Transmission method and device, equipment and readable storage medium

Abstract

Provided are a transmission method, apparatus and device, the method comprising: a first access point device obtaining a target interference power on a target channel, the target channel being a channel used by the first access point device for transmission with a first station device, and the target interference power being received by the first access point device; the target channel is overlapped with a main channel of second access point equipment; and under the condition that the target interference power satisfies a preset condition, the first access point device sends first information to the second access point device, the first information being used for the second access point device to start to use a non-main channel to access an NPCA main channel for transmission, or, the second access point device adopts a power reduction mode for transmission on a main channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, and more particularly, to a transmission method, device, apparatus and readable storage medium. BACKGROUND

[0002] In some scenarios, there can be an overlap between channels of adjacent access points (APs), so that transmission between one AP and its associated STA can interfere with transmission between a neighboring AP and its associated STA, in which case, how to perform transmission to ensure transmission performance between each AP and its associated STA is an urgent problem to be solved. SUMMARY

[0003] The present application provides a transmission method, device, apparatus and readable storage medium, which is beneficial to ensure transmission performance between an AP and an associated STA.

[0004] In a first aspect, a transmission method is provided, comprising:

[0005] A first access point device acquires target interference power received on a target channel, wherein the target channel is a channel used by the first access point device for transmission with a first station device, and the target channel overlaps with a primary channel of a second access point device;

[0006] In a case where the target interference power meets a preset condition, the first access point device sends first information to the second access point device, the first information being used by the second access point device to start transmission using a non-primary channel access (NPCA) primary channel or to perform transmission in a reduced power mode on the primary channel.

[0007] In a second aspect, a transmission method is provided, comprising:

[0008] A second access point device receives first information of a first access point device, the first information being used by the second access point device to start transmission using a non-primary channel access (NPCA) primary channel or to perform transmission in a reduced power mode on the primary channel;

[0009] The second access point device performs transmission using the NPCA primary channel or performs transmission in a reduced power mode on the primary channel.

[0010] In a third aspect, a communication apparatus is provided, comprising:

[0011] A processing module is configured to acquire target interference power received on a target channel, wherein the target channel is a channel used by the first access point device for transmission with a first station device, and the target channel overlaps with a primary channel of a second access point device;

[0012] The sending module is configured to send first information to the second access point device, where the first information is used by the second access point device to start transmission using a non-primary channel access (NPCA) primary channel or to perform transmission on the primary channel in a reduced power mode, when the target interference power meets a preset condition.

[0013] In a fourth aspect, a communication apparatus is provided, which comprises:

[0014] The communication module is configured to receive first information of the first access point device, where the first information is used by the second access point device to start transmission using a non-primary channel access (NPCA) primary channel or to perform transmission on the primary channel in a reduced power mode.

[0015] The transmission is performed using the NPCA primary channel or in the reduced power mode on the primary channel.

[0016] In a fifth aspect, a communication device is provided, which comprises a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke and run the computer program stored in the memory to perform the method in the first aspect or each implementation manner thereof, or to perform the method in the second aspect or each implementation manner thereof.

[0017] In a sixth aspect, a chip is provided, which is configured to implement the method in any one of the first aspect to the second aspect or each implementation manner thereof. Specifically, the chip comprises a processor configured to invoke and run a computer program from a memory, so that a device installed with the chip performs the method in any one of the first aspect to the second aspect or each implementation manner thereof.

[0018] In a seventh aspect, a readable storage medium is provided, which is configured to store a computer program, and the computer program causes a computer to perform the method in any one of the first aspect to the second aspect or each implementation manner thereof.

[0019] In an eighth aspect, a computer program product is provided, which comprises computer program instructions, and the computer program instructions cause a computer to perform the method in any one of the first aspect to the second aspect or each implementation manner thereof.

[0020] In a ninth aspect, a computer program is provided, which, when running on a computer, causes the computer to perform the method in any one of the first aspect to the second aspect or each implementation manner thereof.

[0021] Through the technical solution, the first access point device can acquire the target interference power suffered by the target channel used for transmission by the first access point device and the first station device, and in the case that the target interference power meets a preset condition, the first information is used to instruct the second access point device to start transmission using the non-primary channel access (NPCA) primary channel or to adopt a power reduction mode for transmission on the primary channel, which is beneficial to reduce the interference of the transmission of the second access point device on the transmission between the first access point device and the first station device, and ensure the transmission performance between the first access point device and the second access point device and the station devices associated therewith. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of a communication system suitable for embodiments of the present application.

[0023] Figure 2 is a frame format carrying BSSID information through a MAC header.

[0024] Figure 3 is a frame format carrying BSS Color information after 802.11ax.

[0025] Figure 4 is a frame format carrying BSS Color information after 802.11be.

[0026] Figure 5 shows a topology diagram of a parameterized spatial multiplexing transmission.

[0027] Figure 6 shows a schematic diagram of a parameterized spatial multiplexing transmission.

[0028] Figure 7 is a channel distribution schematic diagram provided by embodiments of the present application.

[0029] Figure 8 shows an example diagram of switching from a primary channel to an NPCA primary channel.

[0030] Figure 9 is a schematic diagram of a transmission method provided by embodiments of the present application.

[0031] Figure 10 is a channel distribution schematic diagram of a first access point device and a second access point device provided by embodiments of the present application.

[0032] Figure 11 is a format schematic diagram of a first frame carrying first information provided by embodiments of the present application.

[0033] Figure 12 is a schematic diagram of another transmission method provided by embodiments of the present application.

[0034] Figure 13 A network topology diagram suitable for embodiments of the application.

[0035] Figure 14 is a schematic flow diagram of a transmission method provided by embodiments of the application.

[0036] Figure 15 is a schematic interaction diagram of a transmission method provided by embodiments of the application.

[0037] Figure 16 Another network topology diagram suitable for embodiments of the application.

[0038] Figure 17 is a schematic flow diagram of another transmission method provided by embodiments of the application.

[0039] Figure 18 is a schematic interaction diagram of another transmission method provided by embodiments of the application.

[0040] Figure 19 is a schematic diagram of a communication device provided by embodiments of the application.

[0041] Figure 20 is a schematic diagram of another communication device provided by embodiments of the application.

[0042] Figure 21 is a schematic block diagram of a communication device provided by embodiments of the application.

[0043] Figure 22 is a schematic block diagram of a chip provided by embodiments of the application. DETAILED DESCRIPTION

[0044] The technical solutions in embodiments of the present application will be described below with reference to the drawings in embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative labor on the basis of the embodiments in the present application shall fall within the scope of protection of the present application.

[0045] It should be noted that, in this document, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a list of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article or device. In addition, the terms "first" and "second" and the like referred to herein are only used to distinguish different objects, and are not used to describe a specific order.

[0046] It should be noted that in the embodiments of the present application, "at least one / term" means one / term or more than one / term,

[0047] "Multiple / term" means two / term or more than two / term, and "at least two / term" means two / term or more than two / term.

[0048] "at least one / term" or the like can refer to any combination of these terms. For example, at least one / term of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

[0049] It should be noted that in the embodiments of the present application, "and / or" means that the connected objects can have three relationships, for example, "A and / or B" can mean: only A, only B and A and B exist at the same time. The character " / " generally represents that the front and rear associated objects are a kind of "or" relationship.

[0050] It should be understood that the "indication" mentioned in the embodiments of the present application can be direct indication or indirect indication. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; or it can mean that A indirectly indicates B, for example, A indicates C, B can be obtained through C, for example, B and C have an association relationship.

[0051] The technical solutions provided by the embodiments of the present application can be applied to wireless local area network (English: wireless local area network, abbreviated as WLAN) system, such as WiFi protocol, etc. The WiFi protocol may, for example, include but not limited to 802.11 series protocol, such as 802.11b protocol, 802.11a protocol, 802.11g protocol, 802.11n protocol, 802.11ac protocol, 802.11ax, 802.11be, 802.11bn protocol or next generation protocol, etc. Alternatively, it can also be applied to wireless personal area network system based on ultra wide band (English: Ultra Wide Band, abbreviated as UWB), sensing system, etc.

[0052] Figure 1 A schematic structural diagram of a communication system 100 suitable for the embodiments of the present application is shown. The communication system 100 can include an access point (English: Access Point, abbreviated as AP) 110, and a station (English: STATION, abbreviated as STA) 120. The station 120 can access the network through the access point 110.

[0053] The access point can support communication or sensing based on a WiFi protocol, for example, support communication or sensing based on an 802.11b protocol, an 802.11a protocol, an 802.11g protocol, an 802.11n protocol, an 802.11ac protocol, an 802.11ax protocol, an 802.11be protocol, an 802.11bn protocol, or a next-generation protocol.

