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Wireless technology has
had a lot of development
and growth in the recent
years and one thing that
has had great development
has been mobile phone.
Mobile phones are also
known as cell phones or
cellular phones or simple
cells that are used by
millions of people
worldwide for long and
short distance
communication. Since its
introduction in late 1970, it
has greatly affected the
activities we do on a daily
basis. Many benefits of
mobile phones include
ease of interacting with
each other. Mobile phones
work as a clock. Mobile
phone alarms wake us up
in the morning. Mobile
phones scheduler reminds
us of important occasions
like birthdays, parties, etc.
Mobile phones work as
mobile video games.
Mobile phones work as
moving stereo systems.
International roaming
technology of mobile
phones helps us interact
with our friends and
relatives anywhere in the
world. SMS, MMS, and calls
are used by advertisers to
advertise and sell their
products via mobile
phones. We are able to
operate our bank accounts
with mobile phones with
phone banking.
International mobile calls
are cheaper than
international landline calls.
Mobile phones help us in
times of emergencies and
natural calamities. Mobile
phones for handicapped
are of much more benefit
for example visually
impaired people can buy
talking phones when they
are unable to read text
messages. Moreover,
mobile phones have
converted from a luxurious
item to an item of
necessity. Mobile phones
have become a primary
tool for everyone, let it be
an ordinary man or a
businessman. Benefits of
mobile phones also include
that they make all of us
feel safer and more
productive than before. It is
interesting to note that
cellular telephony was
designed and launched
strictly for voice cellular
technology and was
responsible to transport
voice data, but today this
technology is able to
provide various services like
audio and video streaming,
radio transmission,
multimedia data
transmission such as MMS,
and other multimedia
applications touching the
limits of technology.
See all 5 photos
Mobile phones of the
future
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All these technological
advancements of cellular
telephony have greatly
benefited the humans.
Also due to this, today’s
wireless technology has
enabled applications which
ease up the tasks like
language translator
applications on cell
phones, ovulation cycle
calculator on android
phones but all these
applications require greater
bandwidth consumption.
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How Do Cell Phones
Work? (Science in the
Real World)
How Wireless Works (2nd
Edition)
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Version with Warranty
(Blue)
Amazon Price: $119.99
List Price: $159.00
Wireless Extenders zBoost
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Cell Phone Signal Booster
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Plantronics M214C Headset
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How Cell Phones Work?
In the past, the idea of
cellular technology was
diving whole city into small
cells. This idea allowed re-
use of frequencies
throughout the city which
helped in allowing millions
of people to interact on
their cell phones at one
point of time. In analog
telephony, the cell phone
network provider used to
receive around eight
hundred frequencies to be
used throughout each city.
Then, the network provider
divided each city into small
cells. Each cell usually
consisted a size of
approximately 26 km2. Cell
phone network providers
designed these cells as six
sided figures or hexagons.
Now, cellular network
providers divided each cell
with a base station which
consisted of one tower and
one small building
containing some radio
equipment. Now each cell
in analog system used
1/7th of voice channels, i.e.,
a cell plus 6 cells
surrounding the hexagonal
arrangement and each
used 1/7th of available
channels, so each cell had
a different set of
frequencies and no
collisions with each other.
A cellular network provider
got eight hundred and
thirty two radio frequencies
to use in one city.
How cell phones work?
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Each mobile phone used 2
frequencies for one call, so
there were 395 voice
channels/carrier signal and
the remaining forty two
frequencies were used for
control channels.
Now it is interesting to
note that each cell
consisted of about fifty six
voice channels which in
simple terms mean that
fifty six cell phones users
were interacting on their
mobile phones at one
point of time.
But with the introduction
of digital transmission, the
no. of available cell phone
channels increased.
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Latest Nokia Mobile Phone
Cell phones are in low
power transmitters. Many
cell phones consist of two
signal strengths: 3.0 watts
and 0.6 watts. Cellular
stations are also
transmitting low signals.
These low-power
transmitters have two types
of advantages and that are:
First of all, transmission of
base station and phones in
same cell do not leave it.
Therefore, it was possible
for every cell to reuse same
fifty six frequencies across
the whole city. Secondly,
power consumption of cell
phone, usually battery
operated, is relatively low.
Low power means small
batteries, which makes cell
phones light and easy to
use. So this was how cell
phones work. In my next
hub, I will write on history
of cell phones and what is
inside the cell phones.
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