Information Dissemination And Routing In Communication Networks

Information Dissemination and Routing in Communication Networks

Abstract: Communication networks can be either infrastructure-based or infrastructure-less. Information dissemination and routing are two important research areas in networking, as the first is one of the ultimate goals forconstructing a network and the second provides the underlying support for disseminating information among nodes within the network. This dissertation presents three major research results, with the first falling into the category of information dissemination on the Internet, specifically, server replica placement, and the second and the third into the category of information dissemination and routing in wireless ad hoc networks, respectively. The World Wide Web is a popular mechanism that creates a client-server information sharing model to facilitate information dissemination across the Internet. With the explosive growth of the WWW, popular Web sites experience increasingly heavy workloads and a large percentage of Internet traffic. To alleviate the workload and the network traffic, these sites usually place a set of servers geographically distributed across the Internet and replicate their contents to the selected replicas. The server replica placement scheme addresses the problem of properly placing a set of replicas among sets of candidate sites to optimize system performance gain. More specifically, using an optimum replica placement algorithm, we study the relationship between the replica size and the optimized performance gain through a trace-driven simulation. We also perform a parametric study to find out the effect of client demand patterns on the optimized performance gain growth. The field of wireless ad hoc networks has become a prosperous research field in recent years thanks to the rapid development and popularity of various mobile devices. The lack of infrastructure allows a fast and inexpensive deployment of wireless ad hoc networks and, thus, makes them suitable for surveillance applications. However, the ad hoc networks' flexibility and convenience do come at a price. The infamous characteristics of these networks, such as unstable wireless media, dynamic network topology due to link disruptions and node mobility, and power constrained wireless devices, require protocols designed for these networks to be fully distributed, energy efficient, fault (disruption) tolerant, and scalable. Following these design rules, we propose Scalable Data Storage and Retrieval Service (SDSR), to enhance data dissemination for large-scale wireless ad hoc networks, and Disruption Tolerant Geographic Routing protocol (DTGR) to enhance the performance of geographic routing schemes in the presence of frequently occurring disruptions for wireless ad hoc networks.

NBS Special Publication

Principles of Data Transfer Through Communications Networks, the Internet, and Autonomous Mobiles

Understand the principles and practical basis of global telecommunications and data communications networks with this essential text. Our increasingly connected world is more reliant than ever on data transport and the communication networking technologies of the moment. Ever-expanding wireless communications and the Internet of Things have brought connectivity into more areas of our lives than ever before. Virtually every workplace and industry is now reliant at some level on data transfer. Principles of Data Transfer through Communications Networks, the Internet, and Autonomous Mobiles offers a comprehensive yet accessible overview of the principles and methods of computer communications and mobile wireless network systems. It's designed to equip a vast range of students and professionals with the necessary toolkit to manage data flows between and across network systems at various scales. Drawing upon decades of teaching and practical experience, it's a must-own resource for anyone looking to understand the core mechanics that power our world of mass communications. Readers will also find: Coverage of cutting-edge technologies such as autonomous vehicular highways that draw upon novel communications technologies Detailed discussion of design and performance behavior for major communication networking technologies Treatment designed for readers with no prior knowledge of computer science or programming Principles of Data Transfer through Communications Networks, the Internet, and Autonomous Mobiles is ideal for students in data communications, telecommunications and wireless networking technology courses, as well as professionals working in data communications industries or those who make use of data transfer communications networks as part of their work.