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US-12628132-B2 - Method and device for configuring field for instructing transmission of A-PPDU in wireless LAN system

US12628132B2US 12628132 B2US12628132 B2US 12628132B2US-12628132-B2

Abstract

Proposed are a method and device for configuring a field for instructing the transmission of 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 an HE PPDU for a primary 160 MHz channel and an EHT PPDU for a secondary 160 MHz channel. The EHT PPDU includes first and second U-SIG fields. The first U-SIG field includes a UL/DL field. The second U-SIG field includes a PPDU type and compression mode field. When the value of the UL/DL field is set to 0 and the value of the PPDU type and compression mode field is set to 3, the PPDU type and compression mode field includes information for notifying that the A-PPDU has been transmitted, and the EHT PPDU is transmitted using DL MU OFDMA.

Inventors

  • Eunsung Park
  • Jinyoung Chun
  • Jinsoo Choi
  • Dongguk Lim

Assignees

  • LG ELECTRONICS INC.

Dates

Publication Date
20260512
Application Date
20220421
Priority Date
20210514

Claims (15)

  1. 1 . A method in a wireless local area network (WLAN) system, the method comprising: receiving, by a receiving station (STA), an Aggregated-Physical Protocol Data Unit (A-PPDU) from a transmitting STA; and decoding, by the receiving STA, the A-PPDU, wherein the A-PPDU includes a High Efficiency (HE) PPDU for a primary 160 MHz channel and an Extreme High Throughput (EHT) PPDU for a secondary 160 MHz channel, wherein the EHT PPDU includes first and second Universal-Signal (U-SIG) fields, wherein the first U-SIG field includes an Uplink/Downlink (UL/DL) field, wherein the second U-SIG field includes a PPDU Type And Compression Mode field, and wherein based on a value of the UL/DL field being set to 0 and a value of the PPDU Type And Compression Mode field being set to 3, the PPDU Type And Compression Mode field includes information indicating that the A-PPDU is transmitted, and the EHT PPDU is transmitted in a Downlink Multi User Orthogonal Frequency Division Multiple Access (DL MU OFDMA) scheme.
  2. 2 . The method of claim 1 , wherein based on the value of the UL/DL field being set to 0, the A-PPDU is a Downlink (DL) PPDU, the HE PPDU is a HE Multi-User (MU) PPDU, and the EHT PPDU is an EHT MU PPDU.
  3. 3 . The method of claim 1 , wherein based on the value of the UL/DL field being set to 1 and the value of the PPDU Type And Compression Mode field being set to 2, the PPDU Type And Compression Mode field includes information indicating that the A-PPDU is transmitted, and the EHT PPDU is an EHT Trigger Based (TB) PPDU.
  4. 4 . The method of claim 3 , wherein based on the value of the UL/DL field being set to 1, the A-PPDU is an Uplink (UL) PPDU, and the HE PPDU is a HE Trigger Based (TB) PPDU.
  5. 5 . The method of claim 4 , further comprising: transmitting, by the receiving STA, a trigger frame to the transmitting STA, wherein the trigger frame is a control frame that triggers the HE TB PPDU and the EHT TB PPDU.
  6. 6 . The method of claim 1 , wherein based on the value of the UL/DL field being set to 1 and the value of the PPDU Type And Compression Mode field being set to 3, the PPDU Type And Compression Mode field includes information indicating that the A-PPDU is transmitted, and the EHT PPDU is an EHT Multi User (MU) PPDU, wherein the EHT MU PPDU is used as an EHT Single User (SU) PPDU or Null Data Packet (NDP).
  7. 7 . The method of claim 6 , wherein based on the EHT MU PPDU being used as an EHT SU PPDU, only one receiving STA is allocated to the secondary 160 MHz channel.
