Method and apparatus for determining spatial multiplexing parameter indication and spatial multiplexing parameter field

Abstract

This application relates to the field of wireless communication and is applied to a wireless local area network supporting the 802.11be standard. In particular, it relates to a method for determining spatial parameters in a trigger frame and corresponding spatial multiplexing parameter fields in a PPDU, and related devices. The method includes: An access point AP sends a trigger frame, and the trigger frame is used to trigger a station to send a trigger-based extremely high throughput physical layer protocol data unit EHT TB PPDU; The station determines the value indicated by the spatial multiplexing parameter SRP in the general signaling field U-SIG of the EHT TB PPDU based on one or more values indicated by the uplink spatial multiplexing parameter UL SRP fields in the common information field of the trigger frame, and / or one or two values indicated by the uplink EHT spatial multiplexing parameter UL EHT SRP. The STA sends the EHT TB PPDU to the AP. Implementing the embodiments of this application can set the spatial multiplexing parameter field of the EHT TB PPDU without changing the frame structure of the U-SIG.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a method for indicating spatial multiplexing parameters, a method for determining a spatial multiplexing parameter field in a corresponding physical layer protocol data unit (PPDU), a trigger frame transmission method, a PPDU transmission method, and related apparatuses. Background Art

[0002] Wireless local area networks (WLANs) have evolved through multiple generations, including 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, and 802.11be which is currently under discussion. Among them, the 802.11ax standard can be called the high efficient (HE) standard, and the 802.11be standard can be called the extremely high throughput (EHT) standard or Wi-Fi 7 standard. Different from 802.11ax, 802.11be will adopt an ultra-wide bandwidth, such as 320 MHz, to achieve an ultra-high transmission rate and support scenarios with ultra-dense users. Hereinafter, a station that supports the 802.11ax standard but does not support the 802.11be standard is simply referred to as an HE station, and a station that supports the 802.11be standard is simply referred to as an EHT station.

[0003] WLAN devices of 802.11ax (such as access points (APs) and stations (STAs)) can only support half-duplex transmission, that is, on the same spectral width or channel, only one device can send information, and other devices can only receive signals but cannot send, in order to avoid interference to the current sending device. However, as the density of WLAN devices increases, the situation where one basic service set (BSS) overlaps with another BSS becomes more and more common, that is, the situation of overlapping basic service sets (Overlapping BSS, OBSS) becomes more and more common. Because WLAN devices located in the OBSS can receive physical protocol data units (physical protocol data unit, PPDU, also known as data packets or data groups) from two BSSs, if the traditional method is used, it will lead to low transmission efficiency. Therefore, 802.11ax proposes a spatial reuse method. By adaptively adjusting the transmit power, WLAN devices in the overlapping basic service set can transmit simultaneously, greatly improving the transmission efficiency. Specifically, 802.11ax introduces spatial reuse in the trigger frame-based uplink scheduling transmission method. When a station sends a high efficient trigger based physical layer protocol data unit (HE TB PPDU), it copies the values of the 4 uplink spatial reuse parameter (UL SRP) fields (which can also be called uplink parameterized spatial reuse (UL PSR) fields) in the uplink spatial reuse (UL spatial reuse) field of the common information field of the received trigger frame one by one into the 4 spatial reuse parameter (SRP) fields included in the high efficient signal field A (HE-SIG-A) of the HE TB PPDU).

[0004] However, the 802.11be standard will follow the trigger frame-based uplink scheduling transmission method in the 802.11ax standard, but how to design the trigger frame to schedule EHT stations, or to schedule HE stations and EHT stations simultaneously, has become an urgent problem to be solved. Summary of the Invention

[0005] Embodiments of the present application provide a method and related device for indicating spatial multiplexing parameters in a trigger frame, and a method and related device for determining a spatial multiplexing parameter field in a PPDU. The technical solution provided by the embodiments of the present application can, in the scenario where a trigger frame schedules EHT stations, or schedules HE stations and EHT stations simultaneously, without changing the frame structure of the EHT TB PPDU, and set one or two of the spatial multiplexing parameter field and the U-SIG reservation field in the EHT TB PPDU according to the trigger frame.

[0006] The present application is introduced from different aspects below. It should be understood that the implementation manners and beneficial effects of the different aspects below can be referred to each other.

[0007] In a first aspect, the present application provides a method for indicating spatial multiplexing parameters in a trigger frame, including:

[0008] An access point AP sends a trigger frame, and the trigger frame is used to trigger a station to send a trigger-based extremely high throughput physical layer protocol data unit EHT TB PPDU;

[0009] The AP receives the EHT TB PPDU sent by the station, and the value indicated by the spatial multiplexing parameter SRP in the common signaling field U-SIG of the EHT TB PPDU is determined based on one or more values indicated by the uplink spatial multiplexing parameter UL SRP fields in the common information field of the trigger frame, and / or one or two values indicated by the uplink EHT spatial multiplexing parameter UL EHT SRP.

[0010] Optionally, the trigger frame is further used to trigger the station to send an HE TB PPDU. The values of the 4 SRP fields included in the HE-SIG-A of the HE TB PPDU are respectively copied from the values of the above 4 UL SRP fields. Wherein, the length of each UL SRP field is 4 bits, and the length of each SRP field in the HE-SIG-A is also 4 bits.

[0011] When implementing the method provided in the first aspect of the present application, on the one hand, without changing the content of the trigger frame (i.e., without changing the UL SRP value in the trigger frame), the HE station can set the spatial multiplexing parameters in the original manner, without increasing the signaling overhead of the trigger frame, and for the HE station, there is no loss in granularity. On the other hand, without changing the frame structure of the U-SIG of the EHT TB PPDU, based on the values indicated by one field or two fields in the 4 UL SRP fields in the trigger frame, the spatial multiplexing parameters in the U-SIG of the EHT TB PPDU are set, so that the trigger frame can schedule the EHT station to send an uplink EHT TB PPDU, and it can also enable the HE station and the EHT station to be scheduled under the same trigger frame; in addition, the U-SIG reserved field in the U-SIG of the EHT TB PPDU can be set to the default value.

[0012] In a second aspect, the present application provides a method for determining a spatial multiplexing parameter field in a PPDU, the method comprising: a station STA receives a trigger frame for triggering the station to send an extremely high throughput physical layer protocol data unit EHT TB PPDU;

[0013] The STA sends an EHT TB PPDU, and the value indicated by the SRP in the U-SIG of the EHT TB PPDU is determined based on the value indicated by one or more UL SRP fields in the common information field of the trigger frame and one or two of the values indicated by the uplink EHT spatial multiplexing parameter UL EHT SRP.

[0014] Optionally, the trigger frame is further used to trigger the station to send a HE TB PPDU. The values of the 4 SRP fields included in the HE-SIG-A of the HE TB PPDU are respectively copied from the values of the above 4 UL SRP fields. Among them, the length of each UL SRP field is 4 bits, and the length of each SRP field in the HE-SIG-A is also 4 bits.

[0015] Implementing the method provided in the second aspect of the present application, on the one hand, without changing the content of the trigger frame (i.e., without changing the UL SRP value in the trigger frame), the HE station can set the spatial multiplexing parameters in the original manner, without increasing the signaling overhead of the trigger frame, and for the HE station, there is no loss in granularity. On the other hand, without changing the frame structure of the U-SIG of the EHT TB PPDU, based on the values indicated by one or two fields among the 4 UL SRP fields in the trigger frame, the spatial multiplexing parameters in the U-SIG of the EHT TB PPDU are set, so that the trigger frame can schedule the EHT station to send the uplink EHT TB PPDU, and it can also enable the HE station and the EHT station to be scheduled under the same trigger frame; in addition, the U-SIG reserved field in the U-SIG of the EHT TB PPDU can be set to the default value.

[0016] In a third aspect, the present application provides a communication device applicable to a wireless local area network (WLAN). The communication device can be an access point (AP) or a chip in the access point (AP), and it includes:

[0017] A processor, configured to generate a trigger frame;

[0018] A transceiver, configured to send the trigger frame, where the trigger frame is used to trigger a station to send a triggered extremely high throughput physical layer protocol data unit (EHT TB PPDU);

[0019] The transceiver is configured to receive the EHT TB PPDU sent by the station. The value indicated by the spatial multiplexing parameter (SRP) in the general signaling field (U-SIG) of the EHT TB PPDU is determined based on one or more values indicated by the uplink spatial multiplexing parameter (UL SRP) fields in the common information field of the trigger frame, or one or two values indicated by the uplink EHT spatial multiplexing parameter (UL EHT SRP).

[0020] The communication device provided in the third aspect can implement the method provided in the first aspect above and achieve the corresponding technical effects, which will not be elaborated here.

[0021] In a fourth aspect, the present application provides a communication device applicable to a wireless local area network (WLAN), including:

[0022] A transceiver, configured to receive a trigger frame, where the trigger frame is used to trigger the communication device to send an extremely high throughput physical layer protocol data unit (EHT TB PPDU);

[0023] A processor for generating the EHT TB PPDU; the value indicated by the SRP in the U-SIG of the EHT TB PPDU is determined based on one or more values indicated by the UL SRP fields in the common information field of the trigger frame, and / or one or two values indicated by the uplink EHT spatial multiplexing parameter UL EHT SRP;

[0024] The transceiver is configured to transmit the EHT TB PPDU.

[0025] The communication device provided in the fourth aspect can implement the method provided in the second aspect and achieve the corresponding technical effects, which will not be elaborated here.

[0026] In the first implementation manner of the method provided in the first aspect or the second aspect, and the communication device provided in the third aspect or the fourth aspect, in the common information field of the trigger frame, there are 4 uplink spatial multiplexing parameter UL SRP fields, which are respectively the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field; the U-SIG of the EHT TB PPDU includes one SRP field, and the value of the one SRP field is equal to the minimum value among the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field; or, the value of the one SRP field is equal to any one of the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field.

[0027] In the second implementation manner of the method provided in the first aspect or the second aspect, and the communication device provided in the third aspect or the fourth aspect, the UL EHT SRP field is located in the reserved field of the common information field; the U-SIG of the EHT TB PPDU includes one SRP field, and the value of the one SRP field is equal to the value indicated by the UL EHT SRP field.

[0028] In the third implementation manner of the method provided in the first aspect or the second aspect, and the communication device provided in the third aspect or the fourth aspect, in the common information field of the trigger frame, there are 4 uplink spatial multiplexing parameter UL SRP fields, and the 4 UL SRP fields are respectively a UL SRP1 field, a UL SRP2 field, a UL SRP3 field, and a UL SRP4 field; the UL EHT SRP field is located in the reserved field of the common information field; the EHT TB PPDU is a non-aggregated PPDU, and its U-SIG includes two SRP fields, namely an SRP1 field and an SRP2 field; the value of the SRP1 field is equal to the minimum value or any value of the values indicated by the UL SRP1 field and the UL SRP2 field; the value of the SRP2 field is equal to the minimum value or any value of the values indicated by the UL SRP3 field and the UL SRP4 field.

[0029] In the fourth implementation manner of the method provided in the first aspect or the second aspect, and the communication device provided in the third aspect or the fourth aspect, in the common information field of the trigger frame, there are 4 uplink spatial multiplexing parameter UL SRP fields, and the 4 UL SRP fields are respectively a UL SRP1 field, a UL SRP2 field, a UL SRP3 field, and a UL SRP4 field; the UL EHT SRP field is located in the reserved field of the common information field; the bandwidth of the EHT TB PPDU is 320 MHz or the EHT TB PPDU is a partial PPDU of an aggregated PPDU, and its U-SIG includes two SRP fields, namely an SRP1 field and an SRP2 field, and the value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value or any value of the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field.

[0030] In the fifth implementation manner of the method provided in the first or second aspect and the communication device provided in the third or fourth aspect, in the common information field of the trigger frame, there are 4 uplink spatial multiplexing parameter UL SRP fields, and the 4 UL SRP fields are respectively a UL SRP1 field, a UL SRP2 field, a UL SRP3 field, and a UL SRP4 field; the UL EHT SRP field is located in the reserved field of the common information field; the bandwidth of the EHT TB PPDU is 320 MHz or the EHT TB PPDU is a partial PPDU of an aggregated PPDU, and its U-SIG includes two SRP fields, namely an SRP1 field and an SRP2 field, and the value of the SRP1 field is equal to the minimum value or any value among the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field; the value of the SRP2 field is equal to the value of the UL EHT SRP field.

[0031] In the sixth implementation manner of the method provided in the first or second aspect and the communication device provided in the third or fourth aspect, the U-SIG of the EHT TB PPDU further includes a U-SIG reserved field; the value of the U-SIG reserved field is a default value.

[0032] In a fifth aspect, the present application provides a method for transmitting a trigger frame, and the method includes: an access point AP sends a trigger frame, and the trigger frame is used to trigger a station to send a trigger-based extremely high throughput physical layer protocol data unit EHT TB PPDU; the trigger frame further includes a U-SIG reserved indication field for indicating the value of the U-SIG reserved field in the EHT TB PPDU.

[0033] The AP receives the EHT TB PPDU sent by the station, and the value of the U-SIG reserved field in the U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reserved indication field of the trigger frame.

[0034] Optionally, the trigger frame is further used to trigger the station to send a HE TB PPDU. The values of the 4 SRP fields included in the HE-SIG-A of the HE TB PPDU are respectively copied from the values of the above 4 UL SRP fields. Among them, the length of each UL SRP field is 4 bits, and the length of each SRP field in the HE-SIG-A is also 4 bits.

[0035] This solution enables the trigger frame to schedule an EHT station to send an uplink EHT TB PPDU and set the value of the U-SIG reserved field therein according to the indication of the trigger frame by using the trigger frame to indicate the value of the U-SIG reserved field in the EHT TB PPDU, and also enables HE stations and EHT stations to be scheduled under the same trigger frame.

[0036] In a sixth aspect, the present application provides a method for determining a spatial multiplexing parameter field in a physical layer protocol data unit PPDU. The method includes: a station STA receives a trigger frame, where the trigger frame is used to trigger the station to send an EHT TB PPDU; the trigger frame further includes a U-SIG reservation indication field for indicating the value of the U-SIG reserved field in the EHT TB PPDU;

[0037] The STA sends an EHT TB PPDU, and the value of the U-SIG reserved field in the general signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field of the trigger frame.

[0038] Optionally, the trigger frame is further used to trigger the station to send an HE TB PPDU. The values of the 4 SRP fields included in the HE-SIG-A of the HE TB PPDU are respectively copied from the values of the above 4 UL SRP fields. Wherein, the length of each UL SRP field is 4 bits, and the length of each SRP field in the HE-SIG-A is also 4 bits.

[0039] In a seventh aspect, the present application provides a communication device applied to a wireless local area network WLAN. The communication device can be an AP or a chip in the AP, such as a Wi-Fi chip. The communication device includes:

[0040] A processor for generating a trigger frame, where the trigger frame is used to trigger a station to send a triggered extremely high throughput physical layer protocol data unit EHT TB PPDU; the trigger frame further includes a U-SIG reservation indication field for indicating the value of the U-SIG reserved field in the EHT TB PPDU;

[0041] A transceiver for sending the trigger frame;

[0042] The transceiver is further configured to receive the EHT TB PPDU sent by the station, and the value of the U-SIG reserved field in the general signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field of the trigger frame.

[0043] Optionally, the trigger frame is further used to trigger the station to send an HE TB PPDU. The values of the 4 SRP fields included in the HE-SIG-A of the HE TB PPDU are respectively copied from the values of the above 4 UL SRP fields. Wherein, the length of each UL SRP field is 4 bits, and the length of each SRP field in the HE-SIG-A is also 4 bits.

[0044] In an eighth aspect, the present application provides a communication device applied to a wireless local area network (WLAN). The communication device may be a STA or a chip in the STA, such as a Wi-Fi chip. The communication device includes: a transceiver, configured to receive a trigger frame, where the trigger frame is used to trigger the station to send an EHT TB PPDU; the trigger frame further includes a U-SIG reservation indication field for indicating the value of the U-SIG reservation field in the EHT TB PPDU;

[0045] a processor, configured to generate the EHT TB PPDU, where the value of the U-SIG reservation field in the common signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field of the trigger frame;

[0046] the transceiver is further configured to send the EHT TB PPDU, where the value of the U-SIG reservation field in the common signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field of the trigger frame.

[0047] Optionally, the trigger frame is further used to trigger the station to send an HE TB PPDU. The values of the 4 SRP fields included in the HE-SIG-A of the HE TB PPDU are respectively copied from the values of the above 4 UL SRP fields. Wherein, the length of each UL SRP field is 4 bits, and the length of each SRP field in the HE-SIG-A is also 4 bits.

