实用化量子密钥分发光网络中的资源优化配置  

Optimal resource allocation in practical quantum key distribution optical networks

作　　者：朱佳莉 曹原 张春辉 王琴[1,2,3] Zhu Jia-Li;Cao Yuan;Zhang Chun-Hui;Wang Qin(Institute of Quantum Information and Technology,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Key Laboratory of Broadband Wireless Communication and Sensor Network of Ministry of Education,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;The National Engineering Research Center for Communications and Networks,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学,量子信息技术研究所,南京210003 [2]南京邮电大学,宽带无线通信与传感网教育部重点实验室,南京210003 [3]南京邮电大学,通信与网络国家工程研究中心,南京210003

出　　处：《物理学报》2023年第2期1-11,共11页Acta Physica Sinica

基　　金：国家重点研究发展计划(批准号:2018YFA0306400);国家自然科学基金(批准号:12074194,12104240,62201276);江苏省重点研发计划产业前瞻与关键核心技术项目(批准号:BE2022071);江苏省自然科学基金(批准号:BK20192001,BK20210582);江苏省高等学校自然科学研究项目(批准号:22KJB510007);南京邮电大学自然科学基金(批准号:NY220123)资助的课题.

摘　　要：在大规模量子通信网络应用研究中,人们一般通过构建虚拟业务网络并将其映射到实际物理空间来实现资源的分配.在该映射过程中,为简化模型常常做一些假设,比如假定物理拓扑中的密钥资源为某一固定值,即忽略实际物理条件以及不同协议对密钥供给带来的性能差异.这种忽略实际物理条件的假设可能导致该网络在实际应用中无法正常运行.为解决以上问题,本文从链路映射的角度出发,以量子密钥分发光网络为底层网络,提出了改进的虚拟业务映射模型和虚拟业务映射算法,使其更加接近于实际应用场景.一方面通过增加地理位置的约束,对虚拟节点到可映射的物理节点范围做合理限制;另一方面,从硬件成本和实际密钥生成速率角度出发,提出了性价比的评估指标对资源进行分配管理.此外,我们通过结合3种主流的量子密钥分发协议(BB84、测量设备无关、双场),构建了普适的虚拟业务在量子密钥分发光网络中的映射模型,实现了最优协议的推荐和资源的优化配置管理.In the application research of large-scale quantum communication network,one generally realizes resource allocation by constructing virtual service network and mapping it to actual physical space.In this mapping process,some assumptions are often made to simplify the model.For example,the key resource in the physical topology is assumed to be a fixed value,that is,the actual physical conditions and the performance differences of key supply caused by different protocols are ignored.This assumption may lead the network to fail to run appropriately in practical applications.In order to solve the above problems,from the perspective of link mapping,this paper proposes an improved virtual service mapping model and virtual service mapping algorithm with the quantum key distribution optical network as the underlying network,which makes it closer to the actual application scenario.On the one hand,by increasing the constraints of geographical location,the range from virtual nodes to the mappable physical nodes is reasonably restricted.On the other hand,from the perspective of hardware cost and actual key generation rate,the cost performance evaluation index is proposed to allocate and manage resources.In addition,by combining three mainstream quantum key distribution protocols(BB84,measurement-device-independent,and twin-field),we construct a universal virtual service mapping model in the quantum key distribution optical network,and realize the recommendation of the optimal protocol and the optimal allocation and management of resources.

关 键 词：资源优化配置 量子密钥分发 虚拟业务映射 性价比 

分 类 号：O413[理学—理论物理] TN918.4[理学—物理] TN929.1[电子电信—通信与信息系统]