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Viking
king Harald Bluetooth Gormsson united Denmark and Norway. Bluetooth united
communication protocols and led to the formation of Bluetooth SIG which consisted
of five members Ericsson, Intel, Nokia, Toshiba and IBM. King Herald had a
rotten teeth (that looked kind of bluish), hence earned him the name Bluetooth.
Bluetooth
is a virtual cord or wireless short range radio technology used to exchange
data between fixed and mobile devices using short wavelength ultra high
frequency (UHF) radio waves. It consists of transreceiver to send and receive
signals. The communication doesn’t require the devices to be on the line of
sight and several devices can be connected to the personal area networks (PANs)
formed by Bluetooth.
Bluetooth
radio waves frequency range is from 2.402 GHz to 2.480 GHz. It has 79
designated channels and each channel has a bandwidth of 1 MHz. One reason why
Bluetooth communication doesn’t interfere
with other networks or even other Bluetooth networks is because it
change its channels (79 in total) at a frequency of 1600 times /second.
The
different networks formed by Bluetooth are as follows.
1.
Piconet
In
this Bluetooth network there is one master device and one slave device.
2.
Multiple piconet
In
this Bluetooth network there is one master device and at most seven slave
devices. There cannot be slave to slave communication; only master and slave
communication is allowed.
3.
Scatternet
In
this Bluetooth network there are several multiple piconets connected together
of which one multiple piconet act as master and other multiple piconets act as
slaves.
Classes
of Bluetooth refer to the power of Bluetooth devices. These are as follows:
1.
Class 1
Maximum
power- 100 mW(milli Watt); operating range- 100 meters
2.
Class 2
Maximum
power- 2.5 mW ; operating range- 10 meters
3.
Class 3
Maximum
power- 1 mW ; operating range- 1 meter
Benefits
of Bluetooth:
1.It does not interfere with other wireless
devices.
2.It is upgradeable.
3.It’s power consumption is low.
4.The communication doesn’t require the
devices to be in line of sight.
5.Bluetooth devices are cheap.
6.Bluetooth has been adopted in a number of
devices.
7.Simple setup.
Problems
with Bluetooth:
1.Security can be an issue.
2.Privacy can get compromised.
3.Only short range communication is possible.
4.Bluetooth low power design limit its data
communication speed.
Bluetooth
is a technology which is here to stay. So understanding this technology would
make us aware about the points that we should keep in mind while using this
technology.
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