A sample text widget

Etiam pulvinar consectetur dolor sed malesuada. Ut convallis euismod dolor nec pretium. Nunc ut tristique massa.

Nam sodales mi vitae dolor ullamcorper et vulputate enim accumsan. Morbi orci magna, tincidunt vitae molestie nec, molestie at mi. Nulla nulla lorem, suscipit in posuere in, interdum non magna.

List out the characteristics of Personal Area Network

– Personal area network or PAN is a computer network used for communicating from one computer device to another and includes PDAs (personal digital assistants) and telephones.
– PAN has been named so because it is used for interpersonal communication i.e., for communication among personal devices.
– The network can even be used for making connections of higher level network called an up-link and internet.
– When the connection is established through wireless technologies, it is termed as wireless personal area network or WPAN.
– Here the communication info or data is carried over wireless technologies such as:
1. IrDA
2. Bluetooth
3. Z- wave
4. Wireless USB
5. zigBee

– In some cases, data might also be carried over a body area network.
– The range of a wireless PAN varies from a few centimeters to few meters.
– A PAN can also be established over wired communication technologies such as fire-wire and computer buses like USB.
– A WPAN interconnects the devices that are centered on or around the work space or immediate vicinity of an individual.
– It connects those devices that are wireless.
– The standard used by WPAN is IEEE 802.15. 2 main wireless technologies used by WPAN are:
1. Bluetooth and
2. Infrared data association

– Almost all ordinary communicating devices can be interconnected using WPAN.
– Devices that work over a PAN are the ones that people use daily and carry with them.
– In some cases, PAN serves a more critical and special purpose i.e., it allows surgeons to communicate while performing an operation.
-‘Plugging in’ is the key concept behind the WPAN technology.
The concept can be explained as follows: When two devices equipped with WPAN technology come in to the proximity of each other, they can communicate as they would have done via cables.
– Each device has the ability to lock out other devices to which connection is not required which is another characteristic feature of the personal area network.
– This characteristic is required to prevent unnecessary interference and for blocking unauthorized access.
– The technology behind WPAN is still under development.
– The operational mode for the frequencies is around 2.4 GHz. For a device to be able to connect to other device in the same WPAN it is require that they lie in physical ranges of each other.
– Short range radio waves are used by Bluetooth that can cover up a distance up to 10m approx.
– A PAN as a resultant of Bluetooth operation is termed as piconet and may have at the most 8 devices forming a master–slave relationship.
– The slaves are the devices that communicate with the master.
– Contrary to the typical range of 10m, communication can be established up to a range of 100m under ideal conditions.
– IrDA, as the names suggests makes use of infrared light.
– This light possesses a frequency to which the human eye is not sensitive.
– This technology is particularly used in remote controls.
– Other devices that make use of IrDA WPAN network are keyboards, printers, serial data interfaces and so on.
– WiFi is another WPAN technology that uses radio waves and provides coverage of up to 91m.
– Local area networks can be connected through Wifi.
Even cell phones can be connected to internet through Wifi and one can download many types of files.
– Video game consoles such as Nintendo Wifi connection use this technology for connecting to the local area networks.
– Body area networks are defined by IEEE 802.15.6 standard and are used for near field communication of the devices that are either present around the devices or worn by a human.
– Skinplex is such a device and can establish communications up to a range of 1m.
– This technology is used in convertible car roofs and access controllers for door locks.

Leave a Reply

You can use these HTML tags

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>