internet wireless

Wireless Internet Access
The term wireless internet refers to a method of sending and receiving data across the internet rather than using wires. It uses radio frequency bands which operate in the 3 KHz to 300 GHz range and it can be accessed from anywhere unless you are within the geographical network coverage area. Today 3rd generation or 3G is the term used for the next generation of wireless internet providers or mobile communication. Also coming soon a cellular standard that should be called 4G, developed in Japan will boost the data rate to 20 Mbps.

Below are some of the types of technologies in wireless internet service

Cellular Internet
Cellular Internet service is based on a cellular architecture that consists of a backbone network with fixed base stations interconnected through a the wired switched telephone network The geographic area within cell phones can communicate with a particular base station is called a cell. Adjacent cells overlap with each other, thus ensuring continuity of communications when the users move from a territory of one cell to another cell. The user mobile units communicate with each other, as well as with other networks, through the base stations and the backbone network. A specific radio frequency is allocated to each base station. Neighboring cells have to use different channels in order to avoid intolerable interferences.

Hotspot wireless internet
Lots of places now offer wireless service of high speed Internet access, including Airports, Hotels, Coffee Shops, Internet Cafes and Restaurants. These locations are called “Hotspots". Many charge a daily or hourly rate for access, but some are free. Hotspots use standards of WLAN. The most common standard is IEEE 802.11b also called WiFi which offers a connection speed of 11 megabits per second. Other standards are 802.11a (55 megabits per second) and the latest standard '802.11g', which is compatible to 802.11b, but also operates on 55 megabits per second.

Satellite Internet
Satellite communication is used for Rescue services. Also Maritime industry, Oil, Gas and Mining industry, Transportation and Traveling , Army and Navy, have the privilege to use this technology.. Today this type of communication insures the better quality than traditional radio systems. To receive a Satellite service, user needs an antenna with transmitter aimed at the correct satellite and a very specialized modem which connects to his computer. Two-way satellite Internet sends data from remote sites via satellite to a hub, which then sends the data to the Internet.