Method for displaying space reuse parameters and method and device for determining space reuse parameter fields

Abstract

The present application relates to the field of wireless communication and applies to wireless short-range networks supporting the 802.11be standard. In particular, the present application relates to a method for indicating spatial reuse parameters in a trigger frame, and a corresponding method and related apparatus for determining a spatial reuse parameter field in a PPDU. The method comprises: an access point (AP) transmits a trigger frame, and the trigger frame is used to trigger a station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU). The station determines a value indicated by an uplink EHT spatial reuse parameter (UL EHT SRP) and a value indicated by one or more uplink spatial reuse parameters (UL SRP) within the common information field of the trigger frame, based on one or more of these values. The STA transmits the EHT TB PPDU to the AP. While implementing this embodiment of the present application, the spatial reuse parameter field of the EHT TB PPDU may be set without changing the frame structure of the U-SIG.

Description

Technology Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a method for indicating a spatial reuse parameter, a method for determining a spatial reuse parameter field in a corresponding physical layer protocol data unit (PPDU), a trigger frame transmission method, a PPDU transmission method, and a related apparatus. Background Technology

[0002] Wireless local area networks (WLANs), including the currently discussed 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, and 802.11be, have been developed over several generations. The 802.11ax standard can be referred to as the high efficiency (HE) standard, and the 802.11be standard can be referred to as the extremely high throughput (EHT) standard or the Wi-Fi 7 standard. Unlike 802.11ax, 802.11be uses ultra-large bandwidths, such as 320 MHz, to achieve ultra-high transmission speeds and support ultra-high user density scenarios. In the following, stations that support the 802.11ax standard but not the 802.11be standard are referred to as HE stations, and stations that support the 802.11be standard are referred to as EHT stations.

[0003] 802.11ax WLAN devices (e.g., access points (APs) and stations (STAs)) support only half-duplex transmission. In other words, within the same spectrum bandwidth or channel, only one device can transmit information, while the other device can only receive signals and cannot transmit them. This prevents interference with the device currently transmitting. However, as the density of WLAN devices increases, it has become more common for basic service sets (BSSs) to overlap with other BSSs. In other words, overlapping BSSs (OBSSs) have become more common. Since a WLAN device located in an OBSS can receive physical protocol data units (PPDUs, also called packets or data packets) from two BSSs, conventional methods reduce transmission efficiency. Therefore, 802.11ax proposes a spatial reuse method. By adaptively adjusting transmission power, WLAN devices of an overlapping basic service set can perform transmissions simultaneously. This significantly improves transmission efficiency. In particular, in 802.11ax, space reuse was introduced to the trigger frame-based uplink scheduling transmission method.When transmitting a high efficient trigger based physical layer protocol data unit (HE TB PPDU), the station copies the values ​​of the four uplink spatial reuse parameter (UL SRP) fields (also called uplink parameterized spatial reuse (UL PSR) fields) of the uplink spatial reuse (UL spatial reuse) field of the common information field of the received trigger frame to the four 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 still uses the trigger frame-based uplink scheduling transmission method from the 802.11ax standard, and designing trigger frames to schedule EHT stations or to schedule both HE stations and EHT stations has become an urgent task to be solved. means of solving the problem

[0005] Embodiments of the present application provide a method and apparatus for indicating space reuse parameters in a trigger frame, and a method and apparatus for determining a space reuse parameter field in a PPDU. According to the technical solution provided in the embodiments of the present application, in a scenario where a trigger frame is used to schedule an EHT station or both an HE station and an EHT station, at least one of the space reuse parameter field and the U-SIG reservation field of the EHT TB PPDU can be set based on the trigger frame without changing the frame structure of the EHT TB PPDU.

[0006] The present application is described below in various aspects. It will be understood that the following embodiments and beneficial effects of different aspects may be referenced to one another.

[0007] According to a first aspect, the present application provides a method for indicating a space reuse parameter in a trigger frame, which comprises:

[0008] The access point (AP) transmits a trigger frame, and the trigger frame is used to trigger the station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU).

[0009] The AP receives an EHT TB PPDU transmitted by the station, and the value indicated by the space reuse parameter (SRP) in the universal signal field (U-SIG) of the EHT TB PPDU is determined based on at least one of the value indicated by the uplink EHT space reuse parameter (UL EHT SRP) in the common information field of the trigger frame and the value indicated by one or more uplink space reuse parameter (UL SRP) fields.

[0010] Optionally, the trigger frame is also used to trigger the station to transmit the HE TB PPDU. The values ​​of the four SRP fields included in the HE-SIG-A of the HE TB PPDU are each copied from the four UL SRP fields mentioned above. 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] According to the method provided in the first aspect of the present application, on the one hand, since the content of the trigger frame is not changed (specifically, the UL SRP value of the trigger frame is not changed), the HE station can set the spatial reuse parameter in its original manner, the signaling overhead of the trigger frame is not increased, and the HE station does not experience a loss of granularity. On the other hand, if the frame structure of the U-SIG of the EHT TB PPDU is not changed, the spatial reuse parameter within the U-SIG of the EHT TB PPDU is set based on the value indicated by the four UL SRP fields within the trigger frame and one or two fields within the UL EHT SRP field, so that the trigger frame can be used to schedule the EHT station to transmit the uplink EHT TB PPDU, and the HE station and the EHT station can be scheduled using the same trigger frame. Furthermore, the U-SIG reservation field within the U-SIG of the EHT TB PPDU can be set to a default value.

[0012] According to a second aspect, the present application provides a method for determining a spatial reuse parameter field in a PPDU. The method comprises: a station (STA) receives a trigger frame, wherein the trigger frame is used to trigger the station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU).

[0013] The STA transmits an EHT TB PPDU, wherein the value indicated by the SRP in the U-SIG of the EHT TB PPDU is determined based on at least one of the value indicated by the uplink EHT space reuse parameter (UL EHT SRP) in the common information field of the trigger frame and the value indicated by one or more UL SRP fields.

[0014] Optionally, the trigger frame is also used to trigger the station to transmit the HE TB PPDU. The values ​​of the four SRP fields included in the HE-SIG-A of the HE TB PPDU are each copied from the four UL SRP fields mentioned above. 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] According to the method provided in the second aspect of the present application, on the one hand, since the content of the trigger frame is not changed (specifically, the UL SRP value of the trigger frame is not changed), the HE station can set the space reuse parameter in the original manner, the signaling overhead of the trigger frame is not increased, and the HE station does not lose granularity. On the other hand, if the frame structure of the U-SIG of the EHT TB PPDU is not changed, the space reuse parameter within the U-SIG of the EHT TB PPDU is set based on the value indicated by the four UL SRP fields within the trigger frame and one or two fields within the UL EHT SRP field, so that the trigger frame can be used to schedule the EHT station to transmit the uplink EHT TB PPDU, and the HE station and the EHT station can be scheduled using the same trigger frame. Furthermore, the U-SIG reservation field within the U-SIG of the EHT TB PPDU can be set to a default value.

[0016] According to a third aspect, the present application provides a communication device used in a wireless local area network (WLAN). The communication device may be an access point (AP) or a chip within said access point (AP), which comprises:

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

[0018] Transmitter / receiver configured to transmit a trigger frame - The trigger frame is used to trigger the station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU).

[0019] The transceiver is configured to receive an EHT TB PPDU transmitted by the station, wherein the value indicated by the space reuse parameter (SRP) in the universal signal field (U-SIG) of the EHT TB PPDU is determined based on at least one of the value indicated by the uplink EHT space reuse parameter (UL EHT SRP) in the common information of the trigger frame and the value indicated by one or more uplink space reuse parameter (UL SRP) fields.

[0020] The communication device provided in the third aspect can achieve a corresponding technical effect by implementing the method provided in the first aspect. Further details are not described herein.

[0021] According to a fourth aspect, the present application provides a communication device used in a wireless local area network (WLAN), which comprises:

[0022] A transceiver configured to receive a trigger frame—the trigger frame is used to trigger a communication device to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU)—and,

[0023] A processor configured to generate an EHT TB PPDU - the value indicated by the SRP within the U-SIG of the EHT TB PPDU is determined based on at least one of the value indicated by the Uplink EHT Space Reuse Parameter (UL EHT SRP) within the Common Information field of the trigger frame and the value indicated by one or more UL SRP fields - .

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

[0025] The communication device provided in the fourth aspect can achieve a corresponding technical effect by implementing the method provided in the second aspect. Further details are not described herein.

[0026] According to the method provided in the first aspect or the second aspect in the first embodiment, or the communication device provided in the third aspect or the fourth aspect, the common information field of the trigger frame includes four uplink space reuse parameter (UL SRP) fields. The four UL SRP fields are 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 SRP field is equal to the smallest value among the values ​​indicated by the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field. Alternatively, the value of the 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] According to the method provided in the first or second aspect or the communication device provided in the third or fourth aspect in the second embodiment, 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 SRP field is the same as the value indicated by the UL EHT SRP field.

[0028] According to the method provided in the first or second aspect of the third embodiment or the communication device provided in the third or fourth aspect, the common information field of the trigger frame includes four uplink space reuse parameter (UL SRP) fields. The four UL SRP fields are the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the 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 the U-SIG of the EHT TB PPDU includes two SRP fields called the SRP1 field and the SRP2 field. The value of the SRP1 field is the smallest value among the values ​​indicated by the UL SRP1 field and the UL SRP2 field, or either one. The value of the SRP2 field is the smallest value among the values ​​indicated by the UL SRP3 field and the UL SRP4 field, or either one.

[0029] According to the method provided in the first or second aspect or the communication device provided in the third or fourth aspect in the fourth embodiment, the common information field of the trigger frame includes four uplink space reuse parameter (UL SRP) fields. The four UL SRP fields are the UL SRP1 field, UL SRP2 field, UL SRP3 field, and 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 part of a set PPDU, and the U-SIG of the EHT TB PPDU includes two SRP fields called the SRP1 field and the SRP2 field. The value of the SRP1 field is the same as the value of the SRP2 field, and both are equal to the smallest value among the values ​​indicated by the UL SRP1 field, UL SRP2 field, UL SRP3 field, and UL SRP4 field, or any one of them.

[0030] According to the method provided in the first or second aspect or the communication device provided in the third or fourth aspect in the fifth embodiment, the common information field of the trigger frame includes four uplink space reuse parameter (UL SRP) fields. The four UL SRP fields are the UL SRP1 field, UL SRP2 field, UL SRP3 field, and 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 part of a set PPDU, and the U-SIG of the EHT TB PPDU includes two SRP fields called the SRP1 field and the SRP2 field. The value of the SRP1 field is equal to the smallest value among the values ​​indicated by the UL SRP1 field, UL SRP2 field, UL SRP3 field, and UL SRP4 field. The value of the SRP2 field is equal to the value of the UL EHT SRP field.

[0031] According to the method provided in the first or second aspect or the communication device provided in the third or fourth aspect in the sixth embodiment, the universal signal field (U-SIG) of the EHT TB PPDU further includes a U-SIG reserved field, and the value of the U-SIG reserved field is a default value.

[0032] According to the fifth aspect, the present application provides a method for transmitting a trigger frame. The method comprises: an access point (AP) transmits a trigger frame, wherein the trigger frame is used to trigger a station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU), and the trigger frame further comprises a U-SIG reservation indication field indicating the value of the U-SIG reservation field in the EHT TB PPDU.

[0033] The AP receives the EHT TB PPDU transmitted by the station, where the value of the U-SIG reserved field within the Universal Signaling Field (U-SIG) of the EHT TB PPDU is determined based on the value of the U-SIG reserved indication field within the trigger frame.

[0034] Optionally, the trigger frame is also used to trigger the station to transmit the HE TB PPDU. The values ​​of the four SRP fields included in the HE-SIG-A of the HE TB PPDU are each copied from the four UL SRP fields mentioned above. 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] In this solution, the trigger frame is used to schedule the EHT station to transmit the uplink EHT TB PPDU by indicating the value of the U-SIG reservation field in the EHT TB PPDU, and the value of the U-SIG reservation field in the uplink EHT TB PPDU can be set based on the indication of the trigger frame, and the HE station and the EHT station can be scheduled using the same trigger frame.

[0036] According to the sixth aspect, the present application provides a method for determining a spatial reuse parameter field in a physical layer protocol data unit (PPDU). The method comprises: a station (STA) receives a trigger frame, wherein the trigger frame is used to trigger the station to transmit an EHT TB PPDU, and the trigger frame further comprises a U-SIG reservation indication field indicating the value of a U-SIG reservation field in the EHT TB PPDU.

[0037] The STA transmits an EHT TB PPDU, where the value of the U-SIG reservation field within the Universal Signal Field (U-SIG) of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field within the trigger frame.

[0038] Optionally, the trigger frame is also used to trigger the station to transmit the HE TB PPDU. The values ​​of the four SRP fields included in the HE-SIG-A of the HE TB PPDU are each copied from the four UL SRP fields mentioned above. 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] According to the seventh aspect, the present application provides a wireless local area network (WLAN) communication device. The communication device may be an AP or a chip within an AP, for example, a Wi-Fi chip. The communication device comprises the following:

[0040] A processor configured to generate a trigger frame—the trigger frame is used to trigger a station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU), and the trigger frame further includes a U-SIG reservation indicator field indicating the value of the U-SIG reservation field in the EHT TB PPDU—and,

[0041] A transceiver configured to transmit a trigger frame.

[0042] The transceiver is further configured to receive an EHT TB PPDU transmitted by the station, wherein the value of the U-SIG reservation field within the Universal Signal Field (U-SIG) of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field within the trigger frame.

[0043] Optionally, the trigger frame is also used to trigger the station to transmit the HE TB PPDU. The values ​​of the four SRP fields included in the HE-SIG-A of the HE TB PPDU are each copied from the four UL SRP fields mentioned above. 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] According to the eighth aspect, the present application provides a wireless local area network (WLAN) communication device. The communication device may be a STA or a chip within a STA, for example, a Wi-Fi chip. The communication device comprises: a transceiver configured to receive a trigger frame—the trigger frame is used to trigger a station to transmit an EHT TB PPDU, and the trigger frame further comprises a U-SIG reservation indication field indicating the value of the U-SIG reservation field in the EHT TB PPDU—and,

[0045] A processor configured to generate an EHT TB PPDU - the value of the U-SIG reserved field within the Universal Signal Field (U-SIG) of the EHT TB PPDU is determined based on the value of the U-SIG reserved indication field within the trigger frame - .

[0046] The transceiver is further configured to transmit an EHT TB PPDU, and the value of the U-SIG reservation field within the Universal Signal Field (U-SIG) of the EHT TB PPDU is determined based on the value of the U-SIG reservation indication field within the trigger frame.

[0047] Optionally, the trigger frame is also used to trigger the station to transmit the HE TB PPDU. The values ​​of the four SRP fields included in the HE-SIG-A of the HE TB PPDU are each copied from the four UL SRP fields mentioned above. 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] According to the method provided in the fifth or sixth aspect of the first embodiment or the communication device provided in the seventh or eighth aspect, the U-SIG reservation indicator field is located in the special user information field of the user information list field of the trigger frame.

[0049] According to the method provided in the fifth or sixth aspect of the second embodiment or the communication device provided in the seventh or eighth aspect, the association identifier (AID12) of the special user information field is a preset value or an incomplete AID12 value.

[0050] According to the method provided in the fifth or sixth aspect of the third embodiment or the communication device provided in the seventh or eighth aspect, the special user information field may further include one UL SRP field for U-SIG or two UL SRP fields for U-SIG.

[0051] According to the method provided in the fifth or sixth aspect of the fourth embodiment or the communication device provided in the seventh or eighth aspect, the common information field of the trigger frame may include four uplink space reuse parameter (UL SRP) fields. Alternatively, the common information field of the trigger frame may further include an uplink EHT space reuse parameter (UL EHT SRP) field within the reservation field of the common information field.

[0052] According to the ninth aspect, the present application provides a method for indicating space reuse parameters using a trigger frame. The method comprises: an AP transmits a trigger frame, wherein the trigger frame is used to trigger a station to transmit an EHT TB PPDU. The AP receives the EHT TB PPDU transmitted by the station. The trigger frame conveys first indication information, the first indication information indicates the value of the SRP1 field and / or the value of the SRP2 field within the U-SIG of the EHT TB PPDU. The value of the SRP1 field and / or the SRP2 field within the U-SIG of the EHT TB PPDU is determined based on the first indication information.

[0053] According to the tenth aspect, the present application provides a method for determining a space reuse parameter field in a PPDU. The method comprises: an STA receives a trigger frame—the trigger frame is used to trigger the station to transmit an EHT TB PPDU—; the STA transmits an EHT TB PPDU. The STA transmits an EHT TB PPDU. The trigger frame carries first indication information, and the first indication information indicates the value of the SRP1 field and / or the value of the SRP2 field within the U-SIG of the EHT TB PPDU. The value of the SRP1 field and / or the SRP2 field within the U-SIG of the EHT TB PPDU is determined based on the first indication information.

[0054] According to the eleventh aspect, the present application provides a communication device used in a WLAN. The communication device comprises an access point (AP) or a chip of an AP, which comprises the following:

[0055] A processor configured to generate a trigger frame—the trigger frame is used to trigger a station to transmit an EHT TB PPDU—. The AP receives the EHT TB PPDU transmitted by the station. The trigger frame carries first indication information, and the first indication information indicates the value of the SRP1 field and / or the value of the SRP2 field within the U-SIG of the EHT TB PPDU. The value of the SRP1 field and / or the SRP2 field within the U-SIG of the EHT TB PPDU is determined based on the first indication information.

[0056] The communication device further includes a transceiver configured to transmit a trigger frame.

