Research On Ad Hoc Network Management Technology

China is a country with frequent natural disasters.After disasters such as earthquakes,typhoons,and floods occur,the fixed communication infrastructure in disaster areas is often severely damaged,leading to the paralysis of communication networks.Deploying emergency ad hoc networks with strong resilience and no dependence on infrastructure in disaster areas is of great significance for rescuing the lives of disaster victims.The deployment and efficient operation of ad hoc networks cannot be separated from network management.It is urgent to solve the problems of topology discovery difficulties and high bandwidth resource loss brought by ad hoc networks to network management in emergency and disaster relief environments,and propose feasible solutions.The main focus of this thesis is to propose appropriate solutions for the challenges posed by emergency and disaster relief scenarios and the characteristics of ad hoc networks to network management,design and implement a simple and feasible ad hoc network management system,and set up a real node environment for testing.The main research work of this thesis is as follows:Firstly,considering that the movement of nodes,the addition of new nodes,and node failure in an ad hoc network can all lead to dynamic changes in the network topology,and that ad hoc networks composed of devices equipped by different rescue teams have heterogeneous characteristics,this thesis designs an ad hoc network topology discovery algorithm that adapts to the dynamic changes and integrated management of heterogeneous ad hoc networks,Combining a hierarchical structure to adapt to heterogeneous ad hoc networks and scale issues composed of different rescue teams,and combining intra cluster topology discovery algorithm and whole network topology discovery algorithm to complete the topology structure acquisition of the entire network.The simulation results show that the self-organized network topology discovery algorithm designed in this thesis can effectively reduce the consumption of bandwidth resources,run faster,and verify the effectiveness of the algorithm through real network experiments.Afterwards,the ad hoc network uses wireless transmission,so the communication bandwidth between devices is limited.However,a large amount of network management data occupies too much bandwidth,which affects the quality of other communication services,and the differentiation of different network management commands and data is small.Different network management instructions and data differentiation are small.This thesis designs a Quality of Service(QoS)model for ad hoc networks to optimize performance transmission,considering the availability of bandwidth to design two-level scheduling algorithms for more detailed packet scheduling of services,and designs modules such as queue management and congestion control to cooperate with the implementation of model functions.The simulation results show that the NM-QoS model designed in this thesis can classify and schedule according to different network management instructions and data services,and can reduce the impact of a large number of network management data services generated by polling on other communication services.Compared with other models,the NM-QoS model has more advantages in terms of average end-to-end delay and successful packet delivery rate.Finally,according to the requirements of ad hoc network management,an ad hoc network management system is designed and implemented.The system mainly includes four main functions: Topology structure acquisition and presentation;View device information;Interface traffic information monitoring;Active fault polling and fault alarm.At last,the usability of the system was verified by building a simple experimental environment for testing.