Method and apparatus for transmitting or receiving distributed resource unit tone plan-based data in a wireless LAN system

Abstract

A method and apparatus for transmitting or receiving based on a distributed resource unit tone plan in a wireless LAN system is disclosed. In one embodiment of the present disclosure, a method performed by a first station (STA) in a wireless local area network (WLAN) system may include the steps of: generating a physical layer protocol data unit (PPDU) including one or more fields, wherein the one or more fields are mapped onto one or more distributed resource units (DRUs); and transmitting the PPDU to one or more second STAs on the remaining 60 MHz channels, excluding the one 20 MHz channel, based on the application of preamble puncturing to any one of four 20 MHz channels of a bandwidth including an 80 MHz channel. Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, and the nth (n=1,2,...,27) 26-tone DRU may be defined as every 27th subcarrier, which includes the nth lowest subcarrier among the available subcarriers in the 60MHz channel.

Description

Technical Field

[0001] The present disclosure relates to a transmission or reception method and apparatus based on a distributed resource unit tone plan in a wireless local area network (WLAN) system.

Background Art

[0002] New technologies for improving the transmission rate, increasing the bandwidth, improving the reliability, reducing errors, reducing latency, etc. have been introduced for wireless local area network (WLAN). Among the wireless LAN technologies, the IEEE (Institute of Electrical and Electronics Engineers) 802.11 series of standards can be referred to as Wi-Fi. For example, technologies recently introduced into wireless LANs include enhancements for Very High-Throughput (VHT) of the 802.11ac standard, enhancements for High Efficiency (HE) of the IEEE 802.11ax standard, etc.

[0003] In order to provide a more improved wireless communication environment, improvement technologies for Extremely High Throughput (EHT) are being discussed. For example, technologies for increased bandwidth, efficient utilization of multiple bands, Multiple Input Multiple Output (MIMO) to support increased spatial streams, and technologies for multi-access point (AP) coordination are being studied. In particular, various technologies for supporting traffic with low latency or real-time characteristics are being studied. In addition, new technologies for supporting ultra-high reliability (UHR), including improvements or extensions of EHT technology, are being discussed.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technical problem addressed in this disclosure is to provide a transmission or reception method and apparatus based on a distributed resource unit tone plan in a wireless LAN system.

[0005] The technical challenges addressed in this disclosure are not limited to those mentioned above, and other technical challenges not mentioned will be clearly understood by those with ordinary skill in the art to which this disclosure pertains from the following description. [Means for solving the problem]

[0006] A method performed by a first station (STA) in a wireless local area network (WLAN) system according to one aspect of the present disclosure may include the steps of: generating a physical layer protocol data unit (PPDU) having one or more fields, wherein the one or more fields are mapped onto one or more distributed resource units (DRUs); and transmitting the PPDU to one or more second STAs on the remaining 60 MHz channels, excluding the one 20 MHz channel, based on the application of preamble puncturing to one of four 20 MHz channels in a bandwidth including an 80 MHz channel. Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, and the nth (n=1,2,...,27) 26-tone DRU may be defined as every 27th subcarrier, which includes the nth lowest subcarrier among the available subcarriers in the 60MHz channel.

[0007] A method performed by a second station (STA) in a wireless local area network (WLAN) system according to a further aspect of the present disclosure may include the steps of: receiving a physical layer protocol data unit (PPDU) containing one or more fields on the remaining 60 MHz channels, excluding the one 20 MHz channel, based on the application of preamble puncturing to one of four 20 MHz channels in a bandwidth including an 80 MHz channel; and decoding the one or more fields mapped onto one or more distributed resource units (DRUs). Based on the one or more DRUs including 26-tone DRUs, the 26-tone DRU is one of 27 predefined 26-tone DRUs, and the nth (n=1,2,...,27) 26-tone DRU may be defined as every 27th subcarrier, including the nth lowest subcarrier among the available subcarriers in the 60 MHz channel. [Effects of the Invention]

[0008] According to this disclosure, a transmission or reception method and apparatus based on a distributed resource unit tone plan in a wireless LAN system can be provided.

[0009] The effects derived from this disclosure are not limited to those mentioned above, and any other effects not mentioned above will be clearly understood by a person with ordinary skill in the art to which this disclosure pertains from the following description. [Brief explanation of the drawing]

[0010] The accompanying drawings, included as part of the detailed description to aid in understanding this disclosure, provide examples of the disclosure and illustrate the technical features of the disclosure together with the detailed description.

[0011] [Figure 1]This is a block diagram illustrating an example of a wireless communication device according to one embodiment of the present disclosure. [Figure 2] This figure shows an exemplary structure of a wireless LAN system to which this disclosure can be applied. [Figure 3] This diagram illustrates the link setup process to which this disclosure applies. [Figure 4] This diagram illustrates the backoff process to which this disclosure applies. [Figure 5] This diagram illustrates the CSMA / CA baseframe transmission operation to which this disclosure can be applied. [Figure 6] This figure illustrates an example of a frame structure used in a wireless LAN system to which this disclosure can be applied. [Figure 7] This figure shows an example of a PPDU as defined in the IEEE 802.11 standard to which this disclosure applies. [Figure 8-10] This figure illustrates an example of a resource unit in a wireless LAN system to which this disclosure can be applied. [Figure 11] This is a diagram illustrating examples of DRUs to which this disclosure applies. [Figure 12] This figure shows an exemplary format of a trigger frame to which this disclosure can be applied. [Figure 13] This figure illustrates an example of a DRU tone plan-based PPDU receiving method that supports preamble puncturing of the first STA related to this disclosure. [Figure 14] This figure illustrates an example of a DRU tone plan-based PPDU transmission method that supports preamble puncturing of the second STA related to this disclosure. [Modes for carrying out the invention]

[0012] Preferred embodiments relating to this disclosure will be described in detail below with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to illustrate exemplary embodiments of this disclosure and is not intended to represent the only possible embodiments of this disclosure. The detailed description below includes specific details to provide a complete understanding of this disclosure. However, those skilled in the art will understand that this disclosure is implementable without such specific details.

[0013] In some cases, to avoid ambiguity of the concepts in this disclosure, known structures and devices may be omitted, or they may be shown in the form of block diagrams focusing on the core function of each structure and device.

[0014] In this disclosure, when one component is “connected,” “joined,” or “linked” to another component, this may include not only direct connections but also indirect connections between them where other components exist. Also, in this disclosure, the terms “includes” or “have” identify the presence of the referred features, stages, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, stages, operations, elements, components and / or groups thereof.

[0015] In this disclosure, terms such as "first," "second," etc., are used solely to distinguish one component from another, and are not used to limit the components, nor do they limit the order or importance of the components unless specifically mentioned. Therefore, within the scope of this disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment may be referred to as a first component in another embodiment.

[0016] The terms used in this disclosure are for the purpose of describing specific embodiments and are not intended to limit the scope of the claims. As used in the description of the embodiments and the appended claims, the singular forms are also intended to include the plural forms unless the context clearly dictates otherwise. The term "and / or" used in this disclosure may refer to one of the related listed items or may include any and all possible combinations of two or more of them. Also, in this disclosure, " / " between words has the same meaning as "and / or" unless otherwise specified.

[0017] The examples of this disclosure may be applied to various wireless communication systems. For example, the examples of this disclosure may be applied to a wireless LAN system. For example, the examples of this disclosure may be applied to an IEEE 802.11a / g / n / ac / ax / be standard-based wireless LAN. Note that the examples of this disclosure may be applied to a newly proposed IEEE 802.11bn (or, UHR) standard-based wireless LAN. Furthermore, the examples of this disclosure may also be applied to a next-generation standard-based wireless LAN after IEEE 802.11bn. Also, the examples of this disclosure may be applied to a cellular wireless communication system. For example, it may be applied to a cellular wireless communication system based on the technologies of the LTE (Long Term Evolution) series of the 3GPP (3rd Generation Partnership Project: registered trademark: the same hereinafter) standard and the technologies of the 5G NR (New Radio) series.

[0018] Hereinafter, the technical features to which the examples of this disclosure can be applied will be described.

[0019] FIG. 1 is a block configuration diagram illustrating a wireless communication device according to an embodiment of this disclosure.

[0020] The first device 100 and the second device 200 illustrated in Figure 1 may be replaced with various terms such as terminal, wireless device, WTRU (Wireless Transmit Receive Unit), UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), MSS (Mobile Subscriber Unit), SS (Subscriber Station), AMS (Advanced Mobile Station), WT (Wireless terminal), or simply user. Furthermore, the first device 100 and the second device 200 may be replaced with various terms such as access point (AP), BS (Base Station), fixed station, Node B, BTS (base transceiver system), network, AI (Artificial Intelligence) system, RSU (roadside unit), repeater, router, relay, gateway, etc.

[0021] The devices 100 and 200 illustrated in Figure 1 can also be referred to as stations (STA). For example, the devices 100 and 200 illustrated in Figure 1 can be referred to by various terms such as transmitting device, receiving device, transmitting STA, and receiving STA. For example, STA 110 and 200 can play the role of an AP (access point) or a non-AP. That is, in this disclosure, STA 110 and 200 may have AP and / or non-AP functions. When STA 110 and 200 have AP functions, they can simply be called APs, and when STA 110 and 200 have non-AP functions, they can simply be called STAs. In addition, in this disclosure, AP may be represented as AP STA.

[0022] Referring to Figure 1, the first device 100 and the second device 200 can send and receive wireless signals using various wireless LAN technologies (e.g., the IEEE 802.11 series). The first device 100 and the second device 200 may include interfaces to the medium access control (MAC) layer and the physical layer (PHY) in accordance with the IEEE 802.11 standard.

[0023] Furthermore, the first device 100 and the second device 200 can also further support various communication standards other than Wi-Fi technology (e.g., 3GPP LTE series, 5G NR series standards, etc.). The devices of this disclosure may also be embodied in various devices such as mobile phones, vehicles, personal computers, Augmented Reality (AR) equipment, and Virtual Reality (VR) equipment. In addition, the STA of this specification can support various communication services such as voice calls, video calls, data communication, autonomous driving, Machine-Type Communication (MTC), Machine-to-Machine (M2M), Device-to-Device (D2D), and Internet of Things (IoT).

[0024] The first device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memories 104 and / or the transceivers 106 and be configured to embody the descriptions, functions, procedures, suggestions, methods and / or operation diagrams of this disclosure. For example, the processor 102 may process information in the memory 104 to generate first information / signals and then transmit a radio signal containing the first information / signals via the transceiver 106. Alternatively, the processor 102 may receive a radio signal containing second information / signals via the transceiver 106 and then store information obtained from signal processing of the second information / signals in the memory 104. The memory 104 may be linked to the processor 102 and can store various information relating to the operation of the processor 102. For example, memory 104 may store software code that executes some or all of a process controlled by processor 102, or that contains instructions for executing the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams in this disclosure. Here, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to embody wireless LAN technology (e.g., IEEE 802.11 series). Transceiver 106 may be coupled with processor 102 and can transmit and / or receive radio signals via one or more antennas 108. Transceiver 106 may include a transmitter and / or receiver. Transceiver 106 may be used synonymously with RF (Radio Frequency) unit. In this disclosure, device may also mean communication modem / circuit / chip.

[0025] The second device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memories 204 and / or the transceivers 206 and be configured to embody the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed herein. For example, the processor 202 may process information in the memory 204 to generate third information / signals and then transmit a radio signal containing the third information / signals via the transceiver 206. Alternatively, the processor 202 may receive a radio signal containing fourth information / signals via the transceiver 206 and then store information obtained from signal processing of the fourth information / signals in the memory 204. The memory 204 may be linked to the processor 202 and can store various information related to the operation of the processor 202. For example, memory 204 may store software code that executes some or all of the processes controlled by processor 202, or that contains instructions for executing the descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed in this disclosure. Here, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to embody wireless LAN technology (e.g., IEEE 802.11 series). Transceiver 206 may be coupled with processor 202 and may transmit and / or receive radio signals via one or more antennas 208. Transceiver 206 may include a transmitter and / or receiver. Transceiver 206 may be used synonymously with RF unit. In this disclosure, device may also mean communication modem / circuit / chip.

[0026] The hardware elements of devices 100,200 are described in more detail below. However, one or more protocol layers may be embodied by one or more processors 102,202. For example, one or more processors 102,202 can embodied one or more layers (e.g., functional layers such as PHY and MAC). One or more processors 102,202 can generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) by means of the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams in this disclosure. One or more processors 102,202 can generate messages, control information, data, or information by means of the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams in this disclosure. One or more processors 102,202 can generate signals (e.g., baseband signals) containing PDUs, SDUs, messages, control information, data, or information by the functions, procedures, proposals and / or methods of this disclosure and provide them to one or more transceivers 106,206. One or more processors 102,202 can receive signals (e.g., baseband signals) from one or more transceivers 106,206 and obtain PDUs, SDUs, messages, control information, data, or information by the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams of this disclosure.

[0027] One or more processors 102,202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102,202 may be embodied by hardware, firmware, software, or a combination thereof. For example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) may be included in one or more processors 102,202. The descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams disclosed in this disclosure may be embodied using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and / or sequence diagrams disclosed in this disclosure may be contained in one or more processors 102,202 or stored in one or more memories 104,204 and driven by one or more processors 102,202. The descriptions, functions, procedures, suggestions, methods and / or sequence diagrams disclosed in this disclosure may be embodied by firmware or software in the form of code, instructions and / or sets of instructions.

[0028] One or more memories 104,204 may be connected to one or more processors 102,202 and can store various forms of data, signals, messages, information, programs, code, instructions and / or commands. One or more memories 104,204 may consist of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media and / or combinations thereof. One or more memories 104,204 may be located inside and / or outside of one or more processors 102,202. Furthermore, one or more memories 104,204 may be connected to one or more processors 102,202 by various technologies such as wired or wireless connections.

[0029] One or more transceivers 106,206 can transmit user data, control information, radio signals / channels, etc., as referred to in the methods and / or operation sequence diagrams of this disclosure, to one or more other devices. One or more transceivers 106,206 can receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams disclosed in this disclosure, from one or more other devices. For example, one or more transceivers 106,206 may be coupled with one or more processors 102,202 to transmit and receive radio signals. For example, one or more processors 102,202 can control one or more transceivers 106,206 to transmit user data, control information, or radio signals to one or more other devices. Also, one or more processors 102,202 can control one or more transceivers 106,206 to receive user data, control information, or radio signals from one or more other devices. Furthermore, one or more transceivers 106,206 may be connected to one or more antennas 108,208, and one or more transceivers 106,206 may be configured to send and receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, proposals, methods and / or operation sequence diagrams disclosed in this disclosure, via one or more antennas 108,208. In this disclosure, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106,206 may convert the received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing using one or more processors 102,202. One or more transceivers 106,206 may convert the user data, control information, radio signals / channels, etc., processed by one or more processors 102,202, from baseband signals to RF band signals. To this end, one or more transceivers 106,206 may include (analog) oscillators and / or filters.

[0030] For example, either STA100 or STA200 can perform the intended operation of an AP, and the other STA100 or STA200 can perform the intended operation of a non-AP STA. For example, the transceivers 106 and 206 in Figure 1 can perform the transmission and reception of signals (e.g., packets or PPDUs (Physical Layer Protocol Data Units) conforming to IEEE 802.11a / b / g / n / ac / ax / be / bn, etc.). Furthermore, in this disclosure, the operation of various STAs generating transmission and reception signals or performing data processing and calculations in advance for transmission and reception signals may be performed by the processors 102 and 202 in Figure 1. For example, an example of an operation that generates transmit / receive signals or performs data processing or calculations in advance for transmit / receive signals may include: 1) an operation to determine / acquire / construct / calculate / decode / encode bit information of fields contained within the PPDU (SIG (signal), STF (short training field), LTF (long training field), Data, etc.); 2) an operation to determine / construct / acquire time resources and frequency resources (e.g., subcarrier resources) used for fields contained within the PPDU (SIG, STF, LTF, Data, etc.); 3) an operation to determine / construct / acquire specific sequences (e.g., pilot sequence, STF / LTF sequence, extra sequence applied to SIG) used for fields contained within the PPDU (SIG, STF, LTF, Data, etc.); 4) power control operations and / or power saving operations applied to the STA; and 5) operations related to determining / acquiring / constructing / calculating / decoding / encoding the ACK signal. Furthermore, in the following example, various pieces of information used by various STAs for determining / acquiring / composing / calculating / decoding / encoding the transmit / receive signals (e.g., information about fields / subfields / control fields / parameters / power, etc.) may be stored in memories 104,204 of Figure 1.

[0031] In the following, downlink (DL) refers to the link for communication from AP STA to non-AP STA, and downlink PPDU / packets / signals, etc., may be transmitted and received through the downlink. In downlink communication, the transmitter may be part of AP STA, and the receiver may be part of non-AP STA. Uplink (UL) refers to the link for communication from non-AP STA to AP STA, and uplink PPDU / packets / signals, etc., may be transmitted and received through the uplink. In uplink communication, the transmitter may be part of non-AP STA, and the receiver may be part of AP STA.

[0032] Figure 2 shows an exemplary structure of a wireless LAN system to which this disclosure can be applied.

[0033] The structure of a wireless LAN system may consist of multiple components. A wireless LAN may be provided that supports transparent STA mobility to higher layers through the interaction of multiple components. A BSS (Basic Service Set) corresponds to the basic structural block of a wireless LAN. Figure 2 illustrates the existence of two BSSs (BSS1 and BSS2), with each BSS containing two STAs as members (STA1 and STA2 are included in BSS1, and STA3 and STA4 are included in BSS2). In Figure 2, the ellipses representing the BSSs may be understood as representing the coverage area where the STAs included in that BSS maintain communication. This area can be called a BSA (Basic Service Area). When an STA moves outside a BSA, it can no longer communicate directly with other STAs within that BSA.

[0034] Ignoring the DS shown in Figure 2, the most basic type of BSS in a wireless LAN is the Independent BSS (IBSS). For example, an IBSS can have a minimal form consisting of only two STAs. For instance, assuming other components are omitted, BSS1 consisting only of STA1 and STA2, or BSS2 consisting only of STA3 and STA4, could be considered typical examples of an IBSS. Such a configuration is possible when STAs can communicate directly without APs. Furthermore, this type of wireless LAN is not pre-planned and configured, but can be configured when the LAN requires it, and can be called an ad-hoc network. Since an IBSS does not include APs, there is no centralized management entity. That is, in an IBSS, STAs are managed in a distributed manner. In an IBSS, all STAs may be mobile STAs, and connection to a distributed system (DS) is not permitted, forming a self-contained network.

[0035] STA may appear and disappear, and STA may enter and leave the BSS region. Membership of an STA in a BSS may change dynamically due to actions such as leaving or rejoining. To become a member of a BSS, an STA can join the BSS using a synchronization process. To access all services of the BSS-based structure, an STA must be associated with the BSS. Such associations may be configured dynamically and may include the use of Distribution System Services (DSS).

[0036] In a wireless LAN, the direct STA-to-STA distance may be limited by PHY performance. While this distance limit may be sufficient in some cases, there may be situations requiring communication between STAs over longer distances. Distributed systems (DS) may be configured to support extended coverage.

[0037] DS refers to a structure in which BSSs are interconnected. Specifically, as shown in Figure 2, BSSs may exist as components of an extended form of a network composed of multiple BSSs. DS is a logical concept and may be identified by the characteristics of the Distributed System Medium (DSM). In this regard, Wireless Medium (WM) and DSM may be logically distinct. Each logical medium is used for a different purpose and by different components. These mediums are neither limited to being the same nor limited to being different. The flexibility of wireless LAN structures (DS structures or other network structures) can be explained by the fact that multiple mediums are logically distinct from one another. That is, wireless LAN structures can be embodied in various ways, and each embodied example may be identified independently by its physical characteristics.

[0038] DS can support mobile devices by providing seamless integration of multiple BSSs and offering the necessary logical services for handling destination addresses. DS may also include a portal component that acts as a bridge for connecting wireless LANs with other networks (e.g., IEEE 802.X).

[0039] An AP (Application Programming Object) is an entity that enables a coupled non-AP STA (Systematization System) to access the DS (Data Storage System) via the WM (Web Module) and also possesses the functionality of an STA. Data can be moved between the BSS (Base System Storage) and the DS via the AP. For example, STA2 and STA3, shown in Figure 2, possess the functionality of an STA while also providing the ability for coupled non-AP STAs (STA1 and STA4) to access the DS. Furthermore, since all APs are essentially STAs, all APs are addressable entities. The address used by the AP for communication on the WM and the address used by the AP for communication on the DSM (Data Storage System) do not necessarily have to be the same. A BSS consisting of an AP and one or more STAs can be called an infrastructure BSS.

[0040] Data transmitted from one of the STAs connected to an AP to the AP's STA address is always received on an uncontrolled port and may be processed by an IEEE 802.1X port access entity. Alternatively, once a controlled port is authenticated, the transmitted data (or frame) may be forwarded to a DS.

[0041] An Extended Service Set (ESS) may be added to the aforementioned DS structure to provide even broader coverage.

[0042] An ESS (Service Set Network) refers to a network of arbitrary size and complexity composed of DSs (Distributed Service Sets) and BSSs (Blockchain Service Sets). An ESS can be a collection of BSSs connected to a single DS. However, an ESS cannot contain a DS. A key feature of an ESS network is that it appears as an IBSS (Internet Link Control Service Set) at the LLC (Logical Link Control) layer. STAs (Stage Attacks) within an ESS can communicate with each other, and mobile STAs can move transparently to the LLC from one BSS to another (within the same ESS). APs (Access Points) within an ESS may have the same SSID (Service Set Identification). An SSID is distinct from a BSSID, which is the identifier for a BSS.

[0043] In wireless LAN systems, no assumptions are made regarding the relative physical location of BSSs, and any of the following forms are possible: BSSs may partially overlap, which is a commonly used form to provide continuous coverage. BSSs do not have to be physically connected, and logically there is no limit to the distance between BSSs. BSSs may also be located in the same physical location, which may be used to provide redundancy. One (or more) IBSS or ESS networks may physically exist in the same space as one (or more) ESS networks. This may include ESS network configurations when an ad hoc network operates in the location where an ESS network exists, when physically overlapping wireless networks are configured by different organizations, or when two or more different access and security policies are required at the same location.

[0044] Figure 3 is a diagram illustrating the link setup process to which this disclosure can be applied.

[0045] For an STA to set up a link to a network and send and receive data, it must first discover the network, perform authentication, establish an association, and carry out security authentication procedures. The link setup process can be called the session initiation process or session setup process. Alternatively, the discovery, authentication, association, and security setting processes of the link setup process can be collectively referred to as the association process.

[0046] In step S310, the STA can perform a network discovery operation. The network discovery operation may include the STA's scanning operation. That is, in order for the STA to access a network, it must find a network that it can join. Before joining a wireless network, the STA must identify a compatible network, and the process of identifying networks in a specific area is called scanning.

[0047] There are two scanning methods: active scanning and passive scanning. Figure 3 illustrates a network discovery operation that includes the active scanning process. In active scanning, the STA performing the scanning sends a probe request frame to search for nearby APs while moving between channels, and waits for a response. The responder sends a probe response frame to the STA that sent the probe request frame. Here, the responder may be the STA that last sent a beacon frame in the BSS of the channel being scanned. In BSS, APs send beacon frames, so APs become the responders, while in IBSS, STAs within IBSS alternately send beacon frames, so the responders are not constant. For example, an STA that sends a probe request frame on channel 1 and receives a probe response frame on channel 1 can save the BSS-related information contained in the received probe response frame and move to the next channel (e.g., channel 2) to perform scanning in the same way (i.e., send and receive probe requests / responses on channel 2).

[0048] Although not shown in Figure 3, scanning may also be performed using a passive scanning method. In passive scanning, the STA performing the scanning waits for beacon frames while switching channels. A beacon frame is one of the management frames defined in IEEE 802.11, and is transmitted periodically to announce the presence of a wireless network, allowing the scanning STA to find and join the wireless network. In BSS, APs are responsible for periodically transmitting beacon frames, while in IBSS, STAs within IBSS transmit beacon frames alternately. When the scanning STA receives a beacon frame, it stores the BSS information contained in the beacon frame and records the beacon frame information on each channel while moving to other channels. An STA that has received a beacon frame can store the BSS-related information contained in the received beacon frame and move to the next channel to perform scanning on the next channel in the same way. Comparing active scanning and passive scanning, active scanning has the advantage of less delay and power consumption compared to passive scanning.

[0049] After the STA discovers the network, an authentication process may be performed in step S320. This authentication process can be called the first authentication process to clearly distinguish it from the security setup operation in step S340, which will be described later.

[0050] The authentication process involves the STA sending an authentication request frame to the AP, and the AP responding by sending an authentication response frame to the STA. The authentication frame used in the authentication request / response corresponds to the management frame.

[0051] The authentication frame may include information such as the authentication algorithm number, authentication transaction sequence number, status code, challenge text, Robust Security Network (RSN), and Finite Cyclic Group. This is just an example of some of the information that may be included in the authentication request / response frame, and may be replaced by other information or may contain additional information.

[0052] The STA can send an authentication request frame to the AP. Based on the information contained in the received authentication request frame, the AP can decide whether or not to allow authentication to the STA. The AP can provide the STA with the result of the authentication process using an authentication response frame.

[0053] After the STA has been successfully authenticated, the association process may take place in step S330. The association process includes the STA sending an association request frame to the AP, and the AP sending an association response frame to the STA in response.

[0054] For example, an association request frame may include information about various capacities, such as the beacon listening interval, SSID (service set identifier), supported rates, supported channels, RSN, mobility domain, supported operating classes, TIM broadcast request (Traffic Indication Map Broadcast request), and interworking service capacity. For example, an association response frame may include information about various capacities, such as the status code, AID (Association ID), supported rates, EDCA (Enhanced Distributed Channel Access) parameter set, RCPI (Received Channel Power Indicator), RSNI (Received Signal to Noise Indicator), mobility domain, timeout interval (e.g., association comeback time), overlapping BSS scan parameters, TIM broadcast response, and QoS (Quality of Service) map. This is an example of some of the information that may be included in a join request / response frame, and may be replaced by other information or may include additional information.

[0055] After the STA is successfully connected to the network, the security setup process may be performed in step S340. The security setup process in step S340 can also be described as an authentication process using RSNA (Robust Security Network Association) request / response, and the authentication process in step S320 can be called the first authentication process, while the security setup process in step S340 can simply be called the authentication process.

[0056] The security setup process in stage S340 may include, for example, a process of private key setup using a four-way handshake with an EAPOL (Extensible Authentication Protocol over LAN) frame. Furthermore, the security setup process may be performed using a security method not defined in the IEEE 802.11 standard.

[0057] Figure 4 is a diagram illustrating the backoff process to which this disclosure can be applied.

[0058] In wireless LAN systems, the basic access mechanism of MAC (Medium Access Control) is the CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) mechanism. The CSMA / CA mechanism is also called the Distributed Coordination Function (DCF) of IEEE 802.11 MAC, and basically employs a "listen before talk" access mechanism. With this type of access mechanism, an AP and / or STA can perform a Clear Channel Assessment (CCA) to sense the radio channel or medium within a predetermined time interval (e.g., DIFS Inter-Frame Space) before initiating transmission. If the sensing determines that the medium is idle, the AP and / or STA will begin transmitting a frame through that medium. On the other hand, if the medium is perceived as occupied or busy, the AP and / or STA will not begin transmitting itself, but will wait for a delay period (e.g., a random backoff period) for medium access before attempting to transmit a frame. By applying a random backoff period, multiple STAs are expected to attempt to transmit frames after waiting for different periods of time from each other, thus minimizing collisions.

[0059] Furthermore, the IEEE 802.11 MAC protocol provides HCF (Hybrid Coordination Function). HCF is based on the aforementioned DCF and PCF (Point Coordination Function). PCF is a polling-based synchronous access method that periodically polls so that all receiving APs and / or STAs can receive data frames. HCF also has EDCA (Enhanced Distributed Channel Access) and HCCA (HCF Controlled Channel Access). EDCA is a competition-based access method for a provider to provide data frames to multiple users, while HCCA uses a non-competition-based channel access method with a polling mechanism. In addition, HCF includes a media access mechanism to improve the QoS (Quality of Service) of wireless LANs and can transmit QoS data during both the Contention Period (CP) and the Contention Free Period (CFP).

[0060] Refer to Figure 4 to explain the operation based on the random backoff period. When a medium that was occupied / busy changes to idle, multiple STAs can attempt to transmit data (or frames). As a way to minimize collisions, each STA can select a random backoff count and wait for the corresponding slot time before attempting to transmit. The random backoff count has a pseudo-random integer value and may be determined to any one of the values ​​in the range of 0 to CW, where CW is the Contention Window parameter value. The CW parameter is initially given as CWmin, but can take twice that value in case of transmission failure (e.g., if an ACK for a transmitted frame is not received). When the CW parameter value becomes CWmax, the STA can attempt to transmit data while maintaining the CWmax value until successful data transmission occurs, at which point it is reset to the CWmin value. The CW, CWmin, and CWmax values ​​are 2 n It is preferable to set it to -1 (n=0,1,2,...).

