Techniques for constructing preambles in wireless communication systems

Abstract

To provide a method for configuring a signal field in a preamble in a wireless LAN system and an apparatus supporting the same.SOLUTION: According to various embodiments, a receiving STA receives a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field. The PPDU is configured to be transmitted to a single user. The second signal field is configured as one content channel, and the one content channel is configured by being replicated in a second bandwidth unit within a first bandwidth.SELECTED DRAWING: Figure 36

Description

[Technical Field]

[0001] The present specification relates to a technique for configuring a preamble in a wireless LAN system, and more particularly to a method for configuring a signal field of a preamble in a wireless LAN system and an apparatus supporting the same. [Background technology]

[0002] WLAN (wireless local area network) has been improved in various ways, for example, the IEEE 802.11ax standard proposed an improved communication environment using orthogonal frequency division multiple access (OFDMA) and downlink multi-user multiple input, multiple output (DL MU MIMO) techniques.

[0003] This specification proposes technical features that can be utilized in a new communication standard. For example, the new communication standard may be the Extreme High Throughput (EHT) standard, which has recently been under discussion. The EHT standard may use newly proposed increased bandwidth, improved PHY layer protocol data unit (PPDU) structure, improved sequences, Hybrid Automatic Repeat Request (HARQ) techniques, etc. The EHT standard may be referred to as the IEEE 802.11be standard. Summary of the Invention [Problem to be solved by the invention]

[0004] The EHT standard may use wide bandwidth (eg, 160 / 320 MHz), 16 streams, and / or multi-link (or multi-band) operation to support high throughput and high data rates.

[0005] In the EHT standard, wide bandwidth (e.g., 160 / 240 / 320 MHz) can be used for high throughput, and preamble puncturing and multiple RU transmission can be used to efficiently use bandwidth.

[0006] When transmitting EHT PPDU using wide bandwidth (for example, 160 / 240 / 320 MHz), an EHT SIG transmission method that takes into consideration preamble puncturing / multiple RU allocation, etc., and a corresponding BCC interleaver configuration can be proposed. [Means for solving the problem]

[0007] According to various embodiments, a receiving STA receives a PPDU (Physical layer Protocol Data Unit) including a first signal field, a second signal field, and a data field, the PPDU being configured to be transmitted to a single user, the PPDU being received based on a first bandwidth, the second signal field being configured as one content channel, and the one content channel being configured by being replicated in second bandwidth units within the first bandwidth, and a step of decoding the PPDU based on the first signal field and the second signal field. [Effects of the Invention]

[0008] According to various embodiments, preamble puncturing and multiple RUs can be used, which has the advantage of enabling efficient use of bandwidth.

[0009] According to various embodiments, the signal field (e.g., EHT-SIG) of the EHT PPDU can be duplicated and transmitted in units of a specific bandwidth. Therefore, the receiving STA can check the information contained in the signal field by checking only a specific bandwidth, without checking the signal field of the entire bandwidth of the EHT PPDU.

[0010] According to one embodiment, the interleaver defined in the conventional standard can be reused, which has the advantage of eliminating the need for additional hardware modifications. [Brief explanation of the drawings]

[0011] [Figure 1] 1 illustrates an example of a transmitting device and / or a receiving device of the present specification. [Figure 2] FIG. 1 is a conceptual diagram showing the structure of a wireless RAN (WLAN). [Figure 3] FIG. 1 is a diagram illustrating a general link setup process. [Figure 4] FIG. 1 is a diagram illustrating an example of a PPDU used in the IEEE standard. [Figure 5] A diagram showing the arrangement of resource units RU used on a 20 MHz band. [Figure 6] A diagram showing the arrangement of resource units RU used on the 40 MHz band. [Figure 7] A diagram showing the arrangement of resource units RU used on the 80 MHz band. [Figure 8] The structure of the HE-SIG-B field is shown below. [Figure 9] An example is shown in which multiple user STAs are assigned to the same RU using the MU-MIMO technique. [Figure 10] This shows the operation with UL-MU. [Figure 11] 1 shows an example of a trigger frame. [Figure 12] 1 shows an example of a common information field of a trigger frame. [Figure 13] An example of subfields included in the per user information field is shown below. [Figure 14] The technical features of the UORA technique are explained. [Figure 15] An example of channels used / supported / defined within the 2.4 GHz band is shown below. [Figure 16] 1 illustrates an example of channels used / supported / defined within the 5 GHz band. [Figure 17] 1 illustrates an example of channels used / supported / defined within the 6 GHz band. [Figure 18] 1 shows an example of a PPDU used in this specification. [Figure 19] 1 illustrates a modified example of the transmitting device and / or receiving device of the present specification. [Figure 20] An example of HE-PPDU is shown below. [Figure 21] An example of a combination of RU26 and RU52 at 20MHz is shown below. [Figure 22] An example of a combination of RU26 and RU52 at 40MHz is shown below. [Figure 23] An example of a combination of RU26 and RU52 at 80MHz is shown below. [Figure 24] An example of an EHT PPDU is shown below. [Figure 25] Here is an example of U-SIG. [Figure 26] An example of EHT-SIG at 80MHz is shown below. [Figure 27] Another example of EHT-SIG at 80MHz is shown below. [Figure 28] Another example of EHT-SIG at 80MHz is shown below. [Figure 29] An example of EHT-SIG at 160MHz is shown below. [Figure 30] An example of EHT-SIG at 240MHz is shown below. [Figure 31] An example of EHT-SIG at 320MHz is shown below. [Figure 32]Another example of EHT-SIG at 80MHz is shown below. [Figure 33] Another example of EHT-SIG at 160MHz is shown below. [Figure 34] Another example of EHT-SIG at 240MHz is shown below. [Figure 35] Another example of EHT-SIG at 320MHz is shown below. [Figure 36] Another example of EHT-SIG at 320MHz is shown below. [Figure 37] Another example of EHT-SIG at 80MHz is shown below. [Figure 38] Another example of EHT-SIG at 160MHz is shown below. [Figure 39] Another example of EHT-SIG at 240MHz is shown below. [Figure 40] Another example of EHT-SIG at 320MHz is shown below. [Figure 41] 10 is a flowchart illustrating the operation of a receiving STA. [Figure 42] 10 is a flowchart illustrating the operation of a transmitting STA. DETAILED DESCRIPTION OF THE INVENTION

[0012] As used herein, "A or B" can mean "A only," "B only," or "both A and B." In other words, as used herein, "A or B" can be interpreted as "A and / or B." For example, as used herein, "A, B, or C" can mean "A only," "B only," "C only," or "any combination of A, B, and C."

[0013] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Thus, "A / B" can mean "A only," "B only," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0014] As used herein, "at least one of A and B" can mean "A only," "B only," or "both A and B." Furthermore, as used herein, the expressions "at least one of A or B" and "at least one of A and / or B" can be interpreted in the same way as "at least one of A and B."

[0015] Furthermore, in this specification, "at least one of A, B, and C" can mean "A only," "B only," "C only," or "any combination of A, B, and C." Furthermore, "at least one of A, B, or C" or "at least one of A, B, and / or C" can mean "at least one of A, B, and C."

[0016] Furthermore, parentheses used in this specification may mean "for example." Specifically, when "control information (EHT-Signal)" is used, it may mean that "EHT-Signal" has been proposed as an example of "control information." In other words, "control information" in this specification is not limited to "EHT-Signal," and it may mean that "EHT-Signal" has been proposed as an example of "control information." Furthermore, when "control information (i.e., EHT-signal)" is used, it may mean that "EHT-signal" has been proposed as an example of "control information."

[0017] Technical features individually described in one drawing in this specification can be realized individually or simultaneously.

[0018] The following example of the present specification may be applied to various wireless communication systems. For example, the following example of the present specification may be applied to a wireless local area network (WLAN) system. For example, the present specification may be applied to the IEEE 802.11a / g / n / ac standard or the IEEE 802.11ax standard. The present specification may also be applied to the newly proposed EHT standard or the IEEE 802.11be standard. The present specification may also be applied to a new wireless RAN standard that is an enhancement of the EHT standard or the IEEE 802.11be. The present specification may also be applied to a mobile communication system. For example, the present specification may be applied to a mobile communication system based on LTE (Long Term Evolution) and its evolution based on the 3GPP (3rd Generation Partnership Project) standard. The present specification may also be applied to a 5G NR standard communication system based on the 3GPP standard.

[0019] In order to explain the technical features of the present specification, the technical features to which the present specification can be applied will be explained below.

[0020] FIG. 1 shows an example of a transmitting device and / or a receiving device of this specification.

[0021] The example of FIG. 1 can implement various technical features described below. FIG. 1 relates to at least one STA (station). For example, the STA (110, 120) herein may be referred to by various names such as a mobile terminal, a wireless device, a wireless transmit / receive unit (WTRU), a user equipment (UE), a mobile station (MS), a mobile subscriber unit, or simply a user. The STA (110, 120) herein may be referred to by various names such as a network, a base station, a Node-B, an access point (AP), a repeater, a router, a relay, etc. The STA (110, 120) herein may be referred to by various names such as a receiving device, a transmitting device, a receiving STA, a transmitting STA, a receiving device, a transmitting device, etc.

[0022] For example, the STAs (110, 120) can act as either an access point (AP) or a non-AP. That is, the STAs (110, 120) in this specification can perform the functions of an AP and / or a non-AP. In this specification, an AP may also be referred to as an AP STA.

[0023] The STAs (110, 120) of the present specification may support various communication standards other than the IEEE 802.11 standard. For example, they may support communication standards according to the 3GPP standard (e.g., LTE, LTE-A, 5G NR standard). The STAs of the present specification may be implemented in various devices such as mobile phones, vehicles, and personal computers. The STAs of the present specification may support communication for various communication services such as voice calls, video calls, data communications, and self-driving and autonomous driving.

[0024] As used herein, the STAs (110, 120) may include a medium access control (MAC) and physical layer interface to the wireless medium in accordance with the IEEE 802.11 standard.

[0025] The STAs (110, 120) will be described below based on sub-figure (a) of FIG.

[0026] The first STA (110) may include a processor 111, a memory 112, and a transceiver 113. The illustrated processor, memory, and transceiver may each be implemented on a separate chip, or at least two or more of the above blocks / functions may be implemented on a single chip.

[0027] The transceiver 113 of the first STA transmits and receives signals, specifically, IEEE 802.11 packets (for example, IEEE 802.11a / b / g / n / ac / ax / be, etc.).

[0028] For example, the first STA (110) can perform the intended operation of the AP. For example, the processor 111 of the AP can receive signals via the transceiver 113, process the received signals, generate transmission signals, and perform control for signal transmission. The memory 112 of the AP can store signals received via the transceiver 113 (i.e., received signals) and can store signals to be transmitted via the transceiver (i.e., transmitted signals).

[0029] For example, the second STA (120) can perform the intended operations of a non-AP STA. For example, the non-AP transceiver 123 can transmit and receive signals. Specifically, it can transmit and receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be, etc.).

[0030] For example, the processor 121 of the non-AP STA can receive signals via the transceiver 123, process the received signals, generate transmission signals, and perform control for signal transmission. The memory 122 of the non-AP STA can store signals received via the transceiver 123 (i.e., received signals) and can store signals to be transmitted via the transceiver (i.e., transmitted signals).

[0031] For example, in the following specification, the operation of the device represented by AP can be performed by the first STA (110) or the second STA (120). For example, if the first STA (110) is an AP, the operation of the device represented by AP can be controlled by the processor 111 of the first STA (110), and related signals can be transmitted or received via the transceiver 113 controlled by the processor 111 of the first STA (110). Also, control information related to the operation of the AP and the transmitted / received signals of the AP can be stored in the memory 112 of the first STA (110). Also, if the second STA (110) is an AP, the operation of the device represented by AP can be controlled by the processor 121 of the second STA (120), and related signals can be transmitted or received via the transceiver 123 controlled by the processor 121 of the second STA (120). Additionally, control information related to the operation of the AP and the AP's transmission / reception signals can be stored in the memory 122 of the second STA (110).

[0032] For example, in the following specification, the operation of a device indicated as non-AP (or User-STA) can be performed by 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 non-AP can be controlled by the processor 121 of the second STA (120), and related signals can be transmitted or received via 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 and AP transmission / reception signals can 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 non-AP can be controlled by the processor 111 of the first STA (110), and related signals can be transmitted or received via the transceiver 113 controlled by the processor 111 of the first STA (120). In addition, control information related to the operation of the non-AP and the AP's transmission / reception signals can be stored in the memory 112 of the first STA (110).

[0033] In the following description, devices referred to as a (transmitting / receiving) STA, a first STA, a second STA, STA1, STA2, an AP, a first AP, a second AP, AP1, AP2, a (transmitting / receiving) terminal, a (transmitting / receiving) device, a (transmitting / receiving) apparatus, a network, etc. may refer to the STAs (110, 120) in Figure 1. For example, devices referred to as a (transmitting / receiving) STA, a first STA, a second STA, STA1, STA2, an AP, a first AP, a second AP, AP1, AP2, a (transmitting / receiving) terminal, a (transmitting / receiving) device, a (transmitting / receiving) apparatus, a network, etc. without specific reference numerals may also refer to the STAs (110, 120) in Figure 1. For example, in the following example, the operations of various STAs transmitting and receiving signals (e.g., PPPDUs) may be performed by transceivers 113, 123 in Figure 1. In the following example, various STAs may generate transmission / reception signals or perform data processing or calculations in advance for transmission / reception signals by using processors 111 and 121 in FIG. 1. For example, examples of operations for generating transmission / reception signals or performing data processing or calculations in advance for transmission / reception signals may include: 1) operations for determining / obtaining / configuring / calculating / decoding / encoding bit information for subfields (SIG, STF, LTF, Data) included in a PPDU; 2) operations for determining / configuring / obtaining time resources and frequency resources (e.g., subcarrier resources) used for subfields (SIG, STF, LTF, Data) included in a PPDU; 3) operations for determining / configuring / obtaining specific sequences (e.g., pilot sequences, STF / LTF sequences, extra sequences applied to SIG) used for subfields (SIG, STF, LTF, Data) included in a PPDU; 4) operations for power control and / or power saving applied to the STAs; and 5) operations for determining / obtaining / configuring / calculating / decoding / encoding an ACK signal.In addition, in the following example, various information (e.g., information related to fields / subfields / control fields / parameters / power, etc.) used by various STAs to determine / acquire / configure / calculate / decode / encode transmitted / received signals can be stored in memories 112, 122 of FIG. 1.

[0034] The device / STA of the above-mentioned sub-figure (a) of Fig. 1 can be modified as shown in sub-figure (b) of Fig. 1. Hereinafter, the STA (110, 120) of this specification will be described based on sub-figure (b) of Fig. 1.

[0035] For example, the transceivers 113 and 123 shown in sub-drawing (b) of Figure 1 can perform the same functions as the transceivers shown in sub-drawing (a) of Figure 1 described above. For example, the processing chips 114 and 124 shown in sub-drawing (b) of Figure 1 can include processors 111 and 121 and memories 112 and 122. The processors 111 and 121 and memories 112 and 122 shown in sub-drawing (b) of Figure 1 can perform the same functions as the processors 111 and 121 and memories 112 and 122 shown in sub-drawing (a) of Figure 1 described above.

[0036] In the following description, a mobile terminal, a wireless device, a wireless transmit / receive unit (WTRU), a user equipment (UE), a mobile station (MS), a mobile subscriber unit, a user, a user STA, a network, a base station, a Node-B, an access point (AP), a repeater, a router, a relay, a receiving device, a transmitting device, a receiving STA, a transmitting STA, a receiving device, a transmitting apparatus, and / or a transmitting apparatus may refer to the STAs (110, 120) shown in sub-drawing (a) / (b) of Fig. 1 or the processing chips 114, 124 shown in sub-drawing (b) of Fig. 1. That is, the technical features of this specification may be performed by the STAs (110, 120) shown in sub-drawing (a) / (b) of Fig. 1, or may be performed only by the processing chips 114, 124 shown in sub-drawing (b) of Fig. 1. For example, the technical feature of a transmitting STA transmitting a control signal can be understood as a technical feature of a control signal generated by processors 111 and 121 shown in sub-drawings (a) and (b) of Fig. 1 being transmitted via transceivers 113 and 123 shown in sub-drawings (a) and (b) of Fig. 1. Alternatively, the technical feature of a transmitting STA transmitting a control signal can be understood as a technical feature of a control signal transmitted to transceivers 113 and 123 being generated by processing chips 114 and 124 shown in sub-drawing (b) of Fig. 1.