[0054] The station can support communication or sensing based on a WiFi protocol, for example, support communication or sensing based on an 802.11b protocol, an 802.11a protocol, an 802.11g protocol, an 802.11n protocol, an 802.11ac protocol, an 802.11ax protocol, an 802.11be protocol, an 802.11bn protocol, or a next-generation protocol.

[0055] The communication in the communication system 100 can be communication between an access point and a station, or can also be communication between stations, or can also be communication between access points.

[0056] The access point is equivalent to a bridge connecting the wired network and the wireless network, and mainly functions to connect various wireless network clients together and then access the wireless network to the Ethernet.

[0057] The station or non-AP station (English: non-AP STA), the access point or AP station (English: AP STA), that is, in a certain sense, the access point is also a kind of station.

[0058] In some scenarios, the access point and the station can be devices applied to the Internet of Vehicles, Internet of Things nodes, sensors, etc. in the Internet of Things (English: Internet Of Things, abbreviated as IoT), smart cameras, smart remote controllers, smart water meters, etc. in smart home, and sensors, etc. in smart city.

[0059] In some scenarios, the access point can be a terminal device (such as a mobile phone, etc.) or a network device (such as a router, etc.) with a WiFi chip.

[0060] In the embodiments of the present application, the station can be a mobile phone, a tablet computer, a computer, a virtual reality (VR) device, an augmented reality (AR) device, a wireless device in industrial control, a set-top box, a wireless device in self-driving, a vehicle-mounted communication device, a wireless device in remote medical treatment, a wireless device in smart grid, a wireless device in transportation safety, a wireless device in smart city, a wireless device in smart home, a wireless communication chip, and the like supporting WLAN or WiFi technology.

[0061] It should be understood that, Figure 1 Only one access point and two stations are exemplified, and optionally, the communication system 100 can include multiple access points, or other numbers of stations, which are not limited in the embodiments of the present application.

[0062] Optionally, the communication system 100 can further include other devices, such as a network controller, a gateway, and other network entities, which are not limited in the present application.

[0063] For the convenience of understanding the embodiments of the present application, the related technologies of the present application are described.

[0064] 1. Signal source determination

[0065] In the system before 802.11ax, the WiFi device needs to receive a complete data packet, parse the media access control protocol data unit (MPDU) from the physical layer protocol data unit (PPDU), and then determine whether the PPDU is from the current BSS or the neighbor BSS according to the basic service set identifier (BSSID) information in the MAC header. The BSS coloring technology after 802.11ax makes the WiFi device know whether the PPDU is from the current BSS or the neighbor BSS without parsing the BSSID information in the MAC layer, thereby saving the processing time of parsing the data packet, so that the WiFi device can determine as soon as possible whether to use the spatial multiplexing technology to transmit data, Figure 2The frame format before 802.11ax carrying BSSID information through the MAC header is shown, Figure 3 The frame format after 802.11ax carrying BSS Color information is shown, Figure 4 The frame format after 802.11be carrying BSS Color information is shown.

[0066] 2. Spatial multiplexing technology

[0067] Spatial multiplexing is a new technology introduced by 802.11ax. When an AP or STA detects an overlapping basic service set (OBSS) signal, if the strength of the OBSS signal is below a certain threshold value, the data packets of the BSS can be transmitted through spatial multiplexing technology. When spatial multiplexing is performed, the transmission power of the device is reduced to reduce the reverse interference on the data being transmitted. For example, the transmission power is reduced through the overlapping service set threshold value OBSS_PD level :

[0068] TX_PWR max = TX_PWR ref - (OBSS_PD level - OBSS_PD min )

[0069] Where TX_PWR max is the maximum transmission power allowed by the spatial multiplexing technology;

[0070] TX_PWR ref is the reference transmission power of the spatial multiplexing technology, which is 21 dBm;

[0071] OBSS_PD min is the lowest CCA-PD = -82dbm, OBSS_PD max is CCA-ED = -62dbm, where OBSS_PD min <OBSS_PD level <OBSS_PD max

[0072] From which the lowest TX_PWR max is 1dbm and the highest TX_PWR max is 21dbm.

[0073] 3. Parameterized spatial multiplexing technology

[0074] Starting with 802.11ax, Parameterized Spatial Reuse (PSR) transmission is supported. The master access point (AP) broadcasts a Parameterized Spatial Reuse Reception (PSRR) PPDU to instruct the target STA to perform uplink transmission. This configures the target STA with the master AP's Received Signal Strength Indication (RSSI), target modulation and coding scheme (MCS), and master AP transmit power (AP TX power). Figure 5 A topology diagram of parameterized spatial multiplexing transmission is shown. Figure 6 A schematic diagram of a parameterized spatial multiplexing transmission is shown.

[0075] The following, combined with Figure 5 and Figure 6 This document describes the interference measurements related to this application.

[0076] In this embodiment of the application, it is assumed that the uplink and downlink measurement results of the interference are consistent.

[0077] The master AP can schedule STA1 to send uplink signals by sending a PSRR PPDU. For example, in scheduling STA1, the master AP can configure STA1 to use the MCS for the uplink signal and the target received power RSSI reaching the master AP. target At the same time, limit the interference power I generated by non-associated STAs receiving this PSRR PPDU. AP That is, the acceptable receiver interference level of the AP: where I AP It can be calculated using the following formula:

[0078] I AP =RSSI target -SNR min -Margin

[0079] Among them, SNR min It can be the minimum SNR value corresponding to the MCS of the uplink signal at a 10% Packet Error Rate (PER). Margin is the safety power redundancy determined by the AP, which is optional and cannot exceed 5dB.

[0080] Assuming that the power of the PSRR PPDU received by STA2 is RPL, the STA2 performs uplink transmission to generate interference to the primary AP, and the interference power must be less than I AP , to meet the spatial reuse of the primary AP, then the STA2 needs to perform power backoff, and the interference power I STA2 generated by the STA2 performing uplink transmission to the primary AP is:

[0081] I STA2 = P STA2 -(P AP -RPL)

[0082] Wherein, P STA2 represents the transmission power of the STA2, P AP represents the transmission power of the AP, according to I STA2 ≤I AP , it can be determined that:

[0083] P STA2 ≤I AP +P AP -RPL

[0084] In some scenarios, with the rapid increase of WiFi devices, dense wireless network environment will become the mainstream form of future wireless network environment. In the multi-AP deployment scenario, there is an overlap of wireless signals between APs. In the channel access mode based on competition, the main way to optimize the dense network is to reduce the mutual interference between APs as much as possible, and using the channel access mode based on multi-AP coordination can maximize the use of limited time-frequency domain air interface resources to improve the data transmission efficiency in the multi-AP scenario. Therefore, the multi-AP coordination technology has become the key research direction of 802.11bn standard.

[0085] When multiple APs transmit on the same frequency domain resource, coordinated spatial reuse (CSR) makes the transmission between BSSs not interfered by means of power control.

[0086] In some scenarios, considering the case that the primary channel is interfered, the AP and the STA end switch to the non-primary channel access (English: Non-primary channel access, NPCA) primary channel (NPCA primary channel) for access, expand the dependence on the primary channel and better use only the transmission opportunity on the idle non-primary channel, and improve the spectrum utilization.

[0087] For an IEEE 802.11bn ultra high reliability (English: Ultra High Reliability, UHR) system, any bandwidth is composed of a primary channel and a secondary channel, such asFigure 7 As shown, the 320MHz channel has a primary 20MHz channel, a secondary 20MHz channel, a primary 40MHz channel, a secondary 40MHz channel, and the like, one of the secondary channels is selected as the NPCA primary channel, for example, channel 1 is set as the primary channel (PC) and channel 9 is set as the NPCA primary channel.

[0088] The prerequisite for the AP or STA switching from the primary channel to the NPCA primary channel for channel access is that the NPCA primary channel is idle when it is identified that the primary channel is interfered by other cell signals such as an overlapping basic service set (OBSS), and the NPCA primary channel access is initiated, the identification of the OBSS frame determines the time of switching from the primary channel to the NPCA primary channel, Figure 8 An example diagram of switching from the primary channel to the NPCA primary channel is shown.

[0089] In some scenarios, a multi-AP coordination technology is proposed in 802.11be to solve the problem of inter-AP co-frequency interference and competition conflict, under which APs exchange information and reach coordination, so that the communication process with neighboring APs is orthogonal in the frequency domain, time domain or spatial domain, thereby reducing the conflict and interference between APs.

[0090] For example, APs can perform coordinated transmission based on a transmission opportunity (TXOP) sharing architecture. For example, the AP competes for a TXOP as the beginning of the coordination procedure, and the AP initiates the coordination procedure by sending a trigger frame to the neighboring AP to exchange coordination information, and the coordination time is in units of a TXOP.

