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Communications Magazine, IEEE

Issue 2 • Date Feb. 1996

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Displaying Results 1 - 16 of 16
  • Multiservice Loss Models for Broadband Telecommunication Networks [Book Review]

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    Freely Available from IEEE
  • Control and Performance in Packet, Circuit, and ATM Networks [Book Review]

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    Freely Available from IEEE
  • Scanning the literature

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  • Global Undersea Communication Networks [Guest Editorial]

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    Freely Available from IEEE
  • European Radio Propagation and Subsystems Research for the Evolution of Mobile Communications [Guest Editorial]

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    Freely Available from IEEE
  • Taking the challenge of multiple access for third-generation cellular mobile radio systems-a European view

    Page(s): 82 - 89
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    In Europe, the challenge of the design of third-generation cellular mobile radio systems has been taken numerous research and development activities in this field have been started. The authors try to give an overview of the European activities in this field. The article is organized in two parts. In the first part, the requirements for third-generation cellular mobile radio systems such as Universal Mobile Telecommunications System (UMTS) and Future Public Land Mobile Telecommunications System (FPLMTS), which has been named International Mobile Telecommunications after the year 2000 (IMT-2000) are presented concisely. Also, the importance and challenge of the multiple access design for such third-generation cellular mobile radio systems is explained. In the second part, numerous European research activities with focus on the multiple access design for third-generation cellular mobile radio systems are reviewed View full abstract»

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  • Radiowave propagation in mobile communications: an overview of European research

    Page(s): 70 - 81
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    Detailed knowledge of radio propagation effects is a keystone for the development and performance assessment of mobile communication systems. Although a lot of investigations have already been carried out, there remains a need to gain deeper insight into the complex mechanisms which govern radio propagation. The authors first present a summary of the propagation mechanisms and discuss some issues related to radio channel parameters and measurement techniques. Then a systematic description of the propagation and simulation models developed within various European projects is given. The survey focuses on the main features of these models and the rationale behind their elaboration View full abstract»

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  • A coordinated European effort for the definition of a satellite integrated environment for future mobile communications

    Page(s): 98 - 104
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    The complete integration of a satellite network with a terrestrial cellular network is a system architecture challenge that requires solving problems at both the transmission and network levels. However, the potential advantages of the integrated system suggest careful study of the appropriate solutions. The main technical advantages are: a limited increase in the complexity of the terminal for both the satellite and terrestrial systems, making it attractive for its potential low cost; the fixed earth stations (FESs) of the satellite system are similar to cellular base stations and switching centers, this avoids expensive development of FESs, which can be adapted from the terrestrial stations and may even be collocated with some of them, saving the common parts. The main operational benefits that could be achieved are the extension of the mobile services (bearer services, teleservices, supplementary services) offered by the terrestrial system to not yet covered areas, Eastern Europe and North Africa, aeronautical and maritime mobiles, so that one integrated land/aeronautical/maritime (LAM) system could be conceived for all mobiles. The European COST 227 Integrated Space/Terrestrial Mobile Networks project is discussed View full abstract»

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  • COST 231 achievements as a support to the development of UMTS: a look into the future

    Page(s): 90 - 96
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    An overview has been given of the current trends in the field of mobile communications, with specific reference to the European environment; in particular, the COST 231 organisation and activities during its first five years of life have been outlined, emphasizing the major results obtained so far and their potential impact on current or proposed third-generation mobile communication systems. Relationships established with other projects or regional and international standardization bodies have been pointed out, and special attention has been given to the activities envisaged for the near future View full abstract»

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  • European mobile communications on the move

    Page(s): 60 - 62, 67-9
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    A brief summary of the main activities performed under the RACE program in the field of mobile communications is presented, In particular, the technological studies and development have been outlined, showing that work has significantly progressed with major systems performance results already available from the various testbeds developed and coordinated by the projects. In parallel, possible evolution paths from second to third generation systems have been presented, together with regulatory trends, Beyond the technological work performed under the RACE program, it is hoped that the new ACTS program will further the progress in developing wireless technologies while paying progressively growing attention to the development of a strategic vision of mobile and personal communications beyond the year 2000. Finally, a brief presentation of the ACTS program has shown that the coming years should be devoted to services validation through active user involvement in field trials. The results are expected to he of great use to potential operators, providing them the possibility of testing user acceptance of broadband mobile services. Future mobile communications systems will need to provide users with broadband capabilities and advanced services, allowing for seamless provision across fixed and mobile networks View full abstract»

