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Communications Magazine, IEEE

Issue 6 • Date June 1997

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Displaying Results 1 - 19 of 19
  • Residential Broadband Services And Networks [Guest Editorial]

    Publication Year: 1997 , Page(s): 56 - 58
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    Freely Available from IEEE
  • The Global Internet [Guest Editorial]

    Publication Year: 1997 , Page(s): 122
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    Freely Available from IEEE
  • Internet Technology Series [Guest Editorial]

    Publication Year: 1997 , Page(s): 158
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    Freely Available from IEEE
  • Modeling Internet topology

    Publication Year: 1997 , Page(s): 160 - 163
    Cited by:  Papers (223)  |  Patents (10)
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    The topology of a network, or a group of networks such as the Internet, has a strong bearing on many management and performance issues. Good models of the topological structure of a network are essential for developing and analyzing internetworking technology. This article discusses how graph-based models can be used to represent the topology of large networks, particularly aspects of locality and hierarchy present in the Internet. Two implementations that generate networks whose topology resembles that of typical internetworks are described, together with publicly available source code. View full abstract»

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  • Elements of the emerging broadband information highway

    Publication Year: 1997 , Page(s): 84 - 91, 94
    Cited by:  Papers (4)
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    General design considerations for the broadband information highway of the future are given in the context of interactive broadband services to the home. As potential precursors to this highway, the telephone, the Internet, and cable television networks are examined. Several emerging technologies are also examined as candidates for the future local subscriber loop. For the information highway, classes of network services are proposed that are independent of the specific network technologies used. It is suggested that the information highway be partitioned logically or physically so as to provide a variety of service levels according to the subscriber's cost and quality of service requirements. This should yield better network economies and provide the end user with a viable range of connectivity options View full abstract»

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  • Using agents for secure access to data in the Internet

    Publication Year: 1997 , Page(s): 136 - 140
    Cited by:  Papers (3)  |  Patents (5)
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    Relatively few databases are accessible over the Internet. With today's technology one would like to encapsulate a database and make it available over the Internet. A client using such databases would browse an old census database, look up references in an object-oriented database system, access descriptions and pictures over the Internet, or combine different information using NCSA Mosaic, Web, or backend databases. This article describes our experiences within the context of the DOK (distributed object kernel). This project aims to design a secure database middleware that enables users to effectively search, update, and combine information in distributed, heterogeneous environments. The DOK system uses security agents to maintain a DOK federation in a secure state. Different types of security agents are involved in the enforcement of security policies. Coordination agents are responsible for managing the whole federation, and delegate functions to more specific agents, called task agents. By delegating the access to information of local databases to database agents, task agents are able to control any access to a federation by using specifically designed security procedures View full abstract»

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  • Customer premises equipment for residential broadband networks

    Publication Year: 1997 , Page(s): 114 - 121
    Cited by:  Papers (4)  |  Patents (5)
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    The evolution of telephone networks from narrowband to broadband will require a rethinking of the rules for customer premises equipment. The introduction of a variety of transmission technologies and network interfaces will require that incumbent local exchange carriers and entrants have the ability to deploy and manage equipment to terminate high-speed digital signals. This article presents a perspective on the types of terminal equipment which are likely to be utilized in the residence in the future, the types of access network connections this equipment will have, and the regulatory situation with respect to broadband CPE, in light of the history of CPE and the Telecommunications Act of 1996 View full abstract»

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  • Integrating communication services

    Publication Year: 1997 , Page(s): 164 - 169
    Cited by:  Papers (9)  |  Patents (33)
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    The need for communication services which span multiple communication technologies is growing. Communication services are being developed in three areas: in the public switched telephony networks, on the Internet in the form of integrated multimedia including voice-over-Internet, and in private switched telephony networks in the form of enterprise computer-telephony integration applications. This article shows it is plausible to create unified services which span the Internet and public switched telephony networks, and goes on to describe Nexus, an architecture and prototype for integrated communication services View full abstract»

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  • The (R)evolution of access networks for the information superhighway

