Secure Communication System Adaptive Frequency Hopping
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Solution Overview
Problem
Communication systems face challenges in maintaining secure and reliable wireless transmission in crowded spectra, particularly due to interference and jamming, where existing frequency hopping schedules become difficult to maintain with increasing sophisticated hacking and device additions.
Innovation Solution
A communication system incorporating a predictive modeling system that uses stochastic models and adaptive frequency hopping, combined with encryption and dynamic key management, to identify and utilize available spectrum holes and respond to interference, ensuring secure and reliable transmission by dynamically adjusting frequency schedules and encryption keys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping schedules are used for secure communication, then security against interference and jamming is improved, but the system becomes difficult to maintain as devices are added and hacking becomes more sophisticated
Solution Approach 1:
The patent implements dynamic frequency hopping schedules that automatically adapt to changing system conditions. The controller continuously monitors spectrum availability and adjusts frequency assignments in real-time, allowing the system to maintain security without manual intervention as devices are added or threats evolve.
Solution Approach 2:
The system performs self-configuration and self-maintenance through automated frequency schedule generation and updating. The controller autonomously manages frequency assignments across all devices without requiring external configuration, reducing maintenance complexity while preserving security.
2Reliability
If encryption is used for secure transmission, then communication security is improved, but key management becomes more complex
Solution Approach 1:
The patent combines frequency hopping and encryption into a unified security mechanism. The frequency schedule itself serves as part of the security key, merging two separate security functions into one integrated system that reduces overall key management complexity.
Solution Approach 2:
The frequency hopping schedule performs multiple functions simultaneously: it provides frequency diversity for interference mitigation, enables secure communication through predictable-only-to-authenticated-devices patterns, and serves as a synchronization mechanism. This multi-functionality reduces the number of separate keys and management systems needed.
3Productivity
If spectrum holes are dynamically identified and used, then productivity of spectrum utilization is improved, but measurement precision requirements increase
Solution Approach 1:
The controller performs preliminary spectrum analysis to predict future spectrum hole availability based on observed patterns. By anticipating when and where spectrum holes will occur, the system can prepare transmission schedules in advance, reducing the need for high-precision real-time measurement while maintaining high productivity.
Solution Approach 2:
The system continuously monitors actual spectrum conditions and compares them with predicted conditions, using this feedback to refine future predictions. This adaptive learning allows the system to improve measurement accuracy over time without increasing instantaneous measurement precision requirements.
Data Source
AI summary
A system having transmitters, receivers, transceivers, actuators, sensors, input/output rack, and/or a computer with application specific software and/or hardware, for secure communication and control. The system may use frequency hopping spread spectrum (FHSS) and encryption. Schedules for FHSS and encryption keys may be varied in variously elaborate ways. The system may utilize a distributed control system to manage the transmission and reception of signals, control operations, FHSS scheduling, changing of keys, and information.