[0057] According to the 12th aspect, the present application provides a communication device used in a WLAN. The communication device comprises a station STA or a chip within the STA, which comprises the following:

[0058] A transceiver configured to receive a trigger frame—the trigger frame is used to trigger the station to transmit an EHT TB PPDU, the trigger frame carries first indication information, the first indication information indicates the values ​​of the SRP1 field and / or SRP2 field within the U-SIG of the EHT TB PPDU—and,

[0059] A processor configured to generate an EHT TB PPDU - the values ​​of the SRP1 field and / or SRP2 field within the U-SIG of the EHT TB PPDU are determined based on the first indication information - .

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

[0061] According to the method provided in the ninth or tenth aspect of the first embodiment or the communication device provided in the eleventh or twelveth aspect, the first display information is located in the common information field of the trigger frame. The common information field includes four UL SRP fields, and each of the four UL SRP fields represents the value of the four SRP fields in the HE TB PPDU.

[0062] According to the method provided in the ninth or tenth aspect of the second embodiment or the communication device provided in the eleventh or twelveth aspect, the first display information is located in the common information field of the trigger frame. The common information field includes a UL EHT SRP field, and the UL EHT SRP field displays the values ​​of the SRP1 field and / or SRP2 field within the U-SIG of the EHT TB PPDU independently of or together with the four UL SRP fields.

[0063] According to the method provided in the ninth or tenth aspect of the third embodiment or the communication device provided in the eleventh or twelveth aspect, the first display information is located in the UL SRP field of the user information field of the trigger frame.

[0064] According to the method provided in the ninth or tenth aspect of the fourth embodiment or the communication device provided in the eleventh or twelveth aspect, a portion of the first display information is located in the four UL SRP fields of the common information field of the trigger frame, and another portion is located in the UL SRP fields of the special user information field of the trigger frame. The four UL SRP fields, together with the UL SRP fields located in the special user information field, display the values ​​of the SRP1 field and / or SRP2 field within the U-SIG of the EHT TB PPDU.

[0065] According to the method provided in the ninth or tenth aspect of the fifth embodiment or the communication device provided in the eleventh or twelveth aspect, a portion of the first display information is located in the common information field of the trigger frame, the common information field includes the UL EHT SRP field, and another portion is located in the UL SRP field of the special user information field of the trigger frame. The UL EHT SRP field displays the values ​​of the SRP1 field and / or SRP2 field within the U-SIG of the EHT TB PPDU together with the UL SRP field located in the special user information field.

[0066] According to the method provided in the ninth or tenth aspect of the sixth embodiment or the communication device provided in the eleventh or twelveth aspect, the first display information is located in a special user information field of the trigger frame.

[0067] According to the method provided in the ninth or tenth aspect of the seventh embodiment or the communication device provided in the eleventh or twelveth aspect, the value of the AID12 field of the special user information field is a preset value or an incomplete AID12 value.

[0068] According to the method provided in the ninth or tenth aspect of the eighth embodiment or the communication device provided in the eleventh or twelveth aspect, the trigger frame is further used to trigger a station to transmit a HETB PPDU. The values ​​of the four SRP fields included in the HE-SIG-A of the HE TB PPDU are each copied from the four UL SRP fields mentioned above. 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] In this solution, a special user information field within the trigger frame independently indicates space reuse parameters for the EHT TB PPDU. The meaning of the special user information field is clear, and the scheduling of the HE station is unaffected. In this way, HE stations and EHT stations can be scheduled using the same trigger frame.

[0070] In any one of the implementations of the aforementioned aspects, the total bandwidth of the EHT TB PPDU is 320 MHz.

[0071] According to the 13th aspect, the present application provides a method for reusing space. The method comprises: a communication device determines the transmission power of an EHT TB PPDU based on one or more of the values ​​individually indicated by the SRP1 and SRP2 fields included in the U-SIG of the EHT TB PPDU, the values ​​individually indicated by four UL SRP fields included in the common information field of the trigger frame, or the values ​​indicated by the UL EHT SRP within the common information field of the trigger frame. The communication device transmits the PPDU based on the transmission power of the PPDU.

[0072] The communication device may be an AP or a STA. If the communication device is an AP, the PPDU is a parameterized spatial reuse reception (PSRR) PPDU. If the communication device is a STA, the PPDU is a response frame that responds to the PSRR PPDU.

[0073] According to the 14th aspect, the present application provides a communication device. The communication device may be an AP or a STA. Additionally, the communication device may be a chip within the AP or STA, for example, a Wi-Fi chip. The communication device comprises: a determination unit configured to determine the transmission power of a PPDU based on values ​​individually indicated by the SRP1 field and SRP2 field included in the U-SIG of the EHT TB PPDU and / or values ​​individually indicated by four UL SRP fields included in the common information field of the trigger frame; and a transceiver unit configured to transmit the PPDU based on the transmission power of the PPDU.

[0074] The communication device may be an AP or a STA. If the communication device is an AP, the PPDU is a PSRR PPDU. If the communication device is a STA, the PPDU is a response frame that responds to the PSRR PPDU.

[0075] According to the communication device provided in aspect 13 or aspect 14 of the first embodiment, prior to the communication device determining the transmission power of the PPDU, the method further comprises: the communication device receives a trigger frame, and the trigger frame contains four UL SRP fields. The value indicated by one UL SRP field is the sum of the transmission power of the first AP of one subchannel and the maximum interference power allowed by the first AP. The communication device and the first AP are located in the same Overlapping Basic Service Set (OBSS). In this invention, "the first AP" is the AP transmitting the trigger frame and is also the AP in the aforementioned method for determining the spatial reuse parameter field in the PPDU. The communication device and the first AP are not the same device.

[0076] In this solution, a method for reusing space for EHT TB PPDU is provided so that one or two SRP fields within U-SIG can be compatible, and space usage is implemented according to the EHT standard. In this way, devices of an overlapping basic service set can perform transmissions simultaneously, thereby improving transmission efficiency.

[0077] According to the 15th aspect, the present application provides an apparatus. The apparatus is implemented in the form of a product of functional units and includes a processing unit and a transceiver unit. The processing unit is configured to implement the function of a processor of any one of the aforementioned aspects, and the transceiver unit is configured to implement the function of a transceiver of any one of the aforementioned aspects.

[0078] According to the 16th aspect, the present application provides a device. The device is implemented in the form of a chip and includes an input / output interface and a processing circuit.

[0079] In a possible design, the device is a chip within a communication device according to the third, seventh, eleventh, or fourteenth aspect. The communication device is an AP. A processing circuit within the chip is configured to implement a processing function performed by the AP side in the third, seventh, eleventh, or fourteenth aspect. In another embodiment, the chip may further include a radio frequency circuit.

[0080] In a possible design, the device is a chip within a communication device according to the fourth, eighth, twelfth, or fourteenth aspect. The communication device is a STA. The processing circuit within the chip is configured to implement a processing function performed by the AP side in the fourth, eighth, eleventh, or fourteenth aspect. In another embodiment, the chip may further include a radio frequency circuit.

[0081] According to the 17th aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores instructions. When the instructions are executed on a computer, the computer performs a method according to the first aspect, the second aspect, the fifth aspect, the sixth aspect, the ninth aspect, the tenth aspect, or the thirteenth aspect.

[0082] According to the 18th aspect, the present application provides a computer program product comprising instructions. When the computer program product is executed on a computer, the computer performs a method according to the first aspect, the second aspect, the fifth aspect, the sixth aspect, the ninth aspect, the tenth aspect, or the thirteenth aspect.

[0083] In an embodiment of the present application, the length of the U-SIG field of the EHT TB PPDU is not changed or increased (the U-SIG field occupies 2 OFDM symbols and is 8 microseconds (μs) in total). The spatial reuse parameter field of the EHT TB PPDU is set based on one or more of the indications of the 4 UL SRP fields within the trigger frame, the indications of the UL EHT SRP fields within the trigger frame, and the indications of the special user information fields within the trigger frame. In this way, HE stations and EHT stations can be scheduled using the same trigger frame, and spatial reuse can be implemented in the EHT standard. Thus, WLAN devices can perform transmissions simultaneously in an overlapping basic service set, thereby improving transmission efficiency. Brief explanation of the drawing

[0084] In order to more clearly explain the technical solution of the embodiments of the present application, the attached drawings used to explain the embodiments are briefly described below. FIG. 1 is a schematic architecture diagram of a wireless communication system according to an embodiment of the present application. FIG. 2a is a schematic diagram of the structure of an access point according to an embodiment of the present application. FIG. 2b is a schematic diagram of the structure of a station according to an embodiment of the present application. Figure 3a is a schematic diagram of an OBSS formed by partially overlapping one BSS and another BSS. FIG. 3b is a schematic diagram of an OBSS formed by one BSS containing another BSS. Figure 4 is a schematic diagram of a trigger-frame-based uplink scheduling transmission method in the 802.11ax standard. Figure 5a is a schematic diagram of the frame format of a trigger frame. Figure 5b is a schematic diagram of the frame format of the common information field and user information field in a trigger frame in 802.11ax. Figure 6a is a schematic diagram of the frame format of the common information field and user information field in the trigger frame in 802.11be. Figure 6b is a schematic diagram of the frame structure of the EHT TB PPDU. FIG. 7a is a first schematic flowchart of a method for displaying a space reuse parameter in a trigger frame and a method for determining a space reuse parameter field in a corresponding PPDU, according to an embodiment of the present application. Figure 7b is a schematic diagram of the relationship between the U-SIG SRP field and the UL SRP field in the method of Figure 7a. FIG. 8a is a second schematic flowchart of a method for displaying a space reuse parameter in a trigger frame and a method for determining a space reuse parameter field in a corresponding PPDU, according to one embodiment of the present application. Figure 8b is a schematic diagram of the relationship between the U-SIG SRP1 field, U-SIG SRP2 field, and UL SRP field in the method of Figure 8a. FIG. 9 is a schematic diagram of a time sequence in which a trigger frame is used to schedule both an HE station and an EHT station for uplink data transmission, according to one embodiment of the present application. Figures 10a and 10b are another schematic diagram of the frame format of the common information field and user information field within the trigger frame in 802.11be. FIG. 11 is a third schematic flowchart of a method for displaying a space reuse parameter in a trigger frame and a method for determining a space reuse parameter field in a PPDU, according to one embodiment of the present application. Figure 12a is a schematic diagram of the relationship between the U-SIG SRP field and the UL EHT SRP field in the method of Figure 11. Figure 12b is a schematic diagram of the relationship between the U-SIG SRP1 field, U-SIG SRP2 field, and UL SRP field in the method of Figure 11. Figure 12c is a schematic diagram of the relationship between the U-SIG SRP1 field, U-SIG SRP2 field, and UL SRP field in the method of Figure 11. FIGS. 13a and 13b are another schematic diagram of the frame format of the common information field and user information field within the trigger frame in 802.11be; FIG. 14 is a schematic flowchart of a trigger frame transmission method and a PPDU transmission method according to an embodiment of the present application. FIG. 15a is a schematic diagram illustrating the SRP within the U-SIG of a trigger frame according to an embodiment of the present application. FIG. 15b is another schematic diagram showing SRP in the U-SIG of a trigger frame according to one embodiment of the present application. FIG. 16 is a schematic flowchart of a space reuse method according to an embodiment of the present application. FIG. 17 is a schematic diagram of the time sequence of a space reuse method according to an embodiment of the present application. FIG. 18 is a schematic flowchart of a space reuse method according to an embodiment of the present application. FIG. 19 is a schematic diagram of the structure of a communication device 1 according to an embodiment of the present application. FIG. 20 is a schematic diagram of the structure of a communication device 2 according to an embodiment of the present application. FIG. 21 is a schematic diagram of the structure of a communication device 3 according to an embodiment of the present application. FIG. 22 is a schematic diagram of the structure of a communication device (1000) according to an embodiment of the present application. Specific details for implementing the invention

[0085] Hereinafter, the technical solution in the embodiment of the present application will be clearly and completely explained with reference to the drawings attached to the embodiment of the present application.

[0086] To facilitate understanding of the method provided in the embodiments of the present application, the system architecture and / or application scenarios of the method provided in the embodiments of the present application are described below. It should be understood that the system architecture and / or application scenarios described in the embodiments of the present application are intended to more clearly explain the technical solution of the embodiments of the present application and are not a limitation on the technical solution provided in the embodiments of the present application.

[0087] This embodiment of the present application provides a method for indicating space reuse parameters in a trigger frame to schedule an EHT station or to schedule both an HE station and an EHT station.

[0088] In an embodiment of the trigger frame of the present example, the common information field of the trigger frame is not changed, and the special user information field within the user information list field portion separately indicates space reuse parameters in the EHT TB PPDU. In another embodiment, some of the fields within the common information field of the trigger frame indicate space reuse parameters in the EHT TB PPDU. Therefore, there is no need to add a special user information field to the user information list field portion. In yet another embodiment, a special user information field is added to the user information list field of the trigger frame to indicate space reuse parameters and U-SIG reservation information in the EHT TB PPDU.

[0089] In both embodiments, in the embodiments of the present application, the length of the U-SIG field of the EHT TB PPDU is not changed or increased (the U-SIG field occupies 2 OFDM symbols and a total of 8 microseconds (μs)). The spatial reuse parameter field of the EHT TB PPDU is set based on one or more of the 4 UL SRP fields within the trigger frame, the UL EHT SRP fields within the trigger frame, or the 4 UL SRP fields and the UL EHT SRP fields. In this way, HE stations and EHT stations can be scheduled using the same trigger frame, and spatial reuse can be implemented in the EHT standard. Thus, WLAN devices can perform transmissions simultaneously in an overlapping basic service set, thereby improving transmission efficiency.

[0090] The method for indicating spatial reuse parameters in a trigger frame and the method for determining spatial reuse parameter fields in a PPDU provided in this embodiment may be applied to a wireless communication system, for example, a wireless local area network system. The method for determining spatial reuse parameter fields in a PPDU may be implemented by a communication device within the wireless communication system or by a chip or processor within the communication device. The communication device may be an access point device or a station device. Alternatively, the communication device may be a wireless communication device that supports simultaneous transmission over multiple links. For example, the communication device may be referred to as a multi-link device (MLD) or a multi-band device. Compared to a communication device that supports only single-link transmission, a multi-link device has higher transmission efficiency and higher throughput.

[0091] The method for indicating spatial reuse parameters in a trigger frame and the method for determining spatial reuse parameter fields in a PPDU provided in the embodiments of the present application may be applied to a scenario in which an AP communicates with one or more STAs, may be applied to a communication scenario in which an AP communicates with another AP, and may be applied to a scenario in which a STA communicates with another STA. FIG. 1 is a schematic diagram of the architecture of a wireless communication system according to an embodiment of the present application. As illustrated in FIG. 1, the wireless communication system may include one or more APs (e.g., AP 1 and AP 2 of FIG. 2) and one or more STAs (e.g., STA 1, STA 2 and STA 3 of FIG. 2). AP 1 and AP 2 may be located in the same OBSS. Both the AP and the STA support WLAN communication protocols. The communication protocol may include 802.11be (or Wi-Fi 7, referred to as the EHT protocol) and may further include protocols such as 802.11ax and 802.11ac. Certainly, the communication protocol may further include the next-generation 802.11be protocol following the continuous evolution and development of communication technology. A WLAN is used as an example. The device implementing the method in this application may be an AP or STA within the WLAN, or a chip or processing system placed in the AP or STA.

[0092] An access point (e.g., AP1 or AP2 in FIG. 1) is a device having wireless communication capabilities that supports communication using WLAN protocols and has the ability to communicate with other devices (e.g., stations or other access points) within a WLAN network, and may certainly have additional capabilities to communicate with other devices. In a WLAN system, the access point may be referred to as an access point station (AP STA). The device having wireless communication capabilities may be the entire device or a chip or processing system installed in the entire device. The device on which the chip or processing system is installed may implement the methods and functions of the embodiments of the present application under the control of the chip or processing system. In the embodiments of the present application, the AP may be a device that provides services to the STA and may support 802.11 series protocols. For example, the AP may be a communication entity, e.g., a communication server, a router, a switch, or a bridge. The AP may include various forms such as a macro base station, a micro base station, a relay station, etc. Clearly, the AP may, in other ways, be a chip or processing system within these devices of various forms and may implement the methods and functions of the embodiments of the present application.

[0093] A station (e.g., STA 1, STA 2, or STA 3 of FIG. 1) is a device having wireless communication capabilities that supports communication using a WLAN protocol and has the ability to communicate with other stations or access points within a WLAN network. In a WLAN system, a station may be referred to as a non-access point station (non-AP STA). For example, a STA is any user communication device that enables a user to communicate with an AP and further communicate with the WLAN. The device having wireless communication capabilities may be the entire device or a chip or processing system installed in the entire device. The device on which the chip or processing system is placed may implement the method and function in the embodiments of the present application under the control of the chip or processing system. For example, the STA may be a user device capable of connecting to the Internet, such as a tablet computer, desktop computer, laptop computer, notebook computer, Ultra-mobile Personal Computer (UMPC), handheld computer, netbook, Personal Digital Assistant (PDA), or mobile phone. Alternatively, the STA may be an Internet of Things node, an in-vehicle communication device within the Vehicle Internet, an entertainment device, a game device or system, a Global Positioning System device, etc. Alternatively, the STA may be a chip and processing system in the aforementioned terminal.

