Code Division Multiple Access (cdma): By Nitesh Kumar

Code Division Multiple Access (CDMA)

By Nitesh Kumar

3G CDMA Architecture

CDMA2000-1xEVDO System Architecture (Basic) • BTS: Base Station, which creates a single cell • BSC: Base Station Controller, which controls roaming and channel allocations amongst various BSTs and is also referred to as a Radio Network Controller (RNC). • MSC: Mobile Switching Center, which performs the telephony switching functions and is usually connected to an SS7 network. • PDSN: Packet Data Serving Node, maintains IP communications between all MNs and the Packet Data Network (PDN), which in this diagram is the Internet. Note: For simplicity, only the CDMA2000 architecture will be reviewed for this presentation SOURCE: CDMA Development Group (CDG) 3G CDMA Architecture

Comparative Network Speeds CDMA 1xEV/DO

2400

W-CDMA stationary W-CDMA moving

2000 384

CDMA 1xRTT

144

GPRS

114

CDMA

64

PDC-P

28.8

GSM/PDC

Theoretical data transmission speed kbps

9.6

Source: ITU.

New Phones Have MMS, WAP, Java (GSM) or BREW (CDMA) – 400 million plus in 2003