15 research outputs found

    Packet-switched voice and its application to integrated voice / data networks

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    Imperial Users onl

    Queue Distribution of Real Time Transportation of Voice over Ip

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    Electrical Engineerin

    Real-time communication in packet-switched networks

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    Real-Time Communication in Packet-Switched Networks

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    Abstract The dramatically increased bandwidths and processing capabilities of future high-speed networks make possible many distributed real-time applications, such as sensor-based applications and multimedia services. Since these applications will have tra c characteristics and performance requirements that di er dramatically from those of current data-oriented applications, new communication network architectures and protocols will be required. In this paper we discuss the performance requirements and tra c characteristics of various real-time applications, survey recent developments in the areas of network architecture and protocols for supporting real-time services, and develop frameworks in which these, and future, research e orts can be considered

    Routing and switching in teleconferencing networks.

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    Leung, Yiu-Wing.Thesis (Ph.D.)--Chinese University of Hong Kong, 1992.Includes bibliographical references (leaves 150-157).AcknowledgmentsAbstractChapter Chapter 1 --- Introduction --- p.1Chapter 1.1 --- Background --- p.1Chapter 1.2 --- Broadband Video Services --- p.1Chapter 1.3 --- Videoconference Services --- p.7Chapter 1.4 --- Videoconference Systems --- p.8Chapter 1.5 --- Chapter Summary and Thesis Organization --- p.18Chapter Chapter 2 --- Efficient Algorithms for Multiple Destinations Routing --- p.20Chapter 2.1 --- Background --- p.20Chapter 2.2 --- Integer Programming Formulation of the MDR Problem --- p.26Chapter 2.3 --- Heuristics for Multiple Destinations Routing --- p.27Chapter 2.4 --- Performance Comparisons --- p.40Chapter 2.5 --- Chapter Summary --- p.50Chapter Chapter 3 --- Connection Optimization for Two Types of Videoconferences --- p.51Chapter 3.1 --- Background --- p.51Chapter 3.2 --- The Videoconference Services --- p.52Chapter 3.3 --- Connection Optimization --- p.54Chapter 3.4 --- Performance Analysis --- p.62Chapter 3.5 --- Chapter Summary --- p.80Chapter Chapter 4 --- A TDM-based Multibus Packet Switch --- p.81Chapter 4.1 --- Background --- p.81Chapter 4.2 --- Architecture of the Multibus Switch --- p.89Chapter 4.3 --- Operation of the Multibus Switch --- p.93Chapter 4.4 --- Performance Analysis --- p.95Chapter 4.5 --- Numerical Results --- p.106Chapter 4.6 --- Discussions --- p.109Chapter 4.7 --- Chapter Summary --- p.113Chapter Chapter 5 --- A Modular Shared Media Video Switch --- p.114Chapter 5.1 --- System Architecture and Operation --- p.114Chapter 5.2 --- Slot Assignment for Point-to-Point Transmissions --- p.129Chapter 5.3 --- Slot Assignment for Point-to-Multipoint Transmissions --- p.132Chapter 5.4 --- Network Design Example --- p.136Chapter 5.5 --- Chapter Summary --- p.143Appendix --- p.144Chapter Chapter 6 --- Conclusions --- p.147References --- p.15

    Telephone primer

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    The telephone is the most common and widely used electronic communication device in use today. Because of this, the military is heavily reliant on the telephone system and considers it the primary voice communications medium. Furthermore, recent technological advances will dramatically change the telephone as well as we know it today. This thesis will take a comprehensive look at the telephone in today's complex telecommunications environment. It will describe the technical aspects of individual components as well as how the system works as a whole. The divestiture of AT and T will be analyzed, especially the effects it has had on the military. After describing the historical and technical aspects of the telephone system, the thesis will focus its attention on military telephone programs and upgrades being planned to increase telephone capabilities and survivability.http://archive.org/details/telephoneprimer1094534900Commander, United States NavyApproved for public release; distribution is unlimited

    Optical fibre distributed access transmission systems (OFDATS)

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    Proceedings of the Mobile Satellite System Architectures and Multiple Access Techniques Workshop

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    The Mobile Satellite System Architectures and Multiple Access Techniques Workshop served as a forum for the debate of system and network architecture issues. Particular emphasis was on those issues relating to the choice of multiple access technique(s) for the Mobile Satellite Service (MSS). These proceedings contain articles that expand upon the 12 presentations given in the workshop. Contrasting views on Frequency Division Multiple Access (FDMA), Code Division Multiple Access (CDMA), and Time Division Multiple Access (TDMA)-based architectures are presented, and system issues relating to signaling, spacecraft design, and network management constraints are addressed. An overview article that summarizes the issues raised in the numerous discussion periods of the workshop is also included

    Satellite fixed communications service: A forecast of potential domestic demand through the year 2000. Volume 3: Appendices

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    Voice applications, data applications, video applications, impacted baseline forecasts, market distribution model, net long haul forecasts, trunking earth station definition and costs, trunking space segment cost, trunking entrance/exit links, trunking network costs and crossover distances with terrestrial tariffs, net addressable forecasts, capacity requirements, improving spectrum utilization, satellite system market development, and the 30/20 net accessible market are considered

    Statistical multiplexing and connection admission control in ATM networks

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    Asynchronous Transfer Mode (ATM) technology is widely employed for the transport of network traffic, and has the potential to be the base technology for the next generation of global communications. Connection Admission Control (CAC) is the effective traffic control mechanism which is necessary in ATM networks in order to avoid possible congestion at each network node and to achieve the Quality-of-Service (QoS) requested by each connection. CAC determines whether or not the network should accept a new connection. A new connection will only be accepted if the network has sufficient resources to meet its QoS requirements without affecting the QoS commitments already made by the network for existing connections. The design of a high-performance CAC is based on an in-depth understanding of the statistical characteristics of the traffic sources
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