Youngsoo Kim Samsung Electronics Mt. 14-1 Nongseo-Ri, Yongin-Si, Gyeonggi-Do, Korea 449-712 82-031-280-9614 kimyoungsoo@samsung.com Uikun Kwon Samsung Electronics Mt. 14-1 Nongseo-Ri, Yongin-Si, Gyeonggi-Do, Korea 449-712 82-31-280-9513 uikun.kwon@samsung.com Patil Sandhya Samsung Electronics TRIDIB, 65/2, Bagmane Tech Park, C V Raman Nagar, Bangalore - 560093. India sandhya.raga@samsung.com Chunhui (Allan) Zhu Samsung Electronics 75 W. Plumeria Dr., San Jose, CA 95131 +1-408-544-5667 c.zhu@samsung.com Aboul-Magd Samsung Electronics 75 W. Plumeria Dr., San Jose, CA 95134 1-408-544-5870 osama.magd@samsung.com Liwen Chu ST-Ericsson 2525 Augustine Drive, Santa Clara CA 95054 +1.408.467.8436 Liwen.Chu@st.com George Vlantis ST-Ericsson 2525 Augustine Drive, Santa Clara CA 95054 +1.408.893.9357 George.Vlantis@st.com Bo Sun ZTE Corporation ZTE Building, #10 Tangyan Rd., Xi'an, China 86 29 88724130 sun.bo1@zte.com.cn Kaiying Lv ZTE Corporation ZTE Building, #10 Tangyan Rd., Xi'an, China 86 29 88724130 lv.kaiying@zte.com.cn
Insert section 7.3.2.61: VHT Capabilities element VHT Capabilities element structure A VHT STA declares that it is a VHT STA by transmitting the VHT Capabilities element. The VHT Capabilities element contains a number of fields that are used to advertise additional optional VHT capabilities of a VHT STA. The VHT Capabilities element is present in Beacon, Association Request, Association Response, Reassociation Request, Reassociation Response, Probe Request, and Probe Response frames. The VHT Capabilities element is defined in Figure 75. Element ID Length VHT Capabilities Info VHT A-MPDU Parameters VHT Supported MCS Set Octets: 1 1 TBD 1 TBD Figure --VHT Capabilities element format VHT Capabilities Info field The VHT Capabilities Info field is 4 octets in length. The structure of this field is defined in Figure 76. B0-B1 B2-B3 B4 B5-B6 B7 B8 B9 B10 Maximum MPDU Length Supported Channel Set LDPC Coding Capability Short GI for 20/40/80/160 Tx STBC Rx STBC SU Beamformer Capable SU Beamformee Capable Bits: 2 2 1 2 1 1 1 1 B11-B12 B13-B15 B16-B18 B19 B20 B21 B22-B31 Grouping Set Compressed Steering Number of Beamformer Antennas Supported Number Of Sounding Dimensions MU Tx Capable MU Rx Capable VHT TXOP PS Reserved 2 3 3 1 1 1 13 Figure --VHT Capabilities Info field The subfields of the VHT Capabilities Info field are defined in Table 716. --Subfields of the VHT Capabilities Info field Subfield Definition Encoding Maximum MPDU Length Indicates the maximum MPDU length. See 9.7c. Set to 0 for 3895 octets when Maximum A-MSDU Length in HT Capabilities set to 3839
Set to 1 for 7991 octets (Maximum Length in HT Capabilities set to 7935) Set to 2 for 11454 octets (Maximum A-MSDU Length in HT Capabilities set to 7935) The value 3 is reserved Supported Channel Width Set Set to 0 if the STA does not support either 160 or 80+80 MHz Set to 1 if the STA supports 160 MHz Set to 2 if the STA supports 160 MHz and 80+80 MHz The value 3 is reserved LDPC Coding Capability Indicates support for receiving LDPC packets Set to 0 if not supported Set to 1 if supported Short GI for 20/40/80/160 Indicates support for receiving packets using the short guard interval in various bandwidths TBD Tx STBC Indicates support for the transmission of at least 2x1 STBC Set to 0 if not supported Set to 1 if supported Rx STBC Indicates support for the reception of PPDUs using STBC TBD SU Beamformer Capable Indicates support for operation as a single user beamformer Set to 0 if not supported Set to 1 if supported SU Beamformee Capable Indicates support for operation as a single user beamformee Set to 0 if not supported