WiMAX Introduction WiMAX in Simple Terms Huang Zhi, IP and Broadband Access Department, Ericsson (China) Communications Co., Ltd. Recently, the term WiMAX has been constantly impacting people\'s vision. Some people say it will be a supplement to 3G, some say it will pose a threat to mobile operating networks, and some say it is a technical means of wireless broadband access. So, what is WiMAX, and what is its current status and future? Let\'s discuss these issues below. 1. What is WiMAX? WiMAX is the abbreviation of World Interoperability for Microwave Access. It is based on the IEEE 802.16 standard. Its original intention is to provide point-to-multipoint broadband wireless access in a multi-vendor environment in a metropolitan area network. Therefore, WiMAX is often called IEEE Wireless MAN (Metropolitan Area Network). This technology involves the work of two international organizations: the IEEE 802 Standards Committee 802.16 Working Group and the WiMAX Forum. The IEEE 802.16 Working Group is the standard setter; the WiMAX Forum is the promoter of the IEEE 802.16 technology. The following text introduces the standard evolution and application mode respectively. From Figure 1, we can see the technical positioning of WiMAX, which realizes high-speed data access in wireless environment in metropolitan area network. End-user bit rate1 Gbit/s4G UWB 4G 802.11g,a 802.11b 802.16 802.203G Evolved DVB-T100 Mbit/s 10 Mbit/s 1 Mbit/sBluetooth100 kbit/s 10 kbit/sDVB-H3G 2GDVB-HDECTPAN LAN MANRFIDWANCoverageFigure 1 Comparison of technical positioning of several wireless technologiesFigure 2. Evolution of WiMAX standardsFrom the evolution of WiMAX standards, we can clearly see the process of this technology itself…
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