Gsm Ppt 2e6f3s

N.E.S POLYTECHNIC BHANDUP

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GSM System For Mobile communication)

(Global

Submitted by Yogesh Alwe Tushar Pandav

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Outline 1. Introduction 2. Architecture of GSM 3. Features of GSM 4. Services of GSM 5. GSM Radio subsystem 6. Call processing in GSM

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Introduction  In 1982, the European Conference of Postal and

Telecommunications istrations (CEPT) created the GSM to develop a standard for a mobile telephone system that could be used across Europe.  The first GSM network was launched in 1991 by

Radiolinja in Finland with t technical infrastructure maintenance from Ericsson.

outline 1. Introduction 2. Architecture of GSM 3. Features of GSM 4. Services of GSM 5. GSM Radio subsystem 6. Call processing in GSM

Architecture of GSM HLR

MS

VLR

AUC

BTS BTS

PSTN

BSS

BTS MSC

ISDN

BTS MS

BTS

DATA N/W

BSS

BTS OMC

outline 1. Introduction 2. Architecture of GSM 3. Features of GSM 4. Services of GSM 5. GSM Radio subsystem 6. Call processing in GSM

Features of GSM  Roaming in European countries.  Use of SIM card.  Control of transmission power.  Frequency hopping.  Discontinuous transmission.  On air privacy for the .

outline 1. Introduction 2. Architecture of GSM 3. Features of GSM 4. Services of GSM 5. GSM Radio subsystem 6. Call processing in GSM

Services by GSM GSM services are classified into two types: Tele-services

 Data services

The services are divided into three categories:1. Telephone services. 2. Bearer service or data services.

3. Supplementary ISDN services

outline 1. Introduction 2. Architecture of GSM 3. Features of GSM 4. Services of GSM 5. GSM Radio subsystem 6. Call processing in GSM

RADIO SUBSYSTEM Time frame

890MHz 200KHz

TS0 576.92uS TS1

uplink

4.615mS 1 Frame

25MHz 200KHz 915MHz 935MHz

TS7 ARFCN

25MHz 124 frames

downlink

960MHz

outline 1. Introduction 2. Architecture of GSM 3. Features of GSM 4. Services of GSM 5. GSM Radio subsystem 6. Call processing in GSM

Call processing in GSM The typical signaling sequences for call flow in GSM are as follows:  Mobile call origination.  Mobile call termination.  Authentication.  Inter-MSC call handoff.

The mobile call origination and the mobile call termination features are discussed:1.Mobile call origination procedure: Telephone 5

LE 6 1 BTS

MSC

BSC

7 1

3

1

7 MS

GMSC 7

7 2

2 VLR

7

4

2. Mobile Call Termination Procedure: PSTN

Telephone

12 LE 1 Paging Area

2 11

BTS BTS

BTS 10 11

12

11 MSC

BSC

BTS 10

12

GMSC 7

10 8

9

6

3 4

MS

VLR

HLR

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