  8. 8 . The method of claim 1 , wherein based on the receiving STA being a Release 1 (R1) EHT STA, the R1 EHT STA is allocated only within the primary 160 MHz channel.
  9. 9 . A receiving station (STA) in a wireless local area network (WLAN) system, the receiving STA comprising: a memory; a transceiver; and a processor being operatively connected to the memory and the transceiver, wherein the processor is configured to: receive an Aggregated-Physical Protocol Data Unit (A-PPDU) from a transmitting STA; and decode the A-PPDU, wherein the A-PPDU includes a High Efficiency (HE) PPDU for a primary 160 MHz channel and an Extreme High Throughput (EHT) PPDU for a secondary 160 MHz channel, wherein the EHT PPDU includes first and second Universal-Signal (U-SIG) fields, wherein the first U-SIG field includes an Uplink/Downlink (UL/DL) field, wherein the second U-SIG field includes a PPDU Type And Compression Mode field, and wherein based on a value of the UL/DL field being set to 0 and a value of the PPDU Type And Compression Mode field being set to 3, the PPDU Type And Compression Mode field includes information indicating that the A-PPDU is transmitted, and the EHT PPDU is transmitted in a Downlink Multi User Orthogonal Frequency Division Multiple Access (DL MU OFDMA) scheme.
  10. 10 . A method in a wireless local area network (WLAN) system, the method comprising: generating, by a transmitting station (STA), an Aggregated-Physical Protocol Data Unit (A-PPDU); and transmitting, by the transmitting STA, the A-PPDU to a receiving STA, wherein the A-PPDU includes a High Efficiency (HE) PPDU for a primary 160 MHz channel and an Extreme High Throughput (EHT) PPDU for a secondary 160 MHz channel, wherein the EHT PPDU includes first and second Universal-Signal (U-SIG) fields, wherein the first U-SIG field includes an Uplink/Downlink (UL/DL) field, wherein the second U-SIG field includes a PPDU Type And Compression Mode field, and wherein based on a value of the UL/DL field being set to 0 and a value of the PPDU Type And Compression Mode field being set to 3, the PPDU Type And Compression Mode field includes information indicating that the A-PPDU is transmitted, and the EHT PPDU is transmitted in a Downlink Multi User Orthogonal Frequency Division Multiple Access (DL MU OFDMA) scheme.
  11. 11 . The method of claim 10 , wherein based on the value of the UL/DL field being set to 0, the A-PPDU is a Downlink (DL) PPDU, the HE PPDU is a HE Multi-User (MU) PPDU, and the EHT PPDU is an EHT MU PPDU.
  12. 12 . The method of claim 10 , wherein based on the value of the UL/DL field being set to 1 and the value of the PPDU Type And Compression Mode field being set to 2, the PPDU Type And Compression Mode field includes information indicating that the A-PPDU is transmitted, and the EHT PPDU is an EHT Trigger Based (TB) PPDU.
  13. 13 . The method of claim 12 , wherein based on the value of the UL/DL field being set to 1, the A-PPDU is an Uplink (UL) PPDU, and the HE PPDU is a HE Trigger Based (TB) PPDU.
  14. 14 . The method of claim 13 , further comprising: receiving, by the transmitting STA, a trigger frame from the receiving STA, wherein the trigger frame is a control frame that triggers the HE TB PPDU and the EHT TB PPDU.
  15. 15 . The method of claim 10 , wherein based on the value of the UL/DL field being set to 1 and the value of the PPDU Type And Compression Mode field being set to 3, the PPDU Type And Compression Mode field includes information indicating that the A-PPDU is transmitted, and the EHT PPDU is an EHT Multi User (MU) PPDU, wherein the EHT MU PPDU is used as an EHT Single User (SU) PPDU or Null Data Packet (NDP).

