Bandwidth indication method applied in wireless local area network and communication apparatus

Abstract

This application provides a bandwidth indication method and a communication apparatus. The method includes: generating, by a communication apparatus, a physical layer protocol data unit (PPDU), wherein the PPDU comprises a universal signal (U-SIG) field and an extremely high throughput-signal (EHT-SIG) field, wherein a transmission bandwidth of the PPDU is used for non-orthogonal frequency division multiple access (OFDMA) transmission, wherein the U-SIG field indicates a number of EHT-SIG Symbols, wherein the EHT-SIG field comprises a field indicating a number of multi-user multiple-input multiple-output (MU-MIMO) users; and sending, by the communication apparatus, the PPDU to a station.

What is claimed is: 
     
         1 . A communication method applied in a wireless local area network, wherein the method comprises:
 generating, by a communication apparatus, a physical layer protocol data unit (PPDU), wherein the PPDU comprises a universal signal (U-SIG) field and an extremely high throughput-signal (EHT-SIG) field, wherein a transmission bandwidth of the PPDU is used for non-orthogonal frequency division multiple access (OFDMA) transmission, wherein the U-SIG field indicates a number of EHT-SIG Symbols, wherein the EHT-SIG field comprises a field indicating a number of multi-user multiple-input multiple-output (MU-MIMO) users; and   sending, by the communication apparatus, the PPDU to a station.   
     
     
         2 . The method according to  claim 1 , wherein the transmission bandwidth of the PPDU is divided into a plurality of segments, the PPDU comprises a plurality of EHT-SIG fields carried by the plurality of segments, and the plurality of EHT-SIG fields carry the same information. 
     
     
         3 . The method according to  claim 2 , wherein each of the plurality of segments is 80 MHz. 
     
     
         4 . The method according to  claim 1 , wherein the transmission bandwidth of the PPDU is divided into a plurality of segments, the PPDU comprises a plurality of EHT-SIG fields carried on different channels in a same segment, the plurality of EHT-SIG fields carry the same information. 
     
     
         5 . The method according to  claim 4 , wherein each channel of the different channels is 20 MHz. 
     
     
         6 . The method according to  claim 1 , wherein the EHT-SIG field does not comprise a resource unit allocation subfield. 
     
     
         7 . The method according to  claim 1 , wherein the sending, by the communication apparatus, the PPDU to the station, comprises:
 sending, by the communication apparatus, the PPDU to the station in a compression mode.   
     
     
         8 . The method according to  claim 1 , wherein the field indicating the number of MU-MIMO users is a preamble puncturing indication field. 
     
     
         9 . A communication apparatus, comprising at least one processor and at least one memory, wherein the at least one memory stores computer-executable instructions, which when executed by the at least one processor, cause the communication apparatus to perform operations comprising:
 generating a physical layer protocol data unit (PPDU), wherein the PPDU comprises a universal signal (U-SIG) field and an extremely high throughput-signal (EHT-SIG) field, wherein a transmission bandwidth of the PPDU is used for non-OFDMA transmission, wherein the U-SIG field indicates a number of EHT-SIG Symbols, wherein the EHT-SIG field comprises a field indicating a number of multi-user multiple-input multiple-output (MU-MIMO) users; and   sending the PPDU to a station.   
     
     
         10 . The communication apparatus according to  claim 9 , wherein the transmission bandwidth of the PPDU is divided into a plurality of segments, the PPDU comprises a plurality of EHT-SIG fields carried on by the plurality of segments, and the plurality of EHT-SIG fields carry the same information. 
     
     
         11 . The communication apparatus according to  claim 10 , wherein each of the plurality of segments is 80 MHz. 
     
     
         12 . The communication apparatus according to  claim 9 , wherein the transmission bandwidth of the PPDU is divided into a plurality of segments, the PPDU comprises a plurality of EHT-SIG fields carried on different channels in a same segment, and the plurality of EHT-SIG fields carry the same information. 
     
     
         13 . The communication apparatus according to  claim 12 , wherein each channel of the different channels is 20 MHz. 
     
     
         14 . The communication apparatus according to  claim 9 , wherein the EHT-SIG field does not comprise a resource unit allocation subfield. 
     
     
         15 . The communication apparatus according to  claim 9 , wherein the sending the PPDU to the station, comprises:
 sending the PPDU to the station in a compression mode.   
     
     
         16 . The communication apparatus according to  claim 9 , wherein the field indicating the number of MU-MIMO users is a preamble puncturing indication field. 
     
     
         17 . A non-transitory computer-readable storage medium, wherein the computer-readable storage medium is configured to store computer-executable instructions, and when the computer-executable instructions are executed by a computer, the computer is enabled to perform the following operations:
 generating a physical layer protocol data unit (PPDU), wherein the PPDU comprises a universal signal (U-SIG) field and an extremely high throughput-signal (EHT-SIG) field, wherein a transmission bandwidth of the PPDU is used for non-OFDMA transmission, wherein the U-SIG field indicates a number of EHT-SIG Symbols, wherein the EHT-SIG field comprises a field indicating a number of multi-user multiple-input multiple-output (MU-MIMO) users; and   sending the PPDU to a station.   
     
     
         18 . The non-transitory computer-readable storage medium according to  claim 17 , wherein the transmission bandwidth of the PPDU is divided into a plurality of segments, the PPDU comprises a plurality of EHT-SIG fields carried by the plurality of segments, and the plurality of EHT-SIG fields carry the same information. 
     
     
         19 . The non-transitory computer-readable storage medium according to  claim 18 , wherein each of the plurality of segments is 80 MHz. 
     
     
         20 . The non-transitory computer-readable storage medium according to  claim 17 , wherein the transmission bandwidth of the PPDU is divided into a plurality of segments, the PPDU comprises a plurality of EHT-SIG fields carried on different channels in a same segment, and the plurality of EHT-SIG fields carry the same information.