Configuration of data units for replication transmissions

Abstract

The invention provides a configuration for replicating a transmitted data unit. The present specification proposes a technical feature for increasing the transmission range of a wireless LAN signal. A wireless LAN signal of the present specification, such as a transport physical protocol data unit (PPDU), may be configured on the basis of a copy transmission mode. A transmission PPDU of the present specification may include data units replicated in a frequency. The data units replicated in the frequency may be configured based on the total bandwidth at which the PPDU is transmitted. The Transport PPDU of this specification proposes various training fields for replicated data units.

Description

[0001] This application is a divisional application of patent application No. 202180055451.3 (PCT / KR2021 / 008180), filed on February 14, 2023, with the title of "Configuration of Data Unit for Replication Transmission", and filed on June 29, 2021. TECHNICAL FIELD

[0002] The present specification relates to a wireless LAN system, and more particularly to a configuration for a replication transmission data unit. BACKGROUND

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

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

[0005] In order to support high throughput and high data rate, the EHT standard can use a wide bandwidth (e.g., 160 / 320 MHz), 16 streams, and / or multi-link (or multi-band) operation, etc.

[0006] In the EHT standard, a wide bandwidth (e.g., 160 / 240 / 320 MHz) can be used for high throughput. In addition, in order to efficiently use the bandwidth, preamble puncturing and multi-RU transmission can be used. SUMMARY

[0007] In a new wireless LAN standard, various technical features are being discussed in order to extend signal transmission. The present specification proposes various technical features that extend the transmission range of a wireless LAN signal.

[0008] Technical features of the present specification relate to technical features performed by a station (STA) of a wireless local area network (LAN). A station (STA) based on the present specification can configure a transmission physical protocol data unit (PPDU) based on a replication transmission mode.

[0009] For example, the transmission PPDU can include a first control signal field for interpreting the transmission PPDU, a short training field (STF), a long training field (LTF), and a data field.

[0010] For example, the first control signal field may include a type field, which includes a type value related to the replication transfer mode.

[0011] For example, the data field may include a first data RU and a second data RU, wherein the first data RU includes a tone that is half of the total bandwidth used to transmit the PPDU, and the second data RU replicates the first data RU in frequency.

[0012] For example, an STF can be configured based on an STF sequence that is predefined / pre-configured for the total bandwidth.

[0013] For example, an LTF can be configured based on an LTF sequence that is predefined / pre-configured for the total bandwidth.

[0014] The technical features of this specification can extend the transmission range of wireless LAN signals (e.g., PPDUs). For example, when transmission power is limited in a specific band (e.g., the 6GHz band), the technical features of this specification can be applied to signals transmitted in that band. In this way, stable signal transmission and reception can be achieved even in bands where transmission power is limited. Attached Figure Description

[0015] Figure 1 Examples of transmitting and / or receiving devices are shown in this specification.

[0016] Figure 2 This is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0017] Figure 3 An example of a PPDU used in IEEE standards is shown.

[0018] Figure 4 The layout of resource units (RUs) used in a 20 MHz band is shown.

[0019] Figure 5 The layout of the RU used in the 40 MHz band is shown.

[0020] Figure 6 The layout of the RU used in the 80 MHz band is shown.

[0021] Figure 7 The structure of the HE-SIG-B field is shown.

[0022] Figure 8 This illustrates an example of assigning multiple user STAs to the same RU using a MU-MIMO scheme.

[0023] Figure 9 This demonstrates operation based on UL-MU.

[0024] Figure 10 An example of a channel used / supported / defined within the 2.4 GHz band is shown.

[0025] Figure 11 An example of a channel used / supported / defined within the 5 GHz band is shown.

[0026] Figure 12 An example of a channel used / supported / defined within the 6 GHz band is shown.

[0027] Figure 13 An example of a PPDU used in this specification is shown.

[0028] Figure 14 Examples of modified transmitting and / or receiving devices are shown in this specification.

[0029] Figure 15 An example of the aggregation of RU26 and RU52 in 20 MHz is shown.

[0030] Figure 16 An example of the aggregation of RU26 and RU52 in 40 MHz is shown.

[0031] Figure 17 An example of the aggregation of RU26 and RU52 in 80 MHz is shown.

[0032] Figure 18 An example of an EHT PPDU is shown.

[0033] Figure 19 An example of the first control signal field or U-SIG field shown in this specification is illustrated.

[0034] Figure 20 This is an example of a symbol that is repeated in the first control signal field.

[0035] Figure 21 This is another example of a symbol that is repeated in the first control signal field.

[0036] Figure 22 An example of repeating the second control signal field is shown.

[0037] Figure 23 This is a schematic diagram illustrating an example of repeating the first control signal field and the second control signal field.

[0038] Figure 24 This shows an example of a repeating data field used for wide bandwidth transmission.

[0039] Figure 25 This is an example of an ER PPDU that includes an STF / LTF field configured based on total bandwidth.

[0040] Figure 26 An example of a PPDU that is copied / repeated only for a specific unit is shown.

[0041] Figure 27 An example of configuring a PPDU based on a specific frequency band / channel is shown.

[0042] Figure 28 This is a flowchart illustrating the operations performed on the transmission STA.

[0043] Figure 29 This is a flowchart illustrating the operations performed in the receiving STA. Detailed Implementation

[0044] In this specification, "A or B" may mean "A only", "B only", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B or C" may mean "A only", "B only", "C only", or "any combination of A, B, and C".

[0045] The forward slash ( / ) or comma used in this specification may indicate "and / or". For example, "A / B" may mean "A and / or B". Therefore, "A / B" may mean "A only", "B only", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0046] In this specification, "at least one of A and B" may mean "A only", "B only" or "both A and B". Additionally, in this specification, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0047] Additionally, in this specification, "at least one of A, B, and C" may 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" may mean "at least one of A, B, and C".

[0048] Additionally, the parentheses used in this specification can indicate "for example". Specifically, when indicated as "control information (EHT-signal)", it can mean that an "EHT-signal" is proposed as an example of "control information". In other words, "control information" in this specification is not limited to "EHT-signal", and an "EHT-signal" can be proposed as an example of "control information". Furthermore, when indicated as "control information (i.e., EHT signal)", it can also mean that an "EHT signal" is proposed as an example of "control information".

[0049] The technical features described individually in one of the accompanying drawings of this specification may be implemented individually or simultaneously.

[0050] The examples in this specification can be applied to various wireless communication systems. For example, the examples in this specification can be applied to wireless local area network (WLAN) systems. For example, this specification can be applied to the IEEE 802.11a / g / n / ac standard or the IEEE 802.11ax standard. Additionally, this specification can be applied to newly proposed EHT standards or the IEEE 802.11be standard. Furthermore, the examples in this specification can be applied to new WLAN standards enhanced from the EHT standard or the IEEE 802.11be standard. Additionally, the examples in this specification can be applied to mobile communication systems. For example, it can be applied to Long Term Evolution (LTE) mobile communication systems based on 3GPP standards and LTE-based evolution mobile communication systems. Furthermore, the examples in this specification can be applied to communication systems based on the 5G NR standard of 3GPP standards.

[0051] In the following text, for the purpose of describing the technical features of this specification, technical features that can be applied to this specification will be described.

[0052] Figure 1 Examples of transmitting and / or receiving devices are shown in this specification.

[0053] exist Figure 1 In the examples, the various technical features described below can be performed. Figure 1 This involves at least one station (STA). For example, STA 110 and 120 in this specification may also be referred to by various terms such as mobile terminal, wireless device, wireless transmit / receive unit (WTRU), user equipment (UE), mobile station (MS), mobile subscriber unit, or simply user. STA 110 and 120 in this specification may also be referred to by various terms such as network, base station, node B, access point (AP), repeater, router, relay, etc. STA 110 and 120 in this specification may also be referred to by various names such as receiving device, transmitting device, receiving STA, transmitting STA, receiving apparatus, transmitting apparatus, etc.

[0054] For example, STA 110 and 120 can be used as APs or non-APs. That is, STA 110 and 120 in this specification can be used as APs and / or non-APs. In this specification, AP can be indicated as AP STA.

[0055] In addition to the IEEE 802.11 standard, STAs 110 and 120 in this specification can support various communication standards together. For example, they can support communication standards based on 3GPP standards (e.g., LTE, LTE-A, 5G NR standards). Furthermore, the STAs in this specification can be implemented in various devices such as mobile phones, vehicles, and personal computers. Additionally, the STAs in this specification can support various communication services such as voice calls, video calls, data communication, and autonomous driving.

[0056] The STA 110 and 120 of this specification may include a media access control (MAC) compliant with the IEEE 802.11 standard and a physical layer interface for radio media.

[0057] The following will refer to Figure 1 Subgraph (a) describes STA 110 and 120.

[0058] The first STA 110 may include a processor 111, a memory 112, and a transceiver 113. The processor, memory, and transceiver shown may be implemented as separate chips, or at least two blocks / functions may be implemented as a single chip.

[0059] The transceiver 113 of the first STA performs signal transmission / reception operations. Specifically, it can transmit / receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be, etc.).

[0060] For example, the first STA 110 can perform the operations intended by the AP. For example, the AP's processor 111 can receive signals via transceiver 113, process receive (RX) signals, generate transmit (TX) signals, and provide control over signal transmission. The AP's memory 112 can store signals received via transceiver 113 (e.g., RX signals) and can store signals to be transmitted via transceiver 113 (e.g., TX signals).

[0061] For example, the second STA 120 can perform operations not expected by the AP STA. For example, the non-AP transceiver 123 performs signal transmission / reception operations. Specifically, it can transmit / receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be packets, etc.).

[0062] For example, a non-AP STA processor 121 can receive signals via transceiver 123, process RX signals, generate TX signals, and provide control over signal transmission. A non-AP STA memory 122 can store signals received via transceiver 123 (e.g., RX signals) and can store signals to be transmitted via transceiver 123 (e.g., TX signals).

[0063] For example, the operation of a device designated as an AP in the description below can be performed in either the first STA 110 or the second STA 120. For instance, if the first STA 110 is an AP, the operation of the device designated as an AP can be controlled by the processor 111 of the first STA 110, and related signals can be transmitted or received via a transceiver 113 controlled by the processor 111 of the first STA 110. Additionally, control information related to the operation of the AP or the AP's TX / RX signals can be stored in the memory 112 of the first STA 110. Similarly, if the second STA 120 is an AP, the operation of the device designated as an AP can be controlled by the processor 121 of the second STA 120, and related signals can be transmitted or received via a transceiver 123 controlled by the processor 121 of the second STA 120. Furthermore, control information related to the operation of the AP or the AP's TX / RX signals can be stored in the memory 122 of the second STA 120.

[0064] For example, in the description below, the operation of a device indicated as a non-AP (or user STA) can be performed in either the first STA 110 or the second STA 120. For instance, if the second STA 120 is a non-AP, the operation of the device indicated as a non-AP can be controlled by the processor 121 of the second STA 120, and related signals can be transmitted or received via a transceiver 123 controlled by the processor 121 of the second STA 120. Additionally, control information related to the operation of a non-AP or non-AP TX / RX signals can be stored in the memory 122 of the second STA 120. Similarly, if the first STA 110 is a non-AP, the operation of the device indicated as a non-AP can be controlled by the processor 111 of the first STA 110, and related signals can be transmitted or received via a transceiver 113 controlled by the processor 111 of the first STA 110. Additionally, control information related to the operation of a non-AP or non-AP TX / RX signals can be stored in the memory 112 of the first STA 110.

[0065] In the following description, the devices referred to as (transmit / receive) STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmit / receive) terminal, (transmit / receive) device, (transmit / receive) equipment, network, etc., may refer to...Figure 1 STAs 110 and 120. For example, devices indicated as (but without specific designation) (transmit / receive) STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmit / receive) terminal, (transmit / receive) device, (transmit / receive) equipment, network, etc., may refer to... Figure 1 STA 110 and 120. For example, in the following example, the operation of various STA transmit / receive signals (e.g., PPDU) can be... Figure 1 This is performed in transceivers 113 and 123. Additionally, in the following examples, various STA operations for generating TX / RX signals or pre-performing data processing and calculations on TX / RX signals can be performed within these transceivers. Figure 1 The operations are executed in processors 111 and 121. Examples of operations for generating TX / RX signals or pre-performing data processing and calculations may include: 1) operations to determine / obtain / configure / calculate / decode / encode bit information of subfields (SIG, STF, LTF, Data) included in the PPDU; 2) operations to determine / configure / obtain time resources or frequency resources (e.g., subcarrier resources) for the subfields (SIG, STF, LTF, Data) included in the PPDU; 3) operations to determine / configure / obtain specific sequences (e.g., pilot sequences, STF / LTF sequences, additional sequences applied to SIG) for the subfields (SIG, STF, LTF, Data) included in the PPDU; 4) power control operations and / or power-saving operations applied to the STA; and 5) operations related to the determination / obtaining / configuration / decoding / encoding of the ACK signal. Additionally, in the following examples, various information (e.g., information related to fields / subfields / control fields / parameters / power, etc.) used by various STAs to determine / obtain / configure / calculate / decode / decode the TX / RX signal may be stored in the STA's memory. Figure 1 In memory 112 and 122.

[0066] Figure 1 The aforementioned device / STA in subgraph (a) can be as follows Figure 1 The subgraph (b) is modified as shown below. In the following text, the modifications will be based on... Figure 1 The sub-diagram (b) is used to describe STA 110 and STA120 in this specification.

[0067] For example, Figure 1 The transceivers 113 and 123 shown in subgraph (b) can perform operations with Figure 1 The transceiver shown in sub-diagram (a) has the same function as the aforementioned transceiver. For example, Figure 1The processing chips 114 and 124 shown in sub-figure (b) may include processors 111 and 121 and memories 112 and 122. Figure 1 The processors 111 and 121 and the memories 112 and 122 shown in sub-figure (b) can perform operations related to Figure 1 The processors 111 and 121 and the memories 112 and 122 shown in sub-figure (a) have the same functions.

[0068] The mobile terminal, wireless device, wireless transmit / receive unit (WTRU), user equipment (UE), mobile station (MS), mobile subscriber unit, user, subscriber STA, network, base station, node B, access point (AP), repeater, router, relay, receiving unit, transmitting unit, receiving STA, transmitting STA, receiving device, transmitting device, receiving equipment and / or transmitting equipment described below may mean Figure 1 The STA 110 and 120 shown in subgraphs (a) / (b) may mean, or Figure 1 The processing chips 114 and 124 are shown in sub-figure (b). That is to say, the technical features of this specification can be found in... Figure 1 It can be performed in STA 110 and 120 as shown in subgraphs (a) / (b), or it can be performed only in... Figure 1 The processing chips 114 and 124 shown in sub-diagram (b) are executed Figure 1 Transceivers 113 and 123 are shown in sub-figures (a) / (b). For example, the technical features of transmitting STA transmission control signals can be understood as being through... Figure 1 The transceiver 113 illustrated in sub-diagrams (a) / (b) transmits data in... Figure 1 The technical features of the control signals generated in processors 111 and 121 are illustrated in sub-figures (a) / (b). Alternatively, the technical features of transmitting STA control signals can be understood as follows: Figure 1 The technical features of generating control signals to be transmitted to transceivers 113 and 123 in processing chips 114 and 124 are shown in sub-figure (b).

[0069] For example, the technical characteristics of receiving STA control signals can be understood as through... Figure 1 The technical features of transceivers 113 and 123 receiving control signals shown in sub-figure (a) are illustrated. Alternatively, the technical features of receiving STA control signals can be understood as being achieved through... Figure 1 The processors 111 and 121 shown in subgraph (a) obtain Figure 2 The technical features of the control signals received in transceivers 113 and 123 shown in sub-figure (a). Alternatively, the technical features of receiving STA control signals can be understood as being through... Figure 2The processing chips 114 and 124 shown in sub-figure (b) obtain Figure 2 Technical features of the control signals received in transceivers 113 and 123 shown in sub-figure (b).

