Method and apparatus for allocating resources by restricting RUs and MRUs for STAs operating only at 20 MHz in a wireless LAN system

Abstract

A method and apparatus for configuring restricted RUs and MRUs in a wireless LAN system are presented. Specifically, a receiving STA receives a PPDU from a transmitting STA via a preset frequency band and decodes the PPDU. The receiving STA is a STA that operates only at a 20 MHz band. The PPDU includes a preamble and a data field. The data field is received from resources in the preset frequency band other than a first RU and a first MRU.

Description

Technical Field

[0001] This specification relates to a method for performing allocation by restricting resources in a WLAN system, and more particularly, to a method and apparatus for allocating resources in a WLAN system by restricting RUs and MRUs for stations (STAs) operating only in the 20 MHz band. Background Art

[0002] Wireless Local Area Networks (WLANs) have been improved in various ways. For example, the IEEE 802.11ax standard proposes an improved communication environment using Orthogonal Frequency Division Multiple Access (OFDMA) and Downlink Multi-User Multiple-Input Multiple-Output (DL MU MIMO) techniques.

[0003] This specification presents technical features that can be utilized in new communication standards. For example, the new communication standard can be the Extremely High Throughput (EHT) standard currently under discussion. The EHT standard can use newly proposed increased bandwidth, enhanced Physical Layer Protocol Data Unit (PPDU) structures, enhanced sequences, Hybrid Automatic Repeat reQuest (HARQ) schemes, etc. The EHT standard can be referred to as the IEEE 802.11be standard.

[0004] In new wireless LAN standards, an increased number of spatial streams may be used. In this case, in order to appropriately use the increased number of spatial streams, it may be necessary to improve the signaling technology in the WLAN system. Summary of the Invention

[0005] Technical Problem

[0006] This specification presents a method and apparatus for allocating resources in a Wireless Local Area Network (WLAN) system by restricting RUs and MRUs for STAs operating only in the 20 MHz band.

[0007] Technical Solution

[0008] An example of this specification presents a method for allocating resources by restricting RUs and MRUs for STAs operating only in the 20 MHz band.

[0009] This embodiment can be executed in a network environment supporting a next-generation WLAN system. The next-generation wireless LAN system is a WLAN system enhanced from the 802.11ax system and can thus satisfy backward compatibility with the 802.11ax system.

[0010] This embodiment can be executed by a receiving station (STA), and the receiving STA can correspond to a non-AP STA operating only in the 20 MHz band. The transmitting STA can correspond to an access point (AP) STA.

[0011] This embodiment proposes a method for configuring resource units (RUs) and multiple resource units (MRUs) that cannot be allocated (restricted (or constrained) for allocation) to stations (STAs) operating only in the 20 MHz band based on the newly defined 80 MHz band tone plan in an 802.11be WLAN system.

[0012] A receiving station (STA) receives a physical protocol data unit (PPDU) from a transmitting STA via a preset frequency band.

[0013] The receiving STA decodes the PPDU.

[0014] The receiving STA is an STA operating only in the 20 MHz band.

[0015] The PPDU includes a preamble and a data field. Moreover, the data field is received via resources other than the first resource unit (RU) and the first multiple RUs (MRUs) among the preset frequency bands. The first MRU is newly defined in the 802.11be wireless LAN system as multiple RUs in which 2 RUs are aggregated.

[0016] When the preset frequency band is the 40 MHz band, the RU layout (or tone plan) for the 40 MHz band is described as follows. The tone plan for the 40 MHz band is the same in 802.11ax and 802.11be WLAN systems.

[0017] When the 40 MHz band consists only of 26-tone RUs, the 40 MHz band includes the 1st to 18th 26-tone RUs. When the 40 MHz band consists only of 52-tone RUs, the 40 MHz band includes the 1st to 8th 52-tone RUs. When the 40 MHz band consists only of 106-tone RUs, the 40 MHz band includes the 1st to 4th 106-tone RUs. And when the 40 MHz band consists only of 242-tone RUs, the 40 MHz band includes the 1st and 2nd 242-tone RUs.

[0018] At this time, the 1st to 18th 26-tone RUs can be arranged in the order from the 26-tone RU with a lower frequency to the 26-tone RU with a higher frequency. The 1st to 8th 52-tone RUs can be arranged in the order from the 52-tone RU with a lower frequency to the 52-tone RU with a higher frequency. The 1st to 4th 106-tone RUs can be arranged in the order from the 106-tone RU with a lower frequency to the 106-tone RU with a higher frequency. And the first and second 242-tone RUs can be arranged in the order from the 242-tone RU with a lower frequency to the 242-tone RU with a higher frequency.

[0019] The first RU includes the 5th and 14th 26-tone RUs and the first and second 242-tone RUs. That is, the 5th and 14th 26-tone RUs and the first and second 242-tone RUs correspond to resources not allocated to the receiving STA.

[0020] The first MRU includes: an MRU aggregating the 5th 26-tone RU and the 2nd 52-tone RU, an MRU aggregating the 14th 26-tone RU and the 6th 52-tone RU, an MRU aggregating the 5th 26-tone RU and the 1st 106-tone RU, an MRU aggregating the 5th 26-tone RU and the 2nd 106-tone RU, an MRU aggregating the 14th 26-tone RU and the 3rd 106-tone RU, and an MRU aggregating the 14th 26-tone RU and the 4th 106-tone RU. That is, the multiple RUs included in the first MRU also correspond to resources not allocated to the receiving STA.

[0021] This embodiment proposes a method according to which, when the receiving STA receives an OFDMA PPDU through a 40 MHz band, the receiving STA is only allocated the remaining units (RUs) except for the first RU and the first MRU.

[0022] Beneficial effects

[0023] According to the embodiment proposed in this specification, the present disclosure can have a new effect of being able to prevent the performance degradation and interference of adjacent channels by preventing data from being loaded on the tones corresponding to the DC tones and protection tones in the 20 MHz band where the receiving STA can operate. Therefore, the present disclosure can also have the effect of increasing the total throughput of the STA operating only in the 20 MHz band. Description of the drawings

[0024] Figure 1 Shows an example of the transmitting device and / or receiving device of this specification.

[0025] Figure 2 Is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0026] Figure 3 Illustrates a general link setup process.

[0027] Figure 4 Illustrates an example of a PPDU used in the IEEE standard.

[0028] Figure 5 Is a diagram illustrating the layout of resource units (RUs) used in a 20 MHz band.

[0029] Figure 6 Is a diagram illustrating the layout of resource units (RUs) used in a 40 MHz band.

[0030] Figure 7 It is a layout of resource units (RUs) used in the 80 MHz band.

[0031] Figure 8 It illustrates the structure of the HE-SIG-B field.

[0032] Figure 9 It illustrates an example of allocating multiple user STAs to the same RU through MU-MIMO technology.

[0033] Figure 10 It illustrates an example of the PPDU used in the present disclosure.

[0034] Figure 11 It illustrates a modified example of the transmitting device and / or receiving device of this specification.

[0035] Figure 12 It illustrates the tone plan for the 80 MHz PPDU in the 802.11be WLAN system.

[0036] Figure 13 It illustrates an example of an RU that cannot be allocated to only 20 MHz or an operating STA during 40 MHz PPDU transmission.

[0037] Figure 14 It illustrates examples of the 26+52-tone MRU and 26+106-tone MRU used in 20 MHz EHT PPDU OFDMA transmission.

[0038] Figure 15 It illustrates examples of the 26+52-tone MRU and 26+106-tone MRU used in 40 MHz EHT PPDU OFDMA transmission.

[0039] Figure 16 It illustrates an example of the 26+52-tone MRU used in 80 MHz EHT PPDU OFDMA transmission.

[0040] Figure 17 It illustrates an example of the 26+106-tone MRU used in 80 MHz EHT PPDU OFDMA transmission.

[0041] Figure 18 It is a process flow chart showing the operation of the transmitting device according to this embodiment.

[0042] Figure 19 It is a process flow chart showing the operation of the receiving device according to this embodiment.

[0043] Figure 20It is a flowchart showing the process of allocation performed by an AP by restricting the RUs or MRUs of STAs operating only in the 20 MHz band according to the present embodiment.

[0044] Figure 21 It is a flowchart showing the process of receiving allocation by an STA operating only in the 20 MHz band by restricting the RUs or MRUs according to the present embodiment. Detailed implementation

[0045] In this specification, "A or B" may mean "only A", "only B", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B, or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0046] The slashes ( / ) or commas used in this specification may mean "and / or". For example, "A / B" may mean "A and / or B". Therefore, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0047] In this specification, "at least one of A and B" may mean "only A", "only B", or "both A and B". Additionally, in this specification, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0048] Furthermore, in this specification, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". Additionally, "at least one of A, B, or C" or "at least one of A, B, and / or C" may mean "at least one of A, B, and C".

[0049] Moreover, the parentheses used in this specification may mean "for example". Specifically, when indicated as "control information (EHT-signal)", it may mean that "EHT-signal" is proposed as an example of "control information". In other words, the "control information" in this specification is not limited to "EHT-signal", and "EHT-signal" may be presented as an example of "control information". Additionally, when indicated as "control information (i.e., EHT-signal)", it may also mean that "EHT-signal" is proposed as an example of "control information".

[0050] The technical features described separately in one drawing of this specification may be implemented separately or may be implemented simultaneously.

[0051] The following examples of this specification can be applied to various wireless communication systems. For example, the following examples of this specification can be applied to a wireless local area network (WLAN) system. For example, this specification can be applied to the IEEE 802.11a / g / n / ac standards or the IEEE 802.11ax standard. Additionally, this specification can also be applied to the newly proposed EHT standard or the IEEE 802.11be standard. Furthermore, the examples of this specification can also be applied to a new WLAN standard enhanced from the EHT standard or the IEEE 802.11be standard. Additionally, the examples of this specification can be applied to a mobile communication system. For example, it can be applied to a long-term evolution (LTE) based on the 3rd Generation Partnership Project (3GPP) standard and a mobile communication system evolved from LTE. Additionally, the examples of this specification can be applied to a communication system based on the 5G NR standard of the 3GPP standard.

[0052] Hereinafter, in order to describe the technical features of this specification, the technical features applicable to this specification will be described.

[0053] Figure 1 Examples of the transmitting device and / or receiving device of this specification are shown.

[0054] In Figure 1 the examples of, various technical features described below can be performed. Figure 1 It relates to at least one station (STA). For example, the STAs 110 and 120 of this specification can also be referred to by various terms such as a mobile terminal, a wireless device, a wireless transmit / receive unit (WTRU), a user equipment (UE), a mobile station (MS), a mobile subscriber unit, or simply as a user. The STAs 110 and 120 of this specification can also be referred to by various terms such as a network, a base station, a Node B, an access point (AP), a repeater, a router, a repeater, etc. The STAs 110 and 120 of this specification can also be referred to by various names such as a receiving device, a transmitting device, a receiving STA, a transmitting STA, a receiving device, a transmitting device, etc.

[0055] For example, the STAs 110 and 120 can be used as an AP or a non-AP. That is, the STAs 110 and 120 of this specification can be used as an AP and / or a non-AP. In this specification, an AP can be indicated as an AP STA.

[0056] In addition to the IEEE 802.11 standard, the STAs 110 and 120 of this specification can support various communication standards together. For example, communication standards based on 3GPP standards (e.g., LTE, LTE-A, 5G NR standards) etc. can be supported. Additionally, the STAs of this specification can be implemented as various devices such as mobile phones, vehicles, personal computers, etc. Additionally, the STAs of this specification can support communication for various communication services such as voice calls, video calls, data communication, and self-driving (autonomous driving).

[0057] The STAs 110 and 120 of this specification can include a media access control (MAC) conforming to the IEEE 802.11 standard and a physical layer interface for the radio medium.

[0058] Reference will be made below to Figure 1 subfigure (a) to describe the STAs 110 and 120.

[0059] The first STA 110 can include a processor 111, a memory 112, and a transceiver 113. The illustrated processor, memory, and transceiver can be implemented separately as separate chips, or at least two blocks / functions can be implemented through a single chip.

[0060] The transceiver 113 of the first STA performs signal transmission / reception operations. Specifically, IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be, etc.) can be transmitted / received.

[0061] For example, the first STA 110 can perform operations expected of an AP. For example, the processor 111 of the AP can receive a signal through the transceiver 113, process the received (RX) signal, generate a transmitted (TX) signal, and provide control for signal transmission. The memory 112 of the AP can store the signal received through the transceiver 113 (e.g., RX signal), and can store the signal to be transmitted through the transceiver (e.g., TX signal).

[0062] For example, the second STA 120 can perform operations expected of a non-AP STA. For example, the transceiver 123 of the non-AP performs signal transmission / reception operations. Specifically, IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be packets, etc.) can be transmitted / received.

[0063] For example, the processor 121 of the non-AP STA can receive signals through the transceiver 123, process the RX signals, generate TX signals, and provide control for signal transmission. The memory 122 of the non-AP STA can store the signals received through the transceiver 123 (e.g., RX signals), and can store the signals to be transmitted through the transceiver (e.g., TX signals).

[0064] For example, the operations of the device indicated as an AP in the following-described specification can be performed in the first STA 110 or the second STA 120. For example, if the first STA 110 is an AP, the operations of the device indicated as an AP can be controlled by the processor 111 of the first STA 110, and the relevant signals can be transmitted or received through the transceiver 113 controlled by the processor 111 of the first STA 110. Additionally, the control information related to the operations of the AP or the TX / RX signals of the AP can be stored in the memory 112 of the first STA 110. Additionally, if the second STA 120 is an AP, the operations of the device indicated as an AP can be controlled by the processor 121 of the second STA 120, and the relevant signals can be transmitted or received through the transceiver 123 controlled by the processor 121 of the second STA 120. Additionally, the control information related to the operations of the AP or the TX / RX signals of the AP can be stored in the memory 122 of the second STA 120.

[0065] For example, in the following-described specification, the operations of the device indicated as a non-AP (or user STA) can be performed in the first STA 110 or the second STA 120. For example, if the second STA 120 is a non-AP, the operations of the device indicated as a non-AP can be controlled by the processor 121 of the second STA 120, and the relevant signals can be transmitted or received through the transceiver 123 controlled by the processor 121 of the second STA 120. Additionally, the control information related to the operations of the non-AP or the TX / RX signals of the non-AP can be stored in the memory 122 of the second STA 120. For example, if the first STA 110 is a non-AP, the operations of the device indicated as a non-AP can be controlled by the processor 111 of the first STA 110, and the relevant signals can be transmitted or received through the transceiver 113 controlled by the processor 111 of the first STA 110. Additionally, the control information related to the operations of the non-AP or the TX / RX signals of the non-AP can be stored in the memory 112 of the first STA 110.

[0066] In the following description of the specification, devices such as (transmitting / receiving) STAs, first STAs, second STAs, STA1, STA2, APs, first APs, second APs, AP1, AP2, (transmitting / receiving) terminals, (transmitting / receiving) devices, (transmitting / receiving) apparatuses, networks, etc. may imply Figure 1 STAs 110 and 120 of Figure 1 For example, devices such as (but without specific reference numbers) (transmitting / receiving) STAs, first STAs, second STAs, STA1, STA2, APs, first APs, second APs, AP1, AP2, (transmitting / receiving) terminals, (transmitting / receiving) devices, (transmitting / receiving) apparatuses, networks, etc. may imply Figure 1 STAs 110 and 120 of Figure 1 For example, in the following examples, operations of various STAs for transmitting / receiving signals (e.g., PPDUs) may be performed in Figure 1 transceivers 113 and 123 of

[0067] Figure 1 The aforementioned device / STA in sub - figure (a) of Figure 1 may be modified as shown in sub - figure (b) of Figure 1 In the following, STAs 110 and STA120 of this specification will be described based on

[0068] For example, Figure 1The transceivers 113 and 123 shown in sub - figure (b) of Figure 1 can perform the same functions as the aforementioned transceivers shown in sub - figure (a) of Figure 1 . For example, Figure 1 the processing chips 114 and 124 shown in sub - figure (b) of Figure 1 can include processors 111 and 121 and memories 112 and 122.

[0069] The mobile terminals, wireless devices, wireless transmit / receive units (WTRUs), user equipments (UEs), mobile stations (MSs), mobile subscriber units, users, user STAs, networks, base stations, Node Bs, access points (APs), repeaters, routers, relays, receiving units, transmitting units, receiving STAs, transmitting STAs, receiving devices, transmitting devices, receiving apparatuses and / or transmitting apparatuses described below can mean Figure 1 the STAs 110 and 120 shown in sub - figure (a) / (b) of Figure 1 , or can mean Figure 1 the processing chips 114 and 124 shown in sub - figure (b) of Figure 1 . That is, the technical features of this specification can be executed in the STAs 110 and 120 shown in sub - figure (a) / (b) of Figure 1 , or can be executed only in the processing chips 114 and 124 shown in sub - figure (b) of Figure 1 the transceivers 113 and 123 shown in sub - figure (a) / (b) of Figure 1 . For example, the technical feature that the transmitting STA transmits a control signal can be understood as the technical feature of transmitting, through the transceivers 113 shown in sub - figure (a) / (b) of Figure 1 , the control signal generated in the processors 111 and 121 shown in sub - figure (a) / (b) of

[0070] . Alternatively, the technical feature that the transmitting STA transmits a control signal can be understood as the technical feature of generating, in the processing chips 114 and 124 shown in sub - figure (b) of Figure 1 , the control signal to be transmitted to the transceivers 113 and 123. Figure 1 For example, the technical feature that the receiving STA receives a control signal can be understood as the technical feature of receiving the control signal through the transceivers 113 and 123 shown in sub - figure (a) of Figure 1The technical features of the control signals received in transceivers 113 and 123 shown in sub - figure (a). Alternatively, the technical features of the control signals received by the receiving STA can be understood as obtained by Figure 1 processing chips 114 and 124 shown in sub - figure (b) of Figure 1 The technical features of the control signals received in transceivers 113 and 123 shown in sub - figure (b).