[0048] In a first implementation manner of the method provided in the fifth or sixth aspect above, and the communication device provided in the seventh or eighth aspect above, the U-SIG reservation indication field is located in a special user information field of the user information list field of the trigger frame.

[0049] In a second implementation manner of the method provided in the fifth or sixth aspect above, and the communication device provided in the seventh or eighth aspect above, the associated identifier AID12 of the special user information field is a preset value or an incomplete AID12 value.

[0050] In the third implementation manner of the method provided in the fifth or sixth aspect above, and in the communication device provided in the seventh or eighth aspect above, the special user information field further includes: a UL SRP field for U-SIG; or two UL SRP fields for U-SIG.

[0051] In the fourth implementation manner of the method provided in the fifth or sixth aspect above, and in the communication device provided in the seventh or eighth aspect above, the common information field of the trigger frame includes 4 uplink spatial multiplexing parameter UL SRP fields; or the common information field of the trigger frame further includes an uplink EHT spatial multiplexing parameter UL EHT SRP field located in the reserved field of the common information field.

[0052] In a ninth aspect, the present application provides a method for indicating spatial multiplexing parameters by a trigger frame. The method includes: an AP sending a trigger frame, where the trigger frame is used to trigger a station to send an EHT TB PPDU; the AP receiving the EHT TB PPDU sent by the station. Among them, the trigger frame carries first indication information, and the first indication information is used to indicate the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU. The value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU is determined based on the first indication information.

[0053] In a tenth aspect, the present application provides a method for determining a spatial multiplexing parameter field in a PPDU. The method includes: a STA receiving a trigger frame, where the trigger frame is used to trigger a station to send an EHT TB PPDU; the STA sending the EHT TB PPDU. Among them, the trigger frame carries first indication information, and the first indication information is used to indicate the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU. The value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU is determined based on the first indication information.

[0054] In an eleventh aspect, the present application provides a communication device applied to a WLAN. The communication device is an access point AP or a chip in the AP, and includes:

[0055] a processor, configured to generate a trigger frame; the trigger frame is used to trigger a station to send an EHT TB PPDU; the AP receives the EHT TB PPDU sent by the station. Among them, the trigger frame carries first indication information, and the first indication information is used to indicate the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU. The value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU is determined based on the first indication information.

[0056] A transceiver for sending a trigger frame.

[0057] In a twelfth aspect, the present application provides a communication device applied to WLAN. The communication device is a station STA or a chip in the STA, and includes:

[0058] A transceiver for receiving a trigger frame, where the trigger frame is used to trigger the station to send an EHT TB PPDU; the trigger frame carries first indication information, and the first indication information is used to indicate the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU.

[0059] A processor for generating an EHT TB PPDU, where the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU is determined based on the first indication information;

[0060] The transceiver is further configured to send the EHT TB PPDU.

[0061] In a first implementation manner of the method provided in the ninth aspect or the tenth aspect, and the communication device provided in the eleventh aspect or the twelfth aspect, the first indication information is located in the common information field of the trigger frame, and the common information field includes 4 UL SRP fields, and the 4 UL SRP fields are respectively used to indicate the values of 4 SRP fields in the HE TB PPDU.

[0062] In a second implementation manner of the method provided in the ninth aspect or the tenth aspect, and the communication device provided in the eleventh aspect or the twelfth aspect, the first indication information is located in the common information field of the trigger frame, and the common information field includes a UL EHT SRP field, and the UL EHT SRP field individually indicates or together with the 4 UL SRP fields indicates the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TBPPDU.

[0063] In a third implementation manner of the method provided in the ninth aspect or the tenth aspect, and the communication device provided in the eleventh aspect or the twelfth aspect, the first indication information is located in the UL SRP field of the user information field of the trigger frame.

[0064] In a fourth implementation manner of the method provided in the ninth aspect or the tenth aspect, and the communication device provided in the eleventh aspect or the twelfth aspect, a part of the first indication information is located in the 4 UL SRP fields of the common information field of the trigger frame, and a part is located in the UL SRP field of the special user information field of the trigger frame; where the 4 UL SRP fields and the UL SRP field located in the special user information field together indicate the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU.

[0065] For the method provided by the ninth aspect or the tenth aspect, and the communication device provided by the eleventh aspect or the twelfth aspect, in the fifth implementation manner, a part of the first indication information is located in the common information field of the above trigger frame, the common information field includes a UL EHT SRP field, and a part is located in the UL SRP field of the special user information field of the trigger frame; where the UL EHT SRP field and the UL SRP field located in the special user information field together indicate the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU.

[0066] For the method provided by the ninth aspect or the tenth aspect, and the communication device provided by the eleventh aspect or the twelfth aspect, in the sixth implementation manner, the first indication information is located in the special user information field of the above trigger frame.

[0067] For the method provided by the ninth aspect or the tenth aspect, and the communication device provided by the eleventh aspect or the twelfth aspect, in the seventh implementation manner, the value of the AID12 field of the special user information field is a preset value or an incomplete AID12 value.

[0068] For the method provided by the ninth aspect or the tenth aspect, and the communication device provided by the eleventh aspect or the twelfth aspect, in the eighth implementation manner, the trigger frame is further used to trigger the station to send a HE TB PPDU. The values of the 4 SRP fields included in the HE-SIG-A of the HE TB PPDU are respectively copied from the values of the above 4 UL SRP fields. Among them, the length of each UL SRP field is 4 bits, and the length of each SRP field in the HE-SIG-A is also 4 bits.

[0069] This solution uses a certain special user information field in the trigger frame to make a separate indication of the spatial multiplexing parameters for the EHT TB PPDU, with clear meaning and without affecting the scheduling of HE stations, and can schedule HE stations and EHT stations under the same trigger frame.

[0070] In an implementation manner of any of the above aspects, the total bandwidth of the EHT TB PPDU is 320 MHz.

[0071] In the thirteenth aspect, the present application provides a spatial multiplexing method, and the method includes: the communication device determines the transmission power of the PPDU according to one or more of the values indicated by the SRP1 field and the SRP2 field included in the U-SIG of the EHT TBPPDU, the values indicated by the 4 UL SRP fields included in the common information field of the trigger frame, and the value indicated by the UL EHT SRP in the common information field of the trigger frame; the communication device sends the PPDU according to the transmission power of the PPDU.

[0072] Among them, the communication device can be either an AP or an STA. When the communication device is an AP, the above PPDU is a parameterized spatial reuse reception (PSRR) PPDU. When the communication device is an STA, the above PPDU is a response frame in response to the PSRR PPDU.

[0073] In a fourteenth aspect, the present application provides a communication device, which can be an AP or an STA. Further, the communication device can be a chip in the AP or STA, such as a Wi-Fi chip. The communication device includes: a determination unit, configured to determine the transmission power of the PPDU according to the values indicated by the SRP1 field and the SRP2 field included in the U-SIG of the EHT TB PPDU, and / or the values indicated by the 4 UL SRP fields included in the common information field of the trigger frame; a transceiver unit, configured to transmit the PPDU according to the transmission power of the PPDU.

[0074] Among them, the communication device can be either an AP or an STA. When the communication device is an AP, the above PPDU is a PSRR PPDU. When the communication device is an STA, the above PPDU is a response frame in response to the PSRR PPDU.

[0075] In a first implementation manner of the method in the thirteenth aspect or the communication device in the fourteenth aspect, before the communication device determines the transmission power of the PPDU, the method further includes: the communication device receives a trigger frame, and the trigger frame includes 4 UL SRP fields. The value indicated by one UL SRP field is the sum of the transmission power of the first AP on a sub-channel and the maximum interference power that the first AP can accept. The communication device and the first AP are located in the same overlapping basic service set (OBSS). Here, the "first AP" is the AP that sends the trigger frame and is also the AP in the method for determining the spatial reuse parameter field in the above PPDU. The communication device and the first AP are not the same device.

[0076] This solution provides a spatial reuse method for the EHT TB PPDU, which can be compatible with the case of 1 or 2 SRP fields in the U-SIG, implement spatial reuse in the EHT standard, and enable devices in the overlapping basic service set to transmit simultaneously, improving the transmission efficiency.

[0077] In a fifteenth aspect, the present application provides a device, which is implemented in the form of a functional unit product, including a processing unit and a transceiver unit. Among them, the processing unit is configured to implement the functions of the processor mentioned in any of the above aspects, and the transceiver unit is configured to implement the functions of the transceiver mentioned in any of the above aspects.

[0078] In a sixteenth aspect, the present application provides a device, which is implemented in the product form of a chip and includes an input / output interface and a processing circuit.

[0079] In a possible design, the device is a chip in the communication device of the third aspect, seventh aspect, eleventh aspect, or fourteenth aspect above. The communication device is an AP; the processing circuit in the chip is used to implement the processing functions performed on the AP side in the third aspect, seventh aspect, eleventh aspect, or fourteenth aspect above. In another implementation, the chip may further include the radio frequency circuit.

[0080] In a possible design, the device is a chip in the communication device of the fourth aspect, eighth aspect, twelfth aspect, or fourteenth aspect above. The communication device is a STA; the processing circuit in the chip is used to implement the processing functions performed on the AP side in the fourth aspect, eighth aspect, eleventh aspect, or fourteenth aspect above. In another implementation, the chip may further include the radio frequency circuit. In another implementation, the chip may further include the radio frequency circuit.

[0081] In a seventeenth aspect, the present application provides a computer-readable storage medium storing instructions that, when run on a computer, cause the computer to execute the methods described in the first aspect, second aspect, fifth aspect, sixth aspect, ninth aspect, tenth aspect, or thirteenth aspect above.

[0082] In an eighteenth aspect, the present application provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the methods described in the first aspect, second aspect, fifth aspect, sixth aspect, ninth aspect, tenth aspect, or thirteenth aspect above.

[0083] The embodiments of the present application do not change or increase the length of the U-SIG field of the EHT TB PPDU (the U-SIG field occupies 2 OFDM symbols, a total of 8 microseconds (us)), and set the spatial multiplexing parameter field of the EHT TB PPDU according to one or more of the indications of the 4 UL SRP fields in the trigger frame, the indication of the UL EHT SRP field in the trigger frame, and the indication of the special user information field of the trigger frame, so that HE stations and EHT stations can be scheduled under the same trigger frame and spatial multiplexing can be implemented in the EHT standard, enabling WLAN devices in an overlapping basic service set to transmit simultaneously and improving the transmission efficiency. Description of the Drawings

[0084] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments.

[0085] Figure 1 It is a schematic diagram of the architecture of the wireless communication system provided by the embodiments of the present application;

[0086] Figure 2a It is a schematic diagram of the structure of the access point provided by the embodiments of the present application;

[0087] Figure 2b It is a schematic diagram of the structure of the station provided by the embodiments of the present application;

[0088] Figure 3a It is a schematic diagram of an OBSS formed by partial overlap of one BSS and another BSS;

[0089] Figure 3b It is a schematic diagram of an OBSS formed by one BSS containing another BSS;

[0090] Figure 4 It is a schematic diagram of the uplink scheduling transmission method based on trigger frames in the 802.11ax standard;

[0091] Figure 5a It is a schematic diagram of the frame format of the trigger frame;

[0092] Figure 5b It is a schematic diagram of the frame formats of the common information field and the user information field in the trigger frame of 802.11ax;

[0093] Figure 6a It is a schematic diagram of one kind of the frame formats of the common information field and the user information field in the trigger frame of 802.11be;

[0094] Figure 6b It is a schematic diagram of the frame structure of the EHT TB PPDU;

[0095] Figure 7a It is the first schematic flowchart of the method for indicating spatial multiplexing parameters in the trigger frame provided by the embodiments of the present application, and the method for determining the spatial multiplexing parameter field in the corresponding PPDU;

[0096] Figure 7b It is as Figure 7a shown in the method, a schematic diagram of the relationship between the U-SIG SRP field and the UL SRP field;

[0097] Figure 8a It is the second schematic flowchart of the method for indicating spatial multiplexing parameters in the trigger frame provided by the embodiments of the present application, and the method for determining the spatial multiplexing parameter field in the corresponding PPDU;

[0098] Figure 8b In the method as shown Figure 8a Schematic diagram of the relationship between the U-SIG SRP1 field and the U-SIG SRP2 field and the UL SRP field;

[0099] Figure 9 Schematic diagram of the timing for triggering frames to schedule uplink data transmission of HE stations and EHT stations simultaneously provided by an embodiment of the present application;

[0100] Figure 10 Another schematic diagram of the frame format of the common information field and the user information field in the trigger frame of 802.11be;

[0101] Figure 11 The third schematic flowchart of the method for indicating spatial multiplexing parameters in the trigger frame provided by an embodiment of the present application, and the method for determining the spatial multiplexing parameter field in the PPDU;

[0102] Figure 12a It is Figure 11 Schematic diagram of the relationship between the U-SIG SRP field and the ULEHT SRP field in the method as shown;

[0103] Figure 12b It is Figure 11 Schematic diagram of the relationship between the U-SIG SRP1 field and the U-SIG SRP2 field and the UL SRP field in the method as shown;

[0104] Figure 12c It is Figure 11 Schematic diagram of the relationship between the U-SIG SRP1 field and the U-SIG SRP2 field and the UL SRP field in the method as shown;

[0105] Figure 13 Another schematic diagram of the frame format of the common information field and the user information field in the trigger frame of 802.11be;

[0106] Figure 14 A schematic flowchart of the trigger frame transmission method and the PPDU transmission method provided by an embodiment of the present application;

[0107] Figure 15a A schematic diagram of indicating the SRP of U-SIG in the trigger frame provided by an embodiment of the present application;

[0108] Figure 15b Another schematic diagram of indicating the SRP of U-SIG in the trigger frame provided by an embodiment of the present application;

[0109] Figure 16 A schematic flowchart of the spatial multiplexing method provided by an embodiment of the present application;

[0110] Figure 17 It is a timing schematic diagram of the spatial multiplexing method provided by the embodiments of the present application;

[0111] Figure 18 It is another schematic flowchart of the spatial multiplexing method provided by the embodiments of the present application;

[0112] Figure 19 It is a schematic structural diagram of communication device 1 provided by the embodiments of the present application;

[0113] Figure 20 It is a schematic structural diagram of communication device 2 provided by the embodiments of the present application;

[0114] Figure 21 It is a schematic structural diagram of communication device 3 provided by the embodiments of the present application;

[0115] Figure 22 It is a schematic structural diagram of communication device 1000 provided by the embodiments of the present application. Detailed implementation manners

[0116] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0117] To facilitate the understanding of the method provided by the embodiments of the present application, the system architecture and / or application scenario of the method provided by the embodiments of the present application will be described below. It can be understood that the system architecture and / or application scenario described in the embodiments of the present application are for more clearly explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application.

[0118] The embodiments of the present application provide a method for indicating spatial multiplexing parameters in a trigger frame, which can schedule EHT stations, or schedule HE stations and EHT stations simultaneously.

[0119] For the trigger frame of this embodiment, one implementation manner is: without changing its common information field, in the user information list field part, use a certain special user information field to separately indicate the spatial multiplexing parameters in the EHT TB PPDU; another implementation manner is: use some fields in its common information field to indicate the spatial multiplexing parameters in the EHT TB PPDU, so that there is no need to add a certain special user information field in the user information list field part. In yet another implementation manner, a certain special user information field is added in the user information list field part of the trigger frame to indicate the spatial multiplexing parameters in the EHT TB PPDU and the U-SIG reservation information.

[0120] For the above first two implementation manners, embodiments of the present application do not change or increase the length of the U-SIG field of the EHT TB PPDU (the U-SIG field occupies 2 OFDM symbols, a total of 8 microseconds (μs)). According to the 4 UL SRP fields in the trigger frame, or according to the UL EHT SRP field in the trigger frame, or according to the 4 UL SRP fields and the UL EHT SRP field, the spatial multiplexing parameter field of the EHT TB PPDU is set, so that HE stations and EHT stations can be scheduled under the same trigger frame, and spatial multiplexing can be implemented in the EHT standard, enabling WLAN devices in an overlapping basic service set to transmit simultaneously and improving the transmission efficiency.

