Techniques for configuring preamble in wireless communication system

Abstract

The present disclosure relates to a technique for configuring a preamble in a wireless communication system. According to various embodiments, a receiving STA may receive a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field. The PPDU may be configured to be transmitted to a single user. The second signal field may be composed of one content channel that can be repeated within the first bandwidth in units of the second bandwidth.

Description

[0001] This application is a divisional application of a patent application with application number 202180031293.8 (PCT / KR2021 / 003103), which was submitted to the China Patent Office on October 27, 2022, with an international application date of March 12, 2021, and the invention name is "Technology for configuring preamble in wireless communication system". Technical Field

[0002] The present specification relates to a technology for configuring a preamble in a wireless LAN system, and more particularly to a method for configuring a signal field in a preamble in a wireless LAN system and a device supporting the method. Background Art

[0003] Wireless network technology may include various types of wireless local area networks (WLANs). WLANs use widely used networking protocols and can be used to interconnect nearby devices. The various technical features described herein can be applied to any communication standard such as WiFi, or more generally, any one of the IEEE 802.11 series of wireless protocols. Wireless local area networks (WLANs) have been enhanced in various ways. For example, the IEEE 802.11ax standard proposes an enhanced communication environment using orthogonal frequency division multiple access (OFDMA) and downlink multi-user multiple input multiple output (DL MU MIMO) schemes.

[0004] This specification proposes technical features that can be used 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 sequence, hybrid automatic repeat request (HARQ) scheme, etc. The EHT standard may be referred to as the IEEE 802.11be standard. Summary of the invention

[0005] Technical Solution

[0006] In the EHT standard, wide bandwidth (eg, 160 / 320 MHz), 16 streams, and / or multi-link (or multi-band) operations may be used to support high throughput and high data rates.

[0007] In the EHT standard, wide bandwidth (ie, 160 / 240 / 320 MHz) can be used for high throughput. In addition, in order to efficiently use the bandwidth, preamble puncturing and multiple RU transmission can be used.

[0008] When the EHT PPDU is transmitted using a wide bandwidth (ie, 160 / 240 / 320 MHz), an EHT SIG transmission method in consideration of preamble puncturing / multiple RU allocation, etc. and a BCC interleaver configuration therefor may be proposed.

[0009] According to various embodiments, a receiving station (STA) may perform operations including: receiving a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field, wherein the PPDU is transmitted to a single user, wherein the PPDU is received based on a first bandwidth, wherein the second signal field is configured as one content channel, wherein one content channel is configured by repeating in units of the second bandwidth within the first bandwidth; and decoding the PPDU based on the first signal field and the second signal field.

[0010] Technical Effects

[0011] According to various embodiments, preamble puncturing and multiple RUs may be used, thereby having an effect of efficiently utilizing bandwidth.

[0012] According to various embodiments, the signal field (e.g., EHT-SIG) of the EHT PPDU can be transmitted by repetition in units of a specific bandwidth. Therefore, it has the following effect: even if only a specific bandwidth is checked, the receiving STA can check the information included in the signal field without checking the signal field of the entire bandwidth of the EHT PPDU.

[0013] According to the embodiment, the interleaver defined in the conventional standard can be reused, thereby having the effect of not requiring replacement of additional hardware. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An example of a transmitting device and / or a receiving device of the present specification is shown.

[0015] Figure 2 is a conceptual diagram showing the structure of a wireless local area network (WLAN).

[0016] Figure 3 Shows the general link establishment process.

[0017] Figure 4 An example of PPDU used in the IEEE standard is shown.

[0018] Figure 5 The layout of resource units (RUs) used in a frequency band of 20 MHz is shown.

[0019] Figure 6 The layout of RUs used in a frequency band of 40 MHz is shown.

[0020] Figure 7 The layout of RUs used in the 80 MHz frequency band is shown.

[0021] Figure 8 The structure of the HE-SIG-B field is shown.

[0022] Fig. 9 An example is shown in which multiple user STAs are assigned to the same RU through the MU-MIMO scheme.

[0023] Fig.10 The operation based on UL-MU is shown.

[0024] Fig.11 An example of a trigger frame is shown.

[0025] Fig.12 An example of a common information field of a trigger frame is shown.

[0026] Fig.13 An example of subfields included in the per-user information field is shown.

[0027] Fig.14 The technical features of the UORA scheme are described.

[0028] Fig.15 An example of channels used / supported / defined within the 2.4 GHz band is shown.

[0029] Fig.16 An example of channels used / supported / defined within the 5 GHz band is shown.

[0030] Fig.17 An example of channels used / supported / defined within the 6 GHz band is shown.

[0031] Fig.18 An example of PPDU used in this specification is shown.

[0032] Fig.19 An example of a modified transmitting device and / or receiving device of the present specification is shown.

[0033] Fig. 20 An example of HE-PPDU is shown.

[0034] Fig.21 An example of aggregation of RU26 and RU52 in 20 MHz is shown.

[0035] Fig. 22 An example of aggregation of RU26 and RU52 in 40 MHz is shown.

[0036] Fig.23 An example of aggregation of RU26 and RU52 in 80 MHz is shown.

[0037] Fig.24 An example of an EHT PPDU is shown.

[0038] Fig.25 An example of U-SIG is shown.

[0039] Fig.26 An example of EHT-SIG for 80 MHz is shown.

[0040] Fig. 27 Another example of EHT-SIG for 80 MHz is shown.

[0041] Fig.28 Another example of EHT-SIG for 80 MHz is shown.

[0042] Fig.29 An example of the EHT-SIG for 160 MHz is shown.

[0043] Fig.30 An example of EHT-SIG for 240 MHz is shown.

[0044] Fig.31 An example of EHT-SIG for 320 MHz is shown.

[0045] Fig.32 Another example of EHT-SIG for 80 MHz is shown.

[0046] Fig.33 Another example of EHT-SIG for 160 MHz is shown.

[0047] Fig.34 Another example of EHT-SIG for 240 MHz is shown.

[0048] Fig.35 Another example of EHT-SIG for 320 MHz is shown.

[0049] Fig.36 Another example of EHT-SIG for 320 MHz is shown.

[0050] Fig.37 Another example of EHT-SIG for 80 MHz is shown.

[0051] Fig.38 Another example of EHT-SIG for 160 MHz is shown.

[0052] Fig.39 Another example of EHT-SIG for 240 MHz is shown.

[0053] Fig.40Another example of EHT-SIG for 320 MHz is shown.

[0054] Fig.41 is a flowchart for explaining the operation of the receiving STA.

[0055] Fig.42 is a flowchart for explaining the operation of the transmitting STA. DETAILED DESCRIPTION

[0056] 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".

[0057] A slash ( / ) or a comma used in this specification may represent "and / or". For example, "A / B" may represent "A and / or B". Thus, "A / B" may represent "only A", "only B", or "both A and B". For example, "A, B, C" may represent "A, B, or C".

[0058] In the present specification, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present 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".

[0059] In addition, in the present 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".

[0060] In addition, the 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, the "control information" of this specification is not limited to "EHT-signal", and "EHT-signal" may be proposed as an example of "control information". In addition, when indicated as "control information (ie, EHT signal)", it may also mean that "EHT signal" is proposed as an example of "control information".

[0061] Technical features described separately in one drawing of the present specification may be implemented separately or simultaneously.

[0062] 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 IEEE802.11ax 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 the 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 mobile communication systems based on the evolution of LTE. In addition, the examples of this specification can be applied to communication systems based on the 5G NR standard of the 3GPP standard.

[0063] Hereinafter, in order to describe the technical features of the present specification, technical features applicable to the present specification will be described.

[0064] Figure 1 An example of a transmitting device and / or a receiving device of the present specification is shown.

[0065] exist Figure 1 In the example of , various technical features described below can be performed. Figure 1 At least one station (STA) is involved. For example, the STAs 110 and 120 of this specification may also be referred to as 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 of this specification may also be referred to as various terms such as networks, base stations, node Bs, access points (APs), repeaters, routers, repeaters, etc. The STAs 110 and 120 of this specification may also be referred to as various names such as receiving devices, transmitting devices, receiving STAs, transmitting STAs, receiving devices, transmitting devices, etc.

[0066] For example, the STAs 110 and 120 may function as an AP or a non-AP. That is, the STAs 110 and 120 of the present specification may function as an AP and / or a non-AP.

[0067] In addition to the IEEE 802.11 standard, the STAs 110 and 120 of the present specification may support various communication standards together. For example, communication standards based on 3GPP standards (e.g., LTE, LTE-A, 5G NR standards), etc. may be supported. In addition, the STAs of the present specification may be implemented as various devices such as mobile phones, vehicles, personal computers, etc. In addition, the STAs of the present specification may support communication for various communication services such as voice calls, video calls, data communications, and self-driving (autonomous driving).

[0068] The STAs 110 and 120 of the present specification may include a medium access control (MAC) conforming to the IEEE 802.11 standard and a physical layer interface for a radio medium.

[0069] The following will refer to Figure 1 Sub-figure (a) of FIG. 1 describes STAs 110 and 120 .

[0070] The first STA 110 may include a processor 111, a memory 112, and a transceiver 113. The processor, memory, and transceiver shown may be individually implemented as separate chips, or at least two blocks / functions may be implemented by a single chip.

[0071] The transceiver 113 of the first STA performs a signal transmission / reception operation. Specifically, it can transmit / receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be, etc.).

[0072] For example, the first STA 110 may perform operations expected by the AP. For example, the processor 111 of the AP may receive a signal through the transceiver 113, process a received (RX) signal, generate a transmitted (TX) signal, and provide control for signal transmission. The memory 112 of the AP may store a signal (e.g., an RX signal) received through the transceiver 113, and may store a signal (e.g., a TX signal) to be sent through the transceiver.

[0073] For example, the second STA 120 may perform operations expected by the non-AP STA. For example, the transceiver 123 of the non-AP performs signal transmission / reception operations. Specifically, IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be packets, etc.) may be transmitted / received.

[0074] 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.

[0075] For example, the operation of a device indicated as an AP in the specification described below 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 the relevant signal 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 TX / RX signal of the AP 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 the relevant signal 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 TX / RX signal of the AP may be stored in the memory 122 of the second STA 120.

[0076] For example, in the specification described below, the operation of the 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 the relevant signal 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 the relevant signal 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.

[0077] In the specification described below, 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) equipment, network, etc. may refer to Figure 1 For example, a device indicated as (transmitting / receiving) STA, a first STA, a second STA, STA1, STA2, AP, a first AP, a second AP, AP1, AP2, a (transmitting / receiving) terminal, a (transmitting / receiving) device, a (transmitting / receiving) apparatus, a network, etc. (but without a specific number) may refer to Figure 1 For example, in the following example, the operation of various STAs sending / receiving signals (eg, PPDU) may be performed in Figure 1 In addition, in the following examples, various STAs generate TX / RX signals or perform data processing and calculations in advance for TX / RX signals. Figure 1 111 and 121 of the processors. For example, examples of operations for generating TX / RX signals or performing data processing and calculation in advance may include: 1) operations for determining / obtaining / configuring / calculating / decoding / encoding bit information of subfields (SIG, STF, LTF, Data) included in the PPDU; 2) operations for determining / configuring / obtaining time resources or frequency resources (e.g., subcarrier resources) for subfields (SIG, STF, LTF, Data) included in the PPDU; 3) operations for determining / configuring / obtaining specific sequences (e.g., pilot sequences, STF / LTF sequences, additional sequences applied to SIG) for 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, etc. 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 the memories 112 and 122.

[0078] 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 the present specification.

[0079] For example, Figure 1 The transceivers 113 and 123 shown in the sub-diagram (b) of FIG. Figure 1 The same functions as the aforementioned transceiver shown in sub-figure (a) of FIG. Figure 1The 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 processors 111 and 121 and memories 112 and 122 have the same functions as those shown in sub-figure (a) above.

[0080] 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, repeater, receiving unit, sending unit, receiving STA, sending STA, receiving device, sending device, receiving apparatus and / or sending apparatus described below may mean Figure 1 STAs 110 and 120 shown in sub-figures (a) / (b) of Figure 1 The processing chips 114 and 124 shown in the sub-figure (b) of FIG. That is, the technical features of this specification can be Figure 1 The STA 110 and 120 shown in the sub-figure (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 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-figure (a) / (b) of FIG. Figure 1 The technical features of the control signals generated in the processors 111 and 121 illustrated in the sub-figures (a) / (b) of FIG. Alternatively, the technical features of the STA sending the control signal can be understood as Figure 1 The technical features of the processing chips 114 and 124 shown in the sub-figure (b) of FIG. 10 are for generating control signals to be transmitted to the transceivers 113 and 123 .

[0081] For example, the technical feature of receiving the control signal by the receiving STA can be understood as Figure 1 The technical feature of the transceivers 113 and 123 receiving the control signal shown in the sub-figure (a) of FIG. 1 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 1 The technical features of the control signal received by the transceivers 113 and 123 shown in the sub-figure (a) of FIG. Alternatively, the technical features of the receiving STA receiving the control signal can be understood as Figure 1The processing chips 114 and 124 shown in the sub-figure (b) of Figure 1 Technical characteristics of the control signals received in transceivers 113 and 123 shown in sub-figure (b).

[0082] Reference Figure 1 As shown in sub-figure (b), software codes 115 and 125 may be included in memories 112 and 122. Software codes 115 and 126 may include instructions for controlling operations of processors 111 and 121. Software codes 115 and 125 may be included as various programming languages.

[0083] Figure 1 The processors 111 and 121 or the processing chips 114 and 124 may include an application specific integrated circuit (ASIC), 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). Figure 1 The processors 111 and 121 or the processing chips 114 and 124 may be composed of The SNAPDRAGONTM processor series manufactured by EXYNOSTM processor series manufactured by Processor family manufactured by The HELIOTM processor series manufactured by The ATOMTM processor family manufactured by or enhanced from these processors.

