Method and apparatus for requesting trigger-based physical layer protocol data unit transmission in a wireless LAN

Abstract

An embodiment of the present invention provides a method and apparatus for requesting a physical layer protocol data unit transmission based on a trigger in a wireless LAN. The method for requesting a TB PPDU transmission comprises generating a trigger frame at an access point based on the type of TB PPDU transmission requested by multiple stations in the WLAN, where the type of TB PPDU transmission includes high-efficiency TB PPDU transmission, very high-throughput TB PPDU transmission, or TB frequency-domain aggregation PPDU transmission, one or two subfields in the trigger frame indicating the bandwidth of the requested TB PPDU, and transmitting the generated trigger frame to multiple STAs via the AP. According to the method and apparatus of the embodiment of the present invention, the generated trigger frame can indicate the bandwidth of the requested TB PPDU in the WLAN.

Description

【Technical Field】 【0001】 Cross - reference to related applications This application claims priority based on Singapore Patent Application No. 10202012038U named "Enhancing the trigger frame for IEEE 802.11be EHT WLAN" filed on December 2, 2020, and all of it is incorporated herein by reference. 【0002】 The present invention relates to wireless communication, and more particularly, to a method and apparatus for requesting trigger (TB) - based physical layer protocol data unit (PPDU) transmission in a wireless local area network (WLAN) using a trigger frame. 【Background Art】 【0003】 The Institute of Electrical and Electronics Engineers (IEEE) 802.11be Extremely High Throughput (EHT) WLAN supports bandwidth (BW) up to 320 MHz. High - Efficiency (HE) stations (STAs) are expected to exist in the same EHT basic service set (BSS) as EHT STAs. To maximize the throughput of an EHT BSS with a large BW (e.g., 160 MHz or 320 MHz), frequency - domain aggregation physical layer protocol data unit (FD - A - PDU) has been proposed. In IEEE 802.11be EHT WLAN, a trigger frame can be used to request HE TB PPDU transmission, EHT TB PPDU transmission, or TB FD - A - PDU transmission. However, enhancing the 802.11ax trigger frame to achieve this goal is an outstanding problem. 【Summary of the Invention】 【0004】 Embodiments of the present invention provide a method and apparatus for requesting TB PPDU transmission using a trigger frame in a WLAN. 【0005】 In a first aspect of the present invention, an embodiment of the present invention provides a method for requesting TB PPDU transmission in a WLAN. The method is performed by an access point (AP) in the WLAN, and the method includes the AP generating a trigger frame based on the type of TB PPDU transmission requested by a plurality of stations (STAs) in the WLAN, wherein the type of TB PPDU transmission includes high-efficiency (HE) TB PPDU transmission, extremely high-throughput (EHT) TB PPDU transmission, or TB frequency domain aggregation PPDU (FD-A-PPDU) transmission, and one or two subfields in the trigger frame indicate the bandwidth (BW) of the requested TB PPDU, and the AP transmitting the generated trigger frame to the plurality of STAs. 【0006】 In a second aspect of the present invention, an embodiment of the present invention provides a method for requesting TB PPDU transmission in a WLAN. The method is carried out by an STA in the WLAN, the method receiving a trigger frame requesting one type of TB PPDU transmission from a plurality of STAs in the WLAN, wherein the type of TB PPDU transmission includes high-efficiency (HE) TB PPDU transmission, extremely high-throughput (EHT) TB PPDU transmission, or TB frequency domain aggregation PPDU (FD-A-PPDU) transmission, and one or two subfields in the trigger frame indicate the bandwidth (BW) of the requested TB PPDU, and the STA transmits the requested TB PPDU in the BW indicated by one or two subfields in the trigger frame. 【0007】 In a third aspect of the present invention, an embodiment of the present invention provides an AP that requests TB PPDU transmission in a WLAN. The AP includes a generation unit and a first transmission unit, the generation unit configured to generate a trigger frame based on the type of TB PPDU transmission requested by a plurality of stations (STAs) in the WLAN, wherein the type of TB PPDU transmission includes high-efficiency (HE) TB PPDU transmission, extremely high-throughput (EHT) TB PPDU transmission, or TB frequency domain aggregation PPDU (FD-A-PPDU) transmission, and one or two subfields in the trigger frame indicate the bandwidth (BW) of the requested TB PPDU, and the first transmission unit is configured to transmit the generated trigger frame to the plurality of STAs. 【0008】 In a fourth aspect of the present invention, an embodiment of the present invention provides an STA that requests TB PPDU transmission in a WLAN. The STA includes a receiving unit and a second transmission unit, the receiving unit configured to receive a trigger frame for requesting one type of TB PPDU transmission from a plurality of STAs in a WLAN, wherein the type of TB PPDU transmission includes high-efficiency (HE) TB PPDU transmission, extremely high-throughput (EHT) TB PPDU transmission, or TB frequency domain aggregation PPDU (FD-A-PPDU) transmission, and one or two subfields in the trigger frame indicate the bandwidth (BW) of the requested TB PPDU, and the second transmission unit is configured to transmit the requested TB PPDU in the BW indicated by one or two subfields in the trigger frame. 【0009】 A fifth aspect of the present invention provides an AP for requesting TB PPDU transmission in a WLAN. The AP includes a memory and a processor, the memory storing instructions for requesting TB PPDU transmission in the WLAN, the processor being communicatively connected to the memory and executing the instructions to generate a trigger frame based on the type of TB PPDU transmission requested by the AP from multiple stations (STAs) in the WLAN, wherein the type of TB PPDU transmission includes high-efficiency (HE) TB PPDU transmission, extremely high-throughput (EHT) TB PPDU transmission, or TB frequency domain aggregation PPDU (FD-A-PPDU) transmission, and one or two subfields in the trigger frame indicate the bandwidth (BW) of the requested TB PPDU, and the AP transmits the generated trigger frame to the multiple STAs. 【0010】 In a sixth aspect of the present invention, an embodiment of the present invention provides an STA for requesting TB PPDU transmission in a WLAN. The STA includes a memory and a processor, the memory storing instructions for requesting TB PPDU transmission in a WLAN, the processor being communicatively connected to the memory and executing the instructions to receive a trigger frame in which the STA requests one type of TB PPDU transmission from multiple STAs in a WLAN, wherein the type of TB PPDU transmission includes high-efficiency (HE) TB PPDU transmission, extremely high-throughput (EHT) TB PPDU transmission, or TB frequency domain aggregation PPDU (FD-A-PPDU) transmission, one or two subfields in the trigger frame indicating the bandwidth (BW) of the requested TB PPDU, and the requested TB PPDU is transmitted in the BW indicated by one or two subfields in the trigger frame. 