Page 109 - DCAP311_DCAP607_WIRELESS_NETWORKS

Unit 6: Wireless PAN Systems

6.6 Summary Notes

A wireless network enables people to communicate and access applications and information
without wires.
Many types of wireless communication systems exist, but a distinguishing attribute of a wireless
network is that communication takes place between computer devices.
As with networks based on wire, or optical fiber, wireless networks convey information between
computer devices. The information can take the form of e-mail messages, web pages, database
records, streaming video or voice.
A wireless sensor network with multimedia capabilities typically consists of data sensor nodes,
which sense, for instance, sound or motion, and video sensor nodes, which capture video of
events of interest.
A Wireless PAN network does not use wires. They are more reliable as they have less number
of cables.
Ethernet is a physical and data link layer technology for local area networks (LANs). Ethernet
was invented by engineer Robert Metcalfe.
Phone-line networking is easy to install, inexpensive and fast, and it doesn’t require any
additional wiring.
The wireless method of communication uses low-powered radio waves to transmit data between
devices.

6.7 Keywords

Wireless sensor: network with multimedia capabilities typically consists of data sensor nodes,
which sense, for instance, sound or motion, and video sensor nodes, which capture video of
events of interest.
Small office/home office: (or single office/home office; SOHO) refers to the category of business
or cottage industry that involves from 1 to 10 workers.

Ethernet: is a physical and data link layer technology for local area networks (LANs).
Phone-line networking: is one of several ways to connect the computers in your home.
Wireless: is a term used to describe telecommunications in which electromagnetic waves (rather
than some form of wire) carry the signal over part or all of the communication path.

Wireless printing: is a cost-effective way to easily and flexibly produce barcodes wherever you
are.
Personal digital assistant (PDA): is a handheld computer. Personal digital assistants were
designed to replace non-electronic day planners.
Cellular network or mobile network: is a radio network distributed over land areas called cells,
each served by at least one fixed-location transceiver, known as a cell site or base station.

6.8 Review Questions

1. What are the basic types of synchronization methods for wireless networks?
2. Explain SOHO equipment’s.
3. Explain the procedure for designing a small home office .

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