By Topic

Communications Magazine, IEEE

Issue 2 • Date Feb. 2000

Filter Results

Displaying Results 1 - 20 of 20
  • Fundamentals Of Telecommunications Network Management [Book Review]

    Publication Year: 2000 , Page(s): 40
    Save to Project icon | Request Permissions | PDF file iconPDF (117 KB)  
    Freely Available from IEEE
  • Object-oriented Computer Simulation Of Discrete-event Systems [Book reviews]

    Publication Year: 2000 , Page(s): 40 - 42
    Save to Project icon | Request Permissions | PDF file iconPDF (213 KB)  
    Freely Available from IEEE
  • Robert Aaron Receives The 1999 International Telecommunications "Cristoforo Colombo' Award

    Publication Year: 2000 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | PDF file iconPDF (432 KB)  
    Freely Available from IEEE
  • Optical Networks Come Of Age [Guest Editorial]

    Publication Year: 2000 , Page(s): 56
    Save to Project icon | Request Permissions | PDF file iconPDF (139 KB)  
    Freely Available from IEEE
  • A differentiated optical services model for WDM networks

    Publication Year: 2000 , Page(s): 68 - 73
    Cited by:  Papers (41)  |  Patents (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (52 KB)  

    This article addresses the issues of scalable end-to-end QoS in metropolitan DWDM networks serving as transit networks for IP access networks. DWDM offering a few wavelengths has been deployed in the past in backbone networks to upgrade point-to-point transmission where sharing is based on coarse granularity. This type of DWDM backbone network, offering a few light-paths, provides no support for QoS services traversing the network. As DWDM networks with larger numbers of wavelengths penetrate the data-centric metro environment, specific IP service requirements such as priority restoration, scalability, dynamic provisioning of capacity and routes, and support for coarse-grain QoS capabilities will have to be addressed in the optical domain in order to achieve end-to-end QoS over a DWDM network. We propose a QoS service model in the optical domain called differentiated optical services (DoS) based on a set of optical parameters that captures the quality and reliability of the optical lightpath. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Croatian way to the next millennium telecommunications [Guest Editorial]

    Publication Year: 2000 , Page(s): 96 - 97
    Save to Project icon | Request Permissions | PDF file iconPDF (233 KB)  
    Freely Available from IEEE
  • Technologies and architectures for scalable dynamic dense WDM networks

    Publication Year: 2000 , Page(s): 58 - 66
    Cited by:  Papers (41)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (84 KB)  

    Wavelength-division multiplexing has been recognized for a number of years as a promising and applied technology that can be used to increase the aggregate system bit rate. More attention has been given to devices and technologies that can be exploited to enable WDM to move from being a pure transmission technology into a state where it can be applied in transparent all-optical networks. In particular, devices and technologies such as wavelength routing switches, switched sources, tunable sources, tunable filters, and wavelength converters have all been developed and demonstrated. This article gives a description of the technologies, subsystems, and network architectures that rely on multiple wavelengths to achieve full transparent all-optical connectivity joined, in many instances, with features like scalability, modularity, and survivability. Exposure is also given to most of the current WDM demonstrators View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The IP syndrome

    Publication Year: 2000 , Page(s): 18 - 28
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (416 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multimedia dictionary network application: design and implementation

    Publication Year: 2000 , Page(s): 130 - 137
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (184 KB)  

    Proficiency in foreign languages is essential for professionals from countries in transition. A multimedia dictionary Internet application may offer needed help in everyday activities as well as in distance-learning systems. A multimedia dictionary is considered as both a conventional dictionary tool and a distance-learning network application. We analyze the architecture and implementation issues arising in the design and implementation of a multimedia dictionary network application. The application is considered multimedia since it is designed to support textual, visual, and audio information content. Practical implementation is shown to be feasible with current technology, but a lack of available multimedia standards has been recognized. This is why we have considered the existing standards as well as the standards in development. The application is developed in Java language, and may be run as either a standalone application or an applet. The latter entails accessibility in a ubiquitous manner to a large number of users. The application is intended for both non-native English users and professionals exposed to specific technical terminology View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The EMA system: a CTI based e-mail alerting service