[0037] For example, the technical feature of the receiving STA receiving a control signal can be understood as the technical feature of the control signal being received by the transceivers 113 and 123 shown in sub-drawing (a) of Fig. 1. Alternatively, the technical feature of the receiving STA receiving a control signal can be understood as the technical feature of the control signal received by the transceivers 113 and 123 shown in sub-drawing (a) of Fig. 1 being acquired by the processors 111 and 121 shown in sub-drawing (a) of Fig. 1. Alternatively, the technical feature of the receiving STA receiving a control signal can be understood as the technical feature of the control signal received by the transceivers 113 and 123 shown in sub-drawing (b) of Fig. 1 being acquired by the processing chips 114 and 124 shown in sub-drawing (b) of Fig. 1.

[0038] 1, software code 115, 125 may be provided within memory 112, 122. Software code 115, 125 may include instructions that control the operation of processor 111, 121. Software code 115, 125 may be included in a variety of programming languages.

[0039] 1 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, the processor 111, 121 or the processing chip 114, 124 may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), and a modem (modulator and demodulator). For example, the processors 111, 121 or processing chips 114, 124 shown in FIG. 1 may be a SNAPDRAGON™ series processor manufactured by Qualcomm®, an EXYNOS™ series processor manufactured by Samsung®, an A series processor manufactured by Apple®, a HELIO™ series processor manufactured by MediaTek®, an ATOM™ series processor manufactured by INTEL®, or an enhanced processor thereof.

[0040] In this specification, an uplink may refer to a link for communication from a non-AP STA to an AP STA, and uplink PPDUs / packets / signals, etc. may be transmitted via the uplink. Also, in this specification, a downlink may refer to a link for communication from an AP STA to a non-AP STA, and downlink PPDUs / packets / signals, etc. may be transmitted via the downlink.

[0041] FIG. 2 is a conceptual diagram showing the structure of a wireless RAN (WLAN).

[0042] The top of Figure 2 shows the structure of an IEEE (Institute of Electrical and Electronic Engineers) 802.11 infrastructure basic service set (BSS).

[0043] Referring to the top of Figure 2, a wireless RAN system may include one or more infrastructure BSSs (200, 205) (hereinafter referred to as BSSs). A BSS (200, 205) is a collection of APs and STAs, such as an access point (AP) 225 and a station (STA1) 200-1, that can successfully synchronize and communicate with each other, and does not refer to a specific area. A BSS (205) may also include one AP (230) and one or more STAs (205-1, 205-2) that can be joined.

[0044] The BSS may include at least one STA, APs (225, 230) that provide a distribution service, and a distribution system (DS, 210) that connects multiple APs.

[0045] The distributed system 210 can realize an extended service set (ESS, 240) by connecting several BSSs (200, 205). The ESS (240) can be used as a term to indicate a network formed by connecting one or more APs via the distributed system 210. The APs included in one ESS (240) can have the same service set identification (SSID).

[0046] The portal (220) can act as a bridge between the wireless RAN network (IEEE 802.11) and other networks (e.g., 802.X).

[0047] In the BSS shown at the top of Figure 2, a network between APs (225, 230) and a network between APs (225, 230) and STAs (200-1, 205-1, 205-2) can be realized. However, it may also be possible to establish a network between STAs without APs (225, 230) and communicate with each other. A network that establishes a network between STAs without APs (225, 230) and communicates with each other is defined as an ad-hoc network or an independent basic service set (IBSS).

[0048] The bottom of Figure 2 is a conceptual diagram showing the IBSS.

[0049] Referring to the bottom of Figure 2, an IBSS is a BSS that operates in ad-hoc mode. Since an IBSS does not include an AP, there is no centralized management entity. That is, in an IBSS, STAs (250-1, 250-2, 250-3, 255-4, 255-5) are managed in a distributed manner. In an IBSS, all STAs (250-1, 250-2, 250-3, 255-4, 255-5) may be mobile STAs, and connection to a distributed system is not permitted, forming a self-contained network.

[0050] FIG. 3 is a diagram illustrating a general link setup process.

[0051] In step S310 shown in the figure, the STA may perform a network discovery operation. The network discovery operation may include a scanning operation by the STA. That is, in order for the STA to access a network, it must search for a joinable network. Before joining a wireless network, the STA must identify a compatible network. The process of identifying networks present in a specific area is called scanning. Scanning methods include active scanning and passive scanning.

[0052] FIG. 3 illustrates an exemplary network discovery operation including an active scanning process. A STA performing active scanning transmits a probe request frame to search for nearby APs while changing channels and waits for a response. A responder transmits a probe response frame to the STA that transmitted the probe request frame in response to the probe request frame. Here, the responder may be the STA that last transmitted a beacon frame in the BSS of the channel being scanned. In a BSS, the AP transmits the beacon frame, so the AP is the responder. In an IBSS, the STAs in the IBSS transmit the beacon frame in sequence, so the responder is not fixed. For example, a STA that transmits a probe request frame on channel 1 and receives a probe response frame on channel 1 can store BSS-related information included in the received probe response frame, move to the next channel (e.g., channel 2), and perform scanning in the same manner (i.e., transmit and receive probe request / response on channel 2).

[0053] Although not shown in the example of FIG. 3, the scanning operation may also be performed in a passive scanning manner. A STA performing scanning based on passive scanning can wait for a signal frame while changing channels. A signal frame is one of the management frames in IEEE 802.11, and is transmitted periodically to announce the existence of a wireless network and allow a scanning STA to search for and join the wireless network. In a BSS, an AP periodically transmits signal frames, while in an IBSS, STAs within the IBSS transmit signal frames in turn. When a scanning STA receives a signal frame, it stores information about the BSS included in the signal frame and records the signal frame information on each channel as it moves to another channel. A STA receiving a signal frame stores the BSS-related information included in the received signal frame, moves to the next channel, and performs scanning on the next channel in the same manner.

[0054] An STA that has discovered a network can perform an authentication process through step S320. This authentication process can be referred to as a first authentication process to clearly distinguish it from the security setup operation in step S340, which will be described later. The authentication process in S320 can include a process in which the STA transmits an authentication request frame to the AP, and in response, the AP transmits an authentication response frame to the STA. The authentication frame used for the authentication request / response corresponds to a management frame.

[0055] The authentication frame can include information such as an authentication algorithm number, an authentication transaction sequence number, a status code, a challenge text, a Robust Security Network (RSN), a Finite Cyclic Group, etc.

[0056] The STA can send an authentication request frame to the AP. The AP can determine whether to allow authentication for the STA based on the information contained in the received authentication request frame. The AP can provide the STA with the result of the authentication process via an authentication response frame.

[0057] A successfully authenticated STA can perform an association process according to step S330. The association process includes a process in which the STA transmits an association request frame to the AP, and in response, the AP transmits an association response frame to the STA. For example, the association request frame can include various capability-related information, such as a signal listen interval, a service set identifier (SSID), supported rates, supported channels, an RSN, a mobility domain, supported operating classes, a Traffic Indication Map 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 indicator (RSNI), a mobility domain, a timeout interval (association comeback time), overlapping BSS scan parameters, a TIM broadcast response, a QoS map, and the like.

[0058] Thereafter, in step S340, the STA may perform a security setup process, which may include, for example, a private key setup process via a four-way handshaking using an Extensible Authentication Protocol over LAN (EAPOL) frame.

[0059] FIG. 4 is a diagram showing an example of a PPDU used in the IEEE standard.

[0060] As shown in the figure, various types of PPDUs (PHY protocol data units) are used in standards such as IEEE a / g / n / ac. Specifically, the LTF and STF fields contain training signals, SIG-A and SIG-B contain control information for receiving stations, and the data field contains user data corresponding to the PSDU (MAC PDU / Aggregated MAC PDU).

[0061] 4 also includes an example of an HE PPDU of the IEEE 802.11ax standard. The HE PPDU of FIG. 4 is an example of a PPDU for multiple users, and the HE-SIG-B is included only for multiple users, and the HE-SIG-B can be omitted in a PPDU for a single user.

[0062] As shown in the figure, an HE-PPDU for a multiple user (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 (or MAC payload), and a packet extension (PE) field. Each field may be transmitted during the time interval shown (e.g., 4 or 8 μs, etc.).

[0063] The resource unit (RU) used in the PPDU will be described below. The resource unit can include multiple subcarriers (or tones). The resource unit can be used when transmitting signals to multiple STAs based on the OFDMA technique. The resource unit can also be defined when transmitting a signal to one STA. The resource unit can be used for the STF, LTF, data field, etc.

[0064] FIG. 5 is a diagram showing the allocation of resource units RU used on a 20 MHz band.

[0065] As shown in Figure 5, resource units (RUs) corresponding to different numbers of tones (i.e., subcarriers) may be used to configure some fields of the HE-PPDU. For example, resources may be allocated in units of the RUs shown in the figure to the HE-STF, HE-LTF, and data fields.

[0066] As shown at the top of Figure 5, 26 units (i.e., units corresponding to 26 tones) can be allocated. Six tones can be used as a guard band in the leftmost band of the 20 MHz band, and five tones can be used as a guard band in the rightmost band of the 20 MHz band. Seven DC tones can be inserted into the center band, i.e., the DC band, and 26 units corresponding to 13 tones can be allocated to each side of the DC band. Other bands can be allocated 26 units, 52 units, or 106 units. Each unit can be allocated for a receiving station, i.e., a user.

[0067] On the other hand, the RU arrangement of Figure 5 can be utilized not only in a situation for multiple users MU but also in a situation for a single user SU, in which case, as shown at the bottom of Figure 5, one 242-unit can be used, and in this case, three DC tones can be inserted.

[0068] In the example of Figure 5, various sizes of RUs are proposed, i.e., 26-RU, 52-RU, 106-RU, 242-RU, etc., but the specific sizes of such RUs can be expanded or increased, so this embodiment is not limited to the specific size of each RU (i.e., the number of corresponding tones).

[0069] FIG. 6 is a diagram showing the allocation of resource units RU used on the 40 MHz band.

[0070] Just as various sizes of RUs are used in the example of Figure 5, 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, etc. may be used in the example of Figure 6. In addition, five DC tones may be inserted at the center frequency, 12 tones may be used as a guard band in the leftmost band of the 40 MHz band, and 11 tones may be used as a guard band in the rightmost band of the 40 MHz band.

[0071] Also, as shown in the figure, when used for a single user, 484 RUs may be used, but the specific number of RUs may be changed, as in the example of FIG.

[0072] FIG. 7 is a diagram showing the allocation of resource units RU used on the 80 MHz band.

[0073] Similar to the examples of Figures 5 and 6 in which various sizes of RUs are used, the example of Figure 7 may also use 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, etc. In addition, seven DC tones may be inserted into the center frequency, 12 tones may be used as a guard band in the leftmost band of the 80 MHz band, and 11 tones may be used as a guard band in the rightmost band of the 80 MHz band. In addition, 26-RUs using 13 tones each on the left and right of the DC band may be used.

[0074] Also, as shown, when used for a single user, 996-RU can be used, in which case five DC tones can be inserted.

[0075] The RUs described herein can be used for UL (Uplink) communication and DL (Downlink) communication. For example, when UL-MU communication solicited by a Trigger frame is performed, a transmitting STA (e.g., AP) can assign a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a first STA and a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a second STA via the Trigger frame. Then, the first STA can transmit a first Trigger-based PPDU based on the first RU, and the second STA can transmit a second Trigger-based PPDU based on the second RU. The first and second Trigger-based PPDUs are transmitted to the AP in the same time interval.

[0076] For example, when a DL MU PPDU is configured, the transmitting STA (e.g., AP) can assign a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a first STA and a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a second STA. That is, the transmitting STA (e.g., AP) can transmit the HE-STF, HE-LTF, and Data fields for the first STA via the first RU and the HE-STF, HE-LTF, and Data fields for the second STA via the second RU within one MU PPDU.

[0077] Information regarding the location of the RU can be signaled via HE-SIG-B.

[0078] Figure 8 shows the structure of the HE-SIG-B field.

[0079] As shown, the HE-SIG-B field 810 includes a common field 820 and a user-specific field 830. The common field 820 may include information that applies commonly to all users (i.e., user STAs) that receive the SIG-B. The user-specific field 830 may be referred to as a user-specific control field. When the SIG-B is transmitted to multiple users, the user-specific field 830 may apply to only some of the multiple users.

[0080] As shown in FIG. 8, the common field 820 and the user-specific field 830 can be encoded separately.

[0081] The common field 820 can include N*8 bits of RU allocation information. For example, the RU allocation information can include information about the location of the RU. For example, as shown in FIG. 5, when a 20 MHz channel is used, the RU allocation information can include information about which RU (26-RU / 52-RU / 106-RU) is allocated to which frequency band.

[0082] An example of RU allocation information consisting of 8 bits is as follows:

[0083] [Table 1]

[0084] As shown in the example of Figure 5, a 20 MHz channel can be allocated up to nine 26-RUs. As shown in Table 1, when the RU allocation information in the common field 820 is set to "00000000," nine 26-RUs can be allocated to the corresponding channel (i.e., 20 MHz). Also, as shown in Table 1, when the RU allocation information in the common field 820 is set to "00000001," seven 26-RUs and one 52-RU can be allocated to the corresponding channel. That is, in the example of Figure 5, a 52-RU can be allocated to the rightmost side, and seven 26-RUs can be allocated to the left of that.

[0085] The example in Table 1 shows only a portion of the RU locations that can be displayed in RU allocation information.

[0086] For example, the RU allocation information may include an example of Table 2 below.

[0087] [Table 2]

[0088] "01000y2y1y0" relates to an example in which a 106-RU is allocated to the leftmost position of a 20 MHz channel, and five 26-RUs are allocated to the right of it. In this case, multiple STAs (e.g., User-STAs) can be allocated to the 106-RU based on the MU-MIMO technique. Specifically, up to eight STAs (e.g., User-STAs) can be allocated to the 106-RU, and the number of STAs (e.g., User-STAs) allocated to the 106-RU is determined based on the 3-bit information (y2y1y0). For example, if 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 technique can be N+1.

[0089] Generally, multiple STAs (e.g., User STAs) may be assigned to multiple RUs. However, for an RU with a certain size (e.g., 106 subcarriers) or more, multiple STAs (e.g., User STAs) may be assigned based on the MU-MIMO technique.

[0090] As shown in FIG. 8, the user-specific field 830 may include multiple user fields. As described above, the number of STAs (e.g., user STAs) allocated to a specific channel may be determined based on the RU allocation information in the common field 820. For example, if the RU allocation information in the common field 820 is '00000000', one user STA may be allocated to each of the nine 26-RUs (i.e., a total of nine user STAs may be allocated). That is, up to nine user STAs may be allocated to a specific channel using the OFDMA technique. In other words, up to nine user STAs may be allocated to a specific channel using the non-MU-MIMO technique.

[0091] For example, if RU allocation is set to "01000y2y1y0," multiple user STAs can be allocated to the leftmost 106-RU using the MU-MIMO technique, and five user STAs can be allocated to the five 26-RUs to the right using the non-MU-MIMO technique. This case is embodied in the example of FIG. 9.

[0092] FIG. 9 shows an example in which multiple user STAs are assigned to the same RU using the MU-MIMO technique.

[0093] For example, if RU allocation is set to "01000010" as shown in Figure 9, a 106-RU may be allocated to the leftmost side of a specific channel, and five 26-RUs may be allocated to the right of that, based on Table 2. Also, a total of three user STAs may be allocated to the 106-RU using the MU-MIMO technique. As a result, a total of eight user STAs are allocated, and therefore the user-specific field 830 of the HE-SIG-B may include eight user fields.

[0094] The eight user fields may be included in the order shown in Figure 9. Also, as shown in Figure 8, two user fields may be implemented in one user block field.

[0095] The user fields shown in Figures 8 and 9 can be configured based on two formats. That is, the user field related to the MU-MIMO technique can be configured in a first format, and the user field related to the non-MU-MIMO technique can be configured in a second format. Referring to the example of Figure 9, user fields 1 to 3 can be based on the first format, and user fields 4 to 8 can be based on the second format. The first format or the second format can contain bit information of the same length (e.g., 21 bits).

[0096] Each User field may have the same size (for example, 21 bits). For example, the User field of the first format (the format of the MU-MIMO technique) may be configured as follows:

[0097] For example, the first bits (e.g., 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 to which the User field is assigned. Also, the second bits (e.g., B11-B14) in the User field (i.e., 21 bits) may include information regarding spatial configuration. Specifically, examples of the second bits (i.e., B11-B14) may be as shown in Tables 3 and 4 below.

