Bits: 3 3 2 2 1 1 3 1 2 6 MIMO Control field The subfields of the VHT MIMO Control field are defined in Subfields of the VHT MIMO Control field . Subfields of the VHT MIMO Control field Subfield Description Nc Indicates the number of columns, Nc, in the compressed beamforming feedback matrix minus one: Set to 0 for Nc = 1 Set to 1 for Nc = 2 … Set to 7 for Nc = 8 Nr Indicates the number of rows, Nr, in the compressed beamforming feedback matrix one: Set to 0 for Nr = 1 Set to 1 for Nr = 2 … Set to 7 for Nr = 8 Channel Width Indicates the width of the channel in which the measurement to create the compressed beamforming feedback matrix was made: Set to 0 for 20 MHz Set to 1 for 40 MHz Set to 2 for 80 MHz Set to 3 for 160 MHz or 80+80 MHz Grouping Indicates the subcarrier grouping, Ng, used for the compressed beamforming feedback matrix: Set to 0 for Ng = 1 (No grouping) Set to 1 for Ng = 2 Set to 2 for Ng = 4 The value 3 is reserved Codebook Information Indicates the size of codebook entries: If Feedback Type is SU: Set to 0 for 2 bits for ψ, 4 bits for  Set to 1 for 4 bits for ψ, 6 bits for  If Feedback Type is MU: Set to 0 for 5 bits for ψ, 7 bits for  Set to 1 for 7 bits for ψ, 9 bits for  Feedback Type Indicates the feedback type: Set to 0 for SU Set to 1 for MU
Triplet field If dot11OperatingClassesRequired is true, then the Triplet field is composed of Operating/Subband Sequences, as shown in Triplet field if dot11OperaratingClassRequired is true. Each Operating/Subband Sequence is composed of one Operating Triplet field followed by one Subband Triplet Sequence field, as shown in Format of . Each Subband Triplet Sequence field is composed of Subband Triplet(#6248) fields. he number of triplets in the Triplet field is . One or more indexed by Operating/Subband Sequence Octets: Triplet field if dot11OperaratingClassRequired is true Operating Triplet Subband Triplet Sequence made up of P(m) Subband Triplet fields, where Operating Extension Identifier Operating Class Coverage Octets: 1 1 1 3P(m) of m-th Operating/Subband Sequence The number Q of Subband or Operating riplets in the element is determined by the Length An operating class for an 80+80 MHz channel width is expressed by two consecutive Operating/Subband Sequences, where the first Operating/Subband Sequence field contains an Operating Triplet for an 80 MHz Channel Spacing with an 80+ Behavior Limit and the second Operating/Subband Sequence field contains an Operating Triplet for an 80 MHz Channel Spacing without an 80+ Behavior Limit. Operating/Subband Sequence fields for 80, 160 or 80+ MHz operating classes contain zero Subband Triplet fields. NOTE—The VHT Transmit Power Envelope element is always used for TPC for 80 MHz, 160 MHz or 80+80 MHz operating classes instead of subband triplets (see 10.39.1 (Basic VHT BSS functionality)). The Operating Triplet has a value of 201 or greater.
AC CWmin CWmax TXOP For PHYs defined in Clause 16 and Clause 17 For PHYs defined in Clause 18, Clause 19, and Clause 20 and Clause 22 PHYs AC_BK aCWmin aCWmax 7 0 0 0 AC_BE aCWmin aCWmax 3 0 0 0 AC_VI (aCWmin+1)/2 – 1 aCWmin 2 6.016 ms 3.008 ms 0 (aCWmin+1)/4 – 1 (aCWmin+1)/2 – 1 2 3.264 ms 1.504 ms 0 Neighbor Report element Replace Figure 8-216 with the following (adding the Very High Throughput field): B0 B1 B2 B3 B4 B9 B10 B11 B12 B13 B31 AP Reachability Key Scope Capabilities Mobility Domain High Throughput Very High Throughput Reserved 2 1 1 6 1 1 1 19 Information field Insert the following paragraph the paragraph that starts “The High Throughput bit...”: The Very High Throughput bit is set to 1 to indicate that the AP represented by this BSSID is a VHT AP and that the VHT Capabilities element, if included as a subelement in the report, is identical in content to the VHT Capabilities element included in the AP’s Beacon. Change the subsequent paragraph as follows: Bits 1213-31 are reserved. Change Optional Subelement IDs for Neighbor Report as follows (adding Subelement 46 following 45 and Subelement 63 following 62): Optional Subelement IDs for Neighbor Report Subelement ID Name Length field (octets) Extensible
