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Communications Magazine, IEEE

Issue 1 • Date Jan. 1999

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Displaying Results 1 - 17 of 17
  • Traffic Management and Switching for Multimedia

    Publication Year: 1999 , Page(s): 30
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  • Digital Library Using Next Generation Internet

    Publication Year: 1999 , Page(s): 70 - 71
    Cited by:  Papers (1)
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  • A digital library for biomedical imaging on the Internet

    Publication Year: 1999 , Page(s): 84 - 91
    Cited by:  Papers (5)  |  Patents (7)
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    Traditional medical image management systems, such as picture and archiving communication systems, are based on specialized workstations and closed systems architecture. Internet technology is being explored for the efficient and cost-effective distribution of biomedical images. This article discusses new issues of a digital library for medical imaging, presents two different architectures for a Web-based medical imaging library, and illustrates their utilization with implemented examples. View full abstract»

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  • Electronic Commerce And Standardization

    Publication Year: 1999 , Page(s): 142 - 143
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  • QoS support for integrated services over CATV

    Publication Year: 1999 , Page(s): 64 - 68
    Cited by:  Papers (9)  |  Patents (3)
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    Cable TV has emerged as a promising access network infrastructure for the delivery of voice, video, and high-speed data traffic. A central issue in the design of protocols for CATV networks is to support different levels of QoS for diverse user applications. While CATV service providers and equipment have standardized, in the so-called MCNS protocol, the basic network architecture and interfaces, issues in the MAC layer for QoS support are likely to be left for differentiation in vendor products. This article first presents an overview of the basic CATV network architectural assumptions and the set of QoS requirements for supporting integrated services over CATV. It then discusses a MAC layer scheduling protocol that can efficiently multiplex constant bit rate traffic, such as voice over IP with guaranteed delay bound, and best-effort traffic, such as data services with minimum bit rate guarantee, while achieving fairness on any excess available bandwidth. The performance of this algorithm is illustrated by simulation results using Opnet. We also discuss a dynamic polling mechanism that enhances the link utilization while preserving delay bounds for latency-critical traffic View full abstract»

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  • Achieving minimum slice loss for real time MPEG 2 based video networking in a flow-oriented input-queued ATM switching router system

    Publication Year: 1999 , Page(s): 58 - 62
    Cited by:  Papers (5)
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    Since the slice is the basic reconstruction unit at the display device, the MPEG-2-based video traffic in an ATM network is treated as many slice flows. For a real-time MPEG-2-based video service, the most important restriction is that all cells in a slice flow must be transmitted to their destination node completely before the deadline; otherwise, they should be dropped totally. The main purpose of this article is to propose a flow-oriented input-queued ATM switching router architecture with a scheduling strategy, MCL-MSL, taking advantage of the above characteristics to achieve higher-quality video services and more efficient utilization of network bandwidth. If the needed bandwidth for transmitting slice flows exceeds the available network bandwidth, MCL-MSL selects the slice flow with minimum slice loss for transmission. Furthermore, if multiple choices exist, it selects the one with maximum cell loss among them to achieve the most efficient bandwidth utilization View full abstract»

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  • Digital video libraries and the Internet

    Publication Year: 1999 , Page(s): 92 - 97
    Cited by:  Papers (4)  |  Patents (9)
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    Digital video libraries are positioned to be a major driving application for the Next Generation Internet Initiative. Likewise, the advancements in the communications infrastructure will be of great benefit to digital video libraries. This report investigates some of the recent technologies for handling video in digital video libraries and reviews the NGII's planned advancements in network communications technologies in order to examine their impact on deploying digital video libraries on the Internet View full abstract»

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  • Agent based digital libraries: decentralization and coordination

    Publication Year: 1999 , Page(s): 110 - 115
    Cited by:  Papers (6)
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    This article describes agent-based systems and explains why digital libraries should be built with this type of architecture. The primary advantage of agent-based architecture is decentralization, which enables scaling, flexibility, and extensibility. The corresponding requirement is the need to coordinate agent activity. We describe the approach taken by the University of Michigan Digital Library project View full abstract»

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  • Bandwidth allocation strategies for transporting variable bit rate video traffic

    Publication Year: 1999 , Page(s): 40 - 46
    Cited by:  Papers (27)  |  Patents (2)
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    Large-scale deployment and successful commercialization of digital video services over computer networks strongly depend on the cost effectiveness of these services. Network bandwidth is one of the major factors that impact the cost of a video service. We survey various approaches to reducing the bandwidth requirement for transporting compressed video traffic over high-speed networks View full abstract»

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  • Developing digital libraries of cultural content for Internet access

    Publication Year: 1999 , Page(s): 72 - 78
    Cited by:  Papers (3)
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    Over the past five years, interest in digital libraries and in the World Wide Web have both greatly increased as the result of a symbiotic relationship. For an even longer period, my IBM colleagues and I have been developing online digital libraries for cultural institutions. In this article, selected aspects of projects with the Vatican Library, the National Gallery of Art (United States), the Klau Library of Hebrew Union College, and Russia's State Hermitage Museum are reported. In these projects, both technical and institutional challenges were met. Three technical challenges are discussed: protecting the intellectual property rights of institutions to their online materials; producing high-quality images with data sizes that are suitable for Internet delivery; and achieving significant capture throughput. Finally, some opinions are offered on the outlook for digital libraries of cultural content View full abstract»

