Wireless Network Elements & Data Evolution

I will try to explain an outline of the wireless network, basically the network element in wireless GSM / CDMA have the same subsystem, if theres any different only in functionallity per subs.
The first layer we can Radio Subsystem, containing some element:
Handset / Mobile Subscriber will send and receive the signal from BTS : Base Transceiver Station, his duty as transmitter & receiver signal radio to Mobile subscriber.
BSC : Base Station Controller , which is responsible to handling some of BTS’s
And the second layer usually recognize as Network Switching Subsystem
MSC : Mobile Switching Centre , as his name the main responsibilty to switching and routing.
HLR : Home Location Register, store data origin subscriber.
VLR : Visitor Location Register, store active subscriber, and mostly VLR already integrate with MSC.

On above data is main part of wireless network for basic services, but theres another sytem we must’nt forget because this system will support current services , like IN / Intelligent Network the function for charging to prepaid subscriber, and other Value Added Sevice subnetwork like SMSC / Short Message Service Centre to support sms service , MMSC / Multi Media Messaging Service Centre , IVR / Interactive Voice Response, VMS / Voice Mail System,
Specially data services I will highlight the evolution, the data service use by subscriber since 2nd generation like GSM, CDMA2000 1x , 2,5 Generation known like GPRS General Packet Radio Services & EDGE Enhance Data Rate for GSM Evolution and for CDMA domain there services named PDN Packet Data Network, finally broadband service up to 2 Mbps provided in 3rd generation : W-CDMA / UMTS Universal Mobile Telecommunications System and for CDMA platform using CDMA2000 1x EV-DO Evolution Data Only.