Ministry of higher and secondary special education of the republic of uzbekistan the ministry for development of information
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Manual Wireless networks
- Bu sahifa navigatsiya:
- Wi-Fi access
- A WiMAX system consists of two parts
Laboratory work #14
Theme: Study of the parameters of WiMaX networks Purpose of work: Learn parameters of WiMaX networks. Study the design principle and parameters of WiMaX networks. Dial-up access : pay for a local call every time we dial the Internet. In addition phone line is engaged while we are on the Internet. Broadband access : In your home, you have either a DSL or cable modem. At the office, your company may be using a T1 or a T3 line. Wi-Fi access : In your home, you may have set up a Wi-Fi router that lets you search the Web while you are connecting with your laptop. On the road, you can find Wi-Fi hot spots in restaurants, hotels, coffee shops and libraries. WiMAX stands for Worldwide Interoperability of Microwave Access, is a wireless Internet service designed to cover wide geographical areas serving large number of users at low cost. The main problems with broadband access are that it is more expensive and it doesn't reach all areas. The main problem with Wi-Fi access is that hot spots (access point of wireless network) are very small, so coverage is small. Due to these problems we are using advance technology called WIMAX Fig.14.1. Types of network. WiMax is a foundation set on the IEEE 802.16 standards. However the name given to WiMax was suggested by WiMax Forum in 2001.WiMax technology is 104 also termed as wireless broadband this is because it is believed that it can replace DSL cable network. Wimax defining wide area wireless data networking. A WiMAX system consists of two parts TRANSMITTER A single WiMAX tower can provide coverage to a very large area – as big as 3,000 sq. miles. RECEIVER The receiver and antenna could be a small box or PCMCIA card or they could built into a laptop as the way Wi-Fi access is today. Fig.14.2. WiMAX network system architecture. ❑ WiMAX uses microwave radio technology to connect computers to the internet in place of wired connections such as DSL or cable modems. ❑ It works very much like cell phone technology in that reasonable proximity to a base station is required to establish a data link to the Internet. ❑ Users within 3 to 5 miles of the base station will be able to establish a link using NLOS technology with data rates as high as 75 Mbps. ❑ Users up to 30 miles away from the base station with an antenna mounted for LOS to the base station will be able to connect at data rates approaching 280 Mbps. |
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