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Multicast and Unicast ODMRP Routing in Ad hoc Networks Based on Quality of Service Support and Local Recovery Approach

Multicast and Unicast ODMRP Routing in Ad hoc Networks Based on Quality of Service Support and Local Recovery Approach

Mehdi Effatparvar (Islamic Azad University - Ardebil Branch, Iran), Amir Darehshoorzadeh (Eyvanakey Institute of Higher Education, Iran), Mehdi Dehghan (Amirkabir University of Technology, Iran), and Mohammad Reza EffatParvar (Informatics Services Corporation, Iran)
Copyright: © 2008 |Pages: 22
DOI: 10.4018/jbdcn.2008100105
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Abstract

An ad hoc network is comprised of mobile hosts without any wired infrastructure support. The primary concerns in ad hoc networks are bandwidth limitation and unpredictable dynamic topology. Therefore, efficient bandwidth utilization is crucial in routing protocols. Reliable multicast plays a significant role in many applications of mobile ad hoc networks (MANETs). The on-demand multicast routing protocol (ODMRP) was designed for multicast routing in ad hoc networks. However, ODMRP supports unicast routing too. It is very important to efficiently allocate and consume link bandwidth in this protocol, especially when many sessions are working concurrently. In this article, we propose a new method for estimating bandwidth in multicast protocols and also a new technique for supporting QoS routing in multicast and unicast ODMRP by making an acceptable estimation of available and required bandwidth. Also, we propose a local recovery approach to design a reliable multicast algorithm. Simulation results show that using QoS routing for ODMRP improves network performance in presence of mobility, by searching for suitable paths. By local recovery approach, nodes can join to multicast group in minimum time, and data delivery will be increased.

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