[0070] Reference Figure 2 Subgraph (b), software codes 115 and 125 can be included in memories 112 and 122. Software codes 115 and 126 can include instructions for controlling the operation of processors 111 and 121. Software codes 115 and 125 can be included in various programming languages.

[0071] Figure 2 The processors 111 and 121 or processing chips 114 and 124 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices. The processor may be an application processor (AP). For example, Figure 2 The processors 111 and 121 or processing chips 114 and 124 may include at least one of the following: a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), and a modulator and demodulator (modem). For example, Figure 3 The processors 111 and 121 or the processor chips 114 and 124 may be from the SNAPDRAGON™ processor family manufactured by Qualcomm®, the EXYNOS™ processor family manufactured by Samsung®, the processor family manufactured by Apple®, the HELIO™ processor family manufactured by MediaTek®, the ATOM™ processor family manufactured by Intel®, or processors enhanced from these processors.

[0072] In this specification, uplink can mean a link used for communication from a non-AP STA to an AP STA, and uplink PPDUs / packets / signals, etc., can be transmitted through the uplink. Similarly, in this specification, downlink can mean a link used for communication from an AP STA to a non-AP STA, and downlink PPDUs / packets / signals, etc., can be transmitted through the downlink.

[0073] Figure 3 This is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0074] Figure 3 The upper part shows the structure of the Infrastructure Basic Services Set (BSS) of the Institute of Electrical and Electronics Engineers (IEEE) 802.11.

[0075] Reference Figure 3The upper part of the wireless LAN system may include one or more infrastructure BSS 200 and 205 (hereinafter referred to as BSS). BSS 200 and 205, as a set of APs and STAs (e.g., access point (AP) 225 and station (STA1) 200-1) that have successfully synchronized to communicate with each other, are not concepts indicating a specific area. BSS 205 may include one or more STAs 205-1 and 205-2 that can join an AP 230.

[0076] A BSS may include at least one STA, an AP that provides distributed services, and a distributed system (DS) 210 that connects multiple APs.

[0077] Distributed system 210 can implement an Extended Service Set (ESS) 240 that is expanded by connecting multiple BSSs 200 and 205. ESS 240 can be used as a term to refer to a network configured by connecting one or more APs 225 or 230 via distributed system 210. APs included in an ESS 240 may have the same Service Set Identifier (SSID).

[0078] Portal 220 can be used as a bridge to connect a wireless LAN network (IEEE 802.11) to another network (e.g., 802.X).

[0079] exist Figure 3 The BSS shown at the top enables networking between APs 225 and 230, as well as between APs 225 and 230 and STAs 200-1, 205-1, and 205-2. However, it also allows for networking between STAs to perform communication even without APs 225 and 230. Networks that enable communication between STAs by configuring networks even without APs 225 and 230 are defined as self-organizing networks or Independent Basic Service Sets (IBSS).

[0080] Figure 4 The lower part shows a conceptual diagram illustrating the IBSS.

[0081] Reference Figure 4 The lower part of the IBSS is a BSS that operates in a self-organizing mode. Since the IBSS does not include access points (APs), there is no centralized management entity performing management functions at the center. That is, in the IBSS, STAs 250-1, 250-2, 250-3, 255-4, and 255-5 are managed in a distributed manner. In the IBSS, all STAs 250-1, 250-2, 250-3, 255-4, and 255-5 can be composed of mobile STAs, and access to DS to form a self-contained network is not permitted.

[0082] Figure 4An example of a PPDU used in IEEE standards is shown.

[0083] like Figure 4 As shown, various types of PHY Protocol Data Units (PPDUs) are used in the IEEE a / g / n / ac standards. Specifically, LTF and STF include training signals, SIG-A and SIG-B include control information for receiving STAs, and the data field includes user data corresponding to the PSDU (MAC PDU / aggregated MAC PDU).

[0084] Figure 4 It also includes examples of HE PPDUs according to IEEE 802.11ax. According to Figure 4 The HE PPDU is an exemplary PPDU for multiple users. HE-SIG-B may be included only in PPDUs for multiple users, and HE-SIG-B may be omitted in PPDUs for single users.

[0085] like Figure 5 As shown, an HE-PPDU for multiple users (MUs) may include a conventional short training field (L-STF), a conventional long training field (L-LTF), a conventional 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 (optionally, a MAC payload), and a packet extension (PE) field. Each field can be transmitted within the shown time period (i.e., 4 μs or 8 μs).

[0086] The following describes the Resource Unit (RU) used for the PPDU. An RU may include multiple subcarriers (or tones). An RU can be used to transmit signals to multiple STAs according to OFDMA. Alternatively, an RU can also be defined as transmitting signals to a single STA. An RU can be used for STF, LTF, data fields, etc.

[0087] Figure 4 The layout of resource units (RUs) used in a 20 MHz band is shown.

[0088] like Figure 5 As shown, resource units (RUs) corresponding to different numbers of tones (i.e., subcarriers) can be used to form some fields of an HE-PPDU. For example, resources can be allocated in the RUs shown for the HE-STF, HE-LTF, and data fields.

[0089] like Figure 5As shown at the top, 26 units (i.e., units corresponding to 26 tones) can be configured. Six tones can be used for the guard band in the leftmost band of the 20 MHz band, and five tones can be used for the guard band in the rightmost band of the 20 MHz band. Additionally, seven DC tones can be inserted in the center band (i.e., the DC band), and 26 units corresponding to 13 tones on each of the left and right sides of the DC band can be configured. Units of 26, 52, and 106 can be assigned to other bands. Individual units can be assigned to receiving STAs (i.e., users).

[0090] Figure 6 The RU layout in the diagram can be used not only for multiple users (MU) but also for a single user (SU), in which case a 242 unit can be used and three DC tones can be inserted, such as... Figure 4 As shown at the bottom.

[0091] although Figure 5 Various sizes of RUs have been proposed, namely 26-RU, 52-RU, 106-RU, and 242-RU, but RUs of a specific size can be expanded or increased. Therefore, this embodiment is not limited to individual RUs of a specific size (i.e., the number of corresponding tones).

[0092] Figure 6 The layout of the RU used in the 40 MHz band is shown.

[0093] Similar to using RUs of various sizes Figure 7 ,exist Figure 4 Examples of frequencies that can be used include 26-RU, 52-RU, 106-RU, 242-RU, and 484-RU. Additionally, five DC tones can be inserted into the center frequency, 12 tones can be used for the guard band in the leftmost band of the 40 MHz band, and 11 tones can be used for the guard band in the rightmost band of the 40 MHz band.

[0094] As shown, a 484-RU can be used when the RU layout is for a single user. The specific number of RUs can be similar to... Figure 4 And change.

[0095] Figure 4 The layout of the RU used in the 80 MHz band is shown.

[0096] Similar to using RUs of various sizes Figure 7 and Figure 8 ,exist Figure 8Examples of these frequencies include 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, and 996-RU. Additionally, seven DC tones can be inserted into the center frequency, 12 tones can be used for the leftmost guard band of the 80 MHz band, and 11 tones can be used for the rightmost guard band of the 80 MHz band. Furthermore, a 26-RU corresponding to 13 tones on each of the left and right sides of the DC band can be used.

[0097] As shown, when the RU layout is used for a single user, a 996-RU can be used, in which case five DC tones can be inserted.

[0098] The RUs described in this specification can be used for both uplink (UL) and downlink (DL) communication. For example, when performing UL-MU communication requested by a trigger frame, a transmitting STA (e.g., an AP) can assign a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a first STA via the trigger frame, and can assign a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a second STA. Thereafter, the first STA can transmit a first trigger-based PPDU based on the first RU, and the second STA can transmit a second trigger-based PPDU based on the second RU. The first and second trigger-based PPDUs are transmitted to the AP in the same (or overlapping) time periods.

[0099] For example, when configuring a DL MU PPDU, a transmission STA (e.g., an AP) can assign a first RU (e.g., a 26 / 52 / 106 / 242-RU, etc.) to a first STA and a second RU (e.g., a 26 / 52 / 106 / 242-RU, etc.) to a second STA. That is, the transmission STA (e.g., an AP) can transmit HE-STF, HE-LTF, and data fields for the first STA through the first RU in a MU PPDU, and can transmit HE-STF, HE-LTF, and data fields for the second STA through the second RU.

[0100] Information related to the layout of the RU can be communicated via HE-SIG-B signals.

[0101] Figure 7 The structure of the HE-SIG-B field is shown.

[0102] As shown, the HE-SIG-B field 710 includes a common field 720 and a user-specific field 730. The common field 720 may include information that is commonly applied to all users receiving the SIG-B (i.e., users STA). The user-specific field 730 may be referred to as a user-specific control field. When the SIG-B is transmitted to multiple users, the user-specific field 730 may be applied to only one of the multiple users.

[0103] As shown, public field 720 and user-specific field 730 can be encoded separately.

[0104] Public field 720 may include N 8 bits of RU allocation information. For example, RU allocation information may include information related to the location of the RU. For instance, when... Figure 9 When using a 20 MHz channel, the RU allocation information may include information related to a specific frequency band where a particular RU (26-RU / 52-RU / 106-RU) is deployed.

[0105] The following is an example of a RU allocation information consisting of 8 bits.

[0106] [Table 1]

[0107] like Figure 7 As shown in the example, up to nine 26-RUs can be allocated to a 20 MHz channel. When the RU allocation information in common field 720 as shown in Table 1 is set to "00000000", nine 26-RUs can be allocated to the corresponding channel (i.e., 20 MHz). Alternatively, when the RU allocation information in common field 720 as shown in Table 1 is set to "00000001", seven 26-RUs and one 52-RU are arranged in the corresponding channel. That is, in Figure 7 In the example, 52-RUs can be assigned to the far right, and seven 26-RUs can be assigned to its left.

[0108] The examples in Table 1 only show some RU locations that can display RU allocation information.

[0109] For example, RU allocation information may include examples from Table 2 below.

[0110] [Table 2]

[0111] "01000y2y1y0" refers to an example of allocating 106-RUs to the leftmost side of a 20 MHz channel and five 26-RUs to its right. In this case, multiple STAs (e.g., user STAs) can be allocated to the 106-RUs based on a MU-MIMO scheme. Specifically, up to eight STAs (e.g., user STAs) can be allocated to the 106-RUs, and the number of STAs (e.g., user STAs) allocated to the 106-RUs is determined based on the 3-bit information (y2y1y0). For example, when the 3-bit information (y2y1y0) is set to N, the number of STAs (e.g., user STAs) allocated to the 106-RUs based on the MU-MIMO scheme can be N+1.

[0112] Typically, multiple STAs (e.g., user STAs) that are different from each other can be assigned to multiple RUs. However, multiple STAs (e.g., user STAs) can be assigned to one or more RUs with at least a certain size (e.g., 106 subcarriers) based on a MU-MIMO scheme.

[0113] like Figure 8 As shown, the user-specific field 730 may include multiple user fields. As described above, the number of STAs (e.g., user STAs) allocated to a specific channel can be determined based on the RU allocation information in the common field 720. For example, when the RU allocation information in the common field 720 is "00000000", one user STA can be allocated to each of the nine 26-RUs (e.g., nine user STAs can be allocated). That is, up to nine user STAs can be allocated to a specific channel via an OFDMA scheme. In other words, up to nine user STAs can be allocated to a specific channel via a non-MU-MIMO scheme.

[0114] For example, when the RU allocation is set to "01000y2y1y0", multiple STAs can be assigned to the 106-RU located on the far left using a MU-MIMO scheme, and five user STAs can be assigned to the five 26-RUs located to its right using a non-MU-MIMO scheme. This can be achieved through... Figure 8 Examples are used to illustrate this.

[0115] Figure 8 This illustrates an example of assigning multiple user STAs to the same RU using a MU-MIMO scheme.

[0116] For example, when Figure 8 When the RU allocation shown is set to "01000010", a 106-RU can be assigned to the leftmost side of a specific channel, and five 26-RUs can be assigned to its right. Additionally, three user STAs can be assigned to the 106-RU via a MU-MIMO scheme. As a result, since eight user STAs are assigned, the HE-SIG-B's user-specific field 730 can include eight user fields.

[0117] These eight user fields can be clicked Figure 9 The order shown is used to represent this. Additionally, as... Figure 10 As shown, two user fields can be implemented using a single user block field.

[0118] Figure 10 and Figure 11 The user fields shown can be configured based on two formats. Specifically, user fields related to MU-MIMO schemes can be configured using the first format, while user fields related to non-MIMO schemes can be configured using the second format. (See reference)Figure 11 For example, user fields 1 to 3 may be based on a first format, and user fields 4 to 8 may be based on a second format. The first or second format may include bit information of the same length (e.g., 21 bits).

[0119] Each user field can have the same size (e.g., 21 bits). For example, the user fields in the first format (first MU-MIMO scheme) can be configured as follows.

[0120] For example, the first bit (B0-B10) of the user field (i.e., 21 bits) may include identification information (e.g., STA-ID, partial AID, etc.) of the user STA assigned to the corresponding user field. Additionally, the second bit (B11-B14) of the user field (i.e., 21 bits) may include information related to space configuration. Specifically, examples of the second bit (B11-B14) are shown in Tables 3 and 4 below.

[0121] [Table 3]

[0122] [Table 4]

[0123] As shown in Tables 3 and / or 4, the second bit (e.g., B11-B14) may include information related to the number of spatial streams allocated to multiple user STAs based on the MU-MIMO scheme. For example, when... Figure 12 When allocating three user STAs to a 106-RU using the MU-MIMO scheme shown, N_user is set to "3". Therefore, the values ​​of N_STS, N_STS, and N_STS can be determined as shown in Table 3. For example, when the value of the second bit (B11-B14) is "0011", it can be set to N_STS=4, N_STS=1, and N_STS=1. That is, in Figure 12 In the example, four space streams can be assigned to user field 1, one space stream can be assigned to user field 1, and one space stream can be assigned to user field 3.

[0124] As shown in the examples in Tables 3 and / or 4, the information regarding the number of spatial streams used by a user STA (i.e., the second bit, B11-B14) can consist of 4 bits. Additionally, the information regarding the number of spatial streams used by a user STA (i.e., the second bit, B11-B14) can support up to eight spatial streams. Furthermore, the information regarding the number of spatial streams used by a user STA (i.e., the second bit, B11-B14) can support up to four spatial streams per user STA.

[0125] Additionally, the third bit (B15-B18) in the user field (i.e., 21 bits) may include modulation and coding scheme (MCS) information. MCS information can be applied to the data field in the PPDU, including the corresponding SIG-B.

[0126] The MCS, MCS information, MCS index, MCS field, etc., used in this specification may be indicated by index values. For example, MCS information may be indicated by indices 0 to 11. MCS information may include information related to constellation modulation type (e.g., BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, etc.) and information related to coding rate (e.g., 1 / 2, 2 / 3, 3 / 4, 5 / 6, etc.). Information related to channel coding type (e.g., LCC or LDPC) may not be included in the MCS information.

[0127] Additionally, the fourth bit (i.e., B19) in the user field (i.e., 21 bits) can be a reserved field.

[0128] Additionally, the fifth bit (B20) in the user field (i.e., 21 bits) may include information related to the coding type (e.g., BCC or LDPC). That is, the fifth bit (B20) may include information related to the type (e.g., BCC or LDPC) of the channel coding applied to the data field in the PPDU that includes the corresponding SIG-B.

