Computer Science And Technology - Master Dissertation
Permanent URI for this collectionhttps://kr.cup.edu.in/handle/32116/80
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Item Performance evaluation of manet routing protocols dsdv, tora enhanced tora(Central University of Punjab, 2014) Kaur, Amandeep; MeenakshiWireless Networking has become the phrase du jour these days because of an attractive number of benefits it offers to the end users, by enabling them to access and share a wide pool of resources and information across the globe. Mobile ad hoc networks (MANETs) are a kind of infrastructure less wireless networks in which all the nodes act as peers and themselves configure the network. Mobile ad hoc networks are an open area of research because of its applicability in a number of areas like tactical networks, emergency services and education. One of the major challenges in networking is the efficient, accurate, reliable, secure and immediate delivery of data from source to destination. Therefore, the efficient routing of data across the mobile ad hoc network is a major concern of researchers all over the world. Several routing protocols have been developed to send data efficiently across mobile ad hoc networks. These protocols have been divided into three categories- Proactive, Reactive and Hybrid. The performance evaluation of these protocols has been going on since a long time. Most of the current research focuses on the pause times, simulation times and network size to measure the performance of various mobile ad hoc network routing protocols. A very few work has been done on the performance analysis of protocols by varying the underlying mobility models and traffic patterns. This dissertation work is focused on the improvement of the poor performance of TORA with the rise in number of traffic connections. This behavior has been credited to the link sensing mechanism of Internet MANET Encapsulation protocol (IMEP). IMEP is a multi-purpose network-layer protocol that supports the operation of many routing protocols including TORA. It provides mechanism for sensing the status of links in TORA. This link sensing mechanism has been investigated and proposed modification by K. H. Lim and A. Datta has been implemented to observe improvement in the overall performance of Enhanced-TORA protocol in comparison with original TORA. iv Through this research, investigations have been made into the behavior of DSDV, and TORA mobile ad hoc routing protocols by varying the underlying mobility models (Random Waypoint, Random Direction and Manhattan Grid model) and Traffic patterns (FTP, TELNET, HTTP). The metrics used to analyze the performance are Throughput, Average End to End delay, Routing overhead, Packet Delivery Ratio and Packet Loss. This research draws an analysis whether under which mobility model and traffic pattern combination these protocols give the best performance. Results show that DSDV gives best performance under Manhattan Grid Mobility model and FTP traffic pattern. Whereas, TORA and Enhanced-TORA give best performance under Random Direction Mobility model and FTP traffic. The performance of Enhanced-TORA is then compared with original TORA using 10 traffic connections under Random Direction mobility model and FTP Traffic and it was observed that Enhanced-TORA outperformed original TORA thereby eliminating the problem of performance degradation with rise in number of connectionsItem Security in AODV protocol using and hybrid cryptography(Central University of Punjab, 2014) Singh, Khushmeet; Kaur, AmanpreetA mobile Ad hoc network (MANET) is a wireless decentralized self-configuring network in which nodes communicate with each other either directly or through intermediate nodes. These unique features (self-configuring, infrastructure-less, decentralized) make MANET suitable for use in emergency situations, military operations, education, entertainment, sensor networks etc. Besides the various advantages, the open medium, rapidly changing topology and lack of centralized monitoring make MANETs vulnerable to various attacks. This dissertation work focuses on network layer attacks. Network layer attacks in MANET are categorized into two basic types namely active and passive. In active attack, an attacker disrupts the regular operation of the network, change the data or harm the system. In passive attack, the attacker does not disturb the operation of network but attempts to seek some valuable information. So, it is vital to develop some security mechanism to protect MANETs from attacks. This dissertation work focuses on providing solution to prevent MANETs from two active attacks namely Blackhole and Malicious Packet Dropping and one passive attack namely Eavesdroping attack. The existing AODV Protocol is modified to prevent these attacks. Solution is proposed and simulated to prevent Blackhole and Eavesdropping attack. Malicious packet dropping attack is prevented by using Watchdog Intrusion Detection System (IDS). Performance of AODV and Modified AODV protocol is analysed with respect to Packet Delivery Ratio, Average End-to-End Delay and Routing Overhead. To prevent Eavesdropping attack, a hybrid cryptography technique has been developed which combines best features of both symmetric key cryptography and asymmetric key cryptography i.e. speed and security. Simulation has been done in Network Simulator version 2.35.Item Performance evaluation of AODV based congestion control protocols in manet(Central University of Punjab, 2014) Bhatia, Bandana; Sood, NehaThe network in which the users communicate with each other by forming a temporary network without any centralized administration is known as ad hoc network. Every node in ad hoc network acts both as a host as well as a router. The topology of these networks is highly deployable, dynamic and self-configurable. Because of the dynamic topology of Mobile Ad hoc Networks (MANETs), routing is an extremely challenging task in them. For ensuring reliable and efficient routing in MANETs, different routing protocols are defined. These routing protocols may follow proactive, reactive or hybrid approach. As many number of mobile nodes are transmitting the packets over the network, the chances of losing the packets over the network increases to a great extent due to link failures or may be due to congestion over the network because of large traffic flowing over the network. Also, when the size of data packets increases, it may lead to the congestion over the network which ultimately leads to the loss of packets. The existing routing protocols for MANETs do not support congestion control as they are not congestion adaptive. Many authors have proposed protocols based on Ad hoc On demand Distance Vector Routing Protocol (AODV) which are congestion adaptive and deal with the congestion over the network. This dissertation work discusses the congestion control protocols in MANETs and focuses on two congestion control protocols, AODV-I and EDAODV. Simulation results are gathered for AODV, AODV-I and EDAODV by varying the number of nodes and size of the data packets for four performance metrics, namely, routing overhead, throughput, end- to-end delay and packet delivery ratio (PDR).