[0091] In the multi-AP coordination scenario, there may be an overlap between the channels of neighboring APs, and multi-AP coordinated transmission may affect the transmission between the AP and the associated STA, in this case, how to perform multi-AP coordinated transmission to reduce interference to other transmissions is a problem that needs to be solved urgently.

[0092] The technical solutions of the present application will be described in detail below through specific embodiments. The above related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, which all belong to the protection scope of the embodiments of the present application.

[0093] Figure 9 is a schematic diagram of the transmission method 200 according to the embodiments of the present application, as shown, the method 200 includes at least part of the following contents: Figure 9

[0094] ​S210, the first access point device acquires a target interference power suffered on a target channel, wherein the target channel is a channel used by the first access point device for transmission with the first station device, and the target channel overlaps with a primary channel of the second access point device;

[0095] S220, in a case where the target interference power satisfies a preset condition, the first access point device sends first information to the second access point device, the first information being used for the second access point device to start transmission using the NPCA primary channel, or to adopt a power reduction manner for transmission on the primary channel.

[0096] Optionally, the station device in the embodiments of the present application can be Figure 1 The station 120 in the communication system shown in FIG. 1, or a non-AP STA, for example, the first station device can be, but is not limited to, various types of the station 120, and the access point device in the embodiments of the present application can be Figure 1 The access point 110 in the communication system shown in FIG. 1, or an AP STA, for example, the access point device can be, but is not limited to, various types of the access point 110.

[0097] It should be understood that the embodiments of the present application can be applied to a multi-AP cooperation scenario, or can also be applied to other scenarios where there is channel overlap between APs, which is not limited by the present application, and the following will be described taking the multi-AP cooperation scenario as an example, but the present application is not limited thereto.

[0098] In some embodiments of the present application, transmission on the primary channel can include, but is not limited to, spatial multiplexing transmission on the primary channel, and the power reduction manner for transmission on the primary channel can include, but is not limited to, spatial multiplexing transmission on the primary channel using a power reduction manner.

[0099] In some embodiments, the first access point device and the second access point device can be two access point devices in multi-AP cooperative transmission, for example, the first access point device is a master access point device, and the second access point device is a slave access point device.

[0100] In some embodiments, the first access point device and the second access point device have channel overlap, for example, the primary channel of the first access point device overlaps with the channel of the second access point device, for example, as shown in Figure 10 The primary channel of the first access point device and the primary channel of the second access point device overlap, and the primary channel of the second access point device overlaps, so that when the first access point device sends a signal on the primary channel, the primary channel of the second access point device will suffer OBSS interference, in other words, when the second access point device sends a signal on the primary channel, the primary channel of the first access point device will also suffer OBSS interference.

[0101] In some embodiments, the NPCA primary channel of the second access point device does not overlap with the channel of the first access point device, for example, as shown in FIG. 3, the NPCA primary channel of the second access point device does not overlap with the primary channel of the first access point device, so that the transmission of the first access point device on the primary channel is not affected when the second access point device transmits on the NPCA primary channel. Figure 10

[0102] In the embodiments of the present application, for the convenience of distinguishing and description, the transmission scheme using the NPCA primary channel for transmission is recorded as the first transmission scheme, and the transmission scheme using the primary channel for power reduction transmission is recorded as the second transmission scheme. Optionally, the second transmission scheme can include only using the primary channel for power reduction transmission, or can also include using the primary channel and the NPCA primary channel for power reduction transmission, wherein the power reduction transmission in the second transmission scheme can be relative to the first transmission scheme, that is, the transmission power of using only the primary channel or simultaneously using the primary channel and the NPCA primary channel for transmission is lower than the transmission power of using only the NPCA primary channel for transmission.

[0103] Optionally, when the second access point device supports channel access using the NPCA primary channel, the second access point device can use the NPCA primary channel for transmission, or use the primary channel and the NPCA primary channel for power reduction transmission; when the second access point device does not support channel access using the NPCA primary channel, the second access point device can only use the primary channel for power reduction transmission.

[0104] In some embodiments of the present application, when the target interference power on the target channel meets the preset condition, it can be considered that the transmission between the first access point device and the first station device is interfered greatly, since the primary channel of the second access point device overlaps with the target channel, it can be considered that the transmission of the second access point device using the primary channel interferes the transmission between the first access point device and the first station device greatly, if the second access point device does not adjust the transmission scheme, it will affect the transmission performance between the first access point device and the first station device, in this case, the first access point device can indicate the second access point device to start using the NPCA primary channel for transmission, or to use the primary channel (for example, only using the primary channel, or using the primary channel and the NPCA primary channel) for power reduction transmission, so as to reduce the interference of the transmission of the second access point device to the transmission between the first access point device and the first station device.

[0105] In some embodiments of the present application, the first access point device obtains the target interference power on the target channel, comprising:

[0106] ​In a case that the first access point device and the first station device perform uplink transmission, the first access point device obtains a first interference power on a first channel, wherein the first channel is a channel used by the first access point device to receive the uplink transmission of the first station device, the first interference power is an interference power of the downlink transmission of the second access point device on the uplink reception on the first channel, and the first channel overlaps with a primary channel of the second access point device.

[0107] Specifically, in a case that the first access point device and the second station device perform uplink transmission, the first access point device is a receiving end device of the uplink transmission, and the first access point device receives the uplink transmission by using a first channel. Since the first channel overlaps with a primary channel of the second access point device, the downlink transmission of the second access point device on the primary channel can interfere with the uplink reception of the first access point device. Therefore, the first access point device can obtain a first interference power on the first channel, and evaluate an interference level of the first channel according to the first interference power. When the interference level of the first channel is large, it can be considered that the downlink transmission of the second access point device on the primary channel greatly interferes with the uplink transmission between the first access point device and the first station device. That is, the downlink transmission of the second access point device on the primary channel affects the uplink transmission between the first access point device and the first station device. Therefore, the first access point device can send first information to the second access point device, to instruct the second access point device to start transmission by using the NPCA primary channel, or to perform power reduction transmission by using the primary channel, to reduce the interference of the downlink transmission of the second access point device on the uplink transmission between the first access point device and the first station device.

[0108] Optionally, the first interference power can be obtained by the first access point device by measuring a downlink signal sent by the second access point device on the first channel. For example, the first access point device can obtain the first interference power by performing measurement on a beacon frame sent by the second access point device on the primary channel.

[0109] Optionally, the first interference power can also be estimated by the first access point device according to a first transmission power and a first path loss. For example, the first access point device can determine a difference between the first transmission power and the first path loss as the first interference power. The first path loss is a path loss between the first access point device and the second access point device, and the first transmission power is a transmission power used by the second access point device to send the downlink signal on the primary channel.

[0110] Optionally, the first transmission power can be obtained by the first access point device by receiving a trigger frame of the second access point device for the downlink signal.

[0111] Optionally, the first path loss can be determined according to a distance between the first access point device and the second access point device and a frequency point of the downlink signal. For example, the first path loss can be determined according to the following formula:

[0112] Loss = 32.44 + 20lg(d) + 20lg(f)

[0113] wherein, Loss represents the first path loss, d represents the distance between the first access point device and the second access point device, and f represents the frequency point of the downlink signal.

[0114] In some embodiments, the target interference power satisfies a preset condition, which includes:

[0115] the first interference power is greater than a first threshold; or

[0116] the first interference power is greater than or equal to the first threshold.

[0117] Optionally, the first threshold can be considered as a maximum interference power acceptable to the first access point device, denoted as I AP .

[0118] When the first interference power is greater than or equal to the first threshold, it can be considered that the downlink transmission of the second access point device using the primary channel has a relatively large interference on the uplink reception of the first access point device, and if the second access point device does not adjust the transmission scheme and continues to have the interference, the uplink transmission performance between the first access point device and the first station device will be affected. Therefore, the first access point device can instruct the second access point device to switch to transmission using the NPCA primary channel, or to perform downlink transmission using the primary channel with power reduction, so as to reduce the interference of the downlink transmission of the second access point device on the uplink reception of the first access point device.

[0119] In some embodiments, the first threshold is determined according to at least one of a first target received power, a target signal-to-noise ratio (SNR) and a safety power redundancy, wherein the first target received power is a target received power corresponding to the uplink reception of the first access point device, the target SNR is determined according to a target modulation and coding scheme (MCS), and the target MCS is a MCS corresponding to the uplink transmission between the first access point device and the first station device.

[0120] For example, when the first access point device and the first station device perform uplink transmission, the first access point device can determine a target received power (i.e., the first target received power) of a receiving end (i.e., the first access point device side) of the uplink transmission and a target MCS corresponding to the uplink transmission, and determine a target SNR according to the target MCS, for example, the target SNR can be a minimum SNR corresponding to 10% PER of the target MCS.

