Method and apparatus for allocating resources to a STA operating only at 20MHz in a wireless LAN system by limiting RU and MRU.

Abstract

A method and apparatus for setting limited RUs and MRUs in a wireless LAN system are proposed. [Solution] The receiving STA receives the PPDU from the transmitting STA via a pre-configured frequency band and decodes the PPDU. The receiving STA is an STA that operates only in the 20MHz band. The PPDU includes a preamble and a data field. The data field is received in the pre-configured frequency band, excluding the first RU and first MRU resources.

Description

Technical Field

[0001] This specification relates to a technique for restricting and allocating resources in a wireless LAN system, and more specifically, to a method and apparatus for restricting and allocating resources by restricting RUs and MRUs for a STA that operates only at 20 MHz.

Background Art

[0002] WLAN (wireless local area network) has been improved in various ways. For example, the IEEE802.11ax standard proposed an improved communication environment using OFDMA (orthogonal frequency division multiple access) and DL MU MIMO (downlink multi-user multiple input, multiple output) technologies.

[0003] This specification proposes technical features that can be utilized in new communication standards. For example, the new communication standard is the recently discussed EHT (Extreme high throughput) standard. The EHT standard can use newly proposed increased bandwidth, improved PPDU (PHY layer protocol data unit) structure, improved sequence, HARQ (Hybrid automatic repeat request) technology, etc. The EHT standard can be called the IEEE802.11be standard.

[0004] In the new wireless LAN standard, an increased number of spatial streams are used. In this case, it is necessary to improve the signaling technology in the wireless LAN system in order to appropriately use the increased number of spatial streams.

Summary of the Invention

Problems to be Solved by the Invention

[0005] This specification proposes a method and apparatus for allocating resources to a STA operating only at 20 MHz in a wireless LAN system by limiting RU and MRU. [Means for solving the problem]

[0006] One example in this specification proposes a method for allocating resources by limiting RU and MRU for an STA that operates only at 20MHz.

[0007] This embodiment can be implemented in a network environment that supports a next-generation wireless LAN system (IEEE 802.11be or EHT wireless LAN system). The next-generation wireless LAN system is an improved version of the 802.11ax system and can be backward compatible with the 802.11ax system.

[0008] This embodiment is implemented in a receiving STA (station), and the receiving STA can support a non-AP STA that operates only in the 20MHz band. The transmitting STA can support an AP (access point) STA.

[0009] This embodiment proposes a method for setting RUs and MRUs that cannot be assigned (or have their assignment restricted) to STAs that operate only in the 20MHz band, taking into account the newly defined 80MHz band tone plan in an 802.11be wireless LAN system.

[0010] The receiving STA (station) receives the PPDU (Physical Protocol Data Unit) from the transmitting STA via a pre-configured frequency band.

[0011] The receiving STA decodes the PPDU.

[0012] The aforementioned receiving STA is an STA that operates only in the 20MHz bandwidth.

[0013] The PPDU includes a preamble and a data field. The data field is received in the resources of the already configured frequency band, excluding the first RU (Resource Unit) and the first MRU (Multiple RUs). The first MRU is newly defined in the 802.11be wireless LAN system as a multiple RU in which two RUs are aggregated.

[0014] If the previously set frequency band is a 40MHz band, the RU arrangement (or tone plan) for the 40MHz band is as follows. The tone plan for the 40MHz band is the same for both 802.11ax and 802.11be wireless LAN systems.

[0015] If the 40MHz band consists only of 26 tone RUs, the 40MHz band includes the first to the 18th set of 26 tone RUs. If the 40MHz band consists only of 52 tone RUs, the 40MHz band includes the first to the 8th set of 52 tone RUs. If the 40MHz band consists only of 106 tone RUs, the 40MHz band includes the first to the 4th set of 106 tone RUs. If the 40MHz band consists only of 242 tone RUs, the 40MHz band includes the first and second sets of 242 tone RUs.

[0016] In this case, the first to 18th 26-tone RUs are arranged in order from the lowest frequency 26-tone RUs to the highest frequency 26-tone RUs. The first to 8th 52-tone RUs are arranged in order from the lowest frequency 52-tone RUs to the highest frequency 52-tone RUs. The first to 4th 106-tone RUs are arranged in order from the lowest frequency 106-tone RUs to the highest frequency 106-tone RUs. The first and second 242-tone RUs are arranged in order from the lowest frequency 242-tone RUs to the highest frequency 242-tone RUs.

[0017] The first RU includes the fifth and fourteenth 26-tone RUs and the first and second 242-tone RUs. That is, the fifth and fourteenth 26-tone RUs and the first and second 242-tone RUs are resources that are not allocated to the receiving STA.

[0018] The first MRU includes an aggregated MRU of the fifth 26-tone RU and the second 52-tone RU, an aggregated MRU of the fourteenth 26-tone RU and the sixth 52-tone RU, an aggregated MRU of the fifth 26-tone RU and the first 106-tone RU, an aggregated MRU of the fifth 26-tone RU and the second 106-tone RU, an aggregated MRU of the fourteenth 26-tone RU and the third 106-tone RU, and an aggregated MRU of the fourteenth 26-tone RU and the fourth 106-tone RU. In other words, the multiplexed RUs included in the first MRU also constitute resources that are not allocated to the receiving STA.

[0019] This embodiment proposes a method in which, when the receiving STA, which operates only in the 20 MHz band, receives an OFDMA PPDU via the 40 MHz band, the receiving STA is allocated only to the remaining resource units, excluding the first RU and the first MRU. [Effects of the Invention]

[0020] According to the embodiments proposed herein, a new effect is achieved in which performance degradation and interference to adjacent channels can be prevented by preventing data from being superimposed on tones corresponding to DC tones and guard tones in the 20 MHz band on which the receiving STA can operate. This also has the effect of increasing the overall throughput of an STA that operates only at 20 MHz. [Brief explanation of the drawing]

[0021] [Figure 1] An example of a transmitting and / or receiving device as described herein is shown. [Figure 2]It is a conceptual diagram showing the structure of a wireless LAN (WLAN). [Figure 3] It is a drawing explaining the normal link setup process. [Figure 4] It is a drawing showing an example of a PPDU used in the IEEE standard. [Figure 5] It is a drawing showing the arrangement of resource units (RUs) used on the 20 MHz band. [Figure 6] It is a drawing showing the arrangement of resource units (RUs) used on the 40 MHz band. [Figure 7] It is a drawing showing the arrangement of resource units (RUs) used on the 80 MHz band. [Figure 8] It shows the structure of the HE-SIG-B field. [Figure 9] It shows an example in which multiple User STAs are assigned to the same RU via the MU-MIMO technology. [Figure 10] It shows an example of a PPDU used in this specification. [Figure 11] It shows a modified example of the transmission device and / or reception device of this specification. [Figure 12] It shows the tone plan for the 80 MHz PPDU of the 802.11be wireless LAN system. [Figure 13] It shows an example of an RU that is not assigned to 20 MHz only or an operating STA in 40 MHz PPDU transmission. [Figure 14] It shows an example of 26+52 tone MRUs and 26+106 tone MRUs used for 20 MHz EHT PPDU OFDMA transmission. [Figure 15] It shows an example of 26+52 tone MRUs and 26+106 tone MRUs used for 4 MHz EHT PPDU OFDMA transmission. [Figure 16] It shows an example of 26+52 tone MRUs used for 80 MHz EHT PPDU OFDMA transmission. [Figure 17]An example of a 26+106 tone MRU used in 80MHz EHT PPDU OFDMA transmission is shown. [Figure 18] This is a procedure flowchart illustrating the operation of the transmitting device according to this embodiment. [Figure 19] This is a procedure flowchart illustrating the operation of the receiving device according to this embodiment. [Figure 20] This flowchart illustrates the procedure for limiting and allocating RU or MRU to an STA that operates only in the 20MHz bandwidth using the AP according to this embodiment. [Figure 21] This flowchart illustrates the procedure for assigning an STA that operates only in the 20MHz bandwidth according to this embodiment, with limitations on RU or MRU. [Modes for carrying out the invention]

[0022] In this specification, "A or B" may mean "just A," "just B," or "both A and B." Furthermore, in this specification, "A or B" may be interpreted as "A and / or B." For example, in this specification, "A, B or C" may mean "just A," "just B," "just C," or "any combination of A, B and C."

[0023] In this specification, slashes ( / ) and commas can mean "and / or". For example, "A / B" can mean "A and / or B". Thus, "A / B" can mean "just A", "just B", or "both A and B". For example, "A, B, C" can mean "A, B or C".

[0024] In this specification, "at least one of A and B" can mean "just A," "just B," or "both A and B." Furthermore, in this specification, the expressions "at least one of A or B" and "at least one of A and / or B" can be interpreted in the same way as "at least one of A and B."

[0025] Furthermore, in this specification, "at least one of A, B and C" may mean "just A," "just B," "just C," or "any combination of A, B and C." Also, "at least one of A, B or C" or "at least one of A, B and / or C" may mean "at least one of A, B and C."

[0026] Furthermore, parentheses used in this specification can mean "for example." Specifically, when "control information (PDCCH)" is shown, "PDCCH" is proposed as an example of "control information." Also, "control information" in this specification is not limited to "PDCCH," and "PDDCH" is proposed as an example of "control information." Furthermore, when "control information (i.e., PDCCH)" is shown, "PDCCH" is proposed as an example of "control information."

[0027] In this specification, technical features described individually within a single drawing may be represented individually or simultaneously.

[0028] The following examples in this specification apply to various wireless communication systems. For example, the following examples in this specification apply to wireless LAN (wireless local area network, WLAN) systems. For example, this specification applies to the IEEE 802.11a / g / n / ac standards and the IEEE 802.11ax standard. This specification also applies to newly proposed EHT standards or IEEE 802.11be standards. Furthermore, the examples in this specification also apply to new wireless LAN standards that improve upon the EHT standards or IEEE 802.11be. In addition, the examples in this specification apply to mobile communication systems. For example, this applies to mobile communication systems based on LTE (Long Term Evolution) and its evolution based on 3GPP (3rd Generation Partnership Project) (registered trademark) standards. Furthermore, the examples in this specification apply to 5GNR standard communication systems based on 3GPP standards.

[0029] The following describes the technical features to which this specification applies in order to explain the technical features of this specification.

[0030] Figure 1 shows an example of a transmitting and / or receiving device as described herein.

[0031] An example in Figure 1 can perform various technical features described below. Figure 1 relates to at least one STA (station). For example, STA (110, 120) in this specification is referred to by various names such as mobile terminal, wireless device, Wireless Transmit / Receive Unit (WTRU), User Equipment (UE), Mobile Station (MS), Mobile Subscriber Unit, or simply user. STA (110, 120) in this specification is referred to by various names such as network, base station, node-B, access point (AP), repeater, router, relay. STA (110, 120) in this specification is referred to by various names such as receiving device, transmitting device, receiving STA, transmitting STA, receiving device, transmitting device.

[0032] For example, an STA(110, 120) can perform either an AP (Access Point) role or a non-AP role. That is, an STA(110, 120) as described herein can perform AP and / or non-AP functions. In this specification, AP may also be referred to as AP STA.

[0033] The STA(110, 120) described herein can support various communication standards other than the IEEE 802.11 standard. For example, it can support communication standards related to 3GPP standards (e.g., LTE, LTE-A, 5GNR standards). Furthermore, the STA described herein can be implemented in various devices such as mobile phones, vehicles, and personal computers. In addition, the STA described herein can support communication for various communication services such as voice calls, video calls, data communication, and autonomous driving.

[0034] In this specification, STA(110, 120) may include medium access control (MAC) and a physical layer interface to the wireless medium in accordance with the IEEE 802.11 standard.

[0035] Based on Figure 1(a), STA(110, 120) can be explained as follows.

[0036] The first STA(110) includes a processor (111), memory (112), and transceiver (113). The indicated processor, memory, and transceiver may each be implemented as separate chips, or at least two or more blocks / functions may be implemented via a single chip.

[0037] The transceiver (113) of the first STA performs signal transmission and reception operations. Specifically, it can transmit and receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be, etc.).

[0038] For example, the first STA (110) can perform the intended operation of the AP. For example, the AP's processor (111) can receive signals via the transceiver (113), process the received signals, generate transmit signals, and perform control for signal transmission. The AP's memory (112) can store signals received via the transceiver (113) (i.e., received signals) and signals transmitted via the transceiver (i.e., transmitted signals).

[0039] For example, the second STA (120) can perform the intended operation of a Non-AP STA. For example, a non-AP transceiver (123) can perform signal transmission and reception operations. Specifically, it can transmit and receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be, etc.).

[0040] For example, the Non-AP STA processor (121) can receive signals via the transceiver (123), process the received signals, generate transmit signals, and perform control for signal transmission. The Non-AP STA memory (122) can store signals received via the transceiver (123) (i.e., received signals) and signals transmitted via the transceiver (i.e., transmitted signals).

[0041] For example, in the following specification, the operation of the device indicated as AP is performed in the first STA(110) or the second STA(120). For example, if the first STA(110) is AP, the operation of the device indicated as AP is controlled by the processor(111) of the first STA(110), and the relevant signals are transmitted or received via a transceiver(113) controlled by the processor(111) of the first STA(110). In addition, control information related to the operation of AP and the AP's transmit / receive signals are stored in the memory(112) of the first STA(110). In addition, if the second STA(110) is AP, the operation of the device indicated as AP is controlled by the processor(121) of the second STA(120), and the relevant signals are transmitted or received via a transceiver(123) controlled by the processor(121) of the second STA(120). In addition, control information related to the operation of AP and the AP's transmit / receive signals are stored in the memory(122) of the second STA(110).

[0042] For example, in the following specification, the operation of a device indicated as non-AP (or User-STA) is performed in the first STA (110) or the second STA (120). For example, if the second STA (120) is non-AP, the operation of the device indicated as non-AP is controlled by the processor (121) of the second STA (120), and the relevant signals are transmitted or received via a transceiver (123) controlled by the processor (121) of the second STA (120). In addition, control information related to the operation of non-AP and AP transmit / receive signals are stored in the memory (122) of the second STA (120). For example, if the first STA (110) is non-AP, the operation of the device indicated as non-AP is controlled by the processor (111) of the first STA (110), and the relevant signals are transmitted or received via a transceiver (113) controlled by the processor (111) of the first STA (120). Furthermore, control information related to the operation of the non-AP and the AP's transmit / receive signals are stored in the memory (112) of the first STA (110).

[0043] In the following specification, devices referred to as (transmit / receive)STA, 1stSTA, 2ndSTA, STA1, STA2, AP, 1stAP, 2ndAP, AP1, AP2, (transmit / receive)Terminal, (transmit / receive)Device, (transmit / receive)apparatus, network, etc., mean the STA(110, 120) in Figure 1. For example, devices referred to as (transmit / receive)STA, 1stSTA, 2ndSTA, STA1, STA2, AP, 1stAP, 2ndAP, AP1, AP2, (transmit / receive)Terminal, (transmit / receive)Device, (transmit / receive)apparatus, network, etc., without specific designations, also mean the STA(110, 120) in Figure 1. For example, in the following example, the operation of various STAs sending and receiving signals (e.g., PPPDU) may be performed in the transceiver(113, 123) in Figure 1. Furthermore, in the following example, the operation of various STAs generating transmit / receive signals or performing data processing or calculations in advance for transmit / receive signals may be performed by the processor (111, 121) in Figure 1. For example, an example of the operation of generating transmit / receive signals or performing data processing or calculations in advance for transmit / receive signals may include: 1) the operation of determining / acquiring / composing / calculating / decoding / encoding bit information of subfields (SIG, STF, LTF, Data) contained within the PPDU; 2) the operation of determining / composing / acquiring time resources and frequency resources (e.g., subcarrier resources) used for subfields (SIG, STF, LTF, Data) contained within the PPDU; 3) the operation of determining / composing / acquiring specific sequences (e.g., pilot sequences, STF / LTF sequences, extra sequences applied to SIG) used for subfields (SIG, STF, LTF, Data) contained within the PPDU; 4) power control operations and / or power saving operations applied to the STA; and 5) operations related to determining / acquiring / composing / calculating / decoding / encoding ACK signals.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 related to fields / subfields / control fields / parameters / power, etc.) are stored in the memory (112, 122) in Figure 1.

[0044] The apparatus / STA shown in Figure 1(a) above is modified as shown in Figure 1(b). The STA(110, 120) described herein will be explained based on Figure 1(b) below.

[0045] For example, the transceivers (113, 123) shown in Figure 1(b) can perform the same functions as the transceivers shown in Figure 1(a) described above. For example, the processing chip (114, 124) shown in Figure 1(b) can include processors (111, 121) and memory (112, 122). The processors (111, 121) and memory (112, 122) shown in Figure 1(b) can perform the same functions as the processors (111, 121) and memory (112, 122) shown in Figure 1(a) described above.

