1988 International Zurich Seminar on Digital Communications - Mapping New Applications onto New Technologies. Proceedings

8-10 March 1988

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  • 1988 International Zurich Seminar on Digital Communications: Mapping New Applications onto New Technologies (Cat. No.88TH0202-2)

    Publication Year: 1988
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    Freely Available from IEEE
  • An improved CSMA/CD protocol for the packet-switched channel of the integrated services terminal bus

    Publication Year: 1988, Page(s):179 - 184
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The Integrated Services Terminal (IST) bus is a low-cost, ISDN (integrated-services-digital-network)-compatible LAN that carries eight 64 kb/s circuit-switched channels and one 64 kb/s packet-switched channel. An improved CSMA-CD (carrier-sense multiaccess with collision detection) protocol on the latter channel guarantees access even with 100% load. The results of a computer-based investigation i... View full abstract»

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  • Performance comparison of multistage cube-type interconnection networks

    Publication Year: 1988, Page(s):213 - 219
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    The novel approach to the performance analysis of interconnection networks is developed to better understand their various properties and to form a basis for a more accurate evaluation of the real costs of a network implementation. The performance of the interconnection network is analyzed using a simplified model in a packet-switched environment in which queueing effects are neglected. The class ... View full abstract»

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  • An investigation of packetised voice on the FDDI token ring

    Publication Year: 1988, Page(s):171 - 178
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The aim of the study is to verify that the fiber distributed data interface (FDDI), a proposed American National Standard for a 100 Mb/s token ring network using a fiber-optic medium that can support packetized voice while providing a reasonable service for asynchronous traffic. The authors begin by analyzing the maximum number of voice conversations the can be supported by a 100 Mbs/s FDDI token-... View full abstract»

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  • Multi-path routing techniques for a class of multistage fast packet switches

    Publication Year: 1988, Page(s):207 - 212
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    The Banyan interconnection, while well suited to multiprocessor and fast packet communication systems, is prone to link congestion resulting in a blocking switch architecture. Solutions have been proposed to reduce the severity of link congestion. In general, these solutions tend to increase packet delay variability and allow delivery of out-of-sequence packets. This may lead to an increase in end... View full abstract»

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  • Performance modelling of the Cambridge Fast Ring protocol

    Publication Year: 1988, Page(s):163 - 170
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    The Cambridge Fast Ring is high-speed slotted ring. The features that make it suitable for use at very large transmission rates are the synchronous transmission, the simplicity of the medium-access-control protocol, and the possibility of immediate retransmission of erroneous packets. A novel analytical model of the Cambridge Fast Ring with normal slots is presented. The model is shown to be accur... View full abstract»

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  • Design options for ATM networks

    Publication Year: 1988, Page(s):199 - 205
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    In response to the unpredictability of the future telecommunications environment, a common, simplified and possibly versatile transmission principle, ATM (asynchronous transfer mode) has been suggested. The principle has the potential of becoming a unified way to transmit various types of data in a common network. The authors consider the pros and cons of several options regarding the specific des... View full abstract»

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  • Eradicating the central office with coherent optical technology

    Publication Year: 1988, Page(s):59 - 62
    Cited by:  Papers (3)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The replacement of the central office by a passive fiber network, the wide spectrum of which is used as an optical ether, is considered. Applications in the local loop and, with the addition of optical amplifiers, in long-haul networks, are discussed. The technology needed for such systems is considered View full abstract»

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  • Videomatic switching: systems and services

    Publication Year: 1988, Page(s):37 - 43
    Cited by:  Patents (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    An overview is provided of the trends in videomatic services and systems now coming into being with the advent of ISDN (integrated-services digital networks) and the prospect of broadband ISDN. Service aspects are discussed, including videoconferencing, videocoding, and videotelephony, and the LVX (local video exchange) system, an integrated video-voice-data local area network, is described from i... View full abstract»

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  • Modelling and analysis of a high speed token ring backbone network for a realistic scenario

    Publication Year: 1988, Page(s):155 - 161
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    A multiple-token-ring-backbone is modeled and evaluated for mixed traffic imposed by different applications. The suitability of this medium-access protocol is studied on the basis of both queue length and packet delay. The token access method is analyzed with respect to buffer dimensioning and packet delay. A realistic scenario with file transfer and interactive traffic reaching a high-speed backb... View full abstract»

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  • A packet network for BISDN applications

    Publication Year: 1988, Page(s):191 - 197
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    A description is given of a broadband packet network architecture suitable for evolving the existing public switching network into an all-fiber broadband network for integrated voice, data, and video applications. The architecture takes into account the needs for bit-rate flexibility, robustness to service evolution, and interoperability with the existing circuit-switched public network. Key featu... View full abstract»

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  • Control architecture for next generation communication network based on distributed databases

    Publication Year: 1988, Page(s):231 - 237
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    An intelligent routing control system that uses distributed databases is discussed. Each database manages a switching system, and the databases are connected through high-speed signalling networks that are separated from the transport network. If a requested physical address cannot be found in one database, search request messages are distributed, to all the other databases simultaneously. It is s... View full abstract»

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  • Coping with complexity: service specification for a network services testbed