[0121] Optionally, the safety power redundancy can be predefined, or determined by the first access point device, for example, the safety power redundancy is not more than 5dB.

[0122] In some implementations, the first threshold I AP The first threshold I can be determined according to the following formula (1):

[0123] I AP = RSSI AP - SNR min - Margin Formula (1)

[0124] Wherein, RSSI AP represents the first target received power, SNR min represents the target SNR, and Margin represents the safety power redundancy.

[0125] In some embodiments of the present application, the first access point device obtains the target interference power received on the target channel, comprising:

[0126] In the case that the first access point device and the first station device perform downlink transmission, the first access point device obtains the second interference power received on the second channel, wherein the second channel is a channel used by the first station device to receive the downlink transmission of the first access point device, the second interference power is the interference power of the downlink transmission of the second access point device to the downlink reception on the second channel, and the second channel overlaps with the primary channel of the second access point device.

[0127] Specifically, in the case that the first access point device and the second station device perform downlink transmission, the first station device is a receiving end device of the downlink transmission, and the first station device uses the second channel to receive the downlink transmission. Since the second channel overlaps with the primary channel of the second access point device, the downlink transmission of the second access point device using the primary channel will interfere with the downlink reception of the first station device. Therefore, the first access point device can obtain the second interference power received on the second channel, and evaluate the interference level of the second channel according to the second interference power. When the interference level of the second channel is large, it can be considered that the downlink transmission of the second access point device using the primary channel has large interference with the downlink transmission between the first access point device and the first station device, that is, the downlink transmission of the second access point device on the primary channel affects the downlink transmission between the first access point device and the first station device. Therefore, the first access point device can send first information to the second access point device, instructing the second access point device to start transmitting using the NPCA primary channel, or to perform power reduction transmission using the primary channel, to reduce the interference of the downlink transmission of the second access point device with the downlink transmission between the first access point device and the first station device.

[0128] Optionally, the first channel and the second channel can be the same, or can be different.

[0129] Optionally, the target interference power satisfying the preset condition comprises: the second interference power being greater than a second threshold; or, the second interference power being greater than or equal to the second threshold.

[0130] Optionally, the second threshold can be considered as a maximum interference power acceptable by the first station device, denoted as I STA .

[0131] When the second interference power is greater than or equal to the second threshold, it can be considered that the downlink transmission of the second access point device using the primary channel has a relatively large interference on the downlink reception of the first station device. If the second access point device does not adjust the transmission scheme and continues to have an impact on the downlink transmission performance between the first access point device and the first station device, the first access point device can instruct the second access point device to switch to transmission using the NPCA primary channel, or to use the primary channel for power reduction transmission, so as to reduce the interference of the downlink transmission of the second access point device on the downlink reception of the first station device.

[0132] Optionally, the second threshold is determined according to a minimum reception power (denoted as RSSI STA ) of the first station device receiving the downlink transmission of the first access point device. Optionally, the minimum reception power can be a receiver minimum input level sensitivity of the first station device. Optionally, the second threshold can be determined according to a target MCS corresponding to the current downlink transmission.

[0133] In one specific embodiment, the second threshold can be determined according to a minimum reception power and a safety power margin of the first station device receiving the downlink transmission of the first access point device.

[0134] In some implementations, the second threshold I STA can be determined according to the following formula (2):

[0135] I STA = RSSI STA -Margin formula (2)

[0136] wherein RSSI STA represents the minimum reception power of the first station device receiving the downlink transmission of the first access point device, and Margin represents the safety power margin.

[0137] In some embodiments, the second interference power can be measured by the first access point device, or estimated by the first access point device, for example, according to the first interference power estimation. Based on the principle that the station device is always managed by the access point device which is closer to itself, when the first station device is located at the midpoint of the first access point device and the second access point device, the first station device is most interfered by the second access point device, because the path loss between the first station device and the second access point device at this time is half of the first path loss, and accordingly, the maximum value of the second interference power is 6dB greater than the first interference power, that is, the second interference power ≤ the first interference power + 6dB. In a specific embodiment, the sum of the first interference power and 6dB can be taken as the second interference power.

[0138] In some embodiments of the present application, the first information includes but is not limited to at least one of the following:

[0139] The first indication information is used to indicate that the second access point device uses a non-primary channel access (NPCA) primary channel for transmission, or uses a power reduction mode on the primary channel for transmission.

[0140] The third threshold (denoted as NPCA_PD) is used for the second access point device to determine whether to use the NPCA primary channel for transmission.

[0141] The fourth threshold (denoted as OBSS_PD) is used for the second access point device to determine the power reduction required for transmission on the primary channel.

[0142] For example, after receiving the first indication information, the second access point device can start to use the NPCA primary channel for transmission, or only use the primary channel to transmit in a power reduction mode, or use the primary channel and the NPCA primary channel to transmit in a power reduction mode.

[0143] Optionally, in the case that the second access point device supports channel access using the NPCA primary channel, the second access point device can use the NPCA primary channel for transmission according to the first indication information, or use the primary channel and the NPCA primary channel for power reduction transmission; in the case that the second access point device does not support channel access using the NPCA primary channel, the second access point device can only use the primary channel for power reduction transmission according to the first indication information.

[0144] In some embodiments, the second access point device can determine the transmission scheme after using the NPCA primary channel for transmission or using the primary channel in a power reduction mode according to the first indication information, for example, whether to continue using the NPCA primary channel for transmission, or whether to continue using the primary channel in a power reduction mode.

[0145] In some embodiments, the third threshold is determined according to the first threshold or the second threshold, for example, the first threshold or the second threshold can be taken as the third threshold. That is, NPCA_PD = I AP or I STA .

[0146] In some embodiments, the fourth threshold can be used by the second access point device to determine the reduced power size when transmitting using the second transmission scheme. For example, the reduced power value can be determined according to the fourth threshold and the packet detection threshold of the clear channel assessment, for example, the reduced power value (denoted as ΔP) can be equal to OBSS_PD - OBSS_PD min .

[0147] Optionally, the fourth threshold (denoted as OBSS_PD) can be determined according to the first interference power, the first threshold and the packet detection threshold of the clear channel assessment (i.e. CCA-PD).

[0148] For example, the fourth threshold can be determined according to the following formula (3):

[0149] OBSS_PD = P I1 -I AP + OBSS_PD min Formula (3)

[0150] wherein P I1 represents the first interference power, I AP represents the first threshold, and OBSS_PD min is determined according to CCA-PD, for example, OBSS_PD min may be equal to -82dBm.

[0151] Optionally, the fourth threshold can be determined according to the second interference power, the second threshold and the packet detection threshold of the clear channel assessment (i.e. CCA-PD).

[0152] For example, the fourth threshold can be determined according to the following formula (4):

[0153] OBSS_PD = PI2 - I STA + OBSS_PD min Formula (4)

[0154] wherein P I2 represents the second interference power, I STA represents the second threshold, and OBSS_PD min is determined according to CCA-PD, for example, OBSS_PD min may be equal to -82dBm.

[0155] In some embodiments, the first access point device sends first information to the second access point device, including:

[0156] At a starting position of the first transmission opportunity TXOP, the first access point device sends a first frame to the second access point device, the first frame including the first information.

[0157] Optionally, the first TXOP can be a TXOP for the first access point device and the second access point device to perform coordinated transmission.

[0158] Optionally, the first frame is a coordinated transmission frame, used to trigger the coordinated transmission between the first access point device and the second access point device.

[0159] In some embodiments, the coordinated transmission frame can be sent by the first access point device using a primary channel.

[0160] In some embodiments, after the first access point device sends the coordinated transmission frame, the second access point device can also send a coordinated response frame to the first access point device, wherein the coordinated response frame can be sent by the second access point device using the primary channel. Optionally, after the second access point device sends the coordinated response frame on the primary channel, the second access point device can switch to the NPCA primary channel for transmission, or perform a power reduction transmission using the primary channel.

[0161] In some embodiments, the first information can be carried in a user information field of the first frame.

[0162] For example, the user information field can include at least one of the following fields:

[0163] A first indication field, used to carry the first indication information, i.e., indicating the use of;

[0164] A third threshold field (or NPCA_PD threshold field), used to carry a third threshold.

[0165] A fourth threshold field (or OBSS_PD threshold field), used to carry a fourth threshold.

[0166] Optionally, the user information field of the first frame can include a spatial multiplexing parameter field, and the above fields can be included in the spatial multiplexing parameter field, Figure 11 A frame format of a first frame carrying first information is shown.

[0167] Optionally, the first frame can also include a resource unit (RU) allocation field used to allocate RU resources for the second access point device, for example, the second access point device can send a coordinated response frame through the RU resources.

