Download or read book A Performance Evaluation of Nack Oriented Protocols as the Foundation of Reliable Delay Tolerant Networking Convergence Layers written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-20 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Delay-Tolerant Networking (DTN) is an active area of research in the space communications community. DTN uses a standard layered approach with the Bundle Protocol operating on top of transport layer protocols known as convergence layers that actually transmit the data between nodes. Several different common transport layer protocols have been implemented as convergence layers in DTN implementations including User Datagram Protocol (UDP), Transmission Control Protocol (TCP), and Licklider Transmission Protocol (LTP). The purpose of this paper is to evaluate several stand-alone implementations of negative-acknowledgment based transport layer protocols to determine how they perform in a variety of different link conditions. The transport protocols chosen for this evaluation include Consultative Committee for Space Data Systems (CCSDS) File Delivery Protocol (CFDP), Licklider Transmission Protocol (LTP), NACK-Oriented Reliable Multicast (NORM), and Saratoga. The test parameters that the protocols were subjected to are characteristic of common communications links ranging from terrestrial to cis-lunar and apply different levels of delay, line rate, and error. Iannicca, Dennis and Hylton, Alan and Ishac, Joseph Glenn Research Center COMMUNICATION NETWORKS; SPACE COMMUNICATION; AEROSPACE SYSTEMS; PROTOCOL (COMPUTERS); OBJECT-ORIENTED PROGRAMMING; DELAY LINES; ERRORS; PERFORMANCE TESTS; DATA SYSTEMS; CONVERGENCE; BUNDLES; EVALUATION

Download or read book A Performance Evaluation of Nack Oriented Protocols As the Foundation of Reliable Delay Tolerant Networking Convergence Layers written by Nasa Technical Reports Server (Ntrs) and published by BiblioGov. This book was released on 2013-06 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Delay-Tolerant Networking (DTN) is an active area of research in the space communications community. DTN uses a standard layered approach with the Bundle Protocol operating on top of transport layer protocols known as convergence layers that actually transmit the data between nodes. Several different common transport layer protocols have been implemented as convergence layers in DTN implementations including User Datagram Protocol (UDP), Transmission Control Protocol (TCP), and Licklider Transmission Protocol (LTP). The purpose of this paper is to evaluate several stand-alone implementations of negative-acknowledgment based transport layer protocols to determine how they perform in a variety of different link conditions. The transport protocols chosen for this evaluation include Consultative Committee for Space Data Systems (CCSDS) File Delivery Protocol (CFDP), Licklider Transmission Protocol (LTP), NACK-Oriented Reliable Multicast (NORM), and Saratoga. The test parameters that the protocols were subjected to are characteristic of common communications links ranging from terrestrial to cis-lunar and apply different levels of delay, line rate, and error.

Download or read book A performance evaluation of NACK oriented protocols as the foundation of reliable Delay Tolerant Networking convergence layers written by Dennis Iannicca and published by . This book was released on 2012 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer Networks written by Piotr Gaj and published by Springer Nature. This book was released on 2020-06-18 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the thoroughly refereed proceedings of the 27th International Conference on Computer Networks, CN 2020, held in June 2020. Due to the COVID-19 pandemic the conference was held virtually. The 14 full papers presented were carefully reviewed and selected from 34 submissions. They are organized according to the topical sections on computer networks; cybersecurity and quality of service; queueing theory and queueing networks.

Download or read book Experimental Evaluation of Convergence Layers in Delay Tolerant Networks written by Sukanti Nayak and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditional Internet protocols like TCP/IP and UDP/IP are not designed to perform efficiently in Delay Tolerant Networks (DTN) environments that operate in environments with high delays, significant losses, and intermittent connectivity. DTN uses the Bundle Protocol (BP) in the Bundle layer for storing and forwarding data units to deal with the absence of an end to end connection. Since BP is an overlay protocol that can be used above different transport layer protocols, the corresponding convergence layer protocol needs to be used to allow data flow from BP to the transport protocol and vice versa. The convergence layer enhances the underlying transport protocol by adding services like reliable delivery and message boundaries and some additional functionality to the transport layer protocol that makes it suitable to function in extreme environments. This Thesis work focuses on the performance evaluation of the Licklider Transmission Protocol (LTP) convergence layer running over Datagram Congestion Control Protocol (DCCP) under various realistic DTN conditions. The performance comparison of LTPCL/DCCP with other convergence Layers such as LTPCL/UDP and TCPCL/TCP is also performed. Tests are conducted enabling communication between Nodes using LTP over UDP and LTP over DCCP and TCPCL over TCP protocol. The discussion of different metrics, such as Throughput and File Delivery Time (FDT) of these convergence layer protocols under various Bit Error Rates (BER), propagation delays and link disruption are also examined.

