Research On QoS Based Multicast Routing Protocols In Mobile Ad Hoc Networks

Mobile Ad Hoc networks(MANET) with the prospect of extensive application in military and civilian fields,which are multi-hop temporary autonomous system of mobile nodes equipped with wireless transceivers and receivers,have been a study focus in current network research.With the prevalence of multimedia applications, the Quality of Service(QoS ) issue has been regarded as an important research field in Mobile Ad Hoe networks.However,it is more complex to provide QoS in MANET characterized with multi-hop,limited bandwidth resource and dynamic network topology than in traditional wired or wireless networks.Therefore networks researchers are confronted with new challenges.Scholars at home and abroad have done enormous researches studies on QoS routing in recent years,however there still exist many unresolved problems and the studies on QoS routing technology in MANET just begin,especially in the initial stage of QoS routing technology in MANET.Based on studying and analysis of current relevant research contributions,this dissertation makes extensive and thorough research on how to provide routing protocols and algorithms with QoS guarantee in mobile Ad Hoc networks.The main work can be seen as follows:1) Based on research of the existing Ad Hoc network routing algorithms,the dissertation discusses QoS routing and the implementation of the ideas and methods in mobile Ad Hoc networks.It describes some of latest research on QoS routing protocols and presents the analysis and comparison of performance on QoS routing protocols.2) Based on analysis of multipath routing and AODV,the dissertation puts forward a mobile Ad Hoc on-demand distance vector multipath QoS routing protocol (AODVMQR) based on AODV.The protocol takes some measures to reduce cost and delay,makes use of multipath routing mechanism and the idea of motion predicting,provides the guarantee of QoS which parameter is bandwidth.It quotes the thought of routing record in DSR to discover several disjoint routing in the phase of routing discovery.It uses the method to balance load in MSR,which set weigh in each route to allocate business.The simulation result shows that AODVMQR protocol decreases the routing cost,increases the packet delivery rate and decreases the end to end delay,improve the quality of service.3) The dissertation puts forward a mobile Ad Hoc energy constrained routing protocol(ECRP) based on analyzing existing routing protocols.ECRP not only makes the system energy consumption low but also prolongs the system lifetime and improves the delay characteristic based on the mobile network node energy level and using the different forward tactics.In this dissertation,the proof of correctness and complexity analysis of ECRP are given.The simulation result shows that ECRP has a better delay performance,a lower energy consumption and longer network lifetime and provides an available approach to Ad Hoc networks routing.4) The dissertation puts forward a network model based on analysis of energy constrained multicast routing optimization algorithm.Combined network model, energy model,combination of extreme elements and improved genetic algorithms,it presents an energy constrained QoS multicast routing optimization algorithm.The simulation result shows that the algorithm is feasible and effective and provides an available approach to Ad Hoc networks QoS multicast routing.This dissertation is supported by National Natural Science Foundation of China (No.60172035,60773211),Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20060497015),and the Research Project of Hubei Province of China(No.2007AA101C63).