CN116260537A

CN116260537A - Data message sending method and device and communication equipment

Info

Publication number: CN116260537A
Application number: CN202211740492.9A
Authority: CN
Inventors: 谈健冬
Original assignee: TP Link Technologies Co Ltd
Current assignee: TP Link Technologies Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-13

Abstract

The application is applicable to the technical field of communication, and provides a data message sending method, a device and communication equipment, which comprise the following steps: determining the signal strength from a first terminal to the first AP, wherein the first AP and the first terminal belong to a first BSS network; selecting a corresponding interference reduction strategy according to the signal strength from the first terminal to the first AP, wherein after the first AP responds to the interference reduction strategy, the first AP has lower interference to a wireless signal of a second terminal when sending a data message compared with the first AP responds to the interference reduction strategy, the BSS network to which the second terminal belongs is a second BSS network, and the second BSS network and the first BSS network belong to the same Mesh network; and sending the data message to the first terminal through a spatial multiplexing technology according to the selected interference reduction strategy. By the method, the packet loss rate of the second terminal can be reduced.

Description

Data message sending method and device and communication equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a data message sending method, a data message sending device, communication equipment and a computer readable storage medium.

Background

The 802.11 protocol suite has introduced a new version of the 802.11ax wireless protocol, marking the formal entry of wireless local area networks into the sixth generation wireless network technology (IEEE 802.11.Ax, wifi 6) era.

Aiming at the problem of low space utilization rate caused by a strict collision avoidance mechanism of an old-version WiFi protocol, the WiFi6 protocol provides a Spatial Reuse (SR) function, and the SR function allows a Base Service Set (BSS) with a relatively far space to simultaneously send wireless messages by modulating a clear channel assessment (Clear Channel Assessment, CCA) threshold and a transmitting power, so that the overall network capacity can be improved.

Spatial Reuse, while increasing the overall throughput of the network through Spatial multiplexing, can also cause inter-device wireless signal interference. When the radio signal interference ratio is large, a packet loss phenomenon occurs, thereby reducing throughput. As shown in fig. 1, when BSS2 satisfies the SR condition and the BSS2 performs spatial multiplexing, the terminal of BSS1 (the terminal of BSS1 in fig. 1 is a tablet device) is located far away, and the SR data message of the BSS2 interferes with the normal message of BSS1, and the terminal of the BSS1 will cause a data packet reception failure after being interfered.

For Mesh (Mesh) networks, different BSSs may be combined into a Mesh network, each BSS having an independent forward network (FH) to provide network services to its terminals. Although the Spatial Reuse technology can enable the FH between the Mesh internal networks to carry out Spatial multiplexing, the overall capacity of the network is improved, the phenomenon that the terminal is interfered and the data packet is received failure still exists when the Spatial Reuse technology is adopted.

Disclosure of Invention

The embodiment of the application provides a data message sending method, a data message sending device and communication equipment, which can solve the problem of higher packet loss rate when the data message is sent by adopting spatial multiplexing.

In a first aspect, an embodiment of the present application provides a data packet sending method, which is applied to a first wireless Access Point (AP), where the data packet sending method includes:

determining the signal strength from a first terminal to the first AP, wherein the first AP and the first terminal belong to a first Basic Service Set (BSS) network;

selecting a corresponding interference reduction strategy according to the signal strength from the first terminal to the first AP, wherein after the first AP responds to the interference reduction strategy, the first AP has lower interference to a wireless signal of a second terminal when sending a data message compared with the first AP responds to the interference reduction strategy, the BSS network to which the second terminal belongs is a second BSS network, and the second BSS network and the first BSS network belong to the same Mesh network;

and sending the data message to the first terminal through a spatial multiplexing technology according to the selected interference reduction strategy.

In a second aspect, an embodiment of the present application provides a data packet sending device, which is applied to a first wireless access point AP, including:

A signal strength determining module, configured to determine a signal strength from a first terminal to the first AP, where the first AP and the first terminal both belong to a first basic service set BSS network;

an interference reduction policy selection module, configured to select a corresponding interference reduction policy according to a signal strength from the first terminal to the first AP, where after the first AP responds to the interference reduction policy, the first AP has lower interference to a wireless signal of a second terminal when sending a data packet, compared with before the first AP responds to the interference reduction policy, where a BSS network to which the second terminal belongs is a second BSS network, and the second BSS network and the first BSS network belong to the same Mesh network;

and the data message sending module is used for sending the data message to the first terminal through a spatial multiplexing technology according to the selected interference reduction strategy.