[0121] The method for indicating spatial multiplexing parameters in a trigger frame and the method for determining the spatial multiplexing parameter field in a PPDU provided in this embodiment can be applied to a wireless communication system, such as a wireless local area network system. The method for determining the spatial multiplexing parameter field in the PPDU can be implemented by a communication device in a wireless communication system, or a chip or a processor in the communication device. The communication device can be an access point device or a station device; the communication device can also be a wireless communication device supporting parallel transmission of multiple links. For example, the communication device can be referred to as a multi-link device (MLD) or a multi-band device. Compared with a communication device that only supports single-link transmission, the multi-link device has higher transmission efficiency and larger throughput.

[0122] The method for indicating spatial multiplexing parameters in a trigger frame and the method for determining the spatial multiplexing parameter field in a PPDU provided in embodiments of the present application can be applied to the scenario of communication between an AP and one or more STAs, and can also be applied to the communication scenario between APs, and is also applicable to the communication scenario between STAs. See Figure 1 , Figure 1 is a schematic diagram of the architecture of the wireless communication system provided in embodiments of the present application. As Figure 1 shown, the wireless communication system may include one or more APs (such as Figure 1 AP1 and AP2 in Figure 1STA1, STA2, and STA3 in it), and AP1 and AP2 can be located within the same OBSS. Among them, both the AP and the STA support the WLAN communication protocol, which can include 802.11be (or Wi-Fi 7, EHT protocol), and can also include protocols such as 802.11ax and 802.11ac. Of course, with the continuous evolution and development of communication technologies, the communication protocol can also include the next-generation protocol of 802.11be, etc. Taking WLAN as an example, the device for implementing the method of this application can be an AP or a STA in WLAN, or a chip or processing system installed in the AP or STA.

[0123] Access points (such as Figure 1 AP1 or AP2 in it) are devices with wireless communication functions, supporting communication using the WLAN protocol, having the function of communicating with other devices (such as stations or other access points) in the WLAN network. Of course, they can also have the function of communicating with other devices. In the WLAN system, the access point can be called an access point station (AP STA). The device with wireless communication functions can be a whole-device device, or a chip or processing system installed in the whole-device device, etc. The device installing these chips or processing systems can, under the control of the chip or processing system, implement the methods and functions of the embodiments of this application. The AP in the embodiments of this application is a device that provides services for the STA and can support 802.11 series protocols. For example, the AP can be a communication entity such as a communication server, router, switch, bridge, etc.; the AP can include various forms of macro base stations, micro base stations, relay stations, etc. Of course, the AP can also be the chips and processing systems in these various forms of devices, so as to implement the methods and functions of the embodiments of this application.

[0124] Stations (such as Figure 1STA1, STA2, or STA3) in [the context] is a device with wireless communication capabilities, supporting communication using the WLAN protocol and having the ability to communicate with other stations or access points in the WLAN network. In a WLAN system, a station can be referred to as a non-access point station (non-AP STA). For example, an STA is any user communication device that allows a user to communicate with an AP and thus with the WLAN. This device with wireless communication capabilities can be a complete device, or it can be a chip or processing system installed in a complete device. The device installed with these chips or processing systems can, under the control of the chip or processing system, implement the methods and functions of the embodiments of this application. For example, an STA can be a tablet computer, desktop, laptop, notebook computer, Ultra-mobile Personal Computer (UMPC), handheld computer, netbook, Personal Digital Assistant (PDA), mobile phone, or other networkable user devices, or an Internet of Things (IoT) node in the IoT, or a vehicle communication device in a vehicle-to-everything (V2X) network, or an entertainment device, game device or system, Global Positioning System (GPS) device, etc. An STA can also be a chip and processing system in the above-mentioned terminals.

[0125] The WLAN system can provide high-rate and low-latency transmission. With the continuous evolution of WLAN application scenarios, the WLAN system will be applied to more scenarios or industries. For example, it can be applied to the IoT industry, the V2X industry, the banking industry, enterprise office, stadiums and exhibition halls, concert halls, hotel rooms, dormitories, wards, classrooms, shopping malls, squares, streets, production workshops, and warehouses, etc. Of course, devices supporting WLAN communication (such as access points or stations) can be sensor nodes in a smart city (such as smart water meters, smart electricity meters, smart air detection nodes), smart devices in a smart home (such as smart cameras, projectors, displays, televisions, speakers, refrigerators, washing machines, etc.), nodes in the IoT, entertainment terminals (such as AR, VR, and other wearable devices), smart devices in smart office (such as printers, projectors, loudspeakers, speakers, etc.), vehicle-to-everything (V2X) devices in a V2X network, infrastructure in daily life scenarios (such as vending machines, self-guided navigation desks in shopping malls, self-checkout devices, self-ordering machines, etc.), and devices in large sports and music venues. In the embodiments of this application, the specific forms of STAs and APs are not limited, and this is only an exemplary illustration here.

[0126] The 802.11 standard focuses on the physical layer (PHY) and the media access control (MAC) layer. In one example, refer toFigure 2a , Figure 2a is a schematic structural diagram of an access point provided by an embodiment of the present application. Among them, the AP can be multi-antenna / multi-radio frequency or single-antenna / single-radio frequency, and the antenna / radio frequency is used to send / receive data packets. In one implementation, the antenna or radio frequency part of the AP can be separated from the main body part of the AP, and is in a structure with a remote layout. Figure 2a In, the AP can include a physical layer processing circuit and a media access control processing circuit. The physical layer processing circuit can be used to process physical layer signals, and the MAC layer processing circuit can be used to process MAC layer signals. In another example, see Figure 3b , Figure 2b is a schematic structural diagram of a station provided by an embodiment of the present application. Figure 2b shows a schematic structural diagram of a single-antenna / single-radio frequency STA. In an actual scenario, the STA can also be multi-antenna / multi-radio frequency and can be a device with more than two antennas. The antenna / radio frequency is used to send / receive data packets. In one implementation, the antenna or radio frequency part of the STA can be separated from the main body part of the STA, and is in a structure with a remote layout. Figure 2b In, the STA can include a PHY processing circuit and a MAC processing circuit. The physical layer processing circuit can be used to process physical layer signals, and the MAC layer processing circuit can be used to process MAC layer signals.

[0127] The above briefly describes the system architecture of the embodiment of the present application. To better understand the technical solution of the embodiment of the present application, several contents related to the embodiment of the present application will be introduced below.

[0128] 1. Overlapping Basic Service Set (OBSS)

[0129] Overlapping Basic Service Set: A basic service set (BSS) operating on the same channel as the station's (STA's) BSS and within (either partly or wholly) its basic service area (BSA). The basic service area is the area containing the members of a basic service set (BSS). It might contain members of other BSSs.

[0130] In other words, the overlapping part of the basic service area of one BSS and that of another BSS is the OBSS. Understandably, the overlap here can be partial overlap between the basic service areas of one BSS and another BSS, or it can be an inclusion relationship, that is, the basic service area of one BSS falls within the basic service area of another BSS. As Figure 3a shown, Figure 3a is a schematic diagram of an OBSS formed by partial overlap of one BSS and another BSS. Figure 3a In it, AP1, STA1, and STA3 belong to BSS1, AP2 and STA2 belong to BSS2. There is an overlapping area between BSS1 and BSS2, and AP1 and AP2 are located within the overlapping area of BSS1 and BSS2, that is, within the OBSS formed by BSS1 and BSS2. As Figure 3b shown, Figure 3b is a schematic diagram of an OBSS formed by one BSS containing another BSS. Figure 3b In it, AP1, STA1, and STA3 belong to BSS1, AP2 and STA2 belong to BSS2. BSS1 contains BSS2, and AP1 and AP2 are located within the overlapping area of BSS1 and BSS2 (that is, Figure 3b the basic service area of BSS2 in it), that is, within the OBSS formed by BSS1 and BSS2.

[0131] Optionally, WLAN devices located within the same OBSS can receive information from two BSSs. For example,Figure 3a For example, when data is transmitted between AP1 and STA1 within the same BSS, AP2 in another BSS can receive the information sent by AP1 and STA1, or AP2 can also receive the information sent by STA3; AP2 can adaptively adjust the power of the PPDU sent by AP2 to STA2 according to the spatial reuse parameters transmitted by AP1 to achieve simultaneous transmission within the OBSS. Similarly, when data is transmitted between AP2 and STA2 within the same BSS, AP1 in another BSS can receive the information sent by AP2; AP1 can also adaptively adjust the power of the PPDU sent by AP1 to STA1 and / or STA3 according to the spatial reuse parameters transmitted by AP2 to achieve simultaneous transmission within the OBSS.

[0132] 2. Uplink Scheduling Transmission Method Based on Trigger Frame in 802.11ax Standard

[0133] See Figure 4 , Figure 4 is a schematic diagram of the uplink scheduling transmission method based on trigger frame in 802.11ax standard. As Figure 4 shown, the uplink scheduling transmission method based on trigger frame in 802.11ax standard specifically includes: (1) The AP sends a trigger frame, which is used to schedule one or more STAs to send uplink trigger-based HE PPDUs. The trigger-based HE PPDU can be abbreviated as HE TB PPDU. Among them, see Figure 5a , Figure 5a is a schematic diagram of the frame format of the trigger frame. As Figure 5a shown, the trigger frame includes a common information field and a user information list field. Among them, the common information field contains the common information that all STAs need to read, including the AP TX Power field and the UL Spatial Reuse field. The user information list field includes one or more user information fields, and one user information field contains the information that one STA needs to read. See Figure 5b , Figure 5b is a schematic diagram of the frame formats of the common information field and the user information field in the trigger frame of 802.11ax. As Figure 5bAs shown, in the user information field, the association identification 12 (AID12) represents the association identification of a certain STA, and the resource unit (RU) allocation sub-field is used to indicate the specific resource unit location allocated to this STA (the STA indicated by AID12).

[0134] (2) After receiving the trigger frame, one or more STAs parse out the user information field that matches their own AID from the trigger frame, and then send the HETB PPDU on the RU indicated by the resource unit allocation sub-field in the user information field.

[0135] (3) After receiving the HE TB PPDU, the AP sends an acknowledgment frame to one or more STAs to confirm that the AP has received the HE TB PPDU.

[0136] In one example, the meanings and functions of the various fields that may be included in the HE TB PPDU can be referred to Table 1 below.

[0137] Table 1

[0138]

[0139] 3. Trigger-based uplink scheduling transmission method and corresponding EHT TB PPDU in the 802.11be standard

[0140] 802.11be will follow the trigger-based uplink scheduling transmission method of 802.11ax, and the frame format and method flow of its trigger frame are similar to those of 802.11ax.

[0141] See Figure 6a , Figure 6a which is a schematic diagram of the frame format of the common information field and the user information field in the trigger frame of 802.11be. Figure 6a The trigger frame shown can be used to schedule EHT stations for uplink data transmission, such as scheduling EHT stations to send EHT TB PPDUs. It should be understood that Figure 6a this is only for illustration. The embodiments of the present application focus on the UL SRP field in the uplink spatial multiplexing field of the common information field. The other fields in this trigger frame can be Figure 6a different, that is, there are other forms of expression. The embodiments of the present application do not make any limitations in this regard. For example, the uplink HE-SIG A2 reserved field included in the common information field part can also be referred to as the UL U-SIG reserved field. See Figure 6b , Figure 6bIt is a schematic diagram of the frame structure of the EHT TB PPDU. As Figure 6b shown, the EHT TB PPDU includes a traditional short training sequence, a traditional long training sequence, a traditional signaling field, a repeated traditional signaling field, a common signaling field, an extremely high throughput short training sequence, an extremely high throughput long training sequence, a data field, and a data packet extension field. Among them, the meanings of the respective fields included in the EHT TB PPDU can be referred to Table 2 below.

[0142] Table 2

[0143]

[0144]

[0145] In one example, the content of the U-SIG field in the EHT TB PPDU is shown in Table 3:

[0146] Table 3 Meanings of the U-SIG Field in the EHT TB PPDU

[0147]

[0148] From the above Figure 6b and the U-SIG structure and content of the EHT TB PPDU in Table 3, it can be seen that due to the length limitation of the U-SIG in the EHT TB PPDU, the U-SIG contains at most 2 SRP fields, such as Spatial Reuse 1 and Spatial Reuse 2, and the length of each SRP field is 4 bits; while the common information field of the trigger frame carries 4 UL SRP fields, and the HE-SIG-A field of the HE TB PPDU also contains 4 SRP fields, which correspond one-to-one to the 4 UL SRP fields in the trigger frame. Therefore, in the scenario where the trigger frame schedules the EHT station to send the uplink EHT TB PPDU, the SRP field in the EHT TB PPDU cannot be set according to the setting method of the SRP field in the HE TB PPDU. Therefore, how to set the trigger frame to indicate the SRP field in the EHT TB PPDU, and how to set the SRP field in the EHT TB PPDU when the STA sends the EHT TB PPDU, so that the HE station and the EHT station can be scheduled under the same trigger frame and feedback the spatial reuse parameters, has become an urgent problem to be solved.

[0149] The embodiments of the present application provide a method for indicating spatial multiplexing parameters in a trigger frame and a method for determining the spatial multiplexing parameter field in a PPDU. For different bandwidths, without changing the frame structure of the EHT TB PPDU, by designing the trigger frame and setting the spatial multiplexing parameters in the EHT TB PPDU, HE stations and EHT stations can be scheduled under the same trigger frame and spatial multiplexing can be implemented in the EHT standard, enabling WLAN devices in an overlapping basic service set to transmit simultaneously and improving the transmission efficiency.

[0150] The technical solution provided by the present application will be described in detail with reference to more accompanying drawings.

[0151] The technical solution provided by the present application is elaborated through Embodiment 1 to Embodiment 5. Among them, Embodiment 1 elaborates on how to set the spatial multiplexing parameters in the EHT TB PPDU with different bandwidths (20 / 40 / 80 / 160 / 320 MHz) without changing 802.11ax. Embodiment 2 elaborates on how to indicate the spatial multiplexing parameters in the EHT TB PPDU by using the reserved field in the common information field of the trigger frame as the function of the uplink EHT spatial multiplexing field (the HE-SIG-A2 reserved field and the reserved field are collectively referred to as the reserved field). Embodiment 3 elaborates on how to indicate the spatial multiplexing parameters in the EHT TB PPDU by using the reserved field and the user information list field in the common information field of the trigger frame. Embodiment 4 elaborates on the spatial multiplexing method based on the spatial multiplexing parameters in 802.11be. It can be understood that the technical solutions described in Embodiment 1 to Embodiment 4 of the present application can be combined in any way to form a new embodiment.

[0152] It can be understood that the AP and STA in the present application can be either single-link devices or a functional entity or functional unit in a multi-link device. For example, the AP in the present application is a certain AP in the AP multi-link device, and the STA is a certain STA in the station multi-link device. The present application does not make any limitations in this regard.

[0153] It is understandable that the method provided in this application will be described below by taking a communication system composed of one or more APs and one or more STAs as an example. Among them, the AP supports the 802.11be protocol (or Wi-Fi 7, EHT protocol), and can also support other WLAN communication protocols, such as 802.11ax, 802.11ac and other protocols. At least one of the one or more STAs supports the 802.11be protocol, that is, there is at least one EHT station. It should be understood that the APs and STAs in this application can also support the next-generation protocol of 802.11be. That is to say, the method provided in this application is applicable not only to the 802.11be protocol, but also to the next-generation protocol of 802.11be.

[0154] Embodiment 1

[0155] Embodiment 1 of this application mainly introduces the setting of the spatial multiplexing parameters in the EHT TB PPDU with a bandwidth of 20 / 40 / 80 / 160 / 320 MHz without changing the trigger frame (or without changing the content of the trigger frame).

[0156] In this Embodiment 1, the trigger frame is as Figure 5b shown, where

[0157] See Figure 7a , Figure 7a is the first schematic flowchart of the method for determining the spatial multiplexing parameters indicated in the trigger frame and the corresponding spatial multiplexing parameter fields in the PPDU provided by the embodiment of this application. As Figure 7a shown, the method includes but is not limited to the following steps:

[0158] S101, the AP sends a trigger frame, which is used to trigger the station to send a triggered extremely high throughput physical layer protocol data unit EHT TB PPDU.

[0159] S102, the STA receives the trigger frame.

[0160] S103, the STA sends an EHT TB PPDU. In the common signaling field U-SIG of the EHT TB PPDU, there is only one spatial multiplexing parameter SRP field, and this SRP field indicates the spatial multiplexing parameters of the entire bandwidth. The value indicated by this SRP field is determined based on the value indicated by one or more uplink spatial multiplexing parameter UL SRP fields in the common information field of the trigger frame.

[0161] In one implementation, as Figure 7bAs shown, the value indicated by the SRP1 field is equal to the minimum value of the four spatial multiplexing fields indicated by the four uplink spatial multiplexing parameter ULSRP fields, which can be expressed as SRP = min{UL SRP1, UL SRP2, ULSRP3, UL SRP4}.

