WO2017045439A1

WO2017045439A1 - Communication method, access point and station

Info

Publication number: WO2017045439A1
Application number: PCT/CN2016/084430
Authority: WO
Inventors: 马驰翔; 罗俊; 林英沛
Original assignee: 华为技术有限公司
Priority date: 2015-09-18
Filing date: 2016-06-02
Publication date: 2017-03-23
Also published as: CN106550377B; CN106550377A

Abstract

Provided are a communication method, an access point and a station. The communication method comprises: an access point monitoring a channel, and detecting the energy of the channel so as to obtain the receiving power of the channel; when a data packet received via the channel comes from basic service sets other than the basic service set where the access point is located, the access point comparing the receiving power, a first threshold value and a second threshold value, wherein the first threshold value is less than the second threshold value; and when the receiving power is greater than the first threshold value and less than the second threshold value, or the receiving power is equal to the first threshold value, or the receiving power is equal to the second threshold value, the access point sending a message via the channel, wherein the message comprises identification information about the BSS where the AP is located, and the message is used for informing at least one STA in the BSS where the AP is located of the case that the data packet can be sent via the channel. The embodiments of the present invention not only can increase a spatial multiplexing transmission chance, and improve the throughput of a system, but also can avoid the interference caused due to a large number of spatial multiplexing transmissions.

Description

Communication method, access point and site

The present application claims priority to Chinese Patent Application No. 201510599319.5, entitled "Communication Method, Access Point, and Site", filed on Sep. 18, 2015, the entire contents of in.

Technical field

The present invention relates to the field of communications, and more particularly to communication methods, access points, and stations.

Background technique

With the development of mobile Internet and the popularity of smart terminals, data traffic has shown an explosive growth trend. Wireless Local Area Network (WLAN) has become one of the mainstream mobile broadband access technologies with its advantages in high speed and low cost.

The existing 802.11ac-based WLAN system adopts Orthogonal Frequency Division Multiplexing (OFDM) modulation mode, and does not use spatial multiplexing in the Media Access Control (MAC) layer (Spatial Reuse, The mechanism referred to as SR) performs data transmission. Therefore, only one transmission link is allowed in a certain space.

Different from the 802.11ac system, the next-generation WLAN system will adopt more scheduling mechanisms, so that the Access Point (AP) has more control to schedule downlink transmission and uplink transmission. In order to improve the data transmission efficiency of the WLAN system, more links can be allowed to obtain transmission opportunities without affecting the correct reception of the existing transmission links. Therefore, how to design a method and mechanism for spatial multiplexing is a technical problem to be solved by the present invention.

Summary of the invention

The embodiments of the present invention provide a communication method, an access point, and a station, which can not only increase spatial multiplexing transmission opportunities, improve system throughput, but also avoid interference caused by a large amount of spatial multiplexing transmission.

In a first aspect, a communication method is provided, including: an access point listening channel, detecting channel energy to obtain received power of the channel; and when a data packet received through the channel is from the access point The access point compares the reception when other basic service sets are outside the basic service set a power, a first threshold, and a second threshold, wherein the first threshold is less than the second threshold; when the received power is greater than the first threshold and less than the second threshold, or the received power is equal to the When the first threshold is used, or the received power is equal to the second threshold, the access point sends a message by using the channel, where the message includes identifier information of a basic service set where the access point is located, the message At least one station for notifying the basic service set is capable of transmitting a data packet through the channel.

With reference to the first aspect, in a first possible implementation, the message further includes at least one of the following: a transmit power of the at least one site, the second threshold, and an interference allowed by the access point. the amount.

With reference to the first aspect or the first possible implementation manner, in a second possible implementation manner, the message further includes at least one of the following: an adjustment value of the transmit power of each of the sites and each of the The adjusted value of the second threshold of the station.

With reference to the first aspect, or the first or the second possible implementation manner, in a third possible implementation manner, before the sending, by the access point, the message is sent to the at least one site by using the channel, the communication method is further The method includes: the access point receiving spatial multiplexing capability information sent by each of the at least one site, where the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, The adjustment information of the transmission power and the adjustment information of the second threshold.

With reference to the third possible implementation manner, in a fourth possible implementation manner, before the access point receives the spatial multiplexing capability information sent by each of the at least one site, the communication method further The method includes: the access point sending a spatial multiplexing capability information reporting request to each of the sites.

With reference to the first aspect or any one of the foregoing possible implementation manners, in a fifth possible implementation manner, the message adopts a frame format of a spatial multiplexing trigger frame.

In combination with the first aspect or any of the foregoing possible implementation manners, in a sixth possible implementation manner, the message further includes resource allocation information of the at least one site.

A second aspect provides a communication method, including: receiving, by a station, a message sent by an access point, where the message includes identifier information of a basic service set in which the access point is located, where the message is based on the access point. Transmitting, by the comparison result of the received power of the channel, the first threshold, and the second threshold; when the basic service set indicated by the identifier information is the same basic service set as the basic service set of the site, the site is based on The message transmits a data packet to the access point over the channel.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the message is further included At least one of the following information of at least one of the base service sets: transmit power, the second threshold, and an interference margin allowed by the access point.

With reference to the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the basic service set indicated by the identifier information and the site are located When the basic service set is the same basic service set, the station sends a data packet to the access point by using the channel according to the message, including: the basic service set indicated by the identifier information and the site When the basic service set is the same basic service set, and the message further includes the resource allocation information of the site, the site uses the resource indicated by the resource allocation information to connect to the device according to the message. Incoming point to send a packet.

With reference to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the station sends data to the access point according to the message The packet includes: the station comparing the received power of the channel with the second threshold; when the received power is less than the second threshold, or the received power is equal to the second threshold, the station is The access point sends the data packet.

With reference to the second aspect or any one of the foregoing possible implementation manners of the second aspect, in a fourth possible implementation manner of the second aspect, the message further includes at least one of the following information of the station: The adjustment value and the adjustment value of the second threshold are adjusted.

With reference to the second aspect, or any one of the foregoing possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the sending, by the station, the data packet to the access point according to the message includes: Determining, by the station, an interference point allowed by an access point or a station of another basic service set; the station determining a transmission power, the transmission power being less than the interference margin, or the transmission power being equal to the interference margin; And the station sends a data packet to the access point by using the sending power according to the message according to the message.

