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Community Networking Proceedings, 1997 Fourth International Workshop on

Date 11-12 Sept. 1997

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Displaying Results 1 - 22 of 22
  • 1997 Fourth International Workshop on Community Networking Processing

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  • Adapting technology to support multi-media composition

    Page(s): 143 - 147
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    To meet the challenge of content production for fully digital distribution, the industry must develop advanced system architectures and methods to compose, manage, and distribute content. Technical models from software development methods and metacomputer architectures can be adapted to meet many anticipated requirements View full abstract»

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  • Internet pricing and prioritization

    Page(s): 93 - 101
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    Considers the problems of Internet congestion and delays from an economic viewpoint and proposes a solution that properly aligns the economic incentives for both users and providers. As currently structured, economic incentives do not promote efficient usage. Furthermore, the current structure does not provide any incentive for service providers to increase capacity, and it does not allow them to provide the better-quality service that many users would be willing to pay for. We develop a properly incentivized economic scheme and an implementation strategy, taking into account the operational details of the medium and the realities of the market. The performance of the proposed plan is analyzed according to queuing theory, producing promising results View full abstract»

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  • The mirror-reflections on inhabited TV

    Page(s): 149 - 156
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    Inhabited TV is a vision of future television services in which multi-user virtual environments deliver unprecedented levels of audience participation. Social chat and interaction are mixed with professional content and programming to create on-line communities. The Mirror was a ground-breaking collaborative experiment in Inhabited TV created by BT, Sony Illuminations and the BBC. Six on-line worlds were available to over 2000 viewers of the BBC2 series “The Net” in January and February 1997, and this paper provides an overview of the project View full abstract»

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  • Cable systems and test trials with cable modems in Slovenia

    Page(s): 125 - 132
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    In Slovenia we have over 100 cable networks with approximately 220,000 cable connections. Some networks are in the reconstruction phase-topology of the system is transformed, the frequency band of networks is being increased, while the networks are being enabled for two-way communication. Several pilot projects are being carried out in Slovenia. An innovative technical solution for the cable modems was found. For these modems amplitude shift keying modulation was used. The speed is 1.25 Mbps and the frequency band is 6 MHz in each direction. At the present network load, users can reach transfer rate up to 750 kbps. The second pilot project is underway in Maribor, second biggest city in Slovenia. It is a tree topology system and has over 10,000 connections. At the moment, individual branches for enabling two-way communication are being brought up to date, at the same time domestic equipment and the equipment of different manufacturers is being tested View full abstract»

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  • Screen phones for interactive services

    Page(s): 3 - 6
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    This paper elaborates on the role and evolution of screen phones for the deployment of interactive services on the Public Switched Telephone Network (PSTN). Today, and for the next few years, Advanced Screen Telephony remains a means to enable the Public Telephone Network Operators to implement new services and offer them directly to the customer. With a modest investment in new equipment, they can create a highly loyal user base through the deployment of a variety of new services tailored to the needs of large communities of individual users View full abstract»

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  • BellSouth interactive media services in Chamblee, GA

    Page(s): 121 - 124
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    During 1995, BellSouth constructed an advanced multimedia network in the suburbs of Atlanta, Georgia. This network has been operational for over a year. This paper describes the expectations and accomplishments of that effort and the knowledge gained that can be applied to future networks View full abstract»

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  • Information supply-chains and Webcasting: a design framework

    Page(s): 103 - 111
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    Introduces a design framework for analyzing different intermediation structures in dynamic content creation and information distribution supply chains. The framework is developed around the concepts of content modularization and postponement. In the framework, modularization is related to inbound content as a combination of the different information components used in the assembly of the digital product. Postponement corresponds to the point in the channel where the product gets customized based on preferences or local knowledge. The presented framework is characterized by four structures defined according to the combined level of modularization and postponement: rigid/sequential, customized, modularized and flexible. A key finding of the framework is that the choice of intermediation structure is a function of content and organizational structure/decision rights. Also, another finding is that rigid or sequential structures are desirable for real-time products under quality-of-service and service-time constraints, while flexible supply chains are more desirable under competitive differentiation and customization constraints View full abstract»

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  • The role of the PC in the connected home

    Page(s): 13 - 18
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    Over the next few years homes will become increasingly “connected”, both internally and to the outside world. We expect to see a variety of broadband access networks appear to deliver digital content to the home, both Internet based and broadcast. At the same time, an increasing number of homes have multiple PCs and are beginning to connect them. As other consumer devices also become digital, those will also become connected. Just as the role of the PC and its software changed significantly in business when PCs moved from stand-alone to connected, we expect new roles and capabilities to appear for the PC at home as it develops continuous connections to other devices. This paper discusses the technologies we see appearing and how they will impact the function and role of the PC View full abstract»

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  • Reliability and availability issues in distributed component object model (DCOM)