[0162] In another implementation, the value indicated by the SRP1 field is equal to any value of the four spatial multiplexing fields indicated by the four uplink spatial multiplexing parameter ULSRP fields, which can be expressed as SRP1 is equal to UL SRP1 or UL SRP2 or UL SRP3 or ULSRP4}.

[0163] S104, the AP receives the EHT TB PPDU sent by the station.

[0164] See Figure 8a , Figure 8a is the second schematic flowchart of the method for determining the spatial multiplexing parameter indicated in the trigger frame and the corresponding spatial multiplexing parameter field in the PPDU provided by the embodiment of the present application. As Figure 8a shown, the method includes but is not limited to the following steps:

[0165] S201, the AP sends a trigger frame, which is used to trigger the station to send a triggered extremely high throughput physical layer protocol data unit EHT TB PPDU. The structure and composition of the trigger frame are shown in Figure 6a .

[0166] S202, the STA receives the trigger frame.

[0167] S203, the STA sends an EHT TB PPDU, and the common signaling field U-SIG of the EHT TB PPDU includes two spatial multiplexing parameter SRP1 fields and SRP2 fields, which are respectively used to indicate the spatial multiplexing parameters corresponding to the lower half of the frequency in the entire bandwidth and the spatial multiplexing parameters corresponding to the upper half of the frequency. The values indicated by the spatial multiplexing parameter SRP1 field and SRP2 field are respectively determined based on the values indicated by one or more uplink spatial multiplexing parameter ULSRP fields in the common information field of the trigger frame.

[0168] In one implementation, the SRP1 field and the SRP2 field are respectively used to indicate the SRP values on different subchannels, and the SRP value is equal to the sum of the transmit power of the AP on the corresponding subchannel and the maximum interference power that the AP can accept. It should be understood that the SRP1 field and the SRP2 field in the U-SIG of the EHT TBPPDU may also have other names, such as the PSR1 field and the PSR2 field, and the embodiments of the present application do not limit this.

[0169] In one implementation, as Figure 8bAs shown, when the bandwidth of the EHT TB PPDU is 20 / 40 / 80 / 160 MHz and it is a non-aggregated PPDU, the value of the SRP1 field in the U-SIG is equal to the minimum of the UL SR1 field and the UL SR2 field among the 4 spatial multiplexing fields indicated in the uplink spatial multiplexing field of the trigger frame, which can be expressed as SRP1 = min{UL SRP1, UL SRP2}.

[0170] The value of the SRP2 field in the U-SIG can be equal to the minimum of the UL SR3 field and the UL SR4 field among the 4 spatial multiplexing fields indicated in the uplink spatial multiplexing field of the trigger frame, which can be expressed as SRP2 = min{SRP3, UL SRP4}.

[0171] In one implementation, as Figure 8b shown, when the EHT bandwidth is 320 MHz or the TB PPDU is an aggregated PPDU, the value of the SRP1 field in the U-SIG is equal to the value of the SRP2 field, and both are equal to the minimum of the 4 spatial multiplexing fields indicated in the uplink spatial multiplexing field of the trigger frame, SRP1 = SRP2 = min{UL SRP1, UL SRP2, UL SRP3, UL SRP4}.

[0172] S204, the AP receives the EHT TB PPDU sent by the station.

[0173] Optionally, the trigger frame involved in the method flow of indicating the spatial multiplexing parameters in the trigger frames shown in 7a and 8a above can be used not only to trigger the EHT station to send the EHT TB PPDU, but also to trigger the HE station to send the HE TB PPDU. Or, the above trigger frame is only used to trigger the EHT station to send the EHT TB PPDU; or only used to trigger the HE station to send the HE TB PPDU. The embodiments of the present application focus on the case where the trigger frame is used to trigger the EHT station to send the EHT TB PPDU, but are not limited to the case where the trigger frame is only used to trigger the EHT station to send the EHT TB PPDU, and can also be the case of simultaneously triggering the EHT station to send the EHT TB PPDU and the HE station / EHT station to send the HE TB PPDU. It can be understood that the HE station can only send the HE TB PPDU, and the EHT station is compatible with the 802.11ax protocol, so the EHT station can send both the HE TB PPDU and the EHT TB PPDU.

[0174] Specifically, refer to Figure 9 , Figure 9 which is a timing diagram of the trigger frame provided by the embodiments of the present application for simultaneously scheduling the HE station and the EHT station for uplink data transmission. As Figure 9As shown, the AP sends a trigger frame, which is used to schedule the uplink data transmission of both HE stations (such as STA1 in Figure 9 ) and EHT stations (such as STA2 in Figure 9 ). After receiving the trigger frame, STA1 and STA2 wait for a period of time (e.g., Short Inter-Frame Space), then STA1 sends an HE TB PPDU and STA2 sends an EHT TB PPDU. After receiving the uplink multi-user PPDU, the AP waits for a period of time (e.g., Short Inter-Frame Space) and then replies with a Multiple STA Block Acknowledge (M-BA) frame to confirm that the AP has received the PPDU sent by one or more stations. It can be understood that Figure 9 the trigger frame shown can also be used only to schedule EHT stations, that is, both STA1 and STA2 in Figure 9 are EHT stations. It should also be understood that Figure 9 the trigger frame shown can also be used only to schedule stations to send EHT TB PPDUs, that is, both STA1 and STA2 in Figure 9 send EHT TB PPDUs.

[0175] Specifically, the above trigger frame can be sent in broadcast form. After the AP sends the trigger frame, one or more stations can receive the trigger frame. If the trigger frame is used to schedule both EHT stations to send EHT TB PPDUs and HE stations to send HE TB PPDUs at the same time, then the EHT stations can set the values indicated by the SRP1 field and the SRP2 field in the U-SIG of the EHT TB PPDU based on the values indicated by one or more ULSRP fields in the common information field of the received trigger frame, and send the EHT TB PPDU. In other words, the EHT stations can also set the values of the SRP1 field and the SRP2 field in the U-SIG of the EHT TB PPDU based on the values of one or more UL SRP fields in the common information field of the received trigger frame. The HE stations can copy the values of the 4 UL SRP fields in the received trigger frame one by one to the 4 SRP fields of the HE TB PPDU and send the HT TB PPDU.

[0176] Optionally, the correspondence between the values and meanings of the UL SRP fields or SRP fields involved in this application can be as shown in Table 4 below. Among them, the Uplink Space Reuse Parameter (UL SRP) field can also be called the Uplink Parameter Space Reuse (UL PSR) field. In this application, UL SRP and UL PSR can be used interchangeably, that is, SRP and PSR can be used interchangeably. It can be understood that the value of the uplink space reuse parameter is determined by the AP and is equal to the sum of the transmit power of the AP and the maximum interference power that the AP can accept.

[0177] Table 4

[0178]

[0179]

[0180] It can be understood that in this application, the value indicated by the UL SRP field can be any value in the second column of Table 4 above, and the value of the UL SRP field can be any value in the first column of Table 4 above.

[0181] Embodiment 2

[0182] Embodiment 2 of this application mainly introduces how to set the trigger frame (i.e., change the content of the trigger frame) to adapt to the SRP field of U-SIG, and how to set the spatial multiplexing parameters in the triggered PPDU (HE TB PPDU and EHT TB PPDU) after the content of the trigger frame is changed.

[0183] It can be understood that in practical applications, Embodiment 2 of this application can be implemented in combination with some implementation methods in the foregoing Embodiment 1, or can be implemented independently. This application does not limit this.

[0184] In this Embodiment 2, the HE-SIG-A2 reserved field of the trigger frame as shown in Figure 5b or 6a, or further using the reserved field, is used to indicate the spatial multiplexing parameters of the EHT TB PPDU.

[0185] Specifically, as shown in Figure 10 , the reserved field in the common information field of the trigger frame (this reserved field includes the HE-SIG-A2 reserved field and the reserved field) is used to set the uplink EHT PPDU bandwidth subfield, which is used to indicate whether the EHT STA sends the HE / EHT subfield of the HETB PPDU or the EHT TB PPDU, and the uplink EHT spatial multiplexing field. Optionally, it may further include a special user presence indication subfield. This uplink EHT spatial multiplexing field individually indicates the spatial multiplexing parameters in the EHT TB PPDU, or cooperates with the uplink spatial multiplexing field to indicate the spatial multiplexing parameters in the EHT TB PPDU. In other words, the value of the SRP field in the U-SIG of the EHTTB PPDU depends on at least one of this uplink EHT spatial multiplexing field and the uplink spatial multiplexing field.

[0186] As shown in Figure 10 , the content of the HE-SIG-A2 reserved field and the reserved field of the trigger frame is shown in Table 5:

[0187] Table 5 Uplink HE-SIG-A2 Reserve and / or Reserve Field

[0188]

[0189] It should be understood that each sub - field included in the above - mentioned uplink HE - SIG - A2 reservation and / or reservation field may include a part or all. It should also be understood that the names of the sub - fields in Table 5 may also be taken as other names, and those exemplified in this application are not restrictive. The number of bits occupied by each sub - field is for illustration, and the embodiments of this application do not limit this.

[0190] Among them, the meaning of the uplink EHT PPDU bandwidth field in Table 5 when indicating the bandwidth of the uplink EHT PPDU alone is shown in Table 6:

[0191] Table 6: Uplink EHT PPDU bandwidth field indicating the uplink EHT PPDU bandwidth alone

[0192] Uplink EHT PPDU Bandwidth Field Meaning 000 20 MHz 001 40 MHz 010 80 MHz 011 160 MHz 100 320 MHz 101 Reserved 110 Reserved 111 Reserved

[0193] It should be understood that the correspondence between the values of the above - mentioned uplink EHT PPDU bandwidth field and its meaning is for illustration, and there may be other corresponding methods in the embodiments of this application. For example, 100 may indicate 320MHz - 1; 101 may indicate 320MHz - 2; 320MHz - 1 and 320MHz - 2 respectively represent the channel division of two 320MHz channels: 320MHz - 1 with a channel center frequency of 31 / 95 / 159 and 320MHz - 2 with a center frequency of 63 / 127 / 191.

[0194] It should be noted that two types of reservation indications are introduced in the current standard. One is called Validate (verification) reservation bits / entries. When the receiving end does not understand the indication of this field, it will discard the frame. The other is called Disregard (discard) reservation bits / entries. When the receiving end does not understand the indication of this field, it will ignore this field and continue to interpret other fields. For the uplink EHT PPDU bandwidth field, this reservation entry needs to be a verification reservation entry, that is, when a non - EHT receiving end does not understand the indication of this field, it will discard the frame.

[0195] Next, in combination with the trigger frame as Figure 10 shown, the method for determining the spatial multiplexing parameters indicated in the trigger frame and the spatial multiplexing parameter fields in the corresponding PPDU is described.

[0196] See Figure 11 , Figure 11 is the third schematic flowchart of the method for determining the spatial multiplexing parameters indicated in the trigger frame provided by the embodiments of this application and the spatial multiplexing parameter fields in the corresponding PPDU. As Figure 11As shown, the method for determining the spatial multiplexing parameter in the trigger frame and the corresponding spatial multiplexing parameter field in the PPDU includes but is not limited to the following steps:

[0197] S301, The AP sends a trigger frame, which is used to trigger the station to send an EHT TB PPDU. The uplink spatial multiplexing field in the common information field of the trigger frame includes 4 UL SRP fields; in addition, the UL HE-SIG-A2 reserved field and / or the reserved field of the trigger frame are utilized as an indication of the EHT spatial multiplexing parameter. In one implementation, as Figure 10 shown, the UL HE-SIG-A2 reserved field and / or the reserved field include: the uplink EHT PPDU bandwidth subfield, the HE / EHT subfield, the uplink EHT spatial multiplexing field, and the special user presence indication field.

[0198] S302, The STA receives the trigger frame.

[0199] S303, The STA sends an EHT TB PPDU, and one SRP field or two SRP fields may be included in the U-SIG of the EHT TB PPDU.

[0200] In one implementation manner, as Figure 12a shown, there is only one SRP field in the U-SIG, indicating the spatial multiplexing parameter of the entire bandwidth. At this time, the value of the SRP field is equal to the value of the uplink EHT spatial multiplexing field.

[0201] In another implementation manner, as Figure 12b shown, there are two SRP fields in the U-SIG, denoted as U-SIG SRP1 and U-SIG SRP2, respectively indicating the spatial multiplexing parameters of the lower frequency half and the higher frequency half of the entire bandwidth. The value of the SRP1 field is indicated by the uplink spatial multiplexing field in the trigger frame. In one example, the U-SIG SRP1 field may be equal to the minimum value or any value of the 4 spatial multiplexing fields indicated in the spatial multiplexing field; the value of the U-SIG SRP2 field is indicated by the uplink EHT spatial multiplexing field in the trigger frame.

[0202] In yet another implementation manner, as Figure 12c shown, there are two SRP fields in the U-SIG, denoted as U-SIG SRP1 and U-SIG SRP2. There are two SRP fields in the U-SIG.

[0203] When the bandwidth is 20 / 40 / 80 / 160 MHz and the TB PPDU is a non-aggregated PPDU, only two SRP fields are indicated by the uplink spatial multiplexing field; among them, the value of the U-SIG SRP1 field can be equal to the minimum value or any value of the UL SRP1 field and the UL SR2 field in the 4 spatial multiplexing fields indicated in the spatial multiplexing field; the value of the U-SIG SRP2 field can be equal to the minimum value or any value of the UL SR3 field and the UL SR4 field in the 4 spatial multiplexing fields indicated in the spatial multiplexing field. At this time, the uplink EHT spatial multiplexing field is reserved or does not exist.

[0204] When the bandwidth is 320 MHz or the TB PPDU is an aggregated PPDU, the SRP1 field in the two SRPs is further indicated by the uplink spatial multiplexing field, where the value of the U-SIG SRP1 field can be equal to the minimum value of the 4 spatial multiplexing fields indicated in the spatial multiplexing field; the value of the U-SIG SRP2 field is equal to the value indicated by the uplink EHT spatial multiplexing field.

[0205] S304, the AP receives the EHT TB PPDU sent by the station.

[0206] In one implementation, the above trigger frame can not only be used to trigger the EHT station to send an EHT TB PPDU, but also be used to trigger the HE station to send an HE TB PPDU. Alternatively, the above trigger frame is only used to trigger the EHT station to send an EHT TB PPDU; or only used to trigger the HE station to send an HE TB PPDU. The embodiments of the present application focus on the case where the trigger frame is used to trigger the EHT station to send an EHT TB PPDU, but are not limited to the case where the trigger frame is only used to trigger the EHT station to send an EHT TB PPDU, and can also be the case of simultaneously triggering the EHT station to send an EHT TB PPDU and the HE station / EHT station to send an HE TB PPDU.

[0207] In one implementation, only 1 spatial multiplexing parameter (SRP) field, such as the SRP1 field, is included in the U-SIG of the EHT TB PPDU; or 2 spatial multiplexing parameter (SRP) fields, namely the SRP1 field and the SRP2 field, can be included. The SRP1 field and the SRP2 field are respectively used to indicate the SRP values on different subchannels, and the SRP value is equal to the sum of the transmission power of the AP on the corresponding subchannel and the maximum interference power that the AP can accept. It should be understood that the SRP1 field and the SRP2 field in the U-SIG of the EHT TB PPDU can also have other names, such as the PSR1 field and the PSR2 field, and the embodiments of the present application do not limit this.

[0208] The uplink spatial multiplexing field in the common information field of the above-mentioned trigger frame still includes 4 UL SRP fields, namely UL SRP1 field, UL SRP2 field, UL SRP3 field, and UL SRP4 field. The uplink EHT spatial multiplexing field in the common information field of the trigger frame is denoted as UL EHT SRP. The spatial multiplexing fields in U-SIG of the EHT TB PPDU are denoted as SRP1 and SRP2.

[0209] It can be understood that in practical applications, if the second embodiment of this application is implemented in combination with the foregoing first embodiment, then in the 20 / 40 / 80 / 160 / 320 MHz bandwidth, the settings of the UL SRP1 field to UL SRP4 fields in the trigger frame, and the settings of the SRP1 field and SRP2 field in the U-SIG of the EHT TB PPDU can be summarized as shown in Table 7 below. Among them, " / " in Table 7 represents the "or" relationship.