With the second aspect or the foregoing possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, before the receiving the message sent by the access point, the communication method further includes: The station transmits spatial multiplexing capability information to the access point, where the spatial multiplexing capability information includes at least one of the following: a spatial multiplexing transmission, a maximum transmission power, transmission power adjustment information, and the second threshold. Adjustment information.

With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, before the station sends the spatial multiplexing capability information to the access point, the communication method further The method includes: receiving, by the station, a spatial multiplexing capability information reporting request sent by the access point.

With reference to the second aspect, or any one of the foregoing possible implementation manners of the second aspect, in the eighth possible implementation manner of the second aspect, the message adopts a frame format of a spatial multiplexing trigger frame.

A third aspect provides an access point, including: a listening unit, configured to listen to a channel, detect channel energy to obtain received power of the channel, and a processing unit, configured to receive data through the channel Comparing the received power, the first threshold, and the second threshold when the packet is from another basic service set other than the basic service set in which the access point is located, where the first threshold is smaller than the second threshold; And when the received power is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, The channel sends a message, where the message includes identification information of a basic service set in which the access point is located, and the message is used to notify at least one station in the basic service set to send a data packet through the channel.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the message further includes at least one of: a transmit power of the at least one site, the second threshold, and the access point Allowable interference margin.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the message further includes at least one of the following information: the transmit power of each of the stations The adjustment value and the adjustment value of the second threshold of each of the stations.

With the third aspect or the first or second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the receiving unit is further configured to: Receiving spatial multiplexing capability information sent by each of the at least one site before the channel sends the message to the at least one site, where the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximizing Transmission power, adjustment information of transmission power, and adjustment information of the second threshold.

In conjunction with the third possible implementation of the third aspect, in a fourth possible implementation manner of the third aspect, the sending unit is further configured to receive, at the receiving unit, each of the at least one site Before the spatial multiplexing capability information sent by the station, the spatial multiplexing capability information reporting request is sent to each of the sites.

With reference to the third aspect, or any one of the foregoing possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, the message adopts a frame format of a spatial multiplexing trigger frame.

With reference to the third aspect, or any one of the foregoing possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the message further includes a resource allocation information of the at least one site interest.

A fourth aspect provides a station, including: a receiving unit, configured to receive a message sent by an access point, where the message includes identifier information of a basic service set where the access point is located, where the message is the The ingress is sent according to the comparison result of the received power of the channel, the first threshold, and the second threshold; and the sending unit is configured to: when the basic service set indicated by the identifier information is the same as the basic service set where the site is located, And during the service set, sending, by the channel, the data packet to the access point according to the message received by the receiving unit.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the message further includes at least one of the following information of the at least one site in the basic service set: a transmit power, the second threshold, and a location The interference margin allowed by the access point.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the sending unit is specifically configured to: when the basic service indicated by the identifier information When the set is the same basic service set as the basic service set in which the site is located, and the message further includes the resource allocation information of the site, the resource indicated by the resource allocation information is used according to the message to the access point. Send a packet.

With reference to the fourth aspect, or the first or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the sending unit is specifically configured to: compare a received power and a channel of the channel Determining a second threshold; when the received power is less than the second threshold, or the received power is equal to the second threshold, sending the data packet to the access point.

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the message further includes at least one of the following information of the station: The adjustment value and the adjustment value of the second threshold are adjusted.

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the sending unit is specifically configured to: determine an access point of another basic service set Or the interference margin allowed by the station; determining the transmission power, the transmission power is less than the interference margin, or the transmission power is equal to the interference margin; and using the transmission power to pass the channel according to the message The access point sends a data packet.

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the sending unit is further configured to: send, by the receiving unit, an access point to send Before the message, the spatial multiplexing capability information is sent to the access point, where the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, and transmitting power. Rate adjustment information and adjustment information of the second threshold.

With reference to the sixth possible implementation manner of the foregoing aspect, in a seventh possible implementation manner of the fourth aspect, the receiving unit is further configured to: send, by the sending unit, the spatial multiplexing to the access point Before the capability information, the spatial multiplexing capability information reporting request sent by the access point is received.

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in the eighth possible implementation manner of the fourth aspect, the message adopts a frame format of a spatial multiplexing trigger frame.

Based on the foregoing technical solution, in the embodiment of the present invention, when the received data packet is from another BSS, when the received power of the channel is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or received by the AP. When the power is equal to the second threshold, sending a message to the STA not only increases the spatial multiplexing transmission opportunity, improves the system throughput, but also avoids interference caused by a large amount of spatial multiplexing transmission.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of an application scenario of a communication method according to an embodiment of the present invention.

2 is a schematic flow chart of a communication method according to an embodiment of the present invention.

3A is a schematic diagram of a spatial multiplexing trigger frame of a communication method in accordance with an embodiment of the present invention.

FIG. 3B is another schematic diagram of a spatial multiplexing trigger frame of a communication method according to an embodiment of the present invention.

3C is another schematic diagram of a spatial multiplexing trigger frame of a communication method in accordance with an embodiment of the present invention.

FIG. 4 is a schematic flowchart of a communication method according to another embodiment of the present invention.

FIG. 5 is a schematic diagram of a spatial multiplexing report frame of a communication method according to another embodiment of the present invention.

FIG. 6 is a schematic flowchart of a communication method according to another embodiment of the present invention.

7 is a schematic block diagram of an access point in accordance with an embodiment of the present invention.

Figure 8 is a schematic block diagram of a station in accordance with an embodiment of the present invention.

9 is a schematic block diagram of an access point in accordance with another embodiment of the present invention.

Figure 10 is a schematic block diagram of a station in accordance with another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

The embodiment of the present invention may be applied to a WLAN. The WLAN may be a BSS (Basic Service Set) including an access point (AP), for example, an infrastructure basic service set (Infrastructure BSS); The local area network (LAN) can also be a PBSS (Personal Basic Service Set) that does not include an access point AP. In this case, a normal STA (Station) in the PBSS can assume the role of a network controller. In the embodiment of the present invention, the PBSS established by the network controller and the BSS established by the AP are not distinguished, and are collectively referred to as a BSS.

