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Time-based Fairness Improves Performance
in Multi-rate WLANs

Godfrey Tan and John Guttag
MIT Computer Science and Artificial Intelligence Laboratory
{godfreyt, guttag}@csail.mit.edu

• Abstract
• Introduction
• Analysis
  • Impact of Fairness Notions on Efficiency
  • Fairness in AP-based WLANs
  • Network Model
  • Impact of DCF on Fairness Notions
    • Impact of Rate Diversity
    • Impact of Packet Size Diversity
  • Impact of the AP Queuing Scheme
  • Impact of Time-based Fairness
  • Examples
  
  
• Existence of Rate Diversity
  • Multiple Users during Busy Periods
  
  
• Time-based Regulator
  • Scheduling Frame Transmissions
  • Computing Channel Occupancy Time
  • Keeping Channel Utilization High
  • An 802.11-based Implementation
  • Discussion
  
  
• Evaluation
• Related Work
• Summary and Conclusion
• Bibliography
• About this document ...