[0129] The above example pertains to user fields in the first format (the format for MU-MIMO schemes). An example of user fields in the second format (the format for non-MU-MIMO schemes) is shown below.

[0130] The first bit (e.g., B0-B10) of the user field in the second format may include identification information for the user STA. Additionally, the second bit (e.g., B11-B13) of the user field in the second format may include information related to the number of spatial streams applied to the corresponding RU. Furthermore, the third bit (e.g., B14) of the user field in the second format may include information related to whether a beamforming control matrix is ​​applied. The fourth bit (e.g., B15-B18) of the user field in the second format may include modulation and coding scheme (MCS) information. Furthermore, the fifth bit (e.g., B19) of the user field in the second format may include information related to whether dual-carrier modulation (DCM) is applied. Finally, the sixth bit (i.e., B20) of the user field in the second format may include information related to the coding type (e.g., BCC or LDPC).

[0131] Figure 12 Operation based on UL-MU is illustrated. As shown, a transmission STA (e.g., AP) can perform channel access through contention (e.g., backoff operation) and can transmit trigger frame 930. That is, the transmission STA can transmit a PPDU including trigger frame 930. Upon receiving a PPDU including the trigger frame, a trigger-based (TB) PPDU is transmitted after a delay corresponding to SIFS.

[0132] TB PPDUs 941 and 942 can be transmitted in the same time period and can be transmitted from multiple STAs (e.g., user STAs) with the AID indicated in the trigger frame 930. The ACK frame 950 for the TB PPDU can be implemented in various forms.

[0133] Figure 12 An example of a channel used / supported / defined within the 2.4 GHz band is shown.

[0134] The 2.4 GHz band can be referred to by other terms such as the first band. Additionally, the 2.4 GHz band can refer to the frequency domain used / supported / defined by channels with a center frequency close to 2.4 GHz (e.g., channels with a center frequency between 2.4 and 2.5 GHz).

[0135] Multiple 20 MHz channels can be included in the 2.4 GHz band. The 20 MHz channels within the 2.4 GHz band can have multiple channel indices (e.g., indices 1 to 14). For example, the center frequency of the 20 MHz channel assigned to channel index 1 can be 2.412 GHz, the center frequency of the 20 MHz channel assigned to channel index 2 can be 2.417 GHz, and the center frequency of the 20 MHz channel assigned to channel index N can be (2.407 + 0.005 GHz). N) GHz. The channel index can be referred to by various terms such as channel number. The specific values ​​of the channel index and center frequency can be changed.

[0136] Figure 12 This example illustrates four channels within a 2.4 GHz band. Each of the first frequency domain 1010 to the fourth frequency domain 1040 shown herein may include one channel. For example, the first frequency domain 1010 may include channel 1 (a 20 MHz channel with index 1). In this case, the center frequency of channel 1 may be set to 2412 MHz. The second frequency domain 1020 may include channel 6. In this case, the center frequency of channel 6 may be set to 2437 MHz. The third frequency domain 1030 may include channel 11. In this case, the center frequency of channel 11 may be set to 2462 MHz. The fourth frequency domain 1040 may include channel 14. In this case, the center frequency of channel 14 may be set to 2484 MHz.

[0137] Figure 12 An example of a channel used / supported / defined within the 5 GHz band is shown.

[0138] The 5 GHz band may be referred to by other terms such as the second band. A 5 GHz band may mean the frequency domain using / supporting / defining channels with a center frequency greater than or equal to 5 GHz and less than 6 GHz (or less than 5.9 GHz). Alternatively, a 5 GHz band may include multiple channels between 4.5 GHz and 5.5 GHz. Figure 12 The specific values ​​shown can be changed.

[0139] Multiple channels within the 5 GHz band include the unlicensed National Information Infrastructure (UNII)-1, UNII-2, UNII-3, and ISM. UNII-1 may be referred to as UNII Low. UNII-2 may include frequency domains referred to as UNII Mid and UNII-2 Extended. UNII-3 may be referred to as UNII-Upper.

[0140] Multiple channels can be configured within the 5 GHz band, and the bandwidth of each channel can be set differently, such as 20 MHz, 40 MHz, 80 MHz, 160 MHz, etc. For example, the 5170 MHz to 5330 MHz frequency domain / range within UNII-1 and UNII-2 can be divided into eight 20 MHz channels. The 5170 MHz to 5330 MHz frequency domain / range can be divided into four channels using a 40 MHz frequency domain. The 5170 MHz to 5330 MHz frequency domain / range can be divided into two channels using an 80 MHz frequency domain. Alternatively, the 5170 MHz to 5330 MHz frequency domain / range can be divided into one channel using a 160 MHz frequency domain.

[0141] Figure 13 An example of a channel used / supported / defined within the 6 GHz band is shown.

[0142] The 6 GHz band can be referred to by other terms such as the third band. The 6 GHz band can mean the frequency domain that uses / supports / defines a channel with a center frequency greater than or equal to 5.9 GHz. Figure 13 The specific values ​​shown can be changed.

[0143] For example, Figure 13 The 20 MHz channel can be defined starting from 5.940 GHz. Specifically, in Figure 13 In a 20 MHz channel, the leftmost channel can have an index of 1 (or channel index, channel number, etc.), and 5.945 GHz can be assigned as the center frequency. That is, the center frequency of the channel with index N can be determined as (5.940 + 0.005 GHz). N) GHz.

[0144] therefore, Figure 13 The index (or channel number) of the 2 MHz channel can be 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61, 65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 129, 133, 137, 141, 145, 149, 153, 157, 161, 165, 169, 173, 177, 181, 185, 189, 193, 197, 201, 205, 209, 213, 217, 221, 225, 229, 233. Additionally, according to the above (5.940+0.005) N) GHz rules, Figure 13 The indexes for the 40 MHz channels can be 3, 11, 19, 27, 35, 43, 51, 59, 67, 75, 83, 91, 99, 107, 115, 123, 131, 139, 147, 155, 163, 171, 179, 187, 195, 203, 211, 219, 227.

[0145] Despite Figure 13 The examples show 20, 40, 80, and 160 MHz channels, but 240 MHz or 320 MHz channels can be added separately.

[0146] The following describes the PPDUs transmitted / received in the STA of this specification.

[0147] Figure 13 An example of a PPDU used in this specification is shown.

[0148] Figure 13 The PPDU may be referred to by various terms such as EHT PPDU, TX PPDU, RX PPDU, Type 1 or Type N PPDU, etc. For example, in this specification, PPDU or EHT PPDU may be referred to by various terms such as TX PPDU, RX PPDU, Type 1 or Type N PPDU, etc. Furthermore, EHT PPDUs may be used in EHT systems and / or new WLAN systems enhanced from EHT systems.

[0149] Figure 13 The PPDU can indicate all or part of the PPDU types used in the EHT system. For example, Figure 13 The example can be used in both single-user (SU) and multi-user (MU) modes. In other words, Figure 13The PPDU can be used for one or more receiving STAs. When Figure 9 When using trigger-based (TB) mode, the PPDU can be omitted. Figure 14 The EHT-SIG. In other words, the STA that has received the trigger frame for the uplink MU (UL-MU) can transmit. Figure 13 The PPDU for EHT-SIG is omitted in the example.

[0150] exist Figure 7 In this context, L-STF to EHT-LTF can be referred to as a preamble or physical preamble, and can be generated / transmitted / received / acquired / decoded at the physical layer.

[0151] Figure 8 The subcarrier spacing of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields can be determined to be 312.5 kHz, and the subcarrier spacing of the EHT-STF, EHT-LTF, and data fields can be determined to be 78.125 kHz. That is, the tone index (or subcarrier index) of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields can be represented in units of 312.5 kHz, and the tone index (or subcarrier index) of the EHT-STF, EHT-LTF, and data fields can be represented in units of 78.125 kHz.

[0152] exist Figure 7 In the PPDU, L-LTF and L-STF can be the same as those in the traditional fields.

[0153] For example, Figure 7 The L-SIG field can include 24 bits of bit information. For example, the 24 bits can include a 4-bit rate field, a 1-bit reserved bit, a 12-bit length field, a 1-bit parity bit, and a 6-bit tail bit. For example, the 12-bit length field can include information related to the length or duration of the PPDU. For example, the 12-bit length field can be determined based on the type of PPDU. For example, when the PPDU is a non-HT, HT, VHT, or EHT PPDU, the value of the length field can be determined to be a multiple of 3. For example, when the PPDU is 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. In other words, for non-HT, HT, VHT, or EHT PPDUs, the value of the length field can be determined to be a multiple of 3, and for HE PPDUs, the value of the length field can be determined to be a multiple of 3 + 1 or a multiple of 3 + 2.

[0154] For example, the transmitting STA can apply BCC coding based on a 1 / 2 coding rate to the 24 bits of information in the L-SIG field. The transmitting STA then obtains 48 bits of BCC coded bits. BPSK modulation can be applied to these 48 coded bits to generate 48 BPSK symbols. The transmitting STA can map these 48 BPSK symbols to positions other than the pilot subcarriers {subcarrier indices -21, -7, +7, +21} and the DC subcarrier {subcarrier index 0}. As a result, the 48 BPSK symbols can be mapped to subcarrier indices -26 to -22, -20 to -8, -6 to -1, +1 to +6, +8 to +20, and +22 to +26. The transmitting STA can further map the signal {-1, -1, -1, 1} to subcarrier indices {-28, -27, +27, +28}. These signals can be used for channel estimation in the frequency domain corresponding to {-28, -27, +27, +28}.

[0155] The transmitting STA can generate an RL-SIG in the same manner as the L-SIG. BPSK modulation can be applied to the RL-SIG. The receiving STA can determine whether the RX PPDU is an HE PPDU or an EHT PPDU based on the presence of the RL-SIG.

[0156] Universal SIG (U-SIG) can be inserted in Figure 8 Following RL-SIG. U-SIG can be referred to by various terms such as First SIG Field, First SIG, First Type SIG, Control Signal, Control Signal Field, First (Type) Control Signal, etc.

[0157] The U-SIG may include N bits of information and may include information for identifying the type of EHT PPDU. For example, the U-SIG may be configured based on two symbols (e.g., two adjacent OFDM symbols). Each symbol of the U-SIG (e.g., an OFDM symbol) may have a duration of 4 μs. Each symbol of the U-SIG may be used to transmit 26 bits of information. For example, each symbol of the U-SIG may be transmitted / received based on 52 data tones and 4 pilot tones.

[0158] For example, A bits of information (e.g., 52 uncoded bits) can be transmitted via U-SIG (or the U-SIG field). The first symbol of U-SIG can transmit the first X bits of the A bits (e.g., 26 uncoded bits), and the second symbol of U-SIG can transmit the remaining Y bits of the A bits (e.g., 26 uncoded bits). For example, the transport STA can obtain the 26 uncoded bits included in each U-SIG symbol. The transport STA can perform convolutional coding (i.e., BCC coding) at a rate of R=1 / 2 to generate 52 coded bits, and can perform interleaving on the 52 coded bits. The transport STA can perform BPSK modulation on the interleaved 52 coded bits to generate 52 BPSK symbols to be assigned to each U-SIG symbol. A U-SIG symbol can be transmitted based on 65 tones (subcarriers) from subcarrier index -28 to subcarrier index +28, except for DC index 0. The 52 BPSK symbols generated by the transmission STA can be transmitted based on the remaining tones (subcarriers) other than the pilot tones (i.e., tones -21, -7, +7, +21).

[0159] For example, the A-bit information generated by U-SIG (e.g., 52 uncoded bits) may include a CRC field (e.g., a field with a length of 4 bits) and a tail field (e.g., a field with a length of 6 bits). The CRC field and tail field can be transmitted via the second symbol of U-SIG. The CRC field can be generated based on the 26 bits allocated to the first symbol of U-SIG and the remaining 16 bits in the second symbol excluding the CRC / tail field, and can be generated based on a conventional CRC calculation algorithm. Additionally, the tail field can be used to terminate the convolutional decoder's lattice and can be set to, for example, "000000".

[0160] The A-bit information (e.g., 52 uncoded bits) transmitted by U-SIG (or the U-SIG field) can be divided into version-independent bits and version-dependent bits. For example, version-independent bits can have a fixed size or a variable size. For example, version-independent bits can be assigned only to the first symbol of U-SIG, or version-independent bits can be assigned to both the first and second symbols of U-SIG. For example, version-independent bits and version-dependent bits can be referred to by various terms such as first control bit, second control bit, etc.

[0161] For example, the version-independent bits of the U-SIG may include a 3-bit PHY version identifier. For example, the 3-bit PHY version identifier may include information related to the PHY version of the TX / RX PPDU. For example, the first value of the 3-bit PHY version identifier may indicate that the TX / RX PPDU is an EHT PPDU. In other words, when the transmitting STA transmits an EHT PPDU, the 3-bit PHY version identifier can be set to the first value. In other words, based on the first value of the PHY version identifier, the receiving STA can determine that the RX PPDU is an EHT PPDU.

[0162] For example, the version-independent bits of U-SIG may include a 1-bit UL / DL flag field. The first value of the 1-bit UL / DL flag field relates to UL communication, and the second value of the UL / DL flag field relates to DL communication.

[0163] For example, the version-independent bits of U-SIG may include information related to the TXOP length and information related to the BSS color ID.

[0164] For example, when EHT PPDUs are categorized into various types (e.g., EHT PPDUs related to SU mode, EHT PPDUs related to MU mode, EHT PPDUs related to TB mode, EHT PPDUs related to extended range transmission, etc.), information related to the type of EHT PPDU can be included in the version-related bits of the U-SIG.

[0165] For example, U-SIG may include: 1) a bandwidth field including information related to bandwidth; 2) a field including information related to the MCS scheme applied to EHT-SIG; 3) an indication field including information about whether a dual subcarrier modulation (DCM) scheme is applied to EHT-SIG; 4) a field including information related to the number of symbols used for EHT-SIG; 5) a field including information about whether EHT-SIG is generated across the full band; 6) a field including information related to the type of EHT-LTF / STF; and 7) information related to fields indicating the length of EHT-LTF and the length of CP.

[0166] Can be Figure 7 A pre-lead perforation is applied to the PPDU. A pre-lead perforation means applying a perforation to a portion of the full band (e.g., the secondary 20 MHz band). For example, when transmitting an 80 MHz PPDU, the STA can apply a perforation to the secondary 20 MHz band within the 80 MHz band, and can transmit the PPDU only through the primary 20 MHz band and the secondary 40 MHz band.

[0167] For example, the pattern of the preamble perforation can be pre-configured. For example, when applying the first perforation pattern, perforation can be applied only to the secondary 20 MHz band within the 80 MHz band. For example, when applying the second perforation pattern, perforation can be applied only to either of the two secondary 20 MHz bands included in the secondary 40 MHz band within the 80 MHz band. For example, when applying the third perforation pattern, perforation can be applied only to the secondary 20 MHz bands included in the primary 80 MHz band within the 160 MHz band (or 80+80 MHz band). For example, when applying the fourth perforation, if a primary 40 MHz band included in the 80 MHz band within the 160 MHz band (or 80+80 MHz band) exists, perforation can be applied to at least one 20 MHz channel that does not belong to the primary 40 MHz band.

[0168] Information relating to the prelead via applied to the PPDU may be included in the U-SIG and / or EHT-SIG. For example, the first field of the U-SIG may include information relating to adjacent bandwidth, and the second field of the U-SIG may include information relating to the prelead via applied to the PPDU.