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  • The TAT-12/13 Cable Network

    Page(s): 24 - 28
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    The TAT-12/13 Cable Network will provide a 10 Gb/s capacity between the United States, the United Kingdom, and France. By using ring switching equipment, this capacity is fully restorable within the network without dropping calls in the process. The undersea repeaters in this network use optical amplifier technology to transport a single 5 Gb/s optical signal on each fiber pair. With the upgrade potential already demonstrated, TAT-12/13's transport capacity may at least double before the end of its 25-year design life View full abstract»

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  • The Asia Pacific Cable Network

    Page(s): 42 - 48
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    Describes the equipment and general operation of the Asia Pacific Cable Network (APCN). Because of its uniqueness to APCN additional detail regarding the powering system and its restoration have been supplied. Once operational in late 1996, APCN will interconnect countries in a region of the world that is experiencing rapid growth in demand for telecommunication services. With trans-Pacific and other interregional networks such as the TPC-5 Cable Network and the FLAG network going into service in 1996 and 1997, APCN will not only serve as a regional network, but as a feeder network to these networks, providing connectivity to other parts of the world. APCN will play an important role as another network in the ever growing global undersea communications network View full abstract»

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  • Switching technologies for future guided wave optical networks: potentials and limitations of photonics and electronics

    Page(s): 106 - 113
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    The continued rapid progress in the deployment of fiber optics communications has led to widespread interest in employing photonics to implement switching functions, hitherto reserved for electronics. Significant research effort has been devoted to this, and different specialized concepts have been suggested and partly demonstrated, albeit not in the field. At the same time, mainstream research and development in the area of telecommunications switching is solidly based on electronics. In this article we first give a short introduction to photonic switching. We then discuss generic switching functions in telecommunications networks with a view of the possible role of photonics, and discuss the implementation of the switching functions from a photonics and electronics point of view. We then apply this reasoning to look at scaling and transparency of all-optical networks based on our current research View full abstract»

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  • The TPC-5 Cable Network

    Page(s): 36 - 40
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    The TPC-5 Cable Network (TPC-5 CN) will be the first self-healing trans-Pacific ring network. It consists of a ring of undersea cables connecting six network nodes at six cable landing sites. The TPC-5 CN brings together a unique blend of technology to achieve the architectural robustness and transmission performance needed by network users. Among the technologies used in the TPC-5 CN are erbium doped fiber optical amplifiers (EDFAs), 5 Gb/s line terminating equipment (LTE), line monitoring equipment (LME), synchronous digital hierarchy (SDH) STM-16 add/drop multiplexers (ADMs) with four-fiber-ring automatic protection switching capability, and network management equipment (NME). The article describes the operation of each of these technology and how this equipment is collectively integrated to achieve the performance and functionality of the TPC-5 CN View full abstract»

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  • Africa ONE: the Africa Optical Network

    Page(s): 50 - 57
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    Describes the architecture of the Africa Optical Network (Africa ONE) that will encircle the entire continent of Africa with an undersea fiber optic ring network. Using a combination of wavelength-division multiplexing (WDM) and synchronous digital hierarchy (SDH) multiplex and cross-connect equipment, Africa ONE brings together a unique blend of technology to achieve network robustness. The article traces the need for this regional network and how it fits into the global undersea communications network. Also the authors describe the network elements that make up the transmission topology, the methodology used for interconnecting each African country to this network, protection and restoration of the network, and the network management system. Africa-ONE is a 40,000 km trunk and branch network that is planned to be ready for service in 1999. The present article presents the architecture of the undersea portion of the Africa-ONE project View full abstract»

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  • The FLAG cable system

    Page(s): 30 - 35
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    The Fiberoptic Link Around the Globe (FLAG) cable system is a 10 Gb/s synchronous digital hierarchy (SDH) based undersea fiber optic network. When fully operational, FLAG will connect 12 countries with over 120000 voice channels via 27000 km of mostly undersea cable. FLAG will incorporate a new generation of undersea fiber optic system that uses erbium-doped fiber amplifiers and will be jointly supplied by AT&T Submarine Systems Incorporated (SSI) and KDD-Submarine Cable Systems (SCS) Inc. When completed, FLAG will meet or exceed all relevant international performance standards, have greater reliability and availability than previous systems in the region, and conform to all ISO 9000 quality standards with respect to design, development, production, installation, and service View full abstract»

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Aims & Scope

IEEE Communications Magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications systems (PCS), ISDN, and more.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Sean Moore
Centripetal Networks