[0061] Once the random backoff process begins, the STA continues to monitor the media while counting down the backoff slots according to the determined backoff count value. When the media is monitored as occupied, the countdown stops and it waits; when the media becomes idle, the remaining countdown resumes.

[0062] In the example in Figure 4, when a packet to be transmitted reaches the MAC of STA3, STA3 can immediately transmit the frame after confirming that the medium is idle for DIFS only. The remaining STAs monitor the occupied / busy state of the medium and wait. Meanwhile, data to be transmitted may also be generated in STA1, STA2, and STA5. When each STA monitors the medium as idle, after waiting for DIFS only, it can count down the backoff slot using a random backoff count value of its choice. Assume that STA2 selects the minimum backoff count value and STA1 selects the maximum backoff count value. That is, the example illustrates a case where the remaining backoff time for STA5 is shorter than the remaining backoff time for STA1 when STA2 finishes its backoff count and begins transmitting a frame. STA1 and STA5 pause their countdown and wait for a while while STA2 occupies the medium. When STA2's occupation ends and the medium becomes idle again, STA1 and STA5 wait for DIFS only before resuming the paused backoff count. In other words, frame transmission can begin after counting down the remaining backoff slots equal to the remaining backoff time. Since STA5's remaining backoff time was shorter than STA1's, STA5 begins frame transmission. Data to transmit may also occur in STA4 while STA2 is occupying the medium. From STA4's perspective, when the medium becomes idle, it can wait for DIFS, then count down using a random backoff count value of its choosing, and begin frame transmission. The example in Figure 4 shows a case where STA5's remaining backoff time coincidentally matches STA4's random backoff count value, in which case a collision may occur between STA4 and STA5. If a collision occurs, neither STA4 nor STA5 will receive an ACK, and data transmission will fail. In this case, STA4 and STA5 can double their CW value, select a random backoff count value, and then perform the countdown.STA1 waits while the medium is occupied by transmissions from STA4 and STA5. When the medium becomes idle, STA1 waits only for DIFS, and can begin transmitting frames after the remaining backoff time has elapsed.

[0063] As illustrated in Figure 4, data frames are used to transmit data forwarded to higher layers and may be transmitted after a backoff that occurs after DIFS has elapsed, from the time the medium becomes idle. Furthermore, management frames are used to exchange management information that is not forwarded to higher layers and are transmitted after a backoff that occurs after an IFS such as DIFS or PIFS (Point Coordination Function IFS) has elapsed. Subtypes of management frames include beacons, association request / response, re-association request / response, probe request / response, and authentication request / response. Control frames are used to control access to the medium. Control frames can be subtypes of frames such as RTS (Request-To-Send), CTS (Clear-To-Send), ACK (Acknowledgment), PS-Poll (Power Save-Poll), Block ACK (BlockAck), Block ACK Request (BlockACKReq), NDP Announcement (null data packet announcement), and Trigger. Control frames are sent after a backoff that occurs after DIFS if they are not a response frame to a previous frame, and without a backoff after SIFS (short IFS) if they are a response frame to a previous frame. The type and subtype of a frame may be identified by the type field and subtype field in the frame control (FC) field.

[0064] A Quality of Service (QoS) STA can transmit a frame after an arbitration IFS (AIFS) for the access category (AC) to which the frame belongs, i.e., after a backoff that occurs after AIFS[i] (where i is a value determined by the AC). Frames for which AIFS[i] is available can be data frames, management frames, or control frames that are not response frames.

[0065] Figure 5 is a diagram illustrating the CSMA / CA baseframe transmission operation to which this disclosure can be applied.

[0066] As mentioned earlier, the CSMA / CA mechanism includes not only physical carrier sensing, where the STA directly senses the medium, but also virtual carrier sensing. Virtual carrier sensing is intended to compensate for problems that can occur in medium access, such as the hidden node problem. For virtual carrier sensing, the STA's MAC can utilize the Network Allocation Vector (NAV). The NAV is a value that indicates to other STAs the time remaining until the medium becomes available, used by an STA that is currently using or authorized to use the medium. Therefore, the value set as the NAV corresponds to the period during which the STA sending the frame is scheduled to use the medium, and STAs receiving the NAV value are prohibited from accessing the medium during that period. For example, the NAV may be set based on the value of the "duration" field in the frame's MAC header.

[0067] In the example shown in Figure 5, we assume that STA1 is attempting to transmit data to STA2, and STA3 is in a position where it can overhear some or all of the frames transmitted and received between STA1 and STA2.

[0068] In CSMA / CA baseframe transmission operation, a mechanism utilizing RTS / CTS frames may be applied to reduce the possibility of collisions between transmissions from multiple STAs. In the example in Figure 5, while STA1 is transmitting, carrier sensing by STA3 may determine that the medium is idle. That is, STA1 may be a hidden node for STA3. Alternatively, in the example in Figure 5, while STA2 is transmitting, carrier sensing by STA3 may determine that the medium is idle. That is, STA2 may be a hidden node for STA3. By exchanging RTS / CTS frames before data transmission and reception between STA1 and STA2, it is possible to prevent STAs outside the transmission range of either STA1 or STA2, or STAs outside the carrier sensing range for transmissions from STA1 or STA3, from attempting to occupy the channel during data transmission and reception between STA1 and STA2.

[0069] Specifically, STA1 can determine whether a channel is in use or not using carrier sensing. In terms of physical carrier sensing, STA1 can determine the channel's occupied or idle state based on the energy magnitude or signal correlation detected from the channel. In terms of virtual carrier sensing, STA1 can determine the channel's occupied state using a network allocation vector (NAV) timer.

[0070] STA1 can send an RTS frame to STA2 after backoff if the channel is idle during DIFS. STA2, upon receiving an RTS frame, can send a CTS frame, which is a response to the RTS frame, to STA1 after SIFS.

[0071] If STA3 cannot overhear CTS frames from STA2 but can overhear RTS frames from STA1, STA3 can use the duration information contained in the RTS frames to set the NAV timer for subsequent consecutive frame transmission periods (e.g., SIFS + CTS frame + SIFS + data frame + SIFS + ACK frame). Alternatively, if STA3 cannot overhear RTS frames from STA1 but can overhear CTS frames from STA2, STA3 can use the duration information contained in the CTS frames to set the NAV timer for subsequent consecutive frame transmission periods (e.g., SIFS + data frame + SIFS + ACK frame). In other words, STA3 can set NAV based on overhearing one or more RTS or CTS frames from at least one of STA1 or STA2. If STA3 receives a new frame before the NAV timer expires, it can update the NAV timer using the duration information contained in the new frame. STA3 will not attempt to access the channel until the NAV timer expires.

[0072] When STA1 receives a CTS frame from STA2, it can send a data frame to STA2 after SIFS from the time the CTS frame reception is complete. If STA2 successfully receives the data frame, it can send an ACK frame, which is a response to the data frame, to STA1 after SIFS. When the NAV timer expires, STA3 can use carrier sensing to determine whether the channel is in use or not. If STA3 determines that the channel is not being used by another terminal between the expiration of the NAV timer and DIFS, it can attempt to access the channel after the random backoff conflict window (CW) has passed.

[0073] Figure 6 is a diagram illustrating an example of a frame structure used in a wireless LAN system to which this disclosure can be applied.

[0074] The PHY layer can prepare the MPDU (MAC PDU) to be transmitted based on instructions or primitives (meaning a set of instructions or parameters) from the MAC layer. For example, when the PHY layer receives an instruction from the MAC layer requesting it to start transmitting, it switches to transmit mode and can assemble the information provided by the MAC layer (e.g., data) into a frame and transmit it. Also, when the PHY layer detects a valid preamble in the frame it is receiving, it monitors the preamble header and sends an instruction to the MAC layer to signal that the PHY layer has started receiving.

[0075] Thus, information transmission and reception in wireless LAN systems are performed in the form of frames, and for this purpose, the Physical Layer Protocol Data Unit (PPDU) frame format is defined.

[0076] A basic PPDU may include an STF (Short Training Field), an LTF (Long Training Field), a SIG (SIGNAL) field, and a Data field. The most basic (e.g., non-HT (High Throughput) PPDU format shown in Figure 7) may consist only of an L-STF (Legacy-STF), an L-LTF (Legacy-LTF), an L-SIG (Legacy-SIG) field, and a Data field. Depending on the type of PPDU format (e.g., HT-mixed format PPDU, HT-greenfield format PPDU, VHT (Very High Throughput) PPDU, etc.), additional (or other types of) RL-SIG, U-SIG, non-legacy SIG fields, non-legacy STF, non-legacy LTF (i.e., xx-SIG, xx-STF, xx-LTF (e.g., xx is HT, VHT, HE, EHT, etc.)) may be included between the L-SIG field and the Data field. More specific details will be discussed later, referring to Figure 7.

[0077] STF is a signal used for signal detection, AGC (Automatic Gain Control), diversity selection, and precise time synchronization, while LTF is a signal used for channel estimation and frequency error estimation. In essence, STF and LTF are signals for synchronizing the OFDM physical layer and for channel estimation.

[0078] The SIG field may contain various information related to PPDU transmission and reception. For example, the L-SIG field consists of 24 bits and may include a 4-bit Rate field, a 1-bit Reserved bit, a 12-bit Length field, a 1-bit Parity field, and a 6-bit Tail field. The RATE field may contain information about the data modulation and coding rate. For example, the 12-bit Length field may contain information about the length or time duration of the PPDU. For example, the value of the 12-bit Length field may be determined based on the type of PPDU. For example, for non-HT, HT, VHT, or EHT PPDUs, the value of the Length field may be determined to be a multiple of 3. For example, for HE PPDUs, the value of the Length field may be determined to be a multiple of 3 + 1 or a multiple of 3 + 2.

[0079] The data field may include a SERVICE field, a PSDU (Physical Layer Service Data Unit), and PPDU TAIL bits, and may also include padding bits if necessary. Some bits of the SERVICE field may be used for synchronizing the descramble at the receiving end. The PSDU corresponds to the MAC PDU defined in the MAC layer and may contain data generated / used in higher layers. The PPDU TAIL bits may be used to return the encoder to a 0 state. Padding bits may be used to adjust the length of the data field to a predetermined unit.

[0080] MAC PDUs are defined by various MAC frame formats, and a basic MAC frame consists of a MAC header, frame body, and FCS (Frame Check Sequence). MAC frames are composed of MAC PDUs and may be transmitted / received by a PSDU, which is the data portion of the PPDU format.

[0081] The MAC header includes fields such as Frame Control, Duration / ID, and Address. The Frame Control field may contain control information necessary for transmitting / receiving frames. The Duration / ID field may be set to the time required to transmit the frame. The Address subfield can indicate the frame's receiver address, transmitter address, destination address, and source address, and some Address subfields may be omitted. Sequence Control, QoS Control, and HT Control subfields are also included, and the specific contents of each subfield of the MAC header can be found in the IEEE 802.11 standard document.

[0082] The null data PPDU (NDP) format refers to a form of PPDU format that does not include data fields. In other words, NDP is a frame format that includes the PPDU preamble (i.e., L-STF, L-LTF, L-SIG fields, and if present, also non-legacy SIG, non-legacy STF, and non-legacy LTF fields) in a general PPDU format, but does not include the rest (i.e., data fields).

[0083] Figure 7 shows an example of a PPDU as defined in the IEEE 802.11 standard to which this disclosure applies.

[0084] Standards such as IEEE 802.11a / g / n / ac / ax use various forms of PPDU. The basic PPDU format (IEEE 802.11a / g) includes L-LTF, L-STF, L-SIG, and Data fields. The basic PPDU format can also be referred to as the non-HT PPDU format (Figure 7(a)).

[0085] The HT PPDU format (IEEE 802.11n) further includes the HT-SIG, HT-STF, and HT-LFT(s) fields in addition to the basic PPDU format. The HT PPDU format shown in Figure 7(b) can be referred to as the HT-mixed format. The HT-greenfield format PPDU may be further defined, which does not include L-STF, L-LTF, and L-SIG, and consists of the HT-GF-STF, HT-LTF1, HT-SIG, one or more HT-LTF, and Data fields (not shown).

[0086] An example of the VHT PPDU format (IEEE 802.11ac) further includes the VHT SIG-A, VHT-STF, VHT-LTF, and VHT-SIG-B fields in addition to the basic PPDU format (Figure 7(c)).

[0087] An example of the HE PPDU format (IEEE 802.11ax) further includes the RL-SIG (Repeated L-SIG), HE-SIG-A, HE-SIG-B, HE-STF, HE-LTF(s), and PE (Packet Extension) fields in addition to the basic PPDU format (Figure 7(d)). Depending on the specific example of the HE PPDU format, some fields may be omitted or their lengths may change. For example, the HE-SIG-B field is included in the HE PPDU format for multiple users (MU), but not in the HE PPDU format for single users (SU). Also, the HE trigger-based (TB) PPDU format does not include HE-SIG-B, and the length of the HE-STF field may be changed to 8us. The HE ER (Extended Range) SU PPDU format does not include the HE-SIG-B field, and the length of the HE-SIG-A field may be changed to 16us. For example, RL-SIG may be configured identically to L-SIG. Based on the presence of RL-SIG, the receiving STA can determine that the received PPDU is either an HE PPDU or an EHT PPDU, as described later.

[0088] The EHT PPDU format may include the EHT MU (multi-user) format shown in Figure 7(e) and the EHT TB (trigger-based) PPDU format shown in Figure 7(f). The EHT PPDU format is similar to the HE PPDU format in that it includes an RL-SIG following the L-SIG, but it may also include a U (universal)-SIG, EHT-SIG, EHT-STF, and EHT-LTF following the RL-SIG.

[0089] The EHT MU PPDU in Figure 7(e) corresponds to a carry PPDU that carries one or more data (or PSDUs) for one or more users. In other words, the EHT MU PPDU may be used for either SU transmission or MU transmission. For example, the EHT MU PPDU may correspond to a PPDU for one receiving STA or multiple receiving STAs.

[0090] The EHT TB PPDU in Figure 7(f) omits the EHT-SIG compared to the EHT MU PPDU. An STA that receives a trigger for UL MU transmission (e.g., a trigger frame or TRS (triggered response scheduling)) can perform UL transmission based on the EHT TB PPDU format.

[0091] The L-STF, L-LTF, L-SIG, RL-SIG, U-SIG (Universal SIGNAL), and EHT-SIG fields may be encoded and modulated so that they can be attempted to be demodulated and decoded even by legacy STAs, and may be mapped based on a defined subcarrier frequency interval (e.g., 312.5 kHz). These may be referred to as pre-EHT modulated fields. Next, the EHT-STF, EHT-LTF, Data, and PE fields may be encoded and modulated so that they can be demodulated and decoded by STAs that have successfully decoded non-legacy SIGs (e.g., U-SIG and / or EHT-SIG) and obtained the information contained in those fields, and may be mapped based on a defined subcarrier frequency interval (e.g., 78.125 kHz). These may be referred to as EHT modulated fields.

[0092] Similarly, in the HE PPDU format, the L-STF, L-LTF, L-SIG, RL-SIG, HE-SIG-A, and HE-SIG-B fields can be referred to as pre-HE modulated fields, while the HE-STF, HE-LTF, Data, and PE fields can be referred to as HE modulated fields. Furthermore, in the VHT PPDU format, the L-STF, L-LTF, L-SIG, and VHT-SIG-A fields can be referred to as pre-VHT modulated fields, while the VHT STF, VHT-LTF, VHT-SIG-B, and Data fields can be referred to as VHT modulated fields.

[0093] The U-SIG included in the EHT PPDU format in Figure 7 may be composed of, for example, two symbols (e.g., two consecutive OFDM symbols). Each symbol for the U-SIG (e.g., an OFDM symbol) may have a duration of 4us, and the U-SIG may have a total duration of 8us. Each symbol of the U-SIG may be used to transmit 26 bits of information. For example, each symbol of the U-SIG may be transmitted and received based on 52 data tones and 4 pilot tones.

[0094] U-SIGs may be configured in 20MHz units. For example, when an 80MHz PPDU is configured, identical U-SIGs may be duplicated in 20MHz units. That is, an 80MHz PPDU may contain four identical U-SIGs. When the bandwidth exceeds 80MHz, for example, for a 160MHz PPDU, the first 80MHz U-SIG and the second 80MHz U-SIG may be different from each other.

[0095] In a U-SIG, for example, A uncoded bits may be transmitted, and the first U-SIG symbol (e.g., U-SIG-1 symbol) may transmit the first X bits of the total A bits, while the second U-SIG symbol (e.g., U-SIG-2 symbol) may transmit the remaining Y bits of the total A bits. The A bits (e.g., 52 uncoded bits) may include a CRC field (e.g., a 4-bit field) and a tail field (e.g., a 6-bit field). The tail field may be used to terminate the trellis of the convolution decoder and may be set to 0, for example.

[0096] The A bit information transmitted by U-SIG can be distinguished into version-independent bits and version-dependent bits. For example, a new PPDU format not shown in Figure 7 (e.g., UHR PPDU format) may include U-SIG, and the format of the U-SIG field in the EHT PPDU format and the format of the U-SIG field in the UHR PPDU format may be the same, while the version-independent bits may differ in some or all respects.

[0097] For example, the size of the version-independent bits of a U-SIG may be fixed or variable. The version-independent bits may be assigned only to U-SIG-1 symbols, or to both U-SIG-1 and U-SIG-2 symbols. Version-independent and version-dependent bits may be referred to by various names, such as the first control bit and the second control bit.

[0098] For example, the version-independent bits of the U-SIG may include a 3-bit physical layer version identifier (PHY version identifier), which can indicate the PHY version of the transmitted and received PPDUs (e.g., EHT, UHR, etc.). The version-independent bits of the U-SIG may include a 1-bit UL / DL flag field. The first value of the 1-bit UL / DL flag field relates to UL communication, and the second value relates to DL communication. The version-independent bits of the U-SIG may also include information about the length of the TXOP (transmission opportunity) and information about the BSS color ID.

[0099] For example, the version-dependent bits of the U-SIG may include information that directly or indirectly indicates the type of PPDU (e.g., SU PPDU, MU PPDU, TB PPDU, etc.).

[0100] The U-SIG may include information necessary for transmitting and receiving PPDUs. For example, the U-SIG may further include information about bandwidth, information about the MCS technique applied to non-legacy SIGs (e.g., EHT-SIG or UHR-SIG), information indicating whether a dual carrier modulation (DCM) technique (e.g., a technique for reusing the same signal on two subcarriers to achieve an effect similar to frequency diversity) is applied to the non-legacy SIG, information about the number of symbols used for the non-legacy SIG, and information about whether the non-legacy SIG is generated across the entire bandwidth.

[0101] Some of the information necessary for sending and receiving PPDUs may be included in the U-SIG and / or non-legacy SIGs (e.g., EHT-SIG or UHR-SIG). For example, information regarding the type of non-legacy LTF / STF (e.g., EHT-LTF / EHT-STF or UHR-LTF / UHR-STF), information regarding the length and cyclic prefix (CP) length of non-legacy LTFs, information regarding the guard interval (GI) applicable to non-legacy LTFs, information regarding preamble puncturing applicable to PPDUs, and information regarding resource unit (RU) allocation may be included only in the U-SIG, only in the non-legacy SIG, or indicated by a combination of information included in the U-SIG and information included in the non-legacy SIG.

[0102] Preamble puncturing can mean the transmission of a PPDU in which one or more frequency units within the PPDU's bandwidth are not present. For example, the size of the frequency units (or the resolution of preamble puncturing) may be defined as 20 MHz, 40 MHz, etc. For example, preamble puncturing may be applied to PPDU bandwidths of a certain size or larger.

[0103] In the example shown in Figure 7, non-legacy SIGs such as HE-SIG-B and EHT-SIG may contain control information for the receiving STA. Non-legacy SIGs may be transmitted with at least one symbol, which may have a length of 4us. Information regarding the number of symbols used for the EHT-SIG may be included in a previous SIG (e.g., HE-SIG-A, U-SIG, etc.).

[0104] Non-legacy SIGs such as HE-SIG-B and EHT-SIG may include common fields and user-specific fields. Common fields and user-specific fields may be coded separately.

[0105] In some cases, the common field may be omitted. For example, in a compressed mode where non-OFDMA (orthogonal frequency multiple access) is applied, the common field may be omitted, and multiple STAs can receive PPDUs (e.g., the data fields of the PPDU) in the same frequency band. In an uncompressed mode where OFDMA is applied, multiple users can receive PPDUs (e.g., the data fields of the PPDU) in separate frequency bands.

[0106] The number of user-specific fields may be determined based on the number of users. A single user block field may contain a maximum of two user fields. Each user field may be associated with either MU-MIMO or non-MU-MIMO assignments.

[0107] The common field may include a CRC bit and a Tail bit, the length of the CRC bit may be determined to be 4 bits, and the length of the Tail bit may be determined to be 6 bits and set to 000000. The common field may include RU allocation information. The RU allocation information may include information about the location of RUs to which multiple users (i.e., multiple receiving STAs) are assigned.

[0108] A RU may contain multiple subcarriers (or tones). RUs may be used when transmitting signals to multiple STAs based on the OFDMA method. Alternatively, a RU may be defined when transmitting a signal to a single STA. Resources may be allocated on a RU basis for non-legacy STFs, non-legacy LTFs, and Data fields.

[0109] The applicable size of RUs may be defined by the PPDU bandwidth. RUs may be defined to be identical or different for the applicable PPDU format (e.g., HE PPDU, EHT PPDU, UHR PPDU, etc.). For example, for an 80MHz PPDU, the RU arrangement for HE PPDU and EHT PPDU may differ from each other. The applicable RU size, number of RUs, RU locations, DC (direct current) subcarrier locations and number, null subcarrier locations and number, guard subcarrier locations and number, etc., for each PPDU bandwidth can be called a tone plan. For example, a tone plan for a wide bandwidth may be defined as multiple iterations of a low-bandwidth tone plan.

[0110] RUs of various sizes may be defined as 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, 484-tone RUs, 996-tone RUs, 2×996-tone RUs, 4×996-tone RUs, etc. An MRU (multiple RU) is distinct from multiple individual RUs and corresponds to a group of subcarriers composed of multiple RUs. For example, one MRU may be defined as 52+26 tones, 106+26 tones, 484+242 tones, 996+484 tones, 996+484+242 tones, 2×996+484 tones, 3×996 tones, or 3×996+484 tones. Furthermore, the multiple RUs that make up a single MRU may or may not be consecutive in the frequency domain.

[0111] The specific size of a RU may be reduced or expanded. Therefore, the specific size of each RU (i.e., the number of corresponding tones) in this disclosure is illustrative and not restrictive. Also, in this disclosure, the number of RUs within a given bandwidth (e.g., 20, 40, 80, 160, 320 MHz, ...) may vary depending on the size of the RU.

[0112] In the PPDU format shown in Figure 7, the names of the fields are illustrative and do not limit the scope of this disclosure. Furthermore, the examples in this disclosure may apply not only to the PPDU format illustrated in Figure 7, but also to new PPDU formats that are based on the PPDU format in Figure 7 but with some fields excluded and / or some fields added.

[0113] Resource Unit

[0114] Figures 8 to 10 illustrate examples of resource units in a wireless LAN system to which this disclosure can be applied.

[0115] Referring to Figures 8 to 10, a resource unit (RU) defined in a wireless LAN system will be explained. An RU may contain multiple subcarriers (or tones). An RU may be used when transmitting a signal to multiple STAs based on the OFDMA method. An RU may also be defined when transmitting a signal to a single STA. An RU may be used for the STF, LTF, data field, etc., of a PPDU.

[0116] As shown in Figures 8 to 10, RUs corresponding to different numbers of tones (i.e., subcarriers) can be used to constitute some fields of a 20MHz, 40MHz, or 80MHz X-PPDU (where X is HE, EHT, etc.). For example, resources may be allocated in units of RUs shown for the X-STF, X-LTF, and Data fields.

[0117] Figure 8 shows an example of resource unit (RU) configuration used in the 20 MHz bandwidth.

[0118] As shown at the top of Figure 8, 26 units (i.e., units corresponding to 26 tones) may be allocated. Six tones may be used as a guard band in the leftmost band of the 20MHz band, and five tones may be used as a guard band in the rightmost band of the 20MHz band. In addition, seven DC tones may be inserted in the center band, i.e., the DC band, and there may be 26 units corresponding to 13 tones on each side of the DC band. Furthermore, 26, 52, or 106 units may be allocated to the other bands. Each unit may be allocated for the STA or the user.

[0119] The RU configuration in Figure 8 can be used not only for situations involving multiple users (MU) but also for situations involving a single user (SU), in which case it is possible to use one 242 unit as shown at the bottom of Figure 8. In this case, three DC tones may be inserted.

[0120] In the example shown in Figure 8, various sizes of RUs are illustrated, such as 26-RU, 52-RU, 106-RU, and 242-RU, but the specific sizes of such RUs may be reduced or expanded. Therefore, the specific size of each RU (i.e., the number of corresponding tones) is not limited in this disclosure and is illustrative. Also, in this disclosure, the number of RUs within a given bandwidth (e.g., 20, 40, 80, 160, 320 MHz, ...) may differ depending on the size of the RU. The same applies to the example in Figure 8 as to the example in Figure 9 and / or Figure 10 described below, in which the size and / or number of RUs may be changed.

[0121] Figure 9 shows an example arrangement of resource units (RUs) used in the 40 MHz bandwidth.

[0122] Just as various sizes of RU were used in the example in Figure 8, 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, etc., may be used in the example in Figure 9. In addition, five DC tones may be inserted at the center frequency, twelve tones may be used as a guard band in the leftmost band of the 40MHz bandwidth, and eleven tones may be used as a guard band in the rightmost band of the 40MHz bandwidth.

[0123] Furthermore, as shown in the figure, 484-RU may be used when it is used for a single user.

[0124] Figure 10 shows an example arrangement of resource units (RUs) used in the 80 MHz bandwidth.

[0125] Just as various sizes of RUs were used in the examples in Figures 8 and 9, 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, etc., may be used in the example in Figure 10. Furthermore, in the 80MHz PPDU, the RU arrangement of the HE PPDU and EHT PPDU may differ from each other, and the example in Figure 10 shows an example of the RU arrangement for the 80MHz EHT PPDU. In the example in Figure 10, the leftmost band of the 80MHz bandwidth uses 12 tones as a guard band, and the rightmost band of the 80MHz bandwidth uses 11 tones as a guard band, which is the same for both the HE PPDU and the EHT PPDU. Unlike the HE PPDU, where seven DC tones are inserted into the DC band and there is one 26-RU on each side of the DC band corresponding to 13 tones, the EHT PPDU has 23 DC tones inserted into the DC band and one 26-RU on both the left and right sides of the DC band. Unlike the HE PPDU, where there is one null subcarrier between 242-RUs that are not in the center band, the EHT PPDU has five null subcarriers. In the HE PPDU, one 484-RU does not contain null subcarriers, but in the EHT PPDU, one 484-RU contains five null subcarriers.

[0126] Furthermore, as shown in the same figure, the 996-RU may be used when used for a single user, and in this case, the insertion of five DC tones is common to both the HE PPDU and the EHT PPDU.

[0127] An EHT PPDU of 160MHz or higher may be configured with multiple 80MHz subblocks as shown in Figure 10. The RU configuration for each 80MHz subblock may be the same as the RU configuration for the 80MHz EHT PPDU in Figure 10. When the 80MHz subblock of a 160MHz or 320MHz EHT PPDU is not punctured and the entire 80MHz subblock is used as part of an RU or MRU (Multiple RU), the 80MHz subblock may use RU 996-996 as shown in Figure 10.

[0128] Here, an MRU corresponds to a group of subcarriers (or tones) composed of multiple RUs, and the multiple RUs constituting an MRU may be of the same size or of different sizes. For example, a single MRU may be defined as 52+26 tones, 106+26 tones, 484+242 tones, 996+484 tones, 996+484+242 tones, 2×996+484 tones, 3×996 tones, or 3×996+484 tones. Here, the multiple RUs constituting a single MRU may correspond to small-sized (e.g., 26, 52, 106) RUs or large-sized (e.g., 242, 484, 996, etc.) RUs. That is, a single MRU containing both small-sized and large-sized RUs may not be set / defined. Also, the multiple RUs constituting a single MRU may or may not be consecutive in the frequency domain.

[0129] If the 80MHz subblock contains RUs smaller than 996 tones, or if a portion of the 80MHz subblock is punctured, the 80MHz subblock may use an RU arrangement that excludes the 996-tone RU.