[0046] In the following, mobile terminal, wireless device, wireless Transmit / Receive Unit (WTRU), User Equipment (UE), Mobile Station (MS), Mobile Subscriber Unit, user, user STA, network, base station, Node-B, access point (AP), repeater, router, relay, receiving device, transmitting device, receiving STA, transmitting STA, receiving device, transmitting device, receiving apparatus, and / or transmitting apparatus mean the STA (110, 120) shown in Figure 1(a) / (b) or the processing chip (114, 124) shown in Figure 1(b). That is, the technical features of this specification may be implemented on the STA (110, 120) shown in Figure 1(a) / (b) or only on the processing chip (114, 124) shown in Figure 1(b). For example, the technical characteristic of the transmitting STA transmitting control signals can be understood as the technical characteristic that the control signals generated in the processor (111, 121) shown in Figure 1(a) / (b) are transmitted via the transceivers (113, 123) shown in Figure 1(a) / (b). Alternatively, the technical characteristic of the transmitting STA transmitting control signals can be understood as the technical characteristic that the control signals to be transmitted to the transceivers (113, 123) are generated in the processing chip (114, 124) shown in Figure 1(b).

[0047] For example, the technical feature of a receiving STA receiving a control signal can be understood as the technical feature of the control signal being received by the transceiver (113, 123) shown in Figure 1(a). Alternatively, the technical feature of a receiving STA receiving a control signal can be understood as the technical feature of the control signal received by the transceiver (113, 123) shown in Figure 1(a) being acquired by the processor (111, 121) shown in Figure 1(a). Alternatively, the technical feature of a receiving STA receiving a control signal can be understood as the technical feature of the control signal received by the transceiver (113, 123) shown in Figure 1(b) being acquired by the processing chip (114, 124) shown in Figure 1(b).

[0048] Referring to Figure 1(b), the memory (112, 122) contains software code (115, 125). The software code (115, 125) contains instructions that control the operation of the processor (111, 121). The software code (115, 125) is contained in various programming languages.

[0049] The processors (111, 121) or processing chips (114, 124) shown in Figure 1 may include ASICs (application-specific integrated circuits), other chipsets, logic circuits, and / or data processing devices. The processor is an AP (application processor). For example, the processors (111, 121) or processing chips (114, 124) shown in Figure 1 may include at least one of the following: DSP (digital signal processor), CPU (central processing unit), GPU (graphics processing unit), or modem (modulator and demodulator). For example, the processors (111, 121) or processing chips (114, 124) shown in Figure 1 are manufactured by Qualcomm®. TMEXYNOS series processor, manufactured by Samsung®. TM Series processors, A-series processors manufactured by Apple®, HELIO manufactured by MediaTek® TM ATOM series processors, manufactured by INTEL®. TM This refers to a series processor or an improved (enhanced) version thereof.

[0050] In this specification, "uplink" refers to a link for communication from a non-AP STA to an AP STA, and uplink PPDU / packets / signals, etc., are transmitted via the uplink. Similarly, in this specification, "downlink" refers to a link for communication from an AP STA to a non-AP STA, and downlink PPDU / packets / signals, etc., are transmitted via the downlink.

[0051] Figure 2 is a conceptual diagram showing the structure of a wireless LAN (WLAN).

[0052] The upper part of Figure 2 shows the structure of the IEEE (Institute of Electrical and Electronic Engineers) 802.11 Infrastructure BSS (Basic Service Set).

[0053] Referring to the top of Figure 2, a wireless LAN system can include one or more infrastructure BSS(200, 205) (hereinafter, BSS). BSS(200, 205) is not a concept that refers to a specific area, but rather a set of APs (access points, 225) and STAs such as STA1 (Station, 200-1) that can synchronize and communicate with each other. A BSS(205) can include one or more connectable STAs (205-1, 205-2) in a single AP(230).

[0054] A BSS may include at least one STA, APs (225, 230) that provide distribution services, and a distribution system (DS, 210) that connects multiple APs.

[0055] The distribution system (210) can connect multiple BSSs (200, 205) to implement an extended service set (ESS, 240). ESS (240) is a term used to refer to a network formed by one or more APs connected via the distribution system (210). APs included in a single ESS (240) share the same SSID (service set identification).

[0056] The portal (portal,220) can act as a bridge to connect a wireless LAN network (IEEE802.11) with other networks (e.g., 802.X).

[0057] In a BSS like the one shown at the top of Figure 2, networks are implemented between APs (225, 230) and between APs (225, 230) and STAs (200-1, 205-1, 205-2). However, it is also possible to configure a network and communicate between STAs without APs (225, 230). A network that enables communication between STAs without APs (225, 230) is defined as an ad-hoc network or an independent BSS (independent basic service set, IBSS).

[0058] The lower part of Figure 2 is a conceptual diagram showing IBSS.

[0059] Referring to the bottom of Figure 2, IBSS is a BSS that operates in ad-hoc mode. Since IBSS does not include APs, there is no centralized management entity that performs management functions in a central location. That is, in IBSS, STAs (250-1, 250-2, 250-3, 255-4, 255-5) are managed in a distributed manner. In IBSS, all STAs (250-1, 250-2, 250-3, 255-4, 255-5) are configured as mobile STAs and are not allowed to connect to the distribution system, thus forming a self-contained network.

[0060] Figure 3 is a diagram illustrating the normal link setup process.

[0061] In the S310 step shown, the STA can perform an operation to find a network. The operation to find a network may include the STA's scanning operation. That is, in order for the STA to access a network, it needs to find a network that it can join. Before the STA can join a wireless network, it needs to identify compatible networks, and the process of identifying networks that exist in a particular area is called scanning. There are two scanning methods: active scanning and passive scanning.

[0062] Figure 3 illustrates the process of finding a network, including the active scanning process. In active scanning, the STA performing the scanning moves to a different channel and sends a probe request frame to search for nearby APs, and waits for a response. The responder sends a probe response frame to the STA that sent the probe request frame. Here, the responder is 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 return and send beacon frames, so the responder is not constant. For example, an STA that sent a probe request frame on channel 1 and received a probe response frame on channel 1 can store the BSS-related information contained in the received probe response frame and move to the next channel (e.g., channel 2) and perform scanning in the same way (i.e., sending and receiving probe requests / responses on channel 2).

[0063] Although not shown as an example in Figure 3, scanning operations can also be performed using the pass-sip scan method. An STA performing scanning based on pass-sip scans can wait for beacon frames while moving between channels. In IEEE 802.11, beacon frames are one of the management frames, used to announce the presence of a wireless network and are periodically transmitted to the scanning STA to find the wireless network and join it. In BSS, APs perform the role of periodically transmitting beacon frames, and in IBSS, STAs within IBSS return and transmit beacon frames. When a scanning STA receives a beacon frame, it stores the information about the BSS contained in the beacon frame and records the beacon frame information on each channel while moving to other channels. An STA that receives a beacon frame stores the BSS-related information contained in the received beacon frame and can move to the next channel and perform scanning on the next channel in the same way.

[0064] Once the STA discovers the network, it can perform an authentication process via step S320. This authentication process is referred to as the first authentication process to clearly distinguish it from the security configuration operation in step S340, which will be described later. The authentication process in S320 may include a process in which the STA sends an authentication request frame to the AP, and in response, the AP sends an authentication response frame to the STA. The authentication frame used in the authentication request / response corresponds to the management frame.

[0065] The authentication frame may include information such as the authentication algorithm number, authentication transaction sequence number, status code, challenge text, RSN (Robust Security Network), and finite cyclic group.

[0066] 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 grant authentication to the STA. The AP can provide the STA with the result of the authentication process via an authentication response frame.

[0067] A successfully authenticated STA can perform the connection process based on step S330. The connection process involves the STA sending an association request frame to the AP, and the AP sending an association response frame to the STA in response. For example, the association request frame may include information related to various capabilities, such as the listen interval, SSID (service set identifier), supported rates, supported channels, RSN, mobility domain, supported operating classes, Traffic Indication Map Broadcast request, and interworking service capabilities. For example, a connection response frame may include information related to various capabilities, such as status code, AID (Association ID), support rate, EDCA (Enhanced Distributed Channel Access) parameter set, RCPI (Received Channel Power Indicator), RSNI (Received Signal to Noise Indicator), mobility domain, timeout interval (association comeback time), overlapping BSS scan parameters, TIM broadcast response, and QoS map.

[0068] Thereafter, in step S340, the STA can execute the security configuration process. The security configuration process in step S340 may include, for example, a process of private key setup via a four-way handshake using an EAPOL (Extesible Authentication Protocol over LAN) frame.

[0069] Figure 4 is a diagram showing an example of a PPDU used in IEEE standards.

[0070] As shown, various forms of PPDU (PHY protocol data unit) are used in standards such as IEEEa / g / n / ac. Specifically, the LTF and STF fields contain training signals, SIG-A and SIG-B contain control information for the receiving station, and the data field contains user data corresponding to the PSDU (MAC PDU / Aggregated MAC PDU).

[0071] Figure 4 also includes an example of an HE PPDU according to the IEEE 802.11ax standard. The HE PPDU in Figure 4 is an example of a PPDU for multiple users, and HE-SIG-B is included only for multiple users; HE-SIG-B is omitted in PPDUs for single users.

[0072] As indicated, the HE-PPDU for Multiple User (MU) may include L-STF (legacy-short training field), L-LTF (legacy-long training field), L-SIG (legacy-signal), HE-SIG-A (high efficiency-signal A), HE-SIG-B (high efficiency-signal B), HE-STF (high efficiency-short training field), HE-LTF (high efficiency-long training field), data field (or MAC payload), and PE (Packet Extension) field. Each field is transmitted during the indicated time interval (i.e., 4 or 8 μs, etc.).

[0073] The resource unit (RU) used in PPDU is described below. A resource unit can contain multiple subcarriers (or tones). Resource units are used when transmitting signals to multiple STAs based on OFDMA technology. Resource units are also defined when transmitting signals to a single STA. Resource units are used for STF, LTF, data fields, etc.

[0074] Figure 5 is a diagram showing the arrangement of resource units (RUs) used in the 20MHz bandwidth.

[0075] As shown in Figure 5, Resource Units (RUs) corresponding to different numbers of tones (i.e., subcarriers) can be used to constitute some fields of the HE-PPDU. For example, resources are allocated in the units shown for the HE-STF, HE-LTF, and data fields.

[0076] As shown at the top of Figure 5, 26 units (i.e., units corresponding to 26 tones) are arranged. Six tones are used as guard bands in the leftmost band of the 20MHz bandwidth, and five tones are used as guard bands in the rightmost band of the 20MHz bandwidth. In addition, seven DC tones are 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, and 106 units are allocated to the other bands. Each unit is allocated for the receiving station, i.e., the user.

[0077] On the other hand, the RU configuration in Figure 5 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 5, in which case three DC tones are inserted.

[0078] As shown in the example in Figure 5, various sizes of RUs, namely 26RU, 52RU, 106RU, 242RU, etc., are proposed, the specific sizes of such RUs may be expanded or increased, so this embodiment is not limited to the specific size of each RU (i.e., the number of corresponding tones).

[0079] Figure 6 is a diagram showing the arrangement of resource units (RUs) used in the 40 MHz bandwidth.

[0080] Similar to how various sizes of RU were used in the example in Figure 5, the example in Figure 6 also uses 26RU, 52RU, 106RU, 242RU, 484RU, etc. In addition, five DC tones are inserted at the center frequency, twelve tones are used as guard bands in the leftmost band of the 40MHz bandwidth, and eleven tones are used as guard bands in the rightmost band of the 40MHz bandwidth.

[0081] Furthermore, as shown, 484 RUs can be used when used for a single user. On the other hand, the specific number of RUs can be changed, as in the example in Figure 4.

[0082] Figure 7 is a diagram showing the arrangement of resource units (RUs) used in the 80MHz bandwidth.

[0083] Similar to how various RU sizes were used in the examples in Figures 5 and 6, the example in Figure 7 can also use 26RU, 52RU, 106RU, 242RU, 484RU, 996RU, etc. Additionally, seven DC tones are inserted at the center frequency, 12 tones are used as guard bands in the leftmost band of the 80MHz bandwidth, and 11 tones are used as guard bands in the rightmost band of the 80MHz bandwidth. Furthermore, a 26RU configuration can be used, utilizing 13 tones on each side of the DC bandwidth.

[0084] Also, as shown, when used for a single user, the 996RU can be used, in which case five DC tones are inserted.

[0085] The RUs described herein are used in UL (Uplink) and DL (Downlink) communications. For example, when UL-MU communication is solicited by a trigger frame, the transmitting STA (e.g., AP) can assign a first RU (e.g., 26 / 52 / 106 / 242RU, etc.) to the first STA and a second RU (e.g., 26 / 52 / 106 / 242RU, etc.) to the second STA via the trigger frame. Thereafter, the first STA can transmit a first trigger-based PPDU based on the first RU, and the second STA can transmit a second trigger-based PPDU based on the second RU. The first and second trigger-based PPDUs are transmitted to the AP in the same time interval.

[0086] For example, when a DL MU PPDU is configured, the transmitting STA (e.g., AP) can assign the first RU (e.g., 26 / 52 / 106 / 242RU) to the first STA and the second RU (e.g., 26 / 52 / 106 / 242RU) to the second STA. That is, within a single MU PPDU, the transmitting STA (e.g., AP) can transmit the HE-STF, HE-LTF, and Data fields for the first STA via the first RU, and the HE-STF, HE-LTF, and Data fields for the second STA via the second RU.

[0087] Information regarding the RU's placement is signaled via HE-SIG-B.

[0088] Figure 8 shows the structure of the HE-SIG-B field.

[0089] As shown, the HE-SIG-B field (810) includes a common field (820) and a user-specific field (830). The common field (820) may contain information that applies in common to all users receiving the SIG-B (i.e., user STA). The user-specific field (830) can be called a user-specific control field. If the SIG-B is transmitted to multiple users, the user-specific field (830) may apply to only some of those users.

[0090] As shown in Figure 8, the common field (820) and the user-specific field (830) can be encoded separately.

[0091] The common field (820) can contain N*8 bits of RU allocation information. For example, the RU allocation information can contain information about the location of the RUs. For instance, if a 20MHz channel is used as shown in Figure 5, the RU allocation information can contain information about which RUs (26RU / 52RU / 106RU) are placed in which frequency band.

[0092] An example of a case where RU allocation information consists of 8 bits is as follows:

[0093] [Table 1]

[0094] As shown in the example in Figure 5, a maximum of nine 26RUs can be allocated to a 20MHz channel. When the RU allocation information for the common field (820) is set to "00000000" as shown in Table 1, nine 26RUs are allocated to the corresponding channel (i.e., 20MHz). Also, when the RU allocation information for the common field (820) is set to "00000001" as shown in Table 1, seven 26RUs and one 52RU are allocated to the corresponding channel. In other words, in the example in Figure 5, a 52RU is allocated on the far right, and seven 26RUs are allocated to its left.

[0095] Table 1 shows only a portion of the RU locations for which RU allocation information can be displayed.

[0096] For example, RU allocation information may further include the example shown in Table 2 below.

[0097] [Table 2]

[0098] "01000y2y1y0" relates to an example where 106RU is assigned to the leftmost end of a 20MHz channel, and five 26RU are assigned to its right. In this case, a large number of STAs (e.g., User-STAs) are assigned to the 106RU based on MU-MIMO technology. Specifically, up to eight STAs (e.g., User-STAs) are assigned to the 106RU, and the number of STAs (e.g., User-STAs) assigned to the 106RU is determined based on 3-bit information (y2y1y0). For example, if the 3-bit information (y2y1y0) is set to N, the number of STAs (e.g., User-STAs) assigned to the 106RU based on MU-MIMO technology is N+1.

[0099] Typically, multiple RUs are assigned multiple distinct STAs (e.g., User STAs). However, for a single RU exceeding a certain size (e.g., 10⁶ subcarriers), multiple STAs (e.g., User STAs) are assigned based on MU-MIMO technology.

[0100] As shown in Figure 8, a user-specific field (830) can contain multiple user fields. As described above, the number of STAs (e.g., User STAs) assigned to a particular channel is determined based on the RU allocation information in the common field (820). For example, if the RU allocation information in the common field (820) is "00000000", then one User STA is assigned to each of the nine 26RUs (i.e., a total of nine User STAs are assigned). In other words, a maximum of nine User STAs can be assigned to a particular channel via OFDMA technology. Also, a maximum of nine User STAs can be assigned to a particular channel via non-MU-MIMO technology.

[0101] For example, if the RU allocation is set to "01000y2y1y0", the 106 RU located on the far left will be allocated multiple User STAs via MU-MIMO technology, and the five 26 RU located to its right will be allocated five User STAs via non-MU-MIMO technology. This case is illustrated in the example shown in Figure 9.

[0102] Figure 9 shows an example where multiple User STAs are assigned to the same RU via MU-MIMO technology.

[0103] For example, if the RU allocation is set to "01000010" as shown in Figure 9, then, based on Table 2, 106 RUs are allocated to the leftmost end of a particular channel, and five 26 RUs are allocated to its right. Additionally, a total of three User STAs are allocated to the 106 RUs via MU-MIMO technology. As a result, a total of eight User STAs are allocated, allowing the HE-SIG-B user-specific field (830) to contain eight User fields.

[0104] The eight User fields are included in the order shown in Figure 9. Also, as shown in Figure 8, two User fields are implemented within one User block field.

[0105] The User fields shown in Figures 8 and 9 are constructed based on two formats. Specifically, User fields related to MU-MIMO technology are constructed using the first format, while User fields related to non-MU-MIMO technology are constructed using the second format. Referring to an example in Figure 9, User fields 1 through 3 are based on the first format, and User fields 4 through 8 are based on the second format. Either the first or second format can contain the same length (e.g., 21 bits) of bit information.