    Page(s): 59 - 63
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    Distributed Component Object Model (DCOM) is one of the emerging standards for distributed objects. Before DCOM can be used to build mission-critical applications, the reliability and availability issues must be addressed. In this position paper, we outline the current research directions of the InterCOM project, which exploits the dynamic behavior, the extensible architecture, and the component software model of DCOM to provide fault tolerance capabilities to distributed applications View full abstract»

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  • Prefetching protocols for VBR video on demand

    Page(s): 37 - 43
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    In this paper we outline several high-performance prefetching protocols for the transport of VBR-encoded video on demand. For the same image quality and cost, our protocols allow a VoD service provider to provide significantly more video connections than what is possible with CBR-encoded videos. The protocols therefore allow VoD service providers to earn significantly more revenue without increasing cost. The protocols require each client to have about 10 Mbytes of memory dedicated to the VoD application. Our protocols are particularly well-suited for the provision of VoD from a cable headend or from an ADSL switch over a community network to household PCs or to Web-TVs. The protocols are designed for high-performance video-on-demand: They give immediate commencement of playback upon user request, they allow for instantaneous user interactivity, and they promise consistently high image quality. We present two protocols. The first protocol is appropriate for when all of the videos emanate from a single server. The second is appropriate for when the videos emanate from multiple servers View full abstract»

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  • Delivering interactive services to home using digital video broadcast infrastructure

    Page(s): 133 - 142
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    Commercial deployments of digital TV provide a digital video broadcast (DVB) infrastructure. DVB is a large digital broadband network with data delivery capability and with digital terminals (set-top boxes) at the user premises. As such, it provides a powerful platform for delivery of additional information and data services that can not only enrich but fundamentally transform the television viewing experience. This paper provides an overview of an architecture for interactive service delivery to home via the DVB infrastructure in systems with and without the return channel. The presented approach relies on a novel broadcast model of computing which is ideally suited to the DVB infrastructure. This model works even with low-cost user terminals, such as the basic digital TV set-top boxes with limited computational and graphics capability and no local disk storage View full abstract»

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  • Network design of cable modem systems for WWW applications

    Page(s): 45 - 51
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    The cable industry has begun testing and deploying high speed cable modems for data delivery. However, practical network designs require the estimation and prediction of performance under realistic traffic models and must consider the dominant factors that affect packet loss probabilities and offered load. In this paper we evaluate the use of a stochastic model of WWW client-server transactions as a tool for network design and analysis. Specifically, a sensitivity analysis of the model is performed to identify the impact various model parameters have on predicted packet loss probabilities in an Internet access network utilizing CATV transport. The traffic model used is a self-similar traffic model in which the inter-arrival times of document requests generated by each source is based on a two-state ON-OFF source model described and the length of each document is given by a Pareto distribution. We investigate the results of using such a model in predicting a number of network performance parameters including buffer requirements and achieved channel utilization. We also evaluate the number of WWW users that a head-end can support for a specific bandwidth. The effects of multiplexing, decreasing the inter-arrival times, increasing the length of the ON period, changing the tail of the document size distribution, and increasing the buffer size are all considered. We also identify which parameters most affect the packet loss probability and the offered load on the system. Such parameters will be the dominant factors that need to be used in network and capacity planning for CATV data delivery systems View full abstract»

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  • Emerging home digital networking needs

    Page(s): 7 - 12
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    In this paper, the situation of an emerging home network environment is examined. There are four driving needs for a home network. They are home automation, home computer, digital audio and video distribution, and digital access network. In the past, the home network is driven by home automation and analog audio and video distribution systems. Most recently, the effort on the development of a digital home network has been driven by emerging digital access and digital consumer electronics technologies. The system requirements are analyzed for different home network applications. The possibility of using IEEE 1394 protocol for a digital home network is explored View full abstract»

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  • Middleware support for scalable services

    Page(s): 53 - 58
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    Services targeted to the home environment must deal with software and hardware heterogeneity of client and server machines. Distributed object based middleware is attractive for building distributed services in such heterogeneous environments for a number of reasons. In particular, distributed objects can hide the complexities that arise from distribution and heterogeneity in the underlying system. To deal with the scale of home based applications and to reduce the effects of high latencies in such environments, we have been exploring efficient implementations of distributed object systems that exploit caching and replication of service state. In this paper, we explore issues related to object state caching and communication for distributed object systems View full abstract»

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  • An advanced video platform for the cable industry

    Page(s): 31 - 33
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    Two way Hybrid Fiber/Coax (HFC) networks are being rapidly deployed by major cable TV companies. This paper proposes an open platform consisting of a home set top box plus supporting network elements that would allow cable operators to offer advanced services that other delivery media would have difficulty in matching. The platform would support both analog and digital video broadcast delivery as well as provide two way Internet Protocol (IP) connectivity to the set top box. The set top box would combine the capabilities of a digital broadcast set top box and a network computer-like platform. It is recommended that such a platform supports open API's such as HTML and Java. With such tools, integrated video and data applications can be developed. The platform would be based on open standards such as the Society of Cable Telecommunications Engineers (SCTE) Digital Video Subcommittee standards for digital broadcast and interactive standards such as MPEG Part 6 (DSM-CC) and DAVIC View full abstract»

