GPRS in Practice: A Companion to the Specifications

Peter McGuiggan9780470095072, 0470095075

Professionals quickly discover that, although the technical specifications for GPRS cover all parts of the engineering functions in detail and depth, they are lacking in one important feature; the conceptual framework within which the specifications sit – GPRS in Practice fills this gap. By beginning with an explanation of why GPRS is necessary and describing the core concept of GPRS operations, the TBF (Temporary Block Flow), a revision section then covers the GSM Air Interface with its Radio, Physical and Logical channels and this progressively leads to the GPRS logical channels – what they do and how they do it. The book then moves on to a brief introduction of the GPRS protocol stack which provides a launch pad for a detailed trip into all the layers of this stack, with detailed diagrams and explanations of each layer integrated into an overall understanding of how the GPRS service operates in practice. Provides descriptions of why procedures are specified and then clearly explains how the specifications work in practice Provides a layered view of the GPRS protocol and deals in detail with each layer separately Includes numerous acronyms and abbreviations accompanied by their full meaning An invaluable resource for Mobile network operators, Development and deployment engineers and Handset designers.

---

Table of contents :
Team DDU……Page 1
Contents……Page 10
Preface……Page 16
1.2 So why GPRS?……Page 18
1.3 Internet communication……Page 20
1.6 GPRS Internet addresses……Page 22
1.7 Portable IP……Page 24
1.8 The GPRS sub-network……Page 27
1.9 Abbreviations used in this chapter……Page 30
2.1 The radio channels (GSM 45.001)……Page 32
2.2 Physical channels (GSM 45.001)……Page 34
2.2.1 The characteristics of the GSM/GPRS physical channels (GSM 45.001)……Page 36
2.3.1 GSM logical channels……Page 37
2.3.3 GPRS logical channels which are used only in conjunction with PBCCH……Page 39
2.3.4 GPRS logical channels which are used in the absence of a PBCCH……Page 40
2.4 The BCCH radio carrier……Page 41
2.6 Abbreviations used in this chapter……Page 42
3 Air Interface Frame and Multiframe Structures (GSM 45.002, 43.064)……Page 44
3.1 The basic frame……Page 46
3.2 The GPRS 52-frame multiframe and logical channel structures……Page 47
3.3 The 52-frame multiframe uplink PRACH channel (GSM 45.002, 43.064)……Page 51
3.4 The GSM 51-frame multiframe logical channel structures (non-combined configuration)……Page 54
3.7 Using the 51- and 52-frame logical channels……Page 57
3.8 Abbreviations used in this chapter……Page 62
4.1.1 The radio link control/medium access control (RLC/MAC) block……Page 64
4.1.2 Introduction to the MAC function (GSSM 44.060 sections 5, 7, 8)……Page 68
4.1.3 Combining the components of a TBF into a complete TBF……Page 69
4.1.4 TBF arrow diagrams (GSM 44.060 sections 5, 7, 8, 9)……Page 72
4.2.1 Introduction: GPRS attach……Page 75
4.3 ‘Attach’ MAC procedures (ETSI 123.060 section 6)……Page 76
4.4 Packet data transfer – PDP context activation (ESTI 123.060 section 9)……Page 82
4.5 GPRS sub-network originated TBFs……Page 88
4.6 Alerting the mobile station for a DL TBF……Page 92
4.7 Abbreviations used in this chapter……Page 94
5.1 The protocol stack……Page 96
5.1.1 GPRS protocol layers – a brief description……Page 99
5.2.1 GPRS attach……Page 110
5.2.2 Mobile originated PDP context activation and TBF (ETSI 123.060 section 9)……Page 114
5.2.3 Paging and MT PDP transfer (GSM 44.060 section 6)……Page 117
5.3 Temporary block flow acknowledged……Page 118
5.4 Abbreviations used in this chapter……Page 122
6.2.1 Subscriber profile……Page 126
6.3 Mobile equipment multislot capabilities (GSM 45.002 Annexe B)……Page 128
6.4 Abbreviations used in this chapter……Page 136
7 Operations in the Physical Layers……Page 138
7.2 PLMN selection (GSM 43.002 section 3)……Page 139
7.3 Initial cell selection (GSM 43.022 section 4)……Page 141
7.4 GPRS cell reselection when the GPRS sub-network is using PBCCH (GSM 45.008 section 10)……Page 145
7.4.2 GPRS cell reselection parameters (GSM 45.008 section 10)……Page 147
7.4.3 GPRS cell reselection criteria (GSM 45.008 section 10)……Page 151
7.4.4 GPRS cell reselection when the GPRS sub-network is not using PBCCH (GSM circuit switched cell reselection) (GSM 45.002 section 6)……Page 155
7.5 Discontinuous reception (DRX) and paging in a cell with PBCCH……Page 160
7.5.2 Determining the paging group (GSM 45.002 section 6)……Page 161