Download or read book Delay Tolerant Networks written by Athanasios V. Vasilakos and published by CRC Press. This book was released on 2016-04-19 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: A class of Delay Tolerant Networks (DTN), which may violate one or more of the assumptions regarding the overall performance characteristics of the underlying links in order to achieve smooth operation, is rapidly growing in importance but may not be well served by the current end-to-end TCP/IP model. Delay Tolerant Networks: Protocols and Applicat

Download or read book Performance Characteristics of Convergence Layers in Delay Tolerant Networks written by Mithun Roy Rajan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Evaluation of the Cache and Forward Link Layer Protocol in Multihop Wireless Subnetworks written by and published by . This book was released on 2008 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cache aNd Forward (CNF) is a clean-slate protocol architecture for content delivery services in the future Internet. CNF is based on the concept of store-and-forward routers with large storage, providing for opportunistic delivery to occasionally disconnected mobile users and for in-network caching of content. This thesis presents the design and evaluation of a reliable link layer protocol for CNF in context of a multi-hop wireless access network scenario. The design aims to deliver files efficiently on a hop-by-hop basis as opposed to an end-to-end approach employed by TCP/IP. CNF leverages in-network storage to store an entire file before forwarding the file to the next node. If a next hop is not currently available or has low transmission quality, files may be stored at each CNF router along the path towards the destination. In addition to the link layer protocol, end-to-end transport in CNF involves packet scheduling and routing at each network node based on cross-layer observation of link speed, MAC congestion, path length, etc. An ns-2 simulation model has been developed for a multi-hop 802.11 access network with CNF routers and a reliable link layer protocol. Baseline results for first-come-first-serve (FCFS) scheduling and shortest path routing show significant capacity gains for CNF relative to TCP for a variety of network topologies and channel models. For example, for a 49 node network with a grid topology, maximum achievable throughput with CNF was found to be 12.5 Mbps as compared to 3.9 Mbps for TCP for a scenario in which the radio links experience short-term outages with a 5% duty cycle. Preliminary results showing the value of simple cross-layer scheduling in CNF are also given in the conclusion.

Download or read book Experimental Evaluation of Delay Tolerant Networking DTN Protocols for Cislunar Communications with Link Disruption written by Xuan Wu and published by . This book was released on 2008 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Network World written by and published by . This book was released on 1993-09-27 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 20 years, Network World has been the premier provider of information, intelligence and insight for network and IT executives responsible for the digital nervous systems of large organizations. Readers are responsible for designing, implementing and managing the voice, data and video systems their companies use to support everything from business critical applications to employee collaboration and electronic commerce.

Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1973-10 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.

Download or read book Computer Networks written by Andrew S. Tanenbaum and published by Prentice Hall. This book was released on 2019-02 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer Networks written by Andrew S. Tanenbaum and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition reflects the latest networking technologies with a special emphasis on wireless networking, including 802.11, 802.16, Bluetooth, and 3G cellular, paired with fixed-network coverage of ADSL, Internet over cable, gigabit Ethernet, MPLS, and peer-to-peer networks. It incorporates new coverage on 3G mobile phone networks, Fiber to the Home, RFID, delay-tolerant networks, and 802.11 security, in addition to expanded material on Internet routing, multicasting, congestion control, quality of service, real-time transport, and content distribution.

Download or read book Documentation Abstracts written by and published by . This book was released on 1991 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer Networking written by James F. Kurose and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Welcome to the eighth edition of Computer Networking: A Top-Down Approach. Since the publication of the first edition 20 years ago, our book has been adopted for use at many hundreds of colleges and universities, translated into 14 languages, and used by over one hundred thousand students and practitioners worldwide. We ve heard from many of these readers and have been overwhelmed by the positive response"--

Download or read book Converging Technologies for Improving Human Performance written by Mihail C. Roco and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: M. C. Roco and W.S. Bainbridge In the early decades of the 21st century, concentrated efforts can unify science based on the unity of nature, thereby advancing the combination of nanotechnology, biotechnology, information technology, and new technologies based in cognitive science. With proper attention to ethical issues and societal needs, converging in human abilities, societal technologies could achieve a tremendous improvement outcomes, the nation's productivity, and the quality of life. This is a broad, cross cutting, emerging and timely opportunity of interest to individuals, society and humanity in the long term. The phrase "convergent technologies" refers to the synergistic combination of four major "NBIC" (nano-bio-info-cogno) provinces of science and technology, each of which is currently progressing at a rapid rate: (a) nanoscience and nanotechnology; (b) biotechnology and biomedicine, including genetic engineering; (c) information technology, including advanced computing and communications; (d) cognitive science, including cognitive neuroscience. Timely and Broad Opportunity. Convergence of diverse technologies is based on material unity at the nanoscale and on technology integration from that scale.

Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1973-10 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.