Research On Clock Synchronization Technology Of Dynamic Wireless Network

With the development of wireless sensor network technology,applications such as unmanned aerial vehicle,internet of vehicles,starlink,and missile group are gradually emerging.The research on dynamic wireless networks is more and more worthy of attention.The clock synchronization technology,as the supporting technology for these applications in dynamic wireless networks,has also become more and more concerned.However,in the clock synchronization of a dynamic wireless network,due to problems such as network heterogeneity and dynamic topology changes,the clock synchronization performance of the network is affected,and the network may lose synchronization in severe cases.In order to adapt the clock synchronization protocol to dynamic wireless networks,this thesis improves on the existing clock synchronization protocol.The main work is as follows:(1)Aiming at the problem of network heterogeneity in wireless networks,the construction of planar clock network topology is analyzed firstly.On this basis,combining with the characteristics of the cluster topology,the hierarchical clock network topology is constructed.Then using the structural synchronization protocol,a network heterogeneous clock synchronization control algorithm is designed,which improves the clock synchronization accuracy under the network heterogeneity.Finally,the effectiveness of the control algorithm is verified by the simulation verification system.(2)Aiming at the problem of dynamic topology change in wireless network,the influence of dynamic topology change on network stability is firstly analyzed,and a dynamic network topology graph model is proposed for this problem.Then combined with the distributed synchronization protocol,a clock synchronization control algorithm for dynamic optimal control is designed,which reduces the problems of low convergence rate and large jitter error caused by topology dynamics.Finally,the simulation system is used to verify the effectiveness of the control algorithm.(3)Facing the design and verification requirements of dynamic wireless network clock synchronization algorithm for heterogeneous network and dynamic topology transformation,a clock network synchronization simulation verification system is designed and implemented,and a simulation verification tool is provided for multiple types of clock network synchronization algorithms such as structured and distributed.In conclusion,for the heterogeneous network and dynamic topology problems in the dynamic wireless network,the improved clock synchronization protocol in this thesis improves the clock network synchronization performance and stability,and reduces the system energy consumption.