طراحي وارزيابي يك روش مسير يابي چند بخشي مبتني بر كيفيت سرويس در شبكه هاي سيار موردي

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Abstract: Ad hoc networks are an important subset of wireless networks without any established infrastructure, and can be used in wars, conferences, search and rescue. One of the problems in these networks is to provide adequate bandwidth for multimedia traffics. According to growing requirements of multimedia application it seems it is necessary to provide Quality of service (QoS) for multicast protocols. Due to impact of providing quality of service in multimedia application and also limitations of ad hoc networks it is necessary to add the capability of supporting quality of service to multicast algorithms, considering that it is much more difficult than unicast algorithms. In this project a new method for estimating bandwidth in multicast protocols (by generalizing calculating rules of available and consumed bandwidth in unicast algorithms to multicast algorithms) is presented. Also we offer an algorithm for providing desirable bandwidth in one of mesh based multicast protocols. Results of simulation over 50 mobile nodes show that the new method can provide desirable bandwidth in multicast groups, more data delivery ratio and less control overhead comparing to primary protocols. Keywords: Ad hoc Networks, Multicast, Quality of Service, Bandwidth

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