WIRELESS GENERATION EVOLUTION
1G
从1980至1990
frequency: 150MHz/900MHz
bandwidth: Analog telecomunication
Characteristics : First wireless communication
Technology : Analog cellular
Capacity Data Rate : 2kbps
Bad voice quality, poor battery, big cellphones
2G
从1990至2000
Allow text message service
Frequency : 1.8GHz (900MHz)
Characteristics : Digital
Technology : Digital cellular, GSM
Signal must be strong
Capacity data : 64kbps
2.5G
2G cellular technology with GPRS
E-mails
Web Browsing
Camera Phone
3G
从2000至2010
Frequency : 1.6 – 2.0 GHz
Capacity data rate : 144kbps-2 Mbps
Characteristics : digital broadband, increase speed
Technology : CDMA, UMTS, EDGE
Called smartphones
support location based services (service provider sends localised weather / send traffic conditions to phone)
support video conferencing
fast communication
video calls
4G
从2010至2020
Frequency : 2-8 GHz
Characteristics : High speed, all IP based protocols
Technology : LTE, Wi-FI
Bigger battery usage
Capacity Data Rate : 100Mbps – 1Gbps
Mobile multimedia, anytime anywhere can use, global mobile support, integrated wireless solution
5G
从2020至？
High speed and capacity
Faster data transmission
More efficients
Support : interactive multimedia, voice streaming, buckle up internet
Capacity data rate : 1Gbps - UNLIMITED