[0169] For example, U-SIG and EHT-SIG can include information related to the prelead via, based on the following method. When the bandwidth of the PPDU exceeds 80 MHz, U-SIG can be configured individually in 80 MHz units. For example, when the bandwidth of the PPDU is 160 MHz, the PPDU can 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 can include information related to the 160 MHz bandwidth, and the second field of the first U-SIG can include information related to the prelead via applied to the first 80 MHz band (i.e., information related to the prelead via pattern). Additionally, the first field of the second U-SIG can include information related to the 160 MHz bandwidth, and the second field of the second U-SIG can include information related to the prelead via applied to the second 80 MHz band (i.e., information related to the prelead via pattern). Furthermore, the EHT-SIG adjacent to the first U-SIG may include information related to the prelead via applied to the second 80 MHz band (i.e., information related to the prelead via pattern), and the EHT-SIG adjacent to the second U-SIG may include information related to the prelead via applied to the first 80 MHz band (i.e., information related to the prelead via pattern).

[0170] Alternatively or additionally, U-SIG and EHT-SIG may include information relating to the leader piercing, based on the following method: U-SIG may include information relating to the leader piercing for all bands (i.e., information relating to the leader piercing pattern). That is, EHT-SIG may not include information relating to the leader piercing, and only U-SIG may include information relating to the leader piercing (i.e., information relating to the leader piercing pattern).

[0171] U-SIGs can be configured in 20 MHz units. For example, when configuring an 80 MHz PPDU, U-SIGs can be duplicated. That is, four identical U-SIGs can be included in an 80 MHz PPDU. PPDUs with bandwidths exceeding 80 MHz can include different U-SIGs.

[0172] Figure 7 The EHT-SIG may include control information for receiving STAs. The EHT-SIG can be transmitted via at least one symbol, and a symbol may have a length of 4 µs. Information regarding the number of symbols used for the EHT-SIG may be included in the U-SIG.

[0173] EHT-SIG may include references Figure 5 and Figure 13 The technical features of HE-SIG-B are described. For example, such as... Figure 13 As in the example, EHT-SIG can include public fields and user-specific fields. Public fields in EHT-SIG can be omitted, and the number of user-specific fields can be determined based on the number of users.

[0174] like Figure 13 As in the example, the public fields and user-specific fields of EHT-SIG can be encoded separately. A user block field included in the user-specific fields can include information for two users, but the last user block field included in the user-specific fields can include information for one user. That is, a user block field of EHT-SIG can include at most two user fields. Figure 4 In the example, each user field may be related to MU-MIMO allocation or non-MU-MIMO allocation.

[0175] like Figure 5 As in the example, the common fields of EHT-SIG can include CRC bits and tail bits. The length of the CRC bits can be determined to be 4 bits. The length of the tail bits can be determined to be 6 bits and can be set to "000000".

[0176] like Figure 4As in the example, the common fields of EHT-SIG can include RU allocation information. RU allocation information can imply information related to the location of RUs allocated to multiple users (i.e., multiple receiving STAs). As shown in Table 1, RU allocation information can be configured in 8-bit (or N-bit) units.

[0177] Tables 5 through 7 provide examples of 8-bit (or N-bit) information for various RU allocations. The indexes shown in the individual tables can be modified, some entries in Tables 5 through 7 can be omitted, and entries (not shown) can be added.

[0178] [Table 5]

[0179] [Table 6]

[0180] [Table 7]

[0181] The examples in Tables 5 through 7 relate to information regarding the location of RUs allocated to the 20 MHz band. For example, “Index 0” in Table 5 could be in the case of individually allocating nine 26-RUs (e.g., in individually allocating...). Figure 4 (As shown in the case of nine 26-RUs)

[0182] In addition, multiple RUs can be assigned to a single STA in an EHT system. For example, regarding “index 60” in Table 6, a 26-RU can be assigned to the leftmost side of the 20 MHz band for a single user (i.e., the receiving STA), a 26-RU and a 52-RU can be assigned to its right side, and five 26-RUs can be assigned individually to its right side.

[0183] A mode that omits the common field of EHT-SIG is supported. This mode, where the common field of EHT-SIG is omitted, can be referred to as compressed mode. When using compressed mode, multiple users (i.e., multiple receiving STAs) can decode PPDUs (e.g., the data field of the PPDU) based on non-OFDMA. That is, multiple users of EHT PPDUs can decode PPDUs (e.g., the data field of the PPDU) received via the same frequency band. Furthermore, when using uncompressed mode, multiple users of EHT PPDUs can decode PPDUs (e.g., the data field of the PPDU) based on OFDMA. That is, multiple users of EHT PPDUs can receive PPDUs (e.g., the data field of the PPDU) via different frequency bands.

[0184] EHT-SIG can be configured based on various MCS schemes. As mentioned above, information related to the MCS scheme applied to EHT-SIG can be included in U-SIG. EHT-SIG can also be configured based on DCM schemes. For example, among the N data tones (e.g., 52 data tones) allocated to EHT-SIG, a first modulation scheme can be applied to half of the continuous tones, and a second modulation scheme can be applied to the remaining half of the continuous tones. That is, the transmitting STA can use the first modulation scheme to modulate specific control information with a first symbol and allocate it to half of the continuous tones, and can use the second modulation scheme to modulate the same control information with a second symbol and allocate it to the remaining half of the continuous tones. As mentioned above, information regarding whether a DCM scheme is applied to EHT-SIG (e.g., a 1-bit field) can be included in U-SIG.

[0185] Figure 5 HE-STF can be used to improve automatic gain control estimation in multiple-input multiple-output (MIMO) or OFDMA environments. Figure 5 HE-LTF can be used to estimate channels in MIMO or OFDMA environments.

[0186] Figure 5 PPDUs (e.g., EHT-PPDUs) can be based on Figure 6 and Figure 6 Use the example to configure.

[0187] For example, it can be based on Figure 5 The RU is used to configure the EHT PPDU for transmission over the 20 MHz band (i.e., the 20 MHz EHT PPDU). That is, it can be configured as follows: Figure 5 The location of the EHT-STF, EHT-LTF, and RU of the data field included in the EHT PPDU is shown.

[0188] Based on Figure 5 The RU is used to configure the EHT PPDU for transmission over the 40 MHz band (i.e., 40 MHz EHT PPDU). That is, it can be configured as follows: Figure 13 The location of the EHT-STF, EHT-LTF, and RU of the data field included in the EHT PPDU is shown.

[0189] because Figure 13 The RU position corresponds to 40 MHz, so it can be used. Figure 13 The pattern is determined when it is repeated twice, which is used to determine the tone scheme for 80MHz. That is, it can be based on not being Figure 13 RU instead Figure 13 The RU is re-programmed twice with a new tone scheme to transmit 80MHz EHT PPDU.

[0190] when Figure 13 When the pattern is repeated twice, 23 tones can be configured in the DC region (i.e., 11 guard tones + 12 guard tones). That is, the tone scheme 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 the 996-RU and can include 5 DC tones, 12 left guard tones, and 11 right guard tones.

[0191] Tone schemes for 160 / 240 / 320 MHz can be followed Figure 13 The pattern is configured by repeating it multiple times.

[0192] Figure 13 The PPDU can be identified (or recognized) as an EHT PPDU based on the following methods.

[0193] The receiving STA can determine the type of an RX PPDU as an EHT PPDU based on the following: for example, 1) when the first symbol after the L-LTF signal of the RX PPDU is a BPSK symbol; 2) when the L-SIG of the RX PPDU is detected to be a repeated RL-SIG; and 3) when the result of applying "modulo 3" to the value of the length field of the L-SIG of the RX PPDU is detected as "0". When an RX PPDU is determined to be an EHT PPDU, the receiving STA can further determine its type based on the following: Figure 14 The type of EHT PPDU (e.g., SU / MU / triggered / extended range type) is detected by the bits included in the symbol following the RL-SIG. In other words, based on: 1) the first symbol following the L-LTF signal as a BPSK symbol; 2) the RL-SIG adjacent to and identical to the L-SIG field; 3) the L-SIG including a length field whose result of applying "modulo 3" is set to "0"; and 4) the 3-bit PHY version identifier of the aforementioned U-SIG (e.g., a PHY version identifier with a first value), the receiving STA can determine that the RXPPDU is an EHT PPDU.

[0194] For example, the receiving STA can determine the type of RX PPDU as EHT PPDU based on the following: 1) when the first symbol after the L-LTF signal is a BPSK symbol; 2) when L-SIG is detected as a repeated RL-SIG; and 3) when the result of applying "mod 3" to the value of the length field of L-SIG is detected as "1" or "2", the RX PPDU can be determined as HEPPDU.

[0195] For example, the receiving STA can determine the type of an RX PPDU as a non-HT, HT, or VHT PPDU based on the following: 1) when the first symbol following the L-LTF signal is a BPSK symbol; and 2) when no repeated L-SIG is detected in the RL-SIG, the RX PPDU can be determined as a non-HT, HT, or VHT PPDU. Additionally, even if the receiving STA detects repeated RL-SIG, the RX PPDU can be determined as a non-HT, HT, or VHT PPDU if the result of applying modulo 3 to the length value of the L-SIG is detected as "0".

[0196] In the following examples, signals represented as (TX / RX / UL / DL) signals, (TX / RX / UL / DL) frames, (TX / RX / UL / DL) packets, (TX / RX / UL / DL) data units, (TX / RX / UL / DL) data, etc., can be based on... Figure 1 The PPDU transmits / receives signals. Figure 14 PPDUs can be used to transmit / receive various types of frames. For example, Figure 14 PPDUs can be used in control frames. Examples of control frames may include Request Transport (RTS), Clear Transport (CTS), Power Saving Poll (PS-poll), BlockACKReq, BlockAck, Null Data Packet (NDP) announcement, and trigger frames. For example, Figure 1 PPDUs can be used for management frames. Examples of management frames may include beacon frames, (re)association request frames, (re)association response frames, probe request frames, and probe response frames. For example, Figure 14 PPDUs can be used in data frames. For example, Figure 14 A PPDU can be used to transmit at least two or more of the following: control frames, management frames, and data frames simultaneously.

[0197] Figure 1 Examples of modified transmitting and / or receiving devices are shown in this specification.

[0198] Figure 14 Each device / STA in subgraphs (a) / (b) can be as follows Figure 1 The modifications shown are as follows. Figure 14 The transceiver 630 can be used with Figure 1 The transceivers 113 and 123 are the same. Figure 14 The transceiver 630 may include a receiver and a transmitter.

[0199] Figure 14 The processor 610 can be with Figure 21 The processors 111 and 121 are the same. Alternatively, Figure 15The processor 610 can be with Figure 15 The processing chips 114 and 124 are the same.

[0200] Figure 15 The memory 620 can be with Figure 16 The memories 112 and 122 are the same. Alternatively, Figure 16 The memory 620 can be with Figure 17 The memories 112 and 122 are different separate external memories.

[0201] Reference Figure 17 The power management module 611 manages the power used by the processor 610 and / or transceiver 630. The battery 612 supplies power to the power management module 611. The display 613 outputs the results processed by the processor 610. The keypad 614 receives inputs to be used by the processor 610. The keypad 614 can be displayed on the display 613. The SIM card 615 can be an integrated circuit for securely storing the International Mobile Subscriber Identity (IMSI) and its associated keys, used for identifying and authenticating users on mobile phone devices (e.g., mobile phones and computers).

[0202] Reference Figure 17 The speaker 640 can output a result related to the tone processed by the processor 610. The microphone 641 can receive input related to the tone to be used by the processor 610.

[0203] The technical features applicable to the EHT standard will be described below.

[0204] According to an embodiment, the EHT standard can support PPDUs with a bandwidth of 320MHz. Furthermore, 240MHz and 160+80MHz transmissions can be supported. The 240MHz and 160+80MHz bandwidths can be configured by applying an 80MHz preamble piercing within the 320MHz band. For example, the 240MHz and 160+80MHz bandwidths can be configured based on three 80MHz channels, including a primary 80MHz channel.

[0205] According to an embodiment, in the EHT standard, the 11ax standard tone scheme can be used for 20 / 40 / 80 / 160MHz PPDUs. According to an embodiment, the 11ax standard 160MHz OFDMA tone scheme can be copied and used for 320MHz PPDUs.

[0206] According to an embodiment, the 240MHz and 160+80MHz transmissions can consist of three 80MHz segments. According to an embodiment, the 160MHz tone scheme can be copied and used for a non-OFDMA tone scheme of the 320MHz PPDU.

[0207] According to an embodiment, in each 160MHz segment of the non-OFDMA tone scheme for a 320MHz PPDU, 12 null tones and 11 null tones can be configured on the far left and far right, respectively.

[0208] According to the embodiment, in each 160 MHz segment of the non-OFDMA tone plan of the 320 / 160+160 MHz PPDU, 12 and 11 empty tones can be configured on the far left and far right, respectively.

[0209] According to embodiments of this specification, the data portion of the EHT PPDU may use the same subcarrier spacing as the data portion of the IEEE 802.11ax standard.

[0210] The technical features of the Resource Unit (RU) applicable to the EHT standard will be described below.

[0211] According to embodiments of this specification, in the EHT standard, one or more RUs can be assigned to a single STA. For example, the encoding and interleaving schemes of multiple RUs assigned to a single STA can be set differently.

[0212] According to embodiments of this specification, a small-size RU can be polymerized with other small-size RUs. According to embodiments of this specification, a large-size RU can be polymerized with other large-size RUs.

[0213] For example, an RU with 242 or more tones can be defined / set as a "large RU". Similarly, an RU with fewer than 242 tones can be defined / configured as a "small RU".

[0214] According to embodiments of this specification, for each link, one PSDU may exist per STA. According to embodiments of this specification, for LDPC encoding, one encoder may be used for each PSDU.

[0215] Small size RU

[0216] According to embodiments of this specification, the aggregation of small-sized RUs can be configured not to cross the 20 MHz channel boundary. For example, RU106+RU26 and RU52+RU26 can be configured as aggregations of small-sized RUs.

[0217] According to embodiments of this specification, in 20 MHz and 40 MHz PPDUs, adjacent RU26 and RU106 can be aggregated / combined within the 20 MHz boundary.

[0218] According to embodiments of this specification, RU26 and RU52 can be polymerized / combined in 20 MHz and 40 MHz PPDUs.

[0219] For example, in 20 MHz (or 20 MHz PPDU), an example of adjacent RU26 and RU52 can be obtained via... Figure 18 As shown.

[0220] Figure 18 An example of the aggregation of RU26 and RU52 in 20 MHz is shown.

[0221] Reference Figure 18 RU26 and RU52, which are shaded, can be polymerized. For example, the second RU26 and the second RU52 can be polymerized. Similarly, the seventh RU and the third RU52 can be polymerized.

[0222] For example, at 40 MHz, Figure 13 An example of adjacent RU26 and RU52 is described in the document.

[0223] Figure 12 An example of the aggregation of RU26 and RU52 in 40 MHz is shown.

[0224] Reference Figure 3 Shaded RU26 and RU52 can be aggregated. For example, the second RU26 and the second RU52 can be aggregated. Also, the eighth RU26 and the third RU52 can be aggregated. Also, the eleventh RU26 and the sixth RU52 can be aggregated. Also, the seventeenth RU26 and the seventh RU52 can be aggregated.

[0225] According to embodiments of this specification, RU26 and RU52 can be polymerized / combined in an 80 MHz PPDU.

[0226] For example, an example of adjacent RU26 and RU52 in 80 MHz can be derived from... Figure 7 As shown.

[0227] Figure 8 An example of the aggregation of RU26 and RU52 in 80 MHz is shown.

