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14.1 Chapter 14 Wireless LANs Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

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Presentation on theme: "14.1 Chapter 14 Wireless LANs Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display."— Presentation transcript:

1 14.1 Chapter 14 Wireless LANs Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

2 IEEE IEEE has defined the specifications for a wireless LAN, called IEEE , which covers the physical and data link layers. Architecture MAC Sublayer Physical Layer Topics discussed in this section:

3 14.3 A BSS without an AP is called an ad hoc network; a BSS with an AP is called an infrastructure network. Note

4 14.4 Figure 14.1 Basic service sets (BSSs)

5 14.5 Figure 14.2 Extended service sets (ESSs)

6 14.6 Figure 14.3 MAC layers in IEEE standard

7 14.7 Figure 14.4 CSMA/CA flowchart

8 14.8 Figure 14.5 CSMA/CA and NAV

9 14.9 Figure 14.6 Example of repetition interval

10 14.10 Figure 14.7 Frame format

11 14.11 Table 14.1 Subfields in FC field

12 14.12 Figure 14.8 Control frames

13 14.13 Table 14.2 Values of subfields in control frames

14 14.14 Table 14.3 Addresses

15 14.15 Figure 14.9 Addressing mechanisms

16 14.16 Figure Hidden station problem

17 14.17 The CTS frame in CSMA/CA handshake can prevent collision from a hidden station. Note

18 14.18 Figure Use of handshaking to prevent hidden station problem

19 14.19 Figure Exposed station problem

20 14.20 Figure Use of handshaking in exposed station problem

21 14.21 Table 14.4 Physical layers

22 14.22 Figure Industrial, scientific, and medical (ISM) band

23 14.23 Figure Physical layer of IEEE FHSS

24 14.24 Figure Physical layer of IEEE DSSS

25 14.25 Figure Physical layer of IEEE infrared

26 14.26 Figure Physical layer of IEEE b

27 BLUETOOTH Bluetooth is a wireless LAN technology designed to connect devices of different functions such as telephones, notebooks, computers, cameras, printers, coffee makers, and so on. A Bluetooth LAN is an ad hoc network, which means that the network is formed spontaneously. Architecture Bluetooth Layers Baseband Layer L2CAP Topics discussed in this section:

28 14.28 Figure Piconet

29 14.29 Figure Scatternet

30 14.30 Figure Bluetooth layers

31 14.31 Figure Single-secondary communication

32 14.32 Figure Multiple-secondary communication

33 14.33 Figure Frame format types

34 14.34 Figure L2CAP data packet format


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