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Communications Magazine, IEEE

Issue 2 • Date February 2010

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Displaying Results 1 - 25 of 32
  • IEEE Communications Magazine - Front cover

    Page(s): c1
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  • Table of contents

    Page(s): 2 - 4
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    Freely Available from IEEE
  • Conferences: Building on a tradition of excellence [The President's Page]

    Page(s): 6 - 7
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    Freely Available from IEEE
  • Communications Society Prize Paper Awards [Society News]

    Page(s): 8
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    Freely Available from IEEE
  • OFC/NFOEC 2010: Keeping up with global communication demand [OFC Conference Preview]

    Page(s): 10,12 - 14
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    Freely Available from IEEE
  • Book reviews (2 books reviewed)

    Page(s): 16 - 17
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  • Sharing feedback [Certification Corner]

    Page(s): 18
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  • IEEE GLOBECOM 2009: A conference recognizing communications in the human context

    Page(s): 20,22 - 24
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  • Conference calendar

    Page(s): 26
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  • New products

    Page(s): 27
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  • Two controversies in the early history of the telegraph

    Page(s): 28 - 32
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (374 KB) |  | HTML iconHTML  

    Two related questions emerge from these controversies over the invention and early commercialization of the telegraph. First, how could Morse, a man with little scientific training or mechanical skill, invent the telegraph? Second, how should we apportion credit for the telegraph among Morse, Henry, and Vail?The author's conclusion is clear: Morse was the one who succeeded in reducing the invention of telegraphy in the United States to practice, but he relied on the substantialcontributions to the then-new science of electricity by Henry and the mechanical ingenuity of Vail. Without the help of either one, the Morse telegraph would not have been successful as a commercial system. As another interesting note, the author points out that the Morse code was developed by Morse himself, despite frequent comments that Vail was the one who developed the code. View full abstract»

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  • Global Communications Newsletter

    Page(s): 1 - 4
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  • Optical communications [Series Editorial]

    Page(s): 38
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  • Perspective in next-generation home networks: Toward optical solutions?

    Page(s): 39 - 47
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (712 KB) |  | HTML iconHTML  

    The meaning of broadband connection is in continuous evolution. FTTH and ever-improving ADSL technologies are capable of offering to the final residential user a very-high-performance access network connection to the main door of our homes. At the same time, high-definition and interactive video will require higher and higher bit rates inside the home. Both drivers lead to the requirement for high-quality networking also inside homes, to avoid a somehow ironic, but indeed possible situation in which the home area network becomes the actual bottleneck of the full system. In this article we review the requirements for next-generation HANs and show that this environment may end up taking advantage of optical cabling solutions as an alternative to more traditional copper or pure wireless approaches. View full abstract»

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  • Online gaming and P2P file sharing in next-generation EPONs

    Page(s): 48 - 55
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (262 KB) |  | HTML iconHTML  

    Understanding the social impact of advanced access technologies and witnessing that applications are increasingly based on content provided by end users, we take a look at next-generation EPON networks and elaborate on their suitability to efficiently support online gaming and P2P file sharing applications by means of evolutionary WDM and long-reach PON upgrades. We examine a scalable all-optical integration of WDM EPONs, which exploits the unique traffic characteristics of P2P file sharing and online gaming applications, and supports them with an incremental add-on service with fallback option. View full abstract»

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  • Cost vs. reliability performance study of fiber access network architectures

    Page(s): 56 - 65
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (279 KB) |  | HTML iconHTML  

    Fiber to the home is the future-proof technology for broadband access networks. Several fiber access network architectures have been developed (e.g., point-to-point, active optical network, and passive optical network). PON is considered the most promising solution due to the relatively low deployment cost and high resource efficiency. Meanwhile, because of the growing demand for reliable service delivery, fault management is becoming more significant in all parts of communications networks. However, there is a trade-off between the cost of protection and the level of service reliability. Since economical aspects are most critical in the access part of networks, improving reliability performance by duplication of network resources (and capital expenditures) could be too expensive. Therefore, recent work has focused on PON protection schemes with reduced CAPEX. The future trend will probably migrate toward minimizing operational expenditures during the access network lifetime. The main contributions of this article include providing a general method for CAPEX and OPEX analysis that can be applied to any type of fiber access network with consideration of changed component cost in time and variable take rates, and comparing the total cost (i.e., sum of CAPEX and OPEX) for the selected representative architectures with and without protection for business and residential users in relation to reliability performance. The aim is to give a guideline for the design of the most cost-effective protection schemes, while maintaining acceptable service reliability. View full abstract»

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  • Moore's Law and energy and operations savings in the evolution of optical transport platforms

    Page(s): 66 - 69
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (203 KB) |  | HTML iconHTML  

    As a telecommunications equipment vendor, we have witnessed a tremendous increase in the capacity of transport equipment over the past 16 years. Platforms have evolved from the first generation add/drop multiplexer to the next generation multiservice provisioning platform and today's packet optical transport platform. This article discusses our findings in the application of Moore's Law to these optical transport platforms in capacity, power, space, and capital cost. It also discusses our findings in using Moore's Law as a presumption to explore the operations cost savings in power consumption, office floor space, and maintenance. Payback periods for the capital cost of new technology from energy and operations savings are investigated. The conclusions justify the replacement of the network technology for every other generation. View full abstract»

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  • Reliable video broadcasts via protected Steiner trees

    Page(s): 70 - 76
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (319 KB) |  | HTML iconHTML  