[0106] Each User field can have the same size (e.g., 21 bits). For example, the User field in the first format (MU-MIMO technology format) is structured as follows:

[0107] For example, the first bits (e.g., B0-B10) within the User field (i.e., 21 bits) can contain identification information for the User STA to which the User field is assigned (e.g., STA-ID, partial AID, etc.). Additionally, the second bits (e.g., B11-B14) within the User field (i.e., 21 bits) can contain information regarding the spatial configuration.

[0108] Furthermore, the third bit (i.e., B15-18) within the User field (i.e., 21 bits) can contain MCS (Modulation and Coding Scheme) information. The MCS information can be applied to the data field within the PPDU containing the SIG-B.

[0109] In this specification, MCS, MCS information, MCS index, MCS field, etc., can be represented by specific index values. For example, MCS information can be represented by index 0 to index 11. MCS information may include information about the constellation modulation type (e.g., BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, etc.) and information about the coding rate (e.g., 1 / 2, 2 / 3, 3 / 4, 5 / 6, etc.). MCS information may exclude information about the channel coding type (e.g., BCC or LDPC).

[0110] Additionally, the fourth bit (i.e., B19) within the User field (i.e., 21 bits) can be the Reserved field.

[0111] Furthermore, the fifth bit (i.e., B20) within the User field (i.e., 21 bits) can contain information about the coding type (e.g., BCC or LDPC). That is, the fifth bit (i.e., B20) can contain information about the type of channel coding (e.g., BCC or LDPC) applied to the data field in the PPDU containing the SIG-B.

[0112] The example above relates to the User field in the first format (the format for MU-MIMO technology). An example of the User field in the second format (the format for non-MU-MIMO technology) is as follows:

[0113] The first bit in the User field of the second format (e.g., B0-B10) can contain User STA identification information. The second bit in the User field of the second format (e.g., B11-B13) can contain information about the number of spatial streams applied to the RU. The third bit in the User field of the second format (e.g., B14) contains information about whether a beam forming steering matrix is ​​applied. The fourth bit in the User field of the second format (e.g., B15-B18) can contain MCS (Modulation and coding scheme) information. The fifth bit in the User field of the second format (e.g., B19) can contain information about whether DCM (Dual Carrier Modulation) is applied. The sixth bit in the User field of the second format (i.e., B20) can contain information about the coding type (e.g., BCC or LDPC).

[0114] The PPDUs transmitted / received in the STA of this specification are described below.

[0115] Figure 10 shows an example of a PPDU used in this specification.

[0116] The PPDU in Figure 10 is referred to by various names such as EHT PPDU, transmit PPDU, receive PPDU, first type, or nth type PPDU. For example, in this specification, PPDU or EHT PPDU is referred to by various names such as transmit PPDU, receive PPDU, first type, or nth type PPDU. Furthermore, the EHT PPU is used in EHT systems and / or new wireless LAN systems that improve upon the EHT system.

[0117] The PPDU in Figure 10 can represent some or all of the PPDU types used in an EHT system. For example, the example in Figure 10 can be used for both SU (single-user) mode and MU (multi-user) mode. In other words, the PPDU in Figure 10 can be for one receiving STA or multiple receiving STAs. When the PPDU in Figure 10 is used for TB (Trigger-based) mode, the EHT-SIG in Figure 10 can be omitted. In other words, an STA that has received a trigger frame for UL-MU (Uplink-MU) communication can transmit a PPDU in the example in Figure 10 with the EHT-SIG omitted.

[0118] In Figure 10, the transition from L-STF to EHT-LTF can be called a preamble or physical preamble, and it is generated / transmitted / received / acquired / decoded in the physical layer.

[0119] In Figure 10, the subcarrier spacing for the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields is set to 312.5 kHz, while the subcarrier spacing for the EHT-STF, EHT-LTF, and Data fields is set to 78.125 kHz. That is, the tone index (or subcarrier index) for the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields can be displayed in 312.5 kHz units, and the tone index (or subcarrier index) for the EHT-STF, EHT-LTF, and Data fields can be displayed in 78.125 kHz units.

[0120] The PPDUs in Figure 10, specifically L-LTF and L-STF, may be the same as those in conventional fields.

[0121] The L-SIG field in Figure 10 can contain, for example, 24 bits of bit information. For example, the 24 bits of information can include a 4-bit Rate field, a 1-bit Reserved bit, a 12-bit Length field, a 1-bit Parity bit, and a 6-bit Tail bit. For example, the 12-bit Length field can contain information about the length or time duration of the PPDU. For example, the value of the 12-bit Length field is determined based on the type of PPDU. For example, if the PPDU is a non-HT, HT, VHT PPDU or an EHT PPDU, the value of the Length field is determined to be a multiple of 3. For example, if the PPDU is an HE PPDU, the value of the Length field is determined to be a multiple of 3 + 1 or a multiple of 3 + 2. In other words, for non-HT, HT, VHT PPDUs or EHT PPDUs, the value of the Length field can be a multiple of 3, and for HE PPDUs, the value of the Length field is determined to be a multiple of 3 + 1 or a multiple of 3 + 2.

[0122] For example, the transmitting STA can apply a BCC coding based on a code rate of 1 / 2 to the 24 bits of information in the L-SIG field. Subsequently, the transmitting STA can obtain 48 bits of BCC coding. BPSK modulation is applied to the 48 bits of coding, generating 48 BPSK symbols. The transmitting STA can map the 48 BPSK symbols to positions excluding the pilot subcarrier {subcarrier indices -21, -7, +7, +21} and the DC subcarrier {subcarrier index 0}. As a result, the 48 BPSK symbols are mapped to subcarrier indices -26 to -22, -20 to -8, -6 to -1, +1 to +6, +8 to +20, and +22 to +26. The transmitting STA can further map the {-1, -1, -1, 1} signal to subcarrier indices {-28, -27, +27, 28}. The above signal is used for channel estimation for the frequency domain corresponding to {-28, -27, +27, 28}.

[0123] The transmitting STA can generate an RL-SIG, just like the L-SIG. BPSK modulation is applied to the RL-SIG. Based on the presence of the RL-SIG, the receiving STA can determine that the received PPDU is either an HE PPDU or an EHT PPDU.

[0124] From RL-SIG onwards in Figure 10, U-SIGs (Universal SIGs) can be inserted. U-SIGs can be referred to by various names such as the first SIG field, first SIG, first type SIG, control signal, control signal field, and first (type) control signal.

[0125] A U-SIG can contain N bits of information and may include information to identify the type of EHT PPDU. For example, a U-SIG is composed of two symbols (e.g., two consecutive OFDM symbols). Each symbol for the U-SIG (e.g., an OFDM symbol) can have a duration of 4us. Each symbol of the U-SIG is used to transmit 26 bits of information. For example, each symbol of the U-SIG is transmitted and received based on 52 data tones and 4 pilot tones.

[0126] For example, A-bit information (e.g., 52 uncoded bits) can be transmitted via a U-SIG (or U-SIG field). The first symbol of the U-SIG can transmit the first X bits of the total A-bit information (e.g., 26 uncoded bits), and the second symbol of the U-SIG can transmit the remaining Y bits of the total A-bit information (e.g., 26 uncoded bits). For example, a transmitting STA can obtain the 26 uncoded bits contained in each U-SIG symbol. The transmitting STA can perform convolutional encoding (i.e., coding as BCC) based on a rate of R=1 / 2 to generate 52-coded bits and perform interleaving on the 52-coded bits. The transmitting STA can perform BPSK modulation on the interleaved 52-coded bits to generate 52 BPSK symbols to be assigned to each U-SIG symbol. A single U-SIG symbol is transmitted based on 56 tones (subcarriers) from subcarrier index -28 to subcarrier index +28, excluding DC index 0. The 52 BPSK symbols generated by the transmitting STA are transmitted based on the remaining tones (subcarriers), excluding the pilot tones -21, -7, +7, and +21.

[0127] For example, the A-bit information (e.g., 52 uncoded bits) transmitted by the U-SIG may include a CRC field (e.g., a 4-bit field) and a tail field (e.g., a 6-bit field). The CRC field and tail field are transmitted via a second symbol of the U-SIG. The CRC field is generated based on the 26 bits assigned to the first symbol of the U-SIG and the remaining 16 bits in the second symbol excluding the CRC / tail field, and is generated based on a conventional CRC calculation algorithm. The tail field is used to terminate the trellis of the convolutional decoder and is set, for example, to "".

[0128] The A-bit information (e.g., 52 uncoded bits) transmitted by a U-SIG (or U-SIG field) can be divided into version-independent bits and version-dependent bits. For example, the size of the version-independent bits can be fixed or variable. For example, the version-independent bits may be assigned only to the first symbol of the U-SIG, or they may be assigned to both the first and second symbols of the U-SIG. For example, the version-independent bits and version-dependent bits may be referred to by various names such as the first control bits and the second control bits.

[0129] For example, the version-independent bits of the U-SIG can contain a 3-bit PHY version identifier. For example, the 3-bit PHY version identifier can contain information related to the PHY version of the transmitted and received PPDUs. For example, the first value of the 3-bit PHY version identifier can indicate that the transmitted and received PPDUs are EHT PPDUs. In other words, if a transmitting STA is transmitting an EHT PPDU, it can set the 3-bit PHY version identifier as the first value. To put it another way, a receiving STA can determine that the received PPDU is an EHT PPDU based on the PHY version identifier with the first value.

[0130] For example, the version-independent bits of a U-SIG may include a 1-bit UL / DL flag field. The first value of the 1-bit UL / DL flag field is associated with UL communication, and the second value of the UL / DL flag field is associated with DL communication.

[0131] For example, the version-independent bits of the U-SIG can contain information about the length of the TXOP and information about the BSS color ID.

[0132] For example, if EHT PPDUs are categorized into various types (e.g., EHT PPDUs related to SU mode, EHT PPDUs related to MU mode, EHT PPDUs related to TB mode, EHT PPDUs related to Extended Range transmission, etc.), then information regarding the type of EHT PPDU is included in the version-dependent bits of the U-SIG.

[0133] For example, a U-SIG may include information about: 1) a bandwidth field containing information about the bandwidth; 2) a field containing information about the MCS technology applied to the EHT-SIG; 3) an indicator field containing information related to whether or not dual subcarrier modulation (DCM) technology is applied to the EHT-SIG; 4) a field containing information about the number of symbols used for the EHT-SIG; 5) a field containing information about whether or not the EHT-SIG is generated across the entire bandwidth; 6) a field containing information about the type of EHT-LTF / STF; and 7) fields indicating the length of the EHT-LTF and the length of the CP.

[0134] Preamble puncturing is applied to the PPDU in Figure 10. Preamble puncturing means applying puncturing to a portion of the PPDU's total bandwidth (for example, a secondary 20MHz bandwidth). For example, if an 80MHz PPDU is transmitted, the STA will apply puncturing to the secondary 20MHz bandwidth of the 80MHz band, allowing the PPDU to be transmitted only through the primary 20MHz bandwidth and the secondary 40MHz bandwidth.

[0135] For example, preamble puncturing patterns are pre-configured. For example, if the first puncturing pattern is applied, puncturing is applied only to the Secondary 20MHz band within the 80MHz band. For example, if the second puncturing pattern is applied, puncturing is applied to only one of the two Secondary 20MHz bands included in the Secondary 40MHz band within the 80MHz band. For example, if the third puncturing pattern is applied, puncturing is applied only to the Secondary 20MHz band included in the Primary 80MHz band within the 160MHz band (or 80+80MHz band). For example, if the fourth puncturing pattern is applied, puncturing is applied to at least one 20MHz channel that is present and does not belong to the Primary 40MHz band, which is included in the Primary 80MHz band within the 160MHz band (or 80+80MHz band).

[0136] Information regarding preamble puncturing applied to the PPDU is included in the U-SIG and / or EHT-SIG. For example, the first field of the U-SIG may contain information regarding the contiguous bandwidth of the PPDU, and the second field of the U-SIG may contain information regarding preamble puncturing applied to the PPDU.

[0137] For example, U-SIGs and EHT-SIGs may include information about preamble puncturing based on the following method: If the bandwidth of the PPDU exceeds 80 MHz, the U-SIGs are configured individually in 80 MHz units. For example, if the bandwidth of the PPDU is 160 MHz, the PPDU includes a first U-SIG for the first 80 MHz band and a second U-SIG for the second 80 MHz band. In this case, the first field of the first U-SIG may include information about the 160 MHz bandwidth, and the second field of the first U-SIG may include information about preamble puncturing applied to the first 80 MHz band (i.e., information about the preamble puncturing pattern). Also, the first field of the second U-SIG may include information about the 160 MHz bandwidth, and the second field of the second U-SIG may include information about preamble puncturing applied to the second 80 MHz band (i.e., information about the preamble puncturing pattern). On the other hand, an EHT-SIG consecutive to the first U-SIG may contain information about preamble puncturing applied to the second 80 MHz band (i.e., information about the preamble puncturing pattern), and an EHT-SIG consecutive to the second U-SIG may contain information about preamble puncturing applied to the first 80 MHz band (i.e., information about the preamble puncturing pattern).

[0138] Furthermore, or alternatively, U-SIG and EHT-SIG may include information on preamble puncturing based on the following methods: U-SIG may include information on preamble puncturing for all bandwidths (i.e., information on preamble puncturing patterns); EHT-SIG may not include information on preamble puncturing, and only U-SIG may include information on preamble puncturing (i.e., information on preamble puncturing patterns).

[0139] U-SIGs are configured in 20MHz units. For example, when an 80MHz PPDU is configured, the U-SIGs are duplicated; that is, the 80MHz PPDU contains four identical U-SIGs. PPDUs with a bandwidth exceeding 80MHz can contain separate U-SIGs from each other.

[0140] The EHT-SIG in Figure 10 may contain control information for the receiving STA. The EHT-SIG is transmitted via at least one symbol, which may have a length of 4us. Information regarding the number of symbols used for the EHT-SIG is included in the U-SIG.

[0141] EHT-SIG may include the technical features of HE-SIG-B as described in Figures 8 and 9. For example, EHT-SIG may include common fields and user-specific fields, similar to the example in Figure 8. Common fields in EHT-SIG are optional, and the number of user-specific fields is determined based on the number of users.

[0142] Similar to the example in Figure 8, the common fields and user-specific fields of the EHT-SIG are coded separately. One user block field contained within a user-specific field can contain information for two users, but the last user block field contained within a user-specific field can contain information for one user. In other words, one user block field in the EHT-SIG can contain a maximum of two user fields. Similar to the example in Figure 9, each user field is either related to MU-MIMO assignment or non-MU-MIMO assignment.

[0143] Similar to the example in Figure 8, the common field of the EHT-SIG can include a CRC bit and a Tail bit. The length of the CRC bit can be determined by 4 bits, and the length of the Tail bit can be determined by 6 bits and set to "000000".

[0144] Similar to the example in Figure 8, the common field of the EHT-SIG can include RU allocation information. RU allocation information refers to information about the location of RUs to which multiple users (i.e., multiple receiving STAs) are allocated. As with Table 1, RU allocation information is composed of 8-bit (or N-bit) units.

[0145] A mode that omits the common field of the EHT-SIG is supported. This mode can be called compressed mode. When compressed mode is used, multiple users of the EHT PPDU (i.e., multiple receiving STAs) can decode the PPDU (e.g., the PPDU's data field) based on non-OFDMA. That is, multiple users of the EHT PPDU can decode the PPDU (e.g., the PPDU's data field) received over the same frequency band. On the other hand, when non-compressed mode is used, multiple users of the EHT PPDU can decode the PPDU (e.g., the PPDU's data field) based on OFDMA. That is, multiple users of the EHT PPDU can receive the PPDU (e.g., the PPDU's data field) over different frequency bands.

[0146] The EHT-SIG is constructed based on various MCS technologies. As mentioned above, information related to the MCS technology applied to the EHT-SIG is included in the U-SIG. The EHT-SIG is constructed based on DCM technology. For example, of the N data tones allocated for the EHT-SIG (e.g., 52 data tones), the first modulation technique is applied to half of the consecutive tones, and the second modulation technique is applied to the remaining half of the consecutive tones. That is, the transmitting STA can modulate specific control information to a first symbol based on the first modulation technique and assign it to half of the consecutive tones, and modulate the same control information to a second symbol based on the second modulation technique and assign it to the remaining half of the consecutive tones. As mentioned above, information related to whether or not DCM technology is applied to the EHT-SIG (e.g., a 1-bit field) is included in the U-SIG. The EHT-STF in Figure 10 is used to improve automatic gain control estimation in a MIMO (multiple input multiple output) environment or an OFDMA environment. The EHT-LTF in Figure 10 is used to estimate the channel in a MIMO environment or an OFDMA environment.

[0147] Information regarding the type of STF and / or LTF (including information regarding GI applicable to the LTF) is included in the SIGA field and / or SIGB field in Figure 10, etc.

[0148] The PPDU in Figure 10 (i.e., EHT-PPDU) is constructed based on the examples in Figures 5 and 6.

[0149] For example, an EHT PPDU transmitted over a 20MHz bandwidth, i.e., a 20MHz EHT PPDU, is constructed based on the RUs shown in Figure 5. That is, the locations of the RUs for the EHT-STF, EHT-LTF, and data fields included in the EHT PPDU are determined as shown in Figure 5.

[0150] An EHT PPDU transmitted over the 40MHz bandwidth, i.e., a 40MHz EHT PPDU, is constructed based on the RUs shown in Figure 6. That is, the location of the RUs for the EHT-STF, EHT-LTF, and data field included in the EHT PPDU is determined as shown in Figure 6.

