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Communications Magazine, IEEE

Issue 7 • Date July 2008

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Displaying Results 1 - 25 of 30
  • Front cover - IEEE Communications Magazine - Front cover

    Page(s): c1
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  • Table of contents

    Page(s): 1 - 2
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  • The President's Page

    Page(s): 4 - 10
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    Freely Available from IEEE
  • Society news

    Page(s): 12 - 22
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    Freely Available from IEEE
  • Conference Calender

    Page(s): 24
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  • The "Buzz" about WCET Certification

    Page(s): 25
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  • New products

    Page(s): 28 - 29
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  • IEEE Standards in Communications and Networking [Guest Editorial]

    Page(s): 30 - 31
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  • The IEEE Standards Association and Its Ecosystem

    Page(s): 32 - 39
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (87 KB) |  | HTML iconHTML  

    This article describes IEEE Standards Associations and the ecosystem that surrounds it including: 1) The core principles of the Standards Association; 2) The history of the Standards Association including the formation of the Industry Standards and Technology Organization (ISTO) and the Corporate Advisory Group (CAG); 3) How societies and other groups within the Institutes sponsor the development of standards; 4) The process by which IEEE standards projects are initiated, developed and approved; 5) The intellectual property rights (IPR) policy of the Standards Association and the policies and procedures of the various group involved in standards development. 6) The development of consensus and the process used to appeal decisions made during standards development; 7) The Standards Association's relationship with other standards developing organizations including ISO, IEC and ITU. View full abstract»

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  • Development of 10 Gb/s EPON in IEEE 802.3av

    Page(s): 40 - 47
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (292 KB) |  | HTML iconHTML  

    The interest in the evolution of current PON systems toward high-data-rate systems capable of providing a future-proof platform for delivery of truly subscriber-oriented and personalized triple-play services resulted in the recent kickoff of the 10 Gb/s Ethernet PON system standardization effort in the IEEE . Ethernet PON has become a network of choice for low-cost subscriber-oriented digital service delivery, taking over the market previously dominated by DSL and cable modems. In this article we examine the current development process of 10 Gb/s EPON systems in more detail, standardized in the framework of the IEEE 802.3av task force, looking at the technical challenges, drivers, and possible evolution scenarios of the emerging high-data-rate access systems.. View full abstract»

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  • IEEE 802.11n Development: History, Process, and Technology

    Page(s): 48 - 55
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (110 KB) |  | HTML iconHTML  

    This article provides insight into the IEEE 802.1 In standard amendment development process, beginning with a general overview of the IEEE 802.11 process. Development of requirements and usage models in the study group and task group is discussed. The lengthy proposal down selection process used by 802.11n is described and critiqued. We also discuss the expected time to develop a standard from a market perspective. An overview of the physical layer technology used to achieve the 600 Mb/s data rate is presented. We outline the medium access layer features employed to enhance usable throughput to over 400 Mb/s. The added robustness afforded by techniques in the standard and issues with backward compatibility with legacy IEEE 802.1 la/g devices are addressed. View full abstract»

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  • IEEE 802.20: Mobile Broadband Wireless Access for the Twenty-First Century

    Page(s): 56 - 63
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (106 KB) |  | HTML iconHTML  

    Access to networked data and information services has taken on an ever increasing importance to users for business, entertainment, and social networking applications. Users want high-speed, high-reliability, and high-quality access to these information services to be ubiquitous and available when they are fully mobile. Having these services available in a mobile environment also provides additional opportunities for service providers to enrich their offerings with location- based services. This article describes the IEEE 802.20 standard that was developed to meet the unique requirements for supporting high-speed data services while at the same time supporting full user mobility. It is a standard optimized to provide (IP-based) broadband wireless (Internet) access in a mobile environment, thereby affording network operators superior performance (e.g., higher data rates, lower latency) and lower costs as compared to networks built using standards that are not optimized for that purpose. The standard includes an OFDM wideband mode and a 625k-multicarrier mode. TDD duplexing is supported by both the 625k-MC mode and the OFDM wideband mode; FDD duplexing is supported by the OFDM wideband mode. Both modes are designed to support a full range of QoS attributes, making this technology suitable to support real-time streaming service that has low delay and jitter requirements, as well as near-real-time data services, where low error rate can be traded off for delay. These characteristics of the 802.20 standard make it suitable to meet user requirements for wireless mobile access well into the twenty-first century. View full abstract»

