A Study On Ad Hoc Network For Maritime Communication System

The mobile Ad Hoc network is a wireless system without a fixed (wired or wireless)infrastructure. It is a self-organizing network composed of mobile nodes or users. Thechief difference between mobile Ad Hoc networks and conventional cellular technology is the apparent lack of a centralized entity within an Ad Hoc network. There are no basestations or mobile switching centers in an Ad Hoc network. Consequently, all network protocols must operate in a distributed manner. Recently, mobile Ad Hoc network becomes the hot spot of personal communications and Internet due to its flexible and convenient mobility support and continuous seamless multimedia communication.In allusion to the problems existing in the maritime mobile communication network, this dissertation, at the very beginning, introduces the origin, characteristics, applications and current situations of the mobile ad hoc network. Then,from the intensely active area of research in mobile Ad Hoc networks,multiple access control (MAC) protocols, performance comparison of routing protocols cost-efficient QoS routing protocol for mobile Ad Hoc networks are studied in this paper. Based on the study, this dissertation does simulations in depth upon three routing protocols (DSDV, DSR, AODV) of two different types (Proactive, Reactive) under a variety of situations including different network-scales, different topology ranges, different node receiving thresholds, different node movement scenarios and traffic scenarios. The results show that proactive routing protocols like DSDV have comparatively shorter average end-to-end delay, while reactive routing protocols like DSR and AODV have comparatively better performances on delivery rate and routing overhead.The main research works is a performance hoc networks comparison of three routing protocols developed for mobile ad is researched. The protocols are (DSR), demand Destination Sequenced Distance Vector Dynamic Source Routing (DSDV) and Ad-hoc On Distance Vector (AODV). Extensive simulations are made on a scenario where nodes move randomly and the related results are given which can be used in network decision-making process.