It should be understood that the technical solution of the present invention can also be applied to other wireless communication systems, for example, other systems of TDMA (Time Division Multiple Access) networks, GSM (Global System of Mobile communication) systems, and CDMA. (Code Division Multiple Access) system, WCDMA (Wideband Code Division Multiple Access) system, GPRS (General Packet Radio Service), LTE (Long Term Evolution, long term) The LTE-A (Advanced Long Term Evolution) system, the UMTS (Universal Mobile Telecommunication System), and the like are not limited in this embodiment of the present invention, but the present invention is convenient for description. The embodiment will be described by taking a wireless local area network as an example.

An AP may also be referred to as a wireless access point or bridge or hotspot or base station, etc., which may access a server or communication network.

The STA may be a wireless sensor, a wireless communication terminal, or a mobile terminal, such as a mobile phone (or "cellular" phone) that supports WiFi communication function and a computer with wireless communication function, for example, may be a portable, pocket-sized device that supports WiFi communication function. , handheld, computer built-in or in-vehicle wireless communication devices that exchange voice and/or data with a wireless access network.

FIG. 1 is a schematic diagram of a WLAN deployment scenario applicable to an embodiment of the present invention. The WLAN deployment scenario shown in Figure 1 includes AP1, AP2, and AP3, and multiple STAs. Exemplarily, in the scenario shown in FIG. 1, AP1 communicates with STA11, STA12, STA13, and STA14, respectively. AP2 communicates with STA21, STA22, STA23, and STA24, respectively, and P3 communicates with STA31, STA32, and STA33, respectively. Optionally, AP1, AP2, and AP3 can be devices supporting the 802.11ax standard, and can be backward compatible with multiple WLAN systems such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

2 is a schematic flow diagram of a communication method 200 in accordance with an embodiment of the present invention. The communication method 200 may be performed by an AP, or may be performed by an STA that functions as a network controller in a PBSS that does not include an AP, which is not limited by the embodiment of the present invention. For the convenience of description, in the embodiment of the present invention, only the AP is taken as an example for description. As shown in FIG. 2, the communication method 200 can include:

210. The AP listens to the channel, and detects channel energy to obtain a received power of the channel.

The AP compares the received power, the first threshold, and the second threshold, where the first threshold is less than the second threshold, when the data packet received by the channel is from a BSS other than the BSS where the AP is located;

230. When the received power is greater than the first threshold and is lower than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, the AP sends a message by using the channel, where the message includes the AP. The identification information of the BSS is used to notify at least one STA in the BSS where the AP is located to send a data packet through the channel.

The frame format of the Trigger Frame for Spatial Reuse (TF-SR) is used for the message. However, the present invention is not limited thereto, and the message may also adopt other frame formats.

The specific manner in which the AP sends the message is not limited in the embodiment of the present invention. For example, the AP may send the message in a manner commonly used in the prior art.

When the AP sends the message through the channel, the STA in the BSS where the AP is located and the STA in the other BSS can receive the message. Since the message carries the BSS identification information, the STA in the other BSS receives the message. The STA does not respond to the message, and the STA in the BSS where the AP is located can send a packet to the AP according to the message.

The first threshold may be equivalent to a threshold of a Clear Channel Assessment (CCA) in the prior art. In the prior art, when the received power of the channel is greater than the threshold of the CCA, the channel is considered to be busy; when the received power of the channel is less than the threshold of the CCA, the channel is considered to be idle, and the AP may trigger the STA to send the uplink data. In the embodiment of the present invention, when the received power of the channel is greater than the first threshold and is less than the second threshold, or equal to the first threshold, or equal to the second threshold, the AP may trigger the STA to perform uplink spatial multiplexing (Spatial Reuse, SR for short). Pass lose.

It should be noted that the first threshold is not limited to the same threshold as the CCA in the prior art, and the first threshold may also be greater than the threshold of the CCA in the prior art. That is, the first threshold may be greater than or equal to the threshold of the CCA in the prior art.

When the first threshold is equal to the threshold of the CCA in the prior art, if the received power of the channel is less than the first threshold, the channel is considered to be idle, and the AP may occupy the channel to send data. The specific process may refer to the implementation of the prior art. The way is not repeated here.

The second threshold may be considered as a trigger condition for whether the channel allows spatial multiplexing. When the received power is less than the second threshold, the channel may trigger spatial multiplexing transmission.

Optionally, when the received power of the channel is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, the AP may further send the data packet to the at least one STA to implement the downlink. Spatial multiplexing transmission.

In the embodiment of the present invention, when the AP determines that the received power of the channel is greater than the first threshold and is less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, the channel is considered to be allowed to implement spatial multiplexing transmission. Therefore, the AP sends a message to the STA to trigger the STA to send a data packet to implement spatial multiplexing transmission.

It should be understood that if the received power of the channel is greater than the second threshold, the BSS where the AP is located will not be able to occupy the channel transmission data, and the AP will continue to listen to the channel.

In the embodiment of the present invention, the uplink spatial multiplexing transmission is controlled by the AP, and interference between a large number of uplink spatial multiplexing transmissions can be avoided.

In the embodiment of the present invention, when the received data packet is from another BSS, when the received power of the channel is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the first When the threshold is two, sending a message to the STA not only increases the spatial multiplexing transmission opportunity, improves the system throughput, but also avoids interference caused by a large amount of spatial multiplexing transmission.

It should be noted that the communication method 200 may further include: the AP receives a data packet that is sent by each STA of the at least one STA according to the message; or, the AP receives a data packet that is sent by a part of the STAs of the at least one STA according to the message. And receiving a data packet delayed by the remaining part of the at least one STA.

For example, after the at least one STA receives the message, if all the STAs send a data packet to the AP according to the message, the AP may receive the data packet sent by each STA of the at least one STA; If some STAs determine that the data packet cannot be sent to the AP temporarily according to the received power of the channel or the interference margin of the AP or the STA of the other BSS, the STA will continue to wait for the AP to send the message, that is, the part of the STA sends the AP to the AP. Delay sending packets.

Optionally, the message may further include at least one of the following: a transmit power of the at least one STA, a second threshold, and an interference margin allowed by the AP.

