Department of Computer Science and Information Systems

Permanent URI for this collectionhttp://localhost:4000/handle/123456789/1928

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Start date: 2000End date: 2009

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Now showing 1 - 10 of 44
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    A DHCPv6 Based IPv6 Autoconfiguration Mechanism for Subordinate MANET
    (IEEE, 2008) Bhatia, Ashutosh
    In order to communicate among themselves and with the devices on the Internet, a Mobile Ad-hoc NETwork (MANET) node needs to configure its interface(s) with IP address(es). MANET is a multi-hop network often consisting of mobile devices such as mobile phones, PDAs, laptops with wireless interface(s). Due to some of the MANET inherent characteristics such as mobility, multi-hop and ad hoc, manual configuration of IP address(es)/prefix(es) is not desirable and practical. The Dynamic Host Configuration Protocol version 6 (DHCPv6) is Internet Engineering Task Force defined standard mechanism to autoconfigure IPv6 address in a stateful manner. This paper discusses subordinate MANET scenario and applicability of DHCPv6 in such scenario. The paper then proposes a novel approach to dynamically configure DHCPv6 relay agents in order to make DHCPv6 message exchange possible between MANET nodes DHCPv6 clients) and DHCPv6 server ensuring minimal control overhead. Proposed solution facilitates seamless integration of MANET with the Internet. Operation of the relay agent is kept transparent to the client and server as required by the DHCPv6 specification. The optimization helps to reduce configuration latency and signal overhead. The proposed mechanism is evaluated and analyzed using ns-2.31 over IEEE 802.11 MAC/PHY layer and Ad-hoc On-demand Distance Vector routing protocol.
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    A Distributed Prefix Allocation Scheme for Subordinate MANET
    (IEEE, 2008) Bhatia, Ashutosh
    Routers are normally manually configured with IPv6 prefixes in the traditional network. However, due to some of the MANET inherent characteristics such as multi-hop, ad hoc and mobility, manual configuration of prefixes is not desirable and practical. Rather than relying on a dedicated server, a distributed way of allocation is more suitable in the MANET environment. In this paper, we propose a distributed scheme to allocate globally routable and topologically correct IPv6 prefix(es) to MANET routers. The allocated prefixes can then be used for address autoconfiguration of MANET router interface(s) and any associated hosts using IETF defined IPv6 stateless address autoconfiguration mechanism. Proposed scheme is implemented using ns-2.31. Simulation results for protocol signal overhead and configuration latency has been analyzed in detail.
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    A cluster based minimum battery cost AODV routing using multipath route for zigbee
    (IEEE, 2008) Bhatia, Ashutosh
    IEEE 802.15.4 standard is uniquely designed for low data rate wireless personal area networks (LR-WPANs). The IEEE 802.15.4 targets the applications such as industrial, agricultural, vehicular, residential, medical sensors and actuators which have more relaxed throughput requirements. ZigBee is a wireless technology based on IEEE 802.15.4. ZigBee routing uses ad hoc on-demand distance vector (AODV) routing protocol. In this paper we present an improved version of AODV called multipath energy aware AODV routing (ME-AODV), which utilizes the topology of network to divide it into one or more logical clusters and restricts the flooding of route request outside the cluster. The mesh links created at the time of cluster formation are used to decrease the routing path. ME-AODV uses nodes of the same cluster to share routing information, which significantly reduces the route path discovery. Since ZigBee routing is based on shortest-hop count, which causes overuse of a small set of nodes hence decreasing node as well as network lifetime. We also propose a mix of ad hoc on-demand multipath distance vector routing (AOMDV) and minimal-battery cost routing (MBCR) as an extension to AODV to increase the lifetime of network. The simulations have been performed using IEEE 802.15.4, ns-2 module.
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    Statistical Timing for Parametric Yield Prediction of Digital Integrated Circuits
    (IEEE, 2006) Naidu, S.R.
    Uncertainty in circuit performance due to manufacturing and environmental variations is increasing with each new generation of technology. It is therefore important to predict the performance of a chip as a probabilistic quantity. This paper proposes three novel path-based algorithms for statistical timing analysis and parametric yield prediction of digital integrated circuits. The methods have been implemented in the context of the EinsTimer static timing analyzer. The three methods are complementary in that they are designed to target different process variation conditions that occur in practice. Numerical results are presented to study the strengths and weaknesses of these complementary approaches. Timing analysis results in the face of statistical temperature and V dd variations are presented on an industrial ASIC part on which a bounded timing methodology leads to surprisingly wrong results
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    Speeding up Monte-Carlo Simulation for Statistical Timing Analysis of Digital Integrated Circuits
    (IEEE, 2007) Naidu, S.R.
    This paper presents a pair of novel techniques to speed-up path-based Monte-Carlo simulation for statistical timing analysis of digital integrated circuits with no loss of accuracy. The presented techniques can be used in isolation or they could be used together. Both techniques can be readily implemented in any statistical timing framework. We compare our proposed Monte-Carlo simulation with traditional Monte-Carlo simulation in a rigorous framework and show that the new method is up to 2 times as efficient as the traditional method