[0084] In this specification, uplink may mean a link for communication from a non-AP STA to an SP STA, and an uplink PPDU / packet / signal, etc. may be transmitted through the uplink. In addition, in this specification, downlink may mean a link for communication from an AP STA to a non-AP STA, and a downlink PPDU / packet / signal, etc. may be transmitted through the downlink.

[0085] Figure 2 is a conceptual diagram showing the structure of a wireless local area network (WLAN).

[0086] Figure 2 The upper part of shows the structure of an infrastructure basic service set (BSS) of the Institute of Electrical and Electronics Engineers (IEEE) 802.11.

[0087] Reference Figure 2The 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 are successfully synchronized to communicate with each other, are not concepts indicating a specific area. BSS 205 may include one or more STAs 205-1 and 205-2 that may join one AP 230.

[0088] 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.

[0089] The distribution system 210 may implement an extended service set (ESS) 240 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 identification (SSID).

[0090] The portal 220 may serve as a bridge connecting a wireless LAN network (IEEE 802.11) and another network (eg, 802.X).

[0091] exist Figure 2 In the BSS shown in the upper part of FIG, a network between the APs 225 and 230 and a network between the APs 225 and 230 and the STAs 200-1, 205-1, and 205-2 can be implemented. However, a network is configured between the STAs to perform communication even without the APs 225 and 230. A network that performs communication by configuring a network between the STAs even without the APs 225 and 230 is defined as an ad hoc network or an independent basic service set (IBSS).

[0092] Figure 2 The lower part of FIG. 1 shows a conceptual diagram illustrating an IBSS.

[0093] Reference Figure 2 In the lower part, the IBSS is a BSS operating in a self-organizing mode. Since the IBSS does not include an access point (AP), there is no centralized management entity that performs management functions in the center. 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 may be composed of mobile STAs, and access to the DS is not allowed to form a self-contained network.

[0094] Figure 3A general link establishment process is shown.

[0095] In S310, the STA may perform a network discovery operation. The network discovery operation may include a scanning operation of the STA. That is, in order to access the network, the STA needs to discover participating networks. The STA needs to identify compatible networks before joining a wireless network, and the process of identifying a network present in a specific area is called scanning. Scanning methods include active scanning and passive scanning.

[0096] Figure 3 A network discovery operation including an active scanning process is shown. 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 the 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 a 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 the 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).

[0097] although Figure 3 Not 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 related to 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.

[0098] After discovering the network, the STA may perform an authentication process in S320. This authentication process may be referred to as a first authentication process to clearly distinguish it from the security establishment operation in the subsequent 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 frame used for the authentication request / response is a management frame.

[0099] The authentication frame may include information related to an authentication algorithm number, an authentication transaction sequence number, a status code, a challenge text, a robust security network (RSN), and a limited cycle group.

[0100] The STA may send an authentication request frame to the AP. The AP may determine whether to allow authentication of the STA based on information included in the received authentication request frame. The AP may provide the STA with an authentication process result via an authentication response frame.

[0101] 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 related to various capabilities, a beacon listening interval, a service set identifier (SSID), supported rates, supported channels, RSN, a mobility domain, a supported operation category, a traffic indication map (TIM) broadcast request, and interworking service capabilities. For example, the association response frame may include information related to 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 scanning parameters, a TIM broadcast response, and a QoS map.

[0102] 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).

[0103] Figure 4 An example of PPDU used in the IEEE standard is shown.

[0104] 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).

[0105] Figure 4An example of a HE PPDU according to IEEE 802.11ax is also shown. 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 the HE-SIG-B may be omitted in the PPDU for a single user.

[0106] like Figure 4 As shown, the HE-PPDU for multiple users (MU) may include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a high efficiency signal A (HE-SIG A), a high efficiency signal B (HE-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 sent within the time period shown (i.e., 4 or 8 μs).

[0107] The following describes a resource unit (RU) for a PPDU. A RU may include multiple subcarriers (or tones). A RU may be used to send signals to multiple STAs according to OFDMA. In addition, a RU may also be defined as sending a signal to one STA. A RU may be used for an STF, an LTF, a data field, etc.

[0108] Figure 5 The layout of resource units (RUs) used in a frequency band of 20 MHz is shown.

[0109] like Figure 5 As shown, resource units (RUs) corresponding to different numbers of tones (i.e., subcarriers) may be used to form some fields of the HE-PPDU. For example, resources may be allocated for the HE-STF, HE-LTF, and data fields in the RU shown.

[0110] like Figure 5 As shown in the uppermost portion of , 26 units (i.e., units corresponding to 26 tones) may be set. Six tones may be used for a guard band in the leftmost band of the 20 MHz band, and five tones may be used for a guard band in the rightmost band of the 20 MHz band. In addition, seven DC tones may be inserted in the center band (i.e., the DC band), and 26 units corresponding to 13 tones on each of the left and right sides of the DC band may be set. 26 units, 52 units, and 106 units may be allocated to other bands. Each unit may be allocated to a receiving STA (i.e., a user).

[0111] Figure 5 The layout of the RU in can be used not only for multiple users (MU) but also for a single user (SU), in which case one 242 unit can be used and three DC tones can be inserted, such as Figure 5 shown at the bottom.

[0112] although Figure 5 RUs of various sizes are proposed, namely, 26-RU, 52-RU, 106-RU, and 242-RU, but RUs of a specific size may be expanded or increased. Therefore, the present embodiment is not limited to a specific size of each RU (ie, the number of corresponding tones).

[0113] Figure 6 The layout of RUs used in a frequency band of 40 MHz is shown.

[0114] Similar to using RUs with various sizes Figure 5 ,exist Figure 6 In the example of 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 the guard band in the leftmost band of the 40MHz band, and 11 tones can be used for the guard band in the rightmost band of the 40MHz band.

[0115] like Figure 6 As shown in FIG. 4, 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.

[0116] Figure 7 The layout of RUs used in the 80 MHz frequency band is shown.

[0117] Similar to using RUs with various sizes Figure 5 and Figure 6 ,exist Figure 7 In the example of 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, etc., 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, etc. may be used. In addition, seven DC tones may be inserted in the center frequency, 12 tones may be used for a guard band in the leftmost band of the 80 MHz band, and 11 tones may be used for a guard band in the rightmost band of the 80 MHz band. In addition, 26-RU corresponding to 13 tones on each of the left and right sides of the DC band may be used.

[0118] 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.

[0119] The RU 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 a trigger frame, and can allocate a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to the second STA. Thereafter, the first STA may send a first trigger-based PPDU based on the first RU, and the second STA may send a second trigger-based PPDU based on the second RU. The first / second triggered PPDUs are sent to the AP in the same (or overlapping) time period.

[0120] 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 may allocate 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 through the first RU in one MU PPDU, and may transmit the HE-STF, HE-LTF, and Data fields for the second STA through the second RU.

[0121] Information about the layout of RUs may be signaled via HE-SIG-B.

[0122] Figure 8 The structure of the HE-SIG-B field is shown.

[0123] 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 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 be applied to only any one of the multiple users.

[0124] like Figure 8 As shown, the common field 820 and the user-specific field 830 may be encoded separately.

[0125] 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.

[0126] An example of the case where the RU allocation information consists of 8 bits is as follows.

[0127] [Table 1]

[0128]

[0129] 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 , 52-RU can be allocated to the far right, and seven 26-RUs can be allocated to its left.

[0130] The example of Table 1 shows only some RU locations where RU allocation information can be displayed.

[0131] For example, the RU allocation information may include the example in Table 2 below.

[0132] [Table 2]

[0133]

[0134] "01000y2y1y0" relates 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) may be allocated to the 106-RU based on the MU-MIMO scheme. Specifically, up to 8 STAs (e.g., user STAs) may 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 may be N+1.

[0135] Typically, multiple STAs (eg, user STAs) different from each other may be allocated to multiple RUs. However, multiple STAs (eg, user STAs) may be allocated to one or more RUs having at least a specific size (eg, 106 subcarriers) based on the MU-MIMO scheme.

[0136] like Figure 8As 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 allocated to each of the nine 26-RUs (e.g., nine user STAs may be allocated). That is, up to 9 user STAs may be allocated to a specific channel through the OFDMA scheme. In other words, up to 9 user STAs may be allocated to a specific channel through a non-MU-MIMO scheme.

[0137] For example, when RU allocation is set to "01000y2y1y0", multiple STAs can be allocated to the 106-RU arranged on the leftmost side through the MU-MIMO scheme, and five user STAs can be allocated to the five 26-RUs arranged on the right side thereof through the non-MU MIMO scheme. Fig. 9 .

[0138] Fig. 9 An example is shown in which multiple user STAs are assigned to the same RU through the MU-MIMO scheme.

[0139] For example, when Fig. 9 When the RU allocation is set to "01000010", the 106-RU may be allocated to the leftmost side of a specific channel, and five 26-RUs may be allocated to the right side thereof. In addition, three user STAs may be allocated to the 106-RU through the MU-MIMO scheme. As a result, since eight user STAs are allocated, the user-specific field 830 of the HE-SIG-B may include eight user fields.

[0140] Eight user fields can be pressed Fig. 9 In addition, Figure 8 As shown, two user fields can be implemented using one user block field.

[0141] Figure 8 and Fig. 9 The user field shown may be configured based on two formats. That is, the user field related to the MU-MIMO scheme may be configured in a first format, and the user field related to the non-MIMO scheme may be configured in a second format. Fig. 9 In the example of , 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).

[0142] 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.

[0143] For example, the first bit (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. In addition, the second bit (i.e., B11-B14) in the user field (i.e., 21 bits) may include information related to the space configuration. Specifically, examples of the second bit (i.e., B11-B14) may be shown in Tables 3 and 4 below.

[0144] [Table 3]

[0145]

[0146] [Table 4]

[0147]

[0148] 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. Fig. 9 When 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, and N_STS[3]=1. That is, in Fig. 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.

[0149] As shown in the examples of Table 3 and / or Table 4, the information about the number of spatial streams for the user STA (i.e., the second bits, B11-B14) may consist of 4 bits. In addition, the information about the number of spatial streams for the user STA (i.e., the second bits, B11-B14) may support up to eight spatial streams. In addition, the information about the number of spatial streams for the user STA (i.e., the second bits, B11-B14) may support up to four spatial streams for one user STA.

[0150] 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.

[0151] 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 index 0 to index 11. MCS information may include information related to constellation modulation type (e.g., BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, etc.) and information related to coding rate (e.g., 1 / 2, 2 / 3, 3 / 4, 5 / 6e, etc.). Information related to channel coding type (e.g., LCC or LDPC) may not be included in the MCS information.

[0152] In addition, the fourth bit (ie, B19) in the user field (ie, 21 bits) may be a reserved field.

[0153] In addition, the fifth bit (ie, B20) in the user field (ie, 21 bits) may include information on the coding type (eg, BCC or LDPC). That is, the fifth bit (ie, B20) may include information on the type of channel coding (eg, BCC or LDPC) applied to the data field in the PPDU including the corresponding SIG-B.

[0154] The above example relates to a user field in the first format (format of the MU-MIMO scheme). An example of a user field in the second format (format of a non-MU-MIMO scheme) is as follows.

[0155] 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).

[0156] Fig.10UL-MU-based operation is 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.

[0157] 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.

[0158] Reference Figures 11 to 13 Describes specific features of the trigger frame. Even when UL-MU communication is used, an Orthogonal Frequency Division Multiple Access (OFDMA) scheme or a MU-MIMO scheme may be used, and OFDMA and MU-MIMO schemes may be used simultaneously.

[0159] Fig.11 An example of a trigger frame is shown. Fig.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.

[0160] Fig.11 The 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.

[0161] Fig.11 The frame control field 1110 may include information related to the MAC protocol version and additional 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.

[0162] In addition, the RA field 1130 may include address information of the receiving STA of the corresponding trigger frame, and may be optionally omitted. The TA field 1140 may include 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.

[0163] In addition, preferably including and receiving Fig.11 The number of receiving STAs of 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".

[0164] in addition, Fig.11 The trigger frame may include a padding field 1170 and a frame check sequence field 1180.

[0165] Fig.11 Each of the illustrated per-user information fields 1160#1 to 1160#N may include a plurality of subfields.

[0166] Fig.12 An example of a common information field of a trigger frame is shown. Fig.12 The subfields of may be partially omitted, and additional subfields may be added. In addition, the length of each subfield shown may be changed.

[0167] The length field 1210 shown has the same value as the length field of the L-SIG field of the uplink PPDU sent 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.

[0168] In addition, the tandem identifier field 1220 indicates whether a tandem operation is performed. The tandem operation means that downlink MU transmission and uplink MU transmission are performed together in the same TXOP. That is, it means that downlink MU transmission is performed, and then uplink MU transmission is performed after a preset time (e.g., SIFS). During the tandem operation, only one transmitting device (e.g., AP) can perform downlink communication, and multiple transmitting devices (e.g., non-AP) can perform uplink communication.

[0169] The CS request field 1230 indicates whether a wireless medium status or NAV, etc. must be considered in a case where a receiving device that has received a corresponding trigger frame transmits a corresponding uplink PPDU.

[0170] 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.

[0171] 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, requesting a block ACK / NACK, etc.

[0172] It may be assumed that the trigger type field 1260 of the trigger frame in this specification indicates a basic type of trigger frame for a typical trigger. For example, the basic type of trigger frame may be referred to as a basic trigger frame.

[0173] Fig.13 An example of subfields included in the per-user information field is shown. Fig.13 The user information field 1300 may be understood as referring to the above Fig.11 Any of the per-user information fields 1160#1 to 1160#N mentioned above. Included in Fig.13 The subfields in the user information field 1300 may be partially omitted, and additional subfields may be added. In addition, the length of each subfield shown may be changed.

[0174] Fig.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 an association identifier (AID) value of the receiving STA.

[0175] 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.

[0176] Fig.13 The subfield of 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".