[0071] Refer to Figure 1 In sub - figure (b) of, software codes 115 and 125 can be included in memories 112 and 122. Software codes 115 and 125 can include instructions for controlling the operations of processors 111 and 121. Software codes 115 and 125 can be included in various programming languages.

[0072] Figure 1 Processors 111 and 121 or processing chips 114 and 124 of can include application - specific integrated circuits (ASICs), other chip sets, logic circuits, and / or data - processing devices. The processor can be an application processor (AP). For example, Figure 1 Processors 111 and 121 or processing chips 114 and 124 of can include at least one of the following: digital signal processors (DSPs), central processing units (CPUs), graphics processing units (GPUs), and modulators and demodulators (modems). For example, Figure 1 Processors 111 and 121 or processing chips 114 and 124 of can be manufactured SNAPDRAGONTM series processors, manufactured EXYNOSTM series processors, manufactured A series processors, manufactured HELIOTM series processors, manufactured ATOMTM series processors, or processors enhanced from these processors.

[0073] In this specification, the uplink can mean a link for communication from a non - AP STA to an SP STA, and an uplink PPDU / packet / signal, etc. can be sent through the uplink. Additionally, in this specification, the downlink can mean a link for communication from an AP STA to a non - AP STA, and a downlink PPDU / packet / signal, etc. can be sent through the downlink.

[0074] Figure 2 is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0075] Figure 2The upper part shows the structure of an infrastructure basic service set (BSS) of the Institute of Electrical and Electronics Engineers (IEEE) 802.11.

[0076] Reference Figure 2 In the upper part of, a wireless LAN system may include one or more infrastructure BSSs 200 and 205 (hereinafter referred to as BSSs). A BSS 200 and 205, which is a set of APs and STAs (e.g., access point (AP) 225 and station (STA1) 200-1) that have successfully synchronized to communicate with each other, is not a concept indicating a specific area. BSS 205 may include one or more STAs 205-1 and 205-2 that can be associated with one AP 230.

[0077] A BSS may include at least one STA, an AP that provides distributed services, and a distributed system (DS) 210 that connects multiple APs.

[0078] The distributed system 210 can implement an extended service set (ESS) 240 that is extended by connecting multiple BSSs 200 and 205. The ESS 240 can be used as a term indicating a network configured by connecting one or more APs 225 or 230 via the distributed system 210. The APs included in one ESS 240 may have the same service set identifier (SSID).

[0079] The portal 220 can be used as a bridge to connect a wireless LAN network (IEEE 802.11) and another network (e.g., 802.X).

[0080] In Figure 2 In the BSS shown in the upper part of, a network between APs 225 and 230 and a network between APs 225 and 230 and STAs 200-1, 205-1, and 205-2 can be implemented. However, a network is configured between STAs to perform communication even in the absence of APs 225 and 230. A network that performs communication by configuring a network between STAs even in the absence of APs 225 and 230 is defined as an ad hoc network or an independent basic service set (IBSS).

[0081] Figure 2 The lower part shows a conceptual diagram illustrating an IBSS.

[0082] Reference Figure 2At the lower part of, an IBSS is a BSS operating in an ad-hoc mode. Since an IBSS does not include an access point (AP), there is no centralized management entity that performs management functions at the center. That is, in an IBSS, STAs 250-1, 250-2, 250-3, 255-4, and 255-5 are managed in a distributed manner. In an IBSS, all STAs 250-1, 250-2, 250-3, 255-4, and 255-5 can be composed of mobile STAs, and access to the DS is not allowed to form a self-contained network.

[0083] Figure 3 The figure illustrates a general link establishment process.

[0084] In S310, an STA can perform a network discovery operation. The network discovery operation can include a scanning operation of the STA. That is, in order to access the network, the STA needs to discover the participating network. The STA needs to identify a compatible network before joining the wireless network, and the process of identifying the networks existing in a specific area is called scanning. Scanning methods include active scanning and passive scanning.

[0085] Figure 3 The figure illustrates a network discovery operation including an active scanning process. In active scanning, the STA performing the scanning sends a probe request frame and waits for a response to the probe request frame in order to identify which APs exist around while moving to channels. The responder sends a probe response frame to the STA that has sent the probe request frame as a response to the probe request frame. Here, the responder can be the STA that sent the last beacon frame in the BSS of the channel being scanned. In a BSS, since the AP sends the beacon frame, the AP is the responder. In an IBSS, since the STAs in the IBSS send beacon frames in turn, the responder is not fixed. For example, when an STA sends a probe request frame via channel 1 and receives a probe response frame via channel 1, the STA can store the BSS-related information included in the received probe response frame, move to the next channel (e.g., channel 2), and can perform scanning by the same method (e.g., send a probe request and receive a probe response via channel 2).

[0086] Although Figure 3is not shown and the scanning can be performed by a passive scanning method. In passive scanning, the STA performing the scanning can wait for beacon frames while moving to channels. A beacon frame is one of the management frames in IEEE 802.11 and is periodically transmitted to indicate the presence of a wireless network and enable the STA performing the scanning to find and join the wireless network. In a BSS, the AP is used to periodically transmit beacon frames. In an IBSS, the STAs in the IBSS take turns to transmit beacon frames. When receiving a beacon frame, the STA performing the scanning stores the information about the BSS included in the beacon frame and records the beacon frame information in each channel while moving to another channel. The STA that receives the beacon frame can store the BSS-related information included in the received beacon frame, move to the next channel, and perform scanning in the next channel by the same method.

[0087] After discovering the network, the STA can perform an authentication process in S320. This authentication process can be referred to as the first authentication process to clearly distinguish it from the security establishment operation in S340 subsequently. The authentication process in S320 can include the process of the STA sending an authentication request frame to the AP and the AP sending an authentication response frame to the STA as a response. The authentication frame for authentication request / response is a management frame.

[0088] The authentication frame can include information about the authentication algorithm number, authentication transaction sequence number, status code, challenge text, Robust Security Network (RSN), and finite cyclic group.

[0089] The STA can send an authentication request frame to the AP. The AP can determine whether to allow the authentication of the STA based on the information included in the received authentication request frame. The AP can provide the authentication processing result to the STA via the authentication response frame.

[0090] When the STA is successfully authenticated, the STA can perform an association process in S330. The association process includes the process of the STA sending an association request frame to the AP and the AP sending an association response frame to the STA as a response. For example, the association request frame can include information about various capabilities, beacon listening interval, Service Set Identifier (SSID), supported rates, supported channels, RSN, mobility domain, supported operation classes, Traffic Indication Map (TIM) broadcast request, and interworking service capabilities. For example, the association response frame can include information about various capabilities, status code, Association ID (AID), supported rates, Enhanced Distributed Channel Access (EDCA) parameter set, Received Channel Power Indicator (RCPI), Received Signal-to-Noise Ratio Indicator (RSNI), mobility domain, timeout interval (association recovery time), overlapping BSS scan parameters, TIM broadcast response, and QoS map.

[0091] In S340, the STA can perform security establishment processing. The security establishment processing in S340 can include processing for establishing a private key through a four-way handshake (e.g., through Extensible Authentication Protocol over LAN (EAPOL) frames).

[0092] Figure 4 Illustrates an example of a PPDU used in the IEEE standard.

[0093] As Figure 4 shown, various types of Physical Layer Protocol Data Units (PPDUs) are used in the IEEE a / g / n / ac standards. Specifically, the LTF and STF include training signals, the SIG-A and SIG-B include control information for the receiving STA, and the data field includes user data corresponding to the PSDU (MAC PDU / Aggregate MAC PDU).

[0094] Figure 4 Also includes an example of a HE PPDU according to IEEE 802.11ax. The HE PPDU according to Figure 4 is an exemplary PPDU for multiple users. The HE-SIG-B may be included only in the PPDU for multiple users, and the HE-SIG-B may be omitted in the PPDU for a single user.

[0095] As Figure 4 shown, the HE-PPDU for multiple users (MU) may include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a high-efficiency signal A (HE-SIG A), a high-efficiency signal B (HE-SIGB), a high-efficiency short training field (HE-STF), a high-efficiency long training field (HE-LTF), a data field (alternatively, the MAC payload), and a packet extension (PE) field. Each field may be transmitted within the indicated time period (i.e., 4 or 8 μs).

[0096] Next, the resource unit (RU) for the PPDU is described. The RU may include multiple subcarriers (or tones). The RU may be used to send signals to multiple STAs according to OFDMA. In addition, the RU may also be defined to send signals to one STA. The RU may be used for the STF, LTF, data field, etc.

[0097] Figure 5 Illustrates the layout of the resource unit (RU) used in a 20 MHz band.

[0098] As Figure 5As shown, resource units (RUs) corresponding to different numbers of tones (i.e., subcarriers) can be used to form some fields of the HE-PPDU. For example, resources can be allocated for the HE-STF, HE-LTF, and data fields in the illustrated RUs.

[0099] As Figure 5 shown in the uppermost part of, 26 units (i.e., units corresponding to 26 tones) can be arranged. Six tones can be used for the guard band in the leftmost band of the 20 MHz band, and five tones can be used for the guard band in the rightmost band of the 20 MHz band. In addition, seven DC tones can be inserted in the center band (i.e., the DC band), and 26 units corresponding to 13 tones on each of the left and right sides of the DC band can be arranged. 26 units, 52 units, and 106 units can be allocated to other bands. Each unit can be allocated to the receiving STA (i.e., the user).

[0100] Figure 5 The layout of the RUs in can be used not only for multiple users (MUs) but also for a single user (SU). In this case, one 242-unit can be used and three DC tones can be inserted, as Figure 5 shown in the lowermost part of.

[0101] Although Figure 5 RUs of various sizes are proposed, i.e., 26-RU, 52-RU, 106-RU, and 242-RU, the size of a specific RU can be extended or increased. Therefore, this embodiment is not limited to each RU of a specific size (i.e., the number of corresponding tones).

[0102] Figure 6 Illustrates the layout of the RUs used in the 40 MHz band.

[0103] Similar to using RUs of various sizes in Figure 5 , in the example of Figure 6 , 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, etc. can be used. In addition, five DC tones can be inserted at the center frequency, 12 tones can be used for the guard band in the leftmost band of the 40 MHz band, and 11 tones can be used for the guard band in the rightmost band of the 40 MHz band.

[0104] As Figure 6 shown in, when the layout of the RUs is used for a single user, 484-RU can be used. The specific number of RUs can be changed similar to Figure 5 .

[0105] Figure 7 Illustrates the layout of the RUs used in the 80 MHz band.

[0106] Similar to using RUs of various sizes inFigure 5 and Figure 6 , in the examples of Figure 7 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, etc. can be used. In addition, seven DC tones can be inserted in the center frequency, 12 tones can be used for the guard band in the leftmost band of the 80 MHz band, and 11 tones can be used for the guard band in the rightmost band of the 80 MHz band. Additionally, 26-RU corresponding to 13 tones on each of the left and right sides of the DC band can be used.

[0107] As Figure 7 shown in

[0108] When the RU layout is used for a single user, 996-RU can be used, and in this case, five DC tones can be inserted.

[0109] The RU described in this specification can be used in uplink (UL) communication and downlink (DL) communication. For example, when performing UL-MU communication through a trigger frame, the transmitting STA (e.g., AP) can allocate a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to the first STA through the trigger frame, and can allocate a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to the second STA. Thereafter, the first STA can send a first trigger-based PPDU based on the first RU, and the second STA can send a second trigger-based PPDU based on the second RU. The first / second trigger-based PPDUs are sent to the AP in the same (or overlapping) time period.

[0110] Information related to the RU layout can be signaled by HE-SIG-B.

[0111] Figure 8 Illustrates the structure of the HE-SIG-B field.

[0112] As shown, the HE-SIG-B field 810 includes a common field 820 and a user-specific field 830. The common field 820 may include information that is commonly applied to all users (i.e., user STAs) receiving SIG-B. The user-specific field 830 may be referred to as a user-specific control field. When SIG-B is transmitted to multiple users, the user-specific field 830 may be applied only to any one of the multiple users.

[0113] As Figure 8 shown, the common field 820 and the user-specific field 830 may be encoded separately.

[0114] The common field 820 may include N*8-bit RU allocation information. For example, the RU allocation information may include information related to the position of the RU. For example, when using a 20 MHz channel as Figure 5 shown, the RU allocation information may include information related to a specific frequency band where a specific RU (26-RU / 52-RU / 106-RU) is arranged.

[0115] An example of the case where the RU allocation information consists of 8 bits is as follows.

[0116] [Table 1]

[0117]

[0118] As Figure 5 shown in the example, up to nine 26-RUs can be allocated to a 20 MHz channel. When the RU allocation information of the common field 820 is set to "00000000" as shown in Table 1, nine 26-RUs can be allocated to the corresponding channel (i.e., 20 MHz). Additionally, when the RU allocation information of the common field 820 is set to "00000001" as shown in Table 1, seven 26-RUs and one 52-RU are arranged in the corresponding channel. That is, in Figure 5 the example, the 52-RU can be allocated to the rightmost side, and seven 26-RUs can be allocated to its left.

[0119] The example of Table 1 only shows some RU positions where the RU allocation information can be displayed.

[0120] For example, the RU allocation information may include the example in Table 2 below.

[0121] [Table 2]

[0122]

[0123] "01000y2y1y0" involves an example of allocating 106 - RUs to the leftmost side of a 20MHz channel and five 26 - RUs to its right. In this case, multiple STAs (e.g., user STAs) can be allocated to the 106 - RU based on the MU - MIMO scheme. Specifically, up to 8 STAs (e.g., user STAs) can be allocated to the 106 - RU, and the number of STAs (e.g., user STAs) allocated to the 106 - RU is determined based on 3 - bit information (y2y1y0). For example, when the 3 - bit information (y2y1y0) is set to N, the number of STAs (e.g., user STAs) allocated to the 106 - RU based on the MU - MIMO scheme can be N + 1.

[0124] Generally, multiple different STAs (e.g., user STAs) can be allocated to multiple RUs. However, multiple STAs (e.g., user STAs) can be allocated to one or more RUs with at least a specific size (e.g., 106 sub - carriers) based on the MU - MIMO scheme.

[0125] As Figure 8 shown, the user - specific field 830 can include multiple user fields. As described above, the number of STAs (e.g., user STAs) allocated to a specific channel can be determined based on the RU allocation information in the common field 820. For example, when the RU allocation information in the common field 820 is "00000000", one user STA can be allocated to each of the nine 26 - RUs (e.g., nine user STAs can be allocated). That is, up to 9 user STAs can be allocated to a specific channel through the OFDMA scheme. In other words, up to 9 user STAs can be allocated to a specific channel through a non - MU - MIMO scheme.

[0126] For example, when the RU allocation is set to "01000y2y1y0", multiple STAs can be allocated to the 106 - RU arranged on the leftmost side through the MU - MIMO scheme, and five user STAs can be allocated to the five 26 - RUs arranged on its right through the non - MU MIMO scheme. This case is illustrated by Figure 9 the example of.

[0127] Figure 9 The figure shows an example of allocating multiple user STAs to the same RU through the MU - MIMO scheme.

[0128] For example, when as Figure 9When the RU allocation shown is set to "01000010", 106 - RU can be allocated to the leftmost side of a specific channel, and five 26 - RU can be allocated to its right side. Additionally, three user STAs can be allocated to 106 - RU through the MU - MIMO scheme. As a result, since eight user STAs are allocated, the user - specific field 830 of HE - SIG - B can include eight user fields.

[0129] The eight user fields can be represented in the Figure 9 shown order. Additionally, as Figure 8 shown, two user fields can be implemented using one user - block field.

[0130] Figure 8 and Figure 9 shown, the user fields can be configured based on two formats. That is, the user fields related to the MU - MIMO scheme can be configured in the first format, and the user fields related to the non - MIMO scheme can be configured in the second format. Referring to the Figure 9 example, user fields 1 to user fields 3 can be based on the first format, and user fields 4 to user fields 8 can be based on the second format. The first format or the second format can include bit information of the same length (e.g., 21 bits).

[0131] Each user field can have the same size (e.g., 21 bits). For example, the user field of the first format (the first MU - MIMO scheme) can be configured as follows.

[0132] For example, the first bit (e.g., B0 - B10) within the user field (i.e., 21 bits) can include the identification information (e.g., STA - ID, partial AID, etc.) of the user STA to which the corresponding user field is allocated. Additionally, the second bit (e.g., B11 - B14) within the user field (i.e., 21 bits) can include information related to the spatial configuration.

[0133] Additionally, the third bit (i.e., B15 - 18) in the user field (i.e., 21 bits) can include modulation and coding scheme (MCS) information. The MCS information can be applied to the data field in the PPDU including the corresponding SIG - B.

[0134] The MCS, MCS information, MCS index, MCS field, etc. used in this specification can be indicated by index values. For example, the MCS information can be indicated by index 0 to index 11. The MCS information can include information related to constellation modulation types (such as BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, etc.) and information related to coding rates (such as 1 / 2, 2 / 3, 3 / 4, 5 / 6e, etc.). Information related to channel coding types (such as LCC or LDPC) may not be included in the MCS information.

[0135] In addition, the fourth bit (i.e., B19) in the user field (i.e., 21 bits) can be a reserved field.

[0136] In addition, the fifth bit (i.e., B20) in the user field (i.e., 21 bits) can include information related to coding types (such as BCC or LDPC). That is, the fifth bit (i.e., B20) can include information related to the type of channel coding (such as BCC or LDPC) applied to the data field in the PPDU including the corresponding SIG-B.

[0137] The above examples relate to the user field of the first format (the format of the MU-MIMO scheme). Examples of the user field of the second format (the format of the non-MU-MIMO scheme) are as follows.

