Triggered frame transmission in a wireless communication system

Abstract

In a wireless local area network system, a STA can receive a trigger frame from an AP. The trigger frame can include a common information field and user information fields. Each user information field can include a first field related to an association identifier (AID) and a second field including information of a STA related to the AID. Based on the first field having a specific value, the second field can include special information for each STA receiving the trigger frame. The common information field can include a presence field related to whether there is a user information field in which the first field has the specific value among the user information fields.

Description

Technical Field

[0001] This specification relates to a method for transmitting trigger frames in a wireless local area network (WLAN) system, and more specifically, to operations based on trigger frames and information included in the trigger frames. Background Technology

[0002] Wireless local area networks (WLANs) have been enhanced in various ways. For example, the IEEE 802.11ax standard proposes enhanced communication environments using orthogonal frequency division multiple access (OFDMA) and downlink multiple user multiple input multiple output (DLMU MIMO) schemes.

[0003] This specification outlines technical features that can be used in new communication standards. For example, a new communication standard could be the currently discussed Extremely High Throughput (EHT) standard. The EHT standard could utilize newly proposed increased bandwidth, enhanced PHY layer Protocol Data Unit (PPDU) structures, enhanced sequences, Hybrid Automatic Repeat Request (HARQ) schemes, etc. The EHT standard could be referred to as the IEEE 802.11be standard. Summary of the Invention

[0004] Technical solution

[0005] In a wireless local area network (WLAN) system according to various embodiments, a station (STA) may receive a trigger frame from an access point (AP). The trigger frame may include a public information field and a user information field. The user information field may include a first field related to an association identifier (AID) and a second field including information about the STA associated with the AID. Based on a specific value in the first field, the second field may include specific information for all STAs receiving the trigger frame. The public information field may include an presence field related to whether a user information field with a specific value exists in the first field of the user information field.

[0006] Beneficial effects

[0007] According to the examples in this specification, the amount of information included in the trigger frame can be increased while directly using the existing trigger frame format. Since information related to the 11be feature is included in the user field corresponding to the specific AID, backward compatibility is not an issue; advantageously, forward compatibility is ensured. That is, it can be used in the next generation of standards because the AID associated with the specific information needs to be reset in future standards. Attached Figure Description

[0008] Figure 1 Examples of transmitting and / or receiving devices are shown in this specification.

[0009] Figure 2This is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0010] Figure 3 This illustrates the typical link establishment process.

[0011] Figure 4 The layout of resource units (RUs) used in the 80MHz band is shown.

[0012] Figure 5 This demonstrates operation based on UL-MU.

[0013] Figure 6 An example of a trigger frame is shown.

[0014] Figure 7 An example of a common information field for a trigger frame is shown.

[0015] Figure 8 Examples of subfields included in each user information field are shown.

[0016] Figure 9 An example of a PPDU used in this specification is shown.

[0017] Figure 10 Examples of modified transmitting and / or receiving devices are shown in this specification.

[0018] Figure 11 An example of a trigger frame is shown.

[0019] Figure 12 An implementation of method 1-1A is shown.

[0020] Figure 13 An implementation of method 1-1A is shown.

[0021] Figure 14 An implementation of method 1-1B is shown.

[0022] Figure 15 An implementation of method 1-1B is shown.

[0023] Figure 16 An implementation of a trigger frame / TB PPDU transmitted via a 320MHz bandwidth using indication method B is shown.

[0024] Figure 17 An implementation of a trigger frame / TB PPDU transmitted via a 320MHz bandwidth using indication method A is shown.

[0025] Figure 18 An implementation of a trigger frame / TB PPDU transmitted via a 320MHz bandwidth using indication method B is shown.

[0026] Figure 19 This illustrates an implementation of a method for including special information in a user information field associated with a specific AID.

[0027] Figure 20 This illustrates an implementation of a method for including special information in a user information field associated with a specific AID.

[0028] Figure 21 This illustrates an implementation of a method for including special information in a user information field associated with a specific AID.

[0029] Figure 22 An implementation method for operating the STA is shown.

[0030] Figure 23 An implementation method for operating the AP is shown. Detailed Implementation

[0031] In this specification, "A or B" may mean "A only", "B only", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B or C" may mean "A only", "B only", "C only", or "any combination of A, B, and C".

[0032] The forward slash ( / ) or comma used in this specification may indicate "and / or". For example, "A / B" may mean "A and / or B". Therefore, "A / B" may mean "A only", "B only", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0033] In this specification, "at least one of A and B" may mean "A only", "B only" or "both A and B". Additionally, in this specification, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0034] Additionally, in this specification, "at least one of A, B, and C" may mean "A only", "B only", "C only" or "any combination of A, B, and C". Furthermore, "at least one of A, B, or C" or "at least one of A, B, and / or C" may mean "at least one of A, B, and C".

[0035] Additionally, the parentheses used in this specification can indicate "for example". Specifically, when indicated as "control information (EHT-signal)", it can mean that an "EHT-signal" is proposed as an example of "control information". In other words, "control information" in this specification is not limited to "EHT-signal", and an "EHT-signal" can be proposed as an example of "control information". Furthermore, when indicated as "control information (i.e., EHT signal)", it can also mean that an "EHT signal" is proposed as an example of "control information".

[0036] The technical features described individually in one of the accompanying drawings of this specification may be implemented individually or simultaneously.

[0037] The examples in this specification can be applied to various wireless communication systems. For example, the examples in this specification can be applied to wireless local area network (WLAN) systems. For example, this specification can be applied to the IEEE 802.11a / g / n / ac standard or the IEEE 802.11ax standard. Additionally, this specification can be applied to the newly proposed EHT standard or the IEEE 802.11be standard. Furthermore, the examples in this specification can be applied to new WLAN standards enhanced from the EHT standard or the IEEE 802.11be standard. Additionally, the examples in this specification can be applied to mobile communication systems. For example, it can be applied to mobile communication systems based on Long Term Evolution (LTE) standards that rely on the 3rd Generation Partnership Project (3GPP) standards, and mobile communication systems based on LTE evolution. Additionally, the examples in this specification can be applied to communication systems based on the 5G NR standard of the 3GPP standard.

[0038] In the following text, for the purpose of describing the technical features of this specification, technical features that can be applied to this specification will be described.

[0039] Figure 1 Examples of transmitting and / or receiving devices are shown in this specification.

[0040] exist Figure 1 In the examples, the various technical features described below can be performed. Figure 1 This involves at least one station (STA). For example, STA 110 and 120 in this specification may also be referred to by various terms such as mobile terminal, wireless device, wireless transceiver unit (WTRU), user equipment (UE), mobile station (MS), mobile subscriber unit, or simply user. STA 110 and 120 in this specification may also be referred to by various terms such as network, base station, Node B, access point (AP), repeater, router, relay, etc. STA 110 and 120 in this specification may also be referred to by various names such as receiving device, transmitting device, receiving STA, transmitting STA, receiving apparatus, transmitting apparatus, etc.

[0041] For example, STA 110 and 120 can be used as an AP or a non-AP. That is, STA 110 and 120 of this specification can be used as an AP and / or a non-AP.

[0042] In addition to the IEEE 802.11 standard, STAs 110 and 120 in this specification can support various communication standards together. For example, they can support communication standards based on 3GPP standards (e.g., LTE, LTE-A, 5G NR standards). Furthermore, the STAs in this specification can be implemented in various devices such as mobile phones, vehicles, and personal computers. Additionally, the STAs in this specification can support various communication services such as voice calls, video calls, data communications, and autonomous driving.

[0043] The STA 110 and 120 of this specification may include a media access control (MAC) compliant with the IEEE 802.11 standard and a physical layer interface for radio media.

[0044] The following will refer to Figure 1 Subgraph (a) describes STA 110 and 120.