    Publication Year: 2000 , Page(s): 122 - 128
    Cited by:  Papers (2)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (108 KB)  

    The integration of Internet services and telephony services is a new area for the development of telecommunications services. One example is an e-mail alerting service that uses the telephony network for e-mail notification. The EMA system is a computer telephony integration (CTI) application that checks a user's mailbox on the mail server and informs him/her over the phone when new e-mail arrives, eliminating the need for permanent Internet connection. The EMA system has a Web-based interface, enabling the user to configure service parameters. The EMA system is developed as a distributed and concurrent application. It consists of seven modules: the console, Web interface, Web handler, controller, voice machine, database, and mail checker, using communication solutions based on component object model (COM) technology. This article describes the structure of the EMA system, its implementation, and advantages for users View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fixed-mobile convergence strategy: technologies and market opportunities

    Publication Year: 2000 , Page(s): 116 - 121
    Cited by:  Papers (14)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (60 KB)  

    Competition in the telecommunications market is growing rapidly. Therefore, network operators and service providers have to reform their marketing and service delivery strategies in order to be competitive in the broadband service market. A convergence strategy for fixed and mobile services via a standards-based IN platform may provide a step in the right direction. This article deals with evolutionary steps for convergence services and their benefits to network operators and customers. It presents possible migration paths from the existing GSM to UMTS. The article also provides a comparative analysis of the wireless technologies involved in this evolution View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Advances in photonic packet switching: an overview

    Publication Year: 2000 , Page(s): 84 - 94
    Cited by:  Papers (216)  |  Patents (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (228 KB)  

    The current fast-growing Internet traffic is demanding more and more network capacity every day. The concept of wavelength-division multiplexing has provided us an opportunity to multiply network capacity. Current optical switching technologies allow us to rapidly deliver the enormous bandwidth of WDM networks. Photonic packet switching offers high-speed, data rate/format transparency, and configurability, which are some of the important characteristics needed in future networks supporting different forms of data. In this article we present some of the critical issues involved in designing and implementing all-optical packet-switched networks View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The superPON demonstrator: an exploration of possible evolution paths for optical access networks

    Publication Year: 2000 , Page(s): 74 - 82
    Cited by:  Papers (55)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (132 KB)  

    An optical broadband access network called APON (ATM-based Passive Optical Network) has been standardized and its commercial deployment started. This article discusses possible evolution scenarios for the APON system with respect to bit rate, range, and splitting factor, leading to the SuperPON concept. Technical challenges encountered during the realization of the SuperPON demonstrator within the European ACTS project PLANET are discussed in detail. In addition, to illustrate when these technologies will become commercially viable, the major results of an economic-feasibility study are presented. Finally, the SuperPON integration in the pan-European trial of the ACTS PELICAN project is described View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The complementary roles of RSVP and differentiated services in the full-service QoS network

    Publication Year: 2000 , Page(s): 154 - 162
    Cited by:  Papers (31)  |  Patents (21)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (76 KB)  

    With the growth of the Internet and intranets, QoS technology that has been developed over a span of several years is quickly becoming more relevant. This article first defines QoS and introduces a taxonomy for QoS mechanisms. The evolution of several major QoS mechanisms is described with a special focus on RSVP and differentiated services. Special attention is paid to the role of the IETF in developing QoS mechanisms. We describe a QoS network that combines RSVP and differentiated services in a manner that realizes the benefits of each. We show that, in general, the adoption of increasingly sophisticated QoS mechanisms can enhance the ability of a network to offer high-quality service guarantees while simultaneously making efficient use of raw network resources. These mechanisms carry a cost in the form of increased overhead, which must be weighed against the benefits of the mechanism View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New generation network architecture and software design

    Publication Year: 2000 , Page(s): 108 - 114
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (64 KB)  

