| Quantum wireless multi-hop network is the network consisted of nodes equipped with both quantum communication and classical wireless communication capability, obeying quantum-mechanical rules, to realize the quantum communication. It is the extension of quantum communication network in the field of wireless communication and has extensive applications in wireless security communication. Quantum teleportation and quantum wireless routing protocol are two essential key technologies in quantum wireless multi-hop network. However, there are some problems in the existing the methods for quantum multi-hop teleportation, such as large transmission delay, large classical communication cost and low maximum probability of successful transmission, In the meanwhile, the routing metric and quantum path selection method in quantum wireless routing protocol may limit the quantum multi-hop teleportation’s performance. It cannot meet the application requirement to quantum wireless multi-hop network in the future.In this dissertation, We study quantum multi-hop teleportation and quantum wireless routing protocol deeply. We propose new methods, including simultaneous multi-hop teleportation method, the measurement result-mapping method and quantum path check in advance method, to reduce transmission delay and classical communication cost. We choose two-particle and three-particle partially entangled states as quantum channel teleport arbitrary two-particle quantum state to improve the maximum successful rate. We also verify routing metric and quantum path selection method that fit well with the actual scene features for quantum wireless multi-hop network through simulation. The main research work and innovative points of this dissertation are listed as follows:1. Based on arbitrary Bell pair, the multi-hop simultaneous low-delay teleportation method is proposed to realize efficient quantum information transmission in quantum wireless multi-hop network. The method utilizes simultaneous quantum entanglement swapping to reduce the multi-hop transmission delay. Compared with serial entanglement swapping, the method is proved lower transmission delay and appropriate to more general network topology in theory. In the meanwhile, for restoring quantum state correctly, the methods of matrix calculation and finite-state machine are provided. Compared with exhaustion and diagram method, it reduces the complexity.2. Based on the post quantum measurement result-mapping, one method is proposed a method for reducing the classical communication cost. The mapping module of measurement results solve the problem of the rise of the classical communication caused by sharing arbitrary Bell pair in the classical information level. The operation is simple and easier to be implemented compared with the method of the pre Bell pair transformation. At the same time by piggybacking control information on Routing Protocol (piggyback) packet, the method avoids the additional control cost. The theoretical analysis shows that the classical communication cost is reduced by 50%.3. A new method of transferring arbitrary two-particle entanglement state using one two-particle partially entangled state and one three-particle entangled W state as quantum channel is proposed. By introducing auxiliary particle, the method can restore quantum state successfully. The theoretical analysis proves that the maximum probability of successful quantum teleportation is promoted to 2/3. Compared with the use of double W state as the quantum channel method (4/9), the maximum probability of successful transmission increases 50%. And then, it is generalized to more general cases. With the help of the two-particle entangled state and three-particle partially entangled GHZ state as the channel to realize the transmission of arbitrary two-particle states, the theoretical analysis proves that its maximum probability of successful transmission can reach 1.4. Based on prior quantum path check method, one quantum wireless source routing protocol is proposed to meet the requirements of quantum information in simultaneous multihop transmission in the network. After simulation tests, the transmission success rate of original the routing protocol is raised from 85% to 100%. Combing with the simultaneous multi hop teleportation method, and introducing the "expected classical communication hops" as the routing metric, the quantum wireless source routing protocol reduce multi hop transmission delay by 35%. At the same time, the simulation result verifies that the quantum measurement result-mapping method can reduce 49% classical communication cost of quantum teleportation.
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