RAAJDHANI ENGINEERING COLLEGE A seminar presentation on

MOBILE COMMUNICATION PROCESS

Presented by:Guided by: Sudhanshu jha Prof S.Mishra 1201294227 E.C.E

What is CELLULAR COMMUNICATION

COMPONENT OF CELLULAR COMMUNICATION

OPTICAL FIBER COMMUNICATION

ANTENNA IN CELLULAR COMMUNICATION

CELLULAR COMMUNICATION CONCEPT

BASIC MODULATION CONCEPT

CONTENT

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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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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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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Ericsson Mobile Switching Centre Server (MSC-S)

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Mobile Switching Center (MSC)

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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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Base Station Subsystem (BSS)

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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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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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Diagram of BTS

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Base Station Controller (BSC)

•A BSC can assign the channel•BSC can control many BTS .

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Base Station Controller (BSC)

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Types of Antenna Used in Cellular Communication System a. Omni directional Antennab. Sectorized Antenna

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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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DIAGRAM OF Omni Directional

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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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What is optical fiber ?A optical fiber is a type of cable which transmits information though light source.

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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. RAAJDHANI ENGINEERING COLLEGE

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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Modulation Basics

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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

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