Method and apparatus for requesting PPDU transmission in WLAN

Abstract

Embodiments of the present invention provide a method and apparatus for requesting physical layer protocol data unit (PPDU) transmission in a wireless local area network (WLAN). The method for requesting PPDU transmission includes: an access point (AP) generates a trigger frame based on the type of PPDU transmission to be requested from multiple stations (STA) in the WLAN, wherein the type of 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 indicate the bandwidth (BW) of the requested PPDU, and the AP transmits the generated trigger frame to multiple STAs. Through the method and apparatus proposed in the embodiments of the present invention, the generated trigger frame can be used to indicate the BW of the PPDU requested in the WLAN.

Description

[0001] This application is a divisional application of the invention patent application with application date of December 2, 2021, application number 202180079519.1, and invention name “Method and device for requesting trigger-based physical layer protocol data unit transmission in a wireless local area network”. Technical Field

[0002] The present invention relates to wireless communications, and more particularly, to a method and apparatus for utilizing a triggered frame request (TB) physical layer protocol data unit (PPDU) transmission in a wireless local area network (WLAN). 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. It is expected that high-efficiency (HE) stations (STAs) will exist in the same EHT basic service set (BSS) with EHT STAs. To maximize the throughput of EHT BSSs with large BW (e.g., 160 MHz or 320 MHz), the frequency-domain aggregate physical layer protocol data unit (FD-A-PPDU) is 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-PPDU transmission. However, enhancing the 802.11ax trigger frame to achieve this goal is an open issue. Summary of the invention

[0004] Embodiments of the present invention provide a method and apparatus for requesting PPDU transmission using a trigger frame in a WLAN.

[0005] According to a first aspect of the present invention, various embodiments of the present invention provide a method for requesting PPDU transmission in a WLAN. The method can be implemented by an AP in the WLAN, and the method includes: an access point (AP) generates a trigger frame based on the type of PPDU transmission to be requested from multiple stations (STAs) in the WLAN, wherein the type of 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 indicate the bandwidth (BW) of the requested PPDU, and the AP transmits the generated trigger frame to the multiple STAs.

[0006] According to a second aspect of the present invention, various embodiments of the present invention provide a method for requesting PPDU transmission in a WLAN. The method may be implemented by a STA in the WLAN, and the method includes: receiving a trigger frame for requesting a type of PPDU transmission from multiple STAs in the WLAN, wherein the type of the 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 indicate a bandwidth (BW) of the requested PPDU, and the STA transmits the requested PPDU in the BW indicated by one or two subfields in the trigger frame.

[0007] According to a third aspect of the present invention, various embodiments of the present invention provide an AP for requesting PPDU transmission in a WLAN. The AP comprises: a generation unit configured to generate a trigger frame based on the type of PPDU transmission to be requested from multiple stations (STAs) in the WLAN, wherein the type of PPDU transmission comprises 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 PPDU; and a first transmission unit configured to transmit the generated trigger frame to the multiple STAs.

[0008] According to a fourth aspect of the present invention, various embodiments of the present invention provide a STA for requesting PPDU transmission in a WLAN. The STA includes: a receiving unit configured to receive a trigger frame for requesting a type of PPDU transmission from multiple STAs in the WLAN, wherein the type of the 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 a bandwidth (BW) of the requested PPDU; a second transmission unit configured to transmit the requested PPDU in the BW indicated by one or two subfields in the trigger frame.

[0009] According to a fifth aspect of the present invention, various embodiments of the present invention provide an AP for requesting PPDU transmission in a WLAN. The AP includes: a memory configured to store instructions for requesting PPDU transmission in a WLAN; and a processor communicatively coupled to the memory, the processor configured to execute the instructions to enable the AP to perform: generating a trigger frame based on the type of PPDU transmission to be requested from multiple stations (STAs) in the WLAN, wherein the type of 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 indicate the bandwidth (BW) of the requested PPDU, and the AP transmits the generated trigger frame to the multiple STAs.

[0010] According to a sixth aspect of the present invention, various embodiments of the present invention provide a STA for requesting PPDU transmission in a WLAN. The STA includes: a memory configured to store instructions for requesting PPDU transmission in the WLAN; and a processor communicatively coupled to the memory, the processor configured to execute the instructions to enable the STA to perform: receiving a trigger frame for requesting a type of PPDU transmission from multiple STAs in the WLAN, wherein the type of the 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 indicate a bandwidth (BW) of the requested PPDU, and transmitting the requested PPDU in the BW indicated by one or two subfields in the trigger frame.

[0011] According to a seventh aspect of the present invention, various embodiments of the present invention provide a computer program product. The computer program product includes instructions, which, when executed on a computer, enable the computer to perform a method for requesting PPDU transmission in a WLAN according to any embodiment of the present invention.

[0012] According to an eighth aspect of the present invention, various embodiments of the present invention provide a computer program, wherein the computer program includes instructions, and when the instructions are executed on a computer, the computer executes a method for requesting PPDU transmission in a WLAN according to any embodiment of the present invention.

[0013] According to a ninth aspect of the present invention, various embodiments of the present invention provide a non-volatile storage medium. The non-volatile storage medium includes a computer program code, and when the computer program code is executed on a computer, the computer executes a method for requesting PPDU transmission in a WLAN according to any embodiment of the present invention.

[0014] According to a tenth aspect of the present invention, various embodiments of the present invention provide a chip. The chip is configured to, when executed thereon, perform a method for requesting PPDU transmission in a WLAN according to any embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be described in detail with reference to the accompanying drawings, in which:

[0016] Figure 1 is a schematic diagram illustrating uplink multi-user (MU) transmission according to an embodiment of the present invention.