present 0 Local Maximum Transmit Power For 20 MHz 1 Local Maximum Transmit Power For 20 MHz Local Maximum Transmit Power For 40 MHz 2 Local Maximum Transmit Power For 20 MHz Local Maximum Transmit Power For 40 MHz Local Maximum Transmit Power For 80 MHz 3 Local Maximum Transmit Power For 20 MHz Maximum Transmit Power For 40 MHz Local Maximum Transmit Power For 80 MHz Local Maximum Transmit Power For 160/80+80 MHz 4-7 Reserved The Local Maximum Transmit Power Units Interpretation subfield provides additional interpretation for the units of the Local Maximum Transmit Power for X MHz fields (where X = 20, 40, 80 or 160/80+80) and is defined in Definition of Local Maximum Transmit Power Units Interpretation subfield. Allowed values are further constrained as defined in Annex E. of Local Maximum Transmit Power Units Interpretation subfield Value Units Interpretation of the Local Maximum Transmit Power for X MHz fields 0 EIRP 1-7 Reserved NOTE—This table is only expected to be updated if regulatory domains mandate the use of transmit power control with limits that cannot be converted into an EIRP value per PPDU bandwidth. Maximum Transmit Power For X MHz fields (where X = 20, 40, 80 or 160/80+80) define the local maximum transmit power limit of the transmission bandwidth X MHz. Each Local Maximum Transmit Power For X MHz field is encoded as an 8-bit 2's complement signed integer in the range of -64 dBm to 63 dBm with a 0.5 dB step. The value of 63.5 dBm indicates 63.5 dBm or higher (i.e.,(#6016) no local maximum transmit power constraint). Channel(#6005) Switch Wrapper element The Channel Switch Wrapper contains sub-elements that indicate characteristics of the BSS a channel switch. The format of the Channel Switch Wrapper element is defined in Channel Switch Wrapper element format. Zero or one Zero or one Zero or more
Name of Context Definition of Context Table defining permitted contents Data Enabled Immediate Response The A-MPDU is transmitted outside a PSMP sequence by a TXOP holder or an RD responder including potential immediate responses. Table 8-284 (A-MPDU contents in the data enabled immediate response context) Data Enabled No Immediate Response The A-MPDU is transmitted outside a PSMP sequence by a TXOP holder that does not include or solicit an immediate response. See NOTE. Table 8-285 (A-MPDU contents in the data enabled no immediate response context) PSMP The A-MPDU is transmitted within a PSMP sequence. Table 8-286 (A-MPDU contents in the PSMP context) Control Response The A-MPDU is transmitted by a STA that is neither a TXOP holder nor an RD responder that also needs to transmit one of the following immediate response frames: AckACK BlockAck with a TID for which an HT-immediate Block Ack agreement exists 8-287 (A-MPDU contents MPDUs in the control response context) VHT single MPDU context The A-MPDU is transmitted(#6551) within a VHT PPDU and contains a VHT single MPDU. A-MPDU contents in the VHT single MPDU context NOTE—This context includes cases when no response is generated or when a response is generated later by the operation of the delayed Block Ack rules. Insert new table below: A-MPDU contents in the VHT single MPDU context MPDU Conditions Any MPDU A VHT single MPDU.(#6412)
5 DSSS-OFDM The use of the DSSS-OFDM option is deprecated, and this option may be removed in a later revision of the standard. 19.7 transmission FORMAT is NON_HT. is DSSS-OFDM. N/A 6 ERP-OFDM 19.5 transmission FORMAT is NON_HT. is ERP-OFDM. N/A 7 OFDM Clause 18 transmission FORMAT is NON_HT. is OFDM or FORMAT is NON_HT. is OFDM or 8 HT N/A FORMAT is HT_MF or HT_GF. FORMAT is or HT_GF 9(11ad) DMG Control Clause 21.4 transmission N/A N/A 10(11ad) DMG SC Clause 21.6 transmission N/A N/A 11(11ad) DMG OFDM Clause 21.5 transmission N/A N/A 12(11ad) DMG low power SC Clause 21.7 transmission N/A N/A 13 VHT N/A N/A FORMAT is VHT Non-HT basic rate calculation Change as follows: This subclause defines how to convert an HT MCSs and VHT MCSs to a non-HT rate for the purpose of determining the rate of the a response frame. It consists of two steps as follows: Use the modulation and coding rate determined from the HT MCS (defined in 20.6 (Parameters for HT MCSs)) or VHT MCS (defined in 22.5 (Parameters for VHT MCSs)) to locate a non-HT reference rate by lookup into Non-HT reference rate.27 In the case of an MCS with UEQM, the modulation of stream 1 is used. The non-HT basic rate is the highest rate in the BSSBasicRateSet that is less than or equal to this non-HT reference rate.