[0228] Reference Figure 13 The 80 MHz band can be divided into a first 40 MHz band and a second 40 MHz band. For example, within the first 40 MHz band, RU26 and RU52 can be aggregated. Similarly, within the first 40 MHz band, RU26 and RU52 can be aggregated. Again, within the second 40 MHz band, RU26 and RU52 can be aggregated.

[0229] According to an embodiment, when LDPC encoding is applied, a single tone mapper can be used for a RU with fewer than 242 tones.

[0230] Large size RU

[0231] According to an embodiment, in 320MHz OFDMA transmission for a single STA, aggregation of large-size RUs can be permitted only within the primary 160MHz or the secondary 160MHz. For example, the primary 160MHz (channel) can consist of a primary 80MHz (channel) and a secondary 80MHz (channel). The secondary 160MHz (channel) can be configured using channels other than the primary 160MHz.

[0232] According to an embodiment, in a 240 MHz OFDMA transmission of a single STA, aggregation of large-size RUs is allowed only within 160 MHz (band / channel), and 160 MHz can be composed of two adjacent 80 MHz channels.

[0233] According to the embodiment, in the OFDMA transmission of a single STA at 160+80 MHz, the aggregation of large-size RUs is allowed only within a continuous 160 MHz (band / channel) or the remaining 80 MHz (band / channel).

[0234] In 160 MHz OFDMA, aggregation of large-size RUs configured as shown in Table 8 is supported.

[0235] [Table 8]

[0236] In 80 MHz OFDMA, aggregation of large-size RUs configured as shown in Table 9 is supported.

[0237] [Table 9]

[0238] In 80 MHz non-OFDMA, aggregation of large-size RUs configured as shown in Table 10 is supported. In 80 MHz non-OFDMA, perforation can be applied. For example, one of four 242 RUs can be perforated.

[0239] [Table 10]

[0240] In 160 MHz non-OFDMA, aggregation of large-size RUs configured as shown in Table 11 is supported. In 160 MHz non-OFDMA, perforation can be applied. For example, one of eight 242 RUs can be perforated. Alternatively, one of four 484 RUs can be perforated.

[0241] [Table 11]

[0242] In 240 MHz non-OFDMA, aggregation of large-size RUs as configured as shown in Table 12 is supported. In 240 MHz non-OFDMA, perforation can be applied. For example, one of six 484 RUs can be perforated. As another example, one of three 996 RUs can be perforated.

[0243] [Table 12]

[0244] In 320 MHz non-OFDMA, aggregation of large-size RUs with configurations as shown in Table 13 is supported. In 320 MHz non-OFDMA, perforation can be applied. For example, one of eight 484 RUs can be perforated. As another example, one of four 996 RUs can be perforated.

[0245] [Table 13]

[0246] The technical features related to the operating mode will be described below.

[0247] According to an embodiment, a station (STA) supporting the EHT standard (hereinafter, "EHT STA") or a station (STA) supporting the EHT standard (hereinafter, "HE STA") can operate in a 20 MHz channel width mode. In the 20 MHz channel width mode, an EHT STA can operate by reducing the operating channel width to 20 MHz using an Operation Mode Indication (OMI).

[0248] According to an embodiment, the EHT STA (or HE STA) can operate in an 80 MHz channel width mode. For example, in the 80 MHz channel width mode, the EHT STA can operate by reducing the operating channel width to 80 MHz using an Operation Mode Indication (OMI).

[0249] According to an embodiment, an EHT STA can support Sub-channel Selective Transmission (SST). An SST-enabled STA can quickly select (and switch to) another channel between transmissions to cope with fading in narrow sub-channels.

[0250] The 802.11be standard (i.e., the EHT standard) offers higher data rates than the 802.11ax standard. The EHT (i.e., Ultra High Throughput) standard supports wide bandwidth (up to 320 MHz), 16 streams, and multi-band operation.

[0251] The EHT standard supports various preamble piercing or multi-RU allocations across wide bandwidths (up to 320 MHz) and SU / MU transmissions. Additionally, the EHT standard considers signal transmission / reception methods allocated via the 80 MHz band to support STAs with low-end capabilities (e.g., STAs operating only at 80 MHz). Therefore, the following specification proposes methods for configuring / transmitting EHT-SIGs for MU transmissions, considering Sub-Channel Selective Transmission (SST) and multi-RU aggregation as defined in the 11ax standard. For example, an EHT-SIG can be configured as a self-contained EHT-SIG. When using a self-contained EHT-SIG, technical features for signaling RU allocations can be proposed in this specification.

[0252] EHT PPDU Configuration

[0253] To support EHT-based transmission methods, a new frame format can be used. When transmitting signals over the 2.4 / 5 / 6 GHz band using the new frame format, both conventional Wi-Fi receivers (or STAs) (e.g., 802.11n) and EHT-compliant receivers (those conforming to 802.11n / ac / ax standards) can receive EHT signals transmitted over the 2.4 / 5 / 6 GHz band.

[0254] The preamble of an EHT-based PPDU can be configured in various ways. The following describes an embodiment of configuring the preamble of an EHT-based PPDU. Hereinafter, an EHT-based PPDU may be described as an EHT PPDU. However, an EHT PPDU is not limited to the EHT standard. An EHT PPDU may include not only the 802.11be standard (i.e., the EHT standard), but also PPDUs based on new standards improved / evolved / extended from the 802.11be standard.

[0255] Figure 18 An example of an EHT PPDU is shown.

[0256] Reference Figure 19 The EHT PPDU 1800 may include an L section 1810 and an EHT section 1820. The EHT PPDU 1800 can be configured in a format that supports backward compatibility. Furthermore, the EHT PPDU 1800 can be transmitted to a single STA and / or multiple STAs. The EHT PPDU 1800 may be an example of a MU-PPDU of the EHT standard.

[0257] The EHT PPDU 1800 may include an L section 1810 prior to the EHT section 1820 for coexistence with or backward compatibility with conventional STAs (e.g., STAs compliant with the 802.11n / ac / ax standard). For example, the L section 1810 may include L-STF, L-LTF, and L-SIG. For example, phase rotation may be applied to the L section 1810.

[0258] According to an embodiment, EHT section 1820 may include RL-SIG, U-SIG 1821, EHT-SIG 1822, EHT-STF, EHT-LTF, and a data field. Similar to the 11ax standard, RL-SIG may be included in EHT section 1820 for L-SIG reliability and range extension. RL-SIG may be transmitted immediately after L-SIG and may be configured to repeat L-SIG.

[0259] For example, four additional subcarriers can be applied to L-SIG and RL-SIG. Additional subcarriers can be configured at subcarrier indices [-28, -27, 27, 28]. These additional subcarriers can be modulated using the BPSK scheme. Furthermore, the coefficient [-1 -1 -1 1] can be mapped to these additional subcarriers.

[0260] For example, an EHT-LTF can be one of 1x EHT-LTF, 2x EHT-LTF, or 4x EHT-LTF. The EHT standard supports EHT-LTF for 16 spatial streams.

[0261] Figure 18 The various fields in can be compared with Figure 18 The corresponding fields described in the text are the same.

[0262] The technical features that can be further improved in this specification will be described below.

[0263] In a wireless LAN system, a new 6GHz band can be established. The 6GHz band may include reference... Figure 18 The 20 / 40 / 80 / 160 / 320MHz channels in the aforementioned frequency domain. For example, when transmitting and receiving signals in an indoor environment via the 6GHz band, low-power transmission may be necessary. That is, the transmission power of wireless LAN signals may be limited for existing transceivers used in the 6GHz band. As a result, when transmitting / receiving PPDUs (e.g., EHT PPDUs) via the 6GHz band, problems may arise due to shortened transmission range caused by low-power transmission. Therefore, this specification proposes a transmission / reception technique for range extension. On the other hand, while the examples in this specification are preferably applied to PPDU transmission / reception in the 6GHz band, they can also be used in other bands where short transmission range problems may occur.

[0264] This specification outlines various technical features for range extension. These features are preferably applied to transmit / receive PPDUs. In other words, examples in this specification illustrate various transmit / receive PPDUs for range extension. Examples of transmit / receive PPDUs may include... Figure 18 , Figure 19 , Figure 19 , Figure 19 , Figure 19 and Figure 19 The various fields mentioned above.

[0265] More specifically, examples of transmit / receive PPDUs may include at least one conventional field (e.g., Figure 20 The L-STF, L-LTF, L-SIG, and RL-SIG fields are also mentioned. Furthermore, examples of transmit / receive PPDUs include a first control signal field (e.g., the U-SIG field) and a second control signal field (e.g., the EHT-SIG field) for transmitting / receiving the PPDU. For example, the first control signal field could be... Figure 21 The U-SIG 1821, and the second control signal field can be Figure 20 EHT-SIG1822. Additionally, examples of transmit / receive PPDUs may include STF (e.g., EHT-STF), LTF (e.g., EHT-LTF), and data fields.

[0266] Various technical features for range extension can be applied to the first control signal field (e.g., U-SIG field), the second control signal field (e.g., EHT-SIG field), STF (e.g., EHT-STF), LTF (e.g., EHT-LTF), and / or the data field.

[0267] The first control signal field (e.g., the U-SIG field) and the second control signal field (e.g., the EHT-SIG field) will be described in detail below.

[0268] Control information not included in the first control signal field (e.g., the U-SIG field) can be referred to by various names, such as overflowed information or overflow information. The second control signal field (e.g., the EHT-SIG field) can include common fields and user-specific fields. Each of the common and user-specific fields can include at least one coded block (e.g., a binary convolutional code (BCC) coded block). A coded block can be transmitted / received via at least one symbol, and a coded block is not necessarily transmitted via a single symbol. Furthermore, a symbol used to transmit a coded block can have a symbol length of 4 μs.

[0269] The transmit / receive PPDUs described in this specification can be used for communication by at least one user. For example, the technical features of this specification can be applied to MU-PPDUs (e.g., EHT MU PDUs) according to the 11be standard. For instance, considering backward compatibility, an example of a MU-PPDU for transmitting signals to multiple STAs could be... Figure 21 PPDU.

[0270] Figure 20 An example of the first control signal field or U-SIG field shown in this specification is illustrated.

[0271] As shown in the figure, the first control signal field (e.g., the U-SIG field) may include a version-independent field 1910 and a version-dependent field 1920. For example, the version-independent field 1910 may include control information that is continuously included regardless of the WLAN version (e.g., IEEE 802.11be and its next-generation standard). For example, the version-dependent field 1920 may include control information that depends on the corresponding version (e.g., the IEEE 802.11be standard).

[0272] For example, version-independent field 1910 may include a 3-bit version identifier indicating the Wi-Fi version 11be and later, a 1-bit DL / UL field BSS color, and / or information related to TXOP duration. For example, version-related field 1920 may include information related to PPDU format type and / or bandwidth, as well as MCS.

[0273] For example, in Figure 21 In the first control signal field shown (e.g., the U-SIG field), two symbols (e.g., two consecutive 4μs long symbols) can be jointly encoded. Furthermore, it can be configured based on 52 data tones and 4 pilot tones for each 20MHz band / channel. Figure 22 The fields. Furthermore, it can be modulated in the same way as the traditional 11ax standard HE-SIG-A. Figure 22 The field. In other words, modulation can be based on BPSK 1 / 2 bit rate. Figure 23 The field.

[0274] For example, the second control signal field (e.g., the EHT-SIG field) can be divided into a common field and a user-specific field, and can be encoded based on various MCS levels. For example, the common field may include indication information related to the spatial stream used in the transmitted / received PPDU (e.g., the data field) and indication information related to the RU. For example, the user-specific field may include ID information, MCS, and encoding-related indication messages used by at least one specific user (or receiving STA). In other words, the user-specific field may include decoding information (e.g., STA ID information, MCS information, and / or channel coding type / rate information assigned to the RU) of the data field transmitted by at least one RU indicated by the RU allocation subfield included in the common field.

[0275] Table 14 below shows examples of information fields / bits that may be included in the first control signal field (e.g., the U-SIG field). As described below, because there is a limitation on the length of the first control signal field (e.g., the U-SIG field), some fields in Table 14 may overflow into other fields. That is, the bit lengths described in the table below can be changed, and at least one of the individual fields / bits listed in the table below can be omitted. In addition, other fields / bits can be added.

[0276] [Table 14]

[0277] The first control signal field (e.g., the U-SIG field) may consist of two consecutive symbols. In this case, the maximum number of bits that can be included in the first control signal field (e.g., the U-SIG field) may be fixed or preset (e.g., fixed to 48 / 52 bits or preset). Therefore, there may be information not included in the first control signal field (e.g., the U-SIG field), and this information may be referred to by various names, such as overflow information, overflow information, U-SIG overflow, and U-SIG overflow information / field. According to the examples in this specification, overflow information is preferably included in the second control signal field (e.g., the EHT-SIG field). Furthermore, because overflow information may not be user-specific information, the corresponding information is preferably included in a common field of the second control signal field (e.g., the EHT-SIG field).

[0278] The following describes examples of various technical features used for range extension.

[0279] Feature 1: An example of a PPDU for range extension is presented below. EHT PPDUs applying range extension-related technical features can be represented by various names, such as "11be ER PPDU," "EHT ER PPDU," "ER PPDU," "ER Transmission Signal," and "ER Transmission." Furthermore, because some fields / RUs of the PPDU can be copied using techniques for range extension, PPDUs for range extension can be configured based on a copied transmission mode. That is, "ER PPDU" can be indicated as a PPDU configured based on a copied transmission mode.

[0280] In this specification, "ER PPDU" can refer to PPDUs of various formats used for ER transmission. "ER PPDU" in this specification can include signal fields supporting normal SU / MU modes (e.g., the U-SIG field for EHT MU PPDUs) or signal fields designed specifically for ER modes. Furthermore, the technical features given below can also be applied to other wireless LAN standards and the IEEE 802.11be standard.

[0281] Feature 1.a. As described above, the first control signal field (e.g., the U-SIG field) may include a field (or subfield) related to the PPDU type. In this case, the field related to the PPDU type can be configured as follows.

[0282] Feature 1.ai: ​​The PPDU type field can consist of 2 bits of information. In this case, a single entry of 2 bits can indicate an extended range PPDU.

[0283] Feature 1.ai1. For example, within 2 bits of information, the first value (e.g., 00) indicates a SU PPDU, the second value (e.g., 01) indicates a MU-PPDU, the third value (e.g., 10) can indicate a TB PPDU, and the fourth value (e.g., 11) can indicate an ERPPDU. Alternatively, only some of the above values ​​may be used.

[0284] Feature 1.ai1.a. For example, SU-PPDU and MU-PPDU can also be indicated by the same entry (i.e., the first value) within 2 bits of information.

[0285] Feature 1.ai1.b. For example, an ER PPDU can be composed of a SU / MU PPDU.

[0286] Feature 1.a.ii. As another example, 3 bits of information can be used in a first control signal field (e.g., a U-SIG field). For example, the 3 bits of information can consist of two consecutive subfields. For example, the 3 bits of information can be configured by a first subfield consisting of 2 bits for a PPDU type and a second subfield consisting of 1 bit. The second subfield may include information about HARQ operations applied to the transmission / reception of the PPDU (e.g., redundancy version, new data indicator, information about the HARQ processor number) and / or information about multi-AP communication techniques applied to the transmission / reception of the PPDU. For example, the 3 bits of information can consist of a subfield, and at least one entry in that subfield may include information about the PPDU type, and at least one other entry may include information about HARQ operations (e.g., information about redundancy version, new data indicator, and HARQ processor number) and / or information about multi-AP communication techniques applied to the transmission and reception of the PPDU.

