Method and apparatus for transmitting PPDU by accessing non-primary channel in wireless LAN system

Abstract

A method and an apparatus for transmitting a PPDU by accessing a non-primary channel in a wireless LAN system are presented. In particular, a receiving STA performs backoff for a first non-primary channel. When the value of backoff for the first non-primary channel is 0, the receiving STA performs channel access for the second non-primary channel. The receiving STA transmits the PPDU to the transmitting STA through an idle channel among the first non-primary channel and the second non-primary channel. The first non-primary channel is a secondary 20 MHz channel capable of backoff when an NAV is set in the primary 20 MHz channel. The second non-primary channel is a secondary channel other than the first non-primary channel in the BSS operating channels.

Description

Technical Field

[0001] This disclosure relates to techniques for transmitting physical layer protocol data units (PPDUs) in a wireless local area network (WLAN) system by accessing a non-primary channel, and more specifically, to methods and apparatus for configuring constrained rules for determining the location of a non-primary channel within the basic service set (BSS) operational channel of an access point (AP). Background Technology

[0002] Next-generation Wi-Fi (e.g., IEEE 802.11be and / or later) is designed to support ultra-high reliability when transmitting signals to STAs. To achieve this, various technologies are considered to support high throughput, low latency, and extended range. For example, procedures for accessing non-master channels can be performed. Summary of the Invention

[0003] Technical issues

[0004] This specification provides methods and apparatus for transmitting PPDUs via access non-master channels in a wireless LAN system.

[0005] Technical solution

[0006] The examples in this disclosure present a method for transmitting PPDUs via access to a non-master channel.

[0007] This implementation can be performed in a network environment that supports next-generation WLAN systems (Ultra-High Reliability (UHR) WLAN systems or next-generation Wi-Fi). Next-generation WLAN systems are improved 802.11be systems and can meet backward compatibility requirements with 802.11be systems.

[0008] This implementation is performed in the receiving STA, and the receiving STA may involve at least one station (STA). The transmitting STA in this implementation may involve an access point (AP).

[0009] This embodiment proposes a method for transmitting and receiving Physical Layer Protocol Data Units (PPDUs) by performing backoff for a non-primary channel and, based on this, performing channel access for another non-primary channel. Specifically, this embodiment proposes constrained rules for determining the location of non-primary channels within the Basic Service Set (BSS) operational channels of an Access Point (AP).

[0010] The receiving station (STA) performs backoff for the first non-primary channel.

[0011] Based on a backoff value of 0 for the first non-primary channel, the receiving STA performs channel access for the second non-primary channel.

[0012] The receiving STA sends a PPDU to the transmitting STA through an idle channel between the first and second non-primary channels.

[0013] The first non-primary channel is a secondary 20 MHz channel that can perform backoff when a network allocation vector (NAV) is set in the primary 20 MHz channel.

[0014] The second non-primary channel is the remaining auxiliary channel in the BSS operation channel, excluding the first non-primary channel.

[0015] The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

[0016] For example, this embodiment proposes a method for performing channel access for a non-primary channel (or secondary channel) when a NAV (here, basic NAV) is set in the primary 20 MHz channel.

[0017] Beneficial effects

[0018] This implementation has the following advantages: by proposing a constrained rule for determining the location of non-primary channels within the BSS operation channel of the AP, the channel utilization in terms of PPDU perforation mode and bandwidth is maximized. Furthermore, based on the fact that this implementation determines non-primary channels considering the overlap of OBSS services and non-primary channels, it offers advantages in terms of the probability of performing channel access for non-primary channels, and also improves the efficiency of broadband utilization. Attached Figure Description

[0019] Figure 1 Examples of transmitting and / or receiving devices are shown in this specification.

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

[0021] Figure 3 This illustrates a typical link establishment process.

[0022] Figure 4 An example of multi-link (ML) is shown.

[0023] Figure 5 Examples of Physical Protocol Data Units or Physical Layer (PHY) Protocol Data Units (PPDUs) transmitted / received by the STA of this disclosure are shown.

[0024] Figure 6 This is a diagram illustrating the layout of a resource unit (RU) for a 20 MHz PPDU.

[0025] Figure 7The layout of a resource unit (RU) for a 40 MHz PPDU is illustrated.

[0026] Figure 8 This is a diagram illustrating the layout of a resource unit (RU) for an 80 MHz PPDU.

[0027] Figure 9 The operation related to UL-MU is shown.

[0028] Figure 10 An example of using / supporting / defining a channel within the 2.4 GHz band is shown.

[0029] Figure 11 An example of using / supporting / defining a channel within the 5 GHz band is shown.

[0030] Figure 12 An example of using / supporting / defining a channel within the 6 GHz band is shown.

[0031] Figure 13 An example of a MAC frame header is shown.

[0032] Figure 14 Examples of modifications to the transmitting and / or receiving apparatus described herein are illustrated.

[0033] Figure 15 An example of channel access in an 802.11 wireless LAN system is shown.

[0034] Figure 16 An example of the basic procedures for SCA is shown.

[0035] Figure 17 The basic secondary channel access operation procedure for STA is shown.

[0036] Figure 18 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 320 MHz and SCA P20 is the fifth 20 MHz channel.

[0037] Figure 19 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 160 MHz and SCA P20 is the second 20 MHz channel.

[0038] Figure 20 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 160 MHz and the SCA P20 is the third 20 MHz channel.

[0039] Figure 21An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 160 MHz and SCA P20 is the fifth 20 MHz channel.

[0040] Figure 22 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 320 MHz and SCA P20 is the second 20 MHz channel.

[0041] Figure 23 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 320 MHz and the SCA P20 is the third 20 MHz channel.

[0042] Figure 24 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 320 MHz and SCA P20 is the ninth 20 MHz channel.

[0043] Figure 25 An example of transmitting wideband frames in secondary channel access is illustrated when the BSS operating bandwidth is 160 MHz and SCA P20 is the second 20 MHz channel.

[0044] Figure 26 An example is given of transmitting wideband frames in secondary channel access when the BSS operating bandwidth is 160 MHz and SCA P20 is the third 20 MHz channel.

[0045] Figure 27 An example of transmitting wideband frames in secondary channel access is shown when the BSS operating bandwidth is 160 MHz and SCA P20 is the fifth 20 MHz channel.

[0046] Figure 28 An example of a channel configuration is shown based on a BSS operating bandwidth of 80 MHz and an SCA P20 secondary channel access as a second 20 MHz channel.

[0047] Figure 29 An example of a channel configuration is shown based on a secondary channel access with a BSS operating bandwidth of 80 MHz and SCA P20 being a third 20 MHz channel.

[0048] Figure 30 This is a flowchart illustrating the operation of the transmitting device according to this embodiment.

[0049] Figure 31 This is a flowchart illustrating the operation of the receiving device according to this embodiment.

[0050] Figure 32This is a flowchart illustrating the process of transmitting a STA accessing a non-master channel and receiving a PPDU according to this embodiment.

[0051] Figure 33 This is a flowchart illustrating the process of receiving a STA accessing a non-master channel and transmitting a PPDU according to this embodiment. Detailed Implementation

[0052] In this disclosure, "A or B" can mean "A only", "B only", or "both A and B". In other words, in this disclosure, "A or B" can be interpreted as "A and / or B". For example, in this disclosure, "A, B or C" can mean "A only", "B only", "C only", or "any combination of A, B, and C".

[0053] The forward slash ( / ) or comma used in this disclosure can represent "and / or". For example, "A / B" can mean "A and / or B". Therefore, "A / B" can mean "A only", "B only", or "both A and B". For example, "A, B, C" can mean "A, B, or C".

[0054] In this disclosure, "at least one of A and B" can mean "only A", "only B" or "both A and B". Additionally, in this disclosure, the expression "at least one of A or B" or "at least one of A and / or B" can be interpreted as "at least one of A and B".

[0055] The brackets used in this disclosure may indicate "for example". Specifically, when indicated as "control information (UHR-signal field)", it may indicate that the "UHR-signal field" is cited as an example of "control information". In other words, the "control information" of this disclosure is not limited to the "UHR-signal field", and the "UHR-signal field" may also be cited as an example of "control information". Furthermore, when indicated as "control information (i.e., UHR-signal field)", it may also indicate that the "UHR-signal field" is cited as an example of "control information".

[0056] Furthermore, as used in this disclosure, "a" can mean "at least one" or "one or more". Additionally, terms ending in "(s)" can mean "at least one" or "one or more".

[0057] Furthermore, as used in this disclosure, the expressions “based on”, “on the basis of”, or “according to” mean “at least partially based on”, and not “based on only”.

[0058] The technical features described individually in one of the accompanying drawings of this disclosure may be implemented individually or simultaneously.

[0059] The following examples of this disclosure can be applied to various wireless communication systems. For example, the following examples of this disclosure can be applied to wireless local area network (WLAN) systems. For example, this disclosure can be applied to the IEEE 802.11 a / g / n / ac / ax / be / bn standards. Furthermore, the examples of this disclosure can also be applied to next-generation wireless LAN standards such as enhanced Ultra High Reliability (UHR) standards or IEEE 802.11 bn. Additionally, the examples of this disclosure can be applied to new WLAN standards enhanced from EHT standards or IEEE 802.11be standards. Furthermore, the examples of this disclosure can be applied to mobile communication systems. For example, it can be applied to mobile communication systems based on Long Term Evolution (LTE), which relies on 3GPP standards and is based on LTE evolution. Furthermore, the examples of this disclosure can be applied to communication systems based on the 5G NR standard of 3GPP standards.

[0060] In the following text, for the purpose of describing the technical features of this disclosure, technical features applicable to this disclosure will be described.

[0061] Figure 1 Examples of transmitting and / or receiving devices of this disclosure are shown.

[0062] exist Figure 1 In the example, the various technical features described below can be implemented. Figure 1 At least one station (STA) is involved. For example, STA 110 and 120 of this disclosure may also be referred to by various terms such as mobile terminal, wireless device, wireless transceiver unit (WTRU), user equipment (UE), mobile station (MS), mobile subscriber unit, or simply user. STA 110 and 120 of this disclosure 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 of this disclosure may also be referred to by various names such as receiving device, transmitting device, receiving STA, transmitting STA, receiving device, transmitting device, etc.

[0063] For example, STA 110 and 120 can be used as AP or non-AP. That is, STA 110 and 120 of this disclosure can be used as AP and / or non-AP. In this disclosure, AP can be indicated as AP STA.

[0064] In addition to the IEEE 802.11 standard, the STAs 110 and 120 of this disclosure can together support various communication standards. For example, they can support communication standards based on 3GPP standards (e.g., LTE, LTE-A, 5G NR standards). Furthermore, the STAs of this disclosure can be implemented in various devices such as mobile phones, vehicles, and personal computers. Additionally, the STAs of this disclosure can support communication for various communication services such as voice calls, video calls, data communication, and autonomous driving.

[0065] The STA 110 and 120 disclosed herein may include media access control (MAC) conforming to the IEEE 802.11 standard and a physical layer interface for radio media.

[0066] The following will refer to Figure 1 The subgraph (a) is used to describe STA 110 and 120.

[0067] The first STA 110 may include a processor 111, a memory 112, and a transceiver 113. The illustrated processor, memory, and transceiver may be implemented as separate chips, or at least two blocks / functions may be implemented as a single chip.

[0068] 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.).

[0069] For example, the first STA 110 can perform the operations expected 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).

[0070] For example, the second STA 120 can perform operations not expected of an AP STA. For example, a 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.).

[0071] 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).

[0072] For example, the operation of a device designated as an AP in the disclosure described 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.

[0073] For example, in the disclosure described 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.

[0074] In the disclosure described below, devices referred to as (transmitting / receiving) STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmitting / receiving) terminal, (transmitting / receiving) device, (transmitting / receiving apparatus), network, etc., may implicitly refer to Figure 1 STAs 110 and 120. For example, devices indicated as (but without specific labels) (transmitting / receiving) STA, First STA, Second STA, STA1, STA2, AP, First AP, Second AP, AP1, AP2, (transmitting / receiving) terminal, (transmitting / receiving) device, (transmitting / receiving) device, network, etc., can be implied. Figure 1 STAs 110 and 120. For example, in the following example, the operation of various STA transmit / receive signals (e.g., PPDU) can be... Figure 1 The operation is performed in transceivers 113 and 123. Additionally, in the following examples, various STAs can generate TX / RX signals or perform data processing and calculations on TX / RX signals in advance. Figure 1 The operations are executed in processors 111 and 121. Examples of operations for generating TX / RX signals or performing prior 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 used by various STAs to determine / obtain / configure / calculate / decode / decode the TX / RX signal (e.g., information related to fields / subfields / control fields / parameters / power, etc.) may be stored in the STA. Figure 1 In memory 112 and 122.

[0075] 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 subgraph (b) is used to describe STA 110 and STA 120 of this disclosure.

[0076] For example, Figure 1The 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 1 The processing chips 114 and 124 shown in sub-figure (b) may include processors 111 and 121 and memories 112 and 122. Figure 1 The processors 111 and 121 and the memories 112 and 122 shown in 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.

[0077] The mobile terminal, wireless device, wireless transceiver unit (WTRU), user equipment (UE), mobile station (MS), mobile subscriber unit, user, user STA, network, base station, node B, access point (AP), repeater, router, relay, receiving unit, transmitting unit, receiving STA, transmitting STA, receiving device, transmitting device, receiving device and / or transmitting device 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, the technical features of this disclosure can be... 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-diagrams (a) and (b). For example, the technical features of transmitting control signals by a STA can be understood as being achieved through... Figure 1 The transceiver 113 illustrated in subgraphs (a) / (b) transmits in Figure 1 The technical features of the control signals generated in processors 111 and 121 are illustrated in sub-figures (a) and (b). Alternatively, the technical features of the STA transmitting 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).

[0078] 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 are shown in sub-figure (a). Alternatively, the technical features of receiving STA control signals can be understood as being achieved through... Figure 1 Processors 111 and 121 shown in subgraph (a) obtain Figure 1The technical features of the control signals received in transceivers 113 and 123 shown in sub-figure (a) are illustrated. Alternatively, the technical features of receiving control signals by the STA can be understood as being achieved through... Figure 1 The processing chips 114 and 124 shown in sub-figure (b) obtain Figure 1 Technical features of the control signals received in transceivers 113 and 123 as shown in sub-figure (b).

[0079] refer to Figure 1 Subgraph (b), software codes 115 and 125 can be included in memories 112 and 122. Software codes 115 and 125 can include instructions for controlling the operation of processors 111 and 121. Software codes 115 and 125 can be included in various programming languages.

[0080] Figure 1 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 1 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 1 The processors 111 and 121 or the processor chips 114 and 124 may be SNAPDRAGON™ series processors manufactured by Qualcomm®, EXYNOS™ series processors manufactured by Samsung®, A series processors manufactured by Apple®, HELIO™ series processors manufactured by MediaTek®, ATOM™ series processors manufactured by Intel®, or processors enhanced from these processors.

[0081] In this disclosure, an 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 via the uplink. Similarly, in this disclosure, a 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 via the downlink.

[0082] Figure 2 This is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0083] Figure 2 The upper part illustrates the structure of the Infrastructure Basic Services Set (BSS) of the Institute of Electrical and Electronics Engineers (IEEE) 802.11.

[0084] Figure 2 The upper part illustrates the structure of the Infrastructure Basic Services Set (BSS) of the Institute of Electrical and Electronics Engineers (IEEE) 802.11.

[0085] refer to Figure 2 The 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.

[0086] BSS may include at least one STA, APs 255 and 230 that provide distributed services, and a distributed system (DS) 210 that connects multiple APs.

[0087] 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 can have the same Service Set Identifier (SSID).

[0088] Portal 220 can be used as a bridge to connect a wireless LAN network (IEEE 802.11) to another network (e.g., 802.X).

[0089] exist Figure 2 The BSS shown at the top allows for 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).

[0090] Figure 2 The lower part illustrates a concept diagram, exemplifying IBSS.

[0091] refer to Figure 2The 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.

[0092] Figure 3 This example illustrates the typical link establishment process.

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

[0094] Figure 3 An example of network discovery operations including active scanning is provided. In active scanning, the STA performing the scan sends a probe request frame and waits for a response to the probe request frame in order to identify which APs are present in the vicinity while moving to a channel. The responder sends a probe response frame to the STA that sent the probe request frame as a response to the probe request frame. Here, the responder can be the STA that sent the last beacon frame in the BSS of the channel being scanned. In the BSS, the AP is the responder because it sends the beacon frame. In the IBSS, the responder is not fixed because the STAs in the IBSS take turns sending beacon frames. For example, when an STA sends a probe request frame via channel 1 and receives a probe response frame via channel 1, the STA can store the BSS-related information included in the received probe response frame, can move to the next channel (e.g., channel 2), and can perform a scan in the same way (e.g., sending a probe request and receiving a probe response via channel 2).

[0095] Although Figure 3As not shown, scanning can be performed using a passive scanning method. In passive scanning, the STA performing the scan can wait for beacon frames while moving to a channel. Beacon frames are one of the management frames in IEEE 802.11 and are periodically sent to indicate the presence of a wireless network and enable the STA performing the scan to find and join the wireless network. In a BSS, the AP periodically sends beacon frames. In an IBSS, STAs in the IBSS take turns sending beacon frames. Upon receiving a beacon frame, the STA performing the scan stores information about the BSS included in the beacon frame and records the beacon frame information for each channel, while moving to another channel. The STA receiving the beacon frame can store the BSS-related information included in the received beacon frame, can move to the next channel, and can perform a scan on the next channel using the same method.

