Frequency-Hopping Wireless Network Jamming Defense
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Solution Overview
Problem
Wireless communication systems are vulnerable to jamming interference due to power and bandwidth limitations, making them susceptible to intelligent jamming devices that can adapt to and disrupt frequency-hopping signals, leading to data connectivity losses in commercial and industrial applications.
Innovation Solution
Implementing a system with pseudo-random variable dwell times and aperiodic hop rates in frequency-hopping spread spectrum communications, combined with forward error correction and redundant data paths, to prevent jamming devices from synchronizing with the signal and ensure continuous data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is used to avoid jamming, then communication reliability is improved, but jamming devices can still synchronize and jam the signal effectively
Solution Approach 1:
The patent applies dynamics by making the dwell time variable rather than fixed. The system randomly selects dwell times from a predefined set of possible values, creating a dynamic transmission pattern that prevents jamming devices from synchronizing. This dynamic adjustment of the transmission parameters disrupts the jammer's ability to predict and jam the signal effectively.
Solution Approach 2:
The patent changes the parameter of dwell time from a fixed value to a variable value selected from multiple possible values. By varying this critical transmission parameter randomly, the system prevents jamming devices from adapting to a consistent pattern, thereby maintaining communication reliability while reducing jamming effectiveness.
2Reliability
If transmission power is increased to overcome jamming, then signal strength is improved, but power consumption and bandwidth usage increase
Solution Approach 1:
The patent changes the transmission parameter from fixed power level to variable power level by implementing variable dwell times. This allows the system to maintain adequate signal strength during transmission while reducing power consumption during non-transmission periods, optimizing the balance between signal strength and power usage.
Solution Approach 2:
The system uses periodic frequency hopping with variable dwell times, creating a rhythmic transmission pattern that alternates between active transmission and listening periods. This periodic action allows the system to maintain communication reliability while managing power consumption more efficiently compared to continuous high-power transmission.
3Object-affected harmful factors
If frequency hopping speed is increased to evade jamming, then jamming avoidance is improved, but synchronization and data transmission accuracy deteriorate
Solution Approach 1:
The patent applies dynamics by implementing variable dwell times that are selected randomly from a set of possible values. This dynamic approach allows the system to adjust the transmission rhythm adaptively, maintaining sufficient time for accurate synchronization and data transmission while still achieving effective jamming avoidance through unpredictable frequency hopping patterns.
Data Source
AI summary
A method of communicating over a network for wireless communications is disclosed. The method transmits encoded data from a source device to a destination device via a single path up through a plurality of wireless paths using a random frequency hopping tuning pattern for wireless communications, and pseudo-randomly varies dwell times of the frequency hopping tuning pattern over which the data is transmitted. The network uses forward-error correction coding redundancy within a data burst to allow recovery of corrupted data in any partially jammed hop of the transmitted data.