【0011】 According to a seventh aspect of the present invention, an embodiment of the present invention provides a computer program product. The computer program product includes an instruction that, when the instruction is executed on a computer, causes the computer to perform a method for requesting TB PPDU transmission in a WLAN as described in any embodiment of the present invention. 【0012】 According to an eighth aspect of the present invention, an embodiment of the present invention provides a computer program. The computer program includes an instruction that, when the instruction is executed on the computer, causes the computer to perform a method for requesting TB PPDU transmission in a WLAN as described in any embodiment of the present invention. 【0013】 In a ninth aspect of the present invention, an embodiment of the present invention provides a non-volatile storage medium. This non-volatile storage medium includes the computer program code that causes a computer to execute a method for requesting TB PPDU transmission in a WLAN as described in any embodiment of the present invention. 【0014】 In a tenth aspect of the present invention, an embodiment of the present invention provides a chip that causes a computer to perform a method for requesting TB PPDU transmission in a WLAN as described in any embodiment of the present invention. [Brief explanation of the drawing] 【0015】 The present invention will be described in detail with reference to the drawings. [Figure 1] This is a schematic diagram of uplink multi-user (MU) transmission in one embodiment of the present invention. [Figure 2A] This is a block diagram of the HE TB PPDU format. [Figure 2B] This is a block diagram of the EHT TB PPDU format. [Figure 3] This is a 160MHz BW allocation for TB FD-A-PPDU transmission in one embodiment of the present invention. [Figure 4A]This is an option for 320 MHz bandwidth allocation for TB FD-A-PPDU transmission in one embodiment of the present invention. [Figure 4B] This is another option for 320MHz BW allocation for TB FD-A-PPDU transmission in one embodiment of the present invention. [Figure 4C] This is another option for 320MHz BW allocation for TB FD-A-PPDU transmission in one embodiment of the present invention. [Figure 4D] This is another option for 320MHz BW allocation for TB FD-A-PPDU transmission in one embodiment of the present invention. [Figure 4E] This is another option for 320MHz BW allocation for TB FD-A-PPDU transmission in one embodiment of the present invention. [Figure 5A] This is a schematic diagram of an example trigger frame requesting HE TB PPDU transmission in a WLAN. [Figure 5B] This is a schematic diagram of an example trigger frame requesting EHT TB PPDU transmission in a WLAN. [Figure 5C] This is a schematic diagram of an example trigger frame requesting TB FD-A-PPDU transmission in a WLAN. [Figure 6A] This is a block diagram of the trigger frame format in one embodiment of the present invention. [Figure 6B] This is a block diagram of an example of the user information field format of a trigger frame in one embodiment of the present invention. [Figure 7] This is a block diagram of an example of the common information field format for a trigger frame in the first embodiment. [Figure 8] This is a block diagram of an example of the common information field format for a trigger frame in the second embodiment. [Figure 9] This is a block diagram of an example of the common information field format for a trigger frame in the third embodiment. [Figure 10]A flowchart of a method for requesting TB PPDU transmission in a WLAN implemented by an AP in an embodiment of the present invention. [Figure 11] A flowchart of a method for requesting TB PPDU transmission in a WLAN implemented by a STA in an embodiment of the present invention. [Figure 12A] A schematic diagram of an AP that requests TB PPDU transmission in a WLAN in an embodiment of the present invention. [Figure 12B] A schematic diagram of an AP that requests TB PPDU transmission in a WLAN in an embodiment of the present invention. [Figure 13A] A schematic diagram of a STA that requests TB PPDU transmission in a WLAN in an embodiment of the present invention. [Figure 13B] A schematic diagram of a STA that requests TB PPDU transmission in a WLAN in an embodiment of the present invention. 【Embodiments for Carrying Out the Invention】 【0016】 Hereinafter, the technical content, structural features, achieved objectives, and effects of the embodiments of the present invention will be described in detail with reference to the drawings. Specifically, the terms in the embodiments of the present invention are used only for describing specific embodiments and are not used for limiting the present invention. 【0017】 The method and apparatus for requesting TB PPDU transmission using a trigger frame in the WLAN of the present invention may also be understood as a method and apparatus for transmitting TB PPDU transmission in a WLAN. Although this is a general overview of the present invention, it does not limit the specific features of the AP or STA when executing this method. 【0018】 This is a schematic diagram illustrating uplink multi-user (MU) transmission according to one embodiment of the present invention. When an AP receives a trigger frame requesting TB FD-A-PDU transmission from the HE STA and EHT STA, each scheduled HE STA and EHT STA transmits a TB PPDU based on the scheduling information in the received trigger frame. The TB PPDU transmitted by each scheduled HE STA is an HE TB PPDU, and the TB PPDU transmitted by each scheduled EHT STA is either an HE TB PPDU or an EHT TB PPDU. 【0019】 Multiple HE TB PPDUs transmitted over non-overlapping frequency-domain resources and / or spatial-domain resources of different STAs on 20 / 40 / 80 / 160 / 320MHz channels can be considered as a single HE TB PPDU. Similarly, multiple EHT TB PPDUs transmitted over non-overlapping frequency-domain resources and / or spatial-domain resources of different STAs on 20 / 40 / 80 / 160 / 320MHz channels can be considered as a single EHT TB PPDU. HE TB PPDUs and EHT TB PPDUs transmitted over all scheduled HE STAs and EHT STAs constitute a TB FD-A-PDU. In response to a received TB FD-A-PDU, the AP transmits a Multi-STA BlockAck (Multi-STA BA) frame. 【0020】 Figure 2A is a block diagram showing the format of HE TB PPDU, and Figure 2B is a block diagram showing the format of EHT TB PPDU. In HE TB PPDU, the non-HT short training field (L-STF), non-HT long training field (L-LTF), non-HT signal field (L-SIG), repetitive L-SIG field (RL-SIG), and HE signal field (HE-SIG-A) are called preliminary HE modulation fields, and the HE short training field (HE-STF), HE long training field (HE-LTF), data field, and packet extension (PE) field are called HE modulation fields. In EHT TB PPDU, the L-STF, L-LTF, L-SIG field, RL-SIG field, and U-SIG field are called preliminary EHT modulation fields, and the EHT short training field (EHT-STF), EHT long training field (EHT-LTF), data field, and PE field are called EHT modulation fields. 