    This article deals with new telecommunications networks, the reasons for changes, and the options telecommunications are facing today. The new generation of network architecture is discussed, and two network evolution case studies are presented as well as the new role of powerful applications in the future development of networks. Special emphasis is on software research and development supporting this “new telecom world” View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Approaches to improving performance of STREAMS-based protocol stacks

    Publication Year: 2000 , Page(s): 164 - 171
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (56 KB)  

    STREAMS kernel mechanisms are being used to implement networking protocols in a number of operating systems, like UNIX, Windows, and pSOS. STREAMS provides a number of desirable features for modular protocol stack implementation by defining a high degree of standardization for implementing protocol layer modules and for message transfer between the modules. But this strict layered and modular approach prevents flexibility in implementing techniques that can result in high performance. The original STREAMS-based stacks have shown very poor protocol performance. A number of improved techniques for implementing STREAMS-based protocol stacks have been suggested in the literature in the past few years. These techniques have resulted in high-performance STREAMS-based stacks that match the performance of BSD UNIX-based stacks. This article makes a study of these new approaches and discusses the performance gains achieved by them. These approaches can be used for implementing high-performance protocol stacks in the STREAMS kernel, over both uniprocessor and multiprocessor systems View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Real-time implementation of a reconfigurable IMT-2000 base station channel modem

    Publication Year: 2000 , Page(s): 148 - 152
    Cited by:  Papers (5)  |  Patents (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (48 KB)  

    Research suggests that joint methods combining smart antennas, RAKE reception, multi-user detection or other adaptive methods may be practically implemented for IMT-2000 channel modems using computationally simplified algorithms. Using software-defined radio methods, these modems can be employed in a new generation of adaptive multimode base stations which permit software reconfiguration from second- to third-generation air interfaces. Practical implementation is made possible by corresponding advances in hardware technology, including new processors and high-bandwidth I/O fabrics which replace traditional computer buses with their inherent limitations in bandwidth and scalability. In this article adaptive processing research is reviewed, implementation requirements for second- and third-generation base stations are considered, and the capabilities of selected new monolithic silicon devices are examined. A possible implementation approach for a reconfigurable multimode base station channel modem using software defined radio (SDR) design methods is proposed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Software and DSP in radio

    Publication Year: 2000 , Page(s): 138
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (120 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A soft radio architecture for reconfigurable platforms

    Publication Year: 2000 , Page(s): 140 - 147
    Cited by:  Papers (19)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (132 KB)  

    While many soft/software radio architectures have been suggested and implemented, there remains a lack of a formal design methodology that can be used to design and implement these radios. This article presents a unified architecture for the design of soft radios on a reconfigurable platform called the layered radio architecture. The layered architecture makes it possible to incorporate all of the features of a software radio while minimizing complexity issues. The layered architecture also enables a methodology for incorporating changes and updates into the system. An example implementation of the layered architecture on actual hardware is presented View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Croatian telecommunications way toward the communications era

    Publication Year: 2000 , Page(s): 98 - 106
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (208 KB)  

    Previous years have brought interesting developments in the field of telecommunications all over the world. Countries in transition have experienced it in their own way. Croatia is an interesting example of such a country. After gaining independence in 1991 and setting course toward the open market economy, the development of telecommunications was particularly fast. Related legislative changes as well as changes in the ownership structure of Croatian telecom will surely have a significant impact on the future development of telecommunications in Croatia, which will be based on our own experiences as well as the experiences of other countries in transition and developed countries. The planning methodology will include the techno-economic evaluation of minimum-risk introductory routes for new services as defined within the European Union projects. An overview of the development of Croatian telecommunications during the '90s as well as plans for future development are presented. A comparison with other countries in development as well as with developed countries is given, too. A survey of the development of telecommunications within the County of Split and Dalmatia, including economic aspects, is given. An overview of research and development activities is also given View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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
Osman Gebizlioglu
Huawei Technologies