For example, if the AP detects the channel and finds that other links exist, the message sent by the AP may include at least one of the following information: the transmit power of the at least one STA, and the second threshold. If the AP detects that there is no other link after listening to the channel, the message sent by the AP may include at least one of the following information: the transmit power of the at least one STA, the second threshold, and the interference margin allowed by the AP.

The STAs in other BSSs can determine the transmit power when transmitting data packets based on the interference margin allowed by the AP.

Optionally, the message may include at least one of the following: an adjustment value of the transmission power of each STA and an adjustment value of the second threshold of each STA.

Optionally, the message may further include a first threshold of the at least one STA and/or an adjustment value of the first threshold of each STA.

Optionally, the message may further include resource allocation information of the at least one STA, so that the at least one STA sends the data packet by using the resource indicated by the resource allocation information. However, in the embodiment of the present invention, the resource allocation information is not limited to be carried in the message, and the AP may further send the resource allocation information to at least one STA in the BSS where the AP is located by using other methods.

3A, 3B, and 3C are schematic diagrams of a spatial multiplexing trigger frame (TF-SR) according to an embodiment of the present invention. As shown in FIG. 3A, FIG. 3B and FIG. 3C, the TF-SR may include:

Frame Control (FC) field: The subtype value in the FC field can be set to a value that has not been used in the standard;

Duration field: The duration may be set to the sum of the duration of the subsequent data transmission and the Short Interframe Space (SIFS);

The receiving node address field is represented by (A1) in the figure. Since the receiving node may be one or more, the receiving node address field is optional, that is, the spatial multiplexing trigger frame may not include the receiving node. Address field, "()" indicates that A1 is optional;

Send node address field: indicated by A2 in the figure;

Common Info field: may include public information of multiple STAs in the BSS;

Per User Info field: includes information for each STA;

Frame Check Sequence (FCS): Used to verify the correctness of the data packet.

For example, as shown in FIG. 3A, FIG. 3B and FIG. 3C, the common information field in the spatial multiplexing trigger frame may include at least one of the following: the transmit power of the at least one STA, the second threshold, and the interference allowed by the AP. margin. The user information field in the trigger frame may include at least one of the following: an adjustment value of the transmission power of each STA and an adjustment value of the second threshold.

In addition, a TF type indication may also be included in the TF-SR. As shown in FIG. 3A, the TF type indication may be set in the common information field, but the embodiment of the present invention does not limit this. For example, as shown in FIG. 3B, the TF type indication can also be set in the FC field. As another example, as shown in FIG. 3C, the TF type indication can also be set in the newly added field. The TF type indication may indicate the TF-SR with 4 bits, such as 0001, and other values may be reserved.

It is to be noted that FIG. 3 is merely illustrative and should not be construed as limiting the embodiments of the present invention.

Optionally, before the step 230, the communication method 200 may further include: the AP receiving the SR capability information sent by each STA of the at least one STA, where the SR capability information includes at least one of the following information: allowing the SR transmission, the maximum transmission power, The adjustment information of the transmission power and the adjustment information of the second threshold.

The adjustment information of the transmission power may be used to indicate whether to allow adjustment of the transmission power, or to indicate how to adjust the transmission power, for example, to increase or decrease the transmission power. The adjustment information of the second threshold may be used to indicate whether the second threshold is allowed to be adjusted, or to indicate how to adjust the second threshold, for example, to increase or decrease the second threshold.

The adjustment information of the maximum transmission power, the transmission power, and the adjustment information of the second threshold may be determined by the STA according to the interference margin allowed by the AP or STA of the other BSS.

It should be noted that the SR capability information sent by the STA may be SR capability information for the current channel, or may be SR capability information for multiple channels. When the STA transmits SR capability information for multiple channels, it is necessary to carry channel number information in the SR capability information for each channel.

It should be understood that each STA may actively send the SR capability information to the AP, or may also be configured by the AP to report the SR capability information. For example, before the AP receives the SR capability information sent by each STA of the at least one STA, the communication method 200 further includes: the AP sends an SR capability information report request to each STA.

When the SR capability information includes the adjustment information of the maximum transmission power and the transmission power, the AP may adjust the maximum transmission power of the STA according to the adjustment information of the transmission power. When the SR capability information includes the adjustment information of the second threshold, the AP may perform the second The adjustment information of the threshold adjusts the second threshold.

When the SR capability information includes the transmission of the transmission power, the AP can adjust the transmission power of the STA according to the requirement, and carry the adjusted transmission power to the STA in the message.

It should be noted that the SR capability information may also include not allowing the SR transmission, in which case the AP does not send a message to the STA.

In the embodiment of the present invention, when the received data packet is from another BSS, when the received power of the channel is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the first When the threshold is two, sending a message to the STA can not only increase spatial multiplexing transmission opportunities, improve system throughput, but also avoid interference between a large number of spatial multiplexing transmissions.

4 is a schematic flow diagram of a communication method 400 in accordance with another embodiment of the present invention. The communication method 400 corresponds to the communication method 200, and a detailed description will be appropriately omitted herein in order to avoid redundancy. As shown in FIG. 4, the communication method 400 can include the following.

The STA receives the message sent by the AP, where the message includes the identifier information of the BSS where the AP is located, and the message is sent by the AP according to the comparison result of the received power of the channel, the first threshold, and the second threshold.

420. When the BSS indicated by the identifier information and the BSS where the STA is located are the same BSS, the STA sends a data packet to the AP through the channel according to the message.

The message can be in the frame format of the TF-SR.

In the embodiment of the present invention, the STA sends a data packet to the AP according to the message sent by the AP according to the received power of the channel, the first threshold, and the second threshold, which can implement spatial multiplexing transmission, thereby improving system throughput.

In addition, in the embodiment of the present invention, the uplink spatial multiplexing transmission is controlled by the AP, which can avoid interference between a large number of uplink spatial multiplexing transmissions.

It should be noted that, in step 420, the STA may: immediately send a data packet to the AP according to the message; or, the STA delays sending the data packet to the AP according to the message.

Optionally, the message may include at least one of the following information of the at least one STA in the BSS: the transmit power, the interference margin allowed by the AP, and the second threshold.

For example, the public information field in the TF-SR includes at least one of the following information: transmission power, AP Allowable interference margin and second threshold. Specifically, the field in which the second threshold is located in the common information field is used to determine whether the channel is capable of SR transmission.