7.5.4 Selection of paging group from CCCHs when there is no PBCCH in a cell……Page 165
7.5.6 Network mode of operation (NMO) and paging (GSM 44.060 section 6)……Page 171
7.6 Neighbour cell measurements……Page 177
7.6.1 Measurements for cell reselection (GSM 45.008 section 6)……Page 179
7.6.2 Extended measurements (GSM 45.008 section 10)……Page 181
7.6.3 Interference measurements……Page 183
7.6.5 NC measurement reporting procedures……Page 184
7.6.7 Interference reports……Page 187
7.7 Mobile station transmitter power control (GSM 45.008 section 10)……Page 188
7.8 Timing advance (TA) (GSM 43.064 section 6)……Page 190
7.9 PRACH control parameters……Page 193
7.10 Contention resolution (GSM 43.064 section 6)……Page 199
7.10.1 One-phase access contention resolution……Page 200
7.10.2 Two-phase access contention resolution……Page 202
7.11 Channel encoding (GSM 45.003 and 43.064)……Page 203
7.12 Frequency hopping……Page 207
7.12.1 Rayleigh fading……Page 208
7.12.3 Interference spreading……Page 210
7.12.4 Frequency hopping……Page 212
7.13 Abbreviations used in this chapter……Page 224
8 RLC/MAC Layer Procedures (GSM 44.060)……Page 228
8.2 RLC procedures……Page 229
8.2.1 Segmenting LLC PDUs into RLC data blocks (GSM 44.060 section 9)……Page 234
8.3.1 RLC data block (uplink) parameters……Page 237
8.3.2 RLC/MAC parameters in action……Page 242
8.3.3 RLC control block (downlink) parameters……Page 246
8.5 RLC/MAC timers and counters (GSM 44.060 section 13)……Page 252
8.5.1 Mobile station side RLC/MAC counters and timers……Page 253
8.6 Abbreviations used in this chapter……Page 261
9 LLC Layer Procedures (GSM 44.064)……Page 264
9.1 Function of the LLC layer……Page 265
9.2.1 Types of information/supervisory frame……Page 269
9.2.4 Flags and registers used for frame address fields……Page 271
9.3 LLC operational parameters……Page 272
9.4.1 Normal (successful) ABM establishment……Page 273
9.5 Information/supervisory (IS) frame transfer……Page 278
9.5.1 IS frame transfer……Page 279
9.6 Abbreviations used in this chapter……Page 280
10 GMM Layer Procedures (GSM 23.060 section 6 and 44.008 sections 4 & 9)……Page 282
10.1 GMM states (GSM 23.060 section 6)……Page 284
10.2 GMM procedure attach (GSM 23.060 section 6)……Page 286
10.2.1 Attach request primitives……Page 290
10.2.3 Attach complete……Page 291
10.4.1 Normal routing area update……Page 292
10.5 Cell update……Page 296
10.7 Authentication and encryption procedures……Page 298
10.9.1 Mobile originated detach……Page 303
10.9.2 GPRS sub-network originated detach……Page 304
10.10 GPRS roaming……Page 305
10.11 Abbreviations used in this chapter……Page 306
11 SM Layer Procedures (24.008 section 6)……Page 308
11.1 PDP context activation by the mobile station……Page 312
11.3 PDP context modification……Page 318
11.4 PDP context deactivation by the mobile station……Page 319
11.6.1 QoS……Page 322
11.6.2 Radio priority……Page 324
11.7 Abbreviations used in this chapter……Page 325
12 SNDCP Procedures (GSM 44.065)……Page 328
12.1 SNDCP operation overview……Page 330
12.2 Buffering, segmentation and acknowledged mode transmission of network PDUs……Page 331
12.2.1 SN PDU headers……Page 333
12.3 Acknowledged mode description of operation……Page 334
12.4.1 The unacknowledged SN-DATA PDU……Page 336
12.5 Unacknowledged mode description of operation……Page 337
12.6 Management of multiple PDP contexts……Page 339
12.7 Abbreviations used in this chapter……Page 341
A1.1 MSK……Page 344
A1.3 EDGE – EGPRS……Page 346
A1.4 Abbreviations used in this appendix……Page 348
AS=appendix system information AP=appendix packet system information A2.1 Key……Page 350
AS.13 SI13 messages on BCCH or extended BCCH……Page 352
AP.1 PSI1 messages on the PBCCH……Page 356
AP.2 PSI2 messages on the PBCCH……Page 359
AP.3 PSI3 messages on the PBCCH……Page 361
AP.5 PSI5 messages on the PBCCH……Page 364
A2.2 Abbreviations used in this appendix……Page 366
A3.2 The interface user to SM – SMREG-SAP and primitives……Page 368
A3.3 The interface user to SNDCP – the SN-SAP and primitives……Page 369
A3.5 The interface SNDCP to LLC – the QoS-SAP and primitives……Page 371
A3.7 The interface GMM to LLC – the LLGMM-SAP and primitives……Page 373
A3.8 The interface GMM to RR (RLC/MAC) – the GMMRR-SAP and primitives……Page 378
A3.10 Abbreviations used in this appendix……Page 380
A4.1 Packet idle mode……Page 382
A4.2 Packet transfer mode……Page 384
A4.3 Abbreviations used in this appendix……Page 385
Appendix 5: A Possible Problem with UL TBFs When the Application Layer is Using TCP/IP……Page 386
A5.1 Abbreviations used in this appendix……Page 388
Recommended Reading……Page 390
Index……Page 392