[0094] WLAN systems can provide high-speed and low-latency transmission. With the continuous evolution of WLAN application scenarios, WLAN systems must be applied to more scenarios or industries, such as the Internet of Things (IoT) industry, the automotive industry, the banking industry, corporate offices, stadium exhibition halls, concert halls, hotel rooms, dormitories, wards, classrooms, supermarkets, plazas, streets, production workshops, and warehouses. Certainly, devices supporting WLAN communication (e.g., access points or stations) may include sensor nodes in a smart city (e.g., smart water meters, smart electricity meters, or smart air sensing nodes), smart devices in a smart home (e.g., smart cameras, projectors, displays, televisions, stereos, refrigerators, or washing machines), nodes of the Internet of Things, entertainment terminals (e.g., AR, VR, or other wearable devices), smart devices in a smart office (e.g., printers, projectors, speakers, or stereos), internet devices in vehicles, infrastructure in everyday life scenarios (e.g., vending machines, self-service navigation stations in supermarkets, self-service cash register devices, or self-service ordering machines), devices in large sports and music venues, etc. The specific forms of multilink STAs and multilink APs are not limited to the embodiments of this application and are merely examples for description in this specification.

[0095] The 802.11 standard focuses on the physical layer (PHY) and media access control (MAC) layer portions. For example, refer to FIG. 2a. FIG. 2a is a schematic diagram illustrating the structure of an access point according to an embodiment of the present application. The AP may be multi-antenna / multi-radio frequency or single antenna / single radio frequency. The antenna / radio frequency is used to transmit and receive data packets. In an embodiment, the antenna or radio frequency portion of the AP may be detachable, in other words, detachable from the main body of the AP. In FIG. 2a, the AP may include a physical layer processing circuit and a media access control layer processing circuit. The physical layer processing circuit may be configured to process physical layer signals, and the MAC layer processing circuit may be configured to process MAC layer signals. For another example, refer to FIG. 2b. FIG. 2b is a schematic diagram illustrating the structure of a station according to an embodiment of the present application. FIG. 2b is a schematic diagram showing the structure of a single antenna / single radio frequency STA. In a real-world scenario, the STA may be a multi-antenna / multi-radio frequency device or a device having two or more antennas. The antenna / radio frequency is used to transmit and receive data packets. In an embodiment, the antenna or radio frequency portion of the STA may be separated from the main body of the STA. In FIG. 2b, the STA may include a PHY processing circuit and a MAC processing circuit. The physical layer processing circuit may be configured to process physical layer signals, and the MAC layer processing circuit may be configured to process MAC layer signals.

[0096] The foregoing briefly describes the system architecture in the embodiments of the present application. To better understand the technical solutions in the embodiments of the present application, the following describes the contents related to the embodiments of the present application.

[0097] 1. Nested Basic Service Set (Nested BSS, OBSS)

[0098] Overlapping Basic Service Set: The basic service set and the station's basic service set operate on the same channel, and the basic service set exists (partially or completely) within the basic service area of ​​the station's basic service set. The overlapping basic service area is called the Overlapping Basic Service Set (BSS): a basic service set (BSS) within its basic service area (BSA) that operates on the same channel as the station's (STA's) BSS. The basic service area is an area containing members of the basic service set, which may contain members of another BSS (BSA(Basic Service Area)): an area containing members of another BSS. This may contain members of another BSS.

[0099] In other words, the overlapping portion between the basic service area of ​​one BSS and the basic service area of ​​another BSS is the OBSS. In this document, "overlapping" may mean that the basic service area of ​​one BSS and the basic service area of ​​another BSS partially overlap, or that there is an inclusion relationship; specifically, it can be understood that it means that the basic service area of ​​one BSS enters into the basic service area of ​​another BSS. FIG. 3a is a schematic diagram of an OBSS formed by partially overlapping one BSS and another BSS. In FIG. 3a, AP 1, STA 1, and STA 3 belong to BSS 1, and AP 2 and STA 2 belong to BSS 2. An overlapping area exists between BSS 1 and BSS 2, and AP 1 and AP 2 are located in the overlapping area between BSS 1 and BSS 2, that is, they are located in the OBSS formed by BSS 1 and BSS 2. FIG. 3b is a schematic diagram of an OBSS formed by one BSS containing other BSSs. In FIG. 3b, AP 1, STA 1, and STA3 belong to BSS 1, and AP 2 and STA 2 belong to BSS 2. BSS 1 includes BSS 2, and AP 1 and AP 2 are located in the overlapping area between BSS 1 and BSS 2 (i.e., the primary service area of ​​BSS 2 in FIG. 3b), or in other words, are located in the OBSS formed by BSS 1 and BSS 2.

[0100] Optionally, a WLAN device located in the same OBSS can receive information from two BSSs. For example, FIG. 3a is used as an example. When AP 1 and STA 1 located in the same BSS perform data transmission, AP 2 located in a different BSS may receive information transmitted by AP 1 and STA 1, or AP 2 may additionally receive information transmitted by STA 3. Based on the space reuse parameter provided by AP 1, AP 2 can implement simultaneous transmission in the OBSS by adaptively adjusting the power with which AP 2 transmits PPDU to STA 2. Similarly, when AP 2 and STA 2 within the same BSS perform data transmission, AP 1 within a different BSS may receive information transmitted by AP 2. In contrast, AP 1 can implement simultaneous transmission in OBSS by adaptively adjusting the power with which AP 1 transmits PPDU to STA 1 and / or STA 3 based on the space reuse parameter transmitted by AP 2.

[0101] 2. Trigger frame-based uplink scheduling transmission method of the 802.11ax standard

[0102] FIG. 4 is a schematic diagram of a trigger frame-based uplink scheduling transmission method in the 802.11ax standard. As illustrated in FIG. 4, the trigger-based uplink scheduling transmission method in the 802.11ax standard specifically comprises: (1) an AP transmitting a trigger frame, wherein the trigger frame is used to schedule one or more STAs to transmit an uplink trigger-based HE PPDU. The trigger-based HE PPDU may be abbreviated as HE TB PPDU. FIG. 5a is a schematic diagram of the frame format of a trigger frame. As illustrated in FIG. 5a, the trigger frame includes a common information field and a user information list field. The common information field contains common information that all STAs must read and includes an AP TX Power field and an UL Spatial Reuse field. The user information list field includes one or more user information fields, and one user information field contains information that one STA must read. FIG. 5b is a schematic diagram of the frame format of the common information field and user information field in a trigger frame in 802.11ax. As shown in FIG. 5b, in the user information field, the association identifier (12, AID12) indicates the association identifier of the STA, and the resource unit (RU) allocation (RU allocation) subfield indicates the location of a specific resource unit (STA indicated by AID12) allocated to the STA.

[0103] (2) After receiving a trigger frame, one or more STAs parse the trigger frame to obtain a user information field that matches the STA's AID, and then transmit a HE TB PPDU to the RU indicated by the resource unit allocation subfield within the user information field.

[0104] (3) After receiving the HE TB PPDU, the AP returns an acknowledgment frame to one or more STAs to confirm that the AP has received the HE TB PPDU.

[0105] For example, refer to Table 1 below for the meaning and function of fields that may be included in HE TB PPDU.

[0106] Abbreviations and shorthand Full name item explanation L-STF Legacy Short Training Field Legacy Short Training Field Performs PPDU discovery, schematic synchronization, and automatic gain control. L-LTF Legacy Long Training Field Legacy Long Training Field Perform fine synchronization and channel estimation L-SIG Legacy Signal Field A Legacy signal field By transmitting signal information related to PPDU length, coexistence is guaranteed. HE-SIG-A High Efficient Signal Field A High-efficiency signal field A Transmit signals used to demodulate subsequent data HE-STF High Efficient Short Training Field High-efficiency short training field Perform automatic gain control of the subsequent field HE-LTF High Efficient Long Training Field High-efficiency long training field Estimate the channel Data data Data Information Transmission

[0107] 3. Trigger frame-based uplink scheduling transmission method and the corresponding EHT TB PPDU of the 802.11be standard. The trigger frame-based uplink scheduling transmission method of 802.11ax is still used in 802.11be, and the frame format and method procedure of the trigger frame of 802.11be are similar to those of 802.11ax.

[0108] FIG. 6a is a schematic diagram of the frame format of the common information field and user information field in a trigger frame in 802.11be. The trigger frame illustrated in FIG. 6a can be used to schedule an EHT station to transmit uplink data, for example, to schedule an EHT station to transmit an EHT TB PPDU. It should be understood that FIG. 6a is merely an example. This embodiment of the present application relates to the UL SRP field of the uplink space reuse field of the common information field. Other fields within the trigger frame may differ from those in FIG. 6a, that is, may be expressed in different forms. This is not limited to this embodiment of the present application. For example, the uplink HE-SIG A2 reservation (UL HE-SIG A2 reservation) field included in the common information field portion may also be referred to as the UL U-SIG reservation field. FIG. 6b is a schematic diagram showing the frame structure of an EHT TB PPDU. As illustrated in FIG. 6b, the EHT TB PPDU includes a legacy short training sequence, a legacy long training sequence, a legacy signal field, a repeating legacy signal field, a universal signal field, an ultra-high throughput short training sequence, an ultra-high throughput long training sequence, a data field, and a data packet extension field. Refer to Table 2 below for the meaning of the fields included in the EHT TB PPDU.

[0109] Abbreviations and shorthand Full name item explanation L-STF Legacy Short Training Field Legacy Short Training Field Performs PPDU discovery, schematic synchronization, and automatic gain control. L-LTF Legacy long Training Field Legacy Long Training Field Perform fine synchronization and channel estimation L-SIG Legacy Signal Field A Legacy signal field A By transmitting signal information related to PPDU length, coexistence is guaranteed. RL-SIG Repeated Legacy Signal Field Repeated legacy signal field Identical to L-SIG. Used in conjunction with L-SIG to enhance reliability for automatic detection. U-SIG Universal SIG Universal signal field Similar to HE-SIG-A, the difference is that an integrated signal field is used in EHT PPDU and subsequent standards; therefore, this field is called the universal signal field. EHT-STF Extremely High Throughput Short Training Field Ultra-high throughput short training field Perform automatic gain control of the subsequent field EHT-LTF Extremely High Throughput Long Training Field Ultra-high throughput long training field Estimate the channel Data data Data Information Transmission PE Packet Extension Packet extension To increase the processing time of the receiver

[0110] For example, the contents of the U-SIG field in the EHT TB PPDU are shown in Table 3.

[0111] Meaning of the U-SIG field in EHT TB PPDU Field Category subfield Number of bits U-SIG (Physical layer) Version independent Version identifier 3 PPDU Bandwidth 3 UL / DL (Uplink / Downlink) 1 BSS color (Basic Service Set color) 6 TXOP (Transmission Opportunity) 7 Reserved 2 TBD 1 Undetermined 1 (Reserved) 4 (Physical layer) version dependency PPDU format and EHT-SIG compression PPDU format and EHT-SIG compression indication 2 Reserved 1 Space Reuse 1 4 Space Reuse 2 4 TBD 2 Undetermined 2 (Reserved) 5 CRC & Tail (Cyclic Redundancy Check and Tail Bit) U-SIG's CRC (Cyclic Redundancy Check) 4 U-SIG's Tail (Tail Beat) 6 Total bits of U-SIG # (Total number of bits of U-SIG) 52

[0112] From the structure and content of the U-SIG of the EHT TB PPDU in Figure 6b and Table 3, it can be seen that due to length limitations, the U-SIG of the EHT TB PPDU contains up to two SRP fields, for example, a space reuse 1 field and a space reuse 2 field, and the length of each SRP field is 4 bits. The common information field of the trigger frame carries four UL SRP fields, and the HE-SIG-A field of the HE TB PPDU also contains four SRP fields that correspond one-to-one with the four UL SRP fields within the trigger frame. Therefore, in a scenario where the trigger frame is used to schedule an EHT station to transmit an uplink EHT TB PPDU, the SRP fields within the EHT TB PPDU cannot be set according to the method of setting the SRP fields in the HE TB PPDU. Therefore, a method to set the trigger frame to indicate the SRP field in the EHT TB PPDU and set the SRP field in the EHT TB PPDU when the STA transmits the EHT TB PPDU so that HE stations and EHT stations are scheduled using the same trigger frame to provide feedback on spatial reuse parameters is an urgent task to be solved. Embodiments of the present application provide a method for indicating spatial reuse parameters in a trigger frame and a method for determining the spatial reuse parameter field in a PPDU. For different bandwidths, without changing the frame structure of the EHT TB PPDU, the trigger frame is designed and the spatial reuse parameters in the EHT TB PPDU are set so that HE stations and EHT stations can be scheduled using the same trigger frame, and spatial reuse can be implemented in the EHT standard. In this way, WLAN devices of an overlapping basic service set can perform transmissions simultaneously, thereby improving transmission efficiency.

[0113] Hereinafter, the technical solution provided in this application will be described in detail with reference to more attached drawings.

[0114] The technical solutions provided in this application are illustrated using Examples 1 through 5. Example 1 describes a method for setting space reuse parameters in EHT TB PPDUs with different bandwidths (20 / 40 / 80 / 160 / 320 MHz) without modifying 802.11ax. Example 2 describes a method for displaying space reuse parameters in an EHT TB PPDU by implementing the function of an uplink EHT space reuse field (the HE-SIG-A2 reservation field and the reservation field are collectively referred to as the reservation field) using a reservation field in the common information field of a trigger frame. Example 3 describes a method for displaying space reuse parameters in an EHT TB PPDU using a reservation field in the common information field and the user information list field within the trigger frame. Example 4 describes a space reuse method based on space reuse parameters in 802.11be. It will be understood that new embodiments can be formed by any combination of the technical solutions described in Examples 1 through 4 of this application.

[0115] It may be understood that in this application, AP and STA may be single-link devices or functional entities or functional units within multi-link devices. For example, in this application, AP is an AP within an AP multi-link device, and STA is a STA within a station multi-link device. This is not limited in this application.

[0116] It will be understood that the method provided in this application is described by way of example using a communication system comprising one or more APs and one or more STAs. The AP supports the 802.11be protocol (or Wi-Fi 7, referred to as the EHT protocol) and may additionally support other WLAN communication protocols, such as 802.11ax and 802.11ac. At least one of the one or more STAs supports the 802.11be protocol; in other words, at least one EHT station exists. It should be understood that the AP and STA in this application may further support the next-generation 802.11be protocol. In other words, the method provided in this application is applicable not only to the 802.11be protocol but also to the next-generation 802.11be protocol.

[0117] Example 1

[0118] Example 1 of the present application describes setting a space reuse parameter in an EHT TB PPDU of 20 / 40 / 80 / 160 / 320 MHz bandwidth without changing the trigger frame (or without changing the content of the trigger frame).

[0119] In Example 1, the trigger frame is shown in FIG. 5b.

[0120] FIG. 7a is a first schematic flowchart of a method for displaying a spatial reuse parameter in a trigger frame and a method for determining a spatial reuse parameter field in a corresponding PPDU according to one embodiment of the present application. As illustrated in FIG. 7a, the method comprises the following steps, but is not limited thereto.

[0121] S101: AP transmits a trigger frame, wherein the trigger frame is used to trigger a station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU).

[0122] S102: STA receives a trigger frame.

[0123] S103: The STA transmits an EHT TB PPDU, wherein the Universal Signal Field (U-SIG) of the EHT TB PPDU contains only one Space Reuse Parameter (SRP) field, and the SRP field indicates the space reuse parameter of the entire bandwidth. The value indicated by the SRP field is determined based on the value indicated by one or more Uplink Space Reuse Parameter (UL SRP) fields within the Common Information field of the trigger frame.

[0124] In an embodiment, as shown in FIG. 7b, the value indicated by the SRP1 field is equal to the smallest value among the four space reuse fields indicated by the four uplink space reuse parameter (UL SRP) fields, which can be expressed as SRP=min{UL SRP1, UL SRP2, UL SRP3, UL SRP4}.

[0125] In another embodiment, the value indicated by the SRP1 field is the same as any of the four space reuse fields indicated by the four uplink space reuse parameter (UL SRP) fields, which can be expressed as SRP1 being the same as UL SRP1, UL SRP2, UL SRP3, or UL SRP4.

[0126] S104: The AP receives the EHT TB PPDU transmitted by the station.

[0127] FIG. 8a is a second schematic flowchart of a method for indicating a spatial reuse parameter in a trigger frame and a method for determining a spatial reuse parameter field in a corresponding PPDU, according to one embodiment of the present application. As illustrated in FIG. 8a, the method comprises the following steps, but is not limited thereto.

[0128] S201: The AP transmits a trigger frame, which is used to trigger a station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU). Refer to FIG. 6a for the structure and configuration of the trigger frame.

[0129] S202: STA receives a trigger frame.

[0130] S203: The STA transmits an EHT TB PPDU, wherein the Universal Signal Field (U-SIG) of the EHT TB PPDU contains two spatial reuse parameters, the SRP1 field and the SRP2 field, representing a spatial reuse parameter corresponding to a low frequency of half of the total bandwidth and a spatial reuse parameter corresponding to a high frequency of half of the total bandwidth, respectively. The values ​​indicated by the spatial reuse parameter (SRP) 1 field and the SRP 2 field are each 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.

[0131] In the embodiment, the SRP 1 field and the SRP 2 field each indicate the SRP value of a different subchannel, and the SRP value is equal to the sum of the transmission power of the AP of the corresponding subchannel and the maximum interference power that the AP can allow. It should be understood that the SRP1 field and the SRP2 field within the U-SIG of the EHT TB PPDU may have other names, such as, for example, the PSR1 field and the PSR2 field. This is not limited to this embodiment of the present application.

[0132] In an embodiment, as shown in FIG. 8b, when the bandwidth of the EHT TB PPDU is 20 / 40 / 80 / 160 MHz and the EHT TB PPDU is a non-aggregated PPDU, the value of the SRP 1 field in the U-SIG is equal to the smallest value among the UL SR1 field and the UL SR2 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame, which can be expressed as SRP1=min{UL SRP1, UL SRP2}.