【0021】 Each HE-LTF or EHT-LTF symbol has the same protection interval (GI) duration as each data symbol, which is 0.8 μs, 1.6 μs, or 3.2 μs. HE-LTF fields include three types: 1xHE-LTF, 2xHE-LTF, and 4xHE-LTF. Similarly, EHT-LTF fields include three types: 1xEHT-LTF, 2xEHT-LTF, and 4xEHT-LTF. The duration of each 1xHE-LTF / EHT-LTF, 2xHE-LTF / EHT-LTF, or 4xHE-LTF / EHT-LTF symbol without GI is 3.2 μs, 6.4 μs, or 12.8 μs. Each data symbol without GI has a duration of 12.8 μs. The duration of the PE field for HE TB PPDU is 0 μs, 4 μs, 8 μs, 12 μs, or 16 μs, and the duration of the PE field for EHT TB PPDU is 0 μs, 4 μs, 8 μs, 12 μs, 16 μs, or 20 μs. 【0022】 According to the present invention, in an EHT BSS having a large BW (e.g., 160 MHz or 320 MHz), if the HE-LTF field has the same symbol duration and GI duration as the EHT-LTF field, the TB FD-A-PDU for uplink MU transmission may include one HE TB PPDU and one or two EHT TB PPDUs. 【0023】 The number of HE-LTF symbols may be the same as or different from the number of EHT-LTF symbols. If the number of HE-LTF symbols is the same as the number of EHT-LTF symbols, each HE-LTF / EHT-LTF symbol may have a different duration or the same duration as each data symbol. In other words, each HE-LTF / EHT-LTF symbol without GI may have a duration of 6.4 μs or 12.8 μs. If the number of HE-LTF symbols and EHT-LTF symbols are different, the duration of each HE-LTF / EHT-LTF symbol must be the same as that of each data symbol. In other words, each HE-LTF / EHT-LTF symbol without GI must have a duration of 12.8 μs. Therefore, the pre-HE modulation field of the HE MU PPDU and the pre-EHT modulation field of the EHT MU PPDU may be orthogonal to each symbol in the frequency domain. 【0024】 In the case of uplink MU transmission, each scheduled HE STA can reside in the primary 80MHz channel (P80), and each scheduled EHT STA can reside in one of the non-primary 80MHz channels by the enhanced selective subchannel transmission (SST) mechanism. The non-primary 80MHz channels are secondary 80MHz channels in the 80MHz band other than P80, for example, the 160MHz or 320MHz channels (S80). 【0025】 According to the present invention, in a 160MHz BW TB FD-A-PDU, the BW assigned to the HE STA is P80, and the BW assigned to the EHT STA is S80. In this case, one HE TB PPDU can be transmitted on P80, and one EHT TB PPDU can be transmitted on S80. Figure 3 shows the 160MHz BW assignment for TB FD-A-PDU transmission according to one embodiment of the present invention. 【0026】 According to the present invention, in a 320MHz BW TB FD-A-PDU, the BW assigned to HE STA is P80 or the main 160MHz channel (P160), and the BW assigned to EHT STA is one of the two 80MHz frequency bands of the secondary 160MHz channel (S160), one of the two 80MHz frequency bands of S160, S80, or S160, or a combination of S80 and S160. 【0027】 For a 320MHz BW FD-A-PDU, the BW allocation in a TB FD-A-PDU includes the following five options: 【0028】 Option 1A: As shown in Figure 4A, when S80 is punctured, the BW assigned to the HE STA is P80, and the BW assigned to the EHT STA is S160. One HE TB PPDU can be transmitted on P80, and one EHT TB PPDU can be transmitted on S160. 【0029】 Option 1B: As shown in Figure 4B, if one of the two 80MHz bands of S160 is punctured, the band assigned to the HE STA is P160, and the band assigned to the EHT STA is the other 80MHz band of S160. One HE TB PPDU can be transmitted in P160, and one EHT TB PPDU can be transmitted in the uncropped 80MHz band of S160. 【0030】 Option 1C: As shown in Figure 4C, if one of the two 80MHz bands of S160 is punctured, the band assigned to the HE STA is P80, and the bands assigned to the EHT STA are the other 80MHz bands of S80 and S160. One HE TB PPDU can be transmitted on P80, and two EHT TB PPDUs can be transmitted on the uncropped 80MHz bands of S80 and S160, respectively. 【0031】 Option 1D: As shown in Figure 4D, if the entire 80MHz bandwidth is not punctured, the bandwidth assigned to the HE STA is P160 and the bandwidth assigned to the EHT STA is S160. One HE TB PPDU can be transmitted at P160 and one EHT TB PPDU can be transmitted at S160. 【0032】 Option 1E: As shown in Figure 4E, if the entire 80MHz bandwidth is not punctured, the bandwidth assigned to the HE STA is P80, and the bandwidths assigned to the EHT STA are S80 and S160. One HE TB PPDU can be transmitted on P80, and one EHT TB PPDU can be transmitted on S80 and S160. 【0033】 In an IEEE 802.11be EHT WLAN, a trigger frame can be used to request HE TB PPDU transmission from an HE STA, EHT TB PPDU transmission from an EHT STA, or TB FD-A-PDU transmission from both an HE STA and an EHT STA. However, the TB PPDU transmitted by each scheduled HE STA is an HE TB PPDU, and the TB PPDU transmitted by each scheduled EHT STA is either an HE TB PPDU or an EHT TB PPDU. Figure 5A is a schematic example of a trigger frame requesting HE TB PPDU transmission from two HE STAs in a WLAN. Figure 5B is a schematic example of a trigger frame requesting EHT TB PPDU transmission from two EHT STAs in a WLAN. Figure 5C is a schematic example of a trigger frame requesting TB FD-A-PDU transmission from one HE STA and one EHT STA in a WLAN. 【0034】 Figure 6A is a block diagram of a trigger frame format in one embodiment of the present invention. The trigger frame format shown in Figure 6A includes a common information field and a user information list field containing one or more user information fields. The format of the common information field and the user information field depends on the type of trigger frame. 【0035】 Figure 6B is a block diagram of an example of the user information field format of a trigger frame according to one embodiment of the present invention. The HE / EHT format subfield of the user information field indicates whether the user information field follows the 802.11axHE format or the 802.11be EHT format. The value of the HE / EHT format subfield of the user information field determines how the other subfields of the user information field are interpreted. The HE / EHT format subfield of the user information field is set to 0 to indicate the 802.11axHE format and to 1 to indicate the 802.11be EHT format. When the HE / EHT format subfield of the user information field is set to indicate the 802.11axHE format, the low / high 160MHz bandwidth subfield is reserved, and the RU allocation subfield indicates that the STA indicated by the AID 12 subfield is transmitting a resource unit (RU) of HE TBPPDU. If the HE / EHT format subfield of the user information field is set to indicate the 802.11be EHT format, the RU allocation subfield and the low / high 160MHz bandwidth subfield indicate a RU or multiple resource units (MRU), and the STA indicated by the AID 12 subfield transmits the EHT TB PPDU within the RU or MRU. 