    Publication Year: 1997 , Page(s): 104 - 112
    Cited by:  Papers (10)
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    Competition in deregulated telecommunication markets forces network operators to modernize their access networks-often called the “last mile” to the customer-to provide a mix of multimedia and traditional telecommunication services. Economics necessitate an evolutionary, step-by-step approach to migrate from the present access infrastructure-composed mainly of existing telephone networks and cable TV networks-to the ultimate information superhighway. At the end of the day, however, networks of different operators should provide interconnectivity for the same set of services. A system concept is described that drives access network technology toward a “common platform” with generic access methods, cognate routing and switching, and common, standardized communication protocols. Simulation results show some performance figures of the common platform concept. An implementation on a CATV network is presented as well View full abstract»

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  • Participant registration, validation, and key distribution for large-scale conferencing systems

    Publication Year: 1997 , Page(s): 130 - 134
    Cited by:  Papers (4)  |  Patents (1)
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    DiRK (Distributed Registration and Key distribution) is a technique that can be used in large-scale conferencing systems to handle participant registration, validation, and key distribution in a decentralized and distributed way. The basic idea is to distinguish active and passive participants in a conference session, and to have the active participants assist the session holder to register participants and distribute session keys accordingly. This article introduces the basic principles of DiRK and overviews a prototype implementation for the Internet Multicast Backbone (MBone). As an exemplary application, the article also addresses the use of DiRK in distance education and teleteaching View full abstract»

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  • Multicast group behavior in the Internet's multicast backbone (MBone)

    Publication Year: 1997 , Page(s): 124 - 129
    Cited by:  Papers (54)  |  Patents (4)
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    The multicast backbone (MBone) is a network overlaying the global Internet and designed to support multipoint applications. The authors first give an overview of the development and architecture of the current MBone. One important characteristic of the MBone is its reliance on IP multicast which allows receivers to join and leave groups asynchronously. The authors describe the Mlisten data collection tool that was created to provide a mechanism for capturing information about when members join and leave a multicast group. Using data collected with Mlisten, the authors present statistics about some of the MBone sessions they monitored. Results are provided for key parameters including multicast participant interarrival times and participant durations, multicast tree size and characteristics, and intersession relationships. Collecting data about MBone usage can improve our understanding of how multicast communication and real-time protocols are being used today View full abstract»

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  • Interactive digital video networks: lessons from a commercial deployment

    Publication Year: 1997 , Page(s): 70 - 74
    Cited by:  Papers (1)  |  Patents (8)
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    Broadband networks are now being used in numerous trials throughout the world to provide interactive video services for residential customers. These trials and small-scale commercial deployments lack novel applications and services that make effective use of network capabilities and attract users to experiment with them. The rapid explosion of the Internet has also played a role in the current lack of interest and investment in broadband video networks. This article examines the lessons learned from the commercial deployment of a switched fiber-coax video dial tone network in Dover Township, New Jersey, USA. Future broadband networks will have to combine the capabilities of video dial tone networks and the Internet at an attractive price. Innovative end-to-end applications that go beyond cable TV and movies on demand are needed to renew commercial interest in residential broadband networks View full abstract»

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  • Relational databases create online publications

    Publication Year: 1997 , Page(s): 152 - 155
    Cited by:  Patents (1)
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    Relational databases that are accessible and updatable via the Internet afford Web designers many advantages over traditional HTML documents. The automatic interactive database approach (AIDA) to Web publishing eliminates old information, creates automatic links, and reduces memory requirements by using virtual HTML pages. The pages are consistent, reliable, and up to date View full abstract»

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  • From bookmark managers to distributed indexing: an evolutionary way to the next generation of search engines

    Publication Year: 1997 , Page(s): 146 - 151
    Cited by:  Papers (1)  |  Patents (7)
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    This article presents a system designed to substitute current centralized Internet search engines with a distributed indexing scheme in a gradual sequence of steps. The advantage of this transition process is that each of the steps is relatively simple and at the same time makes a significant contribution to the quality of the whole system, resulting in a system with remarkable properties. It is scalable and automatically adaptive, and it facilitates not only the search for information, but also cooperative information filtering and decentralized publishing. Current technology is based on the use of large centralized databases and has potential scalability problems which will become apparent with the further growth of the Internet. This is why the authors believe that sooner or later the transition process presented in this article will take place. The main principles of the new distributed system are presented and discussed. The authors also identify the problems environments such as the Internet present for resource discovery systems. A number of resource discovery projects targeting these problems are analyzed in the second part of the article, and their strengths and disadvantages are identified View full abstract»