[0210] Table 7

[0211]

[0212]

[0213] It should be understood that for the aggregated PPDU scenario, the bandwidths of the HE TB PPDU and the EHT TB PPDU are 160 MHz respectively, or the bandwidth of the HE TB PPDU is 80 MHz and the bandwidth of the EHT TB PPDU is 160 MHz, or 80 MHz of the 320 MHz is punched out.

[0214] It should also be understood that in the aggregated PPDU scenario, the setting of the spatial multiplexing parameters in the HE-SIG-A of the HE TB PPDU follows the prior art and will not be elaborated here.

[0215] It can be seen that in the embodiment of this application, by using the UL SRP value in the uplink spatial multiplexing field in the trigger frame or further using the HE-SIG-A2 reserved field and / or the reserved field in the trigger frame as the UL EHT spatial multiplexing field to indicate the SRP field for setting the U-SIG of the EHT TB PPDU, and by setting the spatial multiplexing field in the U-SIG, the trigger frame can schedule the EHT station to send the uplink EHT TB PPDU, and can also enable the HE station and the EHT station to be scheduled under the same trigger frame.

[0216] Embodiment Three

[0217] Embodiment 3 of this application mainly introduces a technical solution for using a special user information field carried in a trigger frame to indicate separate spatial multiplexing parameters and U-SIG reservation fields for an EHT TB PPDU, and how to set the spatial multiplexing parameters and U-SIG reservation fields of the EHT TB PPDU when the trigger frame does not carry this special user information field.

[0218] It can be understood that in practical applications, Embodiment 3 of this application can be implemented in combination with the setting methods of the SRP1 field and the SRP2 field in the U-SIG under 20MHz, 40MHz, 80MHz, and 160MHz bandwidths in Embodiment 1 or Embodiment 2 described above; Embodiment 3 of this application can also be implemented independently, and this application does not make any limitations in this regard.

[0219] See Figure 13 , Figure 13 In the schematic trigger frame shown, the common information field of the trigger frame may include 4 UL SRP fields, namely the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field. These 4 UL SRP fields can be used to indicate the values of the 4 SRP fields in the HE TB PPDU respectively.

[0220] The user information list field of the trigger frame includes multiple user information fields, and one of the user information fields is a special user information field, denoted as user info(STA1).

[0221] In one implementation, the special user information field may include a UL SRP field and a U-SIG reservation indication field. The UL SRP field is used to indicate the values of the SRP1 field and the SRP2 field in the U-SIG of the EHT TB PPDU, or the UL SRP field of the special user information field is used to indicate the value of the SRP2 field in the U-SIG of the EHT TB PPDU. The U-SIG reservation indication field is used to indicate the value of the U-SIG reservation field in the U-SIG of the EHT TB PPDU.

[0222] In another implementation, the special user information field does not include a UL SRP field but may include a U-SIG reservation indication field. The values of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU are both indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field in the common information field of the trigger frame, or by the UL EHT SRP field of the HE-SIG-A2 in the common information field. The U-SIG reservation indication field is used to indicate the value of the U-SIG reservation field in the U-SIG of the EHT TB PPDU.

[0223] In one implementation, the value of the association identifier (AID) 12 field of the special user information field is a preset value, which can be any one of 2008 to 2044, or 2046 to 4095. For example, the preset value is 2044. The preset value can also be an AID (such as 2007) within 1 - 2007 that has not been assigned to any associated STA.

[0224] In another implementation, the special user information field does not need to carry the complete value of the AID 12. Only by setting the highest bit to 1 and fixing any one of the subsequent 11 bits to 0, it can be distinguished from any existing used value of the AID 12. The other 10 bits can be used to transmit information.

[0225] The 802.11ax standard has a trigger frame carrying a 9 - bit UL HE - SIG - A2 reserved field, but until the 802.11ax standard was finalized, the HE - SIG - A2 reserved bits were not re - defined, resulting in a waste of 9 bits. For the 802.11be standard, as Figure 9 shown, the U - SIG part of the EHT TB PPDU, in addition to SRP1 and SRP4, also includes a U - SIG reserved field, that is, 12 bits are reserved. The value of these 12 reserved bits needs to be indicated by the trigger frame, which is why the trigger frame needs to use the special user information field to carry the uplink U - SIG field reservation indication. If the bits corresponding to the U - SIG reserved field in the U - SIG of the EHT TB PPDU adopt default values, there is no need to indicate them in the trigger frame. Instead, the specific value is indicated by the uplink U - SIG reservation indication field of the special user information field in the trigger frame when needed, which will save the bit overhead of the trigger frame. If later versions after 802.11be also have no need, then 802.11be does not need to carry the special user information field in the trigger frame.

[0226] It should be understood that the above - mentioned special user information field may not exist in release 1 (R1) of 802.11be; however, devices supporting R1 need to be able to understand the special user information field. If the special user information field exists, the default value cannot be used, but the value indicated in the special user field needs to be adopted. This is to prevent interference when R1 devices and R2 devices jointly transmit U - SIG, resulting in different contents and causing the AP or third - party stations to be unable to receive correctly.

[0227] In summary, whether the special user information field exists and its meaning are shown in Table 8:

[0228] Meanings of Special User Information Fields in Table 8

[0229]

[0230] It should be noted that if there is only one SRP field in the U-SIG, the reserved field is 16 bits. If there are two SRP fields in the U-SIG, the reserved field is 12 bits.

[0231] Among them, the value of the U-SIG reserved field of the EHT TB PPDU comes partly from the indication of the special user field in the trigger frame and partly from the indication of the uplink HE-SIG-A2 reservation and / or reserved field. If the subsequent standard needs to modify the meanings of some reserved fields, the reserved values corresponding to the HE-SIG-A2 reservation and / or reserved field can be modified preferentially. In this way, there is no need to carry the special user field, saving the bit overhead of the trigger frame.

[0232] It should be understood that the special user information fields shown in Table 8, including the uplink common signaling field reservation indication field and the physical layer version field, may exist partially or completely. It should also be understood that the names of the respective sub-fields in Table 8 may also be taken as other names, and the examples shown in this application are not restrictive. The number of bits occupied by each sub-field is only for example, and the embodiments of this application may also set other numbers of bits for them.

[0233] See Figure 14 , Figure 14 is a schematic flowchart of a trigger frame transmission method and a corresponding PPDU transmission method provided by an embodiment of this application. As Figure 14 shown, the trigger frame transmission method and the corresponding PPDU transmission method include but are not limited to the following steps:

[0234] S401. The AP sends a trigger frame, which is used to trigger the station to send an EHT TB PPDU. The trigger frame also carries second indication information, and the second indication information is used to indicate the value of the U-SIG reserved field in the U-SIG of the EHT TB PPDU.

[0235] The trigger frame also carries first indication information, and the first indication information is used to indicate the value of the SRP1 field and / or SRP2 field in the U-SIG of the EHT TB PPDU;

[0236] S402. The STA receives the trigger frame.

[0237] In S403, the STA sends an EHT TB PPDU, where the value of the U-SIG reserved field in the U-SIG of the EHT TB PPDU is the default value or is determined based on the second indication information. The values of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU are determined based on the first indication information.

[0238] In S404, the AP receives the EHT TB PPDU sent by the station.

[0239] Optionally, the above trigger frame can be used not only to trigger an EHT station to send an EHT TB PPDU, but also to trigger an HE station to send an HE TB PPDU. Alternatively, the above trigger frame is only used to trigger an EHT station to send an EHT TB PPDU; or only used to trigger an HE station to send an HE TB PPDU. The embodiments of the present application focus on the case where the trigger frame is used to trigger an EHT station to send an EHT TB PPDU, but are not limited to the case where the trigger frame is only used to trigger an EHT station to send an EHT TB PPDU, and can also be the case of simultaneously triggering an EHT station to send an EHT TB PPDU and an HE station / EHT station to send an HE TB PPDU.

[0240] Optionally, the U-SIG of the EHT TB PPDU only includes two spatial reuse parameter (SRP) fields, namely the SRP1 field and the SRP2 field. The SRP1 field and the SRP2 field are respectively used to indicate the SRP values on different sub-channels, and the SRP value is equal to the sum of the transmission power of the AP on the corresponding sub-channel and the maximum interference power that the AP can accept. It should be understood that the SRP1 field and the SRP2 field in the U-SIG of the EHT TB PPDU may also have other names, such as the PSR1 field and the PSR2 field, and the embodiments of the present application do not limit this.

[0241] Among them, the above trigger frame may carry first indication information, which can be used to indicate the values of the SRP1 field and the SRP2 field in the U-SIG of the EHT TB PPDU, or the first indication information is used to indicate the value of the SRP2 field in the U-SIG of the EHT TB PPDU.

[0242] In one implementation, the first indication information may be located in the uplink spatial multiplexing field of the common information field of the trigger frame. When the STA sends an EHT TB PPDU, the setting method of the value of the SRP field in the U-SIG thereof is described in detail in Embodiment 1 and will not be elaborated here. In this implementation, the trigger frame does not include the second indication information. Therefore, the U-SIG reserved field in the U-SIG part of the EHT TB PPDU is set to the default value. Or the trigger frame includes the second indication information, which is located in the special user information field. Therefore, the U-SIG reserved field in the U-SIG part of the EHT TB PPDU is set to the value indicated by the second indication information.

[0243] In another implementation, a part of the first indication information is located in the uplink spatial multiplexing field of the common information field of the trigger frame, and a part is located in the uplink EHT spatial multiplexing field of the common information field of the trigger frame; or the first indication information is entirely located in the uplink EHT spatial multiplexing field of the common information field of the trigger frame. When the STA sends an EHT TB PPDU, the setting method of the value of the SRP field in the U-SIG thereof is described in detail in Embodiment 2 and will not be elaborated here. In this implementation, the trigger frame does not include the second indication information. Therefore, the U-SIG reserved field in the U-SIG part of the EHT TB PPDU is set to the default value. Or the trigger frame includes the second indication information, which is located in the special user information field. Therefore, the U-SIG reserved field in the U-SIG part of the EHT TB PPDU is set to the value indicated by the second indication information.

[0244] In yet another implementation, both the first indication information and the second indication information may be located in the user information field of the trigger frame, and the user information field is a special user information field.

[0245] For the special user information field mentioned above, in one implementation, it is not necessary to carry the complete value of AID12. Only by setting the highest bit to 1 and fixing any 1 bit among the subsequent 11 bits to 0, it can be distinguished from any existing used value of AID12. The other 10 bits can be used to transmit information. In another implementation, the value of the association identifier (AID) 12 field of the special user information field is a preset value, which can be 2007, or any one of 2008 to 2044, or 2046 to 4095. For example, the preset value is 2044. At the same time, the second indication information is also located in the special user information field.

[0246] For the EHT station, set the AID12 field in a certain user information field in the trigger frame to a special value (such as AID12 = 2044 or 2207), or the AID is not allocated, or the AID12 field is set to a value that is not a complete AID12, so that the EHT station can recognize that this user information field is for setting the SRP field and the reserved field in the U-SIG. That is to say, the above first indication information is carried in this special user information field, which is used to indicate the value of the SRP1 field and / or the SRP2 field in the U-SIG, and the above second indication information is also carried in this special user information field, which is used to indicate the value of the reserved field in the U-SIG. It should be understood that the HE station does not parse the user information field in the trigger frame whose AID12 field is a special value, or when the HE station receives a user information field whose AID12 field is a special value, it means that it has nothing to do with the HE station. That is to say, the newly added first indication information in this trigger frame does not affect the behavior of the HE station.

[0247] When the first indication information is used to indicate the values of the SRP1 field and the SRP2 field in the U-SIG, use 8 bits after the AID12 field of this user information field to carry this first indication information, where the first 4 bits of these 8 bits indicate the value of the SRP1 field in the U-SIG, and the last 4 bits of these 8 bits are used to indicate the value of the SRP2 field. It should be understood that these 8 bits can be represented by a first field and a second field. The first field is the first 4 bits of these 8 bits, and the second field is the last 4 bits of these 8 bits. That is to say, the first field after the AID12 field is used to indicate the value of the SRP1 field in the U-SIG, and the second field after the AID12 field is used to indicate the value of the SRP2 field in the U-SIG. It should also be understood that the first field can be called the UL SRP1 field for the U-SIG, the second field can be called the UL SRP2 field for the U-SIG, and the first field and the second field can also have other names, which are not limited in the embodiments of this application.

[0248] After the EHT station receives the trigger frame, set the value of the SRP1 field in the U-SIG of the upcoming transmitted EHT TB PPDU to the value of the first field in the user information field of this trigger frame, and set the value of the SRP2 field in the U-SIG to the value of the second field in the user information field of this trigger frame. Among them, the first field and the second field in the user information field of this trigger frame respectively correspond to a 160 MHz bandwidth. For example, the first field corresponds to the first 160 MHz bandwidth from low to high in frequency, and the second field corresponds to the second 160 MHz bandwidth from low to high in frequency. In other words, the SRP1 field in the U-SIG corresponds to the first 160 MHz bandwidth from low to high in frequency, and the SRP2 field in the U-SIG corresponds to the second 160 MHz bandwidth from low to high in frequency.

[0249] See Figure 15a , Figure 15a is a schematic diagram of the SRP indication of U-SIG in the trigger frame provided by the embodiment of the present application. As Figure 15a shown, the user information field of the trigger frame includes the AID12 field, the UL SRP1 field for U-SIG, the UL SRP2 field for U-SIG, the UL U-SIG reservation indication field, etc. The value of the AID12 field is a special value. The UL SRP1 field for U-SIG and the UL SRP2 field for U-SIG are located after the AID12 field, and can be adjacent to the AID12 field or not adjacent to the AID12 field. The UL SRP1 field for U-SIG indicates the value of the SRP1 field in U-SIG, and the UL SRP2 field for U-SIG indicates the value of the SRP2 field in U-SIG. Among them, the value indicated by the UL SRP1 field for U-SIG is equal to the sum of the transmission power of the AP on the primary 160 MHz channel and the maximum interference power that the AP can accept, and the value indicated by the UL SRP2 field for U-SIG is equal to the sum of the transmission power of the AP on the secondary 160 MHz channel and the maximum interference power that the AP can accept. The UL U-SIG reservation indication field is used to indicate the value of the U-SIG reservation field in U-SIG when the STA sends an EHT TB PPDU.

[0250] When the first indication information is only used to indicate the value of the SRP2 field in the U-SIG, four bits after the AID12 field of the user information field are used to carry the first indication information, that is, these four bits are used to indicate the value of the SRP2 field in the U-SIG. These four bits can be referred to as the UL SRP2 field for the U-SIG, and these four bits can also have other names, which are not limited in the embodiments of the present application. Optionally, when the first indication information is only used to indicate the value of the SRP2 field in the U-SIG, four reserved bits in the common information field of the trigger frame, such as the four reserved bits in the HE-SIG-A2 reserved field or the reserved field, can be used to carry the first indication information, that is, these four reserved bits are used to indicate the value of the SRP2 field in the U-SIG. The above-mentioned common information field of the trigger frame includes four UL SRP fields. After receiving the trigger frame, the EHT station sets the value of the SRP1 field in the U-SIG of the upcoming EHT TB PPDU to the minimum value of the values of the four UL SRP fields included in the common information field of the trigger frame, that is, SRP1 = min(UL SRP1, UL SRP2, UL SRP3, UL SRP4); and sets the value of the SRP2 field in the U-SIG to the value of the UL SRP2 field for the U-SIG in the special user information field of the trigger frame. Among them, the SRP1 field in the U-SIG corresponds to the first 160 MHz bandwidth from low to high in frequency, and the SRP2 field in the U-SIG corresponds to the second 160 MHz bandwidth from low to high in frequency. The EHT station also sets the value of the U-SIG reserved field in the U-SIG of the sent EHT TB PPDU to the value of the UL U-SIG reserved indication field in the special user information field of the trigger frame.

[0251] See Figure 15b , Figure 15b is another schematic diagram for SRP indication of U-SIG in the trigger frame provided by the embodiments of the present application. As Figure 15bAs shown, in one implementation, the common information field of the trigger frame includes four UL SRP fields, which are respectively used to indicate the SRP values of four 40 MHz sub-channels with frequencies from low to high on the primary 160 MHz channel; or in another implementation, the HE-SIG-A2 reserved field and / or the reserved field in the common information field of the trigger frame are used as the UL EHT SRP field to indicate the SRP value of the primary 160 MHz channel. The special user information field of the trigger frame includes the AID12 field, the UL SRP2 field for U-SIG, etc. The value of the AID12 field is a special value or an incomplete AID12 value. The UL SRP2 field for U-SIG is located after the AID12 field, and can be adjacent to the AID12 field or not adjacent to the AID12 field. The UL SRP2 field for U-SIG indicates the value of the SRP2 field in U-SIG. Among them, the value indicated by the UL SRP2 field for U-SIG is equal to the sum of the transmission power of the AP on the secondary 160 MHz channel and the maximum interference power that the AP can accept, or equal to the SRP value on the secondary 160 MHz channel.