[0177] in addition, Fig.13The subfield of 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".

[0178] Hereinafter, a UL OFDMA-based random access (UORA) scheme will be described.

[0179] Fig.14 Describe the technical features of the UORA scheme.

[0180] The sending STA (e.g., AP) can Fig.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, Fig.13 The information related to RU 1 to RU 6 may be included in, for example, the user identifier field 1310. Fig.13 AID=0 may mean UORA resources for associated STAs, and AID=2045 may mean UORA resources for non-associated STAs. Fig.14 The 1st to 3rd RU resources can be used as UORA resources for associated STAs. Fig.14 The 4th RU resource and the 5th RU resource can be used as UORA resources for non-associated STAs. Fig.14 The 6th RU resources may be used as typical resources for UL MU.

[0181] exist Fig.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. Fig.14 For STA4 in , since the AID of STA4 (eg, AID=3) is included in the trigger frame, resources of RU 6 are allocated without backoff.

[0182] Specifically, due to Fig.14STA1 is the associated STA, so the total number of qualified RA RUs for STA1 is 3 (RU1, RU 2, and RU 3), so STA1 decrements the OBO counter by 3 to make the OBO counter 0. In addition, since Fig.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, due to Fig.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.

[0183] Fig.15 An example of channels used / supported / defined in the 2.4 GHz band is shown.

[0184] The 2.4 GHz band may be referred to as other terms such as a first frequency band. In addition, the 2.4 GHz band may mean 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).

[0185] A plurality of 20 MHz channels may be included in the 2.4 GHz frequency band. The 20 MHz in 2.4 GHz may have a plurality of 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. The channel index may be referred to as various terms such as channel number, etc. The specific values ​​of the channel index and the center frequency may vary.

[0186] Fig.15 An example is given of 4 channels in the 2.4 GHz frequency band. Each of the 1st frequency domain 1510 to the 4th frequency domain 1540 shown herein may include one channel. For example, the 1st 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 2nd frequency domain 1520 may include channel 6. In this case, the center frequency of channel 6 may be set to 2437 MHz. The 3rd frequency domain 1530 may include channel 11. In this case, the center frequency of channel 11 may be set to 2462 MHz. The 4th frequency domain 1540 may include channel 14. In this case, the center frequency of channel 14 may be set to 2484 MHz.

[0187] Fig.16 Shows an example of channels used / supported / defined in the 5 GHz band.

[0188] The 5 GHz band may be referred to as other terms such as a second frequency band, etc. The 5 GHz band may mean 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 band may include a plurality of channels between 4.5 GHz and 5.5 GHz. Fig.16 The specific values ​​shown may vary.

[0189] Multiple channels within the 5 GHz band include Unlicensed National Information Infrastructure (UNII)-1, UNII-2, UNII-3, and ISM. UNII-1 may be referred to as UNII Low. UNII-2 may include frequency domains referred to as UNII Mid and UNII-2 Extended. UNII-3 may be referred to as UNII-Upper.

[0190] A plurality of channels may be configured within the 5 GHz frequency band, and the bandwidth of each channel may be set differently, for example, to 20 MHz, 40 MHz, 80 MHz, 160 MHz, etc. For example, the 5170 MHz to 5330 MHz frequency domain / range within UNII-1 and UNII-2 may be divided into eight 20 MHz channels. The 5170 MHz to 5330 MHz frequency domain / range may be divided into four channels via a 40 MHz frequency domain. The 5170 MHz to 5330 MHz frequency domain / range may be divided into two channels via an 80 MHz frequency domain. Alternatively, the 5170 MHz to 5330 MHz frequency domain / range may be divided into one channel via a 160 MHz frequency domain.

[0191] Fig.17 Shows examples of channels used / supported / defined in the 6 GHz band.

[0192] The 6 GHz frequency band may be referred to as 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. Fig.17 The specific values ​​shown may vary.

[0193] For example, Fig.17 The 20MHz channel can be defined starting from 5.940GHz. Fig.17 Among the 20 MHz channels of the channel, the leftmost channel may have an index of 1 (or a channel index, a 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.

[0194] therefore, Fig.17 The index (or channel number) of the 2MHz channel 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, Fig.17 The index of the 40MHz 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.

[0195] Despite Fig.17 20, 40, 80, and 160 MHz channels are shown in the example of , but a 240 MHz channel or a 320 MHz channel may be additionally added.

[0196] Hereinafter, a PPDU transmitted / received in a STA of the present specification will be described.

[0197] Fig.18 An example of PPDU used in this specification is shown.

[0198] Fig.18 The PPDU of the EHT PPDU may be referred to as various terms such as EHT PPDU, TX PPDU, RX PPDU, first type or Nth type PPDU, etc. For example, in the present specification, PPDU or EHT PPDU may be referred to as 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.

[0199] Fig.18 The PPDU may indicate all or part of the PPDU type used in the EHT system. For example, Fig.18 The example of can be used for both single user (SU) mode and multi-user (MU) mode. In other words, Fig.18 The PPDU may be a PPDU for one receiving STA or multiple receiving STAs. Fig.18 When the PPDU is used in trigger-based (TB) mode, it can be omitted Fig.18 In other words, a STA that has received a trigger frame for uplink MU (UL-MU) may send Fig.18 The PPDU of EHT-SIG is omitted in the example.

[0200] exist Fig.18 In the present invention, 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 a physical layer.

[0201] Fig.18 The subcarrier spacing of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG and EHT-SIG fields may be determined to be 312.5kHz, and the subcarrier spacing of the EHT-STF, EHT-LTF and data fields may be determined to be 78.125kHz. That is, the tone index (or subcarrier index) of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG and EHT-SIG fields may be expressed in units of 312.5kHz, and the tone index (or subcarrier index) of the EHT-STF, EHT-LTF and data fields may be expressed in units of 78.125kHz.

[0202] exist Fig.18 In the PPDU, L-LTE and L-STF can be the same as those in the legacy fields.

[0203] For example, Fig.18 The L-SIG field may include 24 bits of bit 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 a 6-bit tail bit. 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 type of the PPDU. For example, when the PPDU is a non-HT, HT, VHT PPDU, or EHT PPDU, the value of the length field may be determined as a multiple of 3. For example, when the PPDU is an HE PPDU, the value of the length field may be determined as "a multiple of 3" + 1 or "a multiple of 3" + 2. In other words, for non-HT, HT, VHT PPDI, or EHT PPDU, the value of the length field may be determined as "a multiple of 3", and for HE PPDU, the value of the length field may be determined as "a multiple of 3" + 1 or "a multiple of 3" + 2.

[0204] For example, the transmitting STA may apply BCC encoding based on 1 / 2 coding rate 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 positions other than the pilot subcarriers {subcarrier indexes -21, -7, +7, +21} and the DC subcarrier {subcarrier index 0}. As a result, the 48 BPSK symbols may be mapped to subcarrier indexes -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 of {-1, -1, -1, 1} to the subcarrier index {-28, -27, +27, +28}. The above signal may be used for channel estimation in the frequency domain corresponding to {-28, -27, +27, +28}.

[0205] The transmitting STA may generate the RL-SIG in the same manner as the L-SIG. BPSK modulation may be applied to the RL-SIG. The receiving STA may know whether the RX PPDU is a HE PPDU or an EHT PPDU based on the presence of the RL-SIG.

[0206] Universal SIG (U-SIG) can be inserted in Fig.18 The U-SIB may be referred to by various terms such as a first SIG field, a first SIG, a first type SIG, a control signal, a control signal field, a first (type) control signal, etc.

[0207] 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 adjacent OFDM symbols). Each symbol of the U-SIG (e.g., OFDM symbol) may have a duration of 4 μs. Each symbol of the U-SIG may be used to send 26 bits of information. For example, each symbol of the U-SIG may be sent / received based on 52 data tones and 4 pilot tones.

[0208] For example, through U-SIG (or U-SIG field), A-bit information (e.g., 52 uncoded bits) may be transmitted. The first symbol of U-SIG may transmit the first X bits of information of A-bit information (e.g., 26 uncoded bits), and the second symbol of U-SIB may transmit the remaining Y bits of information of A-bit information (e.g., 26 uncoded bits). For example, the transmitting STA may obtain 26 uncoded bits included in each U-SIG symbol. The transmitting STA may perform convolutional coding (i.e., BCC coding) based on a rate of R=1 / 2 to generate 52 coded bits, and may perform interleaving on the 52 coded bits. The transmitting STA may perform BPSK modulation on the interleaved 52 coded bits to generate 52 BPSK symbols to be allocated to each U-SIG symbol. In addition to DC index 0, one U-SIG symbol may 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 sent based on the remaining tones (subcarriers) except for the pilot tones (ie, tones -21, -7, +7, +21).

[0209] 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 having a length of 4 bits) and a tail field (e.g., a field having 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 of the first symbol allocated to the U-SIG and the remaining 16 bits of 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 grid of the convolutional decoder and may be set to, for example, "000000".

[0210] A bit information (e.g., 52 uncoded bits) transmitted by U-SIG (or U-SIG field) may be divided into version-independent bits and version-dependent bits. For example, the version-independent bits may have a fixed size or a variable size. For example, the version-independent bits may be allocated only to the first symbol of the U-SIG, or the version-independent bits may be allocated to both the first symbol and the second symbol of the U-SIG. For example, the version-independent bits and the version-dependent bits may be referred to as various terms such as first control bits, second control bits, etc.

[0211] 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, the first value of the 3-bit PHY version identifier may indicate that the TX / RX PPDU is an EHT PPDU. In other words, when the transmitting STA transmits an EHT PPDU, the 3-bit PHY version identifier may be set to a first value. In other words, based on the PHY version identifier having a first value, the receiving STA may determine that the RX PPDU is an EHT PPDU.

[0212] For example, the version-independent bit U-SIG may include a 1-bit UL / DL flag field. A first value of the 1-bit UL / DL flag field relates to UL communication, and a second value of the UL / DL flag field relates to DL communication.

[0213] 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.

[0214] 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.

[0215] 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 on whether a dual subcarrier modulation (DCM) scheme is applied to the EHT-SIG; 4) a field including information on the number of symbols used for the EHT-SIG; 5) a field including information on whether the EHT-SIG is generated across the full frequency band; 6) a field including information on the type of EHT-LTF / STF; and 7) information related to a field indicating the EHT-LTF length and the CP length.

[0216] Can Fig.18 Preamble puncturing is applied to the PPDU of the primary 20 MHz band. Preamble puncturing means applying puncturing to part of the full band (e.g., the secondary 20 MHz band). For example, when sending an 80 MHz PPDU, the STA may apply puncturing to the secondary 20 MHz band in the 80 MHz band, and may send the PPDU only through the primary 20 MHz band and the secondary 40 MHz band.

[0217] For example, the pattern of the leading perforation may be preconfigured. For example, when the first perforation pattern is applied, perforation may be applied only to the auxiliary 20 MHz band within the 80 MHz band. For example, when the second perforation pattern is applied, perforation may be applied only to any one of the two auxiliary 20 MHz bands included in the auxiliary 40 MHz band within the 80 MHz band. For example, when the third perforation pattern is applied, perforation may be applied only to the auxiliary 20 MHz band included in the main 80 MHz band within the 160 MHz band (or the 80+80 MHz band). For example, when the fourth perforation is applied, in the presence of the main 40 MHz band included in the 80 MHaz band within the 160 MHz band (or the 80+80 MHz band), perforation may be applied to at least one 20 MHz channel that does not belong to the main 40 MHz band.

[0218] Information related to the preamble puncturing applied to the PPDU may be included in the U-SIG and / or the EHT-SIG. For example, the first field of the U-SIG may include information related to the contiguous bandwidth, and the second field of the U-SIG may include information related to the preamble puncturing applied to the PPDU.

[0219] 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 may 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). In addition, the EHT-SIG adjacent to the first U-SIG may include information related to the preamble puncturing applied to the second 80 MHz frequency band (i.e., information related to the preamble puncturing pattern), and the EHT-SIG adjacent to the second U-SIG may include information related to the preamble puncturing applied to the first 80 MHz frequency band (i.e., information related to the preamble puncturing pattern).

[0220] Additionally or alternatively, based on the following method, the U-SIG and the EHT-SIG may include information related to preamble puncturing. The U-SIG may include information related to preamble puncturing for all frequency bands (i.e., information related to preamble puncturing patterns). 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 preamble puncturing patterns).

[0221] The U-SIG may be configured in units of 20 MHz. For example, when configuring an 80 MHz PPDU, the U-SIG may be duplicated. That is, four identical U-SIGs may be included in the 80 MHz PPDU. A PPDU with a bandwidth exceeding 80 MHz may include different U-SIGs.

[0222] Fig.18 The EHT-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 4us. Information on the number of symbols used for the EHT-SIG may be included in the U-SIG.

[0223] The EHT-SIG may include reference Figure 8 and Fig. 9 The technical features of HE-SIG-B are described in detail. Figure 8 As in the example of , the EHT-SIG may include a common field and a user-specific field. The common field of the EHT-SIG may be omitted, and the number of user-specific fields may be determined based on the number of users.

[0224] like Figure 8 As in the example of , the common field of EHT-SIG and the user-specific field of EHT-SIG may be encoded separately. One user block field included in the user-specific field may include information for two users, but the optimal one user block field included in the user-specific field may include information for one user. That is, one user block field of EHT-SIG may include at most two user fields. Fig. 9 As 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.

[0225] like Figure 8 As in the example of , the common field of EHT-SIG may include CRC bits and tail bits. The length of the CRC bits may be determined to be 4 bits. The length of the tail bits may be determined to be 6 bits and may be set to "000000".

[0226] like Figure 8As in the example of , the common field of EHT-SIG may include RU allocation information. The RU allocation information may imply information related to the location of the RU to which multiple users (ie, multiple receiving STAs) are allocated. As in Table 1, the RU allocation information may be configured in units of 8 bits (or N bits).

