METHOD AND APPARATUS FOR RECEIVING PPDU BY MULTIPLE RUs IN WIRELESS LAN SYSTEM

Abstract

The present disclosure relates to a method and an apparatus for receiving a PPDU by a plurality of RUs in a wireless LAN system. A method and an apparatus for receiving a PPDU in a wireless LAN system are presented. In particular, a receiving STA receives a PPDU from a transmitting STA over a broadband and decodes the PPDU. The PPDU includes a control field and a data field. When the broadband is a 320 / 160 + 160 MHz band including a first 80 MHz sub-channel to a fourth 80 MHz sub-channel, the first 80 MHz sub-channel includes a first 996 RU, the second 80 MHz sub-channel includes a second 996 RU, the third 80 MHz sub-channel includes a third 996 RU, and the fourth 80 MHz sub-channel includes a first 484 RU. The data field is received by a first plurality of RUs in which the first 996 RU to the third 996 RU and the first 484 RU are aggregated.

Description

[0001] This application is a divisional application of the patent application with application number 202080093215.6 (PCT / KR2020 / 016456) filed on July 15, 2022, with an international application date of November 20, 2020, and the invention name being “Method and device for receiving PPDU through multiple RUs in a wireless LAN system”. Technical Field

[0002] The present disclosure relates to a technology for receiving PPDUs through multiple RUs in a WLAN system, and more particularly, to a method and apparatus for transmitting and receiving PPDUs in a non-OFDMA scheme through a combination of multiple RUs aggregated into a large RU. Background Art

[0003] Wireless local area networks (WLANs) are improved in various ways. For example, the IEEE 802.11ax standard proposes an improved communication environment using orthogonal frequency division multiple access (OFDMA) and downlink multi-user multiple input multiple output (DL MU MIMO) technology.

[0004] This specification proposes technical features that can be utilized in new communication standards. For example, the new communication standard may be the Extremely High Throughput (EHT) standard currently under discussion. The EHT standard may use newly proposed increased bandwidth, enhanced PHY layer protocol data unit (PPDU) structure, enhanced sequencing, hybrid automatic repeat request (HARQ) scheme, etc. The EHT standard may be referred to as the IEEE 802.11be standard.

[0005] In new wireless LAN standards, an increased number of spatial streams may be used. In this case, in order to properly use the increased number of spatial streams, it may be necessary to improve the signaling technology in the WLAN system. Summary of the Invention

[0006] Technical issues

[0007] The present disclosure proposes a method and apparatus for receiving PPDUs through multiple RUs in a WLAN system.

[0008] Technical Solution

[0009] An example of this specification proposes a method for receiving a PPDU through multiple RUs.

[0010] This embodiment can be implemented in a network environment supporting a next-generation wireless LAN system (e.g., IEEE 802.11be or EHT wireless LAN system). The next-generation wireless LAN system is an improved wireless LAN system from the 802.11ax system and can meet backward compatibility with the 802.11ax system.

[0011] This embodiment provides a method and apparatus for transmitting and receiving PPDUs based on multiple RUs configured by combining large RUs. In this context, a large RU refers to a resource unit with more than 242 tones. Specifically, this embodiment provides a method for configuring multiple RUs for transmitting PPDUs in a non-OFDMA scheme.

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

[0013] The receiving STA decodes the PPDU.

[0014] The PPDU includes a control field and a data field.

[0015] When the broadband is a 320 / 160+160 MHz frequency band including a first 80 MHz subchannel to a fourth 80 MHz subchannel, the first 80 MHz subchannel includes a first 996 resource units (RUs), and the second 80 MHz subchannel includes a second 996 RUs, the third 80 MHz subchannel includes a third 996 RUs, and the fourth 80 MHz subchannel includes a first 484 RUs.

[0016] The data field is received via a first plurality of RUs, in which the first through third 996RUs and the first 484RU are aggregated. That is, the data field can be received via a plurality of RUs, in which three 996RUs and one 484RU are aggregated. As described above, the broadband may include four 80 MHz subchannels. Three 996RUs and one 484RU may be allocated to each of the four 80 MHz subchannels. In this case, the first through third 996RUs may be RUs consisting of 996 tones, and the first 484RU may be RUs consisting of 484 tones.

[0017] Technical Effects

[0018] According to the embodiments proposed in this specification, there is a new effect of increasing transmission efficiency and throughput by supporting preamble puncturing and aggregation of large RUs of various sizes in non-OFDMA. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This shows an example of a transmitting device and / or a receiving device in this specification.

[0020] Figure 2 is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0021] Figure 3 Diagram illustrates the general link setup process.

[0022] Figure 4 An example of PPDU used in the IEEE standard is illustrated.

[0023] Figure 5 The diagram shows the layout of resource units (RUs) used in a 20 MHz frequency band.

[0024] Figure 6 The diagram shows the layout of resource units (RUs) used in a 40 MHz frequency band.

[0025] Figure 7 The diagram shows the layout of resource units (RUs) used in an 80 MHz frequency band.

[0026] Figure 8 The structure of the HE-SIG-B field is shown.

[0027] Figure 9 The diagram shows an example of allocating multiple user STAs to the same RU through the MU-MIMO solution.

[0028] Figure 10 The diagram illustrates an operation based on UL-MU.

[0029] Figure 11 An example of a trigger frame is illustrated.

[0030] Figure 12 An example of the common information field of the trigger frame is illustrated.

[0031] Figure 13 An example of subfields included in each user information field is illustrated.

[0032] Figure 14 The technical features of the UORA scheme are described.

[0033] Figure 15 An example of channels used / supported / defined in the 2.4 GHz frequency band is illustrated.

[0034] Figure 16 An example of channels used / supported / defined in the 5 GHz frequency band is illustrated.

[0035] Figure 17 An example of channels used / supported / defined in the 6 GHz band is illustrated.

[0036] Figure 18The diagram illustrates an example of a PPDU used in this specification.

[0037] Figure 19 An example of a modified transmitting device and / or receiving apparatus / device of the present specification is illustrated.

[0038] Figure 20 An example of a PHY transmission procedure for a HE SU PPDU is shown.

[0039] Figure 21 An example of a block diagram of a transmitting device for generating each field of an HE PPDU is shown.

[0040] Figure 22 An 80 MHz channel structure is shown.

[0041] Figure 23 An example of preamble puncturing in non-OFDMA 80 MHz transmission is shown.

[0042] Figure 24 An example of additional preamble puncturing in non-OFDMA 80 MHz transmission is shown.

[0043] Figure 25 An example of a 160 / 80+80 MHz channel configuration is shown.

[0044] Figure 26 This is an example of 240 / 160+80 MHz derived from a continuous 320 MHz.

[0045] Figure 27 This is an example of a continuous 240 MHz being derived from a continuous 320 MHz.

[0046] Figure 28 It is an example of non-contiguous 160+80 MHz derived from non-contiguous 160+160 MHz.

[0047] Figure 29 A channel structure of 320 / 160+160 MHz is shown.

[0048] Figure 30 An example of the EHT PPDU format is shown.

[0049] Figure 31 An example of the U-SIG format is shown.

[0050] Figure 32 is a flowchart illustrating the operation of the transmitting apparatus according to the present embodiment.

[0051] Figure 33 is a flowchart illustrating the operation of the receiving apparatus according to the present embodiment.

[0052] Figure 34 is a flowchart illustrating a process in which a transmitting STA transmits a PPDU according to the present embodiment.

[0053] Figure 35 is a flowchart illustrating a process for a receiving STA to receive a PPDU according to the present embodiment. DETAILED DESCRIPTION

[0054] In this specification, "A or B" may mean "only A," "only B," or "both A and B." In other words, in this specification, "A or B" may be interpreted as "A and / or B." For example, in this specification, "A, B, or C" may mean "only A," "only B," "only C," or "any combination of A, B, and C."

[0055] As used herein, a slash ( / ) or a comma may mean "and / or." For example, "A / B" may mean "A and / or B." Thus, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B, or C."

[0056] In this specification, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in this specification, the expression “at least one of A or B” or “at least one of A and / or B” may be interpreted as “at least one of A and B”.

[0057] In addition, in this specification, “at least one of A, B, and C” may mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.” In addition, “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.”

[0058] In addition, brackets used in this specification may mean "for example." Specifically, when indicated as "control information (EHT-signal)", it may mean that "EHT-signal" is proposed as an example of "control information." In other words, "control information" in this specification is not limited to "EHT-signal," and "EHT-signal" can be proposed as an example of "control information." In addition, when indicated as "control information (i.e., EHT-signal)", it may also mean that "EHT-signal" is proposed as an example of "control information."

[0059] Technical features described separately in one drawing of this specification may be implemented separately or simultaneously.

[0060] The following examples of this specification can be applied to various wireless communication systems. For example, the following examples of this specification can be applied to wireless local area network (WLAN) systems. For example, this specification can be applied to IEEE 802.11a / g / n / ac standards or IEEE 802.11ax standards. In addition, this specification can also be applied to the newly proposed EHT standard or IEEE 802.11be standard. In addition, the examples of this specification can also be applied to new WLAN standards enhanced from the EHT standard or IEEE 802.11be standard. In addition, the examples of this specification can be applied to mobile communication systems. For example, it can be applied to long term evolution (LTE) based on the 3rd Generation Partnership Project (3GPP) standard and a mobile communication system based on the evolution of LTE. In addition, the examples of this specification can be applied to a communication system based on the 5G NR standard of the 3GPP standard.

[0061] Hereinafter, in order to describe the technical features of the present specification, technical features applicable to the present specification will be described.

[0062] Figure 1 This shows an example of a transmitting device and / or a receiving device in this specification.

[0063] exist Figure 1 In the example, various technical features described below can be performed. Figure 1 At least one station (STA) is involved. For example, the STAs 110 and 120 in this specification may also be referred to by various terms such as mobile terminals, wireless devices, wireless transmit / receive units (WTRUs), user equipment (UEs), mobile stations (MSs), mobile subscriber units, or simply users. The STAs 110 and 120 in this specification may also be referred to by various terms such as networks, base stations, Node Bs, access points (APs), repeaters, routers, and relays. The STAs 110 and 120 in this specification may also be referred to by various names such as receiving devices, transmitting devices, receiving STAs, transmitting STAs, receiving devices, and transmitting devices.

[0064] For example, the STAs 110 and 120 may function as APs or non-APs. That is, the STAs 110 and 120 of this specification may function as APs and / or non-APs.

[0065] In addition to the IEEE 802.11 standard, the STAs 110 and 120 of this specification can support various communication standards. For example, communication standards based on 3GPP standards (e.g., LTE, LTE-A, 5G NR standards) can be supported. In addition, the STAs of this specification can be implemented as various devices such as mobile phones, vehicles, and personal computers. In addition, the STAs of this specification can support communication for various communication services such as voice calls, video calls, data communications, and self-driving (autonomous driving).

[0066] The STAs 110 and 120 of the present specification may include a medium access control (MAC) compliant with the IEEE 802.11 standard and a physical layer interface for a radio medium.

[0067] The following will refer to Figure 1 STAs 110 and 120 are described in sub-figure (a) of FIG.

[0068] The first STA 110 may include a processor 111, a memory 112, and a transceiver 113. The illustrated processor, memory, and transceiver may be individually implemented as separate chips, or at least two blocks / functions may be implemented by a single chip.

[0069] The transceiver 113 of the first STA performs signal transmission / reception operations, and specifically, can transmit / receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be, etc.).

[0070] For example, the first STA 110 may perform operations expected by the AP. For example, the AP's processor 111 may receive signals via the transceiver 113, process the received (RX) signals, generate transmitted (TX) signals, and provide control over signal transmission. The AP's memory 112 may store signals received via the transceiver 113 (e.g., RX signals) and may store signals to be transmitted via the transceiver (e.g., TX signals).

[0071] For example, the second STA 120 can perform operations expected by a non-AP STA. For example, the non-AP transceiver 123 can perform signal transmission / reception operations. Specifically, it can transmit / receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be packets, etc.).

[0072] For example, the processor 121 of the non-AP STA may receive a signal through the transceiver 123, process the RX signal, generate a TX signal, and provide control for signal transmission. The memory 122 of the non-AP STA may store a signal (e.g., an RX signal) received through the transceiver 123 and may store a signal (e.g., a TX signal) to be transmitted through the transceiver.

[0073] For example, the operation of a device indicated as an AP in the following description may be performed in the first STA 110 or the second STA 120. For example, if the first STA 110 is an AP, the operation of the device indicated as the AP may be controlled by the processor 111 of the first STA 110, and related signals may be transmitted or received through the transceiver 113 controlled by the processor 111 of the first STA 110. In addition, control information related to the operation of the AP or the AP's TX / RX signals may be stored in the memory 112 of the first STA 110. In addition, if the second STA 120 is an AP, the operation of the device indicated as the AP may be controlled by the processor 121 of the second STA 120, and related signals may be transmitted or received through the transceiver 123 controlled by the processor 121 of the second STA 120. In addition, control information related to the operation of the AP or the AP's TX / RX signals may be stored in the memory 122 of the second STA 120.

[0074] For example, in the following description, the operation of a device indicated as a non-AP (or user STA) may be performed in the first STA 110 or the second STA 120. For example, if the second STA 120 is a non-AP, the operation of the device indicated as the non-AP may be controlled by the processor 121 of the second STA 120, and related signals may be transmitted or received through the transceiver 123 controlled by the processor 121 of the second STA 120. In addition, control information related to the operation of the non-AP or the TX / RX signal of the non-AP may be stored in the memory 122 of the second STA 120. For example, if the first STA 110 is a non-AP, the operation of the device indicated as the non-AP may be controlled by the processor 111 of the first STA 110, and related signals may be transmitted or received through the transceiver 113 controlled by the processor 111 of the first STA 110. In addition, control information related to the operation of the non-AP or the TX / RX signal of the non-AP may be stored in the memory 112 of the first STA 110.

[0075] In the following description, devices referred to as (transmitting / receiving) STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmitting / receiving) terminal, (transmitting / receiving) device, (transmitting / receiving) apparatus, network, etc. may imply Figure 1 For example, devices indicated as (transmitting / receiving) STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmitting / receiving) terminal, (transmitting / receiving) device, (transmitting / receiving) apparatus, network, etc. (but without specific numbers) may imply Figure 1 For example, in the following example, the operations of various STAs transmitting / receiving signals (eg, PPDU) may be performed in Figure 1 In addition, in the following examples, the operations of various STAs generating TX / RX signals or performing data processing and calculations in advance for TX / RX signals can be performed in Figure 1 11 and 121. For example, examples of operations for generating TX / RX signals or performing data processing and calculation in advance may include: 1) determining / obtaining / configuring / calculating / decoding / encoding bit information of subfields (SIG, STF, LTF, data) included in the PPDU; 2) determining / configuring / obtaining time resources or frequency resources (e.g., subcarrier resources) for the subfields (SIG, STF, LTF, data) included in the PPDU; 3) determining / configuring / obtaining a specific sequence (e.g., a pilot sequence, an STF / LTF sequence, an additional sequence applied to the SIG) for the subfields (SIG, STF, LTF, data) included in the PPDU; 4) power control operations and / or power saving operations applied to STAs; and 5) operations related to determining / obtaining / configuring / decoding / encoding of ACK signals. In addition, in the following examples, various information (e.g., information related to fields / subfields / control fields / parameters / power, etc.) used by various STAs to determine / obtain / configure / calculate / decode / encode TX / RX signals may be stored in Figure 1 in memories 112 and 122 .

[0076] Figure 1 The aforementioned device / STA of sub-graph (a) can be as follows Figure 1 In the following, we will modify the Figure 1 Sub-figure (b) of FIG. 1 is used to describe STA 110 and STA 120 of this specification.

[0077] For example, Figure 1The transceivers 113 and 123 shown in the sub-diagram (b) can perform the same Figure 1 The same functions as the aforementioned transceiver shown in sub-figure (a) of FIG. Figure 1 The processing chips 114 and 124 shown in sub-figure (b) may include processors 111 and 121 and memories 112 and 122 . Figure 1 The processors 111 and 121 and the memories 112 and 122 shown in the sub-diagram (b) of FIG. Figure 1 The aforementioned processors 111 and 121 and memories 112 and 122 shown in sub-Figure (a) have the same functions.

[0078] The 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 unit, transmitting unit, receiving STA, transmitting STA, receiving device, transmitting device, receiving apparatus and / or transmitting apparatus described below may mean Figure 1 STAs 110 and 120 shown in sub-figures (a) / (b) of FIG. 110 and 120, or may mean Figure 1 The processing chips 114 and 124 shown in the sub-figure (b) of FIG. In other words, the technical features of this specification can be Figure 1 The STA 110 and 120 shown in the sub-figures (a) / (b) of FIG. 110 and 120 may be executed only in Figure 1 The processing chips 114 and 124 shown in the sub-figure (b) of FIG. Figure 1 For example, the technical feature of sending a control signal from a STA can be understood as the transceiver 113 and 123 shown in the sub-figure (a) / (b) of FIG. Figure 1 The transceiver 113 shown in the sub-figures (a) / (b) of FIG. Figure 1 Alternatively, the technical feature of the control signal generated by the processors 111 and 121 illustrated in the sub-figures (a) / (b) of FIG. 1 may be understood as the technical feature of the control signal generated by the processors 111 and 121. Figure 1 The technical features of the processing chips 114 and 124 shown in sub-figure (b) of FIG. 10 are those for generating control signals to be transmitted to the transceivers 113 and 123 .

[0079] For example, the technical feature of receiving the control signal by the receiving STA can be understood as Figure 1 Alternatively, the technical feature of the receiving STA receiving the control signal can be understood as the technical feature of the receiving STA receiving the control signal through Figure 1 The processors 111 and 121 shown in the sub-diagram (a) of Figure 1Alternatively, the technical feature of the receiving STA receiving the control signal can be understood as the technical feature of the control signal received by the transceiver 113 and 123 shown in the sub-figure (a) of FIG. Figure 1 The processing chips 114 and 124 shown in the sub-graph (b) of FIG. Figure 1 Technical characteristics of the control signals received in transceivers 113 and 123 shown in sub-figure (b).

[0080] refer to Figure 1 , software codes 115 and 125 may be included in memories 112 and 122. The software codes 115 and 125 may include instructions for controlling operations of the processors 111 and 121. The software codes 115 and 125 may be included as various programming languages.

[0081] Figure 1 The processors 111 and 121 or the processing chips 114 and 124 may include application specific integrated circuits (ASICs), other chipsets, logic circuits and / or data processing devices. The processor may be an application processor (AP). For example, Figure 1 The processors 111 and 121 or the processing chips 114 and 124 may include at least one of the following: a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), and a modulator and demodulator (modem). For example, Figure 1 The processors 111 and 121 or the processing chips 114 and 124 may be composed of SNAPDRAGONTM processor series manufactured by EXYNOSTM processor series manufactured by Processor family manufactured by HELIOTM processor series manufactured by The ATOMTM processor series manufactured by or enhanced from these processors.

[0082] In this specification, the uplink may refer to a link for communication from a non-AP STA to an SP STA, and uplink PPDUs / packets / signals, etc. may be transmitted through the uplink. In addition, in this specification, the downlink may refer to a link for communication from an AP STA to a non-AP STA, and downlink PPDUs / packets / signals, etc. may be transmitted through the downlink.

[0083] Figure 2 is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0084] Figure 2The upper portion of the diagram illustrates the structure of an infrastructure basic service set (BSS) of the Institute of Electrical and Electronics Engineers (IEEE) 802.11.

[0085] refer to Figure 2 The wireless LAN system may include one or more infrastructure BSSs 200 and 205 (hereinafter referred to as BSSs). BSSs 200 and 205, which are a collection of APs and STAs (e.g., access point (AP) 225 and station (STA1) 200-1) that have successfully synchronized to communicate with each other, do not represent a specific area. BSS 205 may include one or more STAs 205-1 and 205-2 that can join one AP 230.

[0086] The BSS may include at least one STA, an AP providing a distributed service, and a distribution system (DS) 210 connecting a plurality of APs.

[0087] The distribution system 210 may implement an extended service set (ESS) 240 that is extended by connecting a plurality of BSSs 200 and 205. The ESS 240 may be used as a term indicating one network configured by connecting one or more APs 225 or 230 via the distribution system 210. APs included in one ESS 240 may have the same service set identifier (SSID).

[0088] The portal 220 may serve as a bridge connecting a wireless LAN network (IEEE 802.11) and another network (eg, 802.X).

[0089] exist Figure 2 In the BSS shown in the upper portion of FIG, a network between APs 225 and 230 and a network between APs 225 and 230 and STAs 200-1, 205-1, and 205-2 can be implemented. However, a network can be configured between STAs to perform communication even without APs 225 and 230. A network that performs communication by configuring a network between STAs even without APs 225 and 230 is defined as an ad hoc network or an independent basic service set (IBSS).

[0090] Figure 2 The lower part of the diagram shows a conceptual diagram illustrating IBSS.

[0091] refer to Figure 2The IBSS is a BSS operating in self-organizing mode. Because the IBSS does not include an access point (AP), there is no centralized management entity that performs management functions. That is, in the IBSS, STAs 250-1, 250-2, 250-3, 255-4, and 255-5 are managed in a distributed manner. In the IBSS, all STAs 250-1, 250-2, 250-3, 255-4, and 255-5 can be mobile STAs and are not allowed to access the DS, forming a self-contained network.

[0092] Figure 3 The figure shows the general link establishment process.

