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IEE Proceedings - Communications

Issue 56  Part 6 • Date 2002

 This issue contains several parts.Go to:  Part Supplement 

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Displaying Results 1 - 10 of 10
  • Fault localisation and recovery in multichannel ATM switches

    Publication Year: 2002, Page(s):283 - 291
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (617 KB)

    One of the important advantages of multichannel switches is the incorporation of inherent fault tolerance into the switching fabric. For example, if a link which belongs to the multichannel group fails, the remaining links can assume responsibility for some of the traffic on the failed link. On the other hand, faults occurring in the switching elements can lead to erroneous routing and sequencing ... View full abstract»

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  • Multirate asynchronous optical CDMA system with product code

    Publication Year: 2002, Page(s):299 - 304
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    The authors propose a new architecture for a multirate asynchronous optical CDMA (code division multiple access) system. An optical orthogonal code (OOC) is employed as the signature sequence. The serial multirate data is converted into parallel information bits and then transmitted simultaneously via spatial channels. Exploiting the essence of parallel transmission of spatial channels, the produc... View full abstract»

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  • Modelling of a VSAT link physical layer fade countermeasure controlled at the data link layer

    Publication Year: 2002, Page(s):277 - 282
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (493 KB)

    A satellite data communication link with fade countermeasures applied at the physical layer, in the form of adaptive modulation and forward error correction coding, will only perform as well as governed by the way in which the inherent system adaptivity is controlled. By considering the controlled quality attribute to be the error-free frame throughput of the link, the place where the control happ... View full abstract»

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  • IP routing by an optical spectral-amplitude-coding CDMA network

    Publication Year: 2002, Page(s):265 - 269
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (458 KB)

    An optical spectral-amplitude-coding CDMA network is proposed as a solution to the IP routing bottleneck in the global Internet. Its performance has been analysed for two different cases. For a given peak bit rate the network performance can be improved by reducing channel utilisation. However, when each user in the network has a fixed average bit rate, an optimal utilisation exists for the overal... View full abstract»

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  • Collision resolution in contention access local area networks using concatenated prime sequences

    Publication Year: 2002, Page(s):249 - 256
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (576 KB)

    A new back-off algorithm for collision resolution in CSMA/CD local area networks is introduced. The algorithm, called the 'concatenated prime sequence back-off algorithm', is a code-division multiple-access technique based on multilevel prime sequences. Preliminary simulation results have shown the superiority of the proposed algorithm over the binary exponential back-off algorithm used in Etherne... View full abstract»

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  • QoS-guaranteed fuzzy transmission controller for dynamic TDMA protocol in multimedia communication systems

    Publication Year: 2002, Page(s):292 - 298
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (550 KB)

    The paper proposes a QoS-guaranteed fuzzy transmission controller (FTC) for the dynamic TDMA protocol in multimedia communication systems. The the dynamic TDMA protocol adopts a mini-slot technique for reducing contention cost, and the mini-slots are further partitioned into multiple MAC regions that users can access with their respective quality-of-service (QoS) requirements. The FTC mainly conta... View full abstract»

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  • Markov decision theory framework for resource allocation in LEO satellite constellations

    Publication Year: 2002, Page(s):270 - 276
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (560 KB)

    The authors address the problem of call admission and route selection for connection-oriented networks with deterministically varying topology, such as low-Earth orbit (LEO) satellite constellations. They direct their study to non-reservation routing schemes, i.e. where the use of channel reservation strategies for handover calls is omitted. The problem is formulated as a semi-Markov decision proc... View full abstract»

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  • Multiple additively constrained path selection

    Publication Year: 2002, Page(s):237 - 241
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (417 KB)

    Finding a feasible path subject to multiple constraints in a network is an NP-complete problem and has been extensively studied. However, current algorithms suffer either high computational complexity or low success ratio in finding feasible paths. The authors propose a novel extended Bellman-Ford algorithm (EB), from which they present a high-performance algorithm with low computational complexit... View full abstract»

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  • Neural approach to detecting communication network events

    Publication Year: 2002, Page(s):257 - 264
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (540 KB)

    The Internet and associated network technologies are an increasingly integral part of modem day working practices. With this increase in use comes an increase in dependence. For some time, commentators have noted that given the level of reliance on data networks, there is a paucity of monitoring tools and techniques to support them. As this area is addressed, more data regarding network performanc... View full abstract»

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  • Subsets of the STM-1 frame-alignment signal: a monitoring analysis

    Publication Year: 2002, Page(s):242 - 248
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    A novel approach to frame-alignment monitoring considers splitting the frame-alignment signal into its independent subsets, making the evaluation of the out-of-frame detection time within the overlap zone quite complex. The paper proposes a simplified model for this evaluation. An STM-1 framing signal is used as an illustrative example and it is pointed out that its repetitive structure is not sui... View full abstract»

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