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

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New HT Capabilities in Beacon FrameSHARKFEST ‘10 | Stanford University | June 14 –17, 2010
Per-Packet Information Header (PPI)New PPI header replaces the radiotap header used in802.11a/b/g with additional 802.11n radio informationPPI adds a pseudoheaderto each packetand provides Metadata about RF signalstrength, timing,options etc.ReferencesRadiotap manual:PPI manual:http://netbsd.gw.com/cgi-bin/man-cgi?ieee80211_radiotap+9+NetBSD-currenthttp://www.cacetech.com/documents/PPI_Header_format_1.0.1.pdfSHARKFEST ‘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 and 12: Multi-Streaming Modulation802.11a/g
Page 13 and 14: MCS Configuration1 spatial stream 2
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 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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