[0138] The first bit (such as B0 - B10) in the user field of the second format can include the identification information of the user STA. In addition, the second bit (such as B11 - B13) in the user field of the second format can include information related to the number of spatial streams applied to the corresponding RU. In addition, the third bit (such as B14) in the user field of the second format can include information related to whether to apply a beamforming steering matrix. The fourth bit (such as B15 - B18) in the user field of the second format can include modulation and coding scheme (MCS) information. In addition, the fifth bit (such as B19) in the user field of the second format can include information related to whether to apply dual-carrier modulation (DCM). In addition, the sixth bit (i.e., B20) in the user field of the second format can include information related to coding types (such as BCC or LDPC).

[0139] Hereinafter, the PPDU transmitted / received in the STA of this specification will be described.

[0140] Figure 10 An example of the PPDU used in this disclosure is illustrated.

[0141] Figure 10The PPDU can be referred to by various terms, such as an EHT PPDU, a transmitting PPDU, a receiving PPDU, a first type or an Nth type PPDU, etc. For example, in this specification, the PPDU or the EHT PPDU can be referred to by using various terms such as a transmitting PPDU, a receiving PPDU, a first type or an Nth type PPDU. Additionally, the EHT PPDU can be used in an EHT system and / or in a new WLAN system that is an enhanced version of the EHT system.

[0142] Figure 10 The PPDU can represent a part or all of the PPDU types used in an EHT system. For example, Figure 10 The examples can be used for both single-user (SU) mode and multi-user (MU) mode. In other words, Figure 10 The PPDU can be a PPDU for one receiving STA or a PPDU for multiple receiving STAs. In Figure 10 When the PPDU is used in a trigger-based (TB) mode, the Figure 10 EHT-SIG can be omitted. In other words, a STA that has received a trigger frame for uplink MU (UL-MU) communication can send a PPDU, and in Figure 10 the example, the EHT-SIG is omitted from the PPDU.

[0143] In Figure 10 , the L-STF to EHT-LTF can be referred to as a preamble or a physical preamble, and the L-STF to EHT-LTF can be generated / transmitted / received / obtained / decoded in the physical layer.

[0144] Figure 10 The subcarrier spacing of the L-LTF, L-STF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields in

[0145] In Figure 10 the PPDU can be determined to be 312.5 kHz, and the subcarrier spacing of the EHT-STF, EHT-LTF, and data fields can be determined to be 78.125 kHz. That is, the tone index (or subcarrier index) of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields can be indicated in units of 312.5 kHz, and the tone index (or subcarrier index) of the EHT-STF, EHT-LTF, and data fields can be indicated in units of 78.125 kHz.

[0145] In Figure 10 the PPDU, the L-LTF and L-STF can be the same as the fields in the prior art (or related art).

[0146] Figure 10The L-SIG field can include, for example, 24 bits of bit information. For example, the 24-bit information can include a 4-bit rate field, 1 reserved bit, a 12-bit length field, 1 parity bit, and 6 tail bits. For example, the 12-bit length field can include information related to the PPDU length or duration. For example, the value of the 12-bit length field can be determined based on the type of the PPDU. For example, in the case where the PPDU is a non-HT PPDU, an HT PPDU, a VHT PPDU, or an EHT PPDU, the value of the length field can be determined to be a multiple of 3. For example, in the case where the PPDU is a HE PPDU, the value of the length field can be determined to be "a multiple of # + 1" or "a multiple of # + 2". In other words, the value of the length field for a non-HT PPDU, an HT PPDU, a VHT PPDU, or an EHT PPDU can be determined to be a multiple of 3, and the value of the length field for a HE PPDU can be determined to be "a multiple of 3 + 1" or "a multiple of # + 2".

[0147] For example, the transmitting STA can apply BCC coding with a 1 / 2 coding rate to the 24-bit information of the L-SIG field. After that, the transmitting STA can obtain 48 BCC-coded bits. Then, BPSK modulation can be applied to the 48 coded bits to generate 48 BPSK symbols. The transmitting STA can map the 48 BPSK symbols to positions other than the pilot subcarriers {subcarrier indices -21, -7, +7, +21} and the DC subcarrier {subcarrier index 0}. As a result, the 48 BPSK symbols can be mapped to subcarrier indices -26 to -22, -20 to -8, -6 to -1, +1 to +6, +8 to +20, and +22 to +26. The transmitting STA can additionally map the signal of {-1, -1, -1, 1} to subcarrier indices {-28, -27, +27, +28}. The foregoing signal can be used for channel estimation for the frequency domain corresponding to {-28, -27, +27, +28}.

[0148] The transmitting STA can generate an RL-SIG generated in the same way as the L-SIG. The receiving STA can know that the received PPDU is a HE PPDU or an EHT PPDU based on the presence (or existence) of the RL-SIG.

[0149] can be inserted Figure 10 a Universal SIG (U-SIG) after the RL-SIG of. The U-SIG can also be referred to by using various terms such as the first SIG field, the first SIG, the first type SIG, the control signal, the control signal field, the first (type) control signal, etc.

[0150] The U-SIG may include N-bit information and may also include information for identifying the EHT PPDU type. For example, the U-SIG may be configured based on 2 symbols (e.g., two consecutive OFDM symbols). Each symbol (e.g., OFDM symbol) for the U-SIG may have a duration of 4 μs. Each symbol of the U-SIG may be used to transmit 26-bit information. For example, each symbol of the U-SIG may be transmitted / received based on 52 data tones and 4 pilot tones.

[0151] For example, A-bit information (e.g., 52 uncoded bits) may be transmitted through the U-SIG (or U-SIG field), and the first symbol of the U-SIG may transmit the first X bits of the total A bits of the corresponding information (e.g., 26 uncoded bits), and the second symbol of the U-SIG may transmit the remaining Y bits of the A-bit information (e.g., 26 uncoded bits). For example, the transmitting STA may obtain the 26 uncoded bits included in each U-SIG symbol. The transmitting STA may perform convolutional coding (i.e., BCC coding) at a rate of R = 1 / 2 to generate 52 coded bits, and then, the transmitting STA may perform interleaving on the 52 coded bits. The transmitting STA may perform BPSK modulation on the interleaved 52 coded bits to generate 52 BPSK symbols assigned to each U-SIG symbol. Except for the DC index 0, one U-SIG symbol may be transmitted based on 56 tones (subcarriers) from subcarrier index -28 to subcarrier index +28. The 52 BPSK symbols generated by the transmitting STA may be transmitted based on the remaining tones (subcarriers) except for the pilot tones -21, -7, +7, +21.

[0152] For example, the A-bit information (e.g., 52 uncoded bits) may include a CRC field (e.g., a 4-bit length field) and a tail field (e.g., a 6-bit length field). The CRC field and the tail field may be transmitted through the second symbol of the U-SIG. The CRC field may be generated based on the 26 bits assigned to the first symbol of the U-SIG and the remaining 16 bits excluding the CRC / tail field from the second symbol. And the CRC field may be generated based on the CRC calculation algorithm of the prior art. Additionally, the tail field may be used to terminate the trellis of the convolutional decoder and may be configured as, for example, "".

[0153] The A-bit information (e.g., 52 unencoded bits) sent by the U-SIG (or U-SIG field) can be divided into version-independent bits and version-dependent bits. For example, the size of the version-independent bits can be fixed or variable. For example, the version-independent bits can be assigned only to the first symbol of the U-SIG, or can be assigned to both the first symbol and the second symbol of the U-SIG. For example, the version-independent bits and version-dependent bits can be referred to using various terms such as the first control bit and the second control bit.

[0154] For example, the version-independent bits of the U-SIG can include a 3-bit PHY version identifier. For example, the 3-bit PHY version identifier can include information related to the PHY version of the transmitted / received PPDU. For example, the first value of the 3-bit PHY version identifier can indicate that the transmitted / received PPDU is an EHT PPDU. In other words, when the transmitting STA sends an EHT PPDU, the transmitting STA can configure the 3-bit PHY version identifier to the first value. In other words, based on the PHY version identifier having the first value, the receiving STA can determine that the received PPDU is an EHT PPDU.

[0155] For example, the version-independent bits of the U-SIG can include a 1-bit UL / DL flag field. The first value of the 1-bit UL / DL flag field is related to UL communication, and the second value of the 1-bit UL / DL flag field is related to DL communication.

[0156] For example, the version-independent bits of the U-SIG can include information related to the length of the TXOP and information related to the BSS color ID.

[0157] For example, in the case where an EHT PPDU is divided into various types (e.g., an EHT PPDU related to the SU mode, an EHT PPDU related to the MU mode, an EHT PPDU related to the TB mode, an EHT PPDU related to extended range transmission, etc.), information related to the EHT PPDU type can be included in the version-dependent bits of the U-SIG.

[0158] For example, the U-SIG may include information related to the following: 1) a bandwidth field, which includes information related to the bandwidth, 2) a field including information related to the MCS scheme applied to the EHT-SIG, 3) an indication field including information related to whether the dual subcarrier modulation (DCM) scheme is applied to the EHT-SIG, 4) a field including information related to the number of symbols used for the EHT-SIG, 5) a field including information related to whether the EHT-SIG is generated across the entire band, 6) a field including information related to the EHT-LTF / STF type; 7) a field indicating the EHT-LTF length and the CP length.

[0159] Preamble puncturing may be applied to Figure 10 the PPDU. Preamble puncturing refers to applying puncturing to a partial band (e.g., a secondary 20 MHz band) of the entire band of the PPDU. For example, when transmitting an 80 MHz PPDU, the STA may apply puncturing to the secondary 20 MHz band in the 80 MHz band and may transmit the PPDU only through the primary 20 MHz band and the secondary 40 MHz band.

[0160] For example, the pattern of preamble puncturing may be preset (or predetermined). For example, when applying the first puncturing pattern, the puncturing may be applied only to the secondary 20 MHz band within the 80 MHz band. For example, when applying the second puncturing pattern, the puncturing may be applied to only one of the two secondary 20 MHz bands included in the secondary 40 MHz band within the 80 MHz band. For example, when applying the third puncturing pattern, the puncturing may be applied only to the secondary 20 MHz band included in the primary 80 MHz band within the 160 MHz band (or 80 + 80 MHz band). For example, when applying the fourth puncturing pattern and when there is a primary 40 MHz band included in the primary 80 MHz band within the 160 MHz band (or 80 + 80 MHz band), the puncturing may be applied to at least one 20 MHz channel that does not belong to the primary 40 MHz band.

[0161] The information related to the preamble puncturing applied to the PPDU may be included in the U-SIG and / or the EHT-SIG. For example, the first field of the U-SIG may include information related to the contiguous bandwidth of the PPDU, and the second field of the U-SIG may include information related to the preamble puncturing applied to the PPDU.

[0162] For example, U-SIG and EHT-SIG may include information related to preamble puncturing based on the following method. When the bandwidth of the PPDU exceeds 80 MHz, the U-SIG can be configured individually in 80 MHz units. For example, when the bandwidth of the PPDU is 160 MHz, a first U-SIG for the first 80 MHz band and a second U-SIG for the second 80 MHz band may be included in the corresponding PPDU. In this case, the first field of the first U-SIG may include information related to the 160 MHz bandwidth, and the second field of the first U-SIG may include information related to the preamble puncturing applied to the first 80 MHz band (i.e., information related to the preamble puncturing pattern). Additionally, the first field of the second U-SIG may include information related to the 160 MHz bandwidth, and the second field of the second U-SIG may include information related to the preamble puncturing applied to the second 80 MHz band (i.e., information related to the preamble puncturing pattern). Meanwhile, the EHT-SIG consecutive to the first U-SIG may include information related to the preamble puncturing applied to the second 80 MHz band (i.e., information related to the preamble puncturing pattern), and the EHT-SIG consecutive to the second U-SIG may include information related to the preamble puncturing applied to the first 80 MHz band (i.e., information related to the preamble puncturing pattern).

[0163] Additionally or alternatively, U-SIG and EHT-SIG may include information related to preamble puncturing based on the following method. The U-SIG may include information related to preamble puncturing for all bands (i.e., information related to the preamble puncturing pattern). That is, the EHT-SIG may not include information related to preamble puncturing, and only the U-SIG may include information related to preamble puncturing (i.e., information related to the preamble puncturing pattern).

[0164] The U-SIG may be configured in 20 MHz units. For example, when configuring an 80 MHz PPDU, the U-SIG may be replicated. That is, 4 identical U-SIGs may be included in the 80 MHz PPDU. A PPDU with a bandwidth exceeding 80 MHz may include different U-SIGs.

[0165] Figure 10 The EHT-SIG may include control information for the receiving STA. The EHT-SIG may be transmitted through at least one symbol, and the one symbol may have a length of 4 μs. Information about the number of symbols for the EHT-SIG may be included in the U-SIG.

[0166] The EHT-SIG may include the technical features of HE-SIG-B described above with reference to Figures 8 to 9 For example, as in Figure 8In the example of, the EHT-SIG can include common fields and user-specific fields. The common fields of the EHT-SIG can be omitted, and the number of user-specific fields can be determined based on the number of users.

[0167] As in Figure 8 the example of, the common fields of the EHT-SIG and the user-specific fields of the EHT-SIG can be compiled separately (or individually). Although one user block field included in the user-specific fields can include information for two users, the last user block field included in the user-specific fields may include information for one user. That is, one user block field of the EHT-SIG can include at most two user fields. As in Figure 9 the example of, each user field can be related to MU-MIMO allocation or can be related to non-MU-MIMO allocation.

[0168] As in Figure 8 the example of, the common fields of the EHT-SIG can include CRC bits and tail bits. Also, the length of the CRC bits can be determined to be equal to 4 bits, and the length of the tail bits can be determined to be equal to 6 bits and can be set (or configured) to "000000".

[0169] As in Figure 8 the example of, the common fields of the EHT-SIG can include RU allocation information. The RU allocation information can refer to information related to the positions of RUs allocated to multiple users (i.e., multiple receiving STAs). As shown in Table 1, the RU allocation information can be configured as an 8-bit (or N-bit) unit.

[0170] A mode with omitted common fields of the EHT-SIG can be supported. The mode with omitted common fields of the EHT-SIG can be referred to as a compressed mode. When using the compressed mode, multiple users of the EHT PPDU (i.e., multiple receiving STAs) can decode the PPDU (i.e., the data field of the PPDU) based on non-OFDMA. That is, multiple users of the EHT PPDU can decode the PPDU (i.e., the data field of the PPDU) received through the same frequency band. At the same time, when using the non-compressed mode, multiple users of the EHT PPDU can decode the PPDU (i.e., the data field of the PPDU) based on OFDMA. That is, multiple users of the EHT PPDU can receive the PPDU (i.e., the data field of the PPDU) through different frequency bands.

[0171] The EHT-SIG can be configured based on various MCS schemes. As described above, information related to the MCS scheme applied to the EHT-SIG can be included in the U-SIG. The EHT-SIG can be configured based on the DCM scheme. For example, among the N number of data tones (e.g., 52 data tones) allocated for the EHT-SIG, a first modulation scheme can be applied to half of the consecutive tones, and a second modulation scheme can be applied to the remaining half of the consecutive tones. That is, the transmitting STA can modulate specific control information to a first symbol based on the first modulation scheme and assign the modulated first symbol to half of the consecutive tones. Thereafter, the transmitting STA can modulate the same control information to a second symbol based on the second modulation scheme and assign the modulated second symbol to the other half of the consecutive tones. As described above, information related to whether the DCM scheme is applied to the EHT-SIG (e.g., a 1-bit field) can be included in the U-SIG. Figure 10 The EHT-STF of Figure 10 can be used to enhance the automatic gain control estimation in a multiple-input multiple-output (MIMO) environment or an OFDMA environment. And, Figure 10 The EHT-LTF of Figure 10 can be used to estimate the channel in a MIMO environment or an OFDMA environment.

[0172] Information related to the STF and / or LTF type (including information related to the GI applied to the LTF) can be included in Figure 10 the SIG A field and / or the SIG B field of Figure 10 .

[0173] It can be based on Figure 5 and Figure 6 the examples of Figure 6 to configure Figure 10 the PPDU (i.e., the EHT-PPDU) of Figure 10 .

[0174] For example, the EHT PPDU transmitted on a 20 MHz band (i.e., the 20 MHz EHTPPDU) can be configured based on the Figure 5 RU of Figure 5 . That is, the positions of the EHT-STF, EHT-LTF, and the RU of the data field included in the EHT PPDU can be determined as shown in Figure 5 Figure 5 .

[0175] It can be based on Figure 6 the RU of Figure 6 to configure the EHT PPDU transmitted on a 40 MHz band (i.e., the 40 MHz EHT PPDU). That is, the positions of the EHT-STF, EHT-LTF, and the RU of the data field included in the EHT PPDU can be determined as shown in Figure 6 Figure 6 .

[0176] Since Figure 6The RU position corresponding to 40 MHz, so if Figure 6 The pattern of Figure 6 is repeated twice, the tone plan for 80 MHz can be determined. That is, based on repeating Figure 7 the RU twice instead of

[0177] In Figure 6 the case where the pattern of

[0178] is repeated twice, 23 tones can be configured in the DC region (i.e., 11 guard tones + 12 guard tones). That is, the tone plan for an 80 MHz EHT PPDU based on OFDMA allocation can have 23 DC tones. On the other hand, an 80 MHz EHT PPDU based on non-OFDMA allocation (i.e., non-OFDMA full-bandwidth 80 MHz PPDU) can be configured based on 996 RUs and can include 5 DC tones, 12 left guard tones, and 11 right guard tones. Figure 6 The tone plan for 160 / 240 / 320 MHz can be configured in a format with the pattern of

[0179] repeated multiple times. Figure 10 The PPDU of

[0180] can be identified as an EHT PPDU based on the following method. Figure 10 The receiving STA can determine the type of the RX PPDU as an EHT PPDU based on the following aspects. For example, 1) when the first symbol after the L-LTF signal of the RX PPDU is a BPSK symbol; 2) when the RL-SIG of the repeated RX PPDU's L-SIG is detected; and 3) when the result of applying "mod 3" to the value of the length field of the L-SIG of the RX PPDU is detected as "0", the RX PPDU can be determined as an EHT PPDU. When the RX PPDU is determined as an EHT PPDU, the receiving STA can detect the type of the EHT PPDU (e.g., SU / MU / trigger-based / extended range type) based on the bit information included in the symbols after the RL-SIG of

[0181] For example, the receiving STA may determine the type of the RX PPDU as an EHT PPDU based on the following aspects. For example, 1) when the first symbol after the L-LTF signal is a BPSK symbol; 2) when the RL-SIG of the repeated L-SIG is detected; and 3) when the result of applying "modulo 3" to the value of the length field of the L-SIG is detected as "1" or "2", the RX PPDU may be determined as a HEPPDU.

