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IEEE 802.11 Project

Contents:
Introduction
Architecture
MAC Sublayer
Distribution Coordination Function
Point Coordination Function
MAC Layer Frame
Physical Layer
IEEE 802.11 FHSS
IEEE 802.11 DSSS
IEEE 802.11 Infrared

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IEEE 802.11 Project

  1. 1. Hamdard University Bangladesh Hamdard Nagar, Gazaria, Munshiganj
  2. 2. Introduction Architecture MAC Sublayer Distribution Coordination Function Point Coordination Function MAC Layer Frame Physical Layer IEEE 802.11 FHSS IEEE 802.11 DSSS IEEE 802.11 Infrared 2/13
  3. 3. Introduction of IEEE 802.11 Released in 1997 Define the specification for wireless LAN. Covers physical and data-link layer. 3/13
  4. 4. Architecture Define two kinds of services. 4/13
  5. 5. MAC Sub-layer 5/13
  6. 6. Distribution Coordination Function If a station has MAC frame to transmit, it listens to the medium. If the medium is idle, station may transmit. Otherwise it must wait until current transmission is complete. 6/13 Source Destination
  7. 7. Point Coordination Function 7/13 Implemented in infrastructure network. Use repetition interval. Polled Station Others Repetition Interval Contention-free
  8. 8. MAC Layer Frame 8/13 frame control duration address 1 address 2 address 4 address 3 payload FCS 2 2 6 6 6 2 6 0 - 2312 4 sequence control Type From DS Subtype To DS More frag WEP More data Power mgt Retry Rsvd Protocol version 2 2 4 1 1 1 1 1 11 1
  9. 9. Physical Layer 9/13
  10. 10. IEEE 802.11 Frequency-Hopping Spread Spectrum 10/13
  11. 11. IEEE 802.11 Direct-Sequence Spread Spectrum 11/13
  12. 12. 12/13 IEEE 802.11 Infrared
  13. 13. Thanks To All

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