[0151] Since the RU position in Figure 6 corresponds to 40MHz, repeating the pattern in Figure 6 twice determines the tone plan for 80MHz. In other words, the 80MHz EHT PPDU is transmitted based on a new tone plan in which the RU in Figure 6 (which is not the RU in Figure 7) is repeated twice.

[0152] If the pattern in Figure 6 is repeated twice, the DC region will consist of 23 tones (i.e., 11 guard tones + 12 guard tones). In other words, a tone plan for an 80MHz EHT PPDU allocated based on OFDMA can have 23 DC tones. In contrast, an 80MHz EHT PPDU allocated based on Non-OFDMA (i.e., a non-OFDMA fullband width 80MHz PPDU) can be configured based on 996RU and may include 5 DC tones, 12 left guard tones, and 11 right guard tones.

[0153] The tone plan for 160 / 240 / 320MHz consists of several repetitions of the pattern shown in Figure 6.

[0154] The PPDU in Figure 10 is identified as an EHT PPDU based on the following method.

[0155] The receiving STA can determine the type of the received PPDU as an EHT PPDU based on the following: For example, the received PPDU is determined to be an EHT PPDU if 1) the first symbol after the L-LTF signal of the received PPDU is BPSK, 2) an RL-SIG (where L-SIG is repeated) is detected in the received PPDU, and 3) the result of applying "modulo 3" to the value of the Length field of L-SIG in the received PPDU is detected as "0". If the received PPDU is determined to be an EHT PPDU, the receiving STA can detect the type of the EHT PPDU (e.g., SU / MU / Trigger-based / Extended Range type) based on the bit information contained in the symbols after RL-SIG in Figure 10. In other words, the receiving STA can determine that the received PPDU is an EHT PPDU based on 1) the first symbol following the L-LTF signal which is BSPK, 2) the same RL-SIG as the L-SIG consecutively in the L-SIG field, and 3) the L-SIG containing the Length field which is set to "0" as a result of applying "modulo 3".

[0156] For example, a receiving STA can determine the type of the received PPDU as an HE PPDU based on the following: For example, if 1) the first symbol after the L-LTF signal is BPSK, 2) an RL-SIG (where L-SIG is repeated) is detected, and 3) the result of applying "modulo 3" to the Length value of L-SIG is detected as "1" or "2", then the received PPDU is determined to be an HE PPDU.

[0157] For example, the receiving STA can determine the type of the received PPDU as non-HT, HT, or VHT PPDU based on the following: For example, if 1) the first symbol after the L-LTF signal is BPSK, and 2) RL-SIG (where L-SIG is repeated) is not detected, the received PPDU is determined to be non-HT, HT, or VHT PPDU. Also, even if the receiving STA detects a repetition of RL-SIG, if the result of applying "modulo 3" to the Length value of L-SIG is detected as "0", the received PPDU is determined to be non-HT, HT, or VHT PPDU.

[0158] In the following example, signals represented as (transmit / receive / up / down) signals, (transmit / receive / up / down) frames, (transmit / receive / up / down) packets, (transmit / receive / up / down) data units, (transmit / receive / up / down) data, etc., may be signals transmitted and received based on the PPDU in Figure 10. The PPDU in Figure 10 is used to transmit and receive various types of frames. For example, the PPDU in Figure 10 is used for control frames. An example of a control frame may include RTS (request to send), CTS (clear to send), PS-Poll (Power Save-Poll), Block ACK Req, Block Ack, NDP (Null Data Packet) announcement, and Trigger frame. For example, the PPDU in Figure 10 is used for management frames. An example of a management frame may include Beacon frames, (Re-)Association Request frames, (Re-)Association Response frames, Probe Request frames, and Probe Response frames. For example, the PPDU in Figure 10 is used for data frames. For example, the PPDU in Figure 10 is also used to transmit at least two or more of the following simultaneously: control frames, management frames, and data frames.

[0159] Figure 11 shows a modified example of the transmitting and / or receiving apparatus described herein.

[0160] Each device / STA in Figure 1(a) / (b) can be modified as shown in Figure 11. The transceiver 630 in Figure 11 may be the same as the transceivers 113 and 123 in Figure 1. The transceiver 630 in Figure 11 may include a receiver and a transmitter.

[0161] The processor 610 in Figure 11 may be the same as the processors 111 and 121 in Figure 1. Alternatively, the processor 610 in Figure 11 may be the same as the processing chips 114 and 124 in Figure 1.

[0162] Memory 150 in Figure 11 may be the same as memories 112 and 122 in Figure 1. Alternatively, memory 150 in Figure 11 may be a separate external memory different from memories 112 and 122 in Figure 1.

[0163] Referring to Figure 11, the power management module 611 manages power to the processor 610 and / or the transceiver 630. The battery 612 supplies power to the power management module 611. The display 613 outputs the results processed by the processor 610. The keypad 614 receives inputs used by the processor 610. The keypad 614 can be displayed on the display 613. The SIM card 615 may be an integrated circuit used to securely store IMSI (international mobile subscriber identity) and associated keys used to identify and authenticate subscribers in mobile phone devices such as mobile phones and computers.

[0164] Referring to Figure 11, the speaker 640 can output sound-related results processed by the processor 610. The microphone 641 can receive sound-related inputs used by the processor 610.

[0165] 1. Allocation of subcarriers and resources for broadband

[0166] In this specification, broadband refers to bandwidths of 80 MHz or greater (80 MHz, 160 MHz, and 320 MHz). The tone plans (or resource unit arrangements) used in the 20 MHz and 40 MHz bandwidths are the same for 802.11ax and 802.11be (using the RU arrangements in Figures 5 and 6).

[0167] In the 20MHz HE / EHT PPDU, the RU data and pilot subcarrier indices are fixed as follows. In the table below, a subcarrier with a subcarrier index of 0 corresponds to a DC tone. A subcarrier with a negative subcarrier index corresponds to a subcarrier with a frequency lower than the DC tone. A subcarrier with a positive subcarrier index corresponds to a subcarrier with a frequency higher than the DC tone. In this case, RU5 is the middle 26 tone RU.

[0168] [Table 3]

[0169] In the 40MHz HE / EHT PPDU, the RU data and pilot subcarrier indices are fixed as follows. In the table below, subcarriers with a subcarrier index of 0 correspond to the DC tone. Subcarriers with a negative subcarrier index correspond to subcarriers with frequencies lower than the DC tone. Subcarriers with a positive subcarrier index correspond to subcarriers with frequencies higher than the DC tone.

[0170] [Table 4]

[0171] However, in order to define the tone plan for 802.11be as different from the tone plan for 802.11ax for broadband frequencies, the tone plan for the 80MHz band will be explained below.

[0172] Figure 12 shows the tone plan for an 80MHz PPDU in an 802.11be wireless LAN system.

[0173] The tone plan and RU positions for 20MHz and 40MHz PPDUs in an 802.11be wireless LAN system are the same as those for an 802.11ax wireless LAN system. Figure 12 shows the EHT tone plan and RU positions for an 80MHz PPDU. An EHT PPDU extended to a bandwidth of 160MHz or higher consists of multiple 80MHz subblocks. The tone plan for each 80MHz subblock is the same as the tone plan for an 80MHz EHT PPDU. If an 80MHz subblock in an 80 / 160 / 320MHz PPDU is not punctured and the entire 80MHz subblock is used as part of an RU or MRU, the 80MHz subblock uses the 996 tone RU shown in Figure 12. If an 80MHz subblock in an 80 / 160 / 320MHz PPDU is punctured or the entire 80MHz subblock is not used as part of an RU or MRU, the 80MHz subblock uses the tone plan in Figure 12 excluding the 996 tone RU.

[0174] In the 80MHz EHT PPDU, the RU data and pilot subcarrier indices are fixed as follows. In the table below, subcarriers with a subcarrier index of 0 correspond to DC tones. Subcarriers with a negative subcarrier index correspond to subcarriers with frequencies lower than the DC tone. Subcarriers with a positive subcarrier index correspond to subcarriers with frequencies higher than the DC tone. Also, in 802.11be, since the central 26 tone RU is not defined in the tone plan for the 80MHz band, RU19 is indicated as not defined.

[0175] [Table 5]

[0176] Furthermore, in 802.11be, the tone plan for the 160MHz band is obtained by repeating the tone plan in Figure 12 twice, thereby fixing the RU data and pilot subcarrier index in the 160MHz EHT PPDU based on Table 5. In 802.11be, the tone plan for the 320MHz band is obtained by repeating the tone plan in Figure 12 four times, thereby fixing the RU data and pilot subcarrier index in the 320MHz EHT PPDU based on Table 5.

[0177] Furthermore, in 802.11be, MRU (Multiple RUs) are assigned to EHT STA, and the subcarrier index of the MRU consists of the RU index shown in Table 5 above.

[0178] Non-AP STA operating at 2.20MHz

[0179] A non-AP EHT STA operating at 20MHz is currently a non-AP EHT STA whose operating mode supports a maximum channel width of 20MHz. The supported channel width of a non-AP EHT STA is indicated in the Supported Channel Width subfield of the HE PHY Capabilities Information field. The support and operating channel width for 320MHz in the 6GHz subfield of the EHT Capabilities element are updated along with the Channel Width subfield of the OM Control subfield, or the Channel Extension subfield of the EHT OM Control subfield and the OM Control subfield transmitted by the EHT STA, if the Operating Mode Notification frame, Operating Mode Notification element with an Rx NSS type subfield of 0, or the EHT OM Control subfield does not exist in the same A-Control field.

[0180] A non-AP EHT STA that operates at 20MHz is a 20MHz only non-AP EHT STA, or a non-AP EHT STA that can only operate with a 20MHz channel width, such as a non-AP EHT STA with a reduced operating channel width of 20MHz.

[0181] Non-AP EHT STAs operating at 20MHz must be able to participate in 20MHz, 40MHz, 80MHz, or 160MHz EHT DL and UL OFDMA transmissions. Non-AP EHT STAs operating at 20MHz, excluding 20MHz-only non-AP EHT STAs, must also be able to participate in 320MHz EHT DL and UL OFDMA transmissions.

[0182] When a non-AP EHT STA operating at 20MHz participates in EHT DL and UL OFDMA transmissions with a PPDU bandwidth of 20MHz, it must support 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 52+26-tone MRU, and 106+26-tone MRU. The EHT AP must assign the RU or MRU of a 20MHz EHT MU PPDU or EHT TB PPDU to a non-AP EHT STA operating at 20MHz.

[0183] Non-AP EHT STAs operating at 20MHz can support 26-tone RU, 52-tone RU, 106-tone RU, and 52+26-tone MRU when participating in EHT DL and UL OFDMA transmissions with a PPDU bandwidth greater than 20MHz and less than 320MHz. Non-AP EHT STAs operating at 20MHz, excluding 20MHz-only non-AP EHT STAs, must also support 26-tone RU, 52-tone RU, 106-tone RU, and 52+26-tone MRU at previously permitted locations when participating in EHT DL and UL OFDMA transmissions with a PPDU bandwidth of 320MHz. Non-AP EHT STAs operating at 20MHz, excluding 20MHz-only non-AP EHT STAs, can also support 242-tone RU when participating in EHT DL transmissions with a PPDU bandwidth of 320MHz. EHT APs with an operating channel width greater than 20MHz can assign RUs or MRUs on a 20MHz channel within the BSS bandwidth to non-AP EHT STAs that operate at 20MHz according to the AP's operating channel width in 40MHz, 80MHz, or 160MHz EHT MU PPDUs or EHT TB PPDUs. The AP's operating channel is the same as the BSS channel width. EHT APs with a 320MHz operating channel width must assign RUs or MRUs on a 20MHz channel within the BSS bandwidth of 320MHz EHT MU PPDUs or EHT TB PPDUs to non-AP EHT STAs that operate at 20MHz, excluding 20MHz-only non-AP EHT STAs. When an EHT AP assigns RUs or MRUs to a non-AP EHT STA that operates at 20MHz, the EHT AP must comply with the restrictions on 20MHz operation described below.

[0184] Non-AP EHT STAs operating at 20MHz must transmit preambles and data in the RU or MRU assigned to them within the 20MHz channel they operate on in 20MHz, 40MHz, 80MHz, or 160MHz EHT TB PPDUs. Non-AP EHT STAs operating at 20MHz, excluding 20MHz-only non-AP EHT STAs, must also transmit preambles and data in the RU or MRU assigned to them within the 20MHz channel they operate on in 320MHz EHT TB PPDUs. When an EHT AP assigns a RU or MRU to a non-AP EHT STA operating at 20MHz, the EHT AP must comply with the restrictions on 20MHz operation described below.

[0185] Non-AP EHT STAs operating at 20MHz must support preamble and data reception in the RU or MRU assigned within the 20MHz channel when operating in a 20MHz, 40MHz, 80MHz, or 160MHz EHT MU PPDU. Non-AP STAs operating at 20MHz, excluding 20MHz-only non-AP EHT STAs, must also support preamble and data reception in the RU or MRU assigned within the 20MHz channel when operating in a 320MHz EHT MU PPDU. RU and MRU limitations for 20MHz operation will be described later.

[0186] If an EHT AP does not configure SST (Subchannel Selective Transmission) operation on a non-primary 20MHz channel with a non-AP EHT STA operating at 20MHz, then an RU or MRU located outside the primary 20MHz channel in an 80MHz, 160MHz, or 320MHz EHT MU PPDU or EHT TB PPDU must not be assigned to a non-AP EHT STA operating at 20MHz.

[0187] 3. Embodiments applicable to this specification

[0188] In wireless LAN 802.11be systems, to increase peak throughput, it is considered to use a wider bandwidth than existing 802.11ax or to transmit increased streams using more antennas. This specification also considers methods of using aggregation of various bands / links.

[0189] On the other hand, a 20MHz only or operating non-AP STA can be used in the 2.4GHz or 5GHz band (and even more so in the 6GHz band), in which case the 20MHz only or operating non-AP STA can be assigned to RUs within a specific 20MHz subchannel of a 40 / 80 / 160 / 320MHz PPDU, as well as a 20MHz PPDU, to transmit and receive data. This specification proposes RUs within 20MHz that are not assigned to a 20MHz only or operating STA in such situations. Here, a 20MHz operating STA is a non-AP EHT STA operating in 20MHz channel width mode, meaning a 20MHz only non-AP EHT STA or an EHT STA with an operating channel width reduced to 20MHz using OMI (Operating Mode Indication). A 20MHz only STA is a 20MHz only non-AP EHT STA, which is a non-AP EHT STA that indicates in the Supported Channel Width Set subfield of the HE PHY Capabilities Information field of the HE Capabilities element that it supports only a 20MHz channel width for the frequency band.

[0190] Figure 13 shows an example of a RU that is not assigned to 20MHz only or operating STA in 40MHz PPDU transmission.

[0191] This specification proposes RUs and MRUs up to 242 RUs that cannot be assigned to 20MHz only or operating STA in each bandwidth PPDU transmission configuration. The reason why 20MHz only or operating STA cannot be assigned to these RUs and MRUs is that the tone plan for each bandwidth differs from the tone plan for 20MHz, and tones corresponding to DC tones and guard tones in the 20MHz receiver process are used to actually transmit data. Accordingly, performance degradation and interference to adjacent channels can occur, so the assignment to specific RUs and MRUs is restricted. For example, as shown in Figure 13, the shaded RU portion on the 40MHz band corresponds to RUs that include DC or guard tones in the 20MHz receiver process.

[0192] Therefore, in Figure 13, the shaded RUs may not be assigned to 20MHz only or operating STA during 40MHz transmission. However, some RUs can be assigned to 20MHz only or operating STA, as this performance may be overcome by the data subcarrier loss rate.

[0193] 3.120MHz

[0194] Figure 14 shows examples of 26+52 tone MRU and 26+106 tone MRU used in 20MHz EHT PPDU OFDMA transmission.

[0195] For 20MHz EHT PPDU transmission, the same tone plan as the existing 11ax is used, and in particular, when considering one MRU of 26+52RU, the tone plan shown in Figure 14 can be used. In 20MHz EHT PPDU, 20MHz only or operating STA is assigned to all RU and MRU defined in that bandwidth.

[0196] 3.240MHz

[0197] Figure 15 shows examples of 26+52 tone MRU and 26+106 tone MRU used in 40MHz EHT PPDU OFDMA transmission.

[0198] For 40MHz EHT PPDU transmission, the same tone plan as the existing 11ax can be used, and especially when considering one MRU of 26+52RU, the tone plan shown in Figure 15 can be used. Below, we propose RUs and MRUs that cannot be assigned to 20MHz only or operating STA, according to the size of each RU and MRU. The RU index described later is explained in the same way as the RU index in Table 4 above.

[0199] 26RU:5, 9 , 10 , the 14th 26RU

[0200] 52RU: 4 , 5 The second 52RU

[0201] 26+52RU(78RU): 5th 26RU + 2nd 52RU , 14th 26RU + 6th 52RU

[0202] 106RU: 2 , 3 The second 106RU

[0203] 26+106RU: 5th 26RU + 1st 106RU , 5th 26RU + 2nd 106RU , 14th 26RU + 3rd 106RU , 14th 26RU + 4th 106RU, in other words, All 26+106RU

[0204] 242RU: All 242RU

[0205] In addition to the aforementioned RU and MRU, other RUs and MRUs up to 242RU in size may be assigned to 20MHz only or operating STA.