[0168] Therefore, in the embodiments of the present application, before the TXOP for cooperative transmission, the first access point device can acquire the target interference power suffered on the target channel used by the first access point device and the first station device for transmission, and determine whether to instruct the second access point device to adjust the transmission scheme according to the target interference power and the maximum interference power acceptable by the receiving end device of the transmission, for example, in the case that the target interference power is greater than the maximum interference power acceptable by the receiving end device, instructing the second access point device to use the NPCA primary channel for transmission, or to transmit with power reduction on the primary channel, so as to realize the combination of multi-AP cooperative transmission and secondary channel access, and reduce the interference of multi-AP cooperative transmission on other transmissions.

[0169] Figure 12 is a schematic diagram of the transmission method 300 according to the embodiments of the present application, as shown in Figure 12 the method 300 includes at least part of the following contents:

[0170] S310, the second access point device receives first information of the first access point device, and the first information is used for the second access point device to start transmission using the NPCA primary channel, or to transmit with power reduction on the primary channel;

[0171] S320, the second access point device transmits using the NPCA primary channel, or transmits with power reduction on the primary channel.

[0172] Wherein, the specific implementation of the first access point device and the second access point device is referred to the related description in the method 200, which will not be repeated here.

[0173] In some embodiments of the present application, the transmission on the primary channel can include but is not limited to spatial multiplexing transmission on the primary channel, and the transmission with power reduction on the primary channel can include but is not limited to spatial multiplexing transmission with power reduction on the primary channel.

[0174] In some embodiments of the present application, the first information includes but is not limited to at least one of the following:

[0175] First indication information, the first indication information is used for instructing the second access point device to transmit using the NPCA primary channel;

[0176] Third threshold, used for the second access point device to determine whether to transmit using the NPCA primary channel;

[0177] Fourth threshold, used for the second access point device to determine the power to be reduced for transmission on the primary channel.

[0178] For example, the second access point device can start to transmit using the NPCA primary channel after receiving the first indication information, or transmit using the primary channel with power reduction, or transmit using the primary channel and the NPCA primary channel with power reduction.

[0179] Optionally, in a case that the second access point device supports channel access using the NPCA primary channel, the second access point device can transmit using the NPCA primary channel according to the first indication information, or transmit using the primary channel and the NPCA primary channel with power reduction; in a case that the second access point device does not support channel access using the NPCA primary channel, the second access point device can transmit using only the primary channel with power reduction according to the first indication information.

[0180] In some embodiments, the second access point device can determine the transmission scheme after transmitting using the NPCA primary channel according to the first indication information or transmitting on the primary channel with power reduction according to the third threshold, for example, using the first transmission scheme or using the second transmission scheme.

[0181] In some embodiments of the present disclosure, the method 300 further includes:

[0182] The second access point device measures the uplink signal sent by the first station device to obtain the third interference power on the primary channel of the second access point device;

[0183] According to the third interference power and the third threshold, the transmission scheme of the downlink transmission of the second access point device is determined.

[0184] For example, after the first access point device sends the first PPDU to the first station device, the first station device can send a response signal, for example, ACK, to the first access point device, and the second access point device can receive the response signal and perform measurement on the response signal to obtain the third interference power, wherein the channel used by the first station device to send the response signal overlaps with the primary channel of the second access point device. Further, the second access point device determines the transmission scheme used subsequently according to the third interference power. For example, when the interference level on the primary channel of the second access point device is low, the third transmission scheme is used for transmission, under which the second access point device transmits using the primary channel and the NPCA primary channel without power reduction, or when the interference level on the primary channel of the second access point device is high, the first transmission scheme or the second transmission scheme is used for transmission, or according to the transmission rate corresponding to the first transmission scheme and the transmission rate corresponding to the second transmission scheme, it is determined which transmission scheme is used for transmission.

[0185] In some embodiments, the determining, according to the third interference power and the third threshold, the transmission scheme of the second access point device for downlink transmission comprises:

[0186] In the case that the third interference power is less than or equal to the third threshold, the second access point device switches to use the primary channel and the NPCA primary channel for transmission; or

[0187] In the case that the third interference power is greater than the third threshold, the second access point device determines whether to use the first transmission scheme or the second transmission scheme for downlink transmission according to a transmission rate corresponding to the first transmission scheme and a transmission rate corresponding to the second transmission scheme.

[0188] In the first transmission scheme, the second access point device performs downlink transmission based on the NPCA primary channel, and a transmission power used by the second access point device for downlink transmission based on the NPCA primary channel is a first transmission power.

[0189] In the second transmission scheme, the second access point device switches to use the primary channel and the NPCA primary channel for downlink transmission, and a transmission power used by the second access point device for downlink transmission is a second transmission power.

[0190] In some embodiments, the second transmission power is less than the first transmission power. For example, the second transmission power is equal to the first transmission power minus a first power offset.

[0191] Optionally, the first power offset is determined according to a fourth threshold (i.e., OBSS_PD). For example, the first power offset is equal to OBSS_PD-OBSS_PD min . Optionally, OBSS_PD min is equal to -82 dB.

[0192] In some embodiments, the determining, according to the third interference power and the third threshold, the transmission scheme of the second access point device for downlink transmission comprises:

[0193] In the case that the transmission rate corresponding to the first transmission scheme is greater than the transmission rate corresponding to the second transmission scheme, the first transmission scheme is used for downlink transmission; or

[0194] In the case that the transmission rate corresponding to the first transmission scheme is less than the transmission rate corresponding to the second transmission scheme, the second transmission scheme is used for downlink transmission.

[0195] In some embodiments, the transmission rate corresponding to the first transmission scheme is determined according to a first MCS and a bandwidth of the NPCA primary channel of the second access point device, and the transmission rate corresponding to the second transmission scheme is determined according to a second MCS and a bandwidth of the primary channel and the NPCA primary channel of the second access point device, wherein the first MCS is a MCS corresponding to the PPDU transmitted by the second access point device based on the first transmission power, and the second MCS is a MCS corresponding to the PPDU transmitted by the second access point device based on the second transmission power.

[0196] For example, the bandwidth of the primary channel of the second access point device is 20MHz, the bandwidth of the NPCA primary channel is 20MHz, the first MCS is 7, and the first power offset is 5dB. In the case of reducing the transmission power by 5dB, the second MCS can be determined to be 4. The number of transmission bits and the code rate corresponding to the MCS of 7 are 7 and 5 / 6 respectively, and the number of transmission bits and the code rate corresponding to the MCS of 4 are 4 and 3 / 4 respectively. By substituting into the transmission rate calculation method (i.e. transmission rate = number of transmission bits * transmission code rate * number of data subcarriers * number of spatial streams * transmission time of carrier symbol, wherein it is assumed that the number of spatial streams and the transmission time of carrier symbol are the same), the ratio of the transmission rate corresponding to the first transmission scheme to the transmission rate corresponding to the second transmission scheme is as follows:

[0197]

[0198] As can be seen, the transmission rate corresponding to the second transmission scheme is higher than the transmission rate corresponding to the first transmission scheme. Therefore, the second access point device can select to use the second transmission scheme for transmission, i.e. to transmit in the power reduction mode on the primary channel and the NPCA primary channel. The reduced power can be 5dB.

[0199] The following specific examples shown in Figure 13 to Figure 18 explain the transmission method provided by the embodiments of the present application.

[0200] Figure 13 and Figure 16 Two topological diagrams suitable for the embodiments of the present application are shown, wherein the master AP can correspond to the first access point device, the slave AP can correspond to the second access point device, STA11 is an associated STA of the master AP, corresponding to the first station device, and STA21 is an associated STA of the slave AP.

[0201] In Figure 13 to Figure 15 the example, the master AP performs uplink transmission with STA11, and the slave AP performs downlink transmission, wherein the channel (i.e. the first channel) used by the master AP for uplink transmission overlaps with the primary channel of the slave AP.

[0202] In combination with Figure 14 andFigure 15 Explain the specific transmission process.

[0203] Step 1: The master AP measures the downlink signal sent by the slave AP to obtain the first interference power.

[0204] The downlink signal is transmitted from the AP using the main channel.

[0205] Optionally, the downlink signal can be a beacon frame.

[0206] Step 2: The main AP prepares to conduct uplink transmission with STA11 and determines the target received power and target MCS for this uplink transmission.

[0207] Step 3: The main AP determines the maximum acceptable interference power (i.e., the first threshold) at the uplink receiver (i.e., the main AP) based on the target received power and the target MCS. AP The specific determination method is described in the foregoing embodiments and will not be repeated here.

[0208] Optionally, the main AP can also determine a third or fourth threshold. The specific determination method is described in the relevant description of the foregoing embodiments, and will not be repeated here.

