Priority Aware Qos Enhancement in Aodv Routing Protocol In Manets

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Addis Ababa University


Mobile Ad hoc Networks (MANETs) are constructed from mobile nodes that cooperate among themselves to transmit traffic flows for communication without infrastructure support in distributed coordination fashion in wireless communication system. Quality of Service (QoS) is one of the critical issues in MANETs and several researches have been done so far. However, the characteristics of infrastructure-less and limited resource, QoS provisioning in multiple class of services in MANETs imposed a challenging task. We proposed enhanced priority aware QoS in Ad hoc on Demand Distance Vector (AODV) routing protocol in MANETs. In this thesis we treated services according to traffic type on the basis of services priority level for QoS requirement. Traffic are classified and scheduled according to the type of service which aims to serve better high priority traffic over low priority traffic services that fulfil the QoS requirement for flow of traffics. The proposed system maximizes the performance of QoS in MANETs by reducing congestion. The scheduler in the proposed system is a weighted round robin algorithm which schedules classified traffic that provides the intended QoS fairly among high priority and low priority traffic classes as well as managing the resources effectively. Admission control is applied to admit traffic flow based on the state of the network and AODV is modified to support QoS to perform routing efficiently. Simulation experiment is done under different network scenarios to demonstrate and justify the effectiveness taking important QoS metrics in NS-2. From the experiments conducted and based on facts identified from analysis the proposed solution significantly outperforms AODV.



Quality of Service, Mobile Ad Hoc Networks, Traffic Classes, Scheduling