【0036】 Figure 10 is a flowchart of Method 130 for requesting TB PPDU transmission in a WLAN implemented by an AP in one embodiment of the present invention. In the embodiment of the present invention, Method 130 is implemented by an AP. In other embodiments, Method 130 can be implemented by any other suitable network interface device. 【0037】 In block 1301, the AP generates a trigger frame based on the type of PPDU transmission requested by multiple STAs in the WLAN (e.g., HE STA and / or EHT STA). The type of PPDU transmission includes HE TB PPDU transmission, EHT TB PPDU transmission, or FD-A-PPDU transmission, and one or two subfields in the trigger frame (e.g., UL BW subfield, UL BW subfield and Delta EHT UL BW, or UL BW subfield and UL BW extended subfield) indicate the BW of the requested TB PPDU. 【0038】 In block 1302, the generated trigger frame is transmitted to multiple STAs. 【0039】 In one embodiment, the common information field of the trigger frame includes a UL BW subfield indicating the BW of the requested HE TB PPDU. 【0040】 In one embodiment, the UL BW subfield occupies 2 bits in the common information field of the trigger frame. 【0041】 In one embodiment, the required BW of the HE TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 / 80+80 MHz. 【0042】 In one embodiment, the BW of the requested HE TB PPDU, indicated by the UL BW subfield in the common information field of the trigger frame, is located in the HE SIGNALA (HE SIG-A) field of the requested HE TB PPDU. 【0043】 In one embodiment, the common information field of the trigger frame further includes an enhanced trigger frame flag subfield used to indicate whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame. 【0044】 In one embodiment, the enhanced trigger frame includes a common information field and a user information list field that includes one or more user information fields. 【0045】 In one embodiment, if the Enhanced Trigger Frame Flag subfield indicates that the trigger frame is an enhanced trigger frame, then both the UL BW subfield and the Delta EHT UL BW subfield indicate the BW of the required EHT TB PPDU. 【0046】 In one embodiment, the BW of the requested EHT TB PPDU, as indicated by both the UL BW subfield and the Delta EHT UL BW subfield, is located in the Common SIGNAL (U-SIG) field of the requested EHT TB PPDU. 【0047】 In one embodiment, the Delta EHT UL BW subfield occupies two bits of the enhanced trigger frame. 【0048】 In one embodiment, the required BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. 【0049】 In one embodiment, if the required BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, the required BW of the EHT TB PPDU is the same as the required BW of the HE TB PPDU. 【0050】 In one embodiment, if the BW of the requested EHT TB PPDU is 40 MHz, 80 MHz, 160 MHz, or 320 MHz, the BW of the requested EHT TB PPDU is the next available BW that is greater than the BW of the requested HE TB PPDU. 【0051】 In one embodiment, if the required EHT TB PPDU BW is 20 MHz, 40 MHz, or 80 MHz, the required EHT TB PPDU BW is the next available BW which is smaller than the required HE TB PPDU BW. 【0052】 In other embodiments, if the Enhanced Trigger Frame Flag subfield indicates that the trigger frame is an enhanced trigger frame, both the UL BW subfield and the UL BW Extension subfield indicate the BW of the requested EHT TB PPDU. 【0053】 In this embodiment, the BW of the requested EHT TB PPDU, as indicated by both the UL BW subfield and the UL BW extended subfield, is located in the Common SIGNAL (U-SIG) field of the requested EHT TB PPDU. 【0054】 In this embodiment, the required BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. 【0055】 In this embodiment, if the BW of the requested EHT TB PPDU is 40 MHz, 80 MHz, 160 MHz, or 320 MHz, the BW of the requested EHT TB PPDU is the next available BW that is greater than the BW of the requested HE TB PPDU. 【0056】 In this embodiment, if the BW of the requested EHT TB PPDU is 20 MHz, 40 MHz, or 80 MHz, the BW of the requested EHT TB PPDU is the next available BW which is smaller than the BW of the requested HE TB PPDU. 【0057】 Figure 11 is a flowchart of Method 140 for requesting TB PPDU transmission in a WLAN, implemented by an STA in one embodiment of the present invention. In embodiments of the present invention, Method 140 is implemented by an STA. In other embodiments, Method 140 can be implemented by any other suitable client device. 【0058】 In block 1401, a trigger frame from the AP is received by an STA (e.g., HE STA and / or EHT STA), and the trigger frame is generated based on the type of PPDU transmission requested by multiple STAs (e.g., HE STA and / or EHT STA). The type of PPDU transmission includes HE TB PPDU transmission, EHT TB PPDU transmission, or FD-A-PPDU transmission, and one or two subfields in the trigger frame (e.g., UL BW subfield, UL BW subfield and Delta EHT UL BW, or UL BW subfield and UL BW extended subfield) indicate the BW of the requested TB PPDU. 【0059】 In block 1402, the requested TB PPDU is transmitted via STA in the BW indicated by one or two subfields in the trigger frame. 【0060】 In one embodiment, the common information field of the trigger frame includes a UL BW subfield indicating the BW of the requested HE TB PPDU. 【0061】 In one embodiment, the UL BW subfield occupies 2 bits in the common information field of the trigger frame. 【0062】 In one embodiment, the required BW of the HE TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 / 80+80 MHz. 【0063】 In one embodiment, the BW of the requested HE TB PPDU, indicated by the UL BW subfield in the common information field of the trigger frame, is located in the HE SIGNALA (HE SIG-A) field of the requested HE TB PPDU. 【0064】 In one embodiment, the common information field of the trigger frame further includes an enhanced trigger frame flag subfield used to indicate whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame. 【0065】 In one embodiment, the enhanced trigger frame includes a common information field and a user information list field that includes one or more user information fields. 【0066】 In one embodiment, if the Enhanced Trigger Frame Flag subfield indicates that the trigger frame is an enhanced trigger frame, then both the UL BW subfield and the Delta EHT UL BW subfield indicate the BW of the required EHT TB PPDU. 【0067】 In one embodiment, the BW of the requested EHT TB PPDU, as indicated by both the UL BW subfield and the Delta EHT UL BW subfield, is located in the Common SIGNAL (U-SIG) field of the requested EHT TB PPDU. 【0068】 In one embodiment, the Delta EHT UL BW subfield occupies two bits of the enhanced trigger frame. 【0069】 In one embodiment, the required BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. 【0070】 In one embodiment, if the required BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, the required BW of the EHT TB PPDU is the same as the required BW of the HE TB PPDU. 【0071】 In one embodiment, if the BW of the requested EHT TB PPDU is 40 MHz, 80 MHz, 160 MHz, or 320 MHz, the BW of the requested EHT TB PPDU is the next available BW that is greater than the BW of the requested HE TB PPDU. 