Mobile communication allows two people to communicate wirelessly using electromagnetic waves that transmit voice and data at the speed of light. When a call is made, the phone sends a digital identification code that is received by the nearest cell tower, which forwards it to the central communications server to connect the call. The signals are then boosted, digitalized and sent back and forth between the two phones through full or simplex communication. Technologies like GSM use digital cellular networks to support voice calls and data transfer including SMS, using secure subscriber identity modules on SIM cards. Mobile communication enables ubiquitous computing through seamless use of computers to simplify daily life.

1. Mobile Communication

2. What is mobile
communication?
 Communication between two people on a
wireless cellular network or landline.
 Transmitting voice and data using
electromagnetic waves i.e data travels at the
speed of light.
 It can be simplex or full-duplex.

3. How mobile communication
works?
 Sends out digitalized identification code
 When a number is dialed the signal is received by
the cell tower, it forwards it to the central
communications server which makes a connection
to the number you called
 Once the communication is active, the signals are
boosted and digitalized and sent back and forth
between the two phones

5. GSM (Global System for Mobile communication):
 Open, digital cellular technology used for transmitting mobile
voice and data services
 Supports voice calls and data transfer speed together with
transmission of SMS (Short Message Service)
 Key features include SIM card i.e Subscriber Identity Module
 SIM card is a safe way to use mobile communication because
your data is secure and only accessible by you

7. Need for Mobile Communication
 Ubiquitous computing
 Pushing the computers to the background
o Use computers seamlessly to help you and to make
your life more easier.

8. Some technical terms:
 Mobile Switching Center(MSC): Basically a
switching center which routes the calls in a
large area
 Subscriber: user who pays subscription
charges for mobile communication
 Transceiver: device capable of transmitting
and receiving radio signals

9. THANK YOU