Optimal resource allocation in practical quantum keydistribution optical networks br

In the application research of large-scale quantum communication network, one generally realizes resourceallocation by constructing virtual service network and mapping it to actual physical space. In this mappingprocess, some assumptions are often made to simplify the model. For example, the key resource in the physicaltopology is assumed to be a fixed value, that is, the actual physical conditions and the performance differencesof key supply caused by different protocols are ignored. This assumption may lead the network to fail to runappropriately in practical applications. In order to solve the above problems, from the perspective of linkmapping, this paper proposes an improved virtual service mapping model and virtual service mapping algorithmwith the quantum key distribution optical network as the underlying network, which makes it closer to theactual application scenario. On the one hand, by increasing the constraints of geographical location, the rangefrom virtual nodes to the mappable physical nodes is reasonably restricted. On the other hand, from theperspective of hardware cost and actual key generation rate, the cost performance evaluation index is proposedto allocate and manage resources. In addition, by combining three mainstream quantum key distributionprotocols (BB84, measurement-device-independent, and twin-field), we construct a universal virtual servicemapping model in the quantum key distribution optical network, and realize the recommendation of the optimalprotocol and the optimal allocation and management of resources