Wireless Lan Standards and Applications

If you're an engineer involved in developing wireless LAN systems, this valuable book will give you a practical understanding of the latest wireless LAN standards and their implementation. The book clearly explains the two principal standards, IEEE 802.11 and IrDA, plus the HIPERLAN standard, and explores their real-world applications through commercially available equipment. Specific scenarios explain how WLAN systems can be built and integrated with cabled systems.

Preface

xi

Acknowledgments

xi

Introduction

1

(8)

Introduction to wireless local area networks (LANs)

1

(1)

The need for standardization

2

(1)

Future trends

3

(6)

References

7

(1)

Selected Bibliography

8

(1)

The IrDA Standard

9

(36)

Introduction to the IrDA --- General description

9

(4)

The standard protocol stack

9

(4)

Physical layer (SIR)

13

(9)

General description of the physical layer specification

13

(1)

Specifications for signals at bit rates from 2.4 Kbps to 115.2 Kbps

14

(1)

Specifications for signals at bit rates of 0.576 Mbps and 1.152 Mbps

15

(2)

Specifications for signals at bit rates of 4 Mbps

17

(4)

Optical interface characteristics

21

(1)

Serial infrared link access protocol (IrLAP)

22

(6)

Services provided by IrLAP: Connectionless services

24

(1)

Services provided by IrLAP: Connection-oriented services

24

(1)

Configurations and operating characteristics

25

(1)

IrLAP frame structure

26

(1)

IrLAP frame types

26

(2)

IRDA link management protocol (IrLAP)

28

(7)

Link management multiplexor (LM-MUX)

28

(5)

Information access services (IAS)

33

(2)

IRDA transport protocol: TinyTP

35

(3)

TinyTP frames format

36

(1)

Flow control

36

(2)

LAN access extensions for link management protocol: IrLAN

38

(7)

IrLAN general description

38

(1)

Access methods

39

(2)

Frames size and format

41

(2)

References

43

(2)

The IEEE 802.11 Standard

45

(64)

Introduction to IEEE 802.11: General description

45

(2)

Medium access control (MAC) for the IEEE 802.11 wireless LANs (WLANs)

47

(22)

Expected features of a WLAN MAC protocol

48

(6)

The structure of the IEEE standard MAC protocol

54

(11)

Comparison with the MAC protocol of other WLANs: Hiperlan

65

(4)

Conclusions

69

(1)

Physical layer for IEEE 802.11 wireless LANs: Radio systems

69

(27)

Introduction

69

(2)

Spread spectrum techniques

71

(1)

Frequency hopping techniques

72

(3)

Direct sequence systems

75

(8)

IEEE 802.11 frequency hopping physical layer

83

(6)

IEEE 802.11 direct sequence physical layer

89

(4)

Comparison of the FHSS and DSSS physical layers

93

(3)

Physical layer for IEEE 802.11 wireless LANS: Infrared systems

96

(8)

Description

96

(1)

The physical layer convergence procedure (IR-PLCP)

97

(2)

The IR physical medium sublayer (IR-PMD)

99

(5)

Conclusions and applications

104

(5)

References

105

(4)

The Hiperlan Standard

109

(42)

Introduction: Terminology

109

(4)

Physical layer (PHY)

113

(8)

Introduction

113

(1)

Transmission characteristics

114

(2)

Data bursts

116

(2)

Channel access bursts

118

(1)

Receiver characteristics

118

(1)

Compatibility between transmitter and receiver classes

119

(1)

Establishing a defer threshold

119

(2)

Hiperlan channel access control (CAC)

121

(10)

Generalities

121

(1)

Hiperlan CAC protocol data units (HCPDUs)

122

(2)

Channel access

124

(2)

Channel access in the free channel condition

126

(1)

Channel access in the synchronized channel condition

127

(3)

Hidden node detection and operation

130

(1)

Hiperlan medium access control (MAC)

131

(15)

Hiperlan Mac functions

131

(1)

Hiperlan differentiation and addressing

132

(1)

Data encryption

133

(1)

Power-saving function

133

(2)

MAC information databases

135

(2)

Priorities and traffic lifetime

137

(2)

Types of HMPDUs

139

(1)

Look-up function: LR-HMPDU and LC-HMPDU

139

(1)

IP-HMPDU and GP-HMPDU

140

(1)

DT-HMPDU

140

(1)

TC-HMPDU and HO-HMPDU

141

(1)

Routing functions and information maintenance

142

(4)

Conclusions on HIPERLAN type 1

146

(1)

Future BRAN standards

147

(4)

References

148

(1)

Selected Bibliography

149

(2)

Application Scenarios

151

(32)

Introduction

151

(1)

The Application scenarios

152

(9)

Public buildings

152

(6)

Business environment

158

(1)

Domestic buildings (the home)

159

(1)

Industrial sector

160

(1)

Wireless LAN technologies and products

161

(15)

The RF market

161

(7)

The IR market

168

(8)

Conclusions

176

(7)

References

177

(1)

Selected Bibliography

177

(1)

Appendix 5A: IrDA membership

178

(5)

Upcoming Standard and Future Trends

183

(30)

Introduction: Is the future wireless?

183

(3)

The evolution of HIPERLAN

186

(2)

The evolution of IEEE 802.11

188

(2)

Forthcoming IR standards

190

(10)

IrDA new techniques

190

(5)

Interconnection for wireless networks

195

(2)

New techniques for diffuse links: Spread spectrum

197

(3)

Other RF standard: DECT, Bluetooth, WATM, HomeRF, etc.

200

(9)

Introduction

200

(1)

Digital enhanced cordless telecommunications (DECT)

201

(2)

Bluetooth

203

(3)

Wireless ATM

206

(1)

HomeRF

207

(2)

Conclusions

209

(4)

References

209

(4)

Glossary

213

(10)

About the Author

223

(2)

Index

225

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Wireless Lan Standards and Applications

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Table of Contents

Supplemental Materials

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