Bidirectional Quantum Transmission Protocol And Its Routing Design

With the development of information technology,people are more and more demanding on the efficiency and security of communication.The continuous upgrades of the traditional information encryption technology mean that the network information security has been improved.However,because of the characteristics of traditional communications,it cannot guarantee the absolute security of information.The quantum communication has the technical superiority in the information confidentiality.Therefore,applying the quantum technology in the traditional communication will bring the technological innovation to the communication industry.This paper focuses on the bidirectional wireless quantum communication network composed of nodes with wireless channel and quantum channel.The following two aspects are studied:one is to solve the output result of bidirectional multi-hop teleportation;the other is to design an effective wireless quantum routing protocol.The purpose of the research is to reduce the transmission delay,improve the transmission efficiency of wireless quantum multi-hop network and optimize the structure of wireless quantum network.Firstly,this paper studies the bidirectional quantum transmission scheme.Based on the characteristics of bidirectional quantum transmission,quantum teleportation is applied to access control in communication systems.A quantum handshake protocol based on teleportation is proposed.The paper mainly analyzes the feasibility of bidirectional teleportation as quantum beacons,calculates the average delay of handshake beacon protocol system based on teleportation,and compares bidirectional handshake beacons with unidirectional handshake beacons.Secondly,a bidirectional quantum transmission scheme based on the GHZ-Bell state channel is proposed.A method to determine the output state is also proposed.The path characteristics between the source node and the destination node of the wireless quantum communication network are discussed.The result of bidirectional quantum multi-hop transmission is given under the condition that the path of the quantum is determined and the quantum channel between the nodes are in Bell states.A brief discussion is carried out on quantum channels with other entangled channels.Finally,this paper studies the method of bidirectional quantum multi-hop routing in wireless communication networks and introduces the particle distribution nodes to model the wireless quantum communication network.According to the characteristics of bidirectional quantum transmission,a routing method of active routing wireless quantum communication network is proposed.By calculating the adjacency matrix representing the quantum connections among the nodes,this method can find the path of the minimum quantum number of hops between two communicating nodes.Since the quantum channel between nodes is undirected,the quantum channel topology formed by all the nodes is an undirected graph.The path calculated by the single-source shortest path method is also the shortest path from the destination node to the source node.By optimizing the position of the particle distribution nodes,the routing protocol chooses the path with the minimum transmission delay while guaranteeing the minimum quantum hop count.Through the wireless quantum communication network routing simulation,the validation of the proposed wireless quantum communication routing protocol is verified.After determining the path between the two communication nodes,the particle distribution nodes are notified to establish the quantum channel.At this point,the path selection and channel establishment of the wireless quantum network have been completed.