Optionally, the step 420 may include: when the BSS indicated by the identifier information and the BSS where the STA is located are the same BSS, and the message further includes the resource allocation information of the STA, the STA uses the resource indicated by the resource allocation information to pass the channel according to the message. Send a packet to the AP.

Optionally, the sending, by the STA, the data packet to the AP by using the channel according to the message may include:

The STA compares the received power of the channel with a second threshold;

When the received power is less than the second threshold, or the received power is equal to the second threshold, the STA sends a data packet to the AP through the channel according to the message.

When the received power is greater than the first threshold and less than the second threshold, or the received power is equal to the second threshold; or the received power is equal to the first threshold, the STA uses the uplink spatial multiplexing transmission mode to send data to the AP; When the received power is smaller than the threshold of the CCA in the prior art, the channel is considered to be idle, and the STA transmits the data packet to the AP by using a conventional transmission manner.

In addition, when the received power is greater than the second threshold in the message, or the received power is equal to the second threshold, the antenna is continuously waited for the AP to send the message again, that is, the data packet is delayed to be sent to the AP.

In the embodiment of the present invention, after receiving the message, the STA needs to compare the received power of the channel with the second threshold, and controls the timing of transmitting the data packet to the AP or the transmission mode adopted according to the comparison result. In the embodiment of the present invention, the STA sends a data packet to the AP when the received power of the channel is less than or equal to the second threshold, so that interference caused by a large amount of spatial multiplexing transmission can be avoided.

The method for obtaining the second threshold by the STA in the embodiment of the present invention is not limited. The STA may obtain the second threshold from the message sent by the AP, and the STA may further acquire the second threshold by using other methods. For example, the second threshold may be pre-configured in the STA. Similarly, the method for the STA to obtain the first threshold is similar, and details are not described herein again.

Optionally, the message may include at least one of the following information of the STA: an adjustment value of the transmission power and an adjustment value of the second threshold.

For example, as shown in FIG. 3, the Per User Info field in the TF-SR includes at least one of the following: an adjustment value of the transmission power of each STA and an adjustment value of the threshold.

After receiving the message, each STA adjusts the local transmission power according to the adjustment value of the transmission power, and adjusts the local second threshold according to the adjustment value of the second threshold.

When the common information field in the TF-SR includes the transmission power of the at least one STA, and the user information field includes the adjustment value of the transmission power of the STA, the STA adjusts according to the adjustment value of the transmission power. The entire transmission power. Similarly, when the common information field of the TF-SR includes the second threshold, and the user information field includes the adjustment value of the second threshold, the STA adjusts the second threshold according to the adjusted value of the second threshold.

Optionally, the message may further include an adjustment value of the first threshold and/or the first threshold. Correspondingly, the STA may also adjust the first threshold according to the adjustment value of the first threshold.

Optionally, the STA sends the data packet to the AP according to the message, including:

The STA determines the interference margin allowed by the AP or STA of the other BSS;

The STA determines the transmission power, the transmission power is less than the interference margin, or the transmission power is equal to the interference margin;

The STA uses the transmission power to send a data packet to the AP through the channel according to the message.

The transmit power may be preset in the STA, or may be determined according to the transmit power in the message. For example, the transmit power in the message may be the maximum transmit power allowed by the STA, and the STA may determine the transmit power according to the interference margin allowed by the AP or STA of the other BSS and the maximum transmit power.

For example, the STA may downgrade the transmit power by x dB relative to the maximum transmit power, ie, the maximum transmit power -x; accordingly, the STA may increase the threshold CCA_SR by w*x dB, ie, CCA_SR+w*x, where w is preset The value can be, for example, 1.

Optionally, when the transmit power of the STA cannot be adjusted to be smaller than the interference margin allowed by the AP or the STA of the other BSS, the STA will continue to wait for the AP to send the message again, that is, delay sending the data packet to the AP.

Optionally, if there are multiple other BSSs, the STA sends the data packet to the AP to adopt a transmission power that is less than or equal to a minimum interference margin among the interference margins allowed by all APs or STAs of the multiple other BSSs.

Optionally, in step 410, the communication method 400 may further include: the STA sends the SR capability information to the AP, where the SR capability information includes at least one of the following information: the SR transmission, the maximum transmission power, the adjustment information of the transmission power, and the second threshold. Adjustment information.

The maximum transmit power may be the maximum transmit power that the STA can support, or may be the maximum transmit power determined by the STA according to the interference margin allowed by the AP or the STA of the other BSS, that is, the link that does not interfere with other BSSs. The maximum transmit power allowed in the case.

It should be noted that the SR capability information sent by the STA may be SR capability information for the current channel, or may be SR capability information for multiple channels. When the STA sends more than one When the SR capability information of the channel is required, the channel number information needs to be carried in the SR capability information for each channel.

The SR capability information can be carried in an SR report frame. FIG. 5 is a schematic diagram of a frame format of an SR report frame. For the corresponding description of the fields in the frame format shown in FIG. 5, reference may be made to the contents of the foregoing FIG. 3A, FIG. 3B, and FIG. 3C. To avoid repetition, details are not described herein again.

Optionally, before the STA sends the SR capability information to the AP, the communication method 400 may further include: receiving an SR capability report request sent by the AP.

That is, the STA can report the SR capability information to the AP by itself, or the STA can report the SR capability information according to the SR capability report sent by the AP.

In the embodiment of the present invention, the STA sends a data packet to the AP according to the received power of the channel according to the received power of the channel, the first threshold, and the second threshold, so that the uplink spatial multiplexing transmission can be implemented, thereby improving system throughput and enabling Avoid interference between a large amount of uplink spatial multiplexing transmissions.

A communication method according to an embodiment of the present invention will be described below with reference to FIG. FIG. 6 is a schematic flow diagram of a communication method 600 in accordance with an embodiment of the present invention. As shown in FIG. 6, the communication method 600 includes:

610. The AP listens to the channel and detects channel energy to obtain the received power of the channel.

620. The AP determines whether the received power is greater than the first threshold and is less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, and whether the received data packet is from another BSS.