[0093] In S310, the STA may perform a network discovery operation. The network discovery operation may include a scanning operation by the STA. That is, in order to access a network, the STA needs to discover participating networks. Before joining a wireless network, the STA needs to identify compatible networks. The process of identifying networks in a specific area is called scanning. Scanning methods include active scanning and passive scanning.

[0094] Figure 3 The diagram shows a network discovery operation including an active scanning process. In active scanning, the STA performing the scan sends a probe request frame and waits for a response to the probe request frame in order to identify which AP is around while moving to a channel. The responder sends a probe response frame to the STA that has sent the probe request frame as a response to the probe request frame. Here, the responder may be the STA that sent the last beacon frame in the BSS of the channel being scanned. In the BSS, since the AP sends the beacon frame, the AP is the responder. In the IBSS, since the STAs in the IBSS take turns sending beacon frames, the responder is not fixed. For example, when a STA sends a probe request frame via channel 1 and receives a probe response frame via channel 1, the STA may store the BSS-related information included in the received probe response frame, may move to the next channel (e.g., channel 2), and may perform scanning by the same method (e.g., sending a probe request and receiving a probe response via channel 2).

[0095] although Figure 3Not shown in the figure, scanning can be performed by a passive scanning method. In passive scanning, the STA performing the scan can wait for a beacon frame while moving to a channel. The beacon frame is one of the management frames in IEEE 802.11 and is periodically sent to indicate the existence of a wireless network and enable the STA performing the scan to find the wireless network and join the wireless network. In the BSS, the AP is used to periodically send beacon frames. In the IBSS, the STAs in the IBSS take turns sending beacon frames. Upon receiving the beacon frame, the STA performing the scan stores information about the BSS included in the beacon frame and records the beacon frame information in each channel while moving to another channel. The STA that receives the beacon frame can store the BSS-related information included in the received beacon frame, can move to the next channel, and can perform scanning in the next channel by the same method.

[0096] After discovering the network, the STA may perform an authentication process in S320. This authentication process may be referred to as the first authentication process to clearly distinguish it from the subsequent security establishment operation in S340. The authentication process in S320 may include a process in which the STA sends an authentication request frame to the AP, and the AP sends an authentication response frame to the STA in response. The authentication frames used for authentication requests / responses are management frames.

[0097] The authentication frame may include information about an authentication algorithm number, an authentication transaction sequence number, a status code, a challenge text, a robust security network (RSN), and a limited round-robin group.

[0098] The STA may send an authentication request frame to the AP. The AP may determine whether to allow authentication of the STA based on the information included in the received authentication request frame. The AP may provide the authentication process result to the STA via an authentication response frame.

[0099] When the STA is successfully authenticated, the STA may perform an association process in S330. The association process includes a process in which the STA sends an association request frame to the AP and the AP sends an association response frame to the STA in response. For example, the association request frame may include information about various capabilities, a beacon listening interval, a service set identifier (SSID), supported rates, supported channels, RSN, mobility domain, supported operation category, a traffic indication map (TIM) broadcast request, and interworking service capabilities. For example, the association response frame may include information about various capabilities, a status code, an association ID (AID), supported rates, an enhanced distributed channel access (EDCA) parameter set, a received channel power indicator (RCPI), a received signal-to-noise ratio indicator (RSNI), a mobility domain, a timeout interval (association recovery time), overlapping BSS scan parameters, a TIM broadcast response, and a QoS map.

[0100] In S340, the STA may perform a security establishment process. The security establishment process in S340 may include a process of establishing a private key through a four-way handshake (eg, through an Extensible Authentication Protocol over LAN (EAPOL) frame).

[0101] Figure 4 An example of a PPDU used in the IEEE standard is shown.

[0102] As shown, various types of PHY protocol data units (PPDUs) are used in the IEEE a / g / n / ac standards. Specifically, LTF and STF include training signals, SIG-A and SIG-B include control information for receiving STAs, and the data field includes user data corresponding to PSDU (MAC PDU / aggregated MAC PDU).

[0103] Figure 4 An example of HE PPDU according to IEEE 802.11ax is also included. Figure 4 The HE PPDU is an exemplary PPDU for multiple users. The HE-SIG-B may be included only in the PPDU for multiple users and may be omitted in the PPDU for a single user.

[0104] like Figure 4 As shown, the HE-PPDU for multiple users (MUs) may include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a high-efficiency signal A (HE-SIG A), a high-efficiency signal B (HE-SIG B), a high-efficiency short training field (HE-STF), a high-efficiency long training field (HE-LTF), a data field (alternatively, a MAC payload), and a packet extension (PE) field. Each field may be transmitted within the time period shown (i.e., 4 or 8 μs).

[0105] The following describes a resource unit (RU) used for a PPDU. A RU can include multiple subcarriers (or tones). A RU can be used to transmit signals to multiple STAs using OFDMA. Furthermore, a RU can be defined as transmitting signals to a single STA. A RU can be used for the STF, LTF, data field, and more.

[0106] Figure 5 The diagram shows the layout of resource units (RUs) used in a 20 MHz frequency band.

[0107] like Figure 5As shown, resource units (RUs) corresponding to different numbers of tones (i.e., subcarriers) can be used to form some fields of the HE-PPDU. For example, resources can be allocated for the HE-STF, HE-LTF, and data fields in the RU shown.

[0108] like Figure 5 As shown in the uppermost portion of FIG, 26 units (i.e., units corresponding to 26 tones) can be arranged. Six tones can be used for a guard band in the leftmost band of the 20 MHz band, and five tones can be used for a guard band in the rightmost band of the 20 MHz band. In addition, seven DC tones can be inserted in the center band (i.e., the DC band), and 26 units corresponding to 13 tones on each side of the left and right sides of the DC band can be arranged. 26 units, 52 units, and 106 units can be allocated to other frequency bands. Each unit can be allocated to a receiving STA (i.e., a user).

[0109] Figure 5 The layout of the RU in can be used not only for multiple users (MU) but also for single users (SU), in which case one 242 unit can be used and three DC tones can be inserted, as shown in FIG. Figure 5 As shown at the bottom.

[0110] although Figure 5 RUs of various sizes are proposed, namely, 26-RU, 52-RU, 106-RU, and 242-RU, but RUs of a particular size may be expanded or increased. Therefore, the present embodiment is not limited to a particular size of each RU (ie, the number of corresponding tones).

[0111] Figure 6 The figure shows the layout of RUs used in the 40 MHz frequency band.

[0112] Similar to using RUs with various sizes Figure 5 ,exist Figure 6 In the example, 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, etc. can be used. In addition, five DC tones can be inserted in the center frequency, 12 tones can be used for a guard band in the leftmost band of the 40 MHz band, and 11 tones can be used for a guard band in the rightmost band of the 40 MHz band.

[0113] like Figure 6 As shown, when the RU layout is used for a single user, 484-RU can be used. The specific number of RUs can be similar to Figure 5 Change.

[0114] Figure 7 The figure shows the layout of RUs used in the 80 MHz frequency band.

[0115] Similar to using RUs with various sizes Figure 5 and Figure 6 ,exist Figure 7 Examples of the 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, and the like can be used. Furthermore, seven DC tones can be inserted into the center frequency, 12 tones can be used for a guard band in the leftmost band of the 80 MHz band, and 11 tones can be used for a guard band in the rightmost band of the 80 MHz band. Furthermore, a 26-RU can be used, corresponding to 13 tones on each side of the DC band.

[0116] like Figure 7 As shown, when the RU layout is for a single user, a 996-RU can be used, in which case five DC tones can be inserted.

[0117] The RUs described in this specification can be used in uplink (UL) communication and downlink (DL) communication. For example, when performing UL-MU communication requested by a trigger frame, the transmitting STA (e.g., AP) can allocate a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to the first STA through the trigger frame, and can allocate a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to the second STA. Thereafter, the first STA can send a first triggered-based PPDU based on the first RU, and the second STA can send a second triggered-based PPDU based on the second RU. The first / second triggered-based PPDUs are sent to the AP in the same (or overlapping) time period.

[0118] For example, when configuring a DL MU PPDU, the transmitting STA (e.g., AP) may allocate a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to the first STA and a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to the second STA. That is, the transmitting STA (e.g., AP) may transmit the HE-STF, HE-LTF, and data fields for the first STA in the first RU of one MU PPDU, and may transmit the HE-STF, HE-LTF, and data fields for the second STA in the second RU.

[0119] Information about the layout of RUs may be signaled via HE-SIG-B.

[0120] Figure 8 The structure of the HE-SIG-B field is shown.

[0121] As shown, the HE-SIG-B field 810 includes a common field 820 and a user-specific field 830. The common field 820 may include information that is commonly applied to all users (i.e., user STAs) receiving the SIG-B. The user-specific field 830 may be referred to as a user-specific control field. When the SIG-B is transmitted to multiple users, the user-specific field 830 may apply only to any one of the multiple users.

[0122] like Figure 8 As shown, the common field 820 and the user-specific field 830 may be encoded separately.

[0123] The common field 820 may include N*8 bits of RU allocation information. For example, the RU allocation information may include information related to the location of the RU. For example, when Figure 5 When a 20 MHz channel is used as shown, the RU allocation information may include information about a specific frequency band where a specific RU (26-RU / 52-RU / 106-RU) is arranged.

[0124] An example of a case where the RU allocation information consists of 8 bits is as follows.

[0125] [Table 1]

[0126]

[0127] like Figure 5 As shown in the example of , up to nine 26-RUs can be allocated to a 20 MHz channel. When the RU allocation information of the common field 820 is set to "00000000" as shown in Table 1, nine 26-RUs can be allocated to the corresponding channel (i.e., 20 MHz). In addition, when the RU allocation information of the common field 820 is set to "00000001" as shown in Table 1, seven 26-RUs and one 52-RU are arranged in the corresponding channel. That is, in Figure 5 In the example of , a 52-RU can be allocated to the far right, and seven 26-RUs can be allocated to its left.

[0128] The example in Table 1 shows only some RU positions where RU allocation information can be displayed.

[0129] For example, the RU allocation information may include the example in Table 2 below.

[0130] [Table 2]

[0131]

[0132] "01000y2y1y0" refers to an example in which a 106-RU is allocated to the leftmost side of a 20 MHz channel and five 26-RUs are allocated to the right thereof. In this case, multiple STAs (e.g., user STAs) can be allocated to the 106-RU based on the MU-MIMO scheme. Specifically, up to eight STAs (e.g., user STAs) can be allocated to the 106-RU, and the number of STAs (e.g., user STAs) allocated to the 106-RU is determined based on the 3-bit information (y2y1y0). For example, when the 3-bit information (y2y1y0) is set to N, the number of STAs (e.g., user STAs) allocated to the 106-RU based on the MU-MIMO scheme can be N+1.

[0133] Typically, multiple STAs (e.g., user STAs) that are different from each other can be assigned to multiple RUs. However, multiple STAs (e.g., user STAs) can be assigned to one or more RUs of at least a specific size (e.g., 106 subcarriers) based on the MU-MIMO scheme.

[0134] like Figure 8 As shown, the user-specific field 830 may include multiple user fields. As described above, the number of STAs (e.g., user STAs) assigned to a specific channel may be determined based on the RU allocation information of the common field 820. For example, when the RU allocation information of the common field 820 is "00000000", one user STA may be assigned to each of the nine 26-RUs (e.g., nine user STAs may be assigned). That is, up to nine user STAs may be assigned to a specific channel using the OFDMA scheme. In other words, up to nine user STAs may be assigned to a specific channel using a non-MU-MIMO scheme.

[0135] For example, when RU allocation is set to "01000y2y1y0", multiple STAs can be allocated to the 106-RU arranged on the leftmost side by the MU-MIMO scheme, and five user STAs can be allocated to the five 26-RUs arranged on its right side by the non-MU MIMO scheme. Figure 9 .

[0136] Figure 9 This figure illustrates an example of allocating multiple user STAs to the same RU through the MU-MIMO scheme.

[0137] For example, when Figure 9When the RU allocation is set to "01000010," a 106-RU can be allocated to the leftmost side of a specific channel, and five 26-RUs can be allocated to its right. Furthermore, three user STAs can be allocated to the 106-RU using the MU-MIMO scheme. Consequently, since eight user STAs are allocated, the user-specific field 830 of the HE-SIG-B can include eight user fields.

[0138] Eight user fields can be pressed Figure 9 In addition, Figure 8 As shown, two user fields can be implemented using one user block field.

[0139] Figure 8 and Figure 9 The user field shown can be configured based on two formats. That is, the user field related to the MU-MIMO scheme can be configured in the first format, and the user field related to the non-MIMO scheme can be configured in the second format. Figure 9 For example, User Field 1 to User Field 3 may be based on the first format, and User Field 4 to User Field 8 may be based on the second format. The first format or the second format may include bit information of the same length (eg, 21 bits).

[0140] Each user field may have the same size (eg, 21 bits). For example, the user field of the first format (the first MU-MIMO scheme) may be configured as follows.

[0141] For example, the first bits (i.e., B0-B10) in the user field (i.e., 21 bits) may include identification information (e.g., STA-ID, partial AID, etc.) of the user STA that allocates the corresponding user field. Furthermore, the second bits (i.e., B11-B14) in the user field (i.e., 21 bits) may include information related to the spatial configuration. Specifically, examples of the second bits (i.e., B11-B14) may be shown in Tables 3 and 4 below.

[0142] [Table 3]

[0143]

[0144] [Table 4]

[0145]

[0146] As shown in Table 3 and / or Table 4, the second bits (e.g., B11-B14) may include information related to the number of spatial streams allocated to multiple user STAs allocated based on the MU-MIMO scheme. Figure 9When three user STAs are allocated to 106-RU based on the MU-MIMO scheme, N_user is set to "3". Therefore, the values of N_STS[1], N_STS[2], and N_STS[3] can be determined as shown in Table 3. For example, when the value of the second bit (B11-B14) is "0011", it can be set to N_STS[1]=4, N_STS[2]=1, N_STS[3]=1. That is, in Figure 9 In the example of , four spatial streams may be allocated to user field 1, one spatial stream may be allocated to user field 1, and one spatial stream may be allocated to user field 3.

[0147] As shown in the examples of Table 3 and / or Table 4, the information regarding the number of spatial streams for a user STA (i.e., the second bits, B11-B14) can consist of 4 bits. Furthermore, the information regarding the number of spatial streams for a user STA (i.e., the second bits, B11-B14) can support up to eight spatial streams. Furthermore, the information regarding the number of spatial streams for a user STA (i.e., the second bits, B11-B14) can support up to four spatial streams for one user STA.

[0148] In addition, the third bit (ie, B15-18) in the user field (ie, 21 bits) may include modulation and coding scheme (MCS) information. The MCS information may be applied to the data field in the PPDU including the corresponding SIG-B.

[0149] MCS, MCS information, MCS index, MCS field, etc. used in this specification may be indicated by an index value. For example, MCS information may be indicated by indexes 0 to 11. MCS information may include information related to constellation modulation types (e.g., BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, etc.) and information related to coding rates (e.g., 1 / 2, 2 / 3, 3 / 4, 5 / 6e, etc.). Information related to channel coding types (e.g., LCC or LDPC) may not be included in the MCS information.

[0150] In addition, the fourth bit (ie, B19) in the user field (ie, 21 bits) may be a reserved field.

[0151] In addition, the fifth bit (i.e., B20) in the user field (i.e., 21 bits) may include information on the coding type (e.g., BCC or LDPC). That is, the fifth bit (i.e., B20) may include information on the type of channel coding (e.g., BCC or LDPC) applied to the data field in the PPDU including the corresponding SIG-B.

[0152] The above example relates to a user field in the first format (a format for the MU-MIMO scheme). An example of a user field in the second format (a format for a non-MU-MIMO scheme) is as follows.

[0153] The first bit (e.g., B0-B10) in the user field of the second format may include identification information of the user STA. In addition, the second bit (e.g., B11-B13) in the user field of the second format may include information related to the number of spatial streams applied to the corresponding RU. In addition, the third bit (e.g., B14) in the user field of the second format may include information related to whether a beamforming steering matrix is applied. The fourth bit (e.g., B15-B18) in the user field of the second format may include modulation and coding scheme (MCS) information. In addition, the fifth bit (e.g., B19) in the user field of the second format may include information related to whether dual carrier modulation (DCM) is applied. In addition, the sixth bit (i.e., B20) in the user field of the second format may include information related to the coding type (e.g., BCC or LDPC).

[0154] Figure 10 UL-MU-based operations are shown. As shown, a transmitting STA (e.g., an AP) may perform channel access through contention (e.g., a backoff operation) and may transmit a trigger frame 1030. That is, the transmitting STA may transmit a PPDU including the trigger frame 1030. Upon receiving the PPDU including the trigger frame, a trigger-based (TB) PPDU is transmitted after a delay corresponding to SIFS.

[0155] The TB PPDUs 1041 and 1042 may be transmitted at the same time period and may be transmitted from a plurality of STAs (eg, user STAs) having the AID indicated in the trigger frame 1030. The ACK frame 1050 for the TB PPDU may be implemented in various forms.

[0156] refer to Figures 11 to 13 Describes the specific characteristics of the trigger frame. Even when using UL-MU communication, either the Orthogonal Frequency Division Multiple Access (OFDMA) scheme or the MU-MIMO scheme may be used, and both OFDMA and MU-MIMO schemes may be used simultaneously.

[0157] Figure 11 An example of a trigger frame is shown. Figure 11 The trigger frame allocates resources for uplink multi-user (MU) transmission and may be sent, for example, from an AP. The trigger frame may be configured by a MAC frame and may be included in a PPDU.

[0158] Figure 11The various fields shown may be partially omitted, and another field may be added. In addition, the length of each field may be changed to be different from that shown in the figure.

[0159] Figure 11 The frame control field 1110 may include information related to the MAC protocol version and additional control information. The duration field 1120 may include time information configured by the NAV or information related to an identifier (eg, AID) of the STA.

[0160] In addition, the RA field 1130 may include the address information of the receiving STA of the corresponding trigger frame and may optionally be omitted. The TA field 1140 may include the address information of the STA (e.g., AP) that sends the corresponding trigger frame. The public information field 1150 includes public control information applied to the receiving STA that receives the corresponding trigger frame. For example, it may include a field indicating the length of the L-SIG field of the uplink PPDU sent in response to the corresponding trigger frame or information for controlling the content of the SIG-A field (i.e., HE-SIG-A field) of the uplink PPDU sent in response to the corresponding trigger frame. In addition, as public control information, information related to the length of the CP of the uplink PPDU sent in response to the corresponding trigger frame or information related to the length of the LTF field may be included.

[0161] In addition, it is preferred to include Figure 11 The number of STAs receiving the trigger frame corresponds to the per-user information fields 1160 # 1 to 1160 # N. The per-user information field may also be referred to as an “allocation field”.

[0162] in addition, Figure 11 The trigger frame may include a padding field 1170 and a frame check sequence field 1180.

[0163] Figure 11 Each of the illustrated per-user information fields 1160#1 through 1160#N may include a plurality of subfields.

[0164] Figure 12 An example of the common information field of a trigger frame is shown. Figure 12 The subfields of the FIFO may be partially omitted, and additional subfields may be added. In addition, the length of each subfield shown may be changed.

[0165] The length field 1210 shown has the same value as the length field of the L-SIG field of the uplink PPDU transmitted in response to the corresponding trigger frame, and the length field of the L-SIG field of the uplink PPDU indicates the length of the uplink PPDU. As a result, the length field 1210 of the trigger frame can be used to indicate the length of the corresponding uplink PPDU.

[0166] In addition, the tandem identifier field 1220 indicates whether tandem operation is performed. Tandem operation means that downlink MU transmission and uplink MU transmission are performed together in the same TXOP. In other words, it means that downlink MU transmission is performed, and then uplink MU transmission is performed after a preset time (e.g., SIFS). During tandem operation, only one transmitting device (e.g., an AP) can perform downlink communication, and multiple transmitting devices (e.g., non-APs) can perform uplink communication.

[0167] The CS request field 1230 indicates whether a wireless medium status or NAV, etc. must be considered in case that a reception device that has received a corresponding trigger frame transmits a corresponding uplink PPDU.

[0168] The HE-SIG-A information field 1240 may include information for controlling the content of the SIG-A field (ie, HE-SIG-A field) of the uplink PPDU in response to the corresponding trigger frame.

[0169] The CP and LTF type field 1250 may include information about the CP length and LTF length of the uplink PPDU sent in response to the corresponding trigger frame. The trigger type field 1260 may indicate the purpose of using the corresponding trigger frame, such as a typical trigger, a beamforming trigger, a request for block ACK / NACK, etc.

[0170] It can be assumed that the trigger type field 1260 of the trigger frame in this specification indicates a basic type of trigger frame for typical triggering. For example, the basic type of trigger frame can be referred to as a basic trigger frame.

[0171] Figure 13 An example of subfields included in the per-user information field is illustrated. Figure 13 The user information field 1300 can be understood as the above reference Figure 11 Any of the mentioned per-user information fields 1160#1 to 1160#N. Included in Figure 13 The subfields in the user information field 1300 may be partially omitted, and additional subfields may be added. In addition, the lengths of the various subfields shown may be changed.

[0172] Figure 13 The user identifier field 1310 indicates an identifier of the STA (ie, the receiving STA) corresponding to the per-user information. An example of the identifier may be all or part of the association identifier (AID) value of the receiving STA.