[0096] After network discovery, the STA can perform authentication processing in S320. This authentication processing can be referred to as the first authentication processing to clearly distinguish it from the subsequent security establishment operation in S340. The authentication processing in S320 may include the STA sending an authentication request frame to the AP and the AP sending an authentication response frame to the STA in response. The authentication frame used for the authentication request / response is a management frame.

[0097] An authentication frame may include information about the authentication algorithm number, authentication transaction sequence number, status code, challenge text, robust security network (RSN), and finite cyclic group.

[0098] The STA can send an authentication request frame to the AP. The AP can determine whether to allow the STA's authentication based on the information included in the received authentication request frame. The AP can then provide the authentication processing result to the STA via an authentication response frame.

[0099] When a STA is successfully authenticated, it can perform association processing in S330. Association processing includes the STA sending an association request frame to the AP, and the AP responding by sending an association response frame to the STA. For example, the association request frame may include information about various capabilities, beacon listening interval, service set identifier (SSID), supported rates, supported channels, RSN, mobile domain, supported operation classes, service indication map (TIM) broadcast request, and interoperability service capabilities. Similarly, the association response frame may include information about various capabilities, status codes, association ID (AID), supported rates, enhanced distributed channel access (EDCA) parameter set, received channel power indicator (RCPI), received signal-to-noise ratio indicator (RSNI), mobile domain, timeout interval (association recovery time), overlapping BSS scan parameters, TIM broadcast response, and QoS map.

[0100] In the S340, the STA can perform security establishment processes. The security establishment processes in the S340 may include the process of establishing a private key via a four-way handshake (e.g., via Extensible Authentication Protocol (EAPOL) frames over the LAN).

[0101] Figure 4 An example of multi-link (ML) is shown.

[0102] like Figure 4 As illustrated, multiple multi-link devices (MLDs) can communicate via a remote link. MLDs can be classified as AP MLDs, which include multiple AP STAs, and non-AP MLDs, which include multiple non-AP STAs. That is, an AP MLD may include affiliated APs (i.e., AP STAs), and a non-AP MLD may include affiliated STAs (i.e., non-AP STAs or user STAs).

[0103] A multi-link system may include a first link and a second link, and different channel / subchannel / frequency resources may be allocated to the first link and the second link. The first and second multi-link systems can be identified by a 4-bit (or other n-bit) link ID. The first and second links can be configured in the same 2.4 GHz, 5 GHz, or 6 GHz frequency band. Alternatively, the first and second links can be configured in different frequency bands.

[0104] Figure 4 The AP MLD includes three affiliated APs. Figure 4 In the example, AP1 can operate in the 2.4 GHz band, AP2 can operate in the 5 GHz band, and AP3 can operate in the 6 GHz band. Figure 4 In the example, the first link in which AP1 and non-AP1 operate can be defined as a channel / subchannel / frequency resource within the 2.4 GHz band. Furthermore, in Figure 4 In the example, the second link in which AP2 and non-AP2 operate can be defined as a channel / subchannel / frequency resource within the 5 GHz band. Furthermore, in Figure 4 In the example, the third link in which AP3 and non-AP3 operate can be defined as a channel / subchannel / frequency resource within the 6GHz band.

[0105] exist Figure 4 In the example, AP1 can initiate the multi-link establishment process (ML establishment process) by sending an association request frame to a non-AP STA1. Figure 4 In the example, a non-AP STA1 can send an association response frame in response to an association request frame. Figure 4 The individual APs shown (e.g., AP1 / 2 / 3) can be compared with... Figure 1 and / or Figure 2 The APs shown are the same, and Figure 4 The various non-APs shown (e.g., non-AP1 / 2 / 3) can be compared with... Figure 1 and / or Figure 2 The STAs shown are the same (i.e., user STAs or non-AP STAs).

[0106] The specific features of this disclosure are not limited to Figure 4 The specific characteristics are as follows. That is, the number of links can be defined in various ways, and multiple links can be defined in at least one frequency band in various ways.

[0107] Figure 5 Examples of Physical Protocol Data Units or Physical Layer (PHY) Protocol Data Units (PPDUs) transmitted / received by the STA of this disclosure are shown.

[0108] The STA (e.g., AP STA, non-AP STA, AP MLD, non-AP MLD) disclosed herein can send and / or receive. Figure 5 The PPDU described in this disclosure may have, for example... Figure 5 The structure is as follows. Furthermore, the PPDU described in this disclosure may be referred to by various names, such as transmit PPDU, receive PPDU, type 1 or type N PPDU, etc. The PPDU described in this disclosure can be used in WLAN systems defined according to IEEE 802.11bn and / or in next-generation WLAN systems that improve upon IEEE 802.11bn.

[0109] Figure 5 The PPDU can encompass various PPDU types used in UHR systems. For example, Figure 5 Examples can be used for at least one of the following modes related to channel detection: single-user (SU) mode / type / transmission, multi-user (MU) mode / type / transmission, and null packet (NDP) mode / type / transmission. For example, if Figure 5 If the example involves NDP, the data fields shown can be omitted. Figure 5 The PPDU is used in trigger-based (TB) mode and can be omitted. Figure 6 The UHR-SIG. In other words, a STA that has received a trigger frame for uplink-MU (UL-MU) communication can send a UHR-SIG. Figure 5 The UHR-SIG PPDU is omitted in the example.

[0110] exist Figure 5In this context, L-STF or UHR-LTF can be referred to as a preamble or physical preamble, and can be generated / transmitted / received / acquired / decoded at the physical layer (including in the transmit / receive STA).

[0111] Figure 5 The blocks illustrated can be referred to as fields / subfields / signals, etc. These fields / subfields / signals can be named as Traditional Short Training Field (L-STF), Traditional Long Training Field (L-LTF), Traditional Signal (L-SIG), Repeated L-SIG (RL-SIG), Universal Signal (U-SIG), UHR Signal (UHR-SIG), etc., such as... Figure 5 exemplified.

[0112] Figure 5 The subcarrier spacing of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and UHR-SIG fields can be determined to be 312.5 kHz, and the subcarrier spacing of the UHR-STF, UHR-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 UHR-SIG fields can be represented in units of 312.5 kHz, and the tone index (or subcarrier index) of the UHR-STF, UHR-LTF, and Data fields can be represented in units of 78.125 kHz.

[0113] exist Figure 5 In the PPDU, the L-LTF and L-STF can be the same as those in the conventional domain (e.g., non-HT LTF and non-HT STF defined in conventional WLAN standards).

[0114] Figure 5The L-SIG field can include, for example, 24 bits of bit information. For instance, the 24 bits could 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 could 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-High Throughput (HT), High Throughput (HT), Very High Throughput (VHT) PPDU, Extremely High Throughput (EHT) PPDU, or UHR 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 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, EHT, or UHR PPDUs, the length field value can be set to a multiple of 3, and for high-efficiency (HE) PPDUs, the length field value can be set to either a multiple of 3 + 1 or a multiple of 3 + 2. In other words, the LENGTH field in a UHR PPDU is set to a value that satisfies the condition that LENGTH divided by 3 leaves a remainder of 0.

[0115] For example, a (non-AP and AP) STA can apply BCC encoding 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 encoded bits. BPSK modulation can be applied to these 48 encoded 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 additionally map the signal {-1, -1, -1, 1} to subcarrier indices {-28, -27, +27, +28}. The aforementioned signals can be used for channel estimation in the frequency domain corresponding to {-28, -27, +27, +28}.

[0116] For example, a (non-AP and AP) STA can generate an RL-SIG in the same way as the L-SIG. BPSK modulation can be applied to the RL-SIG. Based on the presence of the RL-SIG, the (non-AP and AP) STA can know that the RX PPDU is an HE PPDU, EHT PPDU, or UHR PPDU. In other words, if the RL-SIG is present, the receiving (non-AP and AP) STA can know that the received PPDU is one of an HE PPDU, EHT PPDU, or UHR PPDU. In other words, if the RL-SIG is not present, the receiving (non-AP and AP) STA can know that the received PPDU is one of a non-HT PPDU, HT PPDU, or VHT PPDU. In other words, the RL-SIG field is a repetition of the L-SIG field and is used to distinguish UHR PPDUs from non-HT PPDUs, HT PPDUs, and VHT PPDUs.

[0117] Universal SIG (U-SIG) can be inserted in Figure 5 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, Common Control Field, Common Control Field, etc.

[0118] U-SIG can include N bits of information and may include information to identify the type of EHT PPDU. For example, U-SIG can be configured based on two symbols (e.g., two consecutive OFDM symbols). Each symbol used for U-SIG (e.g., an OFDM symbol) can have a duration of 4 μs. Each symbol of U-SIG can be used to transmit 26 bits of information. For example, each symbol of U-SIG can be transmitted / received based on 52 data tones and 4 pilot tones.

[0119] Through U-SIG, for example, A bits of information (e.g., 52 uncoded bits) can be transmitted. The first symbol of U-SIG can transmit the first X bits of the A bits of information (e.g., 26 uncoded bits), and the second symbol of U-SIG can transmit the remaining Y bits of the A bits of information (e.g., 26 uncoded bits). For example, the transmitting STA can obtain the 26 uncoded bits included in each U-SIG symbol. The transmitting STA can perform convolutional coding (i.e., BCC coding) based on a rate of R=1 / 2 to generate 52 coded bits, and can perform interleaving on the 52 coded bits. The transmitting STA can perform BPSK modulation on the interleaved 52 coded bits to generate 52 BPSK symbols to be 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 transmitting STA can be transmitted based on the remaining tones (subcarriers) other than the pilot tone, namely tones -21, -7, +7, and +21.

[0120] For example, the A-bit information generated by U-SIG (e.g., 52 uncoded bits) may include a CRC field (e.g., a 4-bit field) and a tail field (e.g., a 6-bit field). The CRC and tail fields can be sent via a 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 from 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 trellis of the convolutional decoder and can be set to, for example, "000000".

[0121] The A-bit information (e.g., 52 uncoded bits) sent 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 or 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 using various terms such as first control bit, second control bit, etc.

[0122] For example, the version-independent bits of the U-SIG can include a 3-bit PHY version identifier. For example, the 3-bit PHY version identifier can include information related to the PHY version of the TX / RX PPDU. For example, the first value of the 3-bit PHY version identifier (e.g., a value of 000) can indicate that the TX / RX PPDU is an EHT PPDU. Furthermore, the second value of the 3-bit PHY version identifier (e.g., a value of 001) can indicate that the TX / RX PPDU is a UHR PPDU.

[0123] In other words, when an (AP / non-AP) STA sends an EHT PPDU, the 3-bit PHY version identifier can be set to a first value, and when an (AP / non-AP) STA sends a UHR PPDU, the 3-bit PHY version identifier can be set to a second value. In other words, the receiving (AP / non-AP) STA can determine that the received PPDU is an EHT PPDU based on the PHY version identifier with the first value, and can determine that the received PPDU is a UHR PPDU based on the PHY version identifier with the second value.

[0124] 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 is related to UL communication, and the second value of the UL / DL flag field is related to DL communication.

[0125] For example, the version-independent bits of U-SIG can include information related to the transmission opportunity (TXOP) length and information related to the BSS color ID.

[0126] For example, if the UHR PPDU is classified into various types (e.g., types related to SU transmission (based on UL or DL), types related to DL transmission, types related to NDP transmission, types related to DL non-MU-MIMO, types related to DL MU-MIMO, types related to multi-AP operation, types related to Co-BF beamforming (Co-BF), spatial reuse (SR), types related to Co-OFDMA (C-OFDMA), and types related to Co-TDMA (Co-TDMA), then information about the type of UHR PPDU (e.g., 2-bit or 3-bit information) can be included in the version-related bits of the U-SIG.

[0127] For example, U-SIG may include: 1) a bandwidth field including information related to bandwidth; 2) a field including information related to the modulation and demodulation scheme (MCS) applied to UHR-SIG; 3) an indication field including information related to whether a dual subcarrier modulation (DCM) scheme is applied to UHR-SIG; 4) a field including information related to the number of symbols used for UHR-SIG; 5) a field including information related to whether UHR-SIG is generated across the entire frequency band; 6) a field including information related to the type of UHR-LTF / STF; and 7) information related to fields indicating the length of UHR-LTF and the length of CP.

[0128] Can be Figure 5 The PPDU uses a preamble puncturing. A preamble puncturing means that a puncturing is applied to a portion of the full frequency band (e.g., the secondary 20 MHz band). For example, when transmitting an 80 MHz PPDU, the STA can apply a puncturing 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.

[0129] 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 any one of the two secondary 20 MHz bands within the secondary 40 MHz band included in the 80 MHz band. For example, when applying the third perforation pattern, perforation can be applied only to the secondary 20 MHz band within the primary 80 MHz band included in the 160 MHz band (or 80+80 MHz band). For example, when applying the fourth perforation pattern, perforation can be applied to at least one 20 MHz channel that does not belong to the primary 40 MHz band, provided that the primary 40 MHz band within the 80 MHz band included in the 160 MHz band (or 80+80 MHz band) is present.

[0130] Information related to the prelead puncture applied to the PPDU can be included in the U-SIG and / or UHR-SIG. For example, the first field of the U-SIG may include information related to continuous bandwidth, and the second field of the U-SIG may include information related to the prelead puncture applied to the PPDU.

[0131] For example, based on the following method, U-SIG and UHR-SIG can include information related to prelead punctures. 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 prelead punctures applied to the first 80 MHz band (i.e., information related to the prelead puncture 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 prelead punctures applied to the second 80 MHz band (i.e., information related to the prelead puncture pattern). Meanwhile, the UHR-SIG consecutive with 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 UHR-SIG consecutive with 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).

[0132] Additionally or alternatively, U-SIG and UHR-SIG may include information related to the preamble puncture, based on the following method: U-SIG may include information related to the preamble puncture for all frequency bands (i.e., information related to the preamble puncture pattern). That is, UHR-SIG may not include information related to the preamble puncture, while only U-SIG may include information related to the preamble puncture (i.e., information related to the preamble puncture pattern).

[0133] U-SIGs can be configured in 20 MHz units. For example, when an 80 MHz PPDU is configured, U-SIGs can be duplicated. That is, four identical U-SIGs can be included in an 80 MHz PPDU. PPDUs with bandwidths exceeding 80 MHz can include different U-SIGs.

[0134] Figure 5 The UHR-SIG can include control information for receiving STAs. The UHR-SIG can be transmitted using at least one symbol, and a symbol can have a length of 4 μs. Information related to the number of symbols used for the UHR-SIG can be included in the U-SIG.

[0135] UHR-SIG provides additional signals to the U-SIG field to enable the STA to interpret / decode the UHR PPDU. The UHR-SIG field may include U-SIG overflow bits that are typically applied to all users. In addition, the UHR-SIG field includes resource allocation information, allowing the STA to locate resources used in fields including the data field / UHR-STF / UHR-LTF (i.e., the UHR modulation field of the UHR PPDU).

[0136] It can be determined based on the RU (Resource Unit) defined by multiple subcarriers / tones. Figure 5 The frequency resources of the UHR-LTF, UHR-STF, and data fields illustrated herein. That is, the UHR-LTF, UHR-STF, and data fields of this disclosure can be transmitted / received through RUs (resource units) defined by multiple subcarriers / tones.

[0137] Figure 6 This is a diagram illustrating the layout of a resource unit (RU) for a 20 MHz PPDU. That is, the UHR-LTF, UHR-STF, and / or data fields included in the 20 MHz PPDU can be... Figure 6 At least one of the various RUs defined in the code is used to send / receive.

[0138] like Figure 6 As illustrated at the top, 26 units (i.e., units corresponding to 26 tones) can be arranged. 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. Furthermore, 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 arranged. Units of 26, 52, and 106 can be allocated to other bands. Individual units can be assigned to receiving STAs (i.e., users).

[0139] at the same time, Figure 6 The RU layout in the diagram can be used not only for multi-user (MU) but also for single-user (SU). In the single-user case, a 242 unit can be used and three DC tones can be inserted, such as... Figure 6 is illustrated in the bottom part of .

[0140] Although Figure 6Various 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). In this specification, an N-RU can be represented as an N-tone RU, etc. For example, a 26-RU can be represented as a 26-tone RU.

[0141] Figure 7 This is a diagram illustrating the layout of a resource unit (RU) for a 40 MHz PPDU.

[0142] With the use of RUs of various sizes Figure 6 Similarly, in Figure 7 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 leftmost guard band of the 40 MHz band; and 11 tones can be used for the rightmost guard band of the 40 MHz band.

[0143] like Figure 7 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 5 Change.

[0144] Figure 8 This diagram illustrates the layout of a resource element (RU) for an 80 MHz PPDU. The layout of the resource element (RU) used in this specification can vary. For example, the layout of the resource element (RU) used in the 80 MHz band can be varied.

[0145] Figure 9 The operation related to the UL-MU is illustrated. As shown, a transmitting STA (e.g., an AP) can perform channel access through contention (i.e., backoff operation) and transmit a trigger frame 930. That is, the transmitting STA (e.g., an AP) can transmit a PPDU 930 including the trigger frame. When the PPDU including the trigger frame is received, a TB (trigger-based) PPDU is transmitted after a delay of SIFS.

[0146] Multiple TB PPDUs 941, 942 can be transmitted simultaneously and can be transmitted from multiple STAs (e.g., user STAs) whose AIDs are indicated in the trigger frame 930. The ACK frame 950 for the TB PPDU can be implemented in various forms.

[0147] Figure 10 An example of using / supporting / defining a channel within the 2.4 GHz band is shown.