[0045] The first STA 110 may include a processor 111, a memory 112, and a transceiver 113. The processor, memory, and transceiver shown may be implemented as separate chips, or at least two blocks / functions may be implemented as a single chip.

[0046] 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.).

[0047] For example, the first STA 110 can perform the operations intended by the AP. For example, the AP's processor 111 can receive signals via transceiver 113, process receive (RX) signals, generate transmit (TX) signals, and provide control over signal transmission. The AP's memory 112 can store signals received via transceiver 113 (e.g., RX signals) and can store signals to be transmitted via transceiver 113 (e.g., TX signals).

[0048] For example, the second STA 120 can perform operations not expected by the AP STA. For example, the non-AP transceiver 123 performs signal transmission / reception operations. Specifically, it can transmit / receive IEEE 802.11 packets (e.g., IEEE 802.11a / b / g / n / ac / ax / be packets, etc.).

[0049] 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).

[0050] For example, the operation of a device designated as an AP in the description below can be performed in either the first STA 110 or the second STA 120. For instance, if the first STA 110 is an AP, the operation of the device designated as an AP can be controlled by the processor 111 of the first STA 110, and related signals can be transmitted or received via a transceiver 113 controlled by the processor 111 of the first STA 110. Additionally, control information related to the operation of the AP or the AP's TX / RX signals can be stored in the memory 112 of the first STA 110. Similarly, if the second STA 120 is an AP, the operation of the device designated as an AP can be controlled by the processor 121 of the second STA 120, and related signals can be transmitted or received via a transceiver 123 controlled by the processor 121 of the second STA 120. Furthermore, control information related to the operation of the AP or the AP's TX / RX signals can be stored in the memory 122 of the second STA 120.

[0051] For example, in the description below, the operation of a device indicated as a non-AP (or user STA) can be performed in either the first STA 110 or the second STA 120. For instance, if the second STA 120 is a non-AP, the operation of the device indicated as a non-AP can be controlled by the processor 121 of the second STA 120, and related signals can be transmitted or received via a transceiver 123 controlled by the processor 121 of the second STA 120. Additionally, control information related to the operation of a non-AP or non-AP TX / RX signals can be stored in the memory 122 of the second STA 120. Similarly, if the first STA 110 is a non-AP, the operation of the device indicated as a non-AP can be controlled by the processor 111 of the first STA 110, and related signals can be transmitted or received via a transceiver 113 controlled by the processor 111 of the first STA 110. Additionally, control information related to the operation of a non-AP or non-AP TX / RX signals can be stored in the memory 112 of the first STA 110.

[0052] In the following description, the devices referred to as (transmit / receive) STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmit / receive) terminal, (transmit / receive) device, (transmit / receive equipment), network, etc., may refer to... Figure 1 STAs 110 and 120. For example, devices designated 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) equipment, network, etc., may refer to... 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 This is performed in transceivers 113 and 123. Additionally, in the following examples, various STA operations for generating TX / RX signals or pre-performing data processing and calculations on TX / RX signals can be performed within these transceivers. Figure 1 The operations are executed in processors 111 and 121. Examples of operations for generating TX / RX signals or pre-performing data processing and calculations may include: 1) operations to determine / obtain / configure / calculate / decode / encode bit information of subfields (SIG, STF, LTF, Data) included in the PPDU; 2) operations to determine / configure / obtain time resources or frequency resources (e.g., subcarrier resources) for the subfields (SIG, STF, LTF, Data) included in the PPDU; 3) operations to determine / configure / obtain specific sequences (e.g., pilot sequences, STF / LTF sequences, additional sequences applied to SIG) for the subfields (SIG, STF, LTF, Data) included in the PPDU; 4) power control operations and / or power-saving operations applied to the STA; and 5) operations related to the determination / obtaining / configuration / decoding / encoding of the ACK signal. Additionally, in the following examples, various information (e.g., information related to fields / subfields / control fields / parameters / power, etc.) used by various STAs to determine / obtain / configure / calculate / decode / decode the TX / RX signal may be stored in... Figure 1 In memory 112 and 122.

[0053] Figure 1 The aforementioned device / STA in subgraph (a) can be as follows Figure 1 The subgraph (b) is modified as shown below. In the following text, the modifications will be based on... Figure 1 The sub-diagram (b) is used to describe STA 110 and STA120 in this specification.

[0054] For example, Figure 1 The transceivers 113 and 123 shown in subgraph (b) can perform the same functions as... Figure 1 The transceiver shown in sub-diagram (a) has the same function as the aforementioned transceiver. For example, Figure 1The processing chips 114 and 124 shown in sub-figure (b) may include processors 111 and 121 and memories 112 and 122. Figure 1 The processors 111 and 121 and the memories 112 and 122 shown in sub-figure (b) can perform operations related to Figure 1 The processors 111 and 121 and the memories 112 and 122 shown in sub-figure (a) have the same functions.

[0055] The mobile terminal, wireless device, wireless transceiver unit (WTRU), user equipment (UE), mobile station (MS), mobile subscriber unit, user, subscriber STA, network, base station, node B, access point (AP), repeater, router, relay, receiving unit, transmitting unit, receiving STA, transmitting STA, receiving device, transmitting device, receiving equipment and / or transmitting equipment described below may mean Figure 1 The STA 110 and 120 shown in subgraphs (a) / (b) may mean, or Figure 1 The processing chips 114 and 124 are shown in sub-figure (b). That is to say, the technical features of this specification can be found in... Figure 1 It can be performed in STA 110 and 120 as shown in subgraphs (a) / (b), or it can be performed only in... Figure 1 The processing chips 114 and 124 shown in sub-diagram (b) are executed Figure 1 Transceivers 113 and 123 are shown in sub-diagrams (a) and (b). For example, the technical features of transmitting control signals by the STA can be understood as being through... Figure 1 The transceiver 113 shown in sub-diagrams (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) / (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).

[0056] For example, the technical characteristics of receiving STA control signals can be understood as through... Figure 1 The technical features of transceivers 113 and 123 receiving control signals shown in sub-figure (a) are illustrated. Alternatively, the technical features of receiving STA control signals can be understood as being achieved through... Figure 1 Processors 111 and 121 shown in subgraph (a) obtain Figure 1 The technical features of the control signals received in transceivers 113 and 123 shown in sub-figure (a). Alternatively, the technical features of receiving STA control signals can be understood as being through... Figure 1The 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).

[0057] Reference Figure 1 Subgraph (b), software codes 115 and 125 can be included in memories 112 and 122. Software codes 115 and 126 can include instructions for controlling the operation of processors 111 and 121. Software codes 115 and 125 can be included in various programming languages.

[0058] 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 processing chips 114 and 124 can be made by The SNAPDRAGON™ processor series manufactured by The EXYNOS™ processor series manufactured by The processor series manufactured by The HELIO™ processor series manufactured by The ATOM™ series of processors manufactured or processors enhanced from these processors.

[0059] In this specification, uplink can mean a link used for communication from a non-AP STA to an SP STA, and uplink PPDUs / packets / signals, etc., can be transmitted through the uplink. Similarly, in this specification, downlink can mean a link used for communication from an AP STA to a non-AP STA, and downlink PPDUs / packets / signals, etc., can be transmitted through the downlink.

[0060] Figure 2 This is a conceptual diagram illustrating the structure of a wireless local area network (WLAN).

[0061] Figure 2 The upper part shows the structure of the Infrastructure Basic Services Set (BSS) of the Institute of Electrical and Electronics Engineers (IEEE) 802.11.

[0062] Reference Figure 2The 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.

[0063] A BSS may include at least one STA, an AP that provides distributed services, and a distributed system (DS) 210 that connects multiple APs.

[0064] Distributed system 210 can implement an Extended Service Set (ESS) 240 that is expanded by connecting multiple BSSs 200 and 205. ESS 240 can be used as a term to refer to a network configured by connecting one or more APs 225 or 230 via distributed system 210. APs included in an ESS 240 may have the same Service Set Identifier (SSID).