[0133] The value of the SRP2 field in U-SIG may be equal to the smallest value among the UL SR3 field and the UL SR4 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame, which can be expressed as SRP2=min{SRP3, UL SRP4}.

[0134] In an implementation example, as shown in FIG. 8b, when the EHT bandwidth is 320 MHz or the TB PPDU is a set PPDU, the value of the SRP1 field in the U-SIG is the same as the value of the SRP2 field, and both the SRP1 field and the SRP2 field are the same as the smallest value among the four space reuse fields indicated by the uplink space reuse field in the trigger frame, and SRP1=SRP2=min{UL SRP1, UL SRP2, UL SRP3, UL SRP4}.

[0135] S204: The AP receives the EHT TB PPDU transmitted by the station.

[0136] Optionally, in the process of the method of indicating space reuse parameters in the trigger frame illustrated in FIG. 7a and FIG. 8a, the trigger frame may be used not only to trigger an EHT station to transmit an EHT TB PPDU, but also to trigger an HE station to transmit an HE TB PPDU. Alternatively, the trigger frame may be used only to trigger an EHT station to transmit an EHT TB PPDU, or only to trigger an HE station to transmit an HE TB PPDU. Although this embodiment of the present application focuses on the case where the trigger frame is used to trigger an EHT station to transmit an EHT TB PPDU, it is not limited to the case where the trigger frame is used only to trigger an EHT station to transmit an EHT TB PPDU, and may include the case where the trigger frame is used simultaneously to trigger an EHT station to transmit an EHT TB PPDU and to trigger an EHT station / HE station to transmit an HE TB PPDU. It can be understood that while HE stations can only transmit HE TB PPDUs, EHT stations may be compatible with the 802.11ax protocol. Therefore, EHT stations can transmit both HE TB PPDUs and EHT TB PPDUs.

[0137] FIG. 9 is a schematic diagram of a time sequence in which a trigger frame is used to schedule both an HE station and an EHT station for uplink data transmission according to one embodiment of the present application. As shown in FIG. 9, an AP transmits a trigger frame, and the trigger frame is used to simultaneously schedule an HE station (e.g., STA 1 in FIG. 9) and an EHT station (e.g., STA 2 in FIG. 9) to perform uplink data transmission. After STA 1 and STA 2 receive the trigger frame, STA 1 transmits an HE TB PPDU, and STA 2 transmits an EHT TB PPDU after a certain time (e.g., a short interframe space). After receiving the uplink multi-user PPDU, the AP returns a Multiple STA Block Acknowledgement (M-BA) frame after a certain time (e.g., a short interframe space) to confirm that the AP has received the PPDU transmitted by one or more stations. The trigger frame illustrated in FIG. 9 can be used only to schedule EHT stations, in other words, both STA 1 and STA 2 in FIG. 9 are EHT stations. The trigger frame illustrated in FIG. 9 can be used only to schedule stations to transmit EHT TB PPDUs, in other words, both STA 1 and STA 2 in FIG. 9 are EHT TB PPDUs.

[0138] Specifically, the trigger frame may be transmitted via broadcast. After the AP transmits the trigger frame, one or more stations may receive the trigger frame. If the trigger frame is used simultaneously to schedule an EHT station to transmit an EHT TB PPDU and to schedule it to transmit an HE TB PPDU, the EHT station may transmit the EHT TB PPDU by setting the values ​​indicated by the SRP1 and SRP2 fields in the U-SIG of the EHT TB PPDU based on the values ​​indicated by one or more UL SRP fields in the common information field of the received trigger frame. In other words, the EHT station may alternatively set the values ​​indicated by the SRP1 and SRP2 fields in the U-SIG of the EHT TB PPDU based on the values ​​indicated by one or more UL SRP fields in the common information field of the received trigger frame. The HE station can copy the values ​​of the four UL SRP fields in the received trigger frame one by one into the four SRP fields in the HE TB PPDU, and then transmit the HT TB PPDU.

[0139] Optionally, the correspondence between the value and meaning of the UL SRP field or SRP field in this application may be represented as shown in Table 4 below. The Uplink Space Reuse Parameter (UL SRP) field may also be referred to as the Uplink Parameter Space Reuse (UL PSR) field. In this application, UL SRP and UL PSR may be used interchangeably, that is, SRP and PSR may be used interchangeably. The value of the Uplink Space Reuse Parameter is determined by the AP and can be understood as equal to the sum of the AP's transmission power and the maximum interference power that the AP can allow.

[0140] Value of the UL SRP / SRP field explanation 0 SRP_Disallow (parameterized space reuse is not allowed) 1 SRP = -80 dBm 2 SRP = -74 dBm 3 SRP = -68 dBm 4 SRP = -62 dBm 5 SRP = -56 dBm 6 SRP = -50 dBm 7 SRP = -47 dBm 8 SRP = -44 dBm 9 SRP = -41 dBm 10 SRP = -38 dBm 11 SRP = -35 dBm 12 SRP = -32 dBm 13 SRP = -29 dBm 14 SRP ≥-26 dBm 15 SRP_AND_NON_SRG_OBSS_PD_PROHIBITED (SRP and non-SR group OBSS packet detection is prohibited)

[0141] In this application, it can be understood that the value indicated by the UL SRP field may be any value in the second column of Table 4, and the value of the UL SRP field may be any value in the first column of Table 4.

[0142] Example 2

[0143] Example 2 of the present application mainly describes a method for setting a trigger frame to adapt to the SRP field of U-SIG (in other words, a method for changing the content of the trigger frame) and a method for setting space reuse parameters in the trigger-based PPDU (HE TB PPDU and EHT TB PPDU) after the content of the trigger frame has been changed.

[0144] In actual application, it will be understood that Example 2 of the present application may be implemented with reference to some of the examples in Example 1, or may be implemented separately. This is not limited to this example of the present application.

[0145] In Example 2, the HE-SIG-A2 reservation field of the trigger frame shown in FIG. 5b or FIG. 6a is used to indicate space reuse parameters in the EHT TB PPDU, or additional reservation fields are used.

[0146] Specifically, as illustrated in FIGS. 10a and 10b, a reservation field within the common information field of a trigger frame (the reservation field includes the HE-SIG-A2 reservation field and the reservation field) may be used to set the uplink EHT PPDU bandwidth subfield, the HE / EHT subfield indicating the EHT STA to transmit the EHT TB PPDU or HE TB PPDU, and the uplink EHT space reuse field. Optionally, a special user presence indication subfield may be further included. The uplink EHT space reuse field is used separately to indicate space reuse parameters in the EHT TB PPDU, or in conjunction with the uplink space reuse field to indicate space reuse parameters in the EHT TB PPDU. In other words, the value of the SRP field in the U-SIG of the EHT TB PPDU depends on at least one of the uplink EHT space reuse field and the uplink space reuse field.

[0147] The HE-SIG-A2 reservation field and the trigger frame reservation field of Figures 10a and 10b are shown in Table 5.

[0148] Uplink HE-SIG-A2 reservation field and / or reservation field subfield bit explanation Uplink EHT PPDU Bandwidth (Extension) Field 2 or 3 Indicates the uplink HE bandwidth and uplink EHT bandwidth (2 bits) together with the UL(HE) BW field, or indicates the uplink EHT PPDU bandwidth (3 bits) separately. Uplink EHT Spatial Reuse (Parameters), Spatial Reuse Parameters - SRP 0 or 4 Indicates the value of the SRP field of the U-SIG portion of the EHT TB PPDU, together with or separately from the Uplink Space Reuse field. Indicate presence of special users 0 or 1 You can explicitly indicate whether there is a special user information field, or indirectly indicate it based on whether there is a special AID.

[0149] It should be understood that the uplink HE-SIG-A2 reservation field and / or the reservation field may include some or all of the subfields. Additionally, it should be understood that the subfields in Table 5 may have different names. This is not limited in this application. The number of bits occupied by each subfield is exemplary. This is not limited in this embodiment of the application. The meaning of the uplink EHT PPDU bandwidth field in Table 5 when the uplink EHT PPDU bandwidth field individually indicates the uplink EHT PPDU bandwidth is shown in Table 6.

[0150] The Uplink EHT PPDU Bandwidth field individually indicates the Uplink EHT PPDU Bandwidth. Uplink EHT PPDU Bandwidth Field explanation 000 20 MHz 001 40 MHz 010 80 MHz 011 160 MHz 100 320 MHz 101 reservation 110 reservation 111 reservation

[0151] It should be understood that the correspondence between the value of the uplink EHT PPDU bandwidth field and the meaning of this value is for illustrative purposes only. In this embodiment of the present application, there may be other correspondences. For example, 100 may represent 320 MHz-1 and 101 may represent 320 MHz-2, and 320 MHz-1 and 320 MHz-2 represent two types of 320 MHz channel divisions, respectively: 320 MHz-1 with channel center frequencies of 31 / 95 / 159 and 320 MHz-2 with channel center frequencies of 63 / 127 / 191. Note that current standards introduce two reserved markings. One is a validate reserved bit / entry, and if the receiver does not understand the marking of the field, the frame is discarded. The other is a disregard reserved bit / entry, and if the receiver does not understand the marking of the field, this field is discarded and the other field continues to be interpreted. For the uplink EHT PPDU bandwidth field, the reserved entry must be a verified reserved entry. In other words, if a non-EHT receiver does not understand the indication of the field, the frame is discarded.

[0152] Hereinafter, with reference to the trigger frames illustrated in FIGS. 10a and 10b, a method for displaying space reuse parameters in a trigger frame and a method for determining space reuse parameter fields in a PPDU will be described.

[0153] FIG. 11 is a third schematic flowchart of a method for displaying a spatial reuse parameter in a trigger frame and a corresponding method for determining a spatial reuse parameter field in a PPDU, according to one embodiment of the present application. As illustrated in FIG. 11, the method for displaying a spatial reuse parameter in a trigger frame and the corresponding method for determining a spatial reuse parameter field in a PPDU include, but are not limited to, the following steps.

[0154] S301: The AP transmits a trigger frame, wherein the trigger frame is used to trigger a station to transmit an EHT TB PPDU, the uplink space reuse field of the common information field of the trigger frame includes four UL SRP fields, and the UL HE-SIG-A2 reservation field and / or reservation field of the trigger frame is used as an EHT space reuse parameter. In an embodiment, as illustrated in FIGS. 10a and 10b, the UL HE-SIG-A2 reservation field and / or reservation field includes an uplink EHT PPDU bandwidth subfield, an HE / EHT subfield, an uplink EHT space reuse field, and a special user presence indication field.

[0155] S302: STA receives a trigger frame.

[0156] S303: STA transmits an EHT TB PPDU, wherein the U-SIG of the EHT TB PPDU may include one SRP field or two SRP fields.

[0157] In an exemplary embodiment, as illustrated in FIG. 12a, the U-SIG includes only one SRP field and indicates the spatial reuse parameter of the entire bandwidth. In this case, the value of the SRP field is the same as the value of the uplink EHT spatial reuse field.

[0158] In another embodiment, as illustrated in FIG. 12b, U-SIG includes two SRP fields denoted as U-SIG SRP1 and U-SIG SRP2, representing a low-frequency space reuse parameter for half of the total bandwidth and a high-frequency space reuse parameter for half of the total bandwidth, respectively. The value of the SRP1 field is indicated by the uplink space reuse field within the trigger frame. For example, the U-SIG SRP1 field may be equal to the smallest value or any value among the four space reuse fields indicated by the space reuse field. The value of the U-SIG SRP2 field is indicated by the uplink EHT space reuse field within the trigger frame.

[0159] In another embodiment, as shown in FIG. 12c, U-SIG includes two SRP fields denoted as U-SIG SRP1 and U-SIG SRP2.

[0160] When the bandwidth is 20 / 40 / 80 / 160 MHz and the TB PPDU is a non-aggregated PPDU, the uplink space reuse field indicates only two SRP fields. The value of the U-SIG SRP1 field may be equal to the smallest value among the UL SRP1 and UL SR2 fields of the four space reuse fields indicated by the space reuse field, or either one thereof. The value of the U-SIG SRP2 field may be equal to the smallest value among the UL SRP3 and UL SR4 fields of the four space reuse fields indicated by the space reuse field, or either one thereof. In this case, the uplink EHT space reuse field is reserved or does not exist.

[0161] When the bandwidth is 320 MHz and the TB PPDU is a set PPDU, the uplink space reuse field indicates only the SRP1 field of the two SRPs. The value of the U-SIG SRP1 field is equal to the smallest value of the four space reuse fields indicated by the space reuse field, and the value of the U-SIG SRP2 field is equal to the value indicated by the uplink EHT space reuse field.

[0162] S304: The AP receives the EHT TB PPDU transmitted by the station.

[0163] In one embodiment, the trigger frame is used not only to trigger an EHT station to transmit an EHT TB PPDU, but also to trigger an HE station to transmit an HE TB PPDU. Alternatively, the trigger frame is used only to trigger an EHT station to transmit an EHT TB PPDU, or only to trigger an HE station to transmit an HE TB PPDU. Although this embodiment of the present application focuses on the case where the trigger frame is used to trigger an EHT station to transmit an EHT TB PPDU, it is not limited to the case where the trigger frame is used to trigger an EHT station to transmit an EHT TB PPDU, and may include the case where the trigger frame is used simultaneously to trigger an EHT station to transmit an EHT TB PPDU and to trigger an EHT station / HE station to transmit an HE TB PPDU.

[0164] In an embodiment, the U-SIG of the EHT TB PPDU may include only one SRP field, e.g., the SRP1 field; or it may include two SRP fields, the SRP1 field and the SRP2 field. The SRP1 field and the SRP2 field each indicate the SRP value of a different subchannel, and the SRP value is equal to the sum of the transmission power of the AP of the corresponding subchannel and the maximum interference power that the AP can allow. It should be understood that the SRP1 field and the SRP2 field within the U-SIG of the EHT TB PPDU may have other names, such as the PSR1 field and the PSR2 field, e.g., the PSR1 field and the PSR2 field. This is not limited to this embodiment of the application.

[0165] The uplink space reuse field within the common information field of the trigger frame still includes four UL SRP fields: namely, the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field. The uplink EHT space reuse field within the common information field of the trigger frame is represented by the UL EHT SRP. The space reuse field within the U-SIG of the EHT TB PPDU is represented by SRP1 and SRP2.

[0166] In actual application, when Example 2 of the present application is implemented with reference to Example 1, at bandwidths of 20 / 40 / 80 / 160 / 320 MHz, the settings of the UL SRP1 to UL SRP4 fields within the trigger frame and the settings of the SRP1 and SRP2 fields within the U-SIG of the EHT TB PPDU can be summarized as shown in Table 7. In Table 7, " / " indicates an "or" relationship.

[0167] situation Trigger Frame U-SIG 1 ULSRP1, ULSRP2, UL SRP3, and UL SRP4, UL EHT, and no SRP SRP1= min{ULSRP1, ULSRP2, ULSRP3, ULSRP4} or SRP1= ULSRP1 / ULSRP2 / ULSRP3 / ULSRP4 2 ULSRP1, ULSRP2, UL SRP3, and UL SRP4, UL EHT, and no SRP The EHT bandwidth is 20 / 40 / 80 / 160 MHz and the TB PPDU is a non-set TB PPDU, SRP1 = min{UL SRP1, UL SRP2} or SRP1 = UL SRP1 / UL SRP2; SRP2 = min{UL SRP3, UL SRP4} or SRP2 = UL SRP3 / UL SRP4. The EHT bandwidth is 320 MHz or the TB PPDU is a set TB PPDU, SRP1 = SRP2 = min{UL SRP1, UL SRP2, UL SRP3, UL SRP4} or SRP1 = SRP2 = UL SRP1 / UL SRP2 / UL SRP3 / UL SRP4 3 UL EHT SRP SRP1 = UL EHT SRP 4 UL SRP1, UL SRP2,UL SRP3, and UL SRP4;UL EHT SRP SRP1 = min{UL SRP1, UL SRP2, UL SRP3, UL SRP4} or SRP1 = UL SRP1 / UL SRP2 / UL SRP3 / UL SRP4;SRP2 = UL EHT SRP 5 UL SRP1, UL SRP2,UL SRP3, and UL SRP4;UL EHT SRP The EHT bandwidth is 20 / 40 / 80 / 160 MHz, the EHT TB PPDU is a non-set EHT TB PPDU, and the UL EHT SRP is reserved or non-existent SRP1 = min{UL SRP1, UL SRP2}, or SRP1 = UL SRP1 / UL SRP2; SRP2 = min{UL SRP3, UL SRP4}, or SRP2 = UL SRP3 / UL SRP4. The EHT bandwidth is 320 MHz, or the EHT TB PPDU is a non-set EHT TB PPDU SRP1 = min{ULSRP1, ULSRP2, ULSRP3, ULSRP4}, or SRP1 = ULSRP1 / ULSRP2 / ULSRP3 / ULSRP4. SRP2 = UL EHT SRP

[0168] It should be understood that in the aggregate PPDU scenario, the bandwidth of the HE TB PPDU and EHT TB PPDU is 160 MHz each, or the bandwidth of the HETB PPDU is 80 MHz and the bandwidth of the EHT TB PPDU is 160 MHz, or 320 MHz with 80 MHz punctured. In the aggregate PPDU scenario, it should be understood that the setting of the space reuse parameter in the HE-SIG-A of the HE TB PPDU follows the prior art. Further details are not described herein.

[0169] In this embodiment of the present application, it can be seen that the value of the uplink space reuse field (UL SRP) within the trigger frame is used as the UL EHT space reuse field for setting the SRP field of the U-SIG, or that the HE-SIG-A2 reservation field and / or reservation field within the trigger frame is used. The space reuse field within the U-SIG of the EHT TB PPDU is set so that the trigger frame can be used to schedule the EHT station to transmit the uplink EHT TB PPDU, and the HE station and the EHT station can be scheduled using the same trigger frame.