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    ATM Networks: Concepts and Protocols
    (McGraw Hill, 2006) Narang, Nishit
    Networking technologies are playing a pivotal role in ‘networking’ our world. Among the networking technologies that are relevant today, ATM is one of the most popular and pervasive as it seamlessly integrates local area networks and wide area networks. Further, as it provides a single platform for voice, video and data, it facilitates convergence. ATM Networks: Concepts and Protocols is a single-stop reference on this technology. The revised edition of this book covers the relevant concepts, the three layers of ATM protocol reference model, core concepts of ATM networks (including signaling, routing and traffic management), interworking aspects and the application of ATM networks.
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    2.5G MOBILE NETWORKS: GPRS and EDGE
    (McGraw Hill, 2008) Narang, Nishit
    his book culminates the trilogy of books written by Sumit Kasera and Nishit Narang on three key wireless technologies "2G. 2.5G and 3G Mobile Networks. Even though 2G and 2.5G technologies, as compared to 3G, are more than a decade old, the current corporate battle for 2G spectrum in India, indicates the significance and growth potential of these technologies including GSM and GPRS. 2.5G Mobile Networks is a complete coverage of GPRS and EDGE concepts presented in simple non-technical language without complex mathematics. An ideal primer for those working in or studying networking technologies, this book focuses mainly on procedures and basis of signaling exchanges. Readers will find a detailed treatment on GPRS network architecture, a healthy mix of concepts and protocols of Air Interface and Core Network, discussion on GPRS user-plane aspects with focus on user-plane protocols, important aspects of EDGE and much more. This book will be a valuable guide to both engineers as well as students working on GPRS and EDGE. It will also be a great follow up for those will knowledge on GSM and want to know more on the intermediate technologies before studying 3G UMTS.
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    2G Mobile Networks Gsm & Hscsd
    (McGraw Hill, 2007) Narang, Nishit
    Readers will gain a thorough and quick understanding of GSM networks-from air interface to core network and the available services. The book provides an exhaustive coverage of protocol architecture and procedures, including radio resource and mobility management, as well as call handling. It begins by laying down the fundamentals of GSM technology ? cellular concepts, network and protocol architecture of GSM. This is followed by a discussion of GSM air interface that covers important topics including GSM frame hierarchy, burst structure, physical and logical channels. The discussion then moves onto the three logical parts of any basic wireless architecture-Mobile Station, Access and Core Networks. Important procedures of access and core networks are discussed next. The book ends with discussions of service aspects of GSM networks. These include voice transfer, SMS, cell broadcast service, location services and finally circuit switched data, and the more advanced high-speed circuit switched data. About The Author: Nishit Narang is Senior Technical Leader at Flextronics Software Systems India. He has a B. Tech. degree in Computer Science and Engineering from IIT, Delhi, India, and an M.S degree in Software Systems from Birla Institute of Technology and Science, Pilani, India. Nishit's current areas of interest include software development for GSM, GPRS and 3G networks & Sumit Kasera is Senior Technical Leader at Flextronics Software Systems (formerly Hughes Software Systems), India. He has a B. Tech degree in Computer Science and Engineering from IIT, Kharagpur, India and an M.S degree in Software Systems from Birla Institute of Technology and Science, Pilani, India. Table of Contents Part I: GSM Introduction and Background 1. GSM Overview 2. GSM Air Interface Part II: GSM Network Architecture 3.
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    Communication Networks: Principles and Practice
    (2005) Narang, Nishit
    Communication Networks: Principles and Practice is a simple and jargon-free presentation on the core concepts of networking. The book adopts a novel approach, wherein each chapter first details a particular concept of networking and then explains it using examples from contemporary technologies like TCP/IP, ATM, 3G Networks, etc.
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    3G Mobile Networks: Architecture, Protocols and Procedures
    (McGraw Hill, 2004) Narang, Nishit
    In India, the mobile subscriber baser is increasing at a phenomenal rate. After the successful adoption of Second Generation (2G) Technology GSM and 2.5G Technology GPRS, the industry is now rapidly moving towards Third Generation (3G) Networks. The book, written by two young engineers, touches almost every imaginable aspect of a 3G Network, spanning across topics such as: • UMTS Network Architecture (including Access Network and Core Network), • Protocols (including RRC, NBAP, RANAP, MM/GMM, MAP and GTP), • Procedures (including UTRAN Procedures, Mobility Management, Call/Session handling and Security Management), and • Services (including Supplementary Services and Value-added Services). Also the book covers topics like IP Multimedia Sub-system (IMS) and SIGTRAN. Besides these, the book includes the status of deployment of 3G UMTS Networks across the world and provides a brief introduction to 4G Networks setting the tone for future advancements. With this coverage, the book would serve the needs of telecom engineers and students.