[0065] Portal 220 can be used as a bridge to connect a wireless LAN network (IEEE 802.11) to another network (e.g., 802.X).

[0066] exist Figure 2 The BSS shown at the top enables networking between APs 225 and 230, as well as between APs 225 and 230 and STAs 200-1, 205-1, and 205-2. However, it also allows for networking between STAs to perform communication even without APs 225 and 230. Networks that enable communication between STAs by configuring networks even without APs 225 and 230 are defined as self-organizing networks or Independent Basic Service Sets (IBSS).

[0067] Figure 2 The lower part shows a conceptual diagram illustrating the IBSS.

[0068] Reference Figure 2 The lower part of the IBSS is a BSS that operates in a self-organizing mode. Because 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.

[0069] Figure 3This illustrates the typical link establishment process.

[0070] 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.

[0071] Figure 3 This illustrates network discovery operations including active scanning. 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 nearby 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, move to the next channel (e.g., channel 2), and perform a scan in the same way (e.g., sending a probe request and receiving a probe response via channel 2).

[0072] although Figure 3 As 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 is used to periodically send 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 related to 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 scanning on the next channel using the same method.

[0073] 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.

[0074] The authentication frame may include information related to the authentication algorithm number, authentication transaction sequence number, status code, challenge text, robust security network (RSN), and finite cyclic group.

[0075] 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 provide the authentication processing result to the STA via an authentication response frame.

[0076] 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 related to various capabilities, beacon listening interval, service set identifier (SSID), supported rates, supported channels, RSN, mobile domain, supported operation class, service indication map (TIM) broadcast request, and interoperability service capabilities. Similarly, the association response frame may include information related to various capabilities, status code, 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.

[0077] 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).

[0078] Figure 4 The layout of resource units (RUs) used in the 80MHz band is shown.

[0079] RUs of various sizes can be used, such as 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, and 996-RU. Furthermore, seven DC tones can be inserted into the center frequency, 12 tones can be used in the leftmost guard band of the 80MHz band, and 11 tones can be used in the rightmost guard band of the 80MHz band. Additionally, a 26-RU corresponding to 13 tones on each of the left and right sides of the DC band can be used.

[0080] like Figure 7 As shown, when the RU layout is used for a single user, a 996-RU can be used, in which case five DC tones can be inserted.

[0081] The RUs described in this specification can be used for both uplink (UL) and downlink (DL) communication. For example, when performing UL-MU communication requested by a trigger frame, a transmitting STA (e.g., an AP) can assign a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a first STA and a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a second STA via the trigger frame. Thereafter, the first STA can send a first trigger-based PPDU based on the first RU, and the second STA can send a second trigger-based PPDU based on the second RU. The first and second trigger-based PPDUs are sent to the AP in the same (or overlapping) time periods.

[0082] For example, when configuring a DL MU PPDU, a transmitting STA (e.g., an AP) can assign a first RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a first STA and a second RU (e.g., 26 / 52 / 106 / 242-RU, etc.) to a second STA. That is, a transmitting STA (e.g., an AP) can transmit HE-STF, HE-LTF, and data fields for a first STA through the first RU in a MU PPDU, and can transmit HE-STF, HE-LTF, and data fields for a second STA through the second RU.

[0083] Information related to the layout of the RU can be communicated via HE-SIG-B signals.

[0084] Figure 5 The operation based on UL-MU is illustrated. As shown, a transmitting STA (e.g., AP) can perform channel access through contention (e.g., backoff operation) and can transmit trigger frame 1030. That is, the transmitting STA can transmit a PPDU including trigger frame 1030. Upon receiving the PPDU including the trigger frame, a trigger-based (TB) PPDU is transmitted after a delay corresponding to SIFS.

[0085] TB PPDUs 1041 and 1042 can be transmitted in the same time period and can be transmitted from multiple STAs (e.g., user STAs) having the AID indicated in trigger frame 1030. The ACK frame 1050 for the TB PPDU can be implemented in various forms.

[0086] Reference Figures 6 to 8Describe the specific characteristics of the trigger frame. Even when using UL-MU communication, Orthogonal Frequency Division Multiple Access (OFDMA) or MU-MIMO schemes can be used, and both OFDMA and MU-MIMO schemes can be used simultaneously.

[0087] Figure 6 An example of a trigger frame is shown. Figure 6 The trigger frame allocates resources for uplink multi-user (MU) transmissions and can be sent, for example, from the AP.

[0088] Figure 6 The fields shown can be partially omitted, and additional fields can be added. Furthermore, the length of each field can be changed to be different from that shown in the figure.

[0089] Figure 6 The frame control field 1110 may include information related to the MAC protocol version and additional control information. The duration field 1120 may include time information configured in the NAV or information related to the STA's identifier (e.g., AID).

[0090] Additionally, the RA field 1130 may include address information of the receiving STA corresponding to the trigger frame, and may optionally be omitted. The TA field 1140 may include address information of the STA (e.g., AP) that sent the corresponding trigger frame. The common information field 1150 includes common control information applied to the receiving STA that receives the corresponding trigger frame. For example, it may include a field indicating the length of the L-SIG field of the uplink PPDU sent in response to the corresponding trigger frame, or information for controlling the content of the SIG-A field (i.e., the HE-SIG-A field) of the uplink PPDU sent in response to the corresponding trigger frame. Furthermore, as common control information, it may include information related to the length of the CP of the uplink PPDU sent in response to the corresponding trigger frame, or information related to the length of the LTF field.

[0091] Additionally, it is preferable to include receiving Figure 6 The number of STAs receiving the trigger frame corresponds to the per-user information fields 1160#1 to 1160#N. The per-user information field can also be referred to as the "allocation field".

[0092] in addition, Figure 6 The trigger frame may include a padding field 1170 and a frame check sequence field 1180.

[0093] Figure 6 Each of the user information fields 1160#1 to 1160#N shown may include multiple subfields.

[0094] Figure 7 An example of a common information field for a trigger frame is shown. Figure 7Subfields can be partially omitted, and additional subfields can be added. Furthermore, the length of each subfield shown can be changed.

[0095] The length field 1210 shown has the same value as the length field of the L-SIG field of the uplink PPDU sent in response to the corresponding trigger frame, and the length field of the L-SIG field of the uplink PPDU indicates the length of the uplink PPDU. As a result, the length field 1210 of the trigger frame can be used to indicate the length of the corresponding uplink PPDU.

[0096] Additionally, the concatenation identifier field 1220 indicates whether a concatenation operation is performed. A concatenation operation means that downlink MU transmissions and uplink MU transmissions are performed together in the same TXOP. That is, it means performing downlink MU transmissions, followed by uplink MU transmissions after a preset time (e.g., SIFS). During a concatenation operation, only one transmitting device (e.g., AP) can perform downlink communication, and multiple transmitting devices (e.g., non-APs) can perform uplink communication.

[0097] CS requires field 1230 to indicate whether the radio medium state or NAV must be considered when the receiving device sends the corresponding uplink PPDU upon receiving the corresponding trigger frame.

[0098] HE-SIG-A information field 1240 may include information for controlling the contents of the SIG-A field (i.e., the HE-SIG-A field) of the uplink PPDU in response to a corresponding trigger frame.

[0099] The CP and LTF type fields 1250 may include information related to the CP length and LTF length of the uplink PPDU sent in response to the corresponding trigger frame. The trigger type field 1260 may indicate the purpose of using the corresponding trigger frame, such as typical trigger, beamforming trigger, request block ACK / NACK, etc.

[0100] It may be assumed that the trigger type field 1260 of the trigger frame in this specification indicates a trigger frame of a basic type used for typical triggering. For example, a trigger frame of a basic type may be referred to as a basic trigger frame.

