Evaluating the Effectiveness of MANET Routing Protocols

Mobile communication is the main purpose of using the Mobile Adhoc Networks and these networks are called as MANETs which don’t have a particular infrastructure setup and can also be operated in any conditions and so these are called as infrastructure less networks.

                  Across the MANETs the routing process is depended on the routing protocols that are developed in a large extent and the performance of the routing using these routing protocols is based on the routing mechanism developed and internal technology used in particular routing protocol.

                  In general MANET routing protocols are classified into three types and they are the proactive routing protocols which are also called as table driven routing protocols, reactive routing protocols which are also called as on-demand routing protocols and the third one id hybrid routing protocol. This classification routing protocols is based on the extent of support for the infrastructure of the routing and mode of operation that are applied throughout the network. Generally, a MANET is formed by connecting several nodes using some links with an aim of sending the information packet using a route between the source and destination. The routing protocol used in the network will decide the routing between the nodes.

                    An arbitrary graph is used generally to represent the MANET and sometimes it is also represented using the dynamic graphs and the nodes are used to represent the mobile terminals, and the links that connect these nodes will represent all the routing paths that are available between the nodes. Generally in MANETs multi-hop routing is utilized because of the reason that the range of radio frequency is high, radio frequency is one of the wireless communication formats and its range is more when compared to the other formats and so high end implementation is needed for enabling the routing among the routing protocols.

                      In MANETs, several factors influences the performance of the routing protocols that are selected to use across the MANETs, and these factors include security level employed across the network, maintenance of the route, configuration of router, various types of applications supported by MANETs and different kinds of traffic that are sent throughout the network.

                      MANETs supports different types of traffics and the most important and frequently used traffics are TCP, VBR and CBR traffics here VBR means Variable bit rate and CBR means Constant bit rate. The traffic type selected across the routing procedure will influence the routing protocol performance. The performance of the routing protocol is also based on the nodes selected in the MANETs generally two types of nodes can be used in MANETs and they are mobile nodes and fixed nodes.

                          MANETs are basically dynamic in nature and so it supports a large variety of applications and the most important and most commonly used applications of MANETs are FTP, video conferencing, VOIP, Email, voice and web applications. The characteristic of the traffic sent across the MANET is decided by the selected type of application. The application selected is also used to influence the performance of the routing protocol similarly the selected traffic type also influence the performance of routing protocol that may be reactive or proactive that is used throughout the MANET. The issues related to these MANETs are discussed in many existing studies and researches which also includes the comparison of performance of routing protocols in various aspects which are done mostly among the selected routing protocols when compared to the selected kind if traffic. 

                         The comparison of performances between various traffics should be focused more in the research studies when compared to the focus on the routing protocol across the MANETs, and this is very much necessary. Across every Mobile Adhoc Network, the selected level of mobile transmission and selected type of application decides the type of traffic used in the application and the original source of traffic in the application. In the studies of many research scholars the TCP traffic is compared against the other source of traffics is selected as the research area. Generally in MANETs implementation of comparison of traffics sources is not so perfect when compared to the other networks which are sophisticated, for example the networks like WLAN and ATM. It is already discussed the MANETs supports a wide range of applications, and various metrics will decide the performance of the application used. These metrics are also called as parameters which depend on the selected routing protocol and selected number of mobile nodes used across the network.

                       The performance of any application is decided in terms of the metrics like throughput, delay, packet delivery ratio maintained across the networks. Many studies have included the knowledge about the performance of application attained by the routing protocol used in the network but are not cover the generation of traffic using these applications. In this project, the research area considered is the selection of traffic type across the MANET and the impact of this traffic on the performance of the network, particular in this project, Adhoc Distance Vector routing protocol is used to evaluate the performance of TCP and CBR traffic and also for comparing these traffics across the MANETs.

This paper is written and submitted by Sujana Priya V

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