【0072】 In one embodiment, if the required EHT TB PPDU BW is 20 MHz, 40 MHz, or 80 MHz, the required EHT TB PPDU BW is the next available BW which is smaller than the required HE TB PPDU BW. 【0073】 In other embodiments, if the Enhanced Trigger Frame Flag subfield indicates that the trigger frame is an enhanced trigger frame, then both the UL BW subfield and the UL BW Extension subfield indicate the BW of the requested EHT TB PPDU. 【0074】 In this embodiment, the BW of the requested EHT TB PPDU, as indicated by both the UL BW subfield and the UL BW extended subfield, is located in the Common SIGNAL (U-SIG) field of the requested EHT TB PPDU. 【0075】 In this embodiment, the required BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. 【0076】 In this embodiment, if the required BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, the required BW of the EHT TB PPDU is the same as the required BW of the HE TB PPDU. 【0077】 In this embodiment, if the BW of the requested EHT TB PPDU is 40 MHz, 80 MHz, 160 MHz, or 320 MHz, the BW of the requested EHT TB PPDU is the next available BW that is greater than the BW of the requested HE TB PPDU. 【0078】 In this embodiment, if the BW of the requested EHT TB PPDU is 20 MHz, 40 MHz, or 80 MHz, the BW of the requested EHT TB PPDU is the next available BW which is smaller than the BW of the requested HE TB PPDU. 【0079】 Figure 12A is a schematic diagram of AP1500A requesting TB PPDU transmission in a WLAN in one embodiment of the present invention. In this embodiment, AP1500A includes a generation unit 1501a and a first transmission unit 1502b. The generation unit 1501a is configured to generate a trigger frame based on the type of TB PPDU transmission requested by a plurality of STAs (e.g., HE STA and / or EHT STA) in the WLAN. The types of TB PPDU transmission include HE TB PPDU transmission, EHT TB PPDU transmission, or TB FD-A-PPDU transmission, and one or two subfields in the trigger frame (e.g., UL BW subfield, UL BW subfield and Delta EHT UL BW, or UL BW subfield and UL BW extended subfield) indicate the BW of the requested TB PPDU. The first transmission unit 1502b is configured to transmit the requested TB PPDU in the BW indicated by one or two subfields in the trigger frame. 【0080】 Figure 12B is a schematic diagram of AP1500B requesting TB PPDU transmission in a WLAN in one embodiment of the present invention. AP1500B includes memory 1501b and processor 1502b. Memory 1501b stores instructions requesting TB PPDU transmission in a WLAN, and processor 1502b is communicated to memory. Processor 1502b executes the instructions and performs the method by which AP1500B requests TB PPDU transmission in a WLAN in an embodiment of the present invention, such as the method shown in Figure 10. 【0081】 Figure 13A is a schematic diagram of an STA1600A requesting TB PPDU transmission in a WLAN in one embodiment of the present invention. In this embodiment, the STA1600A includes a receiving unit 1601a and a second transmission unit 1602b. The receiving unit 1601a is configured to receive trigger frames requesting one type of TB PPDU transmission from multiple STAs in the WLAN (e.g., multiple HE STAs and / or multiple EHT STAs). The type of TB PPDU transmission includes HE TB PPDU transmission, EHT TB PPDU transmission, or TB FD-A-PPDU transmission, and one or two subfields in the trigger frame (e.g., UL BW subfield, UL BW subfield and Delta EHT UL BW, or UL BW subfield and UL BW extended subfield) indicate the bandwidth (BW) of the requested TB PPDU. The second transmission unit 1602b is configured to transmit the requested TB PPDU in the BW indicated by one or two subfields in the trigger frame. 【0082】 Figure 13B is a schematic diagram of STA1600B requesting TB PPDU transmission in a WLAN in one embodiment of the present invention. STA1600B includes memory 1601b and processor 1602b. Memory 1601b stores instructions requesting TB PPDU transmission in a WLAN, and processor 1602b is communicated to memory. Processor 1602b executes the instructions to perform the method by which STA1600B requests TB PPDU transmission in a WLAN in an embodiment of the present invention, such as the method shown in Figure 11. 【0083】 Figure 7 is a block diagram of an example of the common information field format for a trigger frame in the first embodiment. The Enhanced Trigger Frame Flag subfield indicates whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame. The Enhanced Trigger Frame Flag subfield is set to 0 to indicate an 802.11ax trigger frame and to 1 to indicate an enhanced trigger frame. When the Enhanced Trigger Frame Flag subfield is set to indicate an 802.11ax trigger frame, the UL BW Extension subfield is reserved, and the UL BW subfield indicates the BW in the HE-SIG-A field of the requested HE TB PPDU, which is 20MHz, 40MHz, 80MHz, or 160 / 80+80MHz. When the Enhanced Trigger Frame Flag subfield is set to indicate an enhanced trigger frame, both the UL BW subfield and the UL BW Extension subfield indicate the BW in the U-SIG of the requested EHT TB PPDU, which is 20MHz, 40MHz, 80MHz, 160MHz, or 320MHz. 【0084】 A trigger frame having the common information field shown in Figure 7 can be used to request HE TB PPDU transmission from an HE STA or EHT TB PPDU transmission from an EHT STA. For example, if the trigger frame is used to request a 160MHz HE TB PPDU transmission from an HE STA, the Enhanced Trigger Frame Flag subfield of the Common Information field is set to indicate an 802.11ax trigger frame, and the UL BW subfield is set to indicate a 160 / 80+80MHz BW. Similarly, if the trigger frame is used to request a 320MHz EHT TB PPDU transmission from an EHT STA, the Enhanced Trigger Frame Flag subfield is set to indicate an Enhanced Trigger Frame, and both the UL BW subfield and the UL BW Extension subfield are set to indicate a 320MHz BW. 【0085】 The trigger frame having the common information field shown in Figure 7 may also be used to request TB FD-A-PDU transmission from HE STA and EHT STA, where the requested TB FD-A-PDU includes one HE TB PPDU and one or two EHT TB PPDUs. In this case, the Enhanced Trigger Frame Flag subfield is set to indicate an enhanced trigger frame, the UL BW Extension subfield is set to 0, and the UL BW subfield indicates the BW in the HE-SIG-A field of one HE TB PPDU, which is the same as the BW in the U-SIG field of one or two EHT TB PPDUs. The UL BW subfield of the common information field of the trigger frame can be set to indicate half the BW of the requested TB FD-A-PDU. For example, if the trigger frame is used to request 160MHz BW TB FD-A-PDU transmission, the UL BW subfield is set to indicate 80MHz. Furthermore, for example, if a trigger frame is used to request a 320MHz BW TB FD-A-PDU transmission, the UL BW subfield is set to indicate 160MHz. However, such processing results in the BW of a 320MHz BW TB FD-A-PDU containing one HE TB PPDU and one or two EHT TB PPDUs being assigned options 1A, 1B, or 1E, the BW in the HE-SIG-A field of one HE TB PPDU being different from the assigned BW, and the BW in the U-SIG fields of one or two EHT TB PPDUs being different from the assigned BW, respectively. 