[0098] [Table 3]

[0099] [Table 4]

[0100] As shown in Table 3 and / or Table 4, the second bits (i.e., B11-B14) may include information regarding the number of spatial streams allocated to multiple user STAs allocated according to the MU-MIMO technique. For example, as shown in FIG. 9, when three user STAs are allocated to 106-RU according to the MU-MIMO technique, N_user is set to '3', and the values ​​of N_STS[1], N_STS[2], and N_STS[3] may be determined as shown in Table 3. For example, when the value of the second bits (B11-B14) is '0011', N_STS[1]=4, N_STS[2]=1, and N_STS[3]=1 may be set. That is, in the example of FIG. 9, four spatial streams may be allocated to user field 1, one spatial stream may be allocated to user field 2, and one spatial stream may be allocated to user field 3.

[0101] As shown in the examples of Table 3 and / or Table 4, information on the number of spatial streams for a user station (User STA) (i.e., second bits, B11-B14) may be configured with 4 bits. Also, the information on the number of spatial streams for a user station (User STA) (i.e., second bits, B11-B14) may support up to 8 spatial streams. Also, the information on the number of spatial streams (i.e., second bits, B11-B14) may support up to 4 spatial streams for one user STA.

[0102] Additionally, the third bit (i.e., B15-18) in the User field (i.e., 21 bits) can contain MCS (Modulation and coding scheme) information, which can be applied to the data field in the PPDU containing the SIG-B.

[0103] As used herein, MCS, MCS information, MCS index, MCS field, etc. may be represented by a specific index value. For example, MCS information may be represented by index 0 to index 11. The MCS information may include information about a modulation type (e.g., BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, etc.) and information about a coding rate (e.g., 1 / 2, 2 / 3, 3 / 4, 5 / 6, etc.). The MCS information may exclude information about a channel coding type (e.g., BCC or LDPC).

[0104] Also, the fourth bit (ie, B19) in the User field (ie, 21 bits) can be a Reserved field.

[0105] In addition, the fifth bit (i.e., B20) in the User field (i.e., 21 bits) may include information about the coding type (e.g., BCC or LDPC). That is, the fifth bit (i.e., B20) may include information about the type of channel coding (e.g., BCC or LDPC) applied to the data field in the PPDU containing the SIG-B.

[0106] The above example relates to the User field of the first format (format for the MU-MIMO technique). An example of the User field of the second format (format for the non-MU-MIMO technique) is as follows:

[0107] The first bit (e.g., B0-B10) in the User field of the second format may include identification information of the User STA. The second bit (e.g., B11-B13) in the User field of the second format may include information regarding the number of spatial streams applied to the RU. The third bit (e.g., B14) in the User field of the second format may include information regarding 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. The fifth bit (e.g., B19) in the User field of the second format may include information regarding whether dual carrier modulation (DCM) is applied. The sixth bit (i.e., B20) in the User field of the second format may include information regarding the coding type (e.g., BCC or LDPC).

[0108] 10 shows the operation of the UL-MU. As shown, a transmitting STA (e.g., AP) can perform channel connection through contending (i.e., backoff operation) and transmit a trigger frame (1030). That is, the transmitting STA (e.g., AP) can transmit a PPDU including a trigger frame (1330). When the PPDU including the trigger frame is received, a TB (trigger-based) PPDU is transmitted after a delay of SIFS.

[0109] The TB PPDUs (1041, 1042) are transmitted during the same time period and can be transmitted from multiple STAs (e.g., User STAs) whose AIDs are indicated in the Trigger Frame (1030). The ACK frame 1050 for the TB PPDU can be realized in various forms.

[0110] Specific features of the trigger frame will be described with reference to Figures 11 to 13. When UL-MU communication is used, the orthogonal frequency division multiple access (OFDMA) technique or the MU MIMO technique can be used, or the OFDMA and MU MIMO techniques can be used simultaneously.

[0111] 11 shows an example of a trigger frame. The trigger frame in FIG. 11 allocates resources for uplink multiple-user (MU) transmission and can be transmitted, for example, from an AP. The trigger frame can be configured as a MAC frame and can be included in a PPDU.

[0112] Some of the fields shown in Figure 11 may be omitted, other fields may be added, and the length of each field may be changed differently from that shown.

[0113] The frame control field 1110 in Figure 11 contains information about the MAC protocol version and other additional control information, and the duration field 1120 may contain information about time information for NAV setting and an STA identifier (e.g., AID).

[0114] Furthermore, the RA field 1130 includes address information of the STA receiving the trigger frame, but may be omitted as necessary. The TA field 1140 includes address information of the STA (e.g., AP) transmitting the trigger frame, and the common information field 1150 includes common control information applied to the receiving STA receiving the trigger frame. For example, a field indicating the length of the L-SIG field of the upstream PPDU transmitted in response to the trigger frame and information controlling the content of the SIG-A field (i.e., the HE-SIG-A field) of the upstream PPDU transmitted in response to the trigger frame may be included. Furthermore, the common control information may include information regarding the length of the CP and the length of the LTF field of the upstream PPDU transmitted in response to the trigger frame.

[0115] It is also preferable to include per user information fields 1160#1 to 1160#N corresponding to the number of receiving STAs that receive the trigger frame of Figure 11. The per user information fields may also be called "allocation fields."

[0116] The trigger frame of FIG. 11 may also include a padding field 1170 and a frame check sequence field 1180.

[0117] Each of the per user information fields 1160#1 to 1160#N shown in FIG. 11 may further include multiple subfields.

[0118] 12 shows an example of a common information field of a trigger frame. Some of the subfields in FIG. 12 may be omitted, and other subfields may be added. Also, the length of each of the illustrated subfields may be modified.

[0119] The illustrated length field 1210 has the same value as the length field of the L-SIG field of the upstream PPDU transmitted corresponding to the trigger frame, and the length field of the L-SIG field of the upstream PPDU indicates the length of the upstream PPDU. As a result, the length field 1210 of the trigger frame can be used to indicate the length of the corresponding uplink PPDU.

[0120] In addition, the cascade indicator field 1220 indicates whether a cascade operation is performed. Cascade operation means that both downlink MU transmission and uplink MU transmission are performed within the same TXOP. That is, it means that uplink MU transmission is performed after a preset time (e.g., SIFS) has elapsed since the downlink MU transmission. During cascade operation, there can be only one transmitter (e.g., AP) performing downlink communication, and multiple transmitters (e.g., non-APs) performing uplink communication.

[0121] The CS request field 1230 indicates whether the receiving device that received the trigger frame should take into account the state of the wireless medium, NAV, etc. when transmitting the corresponding uplink PPDU.

[0122] The HE-SIG-A information field 1240 may include information that controls the content of the SIG-A field (i.e., the HE-SIG-A field) of the upstream PPDU transmitted in response to the trigger frame.

[0123] The CP and LTF type field 1250 may include information about the LTF length and CP length of the upstream PPDU transmitted corresponding to the trigger frame. The trigger type field 1260 may indicate the purpose for which the trigger frame is used, such as normal triggering, triggering for beamforming, or a request for Block ACK / NACK.

[0124] In this specification, the trigger type field 1260 of the trigger frame may be assumed to indicate a basic type trigger frame for normal triggering. For example, a basic type trigger frame may be referred to as a basic trigger frame.

[0125] 13 shows an example of subfields included in a per user information field. The user information field 1300 of FIG. 13 can be understood as any one of the individual user information fields 1160#1 to 1160#N previously mentioned in FIG. 11. Some of the subfields included in the user information field 1300 of FIG. 13 can be omitted, and other subfields can be added. Also, the length of each of the illustrated subfields can be modified.

[0126] The User Identifier field 1310 in FIG. 13 represents an identifier of the STA (i.e., receiving STA) corresponding to individual user information, and an example of the identifier can be all or part of the AID (association identifier) ​​value of the receiving STA.

[0127] Also, an RU Allocation field 1320 may be included. That is, when a receiving STA identified in the user identifier field 1310 transmits a TB PPDU corresponding to the trigger frame, the TB PPDU is transmitted via an RU indicated by the RU Allocation field 1320. In this case, the RU indicated by the RU Allocation field 1320 may be the RU shown in FIGS. 5, 6, and 7.

[0128] 13 may include a coding type field 1330. The coding type field 1330 may indicate the coding type of the TB PPDU. For example, if BCC coding is applied to the TB PPDU, the coding type field 1330 may be set to '1', and if LDPC coding is applied to the TB PPDU, the coding type field 1330 may be set to '0'.

[0129] 13 may include an MCS field 1340. The MCS field 1340 may indicate an MCS scheme applied to the TB PPDU. For example, if BCC coding is applied to the TB PPDU, the coding type field 1330 may be set to '1', and if LDPC coding is applied, the coding type field 1330 may be set to '0'.

[0130] The UL OFDMA-based Random Access (UORA) technique will be described below.

[0131] Figure 14 illustrates the technical features of the UORA technique.

[0132] A transmitting STA (e.g., AP) may allocate six RU resources via a trigger frame as shown in FIG. 14. Specifically, the AP may allocate a first RU resource (AID 0, RU 1), a second RU resource (AID 0, RU 2), a third RU resource (AID 0, RU 3), a fourth RU resource (AID 2045, RU 4), ​​a fifth RU resource (AID 2045, RU 5), and a sixth RU resource (AID 3, RU 6). Information regarding AID 0, AID 3, or AID 2045 may be included, for example, in the user identification field 1310 of FIG. 13. Information regarding RUs 1 through 6 may be included, for example, in the RU allocation field 1320 of FIG. 13. AID=0 may indicate UORA resources for an associated STA, and AID=2045 may indicate UORA resources for an unassociated STA. As a result, the first to third RU resources in Figure 14 can be used as UORA resources for associated STAs, the fourth and fifth RU resources in Figure 14 can be used as UORA resources for unassociated STAs, and the sixth RU resource in Figure 14 can be used as a resource for a normal UL MU.

[0133] In the example shown in Figure 14, the OFDMA random access BackOff (OBO) counter of STA1 is decremented to 0, and STA1 randomly selects the second RU resource, AID 0, RU 2. Also, since the OBO counters of STA2 / 3 are greater than 0, no uplink resources are allocated to STA2 / 3. Also, in Figure 14, STA4 includes its own AID (i.e., AID=3) in the trigger frame, and therefore is allocated resources in RU 6 without backoff.

[0134] Specifically, since STA1 in FIG. 14 is an associated STA, there are a total of three eligible RA RUs for STA1 (RU1, RU2, RU3), and therefore STA1 decrements its OBO counter by 3, resulting in the OBO counter becoming 0. Also, since STA2 in FIG. 14 is an associated STA, there are a total of three eligible RA RUs for STA2 (RU1, RU2, RU3), and therefore STA2 decrements its OBO counter by 3, but the OBO counter is still greater than 0. Also, since STA3 in FIG. 14 is an unassociated STA, there are a total of two eligible RA RUs for STA3 (RU4, RU5), and therefore STA3 decrements its OBO counter by 2, but the OBO counter is still greater than 0.

[0135] FIG. 15 shows an example of channels used / supported / defined within the 2.4 GHz band.

[0136] The 2.4 GHz band may be referred to by other names such as the first band, etc. The 2.4 GHz band may also refer to a frequency range in which channels with center frequencies adjacent to 2.4 GHz (e.g., channels with center frequencies between 2.4 and 2.5 GHz) are used / supported / defined.

[0137] The 2.4 GHz band may include multiple 20 MHz channels. 20 MHz within the 2.4 GHz band may have multiple channel indexes (e.g., index 1 through index 14). For example, the center frequency of a 20 MHz channel assigned channel index 1 may be 2.412 GHz, the center frequency of a 20 MHz channel assigned channel index 2 may be 2.417 GHz, and the center frequency of a 20 MHz channel assigned channel index N may be (2.407 + 0.005 * N) GHz. The channel index may be referred to by various names, such as a channel number. The specific values ​​of the channel index and center frequency may be changed.

[0138] FIG. 15 exemplarily illustrates four channels in the 2.4 GHz band. The illustrated first to fourth frequency regions 1510 to 1540 each include one channel. For example, the first frequency region 1510 may include channel 1 (a 20 MHz channel having an index of 1). The center frequency of channel 1 may be set to 2412 MHz. The second frequency region 1520 may include channel 6. The center frequency of channel 6 may be set to 2437 MHz. The third frequency region 1530 may include channel 11. The center frequency of channel 11 may be set to 2462 MHz. The fourth frequency region 1540 may include channel 14. The center frequency of channel 14 may be set to 2484 MHz.

[0139] FIG. 16 illustrates an example of channels used / supported / defined within the 5 GHz band.

[0140] The 5 GHz band may be referred to by other names such as a second band or band. The 5 GHz band may refer to a frequency range in which channels with center frequencies equal to or greater than 5 GHz and less than 6 GHz (or less than 5.9 GHz) are used / supported / defined. Alternatively, the 5 GHz band may include multiple channels between 4.5 GHz and 5.5 GHz. The specific values ​​shown in FIG. 16 may be changed.

[0141] The channels within the 5 GHz band include the Unlicensed National Information Infrastructure (UNII)-1, UNII-2, UNII-3, and ISM. UNII-1 can be referred to as UNII Low. UNII-2 can include frequency regions called UNII Mid and UNII-2 Extended. UNII-3 can be referred to as UNII Upper.

[0142] Multiple channels can be configured within the 5 GHz band, and the bandwidth of each channel can be variously configured, such as 20 MHz, 40 MHz, 80 MHz, or 160 MHz. For example, the 5170 MHz to 5330 MHz frequency region / range within UNII-1 and UNII-2 can be divided into eight 20 MHz channels. The 5170 MHz to 5330 MHz frequency region / range can be divided into four channels via a 40 MHz frequency region. The 5170 MHz to 5330 MHz frequency region / range can be divided into two channels via an 80 MHz frequency region. Alternatively, the 5170 MHz to 5330 MHz frequency region / range can be divided into one channel via a 160 MHz frequency region.

[0143] FIG. 17 illustrates an example of channels used / supported / defined within the 6 GHz band.

[0144] The 6 GHz band may be referred to by other names such as the third band / band. The 6 GHz band may refer to a frequency range in which channels with center frequencies of 5.9 GHz or higher are used / supported / defined. The specific values ​​shown in FIG. 17 may be changed.

[0145] For example, the 20 MHz channels in Figure 17 can be defined starting from 5.940 GHz. Specifically, the leftmost channel of the 20 MHz channels in Figure 17 can have an index (or channel index, channel number, etc.) of 1, and can be assigned a center frequency of 5.945 GHz. That is, the center frequency of channel index N can be determined as (5.940 + 0.005 * N) GHz.

[0146] Thus, the indices (or channel numbers) of the 20 MHz channels in FIG. 17 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. Also, following the (5.940+0.005*N) GHz rule mentioned above, the indices for the 40 MHz channels in Figure 17 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.

[0147] In the example of FIG. 17, 20, 40, 80, and 160 MHz channels are shown, but 240 MHz and 320 MHz channels can also be added.

[0148] The PPDUs transmitted / received by the STAs in this specification are described below.

[0149] FIG. 18 shows an example of a PPDU used in this specification.

[0150] 18 may be referred to by various names such as an EHT PPDU, a transmit PPDU, a receive PPDU, a first type, or an Nth type PPDU. For example, in this specification, a PPDU or an EHT PPDU may be referred to by various names such as a transmit PPDU, a receive PPDU, a first type, or an Nth type PPDU. Furthermore, an EHT PPDU may be used in an EHT system and / or a new wireless RAN system that is an improvement over an EHT system.

[0151] The PPDU of Figure 18 may indicate some or all of the PPDU types used in the EHT system. For example, the example of Figure 18 can be used for both single-user (SU) mode and multi-user (MU) mode. In other words, the PPDU of Figure 18 is a PPDU for one receiving STA or multiple receiving STAs. When the PPDU of Figure 18 is used for trigger-based (TB) mode, the EHT-SIG of Figure 18 may be omitted. In other words, a STA that receives a trigger frame for uplink-MU (UL-MU) communication can transmit a PPDU in the example of Figure 18 from which the EHT-SIG is omitted.

[0152] In FIG. 18, the L-STF to EHT-LTF can be referred to as a preamble or a physical preamble, and can be generated / transmitted / received / acquired / decoded in the physical layer.

[0153] The subcarrier spacing of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields in Figure 18 may be determined to be 312.5 kHz, and the subcarrier spacing of the EHT-STF, EHT-LTF, and Data fields may be determined to be 78.125 kHz. That is, the tone index (or subcarrier index) of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields may be expressed in units of 312.5 kHz, and the tone index (or subcarrier index) of the EHT-STF, EHT-LTF, and Data fields may be expressed in units of 78.125 kHz.

[0154] The L-LTF and L-STF in the PPDU of FIG. 18 above can be the same as conventional fields.