[0173] In addition, the RU allocation field 1320 may be included. That is, when the receiving STA identified by the user identifier field 1310 transmits a TB PPDU in response to the trigger frame, the TB PPDU is transmitted through the RU indicated by the RU allocation field 1320. In this case, the RU indicated by the RU allocation field 1320 may be Figure 5 、 Figure 6 and Figure 7 RU shown.

[0174] Figure 13 The subfield of the TB PPDU may include a coding type field 1330. The coding type field 1330 may indicate the coding type of the TB PPDU. For example, when BCC coding is applied to the TB PPDU, the coding type field 1330 may be set to "1", and when LDPC coding is applied, the coding type field 1330 may be set to "0".

[0175] in addition, Figure 13 The subfields of the 1340 may include an MCS field 1340. The MCS field 1340 may indicate the MCS scheme applied to the TB PPDU. For example, when BCC coding is applied to the TB PPDU, the coding type field 1330 may be set to "1", and when LDPC coding is applied, the coding type field 1330 may be set to "0".

[0176] Hereinafter, a UL OFDMA-based random access (UORA) scheme will be described.

[0177] Figure 14 Describe the technical features of the UORA solution.

[0178] The sending STA (e.g., AP) can Figure 14 Specifically, the AP may allocate the first RU resource (AID 0, RU 1), the second RU resource (AID 0, RU 2), the third RU resource (AID 0, RU 3), the fourth RU resource (AID 2045, RU 4), the fifth RU resource (AID 2045, RU 5), and the sixth RU resource (AID 3, RU 6). Information related to AID 0, AID 3, or AID 2045 may be included in, for example, Figure 13 The information related to RU 1 to RU 6 may be included in the user identifier field 1310. Figure 13 RU allocation field 1320. AID=0 may mean UORA resources for associated STAs, and AID=2045 may mean UORA resources for non-associated STAs. Figure 14 The 1st to 3rd RU resources can be used as UORA resources for associated STAs. Figure 14 The 4th RU resource and the 5th RU resource can be used as UORA resources for non-associated STAs. Figure 14 The 6th RU resources may be used as typical resources for UL MU.

[0179] exist Figure 14 In the example, STA1's OFDMA random access backoff (OBO) is reduced to 0, and STA1 randomly selects the second RU resource (AID 0, RU 2). In addition, since STA2 / 3's OBO counter is greater than 0, no uplink resources are allocated to STA2 / 3. Figure 14 For STA4 in FIG, since the AID of STA4 (eg, AID=3) is included in the trigger frame, resources of RU 6 are allocated without backoff.

[0180] Specifically, due to Figure 14 STA1 is the associated STA, so the total number of eligible RA RUs for STA1 is 3 (RU1, RU2 and RU3), so STA1 decrements the OBO counter by 3 to make the OBO counter 0. In addition, since Figure 14 STA2 is the associated STA, so the total number of eligible RA RUs for STA2 is 3 (RU 1, RU 2 and RU 3), so STA2 decrements the OBO counter by 3, but the OBO counter is greater than 0. In addition, since Figure 14 STA3 is a non-associated STA, so the total number of eligible RA RUs for STA3 is 2 (RU 4, RU 5), so STA3 decrements the OBO counter by 2, but the OBO counter is greater than 0.

[0181] Figure 15 An example of channels used / supported / defined in the 2.4 GHz frequency band is shown.

[0182] The 2.4 GHz band may be referred to as other terms such as a first frequency band. Additionally, the 2.4 GHz band may refer to a frequency domain that uses / supports / defines channels with center frequencies close to 2.4 GHz (eg, channels with center frequencies within 2.4 to 2.5 GHz).

[0183] Multiple 20 MHz channels may be included in the 2.4 GHz frequency band. 20 MHz within 2.4 GHz may have multiple channel indices (e.g., index 1 to index 14). For example, the center frequency of a 20 MHz channel assigned with channel index 1 may be 2.412 GHz, the center frequency of a 20 MHz channel assigned with channel index 2 may be 2.417 GHz, and the center frequency of a 20 MHz channel assigned with channel index N may be (2.407+0.005*N) GHz. Channel indices may be referred to by various terms such as channel numbers. The specific values of channel indices and center frequencies may vary.

[0184] Figure 15 Four channels within the 2.4 GHz frequency band are illustrated. Each of the first frequency domain 1510 to the fourth frequency domain 1540 shown herein may include one channel. For example, the first frequency domain 1510 may include channel 1 (a 20 MHz channel with index 1). In this case, the center frequency of channel 1 may be set to 2412 MHz. The second frequency domain 1520 may include channel 6. In this case, the center frequency of channel 6 may be set to 2437 MHz. The third frequency domain 1530 may include channel 11. In this case, the center frequency of channel 11 may be set to 2462 MHz. The fourth frequency domain 1540 may include channel 14. In this case, the center frequency of channel 14 may be set to 2484 MHz.

[0185] Figure 16 An example of channels used / supported / defined in the 5 GHz frequency band is shown.

[0186] The 5 GHz frequency band may be referred to by other terms such as a second frequency band. The 5 GHz frequency band may refer to a frequency domain that uses / supports / defines channels with a center frequency greater than or equal to 5 GHz and less than 6 GHz (or less than 5.9 GHz). Alternatively, the 5 GHz frequency band may include multiple channels between 4.5 GHz and 5.5 GHz. Figure 16 The specific values shown may vary.

[0187] Multiple channels within the 5 GHz band include Unlicensed National Information Infrastructure (UNII)-1, UNII-2, UNII-3, and ISM. UNII-1 can be referred to as UNII Low. UNII-2 can include frequency domains called UNII Mid and UNII-2 Extended. UNII-3 can be referred to as UNII Upper.

[0188] Multiple channels can be configured within the 5 GHz frequency band, and the bandwidth of each channel can be set to various values, such as 20 MHz, 40 MHz, 80 MHz, or 160 MHz. For example, the 5170 MHz to 5330 MHz frequency domain / range within UNII-1 and UNII-2 can be divided into eight 20 MHz channels. The 5170 MHz to 5330 MHz frequency domain / range can be divided into four channels using a 40 MHz frequency domain. The 5170 MHz to 5330 MHz frequency domain / range can be divided into two channels using an 80 MHz frequency domain. Alternatively, the 5170 MHz to 5330 MHz frequency domain / range can be divided into one channel using a 160 MHz frequency domain.

[0189] Figure 17 An example of channels used / supported / defined in the 6 GHz frequency band is shown.

[0190] The 6 GHz frequency band may be referred to by other terms such as a third frequency band, etc. The 6 GHz frequency band may mean a frequency domain that uses / supports / defines channels having a center frequency greater than or equal to 5.9 GHz. Figure 17 The specific values shown may be changed.

[0191] For example, Figure 17 The 20MHz channel can be defined starting from 5.940GHz. Figure 17 Among the 20 MHz channels, the leftmost channel may have an index of 1 (or channel index, channel number, etc.), and 5.945 GHz may be assigned as the center frequency. That is, the center frequency of the channel of index N may be determined to be (5.940+0.005*N) GHz.

[0192] therefore, Figure 17 The indices (or channel numbers) of the 2 MHz channels can be 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61, 65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 129, 133, 137, 141, 145, 149, 153, 157, 161, 165, 169, 173, 177, 181, 185, 189, 193, 197, 201, 205, 209, 213, 217, 221, 225, 229, 233. In addition, according to the above (5.940+0.005*N)GHz rule, Figure 17The indices of the 40 MHz channels can be 3, 11, 19, 27, 35, 43, 51, 59, 67, 75, 83, 91, 99, 107, 115, 123, 131, 139, 147, 155, 163, 171, 179, 187, 195, 203, 211, 219, 227.

[0193] Despite Figure 17 20, 40, 80, and 160 MHz channels are illustrated in the example of FIG, but a 240 MHz channel or a 320 MHz channel may be additionally added.

[0194] Hereinafter, the PPDU transmitted / received in the STA of this specification will be described.

[0195] Figure 18 This figure shows an example of a PPDU used in this specification.

[0196] Figure 18 The PPDU of the present invention may be referred to by various terms such as EHT PPDU, TX PPDU, RX PPDU, first type or Nth type PPDU, etc. For example, in this specification, PPDU or EHT PPDU may be referred to by various terms such as TX PPDU, RX PPDU, first type or Nth type PPDU, etc. In addition, the EHT PPDU may be used in the EHT system and / or a new WLAN system enhanced from the EHT system.

[0197] Figure 18 The PPDU may indicate all or part of the PPDU type used in the EHT system. For example, Figure 18 The example of can be used for both single user (SU) mode and multi user (MU) mode. In other words, Figure 18 The PPDU may be for one receiving STA or multiple receiving STAs. Figure 18 When the PPDU is used in trigger-based (TB) mode, it can be omitted Figure 18 In other words, a STA that has received a trigger frame for uplink MU (UL-MU) may send an EHT-SIG in Figure 18 In the example, the PPDU of EHT-SIG is omitted.

[0198] exist Figure 18 In the physical layer, L-STF to EHT-LTF may be referred to as a preamble or a physical preamble and may be generated / sent / received / obtained / decoded in the physical layer.

[0199] You can Figure 18The subcarrier spacing of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields is determined to be 312.5 kHz, and the subcarrier spacing of the EHT-STF, EHT-LTF, and data fields can be determined to be 78.125 kHz. That is, the tone index (or subcarrier index) of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields can be expressed in units of 312.5 kHz, and the tone index (or subcarrier index) of the EHT-STF, EHT-LTF, and data fields can be expressed in units of 78.125 kHz.

[0200] exist Figure 18 In the PPDU of the IEEE 802.11a PPDU, the L-LTF and L-STF can be the same as those in the regular fields.

[0201] Figure 18 The L-SIG field may include, for example, 24 bits of information. For example, the 24 bits of information may include a 4-bit rate field, a 1-bit reserved bit, a 12-bit length field, a 1-bit parity bit, and 6-bit tail bits. For example, the 12-bit length field may include information related to the length or duration of the PPDU. For example, the 12-bit length field may be determined based on the PPDU type. For example, when the PPDU is a non-HT, HT, VHT PPDU, or EHT PPDU, the length field value may be determined as a multiple of 3. For example, when the PPDU is an HE PPDU, the length field value may be determined as "a multiple of 3" + 1 or "a multiple of 3" + 2. In other words, for a non-HT, HT, VHT PPDU, or EHT PPDU, the length field value may be determined as a multiple of 3, and for an HE PPDU, the length field value may be determined as "a multiple of 3" + 1 or "a multiple of 3" + 2.

[0202] For example, the transmitting STA may apply BCC encoding based on a coding rate of 1 / 2 to the 24-bit information of the L-SIG field. Thereafter, the transmitting STA may obtain 48 bits of BCC coded bits. BPSK modulation may be applied to the 48-bit coded bits, thereby generating 48 BPSK symbols. The transmitting STA may map the 48 BPSK symbols to locations other than the pilot subcarriers {subcarrier indices -21, -7, +7, +21} and the DC subcarrier {subcarrier index 0}. As a result, the 48 BPSK symbols may be mapped to subcarrier indices -26 to -22, -20 to -8, -6 to -1, +1 to +6, +8 to +20, and +22 to +26. The transmitting STA may additionally map the signal {-1, -1, -1, 1} to subcarrier indices {-28, -27, +27, +28}. The aforementioned signal may be used for channel estimation in the frequency domain corresponding to {-28, -27, +27, +28}.

[0203] The transmitting STA can generate the RL-SIG in the same manner as the L-SIG. BPSK modulation can be applied to the RL-SIG. Based on the presence of the RL-SIG, the receiving STA can know whether the RX PPDU is a HE PPDU or an EHT PPDU.

[0204] Universal SIG (U-SIG) can be inserted in Figure 18 The U-SIG can be referred to by various terms such as first SIG field, first SIG, first type SIG, control signal, control signal field, first (type) control signal, etc.

[0205] The U-SIG may include N bits of information and may include information for identifying the type of the EHT PPDU. For example, the U-SIG may be configured based on two symbols (e.g., two consecutive OFDM symbols). Each symbol used for the U-SIG (e.g., OFDM symbol) may have a duration of 4 μs. Each symbol of the U-SIG may be used to transmit 26 bits of information. For example, each symbol of the U-SIG may be transmitted / received based on 52 data tones and 4 pilot tones.

[0206] Through the U-SIG (or U-SIG field), for example, A-bit information (e.g., 52 uncoded bits) can be transmitted. The first symbol of the U-SIG can transmit the first X bits of information of the A-bit information (e.g., 26 uncoded bits), and the second symbol of the U-SIG can transmit the remaining Y bits of information of the A-bit information (e.g., 26 uncoded bits). For example, the transmitting STA can obtain the 26 uncoded bits included in each U-SIG symbol. The transmitting STA can perform convolutional encoding (i.e., BCC encoding) based on a rate of R=1 / 2 to generate 52 coded bits, and can 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 allocated to each U-SIG symbol. Except for DC index 0, one U-SIG symbol can be transmitted based on 65 tones (subcarriers) from subcarrier index -28 to subcarrier index +28. The 52 BPSK symbols generated by the transmitting STA may be transmitted based on the remaining tones (subcarriers) excluding the pilot tones, ie, tones -21, -7, +7, +21.

[0207] For example, the A-bit information (e.g., 52 uncoded bits) generated by the U-SIG may include a CRC field (e.g., a field with a length of 4 bits) and a tail field (e.g., a field with a length of 6 bits). The CRC field and the tail field may be transmitted through the second symbol of the U-SIG. The CRC field may be generated based on the 26 bits allocated to the first symbol of the U-SIG and the remaining 16 bits in the second symbol excluding the CRC / tail field, and may be generated based on a conventional CRC calculation algorithm. In addition, the tail field may be used to terminate the trellis of the convolutional decoder and may be set to, for example, "000000".

[0208] The A-bit information (e.g., 52 uncoded bits) transmitted by the U-SIG (or U-SIG field) can be divided into version-independent bits and version-dependent bits. For example, the version-independent bits can have a fixed or variable size. For example, the version-independent bits can be assigned only to the first symbol of the U-SIG, or the version-independent bits can be assigned to both the first and second symbols of the U-SIG. For example, the version-independent bits and the version-dependent bits can be referred to by various terms such as first control bits, second control bits, etc.

[0209] For example, the version-independent bits of the U-SIG may include a 3-bit PHY version identifier. For example, the 3-bit PHY version identifier may include information related to the PHY version of the TX / RX PPDU. For example, a first value of the 3-bit PHY version identifier may indicate that the TX / RX PPDU is an EHT PPDU. In other words, when a transmitting STA transmits an EHT PPDU, the 3-bit PHY version identifier may be set to the first value. In other words, a receiving STA may determine that the RX PPDU is an EHT PPDU based on the PHY version identifier having the first value.

[0210] For example, the version-independent bits of the U-SIG may include a 1-bit UL / DL Flag field, wherein a first value of the 1-bit UL / DL Flag field is associated with UL communication, and a second value of the UL / DL Flag field is associated with DL communication.

[0211] For example, the version-independent bits of the U-SIG may include information related to the TXOP length and information related to the BSS color ID.

[0212] For example, when the EHT PPDU is divided into various types (for example, various types such as EHT PPDU related to SU mode, EHT PPDU related to MU mode, EHT PPDU related to TB mode, EHT PPDU related to extended range transmission, etc.), information related to the type of the EHT PPDU may be included in the version-related bit of the U-SIG.

[0213] For example, the U-SIG may include: 1) a bandwidth field including information related to the bandwidth; 2) a field including information related to the MCS scheme applied to the EHT-SIG; 3) an indication field including information related to whether the dual subcarrier modulation (DCM) scheme is applied to the EHT-SIG; 4) a field including information related to the number of symbols used for the EHT-SIG; 5) a field including information related to whether the EHT-SIG is generated across the entire frequency band; 6) a field including information related to the type of the EHT-LTF / STF; and 7) information related to a field indicating the EHT-LTF length and the CP length.

[0214] Can Figure 18 Preamble puncturing is applied to the PPDU. Preamble puncturing means that puncturing is applied to a portion of the full frequency band (e.g., the secondary 20 MHz frequency band). For example, when transmitting an 80 MHz PPDU, the STA may apply puncturing to the secondary 20 MHz frequency band within the 80 MHz frequency band and may transmit the PPDU only on the primary 20 MHz frequency band and the secondary 40 MHz frequency band.

[0215] For example, the pattern of the preamble puncture can be preconfigured. For example, when the first puncture pattern is applied, puncture can be applied only to the auxiliary 20 MHz band within the 80 MHz band. For example, when the second puncture pattern is applied, puncture can be applied only to any one of the two auxiliary 20 MHz bands in the auxiliary 40 MHz band included in the 80 MHz band. For example, when the third puncture pattern is applied, puncture can be applied only to the auxiliary 20 MHz band in the main 80 MHz band included in the 160 MHz band (or 80+80 MHz band). For example, when the fourth puncture pattern is applied, puncture can be applied to at least one 20 MHz channel that does not belong to the main 40 MHz band in the 80 MHz band included in the 160 MHz band (or 80+80 MHz band) when the main 40 MHz band exists.

[0216] Information related to preamble puncturing applied to the PPDU may be included in the U-SIG and / or EHT-SIG. For example, the first field of the U-SIG may include information related to the contiguous bandwidth, and the second field of the U-SIG may include information related to the preamble puncturing applied to the PPDU.

[0217] For example, based on the following method, the U-SIG and the EHT-SIG may include information related to the preamble puncture. When the bandwidth of the PPDU exceeds 80 MHz, the U-SIG can be configured separately in units of 80 MHz. For example, when the bandwidth of the PPDU is 160 MHz, the PPDU may include a first U-SIG for a first 80 MHz band and a second U-SIG for a second 80 MHz band. In this case, the first field of the first U-SIG may include information related to the 160 MHz bandwidth, and the second field of the first U-SIG may include information related to the preamble puncture applied to the first 80 MHz band (i.e., information related to the preamble puncture pattern). In addition, the first field of the second U-SIG may include information related to the 160 MHz bandwidth, and the second field of the second U-SIG may include information related to the preamble puncture applied to the second 80 MHz band (i.e., information related to the preamble puncture pattern). At the same time, the EHT-SIG continuous with the first U-SIG may include information related to the preamble puncturing applied to the second 80 MHz band (i.e., information related to the preamble puncturing pattern), and the EHT-SIG continuous with the second U-SIG may include information related to the preamble puncturing applied to the first 80 MHz band (i.e., information related to the preamble puncturing pattern).

[0218] Additionally or alternatively, the U-SIG and EHT-SIG may include information related to preamble puncturing based on the following method. The U-SIG may include information related to preamble puncturing for all frequency bands (i.e., information related to the preamble puncturing pattern). That is, the EHT-SIG may not include information related to preamble puncturing, and only the U-SIG may include information related to preamble puncturing (i.e., information related to the preamble puncturing pattern).

[0219] The U-SIG can be configured in 20MHz units. For example, when an 80MHz PPDU is configured, the U-SIG can be duplicated. That is, four identical U-SIGs can be included in an 80MHz PPDU. PPDUs with bandwidth exceeding 80MHz can include different U-SIGs.

[0220] The U-SIG can be configured in 20MHz units. For example, when an 80MHz PPDU is configured, the U-SIG can be duplicated. That is, four identical U-SIGs can be included in an 80MHz PPDU. PPDUs with bandwidth exceeding 80MHz can include different U-SIGs.

[0221] Figure 18 The EHT-SIG in the U-SIG may include control information for receiving STAs. The EHT-SIG may be transmitted through at least one symbol, and one symbol may have a length of 4 μs. Information related to the number of symbols used for the EHT-SIG may be included in the U-SIG.

[0222] EHT-SIG may include reference Figure 8 and Figure 9 For example, the EHT-SIG may include the following: Figure 8 The common field and the user-specific field in the example of . The common field of EHT-SIG can be omitted, and the number of user-specific fields can be determined based on the number of users.

[0223] As in Figure 8 In the example of , the common field of EHT-SIG and the user-specific field of EHT-SIG can be encoded separately. One user block field included in the user-specific field can include information for two users, but the last user block field included in the user-specific field can include information for one user. That is, one user block field of EHT-SIG can include up to two user fields. Figure 9 In the example of , each user field may be associated with a MU-MIMO allocation or may be associated with a non-MU-MIMO allocation.

[0224] As in Figure 8 In the example of , the common field of the EHT-SIG may include a CRC bit and a tail bit. The length of the CRC bit may be determined to be 4 bits. The length of the tail bit may be determined to be 6 bits and may be set to "000000".

[0225] As in Figure 8 In the example of , the common field of EHT-SIG may include RU allocation information. RU allocation information may mean information related to the positions of RUs to which multiple users (i.e., multiple receiving STAs) are allocated. RU allocation information may be configured in units of 8 bits (or N bits), as shown in Table 1.

[0226] The examples in Tables 5 to 7 are examples of 8-bit (or N-bit) information for various RU allocations. The index shown in each table may be modified, some entries in Tables 5 to 7 may be omitted, and entries may be added (not shown).

[0227] The examples of Tables 5 to 7 relate to information related to the location of RUs allocated to the 20 MHz band. For example, "index 0" of Table 5 may be in the case of individually allocating nine 26-RUs (e.g., Figure 5 Nine 26-RU cases shown in the figure were used.

[0228] In addition, multiple RUs can be allocated to one STA in the EHT system. For example, with respect to "Index 60" in Table 6, one 26-RU can be allocated to the leftmost user (i.e., receiving STA) of the 20 MHz band, one 26-RU and one 52-RU can be allocated to the right, and five 26-RUs can be allocated to the right.

