Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services

2-5 Dec. 1991

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  • IEEE Global Telecommunications Conference. GLOBECOM '91. Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services (PCS). Conference Record (Cat. No.91CH2980-1)

    Publication Year: 1991
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    Freely Available from IEEE
  • Jitter and bandwidth enforcement

    Publication Year: 1991, Page(s):261 - 265 vol.1
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB)

    Cells arriving at an ATM (asynchronous transfer mode) network experience random delays due to queuing in upstream multiplexing stages. The alteration of the initial periodic nature of a constant bit rate cell stream due to such delays is the phenomenon of jitter. An assumption of Markovian dependence between the delays of successive cells makes it possible to calculate various quantities of intere... View full abstract»

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  • Transmission of SDH signals through future satellite channels using 16-ary QAM technique

    Publication Year: 1991, Page(s):510 - 514 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    The authors discuss the possibility of transmitting synchronous digital hierarchy (SDH) signals through two-link nonlinear satellite channels. Transmitting such high-bit-rate signals through standard 54-MHz transponder bandwidth requires the use of high-level modulation schemes. The techniques and technologies needed to make the use of 16-ary QAM (quadrature amplitude modulation) transmission feas... View full abstract»

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  • Optical communications in RACE

    Publication Year: 1991, Page(s):1515 - 1516 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (76 KB)

    Summary form only given. The European Community is undertaking a major effort in research and development of advanced communications technologies including fiber-optic communication for integrated broadband networks. In recognition of the vital importance of effective communication services to Europe's economic and social development, the European Economic Community has launched a joint effort, th... View full abstract»

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  • Adaptive equalization with RLS-MLSE for frequency-selective fast fading mobile radio channels

    Publication Year: 1991, Page(s):548 - 552 vol.1
    Cited by:  Papers (18)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    The authors propose a novel adaptive equalization scheme which is a combination of the recursive least squares adaptive algorithm and maximum likelihood sequence estimation (RLS-MLSE). The performance of the scheme is demonstrated in frequency-selective fast fading mobile radio channels. RLS-MLSE employs a parallel estimation scheme in which the state of the channel is estimated by the Viterbi alg... View full abstract»

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  • Base station networking in personal communications

    Publication Year: 1991, Page(s):1912 - 1916 vol.3
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    The author considers a mesh base station network with a slotted-ring protocol. The mesh topology provides clock distribution important to time division multiple access (TDMA) or frequency division multiple access (FDMA) radio channel utilization. The slotted-ring protocol provides a simple interface to TDMA or FDMA radio channels. Other issues including traffic synchronization during handover, fai... View full abstract»

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  • Field experience with fiber-in-the-loop systems: reliability performance

    Publication Year: 1991, Page(s):584 - 589 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The authors address reliability issues from the perspective of accumulated experience with first-generation fiber-in-the-loop systems which have been serving customers for over three years. This experience indicates that the reliability of the service delivered by these systems, which depends on the quality built into them through quality assurance in the design and manufacturing processes and on ... View full abstract»

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  • A broadband packet transport network

    Publication Year: 1991, Page(s):1712 - 1716 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The author explores the constraints on an intelligent distributed network. The control protocol and the network elements introduced provide the required reliability, flexibility, and efficiency for broadband packet transport. The focus is on the transport function of a broadband packet network. Benchmarks offered by the network architecture are inexpensive virtual private networks, self-initializi... View full abstract»

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  • Some experiments on vector quantization using neural nets

    Publication Year: 1991, Page(s):135 - 139 vol.1
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Some applications of neural network algorithms for the design of vector quantizer codebooks are presented. Vector quantization has been applied to the problem of displaying natural images with a reduced set of colors (color palette) and to the interframe coding of image sequences. Self-organizing feature maps and competitive learning (CL) algorithms have been used for the codebook design and their... View full abstract»

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  • Analysis of a broad band packet network with rate based network access control

    Publication Year: 1991, Page(s):324 - 330 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The author develops analytic models to analyze the performance of a broadband packet networks using a new rate-based network access control known as the distributed source control (DSC). The waiting time distribution at each queue is determined, as well as the size of the end-to-end window necessary to achieve a given throughput. The optimum rate or throughput in the sense of minimizing the networ... View full abstract»

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  • A new solution technique for discrete queueing analysis of ATM system

    Publication Year: 1991, Page(s):358 - 364 vol.1
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The authors present a general solution technique for the discrete-time queuing analysis of ATM (asynchronous transfer mode) systems. The traffic is characterized as an r-dependent Markov modulated phase-type process, and the queue is assumed to have finite capacity and multiple servers with fixed service time. The queue is functionally modeled as a nonlinear feedback loop and a procedure ... View full abstract»

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  • A multi-carrier group demodulator with chirp transform for personal/mobile system communication

    Publication Year: 1991, Page(s):543 - 547 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A multicarrier transmission system using a bit-by-bit frequency hopping scheme with maximum likelihood error correction is proposed for high-quality personal/mobile communication systems. In the system, a group demodulator with a chirp transform for detecting high-speed hopping signals is adopted for a base station demodulator, resulting in hardware reduction by the use of a common single circuit.... View full abstract»

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  • Internetworking: the key PCS success factor

    Publication Year: 1991, Page(s):1904 - 1911 vol.3
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The personal communication service proposed aims at providing the most value to end users and service providers in a competitive marketplace. It was designed around a set of basic conditions-ubiquity, uniformity, community of interest, public addresses, price/value packaging-that have proven their worth with another highly successful communication service, POTS. The whole version is predicated on ... View full abstract»

