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Fifth IEE Conference on Telecommunications 1995

26-29 Mar 1995

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Displaying Results 1 - 25 of 71
  • Personal communication services on a distributed processing environment

    Publication Year: 1995, Page(s):243 - 247
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB)

    Shows part of the work carried out within the PERCOM RACE project. The target is to implement a prototype supporting PSCS (personal service communication space) services on an ATM network using a distributed processing platform to validate the ODP (open distributed processing) methodology and the used TINA-C (Telecommunications Information Networking Architecture Consortium) modeling concepts for ... View full abstract»

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  • Impact of mobility an a pan-European intelligent network a view from Eurescom project P230

    Publication Year: 1995, Page(s):248 - 252
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    The number of services based on intelligent networks (IN) is increasing rapidly in the national markets of most public network operators (PNO). As intelligent network services continue to evolve and prove their value on a national level, and as customer bases expand internationally, there is a natural demand to extend these telecommunications capabilities globally. The increasing complexity makes ... View full abstract»

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  • Solutions for corporate mobile communication

    Publication Year: 1995, Page(s):253 - 257
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (276 KB)

    According to research the majority of all telephone calls fail to reach the intended person. This is a serious problem for organisations. The competitive environment has changed as new technologies have appeared. The availability problem is taking on new significance as time becomes the new competitive criterion. Poor availability generates unnecessary lead-time in otherwise very well calculated b... View full abstract»

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  • Forward error control for future trans-oceanic optical systems

    Publication Year: 1995, Page(s):78 - 82
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    This paper is concerned with an assessment of a range of (forward error control) FEC options appropriate to submarine transmission systems. Both established and novel coding arrangements are considered and promising avenues for further investigation are identified. We first briefly review the currently proposed RS tributary coding arrangement. We then present alternative coding schemes which offer... View full abstract»

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  • An experimental ATM infrastructure

    Publication Year: 1995, Page(s):258 - 261
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (212 KB)

    ATM is a key element of a broadband multi-service network and the variety of standards make modular design an essential feature. The paper outlines an experiment carried out under the RACE Programme and describes the flexible `Canton' ATM switch which was developed, in conjunction with an EISA-based ATM card, to provide the experiment with the necessary networking infrastructure. This low-cost swi... View full abstract»

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  • ATM LAN/LAN bridging connectionless methods performance analyses

    Publication Year: 1995, Page(s):130 - 134
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    Broadband integrated services digital networks (BISDN) are developed to carry all three fundamental media streams: data, voice, and video. The asynchronous transfer mode (ATM) has been adopted by the CCITT as a universal transfer mode for BISDN. ATM offers a connection-oriented communication service based on switched point-to-point physical media. ATM technology is used in campus and in local area... View full abstract»

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  • Corporate telecommunication networks: new trends and main integration issues

    Publication Year: 1995, Page(s):49 - 54
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (448 KB)

    A new and strong interest is arising in Europe on the provision of advanced networking services and features to corporate telecommunication networks customers. The paper provides a description of the factors driving the transition from private networks based on dedicated links (e.g. leased lines) to private networks based on the public shared network. An overview of networking opportunities offere... View full abstract»

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  • Development of high compression HDTV digital codec

    Publication Year: 1995, Page(s):100 - 104
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    A new digital codec is described, which can transmit 1125/60 HDTV signals at a bit-rate of 15 to 45 Mbps in order to cover a wide range of applications such as SNG, distribution or contribution. To achieve satisfactory picture quality at such low bit rates, including high quality stereo sounds, a data channel, a forward error correction code, and new advanced coding techniques are introduced into ... View full abstract»

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  • Linearity requirement for adaptive antennas array transceivers

    Publication Year: 1995, Page(s):327 - 331
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    The use of adaptive antenna in mobile communications base stations is self-explanatory. It offers the potential of increased spectrum efficiency, extended range of coverage and reduced delay spread. However, one major concern for adaptive antenna system is the nonlinearity effects of the RF/IF chain upon digital baseband beamforming network. The article investigates these effects on the performanc... View full abstract»

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  • Signal constellations based on hypercubes

    Publication Year: 1995, Page(s):83 - 87
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (204 KB)

    A multi-harmonic argand diagram is introduced which defines the spectral harmonic information associated with repeated n-bit sequences of impulses. The highly regular and symmetrical structure of these spectral portraits is shown to be defined by sets of hypercubes. This paper discusses how these structures can be used as templates for designing signal space constellations View full abstract»

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  • Exploiting geographic spread (GS) for wide-area asynchronous transfer mode (ATM) dynamic multipoint routing

    Publication Year: 1995, Page(s):262 - 267
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    This paper looks at how geographic spread (GS) can be used to aid with the routing of dynamic multipoint connections in wide-area packet switched networks like ATM networks. It presents the geographic spread dynamic multipoint (GSDM) routing algorithm proposed by Kadirire (see ACM SIGCOM Computer Communications Review October 1994) and investigates how the algorithm performs when the GS, the multi... View full abstract»

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  • BT's video on demand technology

    Publication Year: 1995, Page(s):318 - 322
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    1994 has seen much publicity for the “information superhighway”, or even the “global superhighway” or other combinations of similar highly technologically-sounding journalistic or political jargon. The reality is a far cry from the apparent claims, but none the less, it is an emerging area where large global players are starting to flex their muscles as the potential busine... View full abstract»

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  • Towards TMN-based service control-A Personal Communication Support System for distributed communication environments

