
Introduction to Wireless Local Loop, Second Edition
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Content
- Intro
- Contents v
- Preface xvii
- Acknowledgments xix
- 1 Introduction 3
- 1.1 What is wireless local loop? 3
- 1.2 Why a book on wireless local loop? 5
- 1.3 Acronyms and terminology 6
- 1.4 How to read this book 7
- 2 The converging world of telephony, TV, and computers 9
- 2.1 A very confused global marketplace 9
- 2.2 Telecommunications 11
- 2.3 Broadcasting 13
- 2.4 Computing 15
- 2.5 The impact of IP on convergence 16
- 2.6 The new competing environment 17
- 2.7 Predicting what the user will require 19
- Reference 22
- 3 Access technologies 23
- 3.1 Access 23
- 3.2 Access via twisted pair 25
- 3.3 Access via coax 32
- 3.4 Access via TV broadcast 34
- 3.5 Access via mobile radio 35
- 3.6 Access via WLL 37
- 3.7 Access via power-line technology 39
- 3.8 Summary of access technologies 39
- References 40
- 4 Telecommunications environments worldwide 45
- 4.1 The world telecommunications environment 45
- 4.2 Developing countries 47
- 4.3 Eastern Europe 50
- 4.4 First World countries 53
- 4.5 History of WLL 60
- 4.6 The business of subsidization 64
- Reference 65
- 5 The economics of wireless versus fixed 67
- 5.1 The economics of telecommunications systems 67
- 5.2 The cost of wired systems 68
- 5.3 The cost of wireless systems 71
- 5.4 Hybrid systems 74
- 5.5 Market forecasts 75
- Reference 79
- 6 Wireless local loop markets 81
- 6.1 Introduction 81
- 6.2 What went wrong? 82
- 6.3 How the market will change in the future 84
- 7 Radio propagation 89
- 7.1 Introduction 89
- 7.2 The line-of-sight channel 94
- 7.3 Time variation in channels 98
- 7.4 Wideband channels 100
- 7.5 Frequencies for WLL 101
- 7.6 Predicting WLL coverage 103
- References 105
- 8 Radio systems 107
- 8.1 Speech coding 107
- 8.2 Error-correction coding and interleaving 112
- 8.3 Ciphering 116
- 8.4 Modulation 117
- 8.5 Multiple access 118
- 8.6 The use of spreading codes in a CDMA system 128
- 8.7 Orthogonal frequency division multiplexing 134
- 8.8 Packet and circuit switching 138
- 8.9 Time division duplex transmission 139
- References 140
- 9 TDMA or CDMA? 141
- 9.1 Introduction to the debate 141
- 9.2 Capacity comparison 142
- 9.3 Comparison of other factors 146
- 9.4 Summary 151
- Reference 152
- 10 Overview of technologies 155
- 10.1 Introduction 155
- 10.2 Standardization activities 158
- 10.3 Segmenting the technologies 160
- 10.4 Matching the technology to the requirement 161
- 10.5 The important information 162
- 11 The cordless technologies 165
- 11.1 Introduction 165
- 11.2 DECT 167
- 11.3 PHS 172
- 11.4 CT-2 173
- 11.5 Summary of cordless systems 174
- References 177
- 12 The cellular technologies 179
- 12.1 Introduction 179
- 12.2 Analog cellular 180
- 12.3 Digital cellular 181
- 12.4 Future cellular systems 186
- 12.5 Summary of cellular systems 190
- Reference 191
- 13 The proprietary technologies 193
- 13.1 Introduction 193
- 13.2 The TDMA technologies 194
- 13.3 The CDMA technologies 196
- 13.4 Other technologies 201
- 13.5 Summary 202
- 14 The broadband technologies 205
- 14.1 Introduction 205
- 14.2 Can WLL provide broadband services? 210
- 14.3 MMDS 219
- 14.4 LMDS 222
- 14.5 MVDS and other TV distribution systems 226
- 14.6 Wireless LAN systems 229
- 14.7 HiperAccess 230
- 14.8 Broadband proprietary products 231
- 14.9 Mesh networks 233
- References 236
- 15 Choosing the right technology 239
- 15.1 Introduction 239
- 15.2 Capacity comparison 240
- 15.3 Cost comparison 241
- 15.4 Functionality comparison 242
- 15.5 Summary 242
- 16 Looking at a technology in detail: cdmaOne 247
- 16.1 Introduction 247
- 16.2 System architecture 247
- 16.3 PSTN to WAM interconnection 249
- 16.4 Wireless access manager 252
- 16.5 Base stations 253
- 16.6 Fixed wireless terminal 254
- 17 Getting a license 261
- 17.1 Spotting the opportunity 261
- 17.2 Writing the license application 266
- 17.3 Radio spectrum for WLL 267
- 17.4 Radio spectrum issues 274
- References 289
- 18 Choosing a service offering 291
- 18.1 Introduction 291
- 18.2 Possible components of the service offering 292
- 18.3 Mobility in the local loop 298
- Reference 303
- 19 Developing the business case 305
- 19.1 The overall structure of the business case 305
- 19.2 The network build costs 307
- 19.3 The ongoing costs 311
- 19.4 Predicting revenue 313
- 19.5 Financing arrangements 317
- 19.6 Summary financial statistics 319
- 19.7 Tariffing policies 322
- 19.8 Analyzing the business case 323
- Reference 326
- 20 Rolling out the network 327
- 20.1 Introduction 327
- 20.2 Selecting the number of cells 329
- 20.3 Selecting the cell sites 333
- 20.4 Connecting the cells to the switch 337
- 20.5 Installing the subscriber units 345
- 20.6 Billing, customer care, and related issues 346
- 20.7 Summary 346
- References 347
- 21 Case study 349
- 21.1 Introduction 349
- 21.2 Market demand forecast 349
- 21.3 System grade of service 353
- 21.4 Vendor selection 355
- 21.5 Radio spectrum requirements 355
- 21.6 Numbering requirements 358
- 21.7 Network build plan 359
- 21.8 Network configuration 359
- 21.9 Traffic matrix and routing 362
- 21.10 Summary 363
- 22 The future 365
- 22.1 Introduction 365
- 22.2 Technical advances in WLL 366
- 22.3 Technical advances in other access techniques 367
- 22.4 Changing user demand 369
- 22.5 The future for WLL 372
- List of acronyms and abbreviations 375
- About the author 383
- Index 385
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