In a third aspect, an embodiment of the present application provides a communications device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the method according to the first aspect when executing the computer program.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program which, when executed by a processor, implements a method according to the first aspect.

In a fifth aspect, embodiments of the present application provide a computer program product for causing a communication device to perform the method of the first aspect described above when the computer program product is run on the communication device.

Compared with the prior art, the embodiment of the application has the beneficial effects that:

in this embodiment of the present application, when the signal strength from the first terminal to the first AP is strong, the transmitting power of the first AP is properly reduced to perform spatial multiplexing, so that the communication quality between the first AP and the first terminal is not affected, but the smaller the transmitting power of the first AP is, the smaller the interference of the first AP to other terminals when transmitting a data packet is, so that the corresponding interference reduction strategy is selected according to the signal strength from the first terminal to the first AP, and the spatial multiplexing gain can be improved as much as possible while the interference is strictly limited. Meanwhile, after the first AP responds to the interference reduction policy, the first AP has lower interference to the wireless signal of the second terminal when transmitting the data packet, compared with before the first AP responds to the interference reduction policy, so that after the first AP selects a more accurate interference reduction policy to transmit the data packet, the interference to the wireless signal of the second terminal can be reduced, and the packet loss rate of the second terminal can be reduced. In addition, since the first BSS network to which the first AP belongs and the second BSS network to which the second terminal belongs belong to the same Mesh network, reducing the packet loss rate of the second terminal is equivalent to reducing the packet loss rate of the Mesh network.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic diagram of a larger interference occurring when two BSS networks provided in the prior art transmit data packets by using a spatial multiplexing technique;

FIG. 2 is a flowchart of a method for sending a data message according to an embodiment of the present application;

fig. 3 is a schematic diagram of information that needs to be collected by an AP according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a data message sending device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In addition, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise.

Embodiment one:

to achieve Spatial multiplexing, the Spatial Reuse needs to satisfy the following conditions:

(1) Within the same BSS, all WiFi6 devices (e.g., access Point (AP) and terminal (Station, STA)) associated with the BSS have the same BSS color (color), and the BSS colors of the WiFi6 devices within different BSSs are different, i.e., the BSS color is used as an identifier of the BSS network.

(2) The WiFi6 device declares its BSS Color in the preamble, ensuring that other WiFi6 devices can identify whether the received signal is its BSS (Self BSS) or an overlapping basic service set (Overlapping Basic Service Set, OBSS) signal in the preamble phase.

(3) If the energy of the OBSS signal received by the current WiFi6 equipment is lower than the threshold value customized by the Spatial Reuse (which is expressed by OBSS PD), the current WiFi6 equipment can terminate the demodulation of the OBSS signal and perform packet sending, so that the simultaneous packet sending of the data domain part is realized, and the aim of Spatial multiplexing is further achieved.

When the BSS in the Mesh uses the Spatial Reuse technology to perform Spatial multiplexing, if the interference of wireless signals between devices in different BSS networks is large, a packet loss phenomenon occurs. That is, although the Spatial Reuse technique increases the overall throughput of the network through Spatial multiplexing, the Spatial Reuse technique also decreases the overall throughput of the network after packet loss occurs due to large interference of wireless signals between devices.

In order to reduce the packet loss rate caused by Spatial Reuse technology adopted by BSS in Mesh, the embodiment of the application provides a data message sending method. In the data message sending method, when a first AP hopes to send a data message to a terminal (assumed to be a first terminal) belonging to a BSS network together with the first AP by adopting a spatial multiplexing technology, the first AP firstly determines the signal strength from the first terminal to the first AP, and then selects a corresponding interference reduction strategy according to the signal strength from the first terminal to the first AP.

The following describes a data message sending method provided in the embodiments of the present application with reference to the accompanying drawings.

Fig. 2 shows a flowchart of a data message sending method provided in an embodiment of the present application, where the data message sending method is applied to a first AP, and is described in detail as follows:

step S21, determining the signal intensity from the first terminal to the first AP, wherein the first AP and the first terminal belong to a first BSS network.

The first BSS network is a BSS network to which the first AP and the first terminal belong.