[0182] For example, the receiving STA may determine the type of the RX PPDU as a non-HT, HT, and VHT PPDU based on the following aspects. For example, 1) when the first symbol after the L-LTF signal is a BPSK symbol; and 2) when the RL-SIG of the repeated L-SIG is not detected, the RX PPDU may be determined as a non-HT, HT, and VHT PPDU. Additionally, even if the receiving STA detects the repetition of the RL-SIG, when the result of applying "modulo 3" to the value of the length field of the L-SIG is detected as "0", the RX PPDU may also be determined as a non-HT, HT, and VHT PPDU.

[0183] In the following examples, the signals represented by (TX / RX / UL / DL) signals, (TX / RX / UL / DL) frames, (TX / RX / UL / DL) packets, (TX / RX / UL / DL) data units, (TX / RX / UL / DL) data, etc. may be signals transmitted / received based on Figure 10 the PPDU. Figure 10 The PPDU of Figure 10 can be used to transmit / receive various types of frames. For example, Figure 10 the PPDU of Figure 10 can be used for control frames. Examples of control frames may include Request To Send (RTS), Clear To Send (CTS), Power Save (PS) poll, BlockACKReq, BlockAck, Null Data Packet (NDP) announcement, and trigger frames. For example, Figure 10 the PPDU of Figure 10 can be used for management frames. Examples of management frames may include beacon frames, (re)association request frames, (re)association response frames, probe request frames, and probe response frames. For example, Figure 10 the PPDU of Figure 10 can be used for data frames. For example, Figure 10 the PPDU of

[0184] Figure 11 illustrates a modified example of the transmitting device and / or receiving device of this specification.

[0185] Figure 1 Each device / STA shown in subfigure (a) / (b) of Figure 11 can be modified as shown in Figure 11The transceiver 630 can be the same as Figure 1 the transceivers 113 and 123. Figure 11 The transceiver 630 can include a receiver and a transmitter.

[0186] Figure 11 The processor 610 can be the same as Figure 1 the processors 111 and 121 shown in Figure 11 Alternatively, the processor 610 can be the same as Figure 1 the processing chips 114 and 124 shown in

[0187] Figure 11 The memory 150 can be the same as Figure 1 the memories 112 and 122 shown in Figure 11 Alternatively, the memory 150 can be a separate external memory different from Figure 1 the memories 112 and 122 shown in

[0188] Referring to Figure 11 , the power management module 611 manages the power for the processor 610 and / or the transceiver 630. The battery 612 powers the power management module 611. The display 613 outputs the results processed by the processor 610. The keypad 614 receives the inputs to be used by the processor 610. The keypad 614 can be shown on the display 613. The SIM card 615 can be an integrated circuit designed to securely store the International Mobile Subscriber Identity (IMSI) number and its associated keys, which are used to identify and authenticate subscribers on mobile phone devices such as mobile phones and computers.

[0189] Referring to Figure 11 , the speaker 640 can output the sound-related results processed by the processor 610. The microphone 641 can receive the sound-related inputs to be used by the processor 610.

[0190] 1. Subcarrier and Resource Allocation for Broadband

[0191] The broadband described in this specification refers to a band with a bandwidth of 80 MHz or wider (80 MHz, 160 MHz, and 320 MHz). The tone plan (or resource unit (RU) layout) used in the 20 MHz and 40 MHz bands is the same in 802.11ax and 802.11be (using the Figure 5 and Figure 6 RU layout without modification).

[0192] As described below, the data and pilot subcarrier indices of the RUs in a 20 MHz HE / EHT PPDU are fixed. In the table below, the subcarriers with a subcarrier index of 0 correspond to the DC tone. The subcarriers with a negative subcarrier index correspond to the subcarriers with a frequency lower than the DC tone. Also, the subcarriers with a positive subcarrier index correspond to the subcarriers with a frequency higher than the DC tone. At this time, RU 5 is an intermediate 26-tone RU.

[0193] [Table 3]

[0194]

[0195] The data and pilot subcarrier indices of the RUs in a 40 MHz HE / EHT PPDU are fixed, as described below. In the table below, the subcarriers with a subcarrier index of 0 correspond to the DC tone. The subcarriers with a negative subcarrier index correspond to the subcarriers with a frequency lower than the DC tone. Also, the subcarriers with a positive subcarrier index correspond to the subcarriers with a frequency higher than the DC tone.

[0196] [Table 4]

[0197]

[0198]

[0199] However, for wideband, since the tone plan of 802.11be and the tone plan of 802.11ax are defined differently, the tone plan for the 80 MHz band will be described as follows.

[0200] Figure 12 The figure illustrates the tone plan for an 80 MHz PPDU in an 802.11be WLAN system.

[0201] The tone plans and RU positions for 20 MHz and 40 MHz PPDUs in an 802.11be WLAN system are the same as those for 20 MHz and 40 MHz PPDUs in an 802.11ax WLAN system. Figure 12 The figure illustrates the EHT tone plan and RU position for an 80 MHz PPDU. The EHT PPDU extended to the 160 MHz band or wider is configured by multiple 80 MHz sub-blocks. The tone plan for each 80 MHz sub-block is the same as the tone plan for an 80 MHz EHT PPDU. When an 80 MHz sub-block within an 80 / 160 / 320 MHz PPDU is not punctured and the complete (or whole) 80 MHz sub-block is used as an RU or part of an RU or MRU, this 80 MHz sub-block uses a 996-tone RU, as Figure 12As shown. When the 80MHz sub-block is punctured within an 80 / 160 / 320MHz PPDU, or when the complete (or entire) 80MHz sub-block is not used as part of an RU or MRU, the 80MHz sub-block uses a tone plan that does not include 996-tone RUs, as Figure 12 shown in

[0202] As described below, the data and pilot subcarrier indices of the RUs in an 80MHz EHT PPDU are fixed. In the following table, the subcarriers with a subcarrier index of 0 correspond to the DC tone. The subcarriers with a negative subcarrier index correspond to the subcarriers with a frequency lower than the DC tone. And, the subcarriers with a positive subcarrier index correspond to the subcarriers with a frequency higher than the DC tone. Additionally, in 802.11be, since the intermediate 26-tone RU is not defined in the tone plan for the 80MHz band, RU 19 is indicated as "undefined".

[0203] [Table 5]

[0204]

[0205]

[0206] Additionally, in 802.11be, the tone plan for the 160MHz band is configured by repeating the Figure 12 tone plan twice. Herein, the data and pilot subcarrier indices of the RUs in a 160MHz EHT PPDU can be fixed based on Table 5. And, in 802.11be, the tone plan for the 320MHz band is configured by repeating the Figure 12 tone plan four times. Herein, the data and pilot subcarrier indices of the RUs in a 320MHz EHT PPDU can be fixed based on Table 5.

[0207] Furthermore, in 802.11be, multiple RUs (MRUs) can be assigned to an EHT STA, and the subcarrier indices of the MRU can be configured by the RU indices shown in Table 5.

[0208] 2. Non-AP STA operating in 20MHz

[0209] A non-AP EHT STA operating in 20 MHz is a non-AP EHT STA whose current operating mode supports the maximum channel width of 20 MHz. The supported channel width of the non-AP EHT STA is indicated in the supported channel width subfield of the HE PHY capability information field. In the 6 GHz subfield of the EHT capability element, when there is no operation mode notification frame, operation mode notification element with Rx NSS type subfield equal to 0, or EHT OM control subfield in the same A control field, the channel width subfield or the channel extension subfield of the EHT OM control subfield and the OM control subfield sent from the EHT STA for the supported and operating channel widths for 320 MHz can be updated.

[0210] A non-AP EHT STA operating in 20 MHz is either a 20 MHz-only non-AP EHT STA or a non-AP EHT STA capable of operating only in a 20 MHz channel width, such as a non-AP EHT STA that reduces its operating channel width to 20 MHz.

[0211] A non-AP EHT STA operating in 20 MHz should be able to participate in 20 MHz, 40 MHz, 80 MHz, or 160 MHz EHT DL and UL OFDMA transmissions. In addition to the 20 MHz-only non-AP EHT STA, a non-AP EHT STA operating in 20 MHz should also be able to participate in 320 MHz EHT DL and UL OFDMA transmissions.

[0212] When participating in EHT DL and UL OFDMA transmissions using a 20 MHz PPDU bandwidth, a non-AP EHT STA operating in 20 MHz should support 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, 52+26-tone MRUs, and 106+26-tone MRUs. The EHT AP should be able to allocate the RUs or MRUs of the 20 MHz EHT MU PPDU or EHT TB PPDU to non-AP EHT STAs operating in 20 MHz.

[0213] When participating in EHT DL and UL OFDMA transmissions using a PPDU bandwidth greater than 20 MHz and less than 320 MHz, non-AP EHT STAs operating in 20 MHz can support 26-tone RUs, 52-tone RUs, 106-tone RUs, and 52+26-tone MRUs. When participating in EHT DL and UL OFDMA transmissions using a 320-MHz PPDU bandwidth, non-AP EHT STAs operating in 20 MHz, other than only 20-MHz non-AP EHT STAs, shall also support 26-tone RUs, 52-tone RUs, 106-tone RUs, and 52+26-tone MRUs at the previously permitted locations. When participating in EHT DL transmissions using a 320-MHz PPDU bandwidth, non-AP EHT STAs operating in 20 MHz, other than only 20-MHz non-AP EHT STAs, can also support 242-tone RUs. An EHT AP with an operating channel width greater than 20 MHz can allocate RUs or MRUs in the 20-MHz channels within the BSS bandwidth of a 40-MHz, 80-MHz, or 160-MHz EHT MU PPDU or EHT TB PPDU to non-AP EHT STAs operating in 20 MHz according to the operating channel width of the AP. The operating channel of the AP is the same as the BSS channel width. An EHT AP with a 320-MHz operating channel width shall be able to allocate RUs or MRUs in the 20-MHz channels within the BSS bandwidth of a 320-MHz EHT MU PPDU or EHT TB PPDU to non-AP EHT STAs operating in 20 MHz, other than only 20-MHz non-AP EHT STAs. When the EHT AP allocates RUs or MRUs to non-AP EHT STAs operating in 20 MHz, the EHT AP shall follow the constraints (or limitations) for 20-MHz operation, which will be described later.

[0214] Non-AP EHT STAs operating in 20 MHz shall be able to transmit preambles and data from RUs or MRUs allocated to the 20-MHz channels operating in 20-MHz, 40-MHz, 80-MHz, or 160-MHz EHT TB PPDUs. Non-AP EHT STAs operating in 20 MHz, other than only 20-MHz non-AP EHT STAs, shall also be able to transmit preambles and data from RUs or MRUs allocated to the 20-MHz channels operating in 320-MHz EHT TB PPDUs. When the EHT AP allocates RUs or MRUs to non-AP EHT STAs operating in 20 MHz, the EHT AP shall follow the constraints (or limitations) for 20-MHz operation, which will be described later.

[0215] A non-AP EHT STA operating in 20 MHz shall be able to support receiving preambles and data in the RUs or MRUs of the 20 MHz channels allocated to 20 MHz, 40 MHz, 80 MHz, or 160 MHz EHT MU PPDUs. A non-AP EHT STA operating in 20 MHz, other than a 20 MHz only non-AP EHT STA, shall also be able to support receiving preambles and data in the RUs or MRUs of the 20 MHz channels allocated to 320 MHz EHT MU PPDUs. The RU and MRU constraints (or limitations) for 20 MHz operation are described later.

[0216] When a non-AP EHT STA operating in 20 MHz is not configured (or set) with subchannel selective transmission (SST) operation in a non-primary 20 MHz channel with an EHT AP, the EHT AP shall not allocate RUs or MRUs outside the primary 20 MHz in 80 MHz, 160 MHz, or 320 MHz EHT MU PPDUs or EHT TB PPDUs to the non-AP EHT STA operating in 20 MHz.

[0217] 3. Embodiments Applicable to this Specification

[0218] To increase peak throughput, the 802.11be WLAN system is considering transmitting increased streams by using a wider band than traditional 802.11ax or by using a larger number of antennas. In addition, this specification also considers methods of using various bands / links by performing aggregation.

[0219] Meanwhile, in the 2.4 GHz or 5 GHz band, only 20 MHz or an operating non-AP STA can be used (in this document, the corresponding non-AP STA can also be additionally used in the 6 GHz band). And, in this case, the only 20 MHz or operating non-AP STA can be assigned to the RU within a specific 20 MHz sub-channel of a 20 MHz PPDU and a 40 / 80 / 160 / 320 MHz PPDU, enabling data transmission / reception. In this case, this specification presents the RUs in 20 MHz that cannot be assigned to the only 20 MHz or operating STA. Here, the 20 MHz operating STA is a non-AP EHT STA operating in the 20 MHz channel width mode, which means the STA is the same as the only 20 MHz non-AP EHT STA or an EHT STA that reduces its operating channel width to 20 MHz by using the Operating Mode Indication (OMI). The only 20 MHz STA corresponds to the only 20 MHz non-AP EHT STA, which means this STA is a non-AP EHT STA that only supports a 20 MHz channel width for the frequency band in the Supported Channel Width Set sub-field of the HE PHY Capability Information field included in the HE Capability Element.

[0220] Figure 13 An example of an RU that cannot be assigned to the only 20 MHz or operating STA in a 40 MHz PPDU transmission is illustrated.

[0221] This specification presents each RU and MRU within 242 RUs that cannot be assigned to the only 20 MHz or operating STA in each bandwidth PPDU transmission case. Since the tone plan for each bandwidth is different from that of 20 MHz, the only 20 MHz or operating STA cannot be assigned to the corresponding RU and MRU because the tones corresponding to the DC tone and the guard tone are used to transmit actual data during 20 MHz receiver processing. Therefore, the assignment of specific RUs and MRUs is restricted due to the possibility of performance degradation and interference on adjacent channels. For example, as Figure 13 shown, the RU part marked as the shaded area in 40 MHz corresponds to the RU that includes the DC or guard tone in 20 MHz receiver processing.

[0222] Therefore, during 40 MHz transmission, the RU marked as the shaded area in Figure 13 can be not assigned to the only 20 MHz or operating STA. However, since the performance degradation can be overcome according to the data sub-carrier loss rate, some RUs assigned to the only 20 MHz or operating STA can be used.

[0223] 3.1 20MHz

[0224] Figure 14Illustrates examples of 26+52-tone MRUs and 26+106-tone MRUs used in 20MHz EHT PPDU OFDMA transmissions.

[0225] The 20MHz EHT PPDU transmission uses the same tone plan as the existing 11ax. And, more specifically, when considering the 26+52 RUs corresponding to one MRU, the tone plan shown in Figure 14 can be used. In a 20MHz EHT PPDU, only 20MHz or the operating STA can be assigned to all the RUs and MRUs defined in the corresponding bandwidth.

[0226] 3.2 40MHz

[0227] Figure 15 Illustrates examples of 26+52-tone MRUs and 26+106-tone MRUs used in 40MHz EHT PPDU OFDMA transmissions.

[0228] The 40MHz EHT PPDU transmission uses the same tone plan as the existing 11ax. And, more specifically, when considering the 26+52 RUs corresponding to one MRU, the tone plan shown in Figure 15 can be used. As described below, depending on the size of each RU and MRU, RUs and MRUs that cannot be assigned to only 20MHz or the operating STA are proposed. The indices of the RUs described below are described as the same as the RU indices shown in Table 4.

[0229] 26RU: The 5th, No. 9 , No. 10 , the 14th 26RU

[0230] 52RU: No. 4 , No. 5 52RUs

[0231] 26+52RU (78RU): 5th 26RU + 2nd 52RU , 14th 26RU + 6th 52RU

[0232] 106RU: No. 2 , No. 3 106RUs

[0233] 26+106RU: 5th 26RU + 1st 106RU , 5th 26RU + 2nd 106RU , 14th 26RU + 3rd 106RU , 14th 26RU + 4th 106RU , i.e., All 26 + 106RU

[0234] 242RU: All 242RU

[0235] In addition to the RUs and MRUs listed above, the RUs and MRUs within another 242 RUs can be allocated to only 20 MHz or operating STAs.

[0236] However, when considering the DC protection tones corresponding to 20 MHz receiver processing, since the data loss rate of the underlined RUs or MRUs is not significant, sufficient reliable performance can be achieved through coding gain when performing decoding. Therefore, the underlined RUs or MRUs can also be allocated to only 20 MHz or operating STAs.

[0237] 4.3. Each 80 MHz subchannel in 80 MHz or wider bandwidth

[0238] Each 80 MHz subchannel of a PPDU using a bandwidth of 80 MHz and wider (160 MHz, 320 MHz) uses Figure 12 the traditional 11ax and tone plans shown in

[0239] Figure 16 illustrates an example of a 26 + 52 tone MRU used in 80 MHz EHT PPDU OFDMA transmission.

[0240] Figure 16 shows in Figure 12 the tone plan considering the 26 + 52 tone MRU in the tone plan of

[0241] Figure 17 illustrates an example of a 26 + 106 tone MRU used in 80 MHz EHT PPDU OFDMA transmission.

