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

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AirPcap Nx and WiresharkAirPcap Nx and Wireshark is the perfect combination for:Learning about how things are functioningFinding out what 802.11n options and capabilities areoffered and negotiated in the airVerifying vendor specifications (like throughput etc.)Investigating compatibility issues between vendorsTraining technical peopleand much more…SHARKFEST ‘10 | Stanford University | June 14 –17, 2010
Frame Aggregation (config. examples)Cisco‘s 802.11abgn AP1250Buffalo‘s 802.11abgn PC-CardBy disabling A-MPDU with the 'no'command, the traffic associated with thatpriority level uses A-MSDU transmissionCommand line interface:ap1250(config)#interface dot11Radio 1ap1250(config-if)#no ampdu transmit priority 0SHARKFEST ‘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 26 and 27: New HT Capabilities in Beacon Frame
Page 28 and 29: Per-Packet Information Header (cont
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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