Wherein, when the signal strength from the first terminal to the first AP is larger, the distance from the first terminal to the first AP is indicated to be closer, otherwise, the distance from the first terminal to the first AP is indicated to be farther.

And S22, selecting a corresponding interference reduction strategy according to the signal intensity from the first terminal to the first AP, wherein after the first AP responds to the interference reduction strategy, the interference to the wireless signal of the second terminal is lower when the first AP sends a data message compared with the first AP responds to the interference reduction strategy, the BSS network to which the second terminal belongs is a second BSS network, and the second BSS network and the first BSS network belong to the same Mesh network.

Specifically, different signal strength ranges are preset to correspond to different interference reduction strategies, so that after the signal strength from the first terminal to the first AP is determined, the interference reduction strategy corresponding to the signal strength is determined according to the signal strength range corresponding to the signal strength.

In this embodiment of the present application, the first AP responding to the interference reduction policy refers to that the first AP performs a corresponding action according to the selected interference reduction policy, so as to reduce interference to a wireless signal of the second terminal when the first AP sends a data packet.

Step S23, according to the selected interference reduction strategy, the data message is sent to the first terminal through the space multiplexing technology.

In some embodiments, the step S22 includes:

if the signal strength from the first terminal to the first AP is greater than a preset first signal strength threshold, the selected interference reduction strategy is a strategy for reducing the transmitting power of the first AP.

In this embodiment, when the signal strength from the first terminal to the first AP is greater than a preset first signal strength threshold, it indicates that the distance between the first AP and the first terminal is relatively short, at this time, even if the transmission power of the first AP is reduced to perform spatial multiplexing, the communication quality between the first AP and the first terminal will not be affected, and the smaller the transmission power of the first AP, the smaller the interference of the first AP to other terminals when transmitting a data packet, thereby ensuring that spatial multiplexing has relatively large gain.

In some embodiments, the data message sending method provided in the embodiments of the present application further includes:

a1, receiving a signal table sent by a second AP, wherein the signal table comprises an MAC address of the second terminal, BSS color and second signal strength, the second signal strength is the signal strength from the second terminal to the second AP, and the second AP belongs to the second BSS network.

In this embodiment of the present application, backward transmission is performed between different BSSs of the same Mesh network through a BackHaul (BH) network, that is, each BSS network may broadcast its stored signal table to other BSS networks of the same Mesh network through the BH network. That is, in the embodiment of the present application, the first AP can receive, through the BH network, the signal table sent by the other APs belonging to the same Mesh network. For example, assuming that the Mesh network includes 3 different BSS networks, the first AP will receive the signal tables sent by the other two APs (i.e., the two second APs).

Specifically, the AP of each BSS network within the Mesh network collects the MAC address, BSS color, and signal strength (Received Signal Strength Indication, RSSI) of the terminal within its network, and stores the MAC address, BSS color, and signal strength in a signal table established by the AP. To facilitate differentiation from the subsequent first signal strengths, the RSSI of the terminals within their network collected by the respective APs is referred to herein as the second signal strength.

As shown in fig. 3, OBSS1 is a BSS network, and "STA1" represents a terminal in the OBSS1, and the information collected by the AP of the OBSS1 includes BSS color, RSSI, and MAC address, and records the information into a signal table, as shown in table 1.

Table 1:

in table 1, interference RSSI is the interference signal strength, which is the first signal strength obtained in the following step A2.

A2, determining a first signal strength according to the MAC address and the BSS color, wherein the first signal strength is the signal strength from the second terminal to the first AP.

In this embodiment of the present application, the first signal strength may be obtained by detecting, by the first AP, a Clear To Send (CTS) frame signal of the second terminal.

Since the WiFi6 devices in the same BSS network have the same BSS color, the corresponding terminal needs to be determined through two dimensions, i.e., the MAC address and the BSS color. In this embodiment of the present application, after determining the first signal strength corresponding to the MAC address and the BSS color, the first signal strength may be recorded to the corresponding position of the signal table where the MAC address and the BSS color are located according to each signal table received by the first AP.

A3, determining the rate of the data message sent by the second AP to the second terminal.

Specifically, after receiving a message sent by the second AP to the second terminal (i.e. receiving the OBSS network), the first AP parses the message to obtain the Rate (Rate) of the message.

A4, determining that the first AP needs to reduce power when transmitting the data message by adopting a space multiplexing technology according to the first signal strength, the second signal strength and the speed.

