HTM5.1 Ack mechanism 8.3.1.8 CF16:M Yes No N/A    frame format), 8.3.1.9 frame format), 8.4.1.14 (Block Ack Parameter Set field), 9.20 (Block (Block Ack)), 10.15 (20/40 MHz BSS operation(11n)) HTM5.2 Use of compressed bitmap between 8.3.1.9.3 CF16:M Yes No N/A    HT STAs (Compressed BlockAck variant(11n)), 9.20.6 (Selection of BlockAck and BlockAckReq variants(11n)), HTM5.3 HT-immediate Block Ack extensions 9.20.7 CF16:M Yes No N/A    Block Ack extensions) HTM5.4 HT-delayed Block Ack extensions 9.20.8 CF16 Yes No N/A    Block andQB4.2:M Ack extensions) HTM5.5 Multiple Block Ack 8.3.1.8.4 HTM12:M Yes No N/A    (Multi-TID BlockAckReq variant(11n)), 8.3.1.9.4 (Multi-TID BlockAck variant(11n)), 9.25.1.7 (PSMP rules(11n)) HTM6 Protection mechanisms for different HT PHY options HTM6.1 Protection of RIFS PPDUs in the 9.22.3.3 (RIFS CF16:M Yes No N/A    presence of non-HT STAs HTM6.1a Protection of RIFS PPDUs in an IBSS 9.22.3.3 (RIFS CF16:M Yes No N/A   
HTM5.1 Ack mechanism 8.3.1.8 frame format), 8.3.1.9 frame format), 8.4.1.14 (Block Ack Parameter Set field), 9.20 (Block (Block Ack)), 10.15 (20/40 MHz BSS operation(11n)) CF16:M Yes  No  N/A  HTM5.2 Use of compressed bitmap between HT STAs 8.3.1.9.3 (Compressed BlockAck variant(11n)), 9.20.6 (Selection of BlockAck and BlockAckReq variants(11n)), CF16:M Yes  No  N/A  HTM5.3 HT-immediate Block Ack extensions 9.20.7 Block Ack extensions) CF16:M Yes  No  N/A  HTM5.4 HT-delayed Block Ack extensions 9.20.8 Block Ack extensions) CF16 andQB4.2:M Yes  No  N/A  HTM5.5 Multiple Block Ack 8.3.1.8.4 (Multi-TID BlockAckReq variant(11n)), 8.3.1.9.4 (Multi-TID BlockAck variant(11n)), 9.25.1.7 (PSMP rules(11n)) HTM12:M Yes  No  N/A  HTM6 Protection mechanisms for different HT PHY options HTM6.1 Protection of RIFS PPDUs in the presence of non-HT STAs 9.22.3.3 (RIFS CF16:M Yes  No  N/A  HTM6.1a Protection of RIFS PPDUs in an IBSS 9.22.3.3 (RIFS CF16:M Yes  No  N/A 