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is the National Stage filing under 35 U.S.C. 371 of International Application No. PCT/KR2022/005713, filed on Apr. 21, 2022, which claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2021-0062868, filed on May 14, 2021, the contents of which are all incorporated by reference herein in their entirety. TECHNICAL FIELD The present disclosure relates to a method for indicating transmission of an A-PPDU in a WLAN system, and more particularly, to a method and apparatus for configuring a field for indicating the transmission of the A-PPDU. BACKGROUND A wireless local area network (WLAN) has been improved in various ways. For example, the IEEE 802.11ax standard proposed an improved communication environment using orthogonal frequency division multiple access (OFDMA) and downlink multi-user multiple input multiple output (DL MU MIMO) techniques. The present specification proposes a technical feature that can be utilized in a new communication standard. For example, the new communication standard may be an extreme high throughput (EHT) standard which is currently being discussed. The EHT standard may use an increased bandwidth, an enhanced PHY layer protocol data unit (PPDU) structure, an enhanced sequence, a hybrid automatic repeat request (HARQ) scheme, or the like, which is newly proposed. The EHT standard may be called the IEEE 802.11be standard. In a new WLAN standard, an increased number of spatial streams may be used. In this case, in order to properly use the increased number of spatial streams, a signaling technique in the WLAN system may need to be improved. SUMMARY The present specification proposes a method and apparatus for configuring a field for indicating transmission of an A-PPDU in a wireless LAN system. An example of the present specification proposes a method for configuring a field for indicating transmission of an A-PPDU. The present embodiment may be performed in a network environment in which a next generation WLAN system (IEEE 802.11be or EHT WLAN system) is supported. The next generation wireless LAN system is a WLAN system that is enhanced from an 802.11ax system and may, therefore, satisfy backward compatibility with the 802.11ax system. This embodiment is performed by a receiving station (STA), and the receiving STA may correspond to a non-access point (non-AP) STA or an AP STA depending on whether the A-PPDU is a UL PPDU or a DL PPDU. Depending on the transmitting STA, the receiving STA may correspond to an AP STA or a non-AP STA. This embodiment proposes a method for indicating that an A-PPDU in which HE PPDU and EHT PPDU are aggregated is transmitted through the UL/DL field and PPDU Type And Compression Mode field included in the U-SIG field of the EHT PPDU. A receiving station (STA) receives an Aggregated-Physical Protocol Data Unit (A-PPDU) from a transmitting STA. The receiving STA decodes the A-PPDU. The A-PPDU includes a High Efficiency (HE) PPDU for a primary 160 MHz channel and an Extreme High Throughput (EHT) PPDU for a secondary 160 MHz channel. The EHT PPDU includes first and second Universal-Signal (U-SIG) fields. The first U-SIG field includes an Uplink/Downlink (UL/DL) field. The second U-SIG field includes a PPDU Type And Compression Mode field. When a value of the UL/DL field is set to 0 and a value of the PPDU Type And Compression Mode field is set to 3, the PPDU Type And Compression Mode field includes information indicating that the A-PPDU is transmitted, and the EHT PPDU is transmitted in the Downlink Multi User Orthogonal Frequency Division Multiple Access (DL MU OFDMA) scheme. When the value of the UL/DL field is set to 0, the A-PPDU may be a Downlink (DL) PPDU, the HE PPDU may be a HE Multi-User (MU) PPDU, and the EHT PPDU may be an EHT MU PPDU. {001-7} That is, this embodiment proposes a method for indicating the transmission of the A-PPDU based on a specific value of the PPDU Type And Compression Mode field previously defined as validate. When the value of the UL/DL field is set to 0 and the value of the PPDU Type And Compression Mode field is set to 3, it can be notified that the A-PPDU is transmitted, and the EHT MU PPDU included in the A-PPDU may be transmitted in the DL MU OFDMA scheme. According to the embodiment proposed in this specification, by indicating the bandwidth of the HE PPDU and EHT PPDU constituting the A-PPDU, efficient support of HE STA and EHT STA is possible. Since the AP allocates the R1 EHT STA only within the primary 160 MHz channel, there is no need to assign the R1 EHT STA to another channel through SST operation, etc., which can also have the advantage in terms of complexity of implementation. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an example of a transmitting apparatus and/or receiving apparatus of the present specification. FIG. 2 is a conceptual view illustrating the structure of a wireless local area network (WLAN). FIG. 3