Structured Routing and Performance Evaluation of Manets Protocols in Wsn


Book Description

This book presents ScatterDHT, a routing overlay explicitly designed for WSNs. ScatterDHT exploits the P2P functionality features and applies them over the ScatterWeb sensor nodes. The first part of this book describes the ScatterDHT overlay routing and figures out the performance evaluation of the implemented prototype. The second part gives a detailed study of performance evaluation of two MANETs proactive routing protocols (B.A.T.M.A.N and OLSR) over the WSN. This work has been achieved to give a comprehensive performance evaluation on the characteristics of the chosen routing protocols. Results show that ScatterDHT outperforms the other protocols considering a few important metrics in the wireless sensor network. It has a higher delivery ratio than B.A.T.M.A.N and OLSR for all network sizes (5 Nodes, 10 Nodes, 50 Nodes, 100 Nodes, 200 Nodes). It also outperforms the other protocols regarding the metric Control Traffic Overhead. The most important metric where Scatter-DHT outperforms other ones, is the energy consumption. Since the control traffic overhead generated by ScatterDHT is less than others, it is obvious that it requires less energy consumption.







Evaluation of Manet Routing Protocols in Realistic Environments


Book Description

Recently, many researchers have become interested in MANET (Mobile Ad-hoc NETworks) to create a self-configurable network without an existing communication infrastructure. This type of networks could be widely deployed in our society for inter-vehicle communication, rescue operations or entertaining applications. One of the most important points in a MANET is to decide the best routing protocol to handle its applications. The performances of a routing protocol are strongly connected with the environmental characteristics making its choice a challenging task. In this research, the results of a detailed performance evaluation on several MANET routing protocols working under realistic environments are presented. The routing protocols, mobility models and other aspects are explained and discussed in order to accurately use them to represent real-life conditions.




New Methodologies for Performance Modeling of Routing Protocols in Wireless Networks


Book Description

Mobile wireless ad-hoc networks (MANETs) are being designed to be a key element in future battlefield communications, as well as a supplement to cellular networks. As a consequence of rapid changes in the topology of the network, routing packets in MANETs is a challenging task that has attracted considerable attention. However a comprehensive performance evaluation of routing protocols remains an open problem. This dissertation proposes a novel methodology for the performance evaluation of routing protocols for MANETs. The method is based on a "Divide and Conquer" approach and it provides a systematic and disciplined way to evaluate the performance of routing protocols. The full routing system is decomposed into components (subsystems). Performance models are developed for each component. Then, the performance model of the full system is the interconnection of the performance models of the components. The component based approach makes practical the performance evaluation of routing protocols, by allowing researchers to reuse a subset of the previous developed models to evaluate the performance of new ideas.




Performance Analysis of Mobile Ad Hoc Networking Routing Protocols


Book Description

This thesis presents a simulation and performance evaluation analysis of the various routing protocols that have been proposed for the Mobile Ad Hoc Network (MANET) environment using the Network Simulator-2 (NS-2) tool. Many routing protocols have been proposed by the academic communities for possible practical implementation of a MANET in military, governmental and commercial environments. Four (4) such routing protocols were chosen for analysis and evaluation: Ad Hoc On-demand Distance Vector routing (AODV), Dynamic Source Routing (DSR), Destination-Sequenced Distance Vector routing (DSDV) and Optimized Link State Routing (OLSR). NS-2 is developed and maintained by the University of Southern California's Information Sciences Institute (ISI). Leveraging on NS-2 s simulation capabilities, the key performance indicators of the routing protocols were analyzed such as data network throughput, routing overhead generation, data delivery delay as well as energy efficiency or optimization. The last metric is explored, especially due to its relevance to the mobile environment. Energy is a scare commodity in a mobile ad hoc environment. Any routing software that attempts to minimize energy usage will prolong the livelihood of the devices used in the battlefield. Three important mobility models are considered, namely, Random Waypoint, Manhattan Grid, and Reference Point Group Mobility. The application of these three models will enhance the realism of simulation to actual real life mobility in an urban or military setup scenario. The performance of the routing protocols in varied node density, mobility speed as well as loading conditions have been studied. The results of the simulation will provide invaluable insights to the performance of the selected routing protocols. This can serve as a deciding factor for the U.S. Department of Defense (DoD) in their selection of the most suitable routing protocols tailored to their specific needs.










A Performance Analysis of Routing Protocols for Ad-hoc Networks


Book Description

A mobile ad-hoc network (MANET) is an autonomous system of mobile nodes connected by wireless links. The performance of MANET is related to the efficiency of the routing protocols in adapting to frequently changing network topology and link status. This thesis addresses the issue by comparing the relative performance of three key ad-hoc routing protocols: Destination-sequenced Distance Vector (DSDV), Ad-hoc On-demand Distance Vector (AODV) and Optimized Link State Routing (OLSR). The protocols are tested based on two scenarios, namely, tactical networks for ships and sensor-based network nodes. The objective is to validate the scalability and effectiveness of the protocols. Four performance metrics were measured by varying the maximum speed of mobile hosts, network size and traffic load, to assess the routing capability and protocol efficiency. The simulation results indicate that AODV performs better than OSLR and DSDV in the first scenario. Although OLSR also performed relatively well, the associated high routing overhead is the dominant reason for not choosing it. On the other hand, OLSR emerged as the protocol of choice for sensor networks, where the high routing overhead is counteracted by consistently better performance in all other metrics. Due to the slow evolution of the sensor network topology, OLSR performed satisfactorily for best effort traffic but needed subtle adjustments to balance between latency and bandwidth to meet the requirements of delay-sensitive applications. Lastly, default parameters of OLSR were tweaked and recommendations were made with results that showed promising ways to further improve the performance of OLSR in sensor networks, albeit not as significantly as in the tactical networks for the ship case.







Mobile Ad Hoc Networks


Book Description

In recent years, a lot of work has been done in an effort to incorporate Swarm Intelligence (SI) techniques in building an adaptive routing protocol for Mobile Ad Hoc Networks (MANETs). Since centralized approach for routing in MANETs generally lacks in scalability and fault-tolerance, SI techniques provide a natural solution through a distributed approach for the adaptive routing for MANETs. In SI techniques, the captivating features of insects or mammals are correlated with the real world problems to find solutions. Recently, several applications of bio-inspired and nature-inspired algorithms in telecommunications and computer networks have achieved remarkable success. The main aims/objectives of this book, "Mobile Ad Hoc Networks: Bio-Inspired Quality of Service Aware Routing Protocols", are twofold; firstly it clearly distinguishes between principles of traditional routing protocols and SI based routing protocols, while explaining in detail the analogy between MANETs and SI principles. Secondly, it presents the readers with important Quality of Service (QoS) parameters and explains how SI based routing protocols achieves QoS demands of the applications. This book also gives quantitative and qualitative analysis of some of the SI based routing protocols for MANETs.