[0229] [Table 5]

[0230]

[0231] [Table 6]

[0232]

[0233] [Table 7]

[0234]

[0235] A mode in which the common fields of the EHT-SIG are omitted may be supported. The mode in which the common fields of the EHT-SIG are omitted may be referred to as compressed mode. When compressed mode is used, multiple users (i.e., multiple receiving STAs) may decode the PPDU (e.g., the data field of the PPDU) based on non-OFDMA. That is, multiple users of the EHT PPDU may decode the PPDU (e.g., the data field of the PPDU) received via the same frequency band. In addition, when non-compressed mode is used, multiple users of the EHT PPDU may decode the PPDU (e.g., the data field of the PPDU) based on OFDMA. That is, multiple users of the EHT PPDU may receive the PPDU (e.g., the data field of the PPDU) via different frequency bands.

[0236] The EHT-SIG can be configured based on various MCS schemes. As described above, information related to the MCS scheme applied to the EHT-SIG can be included in the U-SIG. The EHT-SIG can be configured based on the DCM scheme. For example, among the N data tones (e.g., 52 data tones) allocated for the EHT-SIG, a first modulation scheme can be applied to half of the continuous tones, and a second modulation scheme can be applied to the remaining half of the continuous tones. That is, the transmitting STA can use the first modulation scheme to modulate specific control information using the first symbol and allocate it to half of the continuous tones, and can use the second modulation scheme to modulate the same control information using the second symbol and allocate it to the remaining half of the continuous tones. As described above, information (e.g., a 1-bit field) about whether the DCM scheme is applied to the EHT-SIG can be included in the U-SIG. Figure 18 The HE-STF can be used to improve automatic gain control estimation in a multiple-input multiple-output (MIMO) environment or an OFDMA environment. Figure 18 The HE-LTF can be used to estimate the channel in a MIMO environment or an OFDMA environment.

[0237] Can be set according to various types Figure 18EHT-STF. For example, a first type of STF (e.g., 1x STF) can be generated based on a first type of STF sequence in which non-zero coefficients are arranged at intervals of 16 subcarriers. The STF signal generated based on the first type of STF sequence can have a period of 0.8 μs, and the periodic signal of 0.8 μs can be repeated 5 times to become a first type of STF with a length of 4 μs. For example, a second type of STF (e.g., 2x STF) can be generated based on a second type of STF sequence in which non-zero coefficients are arranged at intervals of 8 subcarriers. The STF signal generated based on the second type of STF sequence can have a period of 1.6 μs, and the periodic signal of 1.6 μs can be repeated 5 times to become a second type of STF with a length of 8 μs. Hereinafter, an example of a sequence for configuring EHT-STF (i.e., an EHT-STF sequence) is proposed. The following sequence can be modified in various ways.

[0238] The EHT-STF may be configured based on the following sequence M.

[0239] <Formula 1>

[0240] M={–1,–1,–1,1,1,1,–1,1,1,1,–1,1,1,–1,1}

[0241] The EHT-STF for 20MHz PPDU can be configured based on the following formula. The following example may be a first type (i.e., 1x STF) sequence. For example, the first type sequence may be included in an EHT-PPDU that is not a triggered (TB) PPDU. In the following formula, (a:b:c) may mean the duration of b tone intervals (i.e., subcarrier intervals) defined as from tone index (i.e., subcarrier index) 'a' to tone index 'c'. For example, the following formula 2 may represent a sequence of 16 tone intervals defined as from tone index -112 to tone index 112. Since a subcarrier spacing of 78.125kHz is applied to EHT-STR, 16 tone intervals may mean that the EHT-STF coefficients (or elements) are arranged at intervals of 78.125*16=1250kHz. In addition, * means multiplication, and sqrt() means square root. In addition, j means an imaginary number.

[0242] <Formula 2>

[0243] EHT-STF(-112:16:112)={M}*(1+j) / sqrt(2)

[0244] EHT-STF(0)=0

[0245] The EHT-STF for a 40 MHz PPDU may be configured based on the following formula: The following example may be a first type (ie, 1xSTF) sequence.

[0246] <Formula 3>

[0247] EHT-STF(-240:16:240)={M,0,-M}*(1+j) / sqrt(2)

[0248] The EHT-STF for 80 MHz PPDU may be configured based on the following formula: The following example may be a first type (ie, 1xSTF) sequence.

[0249] <Formula 4>

[0250] EHT-STF(-496:16:496)={M,1,–M,0,–M,1,–M}*(1+j) / sqrt(2)

[0251] The EHT-STF for 160 MHz PPDU may be configured based on the following formula: The following example may be a first type (ie, 1xSTF) sequence.

[0252] <Formula 5>

[0253] EHT-STF(-1008:16:1008)={M,1,–M,0,–M,1,–M,0,–M,–1,M,0,–M,1,–M}*(1+j) / sqrt(2)

[0254] In the EHT-STF for 80+80 MHz PPDU, the sequence for the lower 80 MHz may be the same as Equation 4. In the EHT-STF for 80+80 MHz PPDU, the sequence for the upper 80 MHz may be configured based on the following equation.

[0255] <Formula 6>

[0256] EHT-STF(-496:16:496)={-M,-1,M,0,–M,1,–M}*(1+j) / sqrt(2)

[0257] The following Equations 7 to 11 are related to an example of the second type (ie, 2x STF) sequence.

[0258] <Formula 7>

[0259] EHT-STF(-120:8:120)={M,0,-M}*(1+j) / sqrt(2)

[0260] The EHT-STF for 40 MHz PPDU may be configured based on the following formula.

[0261] <Formula 8>

[0262] EHT-STF(-248:8:248)={M,–1,–M,0,M,–1,M}*(1+j) / sqrt(2)

[0263] EHT-STF(-248)=0

[0264] EHT-STF(248)=0

[0265] The EHT-STF for 80 MHz PPDU may be configured based on the following formula.

[0266] <Formula 9>

[0267] EHT-STF(-504:8:504)={M,–1,M,–1,–M,–1,M,0,–M,1,M,1,–M,1,–M}*(1+j) / sqrt(2)

[0268] The EHT-STF for 160 MHz PPDU may be configured based on the following formula.

[0269] <Formula 10>

[0270] EHT-STF(-1016:16:1016)={M,–1,M,–1,–M,–1,M,0,–M,1,M,1,–M,1,–M,0,–M,1,–M,1,M,1,–M,0,–M,1,M,1,–M,1,–M}*(1+j) / sqrt(2)

[0271] EHT-STF(-8)=0,EHT-STF(8)=0,

[0272] EHT-STF(-1016)=0,EHT-STF(1016)=0

[0273] In the EHT-STF for 80+80 MHz PPDU, the sequence for the lower 80 MHz may be the same as Equation 9. In the EHT-STF for 80+80 MHz PPDU, the sequence for the upper 80 MHz may be configured based on the following equation.

[0274] <Formula 11>

[0275] EHT-STF(-504:8:504)={–M,1,–M,1,M,1,–M,0,–M,1,M,1,–M,1,–M}*(1+j) / sqrt(2)

[0276] EHT-STF(-504)=0,

[0277] EHT-STF(504)=0

[0278] EHT-LTF can have first, second, and third types (i.e., 1x, 2x, 4x LTF). For example, the first / second / third type LTF can be generated based on an LTF sequence in which non-zero coefficients are arranged at intervals of 4 / 2 / 1 subcarriers. The first / second / third type LTF can have a time length of 3.2 / 6.4 / 12.8 μs. In addition, GIs of various lengths (e.g., 0.8 / 1 / 6 / 3.2 μs) can be applied to the first / second / third type LTF.

[0279] Information related to the type of STF and / or LTF (including information related to the GI applied to the LTF) may be included in Figure 18 SIG-A field and / or SIG-B field, etc.

[0280] Can be based on Figure 5 and Figure 6 Example to configure Figure 18 PPDU (e.g., EHT-PPDU).

[0281] For example, based on Figure 5 The RU of the UE is configured to send an EHT PPDU on the 20MHz band, i.e., a 20MHz EHT PPDU. Figure 5 The positions of RUs that determine the EHT-STF, EHT-LTF, and data fields included in the EHT PPDU are shown in FIG.

[0282] Can be based on Figure 6 The RU of the 40MHz band is configured to send an EHT PPDU, i.e., a 40MHz EHT PPDU. Figure 6 The positions of RUs that determine the EHT-STF, EHT-LTF, and data fields included in the EHT PPDU are shown in FIG.

[0283] because Figure 6 The RU position corresponds to 40MHz, so it can be Figure 6 The tone plan for 80MHz is determined when the pattern of Figure 7 RU but Figure 6 The RU repeats the new tone twice to plan sending the 80MHz EHT PPDU.

[0284] when Figure 6When the pattern is repeated twice, 23 tones (i.e., 11 guard tones + 12 guard tones) can be configured in the DC region. That is, the tone plan for an 80 MHz EHT PPDU allocated based on OFDMA can have 23 DC tones. In contrast, an 80 MHz EHT PPDU allocated based on non-OFDMA (i.e., a non-OFDMA full-bandwidth 80 MHz PPDU) can be configured based on a 996-RU and can include 5 DC tones, 12 left guard tones, and 11 right guard tones.

[0285] Can Figure 6 The pattern is repeated several times in such a way that the tone plans for 160 / 240 / 320MHz are configured.

[0286] The following method can be used to Figure 18 The PPDU is determined (or identified) as an EHT PPDU.

[0287] The receiving STA may determine the type of the RX PPDU as an EHT PPDU based on the following aspects. For example, 1) when the first symbol after the L-LTF signal of the RX PPDU is a BPSK symbol; 2) when an RL-SIG in which the L-SIG of the RX PPDU is repeated is detected; and 3) when it is detected that the result of applying "modulo 3" to the value of the length field of the L-SIG of the RX PPDU is "0", the RX PPDU may be determined to be an EHT PPDU. When the RX PPDU is determined to be an EHT PPDU, the receiving STA may determine the type of the RX PPDU as an EHT PPDU based on Figure 18 The type of the EHT PPDU (e.g., SU / MU / triggered-based / extended range type) can be detected based on the bit information included in the symbol following the RL-SIG of the RX PPDU. In other words, the receiving STA can determine that the RX PPDU is an EHT PPDU based on the following: 1) the first symbol after the L-LTF signal, which is a BPSK symbol; 2) the RL-SIG that is consecutive to and identical to the L-SIG field; 3) the L-SIG including the length field, in which the result of applying "modulo 3" is set to "0"; and 4) the 3-bit PHY version identifier of the aforementioned U-SIG (e.g., a PHY version identifier having a first value).

[0288] For example, the receiving STA may determine the type of the RX PPDU as an EHT PPDU based on the following: 1) when the first symbol after the L-LTF signal is a BPSK symbol; 2) when an RL-SIG in which the L-SIG is repeated is detected; and 3) when the result of applying "modulo 3" to the value of the length field of the L-SIG is detected to be "1" or "2", the RX PPDU may be determined as a HEPPDU.

[0289] For example, the receiving STA may determine the type of the RX PPDU as non-HT, HT, or VHT PPDU based on the following factors. For example, 1) when the first symbol after the L-LTF signal is a BPSK symbol; and 2) when the RL-SIG in which the L-SIG is repeated is not detected, the RX PPDU may be determined as non-HT, HT, or VHT PPDU. Furthermore, even if the receiving STA detects repeated RL-SIGs, if the result of applying "modulo 3" to the length value of the L-SIG is "0," the RX PPDU may be determined as non-HT, HT, or VHT PPDU.

[0290] In the following examples, signals represented as (TX / RX / UL / DL) signals, (TX / RX / UL / DL) frames, (TX / RX / UL / DL) packets, (TX / RX / UL / DL) data units, (TX / RX / UL / DL) data, etc. may be based on Figure 18 PPDU transmission / reception signal. Figure 18 The PPDU can be used to send / receive various types of frames. For example, Figure 18 The PPDU can be used for control frames. Examples of control frames may include Request to Send (RTS), Clear to Send (CTS), Power Save Poll (PS-poll), BlockACKReq, BlockAck, Null Data Packet (NDP) notifications, and trigger frames. For example, Figure 18 The PPDU can be used for management frames. Examples of management frames may include beacon frames, (re)association request frames, (re)association response frames, probe request frames, and probe response frames. For example, Figure 18 The PPDU can be used for data frames. For example, Figure 18 The PPDU may be used to simultaneously transmit at least two or more of a control frame, a management frame, and a data frame.

[0291] Figure 19 An example of a modified transmitting device and / or receiving device of the present specification is illustrated.

[0292] Figure 1 Each device / STA of sub-graph (a) / (b) can be modified as follows Figure 19 shown. Figure 19 The transceiver 630 can be used with Figure 1 The transceivers 113 and 123 are the same. Figure 19 The transceiver 630 may include a receiver and a transmitter.

[0293] Figure 19 The processor 610 can be used with Figure 1 The processors 111 and 121 are the same. Alternatively, Figure 19The processor 610 can be used with Figure 1 The processing chips 114 and 124 are the same.

[0294] Figure 19 The memory 620 can be used with Figure 1 The memories 112 and 122 are the same. Alternatively, Figure 19 The memory 620 may be Figure 1 The memories 112 and 122 are different separate external memories.

[0295] refer to Figure 19 , power management module 611 manages power for processor 610 and / or transceiver 630. Battery 612 supplies power to power management module 611. Display 613 outputs results processed by processor 610. Keypad 614 receives input to be used by processor 610. Keypad 614 may be displayed on display 613. SIM card 615 may be an integrated circuit for securely storing an International Mobile Subscriber Identity (IMSI) and its associated keys, which are used to identify and authenticate users on mobile phone devices (e.g., mobile phones and computers).

[0296] refer to Figure 19 , the speaker 640 may output a result related to the sound processed by the processor 610. The microphone 641 may receive an input related to the sound to be used by the processor 610.

[0297] 1. Tone Planning in 802.11ax WLAN Systems

[0298] In this specification, a tone plan refers to the rules for determining the size and / or location of a resource unit (RU). Below, we will describe a tone plan for a PPDU based on the IEEE 802.11ax standard, namely, an HE PPDU. In other words, the following describes the RU size and RU location applied to the HE PPDU, as well as control information related to the RU applied to the HE PPDU.

[0299] In this specification, the control information related to the RU (or the control information related to the tone plan) may include the size and position of the RU, information about the user STA assigned to a specific RU, the frequency bandwidth for the PPDU including the RU, and / or control information about the modulation scheme applied to the specific RU. The control information related to the RU may be included in the SIG field. For example, in the IEEE 802.11ax standard, the control information related to the RU is included in the HE-SIG-B field. That is, in the process of generating the TX PPDU, the transmitting STA may allow the control information about the RU included in the PPDU to be included in the HE-SIG-B field. In addition, the receiving STA may receive the HE-SIG-B included in the RX PPDU and obtain the control information included in the HE-SIG-B, so that it is determined based on the HE-SIG-B whether there is an RU assigned to the receiving STA and decode the assigned RU.

[0300] In the IEEE 802.11ax standard, HE-STF, HE-LTF, and data fields can be configured in units of RUs. That is, when the first RU for the first receiving STA is configured, the STF / LTF / data fields for the first receiving STA can be sent / received via the first RU.

[0301] In the IEEE 802.11ax standard, a PPDU for one receiving STA (i.e., SU PPDU) and a PPDU for multiple receiving STAs (i.e., MU PPDU) are separately defined, and their respective tone plans are separately defined. Specific details will be described below.

[0302] The RU defined in 11ax may include multiple subcarriers. For example, when the RU includes N subcarriers, it can be expressed by N-tone RU or N RU. The position of a specific RU can be expressed by a subcarrier index. The subcarrier index can be defined in units of subcarrier frequency intervals. In the 11ax standard, the subcarrier frequency interval is 312.5kHz or 78.125kHz, and the subcarrier frequency interval of the RU is 78.125kHz. That is, the subcarrier index +1 of the RU may mean a position that is 78.125kHz more increased than the DC tone, and the subcarrier index -1 of the RU may mean a position that is 78.125kHz less than the DC tone. For example, when the position of a specific RU is expressed by [-121:-96], the RU may be located in the area from subcarrier index -121 to subcarrier index -96. As a result, the RU can include 26 subcarriers.

[0303] The N-tone RU may include preset pilot tones.

[0304] 2. Null subcarriers and pilot subcarriers

[0305] Subcarrier and resource allocation in the 802.11ax system will be described.

[0306] An OFDM symbol consists of subcarriers, and the number of subcarriers can play a role in the bandwidth of the PPDU. In the WLAN 802.11 system, data subcarriers for data transmission, pilot subcarriers for phase information and parameter tracking, and unused subcarriers not used for data transmission and pilot transmission are defined.

[0307] A HE MU PPDU using OFDMA transmission may be sent using a mixture of 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, 484-tone RUs, and 996-tone RUs.

[0308] Here, a 26-tone RU consists of 24 data subcarriers and 2 pilot subcarriers. A 52-tone RU consists of 48 data subcarriers and 4 pilot subcarriers. A 106-tone RU consists of 102 data subcarriers and 4 pilot subcarriers. A 242-tone RU consists of 234 data subcarriers and 8 pilot subcarriers. A 484-tone RU consists of 468 data subcarriers and 16 pilot subcarriers. A 996-tone RU consists of 980 data subcarriers and 16 pilot subcarriers.

[0309] 1) Empty subcarriers

[0310] like Figures 5 to 7 As shown in Figure 1, null subcarriers exist between the 26-tone RU, 52-tone RU, and 106-tone RU positions. Null subcarriers are located near DC or edge tones to protect against transmit center frequency leakage, receiver DC offset, and interference from adjacent RUs. Null subcarriers have zero energy. The null subcarrier indices are listed below.

[0311]

[0312] The null subcarrier positions in each 80 MHz frequency segment of the 80+80 MHz HE PPDU shall follow the positions of the 80 MHz HE PPDU.

[0313] 2) Pilot subcarrier

[0314] If pilot subcarriers are present in the HE-LTF field of a HE SU PPDU, HE MU PPDU, HE ER SU PPDU, or HE TB PPDU, the position of the pilot sequence in the HE-LTF field and the data field can be the same as that of the 4x HE-LTF. In 1x HE-LTF, the position of the pilot sequence in the HE-LTF is configured based on the pilot subcarriers of the data field multiplied by 4. If pilot subcarriers are present in 2x HE-LTF, the position of the pilot subcarriers shall be the same as that of the pilot in the 4x data symbol. All pilot subcarriers are located at the even-numbered indices listed below.

[0315]

[0316] At 160 MHz or 80+80 MHz, for the 80 MHz on both sides, the position of the pilot subcarrier should use the same 80 MHz position.

[0317] 3. HE Transmission Process and Phase Rotation

[0318] In the 802.11ax wireless local area network (WLAN) system, the transmission process (or sending process) in the physical layer (PHY) includes the process of HE single-user (SU) PPDU, the transmission process of HE extended range (ER) SU PPDU, the transmission process of HE multi-user (MU) PPDU, and the transmission process based on HE trigger (TB) PPDU. The FORMAT field of PHY-TXSTART.request(TXVECTOR) can be the same as HE_SU, HE_MU, HE_ER_SU, or HE_TB. The transmission process does not describe the operation of optional features such as dual carrier modulation (DCM). Among the various transmission processes, Figure 21 Only the PHY transmission process of the HE SU PPDU is shown.

[0319] Figure 20 An example of a PHY transmission procedure for a HE SU PPDU is shown.

[0320] To transmit data, the MAC generates a PHY-TXSTART.request primitive, which puts the PHY entity into the transmit state. Furthermore, the PHY is configured to operate at the appropriate frequency via station management via the PLME. Other transmission parameters, such as the HE-MCS, coding type, and transmit power, are configured via the PHY-SAP using the PHY-TXSTART.request(TXVECTOR) primitive. After sending a PPDU containing a transmission (or communication) trigger frame, the MAC sublayer may issue a PHY-TRIGGER.request along with a TRIGVECTOR parameter, which provides the information necessary to demodulate the HE TB PPDU response expected by the PHY entity.

[0321] The PHY indicates the status of the primary channel and the other channels via PHY-CCA.indication. The PHY shall start the transmission of the PPDU after receiving the PHY-TXSTART.request(TXVECTOR) primitive.

[0322] After the PHY preamble transmission begins, the PHY entity immediately initiates data scrambling and data encoding. The encoding method of the data field is based on the FEC_CODING, CH_BANDWIDTH, NUM_STS, STBC, MCS and NUM_USERS parameters of TXVECTOR.

[0323] The SERVICE field and PSDU are encoded in the transmitter (or transmitting device) block diagram and will be described later. Data should be exchanged between the MAC and PHY using the PHY-DATA.request (DATA) primitive issued by the MAC and the PHY-DATA.confirm primitive issued by the PHY. PHY padding bits are applied to the PSDU to set the number of bits of the coded PSDU to an integer multiple of the number of coded bits per OFDM symbol.

[0324] The MAC ends the transmission agilely (or quickly) via the PHY-TXEND.request primitive. A PSDU transmission ends upon receipt of the PHY-TXEND.request primitive. Each PHY-TXEND.request primitive may be accompanied by a PHY-TXEND.confirm primitive from the PHY to notify its receipt.

[0325] Packet extension and / or signal extension may be present in a PPDU. A PHY-TXEND.confirm primitive is generated at the actual end time of the most recent PPDU, the end time of the packet extension, and the end time of the signal extension.

[0326] In the PHY, a guard interval (GI), indicated together with the GI duration in the GI_TYPE parameter of the TXVECTOR, is inserted into all data OFDM symbols as a solution to delay spread.

