Global Telecommunications Conference, 1993, including a Communications Theory Mini-Conference. Technical Program Conference Record, IEEE in Houston. GLOBECOM '93., IEEE

Nov. 29 1993-Dec. 2 1993

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  • Proceedings of GLOBECOM '93. IEEE Global Telecommunications Conference

    Publication Year: 1993
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    Freely Available from IEEE
  • Acquisition performance evaluation for fully digital receivers in a band-limited DS-SS CDMA system

    Publication Year: 1993, Page(s):54 - 58 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (363 KB)

    CDMA digital modems, utilising DS SS, are currently being implemented for VSAT as well as for mobile and personal communications via satellite. A fundamental aspect for such terminals is the code synchronization and initial acquisition. This paper introduces an analytical formulation to evaluate the performance of the acquisition system in a fully digital modem. The analysis takes into account the... View full abstract»

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  • Design and implementation of a configuration management system

    Publication Year: 1993, Page(s):1563 - 1567 vol.3
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (541 KB)

    The author has designed and implemented a configuration management system, which is based on the CMISE service. It provides several functions to configuration management users such as getting information about network resources, re-configuration of a managed network and so on. The author has introduced the network management domain concept and the object-oriented approach for defining managed obje... View full abstract»

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  • Implementation of a police criterion calculator based on the leaky bucket algorithm

    Publication Year: 1993, Page(s):713 - 718 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The usage parameter control (UPC) function for a broadband ATM network is essential for guaranteeing a certain quality level. Though no single UPC algorithm has been standardized, the leaky bucket algorithm is one of the favoured algorithms as it can account for cell delay variation. As each connection has to be enforced separately, a large number of independent leaky buckets is needed for a singl... View full abstract»

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  • QoS management and performance monitoring in ATM networks

    Publication Year: 1993, Page(s):708 - 712 vol.2
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The purpose of this paper is to study quality of service (QoS) management and performance monitoring issues in B-ISDN. A QoS framework is proposed in order to satisfy the user's service quality requirements. The basic idea of this QoS framework is that the user's QoS requirement should be represented in terms of objectives set to QoS parameters which are in turn translated into asynchronous transf... View full abstract»

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  • Characterization of packetized voice traffic in ATM networks using neural networks

    Publication Year: 1993, Page(s):996 - 1000 vol.2
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    Asynchronous transfer mode (ATM) broadband networks support a wide range of multimedia traffic (e.g. voice, video, image and data). Accurate characterization of the multimedia traffic is essential in ATM networks, in order to develop a robust set of traffic descriptors. Such a set is required by the ATM networks for the important functions of traffic enforcement (policing) and bandwidth allocation... View full abstract»

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  • PHOTON: a software system for SONET interoperability analysis

    Publication Year: 1993, Page(s):666 - 670 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    SONET is a standard for fiber-optics equipment. One of the main reasons for developing SONET was interoperability: the ability of network elements from different suppliers to work with each other. In the past, however, compliance of equipment to standards has not always guaranteed interoperability. Thus, it is important to determine whether there are conditions under which interoperability cannot ... View full abstract»

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  • Dynamic program updating in packet switching systems

    Publication Year: 1993, Page(s):703 - 707 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Program updating in switching systems is becoming more frequent because of the addition of new facilities or the modification of existing facilities. In program updating, however, several problems exists. These problems include service interruption or stoppage; some approaches against them have been proposed. Another problem for packet switching systems is packet loss. We discuss the difficulties ... View full abstract»

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  • Traffic prediction using neural networks

    Publication Year: 1993, Page(s):991 - 995 vol.2
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Broadband ISDN has made possible a variety of new multimedia services, but also created new problems for congestion control, due to the bursty nature of traffic sources. Lazar and Pacifici (1991) showed that traffic prediction is able to alleviate this problem. The traffic prediction model in their framework is a special case of the Box-Jenkins ARIMA model. In this paper, we propose a neural netwo... View full abstract»

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  • Interoperability overhead in OSI communication networks

    Publication Year: 1993, Page(s):661 - 665 vol.1
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Abstract/transfer syntaxes are used in the presentation layer of OSI communication networks to achieve data interoperability among heterogeneous nodes. In the paper, the authors describe their performance evaluation experiments to evaluate the overhead of ASN.1 and other similar syntaxes in communications networks. The tests used protocol data units (PDUs) of an actual real-time application. The o... View full abstract»

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  • Improvements in service quality due to the introduction of fiber-optic radio micro-cellular system

    Publication Year: 1993, Page(s):697 - 702 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    Fiber-optic systems, when deployed in subscriber loops, can drastically improve network capabilities. At the same time, service applications that are feasible and attractive for users are not so many at present. To cope with this, a fiber-optic transmission system for linking radio base stations to the mobile communication center is developed and its performance is evaluated. The introduction of t... View full abstract»

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  • Asynchronous timing recovery for passband PS-FSE for single-chip V.32 modems

    Publication Year: 1993, Page(s):614 - 620 vol.1
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    In single chip V.32 modems (full duplex) there are two clocks that must be synchronized: the near-end and the far-end clock. However, a single chip implementation has only a single clock. In the present design the transmit data is generated and echoes cancelled synchronously using the near-end clock. Far-end data is generated from the far-end clock and thus for successful demodulation the far-end ... View full abstract»

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  • Comparison of coded and uncoded QPSK intradyne and heterodyne receivers

