KR-20260066758-A - Method and device for transmitting or receiving based on a distributed resource unit tone plan in a wireless LAN system

Abstract

A method and apparatus for transmitting or receiving based on a distributed resource unit tone plan in a wireless LAN system are disclosed. A method performed by a first STA in a wireless local area network (WLAN) system according to one embodiment of the present disclosure comprises: receiving a trigger frame containing a common information field and a special user information field by the first station (STA) from an access point (AP); and transmitting a trigger-based (TB) physical layer protocol data unit (PPDU) on a first bandwidth by the first STA to the AP based on the trigger frame, wherein the common information field or the special user information field transmitted in a second bandwidth of the first bandwidth may include a first subfield related to whether a distributed resource unit (DRU) is applied on the second bandwidth.

Inventors

• 박은성
• 천진영
• 최진수
• 임동국
• 정인식

Assignees

• 엘지전자 주식회사

Dates

Publication Date

20260512

Application Date

20240925

Priority Date

20231005

Claims (15)

1. A step of receiving a trigger frame containing common information fields and special user information fields from an access point (AP) by a first station (STA); and The method includes the step of transmitting a trigger-based (TB) physical layer protocol data unit (PPDU) to the AP by the first STA based on the above trigger frame. A method wherein the common information field or the special user information field transmitted in the second bandwidth among the first bandwidths comprises a first subfield related to whether a distributed resource unit (DRU) is applied on the second bandwidth.
2. The common information field or the special user information field transmitted in the third bandwidth among the first bandwidths includes a second subfield related to whether a DRU is applied on the third bandwidth, and A method in which the sizes of the first subfield and the second subfield are the same.
3. In paragraph 2, The above first subfield includes a first bitmap, and A method in which whether a DRU is applied to the n-th unit bandwidth of the second bandwidth is indicated by n bits (n is a natural number greater than or equal to 1) of the first bitmap.
4. In paragraph 3, A method in which the size of each of the above unit bandwidths is one of 20 MHz, 40 MHz, 80 MHz, or 160 MHz.
5. In paragraph 1, A method wherein the common information field or the special user information field transmitted in the second bandwidth among the first bandwidths comprises a third subfield related to a distributed width (DBW) mode applied to the second bandwidth.
6. In paragraph 5, A method in which the third subfield is reserved based on the indication that the DRU is not applied to the second bandwidth by the first subfield.
7. In paragraph 5, The value indicating the 20 + 20 + 40 MHz DBW mode set on the third subfield above is used for the 20 + 20 + 40 MHz DBW mode, P(puncturing)20 + 20 + 40 MHz DBW mode, 20 + P20 + 40 MHz DBW mode, P40 + 40 MHz DBW mode, or 20 + 20 + P40 MHz DBW mode, and A method in which a value indicating a 40 + 20 + 20 MHz DBW mode set on the third subfield is used for a 40 + 20 + 20 MHz DBW mode, a 40 + P20 + 20 MHz DBW mode, a 40 + 20 + P20 MHz DBW mode, a 40 + P40 MHz DBW mode, or a P40 + 20 + 20 MHz DBW mode, depending on the channel puncturing situation within the second bandwidth.
8. In paragraph 5, The common information field or the special user information field transmitted in the third bandwidth among the first bandwidths includes a fourth subfield related to the DBW mode applied to the third bandwidth, and A method in which the sizes of the third subfield and the fourth subfield are each the same.
9. In paragraph 8, The value indicating the 20 + 20 + 40 MHz DBW mode set on the fourth subfield above is used for the 20 + 20 + 40 MHz DBW mode, P20 + 20 + 40 MHz DBW mode, 20 + P20 + 40 MHz DBW mode, P40 + 40 MHz DBW mode, or 20 + 20 + P40 MHz DBW mode, and A value indicating a 40 + 20 + 20 MHz DBW mode set on the fourth subfield above is a method used for a 40 + 20 + 20 MHz DBW mode, a 40 + P20 + 20 MHz DBW mode, a 40 + 20 + P20 MHz DBW mode, a 40 + P40 MHz DBW mode, or a P40 + 20 + 20 MHz DBW mode.
10. In paragraph 1, A method in which the bandwidth size of the PPDU including the above trigger frame is the same as the size of the first bandwidth.
11. In the first STA, the first STA is: One or more transceivers; and It includes one or more processors connected to the above one or more transmitters and receivers, and The above one or more processors are: Receiving a trigger frame containing common information fields and special user information fields from an access point (AP) through one or more transceivers; and Based on the above trigger frame, a trigger-based (TB) physical layer protocol data unit (PPDU) is configured to be transmitted to the AP through the one or more transceivers, and The common information field or the special user information field transmitted in the second bandwidth among the first bandwidths comprises a first STA including a first subfield related to whether a distributed resource unit (DRU) is applied on the second bandwidth.
12. A step of transmitting a trigger frame containing common information fields and special user information fields to a first station (STA) by an access point (AP); and The method includes the step of receiving a trigger-based (TB) physical layer protocol data unit (PPDU) from the first STA to the AP based on the above trigger frame on the first bandwidth. A method wherein the common information field or the special user information field transmitted in the second bandwidth among the first bandwidths comprises a first subfield related to whether a distributed resource unit (DRU) is applied on the second bandwidth.
13. In the case of an access point (AP), the AP is: One or more transceivers; and It includes one or more processors connected to the above one or more transmitters and receivers, and The above one or more processors are: Transmitting a trigger frame containing a common information field and a special user information field to a first station (STA) through one or more transceivers; and Based on the above trigger frame, a trigger-based (TB) physical layer protocol data unit (PPDU) is configured to be received from the first STA through the one or more transceivers on the first bandwidth, and The common information field or the special user information field transmitted in the second bandwidth among the first bandwidths includes a first subfield related to whether a distributed resource unit (DRU) is applied on the second bandwidth, AP.
14. In a processing device configured to control a first station (STA) in a wireless local area network (WLAN) system, the processing device: One or more processors; and A processing device comprising one or more computer memories that are operably connected to one or more processors and store instructions for performing a method according to any one of claims 1 to 10 based on execution by one or more processors.
15. One or more non-transitory computer-readable media storing one or more instructions, A computer-readable medium in which one or more of the above commands are executed by one or more processors to control a device in a wireless LAN system to perform a method according to any one of claims 1 to 10.