[0130] The RUs of this disclosure may be used in uplink (UL) and / or downlink (DL) communication. For example, in the case of trigger-based UL-MU communication, an STA (e.g., AP) transmitting a trigger may use trigger information (e.g., a trigger frame or TRS (triggered response scheduling)) to assign a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a first STA and a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a second STA. The first STA can then transmit a first trigger-based (TB) PPDU based on the first RU, and the second STA can transmit a second TB PPDU based on the second RU. The first and second TB PPDUs may be transmitted to the AP in the same time interval.

[0131] For example, when a DL MU PPDU is configured, the STA (e.g., AP) transmitting the DL MU PPDU can assign a first RU (e.g., 26 / 52 / 106 / 242-RU) to the first STA and a second RU (e.g., 26 / 52 / 106 / 242-RU) to the second STA. That is, the transmitting STA (e.g., AP) can transmit the X-STF (e.g., X is HE, EHT, etc.), X-LTF, and Data fields for the first STA through the first RU within a single MU PPDU, and the X-STF, X-LTF, and Data fields for the second STA through the second RU. Information regarding the RU placement may be signaled through the X-SIG (e.g., X is HE, EHT, U) field in the X-PPDU format.

[0132] Distributed resource units

[0133] Regulations in various regions may impose limitations on power spectral density (PSD) in the sub-7GHz (e.g., 6GHz) band. For non-AP STAs in the low-power indoor (LPI) band, the PSD limit may be -1dBm / MHz. For example, for an existing 52-tone RU, the maximum transmit (Tx) power can be approximately 6dBm.

[0134] Furthermore, separate restrictions may be applied to the 2.4GHz and 5GHz bands. For example, in the EU / China / Japan / Korea, a PSD limit of 10dBm / MHz may be applied to the 2.4GHz band. This means that the maximum Tx power for an existing 52-tone RU could be approximately 17dBm. If the PSD limit can be avoided in the 5GHz band, the transmit power can be increased. For example, the maximum transmit power for an existing 52-tone RU is 24dBm, which is still 6dBm lower than the maximum allowable EIRP (effective isotropic radiated power) of 30dBm.

[0135] Overcoming PSD limitations allows for increased transmit power, which can either enhance spectral efficiency or extend the range.

[0136] Considering that the PSD limit is defined per MHz for each STA, distributing the tones of small-sized RUs across a wide bandwidth results in non-contiguous tones for each STA, and therefore each tone can be transmitted at high power. RUs containing such distributed tones are called distributed RUs (DRUs), and to distinguish them, RUs containing continuous tones as defined in existing wireless LAN systems (e.g., systems conforming to IEEE 802.11ax, 11be, etc.) can be called regular RUs (RRUs).

[0137] Compared to existing STAs that transmit RRUs, STAs that transmit DRUs can use higher power. For example, a 52-tone DRU spanning 80 MHz has only one tone per MHz, while a 52-tone RRU has approximately 13 tones per MHz. Assuming a PSD limit of -1 dBm / MHz in the 6 GHz LPI band, using a DRU allows for a transmit power increase of approximately 11 dB compared to a 52-tone RRU. This increased transmit power allows for the application of higher MCSs and supports longer ranges.

[0138] Figure 11 is a diagram illustrating an example of a DRU to which this disclosure may apply.

[0139] In the example shown in Figure 11, STA1 transmits on DRU1, STA2 transmits on DRU2, and STA3 transmits on DRU3. Each STA can apply a transmit power boost by using a DRU. Compared to using an RRU of the same size, a DRU allows for higher transmit power to be applied to all tones, which can significantly improve spectral efficiency. Thus, DRUs can be particularly useful in UL-OFDMA.

[0140] DRUs can also be utilized in APs. In some cases, an AP can use only some of DRU1, DRU2, and DRU3 to perform DL-OFDMA transmission to the STA, in which case a transmit power boost due to the use of DRUs may be applied.

[0141] To maximize power boost, tones within a single DRU may be dispersed as far apart as possible. For example, a DRU containing one tone per MHz may be considered an optimal example. The size of a DRU (or the number of available tones contained in one DRU, i.e., the number of remaining tones after excluding unusable tones such as null tones, guard tones, and DC tones) may be defined identically to the size of an RRU (or the number of available tones contained in one RRU). This minimizes the impact on various existing technologies defined based on RRUs. The table below shows examples of achievable power boosts (in dB) for various DRUs distributed across different bandwidths. The examples in the table assume a 6 GHz LPI bandwidth, but power boosts can also be obtained in the 2.4 GHz and 5 GHz bandwidths in other regions. For example, in an 80 MHz UL-OFDMA transmission by 8 users, if each user uses a 106-tone DRU, the overall performance can be improved by approximately 8.13 dB compared to if each user uses a 106-tone RRU. Thus, by utilizing DRUs, PSD limitations can be overcome and considerable gains can be obtained.

[0142] [Table 1]

[0143] Trigger frame

[0144] Figure 12 shows an exemplary format of a trigger frame to which this disclosure may apply.

[0145] A trigger frame can allocate resources for one or more TB PPDU transfers and request TB PPDU transfers. The trigger frame may further include other information requested by the STA that transfers the TB PPDU in response. The trigger frame may include common info and user info list fields in its frame body.

[0146] The common information field may include information that applies in common to one or more TB PPDU transfers requested by a trigger frame, such as the trigger type, UL length, whether or not there are subsequent trigger frames (e.g., More TF), whether or not a CS (channel sensing) request is made, and UL BW (bandwidth). Figure 12 illustrates the common information field format for an EHT variant.

[0147] The 4-bit trigger type subfield may have values ​​from 0 to 15. Of these, values ​​0, 1, 2, 3, 4, 5, 6, and 7 of the trigger type subfield are defined to correspond to basic, BFRP (Beamforming Report Poll), MU-BAR (multi user-block acknowledgement request), MU-RTS (multi user-request to send), BSRP (Buffer Status Report Poll), GCR (groupcast with retries) MU-BAR, BQRP (Bandwidth Query Report Poll), and NFRP (NDP Feedback Report Poll), respectively, while values ​​from 8 to 15 are defined as reserved.

[0148] Among the common information, the trigger-dependent common info subfield may contain information that is selectively included based on the trigger type.

[0149] A special user info field may be included within the trigger frame. The special user info field does not contain user-specific information, but it does contain extended common information not provided in the common information field.

[0150] The user information list contains zero or more user info fields. Figure 12 illustrates the EHT variant user info field format.

[0151] The AID12 subfield essentially indicates that it is a user information field for the STA having that AID. It may also be used for other purposes, such as assigning a Random Access (RA)-RU when the AID12 field has a predetermined specific value, or being configured as a special user info field. A special user info field does not contain user-specific information but is a user information field that includes extended common information not provided in the common information field. For example, a special user info field may be identified by the AID12 value 2007, and a special user info field flag subfield within the common information field may indicate whether or not it contains a special user info field.

[0152] The RU allocation subfield can indicate the size and location of the RU / MRU. For this purpose, the RU allocation subfield may be analyzed together with the PS160 (primary / secondary 160MHz) subfield of the user information field, the UL BW subfield of the common information field, and so on.

[0153] For example, as shown in Table 2 below, the mapping of B7-B1 of the RU assignment subfield may be defined along with the settings of B0 and PS160 subfields of the RU assignment subfield. Table 2 shows an example of encoding for the PS160 subfield and RU assignment subfield of the EHT variant user information field.

[0154] [Table 2]

[0155] JPEG2026511970000004.jpg116104

[0156] JPEG2026511970000005.jpg75103

[0157] Setting B0 in the RU assignment subfield to 0 indicates that the RU / MRU assignment applies to the primary 80MHz channel, while setting it to 1 indicates that the RU assignment applies to the secondary 80MHz channel of the primary 160MHz channel. Setting B0 in the RU assignment subfield to 0 indicates that the RU / MRU assignment applies to the lower 80MHz of the secondary 160MHz channel, while setting it to 1 indicates that the RU assignment applies to the upper 80MHz of the secondary 160MHz channel.

[0158] In the trigger frame RU assignment table in Table 2, the parameter N may be calculated based on the formula N = 2 * X1 + X0. For bandwidths of 80 MHz or less, the PS160, B0, X0, and X1 values ​​may be set to 0. For 160 MHz and 320 MHz bandwidths, the PS160, B0, X0, and X1 values ​​may be set as shown in Table 3. Such settings indicate the absolute frequency order for the primary and secondary 80 MHz and 160 MHz channels. The order from left to right represents the order from lower frequencies to higher frequencies. The primary 80 MHz channel is denoted as P80, the secondary 80 MHz channel as S80, and the secondary 160 MHz channel as S160.

[0159] [Table 3]

[0160] DRU tone plan-based transmission and reception supporting preamble puncturing

[0161] As mentioned above, in order to overcome the PSD limitation and improve power gain, a DRU using dispersed tone / subcarrier may be applied instead of an RRU using continuous tone / subcarrier.

[0162] This disclosure describes definitions for DRU tone plans of various sizes and transmission / reception strategies based thereon for DRU-based transmission / reception using PPDUs that consider preamble puncturing in bandwidths including 80 MHz channels.

[0163] Tone plans for an 80 MHz bandwidth may include examples supporting various sizes of existing RRUs (e.g., Figure 10) and examples for various sizes of DRUs relating to this disclosure. In tone plans for DRU applications supporting preamble puncturing, the number of tones / subcarriers in each preamble puncturing-supporting DRU (i.e., DRU size) is the same as the number of tones / subcarriers in the corresponding preamble puncturing-supporting RRU (i.e., RRU size), but the positions of each tone / subcarrier in the frequency domain may be defined to be different from each other. For example, tone plans supporting 26-tone DRUs, 52-tone DRUs, 106-tone DRUs, 242-tone DRUs, and 484-tone DRUs may be defined for an 80 MHz bandwidth supporting preamble puncturing, but a 996-tone DRU is not included in the examples of this disclosure because it cannot support tone / subcarrier dispersion.

[0164] In the examples of this disclosure, it is assumed that the number and location of DC subcarriers, null subcarriers, and guard subcarriers in the DRU tone plan for an 80 MHz bandwidth are the same as in the RRU tone plan for an 80 MHz bandwidth. That is, of the 1024 subcarriers in the 80 MHz bandwidth, the DC subcarriers may be the 23 subcarriers in the middle of the 80 MHz bandwidth, and the guard subcarriers may be the 12 subcarriers on the far left and the 11 subcarriers on the far right of the 80 MHz bandwidth. Null subcarriers number 42 for 26-tone DRU and 52-tone (subcarrier indices -500, -447, -446, -393, -366, -313, -312, -259, -258, -257, -256, -255, -254, -253, -200, -199, -146, -119, -66, -65, -12, 12, 65, 66, 119, 146, 1 There are 26 subcarrier indices for 106 tone DRUs (subcarrier indices -500, -393, -366, -259, -258, -257, -256, -255, -254, -253, -146, -119, -12, 12, 1) corresponding to 99, 200, 253, 254, -255, -256, -146, -119, -12, 12, 1 This corresponds to 19, 146, 253, 254, 255, 256, 257, 258, 259, 366, 393, and 500), and for 242-tone DRUs and 484-tone DRUs, it may correspond to 10 (subcarrier indices -258, -257, -256, -255, -254, 254, 255, 256, 257, and 258) (i.e., 16 of the 42 null subcarrier positions considered in 26-tone DRUs and 52-tone DRUs are used as available subcarriers in 106-tone DRUs, and 16 of the 26 null subcarrier positions considered in 106-tone DRUs are used as available subcarriers in 242-tone DRUs and 484-tone DRUs). In the following explanation, the remaining subcarriers within the bandwidth, excluding the DC subcarrier, null subcarrier, and guard subcarrier, can be referred to as available subcarriers.

[0165] In such an 80 MHz bandwidth, when preamble puncturing is applied to one of four 20 MHz channels, various sizes of DRU tone plans may be defined and applied to the remaining available subcarriers (i.e., available subcarriers in a contiguous / non-contiguous 60 MHz channel) excluding the available subcarriers in the 20 MHz channel being preamble punctured. That is, in this disclosure, 20 MHz may be considered as the channel size to which preamble puncturing is applied within an 80 MHz bandwidth, and when preamble puncturing is applied to a 40 MHz channel, a 40 MHz RRU tone plan or DRU tone plan may be applied to the remaining 40 MHz, the tone plan for the remaining 40 MHz is not described in this disclosure.

[0166] For example, of the 1024 subcarriers in an 80MHz channel, the remaining subcarriers after excluding 23 DC subcarriers, 42 null subcarriers corresponding to 4 20MHz channels, and 23 guard subcarriers can be called the available subcarriers in the 80MHz channel. Of these available subcarriers in the 80MHz channel, the remaining subcarriers after further excluding the available subcarrier corresponding to one punctured 20MHz channel (i.e., the remaining subcarriers after excluding DC / null / guard subcarriers from all subcarriers corresponding to that 20MHz) can be called the available subcarriers in the 60MHz channel.

[0167] Figure 13 is a diagram illustrating an example of a DRU tone plan-based PPDU receiving method that supports preamble puncturing of the first STA according to this disclosure.

[0168] In step S1310, the first STA can generate a PPDU containing one or more fields that are mapped onto one or more DRUs.

[0169] For example, one or more fields may contain data fields. That is, the data fields of a PPDU may be generated by mapping them onto one or more DRUs of varying sizes.

[0170] When preamble puncturing is applied to one of four 20MHz channels in a bandwidth including an 80MHz channel, a PPDU may be generated that is transmitted on the remaining 60MHz channels, excluding the one 20MHz channel (i.e., the channel being punctured).

[0171] For example, if one 20MHz channel to be punctured is the lowest (or first in order) of four 20MHz channels within an 80MHz bandwidth, the 60MHz channel may be contiguous in the frequency domain (i.e., it may include the second, third, and fourth 20MHz channels in order). Or, if one 20MHz channel to be punctured is the highest (or fourth in order) of four 20MHz channels within an 80MHz bandwidth, the 60MHz channel may be contiguous in the frequency domain (i.e., it may include the first, second, and third 20MHz channels in order). Or, based on the fact that one 20MHz channel to be punctured is the second lowest (or second in order) of four 20MHz channels within an 80MHz bandwidth, the 60MHz channel may be discontinuous in the frequency domain (i.e., it may include the first, third, and fourth 20MHz channels in order, or it may include a lower 20MHz channel and a higher 40MHz channel). Alternatively, based on the fact that one punctured 20MHz channel is the second highest (or third in order) 20MHz channel among four 20MHz channels within an 80MHz bandwidth, the 60MHz channel may be discontinuous in the frequency domain (i.e., it may include the first, second, and fourth 20MHz channels in order, or a lower 40MHz channel and a higher 20MHz channel).

[0172] If one or more DRUs include any one 26-tone DRU, then that 26-tone DRU may be any one of the 27 predefined 26-tone DRUs. Here, the nth (n=1,2,...,27) 26-tone DRU may include the nth lowest subcarrier among the available subcarriers in the 60MHz channel. Also, the nth (n=1,2,...,27) 26-tone DRU may include every 27th subcarrier among the available subcarriers in the 60MHz channel, and any one of these subcarriers may correspond to the aforementioned nth lowest subcarrier.

[0173] For example, if one 20MHz channel being punctured is the lowest 20MHz channel in the frequency domain among four 20MHz channels, the first 26-tone DRU index includes subcarrier indices -252, -225, -196, -169, -141, -113, -86, -57, -30, 22, 49, 78, 105, 133, 161, 188, 217, 244, 278, 305, 334, 361, 389, 417, 444, 473, and the second 26-tone DRU index includes subcarrier indices -251, -2 The third 26-tone DRU index includes subcarrier indices -250, -223, -194, -167, -139, -111, -84, -55, -28, -29, -336, -363, -390, -418, -445, and -474, and the fourth 26-tone DRU index includes subcarrier indices -250, -223, -194, -167, -139, -111, -84, -55, -28, -24, -51, -80, -107, -35, -163, -190, -219, -246, -280, -307, -336, -363, -391, -419, -448, and -475475, and the fourth 26-tone DRU index includes subcarrier indices -250, -223, -194, -167, -139, -111, -84, -55, -475, and -46-tone The tone DRU index includes subcarrier indices -249, -222, -193, -166, -138, -110, -83, -54, -27, 25, 52, 81, 108, 136, 164, 191, 220, 247, 281, 308, 337, 364, 392, 420, 449, 476, and the 5th tone DRU index includes subcarrier indices -248, -221, -192, -165, -137, -109, -82, -53, -26, 26, 53, 82, 109, 137, 165, 192, 221, 248, 282, 309, The sixth 26-tone DRU index includes subcarrier indices -247, -220, -191, -164, -136, -108, -81, -52, -25, 27, 54, 83, 110, 138, 166, 193, 222, 249, 283, 310, 339, 367, 395, 422, 451, 478, and the seventh 26-tone DRU index includes subcarrier indices -246, -219, -190, -163, -135, -107, -80, -51, -24, 28, 55, 84,The eighth 26-tone DRU index includes subcarrier indices -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, 480, and the ninth 26-tone DRU index includes subcarrier indices -244, -217, -188, -161 The 10th 26-tone DRU index includes subcarrier indices -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, -78, -49, -22, 30, 57, 86, 113, 141, 169, 196, 225, 252, 286, 315, 342, 370, 398, 425, 454, 481, and the 11th 26-tone DRU index includes subcarrier indices -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, 170, 197, 226, 260, 287, 316, 343, 371, 399, 426, 455, 482, and the 11th 26-tone DRU index The subcarrier indices include -242, -215, -186, -159, -131, -103, -76, -47, -20, 32, 59, 88, 115, 143, 171, 198, 227, 261, 288, 317, 344, 372, 400, 427, 456, 483, and the 12th 26 tone DRU index includes subcarrier indices -241, -214, -185, -158, -130, -102, -75, -46, -19, 33, 60, 89, 116, 144, 172, 201, 228, 262, 289, 318, 345, 373, 40 The 13th 26-tone DRU index includes subcarrier indices -240, -213, -184, -157, -129, -101, -74, -45, -18, 34, 61, 90, 117, 145, 173, 202, 229, 263, 290, 319, 346, 374, 402, 429, 458, 485, and the 14th 26-tone DRU index includes subcarrier indices -239, -212, -183, -156, -128, -100, -73, -44, -17, 35, 62, 91, 118, 147,The 15th 26-tone DRU index includes subcarrier indices -238, -211, -182, -155, -127, -99, -72, -43, -16, 36, 63, 92, 120, 148, 175, 204, 231, 265, 292, 321, 348, 376, 404, 431, 460, 487, and the 16th 26-tone DRU index includes subcarrier indices -237, -210, -181, -154, -126, - The 17th 26-tone DRU index includes subcarrier indices -236, -209, -180, -153, -125, -97, -70, -41, -14, 38, 67, 94, 122, 150, 177, 206, 233, 267, 294, 323, 350, 378, 406, 433, 462, 489, and the 18th 26-tone DRU index includes subcarrier indices -236, -209, -180, -153, -125, -97, -70, -41, -14, 38, 67, 94, 122, 150, 177, 206, 233, 267, 294, 323, 350, 378, 406, 433, 462, 489, and the 18th 26-tone DRU index includes subcarrier The indices include -235, -208, -179, -152, -124, -96, -69, -40, -13, 39, 68, 95, 123, 151, 178, 207, 234, 268, 295, 324, 351, 379, 407, 434, 463, 490, and the 19th 26-tone DRU index includes subcarrier indices -234, -207, -178, -151, -123, -95, -68, -39, 13, 40, 69, 96, 124, 152, 179, 208, 235, 269, 296, 325, 352, 380, 408, 435, 464, 49 The 20th 26-tone DRU index includes subcarrier indices -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, 236, 270, 297, 326, 353, 381, 409, 436, 465, 492, and the 21st 26-tone DRU index includes subcarrier indices -232, -205, -176, -149, -121, -93, -64, -37, 15, 42, 71, 98, 126, 154, 181, 210, 237, 271,The 22nd 26-tone DRU index includes subcarrier indices -231, -204, -175, -148, -120, -92, -63, -36, 16, 43, 72, 99, 127, 155, 182, 211, 238, 272, 299, 328, 355, 383, 411, 438, 467, 494, and the 23rd 26-tone DRU index includes subcarrier indices -230, -203, -17 The 24th 26-tone DRU index includes subcarrier indices -229, -202, -173, -145, -117, -90, -61, -34, -34, -18, -45, -44, -45, -413, -147, -145, -117, -90, -61, -34, -18, -45, -44, -101, -129, -157, -84, -213, -40, -274, -301, -330, -357, -413 The 25th 26-tone DRU index includes subcarrier indices -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, 241, 275, 302, 331, 358, 386, 414, 441, 470, 497, and the 26th 26-tone DRU index includes subcarrier indices -227, -198, -171, -143, -115, -88, -59 The 27th 26-tone DRU index may include subcarrier indices -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, 132, 160, 187, 216, 243, 277, 304, 333, 360, 388, 416, 443, 472, and 499, and the 27th 26-tone DRU index may include subcarrier indices -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, 132, 160, 187, 216, 243, 277, 304, 333, 360, 388, 416, 443, 472, and 499.

[0174] For example, if one 20MHz channel being punctured is the second lowest 20MHz channel in the frequency domain among four 20MHz channels, the first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, 22, 49, 78, 105, 133, 161, 188, 217, 244, 278, 305, 334, 361, 389, 417, 444, 473, and the second 26-tone DRU index includes subcarrier index -4 The third 26-tone DRU index includes subcarrier indices -497, -470, -441, -415, -387, -359, -332, -303, -276, 23, 50, 79, 106, 134, 162, 189, 218, 245, 279, 306, 335, 362, 390, 418, 445, 474, and the third 26-tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, 24, 51, 80, 107, 135, 163, 190, 219, 246, 280, 307, 336, 363, 391, 419, 448, 4 The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, 25, 52, 81, 108, 136, 164, 191, 220, 247, 281, 308, 337, 364, 392, 420, 449, and 476, while the fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, -356, -329, -300, -273, 26, 53, 82, 109, 137, 165, and 19 The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, 27, 54, 83, 110, 138, 166, 193, 222, 249, 283, 310, 339, 367, 395, 422, 451, 478, and the seventh 26-tone DRU index includes subcarrier indices -493, -466, -437, -410, -382, -354,The eighth 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, 480, and the ninth 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, 480, and the ninth 26-tone DRU index includes subcarrier Carrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, 30, 57, 86, 113, 141, 169, 196, 225, 252, 286, 315, 342, 370, 398, 425, 454, 481, and the 10th 26 tone DRU index includes subcarrier indices -490, -463, -434, -407, -379, -351, -324, -295, -268, 31, 58, 87, 114, 142, 170, 197, 226, 260, 287, 316, 343, 371, 39 The 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, 32, 59, 88, 115, 143, 171, 198, 227, 261, 288, 317, 344, 372, 400, 427, 456, 483, and the 12th 26-tone DRU index includes subcarrier indices -488, -461, -432, -405, -377, -349, -322, -293, -266, 33, 60, 89, 1 The 13th 26-tone DRU index includes subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, 34, 61, 90, 117, 145, 173, 202, 229, 263, 290, 319, 346, 374, 402, 429, 458, 485, and the 14th 26-tone DRU index includes subcarrier indices -486, -459, -430,The 15th 26-tone DRU index includes -403, -375, -347, -320, -291, -264, 35, 62, 91, 118, 147, 174, 203, 230, 264, 291, 320, 347, 375, 403, 430, 459, 486, and the 16th 26-tone DRU index includes subcarrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, 36, 63, 92, 120, 148, 175, 204, 231, 265, 292, 321, 348, 376, 404, 431, 460, 487, and the 16th 26-tone The tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, 37, 64, 93, 121, 149, 176, 205, 232, 266, 293, 322, 349, 377, 405, 432, 461, 488, and the 17th tone DRU index includes subcarrier indices -483, -456, -427, -400, -372, -344, -317, -288, -261, 38, 67, 94, 122, 150, 177, 206, 233, 267, 29 The 18th 26-tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, -343, -316, -287, -260, 39, 68, 95, 123, 151, 178, 207, 234, 268, 295, 324, 351, 379, 407, 434, 463, 490, and the 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, The 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, 14, 41, 70, 97, 125, 153, 180, 209, 236, 270, 297, 326, 353, 381, 409, 436, 465, 492, and the 21st 26-tone DRU index includes subcarrier index -479,-452, -423, -396, -368, -340, -311, -284, 15, 42, 71, 98, 126, 154, 181, 210, 237, 271, 298, 327, 354, 382, ​​410, 437, 466, 493, and the 22nd 26 tone DRU index includes subcarrier indices -478, -451, -422, -395, -367, -339, -310, -283, 16, 43, 72, 99, 127, 155, 182, 211, 238, 272, 299, 328, 355, 383, 411, 438, 467, 4 The 23rd 26-tone DRU index includes subcarrier indices -477, -450, -421, -394, -365, -338, -309, -282, 17, 44, 73, 100, 128, 156, 183, 212, 239, 273, 300, 329, 356, 384, 412, 439, 468, and 495, while the 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, 18, 45, 74, 101, 129, and 157. The 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280, 19, 46, 75, 102, 130, 158, 185, 214, 241, 275, 302, 331, 358, 386, 414, 441, 470, 497, and the 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, - The 27th 26-tone DRU index may include subcarrier indices -473, -444, -417, -389, -361, -334, -305, -278, -473, -472, -499, -473, -443, -472, -499, -473, -443, -472, -499, -473, -443, -472, -499, -473, -443, -472, -499, -473, -443, -472, -499.

[0175] For example, if one 20MHz channel being punctured is the second highest 20MHz channel in the frequency domain among four 20MHz channels, the first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, -243, -216, -187, -160, -132, -104, -77, -48, -21, 278, 305, 334, 361, 389, 417, 444, 473, and the second 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -38 Carrier indices -498, -471, -442, -415, -387, -359, -332, -303, -276, -242, -215, -186, -159, -131, -103, -76, -47, -20, 279, 306, 335, 362, 390, 418, 445, 474, and the third 26 tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, -241, -214, -185, -158, -130, -102, -75, -46, -1 The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, -240, -213, -184, -157, -129, -101, -74, -45, -18, 281, 308, 337, 364, 392, 420, 449, 476, and the fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, - The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, -238, -211, -182, -155, -127, -99, -72, -43, -16, -283, -310, -339, -367, -155, -127, -99, -72, -43, -16, -283, -310, -339, -367, -395, -422, -451, and -478.The seventh 26-tone DRU index includes subcarrier indices -493, -466, -437, -410, -382, -354, -327, -298, -271, -237, -210, -181, -154, -126, -98, -71, -42, -15, 284, 311, 340, 368, 396, 423, 452, 479, and the eighth 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, -236, -209, -180, -153, - The 9th 26-tone DRU index includes subcarrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, -235, -208, -179, -152, -124, -96, -69, -40, -13, 286, 315, 342, 370, 398, 425, 454, 481, and the 10th 26-tone DRU index includes subcarrier indices -490, -463, The 11th 26-tone DRU index includes subcarrier indices -434, -407, -379, -351, -324, -295, -268, -234, -207, -178, -151, -123, -95, -68, -39, 260, 287, 316, 343, 371, 399, 426, 455, 482, and the 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, -233, -206, -177, -150, -122, -94, -67, -38, 261, 288, 317, 344, 372, 400, The 12th 26-tone DRU index includes subcarrier indices -488, -461, -432, -405, -377, -349, -322, -293, -266, -232, -205, -176, -149, -121, -93, -64, -37, 262, 289, 318, 345, 373, 401, 428, 457, 484, and the 13th 26-tone DRU index includes subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, -231,The 14th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, -230, -203, -174, -147, -118, -91, -62, -35, 264, 291, 320, 347, 375, 403, 430, 459, 486, and the 15th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, -230, -203, -174, -147, -118, -91, -62, -35, 264, 291, 320, 347, 375, 403, 430, 459, 486, and the 15th 26-tone DRU index includes subcarrier Carrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, -229, -202, -173, -145, -117, -90, -61, -34, 265, 292, 321, 348, 376, 404, 431, 460, 487, and the 16th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, -228, -201, -172, -144, -116, -89, -60, -33, 266 The 17th 26-tone DRU index includes subcarrier indices -483, -456, -427, -400, -372, -344, -317, -288, -261, -227, -198, -171, -143, -115, -88, -59, -32, 267, 294, 323, 350, 378, 406, 433, 462, 489, and the 18th 26-tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, - The 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, -269, -296, -325, -352, -380, -408, -435, -464, -491, and the 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, -269, -296, -325, -352, -380, -408, -435, -464, -491,The 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, -251, -224, -195, -168, -140, -112, -85, -56, -29, 270, 297, 326, 353, 381, 409, 436, 465, 492, and the 21st 26-tone DRU index includes subcarrier indices -479, -452, -423, -396, -368, -340, -311, -284, -250, -223, -194, -167, -139, The 22nd 26-tone DRU index includes subcarrier indices -478, -451, -422, -395, -367, -339, -310, -283, -249, -222, -193, -166, -138, -110, -83, -54, -27, 272, 299, 328, 355, 383, 411, 438, 467, 494, and the 23rd 26-tone DRU index includes subcarrier indices -477, -450 The 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -108, -81, -52, -25, -474, -301, -330, -357, -413, -26, -273, -300, -329, -356, -384, -412, -439, -468, -495, and the 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, -247, -220, -191, -164, -136, -108, -81, -52, -25, -274, -301, -330, -357, -385, -413, The 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280, -246, -219, -190, -163, -135, -107, -80, -51, -24, 275, 302, 331, 358, 386, 414, 441, 470, 497, and the 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, -245, -218,The 27th 26-tone DRU index may include subcarrier indices -473, -444, -417, -389, -361, -334, -305, -278, -244, -217, -188, -161, -133, -105, -78, -49, -22, 277, 304, 333, 360, 388, 416, 443, 472, and 499.

