Frequency Hopping Interference Avoidance via Sub-band Selection
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Solution Overview
Problem
Existing wireless communication systems in industries like entertainment, architectural, commercial, and industrial face challenges with crowded wireless transmission spaces, leading to unreliable communication, especially in environments requiring high reliability and real-time control, such as stage and concert lighting.
Innovation Solution
The method involves windowing signal contributions from a predefined frequency range into sub-bands, measuring average noise power, and selecting a subset of sub-bands for optimal communication, while also implementing adaptive frequency hopping to minimize latency and interference, using devices with receiver and transmitter modules to broadcast a frequency key to nodes within the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adaptive frequency hopping is implemented to avoid interference, then reliability of wireless transmission is improved, but device complexity increases due to the need for frequency measurement and selection mechanisms
Solution Approach 1:
The frequency range is divided into multiple sub-bands, allowing the system to measure and select from discrete frequency segments. This segmentation enables targeted frequency selection without requiring complex continuous analysis, thereby improving reliability while controlling complexity.
Solution Approach 2:
The system performs frequency measurements and selects suitable sub-bands before actual data transmission begins. By conducting frequency assessment in advance and establishing a frequency hopping sequence beforehand, the system avoids real-time decision complexity during critical transmission moments.
2Reliability
If frequency measurements are performed across the entire frequency range, then interference avoidance is improved, but loss of time increases due to extended measurement duration
Solution Approach 1:
By dividing the frequency range into sub-bands, the system can perform measurements on smaller frequency segments rather than the entire range at once. This reduces the time required for frequency assessment while still providing comprehensive interference avoidance across all bands.
Solution Approach 2:
The system measures frequency characteristics in a predefined set of sub-bands rather than continuously monitoring all possible frequencies. This partial measurement approach provides sufficient interference avoidance information without the time cost of exhaustive frequency scanning.
3Productivity
If a predefined set of sub-bands is used for transmission, then productivity is improved by reducing measurement time, but reliability worsens due to limited frequency options
Solution Approach 1:
The system dynamically determines a frequency hopping sequence based on measurements of the predefined sub-bands. This dynamic adaptation allows the system to optimize transmission within the constrained sub-band set, improving reliability through intelligent frequency selection even with limited options.
Solution Approach 2:
The system uses feedback from frequency measurements to adjust and optimize the frequency hopping sequence. By continuously monitoring transmission quality and interference levels within the predefined sub-bands, the system can adaptively select the best frequencies for ongoing transmissions, maintaining reliability despite the limited frequency set.
Data Source
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AI summary
The invention relates to a method for wireless communication in a wireless communication system, comprising receiving signal contributions from within a predefined frequency range, categorizing the received signal contributions in a plurality of different frequency bands being sub-bands of the predefined frequency range, comparing the content in each of the sub-bands with a predetermined criteria, selecting a sub-set of the plurality of sub-bands corresponding to the predetermined criteria, generating a frequency key comprising information as to the selected sub-set of sub-bands; and broadcasting the frequency key to a plurality of nodes of the wireless communication system. By means of the invention it is provided increased reliability in the transmission of wireless control data in a wireless communication system.