【0086】 Figure 8 is a block diagram showing an example of the common information field format for a trigger frame according to the second embodiment. The Enhanced Trigger Frame Flag subfield indicates whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame. The Enhanced Trigger Frame Flag subfield is set to 0 to indicate an 802.11ax trigger frame and to 1 to indicate an enhanced trigger frame. When the Enhanced Trigger Frame Flag subfield is set to indicate an 802.11ax trigger frame, the EHT UL BW extension subfield is reserved, and the UL BW subfield indicates the BW in the HE-SIG-A field of the requested HE TB PPDU. If the Enhanced Trigger Frame Flag subfield is set to indicate an enhanced trigger frame, the UL BW subfield indicates the BW in the HE-SIG-A field of one HE TB PPDU in the requested TB FD-A-PDU, and the EHT UL BW subfield indicates the BW in the U-SIG field of the requested EHT TB PPDU or the BW in the U-SIG fields of one or two EHT TB PPDUs in the requested TB FD-A-PDU. 【0087】 A trigger frame having the common information fields shown in Figure 8 can be used to request HE TB PPDU transmission from an HE STA, EHT TB PPDU transmission from an EHT STA, or TB FD-A-PDU transmission from both an HE STA and an EHT STA. For example, if the trigger frame is used to request a 160MHz HE TBPPDU transmission from an HE STA, the Enhanced Trigger Frame Flag subfield is set to indicate an 802.11ax trigger frame, and the UL BW subfield is set to indicate a 160 / 80+80MHz BW. Similarly, if the trigger frame is used to request a 320MHz EHT TB PPDU transmission from an EHT STA, the Enhanced Trigger Frame Flag subfield is set to indicate an Enhanced Trigger Frame, and the EHT UL BW subfield is set to indicate a 320MHz BW. When a trigger frame is used to request FD-A-PDU transmission from HE STA and EHT STA, the Enhanced Trigger Frame Flag subfield is set to indicate an enhanced trigger frame, and the values ​​of the UL BW subfield and EHT UL BW subfield are set based on the BW and BW allocation of the requested TB FD-A-PDU, as shown in Table 9. 【0088】 [Table 1] 【0089】 As can be seen from Table 9, for BW assignment option 1A of the 320MHz BW TB FD-A-PDU, the BW assigned to one HE TB PPDU is 80MHz, and the BW assigned to one EHT TB PPDU is 160MHz. Therefore, the UL BW subfield is set to indicate the 80MHz BW of the HE TB PPDU, and the EHT UL BW subfield is set to indicate the 160MHz BW of the EHT TB PPDU. For BW assignment option 1B of the 320MHz BW TB FD-A-PDU, the BW assigned to one HE TB PPDU is 160MHz, and the BW assigned to one EHT TB PPDU is 80MHz. Therefore, the UL BW subfield is set to indicate the 160MHz BW of the HE TB PPDU, and the EHT UL BW subfield is set to indicate the 80MHz BW of the EHT TB PPDU. For BW assignment option 1C of the 320MHz BW TB FD-A-PDU, the BW assigned to one HE TB PPDU is 80MHz, and the BW assigned to each of the two EHT TB PPDUs is also 80MHz. Therefore, the UL BW subfield is set to indicate the 80MHz BW of the HE TB PPDU, and the EHT UL BW subfield is set to indicate the 80MHz BW of each of the two EHT TB PPDUs. For BW assignment option 1D of the 320MHz BW TB FD-A-PDU, the BW assigned to one HE TB PPDU is 160MHz, and the BW assigned to one EHT TB PPDU is also 160MHz. Therefore, both the UL BW subfield and the EHT UL BW subfield are set to indicate the 160MHz BW. For the 320MHz BW TB FD-A-PDU, BW allocation option 1E is as follows: one HE TB PPDU has a BW of 80MHz, and one EHT TB PPDU has a BW of 240MHz.Therefore, the UL BW subfield is set to indicate the 80MHz BW of the HE TB PPDU, and since there is no 240MHz EHT TB PPDU and the 240MHz transmission is obtained by puncturing the 80MHz bandwidth from the 320MHz EHT TB PPDU, the EHT UL BW subfield is set to indicate the 320MHz BW. 【0090】 In the second embodiment, for a 320 MHz BW TB FD-A-PPDU containing one HE TB PPDU and one or two EHT TB PPDUs, regardless of the BW assignment option, the BW of the HE-SIG-A field of one HE TB PPDU is the same as the assigned BW, and the BW of the U-SIG fields of one or two EHT TB PPDUs is the same as the assigned BW. 【0091】 Figure 9 is a block diagram showing an example of the common information field format for a trigger frame according to a third embodiment. The Enhanced Trigger Frame Flag subfield is used to indicate whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame. The Enhanced Trigger Frame Flag subfield is set to 0 to indicate an 802.11ax trigger frame and to 1 to indicate an enhanced trigger frame. When the Enhanced Trigger Frame Flag subfield is set to indicate an 802.11ax trigger frame, the Delta EHT UL BW subfield is reserved, and the UL BW subfield indicates the BW of the HE-SIG-A field of the requested HE TBPPDU. When the Enhanced Trigger Frame Flag subfield is set to indicate an enhanced trigger frame, the UL BW subfield indicates the BW of the HE-SIG-A field of one HE TB PPDU in the requested TB FD-A-PDU, and both the Delta EHT UL BW subfield and the UL BW subfield indicate the BW of the U-SIG field of the requested EHT TB PPDU or the BW of the U-SIG field of one or two EHT TB PPDUs in the requested TB FD-A-PDU. In one embodiment, the Delta EHT UL BW subfield is set to 0 to indicate that the BW of the U-SIG field of the requested EHT TB PPDU or the BW of the U-SIG field of one or two EHT TB PPDUs in the requested TB FD-A-PDU is the same as the BW indicated in the UL BW subfield. The BWP of the U-SIG field of the requested EHT TB PPDU and the BW of the U-SIG field of one or two of the requested TB FD-A-PDUs may be 20 MHz, 40 MHz, 80 MHz, or 160 MHz. The Delta EHT UL BW subfield is set to 1 to indicate that the BW of the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or two of the requested TB FD-A-PDUs is the next available BW greater than the BW indicated in the UL BW subfield.The Delta EHT UL BW subfield is set to 2 to indicate that the BW of the U-SIG field of one or two EHT TB PPDUs (either the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or two EHT TB PPDUs) is the second next available BW greater than the BW indicated in the UL BW subfield. The Delta EHT UL BW subfield is set to 3 to indicate that the BW of the U-SIG field of one or two EHT TB PPDUs (either the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or two EHT TB PPDUs) is the next available BW smaller than the BW indicated in the UL BW subfield. For example, if the UL BW subfield is set to indicate an 80MHz BW and the Delta EHT UL BW subfield is set to 0, then the BW of the U-SIG field of one or two EHT TB PPDUs (either the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or two EHT TB PPDUs) is 80MHz. If the UL BW subfield indicates 80MHz BW and the Delta EHT UL BW subfield is set to 1, the BW of the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or two of the requested TB FD-A-PDUs is 160MHz. If the UL BW subfield indicates 80MHz BW and the Delta EHT UL BW subfield is set to 2, the BW of the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or two of the requested TB FD-A-PDUs is 320MHz. If the UL BW subfield indicates 160 MHz BW and the Delta EHT UL BW subfield is set to 3, the BW of the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or two of the requested TB FD-A-PDUs is 80 MHz. Valid combinations of UL BW subfield indications and Delta EHT UL BW subfield values ​​are shown in Table 11. 