Specifically, after receiving a data packet sent by a second AP To a second terminal (i.e. receiving an OBSS network), the first AP analyzes a (Request To Send, RTS) in the data packet and a preamble of a data frame, obtains a MAC address and a BSS color of the terminal from the preambles of the RTS frame and the data frame, and calculates Interference RSSI (i.e. a first signal strength) corresponding To the MAC address and the BSS color according To the MAC address and the BSS color, respectively.

In some embodiments, the power that the first AP needs to reduce when transmitting the data packet using the spatial multiplexing technique is determined according to the following formula, where the power that needs to be reduced is expressed as a power reduction ratio in dB decibels:

Power Diff＝Interference RSSI+SNR(Rate)-RSSI。

where Power Diff is the Power reduction ratio in dB decibels, interference RSSI is the first signal strength, and SNR (Rate) is the signal-to-noise ratio required for demodulating a Rate-modulated wireless signal, where the unit of signal-to-noise ratio is dB decibels. The RSSI in the above formula is the second signal strength.

A5, generating the strategy for reducing the transmitting power of the first AP according to the power required to be reduced.

Specifically, since the strategy of reducing the transmission power of the first AP is generated according to the calculated power to be reduced, the first AP can learn that the power to be reduced is required according to the strategy of reducing the transmission power of the first AP.

In the embodiment of the present application, when calculating the Power that needs to be reduced when the first AP transmits the data packet by using the spatial multiplexing technology, the interference signal strength, the signal-to-noise ratio that is required for demodulating the radio signal modulated by the Rate, and the signal strength of the terminal inside the network are considered, and the magnitude of the transmitting Power affects these parameters, so the accuracy of the Power Diff obtained by calculation can be ensured by the above formula.

In some embodiments, in order To collect the signal strength, in this embodiment, when the device in the Mesh network is configured To Send the data packet, an increase (Request To Send, RTS) frame is required, that is, by forcing the terminal receiving the data packet To reply (Clear To Send, CTS) frame, so that the AP devices of other BSSs can learn the signal strength from the terminal To itself, where step A2 includes:

A21, after obtaining the request to send control frame RTS of the second AP, analyzing the RTS frame to obtain the MAC address of the receiving equipment included in the RTS frame.

Specifically, the first AP listens to the channel, and if it is monitored that the second AP sends an RTS frame, the RTS frame is parsed to obtain the MAC Address of the receiving device (i.e., the second terminal) from a Receiver Address (RA) field of the RTS frame.

A22, acquiring the signal strength of the CTS (clear to send) allowed control frame corresponding to the RTS frame.

Specifically, the first AP continues to monitor the channel, if it monitors a CTS frame returned by the receiving device based on the RTS frame, the first AP parses the signal strength from the CTS frame, and records the parsed signal strength as the interference signal strength of the receiving device.

A23, acquiring a data message which is monitored after the RTS frame of the second AP and sent to the second terminal, and analyzing BSS color from the monitored data message.

Specifically, after sending the RTS instruction, for example, after receiving the CTS frame sent by the second terminal, the second AP may continue to send the data packet in 802.11ax mode, where the first AP monitors the data packet sent by the second AP. Because the data message includes the BSS color of the BSS network where the second AP is located, the first AP can obtain the BSS color corresponding to the second AP by analyzing the data message.

A24, using the signal intensity of the CTS frame corresponding to the RTS frame as the first signal intensity corresponding to the MAC address and the BSS color.

Referring to table 1 above, after determining two dimensions of the MAC address and the BSS color, it can be determined to which row in table 1 the signal strength parsed from the CTS frame is recorded, that is, it can be determined to which MAC address and which BSS color the signal strength corresponds.

In the embodiment of the present application, since the RTS frame needs to be added when the device in the Mesh network is configured to send the data packet, the first AP can obtain the signal strength from the second terminal to the first AP by monitoring and analyzing the RTS frames sent by the APs in other BSS networks and by monitoring and analyzing the CTS frames returned by the terminals (i.e., the second terminal) in other BSS networks. In addition, since the signal strength from the terminal to the first AP is obtained by the first AP analyzing the CTS frame it listens to, the accuracy of the obtained signal strength can be ensured.

b1, determining channel state information (Channel State Information, CSI) of a downlink channel from the first AP to the first terminal.