[0017] Figure 2A is a block diagram showing the format of HE TB PPDU.

[0018] Figure 2B is a block diagram showing the format of an EHT TB PPDU.

[0019] Figure 3 is a 160 MHz BW allocation for TB FD-A-PPDU transmission according to an embodiment of the present invention.

[0020] Figure 4A is an option for 320 MHz BW allocation for TB FD-A-PPDU transmission according to an embodiment of the present invention.

[0021] Figure 4B is another option of 320 MHz BW allocation for TB FD-A-PPDU transmission according to an embodiment of the present invention.

[0022] Figure 4C is another option of 320 MHz BW allocation for TB FD-A-PPDU transmission according to an embodiment of the present invention.

[0023] Figure 4D is another option of 320 MHz BW allocation for TB FD-A-PPDU transmission according to an embodiment of the present invention.

[0024] Figure 4E is another option of 320 MHz BW allocation for TB FD-A-PPDU transmission according to an embodiment of the present invention.

[0025] Figure 5A is a diagram showing an example of a trigger frame for requesting HE TB PPDU transmission in WLAN.

[0026] Figure 5Bis a diagram showing an example of a trigger frame for requesting EHT TB PPDU transmission in a WLAN.

[0027] Figure 5C is a diagram showing an example of a trigger frame for requesting TB FD-A-PPDU transmission in a WLAN.

[0028] Fig. 6A is a block diagram showing a trigger frame format according to an embodiment of the present invention.

[0029] Figure 6B is a block diagram showing an example of a user information field format of a trigger frame according to an embodiment of the present invention.

[0030] Figure 7 is a block diagram showing an example of a common information field format of a trigger frame according to the first embodiment.

[0031] Figure 8 is a block diagram showing an example of a common information field format of a trigger frame according to the second embodiment.

[0032] Fig. 9 is a block diagram showing an example of a common information field format of a trigger frame according to the third embodiment.

[0033] Fig.10 is a flow chart illustrating a method implemented by an AP for requesting PPDU transmission in a WLAN according to some embodiments of the present invention.

[0034] Fig.11 is a flow chart illustrating a method implemented by a STA for requesting PPDU transmission in a WLAN according to some embodiments of the present invention.

[0035] Fig. 12A FIG. 4 is a schematic diagram showing an AP for requesting PPDU transmission in a WLAN according to an embodiment of the present invention.

[0036] Fig. 12B FIG. 4 is a schematic diagram showing an AP for requesting PPDU transmission in a WLAN according to an embodiment of the present invention.

[0037] Fig.13A FIG. 4 is a schematic diagram showing an STA for requesting PPDU transmission in a WLAN according to an embodiment of the present invention.

[0038] Fig. 13B FIG. 4 is a schematic diagram showing an STA for requesting PPDU transmission in a WLAN according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The technical content, structural features, objectives and effects of the embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. Specifically, the terms in the embodiments of the present disclosure are only used to describe the purpose of specific embodiments and are not used to limit the present disclosure.

[0040] The method and apparatus for using a trigger frame to request PPDU transmission in a WLAN of the present invention can also be understood as a method and apparatus for transmitting PPDU transmission in a WLAN, which is a rough summary of the present invention, but when executing this method, the specific characteristics of the AP or STA are not limited.

[0041] Figure 1 is a schematic diagram showing uplink multi-user (MU) transmission according to an embodiment of the present invention. When a trigger frame for requesting TB FD-A-PPDU transmission from HE STA and EHT STA is received from the AP, each scheduled HE STA and EHT STA will transmit a TB PPDU according to the scheduling information in the received trigger frame. The TB PPDU sent by each scheduled HE STA is a HE TB PPDU, and the TB PPDU sent by each scheduled EHT STA is a HE TB PPDU or an EHT TB PPDU.

[0042] Multiple HE TB PPDUs transmitted by different STAs on non-overlapping frequency domain resources and / or spatial domain resources in 20 / 40 / 80 / 160 / 320MHz channels can be regarded as a single HE TB PPDU. Similarly, multiple EHT TB PPDUs transmitted by different STAs on non-overlapping frequency domain resources and / or spatial domain resources in 20 / 40 / 80 / 160 / 320MHz channels can be regarded as a single EHT TB PPDU. The HE TB PPDUs and EHT TB PPDUs transmitted by all scheduled HE STAs and EHT STAs constitute a TBFD-A-PPDU. In response to the received TB FD-A-PPDU, the AP will transmit a multi-site block acknowledgment (Multi-STA BA) frame.

[0043] Figure 2A is a block diagram showing the format of an HE TB PPDU, Figure 2Bis a block diagram showing the format of an EHT TB PPDU. In the HE TB PPDU, a non-HT short training field (L-STF), a non-HT long training field (L-LTF), a non-HT SIGNAL field (L-SIG), a repeated L-SIG field (RL-SIG), and a HE SIGNAL A field (HE-SIG-A) are referred to as pre-HE modulation fields, and a HE short training field (HE-STF), a HE long training field (HE-LTF), a data field, and a packet extension (PE) field are referred to as HE modulation fields. In the EHT TB PPDU, L-STF, L-LTF, L-SIG field, RL-SIG field, and U-SIG field are referred to as pre-EHT modulation fields, and an EHT short training field (EHT-STF), an EHT long training field (EHT-LTF), a data field, and a PE field are referred to as EHT modulation fields.