[0155] The L-SIG field in FIG. 18 may include, for example, 24-bit bit information. For example, the 24-bit information may include a 4-bit Rate field, a 1-bit Reserved bit, a 12-bit Length field, a 1-bit Parity bit, and 6 Tail bits. For example, the 12-bit Length field may include information regarding the length or time duration of the PPDU. For example, the value of the 12-bit Length field may be determined based on the type of PPDU. For example, if the PPDU is a non-HT, HT, or VHT PPDU, or an EHT PPDU, the value of the Length field may be determined to be a multiple of 3. For example, if the PPDU is an HE PPDU, the value of the Length field may be determined to be "multiple of 3 + 1" or "multiple of 3 + 2." In other words, for a non-HT, HT, VHT PPDU, or EHT PPDU, the value of the Length field can be determined to be a multiple of 3, and for an HE PPDU, the value of the Length field can be determined to be "a multiple of 3 + 1" or "a multiple of 3 + 2".

[0156] For example, the transmitting STA may apply BCC encoding based on a code rate of 1 / 2 to the 24-bit information in the L-SIG field. The transmitting STA may then obtain 48 BCC-encoded bits. BPSK modulation may be applied to the 48 encoded bits to generate 48 BPSK symbols. The transmitting STA may map the 48 BPSK symbols to positions excluding the pilot subcarriers {subcarrier indexes -21, -7, +7, +21} and the DC subcarrier {subcarrier index 0}. Consequently, 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 further map signals of {-1, -1, -1, 1} to subcarrier indexes {-28, -27, +27, +28}. The above signal can be used for channel estimation for the frequency domain corresponding to {-28, -27, +27, +28}.

[0157] The transmitting STA can generate an RL-SIG, which is generated similarly to the L-SIG. BPSK modulation can be applied to the RL-SIG. The receiving STA can determine whether the received PPDU is an HE PPDU or an EHT PPDU based on the presence of the RL-SIG.

[0158] A Universal SIG (U-SIG) can be inserted after the RL-SIG in Figure 18. The U-SIG can be called various names such as a first SIG field, a first SIG, a first type SIG, a control signal, a control signal field, or a first (type) control signal.

[0159] The U-SIG may contain N bits of information, including information for identifying the type of EHT PPDU. For example, the U-SIG may be configured based on two symbols (e.g., two consecutive OFDM symbols). Each symbol (e.g., OFDM symbol) for the U-SIG may have a duration of 4 us. Each symbol of the U-SIG may be used to transmit 26 bits of information. For example, each symbol of the U-SIG may be transmitted and received based on 52 data tones and 4 pilot tones.

[0160] For example, A-bit information (e.g., 52 uncoded bits) can be transmitted via the U-SIG (or U-SIG field), with the first symbol of the U-SIG transmitting the first X-bit information (e.g., 26 uncoded bits) of the total A-bit information, and the second symbol of the U-SIG transmitting the remaining Y-bit information (e.g., 26 uncoded bits) of the total A-bit information. For example, the transmitting STA can obtain the 26 uncoded bits included in each U-SIG symbol. The transmitting STA can perform convolutional encoding (i.e., BCC encoding) based on a rate of R=½ to generate 52-coded bits and perform interleaving on the 52-coded bits. The transmitting STA can perform BPSK modulation on the interleaved 52-coded bits to generate 52 BPSK symbols assigned to each U-SIG symbol. One U-SIG symbol can be transmitted based on 56 tones (subcarriers) from subcarrier index -28 to subcarrier index +28, excluding DC index 0. The 52 BPSK symbols generated by the transmitting STA can be transmitted based on the remaining tones (subcarriers) excluding the pilot tones -21, -7, +7, and +21.

[0161] For example, A-bit information (e.g., 52 un-coded bits) transmitted by a U-SIG may include a CRC field (e.g., a 4-bit long field) and a tail field (e.g., a 6-bit long field). The CRC field and tail field may be transmitted via the second symbol of the U-SIG. The CRC field may be generated based on the 26 bits assigned to the first symbol of the U-SIG and the remaining 16 bits in the second symbol excluding the CRC / tail field, and may be generated based on a conventional CRC calculation algorithm. In addition, the tail field may be used to terminate the trellis of a convolutional decoder and may be set to, for example, "000000."

[0162] The A-bit information (e.g., 52 uncoded bits) transmitted by the U-SIG (or U-SIG field) can be divided into version-independent bits and version-dependent bits. For example, the size of the version-independent bits can be fixed or variable. For example, the version-independent bits can be assigned only to the first symbol of the U-SIG, or the version-independent bits can be assigned to both the first and second symbols of the U-SIG. For example, the version-independent bits and the version-dependent bits can be referred to by various names such as first control bits and second control bits.

[0163] 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 transmitted / received PPDU. For example, a first value of the 3-bit PHY version identifier may indicate that the transmitted / received PPDU is an EHT PPDU. In other words, when transmitting an EHT PPDU, the transmitting STA may set the 3-bit PHY version identifier to a first value. In other words, the receiving STA may determine that the received PPDU is an EHT PPDU based on the PHY version identifier having the first value.

[0164] For example, the version-independent bits of the U-SIG may include a 1-bit UL / DL flag field, where a first value of the 1-bit UL / DL flag field is associated with UL communication and a second value of the UL / DL flag field is associated with DL communication.

[0165] For example, the version-independent bits of the U-SIG may include information about the length of the TXOP and information about the BSS color ID.

[0166] For example, if the EHT PPDU is divided into various types (e.g., EHT PPDU supporting SU, EHT PPDU supporting MU, EHT PPDU related to Trigger Frame, EHT PPDU related to Extended Range transmission, etc.), information regarding the type of EHT PPDU can be included in the version-dependent bits of the U-SIG.

[0167] For example, the U-SIG may include information regarding 1) a bandwidth field containing information regarding the bandwidth, 2) a field containing information regarding the MCS technique applied to the EHT-SIG, 3) an indication field containing information related to whether the dual subcarrier modulation (DCM) technique is applied to the EHT-SIG, 4) a field containing information regarding the number of symbols used for the EHT-SIG, 5) a field containing information regarding whether the EHT-SIG is generated across the entire band, 6) a field containing information regarding the type of EHT-LTF / STF, and 7) a field indicating the length of the EHT-LTF and the CP length.

[0168] Preamble puncturing may be applied to the PPDU in Figure 18. Preamble puncturing refers to applying puncturing to a portion of the entire bandwidth of the PPDU (e.g., the secondary 20 MHz band). For example, when an 80 MHz PPDU is transmitted, the STA applies puncturing to the secondary 20 MHz band of the 80 MHz band, and can transmit the PPDU only through the primary 20 MHz band and the secondary 40 MHz band.

[0169] For example, the preamble puncturing pattern may be preset. For example, when a first puncturing pattern is applied, puncturing may be applied only to a secondary 20 MHz band within an 80 MHz band. For example, when a second puncturing pattern is applied, puncturing may be applied only to one of two secondary 20 MHz bands included in a secondary 40 MHz band within an 80 MHz band. For example, when a third puncturing pattern is applied, puncturing may be applied only to a secondary 20 MHz band included in a primary 80 MHz band within a 160 MHz band (or an 80+80 MHz band). For example, when a fourth puncturing pattern is applied, puncturing may be applied to at least one 20 MHz channel present in a primary 40 MHz band included in a primary 80 MHz band within a 160 MHz band (or an 80+80 MHz band) that does not belong to the primary 40 MHz band.

[0170] Information about preamble puncturing applied to the PPDU may be included in the U-SIG and / or the EHT-SIG, for example, a first field of the U-SIG may include information about the contiguous bandwidth of the PPDU, and a second field of the U-SIG may include information about preamble puncturing applied to the PPDU.

[0171] For example, the U-SIG and EHT-SIG may include information about preamble puncturing based on the following method: If the bandwidth of a PPDU exceeds 80 MHz, the U-SIGs may be individually configured in 80 MHz increments. For example, if the bandwidth of a 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 about the 160 MHz bandwidth, and the second field of the first U-SIG may include information about the preamble puncturing applied to the first 80 MHz band (i.e., information about the preamble puncturing pattern). Also, the first field of the second U-SIG may include information about the 160 MHz bandwidth, and the second field of the second U-SIG may include information about the preamble puncturing applied to the second 80 MHz band (i.e., information about the preamble puncturing pattern). On the other hand, the EHT-SIG subsequent to the first U-SIG may include information regarding the preamble puncturing applied to the second 80 MHz band (i.e., information regarding the preamble puncturing pattern), and the EHT-SIG subsequent to the second U-SIG may include information regarding the preamble puncturing applied to the first 80 MHz band (i.e., information regarding the preamble puncturing pattern).

[0172] Additionally or alternatively, the U-SIG and the EHT-SIG may include information about preamble puncturing based on the following method: The U-SIG may include information about preamble puncturing for all bands (i.e., information about preamble puncturing patterns). That is, the EHT-SIG does not include information about preamble puncturing, and only the U-SIG may include information about preamble puncturing (i.e., information about preamble puncturing patterns).

[0173] U-SIGs can be configured in 20 MHz increments. For example, when an 80 MHz PPDU is configured, U-SIGs can be duplicated. That is, four identical U-SIGs can be included in an 80 MHz PPDU. PPDUs exceeding the 80 MHz bandwidth can contain different U-SIGs.

[0174] The EHT-SIG in Figure 18 can include control information for the receiving STA. The EHT-SIG can be transmitted via at least one symbol, and one symbol can have a length of 4us. Information regarding the number of symbols used for the EHT-SIG can be included in the U-SIG.

[0175] The EHT-SIG may include the technical features of the HE-SIG-B described in Figures 8 to 9. For example, the EHT-SIG may include a common field and a user-specific field, as in the example of Figure 8. 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.

[0176] As in the example of FIG. 8, the common field of the EHT-SIG and the user-specific field of the EHT-SIG can be coded separately. One user block field included in the user-specific field can include information for two users, while the last user block field included in the user-specific field can include information for one user. That is, one user block field of the EHT-SIG can include up to two user fields. As in the example of FIG. 9, each user field can be associated with MU-MIMO allocation or non-MU-MIMO allocation.

[0177] Similar to the example of FIG. 8, the common field of the EHT-SIG may include CRC bits and Tail bits, where the length of the CRC bits may be determined by 4 bits, and the length of the Tail bits may be determined by 6 bits and set to "000000".

[0178] As in the example of Figure 8, the common field of the EHT-SIG may include RU allocation information. The RU allocation information may refer to information about the locations of RUs to which multiple users (i.e., multiple receiving STAs) are assigned. The RU allocation information may be configured in 8-bit (or N-bit) units, as in Table 1.

[0179] Tables 5 to 7 are examples of 8-bit (or N-bit) information for various RU allocations. The indexes shown in each table are changeable, and some entries in Tables 5 to 7 can be omitted and entries not shown can be added.

[0180] Examples of Tables 5 to 7 relate to information about the locations of RUs allocated to a 20 MHz band. For example, "Index 0" in Table 5 can be used in a situation where nine 26-RUs are individually allocated (e.g., a situation where nine 26-RUs are individually allocated as shown in FIG. 5).

[0181] On the other hand, in an EHT system, multiple RUs can be assigned to one STA. For example, in the case of "Index 60" in Table 6, one 26-RU is assigned to one user (i.e., the receiving STA) on the far left side of the 20 MHz band, and one 26-RU and one 52-RU are assigned to another user (i.e., the receiving STA) on the right side, and five 26-RUs can be assigned individually on the right side of that.

[0182] Table 5

[0183] Table 6

[0184] Table 7

[0185] A mode in which the common field of the EHT-SIG is omitted may be supported. The mode in which the common field of the EHT-SIG is omitted may be referred to as a compressed mode. When the compressed mode is used, multiple users of the EHT PPDU (i.e., multiple receiving STAs) can decode the PPDU (e.g., the data field of the PPDU) based on non-OFDMA. That is, multiple users of the EHT PPDU can decode the PPDU (e.g., the data field of the PPDU) received via the same frequency band. On the other hand, when the non-compressed mode is used, multiple users of the EHT PPDU can decode the PPDU (e.g., the data field of the PPDU) based on OFDMA. That is, multiple users of the EHT PPDU can receive the PPDU (e.g., the data field of the PPDU) via different frequency bands. The EHT-SIG may be configured based on various MCS techniques. As described above, information related to the MCS technique applied to the EHT-SIG may be included in the U-SIG. The EHT-SIG may be configured based on the DCM technique. For example, of N data tones (e.g., 52 data tones) allocated for the EHT-SIG, a first modulation technique may be applied to consecutive half of the tones, and a second modulation technique may be applied to the remaining consecutive half of the tones. That is, the transmitting STA may modulate specific control information onto a first symbol based on a first modulation technique and allocate it to consecutive half of the tones, and modulate the same control information onto a second symbol based on a second modulation technique and allocate it to the remaining consecutive half of the tones. As described above, information (e.g., a 1-bit field) related to whether the DCM technique is applied to the EHT-SIG may be included in the U-SIG.

[0186] The EHT-STF of Figure 18 can be used to improve automatic gain control estimation in a MIMO (multiple input multiple output) or OFDMA environment, and the EHT-LTF of Figure 18 can be used to estimate the channel in a MIMO or OFDMA environment.

[0187] The EHT-STF of FIG. 18 can be configured into various types. For example, the first type of STF (i.e., 1x STF) can be generated based on a first type STF sequence in which non-zero coefficients are arranged at intervals of 16 subcarriers. The STF signal generated based on the first type STF sequence can have a period of 0.8 μs, and the 0.8 μs periodic signal can be repeated five times to become the first type STF having a length of 4 μs. For example, the second type of STF (i.e., 2x STF) can be generated based on a second type STF sequence in which non-zero coefficients are arranged at intervals of 8 subcarriers. The STF signal generated based on the second type STF sequence can have a period of 1.6 μs, and the 1.6 μs periodic signal can be repeated five times to become the second type EHT-STF having a length of 8 μs. An example of a sequence (i.e., an EHT-STF sequence) for configuring the EHT-STF will be presented below. The following sequence can be modified in various manners.

[0188] The EHT-STF can be constructed based on the following M-sequence:

[0189] <Number 1>

[0190] M={-1, -1, -1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, -1, 1}

[0191] The EHT-STF for a 20 MHz PPDU can be configured based on the following equation. An example of the following may be a first type (i.e., 1x STF) sequence. For example, the first type sequence may be included in an EHT-PPDU that is not a trigger-based (TB) PPDU. In the following equation, (a:b:c) may refer to an interval defined from a tone index (i.e., subcarrier index) to c tone index at b tone spacing (i.e., subcarrier spacing). For example, Equation 2 below may represent a sequence defined at 16 tone intervals from tone index -112 to 112 index. Since a subcarrier spacing of 78.125 kHz is applied to the EHT-STF, the 16 tone spacing may mean that EHT-STF coefficients (or elements) are arranged at intervals of 78.125*16=1250 kHz. Also, * means multiplication, and sqrt() means the square root.

[0192] <Number 2>

[0193] EHT-STF(-112:16:112)={M}*(1+j) / sqrt(2)

[0194] EHT-STF(0)=0

[0195] The EHT-STF for 40MHz PPDU may be configured based on the following formula: An example of the following may be a first type (ie, 1x STF) sequence.

[0196] <Number 3>

[0197] EHT-STF(-240:16:240)={M, 0, -M}*(1+j) / sqrt(2)

[0198] The EHT-STF for the 80MHz PPDU may be configured based on the following formula: An example of the following may be a first type (ie, 1x STF) sequence.

[0199] <Number 4>

[0200] EHT-STF(-496:16:496)={M, 1, -M, 0, -M, 1, -M}*(1+j) / sqrt(2)

[0201] The EHT-STF for the 160MHz PPDU may be configured based on the following formula: The following example may be a first type (ie, 1x STF) sequence.

[0202] <Number 5>

[0203] EHT-STF(-1008:16:1008)={M, 1, -M, 0, -M, 1, -M, 0, -M, -1, M, 0, -M, 1, -M}*(1+j) / sqrt(2)

[0204] The sequence for the lower 80 MHz of the EHT-STF for the 80+80 MHz PPDU may be the same as Equation 4. The sequence for the upper 80 MHz of the EHT-STF for the 80+80 MHz PPDU may be configured based on the following equation.

[0205] <Number 6>

[0206] EHT-STF(-496:16:496)={-M, -1, M, 0, -M, 1, -M}*(1+j) / sqrt(2)

[0207] Hereinafter, Equations 7 to 11 relate to an example of a second type (ie, 2x STF) sequence.