Set to 1 if supported Grouping Set Indicates acceptable values for the VHT MIMO Control Grouping parameter with sounding feedback Set to 0 for Ng = 1 Set to 1 for Ng = 1 or 2 Set to 2 for Ng = 1 or 4 Set to 3 for Ng = 1, 2 or 4 Compressed Steering Number of Beamformer Antennas Supported Indicates the maximum number of beamformer antennas the beamformee can support when sending compressed beamforming feedback Set to maximum value minus 1 Number of Sounding Dimensions Indicates the number of antennas used by the beamformer when sending beamformed transmissions Set to value minus 1 MU Tx Capable Indicates whether or not the STA supports operation as an MU beamformer Set to 0 if not supported Set to 1 if supported MSDU
Otherwise Not present N N SERVICE FORMAT is NON_HT and is OFDM Scrambler initialization, 7 null bits + 9 reserved null bits Y N FORMAT is HT_MF or HT_GF Scrambler initialization, 7 null bits + 9 reserved null bits Y N FORMAT is VHT Not present N N Otherwise Not present N N SMOOTHING See corresponding in Table 20-1 AGGREGATION See corresponding entry in Table 20-1 NUM_EXTEN_SS See corresponding entry in Table 20-1 ANTENNA_SET See corresponding entry in Table 20-1 N_TX FORMAT is HT_MF, HT_GF or VHT The N_TX parameter indicates the number of transmit chains. Y N Otherwise Not present N N
FORMAT is VHT and CHAN_MAT_TYPE is COMPRESSED_SV TBD N Y NO_SIG_EXTN FORMAT is VHT Not present N N Otherwise See corresponding entry in Table 20-1 FEC_CODING FORMAT is VHT Indicates which FEC encoding is used. Enumerated type: BCC_CODING indicates binary convolutional code. LDPC_CODING indicates low-density parity check code. Otherwise See corresponding in Table 20-1 STBC FORMAT is or HT_GF Indicates the difference between the number of streams (NSTS ) and the number of spatial streams (NSS ) indicated by the MCS as follows: 0 indicates no STBC (NSTS=NSS ). 1 indicates NSTS-NSS=1. 2 indicates NSTS-NSS=2. Value of 3 is reserved. Y Y FORMAT is VHT Indicates whether or not STBC is used. 0 indicates no STBC (NSTS=NSS). 1 indicates NSTS=2NSS Y Y Otherwise Not present N N GI_TYPE FORMAT is HT_MF, HT_GF or VHT Indicates whether a short guard interval is used in the transmission of the packet. Enumerated type: LONG_GI indicates GI is not used in the packet. SHORT_GI indicates short GI is used in the packet. Y Y Otherwise Not present N N TXPWR_LEVEL The allowed values for the TXPWR_LEVEL parameter are in the range from 1 to 8. This parameter is used to indicate which of the available TxPowerLevel attributes defined in the MIB shall be used for the current transmission. Y N
Otherwise Not present N N NUM_STS FORMAT is VHT Indicates the number of streams Integer: range 1-8 for SU, 0-4 for MU Y Otherwise Not present N N GROUP_ID FORMAT is VHT Indicates the Group ID. Y Y Otherwise Not present N N PARTIAL_AID FORMAT is VHT and NUM_USERS set to 1 Indicates the least significant 9 bits of the AID of the intended recipient or 0 if intended for multiple recipients Y Y Otherwise Not present N N NUM_USERS FORMAT is VHT Indicates the number of users in rage 1 through 4. A value of 1 indicates an SU transmission, while a value greater than 1 indicates a MU transmission. Y N Otherwise Not present N N FORMAT is VHT 0 indicates AP allows non-AP VHT STAs to doze mode during a TXOP. 1 indicates AP does not allow non-AP VHT STAs to enter doze mode during a TXOP. Y Y NOTE— In the “TXVECTOR” and “RXVECTOR” columns, the following apply: Y = Present; N = Not present; O = Optional; MU indicates that the parameter is present per user. Parameters specified to be present per user are conceptually supplied as an array of values indexed by USER_NUM, where USER_NUM takes values 1 through NUM_USERS. Effects of CH_BANDWIDTH, CH_OFFSET, MCS and NUM_STREAMS parameters on PPDU format TBD