[0227] The examples of Tables 5 to 7 are examples of 8-bit (or N-bit) information for various RU allocations. The indexes shown in the respective tables may be modified, and some entries in Tables 5 to 7 may be omitted, and entries may be added (not shown).

[0228] The examples of Tables 5 to 7 relate to information related to the location of RUs allocated to the 20 MHz frequency band. For example, "index 0" of Table 5 may be in the case where nine 26-RUs are allocated separately (e.g., Figure 5 Nine 26-RU cases are shown) for use.

[0229] In addition, multiple RUs may be allocated to one STA in the EHT system. For example, with respect to "index 60" of Table 6, one 26-RU may be allocated to the leftmost side of the 20 MHz band for one user (ie, receiving STA), one 26-RU and one 52-RU may be allocated to the right side thereof, and five 26-RUs may be allocated to the right side thereof alone.

[0230] [Table 5]

[0231]

[0232] [Table 6]

[0233]

[0234] [Table 7]

[0235]

[0236] 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 a compressed mode. When the compressed mode is used, multiple users (ie, multiple receiving STAs) may decode the PPDU (eg, the data field of the PPDU) based on non-OFDMA. That is, multiple users of the EHT PPDU may decode the PPDU (eg, the data field of the PPDU) received via the same frequency band. In addition, when the non-compressed mode is used, multiple users of the EHT PPDU may decode the PPDU (eg, the data field of the PPDU) based on OFDMA. That is, multiple users of the EHT PPDU may receive the PPDU (eg, the data field of the PPDU) via different frequency bands. The EHT-SIG may be configured based on various MCS schemes. As described above, information related to the MCS scheme applied to the EHT-SIG may be included in the U-SIG. The EHT-SIG may be configured based on the DCM scheme. For example, among the N data tones (e.g., 52 data tones) allocated for the EHT-SIG, the first modulation scheme may be applied to half of the contiguous tones, and the second modulation scheme may be applied to the remaining half of the contiguous tones. That is, the transmitting STA may modulate specific control information using the first modulation scheme by the first symbol and allocate it to half of the contiguous tones, and may use the second modulation scheme to modulate the same control information using the second symbol and allocate it to the remaining half of the contiguous tones. As described above, information (e.g., a 1-bit field) about whether the DCM scheme is applied to the EHT-SIG may be included in the U-SIG.

[0237] Fig.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. Fig.18 The HE-LTF can be used to estimate channels in a MIMO environment or an OFDMA environment.

[0238] Fig.18The EHT-STF can be set to various types. For example, a first type of STF (e.g., 1x STF) may 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 may have a period of 0.8 μs, and the periodic signal of 0.8 μs may be repeated 5 times to become a first type of STF having a length of 4 μs. For example, a second type of STF (e.g., 2x STF) may 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 may have a period of 1.6 μs, and the periodic signal of 1.6 μs may be repeated 5 times to become a second type of STF having a length of 8 μs. In the following, an example of a sequence for configuring the EHT-STF (i.e., an EHT-STF sequence) is proposed. The following sequence may be modified in various ways.

[0239] The EHT-STF may be configured based on the following sequence M.

[0240] <Formula 1>

[0241] M={-1,-1,-1,1,1,1,-1,1,1,1,-1,1,1,-1,1}

[0242] The EHT-STF for a 20MHz PPDU may be configured based on the following formula. The following example may be a first type (ie, 1xSTF) sequence. For example, the first type sequence may not be included in a trigger-based (TB) PPDU, but may be included in an EHT-PPDU. In the following formula, (a:b:c) may mean the duration of a b tone interval (ie, subcarrier interval) defined as from a tone index (ie, subcarrier index) "a" to a tone index "c". For example, the following formula 2 may represent a sequence of 16 tone intervals defined as from a tone index -112 to a tone index 112. Since a subcarrier spacing of 78.125kHz is applied to the EHT-STR, the 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.

[0243] <Formula 2>

[0244] EHT-STF(-112:16:112)={M}*(1+j) / sqrt(2)

[0245] EHT-STF(0)=0

[0246] 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.

[0247] <Formula 3>

[0248] EHT-STF(-240:16:240)={M,0,-M}*(1+j) / sqrt(2)

[0249] The EHT-STF for 80MHz PPDU may be configured based on the following formula: The following example may be a first type (ie, 1xSTF) sequence.

[0250] <Formula 4>

[0251] EHT-STF(-496:16:496)={M,1,-M,0,-M,1,-M}*(1+j) / sqrt(2)

[0252] The EHT-STF for 160MHz PPDU may be configured based on the following formula: The following example may be a first type (ie, 1xSTF) sequence.

[0253] <Formula 5>

[0254] EHT-STF(-1008:16:1008)={M,1,-M,0,-M,1,-M,0,-M,-1,M,0,-M,1,-M}*(1+j) / sqrt(2)

[0255] 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.

[0256] <Formula 6>

[0257] EHT-STF(-496:16:496)={-M,-1,M,0,-M,1,-M}*(1+j) / sqrt(2)

[0258] The following Equations 7 to 11 relate to examples of the second type (ie, 2x STF) sequence.

[0259] <Formula 7>

[0260] EHT-STF(-120:8:120)={M,0,-M}*(1+j) / sqrt(2)

[0261] The EHT-STF for 40 MHz PPDU may be configured based on the following formula.

[0262] <Formula 8>

[0263] EHT-STF(-248:8:248)={M,-1,-M,0,M,-1,M}*(1+j) / sqrt(2)

[0264] EHT-STF(-248)=0

[0265] EHT-STF(248)=0

[0266] The EHT-STF for 80 MHz PPDU may be configured based on the following formula.

[0267] <Formula 9>

[0268] EHT-STF(-504:8:504)={M,-1,M,-1,-M,-1,M,0,-M,1,M,1,-M,1,-M}*(1+j) / sqrt(2)

[0269] The EHT-STF for 160 MHz PPDU may be configured based on the following formula.

[0270] <Formula 10>

[0271] 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)

[0272] EHT-STF(-8)=0,EHT-STF(8)=0,

[0273] EHT-STF(-1016)=0,EHT-STF(1016)=0

[0274] 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.

[0275] <Formula 11>

[0276] EHT-STF(-504:8:504)={-M,1,-M,1,M,1,-M,0,-M,1,M,1,-M,1,-M}*(1+j) / sqrt(2)

[0277] EHT-STF(-504)=0,

[0278] EHT-STF(504)=0

[0279] The EHT-LTF may have a first type, a second type, and a third type (ie, 1x, 2x, 4x LTF). For example, the first / second / third type LTF may 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 may have a time length of 3.2 / 6.4 / 12.8 μs. In addition, GIs of various lengths (eg, 0.8 / 1 / 6 / 3.2 μs) may be applied to the first / second / third type LTF.

[0280] Information about the type of STF and / or LTF (including information about the GI applied to the LTF) may be included in Fig.18 SIG-A field and / or SIG-B field, etc.

[0281] Fig.18 The PPDU (e.g., EHT-PPDU) may be based on Figure 5 and Figure 6 to configure the example.

[0282] For example, an EHT PPDU transmitted on a 20 MHz frequency band (ie, a 20 MHz EHT PPDU) may be based on Figure 5 That is, the location of the RUs of the EHT-STF, EHT-LTF, and data fields included in the EHT PPDU may be as follows: Figure 5 OK as shown.

[0283] The EHT PPDU transmitted in the 40 MHz band (ie, 40 MHz EHT PPDU) may be based on Figure 6 That is, the location of the RUs of the EHT-STF, EHT-LTF, and data fields included in the EHT PPDU may be as follows: Figure 6 OK as shown.

[0284] because Figure 6 The RU position corresponds to 40MHz, so when Figure 6 The tone plan for 80 MHz can be determined when the pattern of is repeated twice. Figure 7 The RU is Figure 6 The RU repeats the new tone schedule twice to send the 80MHz EHTPPDU.

[0285] when Figure 6When the pattern of is repeated twice, 23 tones (i.e., 11 guard tones + 12 guard tones) may be configured in the DC region. That is, the tone plan of the 80MHz EHT PPDU allocated based on OFDMA may have 23 DC tones. In contrast, the 80MHz EHT PPDU allocated based on non-OFDMA (i.e., non-OFDMA full bandwidth 80MHz PPDU) may be configured based on 996-RU and may include 5 DC tones, 12 left guard tones, and 11 right guard tones.

[0286] The tone plan for 160 / 240 / 320MHz can be Figure 6 The pattern is configured in a manner that is repeated multiple times.

[0287] Fig.18 The PPDU may be determined (or identified) as an EHT PPDU based on the following method.

[0288] 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 the RL-SIG in which the L-SIG of the RX PPDU is repeated is detected; and 3) when the result of applying "modulo 3" to the value of the length field of the L-SIG of the RX PPDU is detected as "0", the RX PPDU may be determined as 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 Fig.18 The type of the EHT PPDU (e.g., SU / MU / triggered / extended range type) is detected by bit information included in the symbol after the RL-SIG of the U-SIG. In other words, based on: 1) the first symbol after the L-LTF signal which is a BPSK symbol; 2) the RL-SIG which is adjacent to the L-SIG field and is the same as the L-SIG; 3) the L-SIG including the length field to which the result of applying "modulo 3" is set to "0"; and 4) the 3-bit PHY version identifier of the above-mentioned U-SIG (e.g., the PHY version identifier having the first value), the receiving STA can determine that the RX PPDU is an EHT PPDU.

[0289] For example, the receiving STA may determine the type of the RX PPDU as the EHT PPDU based on the following aspects. For example, 1) when the first symbol after the L-LTF signal is a BPSK symbol; 2) when the RL-SIG 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 as "1" or "2", the RX PPDU may be determined as the HEPPDU.

[0290] For example, the receiving STA may determine the type of the RX PPDU as non-HT, HT, and VHT PPDU based on the following aspects. For example, 1) when the first symbol after the L-LTF signal is a BPSK symbol; and 2) when the RL-SIG in which the L-SIG is repeated is not detected, the RX PPDU may be determined as non-HT, HT, and VHT PPDU. In addition, even if the receiving STA detects RL-SIG repetition, when the result of applying "modulo 3" to the length value of the L-SIG is detected as "0", the RX PPDU may be determined as non-HT, HT, and VHT PPDU.

[0291] 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 Fig.18 PPDU transmission / reception signal. Fig.18 The PPDU can be used to send / receive various types of frames. For example, Fig.18 The PPDU may 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) notification, and trigger frames. For example, Fig.18 The PPDU may 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, Fig.18 The PPDU can be used for data frames. For example, Fig.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.

[0292] Fig.19 An example of a modified transmitting device and / or receiving device of the present specification is shown.

[0293] Figure 1 Each device / STA of sub-graph (a) / (b) can be Fig.19 Modifications shown. Fig.19 The transceiver 630 can be used with Figure 1 The transceivers 113 and 123 are the same. Fig.19 The transceiver 630 may include a receiver and a transmitter.

[0294] Fig.19 The processor 610 can be used with Figure 1 The processors 111 and 121 are the same. Alternatively, Fig.19 The processor 610 can be used with Figure 1The processing chips 114 and 124 are the same.

[0295] Fig.19 The memory 620 can be connected with Figure 1 The memories 112 and 122 are the same. Alternatively, Fig.19 The memory 620 may be Figure 1 The memories 112 and 122 are different separate external memories.

[0296] Reference Fig.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 telephony devices such as mobile phones and computers.

[0297] Reference Fig.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.

[0298] Fig. 20 An example of HE-PPDU is shown.

[0299] The illustrated L-STF 2000 may include a short training Orthogonal Frequency Division Multiplexing symbol (OFDM). The L-STF 2000 may be used for frame detection, automatic gain control (AGC), diversity detection, and coarse frequency / time synchronization.

[0300] The L-LTF 2010 may include a long training Orthogonal Frequency Division Multiplexing (OFDM) symbol. The L-LTF 2010 may be used for fine frequency / time synchronization and channel estimation.

[0301] L-SIG 2020 may be used to transmit control information. L-SIG 2020 may include information related to data transmission rate and data length. In addition, L-SIG 2020 may be transmitted repeatedly. That is, L-SIG 2020 may be configured in a repetitive format (e.g., may be referred to as R-LSIG).

[0302] HE-SIG-A 2030 may include control information common to the receiving station(s).

[0303] Specifically, HE-SIG-A 2030 may include information related to the following: 1) DL / UL indicator; 2) BSS color field as an identifier of the BSS; 3) a field indicating the remaining time of the current TXOP duration / period; 4) a bandwidth field indicating whether it is 20, 40, 80, 160, 80+80 MHz; 5) a field indicating the MCS scheme applied to HE-SIG-B; 6) an indication field of HE-SIG-B indicating whether modulation dual subcarrier modulation (DCM) is applied to MCS; 7) a field indicating the number of symbols used for HE-SIG-B; 8) a field indicating whether HE-SIG-B is generated on all / entire frequency bands; 9) a field indicating the number of symbols of HE-LTF; 10) a field indicating the HE-LTF length and CP length; 11) a field indicating whether there are additional OFDM symbols for LDPC coding; 12) a field indicating control information about packet extension (PE); and / or 13) a field indicating information related to the CRC field of HE-SIG-A, etc. At least one field of the HE-SIG-A may be omitted or modified. In addition, in other environments where the HE-SIG-A is not a multiple user (MU) environment, some fields may be added or omitted.

[0304] In addition, the HE-SIG-A 2030 may include two parts: HE-SIG-A1 and HE-SIG-A2. According to the corresponding PPDU, the HE-SIG-A1 and HE-SIG-A2 included in the HE-SIG-A may be defined according to the following format structure (field). First, the HE-SIG-A field of the HE SU PPDU may be defined as follows.

[0305] [Table 8]

[0306]

[0307] [Table 9]

[0308]

[0309] [Table 10]

[0310]

[0311]

[0312] [Table 11]

[0313]

[0314]

[0315] In addition, the HE-SIG-A field of the HE-MU PPDU may be defined as follows.