[0287] Feature 1.b. When the value of a PPDU type subfield has a value pre-configured for the ER PPDU, a power boost can be applied to L-STF, L-LTF, L-SIG, RL-SIG, STF, and / or LTF for range extension. For example, a power boost can be applied from L-STF to RL-SIG, or from L-STF to a first control signal field (e.g., U-SIG field) or to a second control signal field (e.g., up to EHT-SIG field), or from L-STF to STF (e.g., EHT-STF) or to LTF (e.g., EHT-LTF). The power boost can be applied in 1 / 2 / 3 dB increments.

[0288] Feature 1.c. To increase the robustness of the first control signal field (e.g., the U-SIG field) that includes public information, the first control signal field (e.g., the U-SIG field) may be repeated in the time domain. For example, the first control signal field (e.g., the U-SIG field) consisting of two consecutive symbols may be repeated and consist of a total of four symbols.

[0289] Feature 1.ci The following describes an example of repeating symbols used for the first control signal field (e.g., the U-SIG field).

[0290] Feature 1.ci1. For example, the first control signal field (e.g., the U-SIG field) can be repeated in units of 2 symbols. Figure 23 This is an example of a symbol that is repeated for the first control signal field. As shown in the figure, the same two symbols that are consecutive to the two symbols used for the first control signal field (e.g., U-SIG-1 and U-SIG-2) can be located.

[0291] Feature 1.ci2. For example, the first control signal field (e.g., the U-SIG field) can be repeated in units of one symbol. Figure 23 This is another example of repeating symbols used in the first control signal field. As shown in the figure, the first symbol of the two symbols used in the first control signal field (e.g., U-SIG-1) can be repeated, and then the remaining symbols (e.g., U-SIG-2) can be repeated.

[0292] Feature 1.c.ii. When repeating the first control signal field (e.g., the U-SIG field), additional technical features may be applied to the repeating first control signal field.

[0293] Feature 1.c.ii.1. For example, interleaving, dual polarization, or multiplication by a specific sequence may not be applied to the symbols of the first control signal field used for repetition.

[0294] Feature 1.c.ii.2. For example, in Figure 23 or Figure 4 In the example, interleaving can be applied to U-SIG-1 symbols and U-SIG-2 symbols, but not to RU-SIG-1 symbols and RU-SIG-2 symbols.

[0295] Feature 1.c.iii. Similar to the example above, the following will describe an example of repeating the second control signal field (e.g., the EHT-SIG field) in the time domain.

[0296] Feature 1.c.iii.1. For example, the second control signal field (e.g., the EHT-SIG field) can consist of one or two OFDM symbols. In this case, based on Figure 15 For example, the second control signal field can be repeated in units of two symbols, or based on... Figure 24 The example allows the second control signal field to be repeated in units of one symbol.

[0297] Feature 1.c.iii.2. Figure 24 An example of repeating the second control signal field is shown. For example... Figure 24 As shown, when the second control signal field (e.g., the EHT-SIG field) consists of two OFDM symbols, it can be repeated in the time domain.

[0298] Feature 1.d. In another example, the value of the PPDU type field configured in the first control signal field (e.g., the U-SIG field) has a pre-configured value for the ER PPDU, and an MCS level lower than the conventional MCS0 level (e.g., an MCS level applying DCM and BPSK technologies) can be applied to the first control signal field (e.g., the U-SIG field). In this case, the first control signal field (e.g., the U-SIG field) can consist of 4 symbols.

[0299] Feature 1.di In the example above, since the ER PPDU is indicated by the PPDU type field, additional indication for robust modulation or DCM may not be required.

[0300] Feature 1.e. Similar to the first control signal field, range extension techniques (e.g., repeating symbols in the time domain or applying DCM modulation techniques) can be applied to the symbols used for the second control signal field (e.g., the EHT-SIG field).

[0301] Feature 1.ei In this case, whether DCM technology is applied to the second control signal field (e.g., EHT-SIG field) can be indicated by the first control signal field (e.g., U-SIG field). That is, the subfields of the first control signal field (e.g., U-SIG field) can include information about whether DCM technology is applied to the second control signal field.

[0302] Feature 1.f. The ER PPDU can be modified as follows.

[0303] Feature 1.fi can repeat the symbol used for the first control signal field (e.g., the U-SIG field) in the time domain, as described in Feature 1.C above.

[0304] Feature 1.f.ii. For example, the first control signal field can be repeated in units of 2 symbols or in units of 1 symbol, as described in Feature 1.C above.

[0305] Feature 1.f.iii. For example, the second control signal field (e.g., the EHT field) may not be repeated in the time domain, but may be repeated / copied in the frequency domain. For example, the second control signal field (e.g., the EHT field) may be copied in frequency based on a 20MHz unit.

[0306] Feature 1.f.iv. Figure 25 This is a schematic diagram illustrating an example of repeating the first control signal field and the second control signal field. Figure 25The example involves an 80MHz PPDU. As shown in the figure, the first control signal field can be repeated / copied in the time domain, and the second control signal field can be repeated / copied in the frequency domain.

[0307] Feature 1.f.iv.1. As in Figure 25 In the example, the first control signal field (i.e., the U-SIG field) can be repeated / copied in the time domain. For example, the ER PPDU may include two symbols for the original first control signal field and two additional symbols for repeating / copying the signal field. Meanwhile, as in Figure 26 In the example, instead of repeating / copying the second control signal field (i.e., the EHT-SIG field) in the time domain, the second control signal field (i.e., the EHT-SIG field) can be repeated / copyed in the frequency band in 20MHz segments.

[0308] Feature 1.f.iv.2. The receiving STA can confirm that the received PPDU is an ER PPDU (or an ER PPDU for SU communication) based on the repetition of the first control signal field.

[0309] Feature 1.g. The following technical features may be applied to the RU included in the ER PPDU of this specification.

[0310] Feature 1.gi, for example, is capable of aggregation in various ways. Figure 27 The 26-tone RU, 52-tone RU, 106-tone RU, and 242-tone RU (or RU26, RU52, RU106, RU242, etc.) shown are illustrated. For example, this can be based on... Figure 26 Examples show how to aggregate multiple RUs in various ways. The RU PPDU in this specification can support various RU aggregations.

[0311] Feature 1.g.ii. For example, the RU size available in the ER PPDU of this specification may be as follows.

[0312] Feature 1.g.ii.1. According to the first example, any size RU can be used for the ER PPDU in this specification. For example, RU26, RU52, RU26+RU52 (that is, an RU that combines a 26-tone RU and a 52-tone RU), RU106, RU106+RU26 and RU242 can all be used.

[0313] Feature 1.g.ii.1.a. For example, any of the available RU sizes (e.g., the six sizes mentioned above) can be applied to a specific ER PPDU. That is, the data fields of a specific ER PPDU can be composed of RUs of any size.

[0314] Feature 1.g.ii.2. According to the second example, only RUs with a size of 106-pitch or more can be used for ERPPDU.

[0315] Feature 1.g.ii.2.a. For example, for a particular ER PPDU, one of three RU sizes can be selected (e.g., RU106, RU106+RU26, RU242).

[0316] Feature 1.g.ii.2.b. According to another example, only RU106 and RU242 without RU aggregation can be used in the ER PPDU of this specification.

[0317] Feature 1.g.ii.3. When transmitting an ER PPDU, information about the size of the available RU for data transmission of the ER PPDU includes the first / second control signal fields (i.e., U-SIG and / or EHT-SIG).

[0318] Feature 1.g.ii.3.a. For example, information about the size of the available RUs for data transmission in the ER PPDU can be included in the ER allocation field, and the ER allocation field can be included in the first / second control signal field. The ER allocation field can consist of 1 bit or 2 bits and can be referred to by various names. Below is an example of an ER allocation field. For example, when the ER allocation field has a first value (i.e., 00), only 106-tone RUs can be used for the data signals / fields of the ER PPDU.

[0319] [Table 15]

[0320] Feature 1.g.iii. As described above, when using a RU of a specific size to transmit data signals / fields of an ER PPDU, the following technical features may be additionally applied.

[0321] Feature 1.g.iii.1. For example, a fixed RU with the power boosting technology described below can be used.

[0322] Feature 1.g.iii.1.a. For example, when transmitting an ER PPDU, the positions of available RUs can be pre-configured based on the size of the RUs used within the 20MHz band (e.g., the RU size indicated by the ER allocation field). For example, when using RU106, the leftmost RU106 can be used. For example, when using RU106+RU26, RU106 located at the leftmost position and RU26 located fifth from the leftmost position can be used. The pre-configured positions of the RUs (i.e., RU106 or RU106+RU26) can be changed.

[0323] Feature 1.g.iii.1.b. In the above example, since the location of the RU is fixed (or pre-configured), additional instructions or signaling for the location of the RU can be omitted.

[0324] Feature 1.g.iii.1.c. For signals transmitted using a fixed RU location, a power boost can be applied by considering a corresponding RU size within the 20MHz band.

[0325] Feature 1.g.iii.2. For example, the repetition technique within 20MHz described below can be used.

[0326] Feature 1.g.iii.2.a. For example, when the RU size for the ER PPDU is determined as follows (e.g., the RU size indicated by the ER allocation field), the corresponding RU can be repeated within a specific band (e.g., a 20MHz band). For example, when a 106-tone RU is used for the ER PPDU (i.e., when a 106-tone RU is indicated by the ER allocation field), two 106-tone RUs can be allocated within 20MHz. Therefore, a 106-tone RU can be replicated / repeated in frequencies within a 20MHz band.

[0327] Feature 1.g.iii.2.b. Based on the above example, since the same data is repeated / copied in RUs of the same size, the advantage is that diversity and repetition gain are generated.

[0328] Feature 1.g.iv. Additional or alternative ground, when configuring ER PPDU, is able to repeat data signals in 20MHz units.

[0329] Feature 1.g.iv.1. Because wide-bandwidth transmission can be considered within a specific band (e.g., the 6 GHz band), ERPPDUs can also be transmitted over a wide bandwidth. For example, when transmitting an ER PPDU over a wide bandwidth, data (e.g., user data or payload) can be allocated to a 242-tone RU. In this case, the 242-tone RU can be repeated / copied within the BW.

[0330] Feature 1.g.iv.2. The following describes an example using an 80MHz ER PPDU.

[0331] Feature 1.g.iv2.a. Figure 27 This illustrates an example of using a repeating data field for wide-bandwidth transmission. As shown, the 242-tone RU is repeated / copied, thus allowing a total of four identical 242-tone RUs to be transmitted.

[0332] Feature 1.g.iv.2.b. In the examples above, DCM can be applied to the data fields. For example, Figure 28The 242-tone RU can be a RU that applies DCM.

[0333] Feature 1.g.iv.2.c. In the examples above, STF and LTF (i.e., EHT-STF and EHT-LTF) can be configured using sequences corresponding to the full bandwidth. For example, as Figure 28 As shown, when applying repetition / copy to the data field of an 80MHz PPDU, it is preferable to use the EHT-STF sequence and EHT-LTF sequence pre-configured / predefined for 80MHz.

[0334] Feature 1.g.iv.2.d. According to another example, STF and LTF sequences can be set based on 20MHz. That is, EHT-STF and EHT-LTF sequences with pre-configuration / pre-defined parameters can be used for 20MHz.

[0335] Feature 1.g.iv.2.e. If the data field is copied / repeated, the PAPR may increase. To reduce PAPR, phase rotation can be applied to the 20MHz frequency segment. That is, phase rotation can be applied to the data field. For example, each element of the phase rotation sequence used for phase rotation can be selected as one of {1, -1, j, -j}.

[0336] Feature 1.g.iv.2.ei For example, a phase rotation sequence of [1 -1 -1 -1] can be applied to the data field of an 80MHz ERPPDU.

[0337] Feature 1.g.iv.2.e.ii. For example, for the data field of a 160MHz ER PPDU, a phase rotation sequence of [1 -1 -1-1 1 -1 -1 -1] can be applied.

[0338] Features 1.g.iv.2.e.iii. can be applied to the STF / LTF of the ER PPDU. Specifically, when the STF / LTF of the ER PPDU is copied in the same manner as the data field, the phase rotation used for the data field can also be applied to the STF / LTF.

[0339] Feature 1.gv allows modification of the RU size, the number of duplicate / copy RUs, and the PPDU bandwidth used in the examples above. For example, it enables the duplication / copying of data fields in units of 20 / 40 / 80 / 160MHz. That is, for the data field of an ER PPDU, RUs with various tones (e.g., 242 / 484 / 996 / 2x996) can be copied / repeated.

[0340] Feature 1.gv1. For example, if the total bandwidth of the ER PPDU is N, the size of one RU included in the data field of the ER PPDU is set based on N / 2, and preferably the corresponding RU is copied / repeated in frequency. The bandwidth can be set differently to 80 / 160 / 320MHz, etc., and the size of one RU can also be set differently to 484 / 996 / 2x996-tone RU, etc.

[0341] Feature 1.gv1.a. For example, when configuring a 40MHz ER PPDU, a single RU for the data field can be set based on a 20MHz bandwidth. That is, it is preferable to include a 242-tone RU corresponding to the 20MHz bandwidth in the data field and to copy / repeat it in the frequency. For example, when configuring an 80MHz ER PPDU, a single RU for the data field can be set based on a 40MHz bandwidth. That is, it is preferable to include a 484-tone RU corresponding to the 40MHz bandwidth in the data field and to copy / repeat it in the frequency.

[0342] Feature 1.gv1.b. When a RU is copied / repeated as described above, the receive performance can be improved by 3dB. In this way, the transmission / reception range can be extended.

[0343] Feature 1.gv1.c. As described above, when repeating / copying RUs included in the data field, the STF / LTF (e.g., EHT-STF / EHT-LTF) is preferably set based on the total bandwidth of the ERPPDU. For example, when configuring an 80MHz ER PPDU, a 484-tone RU is used for the data field instead of a 996-tone RU, but it is preferred to use an 80MHz bandwidth sequence for the STF / LTF instead of a 40MHz bandwidth. In other words, for the total bandwidth of the PPDU (e.g., 80MHz), the STF / LTF is preferably configured based on a predefined / pre-configured STF / LTR sequence (e.g., an 80MHz EHT-STF / LTF sequence).

[0344] Furthermore, when configuring a 160MHz ER PPDU, the 996-tone RU will be used instead of 2. The 996-tone RU is used for the data field, but a 160MHz bandwidth sequence instead of an 80MHz bandwidth sequence is preferably used for the STF / LTF. In other words, the STF / LTF is preferably configured based on a predefined / pre-configured STF / LTF sequence (e.g., a 160MHz EHT-STF / LTF sequence) for the total bandwidth of the PPDU (e.g., 160MHz).

[0345] In addition, when configuring a 320MHz ER PPDU, the data field uses 2 996 - pitch RU instead of 4 996-tone RU, but the STF / LTF preferably uses a sequence with a bandwidth of 320MHz rather than 160MHz. In other words, the STF / LTF is preferably configured based on a predefined / pre-configured STF / LTF sequence (e.g., a 320MHz EHT-STF / LTF sequence) for the total bandwidth of the PPDU (e.g., 320MHz).

[0346] Figure 24 This is an example of an ER PPDU that includes an STF / LTF field configured based on the total bandwidth. As shown in the figure, the total bandwidth of the ER PPDU is 80MHz, and therefore, the 484-tone RU is included in the data field, and the 484-tone RU is replicated in the frequency. That is, the RU corresponding to half of the total bandwidth (i.e., 40MHz) is allocated to the data field. However, the STF / LTF is configured based on a preset STF / LTF sequence for the total bandwidth, which is the 80MHz EHT-STF / LTF sequence.

