NS-3.21 extension Latest update: 2017-10-30 This version contains IEEE 802.11ac mandatory features. 1) Up to 80 MHz tx/rx 2) Multiple streams (MMSE receiver) 3) A-MPDU 4) TXOP 5) Caudal loss Others: 1) minstrel_ht 2) Caudal loss modeling 3) Second capture effect 4) CCA sensitivity modification (based on standard document) Bug fix report: 1) 150825 Second capture bug (handling packet pointer that will be ignored) 2) 150825 RTS/CTS duration bug (do not change PHY rate after RTS/CTS exchange) 3) 150825 BlockAckReq preamble bug (use HT/VHT preamble since BlockAckReq will be sent 11n/ac PHY rate) 4) 150910 MIMO SNR bug (MMSE filter input channel variance should be 1) 5) 160328 TXOP implementation 6) 160328 BlockAck Sequence bug 7) 161103 Remove STRALE/MoFA from the code 8) 161103 Second capture bug (When second capture occurs, each MPDU should be dropped) 9) 161103 Minstrel bug (RTS/CTS should not be included in statistics) 10) 161103 Interference power also used for CCA and capture decision bug (pathloss + fading) 11) 161103 CCA bug (When a station does not receive legacy preamble, EDCCA is required) 12) 171030 Bug when receiving second captured A-MPDU 13) 171030 Minstrel HT bug 14) 171030 Disable ErrorFreeTag on ACK frame 15) 171030 CCA sensitivity with wide band operation (-72 dBm) in YansWifiPhy-StartReceivePacket 16) 171030 Symmetric channel fading gain 17) 171031 CCA sensitivity in MaybeCCABusy of YansWifiPhy-StartReceivePacket (shall not be normalized by used bandwidth) 18) 171102 CCA sensitivity in MaybeCCABusy of YansWifiPhy-StartReceivePacket (-62 for P20 and -72 for S20 & S40, respectively) 19) 171102 NoiseFloor normalized for 20 MHz in CalculateSnr of InterferenceHelper 20) 171102 Fading gain & wide bandwidth consideration in CalculatePer of InterferenceHelper (for non A-MPDU) 21) 171102 Subframe length, PHY header PER & duration modified in CalculateAmpduPer of InterferenceHelper (for A-MPDU) To do list: 1) EDCCA should be used after L-SIG error (carrier lost) 2) Channel correlation across bonding channel 3) Interference power calculation for multiple streams considering # rx antennas 4) Data rate using long G.I for VHT PPDU