Research On Network Topology Variability-oriented QKD Routing Protocol

Because Quantum Key Distribution(QKD)technology can theoretically provide unconditional security,it has received extensive attention around the world.Through more than thirty years of development,QKD technology has become increasingly mature and has gradually become practical.However,commonly used QKD technology only directly supports point-to-point quantum key generation and distribution.So QKD networking has become an important issue that must be solved to promote the development of QKD and expand the scope of QKD applications.The design and optimization of QKD routing protocol is one of the core issues in QKD network.Compared with the classic network,the QKD network has the characteristic of topological volatility.In this dissertation,the QKD routing protocol is systematically studied for this characteristic.The main research contents are as follows:(1)In order to measure the changes in network performance caused by the volatility of the topology in the QKD network,the evaluation index path switching time is proposed.Combining the data packet delivery rate and routing cost in the classic network constitutes a new evaluation system for the variability of the QKD network topology.(2)In order to enhance the adaptability of routing protocols to the volatility of QKD network topology,we proposes AODV-Q and DSDV-Q protocols that can be successfully applied to QKD networks based on AODV(Ad hoc On-Demand Distance Vector Routing)and DSDV(Destination-Sequenced Distance Vector Routing)protocols with link state awareness.And the performance of AODVQ and DSDV-Q protocol in QKD network is analyzed.(3)In order to further optimize the path switching time of the AODV-Q protocol,the HELLO mechanism of the AODV-Q protocol is improved,and an AODV-Q-LST protocol with low path switching time is proposed.(4)In order to verify the effectiveness of the routing protocol proposed in this dissertation,we builds a simulation platform based on the NS3 simulation environment.And conducts experimental verification on the AODV-Q,DSDV-Q,AODV-Q-LST protocols designed in this dissertation.