IEEE 802.11s - Wireless Mesh Network
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IEEE 802.11s - Wireless Mesh Network
- 1. IEEE 802.11s implementation for multimedia campus networking Sikkim Manipal Institute Of Technology Jan 2008 – Jun 2008
- 9. Client WMNs
- 10. Hybrid WMNs
- 11. Comparison with existing technologies
- 14. WLAN Coverage 802.11 WMN Wiring Costs Low High Number of APs As needed Twice as many Cost of APs High Low Bandwidth Good Very Good
- 17. Long bursts of interference Bursty noise might corrupt packets without affecting S/N measurements A B
- 18. Short bursts of interference (802.11) A B Outcome depends on relative signal levels When a nearby AP sends a packet, we lose a packet.
- 19. Multi-path interference Reflection is a delayed and attenuated copy of the signal A B B
- 20. SOFTWARE & HARDWARE DEVELOPMENT
- 22. HORN ANTENNA
- 24. CAT5 CABLE
- 25. i Pod Touch
- 26. Wireless Settings For iPod
- 27. WIRELESS ROUTER
- 29. LINKSYS WRT54G
- 31. WRT54G Series Router Specification
- 35. MS WINDOWS
- 37. WI FI RADAR
- 38. DEVELOPMENT PLATFORM MATLAB AND SIMULINK
- 50. TRAFFIC MONITORING GRAPH-2
- 51. NETWORK TRAFFIC TOP PROTOCOLS
- 53. Wireless Site Survey Netstumbler
- 55. Graph- SNR vs Time
- 56. Netstumbler Window Showing network details
- 65. CONFIGURTION OF A MESH NODE
- 66. FREIFUNK FIRMWARE LAN Settings
- 67. System Settings
- 68. MAD WI FI FIRMWARE
- 70. TOMATO FIRMWARE
- 77. STATUS OVERVIEW
- 78. STATUS OVERVIEW
- 86. TOOLS-PING
- 87. TOOLS-TRACE
- 96. Thank You
Notas del editor
- Now let’s talk about interference Previous slide covered non-bursty weak interference Make this not look like directional antennas (broadcasts, waves) Distance, trees attenuate signal Delivery probability depends in part on signal-to-noise ratio P(delivery) = f(S/N) Perhaps many Roofnet node pairs have S/N corresponding to intermediate delivery probabilities Mention S/N measurements calibrated in the lab Replace hypothesis slides w/ pictures Mention s/n reported by the card Don’t #2 make it sound so definite Qualify the second point Mention ‘textbook model of ber’
- We’ve eliminated the possibility that we’re losing bursts of packets We’ve narrowed the possibilities enough that we know we’re losing packets individiually “ the important special case” Start the explanation of this hypothesis here Why two phases? Mention it’s all beacons, constant, 8 APs XXX Roofnet shares its 802.11 channel with the rest of Cambridge XXX Other 802.11 traffic could corrupt our traffic at a time-scale of individual packets, without affecting our S/N measurements (xxx what’s the experiment?)