Computer And Technologies

Computer And Technologies: What is WiMAX?

Wednesday, 22 April 2009

What is WiMAX?

WiMAX (World Interoperability for Microwave Access), is a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL. WiMAX will provide fixed, nomadic, portable and mobile wireless broadband connectivity without the need for direct line-of-sight with a base station. In a typical cell radius deployment of 3 to 10 kilometers, WiMAX Forum Certified systems can be expected to deliver capacity of up to 40 Mbps per channel, for fixed and portable access applications. This is enough bandwidth to simultaneously support hundreds of businesses with T-1 speed connectivity and thousands of residences with DSL speed connectivity. Mobile network deployments are expected to provide up to 15 Mbps of capacity within a typical cell radius deployment of up to three kilometers. WiMAX technology already has been incorporated in notebook computers and PDAs, allowing for urban areas and cities to become “MetroZones” for portable outdoor broadband wireless access.
There are two main applications of WiMAX today:
Fixed WiMAX (IEEE802.16-2004) applications are point-to-multipoint enabling broadband access to homes and businesses, whereas mobile WiMAX (IEEE802.16e) offers the full mobility of cellular networks at true broadband speeds. Both fixed and mobile applications of WiMAX are engineered to help deliver ubiquitous, high-throughput broadband wireless services at a low cost.
Mobile WiMAX is based on OFDMA (Orthogonal Frequency Division Multiple Access) technology which has inherent advantages in throughput, latency, spectral efficiency, and advanced antenna support; ultimately enabling it to provide higher performance than today's wide area wireless technologies. Furthermore, many next generation 4G wireless technologies may evolve towards OFDMA and all IP-based networks as an ideal for delivering cost-effective wireless data services.


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