    The introduction of the latest generation of ROADMs in the communication long-haul transport networks allows network planners to consider some new cost-effective design alternatives. Specifically, for video broadcast services ROADM wavelength drop-and-continue technology enables simple wavelength connections at each node via a tree-like topology, and the intelligent control plane permits the use of various shared protection schemes (with failure restoration switching times comparable to SONET BLSR). In this article we formulate models for reliable TV/video broadcast. We consider the network topologies based on minimum spanning trees. The objective is to minimize the total network cost while ensuring that the broadcast, originating in one (or two) source node(s), is delivered to a set of destination nodes and the network will tolerate at least one single link failure. The resulting protected tree networks are illustrated, and the cost of protection strategies is analyzed. View full abstract»

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  • LTE update [Series Editorial]

    Page(s): 78
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  • Cooperative MIMO channel models: A survey

    Page(s): 80 - 87
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (408 KB) |  | HTML iconHTML  

    Cooperative multiple-input multiple-output technology allows a wireless network to coordinate among distributed antennas and achieve considerable performance gains similar to those provided by conventional MIMO systems. It promises significant improvements in spectral efficiency and network coverage and is a major candidate technology in various standard proposals for the fourth-generation wireless communication systems. For the design and accurate performance assessment of cooperative MIMO systems, realistic cooperative MIMO channel models are indispensable. This article provides an overview of the state of the art in cooperative MIMO channel modeling. We show that although the existing standardized point-to-point MIMO channel models can be applied to a certain extent to model cooperative MIMO channels, many new challenges remain in cooperative MIMO channel modeling, such as how to model mobile-to-mobile channels, and how to characterize the heterogeneity and correlation of multiple links at the system level appropriately. View full abstract»

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  • Carrier aggregation for LTE-advanced mobile communication systems

    Page(s): 88 - 93
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (225 KB) |  | HTML iconHTML  

    In order to achieve up to 1 Gb/s peak data rate in future IMT-Advanced mobile systems, carrier aggregation technology is introduced by the 3GPP to support very-high-data-rate transmissions over wide frequency bandwidths (e.g., up to 100 MHz) in its new LTE-Advanced standards. This article first gives a brief review of continuous and non-continuous CA techniques, followed by two data aggregation schemes in physical and medium access control layers. Some technical challenges for implementing CA technique in LTE-Advanced systems, with the requirements of backward compatibility to LTE systems, are highlighted and discussed. Possible technical solutions for the asymmetric CA problem, control signaling design, handover control, and guard band setting are reviewed. Simulation results show Doppler frequency shift has only limited impact on data transmission performance over wide frequency bands in a high-speed mobile environment when the component carriers are time synchronized. The frequency aliasing will generate much more interference between adjacent component carriers and therefore greatly degrades the bit error rate performance of downlink data transmissions. View full abstract»

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  • Self-configuration and self-optimization for LTE networks

    Page(s): 94 - 100
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (193 KB) |  | HTML iconHTML  

    With the rapid growth of mobile communications, deployment and maintenance of cellular mobile networks are becoming more and more complex, time consuming, and expensive. In order to meet the requirements of network operators and service providers, the telecommunication industry and international standardization bodies have recently paid intensive attention to the research and development of self-organizing networks. In this article we first introduce both the market and technological perspectives for SONs. Then we focus on the self-configuration procedure and illustrate a self-booting mechanism for a newly added evolved NodeB without a dedicated backhaul interface. Finally, mobility load balancing as one of the most important selfoptimization issues for Long Term Evolution networks is discussed, and a distributed MLB algorithm with low handover cost is proposed and evaluated. View full abstract»

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  • Quality-driven cross-layer optimized video delivery over LTE

    Page(s): 102 - 109
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (325 KB) |  | HTML iconHTML  

    3GPP long term evolution is one of the major steps in mobile communication to enhance the user experience for next-generation mobile broadband networks. In LTE, orthogonal frequency-division multiple access is adopted in the downlink of its E-UTRA air interface. Although cross-layer techniques have been widely adopted in literature for dynamic resource allocation to maximize data rate in OFDMA wireless networks, application-oriented quality of service for video delivery, such as delay constraint and video distortion, have been largely ignored. However, for wireless video delivery in LTE, especially delay-bounded real-time video streaming, higher data rate could lead to higher packet loss rate, thus degrading the user-perceived video quality. In this article we present a new QoS-aware LTE OFDMA scheduling algorithm for wireless real-time video delivery over the downlink of LTE cellular networks to achieve the best user-perceived video quality under the given application delay constraint. In the proposed approach, system throughput, application QoS constraints, and scheduling fairness are jointly integrated into a cross-layer design framework to dynamically perform radio resource allocation for multiple users, and to effectively choose the optimal system parameters such as modulation and coding scheme and video encoding parameters to adapt to the varying channel quality of each resource block. Experimental results have shown significant performance enhancement of the proposed system. View full abstract»

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  • The Second ITU-T Kaleidoscope Conference: "Innovations for Digital Inclusion" [Series Editorial]

    Page(s): 110 - 111
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  • Is digital inclusion a good thing? How can we make sure it is?

    Page(s): 112 - 118
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (111 KB) |  | HTML iconHTML  

    Activities directed at "including" more people in the use of digital technology are predicated on the assumption that such inclusion is invariably a good thing. It appears so, when judged solely by immediate practical convenience. However, if we also judge in terms of human rights, whether digital inclusion is good or bad depends on what kind of digital world we are to be included in. If we wish to work toward digital inclusion as a goal, it behooves us to make sure it is the good kind. 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