Download or read book Routing and Quality of Service in Broadband LEO Satellite Networks written by Hoang Nam Nguyen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Routing and Quality-of-Service in Broadband LEO Satellite Networks describes mechanisms for supporting Quality-of-Service (QoS) strategies that consider properties of low earth orbit satellite networks and their effects on link handover. A graph model representing the dynamic topology of a satellite constellation is introduced based on a new parameter, lifetime. Novel routing and resource reservation algorithms as well as connection admission control strategies are proposed to minimize the handover blocking probability while maintaining QoS requirements. The author also discusses the roles of satellites in an all-IP mobile network architecture and the problems of mobility, QoS provisioning, and routing. This work will be of particular interest to researchers and professionals working on mobility networking in next generation networks.
Download or read book Routing and QoS in Broadband Low Earth Orbit Satellite Networks written by Hoang Nam Nguyen and published by . This book was released on 2002 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Satellite Network Robust QoS aware Routing written by Fei Long and published by Springer. This book was released on 2014-04-28 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Satellite Network Robust QoS-aware Routing presents a novel routing strategy for satellite networks. This strategy is useful for the design of multi-layered satellite networks as it can greatly reduce the number of time slots in one system cycle. The traffic prediction and engineering approaches make the system robust so that the traffic spikes can be handled effectively. The multi-QoS optimization routing algorithm can satisfy various potential user requirements. Clear and sufficient illustrations are also presented in the book. As the chapters cover the above topics independently, readers from different research backgrounds in constellation design, multi-QoS routing, and traffic engineering can benefit from the book. Fei Long is a senior engineer at Beijing R&D Center of 54th Research Institute of China Electronics Technology Group Corporation.
Download or read book Service Efficient Network Interconnection Via Satellite written by Y. Fun Hu and published by John Wiley & Sons. This book was released on 2002-01-21 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provide access to such facilities in developing regions of the world is also viable and particularly attractive in the short to mid-term. Private LAN connection facilities could also be made available to the corporate user, offering the possibility to establish broadband internet access within a closed user group. Such a scenario could be of interest to the financial sector. By gathering the knowledge and experiences of well-known satellite systems experts from different parts of Europe this comprehensive volume provides detailed analysis on technical aspects for interconnecting local area network using satellite. Starting from traffic source modelling for different types of applications and services to different types of transmission techniques and networking functions for supporting such services, different case studies are presented to analyse the performance of such technologies. By providing an insight to current and future developments in satellite communications systems and by covering a broad.
Download or read book Advanced Routing Protocols for Satellite and Space Networks written by Chao Chen and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Satellite systems have the advantage of global coverage and offer a solution for providing broadband access to end users. Local terrestrial networks and terminals can be connected to the rest of the world over Low Earth Orbit (LEO) satellite networks simply by installing small satellite interfaces. With these properties, satellite systems play a crucial role in the global Internet to support real-time and non-real-time applications. Routing in satellite networks, and the integration of satellite networks and the terrestrial Internet are the key issues to support these services. Furthermore, the developments in space technologies enable the realization of deep-space missions such as Mars exploration. The Interplanetary Internet is envisioned to provide communication services for scientific data delivery and navigation services for the explorer spacecrafts and orbiters of future deep-space missions. The unique characteristics posed by deep-space communications call for different research approaches from those in terrestrial networks. The objective of this research is to develop advanced architectures and efficient routing protocols for satellite and space networks to support applications with different traffic types and heterogeneous quality-of-service (QoS) requirements. Specifically, a new QoS-based routing algorithm (QRA) is proposed as a connection-oriented routing scheme to support real-time multimedia applications in satellite networks. Next, the satellite grouping and routing protocol (SGRP) is presented as a unicast routing protocol in a two-layer satellite IP network architecture. The border gateway protocol - satellite version (BGP-S) is then proposed as a unified routing protocol to accomplish the integration of the terrestrial and satellite IP networks at the network layer. Finally, a new routing framework, called the space backbone routing (SBR), is introduced for routing through different autonomous regions in the Interplanetary Internet. SBR provides a self-contained and scalable solution to support different traffic types through the Interplanetary Internet.
Download or read book Satellite Communications Network Design and Analysis written by Kenneth Y. Jo and published by Artech House. This book was released on 2011 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative book provides a thorough understanding of the fundamental concepts of satellite communications (SATCOM) network design and performance assessments. You find discussions on a wide class of SATCOM networks using satellites as core components, as well as coverage key applications in the field. This in-depth resource presents a broad range of critical topics, from geosynchronous Earth orbiting (GEO) satellites and direct broadcast satellite systems, to low Earth orbiting (LEO) satellites, radio standards and protocols.This invaluable reference explains the many specific uses of satellite networks, including small-terminal wireless and mobile communications systems. Moreover, this book presents advanced topics such as satellite RF link analyses, optimum transponder loading, on-board processing, antenna characteristics, protected systems, information assurance, and spread spectrums. You are introduced to current and future SATCOM systems and find details on their performance supportabilities. This cutting-edge book also presents trends in multimedia satellite applications and IP services over satellites.
