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

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How the Goals are achievedA combination of technical functions at PHY and MAClayers are added to the existing 802.11 standard: Increasing the physical transfer rate with newmodulation scheme and timing up to 600Mbps New multi-streaming modulation technique usingMIMO (multiple input, multiple output antennas) Joining two adjacent channels with Channel bonding Support for frame aggregation A-MPDU & A-MSDU New Block AcknowledgmentsSHARKFEST ‘10 | Stanford University | June 14 –17, 2010
PHY layer improvementsModified OFDMThe number of OFDM data sub-carriers is increasedfrom 48 to 52 which improves the maximumthroughput from 54 to 58.5 MbpsForward Error CorrectionFEC is a system of error control whereby the senderadds redundant data to allow the receiver to detectand correct errors. 3/4 coding rate is improved with5/6 boosting the link rate from 58.5 to 65 MbpsSHARKFEST ‘10 | Stanford University | June 14 –17, 2010
Page 1 and 2: WLAN 802.11n MIMO AnalysisJune 17,
Page 3: Design Goals for 802.11n• IEEE 80
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 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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