Description

Method and device for transmitting or receiving based on distributed resource unit tone plan in a wireless LAN system The present disclosure relates to a transmission or reception method and apparatus based on a distributed resource unit tone plan in a Wireless Local Area Network (WLAN) system. New technologies have been introduced for wireless LANs (WLANs) to improve transmission rates, increase bandwidth, enhance reliability, reduce errors, and reduce latency. Among wireless LAN technologies, the IEEE (Institute of Electrical and Electronics Engineers) 802.11 series of standards can be referred to as Wi-Fi. For example, technologies recently introduced to wireless LANs include enhancements for Very High-Throughput (VHT) in the 802.11ac standard and enhancements for High Efficiency (HE) in the IEEE 802.11ax standard. To provide an improved wireless communication environment, advanced technologies for Extremely High Throughput (EHT) are being discussed. For example, technologies for Multiple Input Multiple Output (MIMO) supporting increased bandwidth, efficient utilization of multiple bands, and increased spatial streams, as well as technologies for multiple access points (AP) coordination, are being researched. In particular, various technologies are being studied to support traffic with low latency or real-time characteristics. Furthermore, new technologies to support ultra-high reliability (UHR), including improvements or extensions of EHT technology, are being discussed. The accompanying drawings, which are included as part of the detailed description to aid in understanding the present disclosure, provide embodiments of the present disclosure and explain the technical features of the present disclosure together with the detailed description. FIG. 1 illustrates a block diagram of a wireless communication device according to one embodiment of the present disclosure. FIG. 2 is a drawing showing an exemplary structure of a wireless LAN system to which the present disclosure can be applied. FIG. 3 is a diagram illustrating a link setup process to which the present disclosure can be applied. FIG. 4 is a drawing illustrating a backoff process to which the present disclosure may be applied. FIG. 5 is a diagram illustrating a CSMA/CA-based frame transmission operation to which the present disclosure may be applied. FIG. 6 is a drawing for illustrating an example of a frame structure used in a wireless LAN system to which the present disclosure may be applied. FIG. 7 is a drawing illustrating examples of PPDUs defined in the IEEE 802.11 standard to which the present disclosure may be applied. FIGS. 8 to 10 are drawings for illustrating examples of resource units of a wireless LAN system to which the present disclosure may be applied. FIG. 11 is a drawing for illustrating examples of DRUs to which the present disclosure may be applied. FIG. 12 is a drawing showing an exemplary format of a trigger frame to which the present disclosure can be applied. FIG. 13 is a drawing for illustrating an example of a method performed by a first STA according to the present disclosure. FIG. 14 is a drawing for illustrating an example of a method performed by an AP according to the present disclosure. FIG. 15 is a diagram illustrating a PPDU transmission and reception procedure between a transmitting STA and a receiving STA according to an example of the present disclosure. Hereinafter, preferred embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of the present disclosure and is not intended to represent the only embodiment in which the present disclosure may be practiced. The following detailed description includes specific details to provide a complete understanding of the present disclosure. However, those skilled in the art will know that the present disclosure may be practiced without such specific details. In some cases, to avoid obscuring the concept of the present disclosure, known structures and devices may be omitted or illustrated in the form of a block diagram focusing on the core functions of each structure and device. In the present disclosure, when a component is described as being “connected,” “combined,” or “joined” with another component, this may include not only a direct connection but also an indirect connection in which another component exists between them. Furthermore, in the present disclosure, the terms “comprising” or “having” specify the presence of the mentioned features, steps, actions, elements, and/or components, but do not exclude the presence or addition of one or more other features, steps, actions, elements, components, and/or groups thereof. In the present disclosure, terms such as "first," "second," etc. are used solely for the purpose of distinguishing one component from another and are not use