International Journal of Computer Networks and Applications

25-31

Authors: Saima Zafar, Hina Tariq, Kanza Manzoor

Mobile ad hoc networks are envisaged to play a vital role in ubiquitous networking owing to their mobility support without relying on infrastructure-based design. Conversely, the same feature makes routing in these networks challenging as compared to the typical wired networks. As a result typical routing protocols designed for wired networks are not appropriate for these networks. A number of routing protocols have emerged over the last few years which can be generally classified as proactive and reactive routing protocols. In this research, we analyze and compare three most important routing protocols from both categories in terms of throughput, end to end delay and packet delivery fraction. This comparison is useful in understanding the requirements and challenges for routing protocols in mobile and ad hoc setting and forms the basis of designing a new routing protocol which we plan to present in future. Our simulation results based on simulations carried out using Network Simulator (NS2) show that Dynamic Source Routing (DSR) protocol gives best performance as compared to Ad-hoc On-demand Distance Vector (AODV) and Destination Sequenced Distance Vector (DSDV) routing protocols when network size is large and node mobility is high.

38-43

Authors: Priyaganga Guruswamy, Madhumita Chatterjee

Mobile Ad-Hoc Network (MANET) is a wireless ad hoc network comprising of mobile devices which undergo peer to peer routing, to provide network connectivity instead of preexisting network infrastructure. Despite its simplicity of network infrastructure, however it poses challenges of variable link capacity, dynamic topology, exhaustible battery power of nodes and limited physical security. In MANET, broadcasting is a conventional mechanism carried out to deliver messages from source node to all other nodes in MANET. Flooding is commonly used method for broadcasting of Route Request (RREQ) packet which is prone to broadcast storm problem. As a result, there is a need of an efficient routing strategy to build a reliable route which can neglect high variation of signal strength, collision and draining of battery power. In this paper, a new approach is introduced to rebroadcast based on an efficiency factor called delay and to provide a route repairing procedure against link failures. Our approach also focuses on disseminating neighbor coverage knowledge within nodes in order to avoid duplication problem of RREQ packets. Simulation results of our approach reveal better performance in terms of metrics such as packet delivery ratio, energy consumption and control overhead.