Introduction To Gsm: - Standards & Implementations

INTRODUCTION TO GSM - Standards & Implementations. GSM 900 DCS 1800 1900 450 800

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Philippine Representative

Evolution of GSM GSM Requirements ● ● ●

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Good subjective speech quality Encryption of user information Must operate in the entire 890 - 960 Mhz frequency band Spectral efficiency Support for international roaming Minimize modifications to the existing fixed publ networks Low handsets and service cost ISDN compatibility Support for range of new services and facilities

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Philippine Representative

Evolution of The GSM

★ 1982 : Group Special Mobile formed within CEPT History ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★

1986 : A permanent Nucleus formed 1987 : Radio transmission Techniques are chosen. Field trials completed 1987 : GSM becomes ETSI technical committee 1987 : 13 Operators sign a memorandum of understanding 1989 : Prototype ( validation ) systems are on the air 1990 : GSM Phase I specifications are finalized 1991 : UK, France, Germany and Italy introduce GSM services 1992 : Motorola cuts over the first commercial system built for COMVIQ on Sept 1 1994 : GSM Phase 2 specifications released 1996 : GSM Phase 2+ specs are now defined GSM Phase I specification document has 5230 pages !!! GSM Phase 2 GPRS EGPRS 3G

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Philippine Representative

Technology Evolution

•GSM

•AMPS

•GSM900

•TACS

•DCS1800

– HSCSD

•JTACS

•PCS1900

– GPRS

•NMT-450

•NADC

– EDGE

•NMT-900

•PDC

•IS-95 CDMA

•IS-95 CDMA

80s

90s

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Philippine Representative

– HSD

•EUROPE – W-CDMA [W-CDMA for FDD / TD-CDMA for TDD] •ASIA – ARIB W-CDMA •US – D-AMPS IS-136 – cdma2000

2000

GSM 2G+ • HSCSD - High Speed Circuit Switched Data – Multiple TDMA timeslots allocated for data transmission – Bandwidth on demand, up to 64kBit/s – Compatible with existing GSM network infrastructure

• GPRS - General Packet Radio Services – Radio resources shared by all users on thecell – Will handle14- >100kBit/s datarates – Compatiblewith existingGSM network infrastructure

• EDGE -EnhancedDaterates for GSMEvolution – Newmodulationformat for higher datarates Suggestions: DBCPM, BOQAM&QOQAM – Maintains 200kHz channel spacings +GSMTDMA framestructure – Will coexist withexistingGMSK services

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Philippine Representative

IMT-2000 / 3G+ (International Mobile Telecommunications -2000) • Wireless multimedia • Bandwidth on demand • Global coverage – Integration of satellite and terrestrial services

• Broad spectrum of usage – Multimedia communication ->stock status reporting by vending machines

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Philippine Representative