WIMAX

WiMAX refers to Worldwide Interoperability for Microwave Access which is considered to be one of the popular broadband wireless technologies. It is created by WiMAX forum. WiMax is a scalable wireless platform which is an alternative to wired technologies to provide complementary broadband access to the customer premises. It is based on wireless MAN and IEEE 802.16 wireless communication standards. Compared to Wi-Fi technology, it operates at high rate and speed , long distance with many users. It is designed to provide a high data rate of 1 giga-bits/s and it provides MAC and multiple physical layers

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WiMax services

WiMax provides two types of services:

  • Non-line-of-sight
  • Line-of-sight

Non-line-of-sight – In this service, the computer is connected  to the WiMax tower using a small antenna. It uses a very low frequency range of 2GHz to 11GHz.

Line-of-sight – In this type of service, a fixed rooftop antenna is connected to the WiMax tower. It is can send a large amount of data with minimum errors and is more stable compared to non-line-of-sight.

Importance of WiMax

WiMax is very important due to the following reasons listed below:

  • Satisfies the needs for the extension of the existing broadband capabilities.
  • Delivers a very high bandwidth with a low cost of operation.
  • Meets the ever-increasing demands of the customers.
  • It has a better quality of service and has more coverage area.
  • With the existing technologies, it can be easily integrated.

Features of WiMax

  • The area of coverage is about 50 km from base station.
  • The speed ranges upto 70 megabits/ second.
  • Line-of-sight service is not required between the base station and the user.
  • Frequency range is about 2-11 GHz and 10-66 GHz.

Components of WiMax

WiMAX Base Station

The base station of WiMAX provides an area of coverage upto a radius of 6 miles. Any wireless devices would be able to access the Internet.

In an area called cell, a wireless coverage is provided by each base station. In general, maximum radius of a cell is about 50 km or 30 miles but, by practical considerations the limit is about 10 km or 6 miles.

WiMAX Receiver

A WiMAX receiver is also referred to as CPE – (customer premise equipment) which has separate antenna or a PCMCIA card sitting in laptop or any other device. The base station of WiMAX is similar to access a wireless access point in the Wi-Fi network, but the coverage area of WiMAX is larger.

Backhaul

Backhaul refers to the connection of the base station to the core network and access point back to the base station. Several base stations can be connected to one another using high-speed backhaul microwave links.  Through a wired connection of high bandwidth, a WiMax tower gets connected to a high-speed internet. It can also be connected using line-of-sight service to the other WiMax tower. WiMax provides service to a large coverage area through this connection with the tower

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