[0170] Example 3

[0171] Example 3 of the present application primarily describes a technical solution in which a trigger frame transmits a special user information field to separately indicate space reuse parameters and U-SIG reservation fields for an EHT TB PPDU, and a method for setting space reuse parameters and U-SIG reservation fields of an EHT TB PPDU when the trigger frame does not transmit the special user information field.

[0172] It will be understood that in actual application, Embodiment 3 of the present application may be implemented by setting the SRP1 field and SRP2 field within the U-SIG to bandwidths of 20 MHz, 40 MHz, 80 MHz, and 160 MHz with reference to the aforementioned Embodiment 1 or Embodiment 2. Alternatively, Embodiment 3 of the present application may be implemented separately. This is not limited to this embodiment of the present application.

[0173] Refer to FIGS. 13a and FIGS. 13b. In the trigger frame illustrated in FIGS. 13a and FIGS. 13b, the common information field of the trigger frame may include four UL SRP fields, namely the UL SRP1 field, the UL SRP2 field, the UL SRP3 field, and the UL SRP4 field. Each of the four UL SRP fields may indicate the value of the four SRP fields within the HE TB PPDU.

[0174] The user information list field of the trigger frame includes multiple user information fields, one of which is a special user information field and is represented as user information (STA 1).

[0175] In an exemplary embodiment, the special user information field may include a UL SRP field and a U-SIG reservation indicator field. The UL SRP field indicates the values ​​of the SRP1 and SRP2 fields within the U-SIG of the EHT TB PPDU, or the UL SRP field of the special user information field indicates the value of the SRP2 field within the U-SIG of the EHT TB PPDU. The U-SIG reservation indicator field indicates the value of the U-SIG reservation field within the U-SIG of the EHT TB PPDU.

[0176] In another embodiment, the special user information field may not include the UL SRP field but may include a U-SIG reservation indicator field. The values ​​of the SRP1 field and / or SRP2 field within U-SIG of the EHT TB PPDU are indicated by the UL SRP1 field, UL SRP2 field, UL SRP3 field and UL SRP4 field within the common information field of the trigger frame, or by the UL EHT SRP field of HE-SIG-A2 within the common information field. The U-SIG reservation indicator field indicates the values ​​of the U-SIG reservation field within U-SIG of the EHT TB PPDU.

[0177] In an exemplary implementation, the value of the association identifier (AID) 12 field of the special user information field is a preset value. The preset value may be any one of 2008 to 2044 or 2046 to 4095, for example, the preset value is 2044. Alternatively, the preset value may be an AID of 1 to 2007 that is not assigned to any associated STA.

[0178] In another implementation, the special user information field does not need to convey the full value of AID12. Only the most significant bit needs to be set to 1, and any of the subsequent 11 bits can be fixed to 0 so that this value can be distinguished from existing values ​​already used in AID12. The remaining 10 bits can be used for information transmission.

[0179] In the 802.11ax standard, the trigger frame carries a 9-bit UL HE-SIG-A2 reserved field. However, until the 802.11ax standard was formalized, the HE-SIG-A2 reserved bits were not redefined, resulting in 9 bits being wasted. For the 802.11be standard, as illustrated in Fig. 9, in addition to SRP1 and SRP4, the U-SIG portion of the EHT TB PPDU includes an additional U-SIG reserved field, meaning 12 bits are reserved. The values ​​of the 12 reserved bits must be indicated by the trigger frame. This is why the trigger frame requires an uplink U-SIG reserved indicator field to be conveyed by the special user information field. If the bits corresponding to the U-SIG reserved field within the U-SIG of the EHT TB PPDU use a default value, this value does not need to be indicated by the trigger frame. Instead, if necessary, the uplink U-SIG reserved indicator field of the special user information field within the trigger frame indicates a specific value. In this way, the bit overhead of the trigger frame is reduced. In releases after 802.11be, if the indication of the trigger frame is not required, the trigger frame does not need to pass the special user information fields of 802.11be.

[0180] It should be understood that the special user information field may not exist in Release 1 (R1) released in 802.11be. However, devices supporting R1 must be able to read the special user information field. If the special user information field exists, the default value cannot be used, and the value indicated by the special user field must be used. This prevents a situation where the AP or third-party station fails to properly receive the U-SIG due to mutual interference caused by the different contents of the U-SIG when R1-supporting devices and R2-supporting devices jointly transmit the U-SIG.

[0181] In conclusion, the existence of special user information fields and the meaning of their existence are shown in Table 8.

[0182] Meaning of special user information fields subfield bit explanation Physical layer version field 3 If the trigger frame is a trigger frame of the EHT standard, or if the trigger frame contains a special user field, it indicates that it is a standard of a specific later generation. If the trigger frame does not contain a special user field, when the STA transmits the EHT TB PPDU, U-SIG displays a default value (e.g., 000) indicating the EHT standard. Uplink Universal Signal Reservation Indicator Field (ULU-SIG Reservation) 12 or 16 If the trigger frame includes a special user field, the value of the U-SIG reserved field within the U-SIG of the EHT TB PPDU transmitted by the STA is indicated. The value of the U-SIG reserved field is copied from the value of this field. If the trigger frame does not include a special user field, when the STA transmits the EHT TB PPDU, the value of the reserved field within the U-SIG is a default value, e.g., a value of all 1s, a value of all 0s, or a value of alternating 1s and 0s. This is not limited to the solution of the present application.

[0183] Note that if U-SIG has only one SRP field, the reserved field is 16 bits. If U-SIG has two SRP fields, the reserved field is 12 bits. Some of the values ​​of the U-SIG reserved field in the EHT TB PPDU are indicated by special user fields within the trigger frame, and some of the values ​​are indicated by the uplink HE-SIG-A2 reserved field and / or reserved field. If the meaning of some reserved fields needs to be modified in a subsequent standard, the reserved values ​​corresponding to the HE-SIG-A2 reserved field and / or reserved field may be modified first. In this way, there is no need to transmit special user fields, thereby reducing the bit overhead of the trigger frame.

[0184] It should be understood that at least one of the uplink universal signal reservation indicator field and the physical layer version field included in the special user information field shown in Table 8 may exist. Additionally, it should be understood that the subfields of Table 8 may have different names. This is not limited in this application. The number of bits occupied by each subfield and corresponding to each subfield is merely an example. In this embodiment of the application, another number of bits may be set for the subfields.

[0185] FIG. 14 is a schematic flowchart of a trigger frame transmission method and a corresponding PPDU transmission method according to an embodiment of the present application. As illustrated in FIG. 14, the trigger frame transmission method and the corresponding PPDU transmission method include the following steps, but are not limited thereto.

[0186] S401: AP transmits a trigger frame, the trigger frame is used to trigger a station to transmit an EHT TB PPDU, the trigger frame further transmits second indication information, the second indication information indicates the value of the U-SIG reservation field within the U-SIG of the EHT TB PPDU.

[0187] The trigger frame further transmits first indication information, and the first indication information displays the value of the SRP1 field and / or the value of the SRP2 field within the U-SIG of the EHT TB PPDU.

[0188] S402: STA receives a trigger frame.

[0189] S403: STA transmits an EHT TB PPDU, wherein the value of the U-SIG reservation field within the U-SIG of the EHT TB PPDU is a default value or is determined based on second indication information. The value of the SRP1 field and / or SRP2 field within the U-SIG of the EHT TB PPDU is determined based on first indication information.

[0190] S404: The AP receives the EHT TB PPDU transmitted by the station.

[0191] Optionally, the trigger frame is used not only to trigger an EHT station to transmit an EHT TB PPDU, but also to trigger an HE station to transmit an HE TB PPDU. Alternatively, the trigger frame is used only to trigger an EHT station to transmit an EHT TB PPDU, or only to trigger an HE station to transmit an HE TB PPDU. Although this embodiment of the application focuses on the case where the trigger frame is used to trigger an EHT station to transmit an EHT TB PPDU, it is not limited to the case where the trigger frame is used only to trigger an EHT station to transmit an EHT TB PPDU, and may include the case where the trigger frame is used simultaneously to trigger an EHT station to transmit an EHT TB PPDU and to trigger an EHT station / HE station to transmit an HE TB PPDU.

[0192] Optionally, the U-SIG of the EHT TB PPDU contains only two SRP (Spatial Reuse Parameter) fields, namely the SRP1 field and the SRP2 field. The SRP1 field and the SRP2 field each indicate the SRP value of a different subchannel, and the SRP value is equal to the sum of the transmission power of the AP of the corresponding subchannel and the maximum interference power that the AP can allow. It should be understood that the SRP1 field and the SRP2 field within the U-SIG of the EHT TB PPDU may have other names, such as, for example, the PSR1 field and the PSR2 field. This is not limited to this embodiment of the application.

[0193] The trigger frame transmits first display information, and the first display information may display the values ​​of the SRP1 field and SRP2 field within the U-SIG of the EHT TB PPDU, or the first display information may display the value of the SRP2 field within the U-SIG of the EHT TB PPDU.

[0194] In an embodiment, the first indication information may be located within the uplink space reuse field of the common information field of the trigger frame. Refer to the description of Example 1 for the method of setting the value of the SRP field within U-SIG during the process of the STA transmitting the EHT TB PPDU. Further details are not described herein. In this embodiment, the trigger frame does not include the second indication information. Therefore, the U-SIG reservation field within the U-SIG portion of the EHT TB PPDU is set to a default value. Alternatively, the trigger frame includes the second indication information, and the second indication information is located in the special user information field. Therefore, the U-SIG reservation field within the U-SIG portion of the EHT TB PPDU is set to the value indicated by the second indication information.

[0195] In another embodiment, part of the first indication information is located in the uplink space reuse field of the common information field of the trigger frame, and part is located in the uplink EHT space reuse field of the common information field of the trigger frame. Alternatively, the first indication information may be entirely located within the uplink EHT space reuse field within the common information field of the trigger frame. Refer to the description of Example 2 for how the STA sets the value of the SRP field within U-SIG during the process of transmitting the EHT TB PPDU. Further details are not described herein. In this embodiment, the trigger frame does not include the second indication information. Therefore, the U-SIG reservation field within the U-SIG portion of the EHT TB PPDU is set to a default value. Alternatively, the trigger frame includes the second indication information, and the second indication information is located in the special user information field. Therefore, the U-SIG reservation field within the U-SIG portion of the EHT TB PPDU is set to the value indicated by the second indication information.

[0196] In another embodiment, both the first display information and the second display information may be located in the user information field of the trigger frame, and the user information field is a special user information field.

[0197] In one embodiment, the special user information field mentioned above does not need to convey the full value of AID12. Only the most significant bit needs to be set to 1, and any of the subsequent 11 bits can be fixed to 0 so that this value can be distinguished from existing values ​​already used in AID12. The remaining 10 bits can be used for information transmission. In another embodiment, the value of the association identifier (AID) 12 field of the special user information field is a preset value. The preset value may be any one of 2007, 2008 to 2044, or 2046 to 4095, for example, the preset value is 2044. Additionally, the second display information is also located in the special user information field.

[0198] In the case of an EHT station, if the AID12 field within the user information field in the trigger frame is set to a special value (e.g., AID12=2044 or 2207) or an unassigned AID, or if the AID12 field is set to an incomplete AID12 value, the EHT station can identify that the user information field is being used to set the SRP field in the U-SIG and U-SIG reserved fields. In other words, the special user information field conveys first indication information representing the value of the SRP1 field and / or SRP2 field within the U-SIG. The special user information field further conveys second indication information representing the value of the U-SIG reserved field within the U-SIG. The HE station does not parse the user information field in the trigger frame where the AID12 field is set to a special value, or the HE station must understand that it receives a user information field where the AID12 field is set to a special value indicating that the field is irrelevant to the HE station. In other words, the first indication information added to the trigger frame does not affect the behavior of the HE station.

[0199] When the first indication information represents the values ​​of the SRP1 and SRP2 fields within the U-SIG, the 8 bits following the AID12 field within the user information field are used to convey the first indication information. The first 4 bits of the 8 bits represent the value of the SRP1 field within the U-SIG, and the last 4 bits of the 8 bits represent the value of the SRP2 field. It should be understood that the 8 bits can be represented as the first field and the second field. The first field is the first 4 bits of the 8 bits, and the second field is the last 4 bits of the 8 bits. That is, the first field following the AID12 field represents the value of the SRP1 field within the U-SIG, and the second field following the AID12 field represents the value of the SRP2 field within the U-SIG. Additionally, it should also be understood that the first field can be referred to as the UL SRP1 field for the U-SIG, and the second field can be referred to as the UL SRP2 field for the U-SIG. The first field and the second field may have different names. This is not limited to this embodiment of the application.

[0200] After receiving a trigger frame, the EHT station sets the value of the SRP1 field within the U-SIG of the EHT TB PPDU to be transmitted to the value of the first field within the user information field of the trigger frame, and sets the value of the SRP2 field within the U-SIG to the value of the second field within the user information field of the trigger frame. The first field and the second field within the user information field of the trigger frame each correspond to a 160 MHz bandwidth. For example, the first field corresponds to the first 160 MHz bandwidth in ascending order of frequency, and the second field corresponds to the second 160 MHz bandwidth in ascending order of frequency. In other words, the SRP1 field within the U-SIG corresponds to the first 160 MHz bandwidth in ascending order of frequency, and the SRP2 field within the U-SIG corresponds to the second 160 MHz bandwidth in ascending order of frequency.

[0201] FIG. 15a is a schematic diagram illustrating the SRP within the U-SIG of a trigger frame according to an embodiment of the present application. As shown in FIG. 15a, the user information field of the trigger frame may include an AID12 field, a UL SRP1 field for U-SIG, a UL SRP2 field for U-SIG, a 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 may be adjacent to the AID12 field or may not be adjacent to the AID12 field. The UL SRP1 field for U-SIG displays the value of the SRP1 field within the U-SIG, and the UL SRP2 field for U-SIG displays the value of the SRP2 field within the U-SIG. 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 allow. 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 allow. The UL U-SIG reservation indicator field indicates the value of the U-SIG reservation field of U-SIG when the STA transmits the EHT TB PPDU.

[0202] If the first indication information represents only the value of the SRP2 field within the U-SIG, the 4 bits following the AID12 field within the user information field are used to convey the first indication information. In other words, the 4 bits represent the value of the SRP2 field within the U-SIG. The 4 bits may be referred to as the UL SRP2 field for the U-SIG, and the 4 bits may have other names. This is not limited to this embodiment of the application. Optionally, if the first indication information represents only the value of the SRP2 field within the U-SIG, 4 reserved bits within the common information field of the trigger frame, for example, the HE-SIG-A2 reserved field or 4 reserved bits within the reserved field, may be used to convey the first indication information. In other words, the 4 reserved bits represent the value of the SRP2 field within the U-SIG. The common information field of the trigger frame includes 4 UL SRP fields. After receiving a trigger frame, the EHT station sets the value of the SRP1 field within the U-SIG of the transmitting target's EHT TB PPDU to the smallest value among the four UL SRP field values ​​included in the common information field of the trigger frame, i.e., SRP1 = min(UL SRP1, UL SRP2, UL SRP3, UL SRP4), and sets the value of the SRP2 field within the U-SIG to the value of the UL SRP2 field for the U-SIG within the special user information field of the trigger frame. The SRP1 field within the U-SIG corresponds to the first 160 MHz bandwidth in ascending order of frequency, and the SRP2 field within the U-SIG corresponds to the second 160 MHz bandwidth in ascending order of frequency. The EHT station further sets the value of the U-SIG reservation field within the U-SIG of the transmitted EHT TB PPDU to the value of the UL U-SIG reservation indication field within the special user information field of the trigger frame.

[0203] FIG. 15b is another schematic diagram showing SRPs in the U-SIG of a trigger frame according to one embodiment of the present application. As illustrated in FIG. 15b, in one embodiment, the common information field of the trigger frame includes four UL SRP fields, and the four UL SRP fields each indicate the SRP values ​​of four 40 MHz subchannels in ascending order of frequencies on the primary 160 MHz channel. Alternatively, in another embodiment, the HE-SIG-A2 reservation field and / or reservation field of the common information field of the trigger frame is used as a UL EHT SRP field to indicate the SRP values ​​of the primary 160 MHz channel. The special user information field of the trigger frame may include an AID12 field, a UL SRP2 field for the 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 may or may not be adjacent to the AID12 field. The UL SRP2 field for U-SIG indicates the value of the SRP2 field within U-SIG. 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 allow, or is equal to the SRP value of the secondary 160 MHz channel.

[0204] After receiving a trigger frame, the EHT station sets the value of the SRP1 field within the U-SIG of the transmitting target's EHT TB PPDU to the smallest value among the four UL SRP field values ​​included in the common information field of the trigger frame, i.e., SRP1 = min(UL SRP1, UL SRP2, UL SRP3, UL SRP4), and sets the value of the SRP2 field within the U-SIG to the value of the UL SRP2 field for the U-SIG within the special user information field of the trigger frame. The SRP1 field within the U-SIG corresponds to the first 160 MHz bandwidth in ascending order of frequency, and the SRP2 field within the U-SIG corresponds to the second 160 MHz bandwidth in ascending order of frequency. The EHT station further sets the value of the U-SIG reservation field within the U-SIG of the transmitted EHT TB PPDU to the value of the UL U-SIG reservation indication field within the special user information field of the trigger frame.

[0205] It should be understood that this embodiment of the present application focuses primarily on the method of setting the SRP1 and SRP2 fields within the U-SIG and the method of setting the U-SIG reserved field within the U-SIG to a bandwidth of 320 MHz. For the method of setting the SRP1 and SRP2 fields within the U-SIG to a bandwidth of 160 MHz or less, refer to the relevant description in Example 1 or Example 2. Further details are not described herein.