    Publication Year: 1988, Page(s):13 - 20
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The authors discuss their efforts to control the complexity of service specification in the modular integrated communications environment (MICE), a rapid prototyping system for network services. In MICE, services are defined in interpretively-executed fine-state logic tables. They describe attempts to reduce the complexity of service logic specification in MICE by means of a graphical structure ed... View full abstract»

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  • A set of operating system mechanisms to support multi-media applications

    Publication Year: 1988, Page(s):71 - 76
    Cited by:  Papers (13)  |  Patents (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    The operating system of a terminal in a multimedia communication network needs mechanisms to manipulate the network interface and to direct the information flow. Some approaches and hardware support that can provide these capabilities are reported. These include a connector object to control the information exchange among the network interface and the voice, data, and image peripherals and the con... View full abstract»

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  • An ISDN basic access LSI

    Publication Year: 1988, Page(s):53 - 57
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A description is given of an ISDN (integrated-services digital network) basic-access LSI that can be used in various kinds of terminals. This LSI performs all layer-1 and layer-2 functions defined by CCIT recommendations I.430 and I.441. The LSI also contains input/output functions that enable it to be directly connected to a layer-3 microprocessor. This LSI's functional specifications, configurat... View full abstract»

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  • Interconnecting heterogeneous networks to OSI with a global name scheme and gateway address mapping

    Publication Year: 1988, Page(s):247 - 251
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The ongoing development of the OSI standards for computer communication prompts existing networks to provide OSI interconnectivity. Achieving this requires two mechanisms: a global scheme to name applications, and specific solutions to provide internetwork addressability between applications. The problem of identification of remote resources across between two networks is considered. A solution is... View full abstract»

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  • Multipoint communication control for document-oriented teleconferencing

    Publication Year: 1988, Page(s):29 - 35
    Cited by:  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The authors describe a multipoint document-oriented teleconferencing system, which is called the audio document teleconferencing system (ADCS). The multipoint communication node is composed of a graphic signal distribution module (GDCM) and an audio signal distribution module (ADCM). The system is based on a token ring network, and the token contention control and related protocols are discussed i... View full abstract»

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  • Evolving high speed packet capabilities in a distributed switching system

    Publication Year: 1988, Page(s):87 - 92
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    A brief description is given of the principles outlined in CCITT recommendation X.31, which constitutes the first point of reference for the integration of packet services in the narrowband integrated-services digital network (ISDN). The architectural problems that arise when trying to integrate the new narrowband and broadband packet services into ISDN. Remarks are made concerning ISDN developmen... View full abstract»

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  • ALICE: a layer independent conformance equipment

    Publication Year: 1988, Page(s):147 - 154
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    In parallel with standardization work in the area of communication software, the interest is rapidly growing for testing methods and tools to assess that protocol implementations conform to the relevant standards and are capable of interworking with other products. A description given of a testing system named ALICE (a layer independent conformance testing), the main feature of which is to be as i... View full abstract»

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  • MHS conformance testing [message handling]

    Publication Year: 1988, Page(s):131 - 138
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Worldwide activities related to conformance testing of X.400 message-handling systems are discussed. The test laboratories and test tools are described. Technical and operation problems that are being encountered and their solutions are examined View full abstract»

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  • Stepwise specification of a sliding-window protocol by means of process algebra

    Publication Year: 1988, Page(s):109 - 114
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    The author introduces a simple language, a subset of the formal language LOTOS, expressive enough to describe a wide range of communication behavior. He shows the applicability of this specification language to a sliding-window protocol taken from the literature. The specifications start with the definition of the service of the protocol. The underlying service is precisely defined, giving the fra... View full abstract»

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  • Evolution of switch architecture and technology

    Publication Year: 1988, Page(s):185 - 190
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The authors examine the evolution of switching systems from the very rigid structure of a step-by-step system to the open-ended capabilities of a switch of the 1990s. They discuss the separation of call control from connection control, fast switching technologies, and network integration. They show that a multiconnection switch fabric architecture with integrated call control gives the most flexib... View full abstract»

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  • Non-blocking copy networks for multicast packet switching

    Publication Year: 1988, Page(s):221 - 229
    Cited by:  Papers (17)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    A nonblocking, self-routing copy network with constant latency is proposed. Packet replications are accomplished by two fundamental processes: encoding and decoding. The encoding process transforms the set of copy numbers, specified in the headers of incoming packets, into a set of monotone address intervals that form new packet headers. This process is carried out by a running adder network and a... View full abstract»

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  • A multi-media network architecture for ISDN and beyond

    Publication Year: 1988, Page(s):63 - 70
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    The author discusses an evolution and growth in structure of telecommunications networks to provide enhanced services and permit potential simplification of network operation and management. The approach he suggests offers numbering flexibility/portability, unrestricted network dimensioning and provides unification of signaling for existing and new applications. Network evolution involves structur... View full abstract»

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  • Security services in telecommunications networks

    Publication Year: 1988, Page(s):45 - 52
    Cited by:  Patents (72)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    The issues that are relevant to computer security and communications security are reviewed, including security architecture and cryptography. Possible solutions for security management functions that are compatible with present and future telecommunications networks standardized by CCITT are described. European cooperation is briefly considered View full abstract»

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