[0316] [Table 12]

[0317]

[0318]

[0319] [Table 13]

[0320]

[0321]

[0322] [Table 14]

[0323]

[0324]

[0325] [Table 15]

[0326]

[0327]

[0328] In addition, the HE-SIG-A field of the HE TB PPDU may be defined as follows.

[0329] [Table 16]

[0330]

[0331]

[0332] [Table 17]

[0333]

[0334] [Table 18]

[0335]

[0336] [Table 19]

[0337]

[0338]

[0339] [Table 20]

[0340]

[0341]

[0342] As described above, HE-SIG-B 2040 may be included only for a multi-user (MU) PPDU. Basically, HE-SIG-A 2050 or HE-SIG-B 2060 may include resource allocation information (or virtual resource allocation information) for at least one receiving STA.

[0343] The following describes technical features applicable to the EHT standard.

[0344] According to an embodiment of the present specification, the EHT standard may support a PPDU of 320MHz bandwidth and 160+160MHz. In addition, 240MHz transmission and 160+80MHz transmission may be supported. 240MHz transmission and 160+80MHz transmission may be configured by applying 80MHz preamble puncturing in 320MHz bandwidth and 160+160MHz bandwidth, respectively. For example, 240MHz bandwidth and 160+80MHz bandwidth may be configured based on three 80MHz channels including a primary 80MHz (channel).

[0345] According to an embodiment of the present specification, the EHT standard may reuse the tone plan of the IEEE 802.11ax standard for 20 / 40 / 80 / 160 / 80+80MHz PPDU. According to an embodiment, the 160MHz OFDMA tone plan of the IEEE 802.11ax standard may be repeated and used for 320MHz and 160+160MHz PPDU.

[0346] According to an embodiment of the present specification, the transmission of 240 MHz and 160+80 MHz may include three 80 MHz segments. For example, the tone plan of each 80 MHz segment may be configured in the same manner as the 80 MHz tone plan of the IEEE 802.11ax standard.

[0347] According to an embodiment of the present specification, a 160 MHz tone plan may be repeated and used for a non-OFDMA tone plan for a 320 / 160+160 MHz PPDU.

[0348] According to an embodiment of the present specification, a repeated HE160 tone plan may be used for a 320 / 160+160 MHz PPDU non-OFDMA tone plan.

[0349] According to an embodiment of the present specification, in each 160 MHz segment of a non-OFDMA tone plan for a 320 / 160+160 MHz PPDU, 12 and 11 null tones may be configured at the leftmost and rightmost sides, respectively.

[0350] According to an embodiment of the present specification, the data part of the EHT PPDU may use the same subcarrier spacing as the data part of the IEEE 802.11ax standard.

[0351] The technical features of a resource unit (RU) applicable to the EHT standard will be described below.

[0352] According to an embodiment of the present specification, in the EHT standard, one or more RUs may be allocated to a single STA. For example, the coding and interleaving schemes for multiple RUs allocated to a single STA may be set differently.

[0353] According to an embodiment of the present specification, a small RU can be aggregated with other small RUs. According to an embodiment of the present specification, a large RU can be aggregated with other large RUs.

[0354] For example, an RU with more than 242 tones may be defined / configured as a "large RU." For another example, an RU with less than 242 tones may be defined / configured as a "small RU."

[0355] According to an embodiment of the present specification, for each link, each STA may have one PSDU. According to an embodiment of the present specification, for LDPC coding, one encoder may be used for each PSDU.

[0356] Small-size RU

[0357] According to an embodiment of the present specification, the aggregation of small RUs may be configured not to cross a 20 MHz channel boundary. For example, RU106+RU26 and RU52+RU26 may be configured as an aggregation of small RUs.

[0358] According to an embodiment of the present specification, in a 20 MHz and 40 MHz PPDU, consecutive RU26 and RU106 may be aggregated / combined within a 20 MHz boundary.

[0359] According to an embodiment of the present specification, RU26 and RU52 may be aggregated / combined in 20 MHz and 40 MHz PPDUs.

[0360] For example, in 20MHz (or 20MHz PPDU), it can be Fig.21 An example of consecutive RU26 and RU52 is shown.

[0361] Fig.21 An example of aggregation of RU26 and RU52 in 20 MHz is shown.

[0362] refer to Fig.21, the shaded RU 26 and RU 52 may be aggregated. For example, the second RU 26 and the second RU 52 may be aggregated. For another example, the seventh RU and the third RU 52 may be aggregated.

[0363] For example, at 40MHz, Fig. 22 An example of consecutive RU26 and RU52 is described in .

[0364] Fig. 22 An example of aggregation of RU26 and RU52 in 40 MHz is shown.

[0365] refer to Fig. 22 , the shaded RU26 and RU52 may be aggregated. For example, the second RU26 and the second RU52 may be aggregated. For another example, the eighth RU26 and the third RU52 may be aggregated. For another example, the eleventh RU26 and the sixth RU52 may be aggregated. For another example, the seventeenth RU26 and the seventh RU52 may be aggregated.

[0366] According to an embodiment of the present specification, RU26 and RU52 may be aggregated / combined in a PPDU of 80 MHz.

[0367] For example, by Fig.23 An example of RU26 and RU52 being consecutive in 80 MHz may be shown.

[0368] Fig.23 An example of aggregation of RU26 and RU52 in 80 MHz is shown.

[0369] refer to Fig.23 , 80MHz can be divided into the first 40MHz and the second 40MHz. For example, in the first 40MHz, the eighth RU26 and the third RU52 can be aggregated. For example, in the first 40MHz, the eleventh RU26 and the sixth RU52 can be aggregated. For example, in the second 40MHz, the eighth RU26 and the third RU52 can be aggregated. For example, in the second 40MHz, the eleventh RU26 and the sixth RU52 can be aggregated.

[0370] According to an embodiment, when LDPC coding is applied, a single-tone mapper may be used for RUs less than 242 tones.

[0371] Large-size RU

[0372] According to an embodiment, in 320 / 160+160MHz OFDMA transmission for a single STA, large RUs are only allowed to be aggregated within the primary 160MHz or secondary 160MHz. For example, the primary 160MHz (channel) may include a primary 80MHz (channel) and a secondary 80MHz (channel). The secondary 160MHz (channel) may be configured by a channel other than the primary 160MHz.

[0373] According to an embodiment, in a 240 MHz OFDMA transmission of a single STA, large RUs may be allowed to be aggregated only within 160 MHz (band / channel), which may include two adjacent 80 MHz channels.

[0374] According to an embodiment, in 160+80 MHz OFDMA transmission for a single STA, large RUs may be aggregated only within continuous 160 MHz (band / channel) or within the remaining 80 MHz (band / channel).

[0375] In 160MHz OFDMA, aggregation of large RUs configured as shown in Table 21 can be supported.

[0376] [Table 21]

[0377] RU Size Aggregate BW Notes 484+996 120MHz 4 options

[0378] In 80MHz OFDMA, aggregation of large RUs configured as shown in Table 22 can be supported.

[0379] [Table 22]

[0380] RU Size Aggregate BW Notes 484+242 60MHz 4 options

[0381] In 80MHz non-OFDMA, aggregation of large RUs configured as shown in Table 23 can be supported. In 80MHz non-OFDMA, puncturing can be applied. For example, one of four 242RUs can be punctured.

[0382] [Table 23]

[0383] RU Size Aggregate BW Notes 484+242 60MHz 4 options

[0384] In 160MHz non-OFDMA, aggregation of large RUs configured as shown in Table 24 can be supported. In 160MHz non-OFDMA, puncturing can be applied. For example, one of eight 242RUs can be punctured. For another example, one of four 484RUs can be punctured.

[0385] [Table 24]

[0386] 80MHz RU size 80MHz RU size Aggregate BW Notes 484 996 120MHz 4 options 484+242 996 140MHz 8 options

[0387] In 240MHz non-OFDMA, aggregation of large RUs configured as shown in Table 25 can be supported. In 240MHz non-OFDMA, puncturing can be applied. For example, one of six 484RUs can be punctured. For another example, one of three 996RUs can be punctured.

[0388] [Table 25]

[0389] 80MHz RU size 80MHz RU size 80MHz RU size Aggregate BW Notes 484 996 996 200MHz 6 options - 996 996 160MHz 3 options

[0390] In 320MHz non-OFDMA, aggregation of large RUs configured as shown in Table 26 can be supported. In 320MHz non-OFDMA, puncturing can be applied. For example, one of eight 484RUs can be punctured. For another example, one of four 996RUs can be punctured.

[0391] [Table 26]

[0392]

[0393] The technical features related to the operation mode are described below.

[0394] According to an embodiment, a station (STA) supporting the EHT standard STA (hereinafter referred to as EHT STA) or a station supporting the EHT standard STA (hereinafter referred to as HE STA) can operate in a 20MHz channel width mode. In the 20MHz channel width mode, the EHTSTA can operate by reducing the operating channel width to 20MHz using an operation mode indication (OMI).

[0395] According to an embodiment, the EHT STA (or HE STA) may operate in a 20 MHz channel width mode. For example, in the 20 MHz channel width mode, the EHT STA may operate by reducing the operating channel width to 20 MHz using an operation mode indication (OMI).

[0396] According to an embodiment, the EHT STA may support subchannel selective transmission (SST). A station (STA) supporting SST may quickly select (and switch to) another channel between transmissions to cope with fading in a narrow subchannel.

[0397] The 802.11be standard (i.e., the EHT standard) can provide higher data rates than the 802.11ax standard. The EHT (i.e., Extremely High Throughput) standard can support wide bandwidth (up to 320MHz), 16 streams, and multi-band operation.

[0398] In addition, in the EHT standard, various preamble puncturing or multiple RU allocations can be supported in wide bandwidth (up to 320MHz) and SU / MU transmission. Therefore, in the following description, a method for configuring the EHT-SIG and a method for setting an interleaver for it when sending a signal through preamble puncturing can be proposed. First, the PPDU of the EHT standard (ie, the EHT PPDU) can be described.

[0399] EHT PPDU Configuration

[0400] In order to support the transmission method based on the EHT standard, a new frame format can be used. When sending signals through the 2.4 / 5 / 6 GHz band based on the new frame format, a traditional Wi-Fi receiver (or STA) (such as 802.11n) and a receiver supporting an EHT standard receiver compliant with the 802.11n / ac / ax standard can also receive EHT signals sent through the 2.4 / 5.6 GHz band.

[0401] The preamble of the PPDU based on the EHT standard can be set in various ways. An embodiment of configuring the PPDU preamble based on the EHT standard is described below. In the following, the PPDU based on the EHT standard may be described as an EHT PPDU. However, the EHT PPDU is not limited to the EHT standard. The EHT PPDU may include not only the 802.11be standard (ie, the EHT standard), but also a PPDU based on a new standard improved / developed / extended by the 802.11be standard.

[0402] Fig.24 An example of an EHT PPDU is shown.

[0403] refer to Fig.24 , the EHT PPDU 2400 may include an L-part 2410 and an EHT-part 2420. The EHT PPDU 2400 may be configured as a format that supports backward compatibility. In addition, the EHT PPDU 2400 may be sent to a single STA and / or multiple STAs. The EHT PPDU 2400 may be an example of a MU-PPDU of the EHT standard.

[0404] The EHT PPDU 2400 may include an L-part 2410 before the EHT-part 2420 for coexistence or backward compatibility with legacy STAs (e.g., STAs compliant with the 802.11n / ac / ax standard). For example, the L-part 2410 may include an L-STF, an L-LTF, and an L-SIG. For example, a phase rotation may be applied to the L-part 2410.

[0405] According to an embodiment, the EHT part 2420 may include RL-SIG, U-SIG 2421, EHT-SIG 2422, EHT-STF, EHT-LTF, and data fields. Similar to the 11ax standard, the RL-SIG may be included in the EHT part 2420 for L-SIG reliability and range extension. The RL-SIG may be sent immediately after the L-SIG and may be configured to repeat the L-SIG.

[0406] For example, four additional subcarriers may be applied to L-SIG and RL-SIG. The additional subcarriers may be configured at subcarrier indices [-28, -27, 27, 28]. The additional subcarriers may be modulated in a BPSK scheme. In addition, coefficients [-1 -1 -1 1] may be mapped to the additional subcarriers.

[0407] For example, the EHT-LTF may be one of 1x EHT-LTF, 2x EHT-LTF, or 4x EHT-LTF. The EHT standard may support EHT-LTF of 16 spatial streams.

[0408] According to an embodiment, U-SIG 2421 may include a version-independent field and a version-dependent field. Fig.25 Let's describe an example of U-SIG 2421.

[0409] Fig.25 An example of U-SIG is shown.

[0410] refer to Fig.25 , U-SIG 2500 can correspond to Fig.24 The U-SIG 2500 may include a version-independent field 2510 and a version-dependent field 2520.

[0411] According to an embodiment, the version-independent field 2510 may include a 3-bit version identifier indicating the EHT standard and a Wi-Fi version defined after the EHT standard. In other words, the version-independent field 2510 may include 3-bit information related to the EHT standard and a Wi-Fi version defined after the EHT standard.

[0412] According to an embodiment, the version-independent field 2510 may also include a 1-bit DL / UL field, a BSS color field, and / or a TXOP duration field. In other words, the version-independent field 2510 may also include 1-bit information related to DL / UL, information related to BSS color, and / or information related to TXOP duration.

[0413] According to an embodiment, the version-related field 2520 may include a field / information related to the PPDU format type, a field / information related to the bandwidth, and / or a field / information related to the MCS. For example, the field / information related to the bandwidth may include puncturing information.

[0414] According to an embodiment, U-SIG 2500 may include two symbols. The two symbols may be jointly encoded. According to an embodiment, for each 20 MHz, U-SIG 2500 may be configured with 52 data tones and 4 pilot tones. In addition, it may be modulated in the same manner as HE-SIG-A of the HE standard. For example, U-SIG 2500 may be modulated with BPSK and a code rate of 1 / 2.

