This document summarizes a seminar presentation on mobile communication processes. It describes the key components of a cellular communication system including the mobile switching center (MSC), base station subsystem (BSS), base transceiver station (BTS), and base station controller (BSC). It also discusses the types of antennas used, including omni-directional and sectored antennas. Finally, it provides a brief overview of modulation basics and how optical fibers are used for transmission in cellular networks.

1. RAAJDHANI ENGINEERING COLLEGE
A
seminar
presentation
on
MOBILE COMMUNICATION PROCESS
Presented by:
Guided by: Sudhanshu jha
Prof S.Mishra 1201294227
E.C.E

2. CONTENT

3.  What is Cellular Communication
System
• Cellular communication is designed to provide
communications between two moving units, or
between one mobile unit and one stationary phone or
land unit (PSTN).
• A service provider must be able to locate and track a
caller, assign a channel to the call.
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4. RAAJDHANI ENGINEERING COLLEGE

5.  COMPOMENT OF CELLULAR COMMUNICATION
 Main component in cellular communication system.
 Mobile Switching Centre (MSC).
 Base Station Subsystem (BSS).
 Base Transceiver.
 a. Base Transceiver Station (BTS).
 b. Base Station Controller (BSC).
 optical fibre
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6.  Mobile Switching Center (MSC)
• The MSC is the heart of the GSM network.
• the main role f MSC is to manage the communication
between the GSM user and other telecommunication
network.
• One MSC can handles multiple BSCs and also interfaces
with other MSC's (Using E-Interface).
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7.  Ericsson Mobile Switching
Centre Server (MSC-S)
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8.  Mobile Switching Center (MSC)
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9.  Base Station Subsystem (BSS)
• BSS is responsible for handling traffic and signaling between
a mobile phone and the NSS.
• The BSS performs all the radio-related functions.
• The BSS is comprised of the following functional units:
• Base Station Controller (BSC)
• Base Transceiver Station (BTS)
• BSS communicate to Mobile Station (MS) using Air Interface
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10. Base Station Subsystem (BSS)
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11. 
Base Transceiver Station (BTS)
•A BTS can transmit or receive radio signal from a
mobile unit
•To perform this function completely the signal
are encoded, encrypted, multiplexed,
modulated and then fed to the antenna.
•Each BTS has between 1 to 16 transceiver
depending on density of the user in the cell
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12. 
Base Transceiver Station (BTS)
• BTS provides physical connection between MS to network using Air
Interface (Um)
• Main function of BTS is for maintaining the Um interface and
minimizing the transmission problem (Um very sensitive for
disturbance)
• Using A-bis interface for connection between BTS and BSS
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13.  Diagram of BTS
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14.  Base Station Controller (BSC)
•A BSC can assign the channel
•BSC can control many BTS .
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15.  Base Station Controller (BSC)
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16. Types of Antenna Used in Cellular
Communication System
a. Omni directional Antenna
b. Sectorized Antenna
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17.  Omni Directional
•The omnidirectional antenna radiates or
receives equally well in all directions.
•It is also called the "non-directional"
antenna because it does not favor any
particular direction.
•This antenna is built using a metallic bar
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18.  DIAGRAM OF Omni Directional
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19.  Sectored Antenna
• In sectorized cell, it can be either edge excited or centre excited. In a
centre excited cell, it can be a 3x120o and 6x60osectors while in the edge
excited, the BTS is located at the edge of the cell and provides coverage
to multiple(3) cells.
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20.  What is optical fiber ?
A optical fiber is a type of cable which
transmits information though light source.
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21. TRANSMISSION SEQUENCE
1. Information is encoded into electrical
signals.
2. Electrical signals are converted into light
signals.
3. Light travels down the fiber.
4. A detector changes the light signals into
electrical signals.
5. Electrical signals are decoded into
information.
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22. Modulation Basics
• The primary difference between analog and digital modulation is the
source information.
• If the source is analog, the modulation is analog.
• If the source is digital, the modulation is digital.
• The carrier is always analog
• The modulated wave is always propagated through the air as a series
of sine or cosine waves - not pulses!
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•
22

23. Modulation Basics
23
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24. conclusion
• This presentation gives the idea about mobile communication
process and we easily understand how we communicate from one
place to another place by mobile.
• Its give the knowledge about system which use and how it used.
• This representation gives brief information about communication
resources