630. The AP sends a TF-SR to at least one STA in the BSS where the AP is located.

It should be understood that only one STA is described in FIG. 6 as an example.

640. At least one STA receives the TF-SR.

650. Each STA of the at least one STA sends a data packet to the AP according to the TF-SR, and performs uplink SR transmission.

Optionally, the sending, by the STA, the data packet to the AP according to the TF-SR may include: the STA compares the received power of the channel with the second threshold; when the received power is less than the second threshold, or the received power is equal to the second threshold, the STA is configured according to the TF- The SR sends a packet to the AP.

Optionally, the sending, by the STA, the data packet to the AP according to the TF-SR may further include: the STA determines an interference margin allowed by the AP or the STA of the other BSS; and the STA determines the sending power, where the sending power is less than the interference margin, or the sending power. It is equal to the interference margin; according to the TF-SR, the transmission power is used to send a data packet to the AP.

Optionally, the sending, by the STA, the data packet to the AP according to the TF-SR may further include: when the STA determines that the received power is less than or equal to the second threshold, and the sending power is less than or equal to the interference margin allowed by the AP or the STA of the other BSS, according to the TF. The SR transmits the data packet to the AP using the transmission power.

660. The AP receives a data packet sent by at least one STA.

In the embodiment of the present invention, when the received data packet is from another BSS, when the received power of the channel is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold. When the trigger frame is sent to the STA, not only the spatial multiplexing transmission opportunity can be increased, the system throughput is improved, but also interference between a large number of spatial multiplexing transmissions can be avoided.

The communication method according to an embodiment of the present invention is described in detail above with reference to FIGS. 1 through 6, and an access point and a station according to an embodiment of the present invention will be described in detail below with reference to FIGS. 7 through 10.

FIG. 7 is a schematic block diagram of an access point 700 in accordance with an embodiment of the present invention. As shown in FIG. 7, the access point 700 includes a listening unit 710, a processing unit 720, and a transmitting unit 730.

a listening unit 710, configured to listen to a channel, and detect channel energy to obtain a received power of the channel;

The processing unit 720 is configured to: when the data packet received through the channel is from another BSS other than the BSS where the AP is located, compare the received power, the first threshold, and the second threshold, where the first threshold is less than the second threshold;

The sending unit 730 is configured to: when the received power is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, send a message by using a channel, where the message includes an identifier of the BSS where the AP is located. Information, the message is used to notify at least one STA in the BSS where the AP is located to send a data packet through the channel.

The message can adopt the frame format of the TF-SR.

In the embodiment of the present invention, when the received data packet is from another BSS, when the received power of the channel is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold. When sending a message to a STA, not only can spatial multiplexing transmission opportunities be increased, system throughput can be improved, but interference due to a large amount of spatial multiplexing transmission can also be avoided.

Optionally, the message may further include at least one of the following information: a transmit power of the at least one STA, a second threshold, and an interference margin allowed by the AP.

Optionally, the message may further include at least one of the following: an adjustment value of the transmission power of each STA and an adjustment value of the second threshold of each STA.

Optionally, the message may further include resource allocation information of the at least one STA.

Optionally, the access point 700 may further include: a receiving unit 740, configured to: before the sending unit 730 sends the message by using a channel, receive SR capability information sent by each STA in the at least one STA, where the SR capability information includes the following at least A type of information: adjustment information allowing SR transmission, maximum transmission power, transmission power, and adjustment information of a second threshold.

Optionally, the sending unit 730 is further configured to send an SR capability information report request to each STA before the receiving unit 740 receives the SR capability information sent by each STA of the at least one STA.

It should be understood that an access point 700 in accordance with an embodiment of the present invention may correspond to an access point in a communication method 200 in accordance with an embodiment of the present invention, and the above and other operations and/or operations of various modules or units in the access point 700 The functions are respectively implemented in order to implement the corresponding processes of the method 200 of FIG. 2, and are not described herein for brevity.

FIG. 8 is a schematic block diagram of a station 800 in accordance with an embodiment of the present invention. As shown in FIG. 8, the station 800 includes a receiving unit 810 and a transmitting unit 820.

The receiving unit 810 is configured to receive a message that is sent by the AP, where the message includes the identifier information of the BSS where the AP is located, where the message is sent by the AP according to the comparison result of the received power of the channel, the first threshold, and the second threshold;

The sending unit 820 is configured to: when the BSS indicated by the identifier information and the BSS where the STA is located are the same BSS, send a data packet to the AP according to the message received by the receiving unit 810 through the channel.

The message can adopt the frame format of the TF-SR.

Optionally, the message includes at least one of the following information of at least one STA in the BSS: a transmit power, a second threshold, and an interference margin allowed by the AP.

Optionally, the sending unit 820 is specifically configured to: when the BSS indicated by the identifier information and the BSS where the STA is located are the same BSS, and the message further includes resource allocation information of the STA, according to the message The resource indicated by the resource allocation information transmits a data packet to the AP through the channel.

Optionally, the sending unit 820 is specifically configured to:

Comparing the received power of the channel with a second threshold;

When the received power is less than the second threshold, or the received power is equal to the second threshold, the data packet is sent to the AP through the channel according to the message.

Optionally, the message may further include at least one of the following information of the STA: an adjustment value of the transmission power and an adjustment value of the second threshold.

Optionally, the sending unit 820 is specifically configured to:

Determining the interference margin allowed by the AP or STA of other BSSs;

Determining the transmission power, the transmission power is less than the interference margin, or the transmission power is equal to the interference margin;

According to the message, the transmission power is used to send a data packet to the AP through the channel.

Optionally, the sending unit 820 is further configured to: before the receiving unit 810 receives the message sent by the AP, send the SR capability information to the AP, where the SR capability information includes at least one of the following: an allowable SR, a maximum transmit power, and an adjustment of the transmit power. Information and adjustment information for the second threshold.

Optionally, the receiving unit 810 is further configured to: before the sending unit 820 sends the SR capability information to the AP, receive the SR capability information report request sent by the AP.

It should be understood that a site 800 in accordance with an embodiment of the present invention may correspond to a site in a communication method 400 in accordance with an embodiment of the present invention, and that the above and other operations and/or functions of various modules or units in the site 800 are respectively implemented in order to implement FIG. The corresponding process of the method 400 is not repeated here for brevity.

