Featuring developing technologies, updated market forecasts, and current regulatory initiatives, this text aims to keep the reader at the forefront of emerging products, services and issues affecting the field of wireless local loop (WLL) technology. The second edition includes new chapters on WLL deployment, the WLL market, and a substantial review of broadband technologies, as well as new sections on prediction of user requirements and the emerging UMTS standard.
Author(s): William Webb
Edition: 2 Sub
Year: 2000
Language: English
Pages: 403
Contents v......Page 4
Preface xvii......Page 16
Acknowledgments xix......Page 18
1.1 What is wireless local loop? 3......Page 21
1.2 Why a book on wireless local loop? 5......Page 23
1.3 Acronyms and terminology 6......Page 24
1.4 How to read this book 7......Page 25
2.1 A very confused global marketplace 9......Page 27
2.2 Telecommunications 11......Page 29
2.3 Broadcasting 13......Page 31
2.4 Computing 15......Page 33
2.5 The impact of IP on convergence 16......Page 34
2.6 The new competing environment 17......Page 35
2.7 Predicting what the user will require 19......Page 37
Reference 22......Page 40
3.1 Access 23......Page 41
3.2 Access via twisted pair 25......Page 43
3.3 Access via coax 32......Page 50
3.4 Access via TV broadcast 34......Page 52
3.5 Access via mobile radio 35......Page 53
3.6 Access via WLL 37......Page 55
3.8 Summary of access technologies 39......Page 57
References 40......Page 58
4.1 The world telecommunications environment 45......Page 63
4.2 Developing countries 47......Page 65
4.3 Eastern Europe 50......Page 68
4.4 First World countries 53......Page 71
4.5 History of WLL 60......Page 78
4.6 The business of subsidization 64......Page 82
Reference 65......Page 83
5.1 The economics of telecommunications systems 67......Page 84
5.2 The cost of wired systems 68......Page 85
5.3 The cost of wireless systems 71......Page 88
5.4 Hybrid systems 74......Page 91
5.5 Market forecasts 75......Page 92
Reference 79......Page 96
6.1 Introduction 81......Page 97
6.2 What went wrong? 82......Page 98
6.3 How the market will change in the future 84......Page 100
7.1 Introduction 89......Page 107
7.2 The line-of-sight channel 94......Page 112
7.3 Time variation in channels 98......Page 116
7.4 Wideband channels 100......Page 118
7.5 Frequencies for WLL 101......Page 119
7.6 Predicting WLL coverage 103......Page 121
References 105......Page 123
8.1 Speech coding 107......Page 125
8.2 Error-correction coding and interleaving 112......Page 130
8.3 Ciphering 116......Page 134
8.4 Modulation 117......Page 135
8.5 Multiple access 118......Page 136
8.6 The use of spreading codes in a CDMA system 128......Page 146
8.7 Orthogonal frequency division multiplexing 134......Page 152
8.8 Packet and circuit switching 138......Page 156
8.9 Time division duplex transmission 139......Page 157
References 140......Page 158
9.1 Introduction to the debate 141......Page 159
9.2 Capacity comparison 142......Page 160
9.3 Comparison of other factors 146......Page 164
9.4 Summary 151......Page 169
Reference 152......Page 170
10.1 Introduction 155......Page 173
10.2 Standardization activities 158......Page 176
10.3 Segmenting the technologies 160......Page 178
10.4 Matching the technology to the requirement 161......Page 179
10.5 The important information 162......Page 180
11.1 Introduction 165......Page 183
11.2 DECT 167......Page 185
11.3 PHS 172......Page 190
11.4 CT-2 173......Page 191
11.5 Summary of cordless systems 174......Page 192
References 177......Page 195
12.1 Introduction 179......Page 197
12.2 Analog cellular 180......Page 198
12.3 Digital cellular 181......Page 199
12.4 Future cellular systems 186......Page 204
12.5 Summary of cellular systems 190......Page 208
Reference 191......Page 209
13.1 Introduction 193......Page 211
13.2 The TDMA technologies 194......Page 212
13.3 The CDMA technologies 196......Page 214
13.4 Other technologies 201......Page 219
13.5 Summary 202......Page 220
14.1 Introduction 205......Page 223
14.2 Can WLL provide broadband services? 210......Page 228
14.3 MMDS 219......Page 237
14.4 LMDS 222......Page 240
14.5 MVDS and other TV distribution systems 226......Page 244
14.6 Wireless LAN systems 229......Page 247
14.7 HiperAccess 230......Page 248
14.8 Broadband proprietary products 231......Page 249
14.9 Mesh networks 233......Page 251
References 236......Page 254
15.1 Introduction 239......Page 257
15.2 Capacity comparison 240......Page 258
15.3 Cost comparison 241......Page 259
15.5 Summary 242......Page 260
16.2 System architecture 247......Page 265
16.3 PSTN to WAM interconnection 249......Page 267
16.4 Wireless access manager 252......Page 270
16.5 Base stations 253......Page 271
16.6 Fixed wireless terminal 254......Page 272
17.1 Spotting the opportunity 261......Page 279
17.2 Writing the license application 266......Page 284
17.3 Radio spectrum for WLL 267......Page 285
17.4 Radio spectrum issues 274......Page 292
References 289......Page 307
18.1 Introduction 291......Page 309
18.2 Possible components of the service offering 292......Page 310
18.3 Mobility in the local loop 298......Page 316
Reference 303......Page 321
19.1 The overall structure of the business case 305......Page 323
19.2 The network build costs 307......Page 325
19.3 The ongoing costs 311......Page 329
19.4 Predicting revenue 313......Page 331
19.5 Financing arrangements 317......Page 335
19.6 Summary financial statistics 319......Page 337
19.7 Tariffing policies 322......Page 340
19.8 Analyzing the business case 323......Page 341
Reference 326......Page 344
20.1 Introduction 327......Page 345
20.2 Selecting the number of cells 329......Page 347
20.3 Selecting the cell sites 333......Page 351
20.4 Connecting the cells to the switch 337......Page 355
20.5 Installing the subscriber units 345......Page 363
20.7 Summary 346......Page 364
References 347......Page 365
21.2 Market demand forecast 349......Page 367
21.3 System grade of service 353......Page 371
21.5 Radio spectrum requirements 355......Page 373
21.6 Numbering requirements 358......Page 376
21.8 Network configuration 359......Page 377
21.9 Traffic matrix and routing 362......Page 380
21.10 Summary 363......Page 381
22.1 Introduction 365......Page 383
22.2 Technical advances in WLL 366......Page 384
22.3 Technical advances in other access techniques 367......Page 385
22.4 Changing user demand 369......Page 387
22.5 The future for WLL 372......Page 390
List of acronyms and abbreviations 375......Page 393
About the author 383......Page 401
Index 385......Page 403