[0327] If the PPDU transmission is completed, the PHY entity enters the receiving state.

[0328] Figure 21 An example of a block diagram of a transmitting device for generating each field of an HE PPDU is shown.

[0329] To generate each field of the HE PPDU, the following block diagram is used.

[0330] a) Pre-FEC PHY padding

[0331] b) Scrambler

[0332] c) FEC (BCC or LDPC) encoder

[0333] d) Post-FEC PHY padding

[0334] e) Stream Parser

[0335] f) Segment parser (for continuous 160MHz and non-continuous 80+80MHz transmission)

[0336] g) BCC interleaver

[0337] h) Constellation Mapper

[0338] i) DCM Tone Mapper

[0339] j) Pilot insertion

[0340] k) Replication on multiple 20MHz (for BW>20MHz)

[0341] l) Multiply by the first column of PHE-LTF

[0342] m) LDPC Tone Mapper

[0343] n) Segment Parser

[0344] o) Space-Time Block Code (STBC) encoder for one spatial stream

[0345] p) Cyclic Shift Diversity (CSD) inserted per STS

[0346] q) Spatial Mapper

[0347] r) Frequency Mapping

[0348] s) Inverse Discrete Fourier Transform (IDFT)

[0349] f) Cyclic shift diversity (CSD) of each chain insertion

[0350] u) Guard Interval (GI) Insertion

[0351] v) Windowing

[0352] Figure 21 A block diagram (or transmitter block diagram) of a transmitting device for generating a data field of a HE single-user (SU) PPDU to which LDPC coding is applied and transmitted at 160 MHz is shown. If the transmitter block diagram is used to generate a data field of a HE SU PPDU transmitted in the 80+80 MHz frequency band, a segment parser is not used, such as Figure 21 That is, in the case where a segment parser is used to divide a frequency band into an 80 MHz frequency band and another 80 MHz frequency band, a block diagram of a transmitter (or transmitting device) is used per 80 MHz frequency band.

[0353] refer to Figure 21 , the LDPC encoder can encode the data field (or data bit stream). The data bit stream input to the LDPC encoder can be scrambled by the scrambler.

[0354] The stream parser divides the data bit stream encoded by the LDPC encoder into multiple spatial streams. At this time, the encoded data bit stream divided into each spatial stream can be called a spatial block. The number of spatial blocks can be determined by the number of spatial streams used to transmit the PPDU and can be set to be equal to the number of spatial streams.

[0355] The stream parser divides each spatial block into at least one or more data segments. Figure 21 As shown in , when the data field is transmitted in the 160 MHz band, the 160 MHz band is divided into two 80 MHz bands, and the data field is divided into a first data segment and a second data segment for each 80 MHz band. The first and second data segments can then be constellation mapped to their respective 80 MHz bands and can be LDPC mapped.

[0356] In HEMU transmission, the PPDU coding processor operates independently in the resource unit (RU) for each user and even for the input of the spatial mapping block, except that cyclic shift diversity (CSD) is performed based on the information of the space-time stream start index of the corresponding user. All user data of the RU is mapped through the transmit chain coupled to the spatial mapping block.

[0357] In 802.11ax, phase rotation can be applied to the fields from the legacy preamble to the field immediately preceding the HE-STF, and the phase rotation value can be defined in units of 20 MHz band. In other words, phase rotation can be applied to the L-STF, L-LTF, L-SIG, RL-SIG, HE-SIG-A, and HE-SIG-B fields of the HE PPDU defined in 802.11ax.

[0358] The L-STF field of the HE PPDU may be constructed as follows.

[0359] a) Determine the channel bandwidth from the TXVECTOR parameter CH_BANDWIDTH.

[0360] b) Sequence Generation: Generate the L-STF sequence over the channel bandwidth as described in 27.3.11.3 (L-STF). If a HEER SU PPDU is transmitted, a 3dB power boost is applied as described in 27.3.11.3 (L-STF).

[0361] c) Phase Rotation: Apply the appropriate phase rotation to each 20 MHz subchannel as described in 27.3.10 (Mathematical Description of the Signal) and 21.3.7.5 (Definition of Tone Rotation).

[0362] d) CSD per STS: If the TXVECTOR parameter BEAM_CHANGE is 0, the CSD per STS is applied for each space-time stream and frequency segment as described in 27.3.11.2.2 (Cyclic Shift of HE Modulation Field).

[0363] e) Spatial mapping: If the TXVECTOR parameter BEAM_CHANGE is 0, the A matrix and Q matrix are applied as described in 27.3.11.3 (L-STF).

[0364] f) IDFT: Calculates the Inverse Discrete Fourier Transform.

[0365] g) Per-chain CSD: If the TXVECTOR parameter BEAM_CHANGE is 1 or not present, the per-chain CSD is applied for each transmit chain and frequency bin as described in 27.3.11.2.1 (Cyclic Shift of Pre-HE Modulation Fields).

[0366] h) Insert GI and apply windowing: Pre-GI (T GI,Pre-HE ) and apply windowing as described in 27.3.10 (Mathematical Description of the Signal).

[0367] i) Analog and RF: The resulting complex baseband waveform associated with each transmit chain is up-converted to an RF signal according to the center frequency of the desired channel and transmitted. For details, refer to 27.3.10 (Mathematical Description of Signals) and 27.3.11 (HE Preamble).

[0368] The L-LTF field of the HE PPDU may be constructed as follows.

[0369] a) Determine the channel bandwidth from the TXVECTOR parameter CH_BANDWIDTH.

[0370] b) Sequence Generation: Generate the L-STF sequence over the channel bandwidth as described in 27.3.11.4 (L-STF). If a HEER SU PPDU is transmitted, a 3dB power boost is applied as described in 27.3.11.4 (L-STF).

[0371] c) Phase Rotation: Apply the appropriate phase rotation to each 20 MHz subchannel as described in 27.3.10 (Mathematical Description of the Signal) and 21.3.7.5 (Definition of Tone Rotation).

[0372] d) CSD per STS: If the TXVECTOR parameter BEAM_CHANGE is 0, the CSD per STS is applied to each space-time stream and frequency segment before spatial mapping, as described in 27.3.11.2.2 (Cyclic Shift of HE Modulation Fields).

[0373] e) Spatial mapping: If the TXVECTOR parameter BEAM_CHANGE is 0, the A matrix and Q matrix are applied as described in 27.3.11.4 (L-STF).

[0374] f) IDFT: Calculates the Inverse Discrete Fourier Transform.

[0375] g) Per-chain CSD: If the TXVECTOR parameter BEAM_CHANGE is 1 or not present, the per-chain CSD is applied for each transmit chain and frequency bin as described in 27.3.11.2.1 (Cyclic Shift of Pre-HE Modulation Fields).

[0376] h) Insert GI and apply windowing: Pre-GI (T GI,Pre-HE ) and apply windowing as described in 27.3.10 (Mathematical Description of the Signal).

[0377] i) Analog and RF: The resulting complex baseband waveform associated with each transmit chain is up-converted to an RF signal according to the center frequency of the desired channel and transmitted. For details, refer to 27.3.10 (Mathematical Description of Signals) and 27.3.11 (HE Preamble).

[0378] The L-SIG field of the HE PPDU may be constructed as follows.

[0379] a) Set the RATE subfield in the SIGNAL field to 6 Mb / s. Set the LENGTH, Parity, and Tail fields in the SIGNAL field as described in 27.3.11.5 (L-SIG).

[0380] b) BCC Encoder: The SIGNAL field is encoded by a convolutional encoder at a rate of R = 1 / 2, as described in 27.3.12.5.1 (BCC Coding and Puncturing).

[0381] c) BCC Interleaver: Interleave as described in 17.3.5.7 (BCC Interleaver).

[0382] d) Constellation Mapper: BPSK modulation as described in 27.3.12.9 (Constellation Mapping).

[0383] e) Pilot insertion: Insert pilots as described in 27.3.11.5 (L-SIG).

[0384] f) Extra subcarrier insertion: Four extra subcarriers are inserted at k∈{-28,-27,27,28} for channel estimation, and the values of these four extra subcarriers are {-1,-1,-1,1} respectively.

[0385] If a HE ER SU PPDU is transmitted, a 3 dB power boost is applied to the four additional subcarriers as described in 27.3.11.5 (L-SIG).

[0386] g) Replication and Phase Rotation: The L-SIG field is replicated on each occupied 20 MHz subchannel of the channel bandwidth. Appropriate phase rotation is applied to each occupied 20 MHz subchannel, as described in 27.3.10 (Mathematical Description of the Signal) and 21.3.7.5 (Definition of Tone Rotation).

[0387] h) CSD per STS: If the TXVECTOR parameter BEAM_CHANGE is 0, the CSD per STS is applied to each space-time stream and frequency segment before spatial mapping, as described in 27.3.11.2.2 (Cyclic Shift of HE Modulation Fields).

[0388] i) Spatial mapping: If the TXVECTOR parameter BEAM_CHANGE is 0, the A matrix and Q matrix apply as described in 27.3.11.5 (L-SIG).

[0389] j) IDFT: Calculates the Inverse Discrete Fourier Transform.

[0390] k) Per-chain CSD: If the TXVECTOR parameter BEAM_CHANGE is 1 or not present, per-chain CSD is applied for each transmit chain and frequency bin as described in 27.3.11.2.1 (Cyclic Shift of Pre-HE Modulation Fields).

[0391] l) Insert GI and apply windowing: Pre-GI (T GI,Pre-HE ) and apply windowing as described in 27.3.10 (Mathematical Description of the Signal).

[0392] m) Analog and RF: Up-convert the resulting complex baseband waveform associated with each transmit chain. For details, refer to 27.3.10 (Mathematical Description of Signals) and 27.3.11 (HE Preamble).

[0393] The RL-SIG field of the HE PPDU may be constructed as follows.

[0394] a) Set the RATE subfield in the repeated SIGNAL field to 6 Mb / s. Set the LENGTH Parity and Tail fields in the repeated SIGNAL field as described in 27.3.11.6 (RL-SIG).

[0395] b) BCC Encoder: The repeated SIGNAL field is encoded by a convolutional encoder at a rate of R = 1 / 2, as described in 27.3.12.5.1 (BCC Coding and Puncturing).

[0396] c) BCC Interleaver: Interleave as described in 17.3.5.7 (BCC Interleaver).

[0397] d) Constellation Mapper: BPSK modulation as described in 27.3.12.9 (Constellation Mapping).

[0398] e) Pilot insertion: Insert pilots as described in 27.3.11.6 (RL-SIG).

[0399] f) Extra subcarrier insertion: Four extra subcarriers are inserted at k∈{-28,-27,27,28} for channel estimation, and the values of these four extra subcarriers are {-1,-1,-1,1} respectively.

[0400] If a HE ER SU PPDU is transmitted, a 3 dB power boost is applied to the four additional subcarriers as described in 27.3.11.6 (RL-SIG).

[0401] g) Replication and Phase Rotation: The RL-SIG field is replicated on each occupied 20 MHz subchannel of the channel bandwidth. Appropriate phase rotation is applied to each occupied 20 MHz subchannel, as described in 27.3.10 (Mathematical Description of the Signal) and 21.3.7.5 (Definition of Tone Rotation).

[0402] h) CSD per STS: If the TXVECTOR parameter BEAM_CHANGE is 0, the CSD per STS is applied to each space-time stream and frequency segment before spatial mapping, as described in 27.3.11.2.2 (Cyclic Shift of HE Modulation Fields).

[0403] i) Spatial mapping: If the TXVECTOR parameter BEAM_CHANGE is 0, the A matrix and Q matrix are applied as described in 27.3.11.6 (RL-SIG).

[0404] j) IDFT: Calculates the Inverse Discrete Fourier Transform.

[0405] k) Per-chain CSD: If the TXVECTOR parameter BEAM_CHANGE is 1 or not present, per-chain CSD is applied for each transmit chain and frequency bin as described in 27.3.11.2.1 (Cyclic Shift of Pre-HE Modulation Fields).

[0406] l) Insert GI and apply windowing: Pre-GI (T GI,Pre-HE ) and apply windowing as described in 27.3.10 (Mathematical Description of the Signal).

[0407] m) Analog and RF: Up-convert the resulting complex baseband waveform associated with each transmit chain. For details, refer to 27.3.10 (Mathematical Description of Signals) and 27.3.11 (HE Preamble).

[0408] 4. Applicable embodiments of the present disclosure

[0409] In wireless LAN 802.11 systems, to increase peak throughput, consideration is given to using a wider frequency band than the existing 11ax or using more antennas to transmit additional streams. Furthermore, this specification also considers methods of aggregating multiple links or aggregating multiple RUs and assigning them to a single STA for transmission.

[0410] This specification considers a method for allocating and transmitting multiple RUs to a single STA, and proposes a method for aggregating RUs in various bandwidths. In particular, this specification focuses on and proposes a method for aggregating large RUs in non-OFDMA transmissions.

[0411] In the existing 802.11ax, preamble puncturing is not considered during non-OFDMA transmission. Therefore, non-OFDMA transmission can only use the entire bandwidth of 20 / 40 / 80 / 160 / 160+160 MHz, and the RU used in this case is as follows.

[0412] 242 / 484 / 996 / 2x996 RU

[0413] The above RU will be referred to as a large RU.

[0414] 802.11be introduces preamble puncturing in non-OFDMA transmissions to improve efficiency. This may be based on 20 MHz puncturing, similar to the preamble puncturing in OFDMA in 802.11ax. In this case, non-OFDMA transmission can be performed by combining multiple large RUs. This specification proposes various large RU combinations for non-OFDMA transmissions in each bandwidth scenario as follows. However, a scenario is considered where the preamble puncturing portion does not exceed 50% of the total bandwidth.

[0415] Furthermore, to minimize interference during preamble puncturing in each 80 MHz sub-channel of various bandwidths, the tone plan of the adjacent 20 MHz channel can be replaced with a 20 MHz tone plan, or a tone plan in which only the 20 MHz portion of the 80 MHz tone plan is partially shifted can be used. Of course, it is possible to use the original 80 MHz tone plan as is, without changing the tone plan of the adjacent 20 MHz channel using hardware / filters that effectively control interference, and to transmit data using the remaining channels excluding the 20 MHz channel punctured by the preamble.

[0416] Alternatively, the tone plan is used as is, but when adjacent channels to the 20 MHz channel punctured by the leading pilot use 242-tone RUs, the 802.11ax 242-tone RU method is applied as is for encoding. Alternatively, during transmission, some tones adjacent to the punctured channels within the 242-tone RU can be transmitted using forced puncturing or reduced power. Here, adjacent 20 MHz channels refer to the 20 MHz channels in each 40 MHz subchannel, excluding the 20 MHz channel punctured by the leading pilot, when each 80 MHz subchannel is divided into the lower 40 MHz and upper 40 MHz subchannels.

[0417] Furthermore, in the lower 40 MHz or upper 40 MHz where preamble puncturing is not performed, a 484-tone RU (a 484-tone RU in the corresponding 40 MHz in an 80 MHz tone plan) can be used for data transmission. A 242-tone RU (a 242-tone RU in a 20 MHz in an 80 MHz tone plan or a 242-tone RU in a 20 MHz in a tone plan modified to reduce interference) can be used for data transmission in the 20 MHz adjacent to the 20 MHz where preamble puncturing is performed. This method is directly applicable to all of the following preamble puncturing scenarios.

[0418] 4.1.80MHz

[0419] Figure 22 The channel structure of 80 MHz is shown.

[0420] Despite Figure 22 It is assumed in

[0045] that P20 is located at the lowest frequency, the location may be different and the location of the other 20 MHz channel may be different. A transmission using 996 RUs can be considered where the entire 80 MHz is used, and this would be called PC80.

[0421] Figure 23 An example of preamble puncturing in non-OFDMA 80 MHz transmission is shown.

[0422] In 80MHz non-OFDMA transmission, the preamble puncturing applied to the existing 11ax OFDMA 80MHz transmission can be applied as it is, such as Figure 23 shown.

[0423] Figure 23 , through the combination of 484+242RU, non-OFDMA transmission is possible. This combination will be called PC60.

[0424] Figure 24 An example of additional preamble puncturing in non-OFDMA 80 MHz transmission is shown.

[0425] in addition, Figure 24 The leading perforation can be considered.

[0426] refer to Figure 24 , through the combination of 242+242RU, non-OFDMA transmission is possible. This combination will be called PC40.

[0427] The following summarizes various RU combinations, and the order and position of the RUs within each combination can vary. The brackets refer to the RU combinations for each 80 MHz band. That is, the order and position of the RUs can vary within the brackets (i.e., within each 80 MHz band), and the order and position of the brackets can also vary (i.e., the position and sequence diagram for each 80 MHz band). Because it is 80 MHz, each combination has only one bracket.

[0428] (242+242), (484+242), (996)

[0429] 4.2.160 / 80+80MHz

[0430] Figure 25 An example of a 160 / 80+80 MHz channel configuration is shown.

[0431] Figure 25 The channel structure of 160 / 80+80 MHz is shown. For the 160 / 80+80 MHz tone plan, the 80 MHz tone plan is repeated twice.

[0432] 1) In P80, two combinations of PC60 and PC40, as proposed for 4.1.80 MHz transmission, can be considered. Furthermore, it is possible to consider a case where only the Primary 40 (P40) is transmitted in P80, and transmission using 484 RUs (hereinafter referred to as PC40 with a combination of 242+242 RUs) is possible. Furthermore, it is possible to consider transmission using only the 242 RUs of the P20, and this is referred to as PC20. Furthermore, it is possible to consider transmission using all 996 RUs of the P80, and this is referred to as PC80.

[0433] 2) When considering preamble puncturing in the existing 802.11ax, there is no need to perform at least 20 MHz puncturing in S80. In this case, S80 can consider various combinations of RUs as follows.

[0434] 242RU: This will be called SC20.

[0435] 484RU, 242+242RU: This will be called SC40.

[0436] 484+242RU: This will be called SC60.

[0437] 996RU: This will be called SC80.

[0438] The RU combination of P80 includes PC20, PC40, PC60 and PC80, and the RU combination of S80 includes SC20, SC40, SC60 and SC80.

[0439] In this case, considering the preamble puncturing of 160 / 80+80 MHz, the following various combinations can be proposed, which is not always the case that the punctured channels are 50% or more.

[0440] PC40+SC40 、 PC40+SC60 、 PC40+SC80 、 PC60+SC20 、PC60+SC40、 PC60+SC60 、 PC60+SC80

[0441] PC20+SC60, PC20+SC80 , PC80+SC20, PC80+SC40, PC80+SC60, PC80+SC80 (996+996RU or 2x996RU)

[0442] The meaning of the above underline is to indicate only representative combinations among all combinations that exclude repeated combinations. If PC40+SC60 is expressed as RU, it can be expressed as (484RU)+(484+242RU) or (242+242RU)+(484+242RU). If PC60+SC40 is expressed as RU, it can be expressed as (484+242RU)+(484RU) or (484+242RU)+(242+242RU). The meaning of the brackets means the combination within the 80MHz channel. Therefore, the combination of PC40+SC60 and PC60+SC40 is the same, and one can be excluded. All combinations of the following underlines have the same meaning.

[0443] The following summarizes various RU combinations, and the order and position of the RUs within each combination can vary. The brackets refer to the RU combinations for each 80 MHz band. That is, the order and position of the RUs can vary within the brackets (i.e., within each 80 MHz band), and the order and position of the brackets can also vary (i.e., within each 80 MHz band and in the sequence diagram).

[0444] (242)+(484+242), (242)+(996), (242+242)+(242+242), (242+242)+(484), (484)+(484), (242+242)+(484+242), (484)+(484+242), (242+242)+(996), (484)+(996), (484+242)+(484+242), (484+242)+(996), (996)+(996) / 2x996

[0445] In particular, we can consider (484+242)+(996) in which only one 20 MHz is punctured and (484)+(996) in which one continuous 40 MHz is punctured. In addition, we can consider (242)+(996) and (484)+(484+242) in which only one continuous 60 MHz is punctured (when the continuous 60 MHz is punctured at the boundary between two 80 MHz), and (484+242)+(484+242) in which only one continuous 40 MHz is punctured (when the continuous 40 MHz is punctured at the boundary between two 80 MHz). In addition, (242+242)+(996) in which only one continuous 40 MHz is punctured (when the continuous 40 MHz starts from the center of a specific 80 MHz, that is, when the two center 20 MHz are punctured) can be additionally considered. In addition, (484)+(484), (242)+(484+242) (in the case of continuous 80 MHz puncture at the boundary of 2 80 MHz) in which only 1 continuous 80 MHz is punctured can be additionally considered.

[0446] It is possible to consider puncturing only one continuous 20 or 40 MHz combination in each primary and secondary 80. For example, it is possible to have combinations of (484+242)+(484+242), (484)+(484), (484)+(242+242), and (242+242)+(242+242). As another example, it is possible to have combinations of (484+242)+(484) and (484+242)+(242+242).

[0447] 4.3.240 / 160+80MHz

[0448] Figure 26 This is an example of 240 / 160+80 MHz derived from a continuous 320 MHz.

[0449] Assume that the 240 / 160+80MHz channel is fixed to three specific 80MHz channels. In this case, the 240 / 160+80MHz channel configuration can consider the following three cases: For the 240 / 160+80MHz tone plan, the 80MHz tone plan is repeated 3 times.

