Networks, 1993. International Conference on Information Engineering '93. 'Communications and Networks for the Year 2000', Proceedings of IEEE Singapore International Conference on

6-11 Sept. 1993

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  • Design and implementation of an OSI conformance test system considering extensions for interconnectability testing

    Publication Year: 1993, Page(s):665 - 669 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (463 KB)

    There is a wide perception of the need for conformance and interoperability testing to ensure the interoperability of open systems. In the circumstances, the authors have been making efforts to establish a system for interconnectability testing, which is a type of interoperability testing. In this paper, they discuss an interconnectability testing architecture that they have developed, and also a ... View full abstract»

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  • Test generation for the distributed test architecture

    Publication Year: 1993, Page(s):670 - 674 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (455 KB)

    ISO (International Standardization Organization) developed the ISO distributed test architecture for testing layered protocols. Furthermore, a general distributed test architecture where the IUT (implementation under test) contains several distributed ports is used for testing distributed systems, based on the Open Distributing Processing (ODP) Basic Reference Model (BRM). In this architecture, th... View full abstract»

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  • Multicasting on certain self-similar networks

    Publication Year: 1993, Page(s):685 - 689 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (486 KB)

    Both the linear recursive networks and the hypercubic networks are known to be self-similar in their interconnection topologies. Here it is shown that multicasting can be efficiently performed on these networks. View full abstract»

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  • Author's index

    Publication Year: 1993
    Request permission for commercial reuse | PDF file iconPDF (243 KB)
    Freely Available from IEEE
  • A low-delay hybrid vector excitation linear predictive speech coding scheme

    Publication Year: 1993, Page(s):867 - 871 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The authors study a hybrid approach in determining the excitation vector in a low-delay code excited linear predictive coder. By a judicious division of the composite excitation vector into long-term and short-term components, and the use of switched quantisation, substantial improvement in coding quality is obtained. In addition, the use of an adaptive postfilter which incorporates both the envel... View full abstract»

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  • Performance evaluation of adaptive load balancing policies in distributed systems

    Publication Year: 1993, Page(s):606 - 611 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    This paper compares and evaluates various adaptive load balancing policies under the practical conditions by using simulation methods. The authors take account of the cost of collecting and reacting to state information and the dynamic delay caused by the congestion of network traffic as well as the cost of process migration. Their results provide convincing evidence that the benefit of several ad... View full abstract»

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  • ACE-QPSK: a new method of coding QPSK for the nonlinear transmitter

    Publication Year: 1993, Page(s):862 - 866 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    Band-limited QPSK signals are prone to a high degree of spectral regrowth when nonlinearity is present in the transmitter amplifier. In a multi-carrier application with close adjacent channels (such as an FDMA satellite system), the spectral regrowth of adjacent channels can result in severe interference with the desired carrier. This may lead to substantial BER performance degradation or make nec... View full abstract»

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  • A comparison of trellis coded SSMA systems over fading channels using pragmatic and Ungerboeck encoder structures

    Publication Year: 1993, Page(s):708 - 712 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This paper compares the performance of a trellis coded spread spectrum multiple access system using two forms of encoder structures. Performance in additive white Gaussian noise and Rician fading channels is investigated. Degradation in the system performance due to interuser interference is modelled using the method of moments, since normal bounding techniques cannot be used. Results are given fo... View full abstract»

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  • Segmented approach for lossless compression of medical images

    Publication Year: 1993, Page(s):554 - 557 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    This paper describes the studies on methods of lossless compression for medical ultrasonic scanned image (echocardiography) sequences. The aim is to find one, or a combination of methods, that achieves the highest overall compression performance. The approach is to segment the image into regions with different spatial characteristics, and encode them independently. In so doing the authors are able... View full abstract»

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  • TRUMP-a fast reliable transport protocol for distributed systems

    Publication Year: 1993, Page(s):601 - 605 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Traditional transport protocols such as TCP and TP4 were not designed to be used in distributed systems; they also fail to support the high speeds and low error rates of current high speed networks such as FDDI. Various protocols, such as VMTP, RRDP, NET-BLT and XTP have suggested ways of supporting distributed systems and/or high speed networks. However, none of them have fully supported both dis... View full abstract»

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  • Scalability analysis of inter-domain routing protocols

    Publication Year: 1993, Page(s):857 - 861 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    With the rapid growth in internetwork connectivity, it is becoming increasingly important to contain the overheads associated with inter-domain routing protocols. This paper analyses and compares storage, route computation and communication overheads of existing protocols for inter-domain routing View full abstract»

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  • Performance evaluation under noisy environment

    Publication Year: 1993, Page(s):705 - 707 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    Performance evaluation of computer systems has been done in many papers but not many have used a network communication model. This paper aims to address the throughput performance and message delay pattern under noisy environment with adaptive packet length. Three common protocols, stop and wait, ARQ and selective reject are chosen. The theoretical deduction taking into account the possibility of ... View full abstract»

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  • Reduced state computation of distance spectrum for certain optimal convolutional codes

