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GSM Network Architecture. ELET 6302. Motivation. Outline. Introduction and history. GSM architecture. Implementation. Technology and standards. Summary. Introduction. Global System for Mobile Communication (GSM) Anybody – 500 million users (may 2001) Anywhere – 168 countries (may 2001)

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Presentation Transcript
outline
Outline
  • Introduction and history.
  • GSM architecture.
  • Implementation.
  • Technology and standards.
  • Summary
introduction
Introduction
  • Global System for Mobile Communication (GSM)
    • Anybody – 500 million users (may 2001)
    • Anywhere – 168 countries (may 2001)
    • Any media – voice, messaging, data, multimedia

Source: Hillebrand, 1

gsm architecture
GSM Architecture

Network Management Center

Home Location Register

BTS = Base Transceiver Station

AuC = Authentication Center

OMC = Operation and Maintenance Center

PSTN = Public Switched Telephone Network

ME = Mobile Equipment

AuC

Equipment ID

OMC

Visitor Location Register

Subscriber Identity Module

BTS

Mobile switching center

ME

Data communication network

Subscriber Identity Module

Base station controller

BTS

ME

Subscriber Identity Module

BTS

ME

PSTN

Source: Stallings, 313

Source: Mehrotra, 27

gsm architecture6
GSM Architecture

MS Transmission Band : 890 – 915 MHZ

BS Transmission Band : 935 – 960 MHZ

45 MHz

sim subscriber identity module
SIM (Subscriber Identity Module)

Billions of Calls

Millions of Subscribers

Thousand of Different Types of Telephones

Hundreds of Countries

Dozens of Manufacturers….

And only one Card: The SIM

  • Administrative data
  • Security data
  • Subscriber data
  • Roaming data
  • PLMN (Public Land Mobile Network

Source: Hillebrand, 369

http://ucables.com/products/simcards/

implementation
Implementation

Receiver

>Channel Decoding

>De-Interleaving

>Re-formatting

Voice decoding

Deciphering

Demodulation

>Channel encoding

>Interleaving

>Burst generation

Voice encoding

Ciphering

Modulation

Amplifier

Transmitter

Central processor, clock and tone, internal bus system, keyboard (HMI)

SIM = Subscriber Identity Module

Source: Heine, 14

implementation9
Implementation

HF Transmitter (HF-TX)

Output filter

TRX

Abis-Interface

Transmission system

Slow frequency hopping

Digital signal processing (NF functionality)

HF Receiver (HF-RX)

Input filter

O&M Module

Operation and maintenance functionality/clock distribution

Block Diagram of a BTS with one TRX

Source: Heine, 20

gsm variants
GSM Variants

Source: Bekkers, 299

summary
Summary
  • Network architecture
  • Implementation
  • Voice application
  • Data application
references
References

Bekkers, Rudi. Mobile Communications Standards: GSM, UMTS, TETRA, and ERMES. Norwood, MA: Artech House, Inc., 2001.

Halonen, Romero, and Melero. GSM, GPRS, and EDGE Performance: Evolution Towards 3G/UMTS. England: John Wiley & Sons Ltd., 2003.

Hillebrand, Friedhelm. GSM and UMTS: The Creation of Global Mobile Communications. England: John Wiley & Sons Ltd., 2002.

Heine, Gunnar. GSM Networks: Protocols, Terminology, and Implementation. Norwood, MA: Artech House, Inc., 1999.

Mehrotra, Asha. GSM System Engineering. Norwood, MA: Artech House, Inc., 1997.

Harte, Levine, and Livingston. GSM Superphones. United States: APDG Publishing, Inc. A Division of McGraw-Hill, 1999.