[0450] Case 1: Primary 80 (P80) + Secondary 80 (S80) + Lower 80 (L80)

[0451] Case 2: Primary 80 (P80) + Secondary 80 (S80) + Higher 80 (H80)

[0452] Case 3: Main 80 (P80) + Lower 80 (L80) + Upper 80 (H80)

[0453] P80 and S80 constitute the main 160 (P160), and L80 and H80 constitute the sub 160 (S160).

[0454] Figure 27 This is an example of a continuous 240 MHz being derived from a continuous 320 MHz.

[0455] For 240 / 160+80MHz derived from continuous 320MHz, only continuous 240MHz can be considered, such as Figure 27 shown.

[0456] Figure 28 It is an example of non-contiguous 160+80 MHz derived from non-contiguous 160+160 MHz.

[0457] For 240 / 160+80MHz derived from non-contiguous 160+160MHz, only non-contiguous 160+80MHz can be considered, such as Figure 28 shown.

[0458] 1) In all three cases, it is possible to use the RU combination in P80 as suggested in 4.1. and 4.2.

[0459] 2) In Case 1, at least one 20 MHz channel in L80 should not be punctured, and therefore, the RU combinations in S80 suggested in 4.2. can be used as is. In Case 1, if at least one 20 MHz channel in S80 is not punctured, the RU combinations in S80 suggested in 4.2. can be used as is. Various RU combinations within the total bandwidth in Case 1 can be proposed as follows. This assumes that the number of channels that are not always punctured is 50% or more.

[0460] If all S80s were perforated

[0461] PC40+SC80 、 PC60+SC60 、 PC60+SC80

[0462] PC80+SC40, PC80+SC60, PC80+SC80 (996+996RU or 2x996RU)

[0463] If at least one 20MHz is not punctured in S80

[0464] PC40+SC20+SC60 、 PC40+SC20+SC80 、 PC40+SC40+SC40 、 PC40+SC40+SC60 、 PC40+SC40 +SC80, PC40+SC60+SC20, PC40+SC60+SC40, PC40+SC60+SC60 、 PC40+SC60+SC80 , PC40+SC80+SC20, PC40+SC80+SC40, PC40+SC80+SC60, PC40+SC80+SC80 、PC60+SC20+SC40、 PC60+SC20+ SC60 、 PC60+SC20+SC80 , PC60+SC40+SC20, PC60+SC40+SC40, PC60+SC40+SC60, PC60+SC40+SC80, PC60+SC60+SC20, PC60+SC60+SC40, PC60+SC60+SC60 、 PC60+SC60+SC80 , PC60+SC80+SC20, PC60+SC80+SC40, PC60+SC80+SC60, PC60+SC80+SC80

[0465] PC20+SC20+SC80 , PC20+SC40+SC60, PC20+SC40+SC80, PC20+SC60+SC40, PC20+SC60+SC60, PC20+SC60+SC80, PC20+SC80+SC20, PC20+SC80+SC40, PC20+SC80+SC60, PC20+SC80+ SC80 , PC80+SC20+SC20, PC80+SC20+SC40, PC80+SC20+SC60, PC80+SC20+SC80, PC80+SC40+SC20, PC80+SC40+SC40, PC80+SC40+SC60, PC80+SC 40+SC80, PC80+SC60+SC20, PC80+SC60+SC40, PC80+SC60+SC60, PC80+SC60+SC80, PC80+SC80+SC20, PC80+SC80+SC40, PC80+SC80+SC60, PC80+SC80+SC80 (or 996+996+996RU or 996+2x996 RU or 3x996 RU)

[0466] 2) In Case 2, at least one 20 MHz band in H80 should not be punctured, so the RU combinations in S80 recommended in 4.2. can be used as is. In Case 2, if at least one 20 MHz band in S80 is not punctured, the RU combinations in S80 recommended in 4.2. can be used as is. Therefore, in Case 2, the various RU combinations in the total bandwidth are the same as in Case 1.

[0467] 3) In case 3, at least one 20 MHz in S160 should not be punctured, and one 20 MHz does not need to be punctured in the 80 MHz of L80 or H80, while all other 80 MHz may or may not be punctured. Therefore, in case 3, the various RU combinations in the total bandwidth are the same as in case 1.

[0468] The following summarizes various RU combinations, and the order and position of the RUs within each combination can vary. The brackets refer to the RU combinations for each 80 MHz. That is, the order and position of the RUs can vary within the brackets (i.e., within each 80 MHz), and the order and position of the brackets can also vary (i.e., the position and sequence diagram for each 80 MHz).

[0469] (242+242)+(996), (484)+(996), (484+242)+(484+242), (484+242)+(996), (996)+(996) / 2x996

[0470] <h2 style=";text-align:left;direction:ltr">(242)+(242)+(996)、(242)+(242+242)+(484+242)、(242)+(484)+(484+242)、(242)+(242+242)+(996)、(242)+(484)+(996)、(242)+(484+242)+(484+242)、(242)+(484+242)+(996)、(242)+(996)+ (996)、(242+242)+(242+242)+(242+242)、(242+242)+(242+242)+(484)、(242+242)+(484)+(484)、(484)+(484)+(484)、(242+242)+(242+242)+(484)+(484+242)、(484)+(484) 4)+(484+242)、(242+242)+(242+242)+(996)、(242+242)+(484)+(996)、(484)+(484)+(996)、(242+242)+(484+242)+(484+242)、(484)+(484+242)+(484+242)、(242+242)+(484+242)+(996)、(484)+ (484+242)+(996)、(242+242)+(996)+(996)、(484)+(996)+(996)、(484+242)+(484+242)+(484+242)、(484+242)+(484+242)+(996)、(484+242)+(996)、(996)+(996)+(996) / 2x996+996 / 3x996<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0471] In particular, it is possible to consider only (484)+(996)+(996) in which only one consecutive 40 MHz is punctured and (996)+(996) in which only one consecutive 80 MHz is punctured. In addition, it is possible to consider (484+242)+(484+242)+(996) where only one continuous 40 MHz is punctured (in the case where the continuous 40 MHz is punctured at the boundary between two specific 80 MHz), (242)+(996)+(996), (484)+(484+242)+(996) where only one continuous 60 MHz is punctured (in the case where the continuous 60 MHz is punctured at the boundary between two specific 80 MHz), and (484+242)+(996), (484)+(484)+(996) and (242)+(484+242)+(996) where only one continuous 80 MHz is punctured (in the case where the continuous 80 MHz is punctured at the boundary between two specific 80 MHz. Furthermore, (242+242)+(996)+(996) in which only one continuous 40 MHz is punctured (in the case of continuous 40 MHz starting from the center of a specific 80 MHz, ie, when two center 20 MHz are punctured) can be additionally considered.

[0472] It is possible to consider puncturing only one continuous 40 MHz or 60 MHz block in each 80 or 160 MHz block. For example, there may be combinations of (484) + (484) + (996), (484) + (242 + 242) + (996), (484) + (484 + 242) + (484 + 242), (242 + 242) + (484) + (996), (242 + 242) + (242 + 242) + (996), (242 + 242) + (484 + 242) + (484 + 242), (242) + (242) + (996), and (242) + (484) + (484 + 242).

[0473] As another example, there may be combinations of (484)+(242)+(996), (484)+(484)+(484+242), (242+242)+(242)+(996), (242+242)+(484)+(484+242), (242)+(484)+(996), (242)+(242+242)+(996), (242)+(484)+(242)+(484+242).

[0474] 4.4.320 / 160+160MHz

[0475] Figure 29The channel structure of 320 / 160+160 MHz is shown. For the 320 / 160+160 MHz tone plan, the 80 MHz tone plan is repeated four times.

[0476] In 320 / 160+160 MHz, the preamble puncturing pattern may vary depending on the 240 / 160+80 MHz channel configuration, and considering the 240 / 160+80 MHz channel configuration as shown below, RU combinations are proposed. In all three cases, the RU combinations in P80 can be used as recommended in 4.1. and 4.2.

[0477] 4.4.1.240 / 160+80MHz Channel Configuration Scenario 1

[0478] At least one of the 20 MHz channels in H80 must be non-punctured, so the RU combinations in S80 proposed in 4.2. can be used as is. If at least one 20 MHz channel in S80 or L80 is non-punctured, the RU combinations in S80 proposed in 4.2. can be used as is. Various RU combinations across the entire bandwidth can be proposed as follows. This does not always apply to the case where the number of punctured channels is 50% or more.

[0479] If both S80 and L80 are perforated

[0480] PC20+SC80, PC40+SC80, PC60+SC60, PC60+SC80, PC80+SC80 Except for PC80+SC80, the above cases are not considered because the non-perforated channels do not exceed 50%.

[0481] If at least one 20MHz is not punctured within the 80MHz of S80 or L80

[0482] PC40+SC40+SC80 、 PC40+SC60+SC60 、 PC40+SC60+SC80 , PC40+SC80+SC40, PC40+SC80+SC60, PC40+SC80+SC80 、 PC60+SC20+SC80 , PC60+SC40+SC60, PC60+SC40+SC80, PC60+SC60+SC40, PC60+SC60+SC60 , PC60+SC60+SC80, PC60+SC80+SC20, PC60+SC80+SC40, PC60+SC80+SC60, PC60+SC80+SC80

[0483] PC20+SC60+SC80, PC20+SC80+SC60, PC20+SC80+SC80, PC80+SC20+SC60, PC80+SC20+SC80, PC80+SC40+SC40, PC80+SC40+SC60, PC80+SC40+SC80, PC80+SC60+SC20 , PC80+SC60+SC40, PC80+SC60+SC60, PC80+SC60+SC80, PC80+SC80+SC20, PC80+SC80+SC40, PC80+SC80+SC60, PC80+SC80+SC80 (or 996+996+996RU or 996+2x996 RU or 3x996 RU)

[0484] If at least one 20MHz is not punctured within the 80MHz of both S80 and L80

[0485] PC40+SC20+SC20+SC80 、 PC40+SC20+SC40+SC60 、 PC40+SC20+SC40+SC80 、PC40+SC20+SC60+SC40、 PC40+SC20+SC60+SC60 、 PC40+SC20+SC60+SC80 , PC40+SC20+SC80+SC20, PC40+SC20+SC80+SC40, PC40+SC20+SC80+SC60, PC40+SC20+SC80+SC80 , PC40+SC40+SC20+SC60, PC40+SC40+SC20+SC80, PC40+SC40+SC40+SC40 、 PC40+SC40+SC40+SC60 、 PC40+SC40+SC40+ SC80 , PC40+SC40+SC60+SC20, PC40+SC40+SC60+SC40, PC40+SC40+SC60+SC60 、 PC40+SC40+ SC60+SC80 , PC40+SC40+SC80+SC20, PC40+SC40+SC80+SC40, PC40+SC40+SC80+SC60, PC40+ SC40+SC80+SC80 , PC40+SC60+SC20+SC40, PC40+SC60+SC20+SC60, PC40+SC60+SC20+SC80, PC40+SC60+SC40+SC20, PC40+SC60 +SC40+SC40, PC40+SC60+SC40+SC60, PC40+SC60+SC40+SC80, PC40+SC60+SC60+SC20, PC40+SC60+SC60+SC40, PC40+SC60+SC60+SC60 、 PC40+SC60+ SC60+SC80、PC40+SC60+SC80+SC20、PC40+SC60+SC80+SC40、PC40+SC60+SC80+SC60、 PC40+ SC60+SC80+SC80 、PC40+SC80+SC20+SC20、PC40+SC80+SC20+SC40、PC40+SC80+SC20+SC60、PC40+SC80+SC20+SC80、PC40+SC80+SC40+SC20、PC40+SC80+SC40+SC40、PC40+SC80+SC40+SC60、PC40+SC80+SC40+SC80、PC40+SC80+SC60+SC20、PC40+SC 80+SC60+SC40、PC40+SC80+SC60+SC60、PC40+SC80+SC60+SC80、PC40+SC80+SC80+SC20、PC40+SC80+SC80+SC40、PC40+SC80+SC80+SC60、 PC40+SC80+SC80+SC80

[0486] PC60+SC20+SC20+SC60 、 PC60+SC20+SC20+SC80 、PC60+SC20+SC40+SC40、PC60+SC20+SC40+SC60、PC60+SC20+SC40+SC80、PC60+SC20+SC60+SC20、PC60+SC20+SC60+SC40、 PC60+ SC20+SC60+SC60 、 PC60+SC20+SC60+SC80 、PC60+SC20+SC80+SC20、PC60+SC20+SC80+SC40、PC60+SC20+SC80+SC60、 PC60+SC20+SC80+SC80、PC60+SC40+SC20+SC40、PC60+SC40+SC20+SC60、PC60+SC40+SC20+SC80、PC60+SC40+SC40+SC20、PC60+SC40+SC40+SC40、PC60+SC40+SC40+SC60、PC60+SC40+SC40+SC80、PC60+SC40+SC60+SC20、PC60+SC40+SC60+SC40、PC60+SC40+SC60+SC60、PC60+SC40+SC60+SC80、PC60+SC40+SC80+SC20、PC60+SC40+SC80+SC40、PC60+SC40+SC80+SC60、PC60+SC40+SC80+SC80、PC60+SC60+SC20+SC20、PC60+SC60+SC20+SC40、PC60+SC60+SC20+SC60、PC60+SC60+SC20+SC80、PC60+SC60+SC40+SC20、PC60+SC60+SC40+SC40、PC60+SC60+SC40+SC60、PC60+SC60+SC40+SC80、PC60+SC60+SC60+SC20、PC60+SC60+SC60+SC40、 PC60+SC60+SC60+SC60 、 PC60+SC60+SC60+SC80 、PC60+SC60+SC80+SC20、PC60+SC60+SC80+SC40、PC60+SC60+SC80+SC60、 PC60+SC60+SC80+SC80 、PC60+SC80+SC20+SC20、PC60+SC80+SC20+SC40、PC60+SC80+SC20+SC60、PC60+SC 80+SC20+SC80、PC60+SC80+SC40+SC20、PC60+SC80+SC40+SC40、PC60+SC80+SC40+SC60、PC60+SC80+SC40+SC80、PC60+SC80+SC60+SC20、PC60+SC80+SC60+SC40、PC60+SC80+SC60+SC60、PC60+SC80+SC60+SC80、PC60+SC80+SC80+SC20、PC60+SC80+SC80+SC40、PC60+SC80+SC80+SC60、 PC60+SC80+SC80+ SC80

[0487] PC20+SC20+SC40+SC80、PC20+SC20+SC60+SC60、PC20+SC20+SC60+SC80、PC20+SC20+SC80+SC40、PC20+SC20+SC80+SC60、 PC20+SC20+SC80+SC80 、PC20+SC40+SC20+SC80、PC20+SC40+SC40+SC60、PC20+SC40+SC40+SC80、PC20+SC40+SC60+SC40、PC20+SC40+S C60+SC60、PC20+SC40+SC60+SC80、PC20+SC40+SC80+SC20、PC20+SC40+SC80+SC40、PC20+SC40+SC80+SC60、PC20 +SC40+SC80+SC80、PC20+SC60+SC20+SC60、PC20+SC60+SC20+SC80、PC20+SC60+SC40+SC40、PC20+SC60+SC40+SC60、PC20+SC60+SC40+SC80、PC20+SC60+SC60+SC20、PC20+SC60+SC60+SC40、PC20+SC60+SC60+SC60、PC20+SC60 +SC60+SC80、PC20+SC60+SC80+SC20、PC20+SC60+SC80+SC40、PC20+SC60+SC80+SC60、PC20+SC60+SC80+SC80、P C20+SC80+SC20+SC40、PC20+SC80+SC20+SC60、PC20+SC80+SC20+SC80、PC20+SC80+SC40+SC20、PC20+SC80+SC40 +SC40、PC20+SC80+SC40+SC60、PC20+SC80+SC40+SC80、PC20+SC80+SC60+SC20、PC20+SC80+SC60+SC40、PC20+SC 80+SC60+SC60、PC20+SC80+SC60+SC80、PC20+SC80+SC80+SC20、PC20+SC80+SC80+SC40、PC20+SC80+SC80+SC60、 PC20+SC80+SC80+SC80

[0488] PC80+SC20+SC20+SC40、PC80+SC20+SC20+SC60、PC80+SC20+SC20+SC80、PC80+SC20+SC40+SC20、PC80+SC20+SC40+SC40、PC80+SC20+SC40+SC60、PC80+SC20+SC40+SC80、PC80+SC20+SC60+SC20、PC80+SC20+SC60+SC40、PC80+SC20+SC60+SC60、PC80+SC20+SC60+SC80、PC80+SC20+SC80+SC20、PC80+SC20+SC80+SC40、PC80+SC20+SC80+SC60、PC80+SC20+SC80+SC80、PC80+SC40+SC20+SC20、PC80+SC40+SC20+SC40、PC80+SC40+SC20+SC60、PC80+SC40+SC20+SC80、PC80+SC40+SC40+SC20、PC80+SC40+SC40+SC40、PC80+SC40+SC40+SC60、PC80+SC40+SC40+SC80、PC80+SC40+SC60+SC20、PC80+SC40+SC60+SC40、PC80+SC40+SC60+SC60、PC80+SC40+SC60+SC80、PC80+SC40+SC80+SC20、PC80+SC40+SC80+SC40、PC80+SC40+SC80+SC60、PC80+SC40+SC80+SC80、PC80+SC60+SC20+SC20、PC80+SC60+SC20+SC40、PC80+SC60+SC20+SC60、PC80+SC60+SC20+SC80、PC80+SC60+SC40+SC20、PC80+SC60+SC40+SC40、PC80+SC60+SC40+SC60、PC80+SC60+SC40+SC80、PC80+SC60+SC60+SC20、PC80+SC60+SC60+SC40、PC80+SC60+SC60+SC60、PC80+SC60+SC60+SC80、PC80+SC60+SC80+SC20、PC80+SC60+SC80+SC40、PC80+SC60+SC80+SC60、PC80+SC60+SC80+SC80、PC80+SC80+SC20+SC20、PC80+SC80+SC20+SC40、PC80+SC80+SC20+SC60、PC80+SC80+SC20+SC80, PC80+SC80+SC40+SC20, PC80+SC80+SC40+SC40, PC80+SC80+SC40+SC60, PC80+SC80+SC40+SC80, PC80+SC80+SC60+SC20, PC80+SC80+SC60+SC40, PC80+SC80+SC60+SC60, PC80+SC80+SC60+SC80, PC80+SC80+SC80+SC20, PC80+SC80+SC80+SC40, PC80+SC80+SC80+SC60, PC80+SC80+SC80+SC80 (or 2x996+2x996 RU or 996+996+2x996 RU or 996+3x996 RU or 996+996+996+996RU)

[0489] 4.4.2.240 / 160+80MHz Channel Configuration Scenario 2

[0490] At least one of the 20 MHz channels in L80 cannot be punctured, so the RU combinations in S80 proposed in 4.2. can be used as is. If at least one 20 MHz channel in S80 or H80 is not punctured, the RU combinations in S80 proposed in 4.2. can be used as is. Therefore, the various RU combinations in the entire bandwidth are the same as those proposed in 4.4.1.

[0491] 4.4.3.240 / 160+80MHz Channel Configuration Scenario 3

[0492] At least one of the 20MHz channels of L80 should not be punctured, and therefore, the RU combination in S80 proposed in 4.2. can be used as is. In addition, at least one 20MHz in S160 must not be punctured, which means that one 20MHz does not have to be punctured in the 80MHz of L80 or H80, and the other 80MHz may be punctured or not. Therefore, when at least one 20MHz in the 80MHz of S80 or L80 is not punctured, and in both S80 and L80, if at least one 20MHz in the 80MHz is not punctured, the various RU combinations in the entire bandwidth are the same as the recommended combinations among the RU combinations proposed in 4.4.1.

