| The information age has been revolutionized | | | | to get rid of the hassles of laying cables. |
| not just by the power of computers to process | | | | The mobile wireless systems support mobility |
| data, but also by the power of communication | | | | of the equipment, enabling the user to access |
| amongst computers. This communication is | | | | information from anywhere and at any time. |
| responsible for the proliferation of computer | | | | The equipments used in the mobile wireless |
| networks. Sharing of information, sharing of | | | | systems include personal digital assistants |
| resources (both software and hardware) and | | | | (PDAs), smart phones and pager with Internet |
| sharing of processing load are some of the | | | | access.Wireless networks communicate by |
| major objectives of a computer network. One | | | | modulating radio waves or pulsing infrared |
| of the recent trends in the computer and | | | | light. A wireless networking router is linked |
| communication industries is wireless | | | | to the wired network infrastructure by |
| communication. A wireless network does not | | | | stationary transceivers. Wireless |
| use cables, but instead uses radio waves. | | | | communication technologies used in wireless |
| Such networks enhance the functionality of | | | | networks include analog cellular, digital |
| computing devices by freeing them from the | | | | cellular, Cellular Digital Packet Data |
| location constraints of a wired network. | | | | (CDPD), mobile radio networks, personal |
| Although wireless networking is of great use | | | | communication services (PCS), satellite, |
| to the laptop users who move from one | | | | microwave systems and local multipoint |
| location to the other throughout the day, | | | | distribution systems (LMDS). Although the |
| there are benefits for fixed users as well. | | | | data rates supported by analog cellular |
| Many schools and businesses have an | | | | technology are low, it is the most popular |
| architecture that is unsuited for a wired | | | | methods for wireless data communications due |
| network. Wired networking is very cost | | | | to the wide availability of modems and analog |
| effective in such environments.Wireless | | | | cellular services. The commonly used |
| networks can be broadly classified as fixed | | | | wireless technologies include 2G and 3G |
| wireless systems and mobile wireless systems. | | | | technologies, wireless LANs, Wireless Local |
| A fixed wireless system supports a little or | | | | Loops (WLLs), radio-router technology, |
| no mobility of the equipment related to the | | | | Multihop wireless network and Wireless |
| wireless network. For example, a local area | | | | Application Protocol (WAP). |
| network can be set up using wireless network | | | | |