[0347] Feature 1.gv1.d. Additionally or alternatively, when repeating / copying RUs included in the data field, STF / LTF (e.g., EHT-STF / EHT-LTF) can also be repeated / copied in the same manner as RUs. For example, when configuring an 80MHz ER PPDU, the STF and LTF can be set based on a predefined / pre-configured sequence for a 40MHz bandwidth. The corresponding STF / LTF can be copied across frequencies.

[0348] When replicating STF / LTF in the same manner as RU, the following problems may arise. For example, if the total bandwidth of the ER PPDU is 80MHz and the STF / LTF is based on a 20 / 40MHz sequence, additional indications / signaling may be needed regarding whether the STF / LTF was generated and repeated based on some bandwidth rather than the total bandwidth. Furthermore, there is a possibility that the tone allocation (or RU location) related to the total bandwidth and the tone allocation (or RU allocation) related to certain bandwidths are not perfectly aligned. For example, because the 80 / 160 / 320MHz tone allocation defined in a wireless LAN system does not perfectly match the 20MHz tone allocation, the channel estimation performance for certain tones may degrade when using a 20MHz STF / LTF sequence when transmitting 80 / 160 / 320MHz ER PPDUs. Therefore, as... Figure 24 As shown, it is preferable to generate STF / LTF based on the total bandwidth.

[0349] Feature 1.gv1.di To reduce PAPR issues caused by RU replication, phase rotation is preferably applied. For example, phase rotation can be applied to data fields, STF, and / or LTF. Phase rotation operations can be applied on a per-BW / RU replication basis.

[0350] Feature 1.gv1.d.ii. For example, when an 80MHz (or 160MHz) ER PPDU is replicated in units of 40MHz (or 80MHz), phase rotation can be performed in units of 40MHz (or 80MHz). In this case, the phase rotation sequence can be [1 j], [1 -1], [-1 1], [1 -j], etc.

[0351] Feature 1.gv1.e. For example, the transmission format (or replication format) of the ER PPDU can be indicated by a subfield of the U-SIG field. For example, it can be indicated by the BW field and / or the PPDU type field in the U-SIG field. For example, when transmitting an 80MHz ER PPDU, the BW field can have a predefined / preconfigured value for 80MHz, and the PPDU type field can have a preset value for the extended range format (or replication format) (e.g., 11). The receiving STA can know that the received PPDU is an 80MHz signal by the BW field of the received PPDU, and knows that the received PPDU is an ER PPDU (i.e., an ER PPDU that replicates the 484-tone RU corresponding to 40MHz in frequency) by the type field.

[0352] Feature 1.gv2. The size and bandwidth of specific RUs mentioned above can be modified. In other words, various repetition granularities (or replication granularities) can be considered for ER PPDUs.

[0353] Feature 1.gv2.a. For example, for repetition granularity, 20 / 40 / 80 / 160MHz subchannels or 242 / 484 / 996 / 2x996 tones can be considered.

[0354] Feature 1.gv2.b. When supporting various repetition granularities, additional information indicating the granularity may be required. For example, information about the repetition granularity can be indicated by the following 2 bits. The following 2 bits can be included in a first control signal field (e.g., the U-SIG field) or a second control signal field (e.g., the EHT-SIG field).

[0355] [Table 16]

[0356] For example, when the 2-bit information has a first value (e.g., 00), it is possible to repeat / copy the RU of the ER PPDU in units of 20 MHz (or in units of 242 tones). For example, when such... Figure 25 In the example, when repeated / copied in units of 20MHz (or 242-tones), that is, when the repetition granularity is 40MHz (or 484-tones), the second bit information has a second value (e.g., 01).

[0357] Feature 1.gv2.c. The 2-bit information can be configured by reusing existing fields in the first / second control signal fields or by defining new entries in existing fields. For example, the following methods can be considered.

[0358] Feature 1.gv2.ci For robust transmission of the ER PPDU, it is preferable to apply an MCS scheme based on a low MCS level to the ER PPDU. For example, only BPSK and QPSK modulation can be applied to the data field of the ER PPDU, and therefore, only low MCS levels (e.g., conventional MCS0, MCS1, and MCS2 levels) can be considered. For example, when the MCS field comprises 4 bits (b0, b1, b2, b3), the MSB 2 bits (i.e., b0, b1) include information about the replication / repetition granularity, and the LSB 2 bits (i.e., b2, b3) can include information about the MCS. That is, because a limited number of modulation schemes, such as low MCS levels, are used, the MCS information can be indicated only by the 2 bits of the LSB. The length of the MCS field can be changed and can be included in the first / second control signal field.

[0359] Feature 1.gv2.c.ii. For example, only MCS0 can be fixedly used for the data fields of the ER PPDU. In this case, the MCS field can be used to indicate the replication / repetition granularity. Furthermore, only a subset of the MCS field values ​​can include information related to the replication / repetition granularity. For example, the PPDU type field includes predefined / preconfigured values ​​indicating the ER PPDU, and some entries (e.g., 0: 20MHz, 1: 40MHz, 2: 80MHz, 3: 160MHz, 4-15: reserved) can include information related to the replication / repetition granularity.

[0360] Feature 1.gv2.c.iii. For example, the spatial stream (SS) transmitted by the ER PPDU can be fixed to 1 and used. Information about the number of SS (i.e., the number of NSTS or spatial-temporal streams) can be included in the first / second control signal field. Therefore, a subfield associated with conventional NSTS can be used to indicate the replication / repetition granularity. Thus, the NSTS subfield included in the first / second control signal field indicates the replication / repetition granularity when transmitting the ER PPDU, and when transmitting PPDUs of types other than ERPPDUs, it includes information related to the number of SS.

[0361] Feature 1.gv2.c.iii.1. For example, when transmitting an ER PPDU, the subfield containing NSTS information is set to copy / repeat granularity (0: 20MHz, 1: 40MHz, 2: 80MHz, 3: 160MHz, 4-15: reserved).

[0362] Feature 1.gv3. In order to reduce the signaling overhead associated with the replication unit (i.e., the replication RU) and / or ER PPDU as described above, the replication BW / RU for the ER PPDU can be fixed to 1.

[0363] Feature 1.gv3.a. For example, to ensure the minimum data rate, the size of the replication unit can be 20 / 40 / 80MHz.

[0364] Feature 1.gv3.b. For example, when transmitting an ER PPDU over a wide bandwidth, the replication unit included in the corresponding PPDU can be repeated / replicated in frequency. For example, if an RU corresponding to 40MHz (i.e., a 484-tone RU) is included in a PPDU with a total bandwidth of 80 / 160 / 320MHz, the corresponding RU can be repeated / replicated 2 / 4 / 8 times in units of 40MHz.

[0365] Feature 1.gv3.c. In the above case, the STF and LTF included in the PPDU are not determined by the size of a RU, but can be set based on a predefined / preconfigured STF / LTF sequence for the total bandwidth of the PPDU.

[0366] Feature 1.gv3.d. Unlike the above, it is also possible to repeatedly transmit STF and LTF in units of replication. For example, in the case of replication in units of 40MHz, STF and LTF consist of 40MHz sequences and are repeatedly transmitted within the BW.

[0367] Feature 1.gv4. For example, in the IEEE 802.11be system, an 80MHz transmission can be the main unit. Therefore, the ER PPDU can be applied only to the 80MHz BW. In this case, the data fields in the corresponding ER PPDU are copied / repeated in the frequency in units of 20 / 40MHz, and as a result, the same data fields can be included 4 / 2 times.

[0368] Feature 1.gv4.a. Even if a PPDU with a bandwidth of 80MHz is used as described above, the EHT-STF included in the PPDU is configured based on an 80MHz STF sequence, and preferably based on an 80MHz LTF sequence.

[0369] Feature 1.gv4.b. Alternatively, the STF / LTF can be repeated in the same manner as the data field to obtain a combined gain for the STF and LTF. That is, to configure the STF / LTF, the STF / LTF signal can be generated based on a 20 / 40MHz sequence and replicated 4 / 2 times in the frequency.

[0370] Feature 1.gv4.c. For example, PAPR may increase when a specific cell (e.g., data RU, STF, LTF) is repeated / copied in frequency. To address this issue, a specific phase rotation sequence can be applied to the repeated / copied cells when the specific cell is repeated / copied in units of 20 / 40 MHz. For example, [1 -1 -1 -1] can be applied to the repeated / copied cells in units of 20 MHz, and [1 j] can be applied to the repeated / copied cells in units of 40 MHz.

[0371] Feature 1.gv4.d. In the example above, when a specific unit is copied / repeated in 20MHz increments, signal transmission based on copying / repeating may only be possible for the main 40MHz band / channel used for power boost.

[0372] Feature 1.gv4.e. Figure 1 An example of a PPDU that is copied / repeated only for a specific unit is shown. As shown, a specific unit (i.e., data RU, STF, LTF) can be copied / repeated in 20MHz increments within a frequency band. In this case, as shown, the corresponding unit is transmitted only for the main 40MHz band / channel, and a power boost can be applied to the transmitted unit. The power boost for the unit can be performed by N dB (e.g., 1 / 2 / 3dB).

[0373] Feature 1.gv5 allows modification of the above example in various ways. For example, the PPDU can be configured based solely on the primary 20MHz band / channel instead of the primary 40MHz band / channel.

[0374] Feature 1.gv5.a. Figure 14 An example of configuring a PPDU based on a specific frequency band / channel is shown. As shown, the STF / LTF / data fields can be configured only for a specific frequency band / channel (i.e., the main 20MHz band / channel), and power boosts can be applied to the STF / LTF data fields (e.g., a power boost based on N dB).

[0375] Feature 1.gv5.b. As described above, according to this specification, DCM technology can be applied to the data fields of PPDU. Therefore, Figure 28 / Figure 1 The 242-tone RU can be an RU that uses DCM technology.

[0376] The above-mentioned technical features can be combined with the following technical features.

[0377] Feature 2. The ER PPDU in this specification can be applied only to the primary 80MHz area / channel. For example, the ER PPDU is transmitted only in the 80MHz area / channel, and the PPDU includes duplicated / repeated RUs, but some fields (e.g., STF / LTF / data fields) may not be omitted. In other words, preamble piercing may not be supported for the ER PPDU in this specification. In other words, full-bandwidth transmission can be considered for the ER PPDU in this specification.

[0378] Feature 2.a. Additionally or alternatively, some fields in the ER PPDU (e.g., STF / LTF / data fields) can be repeated / copied in 80MHz increments. For example, some fields of a 160MHz ER PPDU (e.g., STF / LTF / data fields) can be copied in 80MHz increments to include a total of 2 data fields, while some fields of a 320MHz ER PPDU (e.g., STF / LTF / data fields) can be copied in 80MHz increments to include a total of 4 data fields.

[0379] Feature 3. A low MCS level (e.g., MCS0) and a spatial flow can be applied to the ER PPDU (e.g., data field) of this specification.

[0380] Feature 3.4. As described above, the repeatability granularity (or replication granularity) can be determined in various ways, and when using a 20MHz granularity, a 242-RU tone can be used in the data field. When using a 40 / 80 / 160MHz granularity, a 484 / 996 / 2x996-tone RU can be used in the data field.

[0381] Feature 3.5. For the extended range transmission described above, i.e., the transmission of ER PPDUs, the BSS can be configured as an extended range BSS. For the ER BSS configuration, EHT beacons or 11be beacons conforming to the EHT standard can be repeated / copied in the frequency as described above. The format of the repeated / copied PPDUs can be configured using the EHT frame format (i.e., the 11be frame format).

[0382] According to the examples in this specification, the STA can perform the following operations.

[0383] Figure 14 This is a flowchart illustrating the operations performed on the transmission STA. (Execution) Figure 1 The operating STA can be an AP STA or a non-AP STA.

[0384] The transport STA can configure the PPDU (S2810) described above for ER transmission. The PPDU for ER transmission can be the ER PPDU described above. As mentioned above, the ER PPDU can be referred to by various names, and can also be referred to as the PPDU associated with the replication transmission mode or EHT replication transmission.

[0385] According to the examples in this specification, the transmission STA constructs a transmission PPDU (such as the ER PPDU described above). The transmission PPDU may include a first control signal field, a short training field (STF), a long training field (LTF), and a data field for interpreting the transmission PPDU. For example, the first control signal field may be a U-SIG field, and the second control signal field may be an EHT SIG field.

[0386] For example, the first control signal field can be the U-SIG field of the EHT MU PPDU. The U-SIG field consists of two symbols (i.e., U-SIG-1 and U-SIG-2). The first symbol (U-SIG-1) comprises a total of 26 bits, consisting of bits B0 to B25. On the first symbol (U-SIG-1), bits B0 to B2 are configured as PHY version identifiers and may include information about the PHY version of the transmitted PPDU. Bits B3 to B5 may include bandwidth information, and bit B6 may include a UL / DL indicator. Bits B7 to B12 may include BSS identification information for the transmitted PPDU, and bits B13 to B19 may include the duration information of the TXOP associated with the transmitted PPDU. The duration of the TXOP can be used for NAV setting of another STA. Furthermore, bits B20 to B25 can be used for functions defined below. Furthermore, within the second symbol (U-SIG-2), bits B0 to B1 may include information about the PPDU type and / or compression mode, and bit B2 may be used for the functions defined below; bits B3 to B7 may include information about the punctured channel; bit B8 may be used for the functions defined below; bits B9 to B10 may include MCS information applied to the second control signal field (e.g., the EHT SIG field); bits B11 to B15 may include information related to the number of symbols transmitted in the second control signal field; bits B16 to B19 may include CRC (i.e., the CRC calculated based on all 26 bits of U-SIG-1 and bits B0 to B15 of U-SIG-2); and bits B20 to B25 may include tail bits for BCC encoding.

[0387] Alternatively or additionally, the first control signal field may be a U-SIG field based on the ER preamble. The U-SIG field based on the ER preamble may include all or part of the U-SIG field of the EHT MU PPDU.

[0388] The U-SIG field of the EHT MU PPDU can be transmitted using a total of 2 symbols (e.g., 2 x 4μs symbols), and each symbol can be configured based on the BPSK constellation mapping. In contrast, the U-SIG field of the ER preamble can be transmitted using a total of 4 symbols (e.g., 4 x 4μs symbols), with U-SIG-1 transmitted using 2 symbols (the first / half of the 4 symbols) and U-SIG-2 also transmitted repeatedly using 2 symbols (the third / fourth of the 4 symbols). In this case, the BPSK constellation mapping is applied to the first / third / fourth of the 4 symbols, and the QBPSK constellation mapping (i.e., a mapping rotated 90 degrees counterclockwise relative to BPSK) can be applied to the second of the 4 symbols.

[0389] For example, the first control signal field (i.e., the U-SIG field) may include a type field that includes a type value associated with the replication transmission mode. For instance, the type field could be bits B0 to B1 of U-SIG-2. The receiving STA can know that it received the ER PPDU via the type field (i.e., the transmitting STA transmitted the PPDU based on the replication transmission mode). However, the type field is just one example of the signaling techniques used to indicate the ER PPDU, and the ER PPDU can be indicated by methods other than the type field.

[0390] More specifically, when bit B6 of U-SIG-1 (i.e., the UL / DL indicator) has a pre-configured / predefined value for DL ​​(e.g., '0') and bits B0 to B1 of U-SIG-2 (i.e., the aforementioned PPDU type field) have a specific first value (e.g., '1'), it can indicate that the corresponding PPDU was used for a single user (SU) or a null data packet (NDP). Furthermore, when transmitting an ER PPDU (i.e., when using a replicated transmission mode), bits B0 to B1 of U-SIG-2 (i.e., the aforementioned PPDU type field) are set to the first value (e.g., '1'). As a result, as described above, an entry in the PPDU type field can be used for an ER PPDU.

