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4G - > Difference between 3G and 4G?

Major requirement 

driving architecture 

3G 

(Including 2.5G, Sub3G)

4G

 

Predominantly voice driven; 

data was always add on 

Converged data and voice over IP

Network Architecture 

Wide area cell-based 

Hybrid: Integration of wireless LAN 

(WiFi, Bluetooth) and wide area

Speeds

384 Kbps to 2 Mbps 

20 to 100 Mbps in mobile mode 

Frequency Band 

Dependent on country or continent (1800‐2400 MHz) 

Higher frequency bands (2-8 GHz) 

Bandwidth 

5-20 MHz 

100 MHz (or more) 

Switching Design Basis 

Circuit and Packet 

All digital with packetized voice 

Access Technologies 

W-CDMA, 1xRTT, Edge 

OFDM and MC-CDMA 

(Multi Carrier CDMA) 

Forward Error Correction 

Convolutional rate 1/2, 1/3 

Concatenated coding scheme 

Component Design 

Optimized antenna design, 

multi-band adapters 

Smarter Antennas, software 

multiband and wideband radios 

IP  

A number of air link protocols, 

including IP 5.0  

All IP (IPv6) 

Differences between 3G and 4G

 


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