Dynamic Frequency Selection for Wireless Interference
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Solution Overview
Problem
Existing wireless networks face interference issues when operating in shared environments, leading to reduced communication quality and increased energy consumption due to frequent retransmissions caused by overlapping frequency bands.
Innovation Solution
A method for selecting operating frequency channels that involves detecting and identifying interfering networks, creating a frequency matrix to minimize interference by assigning non-overlapping frequencies, and dynamically adjusting frequency usage to avoid interference, thereby increasing communication density and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wireless networks operate in the same coverage area using the same frequency bands, then network coverage and communication density increase, but interference between networks increases and communication reliability deteriorates
Solution Approach 1:
The patent implements dynamic frequency selection where networks continuously monitor and adapt their operating frequencies based on real-time detection of other networks and interference conditions. This dynamic adjustment allows multiple networks to coexist by automatically avoiding frequency conflicts, thereby maintaining high communication density while ensuring reliable communication.
Solution Approach 2:
The system employs feedback mechanisms where each wireless network monitors the spectrum for other networks and interference, then uses this information to adjust its frequency selection. This feedback loop enables coordinated frequency usage across multiple networks, preventing interference while maintaining high communication density in shared environments.
2Reliability
If wireless networks use fixed frequency assignments to avoid interference, then communication reliability improves, but the number of available frequency channels decreases and communication density is limited
Solution Approach 1:
Instead of fixed frequency assignments, the patent enables networks to dynamically select and change frequencies based on current spectrum conditions. This dynamic approach allows the system to maintain reliable communication by avoiding interference while simultaneously increasing communication density by utilizing more frequency channels as conditions permit.
Solution Approach 2:
The system changes the operating frequency parameter adaptively based on detected interference conditions. By allowing frequency parameters to change dynamically rather than remaining fixed, the network can maintain reliability by avoiding conflicting frequencies while increasing overall communication density by accessing additional frequency resources when available.
3Object-affected harmful factors
If networks continuously monitor and adapt frequencies to avoid interference, then interference reduction improves, but system complexity and energy consumption increase
Solution Approach 1:
The patent implements preliminary frequency planning and monitoring where networks proactively detect and identify other wireless networks before interference occurs. By performing preliminary actions to establish frequency compatibility and monitor the spectrum in advance, the system reduces interference while minimizing the need for complex real-time adjustments and frequent retransmissions.
4Productivity
If networks use adaptive frequency selection to optimize their own throughput, then individual network performance improves, but overall system interference increases and other networks suffer
Solution Approach 1:
The patent merges the frequency selection objectives of multiple networks by implementing a coordinated approach where all networks use the same interference detection and avoidance mechanisms. This merging of strategies ensures that each network's throughput optimization does not come at the expense of others, as the collective frequency selection process inherently accounts for all networks in the environment.
Data Source
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AI summary
The present invention relates to a method for selecting operating frequency channels having frequency parameters, such as a frequency interval or at least one carrier frequency, for a network communicating data over a shared medium. The network is configured to communicate within a frequency range, and the frequency range is divided into a plurality of frequency channels f1-fn, each frequency channel defines a predetermined frequency parameter. The data to be communicated over the network is divided into sequences FS, each sequence having a plurality of positions SP1-SPm. The method further comprises regularly scanning the frequency range to identify interfering frequencies generated by interfering networks operating within said shared medium, and assigning a frequency channel fk to each position SPi within the sequences FS based on the identified interfering frequencies, whereby the use of interfering frequencies is limited.