Transmitter-Directed Wireless Security Format Selection
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Solution Overview
Problem
Wireless communication systems face challenges in providing simultaneous protection against jamming and geolocation threats due to the complexity of synchronization requirements in traditional spread spectrum techniques, which are often cumbersome and inflexible, and lack adaptability to varying conditions.
Innovation Solution
A transmitter-directed transmission security method that dynamically selects the transmission format for each data frame based on a transmission security scenario, using techniques such as frequency hopping, direct sequence spreading, permutation of modulation and coding formats, and other parameters on a packet-by-packet basis, allowing for adaptation to changing conditions and threats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional spread spectrum techniques are used to protect against jamming, then transmission security is improved, but device complexity and synchronization requirements increase
Solution Approach 1:
The patent implements dynamic selection of transmission formats (spread spectrum, non-spread spectrum, modulation schemes, coding rates) based on real-time security scenario assessments. The transmitter dynamically adapts its transmission characteristics rather than using fixed spread spectrum techniques, reducing synchronization complexity while maintaining security.
Solution Approach 2:
The system changes transmission parameters (spreading factor, modulation type, coding rate, frequency hopping pattern) based on the security scenario. When jamming threats are detected, spread spectrum parameters are adjusted; when geolocation threats are present, non-spread spectrum modes may be selected, thereby adapting security measures to specific threats without constant high-complexity synchronization.
2Reliability
If spread spectrum encoding is used to provide transmission security, then protection against interception is improved, but adaptability to varying conditions decreases
Solution Approach 1:
The transmission format selector dynamically chooses between spread spectrum and non-spread spectrum modes, and adjusts modulation and coding parameters based on channel conditions, data priority, and security requirements. This enables the system to adapt to varying conditions while maintaining protection against interception when needed.
Solution Approach 2:
The system incorporates multiple transmission modes (spread spectrum, frequency hopping, direct sequence, OFDM, single-carrier) within a single transmitter framework. This multi-functional capability allows the system to provide protection against interception through spread spectrum when required, while also adapting to other conditions using alternative modes, thereby achieving both security and adaptability.
3Device complexity
If predefined fixed keys are used in spread spectrum systems, then key distribution complexity is reduced, but vulnerability to key disclosure increases
Solution Approach 1:
The transmitter generates and manages its own transmission format selections and security parameters based on assessed security scenarios. Rather than relying on pre-distributed keys that must be kept secret, the system self-determines its transmission characteristics, reducing key distribution complexity while maintaining security through dynamic adaptation rather than static key secrecy.
4Measurement precision
If synchronization sources and preamble sequences are added to spread spectrum systems, then synchronization accuracy is improved, but device complexity increases
Solution Approach 1:
The system dynamically selects between spread spectrum and non-spread spectrum transmission modes. When non-spread spectrum modes are selected, simplified synchronization mechanisms can be used, reducing the need for complex synchronization sources and preamble sequences while maintaining adequate synchronization accuracy for the selected mode.
Data Source
AI summary
Transmitter-directed transmission security is provided between a transmit node and a receive node. The transmit node selects transmission format for each data frame based on a transmission security scenario. Information related to the transmission format is communicated between the transmit node and the receive node, and the data frames are transmitted over a wireless communication link using the selected transmission formats.