    Publication Year: 1993, Page(s):1891 - 1895 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Without the requirement for optical phase synchronization, the QPSK intradyne receiver provides a way to minimize the processing bandwidth of the optical receiver by reducing the intermediate frequency (IF) to a level that it is lower than the symbol frequency of the QPSK signal. As a result, with a low processing bandwidth, the QPSK intradyne scheme allows the use of a digital demodulating circui... View full abstract»

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  • Adaptive map configuration and dynamic routing to optimize the performance of a satellite communication network

    Publication Year: 1993, Page(s):986 - 990 vol.2
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    It is demonstrated that the performance of a satellite network can be optimized by changing its facilities. A mesh-connected, circuit-switched satellite communication network is shown to perform better by adaptively reconfiguring the network by using simulated annealing to suit the current traffic conditions. Proper allocation of link capacities and placing an optimal reservation scheme for the ne... View full abstract»

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  • AMS: an integrated simulator for open systems

    Publication Year: 1993, Page(s):656 - 660 vol.1
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    The main objective of the OSISIM project (Open System Integrated Simulator) is to set up an atelier for the modeling of communication networks and the analysis of their performances. The atelier gives the end-user powerful tools to edit a communication system in a graphical environment. The representation of a system to be simulated is based on models of several standard networks available in the ... View full abstract»

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  • A large-scale multicast output buffered ATM switch

    Publication Year: 1993, Page(s):34 - 41 vol.1
    Cited by:  Papers (10)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The paper proposes a recursive modular architecture for implementing a large-scale multicast output buffered ATM switch (MOBAS). Many proposed multicast switch architectures have a size limitation problem because their switches use either (1) a centralized processing unit for cell replication and routing, (2) a shared medium for cell transmission and storage, or (3) an irregular interconnection ne... View full abstract»

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  • Facsimile service quality issues and an objective evaluation methodology on image quality degradation

    Publication Year: 1993, Page(s):692 - 696 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    This paper discusses issues related to facsimile service quality, summarizes technical points to be studied, and describes the results of a customer survey. It also presents a new method for objectively evaluating customer ratings of facsimile images containing scan line errors. A simple mathematical model is proposed that can predict the mean opinion score for image quality with respect to the sc... View full abstract»

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  • An analysis of the effects of power control error within a direct sequence CDMA system for mobile radio

    Publication Year: 1993, Page(s):924 - 928 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Direct sequence (DS) code division multiple access (CDMA) systems have previously been proposed as a high capacity multiple access technique for cellular mobile radio (Gilhousen et al. 1991). However, in order to maximise the number of users which may operate within this type of system it is necessary to jointly optimise the apparent signal to noise ratio (SNR) of each system user. This may be ach... View full abstract»

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  • A new selective retransmitted ARQ system

    Publication Year: 1993, Page(s):1815 - 1821 vol.3
    Cited by:  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    A partly repeated ARQ error control system of combining continuous transmission pattern with stop-and-wait (SW) ARQ pattern is considered. The system transmits data by means of a half-duplex channel. It can save the frequency-band or channel requirements compared with the GBN ARQ strategy, while its throughput is much higher than that of SW ARQ strategy and approximates to the throughput of the GB... View full abstract»

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  • A fully digitized multi-level demodulator for high-capacity digital radio systems

    Publication Year: 1993, Page(s):609 - 613 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Proposes a new configuration for a fully digitized multi-level demodulator for application in high-capacity digital radio systems from the view points of small circuit scale and low sampling rate. The configuration is based on estimates of the performance of the digitized detector and timing filter by computer simulation. To implement the digitized detector, the authors build a Detector-LSI (DET-L... View full abstract»

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  • Winning in telecommunications with software TQM

    Publication Year: 1993, Page(s):493 - 497 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    Today's telecommunications networks and the services offered to network subscribers are becoming increasingly dependent on software. Therefore, one of the major initiatives of telephone companies is the deployment of high quality software systems. To this end, total quality management of software systems is essential. Poor quality software is not only expensive in dollars, but also in intangibles ... View full abstract»

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  • An algorithm for burst reservation packet service

    Publication Year: 1993, Page(s):893 - 897 vol.2
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Assumes an integrated fast-packet environment that recognizes two kinds of transport services: low delay tolerant isochronous transport and bursty variable-bandwidth transport with some delay tolerance. To deal with both but in particular the latter, the authors present an algorithm to implement a burst reservation discipline. The algorithm also addresses the problem of overload occurring when the... View full abstract»

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  • Coherent analog optical links: design, performance and potential applications

    Publication Year: 1993, Page(s):1886 - 1890 vol.3
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Coherent analog optical links offer several important advantages over conventional direct detection links: better receiver sensitivity, possible use of angle modulation and easy separation of WDM signals and frequency translation. We propose a novel coherent AM-WlRNA optical link, and analyze and optimize its performance. With proper system design, the coherent AM link is insensitive to the laser ... View full abstract»

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  • A channel-optimized predictive speech coder

    Publication Year: 1993, Page(s):980 - 985 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    A method for channel-optimized vector quantization of the predictor coefficients and the residual signal of a predictive speech coder is presented. Using the residual energy distortion measure for the long-term and short-term predictors and the spectrally weighted squared error distortion measure for the residual signal, an algorithm for channel-optimized vector quantizer and channel detector desi... View full abstract»

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  • Implementing service management control through object models: issues and direction

    Publication Year: 1993, Page(s):653 - 655 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The rise of object modeling for service management control has been nothing less than extraordinary. Standards bodies and industry groups, both regional and international, have adopted the object-oriented paradigm and have made major inroads in developing object models for main areas of service management control. This paper discusses some of the issues faced in implementing object models, startin... View full abstract»

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