[0242] Figure 17 shows in Figure 12 the tone plan considering the 26 + 106 tone MRU in the tone plan of

[0243] As described below, in each 80 MHz subchannel of a PPDU using a bandwidth of 80 MHz or wider (160 MHz, 320 MHz), RUs and MRUs that cannot be allocated to only 20 MHz or operating STAs are proposed according to the size of each RU and MRU. The index of the RUs described below is described as the same as the RU index shown in Table 5. However, in this article, in Table 5, although the 19th 26 RU among the middle 26 RUs is indicated as the index, the corresponding RU is designated as "undefined". Therefore, the index of the RUs described later indicates that no index is assigned to the middle 26 RUs. For example, the 23rd, 27th, 28th, and 32nd 26 RUs described later are indicated as RU 24, RU 28, RU 29, and RU 33 in Table 5 respectively.

[0244] 26RU: The 5th, No. 9 , No. 10 , the 14th, the 23rd, No. 27 , No. 28 , and the 32nd 26RU

[0245] 52RU: No. 4 , No. 5 , No. 12 , No. 13 pieces of 52RU

[0246] 26 + 52RU (78RU): 5th 26RU + 2nd 52RU , 14th 26RU + 6th 52RU , 23rd 26RU + 10th 52RU , 32nd 26RU + 14th 52RU

[0247] 106RU: No. 2 , No. 3 , No. 6 , No. 7 pieces of 106RU

[0248] 26 + 106RU: 5th 26RU + 1st 106RU , 14th 26RU + 4th 106RU , 23rd 26RU + 5th 106RU , 32nd 26RU + 8th 106RU , i.e., All 26 + 106RU

[0249] 242RU: All 242RU

[0250] Except for the RUs and MRUs listed above, the RUs and MRUs within another 242RU can be allocated to only 20MHz or operating STAs.

[0251] However, when considering the DC protection tones corresponding to 20MHz receiver processing, since the data loss rate of the underlined RUs or MRUs is not significant, sufficient reliable performance can be achieved through coding gain during decoding. Therefore, the underlined RUs or MRUs can also be allocated to only 20MHz or operating STAs.

[0252] Although the underlined RU or MRU designated can be allocated to only 20 MHz or the operating STA, among the corresponding RUs or MRUs, 26+52 RU and 26+106 RU and all 242 RUs may not be allocated to only 20 MHz or the operating STA due to DC tone issues. More specifically, in an uplink (UL)-triggered (TB) PPDU, 26+52 RU and 26+106 RU and all 242 RUs may not be allocated to only 20 MHz or the operating STA. Additionally, in downlink (DL) transmission, although the allocation of the aforementioned underlined RU or MRU may not be advantageous in terms of performance, since performance can be enhanced through implementation, the corresponding RU or MRU can be used by being allocated to only 20 MHz or the operating STA.

[0253] Although the underlined RU or MRU designated can be allocated to only 20 MHz or the operating STA, when performing 1024 quadrature amplitude modulation (QAM) or 4096 QAM or stream transmission of more than 8 streams, some or all of the underlined RU or MRU may not be allocated to only 20 MHz or the operating STA. For example, when performing 1024 QAM or 4096 QAM or stream transmission of more than 8 streams, among the aforementioned underlined RUs or MRUs, 26+52 RU and 26+106 RU and all 242 RUs may not be allocated to only 20 MHz or the operating STA.

[0254] Figure 18 is a process flow chart showing the operation of the transmitting device according to the present embodiment.

[0255] Figure 18 Examples of can be executed by the transmitting STA or the transmitting device (AP and / or non-AP STA).

[0256] can be skipped (or omitted) or changed Figure 18 Some steps (or the detailed sub-steps to be described later) in the examples of.

[0257] By executing step S1810, the transmitting device (transmitting STA) can obtain information related to the above tone plan. As described above, the information related to the tone plan includes RU size, RU position, control information related to the RU, information related to the frequency band including the RU, information about the STA receiving the RU, etc.

[0258] By performing step S1820, the transmitting device can configure / generate a PPDU based on the obtained control information. The step of configuring / generating a PPDU may include steps of configuring / generating each field of the PPDU. That is, step S1820 includes a step of configuring an EHT-SIG field including control information related to a tone plan. That is, step S1820 may include a step of configuring a field including control information (e.g., an N-bit map) indicating an RU size / location and / or a step of configuring a field including an identifier (e.g., an AID) of a STA receiving the RU.

[0259] In addition, step S1820 may include a step of generating an STF / LTF sequence transmitted through a specific RU. The STF / LTF sequence may be generated based on a preset STF generation sequence / LTF generation sequence.

[0260] In addition, step S1820 may include a step of generating a data field (i.e., an MPDU) transmitted through a specific RU.

[0261] The transmitting device may transmit the PPDU configured by performing step S1820 to the receiving device based on step S1830.

[0262] While performing step S1830, the transmitting device may perform at least one of operations such as CSD, spatial mapping, IDFT / IFFT operations, GI insertion, etc.

[0263] The signals / fields / sequences configured according to this specification can be transmitted in Figure 10 the format of.

[0264] Figure 19 is a process flow diagram showing the operations of the receiving device according to this embodiment.

[0265] It can be received according to Figure 18 the example of.

[0266] Figure 19 The example of can be executed by the receiving STA or the receiving device (AP and / or non-AP STA).

[0267] Some steps (or detailed sub-steps to be described later) in the example of can be skipped (or omitted). Figure 19 of.

[0268] The receiving device (receiving STA) can receive all or part of the PPDU by performing step S1910. The received signal may have Figure 10 the format shown in.

[0269] It can be based on Figure 18The sub - steps of step S1910 are determined by step S1830. That is, step S1910 may perform operations to restore (or re - configure) the results of operations such as CSD, spatial mapping, IDFT / IFFT operations, GI insertion, etc. applied in step S1830.

[0270] In step S1920, the receiving device may decode all / part of the PPDU. Additionally, the receiving device may obtain control information related to the tone plan (i.e., RU) from the decoded PPDU.

[0271] More specifically, the receiving device may decode the L - SIG and EHT - SIG of the PPDU based on the legacy STF / LTF, and may obtain the information included in the L - SIG and EHT SIG fields. Information related to various tone plans (i.e., RUs) specified in this specification may be included in the EHT - SIG, and the receiving STA may obtain information related to the tone plan (i.e., RU) through the EHT - SIG.

[0272] In step S1930, the receiving device may decode the remaining part of the PPDU based on the information related to the tone plan (i.e., RU) obtained by performing step S1920. For example, the receiving STA may decode the STF / LTF field of the PPDU based on the information related to the tone plan (i.e., RU). Additionally, the receiving STA may decode the data field of the PPDU based on the information related to the tone plan (i.e., RU), and may obtain the MPDU included in the data field.

[0273] Additionally, the receiving device may perform a processing operation of forwarding (or delivering) the decoded data decoded by performing step S1930 to a higher layer (e.g., the MAC layer). Additionally, in the case where the higher layer indicates signal generation to the PHY layer to deliver data to the higher layer, subsequent operations may be performed.

[0274] Hereinafter, reference will be made to Figures 1 to 19 Describe the above - mentioned embodiments in more detail.

[0275] Figure 20 is a flowchart showing the process of allocation performed by the AP by restricting the RU or MRU of the STA operating only in the 20MHz band according to this embodiment.

[0276] Figure 20 Examples of this can be executed in a network environment that supports the next - generation WLAN system (IEEE 802.11be or EHT WLAN system). The next - generation wireless LAN system is a WLAN system enhanced from the 802.11ax system and can thus satisfy backward compatibility with the 802.11ax system.

[0277] Figure 20 Examples of can be performed by a transmitting station (STA), and the transmitting STA can correspond to an access point (AP) STA. Figure 20 The receiving STA of

[0277] can correspond to a non-AP STA that operates only in the 20 MHz band.

[0278] This embodiment proposes a method for configuring resource units (RUs) and multiple RUs (MRUs) that cannot be allocated (restricted (or constrained) for allocation) to STAs operating only in the 20 MHz band based on the 80 MHz band tone plan newly defined in the 802.11be WLAN system.

[0279] In step S2010, the transmitting STA generates a physical protocol data unit (PPDU).

[0280] In step S2020, the transmitting STA sends the PPDU to the receiving STA through a preset frequency band.

[0281] The receiving STA is an STA that operates only in the 20 MHz band.

[0282] The PPDU includes a preamble and a data field. Also, the data field is received through resources among the preset frequency bands except for the first resource unit (RU) and the first multiple RUs (MRU). The first MRU is newly defined in the 802.11be wireless LAN system as multiple RUs that aggregate 2 RUs.

[0283] When the preset frequency band is the 40 MHz band, the RU layout (or tone plan) for the 40 MHz band is as follows. The tone plan for the 40 MHz band is the same in the 802.11ax and 802.11be WLAN systems.

[0284] When the 40 MHz band consists only of 26-tone RUs, the 40 MHz band includes the 1st to 18th 26-tone RUs. When the 40 MHz band consists only of 52-tone RUs, the 40 MHz band includes the 1st to 8th 52-tone RUs. When the 40 MHz band consists only of 106-tone RUs, the 40 MHz band includes the 1st to 4th 106-tone RUs. And when the 40 MHz band consists only of 242-tone RUs, the 40 MHz band includes the 1st and 2nd 242-tone RUs.

[0285] At this time, the 1st to 18th 26-tone RUs can be arranged in the order from the 26-tone RU with a low frequency to the 26-tone RU with a high frequency. The 1st to 8th 52-tone RUs can be arranged in the order from the 52-tone RU with a low frequency to the 52-tone RU with a high frequency. The 1st to 4th 106-tone RUs can be arranged in the order from the 106-tone RU with a low frequency to the 106-tone RU with a high frequency. And, the 1st and 2nd 242-tone RUs can be arranged in the order from the 242-tone RU with a low frequency to the 242-tone RU with a high frequency.

[0286] The first RU includes the 5th and 14th 26-tone RUs and the 1st and 2nd 242-tone RUs. That is, the 5th and 14th 26-tone RUs and the 1st and 2nd 242-tone RUs correspond to the resources not allocated to the receiving STA.

[0287] The first MRU includes: the MRU aggregating the 5th 26-tone RU and the 2nd 52-tone RU, the MRU aggregating the 14th 26-tone RU and the 6th 52-tone RU, the MRU aggregating the 5th 26-tone RU and the 1st 106-tone RU, the MRU aggregating the 5th 26-tone RU and the 2nd 106-tone RU, the MRU aggregating the 14th 26-tone RU and the 3rd 106-tone RU, and the MRU aggregating the 14th 26-tone RU and the 4th 106-tone RU. That is, the multiple RUs included in the first MRU also correspond to the resources not allocated to the receiving STA.

[0288] This embodiment proposes a method according to which, when the receiving STA receives an OFDMA PPDU through a 40 MHz band, the receiving STA is only allocated to the remaining units (RUs) except the first RU and the first MRU. Therefore, the present disclosure can have a new effect of being able to prevent the performance degradation and interference of adjacent channels by preventing data from being loaded on the tones corresponding to the DC tone and the guard tone at 20 MHz where the receiving STA can operate.

[0289] In addition, when a receiving STA operating only in a 20 MHz band receives an OFDMA PPDU through an 80 MHz band, a method of allocating the receiving STA only to the resource units except the first RU and the first MRU can be proposed as follows.

[0290] When the preset frequency band is the 80 MHz band, the layout (or tone plan) of the RU for the 80 MHz band is as described below. Since the tone plan for the 80 MHz band proposed in the 802.11be WLAN system is different from the tone plan for the 80 MHz band proposed in the 802.11ax WLAN system, it is necessary to reset (or configure) the RU and MRU limits.

[0291] When the 80 MHz band consists only of 26-tone RUs, the 80 MHz band can include the 1st to 36th 26-tone RUs. When the 80 MHz band consists only of 52-tone RUs, the 80 MHz band can include the 1st to 16th 52-tone RUs. When the 80 MHz band consists only of 106-tone RUs, the 80 MHz band can include the 1st to 8th 106-tone RUs. And when the 80 MHz band consists only of 242-tone RUs, the 80 MHz band can include the 1st to 4th 242-tone RUs.

[0292] At this time, the 1st to 36th 26-tone RUs can be arranged in the order from the 26-tone RU with a lower frequency to the 26-tone RU with a higher frequency, the 1st to 16th 52-tone RUs can be arranged in the order from the 52-tone RU with a lower frequency to the 52-tone RU with a higher frequency, the 1st to 8th 106-tone RUs can be arranged in the order from the 106-tone RU with a lower frequency to the 106-tone RU with a higher frequency, and the 1st to 4th 242-tone RUs can be arranged in the order from the 242-tone RU with a lower frequency to the 242-tone RU with a higher frequency.

[0293] The first RU can include the 5th, 14th, 23rd, and 32nd 26-tone RUs and the 1st to 4th 242-tone RUs. That is, the 5th, 14th, 23rd, and 32nd 26-tone RUs and the 1st to 4th 242-tone RUs correspond to the resources not allocated to the receiving STA.

[0294] The first MRU can include: the MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, the MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, the MRU that aggregates the 23rd 26-tone RU and the 10th 52-tone RU, the MRU that aggregates the 32nd 26-tone RU and the 14th 52-tone RU, the MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, the MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU, the MRU that aggregates the 23rd 26-tone RU and the 5th 106-tone RU, and the MRU that aggregates the 32nd 26-tone RU and the 8th 106-tone RU. That is, the multiple RUs included in the first MRU also correspond to the resources not allocated to the receiving STA.

[0295] In addition, when a receiving STA operating only in the 20 MHz band receives an OFDMA PPDU through the 160 MHz band, a method of allocating the receiving STA only to resource units other than the first RU and the first MRU can be proposed as described below.

[0296] When the preset band is the 160 MHz band, the layout (or tone plan) of the RUs for the 160 MHz band is as described below. The tone plan for the 160 MHz band proposed in the 802.11be WLAN system is the same as the tone plan in which the tone plan for the 80 MHz band proposed in the 802.11be WLAN system is repeated twice. The 160 MHz band can include first and second 80 MHz sub-channels.

[0297] When the first 80 MHz sub-channel consists only of 26-tone RUs, the first 80 MHz sub-channel can include the 1st to 36th 26-tone RUs. When the first 80 MHz sub-channel consists only of 52-tone RUs, the first 80 MHz sub-channel can include the 1st to 16th 52-tone RUs. When the first 80 MHz sub-channel consists only of 106-tone RUs, the first 80 MHz sub-channel can include the 1st to 8th 106-tone RUs. And when the first 80 MHz sub-channel consists only of 242-tone RUs, the first 80 MHz sub-channel can include the 1st to 4th 242-tone RUs.

[0298] When the second 80 MHz sub-channel consists only of 26-tone RUs, the second 80 MHz sub-channel can include the 37th to 72nd 26-tone RUs. When the second 80 MHz sub-channel consists only of 52-tone RUs, the second 80 MHz sub-channel can include the 17th to 32nd 52-tone RUs. When the second 80 MHz sub-channel consists only of 106-tone RUs, the second 80 MHz sub-channel can include the 9th to 16th 106-tone RUs. And when the second 80 MHz sub-channel consists only of 242-tone RUs, the second 80 MHz sub-channel can include the 5th to 8th 242-tone RUs.

[0299] At this time, the 1st to 72nd 26-tone RUs can be arranged in the order from the 26-tone RU with a lower frequency to the 26-tone RU with a higher frequency. The 1st to 36th 52-tone RUs can be arranged in the order from the 52-tone RU with a lower frequency to the 52-tone RU with a higher frequency. The 1st to 16th 106-tone RUs can be arranged in the order from the 106-tone RU with a lower frequency to the 106-tone RU with a higher frequency. And the 1st to 8th 242-tone RUs can be arranged in the order from the 242-tone RU with a lower frequency to the 242-tone RU with a higher frequency.

[0300] The first RU includes the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26-tone RUs and the 1st to 8th 242-tone RUs. That is, the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26-tone RUs and the 1st to 8th 242-tone RUs correspond to resources not allocated to the receiving STA.

[0301] The first MRU may include: an MRU aggregating the 5th 26-tone RU and the 2nd 52-tone RU, an MRU aggregating the 14th 26-tone RU and the 6th 52-tone RU, an MRU aggregating the 23rd 26-tone RU and the 10th 52-tone RU, an MRU aggregating the 32nd 26-tone RU and the 14th 52-tone RU, an MRU aggregating the 41st 26-tone RU and the 18th 52-tone RU, an MRU aggregating the 50th 26-tone RU and the 22nd 52-tone RU, an MRU aggregating the 59th 26-tone RU and the 26th 52-tone RU, an MRU aggregating the 68th 26-tone RU and the 30th 52-tone RU, an MRU aggregating the 5th 26-tone RU and the 1st 106-tone RU, an MRU aggregating the 14th 26-tone RU and the 4th 106-tone RU, an MRU aggregating the 23rd 26-tone RU and the 5th 106-tone RU, and an MRU aggregating the 32nd 26-tone RU and the 8th 106-tone RU, an MRU aggregating the 41st 26-tone RU and the 9th 106-tone RU, an MRU aggregating the 50th 26-tone RU and the 12th 106-tone RU, an MRU aggregating the 59th 26-tone RU and the 13th 106-tone RU, and an MRU aggregating the 68th 26-tone RU and the 16th 106-tone RU. That is, the multiple RUs included in the first MRU also correspond to resources not allocated to the receiving STA.

[0302] In addition, when a receiving STA operating only in the 20MHz band receives an OFDMA PPDU through the 320MHz band, a method of allocating the receiving STA only to resource units other than the first RU and the first MRU can be proposed as described below.

[0303] When the preset band is the 320MHz band, the layout (or tone plan) of the RUs for the 320MHz band is as described below. The tone plan for the 320MHz band proposed in the 802.11be WLAN system is the same as the tone plan that repeats four times the tone plan for the 80MHz band proposed in the 802.11be WLAN system. The 320MHz band may include the 1st to 4th 80MHz sub-channels.

