Quantum Key Receiver Threshold Control for Processing Load
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Solution Overview
Problem
Existing quantum cryptographic communication systems face increased processing loads when receiving photons under heavy load conditions, leading to inefficiencies in cryptographic key distribution.
Innovation Solution
A receiver system that adjusts a threshold based on weather forecasts and load predictions to optimize cryptographic key generation, using a modulation unit, detection unit, extraction unit, acquisition unit, prediction unit, and adjustment unit to manage processing loads by adjusting the amplitude component threshold in response to weather and load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver receives a certain amount of photons transmitted from the transmission apparatus regardless of the load status, then the cryptographic key distribution can be maintained, but the processing load on the receiver increases when under heavy processing load conditions
Solution Approach 1:
The receiver dynamically adjusts the threshold for accepting photons based on its current processing load status. When the load is high, the threshold is raised to reject photons and reduce processing load. When the load is low, the threshold is lowered to accept more photons and maintain cryptographic key distribution. This dynamic adaptation resolves the contradiction by making the system responsive to changing conditions.
Solution Approach 2:
The system changes the threshold parameter based on the receiver's load status. By adjusting this critical parameter in real-time, the system can control the number of photons processed, thereby managing the processing load while maintaining reliable cryptographic key distribution under varying conditions.
2Productivity
If the receiver increases the threshold to reduce processing load, then the processing load decreases, but the number of photons accepted decreases
Solution Approach 1:
The threshold is not fixed but dynamically adjusted based on the receiver's processing load status. The system continuously monitors its load and adjusts the threshold accordingly, allowing it to accept more photons when load is low and reject photons when load is high, thus resolving the contradiction between processing load and photon acceptance quantity.
Solution Approach 2:
The system implements feedback by monitoring the receiver's processing load status and using this information to adjust the threshold. This closed-loop control ensures that the threshold adapts to actual system conditions, balancing the number of photons accepted with the processing capacity available.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively generates cryptographic keys without increasing processing loads by dynamically adjusting thresholds based on weather forecasts and load predictions, enhancing security and efficiency in quantum cryptographic communication.
Implementation Method 1
a first modulation unit configured to modulate a phase of a reference light by using a reception base randomly assigned so as to correspond to a transmission base that is randomly assigned to each of a plurality of weak lights transmitted from a transmitter
Implementation Method 2
a detection unit configured to cause the plurality of weak lights to be interfered with by the reference light the phase of which has been modulated by the first modulation unit, to thereby detect a plurality of pieces of bit information
Data Source
AI summary
A receiver according to the present disclosure includes: a first modulation unit that modulates a phase of a reference light by using a reception base assigned so as to correspond to a transmission base assigned to each of a plurality of weak lights; a detection unit that detects a plurality of pieces of bit information from each of the plurality of weak lights interfered with by the reference light in which a base value of the reception base matches that of the transmission base; an extraction unit that extracts a plurality of pieces of bit information each having an amplitude component equal to or greater than a threshold; a prediction unit configured to predict a load status of the receiver based on information about a weather forecast; and an adjustment unit that adjusts the threshold in accordance with the predicted load status of the receiver.