Mobile Ad-hoc Network (MANET) is a continuously self-configuring, infrastructure-less network. Each device in MANET moves independently and frequently, where the links between the devices are changeable and the whole topology of network is uncertain. To improve the feasibility of such network, a great deal of network-layer protocols has been designed to establish the reliable connections. In this paper, we compared the three typical routing protocols: Destination-Sequenced Distance-Vector Routing (DSDV), Dynamic Source Routing (DSR) and Ad-hoc On-Demand Distance Vector Routing (AODV), in terms of the packet delivery radio, normalized routing overhead and average end-to-end delay. Simulation results show that AODV has the best performance, except the situation where the number of sessions exceeds 10. In addition, we a developed performance analysis software named Performance Analysis Tool of Ad-hoc Routing Protocols (PATAPro), which can help us easily analyze the protocol performance. The description of PATAPro is presented in the appendix of this paper.
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