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Route selection system and route selection method of quantum key distribution (QKD) network and on basis of optical path switching

A technology of optical path switching and optical switching, which is applied in data switching networks, transmission systems, digital transmission systems, etc., and can solve the problems of simple QKD network topology, small scale, and poor routing capability.

Active Publication Date: 2013-07-10
中数(深圳)时代科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of simple QKD network topology and small scale in the existing QKD network due to poor routing selection ability, the present invention proposes a routing selection system and a routing selection method for a QKD network based on optical path switching

Method used

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  • Route selection system and route selection method of quantum key distribution (QKD) network and on basis of optical path switching

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specific Embodiment approach 1

[0024] Specific implementation mode one: combine figure 1 Describe this embodiment, the routing selection system of a QKD network based on optical path switching described in this embodiment, it is composed of M optical switching nodes; M is an integer greater than or equal to 2; each optical switching node includes a network topology Auto-discovery module 1 and pilot signal protocol module 2;

[0025] The network topology automatic discovery module 1 includes a call protocol submodule 1-1, an exchange protocol submodule 1-2, a diffusion protocol submodule 1-3 and a QKD network topology automatic discovery module 1-4;

[0026] The pilot signal protocol module 2 includes a pilot signal protocol path discovery submodule 2-1, a pilot signal protocol path selection submodule 2-2 and a pilot signal protocol path confirmation module 2-3;

[0027] The call protocol submodule 1-1 is used to send data packets to each neighbor optical switching node, establish and maintain the connecti...

specific Embodiment approach 2

[0034] Specific embodiment two: this embodiment is the routing method of the routing selection system of a QKD network based on optical path switching described in specific embodiment one, the specific steps of the method:

[0035]Step 1, the user sends a QKD communication request signal to the pilot signal protocol module 2, and the pilot signal protocol module 2 sends the source node and destination node information in the user request information to the pilot signal protocol path discovery sub-module 2-1;

[0036] Step 2, the pilot signal protocol path discovery sub-module 2-1 utilizes the topology structure table of the entire QKD network sent by the QKD network topology automatic discovery module 1-4 to obtain all feasible communication path tables from the source node to the destination node, and the source node All feasible communication path tables to the destination node are passed to the pilot signal protocol path selection submodule 2-1;

[0037] Step 3, the pilot s...

specific Embodiment approach 3

[0039] Specific embodiment three: this embodiment is a further description of the routing method of the routing system of a QKD network based on optical path switching described in specific embodiment two, the pilot signal protocol path discovery submodule 2 described in step two -1 Utilize the topology structure table of the entire QKD network sent by the QKD network topology automatic discovery module 1-4 to obtain all feasible communication path tables from the source node to the destination node as follows:

[0040] Step A1, from the topology table of the entire QKD network sent by the QKD network topology automatic discovery module 1-4, query all feasible communication paths from the source node to the destination node in the network topology, and query the source node of each feasible communication path Whether the channel resources can meet the requirements of establishing an optical path to the next hop node of the route, if so, calculate the loss and delay of the commu...

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Abstract

The invention belongs to the field of quantum communications and quantum key distribution (QKD) networks, particularly relates to a route selection system and a route selection method, and discloses the route selection system and the route selection method of a QKD network and on the basis of optical path switching. Through the route selection system and the route selection method of the QKD network and on the basis of the optical path switching, the problems that the route selection ability of an existing QKD network is poor, and therefore the existing QKD network is simple in topology and small in scale are solved. The route selection system of the QKD network and on the basis of the optical path switching comprises optical path switching nodes, wherein the number of the optical path switching nodes is M, a call protocol sub module of each optical path switching node can automatically find a topology structure table, sent by the module through the QKD network topology, of the QKD network and obtain a table including all feasible communication paths from a QKD communication request source node to a destination node, a pilot signal protocol path selection sub module is used for selecting an optimal communication path from the table including all the feasible communication paths, the optimal communication path is used as a current communication path, a pilot signal protocol path confirmation module is used for confirming the selected optimal communication path, and then a communication channel from the source node to the destination node is built. The route selection system and the route selection method of the QKD network and on the basis of the optical path switching are suitable for the communication field.

Description

technical field [0001] The invention belongs to the field of quantum communication and quantum key distribution network, and in particular relates to a routing selection system and a routing selection method. Background technique [0002] With the development of the network, the security requirements of information transmission are getting higher and higher. Currently, one of the commonly used information security methods is cryptography. Among them, the method of encrypting once for one communication is a provably effective security encryption means. The method of encrypting once for one communication requires both communicating parties to carry out key distribution to obtain a shared key, and its security depends on the security of key distribution. At present, it is very difficult to achieve absolutely secure key distribution through classical communication means, but the emergence of Quantum Key Distribution (QKD) technology has solved this problem. [0003] With the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/751H04L9/08H04L29/06H04B10/25H04L45/02
CPCH04L9/0855
Inventor 牛夏牧李琼韩琦王莘于立洋贾丙强
Owner 中数(深圳)时代科技有限公司
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