[0176] For example, if one 20MHz channel being punctured is the highest 20MHz channel in the frequency domain among four 20MHz channels, the first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, 170, 197, 226, and the second 26-tone DRU index includes subcarrier indices The dex includes -498, -471, -442, -415, -387, -359, -332, -303, -276, -242, -215, -186, -159, -131, -103, -76, -47, -20, 32, 59, 88, 115, 143, 171, 198, 227, and the third 26 tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, -241, -214, -185, -158, -130, -102, -75, -46, -19, 33, 60, The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, -240, -213, -184, -157, -129, -101, -74, -45, -18, 34, 61, 90, 117, 145, 173, 202, 229, and the fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, -356, -329, -300, The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, -238, -211, -182, -155, -127, -99, -72, -43, -16, 36, 63, 92, 120, 148, 175, 204, 231, and the seventh 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, -238, -211, -182, -155, -127, -99, -72, -43, -16, 36, 63, 92, 120, 148, 175, 204, 231, and the seventh 26-tone DRU index isThe subcarrier indices include -493, -466, -437, -410, -382, -354, -327, -298, -271, -237, -210, -181, -154, -126, -98, -71, -42, -15, 37, 64, 93, 121, 149, 176, 205, 232, and the 8th 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, -236, -209, -180, -153, -125, -97, -70, -41, -14, 38, The 9th 26-tone DRU index includes subcarrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, -235, -208, -179, -152, -124, -96, -69, -40, -13, 39, 68, 95, 123, 151, 178, 207, 234, and the 10th 26-tone DRU index includes subcarrier indices -490, -463, -434, -407, -379, -351, -324, -295, The 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, 236, and the 12th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, 236, and the 12th 26-tone DRU index includes subcarrier The rear indices include -488, -461, -432, -405, -377, -349, -322, -293, -266, -232, -205, -176, -149, -121, -93, -64, -37, 15, 42, 71, 98, 126, 154, 181, 210, 237, and the 13th 26 tone DRU indices include the subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, -231, -204, -175, -148, -120, -92, -63, -36, 16, 43, 72, 99,The 14th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, -230, -203, -174, -147, -118, -91, -62, -35, 17, 44, 73, 100, 128, 156, 183, 212, 239, and the 15th 26-tone DRU index includes subcarrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, The 16th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, 241, and the 17th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, 241, and the 17th 26-tone DRU index includes subcarrier indices The indexes include -483, -456, -427, -400, -372, -344, -317, -288, -261, -227, -198, -171, -143, -115, -88, -59, -32, 20, 47, 76, 103, 131, 159, 186, 215, 242, and the 18th 26 tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, -343, -316, -287, -260, -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, The 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, 22, 49, 78, 105, 133, 161, 188, 217, 244, and the 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, -251,The 21st 26-tone DRU index includes subcarrier indices -479, -452, -423, -396, -368, -340, -311, -284, -250, -223, -194, -167, -139, -111, -84, -55, -28, 24, 51, 80, 107, 135, 163, 190, 219, 246, and the 22nd 26-tone DRU index includes subcarrier The A-index includes -478, -451, -422, -395, -367, -339, -310, -283, -249, -222, -193, -166, -138, -110, -83, -54, -27, 25, 52, 81, 108, 136, 164, 191, 220, 247, and the 23rd 26-tone DRU index includes subcarrier indices -477, -450, -421, -394, -365, -338, -309, -282, -248, -221, -192, -165, -137, -109, -82, -53, -26, 26, 53, 82, The 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, -247, -220, -191, -164, -136, -108, -81, -52, -25, 27, 54, 83, 110, 138, 166, 193, 222, 249, and the 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280 The 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, 251, and the 27th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, 251, and the 27th 26-tone DRU index isThe subcarrier indices may include -473, -444, -417, -389, -361, -334, -305, -278, -244, -217, -188, -161, -133, -105, -78, -49, -22, 30, 57, 86, 113, 141, 169, 196, 225, and 252.

[0177] Based on the fact that one or more DRUs include any one 52-tone DRU, such 52-tone DRU may be any one of the 12 predefined 52-tone DRUs.

[0178] For example, the first 52-tone DRU may include subcarriers contained in the first 26-tone DRU and the 15th 26-tone DRU. The second 52-tone DRU may include subcarriers contained in the second 26-tone DRU and the 16th 26-tone DRU. The third 52-tone DRU may include subcarriers contained in the third 26-tone DRU and the 17th 26-tone DRU. The fourth 52-tone DRU may include subcarriers contained in the fourth 26-tone DRU and the 18th 26-tone DRU. The fifth 52-tone DRU may include subcarriers contained in the sixth 26-tone DRU and the 19th 26-tone DRU. The sixth 52-tone DRU may include subcarriers contained in the seventh 26-tone DRU and the 20th 26-tone DRU. The seventh 52-tone DRU may include subcarriers contained in the eighth 26-tone DRU and the 21st 26-tone DRU. The 8th 52-tone DRU may contain subcarriers included in the 9th 26-tone DRU and the 22nd 26-tone DRU. The 9th 52-tone DRU may contain subcarriers included in the 10th 26-tone DRU and the 24th 26-tone DRU. The 10th 52-tone DRU may contain subcarriers included in the 11th 26-tone DRU and the 25th 26-tone DRU. The 11th 52-tone DRU may contain subcarriers included in the 12th 26-tone DRU and the 26th 26-tone DRU. The 12th 52-tone DRU may contain subcarriers included in the 13th 26-tone DRU and the 27th 26-tone DRU.

[0179] Based on the fact that one or more DRUs include any one 106-tone DRU, the 106-tone DRU may be any one of the six predefined 106-tone DRUs.

[0180] For example, the first 106-tone DRU may include subcarriers contained in the first 52-tone DRU and the seventh 52-tone DRU, and a first group corresponding to two of the twelve null subcarriers. The second 106-tone DRU may include subcarriers contained in the second 52-tone DRU and the eighth 52-tone DRU, and a second group corresponding to two of the other twelve null subcarriers. The third 106-tone DRU may include subcarriers contained in the third 52-tone DRU and the ninth 52-tone DRU, and a third group corresponding to two of the twelve null subcarriers. The fourth 106-tone DRU may include subcarriers contained in the fourth 52-tone DRU and the tenth 52-tone DRU, and a fourth group corresponding to two of the twelve null subcarriers. The fifth 106-tone DRU may include the subcarriers contained in the fifth 52-tone DRU and the eleventh 52-tone DRU, and the fifth group which corresponds to two more of the twelve null subcarriers. The sixth 106-tone DRU may include the subcarriers contained in the sixth 52-tone DRU and the twelfth 52-tone DRU, and the sixth group which corresponds to two more of the twelve null subcarriers.

[0181] Here, the indices of the 12 null subcarriers may be the remaining 12 null subcarriers from -447, -446, -313, -312, -200, -199, -66, -65, 65, 66, 199, 200, 312, 313, 446, and 447, excluding the 4 null subcarriers corresponding to the one 20MHz channel that is punctured. If we refer to these 12 null subcarriers as the 1st to 12th null subcarriers, then one of the 1st, 2nd, 3rd, 4th, 5th, and 6th groups of null subcarriers may include the 1st and 7th null subcarriers, another may include the 2nd and 8th null subcarriers, yet another may include the 3rd and 9th null subcarriers, yet another may include the 4th and 10th null subcarriers, yet another may include the 5th and 11th null subcarriers, and yet another may include the 6th and 12th null subcarriers.

[0182] Based on the fact that one or more DRUs include any one 242-tone DRU, the 242-tone DRU may be any one of the three predefined 242-tone DRUs.

[0183] For example, the first 242-tone DRU may include a seventh group, which corresponds to four of the other twelve null subcarriers, as well as the subcarriers included in the first 106-tone DRU, the fourth 106-tone DRU, and the fifth 26-tone DRU. The second 242-tone DRU may include a eighth group, which corresponds to four of the other twelve null subcarriers, as well as the subcarriers included in the second 106-tone DRU, the fifth 106-tone DRU, and the fourteenth 26-tone DRU. The third 242-tone DRU may include a ninth group, which corresponds to four of the subcarriers included in the third 106-tone DRU, the sixth 106-tone DRU, and the twenty-third 26-tone DRU, as well as four of the other twelve null subcarriers.

[0184] Here, the indices of the other 12 null subcarriers may correspond to the remaining 12 null subcarriers from -500, -393, -366, -259, -253, -146, -119, -12, 12, 119, 146, 253, 259, 366, 393, and 500, excluding the 4 null subcarriers corresponding to one 20MHz channel that is punctured. If we refer to these 12 null subcarriers as the 13th to 24th null subcarriers, then one of the 7th to 9th groups of null subcarriers may include the 13th, 16th, 19th, and 22nd null subcarriers, another may include the 14th, 17th, 20th, and 23rd null subcarriers, and yet another may include the 15th, 18th, 21st, and 24th null subcarriers.

[0185] Based on the fact that one or more DRUs include any one 484-tone DRU, the 484-tone DRU may include subcarriers included in a first 242-tone DRU and a second 242-tone DRU, or subcarriers included in a first 242-tone DRU and a third 242-tone DRU, or subcarriers included in a second 242-tone DRU and a third 242-tone DRU.

[0186] The DRU tone plans described above are illustrative, and the tones / subcarriers included in 26-tone DRUs, 52-tone DRUs, 106-tone DRUs, 242-tone DRUs, and 484-tone DRUs may be defined by various other examples described later.

[0187] If the 80MHz channel containing the aforementioned punctured 20MHz channel falls within a portion of the bandwidth exceeding 80MHz, the subcarrier indices in each of the one or more DRUs for the 80MHz channel containing the punctured 20MHz channel may be shifted according to their position within the bandwidth exceeding 80MHz. For reference in the following description, the set of subcarrier indices in each of the one or more DRUs for the x MHz channel containing the punctured 20MHz channel within a bandwidth of y MHz may be denoted as S_x_y.

[0188] For example, if one of two 80MHz channels in a 160MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (first S_80_160) may be the value obtained by subtracting 512 from the DRU subcarrier index for the 80MHz channel within the 80MHz bandwidth (S_80_80). If one of the 80MHz channels in a 160MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (second S_80_160) may be the value obtained by adding 512 to the DRU subcarrier index for the 80MHz channel within the 80MHz bandwidth (S_80_80).

[0189] For example, if one of the three 80MHz channels in a 240MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (first S_80_240) may be the same as the DRU subcarrier index for the 80MHz channel within the 80MHz bandwidth (S_80_80) minus 1024. If one of the middle 80MHz channels in the 240MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (second S_80_240) may be the same as the DRU subcarrier index for the 80MHz channel within the 80MHz bandwidth (S_80_80). If one 80MHz channel on the right side of a 240MHz bandwidth contains one punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (third S_80_240) may be the value obtained by adding 1024 to the DRU subcarrier index for the 80MHz channel within the 80MHz bandwidth (S_80_80).

[0190] For example, if one of the two leftmost 80MHz channels in a 320MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (first or second S_80_320) may be the value obtained by subtracting 1024 from the DRU subcarrier index for either of the two 80MHz channels in a 160MHz bandwidth (first or second S_80_160). If one of the two rightmost 80MHz channels in a 320MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (third or fourth S_80_320) may be the value obtained by adding 1024 to the DRU subcarrier index for either of the two 80MHz channels in a 160MHz bandwidth (first or second S_80_160).

[0191] For example, if one of the two leftmost 80MHz channels in a 480MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index (first or second S_80_480) for that 80MHz channel may be the same as the DRU subcarrier index (first or second S_80_160) for either of the two 80MHz channels in a 160MHz bandwidth, minus 2048. Similarly, if one of the two middle 80MHz channels in a 480MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index (third or fourth S_80_480) for that 80MHz channel may be the same as the DRU subcarrier index (first or second S_80_160) for either of the two 80MHz channels in a 160MHz bandwidth. If one of the two rightmost 80MHz channels in a 480MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (the fifth or sixth S_80_480) may be the value obtained by adding 2048 to the DRU subcarrier index for either of the two 80MHz channels in a 160MHz bandwidth (the first and second S_80_160).

[0192] For example, if one of the four leftmost 80MHz channels in a 640MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index (the first, second, third, or fourth S_80_640) for that 80MHz channel may be the value obtained by subtracting 2048 from the DRU subcarrier index (the first, second, third, or fourth S_80_320) for any one of the four 80MHz channels in a 320MHz bandwidth. If one of the four right-hand 80MHz channels in a 640MHz bandwidth contains a punctured 20MHz channel, the DRU subcarrier index for that 80MHz channel (the 5th, 6th, 7th, or 8th S_80_640) may be the value obtained by adding 2048 to the DRU subcarrier index for any one of the four 80MHz channels in a 320MHz bandwidth (the 1st, 2nd, 3rd, or 4th S_80_320).

[0193] In step S1320, the first STA can transmit PPDUs to one or more second STAs on the remaining 60MHz channels of the four 20MHz channels in the bandwidth including the 80MHz channel, excluding one 20MHz channel to which preamble puncturing is applied.

[0194] One or more DRUs may be specified based on the RU allocation information contained in the PPDU. For example, the PPDU may be a downlink PPDU (or DL-OFDMA PPDU).

[0195] Alternatively, one or more DRUs may be indicated based on RU assignment information contained in the trigger frame that triggers the transmission of the PPDU. For example, the PPDU may be a TB PPDU (or UL-OFDMA PPDU).

[0196] The method illustrated in the example in Figure 13 may be performed by the first device 100 in Figure 1. For example, one or more processors 102 of the first device 100 in Figure 1 may be configured to generate a PPDU containing one or more fields mapped onto one or more DRUs, and to transmit the PPDU to one or more second STAs on the remaining 60MHz channels of four 20MHz channels with a bandwidth including an 80MHz channel, excluding one 20MHz channel to which preamble puncturing is applied. Furthermore, one or more memories 104 of the first device 100 may store instructions for performing the method illustrated in Figure 13 or the example described later, when executed by one or more processors 102.

[0197] Figure 14 is a diagram illustrating an example of a DRU tone plan-based PPDU transmission method that supports preamble puncturing of the second STA as described herein.

[0198] In step S1410, the second STA can receive PPDUs containing one or more fields from the first STA on the remaining 60 MHz channels of the four 20 MHz channels in the bandwidth including the 80 MHz channel, excluding one 20 MHz channel to which preamble puncturing is applied.

[0199] In step S1420, the second STA can decode one or more fields mapped onto one or more DRUs.

[0200] For example, the second STA can determine the number and location of tone / subcarriers of one or more DRUs to which one or more fields (e.g., data fields) are mapped in the PPDU transmitted by the first STA, based on the RU assignment information contained in the PPDU, or based on the RU assignment information contained in the trigger frame that triggers the transmission of the PPDU. Based on this, the second STA can decode the one or more fields mapped to the one or more DRUs.

[0201] The various sizes (or number of tones / subcarriers) and positions of one or more DRUs are the same as those described in the example in Figure 13, and therefore, redundant explanations are omitted.

[0202] The method illustrated in the example in Figure 14 may be performed by the second device 200 in Figure 1. For example, one or more processors 202 of the second device 200 in Figure 1 may be configured to receive a PPDU containing one or more fields from the first STA on the remaining 60MHz channels of four 20MHz channels with a bandwidth including an 80MHz channel, excluding one 20MHz channel to which preamble puncturing is applied, and to decode the one or more fields mapped onto one or more DRUs. Furthermore, one or more memories 204 of the second device 200 may store instructions for performing the method illustrated in Figure 14 or the example described later, when executed by one or more processors 202.

[0203] The examples in Figures 13 and 14 may correspond to some of the various examples in this disclosure. The various examples in this disclosure, including those in Figures 13 and 14, will be described in more detail below.

[0204] In the embodiments described later, the DRU index (i.e., DRU-n) or the nth DRU may correspond to a position in the frequency domain, or it may be given independently of a position in the frequency domain. In the embodiments described later, for the sake of clarity of explanation, a relatively low DRU index will be described as including a relatively low tone / subcarrier, but the scope of this disclosure is not limited thereto, and the DRU index may be given in various ways to distinguish different DRUs from each other.

[0205] Furthermore, in the following explanation, the subcarrier index is assumed to correspond to the position in the frequency domain, with the DC subcarrier index being 0, and the term "subcarrier" may be replaced with "tone."

[0206] Furthermore, in the following explanation, the expression a:b:c for a subcarrier index means every b subcarrier indices from a to c. Also, in the following explanation, +-{a:b:c} means {-a:b:-c,a:b:c}. Also, in the following explanation, +-{a,b,c} means {-a,-b,-c,a,b,c}.

[0207] Example 1

[0208] In this embodiment, various examples of subcarrier indices constituting a 26-tone DRU are described.

[0209] Example 1-1

[0210] This embodiment relates to a method for assigning one subcarrier to each of 27 26-tone DRUs sequentially from the lowest available subcarrier to the highest available subcarrier when preamble puncturing is applied to the first of four 20-MHz channels in a bandwidth including an 80-MHz channel (i.e., the lowest 20-MHz channel). For example, each of the 27 26-tone DRUs may contain the following subcarriers:

[0211] 26-tone DRU-1: -252, -225, -196, -169, -141, -113, -86, -57, -30, 22, 49, 78, 105, 133, 161, 188, 217, 244, 278, 305, 334, 361, 389, 417, 444, 473

[0212] 26-tone DRU-2: -251, -224, -195, -168, -140, -112, -85, -56, -29, 23, 50, 79, 106, 134, 162, 189, 218, 245, 279, 306, 335, 362, 390, 418, 445, 474

[0213] 26-tone DRU-3: -250, -223, -194, -167, -139, -111, -84, -55, -28, 24, 51, 80, 107, 135, 163, 190, 219, 246, 280, 307, 336, 363, 391, 419, 448, 475

[0214] 26-tone DRU-4: -249, -222, -193, -166, -138, -110, -83, -54, -27, 25, 52, 81, 108, 136, 164, 191, 220, 247, 281, 308, 337, 364, 392, 420, 449, 476

[0215] 26-tone DRU-5: -248, -221, -192, -165, -137, -109, -82, -53, -26, 26, 53, 82, 109, 137, 165, 192, 221, 248, 282, 309, 338, 365, 394, 421, 450, 477

[0216] 26-tone DRU-6: -247, -220, -191, -164, -136, -108, -81, -52, -25, 27, 54, 83, 110, 138, 166, 193, 222, 249, 283, 310, 339, 367, 395, 422, 451, 478

[0217] 26-tone DRU-7: -246, -219, -190, -163, -135, -107, -80, -51, -24, 28, 55, 84, 111, 139, 167, 194, 223, 250, 284, 311, 340, 368, 396, 423, 452, 479

[0218] 26-tone DRU-8: -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, 480

[0219] 26-tone DRU-9: -244, -217, -188, -161, -133, -105, -78, -49, -22, 30, 57, 86, 113, 141, 169, 196, 225, 252, 286, 315, 342, 370, 398, 425, 454, 481

[0220] 26-tone DRU-10: -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, 170, 197, 226, 260, 287, 316, 343, 371, 399, 426, 455, 482

[0221] 26-tone DRU-11: -242, -215, -186, -159, -131, -103, -76, -47, -20, 32, 59, 88, 115, 143, 171, 198, 227, 261, 288, 317, 344, 372, 400, 427, 456, 483

[0222] 26-tone DRU-12: -241, -214, -185, -158, -130, -102, -75, -46, -19, 33, 60, 89, 116, 144, 172, 201, 228, 262, 289, 318, 345, 373, 401, 428, 457, 484

[0223] 26-tone DRU-13: -240, -213, -184, -157, -129, -101, -74, -45, -18, 34, 61, 90, 117, 145, 173, 202, 229, 263, 290, 319, 346, 374, 402, 429, 458, 485

[0224] 26-tone DRU-14: -239, -212, -183, -156, -128, -100, -73, -44, -17, 35, 62, 91, 118, 147, 174, 203, 230, 264, 291, 320, 347, 375, 403, 430, 459, 486

[0225] 26-tone DRU-15: -238, -211, -182, -155, -127, -99, -72, -43, -16, 36, 63, 92, 120, 148, 175, 204, 231, 265, 292, 321, 348, 376, 404, 431, 460, 487

[0226] 26-tone DRU-16: -237, -210, -181, -154, -126, -98, -71, -42, -15, 37, 64, 93, 121, 149, 176, 205, 232, 266, 293, 322, 349, 377, 405, 432, 461, 488

[0227] 26-tone DRU-17: -236, -209, -180, -153, -125, -97, -70, -41, -14, 38, 67, 94, 122, 150, 177, 206, 233, 267, 294, 323, 350, 378, 406, 433, 462, 489

[0228] 26-tone DRU-18: -235, -208, -179, -152, -124, -96, -69, -40, -13, 39, 68, 95, 123, 151, 178, 207, 234, 268, 295, 324, 351, 379, 407, 434, 463, 490

[0229] 26-tone DRU-19: -234, -207, -178, -151, -123, -95, -68, -39, 13, 40, 69, 96, 124, 152, 179, 208, 235, 269, 296, 325, 352, 380, 408, 435, 464, 491

[0230] 26-tone DRU-20: -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, 236, 270, 297, 326, 353, 381, 409, 436, 465, 492

[0231] 26-tone DRU-21: -232, -205, -176, -149, -121, -93, -64, -37, 15, 42, 71, 98, 126, 154, 181, 210, 237, 271, 298, 327, 354, 382, ​​410, 437, 466, 493

[0232] 26-tone DRU-22: -231, -204, -175, -148, -120, -92, -63, -36, 16, 43, 72, 99, 127, 155, 182, 211, 238, 272, 299, 328, 355, 383, 411, 438, 467, 494

[0233] 26-tone DRU-23: -230, -203, -174, -147, -118, -91, -62, -35, 17, 44, 73, 100, 128, 156, 183, 212, 239, 273, 300, 329, 356, 384, 412, 439, 468, 495

[0234] 26-tone DRU-24: -229, -202, -173, -145, -117, -90, -61, -34, 18, 45, 74, 101, 129, 157, 184, 213, 240, 274, 301, 330, 357, 385, 413, 440, 469, 496

[0235] 26-tone DRU-25: -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, 241, 275, 302, 331, 358, 386, 414, 441, 470, 497

[0236] 26-tone DRU-26: -227, -198, -171, -143, -115, -88, -59, -32, 20, 47, 76, 103, 131, 159, 186, 215, 242, 276, 303, 332, 359, 387, 415, 442, 471, 498

[0237] 26-tone DRU-27: -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, 132, 160, 187, 216, 243, 277, 304, 333, 360, 388, 416, 443, 472, 499

[0238] Examples 1-2

[0239] This embodiment relates to a method for assigning one subcarrier to each of 27 26-tone DRUs sequentially from the lowest available subcarrier to the highest available subcarrier when preamble puncturing is applied to the second 20MHz channel (i.e., the second lowest 20MHz channel) of four 20MHz channels in a bandwidth including an 80MHz channel. For example, each of the 27 26-tone DRUs may contain the following subcarriers:

[0240] 26-tone DRU-1: -499, -472, -443, -416, -388, -360, -333, -304, -277, 22, 49, 78, 105, 133, 161, 188, 217, 244, 278, 305, 334, 361, 389, 417, 444, 473

[0241] 26-tone DRU-2: -498, -471, -442, -415, -387, -359, -332, -303, -276, 23, 50, 79, 106, 134, 162, 189, 218, 245, 279, 306, 335, 362, 390, 418, 445, 474

[0242] 26-tone DRU-3: -497, -470, -441, -414, -386, -358, -331, -302, -275, 24, 51, 80, 107, 135, 163, 190, 219, 246, 280, 307, 336, 363, 391, 419, 448, 475

[0243] 26-tone DRU-4: -496, -469, -440, -413, -385, -357, -330, -301, -274, 25, 52, 81, 108, 136, 164, 191, 220, 247, 281, 308, 337, 364, 392, 420, 449, 476

[0244] 26-tone DRU-5: -495, -468, -439, -412, -384, -356, -329, -300, -273, 26, 53, 82, 109, 137, 165, 192, 221, 248, 282, 309, 338, 365, 394, 421, 450, 477

[0245] 26-tone DRU-6: -494, -467, -438, -411, -383, -355, -328, -299, -272, 27, 54, 83, 110, 138, 166, 193, 222, 249, 283, 310, 339, 367, 395, 422, 451, 478

[0246] 26-tone DRU-7: -493, -466, -437, -410, -382, -354, -327, -298, -271, 28, 55, 84, 111, 139, 167, 194, 223, 250, 284, 311, 340, 368, 396, 423, 452, 479

[0247] 26-tone DRU-8: -492, -465, -436, -409, -381, -353, -326, -297, -270, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, 480

[0248] 26-tone DRU-9: -491, -464, -435, -408, -380, -352, -325, -296, -269, 30, 57, 86, 113, 141, 169, 196, 225, 252, 286, 315, 342, 370, 398, 425, 454, 481

[0249] 26-tone DRU-10: -490, -463, -434, -407, -379, -351, -324, -295, -268, 31, 58, 87, 114, 142, 170, 197, 226, 260, 287, 316, 343, 371, 399, 426, 455, 482

[0250] 26-tone DRU-11: -489, -462, -433, -406, -378, -350, -323, -294, -267, 32, 59, 88, 115, 143, 171, 198, 227, 261, 288, 317, 344, 372, 400, 427, 456, 483

[0251] 26-tone DRU-12: -488, -461, -432, -405, -377, -349, -322, -293, -266, 33, 60, 89, 116, 144, 172, 201, 228, 262, 289, 318, 345, 373, 401, 428, 457, 484

[0252] 26-tone DRU-13: -487, -460, -431, -404, -376, -348, -321, -292, -265, 34, 61, 90, 117, 145, 173, 202, 229, 263, 290, 319, 346, 374, 402, 429, 458, 485

[0253] 26-tone DRU-14: -486, -459, -430, -403, -375, -347, -320, -291, -264, 35, 62, 91, 118, 147, 174, 203, 230, 264, 291, 320, 347, 375, 403, 430, 459, 486

[0254] 26-tone DRU-15: -485, -458, -429, -402, -374, -346, -319, -290, -263, 36, 63, 92, 120, 148, 175, 204, 231, 265, 292, 321, 348, 376, 404, 431, 460, 487

[0255] 26-tone DRU-16: -484, -457, -428, -401, -373, -345, -318, -289, -262, 37, 64, 93, 121, 149, 176, 205, 232, 266, 293, 322, 349, 377, 405, 432, 461, 488

[0256] 26-tone DRU-17: -483, -456, -427, -400, -372, -344, -317, -288, -261, 38, 67, 94, 122, 150, 177, 206, 233, 267, 294, 323, 350, 378, 406, 433, 462, 489

[0257] 26-tone DRU-18: -482, -455, -426, -399, -371, -343, -316, -287, -260, 39, 68, 95, 123, 151, 178, 207, 234, 268, 295, 324, 351, 379, 407, 434, 463, 490

[0258] 26-tone DRU-19: -481, -454, -425, -398, -370, -342, -315, -286, 13, 40, 69, 96, 124, 152, 179, 208, 235, 269, 296, 325, 352, 380, 408, 435, 464, 491

[0259] 26-tone DRU-20: -480, -453, -424, -397, -369, -341, -314, -285, 14, 41, 70, 97, 125, 153, 180, 209, 236, 270, 297, 326, 353, 381, 409, 436, 465, 492

[0260] 26-tone DRU-21: -479, -452, -423, -396, -368, -340, -311, -284, 15, 42, 71, 98, 126, 154, 181, 210, 237, 271, 298, 327, 354, 382, ​​410, 437, 466, 493

[0261] 26-tone DRU-22: -478, -451, -422, -395, -367, -339, -310, -283, 16, 43, 72, 99, 127, 155, 182, 211, 238, 272, 299, 328, 355, 383, 411, 438, 467, 494

[0262] 26-tone DRU-23: -477, -450, -421, -394, -365, -338, -309, -282, 17, 44, 73, 100, 128, 156, 183, 212, 239, 273, 300, 329, 356, 384, 412, 439, 468, 495

