|
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)
|