[0209] Step 4: The master AP sends a cooperative transmission frame to the slave AP.

[0210] For example, such as Figure 15 As shown, the master AP sends a cooperative transmission frame to the slave AP at the beginning of the first TXOP to trigger cooperative transmission between the master AP and the slave AP.

[0211] Optionally, the cooperative transmission frame is sent by the primary AP using the primary channel.

[0212] Optionally, the cooperative transmission frame may carry first information, wherein the first information includes at least one of the following:

[0213] The first indication information is used to indicate whether to transmit from the AP using the NPCA main channel or to transmit in a power-reduced manner on the main channel.

[0214] The third threshold;

[0215] The fourth threshold.

[0216] Correspondingly, the AP receives the cooperative transmission frame from the master AP to obtain the first information.

[0217] Step 5: Send a cooperation response frame from the AP to the master AP.

[0218] The cooperative response frame is sent from the AP using the main channel.

[0219] After sending the cooperative response frame from the AP, transmission can be switched to using the NPCA master channel, or transmission using the master channel in a reduced power mode.

[0220] Step 6: The master AP sends a trigger frame, which is used to trigger uplink transmission of the STA 11.

[0221] Step 7: The master AP receives the uplink PPDU sent by the STA 11.

[0222] For example, the master AP can receive the uplink PPDU of the STA 11 using the master channel. Since the slave AP switches to transmission using the NPCA master channel, or transmission in a reduced power mode on the master channel, interference of downlink transmission of the slave AP on uplink transmission of the master AP and the STA 11 is reduced.

[0223] In the example of Figure 16 to Figure 18 , the master AP performs downlink transmission with the STA 11, and the slave AP performs downlink transmission. The channel used for downlink transmission of the STA (i.e., the second channel) and the master channel of the slave AP overlap.

[0224] The specific transmission process is described in combination with Figure 17 and Figure 18 .

[0225] Step 1: The master AP acquires the second interference power. The acquisition manner of the second interference power is described in the foregoing embodiments, which is not described herein again for brevity.

[0226] Step 2: The master AP prepares for downlink transmission with the STA 11, and determines a target MCS of the downlink transmission.

[0227] Step 3: The master AP determines an acceptable maximum interference power (i.e., the second threshold) I STA of the receiving end (i.e., the STA 11 end) of the downlink transmission according to the target MCS. The specific determination manner is described in the foregoing embodiments, which is not described herein again for brevity.

[0228] Optionally, the master AP can also determine the third threshold or the fourth threshold. The specific determination manner is described in the foregoing embodiments, which is not described herein again for brevity.

[0229] Step 4: The master AP sends a cooperative transmission frame to the slave AP.

[0230] For example, as shown in Figure 17 , the master AP sends the cooperative transmission frame to the slave AP at the starting position of the first TXOP, which is used to trigger cooperative transmission between the master AP and the slave AP.

[0231] Optionally, the cooperative transmission frame is sent by the master AP using the master channel.

[0232] Optionally, the first information is carried in the cooperative transmission frame, wherein the first information comprises at least one of the following:

[0233] the first indication information is used to indicate that the slave AP transmits using the NPCA master channel, or transmits in a power-reduced manner on the master channel;

[0234] the third threshold;

[0235] the fourth threshold.

[0236] Correspondingly, the slave AP receives the cooperative transmission frame of the master AP to obtain the first information.

[0237] Step 5: the slave AP sends a cooperative response frame to the master AP.

[0238] Optionally, the cooperative response frame is sent by the slave AP using the master channel.

[0239] After the slave AP sends the cooperative response frame, the slave AP can switch to transmit using the NPCA master channel, or transmit in a power-reduced manner on the master channel.

[0240] Step 6: the master AP sends a downlink PPDU.

[0241] Optionally, the downlink PPDU is sent by the master AP using the master channel.

[0242] Step 7: STA11 sends an ACK to the master AP, wherein the ACK can be

[0243] Step 8: the slave AP receives the ACK on the master channel and measures the ACK to obtain a third interference power.

[0244] Step 9: the slave AP determines a transmission scheme used for subsequent transmission according to the third interference power and the third threshold.

[0245] For example, when the third interference threshold is less than the third threshold, it indicates that the slave AP transmits using the master channel does not affect the transmission between the master AP and STA11, and therefore the slave AP can switch to transmit using the master channel and the NPCA master channel.

[0246] For example, when the third interference threshold is greater than the third threshold, the first transmission scheme or the second transmission scheme can be directly used by the slave AP for transmission. For example, when the slave AP supports transmission using the NPCA primary channel, the first transmission scheme is used for transmission, and when the slave AP does not support transmission using the NPCA primary channel, the second transmission scheme is used for transmission. Alternatively, the slave AP can also select the target transmission scheme used for subsequent transmission according to the transmission rate corresponding to the first transmission scheme and the pair of transmission rates corresponding to the second transmission scheme. The specific determination manner is described above with reference to the foregoing embodiments, and is not described here for brevity.

[0247] In summary, in the embodiments of the present application, before the TXOP for cooperative transmission, the first access point device can obtain the target interference power suffered on the target channel used by the first access point device and the first station device for transmission, and determine whether to instruct the second access point device to adjust the transmission scheme according to the target interference power and the maximum interference power acceptable by the receiving end device of the transmission. For example, when the target interference power is greater than the maximum interference power acceptable by the receiving end device, the second access point device is instructed to use the NPCA primary channel for transmission, or to transmit with reduced power on the primary channel, thereby realizing the combination of multi-AP cooperative transmission and auxiliary channel access, and reducing the interference of multi-AP cooperative transmission on other transmissions.

[0248] The method embodiments of the present application are described in detail above in combination with Figure 9 to Figure 18 The device embodiments of the present application are described in detail below in combination with Figure 19 to Figure 22 It should be understood that the device embodiments correspond to the method embodiments, and similar descriptions can be referred to the method embodiments.

[0249] Figure 19 A schematic block diagram of a wireless communication device 500 according to an embodiment of the present application is shown. The wireless communication device 500 can be a first access point device, or a component in the first access point device, such as a chip, a circuit or a module, etc.

[0250] As Figure 19 shown, the wireless communication device 500 includes:

[0251] The processing module 510 is configured to obtain the target interference power suffered on the target channel, wherein the target channel is a channel used by the first access point device and the first station device for transmission, and the target channel overlaps with the primary channel of the second access point device.

[0252] The sending module 520 is configured to send first information to the second access point device, where the first information is used by the second access point device to start transmission using a non-primary channel access (NPCA) primary channel or to perform transmission in a power reduction manner on the primary channel, when the target interference power meets a preset condition.

[0253] In some embodiments, the processing module 510 is further configured to:

[0254] When the first access point device and the first station device perform uplink transmission, the first access point device acquires a first interference power suffered on a first channel, where the first channel is a channel used by the first access point device to receive uplink transmission of the first station device, the first interference power is interference power of downlink transmission of the second access point device on uplink reception on the first channel, and the first channel overlaps with a primary channel of the second access point device.

[0255] In some embodiments, the target interference power meeting the preset condition includes that the first interference power is greater than a first threshold, or the first interference power is greater than or equal to the first threshold.

[0256] In some embodiments, the first threshold is determined according to at least one of a first target received power, a target signal-to-noise ratio (SNR), and a safety power redundancy, where the first target received power is a target received power corresponding to uplink reception of the first access point device, the target SNR is determined according to a target modulation and coding scheme (MCS), and the target MCS is a MCS corresponding to uplink transmission between the first access point device and the first station device.

[0257] In some embodiments, the processing module 510 is further configured to:

[0258] When the first access point device and the first station device perform downlink transmission, the first access point device acquires a second interference power suffered on a second channel, where the second channel is a channel used by the first station device to receive downlink transmission of the first access point device, the second interference power is interference power of downlink transmission of the second access point device on downlink reception on the second channel, and the second channel overlaps with the primary channel of the second access point device.

[0259] In some embodiments, the target interference power meeting the preset condition includes that the second interference power is greater than a second threshold, or the second interference power is greater than or equal to the second threshold.

[0260] In some embodiments, the second threshold is determined according to a minimum received power at which the first station device receives a downlink transmission of the first access point device.

[0261] In some embodiments, the first information comprises at least one of:

[0262] first indication information, the first indication information being used to indicate that the second access point device uses a non-primary channel access (NPCA) primary channel for transmission;

[0263] a third threshold, used by the second access point device to determine whether to use the NPCA primary channel for transmission;

[0264] a fourth threshold, used by the second access point device to determine a power reduction required for transmission on the primary channel.

[0265] In some embodiments, the third threshold is determined according to the first threshold or the second threshold, the first threshold or the second threshold being an interference threshold at which the first access point device indicates that the second access point device uses the NPCA primary channel for transmission, or reduces power for transmission on the primary channel.