Specifically, the first AP may transmit a Null Data Packet announcement (Null Data Packet Announcement, NDPA) frame and a Null Data Packet (NDP) using a spatial multiplexing technique to determine CSI of the first AP to the first terminal, so as to improve accuracy of the obtained CSI.

And B2, acquiring the CSI from the first AP to the second terminal to obtain second CSI.

Specifically, CSI of different terminals may be obtained and stored in advance, and at this time, CSI of the second terminal may be directly found in each stored CSI.

Correspondingly, the step S22 includes:

if the signal strength from the first terminal to the first AP is smaller than or equal to a preset first signal strength threshold and greater than a preset second signal strength threshold, the selected interference reduction strategy is an adaptive beamforming strategy, and the adaptive beamforming strategy is used for modulating the data message to be sent by the first AP according to the first CSI and the second CSI.

Specifically, assuming that the subscript "1" indicates a device belonging to the first BSS network and the subscript "2" indicates a device belonging to the second BSS network, the overall channel matrix is as follows:

H ₁ is the CSI channel information matrix of own equipment in the first BSS network, H ₂ Is a CSI channel information matrix of a node of an OBSS (i.e., second BSS) network, and then performs precoding by a least squares method, and the obtained precoding matrix is as follows:

When the internal node sends out packets, the data originally to be sent by the internal node is X ₁ The data after the self-adaptive beam forming needs to be modulated into the data through the precoding formula obtained above

The remaining 0's represent channel paths that do not transmit data to the OBSS node.

In this embodiment of the present application, when the distance between the first AP and the first terminal is neither near nor far (i.e., the signal strength from the first terminal to the first AP is neither large nor small), if the transmitting power of the first AP is directly reduced, the negotiation rate between the first AP and the first terminal may be affected, and if the data packet that needs to be sent by the first AP is modulated, the first AP may not affect other nodes as much as possible when sending the data packet by using the spatial multiplexing technology, thereby reducing interference to other nodes.

In some embodiments, the step S22 includes:

if the signal strength from the first terminal to the first AP is less than or equal to the second signal strength threshold, the selected interference reduction policy is an adaptive orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA) Resource Unit (RU) allocation policy, where the adaptive OFDMA RU allocation policy is used to find a target RU, and when the target RU is found, a narrowband OFDMA signal is sent on the target RU, where a ratio in dB of an average attenuation amplitude of subcarriers within the target RU by an average attenuation amplitude of all subcarriers of the second CSI is greater than that of the first AP when a spatial multiplexing technique is used to send a data packet (where the power to be reduced is expressed in dB).

Specifically, after receiving a data message sent by an OBSS network, a first AP acquires information of BSS color and terminal MAC addresses of the OBSS through an RTS frame and a preamble of the data frame of the data message, acquires CSI corresponding to the BSS color and the terminal MAC addresses in a signal table in which CSI is recorded, and finally searches for a target RU by using the following traversal algorithm, so as to improve accuracy of the searched target RU:

(1) an average attenuation amplitude of each subcarrier of the current CSI is calculated.

(2) The bandwidth size of RU is set to half of CSI.

(3) Traversing the RU with the full bandwidth size set.

(4) For each RU, calculating the average attenuation amplitude of the sub-carriers in the RU, dividing the average attenuation amplitude of each sub-carrier by CSI, converting the quotient into a logarithmic unit of dB, and if the result exceeds the Power required to be reduced (i.e., the Power Diff calculated in the logarithmic unit of dB) when the first AP transmits the data message by using the spatial multiplexing technique, considering that the current RU satisfies the condition, and ending the algorithm. Otherwise, continuing traversing.

(5) And (3) finishing the traversal, if the bandwidth size of the RU does not reach the lower limit specified by the protocol, indicating that the RU can be further divided, and at the moment, continuing to halve the bandwidth size of the RU, and executing the step (3). Otherwise, judging that the RU meeting the condition does not exist, and ending the traversal algorithm.

In this embodiment of the present application, after the average attenuation amplitude of the subcarriers of the second CSI in the target RU is compared with the average attenuation amplitude of each subcarrier of the second CSI, the obtained comparison result is greater than the power that needs to be reduced when the first AP transmits the data packet by using the spatial multiplexing technology, so that transmitting the narrowband OFDMA signal on the target RU can not only improve the range of the signal, but also interfere with other terminals when the first AP transmits the data packet, thereby being beneficial to reducing the packet loss rate of the Mesh network.