[0263] 26-tone DRU-24: -476, -449, -420, -392, -364, -337, -308, -281, 18, 45, 74, 101, 129, 157, 184, 213, 240, 274, 301, 330, 357, 385, 413, 440, 469, 496

[0264] 26-tone DRU-25: -475, -448, -419, -391, -363, -336, -307, -280, 19, 46, 75, 102, 130, 158, 185, 214, 241, 275, 302, 331, 358, 386, 414, 441, 470, 497

[0265] 26-tone DRU-26: -474, -445, -418, -390, -362, -335, -306, -279, 20, 47, 76, 103, 131, 159, 186, 215, 242, 276, 303, 332, 359, 387, 415, 442, 471, 498

[0266] 26-tone DRU-27: -473, -444, -417, -389, -361, -334, -305, -278, 21, 48, 77, 104, 132, 160, 187, 216, 243, 277, 304, 333, 360, 388, 416, 443, 472, 499

[0267] Examples 1-3

[0268] This embodiment relates to a method for assigning one subcarrier to each of 27 26-tone DRUs sequentially from the lowest available subcarrier to the highest available subcarrier when preamble puncturing is applied to the third 20MHz channel (i.e., the third highest 20MHz channel) among four 20MHz channels in a bandwidth including an 80MHz channel. For example, each of the 27 26-tone DRUs may contain the following subcarriers:

[0269] 26-tone DRU-1: -499, -472, -443, -416, -388, -360, -333, -304, -277, -243, -216, -187, -160, -132, -104, -77, -48, -21, 278, 305, 334, 361, 389, 417, 444, 473

[0270] 26-tone DRU-2: -498, -471, -442, -415, -387, -359, -332, -303, -276, -242, -215, -186, -159, -131, -103, -76, -47, -20, 279, 306, 335, 362, 390, 418, 445, 474

[0271] 26-tone DRU-3: -497, -470, -441, -414, -386, -358, -331, -302, -275, -241, -214, -185, -158, -130, -102, -75, -46, -19, 280, 307, 336, 363, 391, 419, 448, 475

[0272] 26-tone DRU-4: -496, -469, -440, -413, -385, -357, -330, -301, -274, -240, -213, -184, -157, -129, -101, -74, -45, -18, 281, 308, 337, 364, 392, 420, 449, 476

[0273] 26-tone DRU-5: -495, -468, -439, -412, -384, -356, -329, -300, -273, -239, -212, -183, -156, -128, -100, -73, -44, -17, 282, 309, 338, 365, 394, 421, 450, 477

[0274] 26-tone DRU-6: -494, -467, -438, -411, -383, -355, -328, -299, -272, -238, -211, -182, -155, -127, -99, -72, -43, -16, 283, 310, 339, 367, 395, 422, 451, 478

[0275] 26-tone DRU-7: -493, -466, -437, -410, -382, -354, -327, -298, -271, -237, -210, -181, -154, -126, -98, -71, -42, -15, 284, 311, 340, 368, 396, 423, 452, 479

[0276] 26-tone DRU-8: -492, -465, -436, -409, -381, -353, -326, -297, -270, -236, -209, -180, -153, -125, -97, -70, -41, -14, 285, 314, 341, 369, 397, 424, 453, 480

[0277] 26-tone DRU-9: -491, -464, -435, -408, -380, -352, -325, -296, -269, -235, -208, -179, -152, -124, -96, -69, -40, -13, 286, 315, 342, 370, 398, 425, 454, 481

[0278] 26-tone DRU-10: -490, -463, -434, -407, -379, -351, -324, -295, -268, -234, -207, -178, -151, -123, -95, -68, -39, 260, 287, 316, 343, 371, 399, 426, 455, 482

[0279] 26 - tone DRU - 11: - 489, - 462, - 433, - 406, - 378, - 350, - 323, - 294, - 267, - 233, - 206, - 177, - 150, - 122, - 94, - 67, - 38, 261, 288, 317, 344, 372, 400, 427, 456, 483

[0280] 26 - tone DRU - 12: - 488, - 461, - 432, - 405, - 377, - 349, - 322, - 293, - 266, - 232, - 205, - 176, - 149, - 121, - 93, - 64, - 37, 262, 289, 318, 345, 373, 401, 428, 457, 484

[0281] 26 - tone DRU - 13: - 487, - 460, - 431, - 404, - 376, - 348, - 321, - 292, - 265, - 231, - 204, - 175, - 148, - 120, - 92, - 63, - 36, 263, 290, 319, 346, 374, 402, 429, 458, 485

[0282] 26 - tone DRU - 行14: - 486, - 459, - 430, - 403, - 375, - 347, - 320, - 291, - 264, - 230, - 203, - 174, - 147, - 118, - 91, - 62, - 35, 264, 291, 320, 347, 375, 403, 430, 459, 486

[0283] 26 - tone DRU - 15: - 485, - 458, - 429, - 402, - 374, - 346, - 319, - 290, - 263, - 229, - 202, - 173, - 145, - 117, - 90, - 61, - 34, 265, 292, 321, 348, 376, 404, 431, 460, 487

[0284] 26 - tone DRU - 16: - 484, - 457, - 428, - 401, - 373, - 345, - 318, - 289, - 262, - 228, - 201, - 172, - 144, - 116, - 89, - 60, - 33, 266, 293, 322, 349, 377, 405, 432, 461, 488

[0285] 26-tone DRU-17: -483, -456, -427, -400, -372, -344, -317, -288, -261, -227, -198, -171, -143, -115, -88, -59, -32, 267, 294, 323, 350, 378, 406, 433, 462, 489

[0286] 26-tone DRU-18: -482, -455, -426, -399, -371, -343, -316, -287, -260, -226, -197, -170, -142, -114, -87, -58, -31, 268, 295, 324, 351, 379, 407, 434, 463, 490

[0287] 26-tone DRU-19: -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, 269, 296, 325, 352, 380, 408, 435, 464, 491

[0288] 26-tone DRU-20: -480, -453, -424, -397, -369, -341, -314, -285, -251, -224, -195, -168, -140, -112, -85, -56, -29, 270, 297, 326, 353, 381, 409, 436, 465, 492

[0289] 26-tone DRU-21: -479, -452, -423, -396, -368, -340, -311, -284, -250, -223, -194, -167, -139, -111, -84, -55, -28, 271, 298, 327, 354, 382, ​​410, 437, 466, 493

[0290] 26-tone DRU-22: -478, -451, -422, -395, -367, -339, -310, -283, -249, -222, -193, -166, -138, -110, -83, -54, -27, 272, 299, 328, 355, 383, 411, 438, 467, 494

[0291] 26-tone DRU-23: -477, -450, -421, -394, -365, -338, -309, -282, -248, -221, -192, -165, -137, -109, -82, -53, -26, 273, 300, 329, 356, 384, 412, 439, 468, 495

[0292] 26-tone DRU-24: -476, -449, -420, -392, -364, -337, -308, -281, -247, -220, -191, -164, -136, -108, -81, -52, -25, 274, 301, 330, 357, 385, 413, 440, 469, 496

[0293] 26-tone DRU-25: -475, -448, -419, -391, -363, -336, -307, -280, -246, -219, -190, -163, -135, -107, -80, -51, -24, 275, 302, 331, 358, 386, 414, 441, 470, 497

[0294] 26-tone DRU-26: -474, -445, -418, -390, -362, -335, -306, -279, -245, -218, -189, -162, -134, -106, -79, -50, -23, 276, 303, 332, 359, 387, 415, 442, 471, 498

[0295] 26-tone DRU-27: -473, -444, -417, -389, -361, -334, -305, -278, -244, -217, -188, -161, -133, -105, -78, -49, -22, 277, 304, 333, 360, 388, 416, 443, 472, 499

[0296] Examples 1-4

[0297] This embodiment relates to a method for assigning one subcarrier to each of 27 26-tone DRUs sequentially from the lowest available subcarrier to the highest available subcarrier when preamble puncturing is applied to the fourth 20MHz channel (i.e., the highest 20MHz channel) of four 20MHz channels in a bandwidth including an 80MHz channel. For example, each of the 27 26-tone DRUs may contain the following subcarriers:

[0298] 26-tone DRU-1: -499, -472, -443, -416, -388, -360, -333, -304, -277, -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, 170, 197, 226

[0299] 26-tone DRU-2: -498, -471, -442, -415, -387, -359, -332, -303, -276, -242, -215, -186, -159, -131, -103, -76, -47, -20, 32, 59, 88, 115, 143, 171, 198, 227

[0300] 26-tone DRU-3: -497, -470, -441, -414, -386, -358, -331, -302, -275, -241, -214, -185, -158, -130, -102, -75, -46, -19, 33, 60, 89, 116, 144, 172, 201, 228

[0301] 26-tone DRU-4: -496, -469, -440, -413, -385, -357, -330, -301, -274, -240, -213, -184, -157, -129, -101, -74, -45, -18, 34, 61, 90, 117, 145, 173, 202, 229

[0302] 26 - tone DRU - 5: - 495, - 468, - 439, - 412, - 384, - 356, - 329, - 300, - 273, - 239, - 212, - 183, - 156, - 128, - 100, - 73, - 44, - 17, 35, 62, 91, 118, 147, 174, 203, 230

[0303] 26 - tone DRU - 6: - 494, - 467, - 438, - 411, - 383, - 355, - 328, - 299, - 272, - 238, - 211, - 182, - 155, - 127, - 99, - 72, - 43, - 16, 36, 63, 92, 120, 148, 175, 204, 231

[0304] 26 - tone DRU - 7: - 493, - 466, - 437, - 410, - 382, - 354, - 327, - 298, - 271, - 237, - 210, - 181, - 154, - 126, - 98, - 71, - 42, - 15, 37, 64, 93, 121, 149, 176, 205, 232

[0305] 26 - tone DRU - 8: - 492, - 465, - 436, - 409, - 381, - 353, - 326, - 297, - 270, - 236, - 209, - 180, - 153, - 125, - 97, - 70, - 41, - 14, 38, 67, 94, 122, 150, 177, 206, 233

[0306] 26 - tone DRU - 9: - 491, - 464, - 435, - 408, - 380, - 352, - 325, - 296, - 269, - 235, - 208, - 179, - 152, - 124, - 96, - 69, - 40, - 13, 39, 68, 95, 123, 151, 178, 207, 234

[0307] 26 - tone DRU - 10: - 490, - 463, - 434, - 407, - 379, - 351, - 324, - 295, - 268, - 234, - 207, - 178, - 151, - 123, - 95, - 68, - 39, 13, 40, 69, 96, 124, 152, 179, 208, 235

[0308] 26-tone DRU-11: -489, -462, -433, -406, -378, -350, -323, -294, -267, -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, 236

[0309] 26-tone DRU-12: -488, -461, -432, -405, -377, -349, -322, -293, -266, -232, -205, -176, -149, -121, -93, -64, -37, 15, 42, 71, 98, 126, 154, 181, 210, 237

[0310] 26-tone DRU-13: -487, -460, -431, -404, -376, -348, -321, -292, -265, -231, -204, -175, -148, -120, -92, -63, -36, 16, 43, 72, 99, 127, 155, 182, 211, 238

[0311] 26-tone DRU-14: -486, -459, -430, -403, -375, -347, -320, -291, -264, -230, -203, -174, -147, -118, -91, -62, -35, 17, 44, 73, 100, 128, 156, 183, 212, 239

[0312] 26-tone DRU-15: -485, -458, -429, -402, -374, -346, -319, -290, -263, -229, -202, -173, -145, -117, -90, -61, -34, 18, 45, 74, 101, 129, 157, 184, 213, 240

[0313] 26-tone DRU-16: -484, -457, -428, -401, -373, -345, -318, -289, -262, -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, 241

[0314] 26-tone DRU-17: -483, -456, -427, -400, -372, -344, -317, -288, -261, -227, -198, -171, -143, -115, -88, -59, -32, 20, 47, 76, 103, 131, 159, 186, 215, 242

[0315] 26-tone DRU-18: -482, -455, -426, -399, -371, -343, -316, -287, -260, -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, 132, 160, 187, 216, 243

[0316] 26-tone DRU-19: -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, 22, 49, 78, 105, 133, 161, 188, 217, 244

[0317] 26-tone DRU-20: -480, -453, -424, -397, -369, -341, -314, -285, -251, -224, -195, -168, -140, -112, -85, -56, -29, 23, 50, 79, 106, 134, 162, 189, 218, 245

[0318] 26-tone DRU-21: -479, -452, -423, -396, -368, -340, -311, -284, -250, -223, -194, -167, -139, -111, -84, -55, -28, 24, 51, 80, 107, 135, 163, 190, 219, 246

[0319] 26-tone DRU-22: -478, -451, -422, -395, -367, -339, -310, -283, -249, -222, -193, -166, -138, -110, -83, -54, -27, 25, 52, 81, 108, 136, 164, 191, 220, 247

[0320] 26-tone DRU-23: -477, -450, -421, -394, -365, -338, -309, -282, -248, -221, -192, -165, -137, -109, -82, -53, -26, 26, 53, 82, 109, 137, 165, 192, 221, 248

[0321] 26-tone DRU-24: -476, -449, -420, -392, -364, -337, -308, -281, -247, -220, -191, -164, -136, -108, -81, -52, -25, 27, 54, 83, 110, 138, 166, 193, 222, 249

[0322] 26-tone DRU-25: -475, -448, -419, -391, -363, -336, -307, -280, -246, -219, -190, -163, -135, -107, -80, -51, -24, 28, 55, 84, 111, 139, 167, 194, 223, 250

[0323] 26-tone DRU-26: -474, -445, -418, -390, -362, -335, -306, -279, -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, 251

[0324] 26-tone DRU-27: -473, -444, -417, -389, -361, -334, -305, -278, -244, -217, -188, -161, -133, -105, -78, -49, -22, 30, 57, 86, 113, 141, 169, 196, 225, 252

[0325] In the example mentioned above, the spacing between subcarriers is kept constant within each DRU, making it easy to apply interpolation techniques and thus advantageous in terms of channel estimation performance.

[0326] In addition to the subcarrier indices included in the 26-tone DRU as exemplified above, subcarrier indices may be assigned to the 26-tone DRU in other ways. For example, while the above example assumes that available subcarriers exclude guard, null, and DC subcarriers, it is also possible to define the subcarrier indices included in each 26-tone DRU assuming that the available subcarriers include one or more of the guard, null, or DC subcarriers.

[0327] As an addition or alternative, a 26-tone DRU including the subcarrier index as illustrated above may be applied to the first bandwidth and / or the first BSS color, and a 26-tone DRU including a subcarrier index of another type may be applied to the second bandwidth and / or the second BSS color.

[0328] Example 2

[0329] In this embodiment, various examples of subcarrier indices constituting a 52-tone DRU are described.

[0330] For example, if preamble puncturing is applied to one of four 20MHz channels within an 80MHz bandwidth, then twelve 52-tone DRUs may be defined within the remaining continuous / discontinuous 60MHz channels, and one 52-tone DRU may correspond to a combination of two 26-tone DRUs. For example, two 26-tone DRUs may correspond to any two of the 27 26-tone DRUs defined in the above-described embodiment 1. If 26-tone DRU-5, 26-tone DRU-14, and 26-tone DRU-23 are not used as the basis for a 52-tone DRU, then a combination of any two of the 24 26-tone DRUs may correspond to one 52-tone DRU.

[0331] Two 26-tone DRUs corresponding to one 52-tone DRU may be intended to ensure that subcarriers are uniformly distributed across the 52-tone DRU while being as far apart as possible in the frequency domain. The twelve 52-tone DRUs may be defined as follows:

[0332] 52-tone DRU-1: 26-tone DRU-1, and 26-tone DRU-15

[0333] 52-tone DRU-2: 26-tone DRU-2, and 26-tone DRU-16

[0334] 52-tone DRU-3: 26-tone DRU-3, and 26-tone DRU-17

[0335] 52-tone DRU-4: 26-tone DRU-4, and 26-tone DRU-18

[0336] 52-tone DRU-5, 26-tone DRU-6, and 26-tone DRU-19

[0337] 52-tone DRU-6, 26-tone DRU-7, and 26-tone DRU-20

[0338] 52-tone DRU-7, 26-tone DRU-8, and 26-tone DRU-21

[0339] 52-tone DRU-8, 26-tone DRU-9, and 26-tone DRU-22

[0340] 52-tone DRU-9, 26-tone DRU-10, and 26-tone DRU-24

[0341] 52-tone DRU-10, 26-tone DRU-11, and 26-tone DRU-25

[0342] 52-tone DRU-11, 26-tone DRU-12, and 26-tone DRU-26

[0343] 52-tone DRU-12, 26-tone DRU-13, and 26-tone DRU-27

[0344] Here, each 52-tone DRU may be defined as a set of subcarrier indices corresponding to the 26-tone DRU index defined in Example 1.

[0345] Example 3

[0346] In this embodiment, various examples of subcarrier indices constituting a 106-tone DRU are described.

[0347] For example, if preamble puncturing is applied to one of four 20MHz channels within an 80MHz bandwidth, six 106-tone DRUs may be defined within the remaining continuous / discontinuous 60MHz channels. The subcarrier indices contained in one 106-tone DRU may correspond to the set of subcarrier indices contained in two 52-tone DRUs and two further subcarrier indices. Furthermore, the subcarriers contained in each 106-tone DRU may be defined to be as dispersed as possible.

[0348] The two additional subcarriers included in the 106-tone DRU may be two of the remaining 12 subcarriers from the 16 null subcarriers (e.g., ±{447, 446, 313, 312, 200, 199, 66, 65}) out of the 42 null subcarriers not used in the 26-tone and 52-tone DRUs, excluding the four null subcarriers corresponding to the one punctured 20MHz channel. In other words, some of the null subcarriers in the 26-tone and 52-tone DRUs may be included in the available subcarriers for the 106-tone DRU. Furthermore, the two additional subcarrier indices included in two different 106-tone DRUs do not need to overlap.

[0349] For example, if 26-tone DRUs corresponding to 52-tone DRUs are defined by Example 1, then six 106-tone DRUs may be defined as follows:

[0350] 106-tone DRU-1: 52-tone DRU-1, 52-tone DRU-7, and null subcarriers of the first group

[0351] 106-tone DRU-2: 52-tone DRU-2, 52-tone DRU-8, and null subcarriers of the second group.

[0352] 106-tone DRU-3: 52-tone DRU-3, 52-tone DRU-9, and subcarrier indices of the third group

[0353] 106-tone DRU-4: 52-tone DRU-4, 52-tone DRU-10, and null subcarriers of the 4th group.

[0354] 106-tone DRU-5: 52-tone DRU-5, 52-tone DRU-11, and null subcarriers of the 5th group.

[0355] 106-tone DRU-6: 52-tone DRU-6, 52-tone DRU-12, and null subcarriers of the 6th group.

[0356] For example, two combinations of null subcarriers may be selected from the 12 null subcarriers such that they do not overlap in different 106-tone DRUs. For example, if we refer to the remaining 12 subcarriers out of 16 null subcarriers (e.g., ±{447, 446, 313, 312, 200, 199, 66, 65}) as the 1st to 12th null subcarriers, then one of the null subcarriers from the 1st to 6th groups included in the 106-tone DRU may include the 1st and 7th null subcarriers, another may include the 2nd and 8th null subcarriers, yet another may include the 3rd and 9th null subcarriers, yet another may include the 4th and 10th null subcarriers, yet another may include the 5th and 11th null subcarriers, and yet another may include the 6th and 12th null subcarriers.

[0357] As an addition or alternative, assuming that mapping relationships between existing RRU indices and newly defined DRU indices are predefined, if a 106-tone RRU index contains additional subcarrier indices (i.e., null subcarriers in 26-tone RRU / DRU or 52-tone RRU / DRU), then the 106-tone DRU index mapped to that 106-tone RRU index may be defined as containing the same additional subcarrier indices.

[0358] Example 4

[0359] In this embodiment, various examples of subcarrier indices constituting a 242-tone DRU are described.

[0360] For example, if preamble puncturing is applied to one of four 20MHz channels within an 80MHz bandwidth, three 242-tone DRUs may be defined within the remaining continuous / discontinuous 60MHz channels. The subcarrier indices contained in one 242-tone DRU may correspond to the subcarrier indices contained in two 106-tone DRUs, the subcarrier indices contained in one 26-tone DRU, and the set of four further subcarrier indices. The one 26-tone DRU contained in one 242-tone DRU may correspond to one of the three 26-tone DRUs (i.e., 26-tone DRU-5, 26-tone DRU-14, and 26-tone DRU-23) out of the 27 26-tone DRUs that are not used in combinations of other larger-sized DRUs. Furthermore, the subcarriers contained in each 242-tone DRU may be defined to be as dispersed as possible.

[0361] For example, the four additional subcarriers included in a 242-tone DRU may be any four of the 12 subcarriers remaining from the 16 null subcarriers (e.g., ±{500, 393, 366, 259, 253, 146, 119, 12}) that are not commonly used in the 26-tone DRU, 52-tone DRU, and 106-tone DRU, excluding the four null subcarriers corresponding to the single 20MHz channel that is punctured. That is, some of the null subcarriers in the 26-tone DRU and 52-tone DRU, or some of the null subcarriers in the 106-tone DRU, may be included in the available subcarriers for the 242-tone DRU. Furthermore, the four additional subcarrier indices included in different 242-tone DRUs do not need to overlap.

[0362] For example, if a 26-tone DRU corresponding to a 106-tone DRU (or a 52-tone DRU corresponding to a 106-tone DRU) is defined by Example 1, then three 242-tone DRUs may be defined as follows:

[0363] 242-tone DRU-1: 106-tone DRU-1, 106-tone DRU-4, 26-tone DRU-5, and null subcarriers of the 7th group.

[0364] 242-tone DRU-2: 106-tone DRU-2, 106-tone DRU-5, 26-tone DRU-14, and null subcarriers of the 8th group.

[0365] 242-tone DRU-3: 106-tone DRU-3, 106-tone DRU-6, 26-tone DRU-23, and null subcarriers of the 9th group.

[0366] For example, any combination of any three of the twelve null subcarriers may be selected so as not to overlap in different 242-tone DRUs. For example, if of the sixteen null subcarriers (e.g., ±{500, 393, 366, 259, 253, 146, 119, 12}), the remaining 12 subcarriers, excluding the four null subcarriers corresponding to the one 20MHz channel to be punctured, are designated as the 13th to 24th null subcarriers, then one of the null subcarriers from groups 7 to 9 included in the 242-tone DRU may include the 13th, 16th, 19th, and 22nd null subcarriers, another may include the 14th, 17th, 20th, and 23rd null subcarriers, and yet another may include the 15th, 18th, 21st, and 24th null subcarriers.

[0367] As an addition or alternative, assuming that mapping relationships between existing RRU indices and newly defined DRU indices are predefined, if a 242-tone RRU index contains additional subcarrier indices (i.e., null subcarriers in 26-tone RRU / DRU, 52-tone RRU / DRU, or 106-tone RRU / DRU), then the 242-tone DRU index mapped to that 242-tone RRU index may be defined as containing the same additional subcarrier indices.

[0368] Example 5

[0369] In this embodiment, various examples of subcarrier indices constituting a 484-tone DRU are described.

[0370] For example, if preamble puncturing is applied to one of four 20MHz channels within an 80MHz bandwidth, one 484-tone DRU may be defined within the remaining continuous / discontinuous 60MHz channels. The subcarrier indices contained in one 484-tone DRU may correspond to the set of subcarrier indices contained in two 242-tone DRUs.

[0371] 484-tone DRU-1:242-tone DRU-1, and 242-tone DRU-2, or

[0372] 484-tone DRU-1:242-tone DRU-1, and 242-tone DRU-3, or

[0373] 484-tone DRU-1: 242-tone DRU-2, and 242-tone DRU-3

[0374] Assuming that each 242-tone DRU is mapped to each 242-tone RRU in frequency order (i.e., in the case of RRUs, defining the mapping relationship between the 242-tone DRU index and the 484-tone DRU index in the same way as the mapping relationship between the 242-tone RRU index and the 484-tone RRU index when one 20MHz channel in an 80MHz channel is punctured), then in the situation where the first or second 20MHz channel is punctured, the 484-tone DRU-1 may be defined as a combination of 242-tone DRU-2 and 242-tone DRU-3, and in the situation where the third or fourth 20MHz channel is punctured, the 484-tone DRU-1 may be defined as a combination of 242-tone DRU-1 and 242-tone DRU-2.

[0375] In accordance with the DRU tone plan defined in the various examples of this disclosure described above, identical / differently sized DRUs can be assigned to different STAs.

[0376] For example, in DL OFDMA transmission, if a specific RU index is indicated in the RU assignment field included in the SIG (e.g., U-SIG and / or UHR-SIG) field, the STA receiving the PPDU can parse it as the data fields within the PPDU being mapped onto subcarriers included in the DRU corresponding to the indicated RU index, and thereby decode the data fields. Alternatively, if a specific RU index is indicated in the RU assignment subfield in the trigger frame, the STA receiving the trigger frame can transmit a TB PPDU with the data fields mapped onto subcarriers included in the DRU corresponding to the indicated RU index. Here, the DRU corresponding to the indicated RU index may be determined based on mapping rules between RRUs and DRUs.

[0377] Example 6

[0378] Instead of pre-defining the 52-tone DRU in Example 2 above to contain a fixed combination of two 26-tone DRU subcarriers, a method can be applied to dynamically signal the 52-tone DRU to contain any combination of two 26-tone DRU subcarriers. Here, the 26-tone DRU may be defined in Example 1 or by other methods.

[0379] As an addition or alternative, instead of pre-defining that the 106-tone DRU in Example 3 contains a fixed combination of two 52-tone DRUs (or a fixed combination of four 26-tone DRUs) subcarriers, a method can be applied to dynamically signal the 106-tone DRU to contain any combination of two 52-tone DRUs (or a fixed combination of four 26-tone DRUs) subcarriers. Here, the 26-tone DRU / 52-tone DRU may be defined in Examples 1 / 2 or by other methods. Furthermore, the combination of two additional subcarriers included in the 106-tone DRU may be defined as described in Example 3.

[0380] As an addition or alternative, instead of pre-defining the 242-tone DRU in Example 4 above as containing a fixed combination of two 106-tone DRUs (or a fixed combination of four 52-tone DRUs, or a fixed combination of eight 26-tone DRUs) and an additional subcarrier of one 26-tone DRU, a method can be applied to dynamically signal the 242-tone DRU to contain any combination of two 106-tone DRUs (or a fixed combination of four 52-tone DRUs, or an arbitrary combination of eight 26-tone DRUs) and an additional subcarrier of one 26-tone DRU. Here, the 26-tone DRU / 52-tone DRU / 106-tone DRU may be those defined in Examples 1 / 2 / 3 or defined in other ways. Furthermore, when the 242-tone DRU contains two 106-tone DRUs and one 26-tone DRU subcarrier, the combination of four additional subcarriers included in the 242-tone DRU may be defined as described in Example 4.

[0381] As an addition or alternative, if the 242-tone DRU includes four 52-tone DRUs and one 26-tone DRU subcarrier, or nine 26-tone DRU subcarriers, the combination of eight additional subcarriers included in the 242-tone DRU may include a first set of four additional subcarriers and a second set of four additional subcarriers. For example, the first four additional subcarriers may be any four of the twelve subcarriers from ±{447, 446, 313, 312, 200, 199, 66, 65}, excluding the four subcarriers included in the one 20MHz channel that is punctured (for example, if the twelve additional subcarriers are designated as the first to twelfth additional subcarriers in order, then combinations of the first, fourth, seventh, and tenth additional subcarriers, or combinations of the second, fifth, eighth, and eleventh additional subcarriers, and combinations of the third, sixth, ninth, and twelfth additional subcarriers may be assigned to 242-tone DRU-1, 242-tone DRU-2, and 242-tone DRU-3, respectively). Next, the second set of four additional subcarriers may be any four of the 12 subcarriers from ±{500, 393, 366, 259, 253, 146, 119, 12}, excluding the four subcarriers included in the one 20MHz channel that is punctured (for example, if the 12 additional subcarriers are designated as the 13th to 24th null subcarriers in order, then the combination of the 13th, 16th, 19th, and 22nd additional subcarriers, or the combination of the 14th, 17th, 20th, and 23rd additional subcarriers, and the combination of the 15th, 18th, 21st, and 24th additional subcarriers may be assigned to 242-tone DRU-1, 242-tone DRU-2, and 242-tone DRU-3, respectively).

