Operation method of station in wireless local area network

Abstract

An operation method of a station in a wireless local area network (WLAN) is disclosed. An operation method of a first station comprises generating a high efficiency (HE) preamble including scheduling information of a plurality of reception stations; and generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including a legacy preamble, the HE preamble, and a payload having data units to be transmitted to the plurality of reception stations. Therefore, a performance of WLAN may be enhanced.

What is claimed is: 
     
         1 . A method performed by a station operating in a wireless network, the method comprising:
 generating a high efficiency preamble, including a first high efficiency signaling field and a second high efficiency signaling field, wherein the second high efficiency signaling field includes first scheduling information corresponding to a first plurality of reception stations and second scheduling information corresponding to a second plurality of reception stations different from the first plurality of reception stations, wherein (1) the first scheduling information includes a first part, which includes first resource allocation information including a first allocation pattern for a first set of frequency bands, and a second part, which includes a first list of station identifiers, including identifiers for the first plurality of reception stations and (2) the second scheduling information includes a first part, which includes second resource allocation information including a second allocation pattern for a second set of frequency bands, and a second part, which includes a second list of station identifiers, including identifiers for the second plurality of reception stations;   generating a physical layer protocol data unit (PPDU) including a legacy preamble, the high efficiency preamble, and a payload, wherein the high efficiency preamble is after the legacy preamble in the PPDU and the payload is after the high efficiency preamble in the PPDU, wherein the payload is composed of a plurality of resource units; and   transmitting the PPDU using the first set of frequency bands and the second set of frequency bands to the first plurality of stations and the second plurality of stations.   
     
     
         2 . The method of  claim 1 , wherein the legacy preamble includes a legacy short training field, a legacy long training field, and a legacy signaling field, and
 wherein the first high efficiency signaling field, the second high efficiency signaling field, and the legacy preamble have a subcarrier spacing of 312.5 kHz.   
     
     
         3 . The method of  claim 2 , wherein the PPDU includes a high efficiency short training field and one or more high efficiency long training fields, wherein the high efficiency short training field, the one or more high efficiency long training fields, and the payload have a subcarrier spacing of 78.125 kHz. 
     
     
         4 . The method of  claim 3 , wherein a number of high efficiency long training fields is set based on a number of spatial streams used for the PPDU. 
     
     
         5 . The method of  claim 1 , wherein the first high efficiency signaling field includes a first subfield and a second subfield, and the first high efficiency signaling field is duplicated in 20 MHz sub-channels of the PPDU. 
     
     
         6 . The method of  claim 1 , wherein the high efficiency preamble includes an indication of a combined size of the first scheduling information and the second scheduling information included in the second high efficiency signaling field. 
     
     
         7 . The method of  claim 1 , wherein the first high efficiency signaling field includes an indication of whether multi-user multiple-input and multiple-output is used to transmit the PPDU. 
     
     
         8 . The method of  claim 7 , wherein the indication indicates that full-bandwidth multi-user multiple-input and multiple-output is used to transmit the PPDU. 
     
     
         9 . The method of  claim 1 ,
 wherein the first part of the first scheduling information represents common information for all stations in the first plurality of reception stations and the second part of the first scheduling information represents station-specific information for the first plurality of reception stations to interpret the PPDU, and   wherein the first part of the second scheduling information represents common information for all stations in the second plurality of reception stations and the second part of the second scheduling information represents station-specific information for the second plurality of reception stations to interpret the PPDU.   
     
     
         10 . A method performed by a station operating in a wireless network, the method comprising:
 receiving a physical layer protocol data unit (PPDU) using a first set of frequency bands and a second set of frequency bands, the PPDU including a legacy preamble, a high efficiency preamble, and a payload, wherein the high efficiency preamble is after the legacy preamble in the PPDU and the payload is after the high efficiency preamble in the PPDU, and wherein the payload is composed of a plurality of resource units;   decoding the high efficiency preamble, including:
 decoding a first high efficiency signaling field, and 
 decoding a second high efficiency signaling field, including:
 determining first scheduling information corresponding to a first plurality of reception stations, the first scheduling information including a first part that includes first resource allocation information including a first allocation pattern for the first set of frequency bands, and a second part that includes a first list of station identifiers, including identifiers for a first plurality of reception stations, and 
 determining second scheduling information corresponding to a second plurality of reception stations different from the first plurality of reception stations, the second scheduling information including a first part, that includes second resource allocation information including a second allocation pattern for the second set of frequency bands, and a second part that includes a second list of station identifiers, including identifiers for a second plurality of reception stations; 
 
   in response to the first list of station identifiers including a station identifier corresponding to the station, receiving the payload using the first resource allocation information; and   in response to the second list of station identifiers including a station identifier corresponding to the station, receiving the payload using the second resource allocation information.   
     