In some embodiments, the step B2 includes:

b21, sending a null packet announcement (Null Data Packet Announcement, NDPA) frame to the second terminal, wherein the source address of the NDPA frame is the MAC address of the second AP, and the destination address of the NDPA frame is the MAC address of the second terminal, and the second AP belongs to the second BSS network.

B22, transmitting a Null Data Packet (NDP) frame to the second terminal, wherein the BSS color (namely BSS color) of the physical layer preamble of the NDP frame is the same as the BSS color of the second AP.

B23, receiving compressed beam forming feedback (Compressed Beamforming Feedback, CBF) sent by the second terminal based on the NDPA frame and the NDP frame, and acquiring the CSI of the first AP to the second terminal from the CBF.

In this embodiment of the present application, according to a signal table provided by another BSS network, the first AP performing CSI acquisition periodically performs a Sounding procedure to a terminal (e.g., a second terminal) of the OBSS. Since both the source address and the destination address are spoofed, the first AP can collect CSI of the corresponding terminal.

Of course, after the second CSI is obtained, the second CSI may be recorded in a signal table corresponding to the second terminal stored in the first AP, so that when the CSI of the second terminal needs to be obtained, the second CSI may be directly found from the signal table according to the MAC address and BSS color obtained by the first AP.

It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.

Embodiment two:

corresponding to the data message sending method provided in the above embodiment, fig. 4 shows a block diagram of a data message sending device provided in the embodiment of the present application, and for convenience of explanation, only the portion relevant to the embodiment of the present application is shown.

Referring to fig. 4, the data packet transmission device 4 is applied to a first AP, and includes: a signal strength determining module 41, an interference reduction policy selecting module 42, and a data message transmitting module 43. Wherein:

The signal strength determining module 41 is configured to determine a signal strength from a first terminal to the first AP, where the first AP and the first terminal both belong to a first basic service set BSS network.

When the signal strength from the first terminal to the first AP is larger, the distance from the first AP to the first terminal is indicated to be closer, otherwise, the distance from the first AP to the first terminal is indicated to be farther.

The interference reduction policy selection module 42 is configured to select a corresponding interference reduction policy according to a signal strength from the first terminal to the first AP, where after the first AP responds to the interference reduction policy, it has lower interference to a wireless signal of the second terminal when sending the data packet, compared with before the first AP responds to the interference reduction policy, and the BSS network to which the second terminal belongs is a second BSS network, where the second BSS network and the first BSS network belong to the same Mesh network.

The data message sending module 43 is configured to send a data message to the first terminal through a spatial multiplexing technology according to the selected interference reduction policy.

In some embodiments, the interference reduction policy selection module 42 includes:

and the first interference reduction strategy selection unit is used for selecting an interference reduction strategy as a strategy for reducing the transmitting power of the first AP if the signal intensity from the first terminal to the first AP is greater than a preset first signal intensity threshold value.

In some embodiments, the data message sending apparatus 4 provided in the embodiments of the present application further includes:

and the signal table receiving module is used for receiving a signal table sent by a second AP, wherein the signal table comprises the MAC address of the second terminal, BSS color and second signal strength, the second signal strength is the signal strength from the second terminal to the second AP, and the second AP belongs to the second BSS network.

And the first signal strength determining module is used for determining first signal strength according to the MAC address and the BSS color, wherein the first signal strength is the signal strength from the second terminal to the first AP.

And the rate determining module is used for determining the rate of the data message sent by the second AP to the second terminal.

And the power calculation module to be reduced is used for determining the power required to be reduced when the first AP transmits the data message by adopting the space multiplexing technology according to the first signal strength, the second signal strength and the speed.

And the reduction strategy generation module is used for generating the strategy for reducing the transmitting power of the first AP according to the power required to be reduced.

In some embodiments, the first signal strength determining module includes:

and the request to send control frame acquisition unit is used for acquiring the request to send control frame RTS of the second AP, and then analyzing the RTS frame to obtain the MAC address of the receiving equipment included in the RTS frame.

And a signal strength acquisition unit for acquiring the signal strength of the transmission permission control frame CTS corresponding to the RTS frame.

And the BSS color analyzing unit is used for acquiring the data message which is monitored after the RTS frame of the second AP and is sent to the second terminal, and analyzing the BSS color from the monitored data message.

