Abstract:
A method and a device for transmitting a multiuser uplink in the wireless LAN are disclosed. A method for receiving each uplink frame from a plurality of STAs in the wireless LAN can comprise the steps of: transmitting, by an AP, a downlink PPDU to the plurality of STAs on an overlapping time resource; and receiving, by the AP, each uplink frame from each of the plurality of STAs on an overlapping time resource through each uplink transmission resource with respect to each of the plurality of STAs, as the response to the downlink PPDU.
Abstract:
A method and apparatus for performing effective feedback in a wireless communication system supporting multiple antennas. A method for transmitting CSI of downlink transmission via uplink in a wireless communication system includes transmitting a joint-coded rank indicator (RI) and a first wideband (WB) precoding matrix indicator (PMI) at a first subframe, and transmitting a wideband channel quality indicator (WB CQI) and a second WB PMI at a second subframe. A user equipment (UE) preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. If the RI is Rank-1 or Rank-2, the first PMI indicates one of subsets each having 8 indexes from among 16 indexes of the first PMI of a precoding codebook.
Abstract:
A method and a device for transmitting a data unit are disclosed. A method for transmitting a PPDU can comprise the steps of: generating, by an STA, the PPDU including a first portion and a second portion; and transmitting, by the STA, the PPDU, wherein the first portion is generated by performing IFFT according to a first FFT size, the second portion is generated by performing IFFT according to a second FFT size, and the first FFT size can differ from the second FFT size.
Abstract:
A method for estimating a location of a mobile station includes transmitting a position request signal, including at least departure time information or an identifier of the mobile station, to an AP by synchronizing with the AP, receiving first position information, including at least a calculated first location of the mobile station or a calculated first distance between the mobile station and the AP and departure time information of a position response signal, from the AP, calculating a ToA of a signal between the mobile station and the AP based on the departure time information of the position response signal, calculating at least a second distance between the mobile station and the AP or a second location of the mobile station using the ToA, and determining a final location of the mobile station based on the first position information and at least the second distance or the second location.
Abstract:
In a Wireless Local Area Network system, an STA may receive a trigger frame from an AP. The trigger frame may include a common information field and user information fields. Each of the user information fields may include a first field related to an association identifier (AID) and a second field including information for the STA related to the AID. The second field may include special information for every STA receiving the trigger frame on the basis that the first field has a specific value. The common information field may include a present field related to whether a user information field in which the first field has the specific value is present among the user information fields.
Abstract:
The present disclosure proposes a method and device for using a coding subfield reserved for MU-MIMO in a wireless LAN system. Specifically, a receiving STA receives an MU PPDU from a transmitting STA. The receiving STA decodes the MU PPDU. The MU PPDU includes EHT-SIG and a data field. The EHT-SIG includes a common field and a user field. The user field includes a coding subfield and an MCS subfield. If the data field is transmitted in an RU or MRU having a size larger than a 242 RU on the basis of MU-MIMO, the coding subfield is reserved. If the value of the coding subfield is set to 0, the MCS subfield includes information on a second MCS different from a first MCS defined in an EHT wireless LAN system.
Abstract:
An example according to the present specification relates to a technique relating to a configuration of a preamble in a wireless LAN (WLAN) system. A transmitting STA may generate and transmit an EHT PPDU. The EHT PPDU may include an L-SIG field, an RL-SIG field, and a control field. A result of “modulo 3 operation” to a length field value of the L-SIG field may be set to “0”. The RL-SIG field may be configured the same as the L-SIG field. The control field may include 3-bit information relating to a version of a PPDU.
Abstract:
The present disclosure proposes a method and apparatus for transmitting capability information of a receiving STA in a wireless LAN system. Specifically, a receiving STA generates capability information of the receiving STA and transmits same to a transmitting STA. The capability information of the receiving STA includes an EHT Capabilities element. The EHT Capabilities element includes a Supported EHT-MCS And NSS Set field. The Supported EHT-MCS And NSS Set field includes first to fourth sub-fields. The first subfield includes information related to the maximum number of spatial streams that the receiving STA can transmit/receive in each MCS, if the receiving STA is a non-AP STA operating only at 20 MHz, and a transmission bandwidth is 20 MHz, 40 MHz, 80 MHz, 160 MHz or 320 MHz.
Abstract:
The present specification defines a link adaptation control subfield applicable to a next-generation wireless LAN system including an EHT specification. According to an embodiment described in the present specification, the link adaptation control subfield may include a PS160 subfield. According to another embodiment described in the present specification, the link adaptation control subfield may include a 1-bit MRQ/uplink TB PPDU MFB subfield.
Abstract:
The present specification (disclosure) proposes a method and device for applying a sequence and preamble puncturing to an A-PPDU in a wireless LAN system. Specifically, a reception STA receives an A-PPDU from a transmission STA. The reception STA decodes the A-PPDU. The A-PPDU includes a first PPDU for a primary 160 MHz channel and a second PPDU for a secondary 160 MHz channel. The reception STA is allocated to the secondary 160 MHz channel by SST. The first PPDU is transmitted on the basis of a first sequence for 160 MHz and a first preamble puncturing pattern for 160 MHz. The second PPDU is transmitted on the basis of a second sequence for 160 MHz and a second preamble puncturing pattern for 160 MHz.