[0044] Each HE-LTF or EHT-LTF symbol has the same guard interval (GI) duration as each data symbol, which is 0.8μs, 1.6μs, or 3.2μs. The HE-LTF field includes three types: 1x HE-LTF, 2x HE-LTF, and 4x HE-LTF. Similarly, the EHT-LTF field includes three types: 1x EHT-LTF, 2x EHT-LTF, and 4x EHT-LTF. The duration of each 1x HE-LTF / EHT-LTF, 2xHE-LTF / EHT-LTF, or 4x HE-LTF / EHT-LTF symbol without GI is 3.2μs, 6.4μs, or 12.8μs. Each data symbol without GI is 12.8μs. The PE field duration of the HE TB PPDU is 0 μs, 4 μs, 8 μs, 12 μs or 16 μs; while the PE field duration of the EHT TB PPDU is 0 μs, 4 μs, 8 μs, 12 μs, 16 μs or 20 μs.

[0045] According to the present invention, in an EHT BSS with a large BW (e.g., 160 MHz or 320 MHz), if the HE-LTF field has the same symbol duration and the same GI duration as the EHT-LTF field, the TBFD-A-PPDU for uplink MU transmission may include one HE TB PPDU and one or two EHT TB PPDUs.

[0046] The number of HE-LTF symbols may be the same as or different from the number of EHT-LTF symbols. When 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 be 6.4 μs or 12.8 μs. When the number of HE-LTF symbols is different from the number of EHT-LTF symbols, the duration of each HE-LTF / EHT-LTF symbol shall be the same as each data symbol. In other words, each HE-LTF / EHT-LTF symbol without GI shall be 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 remain orthogonal symbol by symbol in the frequency domain.

[0047] For uplink MU transmission, each scheduled HE STA can reside in the primary 80MHz channel (P80); while each scheduled EHT STA can reside in one of the non-primary 80MHz channels through an enhanced selective subchannel transmission (SST) mechanism. The non-primary 80MHz channel is an 80MHz frequency band other than P80, such as a secondary 80MHz channel (S80) in a 160MHz or 320MHz channel.

[0048] According to the present invention, in a 160MHz BW TB FD-A-PPDU, the BW allocated to the HE STA is P80, and the BW allocated to the EHT STA is S80. In this case, one HE TB PPDU can be transmitted in P80, and one EHT TB PPDU can be transmitted in S80. Figure 3 is a 160 MHz BW allocation for TB FD-A-PPDU transmission according to an embodiment of the present invention.

[0049] According to the present invention, in the 320MHz BW TB FD-A-PPDU, the BW allocated to the HE STA is P80 or the primary 160MHz channel (P160); the BW allocated to the EHT STA is one of the two 80MHz frequency bands of the secondary 160MHz channel (S160), or S160, or a combination of one of the two 80MHz frequency bands of S80 and S160, or a combination of S80 and S160.

[0050] For 320MHz BW FD-A-PPDU, there are five options for BW allocation in TB FD-A-PPDU:

[0051] Option 1A: If Figure 4AAs shown, when S80 is punctured, the BW allocated to HE STA is P80, and the BW allocated to EHT STA is S160. One HE TB PPDU can be transmitted in P80, and one EHT TB PPDU can be transmitted in S160.

[0052] Option 1B: If Figure 4B As shown in FIG. 1 , when one of the two 80MHz bands of S160 is punctured, the BW allocated to HE STA is P160, and the BW allocated to 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 unpunctured 80MHz band of S160.

[0053] Option 1C: If Figure 4C As shown in the figure, when one of the two 80MHz bands of S160 is punctured, the BW allocated to HE STA is P80, and the BW allocated to EHT STA is S80 and the other 80MHz band of S160. One HE TB PPDU can be transmitted in P80, and two EHT TB PPDUs can be transmitted in the unpunctured 80MHz bands of S80 and S160, respectively.

[0054] Option 1D: If Figure 4D As shown in FIG. 1 , when the 80 MHz frequency band is not punctured, the BW allocated to the HE STA is P160, and the BW allocated to the EHT STA is S160. One HE TB PPDU can be transmitted in P160, and one EHT TB PPDU can be transmitted in S160.

[0055] Option 1E: If Figure 4E As shown in FIG. 1 , when the 80 MHz band is not punctured, the BW allocated to the HE STA is P80, and the BW allocated to the EHT STA is S80 and S160. One HE TB PPDU can be transmitted in P80, and one EHT TB PPDU can be transmitted in S80 and S160.

[0056] In IEEE 802.11be EHT WLAN, the trigger frame can be used to request HE TB PPDU transmission from HE STA, EHT TB PPDU transmission from EHT STA, or TB FD-A-PPDU transmission from HE STA and EHT STA. However, the TB PPDU sent by each scheduled HE STA is a HE TB PPDU, and the TB PPDU sent by each scheduled EHT STA is a HE TB PPDU or an EHT TB PPDU. Figure 5Ais a diagram showing an example of a trigger frame requesting HE TB PPDU transmission from two HE STAs in a WLAN. Figure 5B is a diagram showing an example of a trigger frame for requesting EHT TB PPDU transmission from two EHT STAs in a WLAN. Figure 5C is a diagram showing an example of a trigger frame for requesting TB FD-A-PPDU transmission from one HE STA and one EHT STA in a WLAN.

[0057] Fig. 6A is a block diagram illustrating a trigger frame format according to an embodiment of the present invention. Fig. 6A The trigger frame format shown in includes a common information field and a user information list field including one or more user information fields. The formats of the common information field and the user information field depend on the type of the trigger frame.

