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 Sandhya Samsung Electronics 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 South 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 74. Element ID Length VHT Capabilities Info A-MPDU parameters Supported MCS Set Octets: 1 1 TBD 1 TBD Figure 74--VHT Capabilities element format VHT Capabilities Info field The subfields of the VHT Capabilities Info are defined in Table 714. Table 714--Subfields of the VHT Capabilities Info field Subfield Definition Encoding Maximum Length Indicates maximum length. See 9.7c. Set to 0 for 3839 octets Set to 1 for 7935 octets Set to 2 for 11414 octets 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 coded 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 using STBC TBD
FORMAT is VHT and CHAN_MAT_TYPE is COMPRESSED_SV TBD N Y NO_SIG_EXTN See corresponding entry in Table 20-1 FEC_CODING FORMAT is HT_MF, HT_GF or VHT Indicates FEC encoding is used. Enumerated type: BCC_CODING indicates binary convolutional code. LDPC_CODING indicates low-density parity check code. Y Y Otherwise Not present N N STBC FORMAT is HT_MF or HT_GF Indicates the difference between the number of space-time 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 FORMAT is NON_HT When present, indicates the BW to signal in the scrambler init field. Enumerated type: NON_HT_CBW20, NON_HT_CBW40, NON_HT_CBW80, NON_HT_CBW160 Y Y Otherwise Not present N N CH_OFFSET FORMAT is VHT TBD Y N LENGTH FORMAT is or HT_GF Indicates the length of an HT PSDU in the range of 0 to 65 535 octets. A value of zero indicates a NDP that contains no data symbols after the HT preamble (see 20.3.9 (HT preamble)). Y Y FORMAT is VHT Indicates the number of octets of useful data in the PSDU, i.e. the number of octets in the A-MPDU up to and including the last of the last non-zero length A-MPDU subframe but excluding the padding (if present) in the last subframe. This parameter is placed in the VHT-SIG-B Length field rounded up to a 4 octet boundary with the low order two bits removed. NOTE—the rounding up of the LENGTH parameter to a word boundary may result in a LENGTH parameter that is larger than the PSDU_LENGTH parameter. In the RXVECTOR, this parameter is the value obtained from the VHT-SIG-B Length field multiplied by 4 to represent a value in octets. A value of zero indicates a NDP that contains no data symbols after the VHT preamble. O Otherwise Not present N N PSDU_LENGTH FORMAT is VHT Indicates the number of octets in the VHT PSDU in the of 0 to 1,048,575 octets. N Y Otherwise Not present N N FORMAT is VHT for user in MU transmission. Integer: range 0-3 N
per frequency segment 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 field 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 each VHT LTF training 4 µs