[0206] In this embodiment of the present application, for a 320 MHz bandwidth, it can be seen that the special user information field within the trigger frame independently indicates the space reuse parameter and the U-SIG reservation field for the EHT TB PPDU. The meaning of the special user information field is clear, and the scheduling of the HE station is not affected. In this way, the HE station and the EHT station can be scheduled using the same trigger frame. If the trigger frame does not include the aforementioned special user information field, the space reuse parameter of the U-SIG of the EHT TB PPDU can be set based on the indication of the uplink space reuse field and / or the uplink EHT space reuse field within the trigger frame, and the U-SIG reservation field can be set to a default value.

[0207] In conclusion, the relationship between the U-SIG and the trigger frame within the EHT TB PPDU in Examples 1 to 3 of the present application can be summarized as shown in Table 9.

[0208] Field Category subfield Number of bits Relationship from / with trigger frame Special user information field does not exist Special user information fields exist U-SIG (Physical layer) Version independent Version identifier 3 Display default value (e.g., 000) Value (3 bits) displayed by the version identifier field in the special user information field PPDU Bandwidth 3 Value indicated by the Uplink (HE) Bandwidth field (2 bits) within the Common Information field in Table 5 + Value indicated by the Uplink HE PPDU Bandwidth field (2 bits) (2+2 bits); or Value indicated by the Uplink EHT PPDU Bandwidth field (3 bits) in Table 6 UL / DL (Uplink / Downlink) 1 Same as 802.11ax BSS Color (Basic Service Set Color) 6 Same as 802.11ax TXOP (Transmission Opportunity) 7 Same as 802.11ax Reserved 2 default value Values ​​displayed by special user information fields TBD 1 Specific 1 (Reservation) 4 default value Values ​​displayed by special user information fields (Physical layer) version dependency PPDU format and EHT-SIG compression PPDU format and EHT-SIG compression indication 2 Same as 802.11ax Reserved 1 Default value (e.g., 0) Values ​​displayed by special user information fields Spatial Reuse 1 4 Values ​​displayed by the uplink space reuse field in the common information field and / or values ​​displayed by the uplink EHT space reuse field in the common information field (see Table 7) Spatial Reuse 2 4 Values ​​displayed by the uplink space reuse field in the common information field and / or values ​​displayed by the uplink EHT space reuse field in the common information field (see Table 7) or reservation default value The value displayed by the Uplink U-SIG reservation display field within the special user information field TBD 2 Specific 2 (Reservation) 5 default value The value displayed by the Uplink U-SIG reservation display field within the special user information field CRC & Tail (Cyclic Redundancy Check and Tail Bit) CRC in U-SIG (Circular Redundancy Check) 4 Same as 802.11ax Tail in U-SIG (Tail Beat) 6 Same as 802.11ax Total # of Bits in U-SIG (Total number of bits in U-SIG) 52

[0209] It should be understood that the subfields included in U-SIG in Table 9 are merely examples, and that some subfields may be included in addition. It should also be understood that the subfields in Table 9 may have different names. This is not limited in this application. The number of bits occupied by each subfield may be adjusted based on actual circumstances. This is not limited in this application. Example 4

[0210] The aforementioned Examples 1 to 3 describe methods for setting the SRP field and the U-SIG reservation field when one or more stations transmit an EHT TB PPDU in different scenarios. Example 4 of the present application describes a space reuse method based primarily on space reuse parameters in 802.11be.

[0211] In actual application, it will be seen that Example 4 of the present application may be implemented with reference to Examples 1 to 3, or may be implemented separately. This is not limited to this example of the present application.

[0212] In this embodiment of the present application, it can be understood that the first AP and the first STA belong to the same BSS, which is denoted as BSS 1. The second AP and the second STA belong to a different BSS, which is denoted as BSS 2. The first AP and the second AP are located in the OBSS formed by BSS 1 and BSS 2. Accordingly, in order to reduce interference caused by the energy generated when the second AP transmits a parameterized spatial reuse transmission (PSRT) PPDU, the transmission power used when the second AP transmits the PSRT PPDU must be limited so that the first AP can receive the EHT TB PPDU.

[0213] Optionally, in this embodiment of the present application, the second AP can receive information transmitted by the first AP and the first STA.

[0214] FIG. 16 is a schematic flowchart of a space reuse method according to an embodiment of the present application. As illustrated in FIG. 16, the space reuse method includes the following steps, but is not limited thereto.

[0215] S501: The first AP transmits a parameterized spatial reuse reception (PSRR) PPDU containing a trigger frame, wherein the trigger frame is used to schedule the first STA to transmit an EHT TB PPDU. In response, the first STA receives the trigger frame.

[0216] It is understood that a PSRR PPDU may contain additional information other than the trigger frame. However, this embodiment of the present application focuses on the trigger frame portion of the PSRR PPDU. Therefore, other information contained in the PSRR PPDU is not described in this embodiment of the present application.

[0217] Specifically, a PSRR PPDU containing a trigger frame is used to schedule a station to perform uplink data transmission, for example, to transmit an uplink EHT TB PPDU. As illustrated in FIG. 6a or FIG. 10, the common information field of the trigger frame includes an uplink spatial reuse (UL Spatial Reuse) field. The uplink spatial reuse field may include four uplink spatial reuse parameter (UL SRP) fields of 4 bits in length, which represent the sum of the AP's transmit power and the maximum interference power that the AP can allow. The four UL SRP fields included in the uplink spatial reuse field are the UL SRP1 field, UL SRP2 field, UL SRP3 field, and UL SRP4 field. For an implementation of the four UL SRP fields of different bandwidths, refer to any one of Examples 1 through 3. Further details are not described herein.

[0218] S502: The first STA transmits an EHT TB PPDU. In response, the first AP receives the EHT TB PPDU transmitted by the station.

[0219] In this embodiment of the present application, "first AP" is the "AP" described in Examples 1 to 3, and in this embodiment of the present application, "first STA" is the "STA" described in Examples 1 to 3.

[0220] Specifically, regarding the embodiment of step S502 in this embodiment of the present application, reference is made to the embodiment of step S103 in Example 1. Further details are not described herein. Alternatively, regarding the embodiment of step S502 in this embodiment of the present application, reference is made to the embodiment of step S203 in Example 2. Further details are not described herein. Alternatively, regarding the embodiment of step S502 in this embodiment of the present application, reference is made to the embodiment of step S303 in Example 3. Further details are not described herein.

[0221] S503: The second AP determines the transmission power of the parameterized spatial reuse transmission (PSRT) PPDU based on the values ​​individually indicated by the SRP1 and SRP2 fields included in the U-SIG of the EHT TB PPDU and / or the values ​​separately indicated by the four UL SRP fields included in the common information field of the trigger frame.

[0222] S504: The second AP transmits the PSRT PPDU based on the transmission power of the PSRT PPDU. In response, the second STA receives the PSRT PPDU.

[0223] Specifically, the first AP and the second AP are located in the OBSS formed by BSS 1 and BSS 2. Accordingly, the second AP can also receive the trigger frame transmitted by the first AP. Thus, after the first AP transmits a PSRR PPDU containing the trigger frame, the second AP receives the PSRR PPDU containing the trigger frame. The trigger frame includes four 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 allowed by the first AP. The second AP can also receive an EHT TB PPDU transmitted by the first STA, and 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 allowed by the first AP. The value indicated by the SRP2 field is the sum of the transmission power of the first AP on the second subchannel and the maximum interference power allowed by the first AP. The bandwidth value of the first subchannel and the bandwidth value of the second subchannel are equal to half the bandwidth of the EHT TB PPDU, and the frequency of the first subchannel is smaller than the frequency of the second subchannel.

[0224] After the second AP receives the PSRR PPDU and the EHT TB PPDU (i.e., determines that the first STA has transmitted the EHT TB PPDU), the second AP calculates the transmission power used to transmit the PSRT PPDU based on the power at which the PSRR PPDU is received (i.e., the received power level, the received power level (RPL)), the values ​​separately indicated by the SRP1 and SRP2 fields included in the U-SIG, and / or the values ​​individually indicated by the four UL SRP fields. The second AP transmits the PSRT PPDU based on the calculated transmission power. In response, the second STA receives the PSRT PPDU and responds to the second AP with a response frame in response to the PSRT PPDU.

[0225] FIG. 17 is a schematic diagram of the time sequence of a space reuse method according to an embodiment of the present application. It is assumed that AP 1 and AP 2 are located in the same OBSS, AP 1 and STA 1 belong to BSS 1, and AP 2 and STA 2 belong to BSS 2. As shown in FIG. 14, AP 1 (i.e., the aforementioned first AP) transmits a PSRR PPDU containing a trigger frame. STA 1 (i.e., the aforementioned first STA), having received the PSRR PPDU, transmits an uplink EHT TB PPDU after a certain time (e.g., a short inter-frame space) based on the indication of the trigger frame. Since AP 1 and AP 2 are located in the same OBSS, AP 2 can receive the PSRR PPDU transmitted by AP 1 and the EHT TB PPDU transmitted by STA. After AP 2 (i.e., the second AP) receives the PSRR PPDU and the EHT TB PPDU, AP 2 calculates the power used by AP 2 to transmit the PSRT PPDU based on the power at which the PSRR PPDU is received (i.e., RPL) and the two SRP values ​​and / or four UL SRP values ​​within the EHT TB PPDU. After detecting that the EHT TB PPDU is being transmitted, AP 2 transmits the PSRT PPDU based on the calculated power. After receiving the PSRT PPDU, STA 2 (i.e., the second STA) transmits a block acknowledgment frame at a time interval (e.g., a short inter-frame space) to confirm that STA 2 has received the PSRT PPDU.

[0226] Optionally, the transmission power of the PSRT PPDU obtained by the second AP through calculation satisfies the following equation.

[0227] PPDU transmission power (used by the second AP to transmit PSRT PPDU) - log10(PSRT PPDU bandwidth / 20MHz) ≤ SRP - RPL(1-1)

[0228] In Equation (1-1), log10(PSRT PPDU bandwidth / 20 MHz) represents the bandwidth normalization factor. In Equation (1-1), SRP is the SRP value on the subchannel. In Equation (1-1), RPL is the combined transmission power at all receiving antenna connectors across the PSRR PPDU bandwidth during the non-HE portion of the triggering PPDU or the non-HE PPDU portion (PPDU containing the trigger frame) (RPL is the combined transmission power at all receiving antenna connectors across the PSRR PPDU bandwidth during the non-HE portion of the triggering PPDU's HE PPDU preamble, and is the average of all antennas used to receive the PPDU). Bandwidth normalization was performed on the SRP and PRL values ​​of Equation (1-1). Since the value indicated by the UL SRP field is equal to the sum of the transmission power of the AP (here, the first AP) and the maximum interference power allowed by the AP (here, the first AP), it should be understood that the maximum interference power allowed by the AP (here, the first AP) is determined by the value of SRP.

[0229] Optionally, the second AP may obtain the RPL using the PSRR PPDU, and obtain the SRP using the U-SIG of the EHT TB PPDU without obtaining the UL SRP from the PSRR PPDU. Specifically, the second AP calculates the transmission power used to transmit the PSRT PPDU based on the power received by the PSRR PPDU (i.e., RPL) and the values ​​separately indicated by the SRP1 and SRP2 fields included in the U-SIG. Alternatively, the second AP may obtain both the RPL and the UL SRP using the PSRR PPDU, but does not obtain the SRP within the U-SIG after determining that the EHT TB PPDU has been received. Specifically, the second AP calculates the transmission power used to transmit the PSRT PPDU based on the power received by the PSRR PPDU (i.e., RPL) and the values ​​separately indicated by the four UL SRP fields.

[0230] Optionally, the above-mentioned equation (1-1) may be equivalent to the following equation (1-2):

[0231] Normalized transmission power of 2nd AP ≤ Transmission power of 1st AP + Maximum interference power allowed by 1st AP - Power at which 2nd AP receives PSRR PPDU transmitted by 1st AP (1-2)

[0232] The right side of Equation (1-2), that is, the value obtained by subtracting the power of the second AP receiving the PSRR PPDU transmitted by the first AP from the transmission power of the first AP, is equal to the path loss between the first AP and the second AP.

[0233] Therefore, Equation (1-2) can alternatively be equivalent to Equation (1-3):

[0234] Normalized transmission power of 2nd AP ≤ Maximum interference power allowed by 1st AP + Path loss between 1st AP and 2nd AP (1-3)

[0235] Equation (1-3) can alternatively be equivalent to the following Equation (1-4):

[0236] Normalized transmission power of the second AP - path loss between the first AP and the second AP ≤ maximum interference power allowed by the first AP (1-4)

[0237] Since the left side of Equation (1-4), i.e., the value obtained by subtracting the path loss between the first AP and the second AP from the normalized transmission power of the second AP, represents the interference caused to the first AP by the second AP, Equation (1-4) can be equivalent to the following Equation (1-5):

[0238] Interference caused by the second AP to the first AP ≤ Maximum interference power allowed by the first AP (1-5)

[0239] This embodiment of the present application provides a method for spatial reuse of EHT TB PPDUs, which can be seen in that two SRP fields in U-SIG are compatible and spatial reuse is implemented in the EHT standard. In this way, devices of an overlapping basic service set can perform transmissions simultaneously, thereby improving transmission efficiency.

[0240] In an optional embodiment, the space reuse method provided in this application may also be applied to a second STA. FIG. 18 is a schematic flowchart of a space reuse method according to an embodiment of this application. It can be understood that in this embodiment of the application, the first AP and the first STA belong to the same BSS, which is denoted as BSS 1. The second AP and the second STA belong to a different BSS, which is denoted as BSS 2. The first AP and the second STA are located in the OBSS formed by BSS 1 and BSS 2. Accordingly, in order to reduce interference caused by the energy generated when the second STA transmits the response frame of the PSRT PPDU, the transmission power used when the second STA transmits the response frame needs to be limited so that the first AP receives the EHT TB PPDU.

[0241] Optionally, in this embodiment of the present application, the second STA can receive information transmitted by the first AP and the first STA.

[0242] As illustrated in FIG. 18, the space reuse method includes the following steps, but is not limited thereto.

[0243] S601: The first AP transmits a parameterized space reuse reception PSRR PPDU containing a trigger frame, wherein the trigger frame is used to schedule the first STA to transmit an EHT TB PPDU. In response, the first STA receives the trigger frame.

[0244] S602: The first STA transmits an EHT TB PPDU. In response, the first AP receives the EHT TB PPDU transmitted by the station.

[0245] Specifically, regarding the implementation of steps S601 and S602 in this embodiment of the present application, reference is made to the implementation of steps S501 and S502 in the embodiment illustrated in FIG. 16. Further details are not described herein.

[0246] S603: The second AP transmits a PSRT PPDU. In response, the second STA receives the PSRT PPDU.

[0247] S604: The second STA determines the transmission power of a response frame responding to a PSRT PPDU based on one or more of the values ​​individually indicated by the SRP1 and SRP2 fields included in the U-SIG of the EHT TB PPDU, the values ​​individually indicated by the four UL SRP fields included in the common information field of the trigger frame, and the values ​​indicated by the UL EHT SRP field.

[0248] S605: The second STA transmits a response frame based on the transmission power of the response frame.

[0249] Specifically, regarding the implementation of steps S604 and S605 in this embodiment of the present application, reference is made to the implementation of steps S503 and S504 in the embodiment illustrated in FIG. 16. Further details are not described herein. It should be understood that the transmission power of the response frame responding to the PSRT PPDU in step S604 corresponds to the transmission power of the PSRT PPDU in step S503. Regarding the method for determining the transmission power of the response frame in step S604, reference is made to the method for determining the transmission power of the PSRT PPDU in step S503. Further details are not described herein.

[0250] Optionally, the second AP may be located in the OBSS formed by BSS 1 and BSS 2. Accordingly, in order to reduce interference caused by the energy generated when the second STA transmits the response frame of the PSRT PPDU and the energy generated when the second AP transmits the PSRT PPDU, for the first AP to receive the EHT TB PPDU, both the transmission power used when the second STA transmits the response frame and the transmission power used when the second AP transmits the PSRT PPDU need to be limited. Accordingly, when the first AP, the second STA, and the second AP are all located in the OBSS formed by BSS 1 and BSS 2, before the second AP transmits the PSRT PPDU (i.e., prior to step S603), the second AP determines the transmission power of the response frame based on one or more of the values ​​individually indicated by the SRP1 and SRP2 fields included in the U-SIG of the EHT TB PPDU, the values ​​individually indicated by the four UL SRP fields included in the common information field of the trigger frame, and the values ​​indicated by the UL EHT SRP field. At this time, step S603 specifically: transmits the PSRT PPDU based on the transmission power of the PSRT PPDU.

[0251] This embodiment of the present application provides a method for spatial reuse of EHT TB PPDUs, so that one or two SRP fields in U-SIG can be compatible and spatial use is implemented in the EHT standard. In this way, devices of an overlapping basic service set can perform transmissions simultaneously, thereby improving transmission efficiency.

[0252] The foregoing describes in detail the method provided in this application. To facilitate the implementation of the above-described solution of the embodiments of this application, the embodiments of this application further provide a corresponding device or apparatus.

[0253] In this embodiment of the present application, the AP and STA may be divided into functional modules based on the example of the method described above. For example, functional modules may be obtained through division based on corresponding functions, or two or more functions may be integrated into a single processing module. The integrated module may be implemented in the form of hardware or in the form of a software functional module. Note that in the embodiment of the present application, module division is merely a logical functional division as an example. In actual implementations, other division methods may be used. Hereinafter, a communication device in the embodiment of the present application will be described in detail with reference to FIGS. 19 through 22. The communication device is an access point or a station. Additionally, the communication device may be a device within the AP, or the communication device may be a device within the STA.