And a first signal strength acquiring unit configured to set a signal strength of the CTS frame corresponding to the RTS frame as a first signal strength corresponding to the MAC address and the BSS color.

and acquiring Channel State Information (CSI) of the second terminal.

And the channel state information acquisition module of the first AP is used for determining channel state information (Channel State Information, CSI) of a downlink channel from the first AP to the first terminal.

And the channel state information acquisition module of the terminal is used for acquiring the CSI from the first AP to the second terminal to obtain second CSI.

Correspondingly, the interference reduction policy selection module 42 includes:

the second interference reduction strategy selection unit is configured to select an interference reduction strategy as an adaptive beamforming strategy if the signal strength from the first terminal to the first AP is less than or equal to a preset first signal strength threshold and greater than a preset second signal strength threshold, where the adaptive beamforming strategy is used to modulate a data packet that needs to be sent by the first AP according to the first CSI and the second CSI.

a third interference reduction policy selection unit, configured to, if the signal strength from the first terminal to the first AP is less than or equal to the second signal strength threshold, select an interference reduction policy as a policy for allocation of adaptive OFDMA resource units RU, where the policy for allocation of adaptive OFDMA RU is used to search for a target RU, and send a narrowband OFDMA signal on the target RU when the target RU is found, where, after the average attenuation amplitude of subcarriers in the target RU by the second CSI is divided by the average attenuation amplitude of each subcarrier by the CSI of the second terminal, the obtained ratio in dB is greater than the power that needs to be reduced when the first AP sends a data packet by using spatial multiplexing technology (the power that needs to be reduced is expressed in dB).

In some embodiments, the channel state information obtaining module of the terminal includes:

and the null data packet notification sending unit is used for sending a null data packet notification NDPA frame to the second terminal, wherein the source address of the NDPA frame is the MAC address of the second AP, and the destination address of the NDPA frame is the MAC address of the second terminal, and the second AP belongs to the second BSS network.

And the null data packet sending unit is used for sending a Null Data Packet (NDP) frame to the second terminal, wherein the BSS color of the NDP frame is the same as that of the second AP.

And the compressed beam forming feedback receiving unit is used for receiving the compressed beam forming feedback CBF sent by the second terminal based on the NDPA frame and the NDP frame, and acquiring the CSI from the CBF from the first AP to the second terminal.

It should be noted that, because the content of information interaction and execution process between the above devices/units is based on the same concept as the method embodiment of the present application, specific functions and technical effects thereof may be referred to in the method embodiment section, and will not be described herein again.

Embodiment III:

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in fig. 5, the communication device 5 of this embodiment includes: at least one processor 50 (only one processor is shown in fig. 5), a memory 51 and a computer program 52 stored in the memory 51 and executable on the at least one processor 50, the processor 50 implementing the steps in any of the various method embodiments described above when executing the computer program 52.

The communication device 5 may be a computing device such as a router, a desktop computer, a notebook computer, a palm computer, and a cloud server. The communication device may include, but is not limited to, a processor 50, a memory 51. It will be appreciated by those skilled in the art that fig. 5 is merely an example of the communication device 5 and is not meant to be limiting as the communication device 5, and may include more or fewer components than shown, or may combine certain components, or may include different components, such as input-output devices, network access devices, etc.

The processor 50 may be a central processing unit (Central Processing Unit, CPU), the processor 50 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 51 may be an internal storage unit of the communication device 5, such as a hard disk or a memory of the communication device 5, in some embodiments. The memory 51 may also be an external storage device of the communication device 5 in other embodiments, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the communication device 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the communication device 5. The memory 51 is used for storing an operating system, an application program, a boot loader (BootLoader), data, other programs, and the like, such as program codes of the computer programs. The above-described memory 51 may also be used to temporarily store data that has been output or is to be output.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

The embodiment of the application also provides a network device, which comprises: at least one processor, a memory and a computer program stored in the memory and executable on the at least one processor, the processor implementing the steps in any of the various method embodiments described above when the computer program is executed by the processor.

The embodiments of the present application also provide a computer readable storage medium storing a computer program, where the computer program is executed by a processor to implement steps in each of the method embodiments described above.

Embodiments of the present application provide a computer program product which, when run on a communication device, causes the communication device to perform steps that may be performed in the various method embodiments described above.

