Reliability Analysis In Wireless Networks

With the rapid development of the wireless communication technology, the size and complexityof the wireless network increases as well. Meanwhile, due to the problem of date loss and networkfailure in the wireless network operation, the wireless network reliability has drawn great attention.How to guarantee the network reliability is becoming one of the important problems in wirelessnetwork research field. Hence, this dissertation studies the reliability in wireless networks．The main contents can be summarized as follows:Firstly, as the introduction section, Chapter1introduces the research history of reliability inwireless network and the technology development. Then, the research contents of this thesis areintroduced.Chapter2summaries the theoretical research methods for the reliability in wireless networks,including the basic methods and research steps, system mathematical modeling, reliabilityperformance indexes of wireless network reliability, computer simulations and tests．Chapter3studies the reliability in event-driven wireless sensor networks including theinstantaneous network reliability and the mean time to failure. Initially, an event-driven wirelesssensor network model is described in terms of limited node battery energy and shadowed fadingchannels. Then, based on two transmission approaches, such as the multiple-sending transmissionapproach and the acknowledgment-based transmission approach, the analytical expressions of theinstantaneous network reliability and MTTF are derived. Finally, the simulation results validate thecorrectness and accuracy of the analytical results.Chapter4studies the network reliability and availability of a static wireless mesh network withmultiple interfaces. Initially, a system model is described in terms of network model, and link model.Then, the network reliability and availability of a planned topology with multiple interfaces is studied.Finally, Chapter5concludes the thesis.