Quantum communication network, method and communication site thereof

Abstract

The application discloses a quantum communication network, a method and a communication site thereof. In the quantum communication network, a center communication site comprises a quantum communication terminal and a quantum communication server, a secondary communication site comprises a quantum communication terminal, a photonic device, and optical switches; an IN port of each optical switch canpoint to the OUT port of a local optical switch or the local photonic device under the control of the quantum communication server, wherein the quantum communication server is used for performing thecorresponding switching operation through all optical switches on a line between the center communication site and a target secondary communication site, thereby constructing a quantum communicationlink between the center communication site and the target secondary communication site; the quantum communication terminal of the center communication site is used for acquiring a quantum key corresponding to the target secondary communication site from the local key storage space, and the corresponding quantum encryption communication is performed between the quantum key and the target secondarycommunication site. Through the quantum communication network disclosed by the application, the effects of reducing the amount of the quantum communication terminal in the control center and reducingthe amount of the fiber core are achieved.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to a quantum communication network, a method and a communication site thereof. Background technique [0002] As an efficient and safe communication technology, quantum communication technology is receiving more and more attention and research. There are mainly two current quantum communication networking methods, among which: [0003] In the first networking mode, independent and directly connected optical fibers and equipment need to be set up between any two communication sites. There are as many cores and pairs of equipment as there are sites. The more fiber cores are arranged on the route. For example: if figure 1 As shown, control center A performs quantum key distribution communication with site B, site C, site D, and site E, which requires 4 cores between AB (ab1, ab2, ab3, ab4), and 3 cores between BC (bc1 . A3-D1, A4-E1). [0004] In the second networkin...

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Problems solved by technology

[0004] In the second networking method, a matrix optical switch is installed in the control center, which reduces the number of devices to a certain extent, but cannot reduce the number of fiber cores

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