A virtual service mapping method and device based on quantum key distribution optical network

Abstract

The invention discloses a virtual service mapping method and device for a quantum key distribution optical network. The method may include: sorting the virtual links based on the received virtual service request information for virtual services, and obtaining the virtual link Mapping sequence; determine the mapping combination of physical nodes that can be mapped by the virtual nodes at both ends of the i-th virtual link in the mapping sequence; calculate the mapping combination based on the ksp algorithm, determine an alternative path, and based on the alternative The path determines the key relay path of the i-th virtual path; determines the data transmission path of the i-th virtual link based on the wavelength allocation principle; let i=i+1, execute the determination of the i-th virtual link A combination of mappings that virtual nodes at both ends of a virtual link can map to. The invention coordinates node mapping and link mapping, and can ensure safe transmission of virtual services under the condition of key resources.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a virtual service mapping method and device based on quantum key distribution optical network. Background technique [0002] The emergence of high-performance applications such as cloud computing and high-definition video streaming has put forward higher requirements on the bandwidth resources of optical networks. Different applications have their unique requirements. Network operators cannot flexibly configure optical network resources based on application. Therefore, virtual optical networks (Virtual Optical Networks, VONs) are created, which abstract physical resources according to user business needs. , multiple VONs can be built on the same underlying physical network to share physical resources such as bandwidth in the physical network infrastructure. [0003] In traditional optical networks, VONs can be constructed according to the needs of infrastructure us...

AI Technical Summary

Problems solved by technology

[0006] In the prior art 3, it is proposed to construct a secure VON in the quantum optical network, so that multiple VONs can share computing, bandwidth and key resources in the same physical network, but the node mapping and link mapping are still based on the VON mapping method of the traditional optical network The mapping of key resources should be considered after node mapping and link mapping, which may cause some problems

figure 1 It is a schematic diagram of the VON mapping of the quantum optical network in the prior art, such as figure 1 As shown, the numbers on the links between physical nodes represent the key amount between adjacent nodes, assuming that the key amount requirement between two virtual nodes is 20, and it has been mapped to figure 1 On the source node 101 and the sink node 102 in , if path 2 is selected as the physical link for mapping according to the bandwidth demand, since the key size of each link on path 2 is only 10, it cannot meet the requirements of the source node 101 and the sink node. The number of keys between 102 needs to be 20, which will cause the mapping to fail

Therefore, it is necessary to find a farther path to complete the key relay, but this will lead to a large waste of key resources

[0007] Therefore, the mapping in the prior art cannot fully consider the bandwidth and the amount of keys, and there may be situations where the bandwidth requirements are met, but the key resource requirements cannot be met.

The mapping scheme of nodes first and then links completely separates node mapping and link mapping. There is no way to achieve organic unity. After the node is determined, a suitable path may not be found to meet the requirements, resulting in mapping failure.

Images