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Main page » Periodicals » IEEE Communications Magazine - March 2009

IEEE Communications Magazine - March 2009


IEEE Communications Magazine (Vol.47 | No.3 | March 2009)

Optical Communications Becomes an Industry Stalwart
Hideo Kuwahara and Jim Theodoras
Photonic Integration for High-Volume, Low-Cost Applications
To date, photonic integration has seen only limited use in a few optical interface applications. The recently adopted IEEE draft standards for 40 Gb/s and 100 Gb/s Ethernet single-mode fiber local area network applications will change this situation.
Chris Cole and Bernd Huebner, Finisar Corp.; John E. Johnson, CyOptics, Inc.

A Total-Cost-of-Ownership Analysis of L2-Enabled WDM-PONs
Next-generation access networks must provide bandwidths in the range of 50–100 Mb/s per residential customer. Today, most broadband services are provided through copper-based VDSL or fiber-based GPON/EPON solutions. Candidates for next-generation broadband access networks include several variants of WDM-PONs.
Klaus Grobe and Jrg-Peter Elbers, ADVA AG Optical Networking

The Road to Carrier-Grade Ethernet
Carrier-grade Ethernet is the latest step in the three-decade development of Ethernet. The authors describe the evolution of Ethernet technology from LAN toward a carrier-grade operation and then, with an overview of recent enhancements.
Kerim Fouli and Martin Maier, Optical Zeitgeist Laboratory, INRS

A Comparison of Dynamic Bandwidth Allocation for EPON, GPON, and Next-Generation TDM PON
Dynamic bandwidth allocation (DBA) in passive optical networks (PON) presents a key issue for providing efficient and fair utilization of the PON upstream bandwidth while supporting the quality of service (QoS) requirements for different traffic classes.
Bjrn Skubic, Ericsson Research; Jiajia Chen, Zhejiang University and Royal Institute of Technology ( KTH/ICT); Jawwad Ahmed and Lena Wosinska, Royal Institute of Technology (KTH/ICT); Biswanath Mukherjee, University of California, Davis
Radio Communications: Components, Systems, and Networks
Joseph B. Evans and Zoran Zvonar
Guest Editorial: Dynamic Spectrum Access
Douglas C. Sicker

Cognitive Radio as a Mechanism to Manage Front-End Linearity and Dynamic Range
Most of the consideration of the benefits and applicability of Dynamic Spectrum Access (DSA) has been focused on opportunities associated with spectrum availability. This article describes the use of DSA to resolve challenges in achieving wireless and cognitive radio operation in dense or energetic spectrum.
Preston F. Marshall, Defense Advanced Research Projects Agency

Primary User Behavior in Cellular Networks and Implications for Dynamic Spectrum Access
DSA approaches are increasingly being seen as a way to alleviate spectrum scarcity. However, before DSA approaches can be enabled, it is important that we understand the dynamics of spectrum usage in licensed bands.
Daniel Willkomm, Technische Universitt Berlin; Sridhar Machiraju and Jean Bolot, Sprint Applied Research; Adam Wolisz, Technische Universitt Berlin and University of California, Berkeley

A Technical Framework for Light-Handed Regulation of Cognitive Radios
Light-handed regulation is discussed often in policy circles, but what it should mean technically has always been a bit vague. For cognitive radios to succeed in reducing the regulatory overhead, this has to change.
Anant Sahai and Kristen Ann Woyach, University of California, Berkeley; George Atia and Venkatesh Saligrama, Boston University

Public Safety Radios Must Pool Spectrum
A critical first step toward a DSA-enabled future is to reform spectrum management to create spectrum pools that DSA-enabled devices, such as cognitive radios, can use, under the control of more dynamically flexible and adaptive prioritization policies than is possible with legacy technology.
William Lehr, Massachusetts Institute of Technology; Nancy Jesuale, NetCity

Licensed or Unlicensed: The Economic Considerations in Incremental Spectrum Allocations
Standard economic theory tells us that the value of an additional unit of spectrum is equal to the increase in socially beneficial services it produces. For licensed spectrum allowed to trade in markets, this value is relatively easy to calculate: It is the price firms pay for the licensed spectrum. The equation is more complex, however, when unlicensed spectrum is involved.
Coleman Bazelon, The Brattle Group
Modeling and Simulation: A Practical Guide for Network Designers and Developers
Jack Burbank

Wireless Network Modeling and Simulation Tools for Designers and Developers
The authors provide a discussion of M&S for wireless network designers and developers, with particular attention paid to the architectural issues.
William T. Kasch, Jon R. Ward, and Julia Andrusenko, The Johns Hopkins University Applied Physics Laboratory

Simulation Tools for Multilayer Fault Restoration
The authors describe the modeling methods and the simulation tools they have used for the analysis of a new integrated restoration scheme operating at multiple layers /networks.
George Tsirakakis, King’s College London; Trevor Clarkson, Department for Business

Design Validation of Service Delivery Platform Using Modeling and Simulation
The authors discusse how modeling and simulation effectively help validate the design of various components constituting the service delivery platform.
Tony Ingham, BT; Sandeep Rajhans, Dhiraj Kumar Sinha, Kalyani Sastry, and Shankar Kumar, Tech Mahindra Ltd.

Unified Simulation Evaluation for Mobile Broadband Technologies
The authors present a unified simulation methodology, including fading channel models, system configurations, and how to consider technology-dependent algorithms, such as scheduling, overhead modeling, interference margin definition, and resource allocation based on system loading.
Yuehong Gao, Xin Zhang, and Dacheng Yang, Beijing University of Posts and Telecommunications; Yuming Jiang, Norwegian University of Science and Technology

Modular System-Level Simulator Concept for OFDMA Systems
The authors describe how the cellular setup and traffic generation are performed for the proposed snapshot concept. Furthermore, a new methodology is proposed for a quality measure of resource units that is applicable to future wireless systems using an interleaved subcarrier allocation.
Andreas Ferneke and Anja Klein, Technische Universitt Darmstadt; Bernhard Wegmann and Karl Dietrich, Nokia Siemens Networks GmbH & Co. KG

High-Fidelity and Time-Driven Simulation of Large Wireless Networks with Parallel Processing
The authors describe a parallel processing technique for time-driven simulations of large and complex wireless networks. The technique explicitly considers the physical-layer details of wireless network simulators such as shadowing and co-channel interference.
Hyunok Lee, Vahideh Manshadi, and Donald C. Cox, Stanford University

Agent-Based Tools for Modeling and Simulation of Self-Organization in Peer-to-Peer, Ad Hoc, and Other Complex Networks
The authors address this important area of research for the M&S community in the domain of computer networks by demonstrating the use of agent-based modeling tools for modeling self-organizing mobile nodes and peer to peer (P2P) networks.
Muaz Niazi and Amir Hussain, University of Stirling

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