Health Diagnosis and Congestion Mitigation of WiFi Networks - - PowerPoint PPT Presentation
Health Diagnosis and Congestion Mitigation of WiFi Networks Mukulika Maity Prof. Bhaskaran Raman & Prof. Mythili Vutukuru Mukulika Maity Health Diagnosis and Congestion Mitigation of WiFi Networks Real-life WiFi Deployment AP Microwave
Mukulika Maity Health Diagnosis and Congestion Mitigation of WiFi Networks
Mukulika Maity Health Diagnosis and Congestion Mitigation of WiFi Networks
Slot3 Slot2 Slot1 G3 G2 G1 G3 G2 G1 MAC Queue AP
K T
Mukulika Maity Health Diagnosis and Congestion Mitigation of WiFi Networks
Wired or client issuesTCP slowdown Low level of aggregation (LowAggr) Low bitrate High loss rate Overcrowding MAC unfairness Ctl, mgt
(CtlMgtOvhd) Other BSS Wasted non decodable energy Co channel interference (CoChInterf) Slow talker Hidden terminal Low RSSI Rate adadptation confuses non channel loss (e.g. collision) for channel loss (RA) DCF collision Client side issues Non WiFi interference near client Client hidden Client hardware or system bottleneck Non WiFi device
Upload A A.Low offered load (LowLoad) B.Not enough airtime for AP C.Inefficient utilization
Poor Downlink Performance
Mukulika Maity Health Diagnosis and Congestion Mitigation of WiFi Networks
Healthy Lowload NonWiFi CoChInterf CtlMgtOvhd OtherBssOvhd OtherBssData Upload SlowT alker Overcrowding LowRSSI RA LowAggr 60 120 180 240 300 Time(s)
0.0 0.2 0.5
AggrThpt(Mbps)
Mukulika Maity Health Diagnosis and Congestion Mitigation of WiFi Networks