Wireless Communication System Secure Key Distribution
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Solution Overview
Problem
Wireless communication systems face challenges in maintaining secure communication due to variations in radio wave propagation characteristics, which affect the accurate measurement and sharing of encryption keys between transmitters and receivers.
Innovation Solution
A wireless communication system that includes a transmitter and receiver with measurement units to assess radio wave environments, control units to determine and transmit parameters for distributed coding of bit sequences, and decoding units to decode received information, ensuring secure communication even when radio wave propagation characteristics vary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption keys are created based on radio wave propagation characteristics, then secure communication is achieved, but measurement accuracy deteriorates when radio wave characteristics vary
Solution Approach 1:
The patent introduces measurement periods as an intermediary mechanism to separate the measurement of radio wave propagation characteristics from the actual communication process. During these dedicated measurement periods, the system captures channel state information without the interference of active data transmission, thereby improving measurement accuracy while maintaining communication security through the use of these measurements for encryption key generation
Solution Approach 2:
The system performs preliminary measurements of radio wave propagation characteristics during measurement periods before actual communication occurs. These advance measurements allow the system to establish accurate channel state information that can be used for generating encryption keys, ensuring both measurement precision and communication security are achieved
2Measurement precision
If measurement periods are set too long, then measurement accuracy improves, but communication efficiency deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of measurement period lengths based on communication requirements and channel conditions. The measurement periods are configured adaptively rather than being fixed, allowing the system to optimize the balance between measurement accuracy and communication efficiency by adjusting the duration and frequency of measurement periods according to actual operational needs
Solution Approach 2:
The system changes the parameters of measurement periods (duration, frequency, timing) to optimize both measurement precision and communication efficiency. By adjusting these parameters dynamically, the system can achieve accurate radio wave environment measurements without excessively reducing communication productivity
Data Source
AI summary
A transmitter includes a first measurement unit configured to measure a radio wave environment between the transmitter and a receiver for an individual wireless resource, a transmission control unit configured to determine the wireless resource and a parameter on a basis of the measurement result of the radio wave environment, an encoder unit configured to perform distributed coding of the bit sequence on a basis of the parameter, and a transmission unit configured to transmit information representing the determined wireless resource and the distributed coded bit sequence, by using the determined wireless resource. The receiver includes a second measurement unit configured to measure the radio wave environment for the individual wireless resource, a reception control unit configured to estimate the parameter on a basis of the measurement result of the radio wave environment, a reception unit configured to receive the information representing the determined wireless resource and the distributed coded bit sequence, by using the determined wireless resource, and a decoder unit configured to decode the received bit sequence on a basis of the parameter.