See NOTE 1 NSR: Highest data subcarrier index per frequency segment 28 58 122 122 250 NSeg: Number of frequency segments 1 1 1 2 1 ∆F: Subcarrier frequency spacing 312.5 kHz TDFT: IDFT/DFT period 3.2 µs TGI: Guard interval duration 0.8 µs = TDFT /4 TGI2: Double interval 1.6 µs TGIS: Short guard interval duration 0.4 µs = TDFT /8 TL-STF: Legacy short training sequence duration 8 µs = 10 x TDFT /4 TL-LTF: Legacy long training sequence duration 8 µs = 2 x TDFT + TGIS TSYM: Symbol interval 4 µs = TDFT + TGI Short GI symbol interval 3.6 µs = TDFT + TGIS TL-SIG: Legacy SIGNAL duration 4 µs TVHT-SIG-A: VHT SIGNAL A field duration 8 µs = 2TSYM TVHT-STF: VHT short training field duration 4 µs TVHT-LTF: Duration of 4 µs
If STBC is applied, the stream of complex numbers, , generated by the constellation mapper, is the input of the STBC encoder, which produces as output the stream of complex numbers . For given values of k and i, STBC processing operates on the complex modulation symbols in sequential pairs of OFDM symbols so that the value of depends on and and also depends on and , as defined in Table 2216. --Constellation mapper output to spatial mapper input for STBC NSTS NSS iSTS 2 1 1 2 4 2 1 2 3 4 6 3 1 2 3 4 5 6 8 4 1 2 3 4 5 6 7 8 If STBC is not applied, and . NOTE--When STBC is applied, an odd number of space time streams per user is not allowed, and . Pilot subcarriers For a 20 MHz transmission, four pilot tones shall be inserted in subcarriers –21, –7, 7, and 21. The pilot mapping for subcarrier k for symbol n shall be as follows where is given by the NSTS = 1 row of Table 20-18 of Clause 20. For a 40 MHz transmission, six pilot tones shall be inserted in subcarriers –53, –25, –11, 11, 25, and 53. The pilot mapping for subcarrier k for symbol n shall be as follows where is given by the NSTS = 1 row of Table 20-19 of Clause 20. For an 80 MHz transmission, pilot tones shall be inserted in subcarriers –103, –75, –39, –11, 11, 39, 75, and 103. The pilot mapping for subcarrier k for symbol n shall be as follows where is defined in Table 2217. 2217 – Pilot values for 80 MHz transmission 0 1 2 3 4 5 6 7 1 1 1 -1 -1 1 1 1
Editor’s note: Modify Insert rows for regulatory classes <ANA> through <ANA>, change the reserved rows, and insert the note in Table J-2 as follows (note that the entire table is not shown): Table J-2 – Operating classes in Europe Operating class Global operating class (see Table J.4) Channel starting frequency (GHz) Channel spacing (MHz) Channel set Channel center frequency index Behavior limits set <ANA> TBD 5 80 - 42 VHT80MHzBehavior, IndoorOnlyBehavior, <ANA> TBD 5 80 - 58, 106, 122 VHT80MHzBehavior, NomadicBehavior, <ANA> TBD 5 160 - 50 VHT160MHzBehavior, IndoorOnlyBehavior, NomadicBehavior, <ANA> TBD 5 160 - 50 VHT160MHzBehavior, NomadicBehavior, Reserved Reserved Reserved Reserved Reserved NOTE—The channel spacing for operating classes <ANA> through <ANA> is for the supported bandwidth rather than the operating bandwidth. Editor’s note: Modify Insert rows for regulatory classes <ANA> through <ANA>, change the reserved rows, and insert the note in Table J-3 as follows (note that the entire table is not shown): Table J-3 – Operating classes in Japan Operating class Global class (see Table J.4) Channel starting (GHz) Channel spacing (MHz) Channel set Channel center frequency Behavior limits set <ANA> TBD 5 80 - 42 VHT80MHzBehavior, IndoorsOnlyBehavior, CS4msBehavior <ANA> TBD 5 80 - 58 VHT80MHzBehavior, IndoorsOnlyBehavior,