     
         11 . The method of  claim 10 , wherein the legacy preamble includes a legacy short training field, a legacy long training field, and a legacy signaling field, and
 wherein the first high efficiency signaling field, the second high efficiency signaling field, and the legacy preamble have a subcarrier spacing of 312.5 kHz.   
     
     
         12 . The method of  claim 11 , wherein the PPDU includes a high efficiency short training field and one or more high efficiency long training fields, wherein the high efficiency short training field, the one or more high efficiency long training fields, and the payload have a subcarrier spacing of 78.125 kHz. 
     
     
         13 . The method of  claim 12 , wherein a number of high efficiency long training fields included in the PPDU is set based on a number of spatial streams used for the PPDU. 
     
     
         14 . The method of  claim 10 , wherein the first high efficiency signaling field includes a first subfield and a second subfield, and the first high efficiency signaling field is duplicated in 20 MHz sub-channels of the PPDU. 
     
     
         15 . The method of  claim 10 , wherein the high efficiency preamble includes an indication of a combined size of the first scheduling information and the second scheduling information included in the second high efficiency signaling field. 
     
     
         16 . The method of  claim 10 , wherein the first high efficiency signaling field includes an indication of whether multi-user multiple-input and multiple-output is used to transmit the PPDU. 
     
     
         17 . The method of  claim 16 , wherein the indication indicates that full-bandwidth multi-user multiple-input and multiple-output is used to transmit the PPDU. 
     
     
         18 . The method of  claim 10 ,
 wherein the first part of the first scheduling information represents common information for all stations in the first plurality of reception stations and the second part of the first scheduling information represents station-specific information for the first plurality of reception stations to interpret the PPDU, and   wherein the first part of the second scheduling information represents common information for all stations in the second plurality of reception stations and the second part of the second scheduling information represents station-specific information for the second plurality of reception stations to interpret the PPDU.   
     
     
         19 . A wireless device for operating in a wireless network, the wireless device comprising:
 a transmitter,   wherein the wireless device is configured to:   generate a high efficiency preamble, including a first high efficiency signaling field and a second high efficiency signaling field, wherein the second high efficiency signaling field includes first scheduling information corresponding to a first plurality of reception stations and second scheduling information corresponding to a second plurality of reception stations different from the first plurality of reception stations, wherein (1) the first scheduling information includes a first part, which includes first resource allocation information including a first allocation pattern for a first set of frequency bands, and a second part, which includes a first list of station identifiers, including identifiers for the first plurality of reception stations and (2) the second scheduling information includes a first part, which includes second resource allocation information including a second allocation pattern for a second set of frequency bands, and a second part, which includes a second list of station identifiers, including identifiers for the second plurality of reception stations;   generate a physical layer protocol data unit (PPDU) including a legacy preamble, the high efficiency preamble, and a payload, wherein the high efficiency preamble is after the legacy preamble in the PPDU and the payload is after the high efficiency preamble in the PPDU, wherein the payload is composed of a plurality of resource units; and   transmit, using the transmitter, the PPDU using the first set of frequency bands and the second set of frequency bands to the first plurality of stations and the second plurality of stations.   
     
     
         20 . The wireless device of  claim 19 ,
 wherein the first part of the first scheduling information represents common information for all stations in the first plurality of reception stations and the second part of the first scheduling information represents station-specific information for the first plurality of reception stations to interpret the PPDU, and   wherein the first part of the second scheduling information represents common information for all stations in the second plurality of reception stations and the second part of the second scheduling information represents station-specific information for the second plurality of reception stations to interpret the PPDU.