FIG. 9 is a schematic block diagram of an access point 900 in accordance with another embodiment of the present invention. As shown in FIG. 9, access point 900 includes a processor 910, a memory 920, a bus system 930, and a transceiver 940. The processor 910, the memory 920 and the transceiver 940 are connected by a bus system 930 for storing instructions for executing instructions stored by the memory 920.

Wherein, the transceiver 940 listens to the channel;

The processor 910 is configured to detect channel energy according to the interception result of the transceiver 940 to obtain the received power of the channel;

The processor 910 is further configured to compare the received power, the first threshold, and the second threshold when the data packet received through the channel is from another basic service set other than the basic service set where the access point is located, where the first threshold is smaller than the first threshold Two thresholds;

The transceiver 940 is further configured to: when the received power is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, send a message by using a channel, where the message includes the BSS where the AP is located. Identification information, the message is used to notify at least one STA in the BSS where the AP is located to send a data packet through the channel.

The message can adopt the frame format of the TF-SR.

It should be understood that, in the embodiment of the present invention, the processor 910 may be a central processing unit (CPU), and the processor 910 may also be other general-purpose processors, digital signal processing (Digital Signal Processing, referred to as DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 920 can include read only memory and random access memory and provides instructions and data to the processor 910. A portion of the memory 920 may also include a non-volatile random access memory. For example, the memory 920 can also store information of the device type.

The bus system 930 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 930 in the figure.

In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 910 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 920, and the processor 910 reads the information in the memory 920 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

Optionally, the message includes at least one of the following: a transmit power of the at least one STA, a second threshold, and an interference margin allowed by the AP.

Optionally, the transceiver 940 is further configured to: before transmitting the message by using a channel, receive SR capability information sent by each STA of the at least one STA, where the SR capability information includes at least one of the following information: allowing SR transmission, maximum transmit power And adjustment information of the transmission power and adjustment information of the second threshold.

Optionally, the transceiver 940 is further configured to send an SR capability information report request to each STA before receiving the SR capability information sent by each STA of the at least one STA.

It is to be understood that the access point 900 in accordance with an embodiment of the present invention may correspond to an access point in the communication method 200 and an access point 700 in accordance with an embodiment of the present invention, and each of the access points 900 The above and other operations and/or functions of the modules or units are respectively implemented in order to implement the corresponding processes of the method 200 of FIG. 2, and are not described herein again for brevity.

FIG. 10 is a schematic block diagram of a site 1000 in accordance with another embodiment of the present invention. As shown in FIG. 10, the site 1000 includes a processor 1010, a memory 1020, a bus system 1030, and a transceiver 1040. The processor 1010, the memory 1020, and the transceiver 1040 are connected by a bus system 1030 for storing instructions for executing instructions stored by the memory 1020.

The transceiver 1040 is configured to receive a message sent by the AP, where the message includes the identifier information of the BSS where the AP is located, where the message is sent by the AP according to the comparison result of the received power of the channel, the first threshold, and the second threshold.

The transceiver 1040 is further configured to: when the BSS indicated by the identifier information is the same as the BSS where the STA is located When a BSS is used, a data packet is sent to the AP through the channel according to the received message.

The message can adopt the frame format of the TF-SR.

It should be understood that in the embodiment of the present invention, the processor 1010 may be a CPU, and the processor 1010 may also be other general-purpose processors, DSPs, ASICs, FPGAs, or other programmable logic devices, discrete gates or transistor logic devices, and discrete Hardware components, etc. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 1020 can include read only memory and random access memory and provides instructions and data to the processor 1010. A portion of the memory 1020 may also include a non-volatile random access memory. For example, the memory 1020 can also store information of the device type.

The bus system 1030 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as the bus system 1030 in the figure.

In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1010 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 1020, and the processor 1010 reads the information in the memory 1020 and performs the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

Optionally, the message may further include at least one of the following information of the at least one STA in the BSS: the transmit power, the second threshold, and an interference margin allowed by the AP.

Optionally, the transceiver 1040 is specifically configured to: when the BSS indicated by the identifier information and the BSS where the STA is located are the same BSS, and the message further includes the resource allocation information of the STA, the resource indicated by the resource allocation information is used according to the message. This channel sends a packet to the AP.

Optionally, the processor 1010 is further configured to: compare the received power of the channel with the second threshold; the transceiver 1040 is specifically configured to: when the received power is less than the second threshold, or the received power is equal to the second threshold, according to the message, The channel sends a packet to the AP.

Optionally, the message includes at least one of the following information of the STA: an adjustment value of the transmission power and an adjustment value of the second threshold.

Optionally, the processor 1040 is further configured to:

Determining the interference margin allowed by the AP or STA of other BSSs;

The transceiver 1040 is specifically configured to send a data packet to the AP by using the sending power according to the message.

Optionally, the transceiver 1040 is further configured to: before receiving the message sent by the AP, send the SR capability information to the AP, where the SR capability information includes at least one of the following information: an SR transmission, a maximum transmission power, and a transmission power adjustment information. Adjustment information of the second threshold.

Optionally, the receiver 1040 is further configured to: before sending the SR capability information to the AP, receive the SR capability information report request sent by the AP.

It should be understood that a site 1000 in accordance with an embodiment of the present invention may correspond to a site in a communication method 400 in accordance with an embodiment of the present invention, as well as a site 800 in accordance with an embodiment of the present invention, and the above and other operations of various modules or units in the site 1000 The functions and/or functions are respectively implemented in order to implement the corresponding processes of the method 400 of FIG. 4, and are not described herein for brevity.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative For example, the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be Ignore, or not execute. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing 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 the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A communication method, comprising:

The access point listens to the channel and detects channel energy to obtain the received power of the channel;

When the data packet received through the channel is from another basic service set other than the basic service set in which the access point is located, the access point compares the received power, the first threshold, and the second threshold, where The first threshold is less than the second threshold;