[0101] Figure 8 Examples of subfields included in each user information field are shown. Figure 8 The user information field 1300 can be understood as the reference above. Figure 6 Any one of the user information fields 1160#1 to 1160#N mentioned. Included. Figure 8 The subfields in the user information field 1300 can be partially omitted, and additional subfields can be added. Furthermore, the length of each subfield shown can be changed.

[0102] Figure 8 The User Identifier field 1310 indicates the identifier of the STA (i.e., the receiving STA) corresponding to each user information. An example of the identifier can be all or part of the Associated Identifier (AID) value of the receiving STA.

[0103] Additionally, an RU allocation field 1320 may be included. That is, when a receiving STA, identified by the user identifier field 1310, sends a TB PPDU in response to a trigger frame, the TB PPDU is sent through the RU indicated by the RU allocation field 1320. In this case, the RU indicated by the RU allocation field 1320 may be... Figure 4 The RU shown.

[0104] Figure 8 The subfields may include the encoding type field 1330. The encoding type field 1330 can indicate the encoding type of the TB PPDU. For example, when BCC encoding is applied to the TB PPDU, the encoding type field 1330 can be set to "1", and when LDPC encoding is applied, the encoding type field 1330 can be set to "0".

[0105] in addition, Figure 8 The subfields may include the MCS field 1340. The MCS field 1340 may indicate the MCS scheme applied to the TB PPDU. For example, when BCC encoding is applied to the TB PPDU, the encoding type field 1330 may be set to "1", and when LDPC encoding is applied, the encoding type field 1330 may be set to "0".

[0106] The following describes the PPDUs sent / received in the STA of this specification.

[0107] Figure 9 An example of a PPDU used in this specification is shown.

[0108] Figure 9 The PPDU may be referred to by various terms such as EHT PPDU, TX PPDU, RX PPDU, Type 1 or Type N PPDU, etc. For example, in this specification, PPDU or EHT PPDU may be referred to by various terms such as TX PPDU, RX PPDU, Type 1 or Type N PPDU, etc. Furthermore, EHT PPDUs may be used in EHT systems and / or new WLAN systems enhanced from EHT systems.

[0109] Figure 9 The PPDU can indicate all or part of the PPDU types used in the EHT system. For example, Figure 9 The example can be used in both single-user (SU) and multi-user (MU) modes. In other words, Figure 9 The PPDU can be used for one or more receiving STAs. When Figure 9 When using trigger-based (TB) mode, the PPDU can be omitted. Figure 9 The EHT-SIG. In other words, the STA that has received the trigger frame for the uplink MU (UL-MU) can send... Figure 9 The PPDU for EHT-SIG is omitted in the example.

[0110] exist Figure 9 In this context, L-STF to EHT-LTF can be referred to as preamble or physical preamble, and can be generated / sent / received / acquired / decoded at the physical layer.

[0111] Figure 9 The subcarrier spacing of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields can be determined to be 312.5 kHz, and the subcarrier spacing of the EHT-STF, EHT-LTF, and data fields can be determined to be 78.125 kHz. That is, the tone index (or subcarrier index) of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields can be represented in units of 312.5 kHz, and the tone index (or subcarrier index) of the EHT-STF, EHT-LTF, and data fields can be represented in units of 78.125 kHz.

[0112] exist Figure 9 In the PPDU, L-LTF and L-STF can be the same as those in the traditional fields.

[0113] The transmitting STA can generate an RL-SIG in the same manner as the L-SIG. BPSK modulation can be applied to the RL-SIG. The receiving STA can determine whether the RX PPDU is an HE PPDU or an EHT PPDU based on the presence of the RL-SIG.

[0114] Universal SIG (U-SIG) can be inserted in Figure 9 Following RL-SIG. U-SIG can be referred to by various terms such as First SIG Field, First SIG, First Type SIG, Control Signal, Control Signal Field, First (Type) Control Signal, etc.

[0115] The U-SIG may include N bits of information and may include information for identifying the type of EHT PPDU. For example, the U-SIG may be configured based on two symbols (e.g., two adjacent OFDM symbols). Each symbol of the U-SIG (e.g., an OFDM symbol) may have a duration of 4 μs. Each symbol of the U-SIG may be used to transmit 26 bits of information. For example, each symbol of the U-SIG may be based on 52 data tones and 4 pilot tones for transmission / reception.

[0116] The public fields and user-specific fields of EHT-SIG can be encoded separately. A user block field included in the user-specific fields can include information for two users, but the last user block field included in the user-specific fields can include information for one user. That is, a user block field of EHT-SIG can include at most two user fields. Figure 6 In the example, each user field may be related to MU-MIMO allocation or non-MU-MIMO allocation.

[0117] The common fields of EHT-SIG may include CRC bits and tail bits. The length of the CRC bits can be determined to be 4 bits. The length of the tail bits can be determined to be 6 bits and can be set to "000000".

[0118] The common fields of EHT-SIG may include RU allocation information. RU allocation information may indicate information related to the location of RUs allocated to multiple users (i.e., multiple receiving STAs). As shown in Table 1, RU allocation information can be configured in 8-bit (or N-bit) units.

[0119] In the following examples, signals represented as (TX / RX / UL / DL) signals, (TX / RX / UL / DL) frames, (TX / RX / UL / DL) packets, (TX / RX / UL / DL) data units, (TX / RX / UL / DL) data, etc., can be based on... Figure 9 The signals transmitted / received by the PPDU. Figure 9 PPDUs can be used to send / receive various types of frames. For example, Figure 9 PPDUs can be used in control frames. Examples of control frames may include Request to Send (RTS), Clear to Send (CTS), Power Saving Poll (PS-poll), BlockACKReq, BlockAck, Null Data Packet (NDP) announcement, and trigger frames. For example, Figure 9 PPDUs can be used for management frames. Examples of management frames may include beacon frames, (re)association request frames, (re)association response frames, probe request frames, and probe response frames. For example, Figure 9 PPDUs can be used in data frames. For example, Figure 9A PPDU can be used to send at least two or more of control frames, management frames, and data frames simultaneously.

[0120] Figure 10 Examples of modified transmitting and / or receiving devices are shown in this specification.

[0121] Figure 1 Each device / STA in subgraphs (a) / (b) can be as follows Figure 10 The modifications shown are as follows. Figure 10 The transceiver 630 can be used with Figure 1 The transceivers 113 and 123 are the same. Figure 10 The transceiver 630 may include a receiver and a transmitter.

[0122] Figure 10 The processor 610 can be with Figure 1 The processors 111 and 121 are the same. Alternatively, Figure 10 The processor 610 can be with Figure 1 The processing chips 114 and 124 are the same.

[0123] Figure 10 The memory 620 can be with Figure 1 The memories 112 and 122 are the same. Alternatively, Figure 10 The memory 620 can be with Figure 1 The memories 112 and 122 are different separate external memories.

[0124] Reference Figure 10 The power management module 611 manages the power used by the processor 610 and / or transceiver 630. The battery 612 supplies power to the power management module 611. The display 613 outputs the results processed by the processor 610. The keypad 614 receives inputs to be used by the processor 610. The keypad 614 can be displayed on the display 613. The SIM card 615 can be an integrated circuit for securely storing the International Mobile Subscriber Identity (IMSI) and its associated keys, used for identifying and authenticating users on mobile phone devices (e.g., mobile phones and computers).

[0125] Reference Figure 10 The speaker 640 can output results related to the sound processed by the processor 610. The microphone 641 can receive input related to the sound to be used by the processor 610.

[0126] Puncture information can be indicated in the Triggered-Based (TB) Physical Protocol Data Unit (PPDU) of 11be. That is, the TBPPDU may include puncture information. However, when transmitting trigger frames using non-HT repetitive PPDUs, if transmitted in punctured form, the STA receiving the trigger frame cannot identify the puncture information using only the content included in the existing trigger frame. The following describes information that may be included in the trigger frame, as well as trigger frames that include new information while maintaining the existing configuration. For example, the new information may be information included in the trigger frame to support EHT. For example, the new information may include puncture information, information related to whether 320MHz is supported, etc.