[0304] When the first 80 MHz sub-channel consists only of 26-tone RUs, the first 80 MHz sub-channel may include the 1st to 36th 26-tone RUs; when the first 80 MHz sub-channel consists only of 52-tone RUs, the first 80 MHz sub-channel may include the 1st to 16th 52-tone RUs; when the first 80 MHz sub-channel consists only of 106-tone RUs, the first 80 MHz sub-channel may include the 1st to 8th 106-tone RUs; and when the first 80 MHz sub-channel consists only of 242-tone RUs, the first 80 MHz sub-channel may include the 1st to 4th 242-tone RUs.

[0305] When the second 80 MHz sub-channel consists only of 26-tone RUs, the second 80 MHz sub-channel may include the 37th to 72nd 26-tone RUs; when the second 80 MHz sub-channel consists only of 52-tone RUs, the second 80 MHz sub-channel may include the 17th to 32nd 52-tone RUs; when the second 80 MHz sub-channel consists only of 106-tone RUs, the second 80 MHz sub-channel may include the 9th to 16th 106-tone RUs; and when the second 80 MHz sub-channel consists only of 242-tone RUs, the second 80 MHz sub-channel may include the 5th to 8th 242-tone RUs.

[0306] When the third 80 MHz sub-channel consists only of 26-tone RUs, the third 80 MHz sub-channel may include the 73rd to 108th 26-tone RUs; when the third 80 MHz sub-channel consists only of 52-tone RUs, the third 80 MHz sub-channel may include the 33rd to 48th 52-tone RUs; when the third 80 MHz sub-channel consists only of 106-tone RUs, the third 80 MHz sub-channel may include the 17th to 24th 106-tone RUs; and when the third 80 MHz sub-channel consists only of 242-tone RUs, the third 80 MHz sub-channel may include the 9th to 12th 242-tone RUs.

[0307] When the fourth 80 MHz sub-channel consists only of 26-tone RUs, the fourth 80 MHz sub-channel may include the 109th to 144th 26-tone RUs; when the fourth 80 MHz sub-channel consists only of 52-tone RUs, the fourth 80 MHz sub-channel may include the 49th to 64th 52-tone RUs; when the fourth 80 MHz sub-channel consists only of 106-tone RUs, the fourth 80 MHz sub-channel may include the 25th to 32nd 106-tone RUs; and when the fourth 80 MHz sub-channel consists only of 242-tone RUs, the fourth 80 MHz sub-channel may include the 13th to 16th 242-tone RUs.

[0308] At this time, the 1st to 144th 26-tone RUs can be arranged in the order from the 26-tone RU with a low frequency to the 26-tone RU with a high frequency, the 1st to 64th 52-tone RUs can be arranged in the order from the 52-tone RU with a low frequency to the 52-tone RU with a high frequency, the 1st to 32nd 106-tone RUs can be arranged in the order from the 106-tone RU with a low frequency to the 106-tone RU with a high frequency, and the 1st to 16th 242-tone RUs can be arranged in the order from the 242-tone RU with a low frequency to the 242-tone RU with a high frequency.

[0309] The first RU may include the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st, and 140th 26-tone RUs and the 1st to 16th 242-tone RUs. That is, the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st, and 140th 26-tone RUs and the 1st to 16th 242-tone RUs correspond to the resources not allocated to the receiving STA.

[0310] The first MRU may include: an MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, an MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, an MRU that aggregates the 23rd 26-tone RU and the 10th 52-tone RU, an MRU that aggregates the 32nd 26-tone RU and the 14th 52-tone RU, an MRU that aggregates the 41st 26-tone RU and the 18th 52-tone RU, an MRU that aggregates the 50th 26-tone RU and the 22nd 52-tone RU, an MRU that aggregates the 59th 26-tone RU and the 26th 52-tone RU, an MRU that aggregates the 68th 26-tone RU and the 30th 52-tone RU, an MRU that aggregates the 77th 26-tone RU and the 34th 52-tone RU, an MRU that aggregates the 86th 26-tone RU and the 38th 52-tone RU, an MRU that aggregates the 95th 26-tone RU and the 42nd 52-tone RU, an MRU that aggregates the 104th 26-tone RU and the 46th 52-tone RU, an MRU that aggregates the 113th 26-tone RU and the 50th 52-tone RU, an MRU that aggregates the 122nd 26-tone RU and the 54th 52-tone RU, an MRU that aggregates the 131st 26-tone RU and the 58th 52-tone RU, an MRU that aggregates the 140th 26-tone RU and the 62nd 52-tone RU, an MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, an MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU, an MRU that aggregates the 23rd 26-tone RU and the 5th 106-tone RU, and an MRU that aggregates the 32nd 26-tone RU and the 8th 106-tone RU, an MRU that aggregates the 41st 26-tone RU and the 9th 106-tone RU, an MRU that aggregates the 50th 26-tone RU and the 12th 106-tone RU, an MRU that aggregates the 59th 26-tone RU and the 13th 106-tone RU, and an MRU that aggregates the 68th 26-tone RU and the 16th 106-tone RU, an MRU that aggregates the 77th 26-tone RU and the 17th 106-tone RU, an MRU that aggregates the 86th 26-tone RU and the 20th 106-tone RU, an MRU that aggregates the 95th 26-tone RU and the 21st 106-tone RU, and an MRU that aggregates the 104th 26-tone RU and the 24th 106-tone RU, an MRU that aggregates the 113th 26-tone RU and the 25th 106-tone RU, an MRU that aggregates the 122nd 26-tone RU and the 28th 106-tone RU, an MRU that aggregates the 131st 26-tone RU and the 29th 106-tone RU, and an MRU that aggregates the 140th 26-tone RU and the 32nd 106-tone RU. That is, the multiple RUs included in the first MRU also correspond to resources not allocated to the receiving STA.

[0311] The PPDU can be a DL OFDMA PPDU or a UL OFDMA PPDU. When the PPDU is a DL OFDMA PPDU, the transmitting STA can send an extremely high throughput (EHT) multi-user (MU) PPDU to the receiving STA, and the receiving STA can decode the EHT MU PPDU through the resources among the preset frequency bands except for the first RU and the first MRU. And when the PPDU is an uplink (UL) OFDMA PPDU, the transmitting STA is a STA operating only in the 20 MHz band, and the transmitting STA receives a trigger frame from the receiving STA (herein, the AP). And the transmitting STA can send a trigger-based (TB) PPDU to the receiving STA. At this time, the EHT TB PPDU can be sent through the resources among the preset frequency bands except for the first RU and the first MRU. The EHT MU PPDU can include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a repeated L-SIG (RL-SIG), a universal signal (U-SIG), an EHT-SIG, an EHT-STF, and an EHT-LTF data field. The EHT TB PPDU is defined as a format excluding the EHT-SIG from the EHT MU PPDU.

[0312] In addition, when the PPDU is a DL OFDMA PPDU, the 242-tone RU included in the preset frequency band can be optionally allocated. For example, when the PPDU is a DL OFDMA PPDU received through the 40 MHz band, the first RU can optionally include the first and second 242-tone RUs. That is, the transmitting STA can optionally allocate the first and second 242 RU tones to the receiving STA. If the first RU only includes the first 242-tone RU and does not include the second 242-tone RU, the receiving STA can receive the DL OFDMA PPDU through the second 242-tone RU (in the case where the receiving STA has the capability for the second 242-tone RU). This can also be applied in the same way when the preset frequency band is an 80 MHz, 160 MHz, or 320 MHz band.

[0313] Figure 21 It is a flowchart showing the process of receiving allocation by a STA operating only in the 20 MHz band by restricting the RU or MRU according to the present embodiment.

[0314] Figure 21 Examples can be executed in a network environment supporting the next-generation WLAN system. The next-generation wireless LAN system is a WLAN system enhanced from the 802.11ax system and can thus satisfy backward compatibility with the 802.11ax system.

[0315] Figure 21Examples can be performed by a receiving station (STA), and the receiving STA can correspond to a non-AP STA that operates only in the 20 MHz band. Figure 21 The transmitting STA of can correspond to an access point (AP) STA.

[0316] This embodiment proposes a method for configuring resource units (RUs) and multi-RUs (MRUs) that cannot be allocated (restricted (or constrained) for allocation) to STAs operating only in the 20 MHz band based on the 80 MHz band tone plan newly defined in the 802.11be WLAN system.

[0317] In step S2110, a receiving station (STA) receives a physical protocol data unit (PPDU) from a transmitting STA through a preset frequency band.

[0318] In step S2120, the receiving STA decodes the PPDU.

[0319] The receiving STA is an STA that operates only in the 20 MHz band.

[0320] The PPDU includes a preamble and a data field. Also, the data field is received through resources among the preset frequency bands except for the first resource unit (RU) and the first multi-RU (MRU). The first MRU is newly defined in the 802.11be wireless LAN system as a multi-RU that aggregates 2 RUs.

[0321] When the preset frequency band is the 40 MHz band, the RU layout (or tone plan) for the 40 MHz band is as follows. The tone plan for the 40 MHz band is the same in the 802.11ax and 802.11be WLAN systems.

[0322] When the 40 MHz band consists only of 26-tone RUs, the 40 MHz band includes the 1st to 18th 26-tone RUs. When the 40 MHz band consists only of 52-tone RUs, the 40 MHz band includes the 1st to 8th 52-tone RUs. When the 40 MHz band consists only of 106-tone RUs, the 40 MHz band includes the 1st to 4th 106-tone RUs. And when the 40 MHz band consists only of 242-tone RUs, the 40 MHz band includes the 1st and 2nd 242-tone RUs.

[0323] At this time, the 1st to 18th 26-tone RUs can be arranged in the order from the 26-tone RU with a low frequency to the 26-tone RU with a high frequency. The 1st to 8th 52-tone RUs can be arranged in the order from the 52-tone RU with a low frequency to the 52-tone RU with a high frequency. The 1st to 4th 106-tone RUs can be arranged in the order from the 106-tone RU with a low frequency to the 106-tone RU with a high frequency. And, the 1st and 2nd 242-tone RUs can be arranged in the order from the 242-tone RU with a low frequency to the 242-tone RU with a high frequency.

[0324] The 1st RU includes the 5th and 14th 26-tone RUs and the 1st and 2nd 242-tone RUs. That is, the 5th and 14th 26-tone RUs and the 1st and 2nd 242-tone RUs correspond to the resources not allocated to the receiving STA.

[0325] The 1st MRU includes: the MRU aggregating the 5th 26-tone RU and the 2nd 52-tone RU, the MRU aggregating the 14th 26-tone RU and the 6th 52-tone RU, the MRU aggregating the 5th 26-tone RU and the 1st 106-tone RU, the MRU aggregating the 5th 26-tone RU and the 2nd 106-tone RU, the MRU aggregating the 14th 26-tone RU and the 3rd 106-tone RU, and the MRU aggregating the 14th 26-tone RU and the 4th 106-tone RU. That is, the multiple RUs included in the 1st MRU also correspond to the resources not allocated to the receiving STA.

[0326] This embodiment proposes a method according to which, when the receiving STA receives an OFDMA PPDU through a 40 MHz band, the receiving STA is only allocated to the remaining units (RUs) except for the 1st RU and the 1st MRU. Therefore, the present disclosure can have a new effect of being able to prevent the performance degradation and interference of adjacent channels by preventing data from being loaded on the tones corresponding to the DC tone and the guard tone at 20 MHz where the receiving STA can operate.

[0327] In addition, when the receiving STA operating only in the 20 MHz band receives an OFDMA PPDU through an 80 MHz band, a method of allocating the receiving STA only to the resource units except for the 1st RU and the 1st MRU can be proposed as described below.

[0328] When the preset frequency band is the 80 MHz band, the layout (or tone plan) of the RU for the 80 MHz band is as described below. Since the tone plan for the 80 MHz band proposed in the 802.11be WLAN system is different from the tone plan for the 80 MHz band proposed in the 802.11ax WLAN system, it is necessary to reset (or configure) the RU and MRU limits.

[0329] When the 80 MHz band consists only of 26-tone RUs, the 80 MHz band can include the 1st to 36th 26-tone RUs. When the 80 MHz band consists only of 52-tone RUs, the 80 MHz band can include the 1st to 16th 52-tone RUs. When the 80 MHz band consists only of 106-tone RUs, the 80 MHz band can include the 1st to 8th 106-tone RUs. And when the 80 MHz band consists only of 242-tone RUs, the 80 MHz band can include the 1st to 4th 242-tone RUs.

[0330] At this time, the 1st to 36th 26-tone RUs can be arranged in the order from the 26-tone RU with a lower frequency to the 26-tone RU with a higher frequency, the 1st to 16th 52-tone RUs can be arranged in the order from the 52-tone RU with a lower frequency to the 52-tone RU with a higher frequency, the 1st to 8th 106-tone RUs can be arranged in the order from the 106-tone RU with a lower frequency to the 106-tone RU with a higher frequency, and the 1st to 4th 242-tone RUs can be arranged in the order from the 242-tone RU with a lower frequency to the 242-tone RU with a higher frequency.

[0331] The first RU can include the 5th, 14th, 23rd, and 32nd 26-tone RUs and the 1st to 4th 242-tone RUs. That is, the 5th, 14th, 23rd, and 32nd 26-tone RUs and the 1st to 4th 242-tone RUs correspond to the resources not allocated to the receiving STA.

[0332] The first MRU can include: the MRU aggregating the 5th 26-tone RU and the 2nd 52-tone RU, the MRU aggregating the 14th 26-tone RU and the 6th 52-tone RU, the MRU aggregating the 23rd 26-tone RU and the 10th 52-tone RU, the MRU aggregating the 32nd 26-tone RU and the 14th 52-tone RU, the MRU aggregating the 5th 26-tone RU and the 1st 106-tone RU, the MRU aggregating the 14th 26-tone RU and the 4th 106-tone RU, the MRU aggregating the 23rd 26-tone RU and the 5th 106-tone RU, and the MRU aggregating the 32nd 26-tone RU and the 8th 106-tone RU. That is, the multiple RUs included in the first MRU also correspond to the resources not allocated to the receiving STA.

[0333] In addition, when a receiving STA operating only in the 20 MHz band receives an OFDMA PPDU through the 160 MHz band, a method of allocating the receiving STA only to resource units other than the first RU and the first MRU can be proposed as described below.

[0334] When the preset band is the 160 MHz band, the layout (or tone plan) of the RUs for the 160 MHz band is as described below. The tone plan for the 160 MHz band proposed in the 802.11be WLAN system is the same as the tone plan obtained by repeating twice the tone plan for the 80 MHz band to be proposed in the 802.11be WLAN system. The 160 MHz band can include first and second 80 MHz sub-channels.

[0335] When the first 80 MHz sub-channel consists only of 26-tone RUs, the first 80 MHz sub-channel can include the 1st to 36th 26-tone RUs. When the first 80 MHz sub-channel consists only of 52-tone RUs, the first 80 MHz sub-channel can include the 1st to 16th 52-tone RUs. When the first 80 MHz sub-channel consists only of 106-tone RUs, the first 80 MHz sub-channel can include the 1st to 8th 106-tone RUs. And when the first 80 MHz sub-channel consists only of 242-tone RUs, the first 80 MHz sub-channel can include the 1st to 4th 242-tone RUs.

[0336] When the second 80 MHz sub-channel consists only of 26-tone RUs, the second 80 MHz sub-channel can include the 37th to 72nd 26-tone RUs. When the second 80 MHz sub-channel consists only of 52-tone RUs, the second 80 MHz sub-channel can include the 17th to 32nd 52-tone RUs. When the second 80 MHz sub-channel consists only of 106-tone RUs, the second 80 MHz sub-channel can include the 9th to 16th 106-tone RUs. And when the second 80 MHz sub-channel consists only of 242-tone RUs, the second 80 MHz sub-channel can include the 5th to 8th 242-tone RUs.

[0337] At this time, the 1st to 72nd 26-tone RUs can be arranged in the order from the 26-tone RU with a lower frequency to the 26-tone RU with a higher frequency, the 1st to 36th 52-tone RUs can be arranged in the order from the 52-tone RU with a lower frequency to the 52-tone RU with a higher frequency, the 1st to 16th 106-tone RUs can be arranged in the order from the 106-tone RU with a lower frequency to the 106-tone RU with a higher frequency, and the 1st to 8th 242-tone RUs can be arranged in the order from the 242-tone RU with a lower frequency to the 242-tone RU with a higher frequency.

[0338] The first RU includes the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26-tone RUs and the 1st to 8th 242-tone RUs. That is, the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26-tone RUs and the 1st to 8th 242-tone RUs correspond to resources not allocated to the receiving STA.

[0339] The first MRU may include: an MRU aggregating the 5th 26-tone RU and the 2nd 52-tone RU, an MRU aggregating the 14th 26-tone RU and the 6th 52-tone RU, an MRU aggregating the 23rd 26-tone RU and the 10th 52-tone RU, an MRU aggregating the 32nd 26-tone RU and the 14th 52-tone RU, an MRU aggregating the 41st 26-tone RU and the 18th 52-tone RU, an MRU aggregating the 50th 26-tone RU and the 22nd 52-tone RU, an MRU aggregating the 59th 26-tone RU and the 26th 52-tone RU, an MRU aggregating the 68th 26-tone RU and the 30th 52-tone RU, an MRU aggregating the 5th 26-tone RU and the 1st 106-tone RU, an MRU aggregating the 14th 26-tone RU and the 4th 106-tone RU, an MRU aggregating the 23rd 26-tone RU and the 5th 106-tone RU, and an MRU aggregating the 32nd 26-tone RU and the 8th 106-tone RU, an MRU aggregating the 41st 26-tone RU and the 9th 106-tone RU, an MRU aggregating the 50th 26-tone RU and the 12th 106-tone RU, an MRU aggregating the 59th 26-tone RU and the 13th 106-tone RU, and an MRU aggregating the 68th 26-tone RU and the 16th 106-tone RU. That is, the multiple RUs included in the first MRU also correspond to resources not allocated to the receiving STA.

[0340] In addition, when a receiving STA operating only in the 20MHz band receives an OFDMA PPDU through the 320MHz band, a method of allocating the receiving STA only to resource units other than the first RU and the first MRU can be proposed as described below.

