|The tutorial is primarily addressing the emerging broadband wireless solutions as specified by the IEEE 802.16 standards, often referred to as WiMAX (Worldwide Interoperability for Microwave Access) technology. WiMAX is an Orthogonal Frequency Division Multiplexing (OFDM) based system which offers promising high spectral efficiency, scalable carrier bandwidth options (e.g. from 1.25MHz to 20MHz), flexible spectrum options (e.g. 2-6GHz), multiple duplexing options (Time Division Duplexing & Frequency Division Duplexing), various subchannelization options and users mobility thanks to its 802,16e variant. Technologies such as Hybrid Automatic Repeat Request (H-ARQ), Space Time Coding (STC), Advanced Antenna Systems (AAS), Multiple Input Multiple Output (MIMO) and Space Division Multiple Access (SDMA) have been enhanced to support mobile environments and to improve the broadband access speed.
While the 802.16 standards provide a rich set of design options and a great deal of flexibility in defining the WiMAX related products, a significant challenge is often encountered in the selection of the most appropriate set of features & parameters and in finding the desirable deployment scenarios. The tutorial will provide an overview of the key features specific to the 802.16 standards and will discuss the mobile WiMAX profiles that are being established by the WiMAX Forum which is aiming at insuring interoperability between different manufacturers’ equipment. Flexible radio resource management options will be discussed as well by looking into different design and deployment options (e.g. subchannelization, selection of OFDMA burst types to exploit diversity in frequency and time and control the overhead, channel sensitive scheduling, interference management) along with their impact on the system and end user performance. Finally, a comparison of key features with other ongoing OFDM based broadband standardization efforts (3GPP Long Term Evolution and 3GPP2 RevC) will be discussed.
Doru Calin has over ten years of experience in wireless networks design and analysis and has been a Member of Technical Staff in Bell Laboratoriess, Lucent Technologies in Holmdel, New Jersey since March 2001. He holds M.S. degrees in electrical and computer engineering, and received his Ph.D. in electrical and computer engineering from the University of Versailles, France. His current research interests are in the areas of broadband wireless systems design, cross-layer optimization, converged networks and performance analysis. At Bell Labs, Dr. Calin has had main lead responsibilities and worked on a multitude of projects in areas including wireless voice and data network technologies, 3G wireless network planning and optimization, creation of wireless services and economical analysis, wireless geo-location techniques and wireless ad-hoc networks. Prior to joining Bell Labs, he was a researcher at the Institute National des Telecommunications (Telecom INT), France, a technical consultant for Bouygues Telecome (a wireless service provider), and a Senior Research Engineer at Motorola Labs in Paris, France. Dr. Calin is a Senior Member of the IEEE and has published over 30 papers in scientific Journals, book chapters and refereed conferences. He holds four issued patents and has co-authored over fifteen pending patents in the area of wireless networks and algorithms design. He has received a number of major awards, including the Bell Labs President’s Gold Award and Motorola 3GPP standard award.