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WiMAX/802.16 is a kind of network providing IP-based broadband wireless access to infrastructure networks such as the Internet. The two main envisioned applications are Web access and voice over IP. Highlights of WiMAX/802.16 are secure communications and broadband access in remote areas. This paper covers the background, physical layer, medium access control layer, mobility support, mesh mode and multi-hop relay operation of WiMAX/802.16. The paper ends with a presentation of thoughts for practitioners and a discussion of directions for future research.
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