[0127] Figure 11 An example of a trigger frame is shown.

[0128] Reference Figure 11 The trigger frame includes reserved bits. Reserved bits can be used to allow the trigger frame to include new information.

[0129] 1. Maintain the existing trigger frame, indicating the maximum UL BW.

[0130] To indicate additional information while maintaining the existing trigger frame format, existing bits should be used while maintaining the total number of bits included in the trigger frame. As in the conventional case (i.e., 11ax), this implementation assumes a maximum uplink (UL) bandwidth (BW) of 160 MHz.

[0131] 1) Use the HE-SIG-A2 reserved field to indicate the punching information (PI).

[0132] By default, the HE-SIG-A2 reserved field value, which exists in the common fields of the trigger frame, can be included in the reserved field of the trigger-based (TB)PPDU SIG-A2. Specifically, in 11be, the existing 11ax HE-SIG-A can be replaced by U-SIG. The HE-SIG-A2 reserved field can be used to indicate punch information. The following issues need to be considered when indicating punch information.

[0133] - Number of PI bits: The number of bits can be considered statically or dynamically, depending on the UL bandwidth (BW) value of the common field. That is, the number of bits related to PI can be set to a specific value or can vary according to the UL BW.

[0134] - Instruction method

[0135] A. If no punch pattern is defined, a bitmap that indicates whether each 20MHz segment is punched can be used (e.g., if it is 1, then it is punched).

[0136] B. If a punch pattern is defined, values ​​can be assigned to each pattern. That is, the index corresponding to each punch pattern can be used. Punch patterns may not cover all possibilities, and only specific patterns may be used.

[0137] For example, if the number of patterns is 10 (i.e., if only 10 punch patterns are used), then 4 bits can be used to indicate the patterns (e.g., 0000 to 1001) depending on the individual values.

[0138] 1-1) Static method: Set the maximum number of PI bits, regardless of the UL BW value.

[0139] In this embodiment, the method for fixing the number of PI bits is described separately according to the above-described indication methods A and B.

[0140] 1-1A) In the case of indication method A, that is, in the case of using a bitmap that independently indicates whether each 20MHz segment is punched, if the (local) BW indicated in the PHY (e.g., in U-SIG) is at most 80MHz, the maximum PI bit is 4 bits, and if the BW indicated in the PHY is at most 160MHz, the maximum PI bit is 8 bits.

[0141] It can be indicated in an ordered manner starting from bit 0 according to the UL BW value, and the part that does not correspond to it can be reserved bits. For example, if the maximum UL BW is 160MHz, then the maximum number of PI bits can be 8 bits and the UL BW can be 80MHz. If the first 4 bits are 1110, it means that the last 20MHz segment of 80MHz is punched, and the last 4 bits can be reserved.

[0142] Figure 12 An implementation of method 1-1A is shown.

[0143] Reference Figure 12 The maximum (local) BW can be 160MHz, and the UL BW can also be 160MHz. Since the maximum UL BW is 160MHz, the number of bits is 8. Because the 3rd and 4th 20MHz segments are punctured, the PI can include bitmap 00110000. The TBPPDU can include punctured information in the U-SIG, and the punctured information included in the U-SIG of the TB PPDU can also include bitmap 00110000. The TB PPDU can also be transmitted through the channel with the 3rd and 4th 20MHz segments punctured.

[0144] Figure 13 An implementation of method 1-1A is shown.

[0145] Reference Figure 13The maximum (local) BW can be 80MHz, and the UL BW can also be 80MHz. Since the maximum (local) ULBW is 80MHz, the number of bits is 4. Because the 3rd and 4th 20MHz bands are punctured, the PI can include bitmaps 0011 and 0000, respectively. That is, the PI of a trigger frame transmitted in the 80MHz band including the punctured area can include bitmap 0011, and the PI of a trigger frame transmitted in the non-punctured 80MHz band can include bitmap 0000. The TB PPDU can include punctured information in the U-SIG, and the punctured information included in the U-SIG of the TB PPDU can also include bitmaps 0011 and 0000, respectively. The TB PPDU can also be transmitted through channels where the 3rd and 4th 20MHz bands are punctured.

[0146] 1-1B) In the case of indication method B, that is, when a punch pattern is defined and an index corresponding to each punch pattern is used, if the (local) BW indicated in the PHY (e.g., in U-SIG) is at most 80MHz, and if two punch patterns are defined at 40MHz and three punch patterns are defined at 80MHz, then the maximum PI bits are 3 bits since the total number of patterns is 5.

[0147] Figure 14 An implementation of method 1-1B is shown.

[0148] Reference Figure 14 The maximum (local) BW can be 160MHz, and the UL BW can also be 160MHz. For example, when the number of defined patterns is less than or equal to 16, the number of PI bits can be 4. When the index of the pattern punctured in the 220MHz segment is 0100, the PI of the trigger frame can include bitmap 0100. The TB PPDU can include the puncturing information in the U-SIG, and the puncturing information included in the U-SIG of the TB PPDU can also include bitmap 0100. The TB PPDU can also be transmitted through the channel punctured in the 220MHz segment.

[0149] Figure 15 An implementation of method 1-1B is shown.

[0150] Reference Figure 15The maximum (local) BW can be 80MHz, and the UL BW can also be 80MHz. For example, when the number of defined patterns is less than or equal to 8, the number of PI bits can be 3. When the index of the pattern that is punctured in the 2nd 20MHz segment is 010, the PI of the trigger frame can include bitmaps 010 and 000. That is, the PI of the trigger frame transmitted in the 80MHz band including the punctured area can include bitmap 010, and the PI of the trigger frame transmitted in the non-punctured 80MHz band can include bitmap 000. That is, if the PI of the trigger frame includes bitmap 010, it may mean that the 2nd 20MHz segment of 80MHz is punctured, and if the PI of the trigger frame includes bitmap 000, it may mean that there is no punctured portion in 80MHz. The TB PPDU can include punctured information in the U-SIG, and the punctured information included in the U-SIG of the TB PPDU can also include bitmaps 010 and 000. TB PPDUs can also be transmitted via a punctured channel in the 20MHz band.

[0151] 1-2) Dynamic method: with undetermined (TBD) bits based on UL BW value.

[0152] According to this embodiment, the number of PI bits can vary depending on the UL BW value.

[0153] 1-2A) In the case of indication method A, that is, in the case of using a bitmap that independently indicates whether each 20MHz segment is punched, it is 8 bits if the UL BW is 160MHz and 4 bits if the UL BW is 80MHz.

[0154] 1-2B) In the case of indication method B, that is, when a punch pattern is defined and an index corresponding to each punch pattern is used, if two punch patterns are defined at 40MHz and three punch patterns are defined at 80MHz, then PI can be 1 bit in the case of 40MHz and 2 bits in the case of 80MHz.

[0155] Besides the fact that the number of PI bits can be dynamically changed, UL BW is 160MHz (Examples 1-2) and Figure 12 The same applies to the example where the maximum local BW is 160MHz. For example, if the maximum (local) BW is 160MHz and the UL BW of the trigger frame is 80MHz, then it is the same as... Figure 12 The number of PI bits can be 4 bits, unlike the example of the bitmap.

[0156] 2. Maintain the existing trigger frame, with a maximum UL BW of at least 160MHz.

[0157] To indicate additional information while maintaining the existing trigger frame format, existing bits should be used while maintaining the total number of bits. Additionally, to indicate a UL BW of at least 160MHz (e.g., a 320MHz UL BW), information for the 320MHz BW may be included in addition to the existing UL BW bits.