[0058] Figure 6B is a block diagram showing an example of the format of the user information field of a trigger frame according to an embodiment of the present invention. The HE / EHT format subfield of the user information field indicates whether the user information field follows the 802.11ax HE format or the 802.11be EHT format. The value of the HE / EHT format subfield of the user information field determines how to interpret the remaining subfields of the user information field. The HE / EHT format subfield of the user information field is set to 0 to indicate the 802.11ax HE format and is set 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 802.11ax HE format, the low / high 160MHz band subfield is reserved, and the RU allocation subfield indicates that the STA indicated by the AID12 subfield will transmit the resource unit (RU) of the HE TB PPDU. 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 / Upper 160MHz Band subfield indicate an RU or Multiple Resource Units (MRU), the STA indicated by the AID12 subfield shall transmit the EHT TB PPDU in the RU or MRU.

[0059] Fig.10 1 is a flow chart showing a method 130 implemented by an AP for requesting PPDU transmission in a WLAN according to some embodiments of the present invention. In an embodiment of the present invention, the method 130 is implemented by an AP. In other embodiments, the method 130 may be implemented by any other suitable network interface device.

[0060] In block 1301, a trigger frame is generated by an AP based on the type of PPDU transmission to be requested from a plurality of STAs (e.g., HE STA and / or EHT STA) in a WLAN. 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 DeltaEHT UL BW, or UL BW subfield and UL BW extension subfield) indicate the BW of the requested PPDU.

[0061] At block 1302, a generated trigger frame is transmitted to a plurality of STAs.

[0062] In one embodiment, the common information field of the trigger frame includes a ULBW subfield indicating the BW of the requested HE TB PPDU.

[0063] In one embodiment, the UL BW subfield occupies 2 bits in the common information field of the trigger frame.

[0064] In one embodiment, the requested BW of the HE TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 / 80+80 MHz.

[0065] 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 SIGNAL A (HE SIG-A) field of the requested HE TB PPDU.

[0066] In one embodiment, the common information field of the trigger frame further includes an enhanced trigger frame flag subfield, which is used to indicate whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame.

[0067] In one embodiment, the enhanced trigger frame includes a common information field and a user information list field including one or more user information fields.

[0068] In one embodiment, when the enhanced trigger frame flag subfield indicates that the trigger frame is an enhanced trigger frame, both the UL BW subfield and the Delta EHT UL BW subfield indicate the requested BW of the EHT TB PPDU.

[0069] In one embodiment, the BW of the requested EHT TB PPDU indicated by both the UL BW subfield and the Delta EHT UL BW subfield is located in the Universal SIGNAL (U-SIG) field of the requested EHT TB PPDU.

[0070] In one embodiment, the Delta EHT UL BW subfield occupies 2 bits of the enhanced trigger frame.

[0071] In one embodiment, the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz.

[0072] In one embodiment, when the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, the requested BW of the EHT TB PPDU is the same as the requested BW of the HE TB PPDU.

[0073] In one embodiment, when the requested BW of the EHT TB PPDU is 40 MHz, 80 MHz, 160 MHz, or 320 MHz, the requested BW of the EHT TB PPDU is the next available BW that is larger than the requested BW of the HE TB PPDU.

[0074] In one embodiment, when 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 that is smaller than the BW of the requested HE TB PPDU.

[0075] In another embodiment, when 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.

[0076] In this embodiment, the BW of the requested EHT TB PPDU indicated by both the UL BW subfield and the UL BW extension subfield is located in a Universal SIGNAL (U-SIG) field of the requested EHT TB PPDU.

[0077] In this embodiment, the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz.

[0078] In this embodiment, when 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 larger than the BW of the requested HE TB PPDU.

[0079] In this embodiment, when 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 that is smaller than the BW of the requested HE TB PPDU.

[0080] Fig.11 1 is a flow chart showing a method 140 implemented by a STA for requesting PPDU transmission in a WLAN according to some embodiments of the present invention. In an embodiment of the present invention, the method 140 is implemented by a STA. In other embodiments, the method 140 may be implemented by any other suitable client device.

[0081] In block 1401, a trigger frame from an AP is received by a STA (e.g., a HE STA and / or an EHT STA), the trigger frame being generated based on the type of PPDU transmission to be requested from a plurality of STAs (e.g., a HE STA and / or an 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., a UL BW subfield, a UL BW subfield and a Delta EHT UL BW, or a UL BW subfield and a UL BW extension subfield) indicate the BW of the requested PPDU.

[0082] At block 1402, a requested PPDU is transmitted by a STA in a BW indicated by one or both subfields in a trigger frame.

[0083] In one embodiment, the common information field of the trigger frame includes a ULBW subfield indicating the BW of the requested HE TB PPDU.

[0084] In one embodiment, the UL BW subfield occupies 2 bits in the common information field of the trigger frame.

[0085] In one embodiment, the requested BW of the HE TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 / 80+80 MHz.

[0086] 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 SIGNAL A (HE SIG-A) field of the requested HE TB PPDU.

[0087] In one embodiment, the common information field of the trigger frame further includes an enhanced trigger frame flag subfield, which is used to indicate whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame.

[0088] In one embodiment, the enhanced trigger frame includes a common information field and a user information list field including one or more user information fields.

[0089] In one embodiment, when the enhanced trigger frame flag subfield indicates that the trigger frame is an enhanced trigger frame, both the UL BW subfield and the Delta EHT UL BW subfield indicate the BW of the requested EHT TB PPDU.

[0090] In one embodiment, the BW of the requested EHT TB PPDU indicated by both the UL BW subfield and the Delta EHT UL BW subfield is located in the Universal SIGNAL (U-SIG) field of the requested EHT TB PPDU.

[0091] In one embodiment, the Delta EHT UL BW subfield occupies 2 bits of the enhanced trigger frame.

[0092] In one embodiment, the BW of the requested EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz.

[0093] In one embodiment, when the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, the requested BW of the EHT TB PPDU is the same as the requested BW of the HE TB PPDU.

