A-10 (Leutert) WLAN 802.11n MIMO Analysis - Sharkfest - Wireshark

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Modulation Coding Scheme (MCS)802.11n introduces a new Modulation Coding Scheme802.11 b/g adapts to channel conditions by selectingthe highest of 12 possible rates from 1 to 54 MbpsThe 802.11n standard will allow some 77 possibleMCS’ - some compulsory, some optionalMCS selects, based on RF channel conditions, thebest combination of 8 data rates, bonded channels,multiple spatial streams, different guard intervals andmodulation typesSHARKFEST ‘10 | Stanford University | June 14 –17, 2010
MCS Configuration1 spatial stream 2 spatial streamsScreenshot Cisco AP1250SHARKFEST ‘10 | Stanford University | June 14 –17, 2010
Page 1 and 2: WLAN 802.11n MIMO AnalysisJune 17,
Page 3 and 4: Design Goals for 802.11n• IEEE 80
Page 5 and 6: PHY layer improvementsModified OFDM
Page 7 and 8: Channel Bonding (Channel 6 & 10)Rec
Page 9 and 10: Channel Bonding (configuration)802.
Page 11: Multi-Streaming Modulation802.11a/g
Page 15 and 16: MAC layer improvementsFrame Aggrega
Page 17: A-MSDU AnalysisAll trace files made
Page 20 and 21: Block-ACK MechanismRather than send
Page 22 and 23: Block-ACK Bitmap AnalysisSHARKFEST
Page 24 and 25: Block-ACK negotiation/activationThe
Page 26 and 27: New HT Capabilities in Beacon Frame
Page 28 and 29: Per-Packet Information Header (cont
Page 30 and 31: AirPcap Nx and WiresharkAirPcap Nx
Page 32 and 33: Analysing ‘Bad BAR’ problemSHAR
Page 34 and 35: Analysing ‘Deadlock’ problemPro
Page 36 and 37: Analysing ‘Deadlock’ problem (c
Page 38 and 39: Backwards compatibility to a/b/gPre
Page 40 and 41: Backwards compatibility to a/b/g (c
Page 42 and 43: Future of 802.11nStandard has been

A-10 (Leutert) WLAN 802.11n MIMO Analysis - Sharkfest - Wireshark

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