[0252] After receiving the trigger frame, the EHT station sets the value of the SRP1 field in the U-SIG of the upcoming transmitted EHT TB PPDU to the minimum value among the values of the four UL SRP fields included in the common information field of the trigger frame, that is, SRP1 = min(ULSRP1, UL SRP2, UL SRP3, UL SRP4); and sets the value of the SRP2 field in the U-SIG to the value of the UL SRP2 field for U-SIG in the special user information field of the trigger frame. Among them, the SRP1 field in the U-SIG corresponds to the first 160 MHz bandwidth with frequencies from low to high, and the SRP2 field in the U-SIG corresponds to the second 160 MHz bandwidth with frequencies from low to high. The EHT station also sets the value of the U-SIG reserved field in the U-SIG of the transmitted EHT TB PPDU to the value of the UL U-SIG reserved indication field in the special user information field of the trigger frame.

[0253] It should be understood that the embodiments of the present application mainly focus on the setting methods of the SRP1 field and the SRP2 field in the U-SIG, and the U-SIG reserved field in the U-SIG under a 320 MHz bandwidth. In a 160 MHz bandwidth and below, the setting methods of the SRP1 field and the SRP2 field in the U-SIG can refer to the relevant descriptions in the foregoing Embodiment 1 or the foregoing Embodiment 2, and will not be elaborated here.

[0254] It can be seen that in the case of a 320 MHz bandwidth, the embodiments of the present application utilize a certain special user information field in the trigger frame to indicate separate spatial multiplexing parameters and U-SIG reservation fields for the EHT TB PPDU. Its meaning is clear and it does not affect the scheduling of HE stations. HE stations and EHT stations can be scheduled under the same trigger frame. When the above-mentioned special user information field does not exist in the trigger frame, the spatial multiplexing parameters of the U-SIG of the EHT TB PPDU can be set according to the indication of the uplink spatial multiplexing field and / or the uplink EHT spatial multiplexing field in the trigger frame, and the U-SIG reservation field can be set to the default value.

[0255] In summary, in Embodiments 1 to 3 of the present application, the relationship between the U-SIG and the trigger frame in the EHT TB PPDU can be summarized as shown in Table 9:

[0256] Table 9

[0257]

[0258]

[0259] It should be understood that the various sub-fields included in the U-SIG in Table 9 are only examples and may also include some of them. It should also be understood that the names of the various sub-fields in Table 9 may also be taken as other names, and those exemplified in the present application are not limiting. The number of bits occupied by each sub-field can be adjusted according to the actual situation, and the present application does not limit this.

[0260] Embodiment 4

[0261] The foregoing Embodiments 1 to 3 describe methods for setting the SRP field and the U-SIG reservation field of the U-SIG when one or more stations send an EHT TB PPDU in different scenarios. Embodiment 4 of the present application mainly introduces a spatial multiplexing method based on spatial multiplexing parameters in 802.11be.

[0262] It can be understood that in practical applications, Embodiment 4 of the present application can be implemented in combination with any one of the foregoing Embodiments 1 to 3, or can be implemented alone. The embodiments of the present application do not limit this.

[0263] It is understandable that the first AP and the first STA in the embodiments of the present application belong to the same BSS, denoted as BSS1; the second AP and the second STA belong to another BSS, denoted as BSS2. The first AP and the second AP are located within the OBSS formed by BSS1 and BSS2. Therefore, in order to reduce the energy generated when the second AP sends a parameterized spatial reuse transmission (PSRT) PPDU and the interference to the first AP receiving the EHT TB PPDU, it is necessary to constrain the transmit power of the second AP when sending the PSRT PPDU.

[0264] Optionally, the second AP in the embodiments of the present application can receive the information sent by the first AP and the first STA.

[0265] See Figure 16 , Figure 16 which is a schematic flowchart of the spatial reuse method provided by the embodiments of the present application. As Figure 16 shown, the spatial reuse method includes but is not limited to the following steps:

[0266] S501, the first AP sends a parameterized spatial reuse reception (PSRR) PPDU including a trigger frame, and the trigger frame is used to schedule the first STA to send an EHT TB PPDU. Correspondingly, the first STA receives the trigger frame.

[0267] It is understandable that in addition to the trigger frame, the PSRR PPDU may also include other information. However, the embodiments of the present application focus on the trigger frame part in the PSRR PPDU. Therefore, the embodiments of the present application do not elaborate on the other information included in the PSRR PPDU.

[0268] Specifically, the above PSRR PPDU including the trigger frame is used to schedule the station for uplink data transmission, such as sending an uplink EHT TB PPDU. As previously mentioned Figure 6a or Figure 10As shown, the common information field of the trigger frame includes an uplink spatial reuse (UL Spatial Reuse) field. Among them, the uplink spatial reuse field may include 4 uplink spatial reuse parameter (UL SRP) fields each with a length of 4 bits, which are used to represent the sum of the transmit power of the AP and the maximum interference power that the AP can accept. The 4 UL SRP fields included in this uplink spatial reuse field are the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field respectively. Under different bandwidths, the implementation manners of these 4 UL SRP fields may refer to the implementation manners of any one of the foregoing Embodiment 1 to Embodiment 3, and will not be elaborated here.

[0269] S502, the first STA sends an EHT TB PPDU. Correspondingly, the first AP receives the EHT TB PPDU sent by the station.

[0270] Among them, the "first AP" in the embodiments of the present application is the "AP" described in the foregoing Embodiment 1 to Embodiment 3, and the "first STA" in the embodiments of the present application is the "STA" described in the foregoing Embodiment 1 to Embodiment 3.

[0271] Specifically, the implementation manner of step S502 in the embodiments of the present application may refer to the implementation manner of step S103 in the foregoing Embodiment 1, and will not be elaborated here. Alternatively, the implementation manner of step S502 in the embodiments of the present application may refer to the implementation manner of step S203 in the foregoing Embodiment 2, and will not be elaborated here. Alternatively, the implementation manner of step S502 in the embodiments of the present application may refer to the implementation manner of step S303 in the foregoing Embodiment 3, and will not be elaborated here.

[0272] S503, the second AP determines the transmit power of the parameter space reuse transmission PSRT PPDU according to the values indicated by the SRP1 field and the SRP2 field included in the U-SIG of the EHT TB PPDU, and / or the values indicated by the 4 UL SRP fields included in the common information field of the trigger frame.

[0273] S504, the second AP sends the PSRT PPDU according to the transmit power of the PSRT PPDU. Correspondingly, the second STA receives the PSRT PPDU.

[0274] Specifically, since the first AP and the second AP are located within the OBSS formed by BSS1 and BSS2, the trigger frame sent by the first AP can also be received by the second AP. Therefore, after the first AP sends a PSRR PPDU containing a trigger frame, the second AP receives the PSRR PPDU containing the trigger frame. The trigger frame includes 4 UL SRP fields, and the value indicated by one UL SRP field is equal to the sum of the transmission power of the first AP and the maximum interference power that the first AP can accept. The second AP can also receive the EHT TB PPDU sent by the first STA. The U-SIG of the EHT TB PPDU includes an SRP1 field and an SRP2 field. The value indicated by the SRP1 field is equal to the sum of the transmission power of the first AP on the first subchannel and the maximum interference power that the first AP can accept, and the value indicated by the SRP2 field is equal to the sum of the transmission power of the first AP on the second subchannel and the maximum interference power that the first AP can accept. The bandwidth sizes of the first subchannel and the second subchannel are equal to half of the bandwidth of the EHT TB PPDU, and the frequency of the first subchannel is less than the frequency of the second subchannel.

[0275] After the second AP receives the PSRR PPDU and the EHT TB PPDU (i.e., it is determined that the first STA has sent an EHT TB PPDU), the second AP calculates the transmission power for sending the PSRT PPDU based on the power of the received PSRR PPDU (i.e., the received power level, RPL), and the values indicated by the SRP1 field and the SRP2 field included in the U-SIG and / or the values indicated by the 4 UL SRP fields respectively. The second AP sends the PSRT PPDU according to the calculated transmission power. Correspondingly, the second STA receives the PSRT PPDU and returns a response frame in response to the PSRT PPDU to the second AP.

[0276] See Figure 17 , Figure 17 is a timing schematic diagram of the spatial multiplexing method provided by an embodiment of the present application. Among them, it is assumed that AP1 and AP2 are located within the same OBSS, AP1 and STA1 belong to BSS1, and AP2 and STA2 belong to BSS2. As Figure 14As shown, AP1 (i.e., the above-mentioned first AP) sends a PSRR PPDU containing a trigger frame. After STA1 (i.e., the above-mentioned first STA) receives this PSRR PPDU, after a period of time (such as a short inter-frame space), according to the indication of the trigger frame, it sends an uplink EHT TB PPDU. Since AP1 and AP2 are in the same OBSS, AP2 can receive the PSRR PPDU sent by AP1 and the EHT TB PPDU sent by the STA. After AP2 (i.e., the above-mentioned second AP) receives the PSRR PPDU and the EHT TB PPDU, AP2 then calculates the power it uses to send the PSRT PPDU based on the power of the received PSRR PPDU (i.e., RPL), as well as the 2 SRP values and / or 4 UL SRP values in the EHT TB PPDU. After detecting the transmission of the EHT TB PPDU, AP2 sends the PSRT PPDU according to the calculated power. After STA2 (i.e., the above-mentioned second STA) receives this PSRT PPDU, it sends a block acknowledgment frame (block acknowledge) after a period of time (such as a short inter-frame space) to confirm that STA2 has received the PSRT PPDU.

[0277] Optionally, the transmission power of the PSRT PPDU calculated by the second AP satisfies the following formula:

[0278] (Transmission power of (the second AP sends PSRT) PPDU – log 10 (PSRT PPDU bandwidth / 20 MHz) ≤ SRP – RPL ……………………… (1-1)

[0279] Among them, log in formula (1-1) 10(PSRT PPDU Bandwidth / 20 MHz) represents the bandwidth normalization factor. In Equation (1-1), SRP is the SRP value on a subchannel. In Equation (1-1), RPL is the combined transmit power at the receive antenna connector, over the PSRR PPDU bandwidth, during the non-HE portion of the HE PPDU preamble of the triggering PPDU, averaged over all antennas used to receive the PPDU. The values of SRP and PRL in Equation (1-1) have been bandwidth-normalized. It should be understood that since the value indicated by the UL SRP field is equal to the sum of the transmit power of the AP (here the first AP) and the maximum interference power that the AP (here the first AP) can accept, the maximum interference power that the AP (here the first AP) can accept is determined by the spatial reuse parameter (SRP) value.

[0280] Optionally, the second AP can obtain RPL through the PSRR PPDU, without obtaining the UL SRP in the PSRR PPDU, but obtaining SRP through the U-SIG of the EHT TB PPDU. That is, the second AP calculates the transmit power used to send the PSRT PPDU based on the power of the received PSRR PPDU (i.e., RPL) and the values indicated by the SRP1 field and SRP2 field included in the U-SIG respectively. Alternatively, the second AP can obtain both RPL and UL SRP through the PSRR PPDU. After determining that the EHT TB PPDU has been received, it does not obtain the SRP in the U-SIG. That is, the second AP calculates the transmit power used to send the PSRT PPDU based on the power of the received PSRR PPDU (i.e., RPL) and the values indicated by the 4 UL SRP fields respectively.

[0281] Optionally, the above Equation (1-1) can be equivalent to the following Equation (1-2):

[0282] The normalized transmit power of the second AP ≤ the transmit power of the first AP + the maximum interference power that the first AP can accept - the power of the PSRR PPDU received by the second AP from the first AP …………… (1-2)

[0283] Among them, the right side of formula (1-2), that is: the transmission power of the first AP - the power received by the second AP when the first AP sends a PSRR PPDU, is equal to the path loss between the first AP and the second AP.

[0284] Therefore, formula (1-2) can also be equivalent to the following formula (1-3):

[0285] The normalized transmission power of the second AP ≤ the maximum interference power acceptable to the first AP + the path loss between the first AP and the second AP ……………………………………… (1-3)

[0286] Among them, formula (1-3) can also be equivalent to the following formula (1-4):

[0287] The normalized transmission power of the second AP - the path loss between the first AP and the second AP ≤ the maximum interference power acceptable to the first AP …………………………………………… (1-4)

[0288] Among them, because the left side of formula (1-4), that is, the normalized transmission power of the second AP - the path loss between the first AP and the second AP, represents the interference of the second AP to the first AP, so formula (1-4) can be equivalent to the following formula (1-5):

[0289] The interference of the second AP to the first AP ≤ the maximum interference power acceptable to the first AP ……………………… (1-5)

[0290] It can be seen that the embodiment of the present application provides a spatial multiplexing method for EHT TB PPDU, which can be compatible with the situation of 2 SRP fields in U-SIG, implement spatial multiplexing in the EHT standard, enable devices in an overlapping basic service set to transmit simultaneously, and improve the transmission efficiency.

[0291] As an optional embodiment, the spatial multiplexing method provided by the present application can also be applied to the second STA. Refer to Figure 18 which is another schematic flowchart of the spatial multiplexing method provided by the embodiment of the present application. It can be understood that the first AP and the first STA in the embodiment of the present application belong to the same BSS, denoted as BSS1; the second AP and the second STA belong to another BSS, denoted as BSS2. The first AP and the second STA are located in the OBSS formed by BSS1 and BSS2. Therefore, in order to reduce the energy generated when the second STA sends a response frame to the PSRTPPDU and the interference to the first AP when receiving the EHT TB PPDU, it is necessary to constrain the transmission power of the second STA when sending the response frame.

[0292] Optionally, the second STA in the embodiment of the present application can receive the information sent by the first AP and the first STA.

[0293] As Figure 18 shown, the spatial multiplexing method includes but is not limited to the following steps:

[0294] S601. The first AP sends a parameter spatial reuse receive PSRR PPDU including a trigger frame, and the trigger frame is used to schedule the first STA to send an EHT TB PPDU. Correspondingly, the first STA receives the trigger frame.

[0295] S602. The first STA sends an EHT TB PPDU. Correspondingly, the first AP receives the EHT TB PPDU sent by the station.

[0296] Specifically, for the implementation manners of steps S601 and S602 in the embodiments of the present application, reference may be made to the implementation manners of steps S501 and S502 in the foregoing Figure 16 shown embodiments, which will not be elaborated herein.

[0297] S603. The second AP sends a PSRT PPDU. Correspondingly, the second STA receives the PSRT PPDU.

[0298] S604. The second STA determines the transmission power of the response frame in response to the PSRT PPDU according to one or more of the values indicated by the SRP1 field and the SRP2 field included in the U-SIG of the EHT TB PPDU, the values indicated by the 4 UL SRP fields included in the common information field of the trigger frame, and the value indicated by the UL EHT SRP field.

[0299] S605. The second STA sends the response frame according to the transmission power of the response frame.

[0300] Specifically, for the implementation manners of steps S604 and S605 in the embodiments of the present application, reference may be made to the implementation manners of steps S503 and S504 in the foregoing Figure 16 shown embodiments, which will not be elaborated herein. It should be understood that the transmission power of the response frame in response to the PSRT PPDU in step S604 corresponds to the transmission power of the PSRT PPDU in step S503, and the determination manner of the transmission power of the response frame in step S604 refers to the determination manner of the transmission power of the PSRT PPDU in step S503, which will not be elaborated herein.

[0301] Optionally, the second AP may also be located within the OBSS formed by BSS1 and BSS2. Therefore, in order to reduce the energy generated when the second STA sends the response frame of the PSRT PPDU and the energy generated when the second AP sends the PSRT PPDU, and the interference to the first AP when receiving the EHT TB PPDU, it is necessary to simultaneously restrict the transmit power when the second STA sends the response frame and the transmit power when the second AP sends the PSRT PPDU. Therefore, when the first AP, the second STA, and the second AP are all located within the OBSS formed by BSS1 and BSS2, before the second AP sends the PSRT PPDU (i.e., before step S603), the second AP may determine the transmit power of the PSRT PPDU according to one or more of the values indicated by the SRP1 field and the SRP2 field included in the U-SIG of the EHT TB PPDU, the values indicated by the 4 UL SRP fields included in the common information field of the trigger frame, and the value indicated by the UL EHT SRP field. At this time, step S603 is specifically to send the PSRT PPDU according to the transmit power of the PSRT PPDU.