[0094] In one embodiment, when the requested BW of the EHT TB PPDU is 40 MHz, 80 MHz, 160 MHz, or 320 MHz, the requested BW of the EHT TB PPDU is the next available BW that is larger than the requested BW of the HE TB PPDU.

[0095] In one embodiment, when 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 that is smaller than the BW of the requested HE TB PPDU.

[0096] In another embodiment, when 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 requested BW of the EHT TB PPDU.

[0097] In this embodiment, the BW of the requested EHT TB PPDU indicated by both the UL BW subfield and the UL BW extension subfield is located in the Universal SIGNAL (U-SIG) field of the requested EHT TB PPDU.

[0098] In this embodiment, the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz.

[0099] In this embodiment, when the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, the requested BW of the EHT TB PPDU is the same as the requested BW of the HE TB PPDU.

[0100] In this embodiment, when 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 larger than the BW of the requested HE TB PPDU.

[0101] In this embodiment, when 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 that is smaller than the BW of the requested HE TB PPDU.

[0102] Fig. 12A 1 is a schematic diagram showing an AP 1500A for requesting PPDU transmission in a WLAN according to an embodiment of the present invention. In this embodiment, the AP 1500A 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 PPDU transmission to be requested from multiple STAs (e.g., HE STA and / or EHT STA) in the WLAN. 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 EHTUL BW, or UL BW subfield and UL BW extension subfield) indicate the BW of the requested PPDU. The first transmission unit 1502b is configured to transmit the requested PPDU in the BW indicated by one or two subfields in the trigger frame.

[0103] Fig. 12B1 is a schematic diagram showing an AP 1500B for requesting PPDU transmission in a WLAN according to an embodiment of the present invention. The AP 1500B includes: a memory 1501b configured to store instructions for requesting PPDU transmission in a WLAN; and a processor 1502b, which is communicatively coupled to the memory, and the processor 1502b is configured to execute the instructions to enable the AP 1500B to perform a method for requesting PPDU transmission in a WLAN according to some embodiments of the present invention, for example, Fig.10 The above method shown.

[0104] Fig.13A 1 is a schematic diagram showing a STA 1600A for requesting PPDU transmission in a WLAN according to an embodiment of the present invention. In this embodiment, the STA 1600A includes a receiving unit 1601a and a second transmission unit 1602b. The receiving unit 1601a is configured to receive a trigger frame for requesting a type of PPDU transmission from multiple STAs (e.g., multiple HE STAs and / or multiple EHT STAs) in the WLAN. The type of PPDU transmission includes HE TB PPDU transmission, EHT TB PPDU transmission, or TBFD-A-PPDU transmission, and one or two subfields in the trigger frame (e.g., UL BW subfield, UL BW subfield and DeltaEHT UL BW, or UL BW subfield and UL BW extension subfield) indicate the bandwidth (BW) of the requested PPDU. The second transmission unit 1602b is configured to transmit the requested PPDU in the BW indicated by one or two subfields in the trigger frame.

[0105] Fig. 13B 1 is a schematic diagram showing a STA 1600B for requesting PPDU transmission in a WLAN according to an embodiment of the present invention. The STA 1600B includes: a memory 1601b configured to store instructions for requesting PPDU transmission in a WLAN; and a processor 1602b, which is communicatively coupled to the memory, and the processor 1602b is configured to execute the instructions so that the STA 1600B performs a method for requesting PPDU transmission in a WLAN according to some embodiments of the present invention, for example, Fig.11 The above method shown.

[0106] Figure 7is a block diagram showing an example of the common information field format of a trigger frame according to 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 is set 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 EHTTB PPDU, which is 20MHz, 40MHz, 80MHz, 160MHz, or 320MHz.

[0107] Figure 7 The trigger frame with the common information field shown in can be used to request HE TB PPDU transmission from HE STA or EHT TB PPDU transmission from EHT STA. For example, when the trigger frame is used to request 160MHz HETB PPDU transmission from HE STA, the enhanced trigger frame flag subfield of the common information field is set to indicate 802.11ax trigger frame, and the UL BW subfield is set to indicate 160 / 80+80MHz BW. For another example, when the trigger frame is used to request 320MHz EHT TB PPDU transmission from EHT STA, the enhanced trigger frame flag subfield is set to indicate enhanced trigger frame, and the UL BW subfield and UL BW extension subfield are both set to indicate 320MHz BW.

[0108] Figure 7The trigger frame with the common information field shown in can also be used to request TB FD-A-PPDU transmission from HE STA and EHT STA, where the requested TB FD-A-PPDU 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 of the BW of the requested TB FD-A-PPDU. For example, when the trigger frame is used to request a 160MHz BW TB FD-A-PPDU transmission, the UL BW subfield is set to indicate 80MHz. For another example, when the trigger frame is used to request a 320MHz BW TB FD-A-PPDU transmission, the UL BW subfield is set to indicate 160MHz. However, by doing so, for BW allocation option 1A, 1B, or 1E of a 320 MHz BW TB FD-A-PPDU including one HE TB PPDU and one or two EHT TB PPDUs, the BW in the HE-SIG-A field of one HE TB PPDU is different from its allocated BW, and the BW in the U-SIG field of one or two EHT TB PPDUs is different from their respective allocated BWs.

[0109] Figure 8 is a block diagram showing an example of the common information field format of a trigger frame according to a 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 is set 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 HETB PPDU. When the enhanced trigger frame flag subfield is set to indicate an enhanced trigger frame, the ULBW subfield indicates the BW in the HE-SIG-A field of one HE TB PPDU in the requested TB FD-A-PPDU, and the EHT ULBW subfield indicates the BW in the U-SIG field of the requested EHT TB PPDU or the BW in the U-SIG field of one or both EHT TB PPDUs in the requested TB FD-A-PPDU.