The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application implements all or part of the flow of the method of the above embodiments, and may be implemented by a computer program to instruct related hardware, where the above computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. The computer program comprises computer program code, and the computer program code can be in a source code form, an object code form, an executable file or some intermediate form and the like. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing device/terminal apparatus, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (RAM, random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc. In some jurisdictions, computer readable media may not be electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other manners. For example, the apparatus/network device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. The data message sending method is characterized by being applied to a first wireless Access Point (AP), and comprises the following steps:

2. The method of sending a data message according to claim 1, wherein the selecting a corresponding interference reduction policy according to the signal strength of the first terminal to the first AP comprises:

and if the signal intensity from the first terminal to the first AP is greater than a preset first signal intensity threshold, the selected interference reduction strategy is a strategy for reducing the transmitting power of the first AP.

3. The data message transmission method as claimed in claim 2, further comprising:

receiving a signal table sent by a second AP, wherein the signal table comprises an MAC address of the second terminal, a BSS color and second signal strength, the second signal strength is the signal strength from the second terminal to the second AP, and the second AP belongs to a second BSS network;

Determining a first signal strength according to the MAC address and the BSS color, wherein the first signal strength is the signal strength from the second terminal to the first AP;

determining the rate of a data message sent by the second AP to the second terminal;

determining power to be reduced when the first AP transmits a data message by adopting a spatial multiplexing technology according to the first signal strength, the second signal strength and the rate;

and generating the strategy for reducing the transmitting power of the first AP according to the power required to be reduced.

4. The data message transmission method of claim 3, wherein said determining a first signal strength based on said MAC address and said BSS color comprises:

after obtaining a request to send control frame RTS of the second AP, analyzing the RTS frame to obtain the MAC address of receiving equipment included in the RTS frame;

acquiring the signal strength of a CTS (clear to send) of a control frame corresponding to the RTS frame;

acquiring a data message which is monitored after an RTS frame of the second AP and is sent to the second terminal, and analyzing BSS color from the monitored data message;

and taking the signal intensity of the CTS frame corresponding to the RTS frame as the first signal intensity corresponding to the MAC address and the BSS color.

5. The data message transmission method as claimed in claim 3, further comprising:

determining Channel State Information (CSI) of a downlink channel from the first AP to the first terminal to obtain first CSI;

acquiring the CSI from the first AP to the second terminal to obtain second CSI;

the selecting a corresponding interference reduction strategy according to the signal strength from the first terminal to the first AP includes:

if the signal intensity from the first terminal to the first AP is smaller than or equal to a preset first signal intensity threshold and larger than a preset second signal intensity threshold, the selected interference reduction strategy is an adaptive beamforming strategy, and the adaptive beamforming strategy is used for modulating a data message to be sent by the first AP according to the first CSI and the second CSI.

6. The method of sending a data message according to claim 5, wherein selecting a corresponding interference reduction strategy according to the signal strength of the first terminal to the first AP comprises:

if the signal intensity from the first terminal to the first AP is smaller than or equal to the second signal intensity threshold, the selected interference reduction strategy is a strategy of self-adaptive OFDMA resource unit RU allocation, the self-adaptive OFDMA RU allocation strategy is used for searching a target RU, and when the target RU is found, a narrowband OFDMA signal is sent on the target RU, where the ratio obtained by dividing the average attenuation amplitude of the subcarriers of the second CSI in the target RU by the average attenuation amplitude of all the subcarriers of the second CSI is greater than the power that the first AP needs to reduce when sending a data packet by using a spatial multiplexing technique.

7. The method of sending a data message according to claim 5, wherein the obtaining CSI from the first AP to the second terminal comprises:

sending a null data packet to the second terminal to announce an NDPA frame, wherein the source address of the NDPA frame is the MAC address of a second AP, and the destination address of the NDPA frame is the MAC address of the second terminal, and the second AP belongs to the second BSS network;

transmitting an empty data packet (NDP) frame to the second terminal, wherein the BSS color of the NDP frame is the same as the BSS color of the second AP;

and receiving a Compression Beamforming Feedback (CBF) sent by the second terminal based on the NDPA frame and the NDP frame, and acquiring the CSI from the first AP to the second terminal from the CBF.

8. A data message sending device, applied to a first wireless access point AP, comprising:

9. A communication device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 7 when executing the computer program.

10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the method according to any one of claims 1 to 7.