[0415] According to an embodiment, the U-SIG 2500 can be configured by repetition in units of 20 MHz for wide bandwidth transmission.

[0416] According to an embodiment, when the U-SIG 2500 is transmitted to a plurality of users, MCS information of the EHT-SIG or information related to the number of symbols of the EHT-SIG may be further included.

[0417] Refer to Fig.24 , the EHT-SIG 2422 may include version-related fields not included in the U-SIG 2421. In other words, the EHT-SIG 2422 may include information overflowed from the U-SIG-2421. For example, the EHT-SIG 2422 may include information that depends on the PPDU version. As another example, the EHT-SIG 2422 may include at least some fields included in the High Efficiency (HE) standard HE-SIG-A.

[0418] According to an embodiment, the EHT-SIG 2422 may include a plurality of OFDM symbols. According to an embodiment, the EHT-SIG 2422 may be modulated by various MCSs. For example, the EHT-SIG 2422 may be modulated based on MCS0 to MCS5.

[0419] According to an embodiment, the EHT-SIG 2422 may include a common field and a user-specific field. For example, the common field may include information related to the spatial stream and / or information related to the RU allocation. For example, the user-specific field may include at least one user block field, and the at least one user block field includes information related to the user. The user-specific field may include / indicate information related to the information ID, MCS, and compilation for a specific user or STA. For example, the user-specific field may include at least one user block field.

[0420] Preamble perforation pattern and multiple RU combinations

[0421] In the EHT standard, various preamble puncturing patterns and multiple RU combinations may be used. Examples of preamble puncturing and multiple RU combinations may be described below.

[0422] In the following, an embodiment considering the primary channel 20MHz (i.e., P20) may be described. In this case, it may be assumed that P20 is the lowest 20MHz in the frequency domain. For example, it may be assumed that P20 is the first 20MHz channel (ch1) within 80MHz [ch1 ch2 ch3 ch4]. According to an embodiment, the pattern may be configured / set differently depending on the location of the primary channel.

[0423] In a bandwidth of 80 MHz, the preamble puncturing pattern may be configured / set as shown in Table 27.

[0424] [Table 27]

[0425] Aggregate BW RU combination 40 242+242 60 242+484，484+242

[0426] Referring to Table 27, 40MHz preamble puncturing can be performed in a bandwidth of 80MHz. In this case, the RU combination can be set to 242+242.

[0427] 20MHz preamble puncturing can be performed in 80MHz bandwidth, in which case the RU combination can be set to 242+484 or 484+242.

[0428] (2) In a bandwidth of 160 MHz, the preamble puncturing pattern may be configured / set as shown in Table 28.

[0429] [Table 28]

[0430] Aggregate BW RU combination 120 484+996 140 484+242+996

[0431] Referring to Table 28, 40MHz preamble puncturing can be performed in a bandwidth of 160MHz, in which case the RU combination can be set to 484+996.

[0432] 20MHz preamble puncturing can be performed in a bandwidth of 160MHz, in which case the RU combination can be set to 484+242+996.

[0433] (3) In a bandwidth of 240 MHz, the preamble puncturing pattern may be configured / set as shown in Table 29.

[0434] [Table 29]

[0435] Aggregate BW RU combination 160 996+996 200 484+996+996

[0436] Referring to Table 29, 80MHz of preamble puncturing can be performed in a bandwidth of 240MHz. In this case, the RU combination can be set to 996+996.

[0437] 40MHz preamble puncturing can be performed in a bandwidth of 240MHz, in which case the RU combination can be set to 484+996+996.

[0438] (4) In a bandwidth of 320 MHz, the preamble puncturing pattern may be configured / set as shown in Table 30.

[0439] [Table 30]

[0440] Aggregate BW RU combination 240 996+996+996 280 484+996+996+996

[0441] Referring to Table 30, 80MHz preamble puncturing can be performed in a bandwidth of 320MHz. In this case, the RU combination can be set to 996+996+996.

[0442] 40MHz preamble puncturing can be performed in a bandwidth of 320MHz, in which case the RU combination can be set to 484+996+996+966.

[0443] The above combination of RU aggregation and preamble puncturing is just an example, and more different combinations can be used to improve spectrum efficiency.

[0444] Configure EHT-SIG based on preamble puncturing pattern and multiple RU combinations

[0445] To support the above combined multiple RU aggregation / preamble puncturing, the EHT-SIG may be sent as shown below.

[0446] According to an embodiment, the EHT-SIG can be configured in units of 80 MHz. In this case, the EHT-SIG can be transmitted using the remaining RU / BW excluding the punctured portion.

[0447] 1-A. For a bandwidth greater than 80 MHz, the EHT-SIG may be configured to include independent information in units of 80 MHz.

[0448] For example, for 160 MHz, the EHT-SIG may be configured as two content channels (ie,

[12] ). That is, the EHT-SIG may be configured as content channel 1 and content channel 2.

[0449] For example, for 240 MHz, the EHT-SIG may be configured as three content channels (ie, [12 3]). In other words, the EHT-SIG may be configured as content channel 1, content channel 2, and content channel 3.

[0450] For example, for 320 MHz, the EHT-SIG may be configured as four content channels (ie, [12 3 4]). In other words, the EHT-SIG may be configured as content channel 1, content channel 2, content channel 3, and content channel 4.

[0451] 1-B. Considering various puncturing patterns within 80 MHz, the 80 MHz EHT-SIG content channel may be transmitted in the following structure. In the following, information about the 20 MHz allocated within 80 MHz may be represented as [x1 x2 x3 x4]. Here, x1 to x4 may be set to 1 or 0. When the corresponding 20 MHz channel is allocated, each of x1 to x4 may be set to 1. When the corresponding 20 MHz channel is not allocated, each of x1 to x4 may be set to 0. That is, "x1" may indicate whether the first 20 MHz is allocated within the 80 MHz bandwidth or whether the leading puncturing is applied.

[0452] 1-Bi.242+242 (i.e. [1 0 0 1], [1 0 1 0])

[0453] For example, for 80MHz, you can Fig.26 The EHT-SIG is sent as shown.

[0454] Fig.26 An example of the EHT-SIG of 80 MHz is shown.

[0455] refer to Fig.26 , preamble puncturing may be performed in a structure of [1 0 0 1]. EHT-SIG1 may be transmitted through the first 20 MHz and the last 20 MHz within 80 MHz.

[0456] 1-B-ii.242+484 (i.e. [1 0 1 1], [1 1 0 1], [1 1 1 0]) case

[0457] For example, for 80MHz, you can Fig. 27 The EHT-SIG is sent as shown.

[0458] Fig. 27 Another example of EHT-SIG at 80 MHz is shown.

[0459] refer to Fig. 27 , preamble puncturing may be performed in a structure of [1 0 1 1]. EHT-SIG1 may be transmitted through the first 20 MHz, the third 20 MHz, and the last 20 MHz within 80 MHz.

[0460] iii. In the above example, it can be assumed that the first 242 RUs (i.e., the 242 RUs of the lowest frequency band) are the primary channels. In this case, the 20 MHz for the allocated 242 RUs can be represented by 1. The 20 MHz corresponding to the punctured 242 RUs can be represented by 0.

[0461] iv. The above embodiments are exemplary, and the pattern display may be set differently according to the position of the main channel.

[0462] v. The remaining BW (configured in units of 20 MHz) except for the BW punctured within 80 MHz may be used to transmit the EHT-SIG.

[0463] vi. Depending on the puncturing pattern, 40 / 60 MHz may be used to transmit the EHT-SIG, and in this case, 52+52 / 52+108 data tones (excluding the data tones of the pilot) may be used to transmit the information, respectively. In this case, the EHT-SIG information bits carried in the data tones may be encoded by one BCC and one BCC interleaver.

[0464] For example, to interleave the information bits carried in 52+52 / 52+108 data tones, the Ncol and Nrow of the BCC interleaver may be set as shown in Table 31.

[0465] [Table 31]

[0466] 52+52 52+108 W / oDCM Ncol 13 32 / 20 / 16 Nrow 8 5 / 8 / 10 w / DCM Ncol 13 16 / 10 Nrow 4 5 / 8

[0467] Referring to Table 31, the values ​​of Ncol and Nrow may be set differently when DCM is applied (ie, w / DCM) and when DCM is not applied (ie, w / o DCM).

[0468] For example, when DCM is not applied in 52+52 tone, the value of Ncol can be set to 13 and the value of Nrow can be set to 8.

[0469] For example, when DCM is applied in 52+52 tone, the value of Ncol can be set to 13 and the value of Nrow can be set to 4.

[0470] For example, when DCM is not applied in 52+108 tones, the value of Ncol may be set to 32 and the value of Nrow may be set to 5.

[0471] For example, when DCM is not applied in 52+108 tones, the value of Ncol may be set to 20 and the value of Nrow may be set to 8.

[0472] For example, when DCM is not applied in 52+108 tones, the value of Ncol may be set to 16 and the value of Nrow may be set to 10.

[0473] For example, when DCM is applied in 52+108 tones, the value of Ncol may be set to 16 and the value of Nrow may be set to 5.

[0474] For example, when DCM is applied in 52+108 tones, the value of Ncol may be set to 10 and the value of Nrow may be set to 8.

[0475] 1-C. STA can check the puncturing pattern of EHT-SIG by using the information related to the puncturing pattern configured in units of 80 MHz or BW information of U-SIG.

[0476] 1-D. Different from the above embodiment, the EHT-SIG is configured in units of 80 MHz and can be transmitted in the following manner.

[0477] 1-Di. The EHT-SIG may be configured as a 20 MHz EHT-SIG content channel within 80 MHz. The content channel may be configured as follows.

[0478] 1-Di-1. Regardless of SU / MU PPDU, EHT-SIG may include common fields and user-specific fields. For example, content channels may be configured differently according to SU / MU. As an example, SU PPDU may include only common fields.

[0479] 1-Di-2. Two EHT-SIG content channels may exist on 80 MHz. For example, each content channel may include different information. In addition, the content channels may be repeated in units of 40 MHz within 80 MHz. Fig.28 The structure shown transmits two content channels.

[0480] Fig.28 Another example of EHT-SIG at 80 MHz is shown.

[0481] refer to Fig.28 , EHT-SIG can be configured as two content channels (EHT-SIG1 and EHT-SIG2). 80MHz can be divided into multiple 40MHz units. EHT-SIG1 and EHT-SIG2 can be sent through the first 40MHz. EHT-SIG1 and EHT-SIG2 can be sent through the second 40MHz. That is, it is possible to send two content channels by repeating in 80MHz in units of 40MHz.

[0482] 1-Di-3. When BW>80MHz, the EHT-SIG field can be configured as two different content channels per 80MHz.

[0483] 1-Di-3-a. For 160MHz, you can Fig.29 The EHT-SIG is sent in the structure shown.

[0484] Fig.29 An example of the EHT-SIG of 160 MHz is shown.

[0485] refer to Fig.29 , EHT-SIG can be configured as four content channels (EHT-SIG1 to EHT-SIG4). 160MHz can be divided into multiple 80MHz units. EHT-SIG1 and EHT-SIG2 can be sent through the first 80MHz. EHT-SIG1 and EHT-SIG2 can be sent by repetition within 80MHz in units of 40MHz.

[0486] The EHT-SIG3 and the EHT-SIG4 may be transmitted through the second 80 MHz. The EHT-SIG3 and the EHT-SIG4 can be transmitted by repetition within 80 MHz in units of 40 MHz.

[0487] 1-Di-3-b. For 240MHz, you can Fig.30 The EHT-SIG is sent in the structure shown.

[0488] Fig.30 An example of the EHT-SIG of 240 MHz is shown.

[0489] refer to Fig.30 , EHT-SIG can be configured as six content channels (EHT-SIG1 to EHT-SIG6). 240MHz can be divided into multiple 80MHz units. EHT-SIG1 and EHT-SIG2 can be sent through the first 80MHz. EHT-SIG1 and EHT-SIG2 can be sent by repetition within 80MHz in units of 40MHz.

[0490] The EHT-SIG3 and the EHT-SIG4 may be transmitted through the second 80 MHz. The EHT-SIG3 and the EHT-SIG4 can be transmitted by repetition within 80 MHz in units of 40 MHz.

[0491] The EHT-SIG5 and the EHT-SIG6 may be transmitted through the third 80 MHz. The EHT-SIG5 and the EHT-SIG6 can be transmitted by repetition within 80 MHz in units of 40 MHz.

[0492] 1-Di-3-c. For 320MHz, you can Fig.31 The EHT-SIG is sent in the structure shown.

[0493] Fig.31 An example of the EHT-SIG of 320 MHz is shown.

[0494] refer to Fig.31 , EHT-SIG can be configured as eight content channels (EHT-SIG1 to EHT-SIG8). 320MHz can be divided into multiple 80MHz units. EHT-SIG1 and EHT-SIG2 can be sent through the first 80MHz. EHT-SIG1 and EHT-SIG2 can be sent by repetition within 80MHz in units of 40MHz.

[0495] The EHT-SIG3 and the EHT-SIG4 may be transmitted through the second 80 MHz. The EHT-SIG3 and the EHT-SIG4 can be transmitted by repetition within 80 MHz in units of 40 MHz.

[0496] The EHT-SIG5 and the EHT-SIG6 may be transmitted through the third 80 MHz. The EHT-SIG5 and the EHT-SIG6 can be transmitted by repetition within 80 MHz in units of 40 MHz.

[0497] The EHT-SIG7 and the EHT-SIG8 may be transmitted through the fourth 80 MHz. The EHT-SIG7 and the EHT-SIG8 may be transmitted by repetition within 80 MHz in units of 40 MHz.

[0498] 1-D-ii. According to an embodiment, the EHT-SIG content channel / EHT-SIG field can be configured in units of 20 MHz. The EHT-SIG may be configured and transmitted as follows.