[0206] However, the RU or MRU indicated by the underline above corresponds to the 20MHz receiver process. Since the data loss rate is not large when considering DC, guard tone, etc., sufficient reliable performance can be obtained with the coding gain during decoding, and therefore it is assigned to 20MHz only or operating STA.

[0207] 4.3. Each 80MHz subchannel in a bandwidth of 80MHz or higher

[0208] For each 80MHz subchannel of a PPDU using bandwidths of 80MHz and above (160MHz, 320MHz), the existing 11ax and the tone plan shown in Figure 12 are used.

[0209] Figure 16 shows an example of a 26+52 tone MRU used in 80MHz EHT PPDU OFDMA transmission.

[0210] Figure 16 shows the tone plan of Figure 12, taking into account 26 + 52 tone MRUs.

[0211] Figure 17 shows an example of a 26+106 tone MRU used in 80MHz EHT PPDU OFDMA transmission.

[0212] Figure 17 shows the tone plan of Figure 12, taking into account 26 + 106 tone MRUs.

[0213] For each 80MHz subchannel of a PPDU using bandwidths of 80MHz and above (160MHz, 320MHz), we propose the following RUs and MRUs that are not assigned to 20MHz only or operating STA, categorized by size. The RU index described later is explained in the same way as the RU index in Table 5, however, in Table 5, the 19th 26RU, which is the central 26RU, is shown with an index but is not defined, and the RU index described later is not shown with an index added to the central 26RU. For example, the 23rd, 27th, 28th, and 32nd 26RUs described later are shown as RU24, RU28, RU29, and RU33, respectively, in Table 5.

[0214] 26RU:5, 9 , 10 , 14, 23, 27 , 28 , 32nd 26RU

[0215] 52RU: 4 , 5 , 12 , 13 The second 52RU

[0216] 26+52RU(78RU): 5th 26RU + 2nd 52RU , 14th 26RU + 6th 52RU , 23rd 26RU + 10th 52RU , 32nd 26RU + 14th 52RU

[0217] 106RU: 2 , 3 , 6 , 7 The second 106RU

[0218] 26+106RU: 5th 26RU + 1st 106RU , 14th 26RU + 4th 106RU , 23rd 26RU + 5th 106RU , 32nd 26RU + 8th 106RU , in other words, All 26+106RU

[0219] 242RU: All 242RU

[0220] In addition to the RU and MRU listed above, other RU and MRU up to 242RU in size can be assigned to 20MHz only or operating STA.

[0221] However, the RU or MRU indicated by the underline above corresponds to the 20MHz receiver process. Since the data loss rate is not large when considering DC and guard, and sufficient reliability can be obtained with the coding gain during decoding, it is assigned to 20MHz only or operating STA.

[0222] Although the underlined RUs or MRUs mentioned above are assigned to 20MHz only or operating STAs, the dual 26+52RUs and 26+106RUs, and all 242RUs, may not be assigned to 20MHz only or operating STAs due to DC tone issues. In particular, for UL (uplink) TB (trigger-based) PPDUs, the aforementioned 26+52RUs and 26+106RUs, and all 242RUs, may not be assigned to 20MHz only or operating STAs. In DL (downlink) transmissions, assigning the underlined RUs or MRUs mentioned above to 20MHz only or operating STAs is not desirable from a performance standpoint, but it can improve performance in implementation, and therefore they are assigned and used in this way.

[0223] While the underlined RUs or MRUs mentioned above are assigned to 20MHz only or operating STAs, during 1024QAM (Quadrature Amplitude Modulation), 4096QAM, or stream transmissions exceeding 8 streams, some or all of the underlined RUs or MRUs may not be assigned to 20MHz only or operating STAs. For example, during 1024QAM, 4096QAM, or stream transmissions exceeding 8 streams, 26+52RUs, 26+106RUs, and all 242RUs among the underlined RUs or MRUs mentioned above may not be assigned to 20MHz only or operating STAs.

[0224] Figure 18 is a procedure flowchart illustrating the operation of the transmitting device according to this embodiment.

[0225] An example shown in Figure 18 can be implemented in a transmitting STA or transmitting device (AP and / or non-AP STA).

[0226] Some of the steps (or the detailed sub-steps described later) in the example shown in Figure 18 can be omitted or modified.

[0227] Through step S1810, the transmitting device (transmitting STA) can obtain the Tone plan information described above. As described above, the Tone plan information includes the size and location of the RU, control information related to the RU, information about the frequency band in which the RU is contained, and information about the STA receiving the RU.

[0228] Through step S1820, the transmitting device can configure / generate a PPDU based on the acquired control information. The steps for configuring / generating the PPDU may include steps for configuring / generating each field of the PPDU. That is, step S1820 may include a step for configuring the EHT-SIG field, which contains control information regarding the Tone plan. That is, step S1820 may include a step for configuring a field containing control information (e.g., an N-bit map) indicating the size / location of the RU and / or a step for configuring a field containing the identifier (e.g., AID) of the STA receiving the RU.

[0229] Furthermore, step S1820 may include a step to generate an STF / LTF sequence to be sent via a specific RU. The STF / LTF sequence is generated based on an already configured STF generation sequence / LTF generation sequence.

[0230] Furthermore, step S1820 may include a step to generate a data field (i.e., MPDU) to be transmitted through a specific RU.

[0231] The transmitting device can transmit the configured PPDU via step S1820 to the receiving device based on step S1830.

[0232] While step S1830 is being executed, the transmitter may perform at least one of the following operations: CSD, Spatial Mapping, IDFT / IFFT operation, or GI insertion (insert).

[0233] The signals / fields / sequences configured herein are transmitted in the form shown in Figure 10.

[0234] Figure 19 is a procedure flowchart showing the operation of the receiving device according to this embodiment.

[0235] The PPDU mentioned above is received as shown in the example in Figure 18.

[0236] An example shown in Figure 19 can be implemented in a receiving STA or receiving device (AP and / or non-AP STA).

[0237] Some of the steps (or the detailed sub-steps described later) in the example shown in Figure 19 can be omitted.

[0238] The receiving device (receiving STA) can receive all or part of the PPDU via step S1910. The received signal is in the form shown in Figure 10.

[0239] The sub-step of step S1910 is determined based on step S1830 in Figure 18. That is, step S1910 can perform an operation to restore the results of the CSD, Spatial Mapping, IDFT / IFFT, and GI insertion (insert) operations applied in step S1830.

[0240] In step S1920, the receiving device can perform decoding of all or part of the PPDU. The receiving device can also obtain control information related to the Tone plan (i.e., RU) from the decoded PPDU.

[0241] More specifically, the receiving device can decode the L-SIG and EHT-SIG of the PPDU based on the Legacy STF / LTF and obtain the information contained in the L-SIG and EHT-SIG fields. Information regarding the various Tone plans (i.e., RUs) described herein is contained in the EHT-SIG, and the receiving STA can obtain information regarding the Tone plans (i.e., RUs) via the EHT-SIG.

[0242] In step S1930, the receiving device can decode the rest of the PPDU based on the information about the Tone plan (i.e., RU) obtained through step S1920. For example, the receiving STA can decode the STF / LTF fields of the PPDU based on the information about the one plan (i.e., RU). The receiving STA can also decode the data fields of the PPDU based on the information about the Tone plan (i.e., RU) and obtain the MPDU contained in the data fields.

[0243] Furthermore, the receiving device can perform a processing operation to transfer the decoded data to a higher layer (e.g., the MAC layer) via step S1930. If the higher layer instructs the PHY layer to generate a signal in response to the data transferred to the higher layer, the receiving device can then perform subsequent operations.

[0244] The embodiments described above will be explained below with reference to Figures 1 to 19.

[0245] Figure 20 is a flowchart illustrating the procedure for limiting and allocating RU or MRU to an STA that operates only in the 20MHz bandwidth according to this embodiment of the AP.

[0246] An example shown in Figure 20 can be implemented in a network environment that supports a next-generation wireless LAN system (IEEE 802.11be or EHT wireless LAN system). This next-generation wireless LAN system is an improved version of the 802.11ax system and can maintain backward compatibility with the 802.11ax system.

[0247] An example shown in Figure 20 is performed at a transmitting STA (station), and the transmitting STA can correspond to an AP (access point) STA. The receiving STA in Figure 20 can correspond to a non-AP STA that operates only in the 20MHz band.

[0248] This embodiment proposes a method for setting RUs and MRUs that cannot be assigned (or have their assignment restricted) to STAs that operate only in the 20MHz band, taking into account the newly defined 80MHz band tone plan in an 802.11be wireless LAN system.

[0249] In step S2010, the transmitting STA (station) generates a PPDU (Physical Protocol Data Unit).

[0250] In step S2020, the transmitting STA transmits the PPDU to the receiving STA via the frequency band already set.

[0251] The aforementioned receiving STA is an STA that operates only in the 20MHz bandwidth.

[0252] The PPDU includes a preamble and a data field. The data field is received in the resources of the already configured frequency band, excluding the first RU (Resource Unit) and the first MRU (Multiple RUs). The first MRU is newly defined in the 802.11be wireless LAN system as a multiple RU in which two RUs are aggregated.

[0253] If the previously set frequency band is a 40MHz band, the RU arrangement (or tone plan) for the 40MHz band is as follows. The tone plan for the 40MHz band is the same for both 802.11ax and 802.11be wireless LAN systems.

[0254] If the 40MHz band consists only of 26 tone RUs, the 40MHz band includes the first to the 18th set of 26 tone RUs. If the 40MHz band consists only of 52 tone RUs, the 40MHz band includes the first to the 8th set of 52 tone RUs. If the 40MHz band consists only of 106 tone RUs, the 40MHz band includes the first to the 4th set of 106 tone RUs. If the 40MHz band consists only of 242 tone RUs, the 40MHz band includes the first and second sets of 242 tone RUs.

[0255] In this case, the first to 18th 26-tone RUs are arranged in order from the lowest frequency 26-tone RUs to the highest frequency 26-tone RUs. The first to 8th 52-tone RUs are arranged in order from the lowest frequency 52-tone RUs to the highest frequency 52-tone RUs. The first to 4th 106-tone RUs are arranged in order from the lowest frequency 106-tone RUs to the highest frequency 106-tone RUs. The first and second 242-tone RUs are arranged in order from the lowest frequency 242-tone RUs to the highest frequency 242-tone RUs.

[0256] The first RU includes the fifth and fourteenth 26-tone RUs and the first and second 242-tone RUs. That is, the fifth and fourteenth 26-tone RUs and the first and second 242-tone RUs are resources that are not allocated to the receiving STA.

[0257] The first MRU includes an MRU in which the fifth 26-tone RU and the second 52-tone RU are aggregated, an MRU in which the fourteenth 26-tone RU and the sixth 52-tone RU are aggregated, an MRU in which the fifth 26-tone RU and the first 106-tone RU are aggregated, an MRU in which the fifth 26-tone RU and the second 106-tone RU are aggregated, an MRU in which the fourteenth 26-tone RU and the third 106-tone RU are aggregated, and an MRU in which the fourteenth 26-tone RU and the fourth 106-tone RU are aggregated. That is, the multiple RUs included in the first MRU also correspond to resources that are not allocated to the receiving STA.

[0258] This embodiment proposes a method in which when the receiving STA that operates only in the 20 MHz band receives an OFDMA PPDU via the 40 MHz band, the receiving STA is allocated only to the remaining resource units excluding the first RU and the first MRU. In this way, there is a new effect that performance degradation and interference with adjacent channels can be prevented by preventing data from being placed on tones corresponding to DC tones and guard tones in the 20 MHz band in which the receiving STA can operate.

[0259] Also, when the receiving STA that operates only in the 20 MHz band receives an OFDMA PPDU via the 80 MHz band, the method in which the receiving STA is allocated only to the remaining resource units excluding the first RU and the first MRU can be proposed as follows.

[0260] When the already set frequency band is the 80 MHz band, the arrangement (or tone plan) of the RUs for the 80 MHz band is as follows. Since the tone plan for the 80 MHz band proposed in the 802.11be wireless LAN system is different from the tone plan for the 80 MHz band proposed in 802.11ax, it is necessary to newly set for the RU and MRU restrictions.

[0261] When the 80 MHz band is composed of only 26-tone RUs, the 80 MHz band can include 26-tone RUs from the first to the 36th. When the 80 MHz band is composed of only 52-tone RUs, the 80 MHz band can include 52-tone RUs from the first to the 16th. When the 80 MHz band is composed of only 106-tone RUs, the 80 MHz band can include 106-tone RUs from the first to the 8th. When the 80 MHz band is composed of only 242-tone RUs, the 80 MHz band can include 242-tone RUs from the first to the 4th.

[0262] At this time, the 26-tone RUs from the first to the 36th are arranged in ascending order of the 26-tone RUs with lower frequencies to the 26-tone RUs with higher frequencies, the 52-tone RUs from the first to the 16th are arranged in ascending order of the 52-tone RUs with lower frequencies to the 52-tone RUs with higher frequencies, the 106-tone RUs from the first to the 8th are arranged in ascending order of the 106-tone RUs with lower frequencies to the 106-tone RUs with higher frequencies, and the 242-tone RUs from the first to the 4th are arranged in ascending order of the 242-tone RUs with lower frequencies to the 242-tone RUs with higher frequencies.

[0263] The first RU can include the 5th, 14th, 23rd, and 32nd 26-tone RUs and the 242-tone RUs from the first to the 4th. That is, the 5th, 14th, 23rd, and 32nd 26-tone RUs and the 242-tone RUs from the first to the 4th correspond to resources not allocated to the receiving STA.

[0264] The first MRU may include an MRU aggregated from the fifth 26-tone RU and the second 52-tone RU, an MRU aggregated from the fourteenth 26-tone RU and the sixth 52-tone RU, an MRU aggregated from the 23rd 26-tone RU and the tenth 52-tone RU, an MRU aggregated from the 32nd 26-tone RU and the fourteenth 52-tone RU, an MRU aggregated from the fifth 26-tone RU and the first 106-tone RU, an MRU aggregated from the fourteenth 26-tone RU and the fourth 106-tone RU, an MRU aggregated from the 23rd 26-tone RU and the fifth 106-tone RU, and an MRU aggregated from the 32nd 26-tone RU and the eighth 106-tone RU. In other words, multiplexed RUs included in the first MRU also constitute resources that are not allocated to the receiving STA.

[0265] Furthermore, if the receiving STA, which operates only in the 20MHz band, receives an OFDMA PPDU via the 160MHz band, a method can be proposed to allocate the receiving STA only to the remaining resource units excluding the first RU and first MRU as follows.

[0266] If the previously set frequency band is a 160MHz band, the RU arrangement (or tone plan) for the 160MHz band is as follows: The tone plan for the 160MHz band proposed in the 802.11be wireless LAN system is the same as the tone plan for the 80MHz band proposed in the 802.11be wireless LAN system, repeated twice. The 160MHz band may include first and second 80MHz subchannels.

[0267] If the first 80MHz subchannel consists of only 26 tone RUs, the first 80MHz subchannel may include 26 tone RUs from the first to the 36th; if the first 80MHz subchannel consists of only 52 tone RUs, the first 80MHz subchannel may include 52 tone RUs from the first to the 16th; if the first 80MHz subchannel consists of only 106 tone RUs, the first 80MHz subchannel may include 106 tone RUs from the first to the 8th; and if the first 80MHz subchannel consists of only 242 tone RUs, the first 80MHz subchannel may include 242 tone RUs from the first to the 4th.

[0268] If the second 80MHz subchannel consists of only 26 tone RUs, it may include 26 tone RUs from the 37th to the 72nd; if the second 80MHz subchannel consists of only 52 tone RUs, it may include 52 tone RUs from the 17th to the 32nd; if the second 80MHz subchannel consists of only 106 tone RUs, it may include 106 tone RUs from the 9th to the 16th; and if the second 80MHz subchannel consists of only 242 tone RUs, it may include 242 tone RUs from the 5th to the 8th.

[0269] In this case, the 1st to 72nd 26 tone RUs are arranged in order from the lowest frequency 26 tone RUs to the highest frequency 26 tone RUs, the 1st to 32nd 52 tone RUs are arranged in order from the lowest frequency 52 tone RUs to the highest frequency 52 tone RUs, the 1st to 16th 106 tone RUs are arranged in order from the lowest frequency 106 tone RUs to the highest frequency 106 tone RUs, and the 1st to 8th 242 tone RUs are arranged in order from the lowest frequency 242 tone RUs to the highest frequency 242 tone RUs.

[0270] The first RU may include the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26 tone RUs and the 1st to 8th 242 tone RUs. That is, the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26 tone RUs and the 1st to 8th 242 tone RUs correspond to resources not allocated to the receiving STA.

