TECHNOLOGY GENERATIONS

1G WIRELESS TECHNOLOGY:

·        USING ANALOG SIGNALS

·        LISTEN TO HANDSET

·        FREQUENCY TYPICALLY 150 MHZ AND ABOVE

DRAWBACKS:

·        POOR VOICE QUALITY

·        POOR BATTERY LIFE

·        NO SECURITY

·        LARGE PHONE SIZE

·        FREQUENT CALL DROPS

·        LIMITED CAPACITY AND POOR HANDOFF RELIABILITY

2G WIRELESS TECHNOLOGY:

·        2G phones using global system for mobile communications(GSM) were first used in the early 1990 s in Europe.

·        GSM provides voice and limited data services and uses digital modulation for improved audio quality.

·         Digital AMPS , CDMA were some of the 2Gsystems.

FEATURES INCLUDES:

·        TEXT

·        SMS

·        FAX

·        2 DIMENSIONAL

DRAWBACKS:

·        Range of sound is very small

·        Weaker digital signal

2.5 WIRELESS TECHNOLOGY:

·        An interim stage that is taken between 2G and 3G that is 2.5G

·        Features includes:-

o   Phone calls/

o   Fax

o    Voice mail

o    Send/Receive e-mail messages

o    web browsing

o    camera phones

o    speed: 64-144 kb/sec

o    Time to download a 3 min MP3 song: 6-9 min

3G WIRELESS TECHNOLOGY:

·        To meet the growing demand in network capacity, rates required for high speed data transfer and multimedia applications, 3Gstandards started evolving.

·        It is based on the International Telecommunication Union (ITU) family of standards.

·        3G technologies enable network operators to offer users a wider range of more advanced services.

·        Services include wide-area wireless voice telephony, video-calls and broadband wireless data, all in a mobile environment.

·        The data are sent through the technology called Packet switching.

·        Voice calls are interpreted through circuit switching.

FEATURES:

·        Phone calls/ fax

·        Global roaming

·        Send/receive large email messages

·        High speed web

·        Navigation / maps

·        Video conferencing

·        TV streaming

·        Electronic agenda meeting reminder

·        Speed: 200 kb/sec-2mb/seC

·         Time to download a 3 min MP3 song:

·         11 sec-1.5 min

ADVANTAGES

MUSIC!!:

·        You can access to downloadable music, with no cables or PC.

GAMING TO THE NEXT LEVEL:

·        3G technology has taken the gaming to the next level.

·        Real-time multiplayer gaming is possible in 3G system.

·         Innovative new services are being added by developer daily.