We all are familiar with wireless technology. Of these the hottest technology used today is the WiMAX technology. In fact, WiMAX systems are used to provide broadband access services to enterprise and residential customers in a cost-effective way. It could be a standardized wireless version of LAN meant primarily as an alternative to wired technologies (such as DSL, Cable Modems and T1/E1 links) to supply broadband access to customer premises.
More strictly, WiMAX is a business trade organization formed by leading communications, component and equipment corporations to certify and market compatibility and interoperability of broadband wireless access equipment that conforms to the standards such as ETSI HIPERMAN and IEEE 802.16.
WiMAX would operate like Wi-Fi however at higher speeds over larger distances and for a larger variety of users. WiMAX has the power to supply service even in areas that are tough for wired infrastructure to reach and also the ability to overcome the physical limitations of traditional wired infrastructure.
Now let us see what a mobile WiMax is? Mobile WiMax is a broadband wireless technology that allows convergence of fixed and mobile broadband networks through a flexible network architecture and typical wide area broadband radio access technology. The Mobile WiMax Air Interface uses Orthogonal Frequency Division Multiple Access (OFDMA) for improved multi-path performance in non line-of-sight environments. Scalable OFDMA (SOFDMA) is introduced in the IEEE 802.16e Amendment that supports scalable channel bandwidths ranging from 1.25 to 20 MHz.
Now let us see some of the benefits of WiMax.
- Very high Internet browsing speed
- Data Upload/download at very high speed up to 7Mbps
- One of the latest wireless broadband technology in the World
- Superior Performance
- Wide range of User friendly plans
- Very low starting tariff and low price
Mobile WiMax systems provide scalability in both network architecture and radio access technology. Thus providing an excellent deal of flexibility in network deployment options and service offerings.
A number of the salient features supported by Mobile WiMax are:
- High Data Rates. The use of MIMO (Multiple Input Multiple Output) antenna techniques together with flexible sub-channelization schemes. Advanced coding and Modulation all modify the Mobile WiMax technology to support peak UL data rates up to 28 Mbps per sector and DL data rates up to 63Mbps per sector in a 10 MHz channel.
- Quality of Service (QoS). The basic premise of the IEEE 802.16 MAC design is QoS. It defines Service Flows which may map to Diff Serv code points that enable end-to end IP based QoS. In addition, sub channelization schemes offer a flexible mechanism for optimum scheduling of space, time and frequency resources over the air interface on a frame by-frame basis.
- Despite an increasingly extended economy, spectrum resources for wireless broadband worldwide are still quite disparate in its allocations. Mobile WiMax technology thus, is intended to be able to scale to work in several canalizations from 1.25 to 20 MHz to suits varied worldwide necessities as efforts proceed to attain spectrum harmonization in the long term.
- Support for a various set of user credentials exists including; smart Cards, SIM/USIM cards, Username/Password schemes, and Digital Certificates.