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  • QoS and multipoint support for multimedia applications over the ATM ABR service

    Publication Year: 1999 , Page(s): 53 - 57
    Cited by:  Papers (5)
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    Multimedia applications with stringent delay requirements are usually supported by the constant bit rate (CBR) or real-time variable bit rate (rt-VBR) service categories of ATM. This article shows that the available bit rate (ABR) service, which was originally designed for data, can also support multimedia applications under certain circumstances. Issues related to the design of proper ABR traffic management algorithms for such support are presented View full abstract»

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  • Traffic management of multimedia over ATM networks

    Publication Year: 1999 , Page(s): 33 - 38
    Cited by:  Papers (9)  |  Patents (2)
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    Multimedia is characterized by bursty traffic and often stringent real-time constraints. Multimedia traffic requires quality of service guarantees. This gives rise to traffic management issues in order to obtain high network utilization and quality of service guarantee to the multimedia stream. The aim of this article is to present an overview of the traffic management issues and their possible solutions for transmission of multimedia over asynchronous transfer mode networks View full abstract»

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  • Packet optical networks for high-speed TCP-IP backbones

    Publication Year: 1999 , Page(s): 124 - 129
    Cited by:  Papers (17)  |  Patents (1)
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    This article presents a new proposal for TCP-IP backbone implementation based on optical packet switching technology. The proposed network architecture merges the flexibility in resource management of packet switching with the high capacity offered by full optical technology View full abstract»

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  • Data rides high on high-speed remote access

    Publication Year: 1999 , Page(s): 130 - 141
    Cited by:  Papers (5)  |  Patents (3)
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    Internet and remote access services are growing by leaps and bounds, and major efforts are currently underway to provide greater bandwidth to the user by a multitude of access technologies, both wired and wireless. This article discusses the key access technologies currently being developed by vendors and deployed by service providers. It is expected that xDSL, cable data networks, and fixed and mobile wireless networks will be the hotbeds of tough competition, while direct satellite networks will hover over them with the potential to completely change the way the access networks are built. Irrespective of the ongoing debate on which technology would win or loose, in the world of real networks different access solutions will coexist, finding their own niches to meet the varying demands of performance and cost objectives for the end user View full abstract»

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  • Searching the Web: general and scientific information access

    Publication Year: 1999 , Page(s): 116 - 122
    Cited by:  Papers (6)  |  Patents (2)
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    The World Wide Web has revolutionized the way people access information, and has opened up new possibilities in areas such as digital libraries, general and scientific information dissemination and retrieval, education, commerce, entertainment, government and health care. There are many avenues for improvement of the Web; for example, in the areas of locating and organizing information. Current techniques for access to both general and scientific information on the Web provide much room for improvement; search engines do not provide comprehensive indices of the Web and have difficulty in accurately ranking the relevance of results. Scientific information on the Web is very disorganized. We discuss the effectiveness of Web search engines, including results showing that the major Web search engines cover only a fraction of the “publicly indexable Web”. Current research into improved searching of the Web is discussed, including new techniques for ranking the relevance of results, and new techniques in metasearch that can improve the efficiency and effectiveness of Web search. The creation of digital libraries incorporating autonomous citation indexing is discussed for improved access to scientific information on the Web View full abstract»

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  • Image libraries and the Internet

    Publication Year: 1999 , Page(s): 99 - 106
    Cited by:  Patents (2)
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    Digital imaging is becoming a major information resource within the Internet. Although image access tools are primitive today, they are evolving rapidly. We look at content descriptor-based and pixel-based image queries for accessing large image libraries. The access methods will be combined and enhanced in future retrieval systems View full abstract»

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  • On multimedia networks: self-similar traffic and network performance

    Publication Year: 1999 , Page(s): 48 - 52
    Cited by:  Papers (36)  |  Patents (9)
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    The main objective in telecommunications network engineering is to have as many happy users as possible. In other words, the network engineer has to resolve the trade-off between capacity and QoS requirements. Accurate modeling of the offered traffic load is the first step in optimizing resource allocation algorithms such that provision of services complies with the QoS constraints while maintaining maximum capacity. As broadband multimedia services became popular, they necessitated new traffic models with self-similar characteristics. We present a survey of the self-similarity phenomenon observed in multimedia traffic and its implications on network performance. Our current research aims to fill the gap between this new traffic model and network engineering. An immediate consequence of this study is the demonstration of the limitations or validity of conventional resource allocation methods in the presence of self-similar traffic View full abstract»

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Aims & Scope

IEEE Communications Magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications systems (PCS), ISDN, and more.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Osman Gebizlioglu
Huawei Technologies