[0271] The first MRU is an aggregate MRU of the fifth 26-tone RU and the second 52-tone RU, an aggregate MRU of the fourteenth 26-tone RU and the sixth 52-tone RU, an aggregate MRU of the 23rd 26-tone RU and the tenth 52-tone RU, an aggregate MRU of the 32nd 26-tone RU and the fourteenth 52-tone RU, an aggregate MRU of the 41st 26-tone RU and the eighteenth 52-tone RU, an aggregate MRU of the 50th 26-tone RU and the 22nd 52-tone RU, an aggregate MRU of the 59th 26-tone RU and the 26th 52-tone RU, an aggregate MRU of the 68th 26-tone RU and the 30th 52-tone RU, the This may include MRUs where the 26-tone RU of 5 and the 106-tone RU of the 1st are aggregated, MRUs where the 26-tone RU of the 14th are aggregated and the 106-tone RU of the 4th are aggregated, MRUs where the 26-tone RU of the 23rd are aggregated and the 106-tone RU of the 5th are aggregated, MRUs where the 26-tone RU of the 32nd are aggregated and the 106-tone RU of the 8th are aggregated, MRUs where the 26-tone RU of the 41st are aggregated and the 106-tone RU of the 9th are aggregated, MRUs where the 26-tone RU of the 50th are aggregated and the 12th are aggregated, MRUs where the 26-tone RU of the 59th are aggregated and the 13th are aggregated, and MRUs where the 26-tone RU of the 68th are aggregated and the 16th are aggregated. In other words, multiplexed RUs included in the 1st MRU also fall under the category of resources that are not allocated to the receiving STA.

[0272] Furthermore, if the receiving STA, which operates only in the 20MHz band, receives an OFDMA PPDU via the 320MHz band, a method can be proposed to allocate the receiving STA only to the remaining resource units excluding the first RU and first MRU as follows.

[0273] If the previously set frequency band is a 320MHz band, the RU arrangement (or tone plan) for the 320MHz band is as follows: The tone plan for the 320MHz band proposed in the 802.11be wireless LAN system is the same as the tone plan for the 80MHz band proposed in the 802.11be wireless LAN system, repeated four times. The 320MHz band may include the first to fourth 80MHz subchannels.

[0274] If the first 80MHz subchannel consists of only 26 tone RUs, the first 80MHz subchannel may include 26 tone RUs from the first to the 36th; if the first 80MHz subchannel consists of only 52 tone RUs, the first 80MHz subchannel may include 52 tone RUs from the first to the 16th; if the first 80MHz subchannel consists of only 106 tone RUs, the first 80MHz subchannel may include 106 tone RUs from the first to the 8th; and if the first 80MHz subchannel consists of only 242 tone RUs, the first 80MHz subchannel may include 242 tone RUs from the first to the 4th.

[0275] If the second 80MHz subchannel consists of only 26 tone RUs, it may include 26 tone RUs from the 37th to the 72nd; if the second 80MHz subchannel consists of only 52 tone RUs, it may include 52 tone RUs from the 17th to the 32nd; if the second 80MHz subchannel consists of only 106 tone RUs, it may include 106 tone RUs from the 9th to the 16th; and if the second 80MHz subchannel consists of only 242 tone RUs, it may include 242 tone RUs from the 5th to the 8th.

[0276] If the third 80MHz subchannel consists of only 26 tone RUs, the third 80MHz subchannel may include 26 tone RUs from the 73rd to the 108th; if the third 80MHz subchannel consists of only 52 tone RUs, the third 80MHz subchannel may include 52 tone RUs from the 33rd to the 48th; if the third 80MHz subchannel consists of only 106 tone RUs, the third 80MHz subchannel may include 106 tone RUs from the 17th to the 24th; and if the third 80MHz subchannel consists of only 242 tone RUs, the third 80MHz subchannel may include 242 tone RUs from the 9th to the 12th.

[0277] If the fourth 80MHz subchannel consists of only 26 tone RUs, the fourth 80MHz subchannel may include 26 tone RUs numbered 109 to 144; if the fourth 80MHz subchannel consists of only 52 tone RUs, the fourth 80MHz subchannel may include 52 tone RUs numbered 49 to 64; if the fourth 80MHz subchannel consists of only 106 tone RUs, the fourth 80MHz subchannel may include 106 tone RUs numbered 25 to 32; and if the fourth 80MHz subchannel consists of only 242 tone RUs, the fourth 80MHz subchannel may include 242 tone RUs numbered 13 to 16.

[0278] In this case, the 1st to 144th 26 tone RUs are arranged in order from the lowest frequency 26 tone RUs to the highest frequency 26 tone RUs, the 1st to 64th 52 tone RUs are arranged in order from the lowest frequency 52 tone RUs to the highest frequency 52 tone RUs, the 1st to 32nd 106 tone RUs are arranged in order from the lowest frequency 106 tone RUs to the highest frequency 106 tone RUs, and the 1st to 16th 242 tone RUs are arranged in order from the lowest frequency 242 tone RUs to the highest frequency 242 tone RUs.

[0279] The first RU may include the 26 tone RUs of the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st and 140th, and the 242 tone RUs of the 1st to 16th. That is, the 26 tone RUs of the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st and 140th, and the 242 tone RUs of the 1st to 16th, are resources that are not allocated to the receiving STA.

[0280] The first MRU is an aggregate MRU of the fifth 26-tone RU and the second 52-tone RU, an aggregate MRU of the fourteenth 26-tone RU and the sixth 52-tone RU, an aggregate MRU of the 23rd 26-tone RU and the tenth 52-tone RU, an aggregate MRU of the 32nd 26-tone RU and the fourteenth 52-tone RU, an aggregate MRU of the 41st 26-tone RU and the eighteenth 52-tone RU, and an aggregate MRU of the 50th 26-tone RU and the 22nd 52-tone RU. U, MRU aggregated from the 26-tone RU of the 59th and the 52-tone RU of the 26th, MRU aggregated from the 26-tone RU of the 68th and the 52-tone RU of the 30th, MRU aggregated from the 26-tone RU of the 77th and the 52-tone RU of the 34th, MRU aggregated from the 26-tone RU of the 86th and the 52-tone RU of the 38th, MRU aggregated from the 26-tone RU of the 95th and the 52-tone RU of the 42nd, MRU aggregated from the 26-tone RU of the 104th and the 52-tone RU of the 46th, MRU aggregated from the 113th 26-tone RU and the 50th 52-tone RU, MRU aggregated from the 122nd 26-tone RU and the 54th 52-tone RU, MRU aggregated from the 131st 26-tone RU and the 58th 52-tone RU, MRU aggregated from the 140th 26-tone RU and the 62nd 52-tone RU, MRU aggregated from the 5th 26-tone RU and the 1st 106-tone RU, MRU aggregated from the 14th 26-tone RU and the 4th 106-tone RU, MRU aggregated from the 23rd 26-tone RU and the 5th 106-tone RU, MRU aggregated from the 32nd 26-tone RU and the 8th 106-tone RU, MRU aggregated from the 41st 26-tone RU and the 9th 106-tone RU, MRU aggregated from the 50th 26-tone RU and the 12th 106-tone RU, MRU aggregated from the 59th 26-tone RU and the 13th 106-tone RU, MRU aggregated from the 68th 26-tone RU and the 16th 106-tone RU,This may include MRUs aggregated from the 26-tone RU of the 77th and the 106-tone RU of the 17th, MRUs aggregated from the 26-tone RU of the 86th and the 106-tone RU of the 20th, MRUs aggregated from the 26-tone RU of the 95th and the 106-tone RU of the 21st, MRUs aggregated from the 26-tone RU of the 104th and the 24th, MRUs aggregated from the 26-tone RU of the 113th and the 25th, MRUs aggregated from the 26-tone RU of the 122nd and the 28th, MRUs aggregated from the 26-tone RU of the 131st and the 29th, and MRUs aggregated from the 26-tone RU of the 140th and the 32nd. In other words, multiplexed RUs included in the first MRU also constitute resources that are not allocated to the receiving STA.

[0281] The PPDU may be a DL OFDMA PPDU or a UL OFDMA PPDU. If the PPDU is a DL OFDMA PPDU, the transmitting STA transmits an EHT (Extremely High Throughput) MU (Multi-User) PPDU to the receiving STA, and the receiving STA can decode the EHT MU PPDU in the resources of the already set frequency band excluding the first RU and the first MRU. If the PPDU is a UL OFDMA PPDU, the transmitting STA becomes an STA that operates only in the 20MHz band, and the transmitting STA receives a trigger frame from the receiving STA (here, AP), and the transmitting STA can transmit an EHT TB (Trigger Based) PPDU to the receiving STA. In this case, the EHT TB PPDU is transmitted in the resources of the already set frequency band excluding the first RU and the first MRU. The EHT MU PPDU may include L-STF (Legacy-Short Training Field), L-LTF (Legacy-Long Training Field), L-SIG (Legacy-Signal), RL-SIG (Repeated L-SIG), U-SIG (Universal-Signal), EHT-SIG, EHT-STF, and EHT-LTFs data fields. The EHT TB PPDU is defined in the same format as the EHT MU PPDU, excluding the EHT-SIG.

[0282] Also, when the PPDU is a DL OFDMA PPDU, the 242-tone RUs included in the already set frequency band are selectively allocated. For example, when the PPDU is a DL OFDMA PPDU received via a 40 MHz band, the first RU can selectively include the first and second 242-tone RUs. That is, the transmitting STA can selectively allocate the first and second 242-tone RUs to the receiving STA. When the first RU includes only the first 242-tone RU and does not include the second 242-tone RU, the receiving STA can receive the DL OFDMA PPDU via the second 242-tone RU (when the receiving STA has a capability for the second 242-tone RU). The same applies when the already set frequency band is an 80 MHz, 160 MHz, or 320 MHz band.

[0283] FIG. 21 is a flowchart showing a procedure in which a STA operating only in a 20 MHz band according to the present embodiment is restricted and allocated an RU or an MRU.

[0284] An example of FIG. 21 can be executed in a network environment supported by a next-generation wireless LAN system (IEEE 802.11be or EHT wireless LAN system). The next-generation wireless LAN system can satisfy backward compatibility with the 802.11ax system as a wireless LAN system that improves the 802.11ax system.

[0285] An example of FIG. 21 is executed at a receiving STA (station), and the receiving STA can correspond to a non-AP STA operating only in a 20 MHz band. The transmitting STA of FIG. 21 can correspond to an AP (access point) STA.

[0286] This embodiment proposes a method for setting RUs and MRUs that cannot be assigned (or have their assignment restricted) to STAs that operate only in the 20MHz band, taking into account the newly defined 80MHz band tone plan in an 802.11be wireless LAN system.

[0287] In step S2110, the receiving STA (station) receives a PPDU (Physical Protocol Data Unit) from the transmitting STA via the previously configured frequency band.

[0288] In step S2120, the receiving STA decodes the PPDU.

[0289] The aforementioned receiving STA is an STA that operates only in the 20MHz bandwidth.

[0290] The PPDU includes a preamble and a data field. The data field is received in the resources of the already configured frequency band, excluding the first RU (Resource Unit) and the first MRU (Multiple RUs). The first MRU is a multiple RU in which two RUs are aggregated and is newly defined in 802.11be wireless LAN systems.

[0291] If the previously set frequency band is a 40MHz band, the RU arrangement (or tone plan) for the 40MHz band is as follows. The tone plan for the 40MHz band is the same for both 802.11ax and 802.11be wireless LAN systems.

[0292] If the 40MHz band consists only of 26 tone RUs, the 40MHz band includes the first to the 18th set of 26 tone RUs. If the 40MHz band consists only of 52 tone RUs, the 40MHz band includes the first to the 8th set of 52 tone RUs. If the 40MHz band consists only of 106 tone RUs, the 40MHz band includes the first to the 4th set of 106 tone RUs. If the 40MHz band consists only of 242 tone RUs, the 40MHz band includes the first and second sets of 242 tone RUs.

[0293] In this case, the first to 18th 26-tone RUs are arranged in order from the lowest frequency 26-tone RUs to the highest frequency 26-tone RUs. The first to 8th 52-tone RUs are arranged in order from the lowest frequency 52-tone RUs to the highest frequency 52-tone RUs. The first to 4th 106-tone RUs are arranged in order from the lowest frequency 106-tone RUs to the highest frequency 106-tone RUs. The first and second 242-tone RUs are arranged in order from the lowest frequency 242-tone RUs to the highest frequency 242-tone RUs.

[0294] The first RU includes the fifth and fourteenth 26-tone RUs and the first and second 242-tone RUs. That is, the fifth and fourteenth 26-tone RUs and the first and second 242-tone RUs are resources that are not allocated to the receiving STA.

[0295] The first MRU includes an aggregated MRU of the fifth 26-tone RU and the second 52-tone RU, an aggregated MRU of the fourteenth 26-tone RU and the sixth 52-tone RU, an aggregated MRU of the fifth 26-tone RU and the first 106-tone RU, an aggregated MRU of the fifth 26-tone RU and the second 106-tone RU, an aggregated MRU of the fourteenth 26-tone RU and the third 106-tone RU, and an aggregated MRU of the fourteenth 26-tone RU and the fourth 106-tone RU. In other words, the multiplexed RUs included in the first MRU also constitute resources that are not allocated to the receiving STA.

[0296] This embodiment proposes a method in which, when the receiving STA, which operates only in the 20MHz band, receives an OFDMA PPDU via the 40MHz band, the receiving STA is allocated only to the remaining resource units excluding the first RU and first MRU. This has the novel effect of preventing performance degradation and interference to adjacent channels by preventing data from being superimposed on tones corresponding to DC tones and guard tones in the 20MHz band in which the receiving STA can operate.

[0297] Furthermore, if the receiving STA, which operates only in the 20MHz band, receives an OFDMA PPDU via the 80MHz band, a method can be proposed to allocate the receiving STA only to the remaining resource units excluding the first RU and first MRU as follows.

[0298] If the previously set frequency band is the 80MHz band, the RU arrangement (or tone plan) for the 80MHz band is as follows. The tone plan for the 80MHz band proposed in the 802.11be wireless LAN system differs from the tone plan for the 80MHz band proposed in 802.11ax, so new settings are required for RU and MRU limits.

[0299] If the 80MHz band consists only of 26 tone RUs, the 80MHz band may include 1 to 36 sets of 26 tone RUs. If the 80MHz band consists only of 52 tone RUs, the 80MHz band may include 1 to 16 sets of 52 tone RUs. If the 80MHz band consists only of 106 tone RUs, the 80MHz band may include 1 to 8 sets of 106 tone RUs. If the 80MHz band consists only of 242 tone RUs, the 80MHz band may include 1 to 4 sets of 242 tone RUs.

[0300] In this case, the 1st to 36th 26-tone RUs are arranged in order from the lowest frequency 26-tone RUs to the highest frequency 26-tone RUs, the 1st to 16th 52-tone RUs are arranged in order from the lowest frequency 52-tone RUs to the highest frequency 52-tone RUs, the 1st to 8th 106-tone RUs are arranged in order from the lowest frequency 106-tone RUs to the highest frequency 106-tone RUs, and the 1st to 4th 242-tone RUs are arranged in order from the lowest frequency 242-tone RUs to the highest frequency 242-tone RUs.

[0301] The first RU may include the fifth, fourteenth, 23rd, and 32nd 26-tone RUs and the first to fourth 242-tone RUs. That is, the fifth, fourteenth, 23rd, and 32nd 26-tone RUs and the first to fourth 242-tone RUs are resources that are not allocated to the receiving STA.

[0302] The first MRU may include an MRU aggregated from the fifth 26-tone RU and the second 52-tone RU, an MRU aggregated from the fourteenth 26-tone RU and the sixth 52-tone RU, an MRU aggregated from the 23rd 26-tone RU and the tenth 52-tone RU, an MRU aggregated from the 32nd 26-tone RU and the fourteenth 52-tone RU, an MRU aggregated from the fifth 26-tone RU and the first 106-tone RU, an MRU aggregated from the fourteenth 26-tone RU and the fourth 106-tone RU, an MRU aggregated from the 23rd 26-tone RU and the fifth 106-tone RU, and an MRU aggregated from the 32nd 26-tone RU and the eighth 106-tone RU. In other words, multiplexed RUs included in the first MRU also constitute resources that are not allocated to the receiving STA.

[0303] Furthermore, if the receiving STA, which operates only in the 20MHz band, receives an OFDMA PPDU via the 160MHz band, a method can be proposed to allocate the receiving STA only to the remaining resource units excluding the first RU and first MRU as follows.

[0304] If the previously set frequency band is a 160MHz band, the RU arrangement (or tone plan) for the 160MHz band is as follows: The tone plan for the 160MHz band proposed in the 802.11be wireless LAN system is the same as the tone plan for the 80MHz band proposed in the 802.11be wireless LAN system, repeated twice. The 160MHz band may include first and second 80MHz subchannels.

[0305] If the first 80MHz subchannel consists of only 26 tone RUs, the first 80MHz subchannel may include 26 tone RUs from the first to the 36th; if the first 80MHz subchannel consists of only 52 tone RUs, the first 80MHz subchannel may include 52 tone RUs from the first to the 16th; if the first 80MHz subchannel consists of only 106 tone RUs, the first 80MHz subchannel may include 106 tone RUs from the first to the 8th; and if the first 80MHz subchannel consists of only 242 tone RUs, the first 80MHz subchannel may include 242 tone RUs from the first to the 4th.

[0306] If the second 80MHz subchannel consists of only 26 tone RUs, it may include 26 tone RUs from the 37th to the 72nd; if the second 80MHz subchannel consists of only 52 tone RUs, it may include 52 tone RUs from the 17th to the 32nd; if the second 80MHz subchannel consists of only 106 tone RUs, it may include 106 tone RUs from the 9th to the 16th; and if the second 80MHz subchannel consists of only 242 tone RUs, it may include 242 tone RUs from the 5th to the 8th.