[0208] <Number 7>

[0209] EHT-STF(-120:8:120)={M, 0, -M}*(1+j) / sqrt(2)

[0210] The EHT-STF for 40MHz PPDU can be constructed based on the following formula:

[0211] <Number 8>

[0212] EHT-STF(-248:8:248)={M, -1, -M, 0, M, -1, M}*(1+j) / sqrt(2)

[0213] EHT-STF(-248)=0

[0214] EHT-STF(248)=0

[0215] The EHT-STF for 80MHz PPDU can be constructed based on the following formula:

[0216] <Number 9>

[0217] EHT-STF(-504:8:504)={M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M}*(1+j) / sqrt(2)

[0218] The EHT-STF for 160MHz PPDU can be constructed based on the following formula:

[0219] <Number 10>

[0220] 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)

[0221] EHT-STF(-8)=0, EHT-STF(8)=0,

[0222] EHT-STF(-1016)=0, EHT-STF(1016)=0

[0223] The sequence for the lower 80 MHz of the EHT-STF for the 80+80 MHz PPDU may be the same as Equation 9. The sequence for the upper 80 MHz of the EHT-STF for the 80+80 MHz PPDU may be configured based on the following equation.

[0224] <Number 11>

[0225] EHT-STF(-504:8:504)={-M, 1, -M, 1, M, 1, -M, 0, -M, 1, M, 1, -M, 1, -M}*(1+j) / sqrt(2)

[0226] EHT-STF(-504)=0,

[0227] EHT-STF(504)=0

[0228] The EHT-LTF can have first, second, and third types (i.e., 1x, 2x, and 4x LTFs). For example, the first, second, and third type LTFs can be generated based on an LTF sequence in which non-zero coefficients are arranged at intervals of 4, 2, or 1 subcarriers. The first, second, and third type LTFs can have time lengths of 3.2, 6.4, and 12.8 μs. In addition, GIs of various lengths (e.g., 0.8, 1, 6, and 3.2 μs) can be applied to the first, second, and third type LTFs.

[0229] Information about the type of STF and / or LTF (including information about the GI applied to the LTF) can be included in the SIG A field and / or SIG B field of FIG. 18, etc.

[0230] The PPDU of FIG. 18 (ie, EHT-PPDU) can be configured based on the examples of FIGS.

[0231] For example, an EHT PPDU transmitted on a 20 MHz band, i.e., a 20 MHz EHT PPDU, can be configured based on the RU in Figure 5. That is, the RU locations of the EHT-STF, EHT-LTF, and data fields included in the EHT PPDU can be determined as shown in Figure 5.

[0232] An EHT PPDU transmitted on the 40 MHz band, i.e., a 40 MHz EHT PPDU, can be configured based on the RU in Figure 6. That is, the RU locations of the EHT-STF, EHT-LTF, and data fields included in the EHT PPDU can be determined as shown in Figure 6.

[0233] Since the RU locations in Figure 6 correspond to 40 MHz, a tone-plan for 80 MHz can be determined by repeating the pattern in Figure 6 twice. That is, the 80 MHz EHT PPDU can be transmitted based on a new tone-plan in which the RUs in Figure 6, but not the RUs in Figure 7, are repeated twice.

[0234] 6 is repeated twice, 23 tones (i.e., 11 guard tones + 12 guard tones) can be configured in the DC region. That is, the tone plan for an 80 MHz EHT PPDU allocated based on OFDMA can have 23 DC tones. In contrast, an 80 MHz EHT PPDU allocated based on non-OFDMA (i.e., a non-OFDMA full bandwidth 80 MHz PPDU) can be configured based on 996RU and can include 5 DC tones, 12 left guard tones, and 11 right guard tones.

[0235] The tone plan for 160 / 240 / 320 MHz can be configured by repeating the pattern of FIG. 6 multiple times.

[0236] The PPDU in FIG. 18 can be determined (or identified) as an EHT PPDU based on the following method.

[0237] The receiving STA can determine that the type of the received PPDU is an EHT PPDU based on the following: For example, if 1) the first symbol after the L-LTF signal of the received PPDU is BPSK, 2) an RL-SIG in which the L-SIG of the received PPDU is repeated is detected, and 3) the result of applying 'modulo 3' to the value of the Length field of the L-SIG of the received PPDU is detected as '0', the received PPDU can be determined to be an EHT PPDU. If the received PPDU is determined to be an EHT PPDU, the receiving STA can detect the type of the EHT PPDU (e.g., SU / MU / Trigger-based / Extended Range type) based on bit information included in the symbols after the RL-SIG in FIG. 18. In other words, the receiving STA can determine that the received PPDU is an EHT PPDU based on: 1) the first symbol after the L-LTF signal, which is the BSPK; 2) the RL-SIG that follows the L-SIG field and is the same as the L-SIG; 3) the L-SIG including a Length field in which the result of applying "modulo 3" is set to "0"; and 4) the 3-bit PHY version identifier (e.g., the PHY version identifier having the first value) of the U-SIG mentioned above.

[0238] For example, the receiving STA can determine that the type of the received PPDU is a HE PPDU based on the following: 1) the first symbol after the L-LTF signal is BPSK, 2) an RL-SIG in which an L-SIG is repeated is detected, and 3) the result of applying 'modulo 3' to the length value of the L-SIG is detected as '1' or '2', the received PPDU can be determined to be a HE PPDU.

[0239] For example, the receiving STA can determine the type of the received PPDU as non-HT, HT, or VHT PPDU based on the following: For example, if 1) the first symbol after the L-LTF signal is BPSK, and 2) an RL-SIG in which an L-SIG is repeated is not detected, the received PPDU can be determined as a non-HT, HT, or VHT PPDU. Also, even if the receiving STA detects a repetition of an RL-SIG, if the result of applying "modulo 3" to the length value of the L-SIG is detected as "0," the received PPDU can be determined as a non-HT, HT, or VHT PPDU.

[0240] In the following example, signals indicated as (transmit / receive / upward / downward) signals, (transmit / receive / upward / downward) frames, (transmit / receive / upward / downward) packets, (transmit / receive / upward / downward) data units, (transmit / receive / upward / downward) data, etc. may be signals transmitted and received based on the PPDU of FIG. 18. The PPDU of FIG. 18 may be used to transmit and receive various types of frames. For example, the PPDU of FIG. 18 may be used for a control frame. Examples of control frames may include a request to send (RTS), a clear to send (CTS), a Power Save-Poll (PS-Poll), a BlockKACKReq, a BlockAck, a Null Data Packet (NDP) announcement, and a Trigger Frame. For example, the PPDU of FIG. 18 may be used for a management frame. Examples of management frames include a Beacon frame, a (Re-)Association Request frame, a (Re-)Association response frame, a Probe Request frame, and a Probe Response frame. For example, the PPDU in Fig. 18 can be used for a data frame. For example, the PPDU in Fig. 18 can also be used to simultaneously transmit at least two or more of a control frame, a management frame, and a data frame.

[0241] FIG. 19 shows a modified example of the transmitting device and / or receiving device of this specification.

[0242] Each device / STA in sub-drawings (a) / (b) of Figure 1 can be modified as shown in Figure 19. The transceiver 630 in Figure 19 can be the same as the transceivers 113 and 123 in Figure 1. The transceiver 630 in Figure 19 can include a receiver and a transmitter.

[0243] The processor 610 in Figure 19 can be the same as the processors 111 and 121 in Figure 1. Alternatively, the processor 610 in Figure 19 can be the same as the processing chips 114 and 124 in Figure 1.

[0244] The memory 150 in Figure 19 can be the same as the memories 112, 122 in Figure 1. Alternatively, the memory 150 in Figure 19 can be a separate external memory that is different from the memories 112, 122 in Figure 1.

[0245] 19, a power management module 611 manages power to the processor 610 and / or the transceiver 630. A battery 612 provides power to the power management module 611. A display 613 outputs results processed by the processor 610. A keypad 614 receives inputs used by the processor 610. The keypad 614 can be displayed on the display 613. A SIM card 615 can be an integrated circuit used to securely store an international mobile subscriber identity (IMSI) and associated keys used to identify and authenticate subscribers on mobile phone devices such as mobile phones and computers.

[0246] 19, the speaker 640 can output sound-related results processed by the processor 610. The microphone 641 can receive sound-related inputs for use by the processor 610.

[0247] FIG. 20 shows an example of an HE-PPDU.

[0248] The illustrated L-STF2000 can include short training OFDM symbols (orthogonal frequency division multiplexing symbols), which can be used for frame detection, automatic gain control (AGC), diversity detection, and coarse frequency / time synchronization.

[0249] L-LTF2010 can include long training OFDM symbols (orthogonal frequency division multiplexing symbols), which can be used for fine frequency / time synchronization and channel estimation.

[0250] The L-SIG2020 can be used to transmit control information. The L-SIG2020 can include information about a data transmission rate and a data length. The L-SIG2020 can also be repeatedly transmitted. That is, the L-SIG2020 can be configured in a repeated format (e.g., referred to as an R-LSIG).

[0251] The HE-SIG-A2030 may contain control information common to receiving stations.

[0252] Specifically, the HE-SIG-A2030 includes: 1) a DL / UL indicator; 2) a BSS color field, which is a BSS identifier; 3) a field indicating the remaining time of the current TXOP interval; 4) a bandwidth field indicating whether 20, 40, 80, 160, or 80+80 MHz is available; 5) a field indicating the MCS technique to be applied to the HE-SIG-B; 6) a field indicating whether the HE-SIG-B is modulated using a dual subcarrier modulation technique for the MCS; 7) a field indicating the number of symbols used for the HE-SIG-B; 8) a field indicating whether the HE-SIG-B is generated across the entire band; 9) a field indicating the number of symbols for the HE-LTF; 10) a field indicating the length of the HE-LTF and the CP length; 11) a field indicating whether additional OFDM symbols are present for LDPC coding; 12) a PE (Packet 1) a field indicating control information related to the HE-SIG-A (Encoding Extension), 2) a field indicating information related to the CRC field of the HE-SIG-A, etc. Specific fields of the HE-SIG-A may be added or omitted. Also, in environments other than the multi-user (MU) environment, some fields may be added or omitted.

[0253] Additionally, HE-SIG-A2030 can be composed of two parts: HE-SIG-A1 and HE-SIG-A2. HE-SIG-A1 and HE-SIG-A2 included in HE-SIG-A can be defined in the following format structure (fields) by PPDU. First, the HE-SIG-A field of the HE SU PPDU can be defined as follows:

[0254] [Table 8]

[0255] [Table 9]

[0256] [Table 10]

[0257] [Table 11]

[0258] Also, the HE-SIG-A field of the HE MU PPDU can be defined as follows:

[0259] [Table 12]

[0260] [Table 13]

[0261] [Table 14]

[0262] [Table 15]

[0263] Also, the HE-SIG-A field of the HE TB PPDU can be defined as follows:

[0264] [Table 16]

[0265] [Table 17]

[0266] [Table 18]

[0267] [Table 19]

[0268] [Table 20]

[0269] As mentioned above, HE-SIG-B2040 can be included only if the PPDU is for multiple users (MUs). Essentially, HE-SIG-A2050 or HE-SIG-B2060 can include resource allocation information (or virtual resource allocation information) for at least one receiving STA.

[0270] In the following, technical features that can be applied to the EHT standard can be described.

[0271] According to one embodiment, the EHT standard supports PPDUs with 320 MHz and 160+160 MHz bandwidths. It also supports 240 MHz and 160+80 MHz transmissions. The 240 MHz and 160+80 MHz bandwidths can be configured by applying 80 MHz preamble puncturing to the 320 MHz and 160+160 MHz bandwidths. For example, the 240 MHz and 160+80 MHz bandwidths can be configured based on three 80 MHz channels, including a primary 80 MHz channel.

[0272] According to one embodiment, the tone plan of the 11ax standard can be used for 20 / 40 / 80 / 160 / 80+80 MHz PPDU in the EHT standard. According to one embodiment, the 160 MHz OFDMA tone plan of the 11ax standard can be duplicated and used for 320 MHz and 160+160 MHz PPDU.

[0273] According to one embodiment, the 240 MHz and 160+80 MHz transmissions can be configured in three 80 MHz segments. For example, the tone plan for each 80 MHz segment can be configured the same as the 80 MHz tone plan for the 11ax standard.

[0274] According to one embodiment, the 160 MHz tone plan can be replicated and used for the non-OFDMA tone plan of the 320 / 160+160 MHz PPDU.

[0275] According to one embodiment, a replicated HE160 tone plan can be used for the non-OFDMA tone plan of 320 / 160+160 MHz PPDU.

[0276] According to one embodiment, 12 and 11 null tones may be configured at the leftmost and rightmost positions, respectively, in each 160 MHz segment for a non-OFDMA tone plan of a 320 / 160+160 MHz PPDU.

[0277] According to one embodiment, the data portion of the EHT PPDU may use the same subcarrier spacing as the data portion of the 11ax standard.

[0278] In the following, technical features related to a Resource Unit (RU) that can be applied to the EHT standard will be described.

[0279] According to one embodiment, the EHT standard allows one or more RUs to be assigned to a single STA, and various coding and interleaving schemes for multiple RUs assigned to a single STA can be configured.

[0280] According to one embodiment, small-size RUs can be combined with small-size RUs, and according to one embodiment, large-size RUs can be combined with large-size RUs.

[0281] For example, an RU with 242 tones or more can be defined / configured as a large-size RU. As another example, an RU with fewer than 242 tones can be defined / configured as a small-size RU.

[0282] According to one embodiment, there can be one PSDU per STA for each link. According to one embodiment, for LDPC encoding, one encoder can be used for each PSDU.

[0283] Small-size RUs

[0284] According to one embodiment, the combination of small-sized RUs can be configured so as not to cross the 20 MHz channel boundary. For example, the combination of small-sized RUs can be configured as RU106+RU26 and RU52+RU26.

[0285] According to one embodiment, in 20 MHz and 40 MHz PPDUs, consecutive RUs 26 and 106 can be combined / combined within a 20 MHz boundary.

[0286] According to one embodiment, RU26 and RU52 can be combined / combined in 20 MHz and 40 MHz PPDUs.

[0287] For example, an example of consecutive RU26 and RU52 at 20 MHz (or 20 MHz PPDU) can be illustrated via FIG.

[0288] Figure 21 shows an example of a combination of RU26 and RU52 at 20 MHz.

[0289] 21, the shaded RUs 26 and 52 can be combined. For example, the second RU 26 and the second RU 52 can be combined. As another example, the seventh RU and the third RU 52 can be combined.

[0290] For example, an example of consecutive RU26 and RU52 at 40 MHz can be illustrated via FIG.

[0291] Figure 22 shows an example of a combination of RU26 and RU52 at 40 MHz.

[0292] Referring to Figure 22, the shaded RU26 and RU52 can be combined. For example, the second RU26 and the second RU52 can be combined. As another example, the eighth RU26 and the third RU52 can be combined. As another example, the eleventh RU26 and the sixth RU52 can be combined. As another example, the seventeenth RU26 and the seventh RU52 can be combined.

[0293] According to one embodiment, RU26 and RU52 can be combined / concatenated in an 80 MHz PPDU.

[0294] For example, an example of consecutive RU26 and RU52 at 80 MHz can be illustrated via FIG.

[0295] Figure 23 shows an example of a combination of RU26 and RU52 at 80 MHz.

[0296] 23, 80 MHz can be divided into a first 40 MHz and a second 40 MHz. For example, within the first 40 MHz, the eighth RU 26 and the third RU 52 can be combined. As another example, within the first 40 MHz, the eleventh RU 26 and the sixth RU 52 can be combined. As another example, within the second 40 MHz, the eighth RU 26 and the third RU 52 can be combined. As another example, within the second 40 MHz, the eleventh RU 26 and the sixth RU 52 can be combined.

[0297] According to one embodiment, when LDPC coding is applied, a single tone mapper can be used for RUs that are combined with a size of less than 242 tones.

[0298] Large-size RUs

[0299] According to one embodiment, in the case of a single STA in 320 / 160+160 MHz OFDMA transmission, large-size RU combining is only permitted within the primary 160 MHz or secondary 160 MHz. For example, the primary 160 MHz can be configured with the primary 80 MHz and secondary 80 MHz. The secondary 160 MHz can be configured with a channel that excludes the primary 160 MHz.

[0300] According to one embodiment, in the case of a single STA with 240 MHz OFDMA transmission, large size RU combining can only be allowed within 160 MHz, which can consist of two adjacent 80 MHz channels.

[0301] According to one embodiment, in the case of a single STA in a 160+80 MHz OFDMA transmission, large size RU combining may only be allowed within the contiguous 160 MHz or the remaining 80 MHz.