Download or read book A Simulation Tool to Study Routing in Large Broadband Satellite Networks written by Benjamin Sky Kempton and published by . This book was released on 2020 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large, low Earth orbit, broadband satellite networks have recently become a growing area of research as a number of implementations are currently being constructed by commercial businesses. Unlike previous systems, these new constellations are comprised of 100’s to 1,000’s of interconnected satellites. This thesis project has resulted in a novel simulation toolthatenablesthestudyofinter-satellitelinkingmethodsinlargesatelliteconstellations: SImulator for Large LEO-Satellite Communication NetworkS (SILLEO-SCNS). Additionally, the thesis presents the analysis of several network designs and constellation structures, with regards to their routing performance. -- Abstract.
Download or read book Datagram Routing for Low Earth Orbit Satellite Networks written by Yurong Hu and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Datagram Routing for Low Earth Orbit Satellite Networks" by 胡玉蓉, Yurong, Hu, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3122444 Subjects: Artificial satellites - Orbits Artificial satellites in telecommunication Telecommunication - Traffic Computer networks
Download or read book Communications and Networking written by Honghao Gao and published by Springer Nature. This book was released on 2020-02-26 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two volume set constitutes the refereed proceedings of the 14th EAI International Conference on Communications and Networking, ChinaCom 2019, held in November/December 2019 in Shanghai, China. The 81 papers presented were carefully selected from 162 submissions. The papers are organized in topical sections on Internet of Things (IoT), antenna, microwave and cellular communication, wireless communications and networking, network and information security, communication QoS, reliability and modeling, pattern recognition and image signal processing, and information processing.
Download or read book Internet QoS written by Zheng Wang and published by Morgan Kaufmann. This book was released on 2001 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 The Big Picture -- 2 Integrated Services -- 3 Differentiated Services -- 4 Multiprotocol Label Switching -- 5 Internet Traffic Engineering.
Download or read book Space Information Networks written by Quan Yu and published by Springer. This book was released on 2017-04-05 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of the First International Conference on Space Information Network, SINC 2016, held in Kunming, China, in August 2016. The 18 full and 6 short papers presented in this volume were carefully reviewed and selected from 139 submissions.The theme of the conference encompasses new progress and development tendency of the space information network and related fields, There were 3 sections in the proceedings of SINC 2016 including the model of space information network and mechanism of high performance networking, theory and method of high speed transmission in space dynamic network, and sparse representation and fusion process in space information.
Download or read book Low Earth Orbit Satellite Communication Networks written by Philippe G. Daroux and published by . This book was released on 2000 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inter satellite Link Channel Management for Mobile Satellite Systems written by Angeline Anthony Dass and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Earth Orbit (LEO) satellite constellations are foreseen as appropriate alternatives to the geostationary satellite systems for providing global personal communications services (PCS). Compared to geostationary satellites, these constellations offer a significantly smaller round trip delay between earth and space segments. Furthermore, the use of inter-satellite links (ISLs) has been identified as a means to provide global connectivity in space, thereby enhancing system autonomy and flexibility, and has been retained in the design of systems like Teledesic and SkyBridge. From a network point of view, a major benefit of a ISL subnetwork in space lies in the possibility to transport long distance traffic over reliable and high capacity connections, thus forming a good base for ATM (asynchronous transfer mode) operation. With the development of the third generation (3G) and fourth generation (4G) wireless networks, A TM is regarded as one of the potential promising candidates for providing QoS guaranteed broadband telecommunication services. It is possible to integrate the mobile satellite and A TM by applying the inter/intra satellite links (ISLs) as the physical layer of W A TM and considering a connection between two satellites as a virtual path connection (VPC) in ATM. A handoff event will cause re-allocation on the affected ISL channel resources. As the increasing of the arrival rate of handoff calls, channel management becomes a very important issue in providing QoS. Methods to keep the frequency of handoff as low as possible, and how to alleviate the side-effects of handoff events on the whole network are very important in providing QoS promised service. A good routing scheme is always highly related to the happening of handoff events. In order to best utilize the network resource and provide better network QoS, a dynamic channel allocation scheme (DCAS) is considered, giving higher priority to handoff calls compared to new calls and real time traffic over non real time traffic. The higher priority traffic will have a larger probability to access a channel, while the lower priority traffic will have a.~smalier probability to obtain a channel. In this way, we give highest priority to the real time handoff calls, followed by the non real time handoff calls, then the real time new calls and lastly the non real time new calls. The channel access probability also depends on the mobility of call (handover call arrival rate over the new call arrival rate) and the channel resources. A suitable routing method was used based on the Modified Dijkstra Shortest Path algorithm. For an efficient channel management scheme, the dynamic channel allocation and shortest path routing methods are combined. The new channel management scheme allows the higher priority call to obtain a larger call acceptance probability and utilize the shortest path, while the lower priority call will have a smaller call acceptance probability and utilize the longer routes. The network performance is measured from its end-to-end delay, new call blocking probability, and handoff call blocking probability. The new channel management scheme improves the utilization of the network resources by reducing the handover call blocking probability while guaranteeing a certain quality of service for the new call blocking probability.