[0382] As an addition or alternative, instead of pre-defining that the 484-tone DRU in Example 5 above contains subcarriers of two 242-tone DRUs in a fixed combination (or four 106-tone DRUs and two 26-tone DRUs in a fixed combination, or eight 52-tone DRUs and two 26-tone DRUs in a fixed combination, or eighteen 26-tone DRUs in a fixed combination), a method can be applied to dynamically signal two 242-tone DRUs in any combination (or four 106-tone DRUs and two 26-tone DRUs in any combination, or eighteen 52-tone DRUs and two 26-tone DRUs in any combination, or eighteen 26-tone DRUs in any combination). Here, the 26-tone DRUs / 52-tone DRUs / 106-tone DRUs / 242-tone DRUs may be those defined in Examples 1 / 2 / 3 / 4 or those defined in other ways. Furthermore, if a 484-tone DRU contains four 106-tone DRUs and two 26-tone DRUs as subcarriers, the combination of eight additional subcarriers contained in the 484-tone DRU may correspond to the combination of eight additional subcarriers contained in a 242-tone DRU (the four additional subcarriers and the four additional subcarriers mentioned above).

[0383] As an addition or alternative, if a 484-tone DRU contains eight 52-tone DRUs and two 26-tone DRU subcarriers, or eighteen 26-tone DRU subcarriers, the combination of 16 additional subcarriers included in the 484-tone DRU may include a first set of eight additional subcarriers and a second set of eight additional subcarriers. For example, the first set of eight additional subcarriers may be eight of ±{447, 446, 313, 312, 200, 199, 66, 65} that are not included in the punctured 20MHz channel (for example, eight of the 14 additional subcarriers excluding the two included in the punctured 20MHz channel). Next, the second set of eight additional subcarriers may be eight of ±{500, 393, 366, 259, 253, 146, 119, 12} that are not included in the single 20MHz channel being punctured (for example, eight of the 14 additional subcarriers, excluding the two that are included in the 20MHz channel being punctured).

[0384] Thus, the method of dynamically signaling subcarriers contained in 52-tone DRUs, 106-tone DRUs, 242-tone DRUs, and / or 484-tone DRUs may be useful when DRUs are shifted symbolically to obtain diversity gains (for example, when the subcarrier indices contained in a particular DRU index in the first symbol are different from the subcarrier indices contained in the same particular DRU index in the second symbol).

[0385] When signaling the DRU index to be assigned to the STA using existing RU assignment information (e.g., SIG (e.g., U-SIG and / or UHR-SIG) in the case of DL OFDMA PPDU), a predefined mapping rule between 26-tone RRU indices and 26-tone DRU indices may be applied. For example, the mapping rule may map the DRU index-1 containing the lowest subcarrier to the RRU-1 containing the lowest subcarrier, and so on, in ascending order of RRU index, starting with the DRU containing the next lowest subcarrier. Once such an RRU-to-DRU mapping rule is defined, multiple 26-tone RRU indices can be instructed to assign a 52-tone DRU, 106-tone DRU, 242-tone DRU, or 484-tone DRU to the STA, allowing the STA to determine which 26-tone DRU contains the subcarriers that the assigned 52-tone DRU, 106-tone DRU, 242-tone DRU, or 484-tone DRU contains.

[0386] For example, one STA can be instructed using RU assignment information to have 2 / 4 / 9 / 18 26-tone RRU indices corresponding to 2 / 4 / 9 / 18 26-tone DRUs corresponding to 52-DRU / 106-tone DRU / 242-tone DRU / 484-tone DRU, and the STA ID value contained in the user information corresponding to these 2 / 4 / 9 / 18 26-tone RRUs (for example, the user field in the U-SIG / UHR-SIG field of a DL OFDMA PPDU (for example, a MU PPDU), or the UHR variant user information field of a trigger frame) may be set to the same value which is the ID of that STA. Furthermore, information indicating that a DRU is assigned, and / or information indicating that it is the last of several 26-tone RRU indices corresponding to the DRU assigned to the STA, may be defined in the user information (for example, the user field in the U-SIG / UHR-SIG field of a DL OFDMA PPDU (e.g., MU PPDU), or the UHR variant user information field of a trigger frame).

[0387] Example 7

[0388] As in Example 2 described above, a 52-tone DRU can be predefined to include two 26-tone DRU subcarriers in a fixed combination; as in Example 3 described above, a 106-tone DRU can be predefined to include two 52-tone DRU subcarriers in a fixed combination (or four 26-tone DRU subcarriers in a fixed combination); and as in Example 4 described above, a 242-tone DRU can be predefined to include two 106-tone DRU subcarriers and one additional 26-tone DRU (or four 52-tone DRU subcarriers and one additional 26-tone DRU subcarriers in a fixed combination, or nine 26-tone DRU subcarriers in a fixed combination) by generalizing the DRU index and mapping it to the respective RRU index, thereby flexibly setting 26-tone DRUs / 52-tone DRUs / 242-tone DRUs corresponding to specific 52-tone DRUs / 106-tone DRUs / 242-tone DRUs.

[0389] For example, a 26-tone DRU-a / b / c / d / e / f / g / h / i / j / k / l / m / n / o / p / q / r / s / t / u / v / w / x / y / z / aa can be defined as corresponding to 26-tone DRU-1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 21 / 22 / 23 / 24 / 25 / 26 / 27 in any manner (for example, indices a~aa and indices 1~27 correspond one-to-one, but the corresponding numeric indices for each alphabetical index are determined in ascending order or in any arbitrary order). Here, the positions of the subcarriers included in the 26-tone DRU may be based on the examples in Example 1, or other methods may be applied. Based on this, 52-tone DRU-a / b / c / d / e / f / g / h / i / j / k / l, 106-tone DRU-a / b / c / d / e / f, 242-tone DRU-a / b / c, and 484-tone DRU-a can be defined as corresponding to combinations of lower-size DRU indices as shown in the following example.

[0390] 52-tone DRU-a: 26-tone DRU-a, and 26-tone DRU-o

[0391] 52-tone DRU-b: 26-tone DRU-b, and 26-tone DRU-p

[0392] 52-tone DRU-c: 26-tone DRU-c, and 26-tone DRU-q

[0393] 52-tone DRU-d = 26-tone DRU-d, and 26-tone DRU-r

[0394] 52-tone DRU-e, 26-tone DRU-f, and 26-tone DRU-s

[0395] 52-tone DRU-f, 26-tone DRU-g, and 26-tone DRU-t

[0396] 52-tone DRU-g: 26-tone DRU-h, and 26-tone DRU-u

[0397] 52-tone DRU-h = 26-tone DRU-i, and 26-tone DRU-v

[0398] 52-tone DRU-i, 26-tone DRU-j, and 26-tone DRU-x

[0399] 52-tone DRU-j, 26-tone DRU-k, and 26-tone DRU-y

[0400] 52-tone DRU-k, 26-tone DRU-l, and 26-tone DRU-z

[0401] 52-tone DRU-l, 26-tone DRU-m, and 26-tone DRU-aa

[0402] 106-tone DRU-a: 52-tone DRU-a, 52-tone DRU-g, and two additional subcarriers

[0403] 106-tone DRU-b: 52-tone DRU-b, 52-tone DRU-h, and two additional subcarriers

[0404] 106-tone DRU-c: 52-tone DRU-c, 52-tone DRU-i, and two additional subcarriers

[0405] 106-tone DRU-d: 52-tone DRU-d, 52-tone DRU-j, and two additional subcarriers

[0406] 106-tone DRU-e: 52-tone DRU-e, 52-tone DRU-k, and two additional subcarriers

[0407] 106-tone DRU-f: 52-tone DRU-f, 52-tone DRU-l, and two additional subcarriers

[0408] 242-tone DRU-a: 106-tone DRU-a, 106-tone DRU-d, 26-tone DRU-e, and 4 additional subcarriers

[0409] 242-tone DRU-b: 106-tone DRU-b, 106-tone DRU-e, 26-tone DRU-n, and 4 additional subcarriers

[0410] 242-tone DRU-c: 106-tone DRU-c, 52-tone DRU-f, 26-tone DRU-w, and 4 additional subcarriers

[0411] Here, the two additional subcarriers for the 106-tone DRU may be defined as described in Example 3, and the four additional subcarriers for the 242-tone DRU may be defined as described in Example 4.

[0412] As an addition or alternative, gaps may be used between multiple lower-sized DRU indices corresponding to one higher-sized DRU indice. The value of such gaps may be explicitly signaled to the STA, or implicitly signaled based on other information (e.g., bandwidth information, BSS color information, etc.) without further signaling. For example, 52-tone DRUs and 106-tone DRUs may include subcarriers of lower-sized DRUs as follows:

[0413] 52-tone DRU-a: 26-tone DRU-a, and 26-tone DRU-(a+Gap)

[0414] 52-tone DRU-b: 26-tone DRU-b, and 26-tone DRU-(b+Gap)

[0415] 52-tone DRU-c: 26-tone DRU-c, and 26-tone DRU-(c+Gap)

[0416] 52-tone DRU-d = 26-tone DRU-d, and 26-tone DRU-(d+Gap)

[0417] 52-tone DRU-e: 26-tone DRU-f, and 26-tone DRU-(f+Gap)

[0418] 52-tone DRU-f: 26-tone DRU-g, and 26-tone DRU-(g+Gap)

[0419] 52-tone DRU-g: 26-tone DRU-h, and 26-tone DRU-(h+Gap)

[0420] 52-tone DRU-h = 26-tone DRU-i, and 26-tone DRU-(i+Gap)

[0421] 52-tone DRU-i: 26-tone DRU-j, and 26-tone DRU-(j+Gap)

[0422] 52-tone DRU-j: 26-tone DRU-k, and 26-tone DRU-(k+Gap)

[0423] 52-tone DRU-k: 26-tone DRU-l, and 26-tone DRU-(l+Gap)

[0424] 52-tone DRU-l: 26-tone DRU-m, and 26-tone DRU-(m+Gap)

[0425] 106-tone DRU-a: 52-tone DRU-a, 52-tone DRU-(a+Gap), and two additional subcarriers

[0426] 106-tone DRU-b: 52-tone DRU-b, 52-tone DRU-(b+Gap), and two additional subcarriers

[0427] 106-tone DRU-c: 52-tone DRU-c, 52-tone DRU-(c+Gap), and two additional subcarriers

[0428] 106-tone DRU-d: 52-tone DRU-d, 52-tone DRU-(d+Gap), and two additional subcarriers.

[0429] 106-tone DRU-e: 52-tone DRU-e, 52-tone DRU-(e+Gap), and two additional subcarriers.

[0430] 106-tone DRU-f: 52-tone DRU-f, 52-tone DRU-(f+Gap), and two additional subcarriers

[0431] 242-tone DRU-a: 106-tone DRU-a, 106-tone DRU-(a+Gap), 26-tone DRU-e, and 4 additional subcarriers

[0432] 242-tone DRU-b: 106-tone DRU-b, 106-tone DRU-(b+Gap), 26-tone DRU-n, and 4 additional subcarriers

[0433] 242-tone DRU-c: 106-tone DRU-c, 52-tone DRU-(c+Gap), 26-tone DRU-w, and 4 additional subcarriers

[0434] Here, the two additional subcarriers for the 106-tone DRU may be defined as described in Example 3, and the four additional subcarriers for the 242-tone DRU may be defined as described in Example 4.

[0435] In the example above, the order of the alphabetical index of DRUs does not necessarily have to be related to the order of their positions in the frequency domain. Furthermore, even if DRUs of different sizes have the same alphabetical index, this does not mean that their order within the same-sized DRU index is the same.

[0436] In the example above, the Gap values ​​may be the same or different for each DRU size. For example, the Gap values ​​may be independent for each DRU size, or they may be related.

[0437] Example 8

[0438] This embodiment relates to a subcarrier index of a DRU applied to an 80MHz channel that includes one punctured 20MHz channel among multiple 80MHz channels with a bandwidth greater than 80MHz (e.g., a bandwidth of 160MHz or more).

[0439] In the following example, the set of subcarrier indices contained in each of the one or more DRUs for an x ​​MHz channel containing one punctured 20 MHz channel within a y MHz bandwidth may be denoted as S_x_y. For example, S_80_80 can be assumed to correspond to the subcarrier indices contained in DRUs of various sizes for an 80 MHz channel (i.e., a continuous / discontinuous 60 MHz channel) containing a punctured 20 MHz channel within an 80 MHz bandwidth, as described in the examples of Examples 1 to 7 above.

[0440] Example 8-1

[0441] Within a 160MHz bandwidth, the subcarrier index (S_80_160) at a specific 80MHz that includes the punctured 20MHz channel may be defined as follows:

[0442] The first 80MHz subcarrier index (first S_80_160) containing the punctured 20MHz channel: The DRU subcarrier index (S_80_80) - 512 defined at 80MHz containing the aforementioned punctured 20MHz channel.

[0443] The second 80MHz subcarrier index (second S_80_160) containing the punctured 20MHz channel: the DRU subcarrier index (S_80_80) defined at 80MHz containing the aforementioned punctured 20MHz channel + 512

[0444] For example, it could be expressed as follows:

[0445] The first S_80_160 = S_80_80 - ​​512; and

[0446] Second S_80_160 = S_80_80 + 512

[0447] Example 8-2

[0448] Within a 240MHz bandwidth, the subcarrier index (S_80_240) at a specific 80MHz that includes the punctured 20MHz channel may be defined as follows:

[0449] The first 80MHz subcarrier index (first S_80_240) containing the punctured 20MHz channel: The DRU subcarrier index (S_80_80)-1024 defined at 80MHz containing the aforementioned punctured 20MHz channel.

[0450] The second 80MHz subcarrier index (second S_80_240) containing the punctured 20MHz channel: The DRU subcarrier index (S_80_80) defined at 80MHz containing the aforementioned punctured 20MHz channel.

[0451] The third 80MHz subcarrier index (third S_80_240) containing the punctured 20MHz channel: DRU subcarrier index (S_80_80) defined at 80MHz containing the aforementioned punctured 20MHz channel + 1024

[0452] For example, it can be expressed as follows:

[0453] First S_80_240 = First S_80_80 - ​​1024;

[0454] Second S_80_240 = First S_80_80;

[0455] Third S_80_240 = First S_80_80 + 1024

[0456] Example 8-3

[0457] The subcarrier index (S_80_320) at a specific 80MHz that includes the punctured 20MHz channel within the 320MHz bandwidth may be defined as follows:

[0458] Of the first 160MHz, the 80MHz subcarrier index (first or second S_80_320) containing the punctured 20MHz channel: The 80MHz DRU subcarrier index (first or second S_80_160)-1024 containing the punctured 20MHz channel defined in Example 8-1's 160MHz

[0459] Of the second 160MHz, the 80MHz subcarrier index (third or fourth S_80_320) containing the punctured 20MHz channel: the 80MHz DRU subcarrier index (first or second S_80_160) containing the punctured 20MHz channel defined in Example 8-1 + 1024

[0460] For example, it could be expressed as follows:

[0461] First S_80_320 = First S_80_160 - 1024;

[0462] Second S_80_320 = Second S_80_160 - 1024;

[0463] Third S_80_320 = First S_80_160 + 1024;

[0464] The fourth S_80_320 = the second S_80_160 + 1024

[0465] Example 8-4

[0466] Within a 480MHz bandwidth, the subcarrier index (S_80_480) at a specific 80MHz that includes the punctured 20MHz channel may be defined as follows:

[0467] Of the first 160MHz, the 80MHz subcarrier index (first or second S_80_480) containing the punctured 20MHz channel: The 80MHz DRU subcarrier index (first or second S_80_160)-2048 containing the punctured 20MHz channel defined in Example 8-1's 160MHz

[0468] Of the second 160MHz, the 80MHz subcarrier index (third or fourth S_80_480) includes the punctured 20MHz channel: The 80MHz DRU subcarrier index (first or second S_80_160) includes the punctured 20MHz channel defined in Example 8-1

[0469] Of the third 160MHz, the 80MHz subcarrier index (5th or 6th S_80_480) containing the punctured 20MHz channel: the 80MHz DRU subcarrier index (1st or 2nd S_80_160) containing the punctured 20MHz channel defined in Example 8-1 + 2048

[0470] For example, it could be expressed as follows:

[0471] First S_80_480 = First S_80_160 - 2048;

[0472] Second S_80_480 = Second S_80_160 - 2048;

[0473] The third S_80_480 = the first S_80_160;

[0474] The fourth S_80_480 = the second S_80_160;

[0475] The fifth S_80_480 = the first S_80_160 + 2048;

[0476] The sixth S_80_480 = the second S_80_160 + 2048

[0477] Example 8-5

[0478] Within the 640MHz bandwidth, the subcarrier index (S_80_640) at a specific 80MHz that includes the punctured 20MHz channel may be defined as follows:

[0479] Of the first 320MHz, the 80MHz subcarrier index (1st, 2nd, 3rd, or 4th S_80_640) containing the punctured 20MHz channel: The 80MHz DRU subcarrier index (1st, 2nd, 3rd, or 4th S_80_320)-2048 containing the punctured 20MHz channel defined in Example 8-3

[0480] Of the second 320MHz, the 80MHz subcarrier index (5th, 6th, 7th, or 8th S_80_640) containing the punctured 20MHz channel: the 80MHz DRU subcarrier index (1st, 2nd, 3rd, or 4th S_80_320) containing the punctured 20MHz channel defined in Example 8-3 + 2048

[0481] For example, it can be expressed as follows:

[0482] First S_80_640 = First S_80_320 - 2048;

[0483] Second S_80_640 = Second S_80_320 - 2048;

[0484] Third S_80_640 = Third S_80_320 - 2048;

[0485] The fourth S_80_640 = the fourth S_80_320 - 2048;

[0486] The fifth S_80_640 = the first S_80_320 + 2048;

[0487] The sixth S_80_640 = the second S_80_320 + 2048;

[0488] The 7th S_80_640 = the 3rd S_80_320 + 2048;

[0489] The 8th S_80_640 = the 4th S_80_320 + 2048.

[0490] Unlike existing wireless LAN systems where only RRU is applied, resource utilization efficiency can be improved by transmitting / receiving one or more fields of a PPDU based on DRU tone plans of various sizes applicable to PPDUs when preamble puncturing is applied to any one 20MHz channel of the 80MHz bandwidth as described in this disclosure, in order to support the application of DRU.

[0491] The embodiments described above are combinations of the components and features of the present disclosure in a predetermined form. Each component or feature should be considered optional unless otherwise explicitly mentioned. Each component or feature may be implemented in a form that does not combine with other components or features. It is also possible to combine some components and / or features to constitute embodiments of the present disclosure. The order of operations described in embodiments of the present disclosure may be changed. Some components or features of one embodiment may be included in other embodiments, or replaced by corresponding components or features of other embodiments. It is clear that claims that do not have an explicit reference relationship in the claims may be combined to constitute embodiments, or may be included as new claims by amendment after filing.

[0492] It will be obvious to those skilled in the art that this disclosure can be embodied in other specific forms, provided that the essential features of this disclosure are not deviated from. Therefore, the above-mentioned detailed description should not be constrained in any way and should be considered illustrative. The scope of this disclosure should be determined by a reasonable interpretation of the attached claims, and any modifications within the equivalent scope of this disclosure are included within the scope of this disclosure.

[0493] The scope of this disclosure includes software or machine-executable instructions (e.g., operating systems, applications, firmware, programs, etc.) that cause an apparatus or computer to perform operations according to the methods of various embodiments, and non-transitory computer-readable medium on which such software or instructions are stored and executable on the apparatus or computer. Instructions available for programming a processing system that performs the features described in this disclosure may be stored on / in a storage medium or computer-readable storage medium, and the features described in this disclosure may be embodied using a computer program product including such storage medium. The storage medium may include, but is not limited to, high-speed random-access memory such as DRAM, SRAM, DDR RAM, or other random-access solid-state memory devices, and may include non-volatile memory such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. Memory optionally includes one or more storage devices located remotely from the processor. Memory, or alternatively, non-volatile memory devices within memory, includes non-transitory computer-readable storage medium. The features described in this disclosure may be stored on any one of the machine-readable media and integrated into software and / or firmware that can control the hardware of the processing system and cause the processing system to interact with other mechanisms that utilize the results relating to the embodiments of this disclosure. Such software or firmware may include, but is not limited to, application code, device drivers, operating systems and execution environments / containers.

[0494] [Industrial applicability] Although the method proposed in this disclosure has been primarily described in terms of its application to IEEE 802.11-based systems, it can be applied to a variety of other wireless LAN or wireless communication systems.