[0341] When the preset band is the 320MHz band, the layout (or tone plan) of the RUs for the 320MHz band is as described below. The tone plan for the 320MHz band proposed in the 802.11be WLAN system is the same as the tone plan obtained by repeating four times the tone plan for the 80MHz band to be proposed in the 802.11be WLAN system. The 320MHz band may include the 1st to 4th 80MHz sub-channels.

[0342] When the first 80 MHz sub-channel consists only of 26-tone RUs, the first 80 MHz sub-channel may include the 1st to 36th 26-tone RUs; when the first 80 MHz sub-channel consists only of 52-tone RUs, the first 80 MHz sub-channel may include the 1st to 16th 52-tone RUs; when the first 80 MHz sub-channel consists only of 106-tone RUs, the first 80 MHz sub-channel may include the 1st to 8th 106-tone RUs; and when the first 80 MHz sub-channel consists only of 242-tone RUs, the first 80 MHz sub-channel may include the 1st to 4th 242-tone RUs.

[0343] When the second 80 MHz sub-channel consists only of 26-tone RUs, the second 80 MHz sub-channel may include the 37th to 72nd 26-tone RUs; when the second 80 MHz sub-channel consists only of 52-tone RUs, the second 80 MHz sub-channel may include the 17th to 32nd 52-tone RUs; when the second 80 MHz sub-channel consists only of 106-tone RUs, the second 80 MHz sub-channel may include the 9th to 16th 106-tone RUs; and when the second 80 MHz sub-channel consists only of 242-tone RUs, the second 80 MHz sub-channel may include the 5th to 8th 242-tone RUs.

[0344] When the third 80 MHz sub-channel consists only of 26-tone RUs, the third 80 MHz sub-channel may include the 73rd to 108th 26-tone RUs; when the third 80 MHz sub-channel consists only of 52-tone RUs, the third 80 MHz sub-channel may include the 33rd to 48th 52-tone RUs; when the third 80 MHz sub-channel consists only of 106-tone RUs, the third 80 MHz sub-channel may include the 17th to 24th 106-tone RUs; and when the third 80 MHz sub-channel consists only of 242-tone RUs, the third 80 MHz sub-channel may include the 9th to 12th 242-tone RUs.

[0345] When the fourth 80 MHz sub-channel consists only of 26-tone RUs, the fourth 80 MHz sub-channel may include the 109th to 144th 26-tone RUs; when the fourth 80 MHz sub-channel consists only of 52-tone RUs, the fourth 80 MHz sub-channel may include the 49th to 64th 52-tone RUs; when the fourth 80 MHz sub-channel consists only of 106-tone RUs, the fourth 80 MHz sub-channel may include the 25th to 32nd 106-tone RUs; and when the fourth 80 MHz sub-channel consists only of 242-tone RUs, the fourth 80 MHz sub-channel may include the 13th to 16th 242-tone RUs.

[0346] At this time, the 1st to 144th 26-tone RUs can be arranged in the order from the 26-tone RU with a low frequency to the 26-tone RU with a high frequency, the 1st to 64th 52-tone RUs can be arranged in the order from the 52-tone RU with a low frequency to the 52-tone RU with a high frequency, the 1st to 32nd 106-tone RUs can be arranged in the order from the 106-tone RU with a low frequency to the 106-tone RU with a high frequency, and the 1st to 16th 242-tone RUs can be arranged in the order from the 242-tone RU with a low frequency to the 242-tone RU with a high frequency.

[0347] The first RU may include the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st, and 140th 26-tone RUs and the 1st to 16th 242-tone RUs. That is, the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st, and 140th 26-tone RUs and the 1st to 16th 242-tone RUs correspond to the resources not allocated to the receiving STA.

[0348] The first MRU may include: an MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, an MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, an MRU that aggregates the 23rd 26-tone RU and the 10th 52-tone RU, an MRU that aggregates the 32nd 26-tone RU and the 14th 52-tone RU, an MRU that aggregates the 41st 26-tone RU and the 18th 52-tone RU, an MRU that aggregates the 50th 26-tone RU and the 22nd 52-tone RU, an MRU that aggregates the 59th 26-tone RU and the 26th 52-tone RU, an MRU that aggregates the 68th 26-tone RU and the 30th 52-tone RU, an MRU that aggregates the 77th 26-tone RU and the 34th 52-tone RU, an MRU that aggregates the 86th 26-tone RU and the 38th 52-tone RU, an MRU that aggregates the 95th 26-tone RU and the 42nd 52-tone RU, an MRU that aggregates the 104th 26-tone RU and the 46th 52-tone RU, an MRU that aggregates the 113th 26-tone RU and the 50th 52-tone RU, an MRU that aggregates the 122nd 26-tone RU and the 54th 52-tone RU, an MRU that aggregates the 131st 26-tone RU and the 58th 52-tone RU, an MRU that aggregates the 140th 26-tone RU and the 62nd 52-tone RU, an MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, an MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU, an MRU that aggregates the 23rd 26-tone RU and the 5th 106-tone RU, and an MRU that aggregates the 32nd 26-tone RU and the 8th 106-tone RU, an MRU that aggregates the 41st 26-tone RU and the 9th 106-tone RU, an MRU that aggregates the 50th 26-tone RU and the 12th 106-tone RU, an MRU that aggregates the 59th 26-tone RU and the 13th 106-tone RU, and an MRU that aggregates the 68th 26-tone RU and the 16th 106-tone RU, an MRU that aggregates the 77th 26-tone RU and the 17th 106-tone RU, an MRU that aggregates the 86th 26-tone RU and the 20th 106-tone RU, an MRU that aggregates the 95th 26-tone RU and the 21st 106-tone RU, and an MRU that aggregates the 104th 26-tone RU and the 24th 106-tone RU, an MRU that aggregates the 113th 26-tone RU and the 25th 106-tone RU, an MRU that aggregates the 122nd 26-tone RU and the 28th 106-tone RU, an MRU that aggregates the 131st 26-tone RU and the 29th 106-tone RU, and an MRU that aggregates the 140th 26-tone RU and the 32nd 106-tone RU. That is to say, the multiple RUs included in the first MRU also correspond to resources not allocated to the receiving STA.

[0349] The PPDU can be a DL OFDMA PPDU or an UL OFDMA PPDU. When the PPDU is a DL OFDMA PPDU, the transmitting STA can send an Extremely High Throughput (EHT) Multi-User (MU) PPDU to the receiving STA, and the receiving STA can decode the EHT MU PPDU through resources other than the first RU and the first MRU among the preset frequency bands. Also, when the PPDU is an Uplink (UL) OFDMA PPDU, the transmitting STA is a STA operating only in the 20 MHz band, and the transmitting STA receives a trigger frame from the receiving STA (in this document, the AP). And the transmitting STA can send a Trigger-Based (TB) PPDU to the receiving STA. At this time, the EHT TB PPDU can be sent through resources other than the first RU and the first MRU among the preset frequency bands. The EHT MU PPDU can include a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal (L-SIG), a Repeated L-SIG (RL-SIG), a Universal Signal (U-SIG), an EHT-SIG, an EHT-STF, and an EHT-LTF data field. The EHT TB PPDU is defined as a format excluding the EHT-SIG from the EHT MU PPDU.

[0350] In addition, when the PPDU is a DL OFDMA PPDU, a 242-tone RU included in the preset frequency band can be optionally allocated. For example, when the PPDU is a DL OFDMA PPDU received through the 40 MHz band, the first RU can optionally include the first and second 242-tone RUs. That is, the transmitting STA can optionally allocate the first and second 242-tone RUs to the receiving STA. If the first RU only includes the first 242-tone RU and does not include the second 242-tone RU, the receiving STA can receive the DL OFDMA PPDU through the second 242-tone RU (in the case where the receiving STA has the capability for the second 242-tone RU). This can also be applied in the same way when the preset frequency band is an 80 MHz, 160 MHz, or 320 MHz band.

[0351] 4. Device Configuration

[0352] The above technical features of this specification can be applied to various devices and methods. For example, it can be achieved through Figure 1 and / or Figure 11 executing / supporting the above technical features of this specification. For example, the above technical features of this specification can be only applied to Figure 1 and / or Figure 11 a part of. For example, the above technical features of this specification can be based on Figure 1The processing chips 114 and 124 are implemented, or are implemented based on the processors 111 and 121 and the memories 112 and 122, or are implemented based on Figure 11 the processor 610 and the memory 620. For example, the device of this specification receives a physical protocol data unit (PPDU) from a sending station (STA) through a preset frequency band and decodes the PPDU.

[0353] The technical features of this specification can be implemented based on a computer-readable medium (CRM). For example, the CRM proposed in this specification is a computer-readable medium including instructions executed by at least one processor.

[0354] The CRM can store instructions for performing operations including receiving a physical protocol data unit (PPDU) from a sending station (STA) through a preset frequency band and decoding the PPDU. The instructions stored in the CRM of this specification can be executed by at least one processor. At least one processor related to the CRM of this specification can be Figure 1 the processors 111 and 121 or the processing chips 114 and 124, or Figure 11 the processor 610. At the same time, the CRM of this specification can be Figure 1 the memories 112 and 122 or Figure 11 the memory 620 or a separate external memory / storage medium / disk, etc.

[0355] The foregoing technical features of this specification are applicable to various applications or business models. For example, the foregoing technical features can be applied to the wireless communication of devices supporting artificial intelligence (AI).

[0356] Artificial intelligence refers to the research field related to artificial intelligence or methods for creating artificial intelligence, while machine learning refers to the research field related to methods for defining and solving various problems in the field of artificial intelligence. Machine learning is also defined as an algorithm for improving operational performance through a stable operational experience.

[0357] An artificial neural network (ANN) is a model used in machine learning and can refer to a model for overall problem-solving, including artificial neurons (nodes) that form a network by combining synapses. An artificial neural network can be defined by the connection pattern between neurons in different layers, the learning process of updating model parameters, and the activation function for generating output values.

[0358] An artificial neural network can include an input layer, an output layer, and optionally one or more hidden layers. Each layer includes one or more neurons, and an artificial neural network can include synapses connecting the neurons. In an artificial neural network, each neuron can output the function value of the activation function of the input signal input through synapses, weights, and biases.

[0359] Model parameters refer to the parameters determined through learning and include the weights of synaptic connections and the biases of neurons. Hyperparameters refer to the parameters to be set before learning in a machine learning algorithm and include the learning rate, the number of iterations, the mini-batch size, and the initialization function.

[0360] Learning an artificial neural network may aim to determine the model parameters for minimizing a loss function. The loss function can be used as a metric for determining the optimal model parameters during the process of learning an artificial neural network.

[0361] Machine learning can be classified into supervised learning, unsupervised learning, and reinforcement learning.

[0362] Supervised learning refers to a method of training an artificial neural network by using the labels given to the training data, where, when the training data is input into the artificial neural network, the labels can indicate the correct answers (or result values) that the artificial neural network needs to infer. Unsupervised learning can refer to a method of training an artificial neural network without the labels given to the training data. Reinforcement learning can refer to a training method for training an agent defined in an environment to select actions or sequences of actions to maximize the cumulative reward at each state.

[0363] Machine learning implemented in an artificial neural network using a deep neural network (DNN) including multiple hidden layers is called deep learning, and deep learning is a part of machine learning. Hereinafter, machine learning is explained as including deep learning.

[0364] The foregoing technical features can be applied to the wireless communication of a robot.

[0365] A robot can refer to a machine that automatically processes or operates a given task using its own capabilities. In particular, a robot having the function of recognizing the environment and making autonomous judgments to perform operations can be called an intelligent robot.

[0366] According to the use or field, robots can be classified into industrial, medical, household, military robots, etc. A robot can include an actuator or a driver including a motor to perform various physical operations, such as moving a robot joint. In addition, a mobile robot can include wheels, brakes, propellers, etc. in the driver to travel on the ground or fly in the air through the driver.

[0367] The foregoing technical features can be applied to a device supporting extended reality.

[0368] Extended reality collectively refers to virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology is a computer graphics technology that provides real-world objects and backgrounds only in CG images. AR technology is a computer graphics technology that provides virtual CG images on real object images. MR technology is a computer graphics technology that provides virtual objects that are mixed and combined with the real world.

[0369] MR technology is similar to AR technology in that real objects and virtual objects can be displayed together. However, in AR technology, virtual objects are used as a supplement to real objects, while in MR technology, virtual objects and real objects are used in an equal status.

[0370] XR technology can be applied to head-mounted displays (HMDs), head-up displays (HUDs), mobile phones, tablets, laptops, desktop computers, TVs, digital signage, etc. Devices that apply XR technology can be called XR devices.

[0371] The claims disclosed in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented as a device, and the technical features in the device claims of this specification can be combined to be implemented by a method. In addition, the technical features in the method claims and device claims of this specification can be combined to be implemented as a device. In addition, the technical features in the method claims and device claims of this specification can be combined to be implemented by a method.

Claims

1. A method in a wireless local area network (WLAN) system, the method comprising: A receiving station (STA) receives a physical protocol data unit (PPDU) from a transmitting STA via a preset frequency band; as well as The receiving STA decodes the PPDU, The receiving STA is a STA operating only in the 20 MHz band, The PPDU includes a preamble and a data field. wherein the data field is received through resources other than a first resource unit (RU) and a first plurality of RUs (MRUs) in the preset frequency band, Wherein, based on the preset frequency band being a 40 MHz band, the RU layout of the 40 MHz band, when only 26-tone RUs are provided, consists of the first to eighteenth 26-tone RUs; when only 52-tone RUs are provided, consists of the first to eighth 52-tone RUs; when only 106-tone RUs are provided, consists of the first to fourth 106-tone RUs; or when only 242-tone RUs are provided, consists of the first and second 242-tone RUs. wherein the first RU includes the 5th and 14th 26-tone RUs, wherein the first MRU is defined as a plurality of RUs having 2 RUs aggregated in the RU layout, and Among them, the first MRU includes: the MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, the MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, the MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, the MRU that aggregates the 5th 26-tone RU and the 2nd 106-tone RU, the MRU that aggregates the 14th 26-tone RU and the 3rd 106-tone RU, and the MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU.

2. The method according to claim 1, wherein: The first to eighteenth 26-tone RUs are arranged in order starting from the 26-tone RU with a low frequency to the 26-tone RU with a high frequency, wherein the first to eighth 52-tone RUs are arranged in order starting from a 52-tone RU having a low frequency to a 52-tone RU having a high frequency, Here, the first to fourth 106-tone RUs are arranged in order starting from the 106-tone RU with a low frequency to the 106-tone RU with a high frequency.

3. The method according to claim 1, wherein Based on the preset frequency band being an 80 MHz band, the RU layout of the 80 MHz band consists of the first to the 36th 26-tone RUs if only the 26-tone RUs are present, the first to the 16th 52-tone RUs if only the 52-tone RUs are present, the first to the 8th 106-tone RUs if only the 106-tone RUs are present, or the first to the fourth 242-tone RUs if only the 242-tone RUs are present. wherein the first RU includes the 5th, 14th, 23rd and 32nd 26-tone RUs and the 1st to 4th 242-tone RUs, and Among them, the first MRU includes: an MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, an MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, an MRU that aggregates the 23rd 26-tone RU and the 10th 52-tone RU, an MRU that aggregates the 32nd 26-tone RU and the 14th 52-tone RU, an MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, an MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU, an MRU that aggregates the 23rd 26-tone RU and the 5th 106-tone RU, and an MRU that aggregates the 32nd 26-tone RU and the 8th 106-tone RU.

4. The method according to claim 3, wherein: The 1st to 36th 26-tone RUs are arranged in the order starting from the 26-tone RU with a low frequency to the 26-tone RU with a high frequency. Among them, the 1st to 16th 52-tone RUs are arranged in the order starting from the 52-tone RU with a low frequency to the 52-tone RU with a high frequency. Among them, the 1st to 8th 106-tone RUs are arranged in the order starting from the 106-tone RU with a low frequency to the 106-tone RU with a high frequency, and Among them, the 1st to 4th 242-tone RUs are arranged in the order starting from the 242-tone RU with a low frequency to the 242-tone RU with a high frequency.

5. The method according to claim 1, wherein Based on the preset frequency band being the 160 MHz band, the 160 MHz band includes the first and second 80 MHz sub-channels. Among them, when the RU layout of the first 80 MHz sub-channel is only 26-tone RUs, it consists of the 1st to 36th 26-tone RUs; when it is only 52-tone RUs, it consists of the 1st to 16th 52-tone RUs; when it is only 106-tone RUs, it consists of the 1st to 8th 106-tone RUs; or when it is only 242-tone RUs, it consists of the 1st to 4th 242-tone RUs, and Among them, when the RU layout of the second 80 MHz sub-channel is only 26-tone RUs, it consists of the 37th to 72nd 26-tone RUs; when it is only 52-tone RUs, it consists of the 17th to 32nd 52-tone RUs; when it is only 106-tone RUs, it consists of the 9th to 16th 106-tone RUs; or when it is only 242-tone RUs, it consists of the 5th to 8th 242-tone RUs.

6. The method according to claim 5, wherein: The first RU includes the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26-tone RUs and the 1st to 8th 242-tone RUs, and Among them, the first MRU includes: an MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, an MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, an MRU that aggregates the 23rd 26-tone RU and the 10th 52-tone RU, an MRU that aggregates the 32nd 26-tone RU and the 14th 52-tone RU, Aggregate the MRUs of the 41st 26-tone RU and the 18th 52-tone RU, the MRUs of the 50th 26-tone RU and the 22nd 52-tone RU, the MRUs of the 59th 26-tone RU and the 26th 52-tone RU, and the MRUs of the 68th 26-tone RU and the 30th 52-tone RU, Aggregate the MRUs of the 5th 26-tone RU and the 1st 106-tone RU, the MRUs of the 14th 26-tone RU and the 4th 106-tone RU, the MRUs of the 23rd 26-tone RU and the 5th 106-tone RU, and the MRUs of the 32nd 26-tone RU and the 8th 106-tone RU, Aggregate the MRUs of the 41st 26-tone RU and the 9th 106-tone RU, the MRUs of the 50th 26-tone RU and the 12th 106-tone RU, the MRUs of the 59th 26-tone RU and the 13th 106-tone RU, and the MRUs of the 68th 26-tone RU and the 16th 106-tone RU.