    Publication Year: 1993, Page(s):786 - 790 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    For the class of rate 1/2 N-state linear convolutional codes with complementary structure, which includes all of the presently known optimal codes, the authors show that no more than 3N/4 states are required to compute dfree and the distance spectrum. Similar state reductions can also be achieved (although to a smaller extent) for rate 1/n codes, ... View full abstract»

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  • Experiments with randomized and deterministic routing algorithms on transputer networks

    Publication Year: 1993, Page(s):690 - 694 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    An interprocessor communication scheme is a key to exploit parallel computers effectively. One of the efficient communication schemes on hypercubes is the two-phased randomized routing algorithm. In this paper, the performance of this randomized routing algorithm is studied. In addition, the performance of a deterministic routing algorithm, the greedy routing algorithm is evaluated View full abstract»

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  • Performance evaluation of two interconnected DQDB MANs

    Publication Year: 1993, Page(s):549 - 553 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The primary service which will be provided by broadband networks in the metropolitan or regional area will be directed to LAN interconnection for business and research users. Work has been aimed at the analysis of different access methods (MAC protocols) suitable for high speed and higher round trip delay networks such as metropolitan area networks (MAN). Since they will represent the first techni... View full abstract»

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  • Reliability-oriented system design and analysis on computer networks

    Publication Year: 1993, Page(s):776 - 780 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Distributed task allocation plays an important role in designing a reliable distributed system. Some previous work concerning the reliability evaluation of distributed systems showed that the distribution and redundancy of programs and data files affect the reliability of a distributed system significantly, and hence the reliability-oriented distributed task assignment has become a widely discusse... View full abstract»

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  • Optical compound pulse time modulation for analogue fibre transmission

    Publication Year: 1993, Page(s):630 - 634 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Compound pulse time modulation (CPTM) techniques represent an attractive alternative approach for multiplexing pulse time modulation (PTM) signals. This paper reports an experimental CPTM system based on combining pulse interval modulation and pulse width modulation for transmitting analogue signal over optical fibre cable employing a 1300 nm ELED. Signal to noise ratios of 40 dB have been achieve... View full abstract»

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  • A communication switch based on parallel processing

    Publication Year: 1993, Page(s):757 - 760 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Telecommunication switches have been implemented based mainly on centralized and distributed control. Centralized control is relatively easy to implement but suffers from limitations on real-time capability. Distributed control involves much higher software complexity and intensive messaging. This paper proposes the parallel processing approach to simplify these problems. A system is under develop... View full abstract»

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  • A connection-mode network service relay functional specification

    Publication Year: 1993, Page(s):596 - 600 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    Functional standardization activities in ISO and in regional workshops are currently addressing end-system profiles and network layer relay profiles for the interconnection of several types of subnetworks. In order to achieve end-system interconnectivity, connection-mode network layer relays appear as one of the key pieces of the Open Systems Interconnection puzzle. In this paper the authors prese... View full abstract»

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  • An optimal neural routing algorithm

    Publication Year: 1993, Page(s):852 - 856 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    This paper describes a routing algorithm that uses the Hopfield neural algorithm. This algorithm takes into account the shortest path and link capacity and calculates the connections and weights of the neural network which will provide an optimum transmission path from source node to destination node. The minimization procedure is implemented using a modification of the neural network travelling s... View full abstract»

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  • Call repacking and trunk reservation

    Publication Year: 1993, Page(s):700 - 704 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    The authors investigate the benefits of call repacking when used alone and when used together with trunk reservation. They are interested in an environment that is connection-oriented and with resource reservation. They propose an analytical model and use simulations to verify their results View full abstract»

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  • A study on TCM decoder performance for PSK, PAM, QAM in the Gaussian and impulsive noise channel

    Publication Year: 1993, Page(s):791 - 795 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    Previously, a TCM decoder has been using the Viterbi algorithm whose decoding process was complex. In order to reduce the complexity, the authors propose the `modified decoding algorithm using the path back method', and the modified decoding algorithm extends the previous decoding algorithm to be able to be applied to the TCM decoder. Monte-Carlo simulation is used for analyzing the TCM performanc... View full abstract»

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  • Requirement analysis for next generation electronic mail systems

    Publication Year: 1993, Page(s):735 - 739 vol.2
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    This paper examines the design requirements for constructing a next generation multimedia electronic mail system in contrast to existing ASCII-text mail systems. The design and implementation of such an electronic mail system are a difficult task as they require extensive use of various techniques for accommodating retrieval, indexing, query processing, user interface and storage of multimedia dat... View full abstract»

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  • Efficiency issues of polling protocols for Fieldbus networks

    Publication Year: 1993, Page(s):821 - 826 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    This paper considers polling protocols for industrial local area networks. Such networks are employed in process control and manufacturing. They operate in the presence of hard real-time constraints. The authors present two protocols for these networks and discuss implementation issues related to their efficiency and jitter. The efficiency indicates how best the available network bandwidth can be ... View full abstract»

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  • Modelling communication protocols using deductive systems

    Publication Year: 1993, Page(s):675 - 679 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Modelling a protocol is difficult because it involves describing a two-dimensional relationship between the flow of control of many processes and the synchronized flow of data between those processes. This paper presents the use of a new technique, Deductive Systems, for the modeling of communication protocols. The strengths of using such approach for protocol modeling are the ease with which mode... View full abstract»

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