    Publication Year: 1995, Page(s):282 - 286
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB)

    This paper presents a TMN-based Personal Communications Support System (PCSS) which is currently under development at the Technical University of Berlin and supports personal mobility, service personalization and service interoperability in distributed multimedia environments. The PCSS design is driven by the recent advances in the field of personal communications in both telecommunications and di... View full abstract»

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  • The enterprise network in 2000

    Publication Year: 1995, Page(s):55 - 59
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB)

    The aim of the paper is to outline the technology that will will affect an enterprise at the turn of the millenium. Some of the topics discussed include: LANs, network trends and interconnection, interactive services, mobility, subscribers, and teleworking View full abstract»

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  • Adopting MPEG video traffic to avoid network congestion

    Publication Year: 1995, Page(s):105 - 109
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    Packet loss is widely used as an indication of network congestion over networks which do not provide bandwidth reservation. We use packet loss in conjunction with FEC as a means of congestion control for MPEG video sources. The receiver implements FEC to recover from packet loss. However, the level of packet losses are recorded and transmitted back to the source which acts on this information to a... View full abstract»

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  • Signal segmentation for live speech network assessment

    Publication Year: 1995, Page(s):225 - 229
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (348 KB)

    A digital adaptive filter (DAF) configuration is presented that models speech in the short term and allows accurate characterisation of echo paths. With the development of telecommunications networks it is imperative that network operators have the facility to continually assess the quality of service they are providing their customers. This is particularly important in international circuits as t... View full abstract»

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  • Blind combiner for space diversity in cellular mobile systems

    Publication Year: 1995, Page(s):332 - 336
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (248 KB)

    This paper studies an implementation of space diversity reception. The diversity scheme analysed is the optimum combining. The combiner is optimum in the sense that it maximizes the signal-to-interference-plus-noise power ratio at the output of the antenna array. The novelty of this approach is that it uses a blind adaptive combiner. Therefore, no training sequences are used for updating the anten... View full abstract»

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  • Performance analysis of Osman Nuri Ucan (ONU)-receiver for trellis coded M-QAM schemes in partial response channels

    Publication Year: 1995, Page(s):88 - 91
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (144 KB)

    In this paper, for the first time, trellis coded M-QAM modulated signals are analysed in partial response channels.The named Osman Nuri Ucan (ONU)-receiver is composed of an k-parallel unit memory decoder, k/k+1 rated systematic encoder, cascaded with PRS channel model. The combined trellis structure of the ONU-receiver reduces the state number from 2k2ν2k+1 res... View full abstract»

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  • Preventive flow control for video services in an ATM network

    Publication Year: 1995, Page(s):268 - 272
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (272 KB)

    This paper addresses a preventive flow control method suitable for video services within an ATM network. In the proposed method, each user runs a model that describes the variation of the aggregate traffic of all the sources that are connected to the network. Once the user finds the aggregate traffic reaches a certain level of the channel capacity, he adjusts the video codec's quantization step si... View full abstract»

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  • Performance optimisation of multiple access protocols for multiservice VSAT satellite networks

    Publication Year: 1995, Page(s):9 - 13
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    We develop a multiaccess scheme that, when applied to a VSAT satellite network, could efficiently accommodate traffic consisting of short, interactive data messages, longer file transfers and voice calls. This will enable a large number of users to share the satellite channel. The difficulties associated with the introduction of speech are discussed and ways to deal with these are suggested, so th... View full abstract»

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  • A multi-media conferencing service to the TINA-C architecture

    Publication Year: 1995, Page(s):287 - 291
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    This paper introduces the TINA consortium (TINA-C) and, its aims and achievements. The objectives of the collaborative UK TINA Multi-Media Auxiliary Project (TIMMAP) are described. A description of the work of the TIMMAP project during its first year is given, and the experience of the project in using the emerging TINA-C architecture to design a multi-media conferencing service are detailed. The ... View full abstract»

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  • Competitive telecommunications-changes below the waterline

    Publication Year: 1995, Page(s):189 - 192
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (268 KB)

    In the turbulent world of the 1990s, no industry more clearly demonstrates rapid change than telecommunications. Communications are the life blood of global trade and it is no coincidence that liberalisation of this key industry in many parts of the world is happening at a time of increasingly competitive trade between nations. Today, competition is the main driver of business activity and in most... View full abstract»

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  • Radio access applications

    Publication Year: 1995, Page(s):60 - 64
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    The intention of the paper is to provide an review of the state of the art in radio access applications in the local loop. This is done by briefly outlining the principle technologies, defining the relevant applications, providing a brief comparative study of the economics, examining the major European operators and suppliers and describing some ongoing market activities View full abstract»

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  • Distributed restoration in telecommunications networks

    Publication Year: 1995, Page(s):25 - 29
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (288 KB)

    As the complexity of telecommunications networks increases centralised control becomes less attractive, tending to increase response times to network events, reduce overall resilience and encourage a top level approach to development of network management applications. This results in a massive build up of software complexity. We discuss how distributed network restoration using embedded algorithm... View full abstract»

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  • A fiber in the loop cable TV system for broadcast and interactive services

    Publication Year: 1995, Page(s):110 - 114
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    This paper describes a new optical CATV distribution system, which brings the fiber very near to the subscriber. In order to provide economic solutions for fiber to the building (FTTB) or fiber to the curb (FTTC) network topologies, the system uses cascaded optical amplifiers and passive optical splitters for the access network. It describes the system architecture and the major system elements of... View full abstract»

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