Wireless LANs

• Wireless LANs
• Overview
  
• Mobile vs Wireless
  
• CDMA
  
• Frequency Hopping Spread Spectrum
  
• Spectrum
  
• Slow Frequency Hop Spread Spectrum
  
• Fast Frequency Hop Spread Spectrum
  
• Direct-Sequence Spread Spectrum
  
• DS Spectrum
  
• Code Division Multiple Access (CDMA)
  
• CDMA Example
  
• CDMA Encoding and Decoding
  
• OFDM
  
• Wireless LAN Requirements
  
• Wireless LANs
  
• Infrared LANs
  
• IEEE 802.11 Features
  
• Hidden Node Problem
  
• 4-Way Handshake
  
• IEEE 802.11 MAC
  
• Peer-to-Peer or Base Stations?
  
• IEEE 802.11 Architecture
  
• Architecture
  
• IEEE 802.11 Priorities
  
• Time Critical Services
  
• Power Management
  
• Frame Format
  
• MAC Frame Fields
  
• 802.11 Address Fields
  
• Station Location
  
• IEEE 802.11 Phy
  
• Why 2.4 GHz?
  
• FHSS Phy
  
• DSSS Phy
  
• Infrared Phy
  
• 802.11 Physical Layers
  
• IEEE 802.11 Protocol Architecture
  
• 802.11a
  
• 802.11b
  
• 802.11g
  
• Summary
  
• Reading Assignment
  
• Homework
  

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