[0302] In 160 MHz OFDMA, large size RU combinations configured as shown in Table 21 can be supported.

[0303] [Table 21]

[0304] In 80 MHz OFDMA, large size RU combinations configured as shown in Table 22 can be supported.

[0305] [Table 22]

[0306] In 80 MHz non-OFDMA, large size RU combinations configured as shown in Table 23 can be supported. In 80 MHz non-OFDMA, puncturing can be applied. For example, one out of four 242 RUs can be punctured.

[0307] [Table 23]

[0308] In 160 MHz non-OFDMA, large size RU combinations configured as shown in Table 24 can be supported. In 160 MHz non-OFDMA, puncturing can be applied. For example, one out of eight 242 RUs can be punctured. As another example, one out of four 484 RUs can be punctured.

[0309] [Table 24]

[0310] In 240 MHz non-OFDMA, large size RU combinations configured as shown in Table 25 can be supported. In 240 MHz non-OFDMA, puncturing can be applied. For example, one out of six 484 RUs can be punctured. As another example, one out of three 996 RUs can be punctured.

[0311] [Table 25]

[0312] In 320MHz non-OFDMA, large size RU combinations configured as shown in Table 26 can be supported. In 320MHz non-OFDMA, puncturing can be applied. For example, one out of eight 484RUs can be punctured. As another example, one out of four 996RUs can be punctured.

[0313] [Table 26]

[0314] Hereinafter, the specification will explain the technical features related to the operating mode.

[0315] According to one embodiment, an EHT STA (hereinafter, EHT STA) (or HE STA) can operate in a 20 MHz channel width mode. In the 20 MHz channel width mode, the EHT STA can operate by reducing the operating channel width to 20 MHz using an operating mode indication (OMI).

[0316] According to one embodiment, an EHT STA (or an HE STA) can operate in an 80 MHz channel width mode. For example, in a 20 MHz channel width mode, an EHT STA can reduce its operating channel width to 80 MHz using an operating mode indication (OMI).

[0317] According to one embodiment, an EHT STA can support subchannel selective transmission (SST). A STA that supports SST can quickly select and switch to another channel during transmission to accommodate fading in a narrow subchannel.

[0318] The 802.11be standard (i.e., the EHT standard) can provide a higher data rate than the 802.11ax standard. The EHT (extreme high throughput) standard can support wide bandwidth (up to 320 MHz), 16 streams, and multi-band operation.

[0319] In addition, the EHT standard supports wide bandwidth (up to 320 MHz) and various preamble puncturing or multiple RU allocation in SU / MU transmission. Therefore, in the following specification, a method for configuring an EHT-SIG and a method for setting an interleaver for the same when transmitting a signal via preamble puncturing will be proposed. First, the PPDU of the EHT standard (i.e., EHT PPDU) will be described.

[0320] EHT PPDU Configuration

[0321] A new frame format can be used to support a transmission method based on the EHT standard. When a signal is transmitted over the 2.4 / 5 / 6 GHz band using the new frame format, not only a receiver supporting the EHT standard but also a conventional Wi-Fi receiver (or STA) (e.g., a receiver based on the 802.11n / ac / ax standard) can receive the EHT signal transmitted over the 2.4 / 5 / 6 GHz band.

[0322] The preamble of a PPDU based on the EHT standard can be configured in various ways. Hereinafter, an embodiment in which the preamble of a PPDU based on the EHT standard is configured will be described. Hereinafter, a PPDU based on the EHT standard will be described as an EHT PPDU. However, the EHT PPDU is not limited to the EHT standard. The EHT PPDU can include a PPDU based on not only the 802.11be standard (i.e., the EHT standard) but also a PPDU based on a new standard that is an advance / evolve / extension of the 802.11be standard.

[0323] FIG. 24 shows an example of an EHT PPDU.

[0324] 24, an EHT PPDU 2400 can include an L-part 2410 and an EHT-part 2420. The EHT PPDU 2400 can be configured in a format that supports backward compatibility. The EHT PPDU 2400 can also be transmitted to a single STA and / or multiple STAs. The EHT PPDU 2400 is an example of an MU-PPDU of the EHT standard.

[0325] The EHT PPDU 2400 may be configured such that the L-part 2410 is transmitted before the EHT-part 2420 for coexistence or backward compatibility with legacy STAs (STAs conforming to the 802.11n / ac / ax standards). For example, the L-part 2410 may include an L-STF, an L-LTF, and an L-SIG. For example, phase rotation may be applied to the L-part 2410.

[0326] According to one embodiment, EHT-part 2420 may include RL-SIG, U-SIG 2421, EHT-SIG 2422, EHT-STF, EHT-LTF, and EHT-data fields. Similar to the 11ax standard, RL-SIG may be included in EHT-part 2420 for reliability and range extension of L-SIG. The RL-SIG may be transmitted immediately after the L-SIG, or the L-SIG may be configured to be repeated.

[0327] For example, four extra subcarriers can be applied to the L-SIG and RL-SIG. The extra subcarriers can be configured as [-28, -27, 27, 28]. The extra subcarriers can be modulated in a BPSK manner. Coefficients of [-1-1-11] can be mapped to the extra subcarriers.

[0328] For example, the EHT-LTF can be configured as one of 1x EHT-LTF, 2x EHT-LTF, or 4x EHT-LTF. The EHT standard can support EHT-LTF for 16 spatial streams.

[0329] According to one embodiment, the U-SIG 2421 may include a version independent field and a version dependent field. An example of the U-SIG 2421 may be described with reference to FIG.

[0330] FIG. 25 shows an example of a U-SIG.

[0331] 25, U-SIG 2500 may correspond to U-SIG 2421 in FIG. 24. U-SIG 2500 may include a Version independent field 2510 and a Version dependent field 2520.

[0332] According to one embodiment, the version independent field 2510 may include a 3-bit version identifier indicating the EHT standard and a Wi-Fi version subsequent to the EHT standard. In other words, the version independent field 2510 may include 3-bit information regarding the EHT standard and a Wi-Fi version subsequent to the EHT standard.

[0333] According to an embodiment, the version independent field 2510 may further include a 1-bit DL / UL field, a field related to BSS color, and / or a field related to TXOP duration. In other words, the version independent field 2510 may further include 1-bit information related to DL / UL, information related to BSS color, and / or information related to TXOP duration.

[0334] According to an embodiment, the version dependent field 2520 may include a field / information related to a PPDU format type, a field / information related to a bandwidth, and / or a field / information related to an MCS. For example, the field / information related to the bandwidth may include puncturing information.

[0335] According to one embodiment, U-SIG2500 can be composed of two symbols. The two symbols can be jointly encoded. According to one embodiment, U-SIG2500 can be composed of 52 data tones and 4 pilot tones every 20 MHz. It can also be modulated in the same manner as HE-SIG-A of the HE standard. For example, U-SIG2500 can be modulated with BPSK and a code rate of 1 / 2.

[0336] According to one embodiment, U-SIG2500 can be transmitted duplexed in 20 MHz units during wide bandwidth transmission.

[0337] According to one embodiment, the U-SIG 2500 may further include MCS information of the EHT-SIG or information regarding the number of symbols of the EHT-SIG when transmitted to multiple users.

[0338] 24, EHT-SIG 2422 may include a version-dependent field that is not included in U-SIG 2421. In other words, EHT-SIG 2422 may include information overflowed from U-SIG 2421. For example, EHT-SIG 2422 may include information dependent on the version of the PPDU. As another example, EHT-SIG 2422 may include at least some of the fields included in HE-SIG-A of the HE standard.

[0339] According to one embodiment, the EHT-SIG 2422 may be composed of multiple OFDM symbols. According to one embodiment, the EHT-SIG 2422 may be modulated with various MCSs. For example, the EHT-SIG 2422 may be modulated based on MCS0 to MCS5.

[0340] According to one embodiment, the EHT-SIG 2422 may include a common field and a user-specific field. For example, the common field may include information about the spatial stream and / or information about RU allocation. For example, the user-specific field may include at least one user block field including information about the user. The user-specific field may include / indicate information about an information ID, MCS, and coding used for a specific user or STA. As an example, the user-specific field may include at least one user block field.

[0341] Preamble Puncturing pattern and multiple RU combinations

[0342] In the EHT standard, various preamble puncturing patterns and multiple RU combinations can be used. Examples of preamble puncturing and multiple RU combinations are described below.

[0343] An embodiment considering primary channel 20 (i.e., P20) will be described below. In this case, P20 can be assumed to be the lowest 20 MHz in terms of frequency. For example, P20 can be assumed to be the first 20 MHz channel (ch1) within 80 MHz [ch1, ch2, ch3, ch4]. According to one embodiment, the pattern can be configured / set to differ depending on the position of the primary channel.

[0344] (1) Preamble puncturing patterns for 80MHz bandwidth can be configured / set as shown in Table 27.

[0345] [Table 27]

[0346] Referring to Table 27, 40 MHz preamble puncturing can be performed with 80 MHz bandwidth, in which case the RU combination can be set to 242+242.

[0347] 20 MHz preamble puncturing can be implemented with 80 MHz bandwidth, in which case the RU combination can be set to 242+484 or 484+242.

[0348] (2) Preamble puncturing patterns for 160MHz bandwidth can be configured / set as shown in Table 28.

[0349] [Table 28]

[0350] Referring to Table 28, 40 MHz preamble puncturing can be performed with 160 MHz bandwidth, in which case the RU combination can be set to 484+996.

[0351] 20 MHz preamble puncturing can be implemented with 160 MHz bandwidth, in which case the RU combination can be set to 484+242+996.

[0352] (3) Preamble puncturing patterns for 240MHz bandwidth can be configured / set as shown in Table 29.

[0353] [Table 29]

[0354] Referring to Table 29, 80 MHz preamble puncturing can be performed with 240 MHz bandwidth, in which case the RU combination can be set to 996+996.

[0355] 40 MHz preamble puncturing can be implemented in 240 MHz bandwidth, in which case the RU combination can be set to 484+996+996.

[0356] (4) Preamble puncturing patterns for 320MHz bandwidth can be configured / set as shown in Table 30.

[0357] [Table 30]

[0358] Referring to Table 30, 80 MHz preamble puncturing can be performed with 320 MHz bandwidth, in which case the RU combination can be set to 996+996+996.

[0359] 40 MHz preamble puncturing can be implemented with 320 MHz bandwidth, in which case the RU combination can be set to 484+996+996+996.

[0360] The combinations of RU aggregation and preamble puncturing described above are only examples, and more diverse combinations can be used to improve spectrum efficiency.

[0361] EHT-SIG configuration using a combination of preamble puncturing pattern and multiple RUs

[0362] To support the detailed combination of multiple RU aggregation / preamble puncturing, the EHT-SIG can be transmitted as follows:

[0363] 1. According to one embodiment, the EHT-SIG can be configured in 80 MHz units. In this case, the EHT-SIG can be transmitted using the remaining RU / BW excluding the punctured portion.

[0364] 1-A. The EHT-SIG can be configured to include independent information in 80 MHz units for bandwidths greater than 80 MHz.

[0365] For example, for 160 MHz, the EHT-SIG can be configured with two content channels (i.e.,

[0012] ). That is, the EHT-SIG can be configured with content channel 1 and content channel 2.

[0366] For example, for 240 MHz, the EHT-SIG can be configured with three content channels (i.e.,

[0123] ). That is, the EHT-SIG can be configured with content channel 1, content channel 2, and content channel 3.

[0367] For example, for 320 MHz, the EHT-SIG can consist of four content channels (i.e., [1 2 3 4]). That is, the EHT-SIG can consist of content channel 1, content channel 2, content channel 3, and content channel 4.

[0368] 1-B. The 80 MHz EHT-SIG content channel can be transmitted in the following structure, taking into account various puncturing patterns within 80 MHz. Below, information on 20 MHz allocated within 80 MHz can be indicated as [x1 x2 x3 x4]. Here, x1 to x4 can be set to 1 or 0. x1 to x4 can be set to 1 if the corresponding 20 MHz channel is allocated. x1 to x4 can be set to 0 if the corresponding 20 MHz channel is not allocated. That is, x1 can indicate whether the first 20 MHz is allocated within the 80 MHz bandwidth or whether preamble puncturing is applied.

[0369] 1-Bi. 242+242 (i.e., [1 0 0 1], [1 0 1 0]) case

[0370] For example, at 80 MHz, the EHT-SIG can be transmitted as shown in FIG.

[0371] Figure 26 shows an example of EHT-SIG at 80 MHz.

[0372] Referring to Figure 26, preamble puncturing can be performed in a [1 0 0 1] structure. EHT-SIG1 can be transmitted over the first 20 MHz and the last 20 MHz within 80 MHz.

[0373] 1-B-ii.242+484 (i.e., [1 0 1 1], [1 1 0 1], [1 1 1 0]) case

[0374] For example, at 80 MHz, the EHT-SIG can be transmitted as shown in FIG.

[0375] FIG. 27 shows another example of EHT-SIG at 80 MHz.

[0376] Referring to Figure 27, preamble puncturing can be performed in a [1 0 1 1] structure. EHT-SIG1 can be transmitted over the first 20 MHz, the third 20 MHz, and the last 20 MHz within 80 MHz.

[0377] iii. In the detailed example, the first 242 RU (i.e., the 242 RU in the lowest frequency band) can be assumed to be the primary channel. In this case, the 20 MHz for the allocated 242 RU can be represented as 1. The 20 MHz corresponding to the punctured 242 RU can be represented as 0.

[0378] iv. The detailed example is merely an example, and the pattern display can be set differently depending on the position of the primary channel.

[0379] v. The EHT-SIG can be transmitted using the remaining BW excluding punctured BW (configured in 20 MHz units) within 80 MHz.

[0380] vi. According to the puncturing pattern, EHT-SIG can be transmitted using 40 / 60 MHz, and information can be transmitted using 52+52 / 52+108 data tones (data tones excluding pilot), respectively. At this time, EHT-SIG information bits carried on the data tones can be encoded through one BCC and BCC interleaver.

[0381] For example, for interleaving the information bits carried on the 52+52 / 52+108 data tone, Ncol and Nrow of the BCC interleaver can be set as shown in Table 31.

[0382] [Table 31]

[0383] Referring to Table 31, when DCM is applied (w / DCM) and when DCM is not applied (W / oDCM), the Ncol and Nrow values ​​can be set differently.

[0384] For example, if DCM is not applied to 52+52 tone, the value of Ncol can be set to 13 and the value of Nrow can be set to 8.

[0385] For example, when DCM is applied to 52+52 tone, the value of Ncol can be set to 13 and the value of Nrow can be set to 4.

[0386] For example, if DCM is not applied to 52+108 tone, the value of Ncol can be set to 32 and the value of Nrow can be set to 5.

[0387] For example, if DCM is not applied to 52+108 tone, the value of Ncol can be set to 20 and the value of Nrow can be set to 8.

[0388] For example, if DCM is not applied to 52+108 tone, the value of Ncol can be set to 16 and the value of Nrow can be set to 10.

[0389] For example, when DCM is applied to 52+108 tone, the value of Ncol can be set to 16 and the value of Nrow can be set to 5.

[0390] For example, when DCM is applied to 52+108 tone, the value of Ncol can be set to 10 and the value of Nrow can be set to 8.

[0391] 1-C.STA can check the puncturing pattern of the EHT-SIG using information about the puncturing pattern configured in 80 MHz units of the U-SIG or BW information.

[0392] 1-D. Unlike the detailed embodiment, the EHT-SIG can be configured in 80 MHz units and transmitted in the following manner.

[0393] 1-Di.EHT-SIG can be configured with a 20 MHz EHT-SIG content channel within 80 MHz. The content channel can be configured as follows:

[0394] The 1-Di-1.EHT-SIG can be configured with a common field and a user-specific field regardless of the SU / MU PPDU. For example, the content channel can be configured differently depending on the SU / MU. For example, the SU PPDU can be configured with only a common field.

[0395] There can be two 80 MHz EHT-SIG content channels. For example, each content channel can contain different information. The two content channels can be repeated within 80 MHz in 40 MHz increments and transmitted in the structure shown in Figure 28.

[0396] FIG. 28 shows another example of EHT-SIG at 80 MHz.

[0397] Referring to FIG. 28, the EHT-SIG can be composed of two content channels (EHT-SIG1 and EHT-SIG2). 80 MHz can be divided into 40 MHz units. EHT-SIG1 and EHT-SIG2 can be transmitted over the first 40 MHz. EHT-SIG1 and EHT-SIG2 can be transmitted over the second 40 MHz. That is, the two content channels can be repeated and transmitted within 80 MHz in 40 MHz units.

[0398] If 1-Di-3.BW>80MHz, the EHT-SIG field can be configured with two different content channels per 80MHz.