[0148] The 2.4 GHz band can also be referred to by other names, such as "first band". Furthermore, the 2.4 GHz band can refer to the frequency range used / supported / defined by channels having a center frequency adjacent to 2.4 GHz (e.g., channels having a center frequency between 2.4 GHz and 2.5 GHz).

[0149] The 2.4 GHz band can include multiple 20 MHz channels. Each 20 MHz channel within the 2.4 GHz band can have multiple channel indices (e.g., indices 1 to 14). For example, the center frequency of channel index 1 for a 20 MHz channel allocation could be 2.412 GHz, the center frequency of channel index 2 for a 20 MHz channel allocation could be 2.417 GHz, and the center frequency of channel index N for a 20 MHz channel allocation could be (2.407 + 0.005 GHz). (N) GHz. The channel index can be referenced by various names such as the channel number. The specific values ​​of the channel index and the center frequency can be changed.

[0150] Figure 10 Four channels within a 2.4 GHz frequency band are illustrated exemplarily. The first frequency region 1010 to the fourth frequency region 1040 shown may each include one channel. For example, the first frequency region 1010 may include channel 1 (the 20 MHz channel with index 1). In this case, the center frequency of channel 1 may be set to 2412 MHz. The second frequency region 1020 may include channel 6. In this case, the center frequency of channel 6 may be set to 2437 MHz. The third frequency region 1030 may include channel 11. In this case, the center frequency of channel 11 may be set to 2462 MHz. The fourth frequency region 1040 may include channel 14. In this case, the center frequency of channel 14 may be set to 2484 MHz.

[0151] Figure 11 An example of using / supporting / defining channels within the 5 GHz band is shown.

[0152] The 5 GHz band can be referred to by other names, such as second band / band, etc. The 5 GHz band can refer to the frequency range that uses / supports / defines channels with a center frequency greater than or equal to 5 GHz and less than 6 GHz (or less than 5.9 GHz). Alternatively, the 5 GHz band can include multiple channels between 4.5 GHz and 5.5 GHz. Figure 11 The specific figures shown may vary.

[0153] 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 the lower UNII. UNII-2 may include frequency ranges referred to as the middle UNII and the extended UNII-2. UNII-3 may be referred to as the upper UNII.

[0154] Within the 5 GHz band, multiple channels can be configured, and the bandwidth of each channel can be configured differently, such as 20 MHz, 40 MHz, 80 MHz, or 160 MHz. For example, the 5170 MHz to 5330 MHz frequency domain / range within UNII-1 and UNII-2 can be divided into eight 20 MHz channels. The 5170 MHz to 5330 MHz frequency domain / range can be divided into four channels using a 40 MHz frequency domain. The 5170 MHz to 5330 MHz frequency domain / range can be divided into two channels using an 80 MHz frequency domain. Alternatively, the 5170 MHz to 5330 MHz frequency domain / range can be divided into one channel using a 160 MHz frequency domain.

[0155] Figure 12 An example of using / supporting / defining a channel within the 6 GHz band is shown.

[0156] The 6 GHz band can be referred to by other names, such as the third band / band. The 6 GHz band can refer to the frequency range that uses, supports, and defines channels with center frequencies higher than 5.9 GHz. Figure 12 The specific values ​​shown may change.

[0157] For example, it can be defined starting from 5.940 GHz. Figure 12 The 20 MHz channel. Specifically, Figure 12 The leftmost channel in the 20 MHz channel array can have an index of 1 (or channel index, channel number, etc.) and be assigned a center frequency of 5.945 GHz. In other words, the center frequency of channel index N can be determined as (5.940 + 0.005 GHz). (N) GHz.

[0158] therefore, Figure 12The index (or channel number) of the 20 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. Furthermore, according to the above (5.940+0.005) N)GHz rules, Figure 12 The index of the 40 MHz channel 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.

[0159] The structure and type / subtype of MAC frames are described below.

[0160] Figure 13 An example of a MAC frame header is shown. As illustrated, a MAC frame may include a 2-octet frame control field / information, a 2-octet duration field / information, a 6-octet receiver address (RA) field / information, and a 6-octet sender address (TA) field / information. Figure 13 As shown, the four fields can be consecutive. They can be modified in various ways. Figure 13 The MAC header, and new fields can be inserted between the four fields shown, or at least one of the fields shown can be omitted.

[0161] Figure 13 The MAC header shown can be placed at the very beginning of the MAC frame. That is, a MAC frame can include, for example... Figure 13 The diagram shows the MAC header and the MAC body fields / information that follow the MAC header. This includes... Figure 13 The MAC frame header is inserted / included in the MAC frame. Figure 5 The data fields of the PPDU shown (e.g., UHR PPDU).

[0162] MAC frames included in the data field of the PPDU of this disclosure can be classified into various types. For example, MAC frames of this disclosure can be classified into control frames, management frames, and data frames.

[0163] For example, management frames include association requests, association responses, reassociation requests, reassociation responses, probe requests, probe responses, beacons, disassociation, authentication, and deauthentication frames / signals defined in a regular WLAN. For management frames, Figure 8 The values ​​of type fields B3 and B2 are set to 00. Additionally, Figure 8 The values ​​of the subtype fields B7, B6, B5, and B4 are as follows: Association Request (0000), Association Response (0001), Re-association Request (0010), Re-association Response (0011), Probe Request (0100), Probe Response (0101), Beacon (1000), Disassociation (1010), Authentication (1011), and Disauthentication (1100).

[0164] For example, control frames include trigger beamforming report polling, NDP announcement (NDPA), control frame extension, control wrapping, block Ack request (BlockAckReq), block Ack (BlockAck), PS-polling, RTS, CTS, Ack, and CF-end frames / signals as defined in traditional WLANs. For control frames, Figure 8 The values ​​of type fields B3 and B2 are set to 01. Furthermore, Figure 8 The values ​​of the subtype fields B7, B6, B5, and B4 are as follows: Trigger (0010), Beamforming Report Poll (0100), NDP Announcement (0101), Control Frame Extension (0110), Control Wrapper (0111), BlockAckReq (1000), BlockAck (1001), PS-Polling (1010), RTS (1011), CTS (1100), Ack (1101), and CF-End (1110).

[0165] For example, data frames include (QoS) data, (QoS) space, etc., as defined in a regular WLAN. For management frames, Figure 13 The values ​​of type fields B3 and B2 are set to 10.

[0166] The MAC frames / signals used in this disclosure can be identified by the aforementioned type field / information and subtype field / information. For example, a "trigger frame" in this disclosure may refer to a MAC frame in which type bits B3 and B2 in the frame control field of the MAC header are set to 01, and subtype bits B7, B6, B5, and B4 in the frame control field are set to 0010. The various MAC frames described in this disclosure are inserted into / included in the data fields of various PPDUs (e.g., HE / VHT / HE / EHT / UHR PPDUs).

[0167] Figure 14Examples of modifications to the transmitting and / or receiving apparatus of this disclosure are shown.

[0168] It is possible Figure 14 Modifications shown Figures 1 to 4 The device shown (e.g., AP STA, non-AP STA). 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.

[0169] Figure 14 The processor 610 can be with Figure 1 The processors 111 and 121 are the same. Alternatively, Figure 14 The processor 610 can be with Figure 1 The processing chips 114 and 124 are the same.

[0170] Figure 14 The memory 150 can be with Figure 1 The memory modules 112 and 122 are identical. Alternatively, Figure 14 The memory 150 can be different Figure 1 Separate external memories for memories 112 and 122.

[0171] Reference Figure 14 The power management module 611 manages the power of 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 keyboard 614 receives input to be used by the processor 610. The keyboard 614 may be displayed on the display 613. The SIM card 615 may be an integrated circuit for securely storing the International Mobile Subscriber Identity (IMSI) and its associated keys, used for identifying and authenticating users in mobile devices such as mobile phones and computers.

[0172] Reference Figure 14 The speaker (640) can output the sound-related results processed by the processor 610. The microphone (641) can receive sound-related inputs to be used by the processor 610.

[0173] 1. Auxiliary channel

[0174] This specification outlines the procedure for secondary channel access, and first defines the primary and secondary channels as follows: The primary channel is the common operating channel for all STAs that are members of the BSS. Based on 20 MHz, 40 MHz, 80 MHz, 160 MHz, 80 MHz+80 MHz or 320 MHz BSS, the primary channel is the primary 20 MHz channel.

[0175] A secondary channel is a channel used to create a channel that is wider than the primary channel and is associated with the primary channel. Based on 40 MHz, 80 MHz, 160 MHz, 80 MHz+80 MHz, or 320 MHz BSS, the secondary channel is a secondary 20 MHz channel. The secondary channel can also be called a non-primary channel or a non-primary channel access (NPCA) primary channel.

[0176] 2. Methods for performing Non-Primary Channel Access (NPCA) or Secondary Channel Access (SCA)

[0177] 2.1 Problems with the Existing Technology

[0178] Currently, in 802.11, channel access is performed based on the primary channel. That is, if the primary channel is idle and the backoff counter (BC) reaches 0, a STA can transmit frames that include the idle secondary channel. For this purpose, all STAs perform CCA (Idle Channel Assessment) on the primary channel in priority. Correspondingly, the AP announces the primary channel of the BSS and always includes it when sending management frames (such as beacon and probe response frames). This mechanism is effective for protection because it performs frame exchange between all STAs and the AP without interference. However, on the other hand, access to the idle secondary channel is impossible if only the primary channel is busy, which reduces the efficiency in terms of medium utilization.

[0179] Figure 15 An example of channel access in an 802.11 wireless LAN system is shown.

[0180] Figure 15 This illustrates channel access based on the primary channel within an 80 MHz bandwidth. For example... Figure 15 As shown, this instruction manual covers the following: P20: Main 20 MHz channel S20: Secondary 20 MHz channel (based on a bandwidth of 40 MHz, it represents the remaining 20 MHz secondary channel in addition to P20) S40: Secondary 40 MHz channel (based on a bandwidth of 80 MHz, it represents the remaining 40 MHz secondary channel besides P20 / S20) S80: Secondary 80 MHz channel (based on a bandwidth of 160 MHz, it represents the remaining 80 MHz secondary channel excluding P20 / S20 / S40) S160: Secondary 160 MHz channel (based on a bandwidth of 320 MHz, it represents the remaining 160 MHz secondary channel excluding P20 / S20 / S40 / S80) S320: Secondary 320 MHz channel (based on a bandwidth of 640 MHz, it represents the remaining 320 MHz secondary channel excluding P20 / S20 / S40 / S80 / S160) Since P20 is busy due to CCA or NAV (Network Allocation Vector), BC is not decremented and waits until P20 becomes idle. Through this backoff process, once BC reaches 0, the channel states (i.e., CCA) of S20 and S40 are checked, and a frame is transmitted. In this example, since S40 is busy, the STA transmits frames corresponding to 40 MHz PPDUs via P20 and S20.

[0181] As mentioned above, Figure 15 As shown, since P20 is busy and S20 and S40 are idle, 60 MHz of bandwidth is wasted, reducing the efficiency of medium utilization. Therefore, this specification proposes a method for accessing the secondary channel when P20 is busy.

[0182] However, as described below Figure 19 In an environment where the BSS operating bandwidth is 160 MHz and the secondary channel used for backoff (referred to as SCA P20 in this specification) is located in S20, the PPDU bandwidth generated is as follows.

[0183] - 20 MHz PPDU (using SCA P20)

[0184] - 80 MHz PPDU (using SCA P80)

[0185] - 160 MHz PPDU (using SCA P160)

[0186] In this case, it can be confirmed that a 40 MHz PPDU cannot be generated for the following reasons. Currently, 802.11be supports preamble puncturing for transmitting PPDUs by puncturing some busy channels to maximize channel utilization. However, puncturing mode is not supported for PPDUs of 80 MHz or less. Based on transmitting a 40 MHz PPDU in secondary channel access, a 40 MHz PPDU is transmitted via SCA P40, but in cases such as... Figure 19 In the SCA P20 channel composition identified as S20, 40 MHz PPDU cannot be transmitted because SCA P40 includes busy P20.

[0187] Considering the various bandwidths of PPDU transmissions achieved by applying the preamble puncturing mode defined in the existing 802.11be to secondary channel access, Figure 19The punching modes applicable to transmitting 80 MHz and 160 MHz PPDUs are as follows.

[0188] - 80 MHz PPDU: [x 1 1 1]

[0189] - 160 MHz PPDU: [x 1 1 1 1 1 1 1]

[0190] Here, x represents a punctured 20 MHz channel, and 1 represents an unpunctured 20 MHz channel. First, since P20 must always be essentially punctured, it can be confirmed that only one puncturing mode is supported, where only P20 is punctured, based on the transmission of 80 MHz and 160 MHz PPDUs. In this case, since even one other 20 MHz channel besides P20 is busy for both 80 MHz and 160 MHz PPDUs, PPDUs cannot be transmitted, resulting in a significant performance degradation in channel utilization.

[0191] This disclosure proposes a constraint rule for determining the SCA P20 (defined as SCA P20 in this specification) that performs backoff, which can generate PPDUs with various bandwidth sizes and can obtain channel utilization benefits by supporting various puncturing modes defined in 802.11be.

[0192] The designations (names) in this specification may be changed, and STAs may include AP STAs or non-AP STAs.

[0193] 2.2 Secondary Channel Access Method

[0194] 2.2.1 STA Capabilities for Secondary Channel Access

[0195] Basically, capabilities for secondary channel access (SCA) can be defined, and the STA and AP inform each other of these capabilities. SCA capabilities can be determined by whether CCA (called preamble detection (PD)) can be performed for the secondary channel (SCH) used to decode frames. That is, NAV can also be set in the SCH accordingly. Initially, CCA can identify Wi-Fi frames performed for the primary channel (PCH).

[0196] - Level 0: No backoff on SCH: CCA is performed against SCH as previously described. That is, it is a method of performing CCA that can detect Wi-Fi signals (called Guard Interval Detection (GID)) and CCA that can detect signals above a certain strength (called Energy Detection (ED)).

[0197] - Level 1: SCH Last Backoff: A method of performing PD only on one secondary channel at a time.

[0198] - Level 2: Simultaneous backoff on SCH: A method of performing PD simultaneously on multiple secondary channels.

[0199] These capabilities can be transmitted by being included in UHR capability IE (information element), beacons from the AP's perspective, probe response frames and (re)association request frames, and probe request frames and (re)association request frames from the non-AP STA's perspective.

[0200] 2.2.2 Basic Process of Secondary Channel Access

[0201] Basically, SCA is best avoided when a basic NAV is set in the PCH for the STA. For example, based on frame exchange with one STA within a TXOP obtained by the AP, other STAs have a basic NAV set in the BSS based on the main channel. In this case, when a STA with a basic NAV set in the BSS accesses the SCH and sends a frame to the AP, the AP cannot receive that frame (e.g., DL data, Ack, etc.) during transmission. Therefore, preferably, the STA performs SCA only when a basic NAV is set in the PCH.

[0202] In other words, STA can perform SCA based on the basic NAV set in PCH.

[0203] Figure 16 An example of the basic procedures for SCA is shown.

[0204] Figure 16 The basic SCA procedure is illustrated. Based on the basic NAV being set when the STA performs backoff in P20, backoff is performed in S20 when the NAV is set. (In S20, a handover delay of PD from P20 to S20 may occur to perform PD.) This indicates that the CCA method can perform CCA aspects in S20, and it can be performed at all levels. The reason for performing backoff in S20 is that if neighboring STAs with the same or similar operating channels as the STA are idle, backoff is not performed, as collisions may occur if they transmit frames simultaneously, potentially wasting channel resources.

[0205] The following considerations should be taken into account when executing SCA.

[0206] i) TXOP Setup Method - End before the basic NAV expires

[0207] Since the basic NAV in P20 has expired, CCA must essentially be performed on P20. Therefore, TXOP is set so that the end time of TXOP in SCH terminates before the basic NAV expires.

[0208] => When TXOP is set to end after the basic NAV expires, a problem arises where conventional STAs may send frames via P20 after the basic NAV set for the STA, causing the STA to be unable to receive frames. Furthermore, when the Target Beacon Transmission Time (TBTT) is set in the middle of the basic NAV, problems may occur because the AP must be prepared to send the beacon immediately after the basic NAV, and non-AP STAs cannot receive the beacon from the AP on time and may have to wait longer than the scheduled time. Therefore, by specifying that TXOP is set to end before the basic NAV expires, normal frame switching can be performed in P20.

[0209] => No frame is sent when there is insufficient time to set the TXOP. That is, no frame is sent when it is difficult to ensure that the TXOP is equal to the time point when the backoff counter (BC) in the SCH is 0 and the time point when the basic NAV in the PCH ends.

[0210] For example, as in Figure 16 In the example, based on the backoff being performed in S20 and the backoff counter reaching 0, TXOP ends earlier than the time point when the basic NAV ends.

[0211] ii) Frame transmission method - the existence of WaitTime

[0212] Previously, based on the backoff counter reaching 0 through backoff in P20, frames could be sent through P20 and one or more idle SCHs depending on the idle / busy state of the SCH. Therefore, for SCA, the existing method needs to be changed to consider the case where P20 is busy, and the backoff operation for this is as follows.

[0213] - A STA can perform backoff in one or more SCHs based on P20 being busy. When switching to S20 due to P20 being busy, backoff can be performed immediately in S20 without a separate WaitTime. Alternatively, when switching to S20, the STA can wait for WaitTime before performing backoff in S20. The reason is as follows: Several blind problems may occur with SCA. Blind problems refer to situations in the channel to which the STA is switching that are not perceived. For example, when a first STA in power-saving mode changes from sleep to wake-up, the first STA will not be aware of this when a second STA (hidden node) sends a frame to a third STA within the first STA's transmission range. Therefore, when the first STA sends a frame, this may affect the third STA. Similarly, the blind problems that may occur with SCA are as follows.

