Light quantum communication networking structure based on quantum centralized control stations and communication method thereof

Abstract

The invention relates to a light quantum communication networking structure based on quantum centralized control stations. The structure comprises a plurality of quantum centralized control stations, wherein the quantum centralized control stations are connected with one or more optical switches through quantum channels, the optical switches hitch one or more first order users through the quantum channels. The quantum centralized control stations directly hitch one or more second order users through the quantum channels. The invention also discloses a communication method of a light quantum communication networking structure based on quantum centralized control stations. In the invention, a plurality of the quantum centralized control stations are used to form a plurality of network topology, which can raise flexibility and stability of the networking and can easily expand quantum communication network. Therefore, an area of the quantum communication network can be enlarged and communication distance can be substantially expanded. In addition, because quantities of the optical switches and interfaces of matrix optical switches are reduced, realization costs are relative low. Simultaneously, a structure that the optical switches hitch users is maintained so as to be suitable for the users with different security levels and different traffic demands.

Description

technical field [0001] The invention relates to the field of quantum communication, in particular to a quantum communication network structure and a communication method based on an optical quantum centralized control station. Background technique [0002] The application of quantum key distribution technology provides an unconditionally secure communication method. However, the real practical application of quantum key distribution technology must meet the needs of multi-user network communication. [0003] The traditional quantum communication networking scheme uses optical switches as the main nodes and forms a loop to realize multi-user quantum communication. With the increase in the number of users, the complexity of the network structure and the extension of the communication distance, the inherent loss of optical fiber lines and the impact of the insertion loss of optical switches on the key generation rate become more and more obvious, which seriously restricts qua...

AI Technical Summary

Problems solved by technology

With the increase in the number of users, the complexity of the network structure and the extension of the communication distance, the inherent loss of optical fiber lines and the impact of the insertion loss of optical switches on the key generation rate become more and more obvious, which seriously restricts quantum communication networks. The scalability, and the backbone network composed of a large number of optical switches also increases the difficulty of network management

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