【0092】 [Table 2] 【0093】 If the Enhanced Trigger Frame Flag subfield is set to indicate an enhanced trigger frame, the UL BW subfield indicates a BW within HE-SIG-A. For example, a trigger frame with the common information field shown in Figure 9 is used to request an HE TB PPDU transmission from an HE STA, an EHT TB PPDU transmission from an EHT STA, or a TB FD-A-PDU transmission from both an HE STA and an EHT STA. The TB PPDU for each scheduled HE STA transmission is an HE TB PPDU, and the TB PPDU transmitted at each scheduled EHT STA is either an HE TB PPDU or an EHT TB PPDU. For example, if a trigger frame is used to request a 160MHz HE TBPPDU transmission from an HE STA, the Enhanced Trigger Frame Flag subfield is set to indicate an 802.11ax trigger frame, and the UL BW subfield is set to indicate a 160 / 80+80MHz bandwidth. Furthermore, for example, if the trigger frame is used to request a 320MHz EHT TB PPDU transmission from an EHT STA, the Enhanced Trigger Frame Flag subfield is set to indicate an Enhanced Trigger Frame, the UL BW subfield is set to indicate an 80MHz BW, and the Delta EHT UL BW subfield is set to 2. If the trigger frame is used to request an FD-A-PDU transmission from an HE STA and an EHT STA, the Enhanced Trigger Frame Flag subfield is set to indicate an Enhanced Trigger Frame, and the UL BW subfield and Delta EHT UL BW subfield are set based on the FD-A-PDU BW and BW assignment options shown in Table 12. 【0094】 [Table 3] 【0095】 As can be seen from Table 12, for BW assignment option 1A of the 320MHz BW TB FD-A-PDU, the BW assigned to one HE TB PPDU is 80MHz, and the BW assigned to one EHT TB PPDU is 160MHz. Therefore, the UL BW subfield is set to indicate 80MHz BW, and the Delta EHT UL BW subfield is set to 1. For BW assignment option 1B of the 320MHz BW TB FD-A-PDU, the BW assigned to one HE TB PPDU is 160MHz, and the BW assigned to one EHT TB PPDU is 80MHz. Therefore, the UL BW subfield is set to indicate 160MHz BW, and the Delta EHT UL BW subfield is set to 3. For the 320MHz BW TB FD-A-PDU, BW assignment option 1C is used, where one HE TB PPDU is assigned 80MHz BW, and each of the two EHT TB PPDUs is assigned 80MHz BW. Therefore, the UL BW subfield is set to indicate 80MHz BW, and the Delta EHT UL BW subfield is set to 0. For the 320MHz BW TB FD-A-PDU, BW assignment option 1D is used, where one HE TB PPDU is assigned 160MHz BW, and one EHT TB PPDU is assigned 160MHz BW. Therefore, the UL BW subfield is set to indicate 160MHz BW, and the Delta EHT UL BW subfield is set to 0. For the BW assignment option 1E of the 320MHz BW TB FD-A-PDU, the BW assigned to one HE TB PPDU is 80MHz, and the BW assigned to one EHT TB PPDU is 240MHz. Therefore, the UL BW subfield is set to indicate an 80MHz BW, and since there is no 240MHz EHT TB PPDU and 240MHz transmission is obtained by puncturing the 80MHz bandwidth from the 320MHz EHT TB PPDU, the Delta EHT UL BW subfield is set to 2. 【0096】 According to the third embodiment, for a 320 MHz BW TB FD-A-PPDU including one HE TB PPDU and one or two EHT TB PPDUs, regardless of the BW assignment option, the BW of the HE-SIG-A field of one HE TB PPDU is the same as the assigned BW, and the BW of the U-SIG fields of one or two EHT TB PPDUs is the same as the assigned BW. 【0097】 Compared to the second embodiment, in which the trigger frame's common information field includes a 3-bit EHT UL BW subfield, the third embodiment has a 2-bit Delta EHT UL BW subfield, allowing one reserved bit to be used in the trigger frame's common information field. 【0098】 According to the present invention, the common information field of the trigger frame includes the UL BW subfield and subfields. 【0099】 In the first embodiment, when the trigger frame is used to request TB FD-A-PDU transmission, where the requested TB FD-A-PDU includes one HE TB PPDU and one or two EHT TB PPDUs, the UL BW subfield indicates the BW in the HE-SIG-A field of one HE TB PPDU, which is the same as the BW in the U-SIG field of one or two EHT TB PPDUs, and the BW indicated in the UL BW subfield may be equal to half the BW of the requested TB FD-A-PDU. When the trigger frame is used to request EHT TB PPDU transmission, both the UL BW subfield and the subfield indicate the BW in the HE-SIG-A field of the requested EHT TB PPDU. In the second embodiment, when the trigger frame is used to request TB FD-A-PDU transmission or EHT TB PPDU transmission, the UL BW subfield indicates the BW of the HE-SIG-A field of one HE TB PPDU in the requested TB FD-A-PDU, and the subfield indicates the BW of the U-SIG field of one or two EHT TB PPDUs in the requested TB FD-A-PDU or the BW in the U-SIG field of the requested EHT TB PPDU. The UL BW subfield and the values ​​of the subfields can be set based on the BW and BW assignment of the requested TB FD-A-PDU. 【0100】 In a third embodiment, when the trigger frame is used to request a TB FD-A-PDU transmission or an EHT TB PPDU transmission, the UL BW subfield indicates the BW of the HE-SIG-A field of one HE TB PPDU in the requested TB FD-A-PDU, and both the UL BW subfield and the subfield indicate the BW in the U-SIG field of one or two EHT TB PPDUs in the requested TB FD-A-PDU or in the U-SIG field of the requested EHT TB PPDU. 【0101】 Various embodiments of the present invention also provide computer program products. These computer program products include instructions that cause a computer to execute a method for requesting TB PPDU transmission over a WLAN according to any embodiment of the present invention. 【0102】 Various embodiments of the present invention also provide computer programs. The computer programs include instructions that cause a computer to execute a method for requesting TB PPDU transmission over a WLAN according to any embodiment of the present invention. 【0103】 Various embodiments of the present invention also provide a non-volatile storage medium. The non-volatile storage medium includes computer program code that, when executed on a computer, causes the computer to execute a method for requesting TB PPDU transmission in a WLAN according to any embodiment of the present invention. 【0104】 Various embodiments of the present invention also provide a chip configured to perform a method for requesting TB PPDU transmission in a WLAN according to any embodiment of the present invention. 【0105】 It should be noted that the above-described embodiments and features are illustrative, not restrictive. Those skilled in the art will see many other embodiments by considering the specification and circumstances of the present invention. Therefore, the scope of the present invention should be determined by reference to the appended claims and all equivalent scopes given by these claims. Furthermore, the use of specific terms is for illustrative purposes only, and not to limit the embodiments disclosed herein.