[0214] - Case #1: Based on setting the basic NAV in the PCH and then moving to the SCH to perform channel access.

[0215] - Case #2: Based on performing SCA in SCH, then moving to PCH to perform channel access.

[0216] To address the aforementioned issues, the operation process based on the existence of WaitTime before backoff is as follows.

[0217] First, each WaitTime can be defined. In this specification, it is referred to as SCHWaitTime for case #1 and PCHWaitTime for case #2. The AP can include this information in a management frame that includes beacon and probe responses, or within a UHR operation IE, or in the form of a new IE.

[0218] => Each WaitTime can be indicated as a value with a specific unit (e.g., 32us, 64us).

[0219] => Alternatively or alternatively, WaitTime can vary depending on the SCH that is executed to back off.

[0220] => Alternatively, WaitTime can vary based on the base NAV value set in PCH.

[0221] - WaitTime is terminated based on receiving a frame / PPDU that enables setting the NAV or a frame / PPDU that addresses the STA that starts the timer during each WaitTime operation.

[0222] - If the WaitTime reaches 0 and no backoff is performed during the WaitTime period, the STA can operate to send frames such as RTS or MU-RTS.

[0223] - Alternatively or alternatively, backoff is performed during WaitTime operation, and the STA can send frames such as RTS or MU-RTS.

[0224] => Due to consecutive frame transmission failures, it is necessary to limit the number of transmissions of frames such as RTS frames for protection. Furthermore, consecutive failures increase channel writability (CW), which can reduce transmission opportunities for channel access. Additionally, consecutive unnecessary transmissions lead to channel waste.

[0225] <STA Operation Procedure for SCA #1>

[0226] - Here, STA can be a non-AP STA or AP.

[0227] In this disclosure, even during the time period when NAV is set in the PCH, a STA performing SCA can still transmit frames / PPDUs on the SCH. For example, a STA can transmit frames (or PPDUs) that exclude (or puncture) the PCH on one or more SCHs that are in an idle state, as determined by the result of backoff performed on one or more SCHs and CCA performed on one or more SCHs without backoff.

[0228] Alternatively, the STA can perform backoff in S20 immediately upon switching to S20 without a separate WaitTime.

[0229] Alternatively, the STA can resolve the blind problem by switching to S20 to perform backoff after WaitTime ends (the point at which WaitTime becomes 0) to send frames (such as RTS or MU-RTS).

[0230] => Alternatively or alternatively, the STA performs backoff while WaitTime is in operation and can send frames such as RTS or MU-RTS.

[0231] Alternatively or concurrently, a TXOP that begins with the transmission of a frame or PPDU on the SCH can be set to end before the end time of the NAV on the PCH. The length of the TXOP can be set / indicated by the duration / ID field of the corresponding frame. For example, the value of the duration / ID field can be set to include the time required to exchange frames or PPDUs (including the inter-frame interval (IFS)) after the frame or PPDU.

[0232] Alternatively, the EDCA parameter set for each SCH performing backoff can be set to the EDCA parameter set in the PCH, the MU EDCA parameter set, or a new EDCA parameter set. This EDCA parameter set can be applied to all SCHs in the same or different ways.

[0233] In this disclosure, the STA receiving frames transmitted via the SCA can perform frame detection against the SCH even during the time period during which the NAV is set in the PCH. For example, when there is a frame to be transmitted, the STA can perform backoff against the SCH, and even when there is no frame to be transmitted, the STA can attempt to receive whether a frame addressed to itself exists on the SCA. Furthermore, the STA can set / reset the NAV based on the value of the duration / ID field of the frame detected on the SCH.

[0234] Alternatively, the EDCA parameter set for each SCH performing backoff can be set to the EDCA parameter set in the PCH, the MU EDCA parameter set, or a new EDCA parameter set. This EDCA parameter set can be applied to all SCHs in the same or different ways.

[0235] Figure 17 The basic secondary channel access operation procedure for STA is shown.

[0236] Reference Figure 17 The STA's transmission process is as follows.

[0237] Based on the STA receiving a PPDU including a frame from another BSS, the STA sets the (basic) NAV in the primary channel. The STA performs backoff in one or more 20 MHz secondary channels. Based on the backoff counter reaching 0 in the secondary channel where the STA is performing backoff, the STA performs CCA for the other secondary channels. The STA uses the bandwidth of the secondary channel where backoff was performed and the other secondary channels that are idle as a result of the CCA to transmit the PPDU including the frame.

[0238] Reference Figure 17 The STA receiving process is as follows.

[0239] Based on the STA receiving a PPDU including a frame from another BSS, the (basic) NAV is set in the primary channel. The STA performs backoff in one or more 20 MHz secondary channels. Based on the STA receiving a PPDU including one or more frames during backoff, it determines whether the frame is addressed to the STA (i.e., determines whether the receiver address of the frame is the STA's MAC address). If the frame is addressed to the STA, the STA decodes the frame body. If the frame is not addressed to the STA, the STA sets the NAV using the value of the duration field in the frame's MAC header.

[0240] In addition, the channel composition for secondary channel access must be newly defined, and based on the newly defined channel composition, rules must be defined to utilize secondary channel access, specifying which channels should be used to transmit frames, so as to... Figure 16 As shown, based on S20, the system continues to back off and transmits 20 MHz / 40 MHz / 80 MHz PPDUs.

[0241] 2.2.3 Channel Composition for Secondary Channel Access

[0242] To perform secondary channel access when the basic NAV is set in P20, backoff must be performed in one or more S20s as in P20. As mentioned above, based on the newly defined channel composition in secondary channel access, rules can be defined regarding which channels should be included to transmit frames with various bandwidth sizes when secondary channel backoff is performed. First, the meaning of the 40MHz / 80MHz / 160MHz / 320MHz channel set is as follows: it refers to a set of 40MHz / 80MHz / 160MHz / 320MHz channels consisting of consecutive 20MHz units that do not overlap and are arranged in channelization from the lowest frequency to the highest frequency (e.g., ascending order from a frequency perspective).

[0243] Figure 18 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 320 MHz and SCA P20 is the fifth 20 MHz channel.

[0244] based on Figure 18 The BSS operating bandwidth is 320 MHz⁻¹, and it can be confirmed that there are eight 40 MHz channel sets, four 80 MHz channel sets, two 160 MHz channel sets, and one 320 MHz channel set. For example, the first 80 MHz channel set consists of a first 20 MHz channel, a second 20 MHz channel, a third 20 MHz channel, and a fourth 20 MHz channel. Furthermore, the second 80 MHz channel set consists of a fifth 20 MHz channel, a sixth 20 MHz channel, a seventh 20 MHz channel, and an eighth 20 MHz channel.

[0245] Alternatively, to configure the BSS operating bandwidth to 320 MHz, there are two types of channelization for the 320 MHz channel: 320 MHz-1 and 320 MHz-2. Therefore, 320 MHz-2 channelization has the same characteristics as... Figure 18 The same channel composition as the 320 MHz-1 channelization.

[0246] The channel definition for secondary channel access is as follows.

[0247] SCA P20: Secondary Channel Access to the Primary 20 MHz Channel, which is a reference channel for backoff of secondary channel access based on the application of the basic NAV to P20.

[0248] SCA S20: Secondary Channel Access Secondary 20 MHz Channel (representing the remaining 20 MHz channels other than SCA P20 that are located in the same 40 MHz channel set as SCA P20).

[0249] SCA P40: Secondary channel access to the primary 40 MHz channel (indicating a 40 MHz channel including SCA P20 and SCA S20).

[0250] SCA S40: Secondary Channel Access Secondary 40 MHz Channel (representing the remaining 40 MHz channels other than SCA P40 that are located in the same 80 MHz channel set as SCA P40).

[0251] SCA P80: Secondary channel access to the primary 80 MHz channel (indicating an 80 MHz channel including SCA P40 and SCA S40).

[0252] SCA S80: Secondary Channel Access Secondary 80 MHz Channel (representing the remaining 80 MHz channels other than SCA P80 that are located in the same 160 MHz channel set as SCA P80).

[0253] SCA P160: Secondary channel access to the primary 160 MHz channel (indicating a 160 MHz channel including SCA P80 and SCA S80).

[0254] SCA S160: Secondary Channel Access Secondary 160 MHz Channel (indicates a 160 MHz channel located in a different 160 MHz channel set than SCA P160).

[0255] SCA P320: Secondary channel access to the primary 320 MHz channel (indicating a 320 MHz channel including SCA P160 and SCA S160).

[0256] SCA S320: Secondary Channel Access Secondary 320 MHz Channel (indicates a 320 MHz channel located in a different 320 MHz channel set than SCA P320, based on a BSS operating bandwidth of 640 MHz or higher).

[0257] For example, the channel composition in secondary channel access varies based on the BSS operating bandwidth and the location of SCA P20. In other words, the entire channel can be configured based on the size of the BSS operating bandwidth and whether SCA P20 is the nth 20 MHz channel. An example can be explained below.

[0258] Figure 19 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 160 MHz and SCA P20 is the second 20 MHz channel.

[0259] Figure 19The diagram illustrates the secondary channel access channel composition when the BSS operating bandwidth is 160 MHz and SCA P20 is the second 20 MHz channel. SCA P20 is the second channel arranged in ascending order from lowest to highest frequency (e.g., in ascending order from a frequency perspective, including P20). Figure 19 It can be confirmed that, based on the determination of SCA P20, the corresponding SCA S20, SCA P40, SCA S40, SCA P80, SCA S80 and SCA P160 are determined accordingly.

[0260] Figure 20 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 160 MHz and the SCA P20 is the third 20 MHz channel.

[0261] Figure 20 The diagram illustrates the secondary channel access channel composition when the BSS operating bandwidth is 160 MHz and SCA P20 is the third 20 MHz channel. SCA P20 is the third channel arranged in ascending order from the lowest to the highest frequency (e.g., in ascending order from a frequency perspective, including P20). Figure 20 It can be confirmed that, based on the determination of SCA P20, the corresponding SCA S20, SCA P40, SCA S40, SCA P80, SCA S80 and SCA P160 are determined accordingly.

[0262] Figure 21 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 160 MHz and SCA P20 is the fifth 20 MHz channel.

[0263] Figure 21 The diagram illustrates the secondary channel access configuration when the BSS operating bandwidth is 160 MHz and SCA P20 is the fifth 20 MHz channel. SCA P20 is the fifth channel in ascending order from lowest to highest frequency (e.g., in ascending order from a frequency perspective, including P20). Figure 21 It can be confirmed that, based on the determination of SCA P20, the corresponding SCA S20, SCA P40, SCA S40, SCA P80, SCA S80 and SCA P160 are determined accordingly.

[0264] Figure 22 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 320 MHz and SCA P20 is the second 20 MHz channel.

[0265] Figure 22The diagram illustrates the secondary channel access channel composition when the BSS operating bandwidth is 320 MHz and SCA P20 is the second 20 MHz channel. SCA P20 is the second channel arranged in ascending order from the lowest to the highest frequency (e.g., in ascending order from a frequency perspective, including P20). Figure 22 It can be confirmed that, based on the determination of SCA P20, the corresponding SCA S20, SCA P40, SCA S40, SCA P80, SCA S80, SCA P160, and SCA P320 are also determined. Additionally or alternatively, the 320MHz-1 channelization also has the following characteristics: Figure 22 The same channel composition as the 320 MHz-2 channelization.

[0266] Figure 23 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 320 MHz and the SCA P20 is the third 20 MHz channel.

[0267] Figure 23 The diagram illustrates the secondary channel access channel composition when the BSS operating bandwidth is 320 MHz and SCA P20 is the third 20 MHz channel. SCA P20 is the third channel arranged in ascending order from the lowest to the highest frequency (e.g., in ascending order from a frequency perspective, including P20). Figure 23 It can be confirmed that, based on the determination of SCA P20, the corresponding SCA S20, SCA P40, SCA S40, SCA P80, SCA S80, SCA P160, and SCA P320 are also determined. Additionally or alternatively, the 320MHz-1 channelization also has the following characteristics: Figure 23 The same channel composition as the 320 MHz-2 channelization.

[0268] Figure 24 An example channel configuration for secondary channel access is shown when the BSS operating bandwidth is 320 MHz and SCA P20 is the ninth 20 MHz channel.

[0269] Figure 24 The diagram illustrates the secondary channel access configuration when the BSS operating bandwidth is 320 MHz and SCA P20 is the ninth 20 MHz channel. SCA P20 is the ninth channel in ascending order from lowest to highest frequency (e.g., in ascending frequency order, including P20). Figure 24It can be confirmed that, based on the determination of SCA P20, the corresponding SCA S20, SCA P40, SCA S40, SCA P80, SCA S80, SCA P160, and SCA P320 are also determined. Additionally or alternatively, the 320MHz-1 channelization also has the following characteristics: Figure 24 The same channel composition as the 320 MHz-2 channelization.

[0270] 2.2.4 Wideband Frame Transmission for Secondary Channel Access

[0271] By applying the newly defined secondary channel access channel composition, the rules regarding which channels to include for frame transmission during backoff in SCA P20 can be defined as follows. Alternatively, before transmitting a frame, physical CCA and virtual CCA (NAV setting) are performed in SCA P20 as in the existing P20. If SCA P20 is busy due to CCA or NAV, the STA does not decrease BC and waits until SCA P20 becomes idle. On the other hand, if SCA P20 is idle, BC decreases, and based on a specific time period before BC reaches 0 (e.g., PIFS), a second type of CCA can be performed for other SCHs besides the SCA P20 that is performing backoff to determine whether the channel is idle or busy. Based on this determination, wideband frame transmission in secondary channel access is performed as follows.

[0272] 20 MHz PPDU: Transmit PPDU including SCA P20

[0273] 40 MHz PPDU: Transmits PPDUs including SCA P40

[0274] 80 MHz PPDU: Transmits PPDUs including SCA P80

[0275] 160 MHz PPDU: Transmits PPDUs including SCA P160

[0276] 320 MHz PPDU: Transmits PPDUs including SCA P320

[0277] When transmitting a PPDU, based on the aforementioned CCA results, if puncturing mode is supported for a busy channel, the corresponding channel is transmitted, including signaling indicating that it has been punctured. In the table below, in puncturing mode for PPDUs of 160 MHz or less, 1 indicates that the 20 MHz channel is not punctured, and x indicates that the 20 MHz channel is punctured. On the other hand, in puncturing mode for PPDUs of 320 MHz or less, 1 indicates that the 40 MHz channel is not punctured, and x indicates that the 40 MHz channel is punctured. Each is described in ascending order from lowest to highest frequency.

[0278] [Table 1]

[0279] [Table 2]

[0280] [Table 3]

[0281] [Table 4]

[0282] Figure 25 An example is given of transmitting wideband frames in secondary channel access when the BSS operating bandwidth is 160 MHz and SCA P20 is the second 20 MHz channel.

[0283] Figure 25 It shows that by using the following method Figure 19 This is an example of wideband frame transmission using a channel configuration to perform secondary channel access. Figure 25 The dotted-line rectangle indicates that the PPDU is perforated. Based on P20 busy conditions, the STA or AP transmits frames by performing backoff based on SCA P20. For example... Figure 25As can be confirmed, when transmitting PPDUs of different bandwidth sizes, the channel composition varies based on the position of SCA S20, but PPDUs with various bandwidths can be transmitted according to the previously defined PPDU transmission rules. First, based on the backoff counter value of SCA P20 reaching 0, the channel state (i.e., CCA) for the remaining secondary 20 MHz channel is checked and a frame is transmitted. When transmitting a 20 MHz PPDU, a PPDU containing only SCA P20 is transmitted. Next, when transmitting an 80 MHz PPDU, a PPDU including SCA P80 is transmitted, which is a combination of SCA P40 and SCA S40; based on P20 being included in SCAP80, an 80 MHz PPDU is transmitted, including signaling that P20 has been punctured. When transmitting a 160 MHz PPDU, a PPDU including SCAP160 is transmitted, which is a combination of SCA P80 and SCA S80. At this time, since P20 is busy, a 160 MHz PPDU is sent, including signaling that P20 has been punctured. Thus, when sending 80 MHz or higher PPDUs according to previously defined rules, a PPDU is sent based on P20, including signaling that P20 has been punctured.

[0284] Figure 26 An example is shown of transmitting wideband frames in secondary channel access when the BSS operating bandwidth is 160 MHz and SCA P20 is the third 20 MHz channel.

[0285] Figure 26 It shows that by using the following method Figure 20 This is an example of wideband frame transmission using secondary channel access. First, based on the SCA P20 backoff counter value reaching 0, the channel state (e.g., CCA) for the remaining secondary 20 MHz channel is checked and a frame is transmitted. When transmitting a 20 MHz PPDU, a PPDU consisting only of SCA P20 is transmitted. When transmitting a 40 MHz PPDU, it is transmitted using SCA P40, which is a combination of SCA P20 and SCA S20. Next, when transmitting an 80 MHz / 160 MHz PPDU, a PPDU is transmitted including signaling that P20 has been punctured (because P20 is included in the 80 MHz / 160 MHz PPDU).

[0286] Figure 27 An example is given of transmitting wideband frames in secondary channel access when the BSS operating bandwidth is 160 MHz and SCA P20 is the fifth 20 MHz channel.