[0495] [Claims when filing an international application] [Claim 1] A method performed by a first station (STA) in a wireless local area network (WLAN) system, The steps include: generating a PPDU (physical layer protocol data unit) containing one or more fields; The aforementioned one or more fields are mapped onto one or more DRUs (distributed resource units), The process includes: transmitting the PPDU to one or more second STAs on the remaining 60 MHz channels, excluding the one 20 MHz channel, based on the application of preamble puncturing to any one of four 20 MHz channels in a bandwidth including an 80 MHz channel; Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, The nth (n=1,2,...,27) 26-tone DRU is defined as every 27th subcarrier, which includes the nth lowest subcarrier among the available subcarriers in the 60 MHz channel. [Claim 2] Based on the fact that the one 20MHz channel is the lowest or highest 20MHz channel among the four 20MHz channels, the 60MHz channel is contiguous in the frequency domain. The method according to claim 1, wherein the 60 MHz channel is non-contiguous in the frequency domain based on the fact that the one 20 MHz channel is the second lowest or second highest 20 MHz channel among the four 20 MHz channels. [Claim 3] The available subcarriers within the aforementioned 60MHz channel are: Of the 1024 subcarriers in the aforementioned 80MHz channel, 23 DC (direct current) subcarriers, 42 null subcarriers corresponding to the four 20MHz channels mentioned above, The method according to claim 2, wherein the subcarriers are those available in the 80MHz channel, excluding the 23 guard subcarriers, and the subcarriers are those available in the 80MHz channel, excluding the available subcarrier corresponding to the one 20MHz channel. [Claim 4] Based on the fact that the one 20MHz channel is the lowest 20MHz channel in the frequency domain among the four 20MHz channels, The first 26-tone DRU index includes subcarrier indices -252, -225, -196, -169, -141, -113, -86, -57, -30, 22, 49, 78, 105, 133, 161, 188, 217, 244, 278, 305, 334, 361, 389, 417, 444, and 473. The second 26-tone DRU index includes subcarrier indices -251, -224, -195, -168, -140, -112, -85, -56, -29, 23, 50, 79, 106, 134, 162, 189, 218, 245, 279, 306, 335, 362, 390, 418, 445, and 474. The third 26-tone DRU index includes subcarrier indices -250, -223, -194, -167, -139, -111, -84, -55, -28, 24, 51, 80, 107, 135, 163, 190, 219, 246, 280, 307, 336, 363, 391, 419, 448, and 475. The fourth 26-tone DRU index includes subcarrier indices -249, -222, -193, -166, -138, -110, -83, -54, -27, 25, 52, 81, 108, 136, 164, 191, 220, 247, 281, 308, 337, 364, 392, 420, 449, and 476. The fifth 26-tone DRU index includes subcarrier indices -248, -221, -192, -165, -137, -109, -82, -53, -26, 26, 53, 82, 109, 137, 165, 192, 221, 248, 282, 309, 338, 365, 394, 421, 450, and 477. The sixth 26-tone DRU index includes subcarrier indices -247, -220, -191, -164, -136, -108, -81, -52, -25, 27, 54, 83, 110, 138, 166, 193, 222, 249, 283, 310, 339, 367, 395, 422, 451, and 478. The seventh 26-tone DRU index includes subcarrier indices -246, -219, -190, -163, -135, -107, -80, -51, -24, 28, 55, 84, 111, 139, 167, 194, 223, 250, 284, 311, 340, 368, 396, 423, 452, and 479. The 8th 26-tone DRU index includes subcarrier indices -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, and 480. The 9th 26-tone DRU index includes subcarrier indices -244, -217, -188, -161, -133, -105, -78, -49, -22, 30, 57, 86, 113, 141, 169, 196, 225, 252, 286, 315, 342, 370, 398, 425, 454, and 481. The 10th 26-tone DRU index includes subcarrier indices -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, 170, 197, 226, 260, 287, 316, 343, 371, 399, 426, 455, and 482. The 11th 26-tone DRU index includes subcarrier indices -242, -215, -186, -159, -131, -103, -76, -47, -20, 32, 59, 88, 115, 143, 171, 198, 227, 261, 288, 317, 344, 372, 400, 427, 456, and 483. The 12th 26-tone DRU index includes subcarrier indices -241, -214, -185, -158, -130, -102, -75, -46, -19, 33, 60, 89, 116, 144, 172, 201, 228, 262, 289, 318, 345, 373, 401, 428, 457, and 484. The 13th 26-tone DRU index includes subcarrier indices -240, -213, -184, -157, -129, -101, -74, -45, -18, 34, 61, 90, 117, 145, 173, 202, 229, 263, 290, 319, 346, 374, 402, 429, 458, and 485. The 14th 26-tone DRU index includes subcarrier indices -239, -212, -183, -156, -128, -100, -73, -44, -17, 35, 62, 91, 118, 147, 174, 203, 230, 264, 291, 320, 347, 375, 403, 430, 459, and 486. The 15th 26-tone DRU index includes subcarrier indices -238, -211, -182, -155, -127, -99, -72, -43, -16, 36, 63, 92, 120, 148, 175, 204, 231, 265, 292, 321, 348, 376, 404, 431, 460, and 487. The 16th 26-tone DRU index includes subcarrier indices -237, -210, -181, -154, -126, -98, -71, -42, -15, 37, 64, 93, 121, 149, 176, 205, 232, 266, 293, 322, 349, 377, 405, 432, 461, and 488. The 17th 26-tone DRU index includes subcarrier indices -236, -209, -180, -153, -125, -97, -70, -41, -14, 38, 67, 94, 122, 150, 177, 206, 233, 267, 294, 323, 350, 378, 406, 433, 462, and 489. The 18th 26-tone DRU index includes subcarrier indices -235, -208, -179, -152, -124, -96, -69, -40, -13, 39, 68, 95, 123, 151, 178, 207, 234, 268, 295, 324, 351, 379, 407, 434, 463, and 490. The 19th 26-tone DRU index includes subcarrier indices -234, -207, -178, -151, -123, -95, -68, -39, 13, 40, 69, 96, 124, 152, 179, 208, 235, 269, 296, 325, 352, 380, 408, 435, 464, and 491. The 20th 26-tone DRU index includes subcarrier indices -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, 236, 270, 297, 326, 353, 381, 409, 436, 465, and 492. The 21st 26-tone DRU index includes subcarrier indices -232, -205, -176, -149, -121, -93, -64, -37, 15, 42, 71, 98, 126, 154, 181, 210, 237, 271, 298, 327, 354, 382, ​​410, 437, 466, and 493. The 22nd 26-tone DRU index includes subcarrier indices -231, -204, -175, -148, -120, -92, -63, -36, 16, 43, 72, 99, 127, 155, 182, 211, 238, 272, 299, 328, 355, 383, 411, 438, 467, and 494. The 23rd 26-tone DRU index includes subcarrier indices -230, -203, -174, -147, -118, -91, -62, -35, 17, 44, 73, 100, 128, 156, 183, 212, 239, 273, 300, 329, 356, 384, 412, 439, 468, and 495. The 24th 26-tone DRU index includes subcarrier indices -229, -202, -173, -145, -117, -90, -61, -34, 18, 45, 74, 101, 129, 157, 184, 213, 240, 274, 301, 330, 357, 385, 413, 440, 469, and 496. The 25th 26-tone DRU index includes subcarrier indices -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, 241, 275, 302, 331, 358, 386, 414, 441, 470, and 497. The 26th 26-tone DRU index includes subcarrier indices -227, -198, -171, -143, -115, -88, -59, -32, 20, 47, 76, 103, 131, 159, 186, 215, 242, 276, 303, 332, 359, 387, 415, 442, 471, and 498. The method according to claim 3, wherein the 27th 26-tone DRU index includes subcarrier indices -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, 132, 160, 187, 216, 243, 277, 304, 333, 360, 388, 416, 443, 472, and 499. [Claim 5] Based on the fact that the aforementioned one 20MHz channel is the second lowest 20MHz channel in the frequency domain among the four 20MHz channels, The first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, 22, 49, 78, 105, 133, 161, 188, 217, 244, 278, 305, 334, 361, 389, 417, 444, and 473. The second 26-tone DRU index includes subcarrier indices -498, -471, -442, -415, -387, -359, -332, -303, -276, 23, 50, 79, 106, 134, 162, 189, 218, 245, 279, 306, 335, 362, 390, 418, 445, and 474. The third 26-tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, 24, 51, 80, 107, 135, 163, 190, 219, 246, 280, 307, 336, 363, 391, 419, 448, and 475. The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, 25, 52, 81, 108, 136, 164, 191, 220, 247, 281, 308, 337, 364, 392, 420, 449, and 476. The fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, -356, -329, -300, -273, 26, 53, 82, 109, 137, 165, 192, 221, 248, 282, 309, 338, 365, 394, 421, 450, and 477. The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, 27, 54, 83, 110, 138, 166, 193, 222, 249, 283, 310, 339, 367, 395, 422, 451, and 478. The seventh 26-tone DRU index includes subcarrier indices -493, -466, -437, -410, -382, -354, -327, -298, -271, 28, 55, 84, 111, 139, 167, 194, 223, 250, 284, 311, 340, 368, 396, 423, 452, and 479. The 8th 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, and 480. The 9th 26-tone DRU index includes subcarrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, 30, 57, 86, 113, 141, 169, 196, 225, 252, 286, 315, 342, 370, 398, 425, 454, and 481. The 10th 26-tone DRU index includes subcarrier indices -490, -463, -434, -407, -379, -351, -324, -295, -268, 31, 58, 87, 114, 142, 170, 197, 226, 260, 287, 316, 343, 371, 399, 426, 455, and 482. The 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, 32, 59, 88, 115, 143, 171, 198, 227, 261, 288, 317, 344, 372, 400, 427, 456, and 483. The 12th 26-tone DRU index includes subcarrier indices -488, -461, -432, -405, -377, -349, -322, -293, -266, 33, 60, 89, 116, 144, 172, 201, 228, 262, 289, 318, 345, 373, 401, 428, 457, and 484. The 13th 26-tone DRU index includes subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, 34, 61, 90, 117, 145, 173, 202, 229, 263, 290, 319, 346, 374, 402, 429, 458, and 485. The 14th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, 35, 62, 91, 118, 147, 174, 203, 230, 264, 291, 320, 347, 375, 403, 430, 459, and 486. The 15th 26-tone DRU index includes subcarrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, 36, 63, 92, 120, 148, 175, 204, 231, 265, 292, 321, 348, 376, 404, 431, 460, and 487. The 16th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, 37, 64, 93, 121, 149, 176, 205, 232, 266, 293, 322, 349, 377, 405, 432, 461, and 488. The 17th 26-tone DRU index includes subcarrier indices -483, -456, -427, -400, -372, -344, -317, -288, -261, 38, 67, 94, 122, 150, 177, 206, 233, 267, 294, 323, 350, 378, 406, 433, 462, and 489. The 18th 26-tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, -343, -316, -287, -260, 39, 68, 95, 123, 151, 178, 207, 234, 268, 295, 324, 351, 379, 407, 434, 463, and 490. The 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, 13, 40, 69, 96, 124, 152, 179, 208, 235, 269, 296, 325, 352, 380, 408, 435, 464, and 491. The 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, 14, 41, 70, 97, 125, 153, 180, 209, 236, 270, 297, 326, 353, 381, 409, 436, 465, and 492. The 21st 26-tone DRU index includes subcarrier indices -479, -452, -423, -396, -368, -340, -311, -284, 15, 42, 71, 98, 126, 154, 181, 210, 237, 271, 298, 327, 354, 382, ​​410, 437, 466, and 493. The 22nd 26-tone DRU index includes subcarrier indices -478, -451, -422, -395, -367, -339, -310, -283, 16, 43, 72, 99, 127, 155, 182, 211, 238, 272, 299, 328, 355, 383, 411, 438, 467, and 494. The 23rd 26-tone DRU index includes subcarrier indices -477, -450, -421, -394, -365, -338, -309, -282, 17, 44, 73, 100, 128, 156, 183, 212, 239, 273, 300, 329, 356, 384, 412, 439, 468, and 495. The 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, 18, 45, 74, 101, 129, 157, 184, 213, 240, 274, 301, 330, 357, 385, 413, 440, 469, and 496. The 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280, 19, 46, 75, 102, 130, 158, 185, 214, 241, 275, 302, 331, 358, 386, 414, 441, 470, and 497. The 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, 20, 47, 76, 103, 131, 159, 186, 215, 242, 276, 303, 332, 359, 387, 415, 442, 471, and 498. The method according to claim 4, wherein the 27th 26-tone DRU index includes subcarrier indices -473, -444, -417, -389, -361, -334, -305, -278, 21, 48, 77, 104, 132, 160, 187, 216, 243, 277, 304, 333, 360, 388, 416, 443, 472, and 499. [Claim 6] Based on the fact that the one 20MHz channel is the second highest 20MHz channel in the frequency domain among the four 20MHz channels, The first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, -243, -216, -187, -160, -132, -104, -77, -48, -21, 278, 305, 334, 361, 389, 417, 444, 473, The second 26-tone DRU index includes subcarrier indices -498, -471, -442, -415, -387, -359, -332, -303, -276, -242, -215, -186, -159, -131, -103, -76, -47, -20, 279, 306, 335, 362, 390, 418, 445, and 474. The third 26-tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, -241, -214, -185, -158, -130, -102, -75, -46, -19, 280, 307, 336, 363, 391, 419, 448, and 475. The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, -240, -213, -184, -157, -129, -101, -74, -45, -18, 281, 308, 337, 364, 392, 420, 449, and 476. The fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, -356, -329, -300, -273, -239, -212, -183, -156, -128, -100, -73, -44, -17, 282, 309, 338, 365, 394, 421, 450, and 477. The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, -238, -211, -182, -155, -127, -99, -72, -43, -16, 283, 310, 339, 367, 395, 422, 451, and 478. The seventh 26-tone DRU index includes subcarrier indices -493, -466, -437, -410, -382, -354, -327, -298, -271, -237, -210, -181, -154, -126, -98, -71, -42, -15, 284, 311, 340, 368, 396, 423, 452, and 479. The 8th 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, -236, -209, -180, -153, -125, -97, -70, -41, -14, 285, 314, 341, 369, 397, 424, 453, and 480. The 9th 26-tone DRU index includes subcarrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, -235, -208, -179, -152, -124, -96, -69, -40, -13, 286, 315, 342, 370, 398, 425, 454, and 481. The 10th 26-tone DRU index includes subcarrier indices -490, -463, -434, -407, -379, -351, -324, -295, -268, -234, -207, -178, -151, -123, -95, -68, -39, 260, 287, 316, 343, 371, 399, 426, 455, and 482. The 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, -233, -206, -177, -150, -122, -94, -67, -38, 261, 288, 317, 344, 372, 400, 427, 456, and 483. The 12th 26-tone DRU index includes subcarrier indices -488, -461, -432, -405, -377, -349, -322, -293, -266, -232, -205, -176, -149, -121, -93, -64, -37, 262, 289, 318, 345, 373, 401, 428, 457, and 484. The 13th 26-tone DRU index includes subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, -231, -204, -175, -148, -120, -92, -63, -36, 263, 290, 319, 346, 374, 402, 429, 458, and 485. The 14th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, -230, -203, -174, -147, -118, -91, -62, -35, 264, 291, 320, 347, 375, 403, 430, 459, and 486. The 15th 26-tone DRU index includes subcarrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, -229, -202, -173, -145, -117, -90, -61, -34, 265, 292, 321, 348, 376, 404, 431, 460, and 487. The 16th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, -228, -201, -172, -144, -116, -89, -60, -33, 266, 293, 322, 349, 377, 405, 432, 461, and 488. The 17th 26-tone DRU index includes subcarrier indices -483, -456, -427, -400, -372, -344, -317, -288, -261, -227, -198, -171, -143, -115, -88, -59, -32, 267, 294, 323, 350, 378, 406, 433, 462, and 489. The 18th 26-tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, -343, -316, -287, -260, -226, -197, -170, -142, -114, -87, -58, -31, 268, 295, 324, 351, 379, 407, 434, 463, and 490. The 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, 269, 296, 325, 352, 380, 408, 435, 464, and 491. The 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, -251, -224, -195, -168, -140, -112, -85, -56, -29, 270, 297, 326, 353, 381, 409, 436, 465, and 492. The 21st 26-tone DRU index includes subcarrier indices -479, -452, -423, -396, -368, -340, -311, -284, -250, -223, -194, -167, -139, -111, -84, -55, -28, 271, 298, 327, 354, 382, ​​410, 437, 466, and 493. The 22nd 26-tone DRU index includes subcarrier indices -478, -451, -422, -395, -367, -339, -310, -283, -249, -222, -193, -166, -138, -110, -83, -54, -27, 272, 299, 328, 355, 383, 411, 438, 467, and 494. The 23rd 26-tone DRU index includes subcarrier indices -477, -450, -421, -394, -365, -338, -309, -282, -248, -221, -192, -165, -137, -109, -82, -53, -26, 273, 300, 329, 356, 384, 412, 439, 468, and 495. The 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, -247, -220, -191, -164, -136, -108, -81, -52, -25, 274, 301, 330, 357, 385, 413, 440, 469, and 496. The 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280, -246, -219, -190, -163, -135, -107, -80, -51, -24, 275, 302, 331, 358, 386, 414, 441, 470, and 497. The 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, -245, -218, -189, -162, -134, -106, -79, -50, -23, 276, 303, 332, 359, 387, 415, 442, 471, and 498. The method according to claim 5, wherein the 27th 26-tone DRU index includes subcarrier indices -473, -444, -417, -389, -361, -334, -305, -278, -244, -217, -188, -161, -133, -105, -78, -49, -22, 277, 304, 333, 360, 388, 416, 443, 472, and 499. [Claim 7] Based on the fact that the one 20MHz channel is the highest 20MHz channel in the frequency domain among the four 20MHz channels, The first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, 170, 197, 226, The second 26-tone DRU index includes subcarrier indices -498, -471, -442, -415, -387, -359, -332, -303, -276, -242, -215, -186, -159, -131, -103, -76, -47, -20, 32, 59, 88, 115, 143, 171, 198, and 227. The third 26-tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, -241, -214, -185, -158, -130, -102, -75, -46, -19, 33, 60, 89, 116, 144, 172, 201, and 228. The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, -240, -213, -184, -157, -129, -101, -74, -45, -18, 34, 61, 90, 117, 145, 173, 202, and 229. The fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, -356, -329, -300, -273, -239, -212, -183, -156, -128, -100, -73, -44, -17, 35, 62, 91, 118, 147, 174, 203, and 230. The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, -238, -211, -182, -155, -127, -99, -72, -43, -16, 36, 63, 92, 120, 148, 175, 204, and 231. The seventh 26-tone DRU index includes subcarrier indices -493, -466, -437, -410, -382, -354, -327, -298, -271, -237, -210, -181, -154, -126, -98, -71, -42, -15, 37, 64, 93, 121, 149, 176, 205, and 232. The 8th 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, -236, -209, -180, -153, -125, -97, -70, -41, -14, 38, 67, 94, 122, 150, 177, 206, and 233. The 9th 26-tone DRU index includes subcarrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, -235, -208, -179, -152, -124, -96, -69, -40, -13, 39, 68, 95, 123, 151, 178, 207, and 234. The 10th 26-tone DRU index includes subcarrier indices -490, -463, -434, -407, -379, -351, -324, -295, -268, -234, -207, -178, -151, -123, -95, -68, -39, 13, 40, 69, 96, 124, 152, 179, 208, and 235. The 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, and 236. The 12th 26-tone DRU index includes subcarrier indices -488, -461, -432, -405, -377, -349, -322, -293, -266, -232, -205, -176, -149, -121, -93, -64, -37, 15, 42, 71, 98, 126, 154, 181, 210, and 237. The 13th 26-tone DRU index includes subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, -231, -204, -175, -148, -120, -92, -63, -36, 16, 43, 72, 99, 127, 155, 182, 211, and 238. The 14th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, -230, -203, -174, -147, -118, -91, -62, -35, 17, 44, 73, 100, 128, 156, 183, 212, and 239. The 15th 26-tone DRU index includes subcarrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, -229, -202, -173, -145, -117, -90, -61, -34, 18, 45, 74, 101, 129, 157, 184, 213, and 240. The 16th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, and 241. The 17th 26-tone DRU index includes subcarrier indices -483, -456, -427, -400, -372, -344, -317, -288, -261, -227, -198, -171, -143, -115, -88, -59, -32, 20, 47, 76, 103, 131, 159, 186, 215, and 242. The 18th 26-tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, -343, -316, -287, -260, -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, 132, 160, 187, 216, and 243. The 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, 22, 49, 78, 105, 133, 161, 188, 217, 244, The 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, -251, -224, -195, -168, -140, -112, -85, -56, -29, 23, 50, 79, 106, 134, 162, 189, 218, and 245. The 21st 26-tone DRU index includes subcarrier indices -479, -452, -423, -396, -368, -340, -311, -284, -250, -223, -194, -167, -139, -111, -84, -55, -28, 24, 51, 80, 107, 135, 163, 190, 219, and 246. The 22nd 26-tone DRU index includes subcarrier indices -478, -451, -422, -395, -367, -339, -310, -283, -249, -222, -193, -166, -138, -110, -83, -54, -27, 25, 52, 81, 108, 136, 164, 191, 220, and 247. The 23rd 26-tone DRU index includes subcarrier indices -477, -450, -421, -394, -365, -338, -309, -282, -248, -221, -192, -165, -137, -109, -82, -53, -26, 26, 53, 82, 109, 137, 165, 192, 221, and 248. The 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, -247, -220, -191, -164, -136, -108, -81, -52, -25, 27, 54, 83, 110, 138, 166, 193, 222, and 249. The 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280, -246, -219, -190, -163, -135, -107, -80, -51, -24, 28, 55, 84, 111, 139, 167, 194, 223, and 250. The 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, and 251. The method according to claim 6, wherein the 27th 26-tone DRU index includes subcarrier indices -473, -444, -417, -389, -361, -334, -305, -278, -244, -217, -188, -161, -133, -105, -78, -49, -22, 30, 57, 86, 113, 141, 169, 196, 225, and 252. [Claim 8] Based on the fact that one or more DRUs include a 52-tone DRU, the 52-tone DRU is one of the 12 predefined 52-tone DRUs, The first 52-tone DRU includes subcarriers contained in the first 26-tone DRU and the 15th 26-tone DRU. The second 52-tone DRU includes subcarriers contained in the second 26-tone DRU and the 16th 26-tone DRU. The third 52-tone DRU includes subcarriers contained in the third 26-tone DRU and the 17th 26-tone DRU. The fourth 52-tone DRU includes subcarriers contained in the fourth 26-tone DRU and the eighteenth 26-tone DRU. The fifth 52-tone DRU includes subcarriers contained in the sixth 26-tone DRU and the 19th 26-tone DRU. The sixth 52-tone DRU includes subcarriers contained in the seventh 26-tone DRU and the 20th 26-tone DRU. The seventh 52-tone DRU includes subcarriers contained in the eighth 26-tone DRU and the 21st 26-tone DRU, The eighth 52-tone DRU includes subcarriers contained in the ninth 26-tone DRU and the 22nd 26-tone DRU, The ninth 52-tone DRU includes subcarriers contained in the tenth 26-tone DRU and the 24th 26-tone DRU. The 10th 52-tone DRU includes subcarriers contained in the 11th 26-tone DRU and the 25th 26-tone DRU, The 11th 52-tone DRU includes subcarriers contained in the 12th 26-tone DRU and the 26th 26-tone DRU. The method according to claim 7, wherein the 12th 52-tone DRU includes subcarriers contained in the 13th 26-tone DRU and the 27th 26-tone DRU. [Claim 9] Based on the fact that one or more DRUs include a 106-tone DRU, the 106-tone DRU is one of six predefined 106-tone DRUs, The first 106-tone DRU includes the subcarriers contained in the first 52-tone DRU and the seventh 52-tone DRU, and a first group consisting of two of the twelve null subcarriers. The second 106-tone DRU includes the subcarriers contained in the second 52-tone DRU and the eighth 52-tone DRU, and the second group corresponding to the other two of the twelve null subcarriers. The third 106-tone DRU includes the subcarriers contained in the third 52-tone DRU and the ninth 52-tone DRU, and a third group consisting of two more of the twelve null subcarriers. The fourth 106-tone DRU includes the subcarriers contained in the fourth 52-tone DRU and the tenth 52-tone DRU, and the fourth group which further includes two other null subcarriers from the twelve null subcarriers. The fifth 106-tone DRU includes the subcarriers contained in the fifth 52-tone DRU and the eleventh 52-tone DRU, and the fifth group which further includes two other null subcarriers from the twelve null subcarriers. The method according to claim 8, wherein the sixth 106-tone DRU comprises the subcarriers contained in the sixth 52-tone DRU and the twelfth 52-tone DRU, and the sixth group which further comprises two other null subcarriers from the twelve. [Claim 10] Based on the fact that the indices of the aforementioned 12 null subcarriers are -447, -446, -313, -312, -200, -199, -66, -65, 65, 66, 199, 200, 312, 313, 446, and 447, and that these are the first to twelfth null subcarriers, excluding the four null subcarriers corresponding to the one 20MHz channel, Of the aforementioned Group 1 to Group 6, One of them includes the first null subcarrier and the seventh null subcarrier, The other one includes the second null subcarrier and the eighth null subcarrier, Furthermore, another one includes the third null subcarrier and the ninth null subcarrier, Furthermore, another one includes a fourth null subcarrier and a tenth null subcarrier, Furthermore, another one includes the 5th null subcarrier and the 11th null subcarrier, Another method is the method according to claim 9, further comprising a sixth null subcarrier and a twelfth null subcarrier. [Claim 11] Based on the fact that one or more DRUs include a 242-tone DRU, the 242-tone DRU is one of three predefined 242-tone DRUs. The first 242-tone DRU includes a seventh group consisting of subcarriers included in the first 106-tone DRU, the fourth 106-tone DRU, and the fifth 26-tone DRU, and four of the other twelve null subcarriers. The second 242-tone DRU includes the subcarriers contained in the second 106-tone DRU and the fifth 106-tone DRU, and the 14th 26-tone DRU, and the eighth group which corresponds to the other four of the other twelve null subcarriers. The method according to claim 10, wherein the third 242-tone DRU comprises a ninth group consisting of subcarriers included in the third 106-tone DRU, the sixth 106-tone DRU, and the 23rd 26-tone DRU, and four more of the other twelve null subcarriers. [Claim 12] Based on the fact that the indices of the other 12 null subcarriers are -500, -393, -366, -259, -253, -146, -119, -12, 12, 119, 146, 253, 259, 366, 393, and 500, and that these are the 13th to 24th null subcarriers, excluding the four null subcarriers corresponding to the one 20MHz channel, Of the aforementioned groups 7 through 9, One of them includes the 13th null subcarrier, the 16th null subcarrier, the 19th null subcarrier, and the 22nd null subcarrier. The other one includes the 14th null subcarrier, the 17th null subcarrier, the 20th null subcarrier, and the 23rd null subcarrier. Another one is the method according to claim 11, comprising a 15th null subcarrier, an 18th null subcarrier, a 21st null subcarrier, and a 24th null subcarrier. [Claim 13] Based on the fact that one or more DRUs include a 484-tone DRU, the 484-tone DRU is: The subcarriers included in the first 242-tone DRU and the second 242-tone DRU are Includes subcarriers contained in the first 242-tone DRU and the third 242-tone DRU, or The method according to claim 12, comprising subcarriers contained in the second 242-tone DRU and the third 242-tone DRU. [Claim 14] Based on the fact that S_x_y represents the set of subcarrier indices contained in each of the one or more DRUs for x MHz channels, which include the one 20 MHz channel, within a bandwidth of y MHz, The first S_80_160 = S_80_80 - ​​512, and The method according to claim 1, wherein the second S_80_160 = S_80_80 + 512. [Claim 15] The first S_80_240 = S_80_80 - ​​1024, The second S_80_240 = S_80_80, The third S_80_240 = S_80_80 + 1024. The method according to claim 14. [Claim 16] The first S_80_320 = the first S_80_160 - 1024, The second S_80_320 = the second S_80_160 - 1024, The third S_80_320 = the first S_80_160 + 1024, The fourth S_80_320 = the second S_80_160 + 1024. The method according to claim 15. [Claim 17] The first S_80_480 = the first S_80_160 - 2048, The second S_80_480 = the second S_80_160 - 2048, The third S_80_480 = the first S_80_160, The fourth S_80_480 = the second S_80_160, The fifth S_80_480 = the first S_80_160 + 2048, The sixth S_80_480 = the second S_80_160 + 2048. The method according to claim 16. [Claim 18] The first S_80_640 = the first S_80_320 - 2048, The second S_80_640 = the second S_80_320 - 2048, The third S_80_640 = the third S_80_320 - 2048, The fourth S_80_640 = the fourth S_80_320 - 2048, The fifth S_80_640 = the first S_80_320 + 2048, The sixth S_80_640 = the second S_80_320 + 2048, The 7th S_80_640 = the 3rd S_80_320 + 2048, The 8th S_80_640 = the 4th S_80_320 + 2048. The method according to claim 17. [Claim 19] Based on the resource unit (RU) allocation information included in the PPDU, one or more DRUs are designated, or The method according to claim 1, wherein one or more DRUs are designated based on RU assignment information contained in a trigger frame that triggers the transmission of the PPDU. [Claim 20] The method according to claim 1, wherein the PPDU is a downlink PPDU or an uplink TB (trigger-based) PPDU. [Claim 21] The method according to claim 1, wherein the one or more fields include data fields. [Claim 22] A first station (STA) device in a wireless local area network (WLAN) system, One or more transceivers, The system comprises one or more processors connected to one or more of the aforementioned transceivers, The one or more processors described above are: Generate a PPDU (physical layer protocol data unit) containing one or more fields; and The aforementioned one or more fields are mapped onto one or more DRUs (distributed resource units), Based on the fact that preamble puncturing is applied to any one of the four 20MHz channels in a bandwidth including an 80MHz channel, the PPDU is transmitted to one or more second STAs via one or more transceivers on the remaining 60MHz channels excluding the one 20MHz channel; Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, The nth (n=1,2,...,27) 26-tone DRU is defined as every 27th subcarrier, which includes the nth lowest subcarrier among the available subcarriers in the 60 MHz channel. [Claim 23] A method performed by a second station (STA) in a wireless local area network (WLAN) system, The steps include: receiving a PPDU (physical layer protocol data unit) containing one or more fields from the first STA on the remaining 60 MHz channels, excluding the said 20 MHz channel, based on the application of preamble puncturing to any one of the four 20 MHz channels in a bandwidth including an 80 MHz channel; and The process includes the step of decoding one or more fields mapped onto one or more DRUs (distributed resource units); Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, The nth (n=1,2,...,27) 26-tone DRU is defined as every 27th subcarrier, which includes the nth lowest subcarrier among the available subcarriers in the 60 MHz channel. [Claim 24] A second station (STA) device in a wireless local area network (WLAN) system, One or more transceivers, The system comprises one or more processors connected to one or more of the aforementioned transceivers, The one or more processors described above are: Based on the application of preamble puncturing to any one of the four 20MHz channels in a bandwidth including an 80MHz channel, one or more transceivers receive a PPDU (physical layer protocol data unit) containing one or more fields on the remaining 60MHz channels excluding the one 20MHz channel from the first STA; and Configured to decode one or more fields mapped onto one or more DRUs (distributed resource units); Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, The nth (n=1,2,...,27) 26-tone DRU is defined as every 27th subcarrier, which includes the nth lowest subcarrier among the available subcarriers in the 60 MHz channel. [Claim 25] A processing device configured to control a station (STA) in a wireless local area network (WLAN) system, One or more processors, A processing device comprising: one or more computer memories operably connected to one or more processors, which store instructions for performing the method according to any one of claims 1 to 21, based on that they are executed by the one or more processors. [Claim 26] One or more non-transitory computer-readable media for storing one or more instructions, A computer-readable medium in which the one or more instructions are executed by one or more processors and control a device in a wireless LAN system to perform the method according to any one of claims 1 to 21.

Claims

1. A method performed by a first station (STA) in a wireless local area network (WLAN) system, The steps include: generating a PPDU (physical layer protocol data unit) containing one or more fields; The one or more fields are mapped onto one or more DRUs (distributed resource units), The steps include: transmitting the PPDU to one or more second STAs on the remaining 60 MHz channels, excluding the one 20 MHz channel, based on the application of preamble puncturing to any one of four 20 MHz channels in a bandwidth including an 80 MHz channel; Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, A method in which the nth (n = 1, 2, ..., 27) 26-tone DRU is defined as every 27th subcarrier, containing the nth lowest subcarrier among the available subcarriers in the 60 MHz channel.

2. Based on the fact that the one 20 MHz channel is the lowest or highest 20 MHz channel among the four 20 MHz channels, the 60 MHz channel is continuous in the frequency domain. The method according to claim 1, wherein the 60 MHz channel is non-contiguous in the frequency domain, based on the fact that the one 20 MHz channel is the second lowest or second highest 20 MHz channel among the four 20 MHz channels.

3. The available subcarriers within the aforementioned 60 MHz channel are: Of the 1024 subcarriers in the aforementioned 80MHz channel, 23 DC (direct current) subcarriers, 42 null subcarriers corresponding to the four 20MHz channels, The method according to claim 2, wherein the subcarriers are those available in the 80 MHz channel, excluding the 23 guard subcarriers, and excluding the available subcarriers corresponding to the one 20 MHz channel.

4. Based on the fact that the one 20 MHz channel is the lowest 20 MHz channel in the frequency domain among the four 20 MHz channels, The first 26-tone DRU index includes subcarrier indices -252, -225, -196, -169, -141, -113, -86, -57, -30, 22, 49, 78, 105, 133, 161, 188, 217, 244, 278, 305, 334, 361, 389, 417, 444, and 473. The second 26-tone DRU index includes subcarrier indices -251, -224, -195, -168, -140, -112, -85, -56, -29, 23, 50, 79, 106, 134, 162, 189, 218, 245, 279, 306, 335, 362, 390, 418, 445, and 474. The third 26-tone DRU index includes subcarrier indices -250, -223, -194, -167, -139, -111, -84, -55, -28, 24, 51, 80, 107, 135, 163, 190, 219, 246, 280, 307, 336, 363, 391, 419, 448, and 475. The fourth 26-tone DRU index includes subcarrier indices -249, -222, -193, -166, -138, -110, -83, -54, -27, 25, 52, 81, 108, 136, 164, 191, 220, 247, 281, 308, 337, 364, 392, 420, 449, and 476. The fifth 26-tone DRU index includes subcarrier indices -248, -221, -192, -165, -137, -109, -82, -53, -26, 26, 53, 82, 109, 137, 165, 192, 221, 248, 282, 309, 338, 365, 394, 421, 450, and 477. The sixth 26-tone DRU index includes subcarrier indices -247, -220, -191, -164, -136, -108, -81, -52, -25, 27, 54, 83, 110, 138, 166, 193, 222, 249, 283, 310, 339, 367, 395, 422, 451, and 478. The seventh 26-tone DRU index includes subcarrier indices -246, -219, -190, -163, -135, -107, -80, -51, -24, 28, 55, 84, 111, 139, 167, 194, 223, 250, 284, 311, 340, 368, 396, 423, 452, and 479. The eighth 26-tone DRU index includes subcarrier indices -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, and 480. The 9th 26-tone DRU index includes subcarrier indices -244, -217, -188, -161, -133, -105, -78, -49, -22, 30, 57, 86, 113, 141, 169, 196, 225, 252, 286, 315, 342, 370, 398, 425, 454, and 481. The 10th 26-tone DRU index includes subcarrier indices -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, 170, 197, 226, 260, 287, 316, 343, 371, 399, 426, 455, and 482. The 11th 26-tone DRU index includes subcarrier indices -242, -215, -186, -159, -131, -103, -76, -47, -20, 32, 59, 88, 115, 143, 171, 198, 227, 261, 288, 317, 344, 372, 400, 427, 456, and 483. The 12th 26-tone DRU index includes subcarrier indices -241, -214, -185, -158, -130, -102, -75, -46, -19, 33, 60, 89, 116, 144, 172, 201, 228, 262, 289, 318, 345, 373, 401, 428, 457, and 484. The 13th 26-tone DRU index includes subcarrier indices -240, -213, -184, -157, -129, -101, -74, -45, -18, 34, 61, 90, 117, 145, 173, 202, 229, 263, 290, 319, 346, 374, 402, 429, 458, and 485. The 14th 26-tone DRU index includes subcarrier indices -239, -212, -183, -156, -128, -100, -73, -44, -17, 35, 62, 91, 118, 147, 174, 203, 230, 264, 291, 320, 347, 375, 403, 430, 459, and 486. The 15th 26-tone DRU index includes subcarrier indices -238, -211, -182, -155, -127, -99, -72, -43, -16, 36, 63, 92, 120, 148, 175, 204, 231, 265, 292, 321, 348, 376, 404, 431, 460, and 487. The 16th 26-tone DRU index includes subcarrier indices -237, -210, -181, -154, -126, -98, -71, -42, -15, 37, 64, 93, 121, 149, 176, 205, 232, 266, 293, 322, 349, 377, 405, 432, 461, and 488. The 17th 26-tone DRU index includes subcarrier indices -236, -209, -180, -153, -125, -97, -70, -41, -14, 38, 67, 94, 122, 150, 177, 206, 233, 267, 294, 323, 350, 378, 406, 433, 462, and 489. The 18th 26-tone DRU index includes subcarrier indices -235, -208, -179, -152, -124, -96, -69, -40, -13, 39, 68, 95, 123, 151, 178, 207, 234, 268, 295, 324, 351, 379, 407, 434, 463, and 490. The 19th 26-tone DRU index includes subcarrier indices -234, -207, -178, -151, -123, -95, -68, -39, 13, 40, 69, 96, 124, 152, 179, 208, 235, 269, 296, 325, 352, 380, 408, 435, 464, and 491. The 20th 26-tone DRU index includes subcarrier indices -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, 236, 270, 297, 326, 353, 381, 409, 436, 465, and 492. The 21st 26-tone DRU index includes subcarrier indices -232, -205, -176, -149, -121, -93, -64, -37, 15, 42, 71, 98, 126, 154, 181, 210, 237, 271, 298, 327, 354, 382, ​​410, 437, 466, and 493. The 22nd 26-tone DRU index includes subcarrier indices -231, -204, -175, -148, -120, -92, -63, -36, 16, 43, 72, 99, 127, 155, 182, 211, 238, 272, 299, 328, 355, 383, 411, 438, 467, and 494. The 23rd 26-tone DRU index includes subcarrier indices -230, -203, -174, -147, -118, -91, -62, -35, 17, 44, 73, 100, 128, 156, 183, 212, 239, 273, 300, 329, 356, 384, 412, 439, 468, and 495. The 24th 26-tone DRU index includes subcarrier indices -229, -202, -173, -145, -117, -90, -61, -34, 18, 45, 74, 101, 129, 157, 184, 213, 240, 274, 301, 330, 357, 385, 413, 440, 469, and 496. The 25th 26-tone DRU index includes subcarrier indices -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, 241, 275, 302, 331, 358, 386, 414, 441, 470, and 497. The 26th 26-tone DRU index includes subcarrier indices -227, -198, -171, -143, -115, -88, -59, -32, 20, 47, 76, 103, 131, 159, 186, 215, 242, 276, 303, 332, 359, 387, 415, 442, 471, and 498. The method according to claim 3, wherein the 27th 26-tone DRU index includes subcarrier indices -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, 132, 160, 187, 216, 243, 277, 304, 333, 360, 388, 416, 443, 472, and 499.