[0158] This embodiment may further include a wider bandwidth indication (e.g., information indicating bandwidth extension, bandwidth extension information) in the method described in Section 1. Hereinafter, only the wider bandwidth method will be described, and the PI indication will be the same as in Section 1.

[0159] 1) Use of bits for wider bandwidth

[0160] First, a wider bandwidth can be indicated using the HE-SIG-A2 reserved field or reserved bits, and the method for indicating PI can be the same as that in Section 4.1. Specifically, a punch-pattern-based indication method (Indication Method B in Section 1) can be used to reduce overhead.

[0161] - Wider bandwidth indication Use 1 bit (e.g., if 1, then 320MHz; if 0, then 240MHz is reserved (if 240MHz is defined)).

[0162] - PI method Apply the method in Section 1

[0163] Figure 16 An implementation of a trigger frame / TB PPDU transmitted via a 320MHz bandwidth using indication method B is shown.

[0164] Reference Figure 16 The maximum (local) BW can be 320MHz, and the UL BW can also be 320MHz. For example, when the number of defined patterns is less than or equal to 32, the number of PI bits can be 5. The PI of the trigger frame can include 1 bit (1) related to the 320MHz bandwidth. For example, the PI of the trigger frame can include bitmap 100110. If the index of the pattern for the 3rd and 4th 20MHz segments of the main 160MHz and the 1st and 2nd 20MHz segments of the auxiliary 160MHz is 00110, then the PI of the trigger frame can include bitmap 00110. That is, if the PI of the trigger frame includes bitmap 100110, it may mean that the 3rd, 4th, 9th and 10th 20MHz segments of 320MHz are punctured. That is, the first bit can be related to the 320MHz bandwidth, and the last 5 bits can be related to the puncturing pattern. The TB PPDU can include punch information in the U-SIG, and the punch information included in the U-SIG of the TB PPDU can also include bitmap 00110. The TB PPDU can also be transmitted through the punched channels of segments 3, 4, 9, and 10.

[0165] 2) Define new trigger variants for wider bandwidth

[0166] That is, this variant uses the trigger-related public field to indicate the additional wider bandwidth and its PI. Information about the primary 160MHz at 320MHz can be indicated using the method defined in Section 1. That is, the PI for the wider bandwidth and the secondary 160MHz uses the related field.

[0167] 2-1) When wider bandwidth only exists in 320MHz

[0168] Wider bandwidth indication Use 1 bit (e.g., 320MHz if it is 1).

[0169] PI The same method as defined in Section 1 (up to 160MHz) can be used.

[0170] Specifically, method B can be interpreted differently depending on the method. This is described in the following example.

[0171] Figure 17 An implementation of a trigger frame / TB PPDU transmitted via a 320MHz bandwidth using indication method A is shown.

[0172] Reference Figure 17The maximum (local) BW can be 320MHz, and the UL BW can also be 320MHz. Since the maximum UL BW is 320MHz, the number of bits is 16. In this document, an additional 1 bit related to the 320MHz bandwidth may be included (1). For example, the PI of the trigger frame may include bitmap 00110000 111000000. An 8-bit bitmap of the primary 160MHz (i.e., 00110000) may be included in the common field, and a 1-bit bitmap related to the 320MHz bandwidth and an 8-bit bitmap of the secondary 160MHz (i.e., 111000000) may be included in the relevant common field. Since the 3rd and 4th 20MHz segments of the primary 160MHz are punctured and the 1st and 2nd 20MHz segments of the secondary 160MHz are punctured, the PI of the trigger frame may include bitmap 00110000 11000000. One bit associated with the 320MHz bandwidth can be included in the first part of the bitmap of the secondary 160MHz. That is, if the PI of the trigger frame includes bitmap 00110000111000000, it may mean that the 3rd, 4th, 9th, and 10th 20MHz segments of the 320MHz band are punctured. Specifically, the 9th bit may be associated with the 320MHz bandwidth, and the remaining bits may be associated with the location of the punctured 20MHz segments. The TB PPDU may include the puncturing information in the U-SIG, and the puncturing information included in the U-SIG of the TB PPDU may also include bitmap 00110000 11000000. The TB PPDU can also be transmitted through the channel where the 3rd, 4th, 9th, and 10th segments are punctured.

[0173] Figure 18 An implementation of a trigger frame / TB PPDU transmitted via a 320MHz bandwidth using indication method B is shown.

[0174] Reference Figure 18 The maximum (local) bandwidth (BW) can be 320MHz, and the UL BW can also be 320MHz. The 3rd and 4th 20MHz segments of the primary 160MHz band can be punctured, and the 1st and 2nd 20MHz segments of the secondary 160MHz band can be punctured. For example, the trigger frame's PI can include bitmap 0100 10011. The 4-bit bitmap of the primary 160MHz band (i.e., 0100) can be included in the common field, and the 1-bit bitmap related to the 320MHz bandwidth and the 4-bit bitmap of the secondary 160MHz band (i.e., 10011) can be included in the relevant common field.

[0175] 0100 and 0011 (besides the 1 bit indicating wider bandwidth) can be interpreted differently depending on the method.

[0176] (1) When the total bit indication punch pattern of the combination of the indications at the primary 160 and the secondary 160 is obtained,

[0177] That is, it can mean that a total of 8 bits 01000011 indicates the pattern of the 3rd, 4th, 9th and 1020MHz segments being punched in the 320MHz punch pattern.

[0178] (2) When pointing to the various patterns at main 160 and auxiliary 160...

[0179] That is, 0100 can refer to the pattern of the 3rd and 4th 20MHz segments of the main 160 being punched, and 0011 can refer to the pattern of the 1st and 2nd 20MHz segments of the auxiliary 160 being punched.

[0180] Compared with method (2), the above method (1) can reduce the average number of bits, but it cannot know the entire punch pattern information until the STA reads the auxiliary 160 part.

[0181] 2-2) When a wider bandwidth exists in 240 / 320MHz

[0182] Wider bandwidth indication: Use 1 bit (e.g., 320MHz if 1, 240MHz if 0)

[0183] => Since a wider bandwidth field has been generated through the variant, both values ​​0 and 1 can be used.

[0184] PI: The same method as defined in Section 1 (up to 160MHz) can be used.

[0185] => Except for instruction 240, this method is the same as method 2-1).

[0186] 3. Maintain existing trigger frames + utilize user information fields

[0187] To indicate additional information while maintaining the existing trigger frame format, the existing bits should be used. Additionally, to indicate at least 160MHz (e.g., 320MHz UL BW), additional information may be required in addition to the existing UL BW bits.

[0188] Sections 1 and 2 primarily utilize common fields. If information different from 11ax is inserted into the reserved bits present in these common fields, a malfunction may occur when the trigger frame is sent to an 11ax-enabled STA. To prevent this, specific user information fields can be defined that are not read from 11ax-enabled STAs and are only read from 11be STAs, through which the 11be STA can obtain specific information.

[0189] This method allows you to set a specific AID. For example, you can use currently reserved AIDs such as 2047, 2048 (or 2007). That is, when the AID value is identified, the 11be STA can decode the fields belonging to the user information associated with the corresponding AID.

[0190] User information fields for a specific AID can be maintained without changing relative to the existing situation, or they can be modified because these fields are only used for 11be STA.

[0191] User information for a specific AID may include punch information (PI). Methods for including the PI may include punch bitmaps (indication method A) and / or punch patterns (indication method B) as mentioned in Section 1 / 2, and both static and dynamic methods may be applied.

[0192] Specifically, the UL BW of up to 160 MHz can be indicated in the public field as in the conventional case, and 240 MHz or 320 MHz can be indicated in the user information field (e.g., 1 bit if only 320 MHz is present, 1 or 2 bits if both 240 MHz and 320 MHz are present, etc.). That is, information related to the 320 MHz bandwidth (e.g., wider bandwidth or bandwidth extension information) can be included in the user information field associated with a specific AID.

