GPRS: Gateway to Third Generation Mobile Networks -- Contents vii -- Preface xiii -- References xvi -- 1 The Basics: Principles of GSM and Influences on GPRS 1 -- 1.1 The Network Architecture of GSM 1 -- 1.2 The Mulitple Access Processes: SDMA, FDMA, and TDMA 10 -- 1.3 Chronological Sequence of Uplink and Downlink Transmission 13 -- 1.4 Problems of Transmission Delay in TDMA Systems--Timing Advance Control 14 -- 1.5 Frame Hierachy and Logical Channels in GSM 17 -- 1.6 The GSM Signal Processing Chain 23 -- 1.7 Data Services in GSM 42 -- References 47 -- 2 Introduction to GPRS 49 -- 2.1 The History--From GSM to UMTS 49 -- 2.2 Definitions: Circuit Switched and Packet Switched 55 -- 2.3 Problems of Packet Switching in Mobile Communication 61 -- 2.4 The Combined GSM/GPRS Network Architecture 70 -- 2.5 The Mobile Station in GPRS 83 -- References 88 -- 3 The Air Interface in GPRS 89 -- 3.1 The 52 Multiframe 89 -- 3.2 The Packet Data Channel 92 -- 3.3 Timing Advance Control in GPRS 101 -- 3.4 The Coding Schemes CS-1 to CS-4 106 -- 3.5 Identification of Data Packets 116 -- 3.6 Access to the GPRS Network 119 -- 3.7 Resource Allocation in GPRS 125 -- 3.8 The Operation of the PACCH in Uplink and Downlink Direction 135 -- 3.9 The Termination of a TBF--Release of Resouces 137 -- 4 QoS, Mobility, and Session Mangement in GPRS 143 -- 4.1 GPRS Mobility Management 143 -- 4.2 QoS in GPRS 169 -- 4.3 Session Mangement in GPRS 175 -- 5 The GPRS Protocol Stack 187 -- 5.1 The RLC/MAC Protocol 189 -- 5.2 The LLC Protocol 203 -- 6 Introduction to HSCSD 211 -- 6.1 Overview 211 -- 6.2 The Essential Innovations in HSCSD 215 -- 6.3 Connection Chain Using Nontransparent/Asymmetrical Data Service as an Example 232 -- 6.4 Selected Details 238 -- References 283 -- List of Acronyms 285 -- About the Authors 293 -- Index 295.