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  • Recent Developments in the Standardization of Power Line Communications within the IEEE

    Page(s): 64 - 71
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (191 KB) |  | HTML iconHTML  

    Broadband connectivity to and within the home has been available to consumers for some time through various technologies. Among those technologies, power line communications is an excellent candidate for providing broadband connectivity as it exploits an already existing infrastructure. This infrastructure is much more pervasive than any other wired alternative (both to and within the home), and it allows virtually every line-powered device to become the target of value- added services. Therefore, PLC may be considered as the technological enabler of a multitude of future applications that probably would not be available otherwise. The most fundamental barrier to the widespread adoption of broadband PLC is the current lack of an international technical standard issued by a credible and globally recognized standards-setting body. Hopefully, this barrier will be eliminated soon through the work of the IEEE P1901 Corporate Standards Working Group. This group, which was created in June 2005, is entering a crucial phase. This article stresses the importance of standardization in the PLC context, gives an overview of the current activities of the IEEE P1901 working group, and also describes some of the technical challenges that the future 1901 standard must address to ensure the success of PLC in the marketplace. View full abstract»

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  • IEEE Standards Supporting Cognitive Radio and Networks, Dynamic Spectrum Access, and Coexistence

    Page(s): 72 - 79
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (121 KB) |  | HTML iconHTML  

    Cognitive radio techniques are being applied to many different communications systems. They hold promise for increasing utilization of radio frequencies that are underutilized today, allowing for improved commercial data services, and allowing for new emergency and military communications services. For example, these techniques are being considered by the U.S. FCC for communications services in unlicensed VHF and UHF TV bands. Although traditionally these techniques are closely associated with software-defined radios, many standards such as WiFi (IEEE 802.11), Zigbee (IEEE 802.15.4), and WiMAX (IEEE 802.16) already include some degree of CR technology today. Further advances are occurring rapidly. IEEE 802.22 will be the first cognitive radio-based international standard with tangible frequency bands for its operation. Standardization is at the core of the current and future success of cognitive radio. Industry stakeholders are participating in international standards activities governing the use of cognitive radio techniques for dynamic spectrum access and coexistence, next-generation radio and spectrum management, and interoperability in infrastructure-less wireless networks. This article provides a review of standardization activities for cognitive radio technologies and comments on prospects and issues for future standardization. View full abstract»

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  • Industry Analyst Forum: Trends in Communications [Guest Editorial]

    Page(s): 80 - 81
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  • Carrier Capital Expenditures

    Page(s): 82 - 88
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (107 KB) |  | HTML iconHTML  

    Capital expenditures (capex) remain the most closely-watched metric for determining the direction and level of investment that telecommunications carriers are making in network equipment and services. In turn, carrier capital spending is driven by the combination of two primary factors: the number of customers served by that carrier, and the volume of services demanded by those customers. This article analyzes the size, scope, and outlook of capital expenditures among telecommunications carriers in the U.S., and assesses the significance of capital expenditures for the carriers' customers, equipment vendors, and investors. Written by John Celentano, a highly-regarded telecom marketing consultant, the paper's findings and conclusions are based on a study of more than 50 wireline and wireless carriers that will spend a combined US$65 billion in 2008. View full abstract»

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  • FTTx: Current Status and the Future

    Page(s): 90 - 95
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (102 KB) |  | HTML iconHTML  

    By the end of 2007, there were 29 million subscribers to services supplied by FTTx equipment, and by 2012, it is expected the number will grow to over 100 million subscribers. In this paper, we review the current status of FTTx and analyze what is taking place in different regions of the world. We view the future for FTTx in terms of growth and the types of FTTx products we might see. View full abstract»

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  • A Switch in Time: The Role of Switched Digital Video in Easing the Looming Bandwidth Crisis in Cable

    Page(s): 96 - 102
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    Switched digital video technology, once considered little more than a wild-eyed science experiment by North American cable operators, has become mainstream. Indeed, we enter the summer of 2008 projecting that cable multiple- system operators - faced with ever-tightening bandwidth constraints as they seek to add more HDTV programming, niche programming, and other digital offerings - will cover more than half of the United States and Canada with switched digital installations by the end of the year and 75 percent or more of their cable footprint by the close of 2009. This article provides an industry analyst's perspective on the surge of interest in SDV and the implications of that surge for the future of the cable industry. View full abstract»