[0193] To reduce STA behavior and decoding overhead, fields with a specific AID (i.e., presence fields) can be included in the common fields of the trigger frame. Reserved bits from the common fields can be used for presence fields.

[0194] In other words, based on the existence field of the public fields, the STA can determine whether special information based on a specific AID is included in the user information field. If the existence field includes special information based on a specific AID, the STA can perform the operation of finding the specific AID. If the existence field does not include special information based on a specific AID, the STA can simply perform the operation of finding only its AID, without having to perform the operation of finding the specific AID.

[0195] Figure 19 This illustrates an implementation of a method for including special information in a user information field associated with a specific AID.

[0196] Reference Figure 19The user information field, where the AID12 field value is set to 2047, can include additional information for the 11be STA. That is, a specific AID12 value (e.g., 2047, 2007, etc.) is a value that allows the STA to identify different additional information (e.g., PI, information related to the 320MHz bandwidth, etc.) for triggering. Specifically, the bitmap “1001100011000000” can be included in the user information field associated with the specific AID12 field value, and the “1” in the first part of the bitmap can be associated with the 320MHz bandwidth, while “0011000011000000” in the last part can refer to a 16-bit PI bitmap in 20MHz units. In this document, if the UL BW of the common field is indicated as 160MHz, the 11be STA can first identify this, and then identify whether the bandwidth is 320MHz through the user information field associated with the specific AID (2047) of the user information.

[0197] Figure 20 This illustrates an implementation of a method for including special information in a user information field associated with a specific AID.

[0198] Reference Figure 20 Some portions of the trigger frame can be sent to 11ax STAs, and some portions can be sent to 11be STAs. For example, the trigger frame can be sent to 11ax (above 80MHz) and 11be (below 80MHz) STAs using the UL BW 160MHz. It can be sent separately for each 80MHz UL BW. In this embodiment, common information is the same across the entire 160MHz band, and special information (e.g., PI) can be additionally transmitted to the 11be STA via a specific AID12 (2047) in the user information field. For example, the puncturing pattern of the 7th and 8th 20MHz segments can be indicated by 010.

[0199] Figure 21 This illustrates an implementation of a method for including special information in a user information field associated with a specific AID.

[0200] Reference Figure 21The puncturing pattern of the second 20MHz segment can be indicated by 010. The trigger frame may include a public information field and a user information field. The public information field may include an presence field (e.g., a specific AID presence field) related to whether the user information field includes special information. That is, the public information field may have an presence field indicating the presence of a specific AID12 (e.g., 2407) in the user information field. When the presence field includes information indicating the presence of a specific AID12 in the user information field, the user information field may include AID12 of special information (e.g., 2047). For example, the special information may include puncturing information (PI) and / or information related to the 320MHz bandwidth. For example, the special information may include information about STAs supporting 11be or post-11be standards. The value of AID12 related to the special information is not limited to the implementation and may have values ​​other than 2047 (e.g., 2007, etc.).

[0201] Figure 22 An implementation method for operating the STA is shown.

[0202] Reference Figure 22 STA operations can be based on references Figures 1 to 21 At least one of the described technical features.

[0203] The STA can receive a trigger frame (S2210). For example, the STA can receive a trigger frame from an access point (AP). For example, the trigger frame may include a public information field and a user information field. For example, the user information field may include a first field related to an association identifier (AID) and a second field including information about the STA related to the AID. For example, based on a specific value in the first field, the second field may include special information for all STAs that receive the trigger frame. For example, the public information field may include an presence field related to whether a user information field with a specific value exists in the first field of the user information field.

[0204] For example, the first field could be the AID12 field. For example, the second field could be a subfield of a user information field related to AID12.

[0205] For example, the public information field may include uplink transmission bandwidth information.

[0206] For example, specific information may include information related to the 320MHz uplink transmission bandwidth.

[0207] For example, special information may include punch information. The trigger frame may be sent through a punched channel based on the punch information.

[0208] For example, the punching information may include information related to whether punching is performed for each 20MHz unit frequency band.

[0209] For example, the punching information may include information related to an index corresponding to a preset punching pattern.

[0210] The STA can decode the trigger frame (S2220).

[0211] The STA can send trigger-based PPDUs (S2230). For example, the STA can send trigger-based PPDUs to the AP, and the trigger-based PPDUs can be sent using the frequency band based on punch information.

[0212] Figure 23 An implementation method for operating the AP is shown.

[0213] Reference Figure 23 AP operations can be based on references Figures 1 to 21 At least one of the described technical features.

[0214] The AP can send a trigger frame (S2310). For example, the AP can send a trigger frame to a station (STA).

[0215] For example, a trigger frame may include a public information field and a user information field. For example, the user information field may include a first field related to an associated identifier (AID) and a second field including information about the STA associated with the AID. For example, based on a specific value in the first field, the second field may include specific information about all STAs that receive the trigger frame. For example, the public information field may include an presence field related to whether a user information field with a specific value exists in the first field of the user information field.

[0216] For example, the first field could be the AID12 field. For example, the second field could be a subfield of a user information field related to AID12.

[0217] For example, the public information field may include uplink transmission bandwidth information.

[0218] For example, specific information may include information related to the 320MHz uplink transmission bandwidth.

[0219] For example, special information may include punch information. The trigger frame may be sent through a punched channel based on the punch information.

[0220] For example, the punching information may include information related to whether punching is performed for each 20MHz unit frequency band.

[0221] For example, the punching information may include information related to an index corresponding to a preset punching pattern.

[0222] The AP can receive trigger-based PPDUs (S2320). For example, the AP can receive trigger-based Physical Protocol Data Units (PPDUs) from the STA in response to a trigger frame.

[0223] Figure 22 and Figure 23 Some of the detailed steps shown in the examples may not be necessary and can be omitted. Besides... Figure 22 and Figure 23 Other steps may be added in addition to those shown, and the order of the steps may vary. Some of the steps described above may have independent technical meaning.

[0224] The technical features described above in this specification can be applied to various devices and methods. For example, the technical features described above in this specification can be applied through... Figure 1 and / or Figure 10 The device is used to perform / support this. For example, the technical features described above in this specification may only be applied to... Figure 1 and / or Figure 10 Part of it. For example, the above-described technical features of this specification may be based on Figure 1 This can be achieved using processing chips 114 and 124, or it can be based on... Figure 1 The processors 111 and 121 and the memories 112 and 122 are used to implement this, or it can be based on... Figure 10 The device is implemented using a processor 610 and a memory 620. For example, the apparatus of this specification includes: a memory; and a processor operatively connected to the memory. The processor may be configured to: receive a trigger frame from an access point (AP), wherein the trigger frame includes a common information field and a user information field, the user information field including a first field relating to an association identifier (AID) and a second field including information about STAs relating to the AID, the first field having a specific value, the second field including specific information about all STAs for receiving the trigger frame, and the common information field including an presence field relating to whether the user information field with the specific value exists in the first field of the user information field; and decode the trigger frame.

[0225] 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 having instructions executed by at least one processor of a transmitting station (STA) MLD of a WLAN system to perform operations including: receiving a trigger frame from an access point (AP), wherein the trigger frame includes a common information field and a user information field, the user information field including a first field related to an association identifier (AID) and a second field including information about the STA related to the AID, the first field having a specific value, the second field including specific information for all STAs receiving the trigger frame, and the common information field including an presence field related to whether the user information field with the specific value exists in the first field of the user information field; and decoding the trigger frame.

[0226] 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 can be... Figure 1 Processors 111 and 121 or processing chips 114 and 124 or Figure 10 The processor is 610. Furthermore, the CRM in this specification can be... Figure 1 The memory 112 and 122 or Figure 10 The memory 620 or a separate external memory / storage medium / disk, etc.