[0499] 1-D-ii-1. The EHT-SIG (or EHT-SIG content channel) may be transmitted by repeating in units of 20 MHz within 80 MHz.

[0500] 1-D-ii-1-a. For 80MHz, you can Fig.32 The EHT-SIG is sent in the structure shown.

[0501] Fig.32 Another example of EHT-SIG at 80 MHz is shown.

[0502] refer to Fig.32, the EHT-SIG may be configured as one content channel (EHT-SIG1). The EHT-SIG1 is configured on 20 MHz and may be transmitted by repeating in units of 20 MHz within 80 MHz.

[0503] 1-D-ii-2. According to an embodiment, the EHT-SIG (or an EHT-SIG content channel) can be differently configured in units of 80 MHz.

[0504] 1-D-ii-2-a. For 160MHz, you can Fig.33 The EHT-SIG is sent in the structure shown.

[0505] Fig.33 Another example of EHT-SIG at 160 MHz is shown.

[0506] refer to Fig.33 , the EHT-SIG can be configured as two content channels (EHT-SIG1 and EHT-SIG2). 160MHz can be divided into multiple 80MHz units.

[0507] The EHT-SIG1 may be transmitted through the first 80 MHz. The EHT-SIG1 is configured on 20 MHz and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0508] The EHT-SIG2 may be transmitted through the second 80 MHz. The EHT-SIG2 is configured on 20 MHz and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0509] 1-D-ii-2-b. For 240MHz, you can Fig.34 The EHT-SIG is sent in the structure shown.

[0510] Fig.34 Another example of EHT-SIG at 240 MHz is shown.

[0511] refer to Fig.34 , the EHT-SIG can be configured into three content channels (EHT-SIG1 to EHT-SIG3). 240MHz can be divided into multiple 80MHz units.

[0512] The EHT-SIG1 may be transmitted through the first 80 MHz. The EHT-SIG1 is configured on 20 MHz and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0513] The EHT-SIG2 may be transmitted through the second 80 MHz. The EHT-SIG2 is configured on 20 MHz and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0514] The EHT-SIG3 may be transmitted through the third 80 MHz. The EHT-SIG3 is configured on 20 MHz and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0515] 1-D-ii-2-c. For 320MH, you can Fig.35 The EHT-SIG is sent in the structure shown.

[0516] Fig.35 Another example of EHT-SIG at 320 MHz is shown.

[0517] refer to Fig.35 , the EHT-SIG can be configured into four content channels (EHT-SIG1 to EHT-SIG4). 320MHz can be divided into multiple 80MHz units.

[0518] The EHT-SIG1 may be transmitted through the first 80 MHz. The EHT-SIG1 is configured on 20 MHz and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0519] The EHT-SIG2 may be transmitted through the second 80 MHz. The EHT-SIG2 is configured on 20 MHz and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0520] The EHT-SIG3 may be transmitted through the third 80 MHz. The EHT-SIG3 is configured on 20 MHz, and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0521] The EHT-SIG4 may be transmitted through the fourth 80 MHz. The EHT-SIG4 is configured at 20 MHz, and may be transmitted by repetition in units of 20 MHz within 80 MHz.

[0522] 1-D-ii-3. Different from the above-described embodiment, during SU transmission, the EHT-SIG (or EHT-SIG content channel) can be transmitted by repetition in units of 20 MHz.

[0523] 1-D-ii-3-a. For example, Fig.36 The EHT-SIG (or EHT-SIG content channel) of 320 MHz is configured and transmitted as shown.

[0524] Fig.36 Another example of EHT-SIG at 320 MHz is shown.

[0525] refer to Fig.36 , the EHT-SIG may be configured as a content channel (ie, EHT-SIG1). The EHT-SIG1 is configured on 20 MHz and may be transmitted by repeating in units of 20 MHz within 320 MHz.

[0526] 1-D-ii-3-b. Fig.36 As shown, for 160 MHz and 240 MHz, the EHT-SIG can be configured and sent in the same manner.

[0527] 1-D-ii-4. According to the above embodiment, an existing interleaver can be used, thereby having an effect that there is no need to replace additional hardware.

[0528] 1-E. The EHT-SIG may be configured differently according to the SU PPDU and the MU PPDU.

[0529] For example, in case of SU transmission, the EHT-SIG may be configured as an EHT-SIG content channel of 20 MHz. The EHT-SIG may be transmitted by repetition in the transmission BW.

[0530] For another example, in the case of MU-PPDU, the EHT-SIG can be configured in units of every 80 MHz or every 160 MHz. In this case, it can be transmitted using two independent EHT-SIG content channels.

[0531] 1-Ei. Hereinafter, for 240 MHz transmission, a configuration example of EHT-SIG may be described. Here, 1, 2, 3, 4, 5, 6 may represent independent 20 MHz content channels.

[0532] 1-Ei-1. The EHT-SIG of the SU PPDU may have a structure of [1 1 1 1 1 1 1 1 1 1 1]. That is, in SU transmission, the EHT-SIG may be transmitted by repeating one content channel.

[0533] 1-Ei-2. The EHT-SIG of the MU PPDU may be configured as two content channels.

[0534] For example, when the EHT-SIG is configured for each 80 MHz, the EHT-SIG may be configured in a structure of [1 2 12 3 4 3 4 5 6 56].

[0535] For another example, when the EHT-SIG is configured for each 160 MHz, the EHT-SIG may be configured in a structure of [1 2 1 2 1 2 12 3 4 3 4].

[0536] 2. According to an embodiment, the EHT-SIG (or EHT-SIG content channel) can be configured in units of 20 MHz, and may be configured and transmitted as follows.

[0537] 2-A. For example, the EHT-SIG may be configured as an independent SIG including other information in units of 160 MHz, in which case the EHT-SIG constituting each 160 MHz may be configured as follows.

[0538] 2-Ai. The EHT-SIG may be configured as an EHT-SIG content channel (configured as 20 MHz within 80 MHz). The EHT-SIG content channel may be configured as two channels on 80 MHz. Each content channel may include different information. In addition, the two content channels may be repeated within 80 MHz in units of 40 MHz and transmitted according to the following structure.

[0539] 2-Ai-1. For example, for 80MHz, you can Fig.37 The EHT-SIG (or EHT-SIG content channel) is configured and sent as shown.

[0540] Fig.37 Another example of EHT-SIG at 80 MHz is shown.

[0541] refer to Fig.37 , EHT-SIG can be configured as two content channels (EHT-SIG1 and EHT-SIG2). 80MHz can be divided into multiple 40MHz units. EHT-SIG1 and EHT-SIG2 can be sent through the first 40MHz. EHT-SIG1 and EHT-SIG2 can be sent through the second 40MHz. That is, it is possible to send two content channels by repeating in 80MHz in units of 40MHz.

[0542] 2-Ai-2. For example, for 160MHz, you can Fig.38 The EHT-SIG (or EHT-SIG content channel) is configured and sent as shown.

[0543] Fig.38 Another example of EHT-SIG at 160 MHz is shown.

[0544] refer to Fig.38, EHT-SIG can be configured as two content channels (EHT-SIG1 and EHT-SIG2). 160MHz can be divided into multiple 80MHz units. EHT-SIG1 and EHT-SIG2 can be sent through the first 80MHz. EHT-SIG1 and EHT-SIG2 can be sent through the second 80MHz. That is, it is possible to send two content channels by repeating in 80MHz in units of 40MHz.

[0545] 2-Ai-3. When BW>160MHz, EHT-SIG can be configured differently in units of 160MHz. For example, two EHT-SIG content channels within 160MHz can include different information. These two content channels are repeated in units of 40MHz within 80MHz and can be configured as follows.

[0546] 2-Ai-2. For example, for 240MHz, you can Fig.39 The EHT-SIG (or EHT-SIG content channel) is configured and sent as shown.

[0547] Fig.39 Another example of EHT-SIG at 240 MHz is shown.

[0548] refer to Fig.39 , the EHT-SIG can be configured differently in units of 160 MHz.

[0549] Two content channels (ie, EHT-SIG1, EHT-SIG2) may be transmitted through the first 160 MHz of 240 MHz. The two content channels (ie, EHT-SIG1, EHT-SIG2) may be transmitted by repetition within 80 MHz (or 160 MHz) in units of 40 MHz.

[0550] In addition, two content channels (ie, EHT-SIG3, EHT-SIG4) can be transmitted through the remaining 80 MHz. Two content channels (ie, EHT-SIG3, EHT-SIG4) can be transmitted by repeating in 80 MHz in units of 40 MHz. Therefore, for 240 MHz, the EHT-SIG can be configured as four content channels.

[0551] 2-Ai-3. For example, for 320MHz, you can Fig.40 The EHT-SIG (or EHT-SIG content channel) is configured and sent as shown.

[0552] Fig.40 Another example of EHT-SIG for 320 MHz is shown.

[0553] refer to Fig.40 , the EHT-SIG can be configured differently in units of 160 MHz.

[0554] Two content channels (ie, EHT-SIG1 and EHT-SIG2) may be transmitted through the first 160 MHz of 320 MHz. The two content channels (ie, EHT-SIG1, EHT-SIG2) can be transmitted by repetition within 80 MHz (or 160 MHz) in units of 40 MHz.

[0555] In addition, two content channels (ie, EHT-SIG3, EHT-SIG4) can be transmitted through the second 160MHz. Two content channels (ie, EHT-SIG3, EHT-SIG4) can be transmitted by repeating in 80MHz (or 160MHz) in units of 40MHz. Therefore, for 320MHz, EHT-SIG can be configured as four content channels.

[0556] Hereinafter, operations of the transmitting STA and the receiving STA according to the above-described embodiment may be described.

[0557] Fig.41 is a flowchart for explaining the operation of the receiving STA.

[0558] refer to Fig.41 In step S4110, the receiving STA may receive a PPDU including a first signal field, a second signal field, and a data field. For example, the first signal field may include a U-SIG. For example, the second signal field may include an EHT-SIG.

[0559] According to an embodiment, the PPDU may be received based on the first bandwidth. For example, the PPDU may include an EHT PPDU. For example, the entire bandwidth of the PPDU may be set to the first bandwidth.

[0560] According to an embodiment, the first signal field may include information related to the EHT PPDU. For example, the first signal field may include information related to the PPDU version. In addition, the first signal field may include information related to the basic service set (BSS) color and / or information related to the transmission opportunity (TXOP).

[0561] For example, the first signal field may include three bits of information related to the version of the PPDU. The three bits of information about the version of the PPDU may include information indicating that the EHT PPDU is a PPDU configured based on the EHT standard. In addition, the three bits of information related to the PPDU version may include information for distinguishing PPDUs configured based on later versions of the 802.11be standard (i.e., the EHT standard). In other words, the three bits of information related to the version of the PPDU may include information for distinguishing a PPDU configured based on the EHT standard from a PPDU configured based on a new standard determined / generated / established after the EHT standard. That is, the three bits of information related to the version of the PPDU may include information indicating that the PPDU is a PPDU of the EHT standard or a PPDU of a later standard after the EHT standard.

[0562] According to an embodiment, the type of PPDU and the version of PPDU may be used separately. The type of PPDU may be used to distinguish PPDUs according to the EHT standard and standards before the EHT standard (e.g., 802.11n / ac / ax). On the other hand, the version of PPDU may be used to distinguish PPDUs according to the EHT standard and standards after the EHT standard. For example, the version of PPDU may be referred to differently. For example, the version of PPDU may be referred to as PHY version, packet version, packet identifier, and Wi-Fi version.

[0563] According to an embodiment, the first signal field may also include a first cyclic redundancy check (CRC) bit and a first tail bit associated with the first signal field. The first CRC bit may be used for valid checking of the receiving STA. For example, the first CRC bit may include 4 bits. For example, the first tail bit may include 6 bits.

[0564] According to an embodiment, the second signal field may be received continuously to the first signal field. For example, the first signal field may be received through two symbols. The second signal field may be received through at least one symbol continuous to the two symbols.

[0565] According to an embodiment, the PPDU may be configured to be sent to a single user. For example, the data field included in the PPDU may include only information sent to a single user. Therefore, the PPDU may be configured to be sent only to a receiving STA. For example, the data field included in the PPDU may include information sent only to a receiving STA.

[0566] In this case, the second signal field may be configured by repeating in units of the second bandwidth within the first bandwidth. For example, the second bandwidth may be set to 20 MHz.

[0567] For example, the second signal field may be configured as a content channel (hereinafter referred to as a first content channel). The first content channel may be configured by repeating in units of the second bandwidth within the first bandwidth. That is, the first content channel may be configured by repeating in units of 20 MHz within the first bandwidth (i.e., the entire / full bandwidth of the PPDU). Therefore, the first content channel may be configured in the same manner in units of 20 MHz within the entire bandwidth of the PPDU.

[0568] According to an embodiment, the second signal field may include a common field and a user-specific field. For example, the common field may include information overflowed from the first signal field. When the PPDU is configured to be sent to a single user, the user-specific field may only include subfields related to the single user.

[0569] In step S4120, the receiving STA may decode the PPDU based on the first signal field and the second signal field.

[0570] Different from the above embodiment, the PPDU can be configured to be sent to multiple users. In this case, the second signal field can be configured in units of 80 MHz. The second signal field can be configured as two content channels per 80 MHz.

[0571] For example, in a 160 MHz PPDU, 160 MHz may be divided into two 80 MHz packets.

[0572] In the first 80 MHz, the second signal field may be configured as a first content channel and a second content channel. Each of the first content channel and the second content channel may be configured on 20 MHz. The first content channel and the second content channel may be positioned in sequence within the first 80 MHz. That is, the second signal field may be positioned in the order of the first content channel, the second content channel, the first content channel, and the second content channel within the first 80 MHz.