[0110] Figure 8The trigger frame with the common information field shown in can be used to request HE TB PPDU transmission from HE STA, EHT TB PPDU transmission from EHT STA, or TB FD-A-PPDU transmission from HE STA and EHT STA. For example, when the trigger frame is used to request 160MHz HE TB PPDU transmission from HE STA, the enhanced trigger frame flag subfield is set to indicate 802.11ax trigger frame and the UL BW subfield is set to indicate 160 / 80+80MHz BW. For another example, when the trigger frame is used to request 320MHz EHT TB PPDU transmission from EHT STA, the enhanced trigger frame flag subfield is set to indicate enhanced trigger frame and the EHT UL BW subfield is set to indicate 320MHz BW. When the trigger frame is used to request FD-A-PPDU transmission from HE STA and EHT STA, the Enhanced Trigger Frame Flag subfield is set to indicate the enhanced trigger frame, as shown in Table 9, and the values ​​of the UL BW subfield and the EHT UL BW subfield are set according to the BW and BW allocation of the requested TB FD-A-PPDU.

[0111] Table 9: Settings of the UL BW subfield and the EHT ULBW subfield when a trigger frame is used to request FD-A-PPDU transmission according to the second embodiment

[0112]

[0113] It should be observed from Table 9 that, in the case of BW allocation option 1A for 320MHz BW TB FD-A-PPDU, the BW allocated to one HE TB PPDU is 80MHz, and the BW allocated 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. In the case of BW allocation option 1B for 320MHz BW TB FD-A-PPDU, the BW allocated to one HE TB PPDU is 160MHz, and the BW allocated 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. In the case of BW allocation option 1C for 320MHz BWTB FD-A-PPDU, the BW allocated to one HE TB PPDU is 80MHz, and the BW allocated to each of two EHTTB PPDUs is 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. In the case of BW allocation option 1D for 320MHz BWTB FD-A-PPDU, the BW allocated to one HE TB PPDU is 160MHz, and the BW allocated to one EHTTB PPDU is 160MHz. Therefore, both the UL BW subfield and the EHT UL BW subfield are set to indicate the 160MHz BW. For BW allocation option 1E of 320MHz BW TB FD-A-PPDU, the BW allocated to one HE TB PPDU is 80MHz and the BW allocated to one EHT TB PPDU is 240MHz. Therefore, the UL BW subfield is set to indicate the 80MHz BW of the HE TB PPDU because there is no 240MHz EHT TB PPDU and the 240MHz transmission is obtained by puncturing the 80MHz band from the 320MHz EHT TB PPDU, so the EHT UL BW subfield is set to indicate the 320MHz BW.

[0114] According to the second 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 allocation option, the BW in the HE-SIG-A field of one HE TB PPDU is the same as its allocated BW, and the BW in the U-SIG field of one or two EHT TB PPDUs is the same as their respective allocated BWs.

[0115] Fig. 9is a block diagram showing an example of the common information field format of a trigger frame according to the 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 is set 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 in the HE-SIG-A field of the requested HE TB PPDU. When 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-PPDU, and both the Delta EHT UL BW subfield and the UL BW subfield indicate the BW in the U-SIG field of the requested EHT TB PPDU or the BW in 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 in the U-SIG field of the requested EHT TB PPDU or the BW in the U-SIG field of one or two EHT TB PPDUs in the requested TB FD-A-PPDU is the same as the BW indicated in the UL BW subfield. The BWP in the U-SIG field of the requested EHT TB PPDU and the BW in the U-SIG field of one or both EHT TB PPDUs in the requested TB FD-A-PPDU may be 20 MHz or 40 MHz or 80 MHz or 160 MHz. The Delta EHTUL BW subfield is set to 1 to indicate that the BW in the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or both EHT TB PPDUs in the requested TB FD-A-PPDU is the next available BW larger than the BW indicated in the UL BW subfield. The Delta EHT UL BW subfield is set to 2 to indicate that the BW in the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or both EHT TB PPDUs in the requested TB FD-A-PPDU is the second next available BW larger than the BW indicated in the UL BW subfield. The Delta EHT UL BW subfield is set to 3 to indicate that the BW in the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or both EHT TB PPDUs in the requested TB FD-A-PPDU is the next available BW smaller than the BW indicated in the UL BW subfield.For example, when the UL BW subfield is set to indicate an 80MHz BW and the Delta EHT UL BW subfield is set to 0, the BW of the U-SIG field of the requested EHT TB PPDU or the U-SIG field of one or two EHT TB PPDUs in the requested TB FD-A-PPDU is 80MHz. When the UL BW subfield is set to indicate an 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 EHT TB PPDUs in the requested TB FD-A-PPDU is 160MHz. When the UL BW subfield is set to indicate 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 both EHT TB PPDUs in the requested TB FD-A-PPDU is 320MHz. When the UL BW subfield is set to indicate 160MHz 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 both EHT TB PPDUs in the requested TB FD-A-PPDU is 80MHz. The valid combinations of UL BW subfield indication and Delta EHT UL BW subfield values ​​are shown in Table 11.

