By The Agreement-based Qos In Mobile Ad Hoc Networks Research And Improvements

Mobile Ad Hoc networks 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 and have been a study focus in current network research. Due to the prevalence of multimedia applications, QoS problem has been regarded as an important research field in Ad Hoc networks. However, it is complex to provide QoS because of the multi-hop, limited bandwidth resource and dynamic network topology in Ad Hoc networks, so it has been an important and difficult problem in research.On the basis of the current research contributions at home and abroad, the thesis makes a deep study on the QoS guarantee routing protocols in Ad Hoc networks, and proposes an independent multi-path routing protocol with bandwidth guarantee, which called QoS-SIMR. Followed is an explanation in detail of the routing discovery, maintenance and resource reservation tactic. Among the routing algorithms in Ad Hoc networks at present, multi-path routing has the characteristic of stability and high utilization ratio of network resource, which makes it has the advantage of single-path routing in QoS routing. This paper adds the bandwidth restriction as the QoS guarantee on multi-path routing protocol SIMR, so QoS-SIMR can efficiently balance network load and offer reliable transmission performance for Ad Hoc networks.The thesis uses NS2 as the simulation tool, making an analysis and comparation between independent multi-path QoS routing protocol QoS-SIMR and multi-path routing protocol. The simulation results indicate that the QoS-SIMR has better performance than multi-path routing protocol on the network delay and data transmission.