[0573] In the second 80 MHz, the second signal field may be configured as a third content channel and a fourth content channel. Each of the third content channel and the fourth content channel may be configured on 20 MHz. The third content channel and the fourth content channel may be positioned in sequence within the second 80 MHz. That is, the second signal field may be positioned in the order of the third content channel, the fourth content channel, the third content channel, and the fourth content channel within the second 80 MHz.

[0574] Fig.42 is a flowchart for explaining the operation of the transmitting STA.

[0575] refer to Fig.42In step S4210, the transmitting STA may generate a PPDU including a first signal field, a second signal field, and a data field. For example, the PPDU may include an EHT PPDU. For example, the first signal field may include a U-SIG. For example, the second signal field may include an EHT-SIG.

[0576] According to an embodiment, the first signal field may include information related to the EHT PPDU. For example, the first signal field may include information related to the PPDU version. As an example, the first signal field may include three bits of information related to the version of the PPDU. In addition, the first signal field may include information related to the basic service set (BSS) color and / or information related to the transmission opportunity (TXOP).

[0577] According to an embodiment, the PPDU may be configured to be sent to a single user. For example, the data field included in the PPDU may include only information sent to a single user. Therefore, the PPDU may be configured to be sent only to a receiving STA. For example, the data field included in the PPDU may include information sent only to a receiving STA.

[0578] In this case, the second signal field may be configured by repeating in units of the second bandwidth within the first bandwidth. For example, the second bandwidth may be set to 20 MHz.

[0579] For example, the second signal field may be configured as a content channel (hereinafter referred to as a first content channel). The first content channel may be configured by repeating in units of the second bandwidth within the first bandwidth. That is, the first content channel may be configured by repeating in units of 20 MHz within the first bandwidth (i.e., the entire / full bandwidth of the PPDU). Therefore, the first content channel may be configured in the same manner in units of 20 MHz within the entire bandwidth of the PPDU.

[0580] According to an embodiment, the second signal field may include a common field and a user-specific field. For example, the common field may include information overflowed from the first signal field. When the PPDU is configured to be sent to a single user, the user-specific field may only include subfields related to the single user.

[0581] In step S4220, the transmitting STA may transmit the PPDU. According to an embodiment, the transmitting STA may transmit the PPDU including a first signal field, a second signal field, and a data field.

[0582] According to an embodiment, the PPDU may be transmitted based on the first bandwidth. For example, the entire bandwidth of the PPDU may be set to the first bandwidth.

[0583] According to an embodiment, the second signal field may be transmitted continuously with the first signal field. For example, the first signal field may be transmitted through two symbols. The second signal field may be transmitted through at least one symbol continuous with the two symbols.

[0584] Different from the above embodiment, the PPDU can be configured to be sent to multiple users. In this case, the second signal field can be configured in units of 80 MHz. The second signal field can be configured as two content channels per 80 MHz.

[0585] For example, in a 160 MHz PPDU, 160 MHz may be divided into two 80 MHz packets.

[0586] In the first 80 MHz, the second signal field may be configured as a first content channel and a second content channel. Each of the first content channel and the second content channel may be configured on 20 MHz. The first content channel and the second content channel may be positioned in sequence within the first 80 MHz. That is, the second signal field may be positioned in the order of the first content channel, the second content channel, the first content channel, and the second content channel within the first 80 MHz.

[0587] In the second 80 MHz, the second signal field may be configured as a third content channel and a fourth content channel. Each of the third content channel and the fourth content channel may be configured on 20 MHz. The third content channel and the fourth content channel may be positioned in sequence within the second 80 MHz. That is, the second signal field may be positioned in the order of the third content channel, the fourth content channel, the third content channel, and the fourth content channel within the second 80 MHz.

[0588] Therefore, the transmitting STA may transmit the PPDU configured to be transmitted to the above-mentioned multiple users to the receiving STA.

[0589] The technical features of the present specification described above can be applied to various devices and methods. Figure 1 and / or Fig.19 For example, the technical features of this specification described above may only be applicable to Figure 1 and / or Fig.19 For example, the technical features of the above-mentioned 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 based on Fig.19The processor 610 and the memory 620 of the present disclosure may be implemented. For example, the apparatus of the present disclosure may include: a processor; and a memory, the memory being coupled to the processor, wherein the processor is adapted to: receive a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field, wherein the PPDU is sent to a single user, wherein the PPDU is received based on a first bandwidth, wherein the second signal field is configured as a content channel, wherein the content channel is configured by repeating in units of the second bandwidth within the first bandwidth; and decode the PPDU based on the first signal field and the second signal field.

[0590] The technical features of this specification can be implemented based on a computer readable medium (CRM). For example, the CRM proposed in this specification can store instructions, and the instructions are based on being executed by at least one processor to perform operations, and the operations include: receiving a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field, wherein the PPDU is sent to a single user, wherein the PPDU is received based on a first bandwidth, wherein the second signal field is configured as a content channel, wherein a content channel is configured by repeating in units of the second bandwidth within the first bandwidth; and decoding the PPDU based on the first signal field and the second signal field.

[0591] The above technical features of this specification are applicable to various applications or business models. For example, the above technical features can be applied to wireless communications of devices supporting artificial intelligence (AI).

[0592] Artificial intelligence refers to the field of study regarding artificial intelligence or methods of creating artificial intelligence, while machine learning refers to the field of study regarding methods of defining and solving various problems in the field of artificial intelligence. Machine learning is also defined as algorithms that improve the performance of operations through stable experience of operations.

[0593] An artificial neural network (ANN) is a model used in machine learning and may refer to an overall problem-solving model that includes artificial neurons (nodes) that form a network by combining synapses. An artificial neural network may be defined by the connection pattern between neurons in different layers, a learning process that updates model parameters, and an activation function that generates an output value.

[0594] The 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 neurons. In the artificial neural network, each neuron may output a function value of an activation function of an input signal, a weight, and a bias input through the synapse.

[0595] Model parameters refer to parameters determined by learning and include weights of synaptic connections and biases of neurons. Hyperparameters refer to parameters set in a machine learning algorithm prior to learning and include learning rate, number of iterations, mini-batch size, and initialization function.

[0596] Learning an artificial neural network can be aimed at determining model parameters for minimizing a loss function. The loss function can be used as an index for determining the optimized model parameters during learning an artificial neural network.

[0597] Machine learning can be categorized into supervised learning, unsupervised learning, and reinforcement learning.

[0598] Supervised learning refers to a method of training an artificial neural network when labels are given for training data, wherein the labels may indicate the correct answer (or result value) that the artificial neural network needs to infer when the training data is input to the artificial neural network. Unsupervised learning may refer to a method of training an artificial neural network when no labels are given for training data. Reinforcement learning may refer to a training method of an agent defined in a training environment to select actions or action sequences to maximize the cumulative reward in each state.

[0599] Machine learning implemented using a deep neural network (DNN) including multiple hidden layers in an artificial neural network is called deep learning, and deep learning is a part of machine learning. Hereinafter, machine learning is explained as including deep learning.

[0600] The above technical features can be applied to wireless communication of robots.

[0601] A robot may refer to a machine that automatically processes or operates a given task with its own capabilities. Specifically, a robot that has the function of recognizing an environment and autonomously making judgments to perform operations may be referred to as an intelligent robot.

[0602] Robots can be classified into industrial, medical, household, military robots, etc. according to their uses or fields. Robots can include actuators or drives, which include motors to perform various physical operations (e.g., move robot joints). In addition, mobile robots can include wheels, brakes, propellers, etc. in the drive to travel on the ground or fly in the air through the drive.

[0603] The above technical features can be applied to devices supporting extended reality.

[0604] Extended reality refers collectively to virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology is a computer graphics technology that provides real-world objects and backgrounds only in CG images, AR technology is a computer graphics technology that provides virtual CG images on real object images, and MR technology is a computer graphics technology that provides virtual objects mixed and combined with the real world.

[0605] MR technology is similar to AR technology in that real objects and virtual objects are displayed together. However, in AR technology, virtual objects are used as a supplement to real objects, while in MR technology, virtual objects and real objects are used as equal.

[0606] XR technology may be applied to head mounted displays (HMDs), heads up displays (HUDs), mobile phones, tablet PCs, laptop computers, desktop computers, TVs, digital signage, etc. Devices to which XR technology is applied may be referred to as XR devices.

[0607] The claims described in this specification can be combined in various ways. For example, the technical features of the method claims of this specification can be combined to be implemented as a device, and the technical features of the device claims of this specification can be combined to be implemented by a method. In addition, the technical features of the method claims of this specification and the technical features of the device claims can be combined to be implemented as a device, and the technical features of the method claims of this specification and the technical features of the device claims can be combined to be implemented by a method.

Claims

1. A method in a receiving station STA of a wireless local area network WLAN, the method comprising: receiving a physical layer protocol data unit PPDU including a universal signal U-SIG field, an extremely high throughput signal EHT-SIG field and a data field, The EHT-SIG field is continuous with the U-SIG field. The U-SIG field includes a version-independent field and a version-dependent field. The version-independent field includes a version identifier having a length of 3 bits. Wherein, the U-SIG field is received via two symbols, Wherein, the PPDU is sent to a single user, Wherein, the EHT-SIG field is configured as a content channel, wherein the one content channel is configured by repeating in units of 20 MHz, wherein information about preamble puncturing applied to the PPDU within 80 MHz is indicated as [x1 x2 x3 x4], each of x1, x2, x3, and x4 indicates whether preamble puncturing is applied on the corresponding 20 MHz channel, each of x1, x2, x3, and x4 is set to 0 or 1, and for the corresponding 20 MHz channel that is punctured, each of x1, x2, x3, and x4 is set to 0, and information about preamble puncturing is included in the U-SIG field; and The PPDU is decoded based on the U-SIG field and the EHT-SIG field.

2. The method according to claim 1, wherein: The U-SIG field includes two bits of information regarding whether the PPDU is transmitted to the single user.

3. The method according to claim 1, wherein: The EHT-SIG field includes a common field and a user-specific field.

4. The method according to claim 1, wherein: The EHT-SIG field is received through at least one symbol.

5. The method according to claim 1, wherein: The U-SIG field includes two bits of information regarding whether the PPDU is configured to be transmitted to the single user.

6. The method according to claim 1, wherein: The data field includes information to be sent to the single user.

7. A method in a sending station STA of a wireless local area network WLAN, the method comprising: generating a physical layer protocol data unit (PPDU) including a universal signal U-SIG field, an extremely high throughput signal EHT-SIG field, and a data field, The EHT-SIG field is continuous with the U-SIG field. The U-SIG field includes a version-independent field and a version-dependent field. The version-independent field includes a version identifier having a length of 3 bits. Wherein, the U-SIG field is sent through two symbols, Wherein, the PPDU is sent to a single user, Wherein, the EHT-SIG field is configured as a content channel, wherein the one content channel is configured by repeating in units of 20 MHz, wherein information about preamble puncturing applied to the PPDU within 80 MHz is indicated as [x1 x2 x3 x4], each of x1, x2, x3, and x4 indicates whether preamble puncturing is applied on the corresponding 20 MHz channel, each of x1, x2, x3, and x4 is set to 0 or 1, and for the corresponding 20 MHz channel that is punctured, each of x1, x2, x3, and x4 is set to 0, and information about preamble puncturing is included in the U-SIG field; and The PPDU is sent.

8. The method according to claim 1, wherein: The transmitting STA is further configured to perform the steps of the method according to any one of claims 2 to 6.

9. A receiving station STA in a wireless local area network WLAN, comprising: a transceiver adapted to transmit and / or receive wireless signals; a processor coupled to the transceiver, Wherein, the processor is adapted to: receiving a physical layer protocol data unit PPDU including a universal signal U-SIG field, an extremely high throughput signal EHT-SIG field and a data field, The EHT-SIG field is continuous with the U-SIG field. The U-SIG field includes a version-independent field and a version-dependent field. The version-independent field includes a version identifier having a length of 3 bits. Wherein, the U-SIG field is received via two symbols, Wherein, the PPDU is sent to a single user, Wherein, the EHT-SIG field is configured as a content channel, wherein the one content channel is configured by repeating in units of 20 MHz, wherein information about preamble puncturing applied to the PPDU within 80 MHz is indicated as [x1 x2 x3 x4], each of x1, x2, x3, and x4 indicates whether preamble puncturing is applied on the corresponding 20 MHz channel, each of x1, x2, x3, and x4 is set to 0 or 1, and for the corresponding 20 MHz channel that is punctured, each of x1, x2, x3, and x4 is set to 0, and information about preamble puncturing is included in the U-SIG field; and The PPDU is decoded based on the U-SIG field and the EHT-SIG field.

10. The receiving STA according to claim 1, wherein: The processor is further adapted to perform the steps of the method according to any one of claims 2 to 6.

11. A sending station STA in a wireless local area network WLAN, comprising: a transceiver adapted to transmit and / or receive wireless signals; a processor coupled to the transceiver, Wherein, the processor is adapted to: generating a physical layer protocol data unit PPDU including a universal signal U-SIG field, an extremely high throughput signal EHT-SIG field and a data field, The EHT-SIG field is continuous with the U-SIG field. The U-SIG field includes a version-independent field and a version-dependent field. The version-independent field includes a version identifier having a length of 3 bits. Wherein, the U-SIG field is sent through two symbols, Wherein, the PPDU is sent to a single user, Wherein, the EHT-SIG field is configured as a content channel, wherein the one content channel is configured by repeating in units of 20 MHz, wherein information about preamble puncturing applied to the PPDU within 80 MHz is indicated as [x1 x2 x3 x4], each of x1, x2, x3, and x4 indicates whether preamble puncturing is applied on the corresponding 20 MHz channel, each of x1, x2, x3, and x4 is set to 0 or 1, and for the corresponding 20 MHz channel that is punctured, each of x1, x2, x3, and x4 is set to 0, and information about preamble puncturing is included in the U-SIG field; and The PPDU is sent.

12. The transmitting STA according to claim 11, wherein: The processor is further adapted to perform the steps of the method according to any one of claims 2 to 6.

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