“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Local Area Networks

Gerd Keiser

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Chapter Eight

Wireless LANs

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Position of IEEE 802.11 within the ISO modelFigure 8.1

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Formation of a PLCP frame from a LLC PDUFigure 8.2

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Signals sent from wireless devices to a LAN access point Figure 8.3

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Example of a BSS and an ESSFigure 8.4

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Example of an ad hoc wireless LANFigure 8.5

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

IEEE 802.11 MAC architectureFigure 8.6

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Access method for the CSMA/CA protocolFigure 8.7

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

General IEEE 802.11 frame formatFigure 8.8

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Comparison of ISM spectral bands for wireless LANsFigure 8.9

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

The concept of the spread spectrum methodFigure 8.10

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Example of frequency hoppingFigure 8.11

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

11-chip Barker sequences and the XOR function in DSSSFigure 8.12

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Concept of a diffused-light infrared wireless LANFigure 8.13

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

IEEE-802.11 PLCP frame for infrared physical mediaFigure 8.14

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

IEEE 802.11b frame structuresFigure 8.15

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Multipath phenomenon in a wireless LANFigure 8.16

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

OFDM symbols with cyclic extensions at four frequenciesFigure 8.17

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Master/slave relationships for Bluetooth networksFigure 8.18

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Bluetooth packet format and its access code formatFigure 8.19

“Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl

Example of a wireless network in a home environmentFigure 8.20