Wireless Metropolitan Area Network (WiMAX – IEEE 802.16)



WiMAX is is a telecommunications technology that provides for the wireless transmission of data in a variety of ways, ranging from point-to-point links to full mobile cellular-type access. The technology is based on the IEEE 802.16 standard (also called WirelessMAN). The name "WiMAX" was created by the WiMAX Forum, which was formed in June 2001 to promote conformity and interoperability of the standard. The forum describes WiMAX as "a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL".

WiMAX technology supports higher speed as 70Mbps and a range of WiMAX up to 48 kilometers. WiMAX allows higher data rates over longer distances, efficient use of bandwidth and avoid interference almost to a minimum.It also providing high speed mobile data and telecomunication service. It also providing a diverse source of internet connectivity as part of a business continuity plan .Beside, the costs to install a WiMAX station in conjunction with an exiting cellular tower or as a solitary hub are cheap compare to developing wired solution.It also help expend business, drive down costs, increase overall profitability, increase quality of services.

Wireless Local Area Networks (WiFI- IEEE 802.11)

Wireless Local Area Networks (WiFI- IEEE 802.11)


WiFi is a brand originally licensed by the WiFi alliance to describe the underlying technology of Wireless Local Area Network (WLAN) based on the IEEE 802.11 specifications.A Wireless LAN (WiFi) is data transmission system designed to provide location-independent network access between computing devices by using radio waves rather than guided medium.

The WiFi speed standard offered around 108Mbps.The range feasibility for WiFi also depanding the environment. Typical indoor ranges are between 150-300 feet.Outdoor range are around 1000 feet.WiFi can also be used to create a mesh network. WiFi also allows connectivity in peer-to-peer (Wireless ad-hoc network) mode which enables devices to connect directly with each other.

When the technology was first commercialized there were many problems because consumers could not be sure that how the products from different vendors would work together. The WiFi alliance began a community to solve this issue so as to address the needs of the end user allow the technology to mature.
The alliance created the branding WiFi certified to show consumer that predict are interoperable with other products displaying the same branding.

A WiFi wireless, it also have weakness of their behavior such as it have same properties as non-switches wired when it transmits in the air. The typical range also will affect interferences with radio transmissions. Beside, it also cannot do collision detection and instead uses a packet exchange (RTS/CTS used for collision Avoidance or CA) to try to advoid collision channels.

Wireless is a term used to describe telecommunications in which electromagnetic waves (rather than some form of wire) carrythe signal over part or all of the communication path. Some monitoring devices, such as intrusionalarms, employ acoustic waves at frequencies above the range of human hearing; these are also sometimes classified as wireless.


The first wireless transmitters went on the air in the early 20th centuryusing radiotelegraphy (Morse code). Later, as modulation made it possible to transmit voicesand music via wireless, the medium came to be called "radio." With theadvent of television, fax, data communication, andthe effective use of a larger portion of the spectrum, the term "wireless" hasbeen resurrected.