This book explains how the GSM system has been modified to provide GPRS, EDGE, and EGPRS mobile packet data services to provide a maximum delivered packet data transmission rate of approximately 474 kbps.
Described are the physical and logical channels and their functions along with the capabilities and operation of the GPRS and EGPRS radio channel including asymmetric data rates, modulation types (GMSK, 8-PSK).
You will discover how GPRS systems can service more than 80 active users per GSM radio channel with up to 8 simultaneous data sessions in progress.