[0266] In some embodiments, the sending module 520 is further used to:

[0267] send a first frame to the second access point device at a starting position of the first transmission opportunity (TXOP), the first frame comprising the first information, wherein the first frame is used to trigger cooperative transmission between the first access point device and the second access point device.

[0268] In some embodiments, the NPCA primary channel of the second access point device does not overlap with a channel of the first access point device.

[0269] In some embodiments, the primary channel of the first access point device overlaps with a channel of the second access point device.

[0270] Optionally, in some embodiments, the sending module or the receiving module unit can be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing module can be one or more processors.

[0271] It should be understood that the apparatus 500 according to the embodiments of the present application can correspond to the first access point device in the method embodiments of the present application, and the above and other operations and / or functions of each unit in the apparatus 500 are respectively used to implement the corresponding procedures of the first access point device or the master AP in the embodiments, which will not be described herein again for brevity. Figure 9 to Figure 18 The corresponding procedures of the first access point device or the master AP in the embodiments, which will not be described herein again for brevity.

[0272] Figure 20is a schematic block diagram of another communication apparatus 600 according to an embodiment of the present application. The wireless communication apparatus 600 can be a second access point device, or a component (for example, a chip, a circuit, or a module) in the second access point device. Figure 20 The communication apparatus 600 includes:

[0273] The communication module 610 is configured to receive first information of a first access point device, the first information being used by the second access point device to start transmission using a non-primary channel access (NPCA) primary channel, or to transmit on the primary channel in a power reduction manner.

[0274] The second access point device transmits on the NPCA primary channel, or transmits on the primary channel in a power reduction manner.

[0275] In some embodiments, the first information includes at least one of:

[0276] First indication information, the first indication information being used to indicate that the second access point device transmits on the NPCA primary channel.

[0277] A third threshold, the third threshold being used by the second access point device to determine whether to transmit on the NPCA primary channel.

[0278] A fourth threshold, the fourth threshold being used by the second access point device to determine a power reduction required for transmission on the primary channel.

[0279] In some embodiments, the communication module 610 is further configured to:

[0280] The second access point device measures an uplink signal sent by a first station device to obtain a third interference power suffered by the primary channel of the second access point device, wherein the uplink signal is a response signal of the first station device to a first PPDU sent by the first access point device.

[0281] The apparatus 600 further includes:

[0282] A processing module configured to determine a transmission scheme of downlink transmission of the second access point device according to the third interference power and the third threshold.

[0283] In some embodiments, the processing module is further configured to:

[0284] In a case where the third interference power is less than or equal to the third threshold, switching to transmission on the primary channel and the NPCA primary channel; or

[0285] determining whether to use the first transmission scheme or the second transmission scheme for downlink transmission according to a transmission rate corresponding to the first transmission scheme and a transmission rate corresponding to the second transmission scheme, in a case where the third interference power is greater than the third threshold;

[0286] wherein, in the first transmission scheme, the second access point device performs downlink transmission based on the NPCA primary channel, and a transmission power used by the second access point device for downlink transmission based on the NPCA primary channel is a first transmission power;

[0287] in the second transmission scheme, the second access point device switches to perform downlink transmission using the primary channel and the NPCA primary channel, and a transmission power used by the second access point device for downlink transmission is a second transmission power, wherein the second transmission power is equal to the first transmission power minus a first power offset, and wherein the first power offset is determined according to the fourth threshold.

[0288] In some embodiments, the processing module is further configured to:

[0289] in a case where the transmission rate corresponding to the first transmission scheme is greater than the transmission rate corresponding to the second transmission scheme, use the first transmission scheme for downlink transmission; or

[0290] in a case where the transmission rate corresponding to the first transmission scheme is less than the transmission rate corresponding to the second transmission scheme, use the second transmission scheme for downlink transmission.

[0291] In some embodiments, the transmission rate corresponding to the first transmission scheme is determined according to a first modulation and coding scheme (MCS) and a bandwidth of the NPCA primary channel of the second access point device, and the transmission rate corresponding to the second transmission scheme is determined according to a second MCS and a bandwidth of the primary channel and the NPCA primary channel of the second access point device, wherein the first MCS is a MCS corresponding to a PPDU transmitted by the second access point device based on the first transmission power, and the second MCS is a MCS corresponding to a PPDU transmitted by the second access point device based on the second transmission power.

[0292] In some embodiments, the NPCA primary channel of the second access point device does not overlap with the channel of the first access point device.

[0293] In some embodiments, the primary channel of the first access point device overlaps with the channel of the second access point device.

[0294] Optionally, in some embodiments, the sending module or the receiving module can be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0295] It should be understood that the apparatus 600 according to the embodiments of the present application can correspond to the second access point device in the method embodiments of the present application, and the above and other operations and / or functions of each unit in the apparatus 600 are respectively used to achieve the corresponding procedures of the second access point device or the from-AP in the method embodiments shown in the present application. Figure 9 to Figure 18 For brevity, the above and other operations and / or functions of each unit in the apparatus 600 are not described again here.

[0296] Figure 21 is a schematic structural diagram of a communication device 700 according to an embodiment of the present application. Figure 21 The communication device 700 shown includes a processor 710, which can call and run a computer program from a memory to implement the method in the embodiments of the present application.

[0297] Optionally, as shown in Figure 21 The communication device 700 can also include a memory 720. The processor 710 can call and run a computer program from the memory 720 to implement the method in the embodiments of the present application. For example, when the communication device 700 is a first access point device, the processor 710 can call and run a computer program from the memory 720 to implement the steps of the method embodiments performed by the first access point device, and achieve the same technical effects. When the communication device 700 is a second access point device, the processor 710 can call and run a computer program from the memory 720 to implement the steps of the method embodiments performed by the second access point device, and achieve the same technical effects

[0298] Optionally, the memory 720 can be a separate device independent of the processor 710, or can be integrated in the processor 710.

[0299] Optionally, as shown in Figure 21 The communication device 700 can also include a transceiver 730, and the processor 710 can control the transceiver 730 to communicate with other devices, specifically, to send information or data to other devices, or receive information or data sent by other devices.

[0300] Optionally, the transceiver 730 can include a transmitter and a receiver. The transceiver 730 can further include an antenna, and the number of antennas can be one or more.

[0301] Figure 22 is a schematic structural diagram of a chip according to an embodiment of the present application. Figure 22 The chip 800 shown includes a processor 810, which can call and run a computer program from a memory to implement the method in the embodiments of the present application.

[0302] Optionally, as shown in Figure 22As shown, the chip 800 can further include a memory 820. The processor 810 can invoke and run a computer program from the memory 820 to implement the method in the embodiments of the present application.

[0303] Optionally, the memory 820 can be a separate device independent of the processor 810, or can be integrated in the processor 810.

[0304] Optionally, the chip 800 can further include an input interface 830. The processor 810 can control the input interface 830 to communicate with other devices or chips, for example, to obtain information or data sent by other devices or chips.

[0305] Optionally, the chip 800 can further include an output interface 840. The processor 810 can control the output interface 840 to communicate with other devices or chips, for example, to output information or data to other devices or chips.

[0306] Optionally, the chip can be applied to the first access point device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the first access point device in the various methods of the embodiments of the present application. For the sake of brevity, details are not repeated here.

[0307] Optionally, the chip can be applied to the second access point device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the second access point device in the various methods of the embodiments of the present application. For the sake of brevity, details are not repeated here.

[0308] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0309] It should be understood that the processor of the embodiments of the present application can be an integrated circuit chip with a processing capability of signals. In the implementation process, each step of the method embodiments described above can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware coding processor for execution, or a combination of hardware and software modules in the coding processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0310] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a random access memory (Random Access Memory, RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0311] It should be understood that the above-mentioned memory is exemplary but not limiting, for example, the memory in the embodiments of the present application can also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and the like. That is, the memory in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.

[0312] The embodiment of the present application further provides a readable storage medium, which has a computer program stored thereon, and the computer program is executed by a processor to realize each process of the method embodiment.

[0313] Optionally, the readable storage medium can be applied to the access point device in the embodiment of the present application, and the computer program enables the processor to execute the corresponding process realized by the access point device in the method embodiment of the present application, and details are not repeated here.

[0314] Optionally, the readable storage medium can be applied to the station device in the embodiment of the present application, and the computer program enables the processor to execute the corresponding process realized by the station device in the method embodiment of the present application, and details are not repeated here.

[0315] The embodiment of the present application further provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to realize each process of the method embodiment.

[0316] Optionally, the computer program product can be applied to the access point device in the embodiment of the present application, and the computer program enables the processor to execute the corresponding process realized by the access point device in the method embodiment of the present application, and details are not repeated here.

