ISSN: 2277-9655 [PURNIYA * et al., 7(2): February, 2018] Impact Factor: 5.164 IC™ Value: 3.00 CODEN: IJESS7 http: // www.ijesrt.com© International Journal of Engineering Sciences & Research Technology [200] IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY A COMPARATIVELY ANALYSIS OF VARIOUS MANET BASED THROUGHPUT ENHACEMENT TECHNIQUES Rohit Purniya *1 & Dipti Rai 2 *1&2 Electronics and Communication Engineering Department, Alpine Institute of Technology, Ujjain DOI: 10.5281/zenodo.1165920 ABSTRACT The advent of ubiquitous computing and the proliferation of portable computing devices have raised the importance of mobile and wireless networking. A mobile ad hoc network is an autonomous collection of mobile nodes forming a dynamic network and communicating over wireless links [Figure 1.1]. Ad hoc communication concept allows users to communicate with each other in a multi-hop fashion without any fixed infrastructure and centralized administration. Due to their capability of handling node failures and fast topology changes, such networks are needed in situations where temporary network connectivity is required, such as in battlefields, disaster areas, and large meeting places. Such networks provide mobile users with ubiquitous communication capability and information access regardless of location. I. INTRODUCTION TCP has gained its place as the most popular transmission protocol due to its wide compatibility to almost all today’s applications. However, TCP as it exists nowadays may not well fit in mobile ad hoc networks since it was designed for wire-line networks where the channel Bit Error Rate (BER) is very low and network congestion is the primary cause of packet loss. On the contrary of wired links, wireless radio channels are affected by many factors that may lead to different levels of BER. In addition to wireless channel behaviour, one of the most prominent features of Ad Hoc networks is mobility of nodes. Thus, since the devices of such a network are battery operated, they need to be energy conserving so that battery life is maximized. In the last few years, lot of research efforts have been undertaken in order to design ad hoc networking protocols that takes into consideration energy consumption aspects. Among them, a set of routing protocols [1] that have been proposed in the last few years in order to ensure network connectivity when minimizing energy consumption of mobile nodes at the same time. In the mean time, only few works dealing with energy efficiency of TCP variants have been undertaken. The objective of our work is, first, to study the performance of these TCP variants and their impact on the energy consumed by mobile nodes. Then, our second objective is to study the effect of IETF MANET routing protocols on TCP energy consumption. The result of this work can then be used, in a near future, as a guideline to design new energy-efficient TCP variant for ad hoc networks. II. MOTIVATION In the last few years, many researchers have studied TCP performance in terms of energy consumption and average good put within wireless mobile networks [2][3][4]. Due to the specific issues related to wireless ad hoc networks, it is expected that the performance of TCP will be affected considerably in these environments. In wireless ad hoc networks, reasons for packet losses are more sophisticated than traditional wireless (cellular) networks. Those reasons include the unpredictable wireless channel characteristics due to fading and interference (implying a high BER), the vulnerable shared media access due to random access collision, the hidden and exposed terminal problems, path asymmetry, multi-path routing, and so on. Undoubtedly, all of these pose great challenges on TCP to provide reliable end-to-end communications in such environment.