Claims

[Claim 1] A method for requesting trigger-based (TB) physical layer protocol data unit (PPDU) transmission in a wireless LAN (WLAN), A station (STA) receives a trigger frame to request one type of TB PPDU transmission from multiple STAs in a WLAN, This includes transmitting the requested TB PPDU in the BW indicated by one or two subfields in the trigger frame via the STA, The type of TB PPDU transmission includes high-efficiency (HE) TB PPDU transmission, extremely high-throughput (EHT) TB PPDU transmission, or TB frequency domain aggregation PPDU FD-A-PPDU transmission, wherein one or two subfields in the trigger frame indicate the required TB PPDU bandwidth (BW). The common information field of the trigger frame is: Includes an uplink (UL) bandwidth (BW) subfield indicating the BW of the requested HE TB PPDU, The common information field of the trigger frame further includes an enhanced trigger frame flag subfield indicating whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame, wherein the enhanced trigger frame flag subfield is located between the UL spatial multiplexing subfield and the trigger-related common information subfield in the trigger frame's common information field, the enhanced trigger frame flag subfield occupies one bit in the trigger frame's common information field, the UL spatial multiplexing subfield occupies 16 bits in the trigger frame's common information field, and the length of the trigger-related common information subfield is variable. If the Enhanced Trigger Frame Flag subfield indicates that the trigger frame is an enhanced trigger frame, then both the UL BW subfield and the Delta EHT UL BW subfield indicate the BW of the requested EHT TB PPDU. The UL BW subfield occupies two bits in the common information field of the trigger frame, and the Delta EHT UL BW subfield occupies two bits in the enhanced trigger frame. A method characterized by the following: [Claim 2] The BW of the requested HE TB PPDU, as indicated by the UL BW subfield in the common information field of the trigger frame, is located in the HE SIGNALA (HE SIG-A) field of the requested HE TB PPDU. The method according to feature 1. [Claim 3] The BW of the requested EHT TB PPDU, as indicated by both the UL BW subfield and the Delta EHT UL BW subfield, is located in the Common Signal (U-SIG) field of the requested EHT TB PPDU. The method according to claim 1, characterized by the features described above. [Claim 4] The required EHT TB PPDU bandwidth is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. The method according to 1 or 3, characterized by the above. [Claim 5] If the required EHT TB PPDU bandwidth is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, then the required EHT TB PPDU bandwidth is the same as the required HE TB PPDU bandwidth. The method according to any one of claims 1 to 4. [Claim 6] If the required EHT TB PPDU's bandwidth is 320 MHz, then the required EHT TB PPDU's bandwidth is the next available bandwidth that is greater than the required HE TB PPDU's bandwidth. The method according to any one of claims 1 to 4. [Claim 7] If the required EHT TB PPDU bandwidth is 80 MHz, then the required EHT TB PPDU bandwidth is the next available bandwidth which is smaller than the required HE TB PPDU bandwidth. The method according to any one of claims 1 to 4. [Claim 8] The enhanced trigger frame includes the common information field and a user information list field which includes one or more user information fields. The method according to any one of claims 1 to 7, characterized by the features described herein. [Claim 9] The required bandwidth for the HE TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 / 80 + 80 MHz. The method according to any one of claims 1 to 8. [Claim 10] The plurality of STAs include a plurality of HE STAs and / or a plurality of EHT STAs. The method according to any one of claims 1 to 9, characterized by... [Claim 11] A station (STA) in a wireless LAN (WLAN) that requests trigger-based (TB) physical layer protocol data unit (PPDU) transmission, The STA is configured to perform the method described in any one of claims 1 to 10. STA characterized by the following. [Claim 12] A method for requesting trigger-based (TB) physical layer protocol data unit (PPDU) transmission in a wireless LAN (WLAN), The method involves generating a trigger frame at an access point (AP) based on the type of TB PPDU transmission requested by multiple stations (STAs) in a WLAN, wherein the type of TB PPDU transmission includes high-efficiency (HE) TB PPDU transmission, extremely high-throughput (EHT) TB PPDU transmission, or TB frequency domain aggregation PPDU FD-A-PPDU transmission, and one or two subfields in the trigger frame indicate the bandwidth (BW) of the requested TB PPDU. This includes receiving a requested TB PPDU via the AP in the BW indicated by one or two subfields in the trigger frame, The common information field of the trigger frame is: Includes an uplink (UL) bandwidth (BW) subfield indicating the BW of the requested HE TB PPDU, The common information field of the trigger frame further includes an enhanced trigger frame flag subfield indicating whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame, wherein the enhanced trigger frame flag subfield is located between the UL spatial multiplexing subfield and the trigger-related common information subfield in the trigger frame's common information field, the enhanced trigger frame flag subfield occupies one bit in the trigger frame's common information field, the UL spatial multiplexing subfield occupies 16 bits in the trigger frame's common information field, and the length of the trigger-related common information subfield is variable. If the Enhanced Trigger Frame Flag subfield indicates that the trigger frame is an enhanced trigger frame, then both the UL BW subfield and the Delta EHT UL BW subfield indicate the BW of the requested EHT TB PPDU. The UL BW subfield occupies two bits in the common information field of the trigger frame, and the Delta EHT UL BW subfield occupies two bits in the enhanced trigger frame. A method characterized by the following: [Claim 13] The required EHT TB PPDU bandwidth is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. The method according to 12, characterized by the features described above. [Claim 14] If the required EHT TB PPDU bandwidth is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, then the required EHT TB PPDU bandwidth is the same as the required HE TB PPDU bandwidth. The method according to 12 or 13, characterized by the features described herein. [Claim 15] An access point (AP) in a wireless LAN (WLAN) that requests trigger-based (TB) physical layer protocol data unit (PPDU) transmission, The AP is configured to perform the method described in any one of claims 12 to 14. AP characterized by the following:

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