[0287] Figure 27 It shows that by using the following method Figure 21 This is an example of wideband frame transmission using secondary channel access. First, based on the SCA P20 backoff counter value reaching 0, the channel state (i.e., CCA) for the remaining secondary 20 MHz channel is checked and a frame is transmitted. It can be confirmed that 20 MHz / 40 MHz / 80 MHz PPDUs are transmitted based on the above rules. When transmitting a 160 MHz PPDU, the PPDU is transmitted, including signaling that P20 has been punctured (because P20 is included in the 160 MHz PPDU).

[0288] For example, this implementation transmits wide-bandwidth frames for idle channels by performing CCA on SCHs other than the SCA P20 that performs backoff, and also transmits busy channels, including signaling that has been punctured.

[0289] 2.2.5 Rules for determining the backoff rules for secondary channel access

[0290] The bandwidth of the PPDU that can be transmitted can vary depending on which channel is determined as SCA P20 during secondary channel access, and whether various puncturing modes defined in 802.11be are supported when transmitting the PPDU can also vary. Therefore, the determination of SCA P20 affects channel utilization. This embodiment proposes a limiting rule for determining SCA P20 that can obtain benefits in terms of channel utilization.

[0291] Case 1) The BSS operating bandwidth is 160 MHz

[0292] Case 1-1) Based on SCA P20 positioning in S20 ( Figure 19 )

[0293] As mentioned above, the bandwidth of the generated PPDU is as follows.

[0294] - 20 MHz PPDU (using SCA P20)

[0295] - 80 MHz PPDU (using SCA P80)

[0296] At this point, one available puncturing pattern exists. (Where x is the punctured 20 MHz CH (channel), and 1 is the unpunctured 20 MHz CH.)

[0297] [x 1 1 1]

[0298] For example, the problem is that an 80 MHz PPDU cannot be generated based on even one of the three remaining 20 MHz channels other than the busy P20.

[0299] - 160 MHz PPDU (using SCA P160)

[0300] At this point, there exists one available perforation pattern as follows. (Where x is a perforated 20 MHz CH, and 1 is an unperforated 20 MHz CH)

[0301] [x 1 1 1 1 1 1 1 1]

[0302] For example, the problem is that an 80 MHz PPDU cannot be generated based on even one of the three remaining 20 MHz channels other than the busy P20.

[0303] Case 1-2) Based on SCA P20 positioning in S40 ( Figure 20 )

[0304] In this case, the generated PPDU bandwidth is as follows.

[0305] - 20 MHz PPDU (using SCA P20)

[0306] - 40 MHz PPDU (using SCA P40)

[0307] Although a 40 MHz PPDU cannot be generated in case 1-1), a 40 MHz PPDU utilizing SCAP40 can be generated in case 1-2).

[0308] - 80 MHz PPDU (using SCA P80)

[0309] At this point, there exists one available perforation pattern as follows. (Where x is a perforated 20 MHz CH, and 1 is an unperforated 20 MHz CH)

[0310] [x 1 1 1]

[0311] For example, the problem is that an 80 MHz PPDU cannot be generated based on even one of the three remaining 20 MHz channels other than the busy P20.

[0312] - 160 MHz PPDU (using SCA P160)

[0313] At this point, there are two available puncturing modes. (Where x is a punctured 20 MHz CH, and 1 is an unpunctured 20 MHz CH)

[0314] [x 1 1 1 1 1 1 1 1]

[0315] [xx 1 1 1 1 1 1]

[0316] For example, compared to case 1-1), when transmitting 160 MHz PPDU, a performance gain in channel utilization can be achieved by supporting more punching modes.

[0317] Cases 1-3) Based on SCA P20 positioning in S80 ( Figure 21 )

[0318] In this case, the generated PPDU bandwidth is as follows.

[0319] - 20 MHz PPDU (using SCA P20)

[0320] - 40 MHz PPDU (using SCA P40)

[0321] Although a 40 MHz PPDU cannot be generated in case 1-1), a 40 MHz PPDU utilizing SCA P40 can be generated in cases 1-2) and 1-3).

[0322] - 80 MHz PPDU (using SCA P80)

[0323] At this point, there are four available puncturing modes. (Where x is a punctured 20 MHz CH, and 1 is an unpunctured 20 MHz CH)

[0324] [1 1 1 1] (No perforation)

[0325] [1 x 1 1]

[0326] [1 1 x 1]

[0327] [1 1 1 x]

[0328] Since SCA P20 exists in S80, P20 is not included when transmitting PPDU, thus supporting more punching modes compared to cases 1-1) and 1-2). Compared to cases 1-1) and 1-2), when transmitting 80 MHz PPDU, performance gains in channel utilization can be achieved by supporting more punching modes.

[0329] - 160 MHz PPDU (using SCA P160)

[0330] At this point, the following perforation patterns are available. (Where x is a perforated 20 MHz CH, and 1 is an unperforated 20 MHz CH)

[0331] [x 1 1 1 1 1 1 1 1]

[0332] [xx 1 1 1 1 1 1]

[0333] For example, compared to case 1-1), when transmitting 160 MHz PPDU, a performance gain in channel utilization can be achieved by supporting more punching modes.

[0334] Based on the analysis of the generated PPDU bandwidth and available perforation modes according to the location of SCA P20 in Case 1, it can be confirmed that the most efficient results in terms of channel utilization can be obtained when the BSS operating bandwidth is 160 MHz and SCA P20 is located in S80.

[0335] Scenario 2) The BSS operating bandwidth is 320 MHz

[0336] Case 2-1) Based on SCA P20 positioning in S20 ( Figure 22 )

[0337] As mentioned above, the bandwidth of the generated PPDU is as follows.

[0338] - 20 MHz PPDU (using SCA P20)

[0339] - 80 MHz PPDU (using SCA P80)

[0340] At this point, there exists one available perforation pattern as follows. (Where x is a perforated 20 MHz CH, and 1 is an unperforated 20 MHz CH)

[0341] [x 1 1 1]

[0342] For example, the problem is that an 80 MHz PPDU cannot be generated based on even one of the three remaining 20 MHz channels other than the busy P20.

[0343] - 160 MHz PPDU (using SCA P160)

[0344] At this point, there exists one available perforation pattern as follows. (Where x is a perforated 20 MHz CH, and 1 is an unperforated 20 MHz CH)

[0345] [x 1 1 1 1 1 1 1 1]

[0346] For example, the problem is that a 160 MHz PPDU cannot be generated based on even one of the seven remaining 20 MHz channels other than the busy P20.

[0347] Case 2-2) Based on SCA P20 positioning in S40 ( Figure 23 )

[0348] In this case, the generated PPDU bandwidth is as follows.

[0349] - 20 MHz PPDU (using SCA P20)

[0350] - 40 MHz PPDU (using SCA P40)

[0351] Although a 40 MHz PPDU cannot be generated in case 1-1), a 40 MHz PPDU utilizing SCAP40 can be generated in case 1-2).

[0352] - 80 MHz PPDU (using SCA P80)

[0353] At this point, there exists one available perforation pattern as follows. (Where x is a perforated 20 MHz CH, and 1 is an unperforated 20 MHz CH)

[0354] [x 1 1 1]

[0355] For example, the problem is that an 80 MHz PPDU cannot be generated based on even one of the three remaining 20 MHz channels other than the busy P20.

[0356] - 160 MHz PPDU (using SCA P160)

[0357] At this point, there are two available puncturing modes. (Where x is a punctured 20 MHz CH, and 1 is an unpunctured 20 MHz CH)

[0358] [x 1 1 1 1 1 1 1 1]

[0359] [xx 1 1 1 1 1 1]

[0360] For example, compared to case 2-1), when transmitting 160 MHz PPDU, a performance gain in channel utilization can be achieved by supporting more punching modes.

[0361] - 320 MHz PPDU (using SCA P320)

[0362] At this point, there are two available puncturing modes. (Where x is a punctured 40 MHz CH, and 1 is an unpunctured 40 MHz CH)

[0363] [x 1 1 1 1 1 1 1 1]

[0364] [x 1 1 1 1 1 xx]

[0365] For example, although a 320 MHz PPDU cannot be generated in case 2-1), a 320 MHz PPDU utilizing the SCA P320 can be generated in case 2-2), thus achieving a performance gain in terms of channel utilization.

[0366] Case 2-3) Based on SCA P20 positioning in S80 ( Figure 18 )

[0367] In this case, the generated PPDU bandwidth is as follows.

[0368] - 20 MHz PPDU (using SCA P20)

[0369] - 40 MHz PPDU (using SCA P40)

[0370] Although a 40 MHz PPDU cannot be generated in case 2-1), a 40 MHz PPDU utilizing SCA P40 can be generated in cases 2-2) and 2-3).

[0371] - 80 MHz PPDU (using SCA P80)

[0372] At this point, there are four available puncturing modes. (Where x is a punctured 20 MHz CH, and 1 is an unpunctured 20 MHz CH)

[0373] [1 1 1 1 ] (No perforation)

[0374] [1 x 1 1]

[0375] [1 1 x 1]

[0376] [1 1 1 x]

[0377] Since SCA P20 exists in S80, P20 is not included when transmitting PPDU, thus supporting more punching modes compared to cases 2-1) and 2-2). For example, compared to cases 2-1) and 2-2), when transmitting 80 MHz PPDU, performance gains in channel utilization can be achieved by supporting more punching modes.

[0378] - 160 MHz PPDU (using SCA P160)

[0379] At this point, there are two available puncturing modes. (Where x is a punctured 20 MHz CH, and 1 is an unpunctured 20 MHz CH)

[0380] [x 1 1 1 1 1 1 1 1]

[0381] [xx 1 1 1 1 1 1]

[0382] For example, compared to case 2-1), when transmitting 160 MHz PPDU, a performance gain in channel utilization can be achieved by supporting more punching modes.

[0383] - 320 MHz PPDU (using SCA P320)

[0384] At this point, there are eight available puncturing patterns. (Where x is a punctured 40 MHz CH, and 1 is an unpunctured 40 MHz CH)

[0385] [x 1 1 1 1 1 1 1 1]

[0386] [x 1 1 1 1 1 xx]

[0387] [xx 1 1 1 1 1 1]

[0388] [xx 1 x 1 1 1 1]

[0389] [xx 1 1 x 1 1 1]

[0390] [xx 1 1 1 x 1 1]

[0391] [xx 1 1 1 1 x 1]

[0392] [xx 1 1 1 1 1 x]

[0393] For example, although a 320 MHz PPDU cannot be generated in case 2-1), a 320 MHz PPDU utilizing the SCA P320 can be generated in cases 2-2) and 2-3). Furthermore, compared to case 2-2), a performance gain in channel utilization can be achieved in case 2-3) by supporting more perforation modes when transmitting a 320 MHz PPDU.

[0394] Case 2-4) Based on SCA P20 positioning in S160 ( Figure 24 )

[0395] In this case, the generated PPDU bandwidth is as follows.

[0396] - 20 MHz PPDU (using SCA P20)

[0397] -40 MHz PPDU (using SCA P40)

[0398] Although a 40 MHz PPDU cannot be generated in case 2-1), a 40 MHz PPDU utilizing SCA P40 can be generated in cases 2-2), 2-3), and 2-4).

[0399] - 80 MHz PPDU (using SCA P80)

[0400] At this point, there are four available puncturing modes. (Where x is a punctured 20 MHz CH, and 1 is an unpunctured 20 MHz CH)

[0401] [1 1 1 1] (No perforation)

[0402] [1 x 1 1]

[0403] [1 1 x 1]

[0404] [1 1 1 x]

[0405] Since SCA P20 exists in S80, P20 is not included when transmitting PPDU, thus supporting more punching modes compared to cases 2-1) and 2-2). For example, compared to cases 2-1) and 2-2), when transmitting 80 MHz PPDU, performance gains in channel utilization can be achieved by supporting more punching modes.

[0406] - 160 MHz PPDU (using SCA P160)

[0407] At this point, there are seven available puncturing patterns. (Where x is a punctured 20 MHz CH, and 1 is an unpunctured 20 MHz CH)

[0408] [1 1 1 1 1 1 1 1 1] (No perforation)

[0409] [1 x 1 1 1 1 1 1 1]

[0410] [1 1 x 1 1 1 1 1]

[0411] [1 1 1 x 1 1 1 1]

[0412] [1 1 1 1 x 1 1 1]

[0413] [1 1 1 1 1 x 1 1]

[0414] [1 1 1 1 1 1 x 1]

[0415] [1 1 1 1 1 1 1 1 x]

[0416] For example, compared to cases 2-1), 2-2), and 2-3), when transmitting 160 MHz PPDUs, performance gains in channel utilization can be achieved by supporting more perforation modes.

[0417] - 320 MHz PPDU (using SCA P320)

[0418] At this point, there are eight available puncturing patterns. (Where x is a punctured 20 MHz CH, and 1 is an unpunctured 20 MHz CH)

[0419] [x 1 1 1 1 1 1 1 1]

[0420] [x 1 1 1 1 1 xx]

[0421] [xx 1 1 1 1 1 1]

[0422] [xx 1 x 1 1 1 1]

[0423] [xx 1 1 1 x 1 1]

[0424] [xx 1 1 1 1 x 1]

[0425] [xx 1 1 1 1 1 x]

[0426] [xxx 1 1 1 1 1]

[0427] For example, although a 320 MHz PPDU cannot be generated in case 2-1), a 320 MHz PPDU utilizing the SCA P320 can be generated in cases 2-2), 2-3), and 2-4). Furthermore, compared to cases 2-1) and 2-2), performance gains in channel utilization can be achieved in cases 2-3) and 2-4) by supporting more perforation modes when transmitting a 320 MHz PPDU.

[0428] Based on the analysis of the generated PPDU bandwidth and available perforation modes according to the location of SCA P20 in Case 2, it can be confirmed that the most efficient results in terms of channel utilization can be obtained when the BSS operating bandwidth is 320 MHz and SCA P20 is located in S160.

[0429] Figure 28 An example of a channel configuration for secondary channel access is shown, based on a BSS operating bandwidth of 80 MHz and SCA P20 being a second 20 MHz channel.

[0430] Figure 29 An example of a channel configuration for secondary channel access is shown, based on a BSS operating bandwidth of 80 MHz and SCA P20 being a third 20 MHz channel.

[0431] Case 3) The BSS operating bandwidth is 80 MHz

[0432] Case 1-1) Based on SCA P20 positioning in S20 ( Figure 28 )

[0433] As mentioned above, the bandwidth of the generated PPDU is as follows.

[0434] - 20 MHz PPDU (using SCA P20)

[0435] - 80 MHz PPDU (using SCA P80)

[0436] At this point, there exists one available perforation pattern as follows. (Where x is a perforated 20 MHz CH, and 1 is an unperforated 20 MHz CH)

[0437] [x 1 1 1]

[0438] For example, the problem is that an 80 MHz PPDU cannot be generated based on even one of the three remaining 20 MHz channels other than the busy P20.

[0439] Case 1-2) Based on SCA P20 positioning in S40 ( Figure 29 )

[0440] In this case, the generated PPDU bandwidth is as follows.

[0441] - 20 MHz PPDU (using SCA P20)

[0442] - 40 MHz PPDU (using SCA P40)

[0443] Although a 40 MHz PPDU cannot be generated in case 1-1), a 40 MHz PPDU utilizing SCAP40 can be generated in case 1-2).

[0444] - 80 MHz PPDU (using SCA P80)

[0445] At this point, there exists one available perforation pattern as follows. (Where x is a perforated 20 MHz CH, and 1 is an unperforated 20 MHz CH)

[0446] [x 1 1 1]

[0447] For example, the problem is that an 80 MHz PPDU cannot be generated based on even one of the three remaining 20 MHz channels other than the busy P20.

[0448] Based on the analysis of the generated PPDU bandwidth and available perforation modes according to the location of SCA P20 in Case 3, it can be confirmed that based on the BSS operating bandwidth of 80 MHz, the most efficient results in terms of channel utilization can be obtained when SCA P20 is located in S40.

[0449] For example, through the analysis of cases 1), 2), and 3) above, it can be confirmed that, in terms of channel utilization, when determining the SCA P20 within the BSS operating bandwidth, i) determining the SCA P20 within a secondary 40 MHz based on a BSS operating bandwidth of 80 MHz, ii) determining the SCA P20 within a secondary 80 MHz based on a BSS operating bandwidth of 160 MHz, and iii) determining the SCA P20 within a secondary 160 MHz based on a BSS operating bandwidth of 320 MHz are optimal. In summary, the limiting rule can be expressed as the SCA P20 being positioned in a secondary channel corresponding to half the size of the BSS operating bandwidth.

[0450] Given that the BSS operating bandwidth is 640 MHz, the limiting rules used to determine the SCA P20 were also applied, thus allowing us to determine the PPDU bandwidth and whether it supports various punch-hole modes.

[0451] <STA Operation Procedure for SCA #2>

[0452] - STA can be a non-AP STA or AP.

[0453] In this disclosure, even during the time period when the Network Assignment Vector (NAV) is set in the primary channel (PCH), a STA performing secondary channel access (SCA) can still transmit frames / PPDUs on the secondary channel (SCH). For example, the STA can transmit frames or PPDUs that exclude (or puncture) the PCH on one or more idle SCHs determined by the results of backoff performed for one or more SCHs and idle channel assessment (CCA) for one or more SCHs without backoff.

[0454] Alternatively, the STA can perform backoff in S20 immediately after switching to S20 without a separate WaitTime.

[0455] Alternatively, to address the blind problem after switching to S20, the STA can perform backoff to send frames (such as Request to Send (RTS) or Multi-User RTS (MU-RTS)) after WaitTime ends (the time when WaitTime becomes 0).

[0456] => Alternatively or alternatively, the STA performs backoff while WaitTime is in operation and sends frames such as RTS or MU-RTS.