[0302] It can be seen that the embodiment of the present application provides a spatial multiplexing method for the EHT TB PPDU, which can be compatible with the case of 1 SRP field or 2 SRP fields in the U-SIG, realizes spatial multiplexing in the EHT standard, enables devices in the overlapping basic service sets to transmit simultaneously, and improves the transmission efficiency.

[0303] The above content elaborates in detail the method provided by the present application. To facilitate the implementation of the above solution of the embodiment of the present application, the embodiment of the present application also provides a corresponding device or equipment.

[0304] The embodiment of the present application can divide the functions of the AP and the STA according to the above method examples. For example, each function module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software function module. It should be noted that the division of modules in the embodiment of the present application is illustrative, only a logical function division, and there may be other division methods in actual implementation. The following will be combined with Figures 19 to 22 Describe in detail the communication device of the embodiment of the present application. Among them, the communication device is an access point or a station. Further, the communication device can be a device in the AP; or, the communication device is a device in the STA.

[0305] In the case of adopting an integrated unit, see Figure 19 , Figure 19It is a schematic structural diagram of the communication device 1 provided by an embodiment of the present application. The communication device 1 can be an AP or a chip in the AP, such as a Wi-Fi chip, etc. As Figure 19 shown, the communication device 1 includes a transceiver unit 11 and a processing unit 12.

[0306] In the first design, the processing unit 12 is used to generate a trigger frame, and the trigger frame is used to trigger a station to send an EHT TB PPDU; the transceiver unit 11 is further used to receive the EHT TB PPDU sent by the station, and the values indicated by the spatial reuse parameter SRP1 field and the SRP2 field in the common signaling field U-SIG of the EHT TB PPDU are respectively determined based on the values indicated by one or more uplink spatial reuse parameter UL SRP fields in the common information field of the trigger frame. Specifically, reference can be made to the description of the EHT TB PPDU in step S103 of the foregoing Embodiment 1, which will not be elaborated here..

[0307] In the second design, the processing unit 12 is used to generate a trigger frame; the transceiver unit 11 is used to send the trigger frame. The trigger frame is used to trigger a station to send an EHT TB PPDU, and the common information field of the trigger frame includes 4 UL SRP fields, and the HE-SIG A2 reserved field and the reserved field of the common information field are used as the indication of the UL EHT spatial reuse parameter, including the UL EHT SRP field;

[0308] The transceiver unit 11 is further used to receive the EHT TB PPDU sent by the station, and the U-SIG of the EHT TB PPDU includes two SRP fields, namely the SRP1 field and the SRP2 field.

[0309] When the bandwidth of the EHT TB PPDU is 20 / 40 / 80 / 160 MHz and it is a non-aggregated PPDU, the value of the SRP1 field in the U-SIG is equal to the minimum value of the UL SR1 field and the UL SR2 field among the 4 spatial reuse fields indicated by the uplink spatial reuse field of the trigger frame, which can be expressed as SRP1 = min{UL SRP1, UL SRP2}.

[0310] The value of the SRP2 field in the U-SIG can be equal to the minimum value of the UL SR3 field and the UL SR4 field among the 4 spatial reuse fields indicated by the uplink spatial reuse field of the trigger frame, which can be expressed as SRP2 = min{SRP3, UL SRP4}.

[0311] In one implementation manner, such as Figure 8bAs shown, when the EHT bandwidth is 320 MHz or the TB PPDU is an aggregated PPDU, the value of the SRP1 field in the U-SIG is equal to the value of the SRP2 field, and both are equal to the minimum of the 4 spatial reuse fields indicated in the uplink spatial reuse field in the trigger frame, i.e., SRP1 = SRP2 = min{UL SRP1, UL SRP2, UL SRP3, UL SRP4}.

[0312] Specifically, reference can be made to the description of the EHT TB PPDU or the aggregated PPDU in step S203 of the foregoing Embodiment 1, which will not be elaborated herein.

[0313] It should be understood that the communication device 1 of the first design and the second design can correspondingly execute the foregoing Embodiment 1, and the above operations or functions of each unit in the communication device 1 are respectively for implementing the corresponding operations of the AP in the foregoing Embodiment 1. For the sake of brevity, they will not be elaborated herein.

[0314] In the third design, the processing unit 12 generates a trigger frame, and the transceiver unit 11 is used to send the trigger frame. The HE-SIG-A2 reserved field and the reserved field in the common information field of the trigger frame are set as the uplink EHT PPDU bandwidth subfield, the HE / EHT subfield, and the uplink EHT spatial reuse field. The uplink EHT spatial reuse field separately indicates the spatial reuse parameters in the EHT TB PPDU, or cooperates with the uplink spatial reuse field to indicate the spatial reuse parameters in the EHT TB PPDU. Specifically, reference can be made to the description of the triggerer in step S301 of the foregoing Embodiment 2, which will not be elaborated herein.

[0315] The transceiver unit 11 is further used to receive the EHT TB PPDU or the aggregated PPDU sent by the station. The U-SIG of the EHT TB PPDU may include one SRP field or two SRP fields. Specifically, reference can be made to the description of the EHT TB PPDU or the aggregated PPDU in step S303 of the foregoing Embodiment 2, which will not be elaborated herein.

[0316] It should be understood that the communication device 1 of the third design can correspondingly execute the foregoing Embodiment 2, and the above operations or functions of each unit in the communication device 1 are respectively for implementing the corresponding operations of the AP in the foregoing Embodiment 2. For the sake of brevity, they will not be elaborated herein.

[0317] In the fourth design, the processing unit 12 is used to generate a trigger frame. The transceiver unit 11 is used to send the trigger frame, which is used to trigger the station to send an EHT TB PPDU. The trigger frame carries first indication information, which is used to indicate the value of the SRP1 field and / or the SRP2 field in the U-SIG of the EHT TB PPDU. Optionally, the trigger frame also carries second indication information, which is used to indicate the value of the U-SIG reserved field in the U-SIG of the EHT TB PPDU. Specifically, reference can be made to step S401 in Embodiment 3 and the description of the trigger frame in this embodiment summary, which will not be elaborated here.

[0318] The transceiver unit 11 is also used to receive the EHT TB PPDU sent by the station. For the settings of the SRP field and the U-SIG reserved field in the U-SIG of the EHT TB PPDU, reference can be made to the description in Embodiment 3, which will not be elaborated here.

[0319] It should be understood that the communication device 1 in the fourth design can correspondingly execute the foregoing Embodiment 4, and the above operations or functions of each unit in the communication device 1 are respectively for implementing the corresponding operations of the AP in the foregoing Embodiment 4. For the sake of brevity, they will not be elaborated here.

[0320] See Figure 20 , Figure 20 is a schematic structural diagram of the communication device 2 provided in the embodiment of the present application. The communication device 2 can be an STA or a chip in the STA, such as a Wi-Fi chip, etc. As Figure 17 shown, the communication device 2 includes a transceiver unit 21 and a processing unit 22.

[0321] In the first design, the transceiver unit 21 is used to receive a trigger frame, which is used to trigger the communication device 2 to send an EHT TB PPDU. The transceiver unit 21 is also used to send an EHT TB PPDU, and the U-SIG of the EHT TB PPDU includes a U-SIG reserved field, an SRP1 field, or includes an SRP1 field and an SRP2 field.

[0322] Optionally, the processing unit 22 includes a U-SIG reserved field setting subunit 221 and an SRP field setting subunit 222.

[0323] Among them, the U-SIG reserved field setting subunit 221 is used to set the value of the U-SIG reserved field. The value of the U-SIG reserved field is determined based on whether the trigger frame carries a special user field. When the trigger frame does not carry a special user information field, the value of the U-SIG reserved field is set to a default value; when the trigger frame carries a special user information field, the value of the U-SIG reserved field is determined based on the value of the U-SIG reserved indication field in the special user information field.

[0324] The SRP field setting subunit 222 is used to set the values of the SRP1 field and the SRP2 field in the U-SIG of the EHT TB PPDU.

[0325] The values of the SRP1 field and the SRP2 field are respectively determined based on one or more values indicated by the ULSRP fields in the common information field of the trigger frame, the value indicated by the UL EHT SRP field, and one or more of the values indicated by the UL SRP fields in the special user information field of the trigger frame.

[0326] It should be understood that the communication device 2 of the first design can correspondingly execute the foregoing first to third embodiments, and the above operations or functions of each unit in the communication device 2 are respectively for implementing the corresponding operations of the STA in the foregoing first to third embodiments. For the sake of brevity, they will not be described herein again.

[0327] See Figure 21 , Figure 21 is a schematic structural diagram of the communication device 3 provided by the embodiment of the present application. The communication device 3 can be an AP or a STA. Further, the communication device 3 can be a chip in an AP or a STA, such as a Wi-Fi chip, etc. As Figure 21 shown, the communication device 3 includes a determination unit 31 and a transceiver unit 32.

[0328] In one design, the communication device 3 is an AP or a chip in an AP. The determination unit 31 is used to determine the transmission power of the PSRT PPDU based on one or more of the values respectively indicated by the SRP1 field and the SRP2 field included in the U-SIG of the EHT TBPPDU, the values respectively indicated by the 4 UL SRP fields included in the common information field of the trigger frame, and the value indicated by the UL EHT SRP field in the HE-SIG-A2 of the common information field of the trigger frame; the transceiver unit 32 is used to send the PSRT PPDU according to the transmission power of the PSRTPPDU.

[0329] Optionally, the transceiver unit 32 is further configured to receive a trigger frame, where the trigger frame includes four UL SRP fields, and the value indicated by one UL SRP field is the sum of the transmit power of a first AP on a subchannel and the maximum interference power that the first AP can accept. The communication device 3 and the first AP are located in the same OBSS. Here, the first AP refers to the AP that sends the trigger frame.

[0330] Optionally, the transceiver unit 32 is further configured to receive an EHT TB PPDU. The U-SIG of the EHT TB PPDU includes an SRP1 field and an SRP2 field. The value indicated by the SRP1 field is the sum of the transmit power of the first AP on a first subchannel and the maximum interference power that the first AP can accept. The value indicated by the SRP2 field is the sum of the transmit power of the first AP on a second subchannel and the maximum interference power that the first AP can accept. The bandwidths of the first subchannel and the second subchannel are equal to half of the bandwidth of the EHT TB PPDU, and the frequency of the first subchannel is less than the frequency of the second subchannel. The communication device 3 and the first AP are located in the same OBSS.

[0331] It should be understood that the communication device 3 of this design can correspondingly execute the method described above Figure 13 shown, and the above operations or functions of each unit in the communication device 3 are respectively for implementing the corresponding operations of the second AP in the above Figure 13 for the sake of brevity, details are not described here again.

[0332] In another design, the communication device 3 is a STA or a chip in a STA. The determining unit 31 is configured to determine the transmit power of a response frame in response to a PSRT PPDU according to one or more of the values indicated by the SRP1 field and the SRP2 field included in the U-SIG of the EHT TB PPDU, the values indicated by the four UL SRP fields included in the common information field of the trigger frame, and the value indicated by the UL EHT SRP field in the HE-SIG-A2 of the common information field of the trigger frame; the transceiver unit 32 is configured to send the response frame according to the transmit power of the response frame.

[0333] Optionally, the transceiver unit 32 is further configured to receive a trigger frame, where the trigger frame includes four UL SRP fields, and the value indicated by one UL SRP field is the sum of the transmit power of a first AP on a subchannel and the maximum interference power that the first AP can accept. The communication device 3 and the first AP are located in the same OBSS. Here, the first AP refers to the AP that sends the trigger frame.

[0334] Optionally, the transceiver unit 32 is further configured to receive an EHT TB PPDU, where the U-SIG of the EHT TB PPDU includes an SRP1 field and an SRP2 field. The value indicated by the SRP1 field is the sum of the transmission power of the first AP on the first sub-channel and the maximum interference power that the first AP can accept. The value indicated by the SRP2 field is the sum of the transmission power of the first AP on the second sub-channel and the maximum interference power that the first AP can accept. The bandwidths of the first sub-channel and the second sub-channel are equal to half of the bandwidth of the EHT TB PPDU, and the frequency of the first sub-channel is less than the frequency of the second sub-channel. The communication device 3 and the first AP are located within the same OBSS.

[0335] Optionally, the transceiver unit 32 is further configured to receive a PSRT PPDU sent by a second AP.

[0336] Wherein, in any of the above designs, the determining unit 31 may be a processing unit.

[0337] It should be understood that the communication device 3 of this design can correspondingly execute the foregoing Figure 18 shown method, and the above operations or functions of each unit in the communication device 3 are respectively for implementing the corresponding operations of the second STA in the foregoing Figure 18 For the sake of brevity, details are not described herein again.

[0338] The AP and STA of the embodiments of the present application are introduced above. The following introduces the possible product forms of the AP and STA. It should be understood that any product form that has the functions of the AP described above Figure 19 any product form that has the functions of the STA described above Figure 20 any product form that has the functions of the AP or STA described above Figure 21 falls within the protection scope of the embodiments of the present application. It should also be understood that the following introduction is only for illustration and does not limit the product forms of the AP and STA of the embodiments of the present application to this.

[0339] As a possible product form, the AP and STA described in the embodiments of the present application can be implemented by a general bus architecture.

[0340] For ease of explanation, refer to Figure 22 , Figure 22 is a schematic structural diagram of a communication device 1000 provided by an embodiment of the present application. The communication device 1000 can be an AP or a STA, or a chip therein. Figure 22 Only the main components of the communication device 1000 are shown. In addition to the processor 1001 and the transceiver 1002, the communication device may further include a memory 1003 and an input / output device (not shown in the figure).

[0341] The processor 1001 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process the data of software programs. The memory 1003 is mainly used to store software programs and data. The transceiver 1002 may include a control circuit and an antenna. The control circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used to receive data input by the user and output data to the user.

[0342] After the communication device is powered on, the processor 1001 can read the software program in the memory 1003, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be wirelessly transmitted, the processor 1001 performs baseband processing on the data to be transmitted and then outputs a baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001. The processor 1001 converts the baseband signal into data and processes the data.

[0343] In another implementation, the radio frequency circuit and the antenna can be set independently of the processor performing baseband processing. For example, in a distributed scenario, the radio frequency circuit and the antenna can be independent of the communication device and arranged in a remote manner.

[0344] Among them, the processor 1001, the transceiver 1002, and the memory 1004 can be connected through a communication bus.

[0345] In one design, the communication device 1000 can be used to perform the functions of the AP in the first embodiment above: the processor 1001 can be used to generate Figure 7a the trigger frame sent in step S101, and / or be used for other processes of the technology described herein; the transceiver 1002 can be used to perform Figure 7a steps S101 and S104 in

[0346] In another design, the communication device 1000 can be used to perform the functions of the STA in the first embodiment above: the processor 1001 can be used to generate Figure 7a the EHT TB PPDU sent in step S103, and / or be used for other processes of the technology described herein; the transceiver 1002 can be used to perform Figure 7aSteps S102 and S103 therein, and / or other processes for the technologies described herein.

[0347] In one design, the communication device 1000 can be used to perform the functions of the AP in the foregoing Embodiment 1: The processor 1001 can be used to generate Figure 8a the trigger frame sent in step S201 therein, and / or other processes for performing the technologies described herein; the transceiver 1002 can be used to perform Figure 8a steps S201 and S204 therein, and / or other processes for the technologies described herein.

[0348] In another design, the communication device 1000 can be used to perform the functions of the STA in the foregoing Embodiment 1: The processor 1001 can be used to generate Figure 8a the EHT TB PPDU sent in step S203 therein, and / or other processes for performing the technologies described herein; the transceiver 1002 can be used to perform Figure 8a steps S202 and S203 therein, and / or other processes for the technologies described herein.

[0349] In one design, the communication device 1000 can be used to perform the functions of the AP in the foregoing Embodiment 2: The processor 1001 can be used to generate Figure 11 the trigger frame sent in step S301 therein, and / or other processes for performing the technologies described herein; the transceiver 1002 can be used to perform Figure 11 steps S301 and S304 therein, and / or other processes for the technologies described herein.

[0350] In another design, the communication device 1000 can be used to perform the functions of the STA in the foregoing Embodiment 2: The processor 1001 can be used to generate Figure 11 the EHT TB PPDU sent in step S303 therein, and / or other processes for performing the technologies described herein; the transceiver 1002 can be used to perform Figure 11 steps S302 and S303 therein, and / or other processes for the technologies described herein.

