2:
The threshold values are not fixed but dynamic, changing based on the context of the detected signal. The system transitions between different threshold states depending on whether intra-BSS or inter-BSS frames are detected, allowing adaptive optimization of the reliability-productivity tradeoff in real-time.
3Ease of operation
If uniform CCA threshold values are used for all detected frames, then the system is simple to operate, but communication efficiency decreases due to inability to distinguish between local and external signals
Solution Approach 1:
The patent introduces local quality differentiation by applying different threshold standards to different frame types. The system automatically identifies whether a detected frame is intra-BSS or inter-BSS and applies the appropriate threshold, providing sophisticated performance without requiring complex manual configuration.
Solution Approach 2:
The system performs self-service by automatically determining the appropriate threshold based on the type of detected frame. No manual intervention is needed to configure different thresholds for different scenarios; the system autonomously selects the appropriate threshold value based on the detected signal type, maintaining ease of operation while improving productivity.
Data Source
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AI summary
[Object] To provide a mechanism capable of improving the efficiency of communication without disturbing other communication. [Solution] A wireless communication device includes: a reception unit that receives a signal; and a transmission unit that transmits a signal on a basis of a first threshold value set in association with a second threshold value. The first threshold value includes a detection level related to an electric wave in the wireless communication device, and the second threshold value includes a reception determination level of a signal detected by the wireless communication device, which is set on a basis of transmission power of the wireless communication device.