[0399] 1-Di-3-a. At 160 MHz, EHT-SIG can be transmitted in a structure as shown in Figure 29.

[0400] Figure 29 shows an example of EHT-SIG at 160 MHz.

[0401] Referring to Figure 29, the EHT-SIG can be composed of four content channels (EHT-SIG1 to EHT-SIG4). 160 MHz can be divided into 80 MHz units. EHT-SIG1 and EHT-SIG2 can be transmitted over the first 80 MHz. EHT-SIG1 and EHT-SIG2 can be transmitted repeatedly within the 80 MHz in 40 MHz units.

[0402] EHT-SIG3 and EHT-SIG4 can be transmitted over the second 80 MHz. EHT-SIG3 and EHT-SIG4 can be repeatedly transmitted within 80 MHz in 40 MHz increments.

[0403] 1-Di-3-b. At 240 MHz, EHT-SIG can be transmitted in a structure as shown in Figure 30.

[0404] Figure 30 shows an example of EHT-SIG at 240 MHz.

[0405] Referring to Figure 30, the EHT-SIG can be composed of six content channels (EHT-SIG1 to EHT-SIG6). 240 MHz can be divided into 80 MHz units. EHT-SIG1 and EHT-SIG2 can be transmitted over the first 80 MHz. EHT-SIG1 and EHT-SIG2 can be transmitted repeatedly within the 80 MHz in 40 MHz units.

[0406] EHT-SIG3 and EHT-SIG4 can be transmitted over the second 80 MHz. EHT-SIG3 and EHT-SIG4 can be repeatedly transmitted within 80 MHz in 40 MHz increments.

[0407] EHT-SIG5 and EHT-SIG6 can be transmitted over the third 80 MHz. EHT-SIG5 and EHT-SIG6 can be transmitted repeatedly within the 80 MHz band in 40 MHz increments.

[0408] 1-Di-3-c. At 320 MHz, EHT-SIG can be transmitted in a structure as shown in Figure 31.

[0409] Figure 31 shows an example of EHT-SIG at 320 MHz.

[0410] Referring to Figure 31, the EHT-SIG can be composed of eight content channels (EHT-SIG1 to EHT-SIG8). 320 MHz can be divided into 80 MHz units. EHT-SIG1 and EHT-SIG2 can be transmitted over the first 80 MHz. EHT-SIG1 and EHT-SIG2 can be transmitted repeatedly within the 80 MHz in 40 MHz units.

[0411] EHT-SIG3 and EHT-SIG4 can be transmitted over the second 80 MHz. EHT-SIG3 and EHT-SIG4 can be repeatedly transmitted within 80 MHz in 40 MHz increments.

[0412] EHT-SIG5 and EHT-SIG6 can be transmitted over the third 80 MHz. EHT-SIG5 and EHT-SIG6 can be transmitted repeatedly within the 80 MHz band in 40 MHz increments.

[0413] EHT-SIG7 and EHT-SIG8 can be transmitted over the fourth 80 MHz. EHT-SIG5 and EHT-SIG6 can be transmitted repeatedly within the 80 MHz band in 40 MHz increments.

[0414] 1-D-ii. According to one embodiment, the EHT-SIG content channel / EHT-SIG field can be configured in 20 MHz units. The EHT-SIG can be configured and transmitted as follows:

[0415] 1-D-ii-1. EHT-SIG (or EHT-SIG content channel) can be transmitted in 20 MHz increments within 80 MHz.

[0416] 1-D-ii-1-a. At 80 MHz, EHT-SIG can be transmitted in a structure as shown in Figure 32.

[0417] FIG. 32 shows another example of EHT-SIG at 80 MHz.

[0418] 32, the EHT-SIG can be configured with one content channel (EHT-SIG1). EHT-SIG1 can be configured with 20 MHz and can be replicated and transmitted in 20 MHz increments within 80 MHz.

[0419] 1-D-ii-2. According to one embodiment, EHT-SIGs (or EHT-SIG content channels) can be configured to differ from each other in 80 MHz increments.

[0420] 1-D-ii-2-a. At 160 MHz, EHT-SIG can be transmitted in a structure as shown in Figure 33.

[0421] FIG. 33 shows another example of EHT-SIG at 160 MHz.

[0422] 33, the EHT-SIG can be configured with two content channels (EHT-SIG1 and EHT-SIG2). The 160 MHz can be divided into 80 MHz units.

[0423] EHT-SIG1 can be transmitted over the first 80 MHz. EHT-SIG1 is configured in 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz.

[0424] EHT-SIG2 can be transmitted over the second 80 MHz. EHT-SIG2 is configured at 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz band.

[0425] 1-D-ii-2-b. At 240 MHz, EHT-SIG can be transmitted in a structure such as that shown in Figure 34.

[0426] FIG. 34 shows another example of EHT-SIG at 240 MHz.

[0427] 34, the EHT-SIG can be configured with three content channels (EHT-SIG1 to EHT-SIG3). 240 MHz can be divided into 80 MHz units.

[0428] EHT-SIG1 can be transmitted over the first 80 MHz. EHT-SIG1 is configured in 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz.

[0429] EHT-SIG2 can be transmitted over the second 80 MHz. EHT-SIG2 is configured at 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz band.

[0430] EHT-SIG3 can be transmitted over the third 80 MHz. EHT-SIG3 is configured in 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz band.

[0431] 1-D-ii-2-c. At 320 MHz, EHT-SIG can be transmitted in a structure such as that shown in Figure 35.

[0432] FIG. 35 shows another example of EHT-SIG at 320 MHz.

[0433] 35, the EHT-SIG can be configured with four content channels (EHT-SIG1 to EHT-SIG4). The 320 MHz can be divided into 80 MHz units.

[0434] EHT-SIG1 can be transmitted over the first 80 MHz. EHT-SIG1 is configured in 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz.

[0435] EHT-SIG2 can be transmitted over the second 80 MHz. EHT-SIG2 is configured at 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz band.

[0436] EHT-SIG3 can be transmitted over the third 80 MHz. EHT-SIG3 is configured in 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz band.

[0437] EHT-SIG4 can be transmitted over the fourth 80 MHz. EHT-SIG4 is configured in 20 MHz and can be replicated and transmitted in 20 MHz increments within the 80 MHz band.

[0438] 1-D-ii-3. Unlike the detailed embodiment, when transmitting an SU, the EHT-SIG (or EHT-SIG content channel) can be duplicated and transmitted in 20 MHz units.

[0439] 1-D-ii-3-a. For example, at 320 MHz, the EHT-SIG (or EHT-SIG content channel) can be configured and transmitted as shown in FIG.

[0440] FIG. 36 shows another example of EHT-SIG at 320 MHz.

[0441] 36, the EHT-SIG can be configured with one content channel (EHT-SIG1). EHT-SIG1 can be configured with 20 MHz and can be replicated and transmitted in 20 MHz increments within 320 MHz.

[0442] 1-D-ii-3-b. As shown in FIG. 36, EHT-SIG can be configured and transmitted in the same manner for 160 MHz and 240 MHz.

[0443] 1-D-ii-4. According to the detailed embodiment, an existing interleaver can be used, and there is an advantage that no additional hardware modifications are required.

[0444] 1-E. EHT-SIG can be configured differently according to SU PPDU and MU PPDU.

[0445] For example, in the case of a SU transmission, the EHT-SIG may be configured in a 20 MHz EHT-SIG content channel. The EHT-SIG may be duplicated and transmitted within the transmission BW.

[0446] As another example, in the case of MU-PPDU, EHT-SIG can be configured per 80 MHz or per 160 MHz, and can be transmitted using two independent EHT-SIG content channels.

[0447] 1-Ei. Below, an example of the configuration of the EHT-SIG when transmitting at 240 MHz can be described, where 1, 2, 3, 4, 5, and 6 can represent independent 20 MHz content channels.

[0448] 1-Ei-1. The EHT-SIG of SU PPDU can be configured in the structure of [111111111111]. That is, in SU transmission, the EHT-SIG can be duplicated and transmitted in one content channel.

[0449] 1-Ei-2. The EHT-SIG of MU PPDU can consist of two content channels.

[0450] For example, if an EHT-SIG is configured per 80 MHz, the EHT-SIG can be configured in the structure of [121234345656].

[0451] As another example, if an EHT-SIG is configured per 160 MHz, the EHT-SIG can be configured in the structure of [121212123434].

[0452] 2. According to one embodiment, the EHT-SIG (or EHT-SIG content channel) can be configured in 20 MHz units and can be configured and transmitted as follows:

[0453] 2-A. For example, the EHT-SIG can be configured with independent SIGs containing different information in 160 MHz units, and in this case, the EHT-SIGs constituting each 160 MHz can be configured as follows.

[0454] 2-Ai. EHT-SIG can be configured with an EHT-SIG content channel configured at 20 MHz within 80 MHz. The EHT-SIG content channel can be configured as two 80 MHz channels. Each content channel can contain different information. In addition, the two content channels can be repeated within 80 MHz in 40 MHz increments and transmitted in the following structure:

[0455] 2-Ai-1. For example, at 80 MHz, the EHT-SIG (or EHT-SIG content channel) can be configured and transmitted as shown in FIG.

[0456] FIG. 37 shows another example of EHT-SIG at 80 MHz.

[0457] Referring to FIG. 37, the EHT-SIG can be composed of two content channels (EHT-SIG1 and EHT-SIG2). 80 MHz can be divided into 40 MHz units. EHT-SIG1 and EHT-SIG2 can be transmitted over the first 40 MHz. EHT-SIG1 and EHT-SIG2 can be transmitted over the second 40 MHz. That is, the two content channels can be repeated and transmitted within 80 MHz in 40 MHz units.

[0458] 2-Ai-2. For example, at 160 MHz, the EHT-SIG (or EHT-SIG content channel) can be configured and transmitted as shown in FIG.

[0459] FIG. 38 shows another example of EHT-SIG at 160 MHz.

[0460] Referring to FIG. 38, the EHT-SIG can be composed of two content channels (EHT-SIG1 and EHT-SIG2). 160 MHz can be divided into 80 MHz units. EHT-SIG1 and EHT-SIG2 can be transmitted over the first 80 MHz. EHT-SIG1 and EHT-SIG2 can be transmitted over the second 80 MHz. That is, the two content channels can be repeated and transmitted within 80 MHz in 40 MHz units.

[0461] If 2-Ai-3.BW>160MHz, EHT-SIGs can be configured to be different from each other in 160MHz increments. For example, two EHT-SIG content channels within 160MHz can contain different information. The two content channels can be configured as follows, repeated within 80MHz in 40MHz increments:

[0462] 2-Ai-2. For example, at 240 MHz, the EHT-SIG (or EHT-SIG content channel) can be configured and transmitted as shown in FIG.

[0463] FIG. 39 shows another example of EHT-SIG at 240 MHz.

[0464] Referring to FIG. 39, EHT-SIGs can be configured to differ from each other in 160 MHz increments.

[0465] Two content channels (i.e., EHT-SIG1 and EHT-SIG2) can be transmitted over the first 160 MHz of the 240 MHz band. The two content channels (i.e., EHT-SIG1 and EHT-SIG2) can be transmitted repeatedly within 80 MHz (or 160 MHz) in 40 MHz increments.

[0466] In addition, two content channels (i.e., EHT-SIG3 and EHT-SIG4) can be transmitted over the remaining 80 MHz. The two content channels (i.e., EHT-SIG3 and EHT-SIG4) can be transmitted repeatedly within 80 MHz in 40 MHz increments. Therefore, at 240 MHz, the EHT-SIG can consist of four content channels.

[0467] 2-Ai-3. For example, at 320 MHz, EHT-SIG (or EHT-SIG content channel) can be configured and transmitted as shown in FIG.

[0468] FIG. 40 shows another example of EHT-SIG at 320 MHz.

[0469] Referring to FIG. 40, the EHT-SIGs can be configured to differ from each other in 160 MHz increments.

[0470] Two content channels (i.e., EHT-SIG1 and EHT-SIG2) can be transmitted over the first 160 MHz of the 320 MHz band. The two content channels (i.e., EHT-SIG1 and EHT-SIG2) can be transmitted repeatedly within 80 MHz (or 160 MHz) in 40 MHz increments.

[0471] In addition, two content channels (i.e., EHT-SIG3 and EHT-SIG4) can be transmitted over the second 160 MHz. The two content channels (i.e., EHT-SIG3 and EHT-SIG4) can be transmitted repeatedly within 80 MHz (or 160 MHz) in 40 MHz increments. Therefore, at 320 MHz, the EHT-SIG can consist of four content channels.

[0472] The operation of the transmitting STA and the receiving STA according to the detailed embodiment can be explained below.

[0473] FIG. 41 is a flowchart illustrating the operation of the receiving STA.

[0474] 41, in step S4110, a 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.

[0475] According to one embodiment, the PPDU may be received based on a 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.

[0476] According to one embodiment, the first signal field may include information related to the EHT PPDU. For example, the first signal field may include information about the version of the PPDU. The first signal field may also include information about a basic service set (BSS) color and / or information about a transmission opportunity (TXOP).

[0477] For example, the first signal field may include 3-bit information related to the version of the PPDU. The 3-bit information related to the version of the PPDU may include information indicating that the EHT PPDU is a PPDU based on the EHT standard. Furthermore, the 3-bit information related to the version of the PPDU may include information for distinguishing PPDUs based on standards subsequent to the 802.11be standard (i.e., the EHT standard). In other words, the 3-bit information related to the version of the PPDU may include information for distinguishing PPDUs based on the EHT standard and standards determined / created / established after the EHT standard. That is, the 3-bit information related to the version of the PPDU may include information indicating that the PPDU is a PPDU based on the EHT standard or a PPDU based on a standard subsequent to the EHT standard.

[0478] According to one embodiment, the PPDU type and the PPDU version may be distinguished from each other. The PPDU type may be used to distinguish between PPDUs conforming to the EHT standard and standards prior to the EHT standard (e.g., 802.11n / ac / ax). In contrast, the PPDU version may be used to distinguish between PPDUs conforming to the EHT standard and standards subsequent to the EHT standard. For example, the PPDU version may be referred to in various ways. For example, the PPDU version may be referred to as a PHY version, a packet version, a packet identifier, a Wi-Fi version, etc.

[0479] According to one embodiment, the first signal field may further include first CRC (cyclic redundancy check) bits and first tail bits for the first signal field. The first CRC bits may be used for a validity check by the receiving STA. For example, the first CRC bits may be configured with 4 bits. For example, the first tail bits may be configured with 6 bits.

[0480] According to one embodiment, the second signal field may be received consecutively to the first signal field. For example, the first signal field may be received over two symbols. The second signal field may be received over at least one symbol consecutive to the two symbols.

[0481] According to one embodiment, a PPDU can be configured to be transmitted to a single user. For example, a data field included in the PPDU can include only information to be transmitted to a single user. Therefore, the PPDU can be configured to be transmitted only to a receiving STA. For example, a data field included in the PPDU can include only information to be transmitted to a receiving STA.

[0482] In this case, the second signal field may be duplicated in units of a second bandwidth within the first bandwidth. For example, the second bandwidth may be set to 20 MHz.

[0483] For example, the second signal field may be configured with one content channel (hereinafter, referred to as the first content channel). The first content channel may be configured by being replicated in units of the second bandwidth within the first bandwidth. That is, the first content channel may be configured by being replicated in units of 20 MHz within the first bandwidth, which is the entire bandwidth of the PPDU. Therefore, the first content channel may be configured in units of 20 MHz within the entire bandwidth of the PPDU.

[0484] According to one embodiment, the second signal field may include a general field and a user-specific field. For example, the general field may include information overflowed from the first signal field. If the PPDU is configured to be transmitted to a single user, the user-specific field may include only a subfield related to one user.

[0485] In step S4120, the receiving STA can decode the PPDU based on the first SIGNAL field and the second SIGNAL field.

[0486] Unlike the embodiment described above, the PPDU can be configured to be transmitted to multiple users. In this case, the second signal field can be configured in 80 MHz units. The second signal field can be configured with two content channels per 80 MHz.

[0487] For example, in a 160 MHz PPDU, the 160 MHz can be divided into two 80 MHz segments.

[0488] The second signal field in the first 80 MHz can be configured with a first content channel and a second content channel. The first content channel and the second content channel can each be configured with 20 MHz. The first content channel and the second content channel can be configured sequentially within the first 80 MHz. That is, the second signal field can be configured in the following order within the first 80 MHz: first content channel, second content channel, first content channel, and second content channel.