[0307] In this case, the 1st to 72nd 26 tone RUs are arranged in order from the lowest frequency 26 tone RUs to the highest frequency 26 tone RUs, the 1st to 32nd 52 tone RUs are arranged in order from the lowest frequency 52 tone RUs to the highest frequency 52 tone RUs, the 1st to 16th 106 tone RUs are arranged in order from the lowest frequency 106 tone RUs to the highest frequency 106 tone RUs, and the 1st to 8th 242 tone RUs are arranged in order from the lowest frequency 242 tone RUs to the highest frequency 242 tone RUs.

[0308] The first RU may include the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26 tone RUs and the 1st to 8th 242 tone RUs. That is, the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, and 68th 26 tone RUs and the 1st to 8th 242 tone RUs correspond to resources not allocated to the receiving STA.

[0309] The first MRU is an aggregate MRU of the fifth 26-tone RU and the second 52-tone RU, an aggregate MRU of the fourteenth 26-tone RU and the sixth 52-tone RU, an aggregate MRU of the 23rd 26-tone RU and the tenth 52-tone RU, an aggregate MRU of the 32nd 26-tone RU and the fourteenth 52-tone RU, an aggregate MRU of the 41st 26-tone RU and the eighteenth 52-tone RU, an aggregate MRU of the 50th 26-tone RU and the 22nd 52-tone RU, an aggregate MRU of the 59th 26-tone RU and the 26th 52-tone RU, an aggregate MRU of the 68th 26-tone RU and the 30th 52-tone RU, the This may include MRUs where the 26-tone RU of 5 and the 106-tone RU of the 1st are aggregated, MRUs where the 26-tone RU of the 14th are aggregated and the 106-tone RU of the 4th are aggregated, MRUs where the 26-tone RU of the 23rd are aggregated and the 106-tone RU of the 5th are aggregated, MRUs where the 26-tone RU of the 32nd are aggregated and the 106-tone RU of the 8th are aggregated, MRUs where the 26-tone RU of the 41st are aggregated and the 106-tone RU of the 9th are aggregated, MRUs where the 26-tone RU of the 50th are aggregated and the 12th are aggregated, MRUs where the 26-tone RU of the 59th are aggregated and the 13th are aggregated, and MRUs where the 26-tone RU of the 68th are aggregated and the 16th are aggregated. In other words, multiplexed RUs included in the 1st MRU also fall under the category of resources that are not allocated to the receiving STA.

[0310] Furthermore, if the receiving STA, which operates only in the 20MHz band, receives an OFDMA PPDU via the 320MHz band, a method can be proposed to allocate the receiving STA only to the remaining resource units excluding the first RU and first MRU as follows.

[0311] If the previously set frequency band is a 320MHz band, the RU arrangement (or tone plan) for the 320MHz band is as follows: The tone plan for the 320MHz band proposed in the 802.11be wireless LAN system is the same as the tone plan for the 80MHz band proposed in the 802.11be wireless LAN system, repeated four times. The 320MHz band may include the first to fourth 80MHz subchannels.

[0312] If the first 80MHz subchannel consists of only 26 tone RUs, the first 80MHz subchannel may include 26 tone RUs from the first to the 36th; if the first 80MHz subchannel consists of only 52 tone RUs, the first 80MHz subchannel may include 52 tone RUs from the first to the 16th; if the first 80MHz subchannel consists of only 106 tone RUs, the first 80MHz subchannel may include 106 tone RUs from the first to the 8th; and if the first 80MHz subchannel consists of only 242 tone RUs, the first 80MHz subchannel may include 242 tone RUs from the first to the 4th.

[0313] If the second 80MHz subchannel consists of only 26 tone RUs, it may include 26 tone RUs from the 37th to the 72nd; if the second 80MHz subchannel consists of only 52 tone RUs, it may include 52 tone RUs from the 17th to the 32nd; if the second 80MHz subchannel consists of only 106 tone RUs, it may include 106 tone RUs from the 9th to the 16th; and if the second 80MHz subchannel consists of only 242 tone RUs, it may include 242 tone RUs from the 5th to the 8th.

[0314] If the third 80MHz subchannel consists of only 26 tone RUs, the third 80MHz subchannel may include 26 tone RUs from the 73rd to the 108th; if the third 80MHz subchannel consists of only 52 tone RUs, the third 80MHz subchannel may include 52 tone RUs from the 33rd to the 48th; if the third 80MHz subchannel consists of only 106 tone RUs, the third 80MHz subchannel may include 106 tone RUs from the 17th to the 24th; and if the third 80MHz subchannel consists of only 242 tone RUs, the third 80MHz subchannel may include 242 tone RUs from the 9th to the 12th.

[0315] If the fourth 80MHz subchannel consists of only 26 tone RUs, the fourth 80MHz subchannel may include 26 tone RUs numbered 109 to 144; if the fourth 80MHz subchannel consists of only 52 tone RUs, the fourth 80MHz subchannel may include 52 tone RUs numbered 49 to 64; if the fourth 80MHz subchannel consists of only 106 tone RUs, the fourth 80MHz subchannel may include 106 tone RUs numbered 25 to 32; and if the fourth 80MHz subchannel consists of only 242 tone RUs, the fourth 80MHz subchannel may include 242 tone RUs numbered 13 to 16.

[0316] In this case, the 1st to 144th 26 tone RUs are arranged in order from the lowest frequency 26 tone RUs to the highest frequency 26 tone RUs, the 1st to 64th 52 tone RUs are arranged in order from the lowest frequency 52 tone RUs to the highest frequency 52 tone RUs, the 1st to 32nd 106 tone RUs are arranged in order from the lowest frequency 106 tone RUs to the highest frequency 106 tone RUs, and the 1st to 16th 242 tone RUs are arranged in order from the lowest frequency 242 tone RUs to the highest frequency 242 tone RUs.

[0317] The first RU may include the 26 tone RUs of the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st and 140th, and the 242 tone RUs of the 1st to 16th. That is, the 26 tone RUs of the 5th, 14th, 23rd, 32nd, 41st, 50th, 59th, 68th, 77th, 86th, 95th, 104th, 113th, 122nd, 131st and 140th, and the 242 tone RUs of the 1st to 16th, are resources that are not allocated to the receiving STA.

[0318] The first MRU is an aggregate MRU of the fifth 26-tone RU and the second 52-tone RU, an aggregate MRU of the fourteenth 26-tone RU and the sixth 52-tone RU, an aggregate MRU of the 23rd 26-tone RU and the tenth 52-tone RU, an aggregate MRU of the 32nd 26-tone RU and the fourteenth 52-tone RU, an aggregate MRU of the 41st 26-tone RU and the eighteenth 52-tone RU, and an aggregate MRU of the 50th 26-tone RU and the 22nd 52-tone RU. U, MRU aggregated from the 26-tone RU of the 59th and the 52-tone RU of the 26th, MRU aggregated from the 26-tone RU of the 68th and the 52-tone RU of the 30th, MRU aggregated from the 26-tone RU of the 77th and the 52-tone RU of the 34th, MRU aggregated from the 26-tone RU of the 86th and the 52-tone RU of the 38th, MRU aggregated from the 26-tone RU of the 95th and the 52-tone RU of the 42nd, MRU aggregated from the 26-tone RU of the 104th and the 52-tone RU of the 46th, MRU aggregated from the 113th 26-tone RU and the 50th 52-tone RU, MRU aggregated from the 122nd 26-tone RU and the 54th 52-tone RU, MRU aggregated from the 131st 26-tone RU and the 58th 52-tone RU, MRU aggregated from the 140th 26-tone RU and the 62nd 52-tone RU, MRU aggregated from the 5th 26-tone RU and the 1st 106-tone RU, MRU aggregated from the 14th 26-tone RU and the 4th 106-tone RU, MRU aggregated from the 23rd 26-tone RU and the 5th 106-tone RU, MRU aggregated from the 32nd 26-tone RU and the 8th 106-tone RU, MRU aggregated from the 41st 26-tone RU and the 9th 106-tone RU, MRU aggregated from the 50th 26-tone RU and the 12th 106-tone RU, MRU aggregated from the 59th 26-tone RU and the 13th 106-tone RU, MRU aggregated from the 68th 26-tone RU and the 16th 106-tone RU,This may include MRUs aggregated from the 26-tone RU of the 77th and the 106-tone RU of the 17th, MRUs aggregated from the 26-tone RU of the 86th and the 106-tone RU of the 20th, MRUs aggregated from the 26-tone RU of the 95th and the 106-tone RU of the 21st, MRUs aggregated from the 26-tone RU of the 104th and the 24th, MRUs aggregated from the 26-tone RU of the 113th and the 25th, MRUs aggregated from the 26-tone RU of the 122nd and the 28th, MRUs aggregated from the 26-tone RU of the 131st and the 29th, and MRUs aggregated from the 26-tone RU of the 140th and the 32nd. In other words, multiplexed RUs included in the first MRU also constitute resources that are not allocated to the receiving STA.

[0319] The PPDU may be a DL OFDMA PPDU or a UL OFDMA PPDU. If the PPDU is a DL OFDMA PPDU, the transmitting STA transmits an EHT (Extremely High Throughput) MU (Multi-User) PPDU to the receiving STA, and the receiving STA can decode the EHT MU PPDU in the resources of the already set frequency band excluding the first RU and the first MRU. If the PPDU is a UL OFDMA PPDU, the transmitting STA becomes an STA that operates only in the 20MHz band, and the transmitting STA receives a trigger frame from the receiving STA (here, AP), and the transmitting STA can transmit an EHT TB (Trigger Based) PPDU to the receiving STA. In this case, the EHT TB PPDU is transmitted in the resources of the already set frequency band excluding the first RU and the first MRU. The EHT MU PPDU may include L-STF (Legacy-Short Training Field), L-LTF (Legacy-Long Training Field), L-SIG (Legacy-Signal), RL-SIG (Repeated L-SIG), U-SIG (Universal-Signal), EHT-SIG, EHT-STF, and EHT-LTFs data fields. The EHT TB PPDU is defined in the same format as the EHT MU PPDU, excluding the EHT-SIG.

[0320] Furthermore, if the PPDU is a DL OFDMA PPDU, the 242 tone RUs included in the already set frequency band are selectively assigned. For example, if the PPDU is a DL OFDMA PPDU received via the 40MHz band, the first RU can selectively include the first and second 242 tone RUs. That is, the transmitting STA can selectively assign the first and second 242 tone RUs to the receiving STA. If the first RU includes only the first 242 tone RU and not the second 242 tone RU, the receiving STA can receive the DL OFDMA PPDU via the second 242 tone RU (if the receiving STA has capability for the second 242 tone RU). The same applies when the already set frequency bands are the 80MHz, 160MHz, and 320MHz bands.

[0321] 4.Device configuration

[0322] The technical features of this specification described above can be applied to various devices and methods. For example, the technical features of this specification described above are implemented / supported through the device in Figure 1 and / or Figure 11. For example, the technical features of this specification described above apply only to parts of Figure 1 and / or Figure 11. For example, the technical features of this specification described above are implemented based on processing chips 114, 124 in Figure 1, or based on processors 111, 121 and memories 112, 122 in Figure 1, or based on processor 610 and memory 620 in Figure 11. For example, the device of this specification receives a PPDU (Physical Protocol Data Unit) from a transmitting STA via a pre-configured frequency band; and decodes the PPDU.

[0323] The technical features of this specification are implemented based on a CRM (computer-readable medium). For example, the CRM proposed herein is at least one computer-readable medium containing instructions that are based on being executed by at least one processor.

[0324] The CRM can store instructions for performing operations that include the steps of receiving a Physical Protocol Data Unit (PPDU) from a transmitting STA (station) via a pre-configured frequency band, and decoding the PPDU. Instructions stored in the CRM according to this specification are executed by at least one processor. The at least one processor associated with the CRM according to this specification may be the processors 111, 121 or processing chips 114, 124 in Figure 1, or the processor 610 in Figure 11. On the other hand, the CRM according to this specification may be the memory 112, 122 in Figure 1, the memory 620 in Figure 11, or a separate external memory / storage medium / disk, etc.

[0325] The technical features described herein are applicable to a variety of applications and business models. For example, these technical features are applicable to wireless communication in devices that support artificial intelligence (AI).

[0326] Artificial intelligence refers to the field of studying artificial intelligence or methodologies for creating it, while machine learning refers to the field of defining various problems dealt with in the field of artificial intelligence and studying methodologies for solving them. Machine learning can also be defined as an algorithm that improves its performance for a particular task through continuous experience.

[0327] An artificial neural network (ANN) is a model used in machine learning that consists of artificial neurons (nodes) that form a network of synaptic connections, and is generally considered to have problem-solving capabilities. An artificial neural network is defined by the connection patterns between neurons in other layers, the learning process that updates the model parameters, and the activation function that generates the output values.

[0328] An artificial neural network can include an input layer, an output layer, and optionally one or more hidden layers. Each layer contains one or more neurons, and the artificial neural network can include synapses connecting neurons. In an artificial neural network, each neuron can output an input signal, a weighted value, and a function value of the activation function for the bias received via the synapse.

[0329] Model parameters refer to parameters determined through learning, including synaptic connection weights and neuron bias. Hyperparameters, on the other hand, refer to parameters that need to be set before learning in a machine learning algorithm, including the learning rate, iteration count, mini-batch size, and initialization function.

[0330] The goal of training an artificial neural network is to determine the model parameters that minimize the loss function. The loss function is used as an indicator to determine the optimal model parameters during the training process of the artificial neural network.

[0331] Machine learning can be classified into supervised learning, unsupervised learning, and reinforcement learning based on the learning method.

[0332] Supervised learning refers to a method of training an artificial neural network when labels are provided for the training data. When labels are input to the artificial neural network, they represent the correct answer (or result value) that the artificial neural network needs to infer. Unsupervised learning refers to a method of training an artificial neural network when labels are not provided for the training data. Reinforcement learning refers to a learning method in which a defined agent is trained to select the action or sequence of actions that maximizes the cumulative reward in each state within a given environment.

[0333] Machine learning implemented as a deep neural network (DNN), which includes multiple hidden layers, is also called deep learning, and deep learning is a part of machine learning. In the following, machine learning will be used to include deep learning.

[0334] Furthermore, the technical features described above can be applied to wireless communication for robots.

[0335] A robot is a machine that automatically processes or operates tasks assigned to it using its own capabilities. In particular, a robot that has the ability to perceive its environment, make decisions on its own, and perform actions is called an intelligent robot.

[0336] Robots can be classified into industrial, medical, household, and military categories depending on their intended use and field. Robots are equipped with drive units, including actuators or motors, and can perform various physical actions, such as moving robotic joints. Mobile robots also include drive units with wheels, brakes, propellers, etc., and can travel on the ground or fly through the air via these drive units.

[0337] Furthermore, the technical features described above apply to devices that support augmented reality.

[0338] Augmented reality is a general term encompassing virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology provides real-world objects and backgrounds solely as computer graphics (CG) images, AR technology provides virtual CG images alongside images of real objects, and MR technology is a computer graphics technology that mixes and combines virtual objects with the real world.

[0339] Mixed Reality (MR) technology is similar to augmented reality (AR) technology in that it displays virtual objects together. However, while AR uses virtual objects to complement other virtual objects, MR uses virtual objects in a way that they are equivalent in nature.

[0340] XR technology is applied to HMDs (Head-Mount Displays), HUDs (Head-Up Displays), mobile phones, tablet PCs, laptops, desktops, TVs, digital signage, and other devices, and devices that utilize XR technology can be called XR devices.

[0341] The claims described herein can be combined in various ways. For example, the technical features of the method claims herein can be combined and implemented in an apparatus, and the technical features of the apparatus claims herein can be combined and implemented in a method. Furthermore, the technical features of the method claims herein and the technical features of the apparatus claims herein can be combined and implemented in an apparatus, and the technical features of the method claims herein and the technical features of the apparatus claims herein can be combined and implemented in a method.

Claims

1. In a method for a wireless LAN (WLAN) system, The receiving STA (station) receives a PPDU (Physical Protocol Data Unit) from the transmitting STA, The receiving STA includes the step of decoding the PPDU, The receiving STA is a non-AP STA operating at 20 MHz. The aforementioned 20MHz non-AP STA does not support the first MRU (multiple-resource unit), Based on the fact that the bandwidth of the PPDU is 40 MHz, the bandwidth of the PPDU is composed of 26 tone RUs from the 1st to the 18th, 52 tone RUs from the 1st to the 8th, 106 tone RUs from the 1st to the 4th, or 242 tone RUs from the 1st and 2nd. The first MRU includes a first MRU type and a second MRU type, The first MRU type is the 52+26-tone MRU corresponding to the MRU combination of the 52+26-tone MRU, The MRU combination of the aforementioned 52+26-tone MRU includes an MRU comprising the second 52-tone MRU and the fifth 26-tone MRU, and an MRU comprising the sixth 52-tone MRU and the fourteenth 26-tone MRU. The second MRU type is the 106+26-tone MRU corresponding to the MRU combination of the 106+26-tone MRU, The method for the 106+26-tone MRU combination includes an MRU comprising the first 106-tone MRU and the fifth 26-tone MRU, an MRU comprising the second 106-tone MRU and the fifth 26-tone MRU, an MRU comprising the third 106-tone MRU and the fourteenth 26-tone MRU, and an MRU comprising the fourth 106-tone MRU and the fourteenth 26-tone MRU.

2. The first to eighteen 26-tone RUs are arranged in order from the lowest frequency 26-tone RU to the highest frequency 26-tone RU. The first to eighth 52-tone RUs are arranged in order from the lowest frequency 52-tone RU to the highest frequency 52-tone RU, The first to fourth 106-tone RUs are arranged in order from the lowest frequency 106-tone RU to the highest frequency 106-tone RU. The method according to claim 1, wherein the first and second 242-tone RUs are arranged in order from the lowest frequency 242-tone RU to the highest frequency 242-tone RU.

