1Moe Rahnema. “Overview of The GSM System and Protocol Architecture,” IEEE Communications Magazine, April 1993.
2Christian Bettstetter, Hans-JOrg VOgel, a ndJ?rg Ebersp?che TUM. “GSM Phase 2^+ General Packet Radio Service GPRS: A rchitecture, Protocols, And Air Interface,”I EEE Communications Surveys, Third Qua rter 1999. vol.2 no.3.
3Roger Kalden, Ingo Meirick, and Michael Meyer, Ericsson Research, Ericsson Eurola b Deutechland. "Wireless Intemet Access Based on GPRS," IEEE Personal Comm unications, April 2000.
4"Digital Cellular Telecommunications Syst era(Phase 2+); Abbreviations and Acrony ms," ETSI T1L 101 748 V8.0.0 (2000-0 5).
5"UMA Architecture(Stage 2) R1.0.4(2005 - 5- 2) Technical Specification," 2004- 20 05, Alcatel, BT PLC, Cingular Wireless L LC, Ericsson AB, Kineto Wireless Inc., Mo torola, Inc., Nokia, Nortel, 02, Research In Motion Limited, Rogers Wireless Inc., S iemens AG, Sony Ericsson, T-Mobile US A.
