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IEEE Communications Magazine

Issue 9 • Sept. 1993

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Displaying Results 1 - 8 of 8
  • SONET implementation

    Publication Year: 1993, Page(s):34 - 40
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The status of the synchronous optical network (SONET) infrastructure development and deployment are examined to see whether or not they meet original expectations. Issues arising from deployment, such as the use of new features and the necessary support from operations systems, and future directions of SONET are discussed. These future trends include digital cross connect systems (DCSs), SONET rin... View full abstract»

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  • Network synchronization-a challenge for SDH/SONET?

    Publication Year: 1993, Page(s):42 - 50
    Cited by:  Papers (20)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1226 KB)

    The basic characteristics and requirements of existing networks are summarized, focusing on network synchronization aspects and related parameters. The SDH/SONET-specific pointer-based multiplexing technique is described. It is shown that the need to synchronize the SDH/SONET network elements is not an inherent characteristic of these synchronous networks but rather a result of the generally appli... View full abstract»

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  • Implementing a flexible synchronous network

    Publication Year: 1993, Page(s):52 - 55
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (422 KB)

    The SYNET project, undertaken by Deutsche Telekom to modernize its transmission network, is discussed. The SYNET technology is based on the synchronous digital hierarchy (SDH), which uses synchronous transport modules of 155 Mbit/s (STM-1). The latter include a maximum usable bit rate of about 50 Mbit/s as well as a variety of additional information intended for network management. Since the trans... View full abstract»

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  • The impact of G.826 (digital systems error performance)

    Publication Year: 1993, Page(s):56 - 62
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    The International Consultative Committee for Telephone and Telegraph (CCITT) recommendation G.826, the error performance recommendation for digital systems operating at or above the primary rate, is summarized. The relationship between block-based error performance parameters and the bit error rate (BER) is reviewed. The transition from the previous recommendation, G.821, to G.826 is discussed, in... View full abstract»

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  • Cost-effective network evolution

    Publication Year: 1993, Page(s):64 - 73
    Cited by:  Papers (3)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1297 KB)

    The synchronous optical network (SONET) asynchronous transfer mode (ATM) ring architecture called SONET/ATM ring using point-to-point virtual paths (SARPVPs) is discussed. A cost-effective three-phase network evolution path for supporting both the switched and nonswitched DS1 and DS3 services and a possible operations system (OS) evolution path under the proposed three-phase network evolution scen... View full abstract»

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  • The European (r)evolution of wireless digital networks

    Publication Year: 1993, Page(s):74 - 82
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1112 KB)

    Some of the European developments of two different personal communication services, digital cellular telephony and mobile data networks, are compared with each other and with developments in the United States. The related agendas for research and development of wireless technologies in the past decade are also reviewed and compared. The present status of European cellular telephony, the implementa... View full abstract»

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  • High quality networking of audio-visual information

    Publication Year: 1993, Page(s):84 - 95
    Cited by:  Papers (17)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1911 KB)

    An overview of low bit rate coding and the interaction between source coding and channel coding is presented. The interaction of coding with networking in a multiuser environment, including algorithms for robust coding which anticipate imperfect network performance, and techniques of decoding a signal that has traversed an imperfect network are described. The performances of such algorithms are il... View full abstract»

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  • FDDI: current issues and future plans

    Publication Year: 1993, Page(s):98 - 105
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1411 KB)

    Fiber Distributed Data Interface (FDDI), a set of standards developed by the American National Standards Institute (ANSI) X3T9.5 Task Group, is reviewed. The timed token access method, used to share the medium among stations in this 100-Mbit/s local area network (LAN), differs from the traditional token access method in that the time for the token to walk around the ring is accurately measured by ... View full abstract»

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IEEE Communications Magazine, considered by most to be their most important member benefit, provides timely information on all aspects of communications: monthly feature articles describe technology, systems, services, market trends, development methods, regulatory and policy issues, and significant global events.

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Osman Gebizlioglu
Huawei Technologies