3. Based on the fact that the bandwidth of the PPDU, which is 80 MHz, is composed of 26 tone RUs from the 1st to the 36th, 52 tone RUs from the 1st to the 16th, 106 tone RUs from the 1st to the 8th, or 242 tone RUs from the 1st to the 4th, The MRU combination of the 52+26-tone MRU includes an MRU comprising the 5th 26-tone MRU and the 2nd 52-tone MRU, an MRU comprising the 14th 26-tone MRU and the 6th 52-tone MRU, an MRU comprising the 23rd 26-tone MRU and the 10th 52-tone MRU, and an MRU comprising the 32nd 26-tone MRU and the 14th 52-tone MRU. The method according to claim 1, wherein the MRU combination of the 106+26-tone MRU includes an MRU comprising the fifth 26-tone MRU and the first 106-tone MRU, an MRU comprising the fourteenth 26-tone MRU and the fourth 106-tone MRU, an MRU comprising the 23rd 26-tone MRU and the fifth 106-tone MRU, and an MRU comprising the 32nd 26-tone MRU and the eighth 106-tone MRU.

4. The first to thirtieth 26-tone RUs are arranged in order from the lowest frequency 26-tone RU to the highest frequency 26-tone RU. The first to sixteenth 52-tone RUs are arranged in order from the lowest frequency 52-tone RU to the highest frequency 52-tone RU. The first to eighth 106-tone RUs are arranged in order from the lowest frequency 106-tone RU to the highest frequency 106-tone RU. The method according to claim 3, wherein the first to fourth 242 tone RUs are arranged in order from the lowest frequency 242 tone RU to the highest frequency 242 tone RU.

5. Based on the fact that the bandwidth of the PPDU, which is 160 MHz, includes the first and second 80 MHz subchannels, The first 80MHz subchannel includes 26 tone RUs from the 1st to the 36th, 52 tone RUs from the 1st to the 16th, 106 tone RUs from the 1st to the 8th, or 242 tone RUs from the 1st to the 4th. The method according to claim 1, wherein the second 80 MHz subchannel includes 26 tone RUs from the 37th to the 72nd, 52 tone RUs from the 17th to the 32nd, 106 tone RUs from the 9th to the 16th, or 242 tone RUs from the 5th to the 8th.

6. The aforementioned 52+26-tone MRU combination is: MRU including the fifth 26-tone RU and the second 52-tone RU, MRU including the fourteenth 26-tone RU and the sixth 52-tone RU, MRU including the twenty-third 26-tone RU and the tenth 52-tone RU, MRU including the thirty-second 26-tone RU and the fourteenth 52-tone RU, The MRU includes the 41 26-tone RU and the 18 52-tone RU, the MRU includes the 50 26-tone RU and the 22 52-tone RU, the MRU includes the 59 26-tone RU and the 26 52-tone RU, and the MRU includes the 68 26-tone RU and the 30 52-tone RU, The aforementioned 106 + 26 - tone MRU combination is, MRU including the fifth 26-tone RU and the first 106-tone RU, MRU including the 14th 26-tone RU and the fourth 106-tone RU, MRU including the 23rd 26-tone RU and the fifth 106-tone RU, MRU including the 32nd 26-tone RU and the eighth 106-tone RU, The method according to claim 5, comprising an MRU including the 41st 26-tone RU and the 9th 106-tone RU, an MRU including the 50th 26-tone RU and the 12th 106-tone RU, an MRU including the 59th 26-tone RU and the 13th 106-tone RU, and an MRU including the 68th 26-tone RU and the 16th 106-tone RU.

7. The first to seventy-two 26-tone RUs are arranged in order from the lowest frequency 26-tone RU to the highest frequency 26-tone RU. The first to thirtieth 52-tone RUs are arranged in order from the lowest frequency 52-tone RU to the highest frequency 52-tone RU. The first to sixteenth 106-tone RUs are arranged in order from the lowest frequency 106-tone RU to the highest frequency 106-tone RU. The method according to claim 6, wherein the first to eighth 242-tone RUs are arranged in order from the lowest frequency 242-tone RU to the highest frequency 242-tone RU.

8. Based on the fact that the bandwidth of the PPDU, which is 320 MHz, includes the first to fourth 80 MHz subchannels, The first 80MHz subchannel includes 26 tone RUs from the 1st to the 36th, 52 tone RUs from the 1st to the 16th, 106 tone RUs from the 1st to the 8th, or 242 tone RUs from the 1st to the 4th. The second 80MHz subchannel includes 26 tone RUs from the 37th to the 72nd, 52 tone RUs from the 17th to the 32nd, 106 tone RUs from the 9th to the 16th, or 242 tone RUs from the 5th to the 8th. The third 80MHz subchannel includes 26 tone RUs from the 73rd to the 108th, 52 tone RUs from the 33rd to the 48th, 106 tone RUs from the 17th to the 24th, or 242 tone RUs from the 9th to the 12th. The method according to claim 1, wherein the fourth 80 MHz subchannel includes 26 tone RUs from the 109th to the 144th, 52 tone RUs from the 49th to the 64th, 106 tone RUs from the 25th to the 32nd, or 242 tone RUs from the 13th to the 16th.

9. The aforementioned 52+26-tone MRU combination is: MRU including the fifth 26-tone RU and the second 52-tone RU, MRU including the fourteenth 26-tone RU and the sixth 52-tone RU, MRU including the twenty-third 26-tone RU and the tenth 52-tone RU, MRU including the thirty-second 26-tone RU and the fourteenth 52-tone RU, MRU including the 41 26-tone RU and the 18 52-tone RU, MRU including the 50 26-tone RU and the 22 52-tone RU, MRU including the 59 26-tone RU and the 26 52-tone RU, MRU including the 68 26-tone RU and the 30 52-tone RU, MRU including the 26-tone RU of 77 and the 52-tone RU of 34, MRU including the 26-tone RU of 86 and the 52-tone RU of 38, MRU including the 26-tone RU of 95 and the 52-tone RU of 42, MRU including the 26-tone RU of 104 and the 52-tone RU of 46, The MRU includes the 26-tone RU of 113 and the 52-tone RU of 50, the MRU includes the 26-tone RU of 122 and the 52-tone RU of 54, the MRU includes the 26-tone RU of 131 and the 52-tone RU of 58, and the MRU includes the 26-tone RU of 140 and the 52-tone RU of 62, The aforementioned 106 + 26 - tone MRU combination is, MRU including the fifth 26-tone RU and the first 106-tone RU, MRU including the 14th 26-tone RU and the fourth 106-tone RU, MRU including the 23rd 26-tone RU and the fifth 106-tone RU, MRU including the 32nd 26-tone RU and the eighth 106-tone RU, MRU including the 41 26-tone RU and the 9 106-tone RU, MRU including the 50 26-tone RU and the 12 106-tone RU, MRU including the 59 26-tone RU and the 13 106-tone RU, MRU including the 68 26-tone RU and the 16 106-tone RU, MRU including the 77th 26-tone RU and the 17th 106-tone RU, MRU including the 86th 26-tone RU and the 20th 106-tone RU, MRU including the 95th 26-tone RU and the 21st 106-tone RU, MRU including the 104th 26-tone RU and the 24th 106-tone RU, The method of claim 8, comprising an MRU including the 26-tone RU of 113 and the 106-tone RU of 25, an MRU including the 26-tone RU of 122 and the 106-tone RU of 28, an MRU including the 26-tone RU of 131 and the 106-tone RU of 29, and an MRU including the 26-tone RU of 140 and the 106-tone RU of 32.

10. The first to 144 26-tone RUs are arranged in order from the lowest frequency 26-tone RU to the highest frequency 26-tone RU. The first to 64th 52-tone RUs are arranged in order from the lowest frequency 52-tone RU to the highest frequency 52-tone RU. The first to thirtieth 106 tone RUs are arranged in order from the lowest frequency 106 tone RU to the highest frequency 106 tone RU. The method according to claim 9, wherein the first to sixteenth 242-tone RUs are arranged in order from the lowest frequency 242-tone RU to the highest frequency 242-tone RU.

11. Based on the fact that the PPDU is a DL (Downlink) OFDMA (Orthogonal Frequency Division Multiple Access) PPDU, the PPDU is an EHT (Extremely High Throughput) MU (Multi User) PPDU, and the EHT MU PPDU is decoded by the receiving STA through the resources excluding the first MRU. The method according to claim 1, wherein, based on the PPDU being an UL (Uplink) OFDMA PPDU, the PPDU is an EHT TB (Trigger Based) PPDU, and the EHT TB PPDU is transmitted by the transmitting STA through the resources excluding the first MRU.

12. In a wireless LAN (WLAN) system, at the receiving STA (station), Memory and Transmitter and receiver, The memory and the transceiver are coupled to a processor which can be operated with the memory and the transceiver, and the processor is Receive PPDU (Physical Protocol Data Unit) from the transmitting STA, It is configured to decode the PPDU, The receiving STA is a non-AP STA operating at 20 MHz. The aforementioned 20MHz non-AP STA does not support the first MRU (multiple-resource unit), Based on the fact that the bandwidth of the PPDU is 40 MHz, the bandwidth of the PPDU is composed of 26 tone RUs from the 1st to the 18th, 52 tone RUs from the 1st to the 8th, 106 tone RUs from the 1st to the 4th, or 242 tone RUs from the 1st and 2nd. The first MRU includes a first MRU type and a second MRU type, The first MRU type is the 52+26-tone MRU corresponding to the MRU combination of the 52+26-tone MRU, The MRU combination of the aforementioned 52+26-tone MRU includes an MRU comprising the second 52-tone MRU and the fifth 26-tone MRU, and an MRU comprising the sixth 52-tone MRU and the fourteenth 26-tone MRU. The second MRU type is the 106+26-tone MRU corresponding to the MRU combination of the 106+26-tone MRU, The MRU combination of the 106+26-tone MRU includes an MRU comprising the first 106-tone MRU and the fifth 26-tone MRU, an MRU comprising the second 106-tone MRU and the fifth 26-tone MRU, an MRU comprising the third 106-tone MRU and the fourteenth 26-tone MRU, and an MRU comprising the fourth 106-tone MRU and the fourteenth 26-tone MRU, and a receiving STA.

13. In a method for a wireless LAN (WLAN) system, The transmitting STA (station) generates a PPDU (Physical Protocol Data Unit), The transmitting STA includes the step of transmitting the PPDU to the receiving STA, The receiving STA is a non-AP STA operating at 20 MHz. The aforementioned 20MHz non-AP STA does not support the first MRU (multiple-resource unit), Based on the fact that the bandwidth of the PPDU is 40 MHz, the bandwidth of the PPDU is composed of 26 tone RUs from the 1st to the 18th, 52 tone RUs from the 1st to the 8th, 106 tone RUs from the 1st to the 4th, or 242 tone RUs from the 1st and 2nd. The first MRU includes a first MRU type and a second MRU type, The first MRU type is the 52+26-tone MRU corresponding to the MRU combination of the 52+26-tone MRU, The MRU combination of the aforementioned 52+26-tone MRU includes an MRU comprising the second 52-tone MRU and the fifth 26-tone MRU, and an MRU comprising the sixth 52-tone MRU and the fourteenth 26-tone MRU. The second MRU type is the 106+26-tone MRU corresponding to the MRU combination of the 106+26-tone MRU, The method for the 106+26-tone MRU combination includes an MRU comprising the first 106-tone MRU and the fifth 26-tone MRU, an MRU comprising the second 106-tone MRU and the fifth 26-tone MRU, an MRU comprising the third 106-tone MRU and the fourteenth 26-tone MRU, and an MRU comprising the fourth 106-tone MRU and the fourteenth 26-tone MRU.

14. The first to eighteen 26-tone RUs are arranged in order from the lowest frequency 26-tone RU to the highest frequency 26-tone RU. The first to eighth 52-tone RUs are arranged in order from the lowest frequency 52-tone RU to the highest frequency 52-tone RU, The first to fourth 106-tone RUs are arranged in order from the lowest frequency 106-tone RU to the highest frequency 106-tone RU. The method according to claim 13, wherein the first and second 242-tone RUs are arranged in order from the lowest frequency 242-tone RU to the highest frequency 242-tone RU.

15. Based on the fact that the bandwidth of the PPDU, which is 80 MHz, is composed of 26 tone RUs from the 1st to the 36th, 52 tone RUs from the 1st to the 16th, 106 tone RUs from the 1st to the 8th, or 242 tone RUs from the 1st to the 4th, The MRU combination of the 52+26-tone MRU includes an MRU comprising the 5th 26-tone MRU and the 2nd 52-tone MRU, an MRU comprising the 14th 26-tone MRU and the 6th 52-tone MRU, an MRU comprising the 23rd 26-tone MRU and the 10th 52-tone MRU, and an MRU comprising the 32nd 26-tone MRU and the 14th 52-tone MRU. The method according to claim 13, wherein the MRU combination of the 106+26-tone MRU includes an MRU comprising the fifth 26-tone MRU and the first 106-tone MRU, an MRU comprising the fourteenth 26-tone MRU and the fourth 106-tone MRU, an MRU comprising the 23rd 26-tone MRU and the fifth 106-tone MRU, and an MRU comprising the 32nd 26-tone MRU and the eighth 106-tone MRU.

16. The first to thirtieth 26-tone RUs are arranged in order from the lowest frequency 26-tone RU to the highest frequency 26-tone RU. The first to sixteenth 52-tone RUs are arranged in order from the lowest frequency 52-tone RU to the highest frequency 52-tone RU. The first to eighth 106-tone RUs are arranged in order from the lowest frequency 106-tone RU to the highest frequency 106-tone RU. The method according to claim 15, wherein the first to fourth 242 tone RUs are arranged in order from the lowest frequency 242 tone RU to the highest frequency 242 tone RU.

17. Based on the fact that the bandwidth of the PPDU, which is 160 MHz, includes the first and second 80 MHz subchannels, The first 80MHz subchannel includes 26 tone RUs from the 1st to the 36th, 52 tone RUs from the 1st to the 16th, 106 tone RUs from the 1st to the 8th, or 242 tone RUs from the 1st to the 4th. The method according to claim 13, wherein the second 80 MHz subchannel includes 26 tone RUs from the 37th to the 72nd, 52 tone RUs from the 17th to the 32nd, 106 tone RUs from the 9th to the 16th, or 242 tone RUs from the 5th to the 8th.

18. The aforementioned 52+26-tone MRU combination is: MRU including the fifth 26-tone RU and the second 52-tone RU, MRU including the fourteenth 26-tone RU and the sixth 52-tone RU, MRU including the twenty-third 26-tone RU and the tenth 52-tone RU, MRU including the thirty-second 26-tone RU and the fourteenth 52-tone RU, The MRU includes the 41 26-tone RU and the 18 52-tone RU, the MRU includes the 50 26-tone RU and the 22 52-tone RU, the MRU includes the 59 26-tone RU and the 26 52-tone RU, and the MRU includes the 68 26-tone RU and the 30 52-tone RU, The aforementioned 106 + 26 - tone MRU combination is, MRU including the fifth 26-tone RU and the first 106-tone RU, MRU including the 14th 26-tone RU and the fourth 106-tone RU, MRU including the 23rd 26-tone RU and the fifth 106-tone RU, MRU including the 32nd 26-tone RU and the eighth 106-tone RU, The method according to claim 17, comprising an MRU including the 41st 26-tone RU and the 9th 106-tone RU, an MRU including the 50th 26-tone RU and the 12th 106-tone RU, an MRU including the 59th 26-tone RU and the 13th 106-tone RU, and an MRU including the 68th 26-tone RU and the 16th 106-tone RU.

19. In a wireless LAN (WLAN) system, in the transmitting station (STA), Memory and Transmitter and receiver, The memory and the transceiver are coupled to a processor which can be operated with the memory and the transceiver, and the processor is Generate a PPDU (Physical Protocol Data Unit), It is configured to transmit the PPDU to the receiving STA, The receiving STA is a non-AP STA operating at 20 MHz. The aforementioned 20MHz non-AP STA does not support the first MRU (multiple-resource unit), Based on the fact that the bandwidth of the PPDU is 40 MHz, the bandwidth of the PPDU is composed of 26 tone RUs from the 1st to the 18th, 52 tone RUs from the 1st to the 8th, 106 tone RUs from the 1st to the 4th, or 242 tone RUs from the 1st and 2nd. The first MRU includes a first MRU type and a second MRU type, The first MRU type is the 52+26-tone MRU corresponding to the MRU combination of the 52+26-tone MRU, The MRU combination of the aforementioned 52+26-tone MRU includes an MRU comprising the second 52-tone MRU and the fifth 26-tone MRU, and an MRU comprising the sixth 52-tone MRU and the fourteenth 26-tone MRU. The second MRU type is the 106+26-tone MRU corresponding to the MRU combination of the 106+26-tone MRU, The MRU combination of the 106+26-tone MRU includes a transmitting STA comprising an MRU containing the first 106-tone MRU and the fifth 26-tone MRU, an MRU containing the second 106-tone MRU and the fifth 26-tone MRU, an MRU containing the third 106-tone MRU and the fourteenth 26-tone MRU, and an MRU containing the fourth 106-tone MRU and the fourteenth 26-tone MRU.

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