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Performance Evaluation of WiMAX/IEEE 802.16 OFDM Physical Layer - page 15 / 107

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Chapter 2

IEEE 802.16: Evolution and Architecture

This chapter discusses the evolution of the IEEE 802.16 standard for BWA to form the basis for further discussion. The protocol layers of the standard have been overviewed to get the idea of interaction between different protocol stack. The chapter ends up with a brief discussion of the IEEE 802.16 based network architecture, deployment topology, application scenarios and its affiliation with WiMAX forum.

2.1 Evolution of IEEE family of standard for BWA

In late 90’s many telecommunication equipment manufacturers were beginning to develop and offer products for BWA. But the Industry was suffering from interoperable standard. With the need of a standard, The National Wireless Electronics Systems Testbed (N­WEST) of the U.S National Institute of Standards and Technology (NIST) called a meeting to discuss the topic in August 1998 [6]. The meeting ended up with a decision to organize within IEEE 802. The effort was welcomed in IEEE 802, which led to formation of the 802.16 Working Group. Since then, the Working Group members have been working a lot to develop standards for fixed and mobile BWA. IEEE

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