[0116] Table 11: Valid combinations of UL BW subfield indication and Delta EHT UL BW subfield value according to the third embodiment

[0117]

[0118] When 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. As an example, Fig. 9The trigger frame with the common information field shown in can be used to request HE TB PPDU transmission from HE STA, EHT TB PPDU transmission from EHT STA, or TB FD-A-PPDU transmission from HE STA and EHT STA. And each TB PPDU scheduled to be transmitted by HE STA is HE TB PPDU, and each TB PPDU scheduled to be transmitted by EHTSTA is HE TB PPDU or EHT TB PPDU. For example, when the trigger frame is used to request 160MHz HE TB PPDU transmission from HE STA, the enhanced trigger frame flag subfield is set to indicate 802.11ax trigger frame and the ULBW subfield is set to indicate 160 / 80+80MHz bandwidth. For another example, when the trigger frame is used to request a 320 MHz 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 80 MHz BW, and the Delta EHT UL BW subfield is set to 2. When the trigger frame is used to request a FD-A-PPDU 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 the Delta EHT UL BW subfield are set according to the BW and BW allocation options of the FD-A-PPDU as shown in Table 12.

[0119] It can be observed from Table 12 that, for BW allocation option 1A of 320MHz BW TB FD-A-PPDU, the BW allocated to one HE TB PPDU is 80MHz, and the BW allocated 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 allocation option 1B of 320MHz BW TB FD-A-PPDU, the BW allocated to one HE TB PPDU is 160MHz, and the BW allocated 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. In the case of BW allocation option 1C for 320MHz BW TB FD-A-PPDU, the BW allocated to one HE TB PPDU is 80MHz, and the BW allocated to each of two EHT TB PPDUs is 80MHz. Therefore, the UL BW subfield is set to indicate 80MHz BW, and the Delta EHT UL BW subfield is set to 0. In the case of BW allocation option 1D for 320MHz BW TB FD-A-PPDU, the BW allocated to one HE TB PPDU is 160MHz, and the BW allocated to one EHT TB PPDU is 160MHz. Therefore, the UL BW subfield is set to indicate 160MHz BW, and the Delta EHT UL BW subfield is set to 0. In the case of BW allocation option 1E for 320MHz BW TB FD-A-PPDU, the BW allocated to one HE TB PPDU is 80MHz, and the BW allocated to one EHT TB PPDU is 240MHz. Therefore, the UL BW subfield is set to indicate 80 MHz BW because there is no 240 MHz EHT TB PPDU and the 240 MHz transmission is obtained by puncturing the 80 MHz band from the 320 MHz EHT TB PPDU, so the Delta EHT ULBW subfield is set to 2.

[0120] Table 12: Settings of the UL BW subfield and the Delta EHT UL BW subfield when a trigger frame is used to request FD-A-PPDU transmission according to the third embodiment.

[0121]

[0122] 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 allocation option, the BW in the HE-SIG-A field of one HE TB PPDU is the same as its allocated BW, and the BW in the U-SIG field of one or two EHT TB PPDUs is the same as their respective allocated BWs.

[0123] Compared with the second embodiment in which the common information field of the trigger frame includes a 3-bit EHT UL BW subfield, due to the 2-bit Delta EHT UL BW subfield, one reserved bit is available in the common information field of the trigger frame of the third embodiment.

[0124] According to the present invention, the common information field of the trigger frame includes a UL BW subfield and a subfield.

[0125] In a first aspect, when a trigger frame is used to request TB FD-A-PPDU transmission, wherein the requested TB FD-A-PPDU 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; the BW indicated in the UL BW subfield may be equal to half of the BW of the requested TB FD-A-PPDU. When a 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.

[0126] In a second aspect, when the trigger frame is used to request TB FD-A-PPDU transmission or EHT TB PPDU transmission, the UL BW subfield indicates the BW in the HE-SIG-A field of one HE TB PPDU in the requested TB FD-A-PPDU, and the subfield indicates the BW in the U-SIG field of one or two EHT TB PPDUs in the requested TB FD-A-PPDU or the U-SIG field of the requested EHT TB PPDU. The UL BW subfield and the value of the subfield can be set according to the BW and BW allocation of the requested TB FD-A-PPDU.

[0127] In a third aspect, when the trigger frame is used to request TB FD-A-PPDU transmission or EHT TB PPDU transmission, the UL BW subfield indicates the BW in the HE-SIG-A field of one HE TB PPDU in the requested TB FD-A-PPDU, 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-PPDU or the U-SIG field of the requested EHT TB PPDU.

[0128] Various embodiments of the present invention further provide a computer program product. The computer program product includes instructions, and when the instructions are executed on a computer, the computer is caused to perform the method for requesting PPDU transmission in a WLAN according to any one of the embodiments of the present invention.

[0129] Various embodiments of the invention further provide a computer program. The computer program includes instructions, and when the instructions are executed on a computer, the computer is caused to perform a method for requesting PPDU transmission in a WLAN according to any one of the embodiments of the present invention.

[0130] Various embodiments of the present invention further provide a non-volatile storage medium. The non-volatile storage medium includes a computer program code, and when the computer program code is executed on a computer, the computer executes the method for requesting PPDU transmission in a WLAN according to any embodiment of the present invention.

[0131] Various embodiments of the present invention further provide a chip. The chip is configured to, when executed thereon, perform the method for requesting PPDU transmission in a WLAN according to any one of the embodiments of the present invention.

[0132] It should be understood that the above embodiments and features should be considered as exemplary rather than restrictive. Many other embodiments will be apparent to those skilled in the art by considering the specification and practice of the present invention. Therefore, the scope of the present invention should be determined with reference to the appended claims, and the full range of equivalents granted by these claims. In addition, the use of certain terms is for the purpose of describing clearly, rather than for limiting the embodiments disclosed in the present invention.