7. The method according to claim 6, wherein, Arrange the 1st to 72nd 26-tone RUs in the order starting from the 26-tone RU with low frequency to the 26-tone RU with high frequency, wherein, arrange the 1st to 36th 52-tone RUs in the order starting from the 52-tone RU with low frequency to the 52-tone RU with high frequency, wherein, arrange the 1st to 16th 106-tone RUs in the order starting from the 106-tone RU with low frequency to the 106-tone RU with high frequency, and wherein, arrange the 1st to 8th 242-tone RUs in the order starting from the 242-tone RU with low frequency to the 242-tone RU with high frequency.

8. The method according to claim 1, wherein, Based on the preset frequency band being the 320 MHz band, the 320 MHz band includes the first to fourth 80 MHz sub-channels, wherein, the RU layout of the first 80 MHz sub-channel: in the case of only 26-tone RUs, it consists of the 1st to 36th 26-tone RUs; in the case of only 52-tone RUs, it consists of the 1st to 16th 52-tone RUs; in the case of only 106-tone RUs, it consists of the 1st to 8th 106-tone RUs; or in the case of only 242-tone RUs, it consists of the 1st to 4th 242-tone RUs, wherein, the RU layout of the second 80 MHz sub-channel: in the case of only 26-tone RUs, it consists of the 37th to 72nd 26-tone RUs; in the case of only 52-tone RUs, it consists of the 17th to 32nd 52-tone RUs; in the case of only 106-tone RUs, it consists of the 9th to 16th 106-tone RUs; or in the case of only 242-tone RUs, it consists of the 5th to 8th 242-tone RUs. wherein the RU layout of the third 80 MHz sub-channel consists of the 73rd to 108th 26-tone RUs if only 26-tone RUs are provided, the 33rd to 48th 52-tone RUs if only 52-tone RUs are provided, the 17th to 24th 106-tone RUs if only 106-tone RUs are provided, or the 9th to 12th 242-tone RUs if only 242-tone RUs are provided, and The layout of the fourth 80 MHz subchannel is as follows: if there are only 26-tone RUs, it is composed of the 109th to 144th 26-tone RUs; if there are only 52-tone RUs, it is composed of the 49th to 64th 52-tone RUs; if there are only 106-tone RUs, it is composed of the 25th to 32nd 106-tone RUs; if there are only 242-tone RUs, it is composed of the 13th to 16th 242-tone RUs.

9. The method according to claim 8, wherein the first RU includes the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st, and 140th 26-tone RUs and the 1st to 16th 242-tone RUs, and The first MRU includes: The MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, the MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, the MRU that aggregates the 23rd 26-tone RU and the 10th 52-tone RU, the MRU that aggregates the 32nd 26-tone RU and the 14th 52-tone RU, The MRU that aggregates the 41st 26-tone RU and the 18th 52-tone RU, the MRU that aggregates the 50th 26-tone RU and the 22nd 52-tone RU, the MRU that aggregates the 59th 26-tone RU and the 26th 52-tone RU, the MRU that aggregates the 68th 26-tone RU and the 30th 52-tone RU, the MRU that aggregates the 77th 26-tone RU and the 34th 52-tone RU, the MRU that aggregates the 86th 26-tone RU and the 38th 52-tone RU, the MRU that aggregates the 95th 26-tone RU and the 42nd 52-tone RU, the MRU that aggregates the 104th 26-tone RU and the 46th 52-tone RU, The MRU that aggregates the 113th 26-tone RU and the 50th 52-tone RU, the MRU that aggregates the 122nd 26-tone RU and the 54th 52-tone RU, the MRU that aggregates the 131st 26-tone RU and the 58th 52-tone RU, the MRU that aggregates the 140th 26-tone RU and the 62nd 52-tone RU, the MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, the MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU, the MRU that aggregates the 23rd 26-tone RU and the 5th 106-tone RU, and the MRU that aggregates the 32nd 26-tone RU and the 8th 106-tone RU, Aggregate the MRUs of the 41st 26-tone RU and the 9th 106-tone RU, aggregate the MRUs of the 50th 26-tone RU and the 12th 106-tone RU, aggregate the MRUs of the 59th 26-tone RU and the 13th 106-tone RU, and aggregate the MRUs of the 68th 26-tone RU and the 16th 106-tone RU, Aggregate the MRUs of the 77th 26-tone RU and the 17th 106-tone RU, aggregate the MRUs of the 86th 26-tone RU and the 20th 106-tone RU, aggregate the MRUs of the 95th 26-tone RU and the 21st 106-tone RU, aggregate the MRUs of the 104th 26-tone RU and the 24th 106-tone RU, Aggregate the MRUs of the 113th 26-tone RU and the 25th 106-tone RU, aggregate the MRUs of the 122nd 26-tone RU and the 28th 106-tone RU, aggregate the MRUs of the 131st 26-tone RU and the 29th 106-tone RU, and aggregate the MRUs of the 140th 26-tone RU and the 32nd 106-tone RU.

10. The method according to claim 9, wherein, Arrange the 1st to 144th 26-tone RUs in order starting from the 26-tone RU with low frequency to the 26-tone RU with high frequency, wherein, arrange the 1st to 64th 52-tone RUs in order starting from the 52-tone RU with low frequency to the 52-tone RU with high frequency, wherein, arrange the 1st to 32nd 106-tone RUs in order starting from the 106-tone RU with low frequency to the 106-tone RU with high frequency, and wherein, arrange the 1st to 16th 242-tone RUs in order starting from the 242-tone RU with low frequency to the 242-tone RU with high frequency.

11. The method according to claim 1, wherein When the PPDU is a downlink (DL) orthogonal frequency division multiple access (OFDMA) PPDU, the PPDU is an extremely high throughput (EHT) multi-user (MU) PPDU, and the receiving STA decodes the EHT MU PPDU through resources among the preset frequency bands except for the first RU and the first MRU, and wherein, when the PPDU is an uplink (UL) OFDMA PPDU, the PPDU is a trigger-based (TB) PPDU, and the transmitting STA transmits the EHT TB PPDU through resources among the preset frequency bands except for the first RU and the first MRU, and wherein, the transmitting STA is a STA that operates only in the 20 MHz band.

12. A receiving station (STA) in a wireless local area network (WLAN) system, the receiving STA includes: A memory; A transceiver; And A processor, the processor is operably connected to the memory and the transceiver, wherein, the processor is configured to: Receive a physical protocol data unit (PPDU) from a transmitting STA through a preset frequency band; and Decode the PPDU, wherein, the receiving STA is a STA that operates only in the 20 MHz band, Among them, the PPDU includes a preamble and a data field, Among them, the data field is received through resources in the preset frequency band other than the first resource unit (RU) and the first multiple RUs (MRUs), Among them, based on the preset frequency band being a 40 MHz band, the RU layout of the 40 MHz band: in the case of only 26-tone RUs, it consists of the 1st to 18th 26-tone RUs; in the case of only 52-tone RUs, it consists of the 1st to 8th 52-tone RUs; in the case of only 106-tone RUs, it consists of the 1st to 4th 106-tone RUs; or in the case of only 242-tone RUs, it consists of the 1st and 2nd 242-tone RUs, Among them, the first RU includes the 5th and 14th 26-tone RUs, Among them, the first MRU is defined as a multiple RU having 2 RUs aggregated in the RU layout, and Among them, the first MRU includes: an MRU aggregating the 5th 26-tone RU and the 2nd 52-tone RU, an MRU aggregating the 14th 26-tone RU and the 6th 52-tone RU, an MRU aggregating the 5th 26-tone RU and the 1st 106-tone RU, an MRU aggregating the 5th 26-tone RU and the 2nd 106-tone RU, an MRU aggregating the 14th 26-tone RU and the 3rd 106-tone RU, and an MRU aggregating the 14th 26-tone RU and the 4th 106-tone RU.

13. A method in a wireless local area network (WLAN) system, the method including: generating, by a sending station (STA), a physical protocol data unit (PPDU); and sending, by the sending STA, the PPDU to a receiving STA through a preset frequency band, wherein the receiving STA is an STA operating only in a 20 MHz band, wherein the PPDU includes a preamble and a data field, wherein the data field is received through resources in the preset frequency band other than the first resource unit (RU) and the first multiple RUs (MRUs), wherein based on the preset frequency band being a 40 MHz band, the RU layout of the 40 MHz band: in the case of only 26-tone RUs, it consists of the 1st to 18th 26-tone RUs; in the case of only 52-tone RUs, it consists of the 1st to 8th 52-tone RUs; in the case of only 106-tone RUs, it consists of the 1st to 4th 106-tone RUs; or in the case of only 242-tone RUs, it consists of the 1st and 2nd 242-tone RUs, wherein the first RU includes the 5th and 14th 26-tone RUs, wherein the first MRU is defined as a multiple RU having 2 RUs aggregated in the RU layout, and Among them, the first MRU includes: the MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, the MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, the MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, the MRU that aggregates the 5th 26-tone RU and the 2nd 106-tone RU, the MRU that aggregates the 14th 26-tone RU and the 3rd 106-tone RU, and the MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU.

14. The method according to claim 13, wherein Arrange the 1st to 18th 26-tone RUs in the order starting from the 26-tone RU with a low frequency to the 26-tone RU with a high frequency. Among them, arrange the 1st to 8th 52-tone RUs in the order starting from the 52-tone RU with a low frequency to the 52-tone RU with a high frequency. Among them, arrange the 1st to 4th 106-tone RUs in the order starting from the 106-tone RU with a low frequency to the 106-tone RU with a high frequency.

15. The method according to claim 13, wherein, Based on the preset frequency band being the 80 MHz band, the RU layout of the 80 MHz band, in the case of only 26-tone RUs, consists of the 1st to 36th 26-tone RUs, in the case of only 52-tone RUs, consists of the 1st to 16th 52-tone RUs, in the case of only 106-tone RUs, consists of the 1st to 8th 106-tone RUs, or in the case of only 242-tone RUs, consists of the 1st to 4th 242-tone RUs. Among them, the first RU includes the 5th, 14th, 23rd, and 32nd 26-tone RUs and the 1st to 4th 242-tone RUs, and Among them, the first MRU includes: the MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, the MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, the MRU that aggregates the 23rd 26-tone RU and the 10th 52-tone RU, the MRU that aggregates the 32nd 26-tone RU and the 14th 52-tone RU, the MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, the MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU, the MRU that aggregates the 23rd 26-tone RU and the 5th 106-tone RU, and the MRU that aggregates the 32nd 26-tone RU and the 8th 106-tone RU.

16. The method according to claim 15, wherein, Arrange the 1st to 36th 26-tone RUs in the order starting from the 26-tone RU with a low frequency to the 26-tone RU with a high frequency. Among them, arrange the 1st to 16th 52-tone RUs in the order starting from the 52-tone RU with a low frequency to the 52-tone RU with a high frequency. Among them, arrange the 1st to 8th 106-tone RUs in the order starting from the 106-tone RU with a low frequency to the 106-tone RU with a high frequency, and Among them, arrange the 1st to 4th 242-tone RUs in the order starting from the 242-tone RU with a low frequency to the 242-tone RU with a high frequency.

17. The method according to claim 13, wherein: Based on the preset frequency band being the 160 MHz band, the 160 MHz band includes first and second 80 MHz sub-channels, wherein, for the RU layout of the first 80 MHz sub-channel: in the case of only 26-tone RUs, it consists of the 1st to 36th 26-tone RUs; in the case of only 52-tone RUs, it consists of the 1st to 16th 52-tone RUs; in the case of only 106-tone RUs, it consists of the 1st to 8th 106-tone RUs; or in the case of only 242-tone RUs, it consists of the 1st to 4th 242-tone RUs, wherein, for the RU layout of the second 80 MHz sub-channel: in the case of only 26-tone RUs, it consists of the 37th to 72nd 26-tone RUs; in the case of only 52-tone RUs, it consists of the 17th to 32nd 52-tone RUs; in the case of only 106-tone RUs, it consists of the 9th to 16th 106-tone RUs; or in the case of only 242-tone RUs, it consists of the 5th to 8th 242-tone RUs, wherein, the first RU includes the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26-tone RUs and the 1st to 8th 242-tone RUs, and wherein, the first MRU includes: MRUs that aggregate the 5th 26-tone RU and the 2nd 52-tone RU, the 14th 26-tone RU and the 6th 52-tone RU, the 23rd 26-tone RU and the 10th 52-tone RU, the 32nd 26-tone RU and the 14th 52-tone RU, MRUs that aggregate the 41st 26-tone RU and the 18th 52-tone RU, the 50th 26-tone RU and the 22nd 52-tone RU, the 59th 26-tone RU and the 26th 52-tone RU, the 68th 26-tone RU and the 30th 52-tone RU, MRUs that aggregate the 5th 26-tone RU and the 1st 106-tone RU, the 14th 26-tone RU and the 4th 106-tone RU, the 23rd 26-tone RU and the 5th 106-tone RU, and the 32nd 26-tone RU and the 8th 106-tone RU, MRUs that aggregate the 41st 26-tone RU and the 9th 106-tone RU, the 50th 26-tone RU and the 12th 106-tone RU, the 59th 26-tone RU and the 13th 106-tone RU, and the 68th 26-tone RU and the 16th 106-tone RU.

18. A transmitting station (STA) in a wireless local area network (WLAN) system, the transmitting STA includes: a memory; a transceiver; and a processor operably connected to the memory and the transceiver, wherein, the processor is configured to: generate a physical protocol data unit (PPDU); and transmit the PPDU to a receiving STA via a preset frequency band, wherein, the receiving STA is a STA that operates only in the 20 MHz band wherein, the PPDU includes a preamble and a data field wherein, the data field is received through resources among the preset frequency bands other than the first resource unit (RU) and the first multiple RUs (MRUs) wherein, based on the preset frequency band being a 40 MHz band, the RU layout of the 40 MHz band: in the case of only 26-tone RUs, consists of the 1st to 18th 26-tone RUs; in the case of only 52-tone RUs, consists of the 1st to 8th 52-tone RUs; in the case of only 106-tone RUs, consists of the 1st to 4th 106-tone RUs; or in the case of only 242-tone RUs, consists of the 1st and 2nd 242-tone RUs wherein, the first RU includes the 5th and 14th 26-tone RUs wherein, the first MRU is defined as a multiple of RUs having 2 RUs aggregated in the RU layout, and wherein, the first MRU includes: an MRU aggregating the 5th 26-tone RU and the 2nd 52-tone RU, an MRU aggregating the 14th 26-tone RU and the 6th 52-tone RU, an MRU aggregating the 5th 26-tone RU and the 1st 106-tone RU, an MRU aggregating the 5th 26-tone RU and the 2nd 106-tone RU, an MRU aggregating the 14th 26-tone RU and the 3rd 106-tone RU, and an MRU aggregating the 14th 26-tone RU and the 4th 106-tone RU 19. A computer-readable medium, the computer-readable medium including instructions that are executed by at least one processor and perform a method including the following steps receiving a physical protocol data unit (PPDU) from a transmitting station (STA) through a preset frequency band; and decoding the PPDU Among them, the receiving STA is a STA that operates only in the 20 MHz band wherein, the PPDU includes a preamble and a data field wherein, the data field is received through resources among the preset frequency bands other than the first resource unit (RU) and the first multiple RUs (MRUs) wherein, based on the preset frequency band being a 40 MHz band, the RU layout of the 40 MHz band, in the case of only 26-tone RUs, consists of the 1st to 18th 26-tone RUs; in the case of only 52-tone RUs, consists of the 1st to 8th 52-tone RUs; in the case of only 106-tone RUs, consists of the 1st to 4th 106-tone RUs; or in the case of only 242-tone RUs, consists of the 1st and 2nd 242-tone RUs wherein, the first RU includes the 5th and 14th 26-tone RUs wherein, the first MRU is defined as a multiple of RUs having 2 RUs aggregated in the RU layout, and Among them, the first MRU includes: an MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, an MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, an MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, an MRU that aggregates the 5th 26-tone RU and the 2nd 106-tone RU, an MRU that aggregates the 14th 26-tone RU and the 3rd 106-tone RU, and an MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU.

20. A device in a wireless local area network (WLAN) system, the device comprising: a memory; and a processor operably connected to the memory, wherein the processor is configured to: receive a physical protocol data unit (PPDU) from a sending station (STA) through a preset frequency band; and decode the PPDU, wherein the receiving STA is an STA that operates only in the 20 MHz band, wherein the PPDU includes a preamble and a data field, wherein the data field is received through resources among the preset frequency bands except for the first resource unit (RU) and the first multiple RUs (MRUs), wherein based on the preset frequency band being a 40 MHz band, when the RUs of the 40 MHz band are only 26-tone RUs, it consists of the 1st to the 18th 26-tone RUs, when they are only 52-tone RUs, it consists of the 1st to the 8th 52-tone RUs, when they are only 106-tone RUs, it consists of the 1st to the 4th 106-tone RUs, or when they are only 242-tone RUs, it consists of the 1st and the 2nd 242-tone RUs, wherein the first RU includes the 5th and 14th 26-tone RUs, wherein the first MRU is defined as a multiple of RUs having 2 aggregated RUs in the RU layout, and wherein the first MRU includes: an MRU that aggregates the 5th 26-tone RU and the 2nd 52-tone RU, an MRU that aggregates the 14th 26-tone RU and the 6th 52-tone RU, an MRU that aggregates the 5th 26-tone RU and the 1st 106-tone RU, an MRU that aggregates the 5th 26-tone RU and the 2nd 106-tone RU, an MRU that aggregates the 14th 26-tone RU and the 3rd 106-tone RU, and an MRU that aggregates the 14th 26-tone RU and the 4th 106-tone RU.

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