Quality of service realization method applied to quantum key distribution network

A quantum key distribution and key distribution technology, which is applied in the field of quantum key distribution network based on trust relay, can solve the problem of insufficient quantum key generation capability, different service delay requirements, and restrictions on the development of quantum key distribution network, etc. question

Inactive Publication Date: 2012-03-28
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] At present, there are very few researches on the quality of service for the trust-based relay quantum key distribution network
As a special type of network, the quantum key distribution network has the following characteristics or requirements: 1. Insufficient quantum key generation capability and shortage of quantum key resources limit the development of the quantum key distribution network; 2. During the key distribution process, the security of key distribution must be ensured to prevent information including routing and key buffer pool status from being intercepted; 3. Different services have different requirements for business delay, so different application services have different requirements for key The urgency of needs also varies

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  • Quality of service realization method applied to quantum key distribution network
  • Quality of service realization method applied to quantum key distribution network
  • Quality of service realization method applied to quantum key distribution network

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Embodiment Construction

[0022] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] This example is based on the Figure 4 In the shown network topology, the global key distribution of the key-guaranteed service between node 1 and node 7 is to use the quantum key minimum consumption method. The routing algorithm used by the quantum key minimum consumption method is open shortest path first, and the established global key distribution path is node 1→node 4→node 6→node 7 (or node 1→node 2→node 3→node 7). After the path is determined, node 1 sends a quantum key reservation request to intermediate nodes 4, 6 and destination node 7. After each node receives the request, it fee...

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Abstract

The invention provides a method that is used for realizing a quality of service (QoS) of global key distribution in a quantum key distribution network based on trust relay. The method comprises: a service classification model of a quantum key distribution network is brought forward; and according to different requirements on global key distribution time delay by service application, the model is divided into three service types: a key-guaranteed service, a key-prioritized service and a key-best-effort service. On the basis of the service classification model, the invention provides a mechanism supporting the QoS of the quantum key distribution network; and according to the mechanism, a quantum key preengagement method is employed for the key-guaranteed service; and a hop-by-hop queuing mode is used for the key-prioritized service and the key-best-effort service as well as a priority queuing algorithm is introduced into the queue.

Description

technical field [0001] The invention relates to the field of quantum key distribution network based on trust relay, and is a method designed for realizing the quality of service (Quality of Service, QoS) of this type of network. Background technique [0002] Quantum key distribution is based on the basic principles of quantum mechanics to ensure the security of key distribution. At present, the main quantum key distribution protocols include BB84, B92 and EPR, among which the BB84 protocol is the most widely used. The protocol uses four quantum states of a single photon, and two mutually orthogonal quantum states constitute a set of orthogonal basis, so there are two sets of orthogonal basis. Each set of orthogonal bases is also a set of measurement bases. The quantum states in different measurement bases are non-orthogonal. When a quantum state is measured with different sets of measurement bases, the result is uncertain and the probability of the two measurement results ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
Inventor 孙咏梅程先柱纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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