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  • Congestion control in ATM networks

    Publication Year: 1991, Page(s):1082 - 1088 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A multifaceted congestion control technique is proposed for asynchronous transfer mode (ATM) broadband integrated services digital networks (B-ISDN). This technique is consistent with the framework outlined in the US contribution to the CCITT standards organization and is based on separating traffic into classes. For continuous-rate services, controls based on bandwidth allocation are specified. T... View full abstract»

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  • An algorithm to design a multiple-channel communications system

    Publication Year: 1991, Page(s):515 - 520 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    The authors present a novel algorithm to design a phase-modulated residual carrier communications system for optimum performance. The algorithm has been developed as an aid in the design of two telemetry data channels operating simultaneously with a turn-around ranging signal. The algorithm provides the selection of an optimum subcarrier frequency and modulation indices for minimizing the mutual i... View full abstract»

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  • Performance of technical options to enhance reliability and availability in fibre-based local access connections

    Publication Year: 1991, Page(s):578 - 583 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The authors consider technical options aimed at enhancing the reliability and availability of fiber-based local access connections (between local exchange and customer premises). Attention is paid both to point-to-point business connections and to point-to-multipoint fiber to the curb residential connections. The various alternatives are compared from the end-to-end channel availability point of v... View full abstract»

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  • Effect of contention resolution rules on the performance of deflection routing

    Publication Year: 1991, Page(s):1706 - 1711 vol.3
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    The authors investigate the effect of contention resolution (CR) rules on the performance of deflection routing. A new livelock-free prioritized CR rule, which is based on a packet's distance to the destination and the number of deflections suffered by it, is proposed. The performance-in terms of the average throughput, the average network delay and the delay distribution-of this CR rule is compar... View full abstract»

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  • Analytical representation of generalized MSK signals and coherent receiver design criterion

    Publication Year: 1991, Page(s):67 - 71 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A significant, exact representation of generalized MSK signals is proposed, whatever the modulation pulse-shaping waveform, which is assumed to be included in a time range equal to LT, T=symbol time. This representation shows that the complex envelope of the generalized MSK signal is a combination of various functions, dependent on the modulation pulse shaping which are suitably ... View full abstract»

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  • A neural network approach to the maximum flow problem

    Publication Year: 1991, Page(s):130 - 134 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Previous attempts to solve the maximum flow problem for the general multicommodity case have ended up with a linear programming formulation, in which the solution technique, based on the simplex algorithm, suffers from excessive storage and running time requirements, especially for large networks. An attempt is made to show how to apply neural network optimization techniques to solve the resulting... View full abstract»

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  • Charging in cordless telecommunication systems

    Publication Year: 1991, Page(s):319 - 323 vol.1
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    The author describes the possibility of supporting charging information transfer both to the user in a cordless telecommunication system connected to a network with advanced functionalities and in the system to which the user is connected. She describes how charging information can be handled in a system where the number of bearers and supplementary services used varies during a call. The basic pr... View full abstract»

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  • Wideband frequency and time domain models for the indoor radio channel

    Publication Year: 1991, Page(s):1135 - 1140 vol.2
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Time-domain and frequency-domain statistical models for computer simulation of fading multipath indoor radio channels are compared. In the time-domain model, the channel pulse-response is formed by addition of several pulses arriving at the receiver from different paths. In the frequency-domain model, the frequency response of the channel is modeled as an autoregressive (AR) process identified by ... View full abstract»

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  • Adjunct based operations of digital loop carrier technology in an intelligent network

    Publication Year: 1991, Page(s):1656 - 1660 vol.3
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    The remote digital loop carrier (DLC) network element is a natural platform for the deployment of network access technologies necessary to support advanced network services in the intelligent networks (INs) of today and beyond. The author takes an operations view of the insertion of intelligent DLC elements into today's network of embedded switches and operations systems (OSs,). First, the charact... View full abstract»

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  • Performance management in SONET-based multi-service networks

    Publication Year: 1991, Page(s):1406 - 1411 vol.2
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    A performance management scheme is introduced to satisfy end-to-end performance requirements of multiclass services, using a nested control scheme. The network-level controller periodically computes an optimal bandwidth allocation policy for the entire network, and downloads parameters to the call- and packet-level controllers to regulate network traffic accordingly. The call-level controller limi... View full abstract»

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  • An approach to characterizing response time based on queue-length probabilities in queueing systems

    Publication Year: 1991, Page(s):352 - 357 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A technique is proposed for characterizing the response (or waiting) times in terms of probability distribution function or percentiles (e.g. 95th percentiles), given the set of queue-length probabilities. This approach makes use of the Laguerre functions to approximate the distribution functions. A numerical study has been conducted to validate the approach. The high accuracy of the numerical res... View full abstract»

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  • Multiple channel inhibit sense multiple access with capture

    Publication Year: 1991, Page(s):536 - 542 vol.1
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The throughput and delay of the uplink of a metropolitan area packet radio network employing nonpersistent, multiple-channel inhibit-sense-multiple-access (MC-ISMA) with capture are investigated using analysis and discrete event simulation. Both nonslotted and slotted MC-ISMA protocols are shown to produce improvements in throughput of up to 400% compared to the respective ISMA protocols using mul... View full abstract»

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