[0493] The following summarizes various RU combinations, and the order and position of the RUs within each combination can vary. The brackets refer to the RU combinations for each 80 MHz band. That is, the order and position of the RUs can vary within the brackets (i.e., within each 80 MHz band), and the order and position of the brackets can also vary (i.e., the position and sequence diagram for each 80 MHz band).<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0494] <h2 style=";text-align:left;direction:ltr"> (996)+(996) / 2x996<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0495] <h2 style=";text-align:left;direction:ltr"> (242)+(484+242)+(996)、(242)+(996)+(996)、(242+242)+(242+242)+(996)、(242+242)+(448)+(996)、(448)+(448)+(996)、(242+242)+(484+242)+(484+242)、(242+242)+(484+242 )+(996)、(484)+(484+242)+(996)、(242+242)+(996)+(996)、(484)+(996)+(996)、(484+242)+(484+242)+(484+242)、(484+242)+(484+242)+(996)、(484+242)+(996)、(996)+(996)+(996) / 2x996+996 / 3x996<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0496] (242)+(242)+(242+242)+(996)、(242)+(242)+(484)+(996)、(242)+(242)+(484+242)+(484+242)、(242)+(242)+(484+242)+(996)、(242)+(242)+(996)+(996)、(242)+(242+242)+(242+242)+(484+242)、(242)+(242+242)+(484)+(484+242)、(242)+(484)+(484)+(484+242)、(242)+(242+242)+(242+242)+(996)、(242)+(242+242)+(484)+(996)、(242)+(484)+(484)+(996)、(242)+(242+242)+(484+242)+(484+242)、(242)+(484)+(484+242)+(484+242)、(242)+(242+242)+(484+242)+(996)、(242)+(484)+(484+242)+(996)、(242)+(242+242)+(996)+(996)、(242)+(484)+(996)+(996)、(242)+(484+242)+(484+242)+(484+242)、(242)+(484+242)+(484+242)+(996)、(242)+(484+242)+(996)+(996)、(242)+(996)+(996)+(996)、(242+242)+(242+242)+(242+242)+(242+242)、(242+242)+(242+242)+(242+242)+(484)、(242+242)+(242+242)+(484)+(484)、(242+242)+(484)+(484)+(484)、(484)+(484)+(484)+(484)、(242+242)+(242+242)+(242+242)+(484+242)、(242+242)+(242+242)+(484)+(484+242)、(242+242)+(484)+(484)+(484+242)、(484)+(484)+(484)+(484+242)、(242+242)+(242+242)+(242+242)+(996)、(242+242)+(242+242)+(484)+(996)、<h2 style=";text-align:left;direction:ltr">(242+242)+(484)+(484)+(996)、(484)+(484)+(484)+(996)、(242+242)+(242+242)+(484+242)+(484+242)、(242+242)+(484)+(484+242)+(484+242)、(242+242)+(242+242)+(484+242)+(996)、(24 2+242)+(484)+(484+242)+(996)、(484)+(484)+(484+242)+(996)、(242+242)+(242+242)+(996)+(996)、(242+242)+(484)+(996)+(996)、(484)+(484)+(996)+(996)、(242+242)+(484+242)+(484+242)、(484)+(484+242)+(484+242)、(484)+(484+242)+(484 4+242)+(484+242)、(242+242)+(484+242)+(484+242)+(996)、(484)+(484+242)+(484+242)+(996)、(242+242)+(484+242)+(996)+(996)、(484)+(484+242)+(996)+(996)、(242+242)+(996)+(996)、(484)+(996)+(996)、(4 84+242)+(484+242)+(484+242)+(484+242)、(484+242)+(484+242)+(484+242)+(996)、(484+242)+(484+242)+(996)+(996)、(484+242)+(996)+(996)、(996)+(996)+(996)+(996) / 996+996+2x996 / 2x996+2x996 / 996+3x996 / 4x996、<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0497] In particular, only (484)+(996)+(996)+(996) in which only one continuous 40 MHz is punctured and (996)+(996)+(996) in which only one continuous 80 MHz is punctured can be considered. In addition, only (484+242)+(484+242)+(996)+(996) in which only one continuous 40 MHz is punctured (in the case where the continuous 40 MHz is punctured at the boundary between two specific 80 MHz) and (242)+(996)+(996)+(996) in which only one continuous 60 MHz is punctured (in the case where the continuous 60 MHz is punctured at the boundary between two specific 80 MHz) can be considered. In addition, (484)+(484+242)+(996)+(996), (484)+(484)+(996)+(996), (484)+(484)+(996)+(996), and (484)+(484)+(996)+(996) in which only one continuous 80 MHz is punctured (in the case of continuous 80 MHz punctured at the boundary between two specific 80 MHz) and (242)+(484+242)+(996)+(996). In addition, (242+242)+(996)+(996)+(996) in which only one continuous 40 MHz is punctured (in the case of continuous 40 MHz starting from the center of a specific 80 MHz, that is, when two center 20 MHz are punctured) can be additionally considered.

[0498] Combinations of only one continuous 40, 60, or 80 MHz puncture in each primary and secondary 160 may be considered. For example, there may be (484)+(996)+(484)+(996), (484)+(996)+(484+242)+(484+242), (484)+(996)+(242+242)+(996), (484+242)+(484+242)+(484+242)+(484+242), (484+242)+(484+242)+(242+242)+(996), (242+242)+(996)+(242+242)+(996), (242+242)+(996)+(242+242)+(996), (242+996)+(242+242)+(996). The combination of (242)+(996), (242)+(996)+(484)+(484+242), (484)+(484+242)+(484)+(484+242), (996)+(996), (996)+(484)+(484), (996)+(242)+(484+242), (484)+(484)+(484)+(484), (484)+(484)+(242)+(484+242), (242)+(484+242)+(242)+(484+242).

[0499] As another example, there may be combinations of (484)+(996)+(242)+(996), (484)+(996)+(484)+(484+242), (484+242)+(484+242)+(242)+(996), (484+242)+(484+242)+(484)+(484+242), (242+242)+(996)+(242)+(996), and (242+242)+(996)+(484)+(484+242).

[0500] There may be combinations of (484)+(996)+(996), (484)+(996)+(484)+(484), (484)+(996)+(242)+(484+242), (484+242)+(484+242)+(996), (484+242)+(484+242)+(484), (484+242)+(484+242)+(242)+(484+242), (242+242)+(996)+(996), (242+242)+(996)+(484)+(484), and (242+242)+(996)+(242)+(484+242).

[0501] There may be combinations of (242)+(996)+(996), (242)+(996)+(484)+(484), (242)+(996)+(242)+(484+242), (484)+(484+242)+(996), (484)+(484+242)+(484)+(484), and (484)+(484+242)+(242)+(484+242).

[0502] Next, a method of indicating or scheduling the above-mentioned perforation pattern and RU aggregation is proposed.

[0503] 4.5. Signaling Method

[0504] Figure 30 An example of the EHT PPDU format is shown.

[0505] Figure 31 An example of the U-SIG format is shown.

[0506] The above indicators for RU aggregation can be found in Figure 30 EHT-SIG of the EHT PPDU or Figure 31 Sent within the U-SIG.

[0507] Figure 31 The version-independent fields may include a 3-bit version identifier indicating 802.11be and Wi-Fi versions after 802.11be, a 1-bit DL / UL field, a BSS color, and a TXOP duration, etc. Figure 31 The version-related fields may include information such as PPDU type and bandwidth.

[0508] In the U-SIG, two symbols are jointly encoded, and each 20 MHz band consists of 52 data tones and 4 pilot tones. Furthermore, the U-SIG is modulated in the same manner as the HE-SIG-A, i.e., with BPSK rate 1 / 2.

[0509] The EHT-SIG can be divided into a common field and a user-specific field, can be encoded with a variable MCS, and can indicate information about the exact puncturing pattern and RU aggregation used for transmission in the common field. In addition, in order to indicate whether to apply a shifted tone plan in an adjacent 20MHz channel, or change to a 20MHz tone plan when applying preamble puncturing, or whether to use the tone plan as is but puncture some tones or transmit some tones at low power, one bit of information can be sent in the version-related field of the U-SIG or the common field of the EHT-SIG.

[0510] Figure 32 is a process flow chart illustrating the operation of the transmitting apparatus according to the present embodiment.

[0511] Figure 32 The example of can be performed by a transmitting device (AP and / or non-AP STA). For example, Figure 24 An example of may be performed by an AP that transmits an EHT SU PPDU, an EHT ER SU PPDU, or an EHT MU PPDU. Figure 32 An example of may be performed by a non-AP that transmits an EHT SU PPDU, an EHT ER SU PPDU, and an EHT MU PPDU.

[0512] Figure 32 Some steps in each step of the example (or detailed sub-steps to be described later) may be omitted or changed.

[0513] In step S3210, the transmitting device (ie, transmitting STA) configures bandwidth (BW) and RU allocation, and allocates multiple RUs to a specific user or STA through the multi-RU aggregation combination in paragraph 4.2 of the above description. In addition, the transmitting device can perform channel access operations.

[0514] In step S3220, the transmitting STA may configure a PPDU. For example, the PPDU may be an EHT SU PPDU, an EHT ERSU PPDU, or an EHT MU PPDU. The PPDU may include: Figure 18 The EHT-SIG shown in .

[0515] The transmitting STA may perform step S3220 based on the BW, RU allocation, and multi-RU aggregation determined in step S3210.

[0516] That is, as described above, specific (RU allocation) n-bit (eg, 8-bit) information may be included in the common field of the EHT-SIG, and information on multi-RU aggregation may be included in the user-specific field.

[0517] In step S3230 , the transmitting device may transmit the PPDU configured in step S3220 to the receiving device based on step S3230 .

[0518] When executing step S3230, the transmitting device may perform at least one of CSD, spatial mapping, IDFT / IFFT operation, GI insertion, etc.

[0519] Signals / fields / sequences constructed according to this specification can be Figure 18 sent in the form of .

[0520] For example, the EHT-SIG may be transmitted based on a number of OFDM symbols. For example, one OFDM symbol may include 26 bits of information. The 26 bits of information may include the 4 bits of BW information. Any m bits of information may be used instead of the 26 bits of information.

[0521] For 26 bits of information, BCC coding with 1 / 2 low efficiency can be applied. Interleaving by the interleaver can be applied to the BCC-coded bits (i.e., 52 bits). Mapping by the constellation mapper can be performed on the interleaved 52 bits. Specifically, the BPSK module can be applied to generate 52 BPSK symbols. The 52 BPSK symbols can be matched to the remaining frequency domains (-28 to +28) except the DC tone and the pilot tone (-21, -7, +7, +21) tone. Thereafter, it can be sent to the receiving STA through phase rotation, CSD, spatial mapping, IDFT / IFFT operations, etc.

[0522] The above PPDU can be based on Figure 1 device to send.

[0523] Figure 1 The examples relate to examples of transmitting devices (AP and / or non-AP STA).

[0524] like Figure 1 As shown in , the sending device (or transmitter) may include a memory 112 , a processor 111 and a transceiver 113 .

[0525] The memory 112 may store information regarding a plurality of tone plans / RUs described in this specification.

[0526] The processor 111 may generate various RUs and configure PPDUs based on the information stored in the memory 112. An example of the PPDU generated by the processor 111 may be as follows: Figure 18 As shown in .

[0527] The processor 111 may execute Figure 32 All / part of the actions shown.

[0528] The illustrated transceiver 113 includes an antenna and can perform analog signal processing. Specifically, the processor 111 can control the transceiver 113 to transmit the PPDU generated by the processor 111.

[0529] Alternatively, the processor 111 may generate a transmission PPDU and store information about the transmission PPDU in the memory 112 .

[0530] Figure 33 is a process flow chart illustrating the operation of the receiving apparatus according to the present embodiment.

[0531] Figure 33 Examples of may be performed in a receiving device (AP and / or non-AP STA).

[0532] Figure 33 The example of can be performed by a receiving device (AP and / or non-AP STA). For example, Figure 33 An example of may be performed by a non-AP that receives an EHT SU PPDU, an EHT ER SU PPDU, or an EHT MU PPDU. Figure 33 An example of may be performed by an AP that transmits an EHT SU PPDU or an EHT ER SU PPDU.

[0533] Figure 33 Some steps in each step of the example (or detailed sub-steps to be described later) may be omitted.

[0534] In step S3310, the receiving device (receiving STA) may receive all or part of the PPDU through step S3310. The received signal may be in the form Figure 18 form.

[0535] The sub-steps of step S3310 can be based on Figure 32That is, in step S3310, an operation for restoring the results of the CSD, spatial mapping, IDFT / IFFT operations, and GI insertion operations applied in step S3230 may be performed.

[0536] In step S3320, the receiving STA may obtain information about the BW, RU allocation, and multi-RU aggregation of the EHT PPDU by decoding information included in the U-SIG or the EHT-SIG.

[0537] In this way, the receiving STA can complete decoding of other fields / symbols of the received PPDU.

[0538] As a result, the receiving STA can decode the data field included in the PPDU through step S3320. Thereafter, the receiving STA can perform a processing operation to transmit the data decoded from the data field to a higher layer (e.g., a MAC layer). In addition, when the generation of a signal is instructed from the upper layer to the PHY layer in response to the data transmitted to the upper layer, subsequent operations can be performed.

[0539] The above PPDU can be based on Figure 1 device to send.

[0540] like Figure 1 As shown in , the receiving device may include a memory 112 , a processor 111 and a transceiver 113 .

[0541] The transceiver 123 may receive the PPDU based on the control of the processor 121. For example, the transceiver 123 may include a plurality of subunits (not shown). For example, the transceiver 123 may include at least one receiving antenna and a filter for the corresponding receiving antenna.

[0542] The PPDU received by the transceiver 123 may be stored in the memory 122. The processor 121 may process decoding of the PPDU received by the memory 122. The processor 121 may obtain control information (eg, EHT-SIG) about the tone plan / RU included in the PPDU and store the obtained control information in the memory 122.

[0543] Processor 121 may decode the received PPDU. Specifically, it may perform operations for recovering the results of the CSD, spatial mapping, IDFT / IFFT operations, and GI insertion applied to the PPDU. The CSD, spatial mapping, IDFT / IFFT operations, and recovery of the GI insertion results may be performed by multiple processing units (not shown) independently implemented in processor 121.

[0544] In addition, the processor 121 may decode a data field of the PPDU received through the transceiver 123 .

[0545] In addition, the processor 121 may process the decoded data. For example, the processor 121 may perform a processing operation to transmit information about the decoded data field to an upper layer (e.g., a MAC layer). In addition, when the generation of a signal is instructed from the upper layer to the PHY layer in response to the data transmitted to the upper layer, subsequent operations may be performed.

[0546] In the following, reference will be made to Figures 1 to 33 The aforementioned embodiments are described.

[0547] Figure 34 : is a flowchart illustrating a process in which a transmitting STA transmits a PPDU according to this embodiment.

[0548] Can be performed in a network environment supporting the next generation wireless LAN system (e.g., IEEE 802.11be or EHT wireless LAN system) Figure 34 The next-generation wireless LAN system is an improved wireless LAN system from the 802.11ax system and can meet backward compatibility with the 802.11ax system.

[0549] Figure 34 The example is performed by a transmitting STA, and the transmitting STA may correspond to an access point (AP). Figure 34 The receiving STA may correspond to a STA supporting an extremely high throughput (EHT) WLAN system.

[0550] This embodiment provides a method and apparatus for transmitting and receiving PPDUs based on multiple RUs configured by combining large RUs. In this context, a large RU refers to a resource unit with more than 242 tones. Specifically, this embodiment provides a method for configuring multiple RUs for transmitting PPDUs using a non-OFDMA scheme.

[0551] In step S3410, the transmitting station (STA) generates a physical protocol data unit (PPDU).

[0552] In step S3420, the transmitting STA sends the PPDU to the receiving STA via broadband.

[0553] The PPDU includes a control field and a data field.

[0554] When the broadband is a 320 / 160+160 MHz band including first to fourth 80 MHz sub-channels, the first 80 MHz sub-channel includes a first 996 resource units (RUs), and the second 80 MHz sub-channel includes a second 996 RUs, the third 80 MHz sub-channel includes a third 996 RUs, and the fourth 80 MHz sub-channel includes a first 484 RUs.

[0555] The data field is received via a first plurality of RUs in which the first through third 996RUs and the first 484RU are aggregated. That is, the data field can be received via a plurality of RUs in which three 996RUs and one 484RU are aggregated. As described above, the broadband may include four 80MHz subchannels. Three 996RUs and one 484RU may be allocated to each of the four 80MHz subchannels. In this case, the first through third 996RUs may be RUs consisting of 996 tones, and the first 484RU may be RUs consisting of 484 tones.

[0556] The PPDU may be transmitted based on a non-orthogonal frequency division multiple access (OFDMA) scheme.

[0557] The first plurality of RUs can be obtained by puncturing the 484RUs in the fourth 80MHz sub-channel. In this case, since only the first 484RUs are used in the fourth 80MHz sub-channel, it can be seen that the remaining 484RUs (or a continuous 40MHz frequency band) are punctured.

[0558] The control field may include allocation information about the first plurality of RUs. The receiving STA can decode the allocation information about the first plurality of RUs and confirm that the first plurality of RUs are RUs allocated to itself.

[0559] One of the first to fourth 80 MHz sub-channels may be a primary 80 MHz channel, and the remaining three sub-channels other than the primary 80 MHz channel may be secondary 80 MHz channels (specifically, a secondary 80 MHz channel, a secondary 160 MHz lower 80 MHz channel, and a secondary 160 MHz upper 80 MHz channel). The primary 80 MHz channel and the secondary 80 MHz channel may be configured regardless of frequency. Here, the primary 80 MHz channel may include a primary 20 MHz channel, a secondary 20 MHz channel, and a secondary 40 MHz channel. The primary 20 MHz channel is not (always) punctured.

[0560] As another example, when the broadband is a 320 / 160+160 MHz band including the fifth to eighth 80 MHz subchannels, the fifth 80 MHz subchannel may include a fourth 996 RU, the sixth 80 MHz subchannel may include a fifth 996 RU, and the seventh 80 MHz subchannel may include a sixth 996 RU.

[0561] The data field can be received via a second plurality of RUs in which the fourth through sixth 996 RUs are aggregated. That is, the data field can be received via a plurality of RUs in which three 996 RUs are aggregated. As described above, the broadband may include four 80 MHz subchannels. Three 996 RUs can be allocated to each of the remaining three 80 MHz subchannels, excluding one punctured 80 MHz subchannel. In this case, the fourth through sixth 996 RUs may be RUs consisting of 996 tones.

[0562] The second plurality of RUs is obtained by puncturing the eighth 80 MHz sub-channel. This indicates that the eighth 80 MHz sub-channel is punctured because the eighth 80 MHz sub-channel is not used when transmitting the data field.

[0563] The control field may include allocation information about the second plurality of RUs. The receiving STA may decode the allocation information about the second plurality of RUs and confirm that the second plurality of RUs are RUs allocated to itself.

[0564] One of the fifth to eighth 80 MHz sub-channels may be a primary 80 MHz channel, and the remaining three sub-channels other than the primary 80 MHz channel may be secondary 80 MHz channels (specifically, a secondary 80 MHz channel, a lower 80 MHz channel of the secondary 160 MHz, and an upper 80 MHz channel of the secondary 160 MHz). The primary 80 MHz channel and the secondary 80 MHz channel may be configured regardless of frequency. Here, the primary 80 MHz channel is not (always) punctured.

[0565] As another example, when the broadband is a 320 / 160+160 MHz band including the fifth to eighth 80 MHz subchannels, the fifth 80 MHz subchannel may include a fourth 996 RU, the sixth 80 MHz subchannel may include a fifth 996 RU, and the seventh 80 MHz subchannel may include a second 484 RU.

[0566] The data field can be received via a third plurality of RUs in which the fourth to fifth 996RUs and the second 484RU are aggregated. That is, the data field can be received via a plurality of RUs in which two 996RUs and one 484RU are aggregated. As described above, the broadband may include four 80MHz subchannels. Two 996RUs and one 484RU may be allocated to each of the other three 80MHz subchannels, excluding the one perforated 80MHz subchannel. In this case, the fourth to fifth 996RUs may be RUs consisting of 996 tones, while the second 484RU may be RUs consisting of 484 tones.

[0567] The third plurality of RUs can be obtained by puncturing 484 RUs in the seventh 80 MHz subchannel and puncturing the eighth 80 MHz subchannel. This is because the eighth 80 MHz subchannel is not used when transmitting the data field, so it can be seen that the eighth 80 MHz subchannel is punctured, and only the second 484 RU is used in the seventh 80 MHz subchannel, so it can be seen that the remaining 484 RUs (or a continuous 40 MHz frequency band) are punctured.

[0568] The control field may include allocation information about the third plurality of RUs. The receiving STA may decode the allocation information about the third plurality of RUs and confirm that the second plurality of RUs are RUs allocated to itself.

[0569] One of the fifth to eighth 80 MHz sub-channels may be a primary 80 MHz channel, and the remaining three sub-channels other than the primary 80 MHz channel may be secondary 80 MHz channels (specifically, a secondary 80 MHz channel, a lower 80 MHz channel of the secondary 160 MHz, and an upper 80 MHz channel of the secondary 160 MHz). The primary 80 MHz channel and the secondary 80 MHz channel may be configured regardless of frequency. Here, the primary 80 MHz channel may include a primary 40 MHz channel and a secondary 40 MHz channel. The primary 40 MHz channel or the primary 80 MHz channel is not punctured.

[0570] This embodiment proposes a method for configuring multiple RUs (large RU combination) for transmitting PPDUs in a 320 / 160+160 MHz frequency band in a non-OFDMA scheme.

[0571] In addition, this embodiment may provide a method for configuring multiple RUs (large RU combination) for sending PPDUs in a non-OFDMA scheme in the 80MHz band. In this case, the 80MHz band may include the first to second 20MHz subchannels and the first 40MHz subchannel. One of the first and second 20MHz subchannels may include 242 RUs, and the first 40MHz subchannel may include 484RUs. The data field may be received through multiple RUs in which the 242RUs and 484RUs are aggregated. Multiple RUs may be obtained by puncturing one of the first and second 20MHz subchannels.

[0572] Furthermore, this embodiment may propose a method of configuring multiple RUs (large RU combination) for transmitting PPDUs in a 160 / 80+80 MHz frequency band in a non-OFDMA scheme.

[0573] First, the 160 / 80+80 MHz frequency band may include first and second 40 MHz sub-channels and a first 80 MHz sub-channel. One of the first and second 40 MHz sub-channels may include a 484 RU, and the first 80 MHz sub-channel may include a 996 RU. The data field may be received using multiple RUs that aggregate the 484 RUs and the 996 RUs. Multiple RUs may be obtained by puncturing one of the first and second 40 MHz sub-channels.

[0574] Furthermore, the 160 / 80+80 MHz frequency band may include first and second 20 MHz sub-channels, a first 40 MHz sub-channel, and a first 80 MHz sub-channel. One of the first and second 20 MHz sub-channels may include a 242 RU, the first 40 MHz sub-channel may include a 484 RU, and the first 80 MHz sub-channel may include a 996 RU. The data field may be received via multiple RUs in which the 242 RUs, 484 RUs, and 996 RUs are aggregated. The multiple RUs may be obtained by puncturing one of the first and second 20 MHz sub-channels.