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  • Risk analysis of residential broadband upgrade in a competitive and changing market

    Publication Year: 1997 , Page(s): 96 - 103
    Cited by:  Papers (2)
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    The article presents risk and techno-economic analyses of broadband access network upgrade strategies for public network operators and cable operators in a competitive environment in the residential and small business market. The effect of uncertainties in predictions of critical parameters such as demand forecasts and market shares are analyzed. The assessed technology options include broadband twisted pair modem, hybrid fiber coax networks, and ATM-based passive optical networks View full abstract»

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  • World Wide Web caching: the application-level view of the Internet

    Publication Year: 1997 , Page(s): 170 - 178
    Cited by:  Papers (20)  |  Patents (11)
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    The Internet has fallen prey to its most successful service, the World Wide Web. The networks do not keep up with the demands incurred by the huge amount of Web surfers. Thus, it takes longer and longer to obtain the information one wants to access via the World Wide Web. Many solutions to the problem of network congestion have been developed in distributed systems research in general and distributed file and database systems in particular. The introduction of caching and replication strategies has proven to help in many situations; therefore, these techniques are also applied to the Web. Although most problems and associated solutions are known, some circumstances are different with the Web, forcing the adaptation of known strategies. This article gives an overview of these differences and currently deployed, developed, and evaluated solutions View full abstract»

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  • Interactive multimedia services to residential users

    Publication Year: 1997 , Page(s): 61 - 68
    Cited by:  Papers (1)
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    Despite the business risks involved in the introduction of digital video and interactive television, vigorous investments made by the telecommunication industries and content owners clearly demonstrate the belief that such services are going to happen. In this paper, a complete scenario for the provision of interactive multimedia services from the residential user's point of view is considered, focusing on software components. Initially, a reference architecture configuration, based on the DAVIC paradigm, suitable for the provision of residential interactive broadband services is presented. In addition to hardware capabilities, the system will be considered successful only if it is easy to learn, worth the time and cost-effective. Consequently, a set of possible service requirements is introduced and a development process for distributed interactive multimedia applications is proposed. Finally, based on experience gained from the implementation of applications in different residential trials throughout Europe, guidelines and methodologies for user interface design are illustrated View full abstract»

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  • Residential broadband Internet services and applications requirements

    Publication Year: 1997 , Page(s): 76 - 83
    Cited by:  Papers (19)
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    Consumer interest in accessing the Internet for browsing the World Wide Web has exploded in the past two years. The current narrowband residential Internet access infrastructure using dial-up through the PSTN not only is too slow, but also leads to high service blocking probability. Hence, providing an “always-on” high-speed Internet access service has been viewed as the new killer application for residential broadband networks. Residential broadband Internet service design requires understanding of the networking requirements of broadband Internet applications. This article provides a framework for characterizing applications requirements in general, with special emphasis on Internet applications such as Web browsing. The author presents a classification of applications based on their networking requirements, and discusses the traffic and quality of service requirements for each application class View full abstract»

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  • A quick tutorial on searching and evaluating Internet resources

    Publication Year: 1997 , Page(s): 142 - 145
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    Do you know the difference between Yahoo and AltaVista? Do all your friends and students know? If no, this tutorial is for you. It explains some basic concepts, understanding which makes life on the Internet much easier. Now that the Internet is moving into the general knowledge of everybody and is taught in schools, we need to find some general, underlying ideas of how to deal with it. Wiring schools, as is happening now throughout the United States and other countries, is not enough. Teachers and students must be trained. This tutorial covers two small but important aspects of that training. The first part considers searching on the Internet; the second deals with quality and authority of information found on the Internet. It is a common mistake to assume that high technology guarantees high quality. Just because something is on the Web does not necessarily mean it is true 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