5. Based on the fact that the aforementioned one 20 MHz channel is the second lowest 20 MHz channel in the frequency domain among the four 20 MHz channels, The first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, 22, 49, 78, 105, 133, 161, 188, 217, 244, 278, 305, 334, 361, 389, 417, 444, and 473. The second 26-tone DRU index includes subcarrier indices -498, -471, -442, -415, -387, -359, -332, -303, -276, 23, 50, 79, 106, 134, 162, 189, 218, 245, 279, 306, 335, 362, 390, 418, 445, and 474. The third 26-tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, 24, 51, 80, 107, 135, 163, 190, 219, 246, 280, 307, 336, 363, 391, 419, 448, and 475. The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, 25, 52, 81, 108, 136, 164, 191, 220, 247, 281, 308, 337, 364, 392, 420, 449, and 476. The fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, -356, -329, -300, -273, 26, 53, 82, 109, 137, 165, 192, 221, 248, 282, 309, 338, 365, 394, 421, 450, and 477. The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, 27, 54, 83, 110, 138, 166, 193, 222, 249, 283, 310, 339, 367, 395, 422, 451, and 478. The seventh 26-tone DRU index includes subcarrier indices -493, -466, -437, -410, -382, -354, -327, -298, -271, 28, 55, 84, 111, 139, 167, 194, 223, 250, 284, 311, 340, 368, 396, 423, 452, and 479. The eighth 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, 29, 56, 85, 112, 140, 168, 195, 224, 251, 285, 314, 341, 369, 397, 424, 453, and 480. The 9th 26-tone DRU index includes subcarrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, 30, 57, 86, 113, 141, 169, 196, 225, 252, 286, 315, 342, 370, 398, 425, 454, and 481. The 10th 26-tone DRU index includes subcarrier indices -490, -463, -434, -407, -379, -351, -324, -295, -268, 31, 58, 87, 114, 142, 170, 197, 226, 260, 287, 316, 343, 371, 399, 426, 455, and 482. The 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, 32, 59, 88, 115, 143, 171, 198, 227, 261, 288, 317, 344, 372, 400, 427, 456, and 483. The 12th 26-tone DRU index includes subcarrier indices -488, -461, -432, -405, -377, -349, -322, -293, -266, 33, 60, 89, 116, 144, 172, 201, 228, 262, 289, 318, 345, 373, 401, 428, 457, and 484. The 13th 26-tone DRU index includes subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, 34, 61, 90, 117, 145, 173, 202, 229, 263, 290, 319, 346, 374, 402, 429, 458, and 485. The 14th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, 35, 62, 91, 118, 147, 174, 203, 230, 264, 291, 320, 347, 375, 403, 430, 459, and 486. The 15th 26-tone DRU index includes subcarrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, 36, 63, 92, 120, 148, 175, 204, 231, 265, 292, 321, 348, 376, 404, 431, 460, and 487. The 16th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, 37, 64, 93, 121, 149, 176, 205, 232, 266, 293, 322, 349, 377, 405, 432, 461, and 488. The 17th 26-tone DRU index includes subcarrier indices -483, -456, -427, -400, -372, -344, -317, -288, -261, 38, 67, 94, 122, 150, 177, 206, 233, 267, 294, 323, 350, 378, 406, 433, 462, and 489. The 18th 26-tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, -343, -316, -287, -260, 39, 68, 95, 123, 151, 178, 207, 234, 268, 295, 324, 351, 379, 407, 434, 463, and 490. The 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, 13, 40, 69, 96, 124, 152, 179, 208, 235, 269, 296, 325, 352, 380, 408, 435, 464, and 491. The 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, 14, 41, 70, 97, 125, 153, 180, 209, 236, 270, 297, 326, 353, 381, 409, 436, 465, and 492. The 21st 26-tone DRU index includes subcarrier indices -479, -452, -423, -396, -368, -340, -311, -284, 15, 42, 71, 98, 126, 154, 181, 210, 237, 271, 298, 327, 354, 382, ​​410, 437, 466, and 493. The 22nd 26-tone DRU index includes subcarrier indices -478, -451, -422, -395, -367, -339, -310, -283, 16, 43, 72, 99, 127, 155, 182, 211, 238, 272, 299, 328, 355, 383, 411, 438, 467, and 494. The 23rd 26-tone DRU index includes subcarrier indices -477, -450, -421, -394, -365, -338, -309, -282, 17, 44, 73, 100, 128, 156, 183, 212, 239, 273, 300, 329, 356, 384, 412, 439, 468, and 495. The 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, 18, 45, 74, 101, 129, 157, 184, 213, 240, 274, 301, 330, 357, 385, 413, 440, 469, and 496. The 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280, 19, 46, 75, 102, 130, 158, 185, 214, 241, 275, 302, 331, 358, 386, 414, 441, 470, and 497. The 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, 20, 47, 76, 103, 131, 159, 186, 215, 242, 276, 303, 332, 359, 387, 415, 442, 471, and 498. The method according to claim 4, wherein the 27th 26-tone DRU index includes subcarrier indices -473, -444, -417, -389, -361, -334, -305, -278, 21, 48, 77, 104, 132, 160, 187, 216, 243, 277, 304, 333, 360, 388, 416, 443, 472, and 499.

6. Based on the fact that the aforementioned one 20 MHz channel is the second highest 20 MHz channel in the frequency domain among the four 20 MHz channels, The first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, -243, -216, -187, -160, -132, -104, -77, -48, -21, 278, 305, 334, 361, 389, 417, 444, and 473. The second 26-tone DRU index includes subcarrier indices -498, -471, -442, -415, -387, -359, -332, -303, -276, -242, -215, -186, -159, -131, -103, -76, -47, -20, 279, 306, 335, 362, 390, 418, 445, and 474. The third 26-tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, -241, -214, -185, -158, -130, -102, -75, -46, -19, 280, 307, 336, 363, 391, 419, 448, and 475. The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, -240, -213, -184, -157, -129, -101, -74, -45, -18, 281, 308, 337, 364, 392, 420, 449, and 476. The fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, -356, -329, -300, -273, -239, -212, -183, -156, -128, -100, -73, -44, -17, 282, 309, 338, 365, 394, 421, 450, and 477. The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, -238, -211, -182, -155, -127, -99, -72, -43, -16, 283, 310, 339, 367, 395, 422, 451, and 478. The seventh 26-tone DRU index includes subcarrier indices -493, -466, -437, -410, -382, -354, -327, -298, -271, -237, -210, -181, -154, -126, -98, -71, -42, -15, 284, 311, 340, 368, 396, 423, 452, and 479. The eighth 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, -236, -209, -180, -153, -125, -97, -70, -41, -14, 285, 314, 341, 369, 397, 424, 453, and 480. The 9th 26-tone DRU index includes subcarrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, -235, -208, -179, -152, -124, -96, -69, -40, -13, 286, 315, 342, 370, 398, 425, 454, and 481. The 10th 26-tone DRU index includes subcarrier indices -490, -463, -434, -407, -379, -351, -324, -295, -268, -234, -207, -178, -151, -123, -95, -68, -39, 260, 287, 316, 343, 371, 399, 426, 455, and 482. The 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, -233, -206, -177, -150, -122, -94, -67, -38, 261, 288, 317, 344, 372, 400, 427, 456, and 483. The 12th 26-tone DRU index includes subcarrier indices -488, -461, -432, -405, -377, -349, -322, -293, -266, -232, -205, -176, -149, -121, -93, -64, -37, 262, 289, 318, 345, 373, 401, 428, 457, and 484. The 13th 26-tone DRU index includes subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, -231, -204, -175, -148, -120, -92, -63, -36, 263, 290, 319, 346, 374, 402, 429, 458, and 485. The 14th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, -230, -203, -174, -147, -118, -91, -62, -35, 264, 291, 320, 347, 375, 403, 430, 459, and 486. The 15th 26-tone DRU index includes subcarrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, -229, -202, -173, -145, -117, -90, -61, -34, 265, 292, 321, 348, 376, 404, 431, 460, and 487. The 16th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, -228, -201, -172, -144, -116, -89, -60, -33, 266, 293, 322, 349, 377, 405, 432, 461, and 488. The 17th 26-tone DRU index includes subcarrier indices -483, -456, -427, -400, -372, -344, -317, -288, -261, -227, -198, -171, -143, -115, -88, -59, -32, 267, 294, 323, 350, 378, 406, 433, 462, and 489. The 18th 26-tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, -343, -316, -287, -260, -226, -197, -170, -142, -114, -87, -58, -31, 268, 295, 324, 351, 379, 407, 434, 463, and 490. The 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, 269, 296, 325, 352, 380, 408, 435, 464, and 491. The 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, -251, -224, -195, -168, -140, -112, -85, -56, -29, 270, 297, 326, 353, 381, 409, 436, 465, and 492. The 21st 26-tone DRU index includes subcarrier indices -479, -452, -423, -396, -368, -340, -311, -284, -250, -223, -194, -167, -139, -111, -84, -55, -28, 271, 298, 327, 354, 382, ​​410, 437, 466, and 493. The 22nd 26-tone DRU index includes subcarrier indices -478, -451, -422, -395, -367, -339, -310, -283, -249, -222, -193, -166, -138, -110, -83, -54, -27, 272, 299, 328, 355, 383, 411, 438, 467, and 494. The 23rd 26-tone DRU index includes subcarrier indices -477, -450, -421, -394, -365, -338, -309, -282, -248, -221, -192, -165, -137, -109, -82, -53, -26, 273, 300, 329, 356, 384, 412, 439, 468, and 495. The 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, -247, -220, -191, -164, -136, -108, -81, -52, -25, 274, 301, 330, 357, 385, 413, 440, 469, and 496. The 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280, -246, -219, -190, -163, -135, -107, -80, -51, -24, 275, 302, 331, 358, 386, 414, 441, 470, and 497. The 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, -245, -218, -189, -162, -134, -106, -79, -50, -23, 276, 303, 332, 359, 387, 415, 442, 471, and 498. The method according to claim 5, wherein the 27th 26-tone DRU index includes subcarrier indices -473, -444, -417, -389, -361, -334, -305, -278, -244, -217, -188, -161, -133, -105, -78, -49, -22, 277, 304, 333, 360, 388, 416, 443, 472, and 499.

7. Based on the fact that the one 20 MHz channel is the highest 20 MHz channel in the frequency domain among the four 20 MHz channels, The first 26-tone DRU index includes subcarrier indices -499, -472, -443, -416, -388, -360, -333, -304, -277, -243, -216, -187, -160, -132, -104, -77, -48, -21, 31, 58, 87, 114, 142, 170, 197, and 226. The second 26-tone DRU index includes subcarrier indices -498, -471, -442, -415, -387, -359, -332, -303, -276, -242, -215, -186, -159, -131, -103, -76, -47, -20, 32, 59, 88, 115, 143, 171, 198, and 227. The third 26-tone DRU index includes subcarrier indices -497, -470, -441, -414, -386, -358, -331, -302, -275, -241, -214, -185, -158, -130, -102, -75, -46, -19, 33, 60, 89, 116, 144, 172, 201, and 228. The fourth 26-tone DRU index includes subcarrier indices -496, -469, -440, -413, -385, -357, -330, -301, -274, -240, -213, -184, -157, -129, -101, -74, -45, -18, 34, 61, 90, 117, 145, 173, 202, and 229. The fifth 26-tone DRU index includes subcarrier indices -495, -468, -439, -412, -384, -356, -329, -300, -273, -239, -212, -183, -156, -128, -100, -73, -44, -17, 35, 62, 91, 118, 147, 174, 203, and 230. The sixth 26-tone DRU index includes subcarrier indices -494, -467, -438, -411, -383, -355, -328, -299, -272, -238, -211, -182, -155, -127, -99, -72, -43, -16, 36, 63, 92, 120, 148, 175, 204, and 231. The seventh 26-tone DRU index includes subcarrier indices -493, -466, -437, -410, -382, -354, -327, -298, -271, -237, -210, -181, -154, -126, -98, -71, -42, -15, 37, 64, 93, 121, 149, 176, 205, and 232. The eighth 26-tone DRU index includes subcarrier indices -492, -465, -436, -409, -381, -353, -326, -297, -270, -236, -209, -180, -153, -125, -97, -70, -41, -14, 38, 67, 94, 122, 150, 177, 206, and 233. The 9th 26-tone DRU index includes subcarrier indices -491, -464, -435, -408, -380, -352, -325, -296, -269, -235, -208, -179, -152, -124, -96, -69, -40, -13, 39, 68, 95, 123, 151, 178, 207, and 234. The 10th 26-tone DRU index includes subcarrier indices -490, -463, -434, -407, -379, -351, -324, -295, -268, -234, -207, -178, -151, -123, -95, -68, -39, 13, 40, 69, 96, 124, 152, 179, 208, and 235. The 11th 26-tone DRU index includes subcarrier indices -489, -462, -433, -406, -378, -350, -323, -294, -267, -233, -206, -177, -150, -122, -94, -67, -38, 14, 41, 70, 97, 125, 153, 180, 209, and 236. The 12th 26-tone DRU index includes subcarrier indices -488, -461, -432, -405, -377, -349, -322, -293, -266, -232, -205, -176, -149, -121, -93, -64, -37, 15, 42, 71, 98, 126, 154, 181, 210, and 237. The 13th 26-tone DRU index includes subcarrier indices -487, -460, -431, -404, -376, -348, -321, -292, -265, -231, -204, -175, -148, -120, -92, -63, -36, 16, 43, 72, 99, 127, 155, 182, 211, and 238. The 14th 26-tone DRU index includes subcarrier indices -486, -459, -430, -403, -375, -347, -320, -291, -264, -230, -203, -174, -147, -118, -91, -62, -35, 17, 44, 73, 100, 128, 156, 183, 212, and 239. The 15th 26-tone DRU index includes subcarrier indices -485, -458, -429, -402, -374, -346, -319, -290, -263, -229, -202, -173, -145, -117, -90, -61, -34, 18, 45, 74, 101, 129, 157, 184, 213, and 240. The 16th 26-tone DRU index includes subcarrier indices -484, -457, -428, -401, -373, -345, -318, -289, -262, -228, -201, -172, -144, -116, -89, -60, -33, 19, 46, 75, 102, 130, 158, 185, 214, and 241. The 17th 26-tone DRU index includes subcarrier indices -483, -456, -427, -400, -372, -344, -317, -288, -261, -227, -198, -171, -143, -115, -88, -59, -32, 20, 47, 76, 103, 131, 159, 186, 215, and 242. The 18th 26-tone DRU index includes subcarrier indices -482, -455, -426, -399, -371, -343, -316, -287, -260, -226, -197, -170, -142, -114, -87, -58, -31, 21, 48, 77, 104, 132, 160, 187, 216, and 243. The 19th 26-tone DRU index includes subcarrier indices -481, -454, -425, -398, -370, -342, -315, -286, -252, -225, -196, -169, -141, -113, -86, -57, -30, 22, 49, 78, 105, 133, 161, 188, 217, and 244. The 20th 26-tone DRU index includes subcarrier indices -480, -453, -424, -397, -369, -341, -314, -285, -251, -224, -195, -168, -140, -112, -85, -56, -29, 23, 50, 79, 106, 134, 162, 189, 218, and 245. The 21st 26-tone DRU index includes subcarrier indices -479, -452, -423, -396, -368, -340, -311, -284, -250, -223, -194, -167, -139, -111, -84, -55, -28, 24, 51, 80, 107, 135, 163, 190, 219, and 246. The 22nd 26-tone DRU index includes subcarrier indices -478, -451, -422, -395, -367, -339, -310, -283, -249, -222, -193, -166, -138, -110, -83, -54, -27, 25, 52, 81, 108, 136, 164, 191, 220, and 247. The 23rd 26-tone DRU index includes subcarrier indices -477, -450, -421, -394, -365, -338, -309, -282, -248, -221, -192, -165, -137, -109, -82, -53, -26, 26, 53, 82, 109, 137, 165, 192, 221, and 248. The 24th 26-tone DRU index includes subcarrier indices -476, -449, -420, -392, -364, -337, -308, -281, -247, -220, -191, -164, -136, -108, -81, -52, -25, 27, 54, 83, 110, 138, 166, 193, 222, and 249. The 25th 26-tone DRU index includes subcarrier indices -475, -448, -419, -391, -363, -336, -307, -280, -246, -219, -190, -163, -135, -107, -80, -51, -24, 28, 55, 84, 111, 139, 167, 194, 223, and 250. The 26th 26-tone DRU index includes subcarrier indices -474, -445, -418, -390, -362, -335, -306, -279, -245, -218, -189, -162, -134, -106, -79, -50, -23, 29, 56, 85, 112, 140, 168, 195, 224, and 251. The method according to claim 6, wherein the 27th 26-tone DRU index includes subcarrier indices -473, -444, -417, -389, -361, -334, -305, -278, -244, -217, -188, -161, -133, -105, -78, -49, -22, 30, 57, 86, 113, 141, 169, 196, 225, and 252.

8. Based on the fact that one or more DRUs include a 52-tone DRU, the 52-tone DRU is one of the 12 predefined 52-tone DRUs. The first 52-tone DRU includes subcarriers contained in the first 26-tone DRU and the 15th 26-tone DRU. The second 52-tone DRU includes subcarriers contained in the second 26-tone DRU and the sixteenth 26-tone DRU. The third 52-tone DRU includes subcarriers contained in the third 26-tone DRU and the seventeenth 26-tone DRU. The fourth 52-tone DRU includes subcarriers contained in the fourth 26-tone DRU and the eighteenth 26-tone DRU. The fifth 52-tone DRU includes subcarriers contained in the sixth 26-tone DRU and the 19th 26-tone DRU. The sixth 52-tone DRU includes subcarriers contained in the seventh 26-tone DRU and the 20th 26-tone DRU. The seventh 52-tone DRU includes subcarriers contained in the eighth 26-tone DRU and the 21st 26-tone DRU. The eighth 52-tone DRU includes subcarriers contained in the ninth 26-tone DRU and the 22nd 26-tone DRU, The ninth 52-tone DRU includes subcarriers contained in the tenth 26-tone DRU and the 24th 26-tone DRU. The 10th 52-tone DRU includes subcarriers contained in the 11th 26-tone DRU and the 25th 26-tone DRU. The 11th 52-tone DRU includes subcarriers contained in the 12th 26-tone DRU and the 26th 26-tone DRU, The method according to claim 7, wherein the 12th 52-tone DRU includes subcarriers contained in the 13th 26-tone DRU and the 27th 26-tone DRU.

9. Based on the fact that one or more DRUs include a 106-tone DRU, the 106-tone DRU is one of six predefined 106-tone DRUs. The first 106-tone DRU includes the subcarriers contained in the first 52-tone DRU and the seventh 52-tone DRU, and a first group consisting of two of the twelve null subcarriers. The second 106-tone DRU includes the subcarriers contained in the second 52-tone DRU and the eighth 52-tone DRU, and the second group corresponding to the other two of the twelve null subcarriers. The third 106-tone DRU includes the subcarriers contained in the third 52-tone DRU and the ninth 52-tone DRU, and a third group corresponding to two more of the twelve null subcarriers. The fourth 106-tone DRU includes the subcarriers contained in the fourth 52-tone DRU and the tenth 52-tone DRU, and the fourth group which further includes two other null subcarriers from the twelve null subcarriers. The fifth 106-tone DRU includes the subcarriers contained in the fifth 52-tone DRU and the eleventh 52-tone DRU, and the fifth group which further includes two other null subcarriers from the twelve null subcarriers. The method according to claim 8, wherein the sixth 106-tone DRU comprises the subcarriers included in the sixth 52-tone DRU and the twelfth 52-tone DRU, and the sixth group which further comprises two other null subcarriers from the twelve.

10. Based on the fact that the indices of the aforementioned 12 null subcarriers are -447, -446, -313, -312, -200, -199, -66, -65, 65, 66, 199, 200, 312, 313, 446, and 447, and that these are the first to twelfth null subcarriers, excluding the four null subcarriers corresponding to one 20 MHz channel, Of the aforementioned groups 1 through 6, One of them includes the first null subcarrier and the seventh null subcarrier, The other one includes the second null subcarrier and the eighth null subcarrier, Furthermore, another one includes a third null subcarrier and a ninth null subcarrier, Furthermore, the other one includes a fourth null subcarrier and a tenth null subcarrier, Furthermore, the other includes a fifth null subcarrier and an eleventh null subcarrier, Another method is the method according to claim 9, further comprising a sixth null subcarrier and a twelfth null subcarrier.

11. Based on the fact that one or more DRUs include a 242-tone DRU, the 242-tone DRU is one of three predefined 242-tone DRUs. The first 242-tone DRU includes subcarriers contained in the first 106-tone DRU, the fourth 106-tone DRU, and the fifth 26-tone DRU, and a seventh group corresponding to four of the other twelve null subcarriers. The second 242-tone DRU includes the subcarriers contained in the second 106-tone DRU and the fifth 106-tone DRU and the 14th 26-tone DRU, and the eighth group which corresponds to the other four of the other twelve null subcarriers. The method according to claim 10, wherein the third 242-tone DRU comprises a ninth group consisting of subcarriers included in the third 106-tone DRU, the sixth 106-tone DRU, and the 23rd 26-tone DRU, and four more of the other twelve null subcarriers.

12. Based on the fact that the indices of the other 12 null subcarriers are -500, -393, -366, -259, -253, -146, -119, -12, 12, 119, 146, 253, 259, 366, 393, and 500, and that these are the 13th to 24th null subcarriers, excluding the four null subcarriers corresponding to the one 20 MHz channel, Of the aforementioned groups 7 through 9, One of them includes the 13th null subcarrier, the 16th null subcarrier, the 19th null subcarrier, and the 22nd null subcarrier. The other one includes the 14th null subcarrier, the 17th null subcarrier, the 20th null subcarrier, and the 23rd null subcarrier. Another one is the method according to claim 11, further comprising a 15th null subcarrier, an 18th null subcarrier, a 21st null subcarrier, and a 24th null subcarrier.

13. Based on the fact that one or more DRUs include a 484-tone DRU, the 484-tone DRU is: The first 242-tone DRU and the second 242-tone DRU include subcarriers, The first 242-tone DRU and the third 242-tone DRU include subcarriers, or The method according to claim 12, comprising the second 242-tone DRU and the subcarriers contained in the third 242-tone DRU.

14. Based on the fact that the set of subcarrier indices included in each of the one or more DRUs for an x ​​MHz channel containing one 20 MHz channel within a y MHz bandwidth is denoted as S_x_y, The first S_80_160 = S_80_80 - ​​512, and The method according to claim 1, wherein the second S_80_160 = S_80_80 + 512.

15. The first S_80_240 = S_80_80 - ​​1024, The second S_80_240 = S_80_80, The third S_80_240 = S_80_80 + 1024. The method according to claim 14.

16. The first S_80_320 = the first S_80_160 - 1024, The second S_80_320 = the second S_80_160 - 1024, The third S_80_320 = the first S_80_160 + 1024, The fourth S_80_320 = the second S_80_160 + 1024. The method according to claim 15.

17. The first S_80_480 = the first S_80_160 - 2048, The second S_80_480 = the second S_80_160 - 2048, The third S_80_480 = the first S_80_160, The fourth S_80_480 = the second S_80_160, The fifth S_80_480 = the first S_80_160 + 2048, The sixth S_80_480 = the second S_80_160 + 2048. The method according to claim 16.

18. The first S_80_640 = the first S_80_320 - 2048, The second S_80_640 = the second S_80_320 - 2048, The third S_80_640 = the third S_80_320 - 2048, The fourth S_80_640 = the fourth S_80_320 - 2048, The fifth S_80_640 = the first S_80_320 + 2048, The sixth S_80_640 = the second S_80_320 + 2048, The seventh S_80_640 = the third S_80_320 + 2048, The eighth S_80_640 = the fourth S_80_320 + 2048. The method according to claim 17.

19. Based on the resource unit (RU) allocation information included in the PPDU, one or more DRUs are instructed, or The method according to claim 1, wherein one or more DRUs are designated based on RU assignment information included in a trigger frame that triggers the transmission of the PPDU.

20. The method according to claim 1, wherein the PPDU is a downlink PPDU or an uplink TB (trigger-based) PPDU.

21. The method according to claim 1, wherein the one or more fields include data fields.

22. A first station (STA) device in a wireless local area network (WLAN) system, One or more transceivers, The system comprises one or more processors connected to one or more of the aforementioned transceivers, The one or more processors described above are: Generate a PPDU (physical layer protocol data unit) containing one or more fields; and The one or more fields are mapped onto one or more DRUs (distributed resource units), Based on the application of preamble puncturing to any one of the four 20 MHz channels in a bandwidth including an 80 MHz channel, the PPDU is transmitted to one or more second STAs via one or more transceivers on the remaining 60 MHz channels excluding the one 20 MHz channel; Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, The device is defined as having n-th (n = 1, 2, ..., 27) 26-tone DRUs, each containing the nth lowest subcarrier among the available subcarriers in the 60 MHz channel, as every 27th subcarrier.

23. A method performed by a second station (STA) in a wireless local area network (WLAN) system, The steps include: receiving a PPDU (physical layer protocol data unit) containing one or more fields from a first STA on the remaining 60 MHz channels, excluding the one 20 MHz channel, based on the application of preamble puncturing to any one of four 20 MHz channels in a bandwidth including an 80 MHz channel; and The process includes: decoding one or more fields mapped onto one or more DRUs (distributed resource units); Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, A method in which the nth (n=1, 2, ..., 27) 26-tone DRU is defined as every 27th subcarrier, which includes the nth lowest subcarrier among the available subcarriers in the 60 MHz channel.

24. A second station (STA) device in a wireless local area network (WLAN) system, One or more transceivers, The system comprises one or more processors connected to one or more of the aforementioned transceivers, The one or more processors described above are: Based on the application of preamble puncturing to any one of the four 20 MHz channels in a bandwidth including an 80 MHz channel, one or more transceivers receive a PPDU (physical layer protocol data unit) containing one or more fields on the remaining 60 MHz channels excluding the one 20 MHz channel from the first STA; and Configured to decode one or more fields mapped onto one or more DRUs (distributed resource units); Based on the fact that one or more DRUs include a 26-tone DRU, the 26-tone DRU is one of 27 predefined 26-tone DRUs, The device is defined as having n-th (n = 1, 2, ..., 27) 26-tone DRUs, each containing the nth lowest subcarrier among the available subcarriers in the 60 MHz channel, as every 27th subcarrier.

25. A processing device configured to control a station (STA) in a wireless local area network (WLAN) system, One or more processors, A processing device comprising: one or more computer memories operably connected to one or more processors, which store instructions for performing the method according to any one of claims 1 to 21, based on that they are executed by the one or more processors.

26. One or more non-transitory computer-readable media for storing one or more instructions, A computer-readable medium in which the one or more instructions are executed by one or more processors and which controls a device in a wireless LAN system to perform the method according to any one of claims 1 to 21.

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