[0254] When an integrated unit is used, FIG. 19 is a schematic diagram showing the structure of a communication device (1) according to an embodiment of the present application. The communication device (1) may be an AP or a chip within the AP, for example, a Wi-Fi chip. As shown in FIG. 19, the communication device (1) includes a transceiver unit (11) and a processing unit (12).

[0255] In the first design, the processing unit (12) is configured to generate a trigger frame, and the trigger frame is used to trigger the station to transmit an EHT TB PPDU. The transceiver unit (11) is further configured to receive the EHT TB PPDU transmitted by the station. The values ​​indicated by the Space Reuse Parameter (SRP) 1 field and SRP 2 field within the Universal Signal Field (U-SIG) of the EHT TB PPDU are each determined based on the values ​​indicated by one or more Uplink Space Reuse Parameter (UL SRP) fields within the Common Information Field of the trigger frame. Specifically, refer to the description of the EHT TB PPDU in step S103 of the aforementioned Example 1. Further details are not described herein.

[0256] In the second design, the processing unit (12) is configured to generate a trigger frame, and the transceiver unit (11) is configured to transmit the trigger frame. The trigger frame is used to trigger a station to transmit an EHT TB PPDU. The common information field of the trigger frame includes four UL SRP fields, and the HE-SIG A2 reservation field and the reservation field of the common information field are used as indications for UL EHT space reuse parameters and include UL EHT SRP fields.

[0257] The transceiver unit (11) is further configured to receive an EHT TB PPDU transmitted by the station, wherein the U-SIG of the EHT TB PPDU includes two SRP fields called the SRP1 field and the SRP2 field.

[0258] When the bandwidth of the EHT TB PPDU is 20 / 40 / 80 / 160 MHz and the EHT TB PPDU is a non-aggregated PPDU, the value of the SRP 1 field in the U-SIG is equal to the smallest value among the UL SR1 field and the UL SR2 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame, which can be expressed as SRP1=min{UL SRP1, UL SRP2}.

[0259] The value of the SRP2 field in U-SIG may be equal to the smallest value among the UL SR3 field and the UL SR4 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame, which can be expressed as SRP2=min{SRP3, UL SRP4}.

[0260] In an implementation example, as shown in FIG. 8b, when the EHT bandwidth is 320 MHz or the TB PPDU is a set PPDU, the value of the SRP1 field in the U-SIG is the same as the value of the SRP2 field, and both the SRP1 field and the SRP2 field are the same as the smallest value among the four space reuse fields indicated by the uplink space reuse field in the trigger frame, and SRP1=SRP2=min{UL SRP1, UL SRP2, UL SRP3, UL SRP4}.

[0261] Specifically, refer to the description of the EHT TB PPDU or the set PPDU in step S203 of the aforementioned Example 1. Further details are not described herein.

[0262] The communication device (1) in the first design and the communication device (1) in the second design can correspondingly perform Example 1, and it should be understood that the aforementioned operation or function of the unit in the communication device (1) is separately configured to implement the corresponding operation of the AP in Example 1. For brevity, details are not described again here.

[0263] In the third design, the processing unit (12) is configured to generate a trigger frame, and the transceiver unit (11) is configured to transmit the trigger frame. The HE-SIG-A2 reservation field and the reservation field within the common information field of the trigger frame may be used to set the uplink EHT PPDU bandwidth subfield, the HE / EHT subfield, and the uplink EHT space reuse field. The uplink EHT space reuse field is used to separately indicate space reuse parameters in the EHT TB PPDU, or together with the uplink space reuse field to indicate space reuse parameters in the EHT TB PPDU. Specifically, refer to the description of the trigger frame in step S301 of the aforementioned Example 2. Further details are not described herein.

[0264] The transceiver unit (11) is also configured to receive an EHT TB PPDU or a collection PPDU transmitted by a station, wherein the U-SIG of the EHT TB PPDU may include one SRP field or two SRP fields. Specifically, refer to the description of the EHT TB PPDU or collection PPDU in step S303 of Example 2. Further details are not described herein.

[0265] The communication device (1) in the third design may correspondingly perform Example 2, and it should be understood that the aforementioned operation or function of the unit in the communication device (1) is separately configured to implement the corresponding operation of the AP in Example 2. For brevity, details are not described again here.

[0266] In the fourth design, the processing unit (12) is configured to generate a trigger frame. The transceiver unit (11) is configured to transmit the trigger frame, and the trigger frame is used to trigger a station to transmit an EHT TB PPDU, and the trigger frame carries first indication information, the first indication information indicates the value of the SRP1 field and / or SRP2 field within the U-SIG of the EHT TB PPDU. Optionally, the trigger frame further carries second indication information, the second indication information indicates the value of the U-SIG reservation field within the U-SIG of the EHT TB PPDU. Specifically, refer to step S401 of Example 3 and the description of the trigger frame of this example. Further details are not described herein.

[0267] The transceiver unit (11) is further configured to receive an EHT TB PPDU transmitted by the station. For the setting of the SRP field and the U-SIG reservation field in the U-SIG of the EHT TB PPDU, refer to the description in Example 3. Further details are not described herein.

[0268] The communication device (1) in the fourth design can correspondingly perform Example 4, and it should be understood that the aforementioned operation or function of the unit in the communication device (1) is separately configured to implement the corresponding operation of the AP in Example 4. For brevity, details are not described again here.

[0269] FIG. 20 is a schematic diagram of the structure of a communication device (2) according to an embodiment of the present application. The communication device (2) may be a STA or a chip within a STA, for example, a Wi-Fi chip. As shown in FIG. 17, the communication device (2) includes a transceiver unit (21) and a processing unit (22).

[0270] In the first design, the transceiver unit (12) is configured to receive a trigger frame, and the trigger frame is used to trigger the communication device (2) to transmit an EHT TB PPDU. The transceiver unit (21) is further configured to transmit an EHT TB PPDU, and the U-SIG of the EHT TB PPDU may include a U-SIG reservation field and an SRP1 field, or may include an SRP1 field and an SRP2 field.

[0271] Optionally, the processing unit (22) includes a U-SIG reservation field setting subunit (221) and an SRP field setting subunit (222).

[0272] The U-SIG reservation field setting subunit (221) is configured to set the value of the U-SIG reservation field, wherein the value of the U-SIG reservation field is determined based on whether the trigger frame transmits the special user information field. If the trigger frame does not transmit the special user information field, the value of the U-SIG reservation field is set to a default value. If the trigger frame transmits the special user information field, the value of the U-SIG reservation field is determined based on the value of the U-SIG reservation indicator field within the special user information field.

[0273] The SRP field setting subunit (222) is configured to set the values ​​of the SRP1 field and SRP2 field within the U-SIG of the EHT TB PPDU.

[0274] The values ​​of the SRP1 field and the SRP2 field are each determined based on one or more of the values ​​indicated by one or more UL SRP fields within the common information field of the trigger frame, the values ​​indicated by the UL EHT SRP field, and the values ​​indicated by the UL SRP field within the special user information field of the trigger frame.

[0275] The communication device (1) in the first design may correspondingly perform embodiments 1 to 3, and it should be understood that the aforementioned operation or function of the unit in the communication device (2) is separately configured to implement the corresponding operation of the STA in embodiments 1 to 3. For brevity, details are not described again here.

[0276] FIG. 21 is a schematic diagram of the structure of a communication device (3) according to an embodiment of the present application. The communication device (3) may be an AP or a STA. Additionally, the communication device may be a chip within the AP or STA, for example, a Wi-Fi chip. As shown in FIG. 21, the communication device (3) may include a determination unit (31) and a transceiver unit (32).

[0277] In the design, the communication device (3) is an AP or a chip within the AP. The determination unit (31) determines the transmission power of the EHT TB PPDU based on one or more of the values ​​individually indicated by the SRP1 and SRP2 fields included in the U-SIG of the EHT TB PPDU, the values ​​individually indicated by the four UL SRP fields included in the common information field of the trigger frame, or the values ​​indicated by the UL EHT SRP fields within HE-SIG-A2 of the common information field of the trigger frame. The transceiver unit (32) is configured to transmit the PSRT PPDU based on the transmission power of the PSRT PPDU.

[0278] Optionally, the transceiver unit (32) is further configured to receive a trigger frame, wherein the trigger frame contains four UL SRP fields. The value indicated by one UL SRP field is the sum of the transmission power of the first AP of one subchannel and the maximum interference power allowed by the first AP. The communication device (3) and the first AP are located in the same OBSS. The first AP represents the AP transmitting the trigger frame.

[0279] Optionally, the transceiver unit (32) is further configured to receive an EHT TB PPDU, wherein 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 subchannel and the maximum interference power allowed by the first AP. 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 allowed by the first AP. The bandwidth of the first subchannel and the bandwidth of the second subchannel are equal to half the bandwidth of the EHT TB PPDU, and the frequency of the first subchannel is smaller than the frequency of the second subchannel. The communication device (3) and the first AP are located in the same OBSS.

[0280] In this design, the communication device (3) can correspondingly perform the methods of FIGS. 13a and FIGS. 13b, and the aforementioned operation or function of the unit within the communication device (3) is configured to individually implement the corresponding operation of the second AP in FIGS. 13a and FIGS. 13b. For brevity, details are not described again here.

[0281] In another design, the communication device is a station STA or a chip within the STA. The determination unit (31) determines the transmission power of a response frame responding to the EHT TB PPDU based on one or more of the values ​​individually indicated by the SRP1 and SRP2 fields included in the U-SIG of the EHT TB PPDU, the values ​​individually indicated by the four UL SRP fields included in the common information field of the trigger frame, or the values ​​indicated by the UL EHT SRP fields within HE-SIG-A2 of the common information field of the trigger frame. The transceiver unit (32) is configured to transmit the response frame based on the transmission power of the response frame.

[0282] Optionally, the transceiver unit (32) is further configured to receive a trigger frame, wherein the trigger frame contains four UL SRP fields. The value indicated by one UL SRP field is the sum of the transmission power of the first AP of one subchannel and the maximum interference power allowed by the first AP. The communication device (3) and the first AP are located in the same OBSS. The first AP represents the AP transmitting the trigger frame.

[0283] Optionally, the transceiver unit (32) is further configured to receive an EHT TB PPDU, wherein 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 subchannel and the maximum interference power allowed by the first AP. The value indicated by the SRP2 field is the sum of the transmission power of the first AP on the second subchannel and the maximum interference power allowed by the first AP. The bandwidth of the first subchannel and the bandwidth of the second subchannel are equal to half the bandwidth of the EHT TB PPDU, and the frequency of the first subchannel is smaller than the frequency of the second subchannel. The communication device (3) and the first AP are located in the same OBSS.

[0284] Optionally, the transceiver unit (32) is further configured to receive the PSRT PPDU transmitted by the second AP.

[0285] In any one of the aforementioned designs, the decision unit (31) may be a processing unit.

[0286] In this design, the communication device (3) can correspondingly perform the method of FIG. 18, and the aforementioned operation or function of the unit within the communication device (3) is configured to individually implement the corresponding operation of the second STA in FIG. 18. For brevity, details are not described again here.

[0287] The foregoing describes AP and STA in the embodiments of this application. The following describes possible product forms of AP and STA. It should be understood that any product having the function of AP described in FIG. 19, any product having the function of STA described in FIG. 20, or any product having the function of AP or STA described in FIG. 21 falls within the protection scope of the embodiments of this application. Furthermore, it should be understood that the following description is merely illustrative and that the product forms of AP and STA in the embodiments of this application are not limited thereto.

[0288] In possible product forms, in the embodiments of this application, AP and STA can be implemented using a general bus architecture.

[0289] For ease of explanation, FIG. 22 shows a schematic diagram of the structure of a communication device (1000) according to an embodiment of the present application. The communication device (1000) may be an AP or a STA, or a chip within an AP or STA. FIG. 22 shows only the main components of the communication device (1000). 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 drawing).

[0290] The processor (1001) is configured to primarily process communication protocols and communication data, control communication devices, execute software programs, and process data of software programs. The memory (1003) is configured to primarily store software programs and data. The transceiver (1002) may include a control circuit and an antenna. The control circuit is configured to primarily perform conversion between baseband signals and radio frequency signals and to process radio frequency signals. The antenna is configured to primarily receive and transmit radio frequency signals in the form of electromagnetic waves. Input / output devices such as a touchscreen, display, and keyboard are configured to primarily receive data input by a user and output data to the user.

[0291] After the power of the communication device is turned on, the processor (1001) reads the software program from the memory (1003), interprets and executes the instructions of the software program, and processes the data of the software program. If data needs to be transmitted wirelessly, the processor (1001) performs baseband processing on the data to be transmitted and then outputs the baseband signal to the radio frequency circuit. After performing radio frequency processing on the baseband signal, the radio frequency circuit transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted 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 it.

[0292] In another embodiment, the radio frequency circuit and antenna may be positioned independently of the processor performing baseband processing. For example, in a distributed scenario, the radio frequency circuit and antenna may be positioned separately, independently of the communication device.

[0293] The processor (1001), transceiver unit (1002), and memory (1004) can be connected via a communication bus.

[0294] In the design, the communication device (1000) may be configured to perform the function of an AP in Example 1. The processor (1001) may be configured to generate a trigger frame transmitted in step S101 of FIG. 7a and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform steps S101 and S104 of FIG. 7a and / or to perform other processes of the technology described herein.

[0295] In another design, the communication device (1000) may be configured to perform the function of the STA in Example 1: the processor (1001) may be configured to generate the EHT TB PPDU transmitted in step S103 of FIG. 7a and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform steps S102 and S103 of FIG. 7a and / or to perform other processes of the technology described herein.

[0296] In the design, the communication device (1000) may be configured to perform the function of an AP in Example 1. The processor (1001) may be configured to generate a trigger frame transmitted in step S201 of FIG. 8a and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform steps S201 and S204 of FIG. 8a and / or to perform other processes of the technology described herein.

[0297] In another design, the communication device (1000) may be configured to perform the function of the STA in Example 1: the processor (1001) may be configured to generate the EHT TB PPDU transmitted in step S203 of FIG. 8a and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform steps S202 and S203 of FIG. 8a and / or to perform other processes of the technology described herein.

[0298] In the design, the communication device (1000) may be configured to perform the function of an AP in Example 2. The processor (1001) may be configured to generate a trigger frame transmitted in step S301 of FIG. 11 and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform steps S301 and S304 of FIG. 11 and / or to perform other processes of the technology described herein.

[0299] In another design, the communication device (1000) may be configured to perform the function of the STA in Example 2: the processor (1001) may be configured to generate the EHT TB PPDU transmitted in step S303 of FIG. 11 and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform steps S302 and S303 of FIG. 11 and / or to perform other processes of the technology described herein.

[0300] In the design, the communication device (1000) may be configured to perform the function of an AP in Example 3. The processor (1001) may be configured to generate a trigger frame transmitted in step S401 of FIG. 14 and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform steps S401 and S404 of FIG. 14 and / or to perform other processes of the technology described herein.

[0301] In another design, the communication device (1000) may be configured to perform the function of the STA in Example 3: the processor (1001) may be configured to generate the EHT TB PPDU transmitted in step S403 of FIG. 14 and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform steps S402 and S403 of FIG. 14 and / or to perform other processes of the technology described herein.

[0302] In the design, the communication device (1000) may be configured to perform the function of the second AP in Example 4. The processor (1001) may be configured to perform step S503 of FIG. 14 and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform step S504 of FIG. 16 and / or to perform other processes of the technology described herein.

[0303] In the design, the communication device (1000) may be configured to perform the function of the second STA in Example 4. The processor (1001) may be configured to perform step S604 of FIG. 18 and / or to perform other processes of the technology described herein. The transceiver unit (1002) may be configured to perform step S605 of FIG. 18 and / or to perform other processes of the technology described herein.

[0304] In any one of the aforementioned designs, the processor (1001) may include a transceiver configured to implement a receiving function and a transmitting function. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit configured to implement the receiving function and the transmitting function may be separate or integrated together. The transceiver circuit, interface, or interface circuit may be configured to read and write code / data. Alternatively, the transceiver circuit, interface, or interface circuit may be configured to transmit or forward a signal.

[0305] In any one of the aforementioned designs, the processor (1001) may store instructions. The instructions may be computer programs. The computer program is executed in the processor (1001) so that the communication device (1000) can perform the method described in any one of the aforementioned method embodiments. The computer program may be fixed in the processor (1001). In this case, the processor (1001) may be implemented in hardware.

[0306] In an embodiment, the communication device (1000) may include a circuit, which may implement a transmission, reception, or communication function as in the method embodiment described above. The processor and transceiver unit described in this application may be implemented as an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed-signal IC, an application-specific integrated circuit (ASIC), or a printed circuit board (PCB), an electronic device, etc. Processor and transceiver units can be manufactured using various IC technologies, for example, using complementary metal oxide semiconductor (CMOS), n-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), positive channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS, bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe) and gallium arsenide (GaAs).

[0307] The scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited by FIG. 19. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be as follows:

[0308] (1) Independent integrated circuit IC, chip or chip system or subsystem;

[0309] (2) A set comprising one or more ICs - where, optionally, the IC set may further comprise a storage component configured to store data and computer programs - ;

[0310] (3) ASIC, e.g., Modem;

[0311] (4) A module that can be embedded in another device;

[0312] (5) receiver, terminal, intelligent terminal, mobile phone, wireless device, handheld device, mobile unit, vehicle-mounted device, network device, cloud device, artificial intelligence device, etc.; or

[0313] (6) Other devices, etc.