[0351] In one design, the communication device 1000 can be used to perform the functions of the AP in the foregoing Embodiment 3: The processor 1001 can be used to generate Figure 14 the trigger frame sent in step S401 therein, and / or other processes for performing the technologies described herein; the transceiver 1002 can be used to perform Figure 14 steps S401 and S404 therein, and / or other processes for the technologies described herein.

[0352] In another design, the communication device 1000 can be used to perform the functions of the STA in the foregoing Embodiment 3: The processor 1001 can be used to generate Figure 14 the EHT TB PPDU sent in step S403 in, and / or for other processes of implementing the technologies described herein; The transceiver 1002 can be used to perform Figure 14 step S402 and step S403 in, and / or for other processes of the technologies described herein.

[0353] In one design, the communication device 1000 can be used to perform the functions of the second AP in the foregoing Embodiment 4: The processor 1001 can be used to perform Figure 16 step S503 in, and / or for other processes of implementing the technologies described herein; The transceiver 1002 can be used to perform Figure 16 step S504 in, and / or for other processes of the technologies described herein.

[0354] In one design, the communication device 1000 can be used to perform the functions of the second STA in the foregoing Embodiment 4: The processor 1001 can be used to perform Figure 18 step S604 in, and / or for other processes of implementing the technologies described herein; The transceiver 1002 can be used to perform Figure 18 step S605 in, and / or for other processes of the technologies described herein.

[0355] In any of the above designs, the processor 1001 may include a transceiver for implementing receiving and sending functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receiving and sending functions may be separate or integrated together. The above transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or the above transceiver circuit, interface, or interface circuit may be used for signal transmission or transfer.

[0356] In any of the above designs, the processor 1001 may store instructions, and the instructions may be a computer program. When the computer program runs on the processor 1001, the communication device 1000 can be enabled to execute the methods described in any of the above method embodiments. The computer program may be solidified in the processor 1000. In this case, the processor 1001 may be implemented by hardware.

[0357] In one implementation, the communication device 1000 may include circuitry that can implement the functions of transmitting, receiving, or communicating in the foregoing method embodiments. The processor and transceiver described in this application may be implemented on an integrated circuit (IC), analog IC, radio frequency integrated circuit (RFIC), mixed-signal IC, application specific integrated circuit (ASIC), printed circuit board (PCB), electronic device, etc. The processor and transceiver may also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), BiCMOS, silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0358] The scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be restricted by Figure 19 . The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0359] (1) An independent integrated circuit (IC), or chip, or chip system or subsystem;

[0360] (2) A collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and computer programs;

[0361] (3) An ASIC, such as a modem;

[0362] (4) A module that can be embedded in other devices;

[0363] (5) A receiver, terminal, smart terminal, cellular phone, wireless device, handset, mobile unit, vehicle-mounted device, network device, cloud device, artificial intelligence device, etc.;

[0364] (6) Others, etc.

[0365] As a possible product form, the AP and STA described in the embodiments of this application may be implemented by a general-purpose processor.

[0366] The general - purpose processor for implementing the AP includes a processing circuit and an input - output interface that is internally connected and communicates with the processing circuit.

[0367] In one design, the general - purpose processor can be used to perform the functions of the AP in the first foregoing embodiment. Specifically, the processing circuit can be used to generate Figure 7a the trigger frame sent in step S101, and / or be used for other processes of the technologies described herein; the input - output interface is used to perform Figure 7a step S101 and step S104 in

[0368] In one design, the general - purpose processor can be used to perform the functions of the AP in the first foregoing embodiment. Specifically, the processing circuit is used to generate Figure 8a the trigger frame sent in step S201, and / or be used for other processes of the technologies described herein; the input - output interface is used to perform Figure 8a step S201 and step S204 in

[0369] In one design, the general - purpose processor can be used to perform the functions of the AP in the second foregoing embodiment. Specifically, the processing circuit is used to generate Figure 11 the trigger frame sent in step S301, and / or be used for other processes of the technologies described herein; the input - output interface is used to perform Figure 11 step S301 and step S304 in

[0370] In one design, the general - purpose processor can be used to perform the functions of the AP in the third foregoing embodiment. Specifically, the processing circuit is used to generate Figure 14 the trigger frame sent in step S401, and / or be used for other processes of the technologies described herein; the input - output interface is used to perform Figure 14 step S401 and step S404 in

[0371] In one design, the general - purpose processor can be used to perform the functions of the second AP in the fourth foregoing embodiment. Specifically, the processing circuit is used to perform Figure 16 step S503 in Figure 16 and / or be used for other processes of the technologies described herein; the input - output interface is used to perform

[0372] The general - purpose processor for implementing the STA includes a processing circuit and an input - output interface that is internally connected and communicates with the processing circuit.

[0373] In one design, the general - purpose processor can be used to perform the functions of the STA in the first - mentioned embodiment. Specifically, the processing circuit is used to generate Figure 7a the EHT TB PPDU sent in step S103, and / or for performing other processes of the technologies described herein; the input - output interface is used to perform Figure 7a step S102 and step S103 in

[0374] In one design, the general - purpose processor can be used to perform the functions of the STA in the first - mentioned embodiment. Specifically, the processing circuit is used to generate Figure 8a the EHT TB PPDU sent in step S203, and / or for performing other processes of the technologies described herein; the input - output interface is used to perform Figure 8a step S202 and step S203 in

[0375] In one design, the general - purpose processor can be used to perform the functions of the STA in the second - mentioned embodiment. Specifically, the processing circuit is used to generate Figure 11 the EHT TB PPDU sent in step S303, and / or for performing other processes of the technologies described herein; the input - output interface is used to perform Figure 11 step S302 and step S303 in

[0376] In one design, the general - purpose processor can be used to perform the functions of the STA in the third - mentioned embodiment. Specifically, the processing circuit is used to generate Figure 14 the EHT TB PPDU sent in step S403, and / or for performing other processes of the technologies described herein; the input - output interface is used to perform Figure 14 step S402 and step S403 in

[0377] In one design, the general - purpose processor can be used to perform the functions of the second STA in the fourth - mentioned embodiment. Specifically, the processing circuit is used to perform Figure 18 step S604 in Figure 18 and / or for performing other processes of the technologies described herein; the input - output interface can be used to perform

[0378] It should be understood that the communication devices in the above various product forms have any functions of the AP or STA in the above method embodiments, which will not be elaborated here.

[0379] An embodiment of the present application further provides a computer-readable storage medium, in which computer program code is stored. When the above-mentioned processor executes the computer program code, the electronic device executes the method in any of the foregoing embodiments.

[0380] An embodiment of the present application further provides a computer program product. When the computer program product runs on a computer, the computer is enabled to execute the method in any of the foregoing embodiments.

[0381] An embodiment of the present application further provides a communication device. This device can exist in the product form of a chip. The structure of this device includes a processor and an interface circuit. The processor is used to communicate with other devices through a receiving circuit, so that this device executes the method in any of the foregoing embodiments.

[0382] An embodiment of the present application further provides a wireless communication system, including an AP and an STA. The AP and the STA can execute the method in any of the foregoing embodiments.

[0383] The steps of the method or algorithm described in combination with the disclosed content of the present application can be implemented in a hardware manner or by a processor executing software instructions. The software instructions can be composed of corresponding software modules. The software modules can be stored in a random access memory (Random Access Memory, RAM), flash memory, erasable programmable read-only memory (Erasable Programmable ROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disks, mobile hard disks, compact disc read-only memory (CD-ROM), or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in the core network interface device. Of course, the processor and the storage medium can also exist as discrete components in the core network interface device.

[0384] Those skilled in the art should be able to realize that in one or more of the above examples, the functions described in this application can be implemented by hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. The computer-readable medium includes computer-readable storage media and communication media, where the communication media includes any medium that facilitates the transfer of a computer program from one place to another. The storage media can be any available medium accessible by a general-purpose or special-purpose computer.

[0385] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not used to limit the protection scope of this application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of this application should be included within the protection scope of this application.

Claims

1. A method for indicating spatial multiplexing parameters in a trigger frame, characterized in that, including: An access point AP sends a trigger frame, and the trigger frame is used to trigger a station to send a Trigger-based Extended High Throughput Physical Layer Protocol Data Unit (EHT TB PPDU); The AP receives the EHT TB PPDU sent by the station. The Universal Signaling field (U-SIG) of the EHT TB PPDU includes two Spatial Reuse Parameter (SRP) fields, namely an SRP1 field and an SRP2 field. The value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value among the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field.

2. The method according to claim 1, wherein The Universal Signaling field (U-SIG) of the EHT TB PPDU further includes a U-SIG reserved field; the value of the U-SIG reserved field is a default value.

3. A communication device applied to a wireless local area network (WLAN), characterized in that, including: A processor for generating a trigger frame; A transceiver for sending the trigger frame, and the trigger frame is used to trigger a station to send a Trigger-based Extended High Throughput Physical Layer Protocol Data Unit (EHT TB PPDU); The transceiver for receiving the EHT TB PPDU sent by the station. The Universal Signaling field (U-SIG) of the EHT TB PPDU includes two Spatial Reuse Parameter (SRP) fields, namely an SRP1 field and an SRP2 field. The value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value among the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field.

4. The communication device according to claim 3, wherein The Universal Signaling field (U-SIG) of the EHT TB PPDU further includes a U-SIG reserved field; the value of the U-SIG reserved field is a default value.

5. A method for determining a spatial multiplexing parameter field in a physical layer protocol data unit, characterized in that, including: A station STA receives a trigger frame, and the trigger frame is used to trigger the station to send an Extended High Throughput Physical Layer Protocol Data Unit (EHT TB PPDU); The STA sends the EHT TB PPDU. The U-SIG of the EHT TB PPDU includes two Spatial Reuse Parameter (SRP) fields, namely an SRP1 field and an SRP2 field. The value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value among the values indicated by the ULSRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field.

6. The method according to claim 5, characterized in that The Universal Signaling field (U-SIG) of the EHT TB PPDU further includes a U-SIG reserved field; the value of the U-SIG reserved field is a default value.

7. A communication device applied to a wireless local area network (WLAN), characterized in that, including: A transceiver for receiving a trigger frame, and the trigger frame is used to trigger the communication device to send an Extended High Throughput Physical Layer Protocol Data Unit (EHT TB PPDU); A processor for generating the EHT TB PPDU; two spatial reuse parameter (SRP) fields, namely an SRP1 field and an SRP2 field, are included in the U-SIG of the EHT TB PPDU, and the value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value among the values indicated by a UL SRP1 field, a UL SRP2 field, a UL SRP3 field, and a UL SRP4 field; a transceiver for transmitting the EHT TB PPDU.

8. The communication device according to claim 7, characterized in that, The general signaling field U-SIG of the EHT TB PPDU further includes a U-SIG reserved field; the value of the U-SIG reserved field is a default value.

9. A method for transmitting a trigger frame, characterized in that Including: An access point (AP) transmits a trigger frame for triggering a station to send a trigger-based extremely high throughput physical layer protocol data unit (EHT TB PPDU). Two spatial reuse parameter (SRP) fields, namely an SRP1 field and an SRP2 field, are included in the general signaling field U-SIG of the EHT TB PPDU, and the value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value among the values indicated by a UL SRP1 field, a UL SRP2 field, a UL SRP3 field, and a UL SRP4 field; the trigger frame further includes a U-SIG reserved indication field for indicating the value of the U-SIG reserved field in the EHT TB PPDU. The AP receives the EHT TB PPDU sent by the station, and the value of the U-SIG reserved field in the general signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reserved indication field of the trigger frame.

10. The method according to claim 9, wherein The U-SIG reserved indication field is located in a special user information field of the user information list field of the trigger frame.

11. The method according to claim 10, wherein The associated identifier AID12 of the special user information field is a preset value or an incomplete AID12 value.

12. The method according to claim 10 or 11, characterized in that, The special user information field further includes: one UL SRP field for U-SIG; or two UL SRP fields for U-SIG.

13. The method according to claim 9, wherein, The common information field of the trigger frame includes 4 uplink spatial reuse parameter (UL SRP) fields; or further includes an uplink EHT spatial reuse parameter (UL EHT SRP) field located in a reserved field of the common information field.

14. A communication device for a wireless local area network (WLAN), characterized in that, Including: A processor for generating a trigger frame for triggering a station to send a trigger-based extremely high throughput physical layer protocol data unit (EHT TB PPDU). The general signaling field U-SIG of the EHT TB PPDU includes two spatial reuse parameter SRP fields, namely an SRP1 field and an SRP2 field. The value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value among the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field. The trigger frame further includes a U-SIG reservation indication field for indicating the value of the U-SIG reservation field in the EHT TB PPDU. A transceiver for transmitting the trigger frame. The transceiver is further configured to receive the EHT TB PPDU sent by the station. The value of the U-SIG reservation field in the general signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field of the trigger frame.

15. The communication device according to claim 14, wherein The U-SIG reservation indication field is located in the special user information field of the user information list field of the trigger frame.

16. The communication device according to claim 15, characterized in that, The associated identifier AID12 of the special user information field is a preset value or an incomplete AID12 value.

17. The communication device according to claim 15 or 16, wherein The special user information field further includes: one UL SRP field for U-SIG; or two UL SRP fields for U-SIG.

18. The communication device according to claim 17, wherein The common information field of the trigger frame includes 4 uplink spatial reuse parameter UL SRP fields; or further includes an uplink EHT spatial reuse parameter UL EHT SRP field located in the reservation field of the common information field.

19. A transmission method for a physical layer protocol data unit (PPDU), characterized in that, Including: The station STA receives a trigger frame for triggering the station to send an EHT TB PPDU. The general signaling field U-SIG of the EHT TBPPDU includes two spatial reuse parameter SRP fields, namely an SRP1 field and an SRP2 field. The value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value among the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field. The trigger frame further includes a U-SIG reservation indication field for indicating the value of the U-SIG reservation field in the EHT TBPPDU. The STA sends an EHT TB PPDU. The value of the U-SIG reservation field in the general signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field of the trigger frame.

20. The method according to claim 19, characterized in that, The U-SIG reservation indication field is located in the special user information field of the user information list field of the trigger frame.

21. The method according to claim 20, wherein, The associated identifier AID12 of the special user information field is a preset value or an incomplete AID12 value.

22. The method according to claim 20 or 21, characterized in that, The special user information field further includes: one UL SRP field for U-SIG; or two UL SRP fields for U-SIG.

23. The method according to claim 19, characterized in that, The common information field of the trigger frame includes 4 uplink spatial multiplexing parameter UL SRP fields; or further includes an uplink EHT spatial multiplexing parameter UL EHT SRP field located in the reserved field of the common information field.

24. A communication device applied to a wireless local area network (WLAN), characterized in that, Comprising: A transceiver for receiving a trigger frame for triggering a station to send an EHT TB PPDU; The general signaling field U-SIG of the EHT TB PPDU includes two spatial multiplexing parameter SRP fields, namely an SRP1 field and an SRP2 field. The value of the SRP1 field is equal to the value of the SRP2 field, and both are equal to the minimum value among the values indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field; the trigger frame further includes a U-SIG reserved indication field for indicating the value of the U-SIG reserved field in the EHT TB PPDU; A processor for generating the EHT TB PPDU, and the value of the U-SIG reserved field in the general signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reserved indication field of the trigger frame; The transceiver is further configured to send the EHT TB PPDU, and the value of the U-SIG reserved field in the general signaling field U-SIG of the EHT TB PPDU is determined based on the value of the U-SIG reserved indication field of the trigger frame.

25. The communication device according to claim 24, wherein The U-SIG reserved indication field is located in the special user information field of the user information list field of the trigger frame.

26. The communication device according to claim 25, wherein, The associated identifier AID12 of the special user information field is a preset value or an incomplete AID12 value.

27. The communication device according to claim 25, characterized in that, The special user information field further includes: one UL SRP field for U-SIG; or two UL SRP fields for U-SIG.

28. The communication device according to claim 24, wherein, The common information field of the trigger frame includes 4 uplink spatial multiplexing parameter UL SRP fields; or further includes an uplink EHT spatial multiplexing parameter UL EHT SRP field located in the reserved field of the common information field.

29. A computer-readable storage medium, characterized in that, Instructions are stored in the computer-readable storage medium, and when the instructions are run on a computer, the computer is caused to execute the method according to any one of claims 1-2 or 5-6 or 9-13 or 19-23.

30. A computer program product comprising instructions, characterized in that, When the instructions are run on a computer, the computer is caused to execute the method according to any one of claims 1-2 or 5-6 or 9-13 or 19-23.

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