[0317] Optionally, the computer program product can be applied to the station device in the embodiment of the present application, and the computer program enables the processor to execute the corresponding process realized by the station device in the method embodiment of the present application, and details are not repeated here.

[0318] The embodiment of the present application further provides a computer program. The computer program is executed by a processor to realize each process of the method embodiment.

[0319] Optionally, the computer program can be applied to the access point device in the embodiment of the present application, and the computer program enables the processor to execute the corresponding process realized by the access point device in the method embodiment of the present application, and details are not repeated here.

[0320] Optionally, the computer program can be applied to the station device in the embodiment of the present application, and the computer program enables the processor to execute the corresponding process realized by the station device in the method embodiment of the present application, and details are not repeated here.

[0321] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0322] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0323] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0324] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0325] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0326] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0327] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A transmission method, characterized in that, include: The first access point device acquires the target interference power received on the target channel, wherein the target channel is the channel used by the first access point device and the first site device for transmission, and the target channel overlaps with the main channel of the second access point device; When the target interference power meets the preset conditions, the first access point device sends first information to the second access point device. The first information is used for the second access point device to enable transmission using a non-main channel to access the NPCA main channel, or to transmit using a power reduction method on the main channel.

2. The method according to claim 1, characterized in that, The first access point device acquires the target interference power received on the target channel, including: When the first access point device and the first site device are performing uplink transmission, the first access point device obtains the first interference power received on the first channel, wherein the first channel is the channel used by the first access point device to receive the uplink transmission of the first site device, the first interference power is the interference power of the downlink transmission of the second access point device on the uplink reception on the first channel, and the first channel overlaps with the main channel of the second access point device.

3. The method according to claim 2, characterized in that, The target interference power satisfies the preset conditions including: the first interference power is greater than a first threshold; or, the first interference power is greater than or equal to the first threshold.

4. The method according to claim 3, characterized in that, The first threshold is determined based on at least one of the first target received power, the target signal-to-noise ratio (SNR), and the safety power redundancy. The first target received power is the target received power corresponding to the uplink reception of the first access point device. The target SNR is determined based on the target modulation and demodulation scheme (MCS). The target MCS is the MCS corresponding to the uplink transmission between the first access point device and the first site device.

5. The method according to claim 1, characterized in that, The first access point device acquires the target interference power received on the target channel, including: When the first access point device and the first site device are performing downlink transmission, the first access point device obtains the second interference power received on the second channel, wherein the second channel is the channel used by the first site device to receive the downlink transmission of the first access point device, the second interference power is the interference power of the downlink transmission of the second access point device on the downlink reception on the second channel, and the second channel overlaps with the main channel of the second access point device.

6. The method according to claim 5, characterized in that, The target interference power meets the preset conditions including: the second interference power is greater than the second threshold; or, the second interference power is greater than or equal to the second threshold.

7. The method according to claim 6, characterized in that, The second threshold is determined based on the minimum received power of the downlink transmission received by the first site device from the first access point device.

8. The method according to any one of claims 1-7, characterized in that, The first information includes at least one of the following: The first indication information is used to instruct the second access point device to use a non-main channel to access the NPCA main channel for transmission. The third threshold is used by the second access point device to determine whether to use the NPCA main channel for transmission; The fourth threshold is used by the second access point device to determine the power reduction required for transmission on the main channel.

9. The method according to claim 8, characterized in that, The third threshold is determined based on the first threshold or the second threshold, which is an interference threshold by which the first access point device instructs the second access point device to use the NPCA main channel for transmission, or to transmit at reduced power on the main channel.

10. The method according to any one of claims 1-9, characterized in that, The first access point device sends first information to the second access point device, including: At the beginning of the first transmission opportunity TXOP, the first access point device sends a first frame to the second access point device. The first frame includes the first information, wherein the first frame is used to trigger cooperative transmission between the first access point device and the second access point device.

11. The method according to any one of claims 1-10, characterized in that, The NPCA main channel of the second access point device does not overlap with the channel of the first access point device.

12. The method according to any one of claims 1-11, characterized in that, The main channel of the first access point device overlaps with the channel of the second access point device.

13. A transmission method, characterized in that, include: The second access point device receives first information from the first access point device. The first information is used for the second access point device to enable transmission using a non-main channel to access the NPCA main channel, or to transmit using a power reduction method on the main channel. The second access point device uses the NPCA main channel for transmission, or transmits at reduced power on the main channel.

14. The method according to claim 13, characterized in that, The first information includes at least one of the following: The first indication information is used to instruct the second access point device to use a non-main channel to access the NPCA main channel for transmission. The third threshold is used by the second access point device to determine whether to use the NPCA main channel for transmission; The fourth threshold is used by the second access point device to determine the power reduction required for transmission on the main channel.

15. The method according to claim 14, characterized in that, After the first access point device sends the first physical layer protocol data unit (PPDU) to the first site device, the method further includes: The second access point device measures the uplink signal sent by the first site device to obtain the third interference power received on the main channel of the second access point device, wherein the uplink signal is the response signal of the first site device to the first PPDU; Based on the third interference power and the third threshold, the transmission scheme for downlink transmission of the second access point device is determined.

16. The method according to claim 15, characterized in that, The step of determining the downlink transmission scheme for the second access point device based on the third interference power and the third threshold includes: If the third interference power is less than or equal to the third threshold, the second access point device switches to using the main channel and the NPCA main channel for transmission; or If the third interference power is greater than the third threshold, the second access point device determines whether to use the first transmission scheme or the second transmission scheme for downlink transmission based on the transmission rate corresponding to the first transmission scheme and the transmission rate corresponding to the second transmission scheme. In the first transmission scheme, the second access point device performs downlink transmission based on the NPCA main channel, and the transmission power used by the second access point device for downlink transmission based on the NPCA main channel is the first transmission power. Under the second transmission scheme, the second access point device switches to using the main channel and the NPCA main channel for downlink transmission. The transmission power used by the second access point device for downlink transmission is the second transmission power, wherein the second transmission power is equal to the first transmission power minus the first power offset, wherein the first power offset is determined according to the fourth threshold.

17. The method according to claim 16, characterized in that, The second access point device determines whether to use the first transmission scheme or the second transmission scheme for downlink transmission based on the transmission rate corresponding to the first transmission scheme and the transmission rate corresponding to the second transmission scheme, including: When the transmission rate corresponding to the first transmission scheme is greater than the transmission rate corresponding to the second transmission scheme, the first transmission scheme shall be used for downlink transmission; or If the transmission rate corresponding to the first transmission scheme is less than the transmission rate corresponding to the second transmission scheme, the second transmission scheme shall be used for downlink transmission.

18. The method according to claim 16 or 17, characterized in that, The transmission rate corresponding to the first transmission scheme is determined based on the first modulation and demodulation scheme MCS and the bandwidth of the NPCA main channel of the second access point device. The transmission rate corresponding to the second transmission scheme is determined based on the second MCS and the bandwidth of the main channel and the NPCA main channel of the second access point device. The first MCS is the MCS corresponding to the PPDU transmitted by the second access point device based on the first transmit power, and the second MCS is the MCS corresponding to the PPDU transmitted by the second access point device based on the second transmit power.

19. The method according to any one of claims 13-18, characterized in that, The NPCA main channel of the second access point device does not overlap with the channel of the first access point device.

20. The method according to any one of claims 13-19, characterized in that, The main channel of the first access point device overlaps with the channel of the second access point device.

21. A communication device, characterized in that, include: The processing module is used to obtain the target interference power received on the target channel, wherein the target channel is the channel used by the first access point device and the first site device for transmission, and the target channel overlaps with the main channel of the second access point device; The transmitting module is used to send first information to the second access point device when the target interference power meets the preset conditions. The first information is used for the second access point device to enable transmission using a non-main channel to access the NPCA main channel, or to transmit using a power reduction method on the main channel.

22. A communication device, characterized in that, include: The communication module is used to receive first information from the first access point device, wherein the first information is used by the second access point device to enable transmission via a non-main channel to access the NPCA main channel, or to transmit via a power-reduced method on the main channel; and Transmission can be performed using the NPCA main channel, or by reducing the power of the transmission on the main channel.

23. A communication device, characterized in that, include: A processor and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to perform the method as claimed in any one of claims 1 to 12, or the method as claimed in any one of claims 13 to 20.

24. A chip, characterized in that, include: A processor for retrieving and running a computer program from memory, causing a device having the chip mounted to perform the method as claimed in any one of claims 1 to 12, or the method as claimed in any one of claims 13 to 20.

25. A readable storage medium, characterized in that, Used to store a computer program that causes a computer to perform the method as claimed in any one of claims 1 to 12, or the method as claimed in any one of claims 13 to 20.

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