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BASIC PRINCIPLES

In wireless technology, data is transmitted over the air. Wireless solutions are ideal platforms for extending the concept of home networking into the area of mobile devices around the home. Consequently wireless technology is portrayed as a new system that complements phone-line and powerline networking solutions. It is likely that wireless technology will not emerge as a home network backbone solution, but will instead serve to interconnect the class of devices that need mobile communications into a subnetwork. These mobility subnetworks will interface with other subnetworks and with the Internet by connecting to the home network backbone. Wireless home networks transmit and receive data over the air, minimizing the need for expensive wiring systems. With a wireless-based home network, you can access and share expensive entertainment devices without pulling new cables through walls and ceilings. At the core of wireless communication is a device called a transmitter and one called a receiver. The user interacts with the transmitter—for example, one of the children in puts a URL into their PC. This input is then converted by the transmitter to electromagnetic (EM) waves and sent to the receiver, which could be built into the set-top box. The receiver then processes these electromagnetic waves. For two-way communication, each user requires a transmitter and a receiver. Consequently, many of the homes networking device manufacturers build the transmitter and receiver into a single unit called a transceiver. The operation and functionality of a wireless and wired home network remain the same; however, there are distinctions in the technologies used to achieve the same objectives.

The two main technologies used in wireless home networks are:


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