[0457] Alternatively or concurrently, the transmission opportunity (TXOP) that begins with the transmission of a frame or PPDU on the SCH can be set to end before the expiration time of the NAV on the PCH. The length of the TXOP can be set / indicated by the duration / ID field of the corresponding frame. For example, the value of the duration / ID field can be set to include the time required to exchange frames or PPDUs (including the inter-frame interval (IFS)) after the corresponding frame or PPDU.

[0458] Alternatively, the EDCA parameter set for each SCH performing backoff can be set to the EDCA parameter set in the PCH, the MU EDCA parameter set, or a new EDCA parameter set. This EDCA parameter set can be applied to all SCHs in the same or different ways.

[0459] Another location or alternative location, such as Figure 25 As shown, based on the CCA result, the remaining SCHs except SCA P20 are determined to be busy, and the STA sends frames / PPDUs via SCA P20.

[0460] Alternatively or alternatively, based on such Figure 25 As shown, SCA S80 and P20 are busy. The STA sends frames / PPDUs via SCA P80, including signaling that P20 is punched.

[0461] Alternatively or alternatively, based on such Figure 25 As shown, only P20 is busy, and the STA sends frames / PPDUs via SCA P160, including signaling that P20 is punched.

[0462] Alternatively, based on the condition that S20 is busy and backoff is to be performed in order to perform SCA, and based on the BSS operating bandwidth of 80 MHz, the STA can determine in S40 to perform S20 (SCA P20) to perform backoff.

[0463] Alternatively, based on the S20 condition where backoff is to be performed in order to perform SCA, and based on the BSS operating bandwidth of 160 MHz, the STA can determine the S20 (SCA P20) to be performed in S80.

[0464] Alternatively, based on the condition that S20 is busy and backoff is to be performed in order to perform SCA, and based on the BSS operating bandwidth of 320 MHz, the STA can determine in S160 to perform S20 (SCA P20) to perform backoff.

[0465] In this disclosure, the STA receiving frames transmitted via the SCA can perform frame detection against the SCH even during the time period during which the NAV is set in the PCH. For example, when there is a frame to be transmitted, the STA can perform backoff against the SCH, and even when there is no frame to be transmitted, the STA can attempt to receive frames addressed to itself on the SCA. Furthermore, the STA can perform NAV setting / resetting based on the value of the duration / ID field of the frame detected on the SCH.

[0466] Alternatively, the EDCA parameter set for each SCH performing backoff can be set to the EDCA parameter set in the PCH, the MU EDCA parameter set, or a new EDCA parameter set. This EDCA parameter set can be applied to all SCHs in the same or different ways.

[0467] The PPDU that transmits / receives the signals described in this specification may include data fields.

[0468] Data fields include user data and may include higher-level groupings. For example, it may include MPDUs (MAC frames).

[0469] For example, based on channel access operations supporting secondary channels, the duration / ID field in the MAC header included in the MPDU can be set to a value that includes the duration of frame exchange after the frame sent during exclusion (or puncturing) of the PCH or after the PPDU. For example, the TXOP end time determined based on the value of the duration / ID field can be set before the end time of the NAV set on the primary channel.

[0470] In addition, such as Figure 1 As shown, the transmitting device and the receiving device may each include a memory, a processor, and a transceiver.

[0471] The memory can store information about the multiple secondary channel accesses described in this specification.

[0472] The processor can perform backoff in the secondary channel, generate various RUs, and configure PPDUs based on information stored in memory. The processor can be configured to execute all or part of the <STA Operation Procedure #1 for SCA> and <STA Operation Procedure #2 for SCA> described in this specification.

[0473] Specifically, the transceiver 113 of the transmitting device includes an antenna and can perform analog signal processing. Specifically, the processor 111 can control the transceiver 113 to transmit PPDUs generated by the processor 111.

[0474] Alternatively, processor 111 may generate a transmission PPDU and store information about the transmission PPDU in memory 112.

[0475] For example, the processor 111 of the transmitting device can be configured to perform operations according to the examples of the present disclosure for transmitting a STA. For example, the processor 111 can be configured to transmit a frame on the SCH via transceiver 113 during the time period when the NAV is set in the PCH. For example, the processor 111 can be configured to perform backoff for the SCH via transceiver 113 and identify one or more idle SCHs. For example, the processor 111 can be configured to transmit frames / PPDUs of excluded / perforated PCHs via transceiver 113 on one or more PUSCHs. Additionally or alternatively, the processor 111 can be configured to generate a frame including a duration / ID field, which is set to a value such that the TXOP that begins with the transmission of a frame / PPDU on the SCH ends before the time point when the NAV on the PCH expires.

[0476] Furthermore, the transceiver 123 of the receiving device can receive PPDUs based on the control of the processor 121. For example, the transceiver 123 may include multiple detailed units (not shown). For example, the transceiver 123 includes at least one receiving antenna and may include filters for the corresponding receiving antenna.

[0477] The PPDU received by transceiver 123 can be stored in memory 122. Processor 121 can process the decoding of the PPDU received through memory 122. Processor 121 can obtain control information (e.g., SIG) regarding the BW / tone plan / RU included in the PPDU and store the obtained control information in memory 122.

[0478] Processor 121 can perform decoding on the received PPDU. Furthermore, processor 121 can process the decoded data. For example, processor 121 can perform processing operations to deliver information about the decoded data fields to a higher layer (e.g., the MAC layer). Additionally, subsequent operations can be performed based on the generation of an indication signal from the higher layer to the PHY layer in response to the data delivered to the higher layer.

[0479] For example, the processor parses the MACPDU obtained by PHY decoding the data field of the PPDU received by the transceiver.

[0480] For example, the processor 121 of the receiving device can be configured to perform operations according to the examples of the present disclosure for receiving a STA. For example, the processor 121 can attempt frame detection on the SCH via transceiver 123 during the time period when the NAV is set on the PCH. The processor 121 can be configured to decode / parse frames addressed to itself based on frames received on the SCH. Furthermore, the processor 121 can be configured to set / reset the NAV based on the duration / ID field value of frames not addressed to itself.

[0481] Figure 30 This is a flowchart illustrating the operation of the transmitting device according to this embodiment.

[0482] Figure 30 Examples can be performed by the transmitting device (AP and / or non-AP STA).

[0483] Figure 30 Some steps in each step of the example (or detailed sub-steps described later) can be skipped / omitted.

[0484] Through step S3010, the transmitting device (transmitting STA) can obtain information about the tone plan described above. As mentioned above, the information about the tone plan includes the size and location of the RU, control information related to the RU, information about the frequency band including the RU, and information about the STA receiving the RU, etc.

[0485] In step S3020, the transmitting device can construct / generate a PPDU based on the acquired control information. Configuring / generating a PPDU may include configuring / generating each field of the PPDU. Specifically, step S3020 includes configuring the EHT-SIG field, which includes control information regarding tone planning. In other words, step S3020 includes configuring fields including control information (e.g., an N-bitmap) indicating the size / location of the RU; and / or configuring fields including the identifier (e.g., AID) of the STA receiving the RU.

[0486] In addition, step S3020 may include generating an STF / LTF sequence to be transmitted via a specific RU. The STF / LTF sequence may be generated based on a preset STF generation sequence / LTF generation sequence.

[0487] In addition, step S3020 may include generating a data field (i.e., MPDU) sent through a specific RU.

[0488] The transmitting device can send the PPDU constructed in step S3020 to the receiving device based on step S3030.

[0489] When performing step S3030, the transmitting device may perform at least one of the following operations: such as CSD, spatial mapping, IDFT / IFFT operation and GI insertion.

[0490] It is possible to Figure 5 Send signals / fields / sequences constructed according to this specification in the form of [the specified format].

[0491] Figure 31 This is a flowchart illustrating the operation of the receiving device / apparatus according to this embodiment.

[0492] According to Figure 31 The example is used to receive the above PPDU.

[0493] Figure 31 Examples can be performed by the receiving device / app (AP and / or non-AP STA).

[0494] Figure 31 Some steps in each step of the example (or detailed sub-steps described later) can be skipped / omitted.

[0495] The receiving device (receiving STA) can receive all or part of the PPDU through step S3110. The received signal can be used... Figure 5 In the form of.

[0496] The sub-steps of step S3110 can be based on Figure 30 Step S3030 is determined. That is, in step S3110, the operation of restoring the results of the CSD, spatial mapping, IDFT / IFFT operation and GI insertion operation applied in step S3030 can be performed.

[0497] In step S3120, the receiving device can perform decoding on all or part of the PPDU. Furthermore, the receiving device can obtain control information related to the tone plan (i.e., RU) from the decoded PPDU.

[0498] More specifically, the receiving device can decode the L-SIG and EHT-SIG of the PPDU based on conventional STF / LTF and obtain the information included in the L-SIG and EHT SIG fields. The information about various tone schemes (i.e., RUs) described in this specification can be included in the EHT-SIG, and the receiving STA can obtain information about tone schemes (i.e., RUs) through the EHT-SIG.

[0499] In step S3130, the receiving device can decode the remainder of the PPDU based on information about the tone plan (i.e., RU) obtained in step S3120. For example, the receiving STA can decode the STF / LTF field of the PPDU based on information about a plan (i.e., RU). Additionally, the receiving STA can decode the data field of the PPDU based on information about the tone plan (i.e., RU) and obtain the MPDU included in the data field.

[0500] Additionally, the receiving device can perform a processing operation to transmit the data decoded in step S3130 to a higher layer (e.g., the MAC layer). Furthermore, when a signal indicating the transmission from the upper layer to the PHY layer is generated in response to the data sent to the upper layer, subsequent operations can be performed.

[0501] In the following text, reference will be made to Figures 1 to 31 The above-described implementation method is described.

[0502] Figure 32 This is a flowchart illustrating the process of transmitting a STA accessing a non-master channel and receiving a PPDU according to this embodiment.

[0503] It can be executed in network environments that support next-generation wireless LAN systems (Ultra-Reliable (UHR) wireless LAN systems or next-generation Wi-Fi). Figure 32 Example. Next-generation wireless LAN systems are an improved version of the 802.11be system and meet backward compatibility requirements with the 802.11be system.

[0504] Figure 32 The example is performed by the sending station (STA), and the sending STA can correspond to an access point (AP). Figure 32 The receiving STA in the STA can correspond to at least one station (STA).

[0505] This embodiment proposes a method for transmitting and receiving Physical Layer Protocol Data Units (PPDUs) by performing backoff for a non-primary channel and, based on this, performing channel access for another non-primary channel. Specifically, this embodiment proposes constrained rules for determining the location of non-primary channels within the Basic Service Set (BSS) operational channels of an Access Point (AP).

[0506] In step S3210, the transmitting station (STA) performs backoff for the first non-master channel.

[0507] In step S3220, based on the backoff value of 0 for the first non-primary channel, the STA is sent to perform channel access for the second non-primary channel.

[0508] In step S3230, the transmitting STA receives the PPDU from the receiving STA through an idle channel among the first non-master channel and the second non-master channel.

[0509] The first non-primary channel is a secondary 20 MHz channel that can perform backoff when a network allocation vector (NAV) is set in the primary 20 MHz channel.

[0510] The second non-primary channel is the remaining secondary channel in the Basic Service Set (BSS) operation channel, excluding the first non-primary channel.

[0511] The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

[0512] For example, this embodiment proposes a method for performing channel access on a non-primary channel (or secondary channel) when a NAV (here, basic NAV) is set in the primary 20 MHz channel. Specifically, this embodiment has the following effects: by proposing a constrained rule for determining the location of the non-primary channel within the BSS operation channel of the AP, the channel utilization in terms of PPDU perforation mode and bandwidth is maximized. In addition, based on the fact that this embodiment determines the non-primary channel considering the overlap of OBSS services and non-primary channels, it can have an advantage in terms of the probability of performing channel access on the non-primary channel, and can also have the effect of improving the efficiency of broadband utilization.

[0513] The specific implementation of the bandwidth of the PPDU and the available perforation modes based on the first non-primary channel being located in a secondary channel with half the size of the BSS operating channel is as follows.

[0514] The BSS operating channel size is 160 MHz. The second non-primary channel can include a non-primary channel access (NPCA) 20 MHz channel, an NPCA 40 MHz channel, and an NPCA 80 MHz channel. The non-primary channel and NPCA channel can also be referred to as secondary channel access (SCA) channel.

[0515] The NPCA 20 MHz channel can be a 40 MHz channel configured together with a first non-primary channel to transmit PPDUs. The NPCA 40 MHz channel can be an 80 MHz channel configured together with a 40 MHz channel to transmit PPDUs. The NPCA 80 MHz channel can be a 160 MHz channel configured together with an 80 MHz channel to transmit PPDUs. The 40 MHz channel can be designated as the SCA P40 (primary 40 MHz) channel. The 80 MHz channel can be designated as the SCAP80 channel. The 160 MHz channel can be designated as the SCA P160 channel. The 320 MHz channel, which will be described later, can be designated as the SCA P320 channel.

[0516] The first non-primary channel can be located in an 80 MHz channel. For example, based on the first non-primary channel being located in a secondary channel (80 MHz) that is half the size of the BSS operating channel (160 MHz), the optimized bandwidth and puncturing mode of the PPDU can be implemented as follows, thereby improving channel utilization.

[0517] PPDUs can be transmitted via the first non-primary channel if only the first non-primary channel is idle. PPDUs can be transmitted via the 40 MHz channel if both the first non-primary channel and the NPCA 20 MHz channel are idle.

[0518] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted via the 80 MHz channel. At this time, based on the primary 20 MHz channel positioning within the NPCA 80 MHz channel, the 80 MHz channel can be un-punctured. However, based on the primary 20 MHz channel positioning within the 80 MHz channel, the 20 MHz channel within the 80 MHz channel that contains the primary 20 MHz channel can be punctured.

[0519] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs can be transmitted through the 160 MHz channel. At this time, the 20 MHz channel or the 40 MHz channel within the 160 MHz channel that is located as the primary 20 MHz channel can be punctured.

[0520] In addition, based on the BSS operating channel size of 320 MHz, the second non-primary channel may include NPCA 20 MHz channel, NPCA 40 MHz channel, NPCA 80 MHz channel and NPCA 160 MHz channel.

[0521] The NPCA 20 MHz channel can be a 40 MHz channel configured together with the first non-primary channel to transmit PPDUs. The NPCA 40 MHz channel can be an 80 MHz channel configured together with the 40 MHz channel to transmit PPDUs. The NPCA 80 MHz channel can be a 160 MHz channel configured together with the 80 MHz channel to transmit PPDUs. The NPCA 160 MHz channel can be a 320 MHz channel configured together with the 160 MHz channel to transmit PPDUs.

[0522] The first non-primary channel can be located in a 160 MHz channel. For example, based on the first non-primary channel being located in a secondary channel (160 MHz) that is half the size of the BSS operating channel (320 MHz), the optimized bandwidth and puncturing mode of the PPDU can be implemented as follows, thereby improving channel utilization.

[0523] Since only the first non-master channel is idle, PPDUs can be sent through the first non-master channel.

[0524] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel.

[0525] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted via the 80 MHz channel. At this time, based on the primary 20 MHz channel positioning within the NPCA 80 MHz channel, the 80 MHz channel can be un-punctured. However, based on the primary 20 MHz channel positioning within the 80 MHz channel, the 20 MHz channel within the 80 MHz channel that contains the primary 20 MHz channel can be punctured.

[0526] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs can be transmitted via the 160 MHz channel. In this case, if the primary 20 MHz channel is positioned within the NPCA 160 MHz channel, the 160 MHz channel can be un-punctured. However, if the primary 20 MHz channel is positioned within the 160 MHz channel, the 20 MHz channel within the 160 MHz channel that contains the primary 20 MHz channel can be punctured.

[0527] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, PPDUs can be transmitted through the 320 MHz channel. At this time, at least one of the first 40 MHz channel, the second 40 MHz channel, and the third 40 MHz channel within the 320 MHz channel can be punctured. The first 40 MHz channel can be a 40 MHz channel with a primary 20 MHz channel. The second 40 MHz channel can be a 40 MHz channel consecutive to the first 40 MHz channel. The third 40 MHz channel can be any of the remaining 40 MHz channels in the 320 MHz channel, excluding the first and second 40 MHz channels.

[0528] Furthermore, based on the BSS operating channel size of 80 MHz, the second non-primary channel may include the NPCA 20 MHz channel and the NPCA 40 MHz channel.

[0529] The NPCA 20 MHz channel can be a 40 MHz channel configured together with the first non-primary channel to transmit PPDUs. The NPCA 40 MHz channel can be an 80 MHz channel configured together with the 40 MHz channel to transmit PPDUs.

[0530] The first non-primary channel can be located in a 40 MHz channel. For example, based on the first non-primary channel being located in a secondary channel (40 MHz) that is half the size of the BSS operating channel (80 MHz), the optimized bandwidth and puncturing mode of the PPDU can be implemented as follows, thereby improving channel utilization.

[0531] PPDUs can be transmitted via the first non-primary channel if only the first non-primary channel is idle. PPDUs can be transmitted via the 40 MHz channel if both the first non-primary channel and the NPCA 20 MHz channel are idle.

[0532] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted through the 80 MHz channel. At this time, the 20 MHz channel within the 80 MHz channel that is located as the primary 20 MHz channel can be punctured.

[0533] The configuration of the first and second non-primary channels is determined based on the size of the BSS operating channel and the position of the first non-primary channel.