[0227] The technical features described above in this specification are applicable to various applications or business models. For example, these technical features can be applied to wireless communication in devices that support artificial intelligence (AI).

[0228] Artificial intelligence (AI) refers to the research field concerning artificial intelligence or the methods for creating AI, while machine learning refers to the research field concerning methods for defining and solving various problems within the field of AI. Machine learning is also defined as algorithms that improve operational performance through stable operational experience.

[0229] Artificial neural networks (ANNs) are models used in machine learning, and can refer to an overall problem-solving model comprising artificial neurons (nodes) that are combined by synapses to form a network. An artificial neural network can be defined by the connection pattern between neurons in different layers, the learning process that updates model parameters, and the activation function that generates output values.

[0230] An artificial neural network may include an input layer, an output layer, and optionally one or more hidden layers. Each layer includes one or more neurons, and the artificial neural network may include synapses connecting the neurons. In an artificial neural network, each neuron may output a function value of an activation function that takes input signals, weights, and biases as input through the synapse.

[0231] Model parameters refer to the parameters determined through learning, and include the weights of synaptic connections and the biases of neurons. Hyperparameters refer to the parameters set in a machine learning algorithm before learning, and include the learning rate, number of iterations, mini-batch size, and initialization function.

[0232] Learning artificial neural networks aims to determine the model parameters used to minimize the loss function. The loss function can be used as an index to determine the optimal model parameters during the learning process of artificial neural networks.

[0233] Machine learning can be classified into supervised learning, unsupervised learning, and reinforcement learning.

[0234] Supervised learning refers to the method of training an artificial neural network with labeled training data, where the labels indicate the correct answer (or result value) that the artificial neural network should infer when the training data is input. Unsupervised learning refers to the method of training an artificial neural network without labeled training data. Reinforcement learning refers to a training method that defines an agent in the training environment to select actions or action sequences to maximize the cumulative reward in each state.

[0235] Machine learning that utilizes deep neural networks (DNNs) with multiple hidden layers, including artificial neural networks, is called deep learning, and deep learning is a part of machine learning. In the following text, machine learning is interpreted as including deep learning.

[0236] The above-mentioned technical features can be applied to wireless communication of robots.

[0237] A robot can refer to a machine that automatically processes or operates a given task using its own capabilities. Specifically, a robot that has the ability to recognize its environment and autonomously make judgments to perform operations can be called an intelligent robot.

[0238] Robots can be classified according to their purpose or field, such as industrial, medical, household, and military robots. A robot may include actuators or drives, which include motors to perform various physical operations (e.g., moving robot joints). Additionally, mobile robots may include wheels, brakes, propellers, etc., in their drives to move on the ground or fly in the air.

[0239] The aforementioned technical features can be applied to devices that support extended reality.

[0240] Extended reality collectively refers to virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology is a computer graphics technology that provides real-world objects and backgrounds only in CG images; AR technology is a computer graphics technology that provides virtual CG images on top of real object images; and MR technology is a computer graphics technology that provides virtual objects that are mixed and combined with the real world.

[0241] The similarity between MR and AR technologies lies in the fact that real and virtual objects are displayed together. However, in AR, virtual objects serve as a complement to real objects, while in MR, virtual and real objects are displayed as equal entities.

[0242] XR technology can be applied to head-mounted displays (HMDs), head-up displays (HUDs), mobile phones, tablet PCs, laptops, desktop computers, TVs, digital signage, and more. Devices that utilize XR technology can be referred to as XR devices.

[0243] The claims set forth in this specification can be combined in various ways. For example, the technical features of the method claims can be combined to implement an apparatus, and the technical features of the apparatus claims can be combined to implement it by a method. Furthermore, the technical features of the method claims and the apparatus claims can be combined to implement an apparatus, and the technical features of the method claims and the apparatus claims can be combined to implement it by a method.

Claims

1. A method performed by a station (STA) in a wireless local area network (WLAN) system, the method comprising the following steps: Receive trigger frames from access point (AP) The trigger frame includes a public information field and a user information field. The public information field includes information regarding uplink bandwidth. The user information field includes the AID12 field, which is related to the associated identifier AID. The public information field includes an existence field related to the special information included in the user information field. The AID12 field has a specific value for the special information included in the user information field. The specific information includes bandwidth expansion information for wider bandwidths. In addition to the uplink bandwidth, the wider bandwidth is indicated based on the bandwidth extension information; and The trigger frame is decoded.

2. The method according to claim 1, wherein, The specific value is 2047.

3. The method according to claim 1, in, The specific information includes punching information, and The trigger frame is sent through a punched channel based on the punching information.

4. The method according to claim 3, further comprising the following steps: The STA sends a trigger-based Physical Protocol Data Unit (PPDU), wherein the trigger-based PPDU is transmitted using a frequency band based on the punch information.

5. The method according to claim 3, wherein, The punching information includes information related to whether punching is performed for each 20MHz unit frequency band.

6. The method according to claim 3, wherein, The punching information includes information related to an index corresponding to a preset punching pattern.

7. A station (STA) for a wireless local area network (WLAN) system, the STA comprising: A transceiver that transmits and receives radio signals; as well as A processor, connected to the transceiver, wherein the processor is configured to: Receive trigger frames from access point (AP) The trigger frame includes a public information field and a user information field. The public information field includes information regarding uplink bandwidth. The user information field includes the AID12 field, which is related to the associated identifier AID. The public information field includes an existence field related to the special information included in the user information field. The AID12 field has a specific value for the special information included in the user information field. The specific information includes bandwidth expansion information for wider bandwidths. In addition to the uplink bandwidth, the wider bandwidth is indicated based on the bandwidth extension information; and The trigger frame is decoded.

8. The STA according to claim 7, wherein, The processor is also configured to perform the steps of the method according to any one of claims 2 to 6.

9. A method performed by an access point (AP) of a wireless local area network (WLAN) system, the method comprising the following steps: Send a trigger frame to the STA. The trigger frame includes a public information field and a user information field. The public information field includes information regarding uplink bandwidth. The user information field includes the AID12 field, which is related to the associated identifier AID. The public information field includes an existence field related to the special information included in the user information field. The AID12 field has a specific value for the special information included in the user information field. The specific information includes bandwidth expansion information for wider bandwidths. In addition to the uplink bandwidth, the wider bandwidth is indicated based on the bandwidth extension information; and In response to the trigger frame, a trigger-based Physical Protocol Data Unit (PPDU) is received from the STA.

10. The method according to claim 9, wherein, The AP is also configured to perform the steps of the method according to any one of claims 2 to 6.

11. An access point (AP) used in a wireless local area network (WLAN) system, the AP comprising: The processor is configured as follows: Send a trigger frame to the STA. The trigger frame includes a public information field and a user information field. The public information field includes information regarding uplink bandwidth. The user information field includes the AID12 field, which is related to the associated identifier AID. The public information field includes an existence field related to the special information included in the user information field. The AID12 field has a specific value for the special information included in the user information field. The specific information includes bandwidth expansion information for wider bandwidths. In addition to the uplink bandwidth, the wider bandwidth is indicated based on the bandwidth extension information; and In response to the trigger frame, a trigger-based Physical Protocol Data Unit (PPDU) is received from the STA.

12. At least one computer-readable medium having instructions that are executed by at least one processor of a station (STA) of a wireless local area network (WLAN) system to perform operations, the operations including: Receive trigger frames from access point (AP) The trigger frame includes a public information field and a user information field. The public information field includes information regarding uplink bandwidth. The user information field includes the AID12 field, which is related to the associated identifier AID. The public information field includes the existence field related to special information in the user information field. The AID12 field has a specific value for the special information included in the user information field. The specific information includes bandwidth expansion information for wider bandwidths. In addition to the uplink bandwidth, the wider bandwidth is indicated based on the bandwidth extension information; and The trigger frame is decoded.

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