[0575] The control field includes a first control field supporting a conventional wireless LAN system and a second control field supporting an 802.11be wireless LAN system. The second control field may include a universal signal (U-SIG) or an extremely high throughput signal (EHT-SIG). The second control field may include allocation information regarding the RU to which the data field is to be transmitted. This embodiment describes a case where the RU to which the data field is to be transmitted is a multi-RU in which multiple RUs are aggregated. An RU refers to a resource unit in which the data field is transmitted.

[0576] The EHT-SIG may include EHT-SIG-A and EHT-SIG-B (or EHT-SIG-C fields). The EHT-SIG-B may include resource unit (RU) information. The transmitting STA may notify information about the wideband tone plan through the EHT-SIG-B. In addition, the EHT-STF, EHT-LTF, and the data field included in the second control field may be transmitted / received by multiple RUs included in the wideband tone plan.

[0577] Figure 35 is a flowchart illustrating a process in which a receiving STA receives a PPDU according to the present embodiment.

[0578] Figure 35 The example can be performed in a network environment supporting a next-generation wireless LAN system (e.g., IEEE 802.11be or EHT wireless LAN system). The next-generation wireless LAN system is a wireless LAN system improved from the 802.11ax system and can meet backward compatibility with the 802.11ax system.

[0579] Figure 35 The example is performed by a transmitting STA, and the transmitting STA may correspond to an access point (AP). Figure 35 The receiving STA may correspond to a STA supporting an extremely high throughput (EHT) WLAN system.

[0580] This embodiment provides a method and apparatus for transmitting and receiving a PPDU based on multiple RUs configured by combining large RUs. In this context, a large RU refers to a resource unit with more than 242 tones. Specifically, this embodiment provides a method for configuring multiple RUs for transmitting a PPDU using a non-OFDMA scheme.

[0581] In step S3510, a receiving station (STA) receives a physical protocol data unit (PPDU) from a transmitting STA through a broadband.

[0582] In step S3520, the receiving STA decodes the PPDU.

[0583] The PPDU includes a control field and a data field.

[0584] When the broadband is a 320 / 160+160 MHz band including first to fourth 80 MHz sub-channels, the first 80 MHz sub-channel includes a first 996 resource units (RUs), and the second 80 MHz sub-channel includes a second 996 RUs, the third 80 MHz sub-channel includes a third 996 RUs, and the fourth 80 MHz sub-channel includes a first 484 RUs.

[0585] The data field is received via a first plurality of RUs in which the first through third 996RUs and the first 484RU are aggregated. That is, the data field can be received via a plurality of RUs in which three 996RUs and one 484RU are aggregated. As described above, the broadband may include four 80MHz subchannels. Three 996RUs and one 484RU may be allocated to each of the four 80MHz subchannels. In this case, the first through third 996RUs may be RUs consisting of 996 tones, while the first 484RU may be RUs consisting of 484 tones.

[0586] The PPDU may be transmitted based on a non-orthogonal frequency division multiple access (OFDMA) scheme.

[0587] The first plurality of RUs can be obtained by puncturing the 484RUs in the fourth 80 MHz sub-channel. In this case, since only the first 484RUs are used in the fourth 80 MHz sub-channel, it can be seen that the remaining 484RUs (or a continuous 40 MHz frequency band) are punctured.

[0588] The control field may include allocation information about the first plurality of RUs. The receiving STA can decode the allocation information of the first plurality of RUs and confirm that the first plurality of RUs are RUs allocated to itself.

[0589] One of the first to fourth 80 MHz sub-channels may be a primary 80 MHz channel, and the remaining three sub-channels other than the primary 80 MHz channel may be secondary 80 MHz channels (specifically, a secondary 80 MHz channel, a secondary 160 MHz lower 80 MHz channel, and a secondary 160 MHz upper 80 MHz channel). The primary 80 MHz channel and the secondary 80 MHz channel may be configured regardless of frequency. Here, the primary 80 MHz channel may include a primary 20 MHz channel, a secondary 20 MHz channel, and a secondary 40 MHz channel. The primary 20 MHz channel is not (always) punctured.

[0590] As another example, when the broadband is a 320 / 160+160 MHz band including the fifth to eighth 80 MHz subchannels, the fifth 80 MHz subchannel may include a fourth 996 RU, the sixth 80 MHz subchannel may include a fifth 996 RU, and the seventh 80 MHz subchannel may include a sixth 996 RU.

[0591] The data field can be received via a second plurality of RUs in which the fourth through sixth 996 RUs are aggregated. That is, the data field can be received via a plurality of RUs in which three 996 RUs are aggregated. As described above, the broadband may include four 80 MHz subchannels. Three 996 RUs can be allocated to each of the remaining three 80 MHz subchannels, excluding one punctured 80 MHz subchannel. In this case, the fourth through sixth 996 RUs may be RUs consisting of 996 tones.

[0592] The second plurality of RUs is obtained by puncturing the eighth 80 MHz sub-channel. This indicates that the eighth 80 MHz sub-channel is punctured because the eighth 80 MHz sub-channel is not used when transmitting the data field.

[0593] The control field may include allocation information about the second plurality of RUs. The receiving STA may decode the allocation information about the second plurality of RUs and confirm that the second plurality of RUs are RUs allocated to itself.

[0594] One of the fifth to eighth 80 MHz sub-channels may be a primary 80 MHz channel, and the remaining three sub-channels other than the primary 80 MHz channel may be secondary 80 MHz channels (specifically, a secondary 80 MHz channel, a lower 80 MHz channel of the secondary 160 MHz, and an upper 80 MHz channel of the secondary 160 MHz). The primary 80 MHz channel and the secondary 80 MHz channel may be configured regardless of frequency. Here, the primary 80 MHz channel is not (always) punctured.

[0595] As another example, when the broadband is a 320 / 160+160 MHz band including the fifth to eighth 80 MHz subchannels, the fifth 80 MHz subchannel may include a fourth 996 RU, the sixth 80 MHz subchannel may include a fifth 996 RU, and the seventh 80 MHz subchannel may include a second 484 RU.

[0596] The data field can be received via a third plurality of RUs in which the fourth to fifth 996RUs and the second 484RU are aggregated. That is, the data field can be received via a plurality of RUs in which two 996RUs and one 484RU are aggregated. As described above, the broadband may include four 80MHz subchannels. Two 996RUs and one 484RU may be allocated to each of the other three 80MHz subchannels, excluding the one perforated 80MHz subchannel. In this case, the fourth to fifth 996RUs may be RUs consisting of 996 tones, and the second 484RU may be RUs consisting of 484 tones.

[0597] The third plurality of RUs can be obtained by puncturing 484 RUs in the seventh 80 MHz subchannel and puncturing the eighth 80 MHz subchannel. This is because the eighth 80 MHz subchannel is not used when transmitting the data field, so it can be seen that the eighth 80 MHz subchannel is punctured, and only the second 484 RU is used in the seventh 80 MHz subchannel, so it can be seen that the remaining 484 RUs (or a continuous 40 MHz frequency band) are punctured.

[0598] The control field may include allocation information about the third plurality of RUs. The receiving STA may decode the allocation information of the third plurality of RUs and confirm that the second plurality of RUs are the RUs allocated to itself.

[0599] One of the fifth to eighth 80 MHz sub-channels may be a primary 80 MHz channel, and the remaining three sub-channels other than the primary 80 MHz channel may be secondary 80 MHz channels (specifically, a secondary 80 MHz channel, a lower 80 MHz channel of the secondary 160 MHz, and an upper 80 MHz channel of the secondary 160 MHz). The primary 80 MHz channel and the secondary 80 MHz channel may be configured regardless of frequency. Here, the primary 80 MHz channel may include a primary 40 MHz channel and a secondary 40 MHz channel. The primary 40 MHz channel or the primary 80 MHz channel is not punctured.

[0600] This embodiment proposes a method of configuring multiple RUs (large RU grouping) for transmitting PPDUs in a non-OFDMA scheme in a 320 / 160+160 MHz frequency band.

[0601] In addition, this embodiment may provide a method for configuring multiple RUs (large RU combination) for sending PPDUs in a non-OFDMA scheme in the 80MHz band. In this case, the 80MHz band may include the first to second 20MHz subchannels and the first 40MHz subchannel. One of the first and second 20MHz subchannels may include 242 RUs, and the first 40MHz subchannel may include 484RUs. The data field may be received by multiple RUs in which the 242RUs and 484RUs are aggregated. Multiple RUs may be obtained by puncturing one of the first and second 20MHz subchannels.

[0602] Furthermore, this embodiment may propose a method of configuring multiple RUs (large RU combination) for transmitting PPDUs in a 160 / 80+80 MHz frequency band in a non-OFDMA scheme.

[0603] First, the 160 / 80+80 MHz frequency band may include first and second 40 MHz sub-channels and a first 80 MHz sub-channel. One of the first and second 40 MHz sub-channels may include a 484 RU, and the first 80 MHz sub-channel may include a 996 RU. The data field may be received by aggregating multiple RUs of the 484 RU and the 996 RU. Multiple RUs may be obtained by puncturing one of the first and second 40 MHz sub-channels.

[0604] Furthermore, the 160 / 80+80 MHz frequency band may include first and second 20 MHz sub-channels, a first 40 MHz sub-channel, and a first 80 MHz sub-channel. One of the first and second 20 MHz sub-channels may include a 242 RU, the first 40 MHz sub-channel may include a 484 RU, and the first 80 MHz sub-channel may include a 996 RU. The data field may be received via multiple RUs in which the 242 RUs, 484 RUs, and 996 RUs are aggregated. The multiple RUs may be obtained by puncturing one of the first and second 20 MHz sub-channels.

[0605] The control field includes a first control field supporting a conventional wireless LAN system and a second control field supporting an 802.11be wireless LAN system. The second control field may include a universal signal (U-SIG) or an extremely high throughput signal (EHT-SIG). The second control field may include allocation information regarding the RU to which the data field will be sent. This embodiment describes a case where the RU to which the data field is sent is a multi-RU in which multiple RUs are aggregated. An RU refers to a resource unit in which the data field is sent.

[0606] The EHT-SIG may include EHT-SIG-A and EHT-SIG-B (or EHT-SIG-C fields). The EHT-SIG-B may include resource unit (RU) information. The transmitting STA may notify information about the wideband tone plan through the EHT-SIG-B. In addition, the EHT-STF, EHT-LTF, and the data field included in the second control field may be transmitted / received by multiple RUs included in the wideband tone plan.

[0607] 5. Device / equipment configuration

[0608] The technical features of the present specification can be applied to various devices and methods. Figure 1 and / or Figure 19 For example, the technical features of the above-mentioned specification can only be applied to Figure 1 and / or Figure 19 For example, the above technical features of this specification are based on Figure 1 The processing chips 114 and 124 are implemented, or based on Figure 1 The processors 111 and 121 and the memories 112 and 122 can be implemented, or can be based on Figure 19 The processor 610 and the memory 620 of the present disclosure are implemented. For example, the apparatus of the present disclosure may receive a physical protocol data unit (PPDU) from a transmitting STA via a broadband and decode the PPDU.

[0609] The technical features of this specification can be implemented based on a computer-readable medium (CRM). For example, the CRM proposed in this specification is at least one computer-readable medium, including at least one computer-readable medium, which includes instructions executed by at least one processor.

[0610] The CRM may store instructions for performing operations including: receiving a physical protocol data unit (PPDU) from a transmitting STA via broadband; and decoding the PPDU. The instructions stored in the CRM of this specification may be executed by at least one processor. The at least one processor associated with the CRM of this specification may be Figure 1 Processors 111 and 121 or processing chips 114 and 124, or Figure 19 The processor 610 of this specification can be Figure 1 memories 112 and 122, Figure 19 memory 620, or a separate external memory / storage medium / disk.

[0611] The aforementioned technical features of this specification are applicable to various applications or business models. For example, the aforementioned technical features can be applied to wireless communications of devices that support artificial intelligence (AI).

[0612] Artificial intelligence refers to the field of study concerning artificial intelligence or the methods used to create it, while machine learning refers to the field of study concerning methods for defining and solving various problems in the field of artificial intelligence. Machine learning is also defined as an algorithm that improves operational performance through consistent operational experience.

[0613] An artificial neural network (ANN) is a model used in machine learning and can refer to an overall problem-solving model that includes artificial neurons (nodes) that form a network by combining synapses. An ANN can be defined by the connection pattern between neurons in different layers, the learning process that updates the model parameters, and the activation function that generates the output value.

[0614] An artificial neural network may include an input layer, an output layer, and optionally one or more hidden layers. Each layer includes one or more neurons, and the artificial neural network may include synapses connecting the neurons. In an artificial neural network, each neuron may output a function value of an activation function of an input signal input through a synapse, a weight, and a bias.

[0615] Model parameters are parameters determined by learning and include the weights of synaptic connections and the biases of neurons. Hyperparameters are parameters that are set before learning in a machine learning algorithm and include the learning rate, number of iterations, mini-batch size, and initialization function.

[0616] Learning an artificial neural network may aim to determine the model parameters that minimize a loss function. The loss function can be used as a metric to determine the optimal model parameters in the process of learning an artificial neural network.

[0617] Machine learning can be divided into supervised learning, unsupervised learning, and reinforcement learning.

[0618] Supervised learning refers to a method of training an artificial neural network using labels given to training data, wherein when the training data is input to the artificial neural network, the labels can indicate the correct answer (or result value) that the artificial neural network needs to infer. Unsupervised learning can refer to a method of training an artificial neural network without labels given to the training data. Reinforcement learning can refer to a training method for training an agent defined in an environment to select actions or action sequences to maximize the cumulative reward in each state.

[0619] Machine learning implemented using a deep neural network (DNN) including multiple hidden layers among artificial neural networks is called deep learning, and deep learning is a part of machine learning. In the following, machine learning is explained as including deep learning.

[0620] The aforementioned technical features can be applied to wireless communication of robots.

[0621] A robot can refer to a machine that uses its own capabilities to automatically process or operate a given task. In particular, a robot that has the function of recognizing the environment and making judgments autonomously to perform operations can be called an intelligent robot.

[0622] Depending on their application or field, robots can be categorized as industrial, medical, household, or military robots. Robots can include actuators or motors to perform various physical operations, such as moving robot joints. Additionally, mobile robots can include wheels, brakes, propellers, and other components in their actuators to enable them to travel on the ground or fly through the air.

[0623] The aforementioned technical features can be applied to devices that support extended reality.

[0624] Extended reality is collectively referred to as virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology is a computer graphics technology that presents real-world objects and backgrounds solely within CG images, AR technology is a computer graphics technology that presents virtual CG images over images of real objects, and MR technology is a computer graphics technology that presents virtual objects mixed and combined with the real world.

[0625] MR technology is similar to AR technology in that it can display real objects and virtual objects together. However, in AR technology, virtual objects are used to supplement real objects, while in MR technology, virtual objects and real objects are used as equal.

[0626] XR technology can be applied to head-mounted displays (HMDs), head-up displays (HUDs), mobile phones, tablets, laptops, desktop computers, televisions, digital signage, etc. Devices that apply XR technology can be called XR devices.

[0627] The claims disclosed in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented as a device, and the technical features in the device claims of this specification can be combined to be implemented by a method. In addition, the technical features in the method claims and device claims of this specification can be combined to be implemented as a device, and the technical features in the method claims and device claims of this specification can be combined to be implemented by a method.

Claims

1. A method in a wireless local area network (LAN) system, the method comprising: Receiving, by a receiving station (STA), a physical protocol data unit (PPDU) including a control field and a data field from a transmitting STA; as well as Obtaining the control field by the receiving STA; as well as decoding the data field by the receiving STA based on the control field, The bandwidth of the PPDU is 320 MHz, which includes a primary 80 MHz channel, a secondary 80 MHz channel, and a secondary 160 MHz channel. The primary 80 MHz channel includes an unpunctured primary 20 MHz channel. wherein the data field is received via a 3x996+484 tone multiple resource unit (MRU), wherein, when a 40 MHz subchannel is punctured in the bandwidth of the PPDU, the 3x996+484 tone MRU is allocated, wherein the 3x996+484-tone MRU is obtained based on a combination of three 996-tone RUs and a 484-tone RU, and The PPDU is received based on a non-orthogonal frequency division multiple access (non-OFDMA) scheme.

2. The method according to claim 1, wherein The PPDU further includes a control field, wherein the control field includes allocation information about the 3x996+484 tone MRU, The 996-tone RU is an RU consisting of 996 tones. The 484-tone RU is an RU consisting of 484 tones.

3. The method according to claim 1, wherein In addition to the 3x996+484 tone MRU, the control field further includes allocation information about the 3x996 tone MRU, wherein the 3x996 tone MRU is allowed when puncturing 80 MHz subchannels in the bandwidth of the PPDU, and The 3x996-tone MRU is obtained by combining three 996-tone RUs.

4. The method according to claim 1, wherein The primary 80 MHz channel is not punctured.

5. The method according to claim 1, wherein In addition to the 3x996+484 tone MRU, the control field further includes allocation information about the 2x996+484 tone MRU; wherein the 2x996+484 tone MRU is allowed when 40 MHz subchannels and 80 MHz subchannels are punctured in the bandwidth of the PPDU, and The 2x996+484-tone MRU is obtained by combining two 996-tone RUs and a 484-tone RU.

6. The method according to claim 5, wherein: The primary 80MHz channel includes a primary 40MHz channel and a secondary 40MHz channel. The main 40 MHz channel or the main 80 MHz channel is not punctured.

7. A receiving station (STA) in a wireless local area network (LAN), the receiving STA comprising: Memory; transceiver; as well as a processor operatively coupled to the memory and the transceiver, Wherein, the processor is configured to: Receive a physical protocol data unit (PPDU) including a control field and a data field from a transmitting STA; obtaining the control field; and decoding the data field based on the control field, The bandwidth of the PPDU is 320 MHz, which includes a primary 80 MHz channel, a secondary 80 MHz channel, and a secondary 160 MHz channel. The primary 80 MHz channel includes an unpunctured primary 20 MHz channel. wherein the data field is received via a 3x996+484 tone multiple resource unit (MRU), wherein, when a 40 MHz subchannel is punctured in the bandwidth of the PPDU, the 3x996+484 tone MRU is allocated, wherein the 3x996+484-tone MRU is obtained based on a combination of three 996-tone RUs and a 484-tone RU, and The PPDU is received based on a non-orthogonal frequency division multiple access (non-OFDMA) scheme.

8. A method in a wireless local area network (LAN), the method comprising: The control field is configured by the sending station (STA); configuring, by the transmitting STA, a physical protocol data unit (PPDU) based on the control field; as well as The transmitting STA sends the PPDU including the data field to the receiving STA, The bandwidth of the PPDU is 320 MHz, which includes a primary 80 MHz channel, a secondary 80 MHz channel, and a secondary 160 MHz channel. The primary 80 MHz channel includes an unpunctured primary 20 MHz channel. wherein the data field is received via a 3x996+484 tone multiple resource unit (MRU), wherein, when a 40 MHz subchannel is punctured in the bandwidth of the PPDU, the 3x996+484 tone MRU is allocated, wherein the 3x996+484-tone MRU is obtained based on a combination of three 996-tone RUs and a 484-tone RU, and The PPDU is received based on a non-orthogonal frequency division multiple access (non-OFDMA) scheme.

9. The method according to claim 8, wherein The PPDU further includes a control field, wherein the control field includes allocation information about the 3x996+484 tone MRU, The 996-tone RU is an RU consisting of 996 tones. The 484-tone RU is an RU consisting of 484 tones.

10. The method according to claim 8, wherein In addition to the 3x996+484 tone MRU, the control field further includes allocation information about the 3x996 tone MRU, wherein the 3x996 tone MRU is allowed when puncturing 80 MHz subchannels in the bandwidth of the PPDU, and The 3x996-tone MRU is obtained by combining three 996-tone RUs.

11. The method according to claim 8, wherein The primary 80 MHz channel is not punctured.

12. The method according to claim 8, wherein In addition to the 3x996+484 tone MRU, the control field further includes allocation information about the 2x996+484 tone MRU; wherein the 2x996+484 tone MRU is allowed when 40 MHz subchannels and 80 MHz subchannels are punctured in the bandwidth of the PPDU, and The 2x996+484-tone MRU is obtained by combining two 996-tone RUs and a 484-tone RU.

13. The method according to claim 12, wherein: The primary 80MHz channel includes a primary 40MHz channel and a secondary 40MHz channel. The main 40 MHz channel or the main 80 MHz channel is not punctured.

14. A transmitting station (STA) in a wireless local area network (LAN), the transmitting STA comprising: Memory; transceiver; as well as a processor operatively coupled to the memory and the transceiver, Wherein, the processor is configured to: Configuration control fields; Configure a physical protocol data unit (PPDU) based on the control field; and sending the PPDU including the data field to a receiving STA, The bandwidth of the PPDU is 320 MHz, which includes a primary 80 MHz channel, a secondary 80 MHz channel, and a secondary 160 MHz channel. The primary 80 MHz channel includes an unpunctured primary 20 MHz channel. wherein the data field is sent via a 3x996+484 tone multi-resource unit (MRU), wherein, when a 40 MHz subchannel is punctured in the bandwidth of the PPDU, the 3x996+484 tone MRU is allocated, wherein the 3x996+484-tone MRU is obtained based on a combination of three 996-tone RUs and a 484-tone RU, and The PPDU is received based on a non-orthogonal frequency division multiple access (non-OFDMA) scheme.

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