[0534] New channel configurations can be defined to access non-primary channels (or secondary channels), and rules can be defined regarding which channels will be included in the non-primary channels (or secondary channels) for transmitting and receiving PPDUs with various bandwidth sizes. For example, this implementation has the following effect: backoff can be performed based on non-primary channels by defining the configuration of the channels to be used for non-primary channel access, and PPDUs can be transmitted and received in a wider bandwidth by performing CCA on other non-primary channels based on this.

[0535] The specific implementation method for determining the configuration (or arrangement) of the first and second non-primary channels is as follows.

[0536] Since the size of the BSS operating channel is 160 MHz, the BSS operating channel may include a first 20 MHz channel to an eighth 20 MHz channel, and it can be assumed that the first 20 MHz channel to the eighth 20 MHz channel are arranged in order from the lowest frequency to the highest frequency.

[0537] As an example, the first non-primary channel can be located in the 20 MHz channel with the second lowest frequency (the second 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the 20 MHz channel with the lowest frequency (the first 20 MHz channel) within the BSS operating channels.

[0538] At this point, since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the second 20 MHz channel.

[0539] Since the first non-primary channel and the NPCA 40 MHz channel are idle, PPDUs are transmitted via an 80 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 80 MHz channel. For example, PPDUs can be transmitted via a second 20 MHz channel other than the first 20 MHz channel to a fourth 20 MHz channel within the 80 MHz channel.

[0540] Since the first non-primary channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channels in the 160 MHz channel, excluding the first 20 MHz channel.

[0541] As another example, the first non-primary channel can be located in the third lowest frequency 20 MHz channel (the third 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the lowest frequency 20 MHz channel (the first 20 MHz channel) within the BSS operating channels.

[0542] At this point, since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the third 20 MHz channel.

[0543] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel. For example, PPDUs can be transmitted using the third and fourth 20 MHz channels.

[0544] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs are transmitted through the 80 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 80 MHz channel. For example, PPDUs can be transmitted through a second 20 MHz channel other than the first 20 MHz channel to a fourth 20 MHz channel within the 80 MHz channel.

[0545] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channel in addition to the first 20 MHz channel within the 160 MHz channel.

[0546] As another example, the first non-primary channel can be located in the fifth lowest frequency 20 MHz channel (the fifth 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the first 20 MHz channel (the lowest frequency) within the BSS operating channels.

[0547] Since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the fifth 20 MHz channel.

[0548] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel. For example, PPDUs can be transmitted using the fifth and sixth 20 MHz channels.

[0549] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted via the 80 MHz channel. For example, PPDUs can be transmitted using channels from the fifth 20 MHz channel to the eighth 20 MHz channel.

[0550] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channel in addition to the first 20 MHz channel within the 160 MHz channel.

[0551] Furthermore, based on the fact that the size of the BSS operating channel is 320 MHz, it can be assumed that the BSS operating channel includes a first 20 MHz channel to a sixteenth 20 MHz channel, and that the first 20 MHz channel to the sixteenth 20 MHz channel are arranged in order from low frequency to high frequency.

[0552] As an example, the first non-primary channel can be located in the 20 MHz channel with the second lowest frequency (the second 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the 20 MHz channel with the lowest frequency (the first 20 MHz channel) within the BSS operating channels.

[0553] At this point, since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the second 20 MHz channel.

[0554] Since the first non-primary channel and the NPCA 40 MHz channel are idle, PPDUs are transmitted via an 80 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 80 MHz channel. For example, PPDUs can be transmitted via a second 20 MHz channel other than the first 20 MHz channel to a fourth 20 MHz channel within the 80 MHz channel.

[0555] Since the first non-primary channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channels in the 160 MHz channel, excluding the first 20 MHz channel.

[0556] Since the first non-primary channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, PPDUs are transmitted through the 320 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 320 MHz channel. For example, PPDUs can be transmitted through the second 20 MHz channel to the sixteenth 20 MHz channel in addition to the first 20 MHz channel within the 320 MHz channel.

[0557] As another example, the first non-primary channel can be located in the third lowest frequency 20 MHz channel (the third 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the lowest frequency 20 MHz channel (the first 20 MHz channel) within the BSS operating channels.

[0558] Since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the third 20 MHz channel.

[0559] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel. For example, PPDUs can be transmitted using the third and fourth 20 MHz channels.

[0560] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs are transmitted through the 80 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 80 MHz channel. For example, PPDUs can be transmitted through a second 20 MHz channel other than the first 20 MHz channel to a fourth 20 MHz channel within the 80 MHz channel.

[0561] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channel in addition to the first 20 MHz channel within the 160 MHz channel.

[0562] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, PPDUs are transmitted through the 320 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 320 MHz channel. For example, PPDUs can be transmitted through the second 20 MHz channel to the sixteenth 20 MHz channel in addition to the first 20 MHz channel within the 320 MHz channel.

[0563] As another example, the first non-primary channel can be located in the 20 MHz channel with the ninth lowest frequency (the ninth 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the 20 MHz channel with the lowest frequency (the first 20 MHz channel) within the BSS operating channels.

[0564] Since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the ninth 20 MHz channel.

[0565] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel. For example, PPDUs can be transmitted using the ninth and tenth 20 MHz channels.

[0566] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted via the 80 MHz channel. For example, PPDUs can be transmitted using the ninth to twelfth 20 MHz channels.

[0567] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs can be transmitted via the 160 MHz channel. For example, PPDUs can be transmitted using channels from the ninth 20 MHz channel to the sixteenth 20 MHz channel.

[0568] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, PPDUs are transmitted through the 320 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 320 MHz channel. For example, PPDUs can be transmitted through the second 20 MHz channel to the sixteenth 20 MHz channel in addition to the first 20 MHz channel within the 320 MHz channel.

[0569] According to the above embodiments, based on the different arrangements of the first non-primary channel and the second non-primary channel, the method proposed in this embodiment has the following effects: the channels used for transmitting and receiving PPDUs can be varied, and the channel utilization rate for wide bandwidth can be adjusted.

[0570] Figure 33 This is a flowchart illustrating the process of receiving a STA accessing a non-master channel and transmitting a PPDU according to this embodiment.

[0571] It can be executed in network environments that support next-generation wireless LAN systems (Ultra-Reliable (UHR) wireless LAN systems or next-generation Wi-Fi). Figure 33 Example. Next-generation wireless LAN systems are an improved version of the 802.11be system and meet backward compatibility requirements with the 802.11be system.

[0572] Figure 33 The example is performed by the receiving station (STA), and the receiving STA can correspond to at least one STA. Figure 33 The sending STA in the diagram can correspond to an access point (AP).

[0573] This embodiment proposes a method for transmitting and receiving Physical Layer Protocol Data Units (PPDUs) by performing backoff for a non-primary channel and, based on this, performing channel access for another non-primary channel. Specifically, this embodiment proposes constrained rules for determining the location of non-primary channels within the Basic Service Set (BSS) operational channels of an Access Point (AP).

[0574] In step S3310, the receiving station (STA) performs backoff for the first non-primary channel.

[0575] In step S3320, based on the backoff value of 0 for the first non-primary channel, the receiving STA performs channel access for the second non-primary channel.

[0576] In step S3330, the receiving STA sends a PPDU to the transmitting STA through an idle channel between the first non-master channel and the second non-master channel.

[0577] The first non-primary channel is a secondary 20 MHz channel that can perform backoff when a network allocation vector (NAV) is set in the primary 20 MHz channel.

[0578] The second non-primary channel is the remaining secondary channel in the Basic Service Set (BSS) operation channel, excluding the first non-primary channel.

[0579] The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

[0580] For example, this embodiment proposes a method for performing channel access on a non-primary channel (or secondary channel) when a NAV (here, basic NAV) is set in the primary 20 MHz channel. Specifically, this embodiment has the following effects: by proposing a constrained rule for determining the location of the non-primary channel within the BSS operation channel of the AP, the channel utilization in terms of PPDU perforation mode and bandwidth is maximized. In addition, based on the fact that this embodiment determines the non-primary channel considering the overlap of OBSS services and non-primary channels, it can have an advantage in terms of the probability of performing channel access on the non-primary channel, and can also have the effect of improving the efficiency of broadband utilization.

[0581] The specific implementation of the bandwidth of the PPDU and the available perforation modes based on the first non-primary channel being located in a secondary channel with half the size of the BSS operating channel is as follows.

[0582] The BSS operating channel size is 160 MHz. The second non-primary channel can include a non-primary channel access (NPCA) 20 MHz channel, an NPCA 40 MHz channel, and an NPCA 80 MHz channel. The non-primary channel and NPCA channel can also be referred to as secondary channel access (SCA) channel.

[0583] The NPCA 20 MHz channel can be a 40 MHz channel configured together with a first non-primary channel to transmit PPDUs. The NPCA 40 MHz channel can be an 80 MHz channel configured together with a 40 MHz channel to transmit PPDUs. The NPCA 80 MHz channel can be a 160 MHz channel configured together with an 80 MHz channel to transmit PPDUs. The 40 MHz channel can be designated as the SCA P40 (primary 40 MHz) channel. The 80 MHz channel can be designated as the SCAP80 channel. The 160 MHz channel can be designated as the SCA P160 channel. The 320 MHz channel, which will be described later, can be designated as the SCA P320 channel.

[0584] The first non-primary channel can be located in an 80 MHz channel. For example, based on the first non-primary channel being located in a secondary channel (80 MHz) that is half the size of the BSS operating channel (160 MHz), the optimized bandwidth and puncturing mode of the PPDU can be implemented as follows, thereby improving channel utilization.

[0585] PPDUs can be transmitted via the first non-primary channel if only the first non-primary channel is idle. PPDUs can be transmitted via the 40 MHz channel if both the first non-primary channel and the NPCA 20 MHz channel are idle.

[0586] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted via the 80 MHz channel. At this time, based on the primary 20 MHz channel positioning within the NPCA 80 MHz channel, the 80 MHz channel can be un-punctured. However, based on the primary 20 MHz channel positioning within the 80 MHz channel, the 20 MHz channel within the 80 MHz channel that contains the primary 20 MHz channel can be punctured.

[0587] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs can be transmitted through the 160 MHz channel. At this time, the 20 MHz channel or the 40 MHz channel within the 160 MHz channel that is located as the primary 20 MHz channel can be punctured.

[0588] In addition, based on the BSS operating channel size of 320 MHz, the second non-primary channel may include NPCA 20 MHz channel, NPCA 40 MHz channel, NPCA 80 MHz channel and NPCA 160 MHz channel.

[0589] The NPCA 20 MHz channel can be a 40 MHz channel configured together with the first non-primary channel to transmit PPDUs. The NPCA 40 MHz channel can be an 80 MHz channel configured together with the 40 MHz channel to transmit PPDUs. The NPCA 80 MHz channel can be a 160 MHz channel configured together with the 80 MHz channel to transmit PPDUs. The NPCA 160 MHz channel can be a 320 MHz channel configured together with the 160 MHz channel to transmit PPDUs.

[0590] The first non-primary channel can be located in a 160 MHz channel. For example, based on the first non-primary channel being located in a secondary channel (160 MHz) that is half the size of the BSS operating channel (320 MHz), the optimized bandwidth and puncturing mode of the PPDU can be implemented as follows, thereby improving channel utilization.

[0591] Since only the first non-master channel is idle, PPDUs can be sent through the first non-master channel.

[0592] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel.

[0593] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted via the 80 MHz channel. At this time, based on the primary 20 MHz channel positioning within the NPCA 80 MHz channel, the 80 MHz channel can be un-punctured. However, based on the primary 20 MHz channel positioning within the 80 MHz channel, the 20 MHz channel within the 80 MHz channel that contains the primary 20 MHz channel can be punctured.

[0594] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs can be transmitted via the 160 MHz channel. In this case, if the primary 20 MHz channel is positioned within the NPCA 160 MHz channel, the 160 MHz channel can be un-punctured. However, if the primary 20 MHz channel is positioned within the 160 MHz channel, the 20 MHz channel within the 160 MHz channel that contains the primary 20 MHz channel can be punctured.

[0595] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, PPDUs can be transmitted through the 320 MHz channel. At this time, at least one of the first 40 MHz channel, the second 40 MHz channel, and the third 40 MHz channel within the 320 MHz channel can be punctured. The first 40 MHz channel can be a 40 MHz channel with a primary 20 MHz channel. The second 40 MHz channel can be a 40 MHz channel consecutive to the first 40 MHz channel. The third 40 MHz channel can be any of the remaining 40 MHz channels in the 320 MHz channel, excluding the first and second 40 MHz channels.

[0596] Furthermore, based on the BSS operating channel size of 80 MHz, the second non-primary channel may include the NPCA 20 MHz channel and the NPCA 40 MHz channel.

[0597] The NPCA 20 MHz channel can be a 40 MHz channel configured together with the first non-primary channel to transmit PPDUs. The NPCA 40 MHz channel can be an 80 MHz channel configured together with the 40 MHz channel to transmit PPDUs.

[0598] The first non-primary channel can be located in a 40 MHz channel. For example, based on the first non-primary channel being located in a secondary channel (40 MHz) that is half the size of the BSS operating channel (80 MHz), the optimized bandwidth and puncturing mode of the PPDU can be implemented as follows, thereby improving channel utilization.

[0599] PPDUs can be transmitted via the first non-primary channel if only the first non-primary channel is idle. PPDUs can be transmitted via the 40 MHz channel if both the first non-primary channel and the NPCA 20 MHz channel are idle.

[0600] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted through the 80 MHz channel. At this time, the 20 MHz channel within the 80 MHz channel that is located as the primary 20 MHz channel can be punctured.

[0601] The configuration of the first and second non-primary channels is determined based on the size of the BSS operating channel and the position of the first non-primary channel.

[0602] New channel configurations can be defined to access non-primary channels (or secondary channels), and rules can be defined regarding which channels will be included in the non-primary channels (or secondary channels) for transmitting and receiving PPDUs with various bandwidth sizes. For example, this implementation has the following effect: backoff can be performed based on non-primary channels by defining the configuration of the channels to be used for non-primary channel access, and PPDUs can be transmitted and received in a wider bandwidth by performing CCA on other non-primary channels based on this.

[0603] The specific implementation method for determining the configuration (or arrangement) of the first and second non-primary channels is as follows.

[0604] Since the size of the BSS operating channel is 160 MHz, the BSS operating channel may include a first 20 MHz channel to an eighth 20 MHz channel, and it can be assumed that the first 20 MHz channel to the eighth 20 MHz channel are arranged in order from the lowest frequency to the highest frequency.

[0605] As an example, the first non-primary channel can be located in the 20 MHz channel with the second lowest frequency (the second 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the 20 MHz channel with the lowest frequency (the first 20 MHz channel) within the BSS operating channels.

[0606] At this point, since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the second 20 MHz channel.

[0607] Since the first non-primary channel and the NPCA 40 MHz channel are idle, PPDUs are transmitted via an 80 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 80 MHz channel. For example, PPDUs can be transmitted via a second 20 MHz channel other than the first 20 MHz channel to a fourth 20 MHz channel within the 80 MHz channel.

[0608] Since the first non-primary channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channels in the 160 MHz channel, excluding the first 20 MHz channel.

[0609] As another example, the first non-primary channel can be located in the third lowest frequency 20 MHz channel (the third 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the lowest frequency 20 MHz channel (the first 20 MHz channel) within the BSS operating channels.

[0610] At this point, since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the third 20 MHz channel.

[0611] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel. For example, PPDUs can be transmitted using the third and fourth 20 MHz channels.

[0612] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs are transmitted through the 80 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 80 MHz channel. For example, PPDUs can be transmitted through a second 20 MHz channel other than the first 20 MHz channel to a fourth 20 MHz channel within the 80 MHz channel.

[0613] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channel in addition to the first 20 MHz channel within the 160 MHz channel.

[0614] As another example, the first non-primary channel can be located in the fifth lowest frequency 20 MHz channel (the fifth 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the first 20 MHz channel (the lowest frequency) within the BSS operating channels.

[0615] Since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the fifth 20 MHz channel.

[0616] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel. For example, PPDUs can be transmitted using the fifth and sixth 20 MHz channels.

[0617] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted via the 80 MHz channel. For example, PPDUs can be transmitted using channels from the fifth 20 MHz channel to the eighth 20 MHz channel.

[0618] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channel in addition to the first 20 MHz channel within the 160 MHz channel.

[0619] Furthermore, based on the fact that the size of the BSS operating channel is 320 MHz, it can be assumed that the BSS operating channel includes a first 20 MHz channel to a sixteenth 20 MHz channel, and that the first 20 MHz channel to the sixteenth 20 MHz channel are arranged in order from low frequency to high frequency.

[0620] As an example, the first non-primary channel can be located in the 20 MHz channel with the second lowest frequency (the second 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the 20 MHz channel with the lowest frequency (the first 20 MHz channel) within the BSS operating channels.

[0621] At this point, since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the second 20 MHz channel.

[0622] Since the first non-primary channel and the NPCA 40 MHz channel are idle, PPDUs are transmitted via an 80 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 80 MHz channel. For example, PPDUs can be transmitted via a second 20 MHz channel other than the first 20 MHz channel to a fourth 20 MHz channel within the 80 MHz channel.

[0623] Since the first non-primary channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channels in the 160 MHz channel, excluding the first 20 MHz channel.

[0624] Since the first non-primary channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, PPDUs are transmitted through the 320 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 320 MHz channel. For example, PPDUs can be transmitted through the second 20 MHz channel to the sixteenth 20 MHz channel in addition to the first 20 MHz channel within the 320 MHz channel.

[0625] As another example, the first non-primary channel can be located in the third lowest frequency 20 MHz channel (the third 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the lowest frequency 20 MHz channel (the first 20 MHz channel) within the BSS operating channels.

