Proper

Abstract

The network reliability is an important concern in Mobile Ad-hoc Network (MANET). Therefore, it is essential to evaluate the reliability of the MANET. Many MANET routing protocols assume the availability of reliable nodes. This, however, is not a realistic in practical situations due to the dynamics of given wireless ad-hoc networks. Link failures and node failures are always possible due to dynamic topology. Hence, a realistic model is essential to evaluate reliability of MANETs, which is suitable in case of this types of failures. In this paper, a node failure model has been proposed. This node failure model is injected into the MANET and the Dynamic Source Routing (DSR) protocol is modified accordingly. Then, the reliability and performance evaluation of MANET is carried out. This paper also evaluates how well a DSR protocols for MANETs behave under a realistic scenario of node failures and topology changes. A gap analysis is then carried out to observe the impact of node failure on reliability and performance of MANET.