无线数据传输网络：蓝牙、WAP和WLAN

List of Tables and Figures

Preface

About the Author

About the Reviewers

About the Contributors

Chapter 1　Welcome to the Revolution　1

* Evolving Wireless Applications　2

·Personal Positioning　3

·Vehicle Positioning　4

·Meter Reading　5

·Mobile Banking and Finance　5

·Brick and Mortar Shopping　6

·Email　7

·Wireless Docking　7

·Web Surfing　8

·LAN Access and Mobility Ports　8

* Book Preview　8

·Communications Basics　9

·AMPS　9

·D-AMPS　9

·GSM　10

·CDMA　10

·The WAP Suite　10

·LMDS　11

·MMDS　11

·Bluetooth　11

·Wireless LANS　12

Chapter 2　Communications Basics　13

* Powets of 10　14

* Frequency　15* Wavelength　16

* The Frequency Spectrum　17

* Bandwidth　18

* Power Measurements　18

·Bel　19

·Decibel　20

·Decibel above 1 mW　20

* Signal-to-Noise Ratio　21

* Propagation Loss　23

* Transmission Rate Constraints　24

·Nyquist Relationship　25

·Shannon's Law　27

* Radiofrequency Spectrum Allocation　28

·U.S.Spectrum Allocation　28

·Band Nomenclature　29

·Applications　31

Chapter 3　AMPS　33

* Evolution　34

* Components　36

·Component Relationship　36

* Network Access　37

* Frequency Utilization　37

·Frequency Allocation　38

·Channel Center Frequencies　41

·Channel Utilization　41

* Signaling　51

·Voice-Channel Signaling　52

·Cochannel Interference　53

* Data over AMPS　54

·Case Study and Lessons Learned　54

·Operating Rates　56

·Cellular-Ready Modem Protocols　56

Chapter 4　D-AMPS　63

* Overview　64

* TDMA　65

·Advantages　67

·Disadvantages　67

* Digital Radio　67

* Voice-Coding Methods　68

·Channel Banks　68

·PCM　68

·TDM and Line Driver　70

·Waveform Coding　70

·Voice Coding　70

·Hybrid Coding　71

* Modulation　72

* Baud Rate　72

* TDM Operation　73

·Frames　73

·Time-Slot Format　75

·Digital Channel Traffic Signaling　77

·Control Channel Operations　78

* The IS-136 Digital Control Channel　78

·PCS Overview　79

·Extended Battery Life　80

·Frequency Utilization　81

·Logical Channels　81

·Superframes and Hyperframes　84

* The PCSLayered Model　84

* PCS Messaging　86

* Modem Operations　86

Chapter 5　GSM　87

* Evolution　88

* Frequency Allocation　88

* Governing Body　89

* GSM Services　89

·Voice Transport　90

·Data Services　90

·Bearer Services　91

·Teleservices　91

·Supplementary Services　92

·The Subscriber ldentity Module　93

* Frequency Allocation　94

·Initial European GSM　94

·United Kingdom GSM　95

·PCS 1900　96

* TDMA Operations　97

·Time -Slot Utilization　98

* Speech Coding　98

* Framing and Channel Organization　99

·The GSM Multiframe　99

* Data over GSM　103

·Modem Incompatibility　103

·Adapter Use　103

* Information Transfer Modes　104

* Inbound Data/Fax　104

* Data Compression　105

* Short Message Service　105

·Features　106

·Utilization　108

·SMS Centers　109

·Using the Internet　109

Chapter 6　CDMA　113

* Evolution　114

·CITA Requirements　114

·Deployments　115

·IS-95　115

* Overview　115

·Comparison With AMPS and TDMA　116

·Capacity　118

·Frequency Allocation　118

·Speech Coding　122

* Channel Structure　124

·Downlink Channels　124

·Uplink Channels　129

* CDMA Data Services　131

·The CDMA Air-Interface Protocol Stack　131

·SMS　137

* 3G-CDMA　138

·UMTS/IMT-2000　138

·CDMA2000　139

Chapter 7　The WAP Protocol Suite　143

* Overview　144

·Evolution　144

·Basic Components　145

·Architecture　146

* Wireless Datagram Protocol　152

·Port Number Use　152

·The Adaptation Layer　154

·Protocol Operation　154

* Wireless Transport Layer Security　158

·Connection Management　159

·Encryption Support　159

* The Wireless Application Environment　162

·Components　163

·The Wireless Markup Language　163

Chapter 8　Local Multipoint Distribution Service　175

* Overview　176

* Frequency Allocation　177

·Frequency Blocks　177

·Frequency Bands　178

·Bandwidth and Capacity　178

* Architecture　180

·Frequency Considerations　180

·The LMDS Cell　180

·Base Station　182

·The Network Interface Unit　183

·Access Methods　184

·Modulation　186

* System Capacity　188

·FDMA　188

·TDMA　190

·Increasing Cell Capacity　190

* LMDS Advantages　191* LMDS Disadvantages　191

Chapter 9　Multichannel Multipoint Distribution System　193

* Overview　194

·Frequency Band　195

·Potential Market　195

·Basic Architecture　195

·Advantages of Use　196

·Potential Disadvantages　196

* Evolution　196

·MDS　197

·MMDS　197

* Frequency Assignments　199

* Transmission Methods　202

·Multipath Communications　202

·Minimizing Multipath Reflections　203

* Summary　207

Chapter 10　Bluetooth　209

* Rationale　210

·Compatibility Problems　210

·Bluetooth to the Rescue　211

·Potential Utilization　211* Evolution　213

·The Code Name　213

* Overview　214

* Comparison with Infrared(IR)　215

* System Architecture　215

·Master-Slave Relationship　216

·Power Requirements　216

·Power Operating Modes　217

·Interface Support　218

·The Protocol Stack　218

·Adopted Protocols　221

* Communications Channels　221

·Networking　222

Chapter 11　Wireless LSNs　229

* General Characteristics　230

·Spread Spectrum Technology　230

* Applications　238

·Inventory Control　238

·Hospital　238

·Hotel　239

·Training　239

·Trade Shows　239

·Wireless Rationale　240

* The IEEE 802.11 Wireless LAN Standard　240

·Initial Effort　240

·Basic Configuration　241

* Frequency Selection　241

* Environment　242

* Architecture　242

·Operation　261

* Wireless Home Networking　265

·Overview　265

·System Requirements　265

·Technical Characteristics　266

·Appendix A　271

·Appendix B　291

·Appendix C　309

·Glossary　321

Index　331