Claims

1. A method for requesting transmission of a physical layer protocol data unit (PPDU) in a wireless local area network (WLAN), the method comprising: The access point AP generates a trigger frame based on the type of PPDU transmission to be requested from multiple stations STA in the WLAN, wherein the type of the PPDU transmission includes HE TB PPDU transmission from a high-efficiency HE STA and EHTTB PPDU transmission from an extremely high throughput EHT STA. Two subfields in the trigger frame indicate the bandwidth BW of the requested PPDU, and the two subfields include an uplink UL bandwidth BW subfield and a delta EHT UL BW subfield. The common information field of the trigger frame also includes an enhanced trigger frame flag subfield, which is used to indicate whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame. When the enhanced trigger frame flag subfield indicates that the trigger frame is an enhanced trigger frame, the UL BW subfield and the Delta EHT UL BW subfield jointly indicate the BW of the requested EHT TB PPDU; wherein the Delta EHT UL BW subfield occupies 2 bits of the enhanced trigger frame, and the UL BW subfield occupies 2 bits in the common information field of the trigger frame; The AP transmits the generated trigger frame to the multiple STAs.

2. The method according to claim 1, wherein: The BW of the requested HE TB PPDU indicated by the UL BW subfield is located in the HE SIGNAL A (HE SIG-A) field of the requested HE TB PPDU.

3. The method according to claim 1, wherein: The bandwidth (BW) of the requested EHT TB PPDU indicated by both the UL BW subfield and the Delta EHT UL BW subfield is located in a Universal SIGNAL (U-SIG) field of the requested EHT TB PPDU.

4. The method according to claim 1, wherein: The requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz.

5. The method according to claim 1, wherein: When the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, the requested BW of the EHT TB PPDU is the same as the requested BW of the HE TB PPDU.

6. The method according to claim 1, wherein: When the requested BW of the EHT TB PPDU is 40 MHz, 80 MHz, 160 MHz, or 320 MHz, the requested BW of the EHT TB PPDU is the next available BW that is larger than the requested BW of the HE TB PPDU.

7. The method according to claim 1, wherein: When the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, or 80 MHz, the requested BW of the EHT TB PPDU is the next available BW that is smaller than the requested BW of the HE TB PPDU.

8. The method according to claim 1, wherein: The enhanced trigger frame includes a common information field and a user information list field including one or more user information fields.

9. The method according to claim 1, wherein: The requested BW of the HE TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 / 80+80 MHz.

10. The method according to any one of claims 1 to 9, wherein: The plurality of STAs include a plurality of HESTAs and / or a plurality of EHT STAs.

11. A method for responding to physical layer protocol data unit (PPDU) transmission in a wireless local area network (WLAN), the method comprising: The station STA receives a trigger frame, where the trigger frame is generated based on the type of PPDU transmission that the access point AP is to request from multiple STAs in the WLAN, where the type of the PPDU transmission includes HE TB PPDU transmission from a high-efficiency HE STA and EHT TB PPDU transmission from an extremely high throughput EHT STA, and two subfields in the trigger frame indicate the bandwidth BW of the requested PPDU, where the two subfields include an uplink UL bandwidth BW subfield and a delta EHT UL BW subfield; the common information field of the trigger frame also includes an enhanced trigger frame flag subfield, which is used to indicate whether the trigger frame is an 802.11ax trigger frame or an enhanced trigger frame; When the enhanced trigger frame flag subfield indicates that the trigger frame is an enhanced trigger frame, the UL BW subfield and the Delta EHT UL BW subfield jointly indicate the BW of the requested EHT TB PPDU; wherein the Delta EHT UL BW subfield occupies 2 bits of the enhanced trigger frame, and the UL BW subfield occupies 2 bits in the common information field of the trigger frame; The STA sends the requested PPDU in the BW indicated by one or both subfields in the trigger frame.

12. The method according to claim 11, wherein: The BW of the requested HE TB PPDU indicated by the UL BW subfield is located in the HE SIGNAL A field of the requested HE TB PPDU.

13. The method according to claim 11, wherein: The bandwidth (BW) of the requested EHT TB PPDU indicated by both the UL BW subfield and the Delta EHT UL BW subfield is located in the General SIGNAL field of the requested EHT TB PPDU.

14. The method according to claim 11, wherein: The requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz.

15. The method according to claim 11, wherein: When the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 MHz, the requested BW of the EHT TB PPDU is the same as the indicated BW of the requested HE TB PPDU.

16. The method according to claim 11, wherein: When the requested BW of the EHT TB PPDU is 40 MHz, 80 MHz, 160 MHz, or 320 MHz, the requested BW of the EHT TB PPDU is the next available BW that is larger than the requested BW of the HE TB PPDU.

17. The method according to claim 11, wherein: When the requested BW of the EHT TB PPDU is 20 MHz, 40 MHz, or 80 MHz, the requested BW of the EHT TB PPDU is the next available BW that is smaller than the requested BW of the HE TB PPDU.

18. The method according to claim 11, wherein: The enhanced trigger frame includes a common information field and a user information list field including one or more user information fields.

19. The method according to claim 11, wherein: The requested BW of the HE TB PPDU is 20 MHz, 40 MHz, 80 MHz, or 160 / 80+80 MHz.

20. The method according to any one of claims 11 to 19, wherein: The plurality of STAs include a plurality of HE STAs and / or a plurality of EHT STAs.

21. An AP, comprising: A memory and a processor, wherein the memory stores instructions, and the processor executes the instructions to implement the method for requesting PPDU transmission in a WLAN according to any one of claims 1 to 10.

22. A STA, comprising: A memory and a processor, wherein the memory stores instructions, and the processor executes the instructions to implement the method for responding to PPDU transmission in a WLAN according to any one of claims 11 to 20.

23. A chip, configured to execute the method for requesting PPDU transmission in a WLAN according to any one of claims 1 to 10.

24. A chip configured to execute the method for responding to PPDU transmission in a WLAN according to any one of claims 11 to 20.

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