[0489] The second signal field in the second 80 MHz can be configured with a third content channel and a fourth content channel. The third content channel and the fourth content channel can each be configured with 20 MHz. The third content channel and the fourth content channel can be configured sequentially within the second 80 MHz. That is, the second signal field can be configured 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.

[0490] FIG. 42 is a flowchart illustrating the operation of the transmitting STA.

[0491] 42, in 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.

[0492] According to one embodiment, the first signal field may include information related to the EHT PPDU. For example, the first signal field may include information about the PPDU version. As an example, the first signal field may include 3-bit information about the PPDU version. The first signal field may also include information about a basic service set (BSS) color and / or information about a transmission opportunity (TXOP).

[0493] According to one embodiment, a PPDU can be configured to be transmitted to a single user. For example, a data field included in the PPDU can include only information to be transmitted to a single user. Therefore, the PPDU can be configured to be transmitted only to a receiving STA. For example, a data field included in the PPDU can include only information to be transmitted to a receiving STA.

[0494] In this case, the second signal field may be duplicated in units of a second bandwidth within the first bandwidth. For example, the second bandwidth may be set to 20 MHz.

[0495] For example, the second signal field may be configured with one content channel (hereinafter, referred to as the first content channel). The first content channel may be configured by being replicated in units of the second bandwidth within the first bandwidth. That is, the first content channel may be configured by being replicated in units of 20 MHz within the first bandwidth, which is the entire bandwidth of the PPDU. Therefore, the first content channel may be configured in units of 20 MHz within the entire bandwidth of the PPDU.

[0496] According to one embodiment, the second signal field may include a general field and a user-specific field. For example, the general field may include information overflowed from the first signal field. If the PPDU is configured to be transmitted to a single user, the user-specific field may include only a subfield related to one user.

[0497] In step S4220, the transmitting STA may transmit a PPDU. According to one embodiment, the transmitting STA may transmit a PPDU including a first signal field, a second signal field, and a data field.

[0498] According to one embodiment, the PPDU may be transmitted based on a first bandwidth, for example, the entire bandwidth of the PPDU may be set to the first bandwidth.

[0499] According to one embodiment, the second signal field may be transmitted consecutively to the first signal field. For example, the first signal field may be transmitted over two symbols. The second signal field may be transmitted over at least one symbol consecutive to the two symbols.

[0500] Unlike the detailed embodiment, the PPDU can be configured to be transmitted to multiple users. In this case, the second signal field can be configured in 80 MHz units. The second signal field can be configured with two content channels per 80 MHz.

[0501] For example, in a 160 MHz PPDU, the 160 MHz can be divided into two 80 MHz segments.

[0502] The second signal field in the first 80 MHz can be configured with a first content channel and a second content channel. The first content channel and the second content channel can each be configured with 20 MHz. The first content channel and the second content channel can be configured sequentially within the first 80 MHz. That is, the second signal field can be configured in the following order within the first 80 MHz: first content channel, second content channel, first content channel, and second content channel.

[0503] The second signal field in the second 80 MHz can be configured with a third content channel and a fourth content channel. The third content channel and the fourth content channel can each be configured with 20 MHz. The third content channel and the fourth content channel can be configured sequentially within the second 80 MHz. That is, the second signal field can be configured 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.

[0504] Therefore, the transmitting STA can transmit a PPDU configured to be transmitted to multiple users as detailed above to the receiving STA.

[0505] The technical features of the present specification may be applied to various devices and methods. For example, the technical features of the present specification may be implemented / supported by the device of FIG. 1 and / or FIG. 19. For example, the technical features of the present specification may be applied to only a part of FIG. 1 and / or FIG. 19. For example, the technical features of the present specification may be implemented based on the processing chips 114 and 124 of FIG. 1, or based on the processors 111 and 121 and memories 112 and 122 of FIG. 1, or based on the processor 610 and memory 620 of FIG. 19. For example, the device herein may include a processor and a memory coupled to the processor, wherein the processor receives a PPDU (Physical Layer Protocol Data Unit) including a first signal field, a second signal field, and a data field, the PPDU being configured to be transmitted to a single user, the PPDU being received based on a first bandwidth, the second signal field being configured as one content channel, the one content channel being configured by being replicated in a second bandwidth unit within the first bandwidth, and the processor may be configured to decode the PPDU based on the first signal field and the second signal field.

[0506] The technical features of the present specification may be embodied based on a computer-readable medium (CRM). For example, the CRM proposed by the present specification may store instructions to perform operations including receiving a physical layer protocol data unit (PPDU) including a first signal field, a second signal field, and a data field, the PPDU being configured to be transmitted to a single user, the PPDU being received based on a first bandwidth, the second signal field being configured as one content channel, and the one content channel being configured by duplicating the content channel by a second bandwidth unit within the first bandwidth; and decoding the PPDU based on the first signal field and the second signal field. The instructions stored in the CRM of the present specification may be executed by at least one processor. The at least one processor associated with the CRM of the present specification may be processors 111 and 121 or processing chips 114 and 124 of FIG. 1, or processor 610 of FIG. 19. Meanwhile, the CRM in this specification may be the memories 112 and 122 in FIG. 1, the memory 620 in FIG. 19, or a separate external memory / storage medium / disk.

[0507] The technical features of the present specification described above can be applied to various applications and business models, for example, for wireless communication in devices supporting artificial intelligence (AI).

[0508] Artificial intelligence refers to the field that studies artificial intelligence or the methodologies that can create it, while machine learning refers to the field that defines various problems that are dealt with in the field of artificial intelligence and studies the methodologies to solve them. Machine learning can also be defined as an algorithm that improves its performance for any task through constant experience with that task.

[0509] An artificial neural network (ANN) is a model used in machine learning and can refer to a general model with problem-solving capabilities that is composed of artificial neurons (nodes) that form a network through synaptic connections. An artificial neural network can be defined by the connection pattern between neurons in different layers, a learning process that updates model parameters, and an activation function that generates output values.

[0510] An artificial neural network can have an input layer, an output layer, and optionally one or more hidden layers. Each layer contains one or more neurons, and the artificial neural network can include synapses connecting the neurons. In an artificial neural network, each neuron can output a function value of an activation function in response to an input signal, weights, and biases input via a synapse.

[0511] Model parameters are parameters determined through learning, such as synaptic connection weights and neuron biases, while hyperparameters are parameters that must be set before learning in a machine learning algorithm, such as the learning rate, number of iterations, mini-batch size, and initialization function.

[0512] The goal of training an artificial neural network can be considered as determining model parameters that minimize a loss function. The loss function can be used as an index for determining optimal model parameters during the training process of the artificial neural network.

[0513] Machine learning can be classified into supervised learning, unsupervised learning, and reinforcement learning depending on the learning method.

[0514] Supervised learning refers to a method of training an artificial neural network when labels for training data are given, and a label can refer to the correct answer (or result value) that the artificial neural network should infer when training data is input to the artificial neural network. Unsupervised learning can refer to a method of training an artificial neural network when labels for training data are not given. Reinforcement learning can refer to a learning method in which an agent defined in an environment is trained to select an action or action sequence that maximizes cumulative compensation in each state.

[0515] Machine learning realized by a deep neural network (DNN) with multiple hidden layers in an artificial neural network is sometimes called deep learning, and deep learning is a part of machine learning. In the following, machine learning is used to include deep learning.

[0516] Furthermore, the above-described technical features can be applied to wireless communication of a robot.

[0517] A robot can refer to a machine that automatically processes or operates a given task using its own capabilities. In particular, a robot that has the ability to recognize its environment, make its own decisions, and take action can be called an intelligent robot.

[0518] Robots can be classified into industrial, medical, domestic, military, etc. depending on their intended use and field. Robots are equipped with actuators or motors that actuate the robot joints and perform various physical actions. Mobile robots have wheels, brakes, propellers, etc. that actuate the robots, allowing them to move on the ground or fly in the air.

[0519] Furthermore, the above-described technical features can be applied to a device that supports augmented reality.

[0520] Augmented reality is a general term for virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology provides real-world objects and backgrounds only as CG images, AR technology provides virtual CG images on top of images of real objects, and MR technology is a computer graphics technology that combines and presents virtual objects in the real world.

[0521] MR technology is similar to AR technology in that it displays both real and virtual objects, but it differs in that AR technology uses virtual objects to complement real objects, while MR technology uses virtual objects and real objects in an equal manner.

[0522] XR technology can be applied to HMDs (Head-Mount Displays), HUDs (Head-Up Displays), mobile phones, tablet PCs, laptops, desktops, TVs, digital signage, etc., and devices to which XR technology is applied can be called XR devices.

[0523] The claims and the like described in this specification may be combined in various ways. For example, the technical features of the method claims of this specification may be combined to realize an apparatus, and the technical features of the apparatus claims of this specification may be combined to realize a method. Furthermore, the technical features of the method claims of this specification and the technical features of the apparatus claims of this specification may be combined to realize an apparatus, and the technical features of the method claims of this specification and the technical features of the apparatus claims of this specification may be combined to realize a method.

Claims

1. A method in a transmitting station (STA) in a wireless local area network (WLAN), comprising: generating an Extremely High Throughput Physical Protocol Data Unit (EHT PPDU) including a Legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field, a universal signal (U-SIG) field, an extreme high throughput signal (EHT-SIG) field, and a data field; the L-SIG field includes a length field set to a value that satisfies the condition that when the length field is divided by 3, the remainder is 0; the remainder is used to distinguish the EHT PPDU from a HE (High Efficiency) PPDU; the U-SIG field includes a version-independent field followed by a version-dependent field; The version independent field includes 3-bit information related to a PHY (physical) version of the EHT PPDU, The value of the 3-bit information is used to identify a PHY version starting with EHT, The version dependent field contains type information associated with the EHT PPDU; The U-SIG field has a length of 2 symbols; The EHT-SIG field is contiguous with the U-SIG field; Based on the EHT PPDU being associated with a SU transmission, the EHT-SIG field has a single EHT-SIG content channel regardless of the bandwidth of the EHT PPDU; transmitting the EHT PPDU; The U-SIG field includes a Punctured Channel Information field that includes a 4-bit bitmap indicating whether one, two, or three of four 20 MHz subchannels of an 80 MHz frequency subblock are punctured; the four bits of the four-bit bitmap are arranged in ascending order from the lowest 20 MHz subchannel to the highest 20 MHz subchannel; a first bit indicating whether the lowest 20 MHz subchannel is punctured; The second bit indicates whether the second lowest 20 MHz subchannel is punctured; The third bit indicates whether the third lowest 20 MHz subchannel is punctured; The fourth bit indicates whether the highest 20 MHz subchannel is punctured; The method of claim 1, wherein the single EHT-SIG content channel is transmitted in each unpunctured 20 MHz subchannel.

2. The method of claim 1 , wherein the EHT-SIG field includes a general field and a user-specific field.

3. The method of claim 1 , wherein the EHT-SIG field has a length of at least one symbol.

4. A method in a receiving station (STA) in a wireless local area network (WLAN), comprising: receiving an Extremely High Throughput Physical Protocol Data Unit (EHT PPDU) including a Legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field, a universal signal (U-SIG) field, an extreme high throughput signal (EHT-SIG) field, and a data field; the L-SIG field includes a length field set to a value that satisfies the condition that when the length field is divided by 3, the remainder is 0; the remainder is used to distinguish the EHT PPDU from a HE (High Efficiency) PPDU; the U-SIG field includes a version-independent field followed by a version-dependent field; The version independent field includes 3-bit information related to a PHY (physical) version of the EHT PPDU, and the value of the 3-bit information is used to identify a PHY version starting with the EHT; The version dependent field contains type information associated with the EHT PPDU; The U-SIG field has a length of 2 symbols; The EHT-SIG field is contiguous with the U-SIG field; Based on the EHT PPDU being associated with a SU transmission, the EHT-SIG field has a single EHT-SIG content channel regardless of the bandwidth of the EHT PPDU; decoding the EHT PPDU based on the U-SIG field and the EHT-SIG field; The U-SIG field includes a Punctured Channel Information field that includes a 4-bit bitmap indicating whether one, two, or three of four 20 MHz subchannels of an 80 MHz frequency subblock are punctured; the four bits of the four-bit bitmap are arranged in ascending order from the lowest 20 MHz subchannel to the highest 20 MHz subchannel; a first bit indicating whether the lowest 20 MHz subchannel is punctured; The second bit indicates whether the second lowest 20 MHz subchannel is punctured; The third bit indicates whether the third lowest 20 MHz subchannel is punctured; The fourth bit indicates whether the highest 20 MHz subchannel is punctured; The method of claim 1, wherein the single EHT-SIG content channel is received in each unpunctured 20 MHz subchannel.

5. The method of claim 4 , wherein the EHT-SIG field includes a general field and a user-specific field.

6. The method of claim 4 , wherein the EHT-SIG field has a length of at least one symbol.

7. A station (STA) in a wireless local area network (WLAN), a transceiver adapted to transmit a signal; a processor adapted to control the transceiver; The processor: generating an EHT PPDU (Extremely High Throughput Physical Protocol Data Unit) including an L-SIG (Legacy signal) field, an RL-SIG (repeated legacy signal) field, a U-SIG (universal signal) field, an EHT-SIG (extremely high throughput signal) field, and a data field; the L-SIG field includes a length field set to a value that satisfies the condition that when the length field is divided by 3, the remainder is 0; the remainder is used to distinguish the EHT PPDU from a HE (High Efficiency) PPDU; the U-SIG field includes a version-independent field followed by a version-dependent field; The version independent field includes 3-bit information related to a PHY (physical) version of the EHT PPDU, The value of the 3-bit information is used to identify a PHY version starting with EHT, The version dependent field contains type information associated with the EHT PPDU; The U-SIG field has a length of 2 symbols; The EHT-SIG field is contiguous with the U-SIG field; Based on the EHT PPDU being associated with an SU transmission, the EHT-SIG field has a single EHT-SIG content channel regardless of the bandwidth of the EHT PPDU; further adapted to transmit the EHT PPDU via the transceiver; The U-SIG field includes a Punctured Channel Information field that includes a 4-bit bitmap indicating whether one, two, or three of four 20 MHz subchannels of an 80 MHz frequency subblock are punctured; the four bits of the four-bit bitmap are arranged in ascending order from the lowest 20 MHz subchannel to the highest 20 MHz subchannel; a first bit indicating whether the lowest 20 MHz subchannel is punctured; The second bit indicates whether the second lowest 20 MHz subchannel is punctured; The third bit indicates whether the third lowest 20 MHz subchannel is punctured; The fourth bit indicates whether the highest 20 MHz subchannel is punctured; The single EHT-SIG content channel is transmitted in each unpunctured 20 MHz subchannel, STA.

8. The STA of claim 7, wherein the EHT-SIG field includes a general field and a user-specific field.

9. The STA of claim 7 , wherein the EHT-SIG field has a length of at least one symbol.

10. A method in a receiving station (STA) in a wireless local area network (WLAN), comprising: receiving a Physical layer Protocol Data Unit (PPDU) including a universal signal (U-SIG) field, an extreme high throughput signal (EHT-SIG) field, and a data field; The EHT-SIG field is contiguous 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; The U-SIG field is received over two symbols; The PPDU is transmitted to a single user; The EHT-SIG field is configured as one content channel, The one content channel is configured by duplicating in units of 20 MHz, Information regarding preamble puncturing applied to the PPDU within 80 MHz is represented as [x1 x2 x3 x4], Each of x1, x2, x3, and x4 indicates whether preamble puncturing is applied in the corresponding 20 MHz channel; Each of x1, x2, x3, and x4 is set to 0 or 1; Each of x1, x2, x3, and x4 is set to 0 if the corresponding 20 MHz channel is punctured; the information regarding the preamble puncturing is included in the U-SIG field; decoding the PPDU based on the U-SIG field and the EHT-SIG field.

11. A method in a transmitting station (STA) in a wireless local area network (WLAN), comprising: generating a Physical layer Protocol Data Unit (PPDU) including a universal signal (U-SIG) field, an extreme high throughput signal (EHT-SIG) field, and a data field; The EHT-SIG field is contiguous 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; The U-SIG field is transmitted over two symbols; The PPDU is transmitted to a single user; The EHT-SIG field is configured as one content channel, The one content channel is configured by duplicating in units of 20 MHz, Information regarding preamble puncturing applied to the PPDU within 80 MHz is represented as [x1 x2 x3 x4], Each of x1, x2, x3, and x4 indicates whether preamble puncturing is applied in the corresponding 20 MHz channel; Each of x1, x2, x3, and x4 is set to 0 or 1; Each of x1, x2, x3, and x4 is set to 0 if the corresponding 20 MHz channel is punctured; the information regarding the preamble puncturing is included in the U-SIG field; and transmitting the PPDU.

Images