[0391] When bits B0 to B1 of U-SIG-2 (i.e., the PPDU type field mentioned above) have a first value (e.g., '1'), the second control signal field (i.e., the EHT-SIG field) may not include the subfield used for RU allocation.

[0392] On the other hand, when the transmit / receive PPDU is used for DL ​​OFDMA communication instead of ER PPDU, bits B0 to B1 of U-SIG-2 (i.e., the PPDU type field mentioned above) may have a second value (e.g., '0'). In this case, the second control signal field (i.e., the EHT-SIG field) may include a subfield for RU allocation.

[0393] On the other hand, when the transmit / receive PPDU is used for DL ​​MU-MIMO (i.e., non-OFDMA) communication instead of the ER PPDU, bits B0 to B1 of U-SIG-2 (i.e., the PPDU type field mentioned above) may have a third value (e.g., '2'). In this case, the second control signal field (i.e., the EHT-SIG field) may not include the subfield used for RU allocation.

[0394] The first control signal field (i.e., the U-SIG field) can be replicated every 20MHz in the frequency range, such as in... Figure 14 In the example.

[0395] When transmitting the ER PPDU of this specification, the second control signal field (i.e., the EHT-SIG field) can be transmitted based on the EHT-SIG content channel. One EHT-SIG content channel can occupy a 20MHz bandwidth. Furthermore, as in... Figure 28 In the example, an EHT-SIG content channel can be replicated every 20 MHz of frequency. For example, an EHT-SIG content channel may include common fields and user-specific fields. The common fields may include overflow information and may include, for example, additional control information (e.g., information about the number of receiving STAs). The user-specific fields may include control information for receiving STAs to receive ER PPDUs.

[0396] The data field may include a first data RU and a second data RU. The first data RU includes half the tone of the total bandwidth used to transmit the PPDU, and the second data RU replicates the first data RU in frequency. For example, when... Figure 1 When transmitting an 80MHz PPDU, the first data RU can be a 484-tone RU. Furthermore, when transmitting a 160MHz PPDU, the first data RU can be a 996-tone RU. Furthermore, when transmitting a 320MHz PPDU, the first data RU can be 2... 996-tone RU. That is, when the total bandwidth is 80MHz, the data RU including half the tones of the 80MHz band can be 484-tone RU. Furthermore, when the total bandwidth is 160MHz, the data RU including half the tones of the 160MHz band can be 996-tone RU. Furthermore, when the total bandwidth is 320MHz, the data RU including half the tones of the 320MHz band can be 2... 996-tone RU.

[0397] For example, the partial phase rotation used for PAPR reduction can be applied to the replicated second data RU. For example, the first half of the pitch of the second data RU can be multiplied by -1, and the second half by +1. In other words, a phase rotation based on [-1 1] can be applied to the replicated second data RU.

[0398] Preferably, low-level MCS technology is applied to each of the first and second data RUs. For example, each of the first and second data RUs can be modulated based on BPSK technology. Furthermore, dual-carrier modulation (DCM) technology is preferably applied to each of the first and second data RUs. That is, because DCM, BPSK, and frequency replication are all applied to the data RUs included in the ER PPDU of this specification, more robust transmission can be supported compared to existing technologies. Additionally, LDPC encoding can be applied to each of the first and second data RUs. Furthermore, each of the first and second data RUs can be transmitted via a single spatial stream.

[0399] Information regarding the MCS, encoding, number of streams, etc., applied to each of the first and second data RUs can be included in the user fields of the aforementioned user-specific fields. The user fields may include various control bits. For example, bits B0 to B10 in the user fields may include identification information about the receiving STA of the ER PPDU, bits B11 to B14 may be set to preset values ​​to indicate the BSPK and DCM applied to the ER PPDU, bits B16 to B19 may include information about the number of spatial streams applied to the ER PPDU (i.e., preset values ​​to indicate one stream), bit B20 may include information related to beamforming applied to the ER PPDU, and bit B21 may include preset values ​​to indicate the LDPC encoding applied to the ERPPDU.

[0400] The STF can be configured based on a preset STF sequence for the total bandwidth of the PPDU. For example, when the total bandwidth of the ER PPDU is 80MHz, the STF can be configured based on a pre-configured / predefined STF sequence for the 80MHz bandwidth. That is, from subcarrier index -496 to subcarrier index 496, there are coefficients for the STF sequence for the 80MHz bandwidth every 16 subcarriers, and the STF sequence _(-496:16:496)={M, 1, -M , 0, -M, 1, -M} (1 + j) / SQRT (2). For example, the M-sequence can be defined as {-1, -1, -1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, -1, 1, -1, 1}. Furthermore, when the total bandwidth of the ER PPDU is 160 / 320MHz, the STF can be configured based on a pre-configured / predefined STF sequence for the 160 / 320MHz bandwidth.

[0401] Furthermore, the LTF can be configured based on a pre-configured / predefined LTF sequence for the total bandwidth of the PPDU. For example, when the total bandwidth of the ER PPDU is 80MHz, the LTF can be configured based on a pre-configured / predefined LTF sequence for an 80MHz bandwidth. Similarly, when the total bandwidth of the ER PPDU is 160 / 320MHz, the LTF can be configured based on a pre-configured / predefined LTF sequence for a 160 / 320MHz bandwidth.

[0402] The STA can transmit the PPDU (S2820) constructed according to the above method via 6GHz band. The PPDU can be transmitted via full band without a preamble.

[0403] It can be done Figure 14 and / or Figure 28 The device performs Figure 29 The operation. For example, the transmission STA can be implemented as... Figure 29 and / or Figure 1 The device. Figure 14 and / or Figures 28 to 29 The processor can execute ​ The above operations. In addition. ​ and / or ​ The transceiver can perform ​ The operations described herein.

[0404] Furthermore, the apparatus described in this specification does not necessarily include a transceiver and can be implemented as a chip including a processor and memory. Such an apparatus can generate / store transmission PPDUs based on the examples above. This apparatus can be connected to a separately manufactured transceiver to support actual transmission and reception.

[0405] ​ This is a flowchart illustrating the operations performed in the receiving STA. ​ The operation can be performed by the user STA or the AP STA.

[0406] As shown in the figure, the receiving STA can receive reception PPDUs (Physical Protocol Data Units) (S2910). The received PPDU is represented as an ER transmission configuration PPDU, an EP PPDU, or a PPDU configured based on the copy transmission mode.

[0407] The receiving STA can decode the received Physical Protocol Data Unit (PPDU) based on the first control signal field (and / or the second control signal field) (S2920). For example, as described above, the first control signal field includes various information about the PPDU version, PPDU bandwidth, PPDU type, and the second control signal field. The receiving STA can begin decoding the received PPDU based on the information in the first control signal field. Additionally, the receiving STA decodes the second control information field based on various information included in the second control signal field (e.g., MCS information about the data field, etc.), and on this basis, it can further decode the user data included in the data field.

[0408] This specification provides for a computer-readable medium implemented in various forms. The computer-readable medium according to this specification can be encoded into at least one computer program including instructions. The instructions stored in the medium can control... ​ and / or ​ The processor described above. That is, the instructions stored in the medium control the processor described in this specification to perform the above-mentioned operations of transmitting / receiving STAs (e.g., ​ ).

[0409] The technical features described above in this specification are applicable to various applications or business models. For example, these technical features can be applied to wireless communication in devices that support artificial intelligence (AI).

[0410] Artificial intelligence (AI) refers to the research field concerning artificial intelligence or the methods for creating AI, while machine learning refers to the research field concerning methods for defining and solving various problems within the field of AI. Machine learning is also defined as algorithms that improve operational performance through stable operational experience.

[0411] Artificial neural networks (ANNs) are models used in machine learning, and can refer to an overall problem-solving model comprising artificial neurons (nodes) that form a network by combining synapses. An artificial neural network can be defined by the connection pattern between neurons in different layers, the learning process that updates model parameters, and the activation function that generates output values.

[0412] An artificial neural network may include an input layer, an output layer, and optionally one or more hidden layers. Each layer includes one or more neurons, and the artificial neural network may include synapses connecting the neurons. In an artificial neural network, each neuron may output a function value of an activation function that takes input signals, weights, and biases as input through the synapse.

[0413] Model parameters refer to the parameters determined through learning, and include the weights of synaptic connections and the biases of neurons. Hyperparameters refer to the parameters set in a machine learning algorithm before learning, and include the learning rate, number of iterations, mini-batch size, and initialization function.

[0414] Learning artificial neural networks aims to determine the model parameters used to minimize the loss function. The loss function can be used as an index to determine the optimal model parameters during the learning process of artificial neural networks.

[0415] Machine learning can be classified into supervised learning, unsupervised learning, and reinforcement learning.

[0416] Supervised learning refers to the method of training an artificial neural network with labeled training data, where the labels indicate the correct answer (or result value) that the artificial neural network should infer when the training data is input. Unsupervised learning refers to the method of training an artificial neural network without labeled training data. Reinforcement learning refers to a training method that defines an agent in the training environment to select actions or action sequences to maximize the cumulative reward in each state.

[0417] Machine learning that utilizes deep neural networks (DNNs) with multiple hidden layers, including artificial neural networks, is called deep learning, and deep learning is a part of machine learning. In the following text, machine learning is interpreted as including deep learning.

[0418] The above-mentioned technical features can be applied to wireless communication of robots.

[0419] A robot can refer to a machine that automatically processes or operates a given task using its own capabilities. Specifically, a robot that has the ability to recognize its environment and autonomously make judgments to perform operations can be called an intelligent robot.

[0420] Robots can be classified according to their purpose or field, such as industrial, medical, household, and military robots. A robot may include actuators or drives, which include motors to perform various physical operations (e.g., moving robot joints). Additionally, mobile robots may include wheels, brakes, propellers, etc., in their drives to move on the ground or fly in the air.

[0421] The aforementioned technical features can be applied to devices that support extended reality.

[0422] Extended reality collectively refers to virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology is a computer graphics technology that provides real-world objects and backgrounds only in CG images; AR technology is a computer graphics technology that provides virtual CG images on top of real object images; and MR technology is a computer graphics technology that provides virtual objects that are mixed and combined with the real world.

[0423] The similarity between MR and AR technologies lies in the fact that real and virtual objects are displayed together. However, in AR, virtual objects serve as a complement to real objects, while in MR, virtual and real objects are displayed as equal entities.

[0424] XR technology can be applied to head-mounted displays (HMDs), head-up displays (HUDs), mobile phones, tablet PCs, laptops, desktop computers, TVs, digital signage, and more. Devices that utilize XR technology can be referred to as XR devices.

Claims

1. A method in a wireless local area network (LAN), the method comprising: Configure Physical Protocol Data Units (PPDUs) based on the replication transport mode. The PPDU includes a Universal Signal (U-SIG) field for interpreting the PPDU, an Extremely High Throughput Signal (EHT-SIG) field including a Modulation and Coding Scheme (MCS) field, a Short Training Field (STF), a Long Training Field (LTF), and a data field. The U-SIG field has a length of 2 symbols. The U-SIG field includes a physical version (PHY) identifier with a length of 3 bits. The U-SIG field further includes a type field, which has a type value related to the replication transfer mode. The PPDU is an 80MHz PPDU, with the U-SIG field replicated every 20MHz in the frequency domain, and the EHT-SIG field is configured based on an EHT-SIG content channel and replicated every 20MHz in the frequency domain. The data field includes a first 484-tone resource unit (RU) and a second 484-tone RU, and the first 484-tone RU is copied to the second 484-tone RU. The STF is configured based on an 80 MHz EHT STF sequence, and The LTF is configured based on an 80 MHz EHT LTF sequence; and Transmit the PPDU.

2. The method according to claim 1, in, The STF is EHT-STF, wherein the LTF is EHT-LTF.

3. The method according to claim 1, in, The included type field has a length of 2 bits. The type field has a first value associated with the replication transmission mode, a second value associated with downlink (DL) orthogonal frequency division multiple access (OFDMA) transmission, and a third value associated with non-OFDMA DL multiple user multiple input multiple output (MU-MIMO) transmission.

4. The method according to claim 1, wherein, The PPDU is transmitted via a 6GHz band without a preamble.

5. A method in a wireless local area network (LAN), the method comprising: Physical Protocol Data Units (PPDUs) are received based on the copy transmission mode. The PPDU includes a Universal Signal (U-SIG) field for interpreting the PPDU, an Extremely High Throughput Signal (EHT-SIG) field including a Modulation and Coding Scheme (MCS) field, a Short Training Field (STF), a Long Training Field (LTF), and a data field. The U-SIG field has a length of 2 symbols. The U-SIG field includes a physical version (PHY) identifier with a length of 3 bits. The U-SIG field further includes a type field, which has a type value related to the replication transfer mode. The PPDU is an 80MHz PPDU, with the U-SIG field replicated every 20MHz in the frequency domain, and the EHT-SIG field is configured based on an EHT-SIG content channel and replicated every 20MHz in the frequency domain. The data field includes a first 484-tone resource unit (RU) and a second 484-tone RU, and the first 484-tone RU is copied to the second 484-tone RU. The STF is configured based on an 80 MHz EHT STF sequence, and The LTF is configured based on an 80 MHz EHT LTF sequence; and The PPDU is decoded based on the U-SIG field and the EHT-SIG field.

6. A wireless local area network (LAN) station (STA), comprising: A transceiver that transmits wireless signals; as well as The processor controls the transceiver. The processor is adapted to: Configure Physical Protocol Data Units (PPDUs) based on the replication transport mode. The PPDU includes a Universal Signal (U-SIG) field for interpreting the PPDU, an Extremely High Throughput Signal (EHT-SIG) field including a Modulation and Coding Scheme (MCS) field, a Short Training Field (STF), a Long Training Field (LTF), and a data field. The U-SIG field has a length of 2 symbols. The U-SIG field includes a physical version (PHY) identifier with a length of 3 bits. The U-SIG field further includes a type field, which has a type value related to the replication transfer mode. The PPDU is an 80MHz PPDU, with the U-SIG field replicated every 20MHz in the frequency domain, and the EHT-SIG field is configured based on an EHT-SIG content channel and replicated every 20MHz in the frequency domain. The data field includes a first 484-tone resource unit (RU) and a second 484-tone RU, and the first 484-tone RU is copied to the second 484-tone RU. The STF is configured based on an 80 MHz EHT STF sequence, and The LTF is configured based on an 80 MHz EHT LTF sequence; and Transmit the PPDU.

7. A wireless local area network (LAN) station (STA), comprising: A transceiver that transmits wireless signals; as well as The processor controls the transceiver. The processor is adapted to: Physical Protocol Data Units (PPDUs) are received based on the copy transmission mode. The PPDU includes a Universal Signal (U-SIG) field for interpreting the PPDU, an Extremely High Throughput Signal (EHT-SIG) field including a Modulation and Coding Scheme (MCS) field, a Short Training Field (STF), a Long Training Field (LTF), and a data field. The U-SIG field has a length of 2 symbols. The U-SIG field includes a physical version (PHY) identifier with a length of 3 bits. The U-SIG field further includes a type field, which has a type value related to the replication transfer mode. The PPDU is an 80MHz PPDU, with the U-SIG field replicated every 20MHz in the frequency domain, and the EHT-SIG field is configured based on an EHT-SIG content channel and replicated every 20MHz in the frequency domain. The data field includes a first 484-tone resource unit (RU) and a second 484-tone RU, and the first 484-tone RU is copied to the second 484-tone RU. The STF is configured based on an 80 MHz EHT STF sequence, and The LTF is configured based on an 80 MHz EHT LTF sequence; and The PPDU is decoded based on the U-SIG field and the EHT-SIG field.

Images