[0626] Since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the third 20 MHz channel.

[0627] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel. For example, PPDUs can be transmitted using the third and fourth 20 MHz channels.

[0628] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs are transmitted through the 80 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 80 MHz channel. For example, PPDUs can be transmitted through a second 20 MHz channel other than the first 20 MHz channel to a fourth 20 MHz channel within the 80 MHz channel.

[0629] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs are transmitted through the 160 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 160 MHz channel. For example, PPDUs can be transmitted through the second to the eighth 20 MHz channel in addition to the first 20 MHz channel within the 160 MHz channel.

[0630] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, PPDUs are transmitted through the 320 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 320 MHz channel. For example, PPDUs can be transmitted through the second 20 MHz channel to the sixteenth 20 MHz channel in addition to the first 20 MHz channel within the 320 MHz channel.

[0631] As another example, the first non-primary channel can be located in the 20 MHz channel with the ninth lowest frequency (the ninth 20 MHz channel) within the BSS operating channels. The primary 20 MHz channel can be located in the 20 MHz channel with the lowest frequency (the first 20 MHz channel) within the BSS operating channels.

[0632] Since only the first non-primary channel is idle, PPDUs can be transmitted through the first non-primary channel. For example, PPDUs can be transmitted using only the ninth 20 MHz channel.

[0633] Since the first non-primary channel and the NPCA 20 MHz channel are idle, PPDUs can be transmitted via the 40 MHz channel. For example, PPDUs can be transmitted using the ninth and tenth 20 MHz channels.

[0634] Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, PPDUs can be transmitted via the 80 MHz channel. For example, PPDUs can be transmitted using the ninth to twelfth 20 MHz channels.

[0635] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, PPDUs can be transmitted via the 160 MHz channel. For example, PPDUs can be transmitted using channels from the ninth 20 MHz channel to the sixteenth 20 MHz channel.

[0636] Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, PPDUs are transmitted through the 320 MHz channel, and the PPDUs may include information about the puncturing of the primary 20 MHz channel included in the 320 MHz channel. For example, PPDUs can be transmitted through the second 20 MHz channel to the sixteenth 20 MHz channel in addition to the first 20 MHz channel within the 320 MHz channel.

[0637] According to the above embodiments, based on the different arrangements of the first non-primary channel and the second non-primary channel, the method proposed in this embodiment has the following effects: the channels used for transmitting and receiving PPDUs can be varied, and the channel utilization rate for wide bandwidth can be adjusted.

[0638] <Device Configuration>

[0639] The technical features described above in this specification can be applied to various devices and methods. For example, they can be used... Figure 1 and / or Figure 14 The apparatus is used to perform / support the above-described technical features of this specification. For example, the above-described technical features of this specification may be applied only to... Figure 1 and / or Figure 14 Part of it. For example, the aforementioned technical features of this specification can be based on Figure 1 The processing chips (114 and 124) are implemented based on Figure 1 Implemented using processors (111 and 121) and memory (112 and 122), or based on Figure 14 The processor (610) and memory (620) are implemented. For example, the apparatus of this specification performs backoff for a first non-primary channel; performs channel access for a second non-primary channel based on a backoff value of 0 for the first non-primary channel; and transmits physical layer protocol data units (PPDUs) to a transmitting station (STA) through an idle channel of the first non-primary channel and the second non-primary channel.

[0640] The technical features of this specification can be implemented based on a computer-readable medium (CRM). For example, the CRM proposed in this specification is at least one computer-readable medium (CRM) comprising instructions executed by at least one processor.

[0641] The CRM can store instructions for performing operations including: performing backoff from the transmitting station (STA) for a first non-primary channel; performing channel access for a second non-primary channel based on a backoff value of 0 for the first non-primary channel; and transmitting a PPDU to the transmitting STA via an idle channel among the first and second non-primary channels. The instructions stored in the CRM of this specification can be executed by at least one processor. The at least one processor associated with the CRM of this specification may be... Figure 1 The processors (111 and 121) or processing chips (114 and 124), or Figure 14 The processor (610). Furthermore, the CRM in this manual can be... Figure 1 The memory (112 and 122), Figure 14 The memory (620) or a separate external memory / storage medium / disk, etc.

[0642] The aforementioned technical features in this specification are applicable to various applications or business models. For example, the aforementioned technical features can be applied to wireless communication in devices that support artificial intelligence (AI).

[0643] Artificial intelligence (AI) refers to the field of research concerning artificial intelligence or the methods used to create it, while machine learning refers to the field of research concerning methods for defining and solving various problems within the field of AI. Machine learning is also defined as an algorithm that improves operational performance through stable operational experience.

[0644] Artificial neural networks (ANNs) are models used in machine learning, and can refer to models that solve problems in general, including artificial neurons (nodes) that form a network by combining synapses. An artificial neural network can be defined by the connection patterns between neurons in different layers, the learning process that updates model parameters, and the activation function that generates the output value.

[0645] 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 can output the function value of an activation function of the input signal input through synapses, weights, and biases.

[0646] 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 that are set before learning in a machine learning algorithm, and include the learning rate, number of iterations, minimum batch size, and initialization function.

[0647] Learning artificial neural networks may aim to determine model parameters used to minimize a loss function. The loss function can be used as a metric for determining the optimal model parameters during the learning process of an artificial neural network.

[0648] Machine learning can be divided into supervised learning, unsupervised learning, and reinforcement learning.

[0649] Supervised learning refers to the method of training an artificial neural network using labels provided for the training data. When the training data is input into the artificial neural network, the labels indicate the correct answer (or result value) that the network should infer. Unsupervised learning refers to the method of training an artificial neural network without providing labels for the training data. Reinforcement learning can be a training method used to train an agent defined in an environment to select actions or sequences of actions to maximize the cumulative reward in each state.

[0650] Machine learning implemented using deep neural networks (DNNs) with multiple hidden layers 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.

[0651] The aforementioned technical features can be applied to wireless communication for robots.

[0652] A robot can be defined as a machine that automatically processes or operates a given task using its own capabilities. In particular, a robot that has the ability to recognize its environment and make autonomous judgments to perform operations can be called an intelligent robot.

[0653] Depending on their application or field, robots can be categorized into industrial, medical, household, and military robots, among others. Robots can include actuators or drives that include motors to perform various physical operations, such as moving robot joints. Additionally, mobile robots can include wheels, brakes, propellers, etc., in their drives to move on the ground or fly in the air.

[0654] The aforementioned technical features can be applied to devices that support extended reality.

[0655] Extended reality is collectively referred to as virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology is a computer graphics technology that 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.

[0656] MR technology is similar to AR technology in that it can display real and virtual objects together. However, in AR technology, virtual objects are used as a supplement to real objects, while in MR technology, virtual and real objects are used as equals.

[0657] XR technology can be applied to head-mounted displays (HMDs), head-up displays (HUDs), mobile phones, tablets, laptops, desktop computers, televisions, digital signage, and more. Devices that utilize XR technology can be referred to as XR devices.

[0658] The claims disclosed in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented as a device, and the technical features in the device claims of this specification can be combined to be implemented by a method. Furthermore, the technical features in the method claims and device claims of this specification can be combined to be implemented as a device, and the technical features in the method claims and device claims of this specification can be combined to be implemented by a method.

Claims

1. A method in a wireless local area network (WLAN) system, the method comprising the following steps: The receiving station (STA) performs backoff for the first non-primary channel; Based on the backoff value of 0 for the first non-primary channel, the receiving STA performs channel access for the second non-primary channel; as well as The receiving STA transmits a Physical Layer Protocol Data Unit (PPDU) to the transmitting STA through an idle channel among the first and second non-primary channels. Wherein, the first non-primary channel is a secondary 20 MHz channel that can perform the backoff when the network allocation vector (NAV) is set in the primary 20 MHz channel. Wherein, the second non-primary channel is the remaining secondary channel in the Basic Service Set (BSS) operation channel, excluding the first non-primary channel, and The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

2. The method according to claim 1, wherein, The size of the BSS operation channel is 160 MHz. The second non-primary channel includes non-primary channel access to the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel. The NPCA 20 MHz channel is a channel used in conjunction with the first non-primary channel to configure a 40 MHz channel capable of transmitting the PPDU. The NPCA 40 MHz channel is a channel configured together with the 40 MHz channel to transmit the PPDU, and The NPCA 80 MHz channel is a channel used in conjunction with the 80 MHz channel to configure a 160 MHz channel capable of transmitting the PPDU.

3. The method according to claim 2, wherein, The first non-primary channel is located within the 80 MHz channel. Specifically, since only the first non-primary channel is idle, the PPDU is transmitted through the first non-primary channel. Since the first non-primary channel and the NPCA 20 MHz channel are idle, the PPDU is transmitted through the 40 MHz channel. Wherein, since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, the PPDU is transmitted through the 80 MHz channel, and During this period, since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, the PPDU is transmitted through the 160 MHz channel.

4. The method according to claim 3, wherein, Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, Since the primary 20 MHz channel is located within the NPCA 80 MHz channel, and the 80 MHz channel is not punctured, and Since the main 20 MHz channel is located within the 80 MHz channel, the 20 MHz channel within the 80 MHz channel containing the main 20 MHz channel is punctured.

5. The method according to claim 3, wherein, Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, The 160 MHz channel is located in a 20 MHz channel or a 40 MHz channel of the main 20 MHz channel that has been punctured.

6. The method according to claim 1, wherein, The size of the BSS operation channel is 320 MHz. The second non-primary channel includes the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel. The NPCA 20 MHz channel is a channel used in conjunction with the first non-primary channel to configure a 40 MHz channel capable of transmitting the PPDU. The NPCA 40 MHz channel is a channel used in conjunction with the 40 MHz channel to configure an 80 MHz channel capable of transmitting the PPDU. The NPCA 80 MHz channel is a channel configured together with the 80 MHz channel to transmit the PPDU, and The NPCA 160 MHz channel is a channel used in conjunction with the 160 MHz channel to configure a 320 MHz channel capable of transmitting the PPDU.

7. The method according to claim 6, wherein, The first non-primary channel is located within the 160 MHz channel. Specifically, since only the first non-primary channel is idle, the PPDU is transmitted through the first non-primary channel. Since the first non-primary channel and the NPCA 20 MHz channel are idle, the PPDU is transmitted through the 40 MHz channel. During this process, since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, the PPDU is transmitted through the 80 MHz channel. Wherein, since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, the PPDU is transmitted through the 160 MHz channel, and Among them, since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel and the NPCA 160 MHz channel are idle, the PPDU is transmitted through the 320 MHz channel.

8. The method according to claim 7, wherein, Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, Since the primary 20 MHz channel is located within the NPCA 80 MHz channel, and the 80 MHz channel is not punctured, and Since the main 20 MHz channel is located within the 80 MHz channel, the 20 MHz channel within the 80 MHz channel containing the main 20 MHz channel is punctured.

9. The method according to claim 7, wherein, Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, Since the primary 20 MHz channel is located within the NPCA 160 MHz channel, and the 160 MHz channel is not punctured, and Since the main 20 MHz channel is located within the 160 MHz channel, the 20 MHz channel within the 160 MHz channel containing the main 20 MHz channel is punctured.

10. The method according to claim 7, wherein, Since the first non-master channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel are idle, at least one of the first 40 MHz channel, the second 40 MHz channel, and the third 40 MHz channel in the 320 MHz channel is punctured. Wherein, the first 40 MHz channel is a 40 MHz channel that is located within the main 20 MHz channel. Wherein, the second 40 MHz channel is a 40 MHz channel that is continuous with the first 40 MHz channel, and The third 40 MHz channel is the remaining 40 MHz channel in the 320 MHz channel, excluding the first 40 MHz channel and the second 40 MHz channel.

11. A receiving station (STA) in a wireless local area network (WLAN) system, the receiving STA comprising: Memory; transceiver; as well as A processor, operatively connected to the memory and the transceiver, The processor is configured as follows: Perform backoff for the first non-master channel; Based on a backoff value of 0 for the first non-primary channel, channel access is performed for the second non-primary channel; and Physical layer protocol data unit (PPDU) is transmitted to the transmitting STA via an idle channel among the first and second non-master channels. Wherein, the first non-primary channel is a secondary 20 MHz channel that can perform the backoff when the network allocation vector (NAV) is set in the primary 20 MHz channel. Wherein, the second non-primary channel is the remaining secondary channel in the Basic Service Set (BSS) operation channel, excluding the first non-primary channel, and The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

12. A method in a wireless local area network (WLAN) system, the method comprising the following steps: The backoff is performed by the transmitting station (STA) for the first non-master channel; Based on the backoff value of 0 for the first non-primary channel, the transmitting STA performs channel access for the second non-primary channel; as well as The transmitting STA receives Physical Layer Protocol Data Units (PPDUs) from the receiving STA via an idle channel among the first and second non-primary channels. Wherein, the first non-primary channel is a secondary 20 MHz channel that can perform the backoff when the network allocation vector (NAV) is set in the primary 20 MHz channel. Wherein, the second non-primary channel is the remaining secondary channel in the Basic Service Set (BSS) operation channel, excluding the first non-primary channel, and The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

13. The method according to claim 12, wherein, The size of the BSS operation channel is 160 MHz. The second non-primary channel includes non-primary channel access to the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel. The NPCA 20 MHz channel is a channel used in conjunction with the first non-primary channel to configure a 40 MHz channel capable of transmitting the PPDU. The NPCA 40 MHz channel is a channel configured together with the 40 MHz channel to transmit the PPDU, and The NPCA 80 MHz channel is a channel used in conjunction with the 80 MHz channel to configure a 160 MHz channel capable of transmitting the PPDU.

14. The method according to claim 13, wherein, The first non-primary channel is located within the 80 MHz channel. Specifically, since only the first non-primary channel is idle, the PPDU is transmitted through the first non-primary channel. Since the first non-primary channel and the NPCA 20 MHz channel are idle, the PPDU is transmitted through the 40 MHz channel. Wherein, since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, the PPDU is transmitted through the 80 MHz channel, and During this period, since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, the PPDU is transmitted through the 160 MHz channel.

15. The method according to claim 14, wherein, Since the first non-primary channel, the NPCA 20 MHz channel, and the NPCA 40 MHz channel are idle, Since the primary 20 MHz channel is located within the NPCA 80 MHz channel, and the 80 MHz channel is not punctured, and Since the main 20 MHz channel is located within the 80 MHz channel, the 20 MHz channel within the 80 MHz channel containing the main 20 MHz channel is punctured.

16. The method of claim 14, wherein, Since the first non-primary channel, the NPCA 20 MHz channel, the NPCA 40 MHz channel, and the NPCA 80 MHz channel are idle, The 160 MHz channel is located in a 20 MHz channel or a 40 MHz channel of the main 20 MHz channel that has been punctured.

17. The method according to claim 12, wherein, The size of the BSS operation channel is 320 MHz. The second non-primary channel includes the NPCA 20 MHz channel, the NPCA 40 MHz channel, the NPCA 80 MHz channel, and the NPCA 160 MHz channel. The NPCA 20 MHz channel is a channel used in conjunction with the first non-primary channel to configure a 40 MHz channel capable of transmitting the PPDU. The NPCA 40 MHz channel is a channel used in conjunction with the 40 MHz channel to configure an 80 MHz channel capable of transmitting the PPDU. The NPCA 80 MHz channel is a channel configured together with the 80 MHz channel to transmit the PPDU, and The NPCA 160 MHz channel is a channel used in conjunction with the 160 MHz channel to configure a 320 MHz channel capable of transmitting the PPDU.

18. A transmitting station (STA) in a wireless local area network (WLAN) system, the transmitting STA comprising: Memory; transceiver; as well as A processor, operatively connected to the memory and the transceiver, The processor is configured as follows: Perform backoff for the first non-master channel; Based on a backoff value of 0 for the first non-primary channel, channel access is performed for the second non-primary channel; and Physical layer protocol data unit (PPDU) is received from the receiving STA via an idle channel among the first and second non-primary channels. Wherein, the first non-primary channel is a secondary 20 MHz channel that can perform the backoff when the network allocation vector (NAV) is set in the primary 20 MHz channel. Wherein, the second non-primary channel is the remaining secondary channel in the Basic Service Set (BSS) operation channel, excluding the first non-primary channel, and The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

19. A computer-readable medium comprising instructions executable by at least one processor and performing a method comprising the following steps: Perform backoff for the first non-master channel; Based on the backoff value of 0 for the first non-master channel, channel access is performed for the second non-master channel; as well as Physical layer protocol data unit (PPDU) is transmitted to the transmitting station STA via an idle channel among the first and second non-primary channels. Wherein, the first non-primary channel is a secondary 20 MHz channel that can perform the backoff when the network allocation vector (NAV) is set in the primary 20 MHz channel. Wherein, the second non-primary channel is the remaining secondary channel in the Basic Service Set (BSS) operation channel, excluding the first non-primary channel, and The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

20. An apparatus in a wireless local area network (WLAN) system, the apparatus comprising: Memory; as well as A processor, operatively connected to the memory, The processor is configured as follows: Perform backoff for the first non-master channel; Based on a backoff value of 0 for the first non-primary channel, channel access is performed for the second non-primary channel; and Physical layer protocol data unit (PPDU) is transmitted to the transmitting station STA via an idle channel among the first and second non-primary channels. Wherein, the first non-primary channel is a secondary 20 MHz channel that can perform the backoff when the network allocation vector (NAV) is set in the primary 20 MHz channel. Wherein, the second non-primary channel is the remaining secondary channel in the Basic Service Set (BSS) operation channel, excluding the first non-primary channel, and The first non-primary channel is located in a secondary channel that is half the size of the BSS operating channel.

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