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  • Broadband to the home: a Bell Atlantic perspective

    Page(s): 25 - 30
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    The residential gateway (RG) is a critical element in offering residential broadband services. An RG provides the interface between customer premise equipment (CPE) and the network provider's residential access network. This paper examines the impact of two broadband services on RG functionality: high speed data service and video service. Sample protocol architectures capable of supporting these services are analyzed to assess the types of RG functionality required. Based on this work, it is concluded that RG functionality should be viewed as a strategic issue for companies offering broadband services View full abstract»

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  • Anywhere in the home

    Page(s): 19 - 24
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    The home PC, and the home computing environment in general, has undergone a significant evolution. We trace this evolution, and argue that the time is ripe for the development of an integrated networking infrastructure within the home, with the home PC as the focal point. Consumers to whom we have talked have definite ideas on what they would like to do with this infrastructure, and we discuss both their desires and their concerns. We present a high-level architecture for home networking, and describe IBM products and prototypes that represent the early stages of implementing this architecture View full abstract»

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  • The field trial of regional community network in Hayashi company houses

    Page(s): 115 - 120
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    Residential use of computer communication is a major topic in current computer and telecommunication research, and it is important to design a network platform which is capable of supporting residential users. As one such platform, we discuss the regional community network system. Employing fiber-optic subscriber lines, it provides a cost-effective LAN-like environment to regional community members. We assume that this system will become the basic access platform for residential users' computer communications in the near future. After completing our basic study and design, we started field testing this network system using about 180 families at NTT company houses located in Hayashi, Yokosuka, Japan, in October 1995. We installed optical subscriber lines to each family's home to provide a computer communication environment. The trial has two goals: to prove the feasibility of the system and to determine how residential users apply the network. Though we provided only the basic network infrastructure with virtually no information content, trial participants quickly learnt to post messages and to make their own contents on the network. This trial is scheduled to continue until 1998. This paper is an interim report and shows how the participants used the regional community network in the first year of the trial View full abstract»

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  • Intelligent agents for on-line commerce: a crying need for service standardization

    Page(s): 87 - 92
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    The number of multimedia applications on the Internet is growing each day. Also, a wide variety of online services have been offered to telecom network users. However, the introduction of new services remains lengthy, and access to new services is often a painstaking task. One of the main reasons behind this problem is the lack of standards for describing information and services. Therefore, a standard for classifying services by fields and features is needed. This becomes a real prerequisite for success in a telecom market that is open for competition. After giving a survey of some previous initiatives in this field, we present a generic service model and propose a set of solutions using standard languages, such as KQML and SGML, within a distributed architecture hosting intelligent agents. This approach also allows service providers to build on the existing infrastructure and to evolve it into an open, knowledge-aware, integrated business platform View full abstract»

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  • Successful product characteristics for electronic commerce: a taxonomy of transaction types

    Page(s): 77 - 85
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    There is no generally accepted definition of what electronic commerce is, nor how to classify different types of electronic transactions. Without a clear definition or taxonomy, it is bound to be difficult to organize electronic commerce-related research activities. Neither is it possible for organizations to frame their electronic commerce strategies to address such issues as product promotion, payment arrangements, customer support and product delivery/distribution. In this article, we develop such a taxonomy and to offer a definition of electronic commerce. First we review certain demographic profiles of Internet/Web users. We then assess a selected group of Web domains/sites that have attracted the most attention in the media, characteristics of the products and services the sites deliver. A few lessons in consumer behavior are drawn from the experiences in alternate media such as home-shopping TV and catalog shopping. Based on these, we define electronic commerce as consisting of transactions conducted on the Internet between buyers and sellers, with or without the aid of an intermediary, in which invoicing is completed electronically and payment with a credit card is authorized using a secure server (Level I.1) or by e-mail (Level I.2). We conclude by discussing the management implications of our taxonomy, including the potential value of Internet telephony View full abstract»

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  • Villa: an event based middleware for real-time collaboration on the Internet

    Page(s): 65 - 74
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    It is becoming increasingly clear that the next generation of Internet applications will involve the efficient exchange of real-time information. The current Internet technology does not provide sufficient support for such applications. Instead, the current protocols and engines on the Internet are designed for static information browsing. A primary goal of this research project is to study the requirements of Internet applications requiring extensive real-time information exchange and to develop a framework and the required middleware which can be used to write such scalable collaborative applications over the Internet. This paper describes the architecture and the implementation of such a system called Villa. Villa is based on an asynchronous event-based toolkit and is designed to build scalable collaborative applications over the Internet View full abstract»

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