Download or read book Performance Analysis of Dynamic Routing Protocols in a Low Earth Orbit Satellite Data Network written by Richard F. Janoso and published by . This book was released on 1996-12-01 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern warfare is placing an increasing reliance on global communications. Currently under development are several Low Earth Orbit (LEO) satellite systems that propose to deliver voice and data traffic to subscribers anywhere on the globe. However, very little is known about the performance of conventional routing protocols under orbital conditions where the topology changes on a scale of minutes rather than days. This thesis compares two routing protocols in a LEO environment. One (Extended Bellman-Ford) is a conventional terrestrial routing protocol, while the other (Darting) is a new protocol which has been proposed as suitable for use in LEO networks. These protocols are compared via computer simulation in two of the proposed LEO systems (Globalstar and Iridium), under various traffic intensities. Comparative measures of packet delay, convergence speed, and protocol overhead are made It was found both protocols were roughly equivalent in end-to-end delay characteristics, though the Darting protocol had a much higher overhead load and demonstrated higher instability at network update periods. For example, while steady state end-to- end delays were within a few milliseconds, in one case Darting showed an increase of 764% in convergence time over Extended Bellman-Ford with an increase of 149% in overhead. Over all cases, Darting required an average of 72.1% more overhead than Extended Bellman-Ford to perform the same work. Darting was handicapped by its strong correlation between data traffic and protocol overhead. Modifications to reduce this overhead would result in much closer performance.
Download or read book Security of Mobile Communications written by Noureddine Boudriga and published by CRC Press. This book was released on 2009-07-27 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: This innovative resource provides comprehensive coverage of the policies, practices, and guidelines needed to address the security issues related to today's wireless sensor networks, satellite services, mobile e-services, and inter-system roaming and interconnecting systems. It details the major mobile standards for securing mobile communications and examines architectures that can provide data confidentiality, authentication, integrity, and privacy in various wireless environments. The book defines the roles and responsibilities that network operators, service providers, and even customers need to fulfill to assure mobile communications are as secure as they are prolific.
Download or read book Pervasive Computing and the Networked World written by Qiaohong Zu and published by Springer. This book was released on 2013-03-14 with total page 939 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed post-proceedings of the Joint International Conference on Pervasive Computing and the Networked World, ICPCA-SWS 2012, held in Istanbul, Turkey, in November 2012. This conference is a merger of the 7th International Conference on Pervasive Computing and Applications (ICPCA) and the 4th Symposium on Web Society (SWS). The 53 revised full papers and 26 short papers presented were carefully reviewed and selected from 143 submissions. The papers cover a wide range of topics from different research communities such as computer science, sociology and psychology and explore both theoretical and practical issues in and around the emerging computing paradigms, e.g., pervasive collaboration, collaborative business, and networked societies. They highlight the unique characteristics of the "everywhere" computing paradigm and promote the awareness of its potential social and psychological consequences.
Download or read book Congestion Control and Routing Over Satellite Networks written by Jinhua Cao and published by . This book was released on 2010 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Satellite networks and transmissions find their application in fields of computer communications, telephone communications, television broadcasting, transportation, space situational awareness systems and so on. This thesis mainly focuses on two networking issues affecting satellite networking: network congestion control and network routing optimization. Congestion, which leads to long queueing delays, packet losses or both, is a networking problem that has drawn the attention of many researchers. The goal of congestion control mechanisms is to ensure high bandwidth utilization while avoiding network congestion by regulating the rate at which traffic sources inject packets into a network. In this thesis, we propose a stable congestion controller using data-driven, safe switching control theory to improve the dynamic performance of satellite Transmission Control Protocol/Active Queue Management (TCP/AQM) networks. First, the stable region of the Proportional-Integral (PI) parameters for a nominal model is explored. Then, a PI controller, whose parameters are adaptively tuned by switching among members of a given candidate set, using observed plant data, is presented and compared with some classical AQM policy examples, such as Random Early Detection (RED) and fixed PI control. A new cost detectable switching law with an interval cost function switching algorithm, which improves the performance and also saves the computational cost, is developed and compared with a law commonly used in the switching control literature. Finite-gain stability of the system is proved. A fuzzy logic PI controller is incorporated as a special candidate to achieve good performance at all nominal points with the available set of candidate controllers. Simulations are presented to validate the theory. An effocient routing algorithm plays a key role in optimizing network resources. In this thesis, we briefly analyze Low Earth Orbit (LEO) satellite networks, review the Cross Entropy (CE) method and then develop a novel on-demand routing system named Cross Entropy Accelerated Ant Routing System (CEAARS) for regular constellation LEO satellite networks. By implementing simulations on an Iridium-like satellite network, we compare the proposed CEAARS algorithm with the two approaches to adaptive routing protocols on the Internet: distance-vector (DV) and link-state (LS), as well as with the original Cross Entropy Ant Routing System (CEARS). DV algorithms are based on distributed Bellman Ford algorithm, and LS algorithms are implementation of Dijkstras single source shortest path. The results show that CEAARS not only remarkably improves the convergence speed of achieving optimal or suboptimal paths, but also reduces the number of overhead ants (management packets).