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  • Packet Transport Trends: IP/MPLS Success Challenged as Deployment Footprint Expands

    Page(s): 103 - 107
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (79 KB) |  | HTML iconHTML  

    For most of the last decade, the prevailing industry assumption was that large public networks would migrate all services, transport, and switching to a single end-to-end IP/MPLS network - convergence. This assumption was validated by significant growth in IP/MPLS investment. Looking to the future, economic forces that affect suppliers, as much as operators, are challenging this assumption, and other scenarios now seem plausible. View full abstract»

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  • Advances in Mobile Multimedia Networking and QoS: Part II [Guest Editorial]

    Page(s): 108 - 109
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  • Superposition of Broadcast and Unicast in Wireless Cellular Systems

    Page(s): 110 - 117
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (119 KB) |  | HTML iconHTML  

    Practical application of superposition coding in multiplexing broadcast and unicast for OFDM-based mobile cellular systems is discussed. Superposition coding, whose gain is increased as the superposed signals have larger difference in signal-to interference-plus-noise ratio, is well matched for unicast and broadcast in a single-frequency network configuration. Combined with interference cancellation technique, broadcast signals from multiple base stations can be cancelled in a single step, minimizing the interference from broadcast to unicast. Issues related with scheduling and strategy for time, frequency and power resource sharing between broadcast and unicast are discussed. The application of superposed broadcast and unicast is then extended to MIMO systems. Simulation results in a practical mobile cellular environment are also provided, showing significant throughput gain of superposed broadcast and unicast. View full abstract»

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  • Performance Enhancement in Future Mobile Satellite Broadcasting Services

    Page(s): 118 - 124
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (151 KB) |  | HTML iconHTML  

    Multimedia broadcast and multicast services have started to outpace simple data unicast services. A hybrid satellite-terrestrial network can provide a cooperative system in such a way as to provide high-quality seamless MBMS effectively. In this article we discuss two promising techniques that can improve the performance of a mobile satellite broadcasting system with HSTN. The objective of the first technique is to obtain diversity gain from independent signal paths; this can be achieved by using the space-time coding technique jointly operated on both the satellite and terrestrial repeaters. The goal of the second scheme is to obtain power gain by using a layered channel coding scheme with which a user terminal adapts to the channel condition. We demonstrate various simulation results for both schemes on the prescribed network structure, and the results show substantial improvements in performance. View full abstract»

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  • A New Paradigm for Mobile Multimedia Broadcasting Based on Integrated Communication and Broadcast Networks

    Page(s): 126 - 132
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    This article provides a new paradigm to integrate the Chinese digital television/terrestrial multimedia broadcasting (DTMB) systems with existing mobile communication systems, which can support mobile multimedia broadcasting services with carrier-grade quality. By dividing the services into four categories -digital TV, video on demand, data on demand, and Internet access - a complete design of the layered structure and signaling protocols are presented. Specifically, a subnetwork data unit layer and a modified hybrid ARQ signaling protocol have been proposed. A testbed at Tsinghua University based on DTMB and WLAN/CDMAlx has been successfully implemented, and the experimental results clearly show the effectiveness of the proposed signaling protocols. View full abstract»

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  • Optical Communications: Enabling Global Broadband Communications Networks [Guest Editorial]

    Page(s): 134 - 135
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  • Practical Deployment of Passive Optical Networks

    Page(s): 136 - 145
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1370 KB) |  | HTML iconHTML  

    This article describes several real deployments of passive optical networks (PONs, the most common form of fiber to the home, FTTH) in several parts of the world, some with incumbent providers, some with other entities. The networks and service models are described, along with initial experiences with providing service. PON describes a technology whereby video, voice, and data can be delivered to residential and business customers using fiber optics from the point of origination to the home. The point of origination is called a central office, or CO, in the telephone industry, and a headend or hub in the cable TV industry. The headend is the master point where all signals are collected for the subscriber interface in both directions. The hub is a secondary location that interfaces with the headend, and then radiates connections out to subscribers. 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
Osman Gebizlioglu
Huawei Technologies