[0314] In possible product forms, in the embodiments of this application, AP and STA may be implemented by a general-purpose processor.

[0315] A general-purpose processor for implementing an AP includes an input / output interface that is internally connected to a processing circuit and communicates with the processing circuit.

[0316] In the design, a general-purpose processor may be configured to perform the function of an AP in Example 1. Specifically, the processing circuit may be configured to generate a trigger frame transmitted in step S101 of FIG. 7a and / or to perform other processes of the technology described herein. The input / output interface may be configured to perform steps S101 and S104 of FIG. 7a and / or to perform other processes of the technology described herein.

[0317] In the design, a general-purpose processor may be configured to perform the function of an AP in Example 1. Specifically, the processing circuit may be configured to generate a trigger frame transmitted in step S201 of FIG. 8a and / or to perform other processes of the technology described herein. The input / output interface may be configured to perform steps S201 and S204 of FIG. 8a and / or to perform other processes of the technology described herein.

[0318] In the design, a general-purpose processor may be configured to perform the function of an AP in Example 2. Specifically, the processing circuit may be configured to generate a trigger frame transmitted in step S301 of FIG. 11 and / or to perform other processes of the technology described herein. The input / output interface may be configured to perform steps S301 and S304 of FIG. 11 and / or to perform other processes of the technology described herein.

[0319] In the design, the general-purpose processor may be configured to perform the function of the AP in Example 3. Specifically, the processing circuit may be configured to generate the trigger frame transmitted in step S401 of FIG. 14 and / or to perform other processes of the technology described herein. The input / output interface may be configured to perform steps S401 and S404 of FIG. 14 and / or to perform other processes of the technology described herein.

[0320] In the design, the general-purpose processor may be configured to perform the function of the second AP in Example 4. Specifically, the processing circuit is configured to perform step S503 of FIG. 16 and / or other processes of the technology described herein. The input / output interface is configured to perform step S504 of FIG. 16 and / or other processes of the technology described herein.

[0321] A general-purpose processor for implementing STA includes an input / output interface that is internally connected to a processing circuit and communicates with the processing circuit.

[0322] In the design, a general-purpose processor may be configured to perform the function of the STA in Example 1. Specifically, the processing circuit may be configured to generate the EHT TB PPDU transmitted in step S103 of FIG. 7a, and / or to perform other processes of the technology described herein. The input / output interface may be configured to perform steps S102 and S103 of FIG. 7a, and / or to perform other processes of the technology described herein.

[0323] In the design, a general-purpose processor may be configured to perform the function of the STA in Example 1. Specifically, the processing circuit may be configured to generate the EHT TB PPDU transmitted in step S203 of FIG. 8a, and / or to perform other processes of the technology described herein. The input / output interface may be configured to perform steps S202 and S203 of FIG. 8a, and / or to perform other processes of the technology described herein.

[0324] In the design, a general-purpose processor may be configured to perform the function of the STA in Example 2. Specifically, the processing circuit may be configured to generate the EHT TB PPDU transmitted in step S303 of FIG. 11, and / or to perform other processes of the technology described herein. The input / output interface may be configured to perform steps S302 and S303 of FIG. 11, and / or to perform other processes of the technology described herein.

[0325] In the design, a general-purpose processor may be configured to perform the function of the STA in Example 3. Specifically, the processing circuit may be configured to generate the EHT TB PPDU transmitted in step S403 of FIG. 14, and / or to perform other processes of the technology described herein. The input / output interface may be configured to perform steps S402 and S403 of FIG. 14, and / or to perform other processes of the technology described herein.

[0326] In the design, a general-purpose processor may be configured to perform the function of the second STA in Example 4. Specifically, the processing circuit is configured to perform step S604 of FIG. 18 and / or other processes of the technology described herein. The input / output interface is configured to perform step S605 of FIG. 18 and / or other processes of the technology described herein.

[0327] It should be understood that the communication device in the various product forms described above has any of the functions of the AP or STA in the method examples. Further details are not described herein.

[0328] Embodiments of the present application further provide a computer-readable storage medium. The computer-readable storage medium stores computer program code. When a processor executes the computer program code, the electronic device performs any one of the methods of the aforementioned embodiments.

[0329] Embodiments of this application further provide a computer program product. When the computer program product is executed on a computer, the computer performs one of the methods of the aforementioned embodiments.

[0330] Embodiments of this application further provide a communication device. The device may exist in the form of a chip product. The structure of the device includes a processor and an interface circuit. The processor is configured to communicate with another device through the interface circuit, thereby enabling the device to perform any one of the methods of the aforementioned embodiments.

[0331] Embodiments of this application further provide a wireless communication system comprising an AP and a STA. The AP and the STA may perform any one of the methods of the aforementioned embodiments.

[0332] The method or algorithm steps described in combination with the contents disclosed in this application may be implemented by hardware or by a processor by executing software instructions. Software instructions may include corresponding software modules. Software modules may be stored in Random Access Memory (RAM), flash memory, Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), registers, hard disks, removable hard disks, Compact Disc Read-Only Memory (CD-ROM), or any other form of storage medium well known in the art. For example, the storage medium may be connected to the processor so that the processor can read information from the storage medium or write information to the storage medium. Certainly, the storage medium may be a component of the processor. The processor and the storage medium may be located in an ASIC. Furthermore, the ASIC may be located in a core network interface device. Certainly, the processor and the storage medium may exist in the core network interface device as separate components.

[0333] Those skilled in the art should know that in one or more of the examples described above, the function described in this application may be implemented by hardware, software, firmware, or any combination thereof. Where the function is implemented by software, the function described above may be stored on a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. A computer-readable medium includes a computer-readable storage medium and a communication medium. A communication medium includes any medium that facilitates the transmission of a computer program from one place to another. A storage medium may be any available medium accessible to a general-purpose computer or a dedicated computer.

[0334] In the specific embodiments described above, the purpose of this application, the technical solution, and the beneficial effects have been explained in more detail. It should be understood that the foregoing description is merely a specific embodiment of this application and does not limit the scope of protection of this application. All modifications, equivalent substitutions, improvements, etc. based on the technical solution of this application fall within the scope of protection of this application.

Claims

Claim 1 A method for indicating a spatial reuse parameter in a trigger frame comprises: a step of transmitting a trigger frame by an access point (AP)—said that the trigger frame is used to trigger a station to transmit an extremely high throughput trigger-based physical layer protocol data unit (EHT TB PPDU)—and a step of receiving the EHT TB PPDU transmitted by the station by the AP—wherein a value indicated by a spatial reuse parameter (SRP) within a universal signal field (U-SIG) of the EHT TB PPDU is determined based on at least one of a value indicated by an uplink EHT spatial reuse parameter (UL EHT SRP) within a common information field of the trigger frame and a value indicated by one or more uplink spatial reuse parameter (UL SRP) fields—wherein the U-SIG includes an SRP1 field and an SRP2 field, and the value of the SRP1 field within the U-SIG is indicated by the uplink spatial reuse field of the trigger frame A method in which the value of either the UL SR1 field or the UL SR2 field within the four space reuse fields is the same as the value of either the UL SRL3 field or the UL SR4 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame. Claim 2 A communication device used in a wireless local area network (WLAN) comprises a processor configured to generate a trigger frame and a transceiver configured to transmit said trigger frame—said that the trigger frame is used to trigger a station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU)—wherein the transceiver is configured to receive said EHT TB PPDU transmitted by said station, and the value indicated by the spatial reuse parameter (SRP) in the universal signal field (U-SIG) of said EHT TB PPDU is determined based on at least one of the value indicated by the uplink EHT spatial reuse parameter (UL EHT SRP) in the common information field of said trigger frame and the value indicated by one or more uplink spatial reuse parameter (UL SRP) fields, said U-SIG includes an SRP1 field and an SRP2 field, and the value of said SRP1 field in said U-SIG is among the UL SR1 field and the UL SR2 field in the four spatial reuse fields indicated by the uplink spatial reuse field of said trigger frame A communication device that is identical to any one of the values, wherein the value of the SRP2 field in the U-SIG is identical to the value of any one of the UL SRL3 field and the UL SR4 field in the four space reuse fields indicated by the uplink space reuse field of the trigger frame. Claim 3 A method for determining a spatial reuse parameter field in a physical layer protocol data unit comprises: receiving a trigger frame by a station (STA) - said trigger frame is used to trigger the station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU) - and transmitting the EHT TB PPDU by the STA - wherein the value indicated by the SRP in the U-SIG of the EHT TB PPDU is determined based on at least one of the value indicated by the uplink EHT spatial reuse parameter (UL EHT SRP) in the common information field of the trigger frame and the value indicated by one or more UL SRP fields - wherein the U-SIG includes an SRP1 field and an SRP2 field, the value of the SRP1 field in the U-SIG is the same as the value of any one of the UL SR1 field and the UL SR2 field in the four spatial reuse fields indicated by the uplink spatial reuse field of the trigger frame, and the value of the SRP2 field in the U-SIG is the same as the A method identical to the value of any one of the UL SRL3 field and UL SR4 field within the four space reuse fields indicated by the uplink space reuse field. Claim 4 A communication device used in a wireless local area network (WLAN), comprising: a transceiver configured to receive a trigger frame—the trigger frame is used to trigger the communication device to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU)—and a processor configured to generate the EHT TB PPDU—wherein the value indicated by the SRP in the U-SIG of the EHT TB PPDU is determined based on at least one of the value indicated by the uplink EHT space reuse parameter (UL EHT SRP) in the common information field of the trigger frame and the value indicated by one or more UL SRP fields, and the transceiver is configured to transmit the EHT TB PPDU—wherein the U-SIG includes an SRP1 field and an SRP2 field, and the value of the SRP1 field in the U-SIG is identical to the value of any one of the UL SR1 field and the UL SR2 field in the four space reuse fields indicated by the uplink space reuse field of the trigger frame, and within the U-SIG A communication device in which the value of the SRP2 field is the same as the value of any one of the UL SRL3 field and the UL SR4 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame. Claim 5 A method for transmitting a trigger frame comprises the steps of: transmitting a trigger frame by an access point (AP)—wherein the trigger frame is used to trigger a station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU), and the trigger frame further includes a U-SIG reserved field indicating the value of a Universal Signal Field (U-SIG) reserved field in the EHT TB PPDU—and receiving the EHT TB PPDU transmitted by the station by the AP—wherein 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 field in the trigger frame—wherein the U-SIG includes an SRP1 field and an SRP2 field, and the value of the SRP1 field in the U-SIG is equal to the value of any one of the UL SR1 field and the UL SR2 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame, and The value of the SRP2 field in the U-SIG is the same as the value of any one of the UL SRL3 field and the UL SR4 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame. Claim 6 A communication device used in a wireless local area network (WLAN), comprising: a processor configured to generate a trigger frame— said trigger frame is used to trigger a station to transmit an ultra-high throughput trigger-based physical layer protocol data unit (EHT TB PPDU), said trigger frame further includes a U-SIG reservation indicator field indicating the value of a Universal Signal Field (U-SIG) reservation field in said EHT TB PPDU—and a transceiver configured to transmit said trigger frame, said transceiver further configured to receive said EHT TB PPDU transmitted by said station, said value of said U-SIG reservation field in the U-SIG of said EHT TB PPDU is determined based on the value of said U-SIG reservation indicator field in said trigger frame, said U-SIG includes an SRP1 field and an SRP2 field, said value of said SRP1 field in said U-SIG is any of the UL SR1 field and UL SR2 field in the four space reuse fields indicated by the uplink space reuse field of said trigger frame A communication device having a value identical to one of the values ​​of the UL SRL3 field and the UL SR4 field within the four space reuse fields indicated by the uplink space reuse field of the trigger frame. Claim 7 In paragraph 5, the above U-SIG reservation indicator field is located in a special user information field within the user information list field of the trigger frame. Claim 8 In claim 7, the association identifier (AID12) of the special user information field is a preset value or an incomplete AID12 value. Claim 9 A method according to claim 7, wherein the special user information field further comprises one UL SRP field for the U-SIG or two UL SRP fields for the U-SIG. Claim 10 A method according to claim 5, wherein the common information field of the trigger frame includes four uplink space reuse parameter (UL SRP) fields or further includes an uplink EHT space reuse parameter (UL EHT SRP) field within the reservation field of the common information field. Claim 11 delete Claim 12 A method according to claim 5, wherein an HE / EHT subfield instructing an EHT STA to transmit a high-efficiency trigger-based physical layer protocol data unit (HE TB PPDU) or an EHT TB PPDU is set in a reserved field within the common information field of the trigger frame. Claim 13 In claim 5, the trigger frame further comprises an uplink EHT PPDU bandwidth extension field used together with a UL (HE) BW field to jointly indicate uplink HE bandwidth and uplink EHT bandwidth; or a special user presence indicator subfield indicating whether a special user information field exists. Claim 14 A method for transmitting a Physical Layer Protocol Data Unit (PPDU), comprising: receiving a trigger frame by a station (STA) — said trigger frame is used to trigger the station to transmit an EHT TB PPDU, and said trigger frame further includes a Universal Signal Field (U-SIG) reservation indicator field indicating the value of a U-SIG reservation field within said EHT TB PPDU — and transmitting the EHT TB PPDU by said STA — said U-SIG reservation field value within the EHT TB PPDU is determined based on the value of the U-SIG reservation indicator field within the trigger frame — wherein said U-SIG includes an SRP1 field and an SRP2 field, said SRP1 field value within the U-SIG is equal to any one of the UL SR1 field and the UL SR2 field within the four space reuse fields indicated by the uplink space reuse field of said trigger frame, and said SRP2 field value within the U-SIG is the uplink A method including a value identical to any one of the UL SRL3 field and UL SR4 field within the four space reuse fields indicated by the space reuse field. Claim 15 A communication device used in a wireless local area network (WLAN), comprising: a transceiver configured to receive a trigger frame—the trigger frame is used to trigger a station to transmit an EHT TB PPDU, and the trigger frame further comprises a Universal Signal Field (U-SIG) reservation indicator field indicating the value of a U-SIG reservation field within the EHT TB PPDU—and a processor configured to generate the EHT TB PPDU—the value of the U-SIG reservation field within the Universal Signal Field (U-SIG) of the EHT TB PPDU is determined based on the value of the U-SIG reservation indicator field within the trigger frame—the transceiver is further configured to transmit the EHT TB PPDU, and the value of the U-SIG reservation field within the Universal Signal Field (U-SIG) of the EHT TB PPDU is determined based on the value of the U-SIG reservation indicator field within the trigger frame, and the U-SIG includes an SRP1 field and an SRP2 field, and A communication device in which the value of the SRP1 field in the U-SIG is the same as the value of either the UL SR1 field or the UL SR2 field in the four space reuse fields indicated by the uplink space reuse field of the trigger frame, and the value of the SRP2 field in the U-SIG is the same as the value of either the UL SRL3 field or the UL SR4 field in the four space reuse fields indicated by the uplink space reuse field of the trigger frame. Claim 16 In paragraph 14, the above U-SIG reservation indicator field is located in a special user information field within the user information list field of the trigger frame. Claim 17 In paragraph 16, the association identifier (AID12) of the special user information field is a preset value or an incomplete AID12 value. Claim 18 In paragraph 16, the method wherein the special user information field further comprises one UL SRP field for the U-SIG or two UL SRP fields for the U-SIG. Claim 19 A method according to claim 14, wherein the common information field of the trigger frame includes four uplink space reuse parameter (UL SRP) fields or further includes an uplink EHT space reuse parameter (UL EHT SRP) field within the reservation field of the common information field. Claim 20 A computer-readable storage medium, wherein the computer-readable storage medium stores program instructions, and when the instructions are executed by a computer, the computer performs a method according to any one of claims 1, 3, 5, 7 through 10, 12 through 14 and 16 through 19. Claim 21 In paragraph 6, the communication device, wherein the U-SIG reservation indicator field is located in a special user information field within the user information list field of the trigger frame. Claim 22 A communication device according to claim 21, wherein the association identifier (AID12) of the special user information field is a preset value or an incomplete AID12 value. Claim 23 A communication device according to claim 21 or 22, wherein the special user information field further comprises one UL SRP field for the U-SIG or two UL SRP fields for the U-SIG. Claim 24 A communication device according to any one of claims 6, 21, and 22, wherein the common information field of the trigger frame includes four uplink space reuse parameter (UL SRP) fields or further includes an uplink EHT space reuse parameter (UL EHT SRP) field within the reservation field of the common information field. Claim 25 delete Claim 26 A communication device according to claim 6, wherein an HE / EHT subfield instructing an EHT STA to transmit a high-efficiency trigger-based physical layer protocol data unit (HE TB PPDU) or an EHT TB PPDU is set in a reserved field within the common information field of the trigger frame. Claim 27 A communication device according to claim 6, wherein the trigger frame further comprises an uplink EHT PPDU bandwidth extension field used together with a UL (HE) BW field to jointly indicate uplink HE bandwidth and uplink EHT bandwidth; or a special user presence indicator subfield indicating whether a special user information field exists. Claim 28 In paragraph 15, the communication device wherein the above-mentioned U-SIG reservation indicator field is located in a special user information field within the user information list field of the above-mentioned trigger frame. Claim 29 A communication device according to claim 28, wherein the association identifier (AID12) of the special user information field is a preset value or an incomplete AID12 value. Claim 30 A communication device according to claim 28 or 29, wherein the special user information field further comprises one UL SRP field for the U-SIG or two UL SRP fields for the U-SIG. Claim 31 A communication device according to claim 15, wherein the common information field of the trigger frame includes four uplink space reuse parameter (UL SRP) fields or further includes an uplink EHT space reuse parameter (UL EHT SRP) field within the reservation field of the common information field. Claim 32 delete

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