When the received power is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, the access point passes Transmitting, by the channel, a message, where the message includes identifier information of a basic service set in which the access point is located, where the message is used to notify at least one site in a basic service set where the access point is located to be sent through the channel. data pack.
The communication method according to claim 1, wherein the message further comprises at least one of the following: a transmission power of the at least one station, the second threshold, and an interference margin allowed by the access point. .
The communication method according to claim 1 or 2, wherein the message further comprises at least one of the following: an adjustment value of the transmission power of each of the stations and the second threshold of each of the stations Adjustment value.
The communication method according to any one of claims 1 to 3, wherein the communication method further comprises: before the sending of the message to the at least one station by using the channel, the communication method further comprises:

The access point receives spatial multiplexing capability information sent by each of the at least one site, where the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, and transmitting power. Adjustment information and adjustment information of the second threshold.
The communication method according to claim 4, wherein before the access point receives the spatial multiplexing capability information sent by each of the at least one site, the communication method further includes:

The access point sends a spatial multiplexing capability information reporting request to each of the sites.
The communication method according to any one of claims 1 to 5, wherein the message adopts a frame format of a spatial multiplexing trigger frame.
The communication method according to any one of claims 1 to 6, wherein the message further includes resource allocation information of the at least one station.
A communication method, comprising:

The station receives the message sent by the access point, where the message includes the identifier information of the basic service set where the access point is located, where the message is the received power of the access point according to the channel, the first threshold, and the second threshold. The result of the comparison is sent;

When the basic service set indicated by the identification information is the same basic service set as the basic service set in which the station is located, the station sends a data packet to the access point through the channel according to the message.
The communication method according to claim 8, wherein the message further comprises at least one of the following information of at least one station in the basic service set: transmission power, the second threshold, and the access point permission Interference margin.
The communication method according to claim 8 or 9, wherein when the basic service set indicated by the identification information and the basic service set in which the site is located are the same basic service set, the site is based on Sending, by the channel, the data packet to the access point by using the channel, including:

When the basic service set indicated by the identifier information is the same basic service set as the basic service set in which the site is located, and the message further includes resource allocation information of the site, the site adopts according to the message. The resource indicated by the resource allocation information sends a data packet to the access point through the channel.
The communication method according to any one of claims 8 to 10, wherein the transmitting, by the station, the data packet to the access point through the channel according to the message comprises:

The station compares the received power of the channel with the second threshold;

And when the received power is less than the second threshold, or the received power is equal to the second threshold, the station sends the data packet to the access point by using the channel according to the message.
The communication method according to any one of claims 8 to 11, characterized in that the message further comprises at least one of the following information of the station: an adjustment value of the transmission power and an adjustment value of the second threshold.
The communication method according to any one of claims 8 to 12, wherein the transmitting, by the station, the data packet to the access point through the channel according to the message comprises:

The station determines an interference margin allowed by an access point of another basic service set or a site;

The station determines a transmit power, the transmit power is less than the interference margin, or the transmit power is equal to the interference margin;

And the station sends a data packet to the access point by using the sending power according to the message according to the message.
The communication method according to any one of claims 8 to 13, wherein before the station receives the message sent by the access point, the communication method further includes:

The station sends spatial multiplexing capability information to the access point, where the spatial multiplexing capability information includes at least one of the following: a spatial multiplexing transmission, a maximum transmission power, and transmission power adjustment information, and the second Threshold adjustment information.
The communication method according to claim 14, wherein before the transmitting the spatial multiplexing capability information to the access point, the communication method further includes:

The station receives a spatial multiplexing capability information reporting request sent by the access point.
The communication method according to any one of claims 8 to 15, wherein the message adopts a frame format of a spatial multiplexing trigger frame.
An access point, comprising:

a listening unit, configured to listen to a channel, and detect channel energy to obtain a received power of the channel;

a processing unit, configured to compare the received power, the first threshold, and the second threshold when a data packet received through the channel is from another basic service set other than the basic service set in which the access point is located, where The first threshold is less than the second threshold;

a sending unit, configured to: when the received power is greater than the first threshold and less than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, The channel sends a message, where the message includes identification information of a basic service set in which the access point is located, and the message is used to notify at least one station in the basic service set to send a data packet through the channel.
The access point according to claim 17, wherein the message further comprises at least one of the following: a transmit power of the at least one station, the second threshold, and an interference allowed by the access point. the amount.
The access point according to claim 17 or 18, wherein the message further comprises at least one of the following: an adjustment value of the transmission power of each of the stations and the second of each of the stations The adjustment value of the threshold.
The access point according to any one of claims 17 to 19, further comprising:

a receiving unit, configured to send, by the sending unit, the message to the at least one station by using the channel The spatial multiplexing capability information sent by each of the at least one site is received, where the spatial multiplexing capability information includes at least one of the following information: a spatial multiplexing transmission, a maximum transmission power, and a transmission power adjustment information. And adjustment information of the second threshold.
The access point according to claim 20, wherein the sending unit is further configured to: before the receiving unit receives the spatial multiplexing capability information sent by each of the at least one station, Each site sends a spatial multiplexing capability information report request.
The access point according to any one of claims 17 to 21, wherein the message adopts a frame format of a spatial multiplexing trigger frame.
The access point according to any one of claims 17 to 22, wherein the message further comprises resource allocation information of the at least one station.
A site characterized by comprising:

a receiving unit, configured to receive a message sent by an access point, where the message includes identifier information of a basic service set where the access point is located, where the message is a received power of the access point according to a channel, a first threshold, and The comparison result of the second threshold is sent;

a sending unit, configured to: when the basic service set indicated by the identifier information is the same basic service set as the basic service set in which the site is located, according to the message received by the receiving unit The access point sends a data packet.
The station according to claim 24, wherein the message further comprises at least one of the following information of at least one station in the basic service set: transmission power, the second threshold, and the access point allowed Interference margin.
The station according to claim 24 or 25, wherein the sending unit is specifically configured to: when the basic service set indicated by the identification information is the same basic service set as the basic service set of the site, And when the message further includes the resource allocation information of the site, the resource indicated by the resource allocation information is used to send a data packet to the access point by using the channel according to the message.
The station according to any one of claims 24 to 26, wherein the transmitting unit is specifically configured to:

Comparing the received power of the channel with the second threshold;

And when the received power is less than the second threshold, or the received power is equal to the second threshold, sending the data packet to the access point.
A station according to any one of claims 24 to 27, characterized in that said The information further includes at least one of the following information of the station: an adjustment value of the transmission power and an adjustment value of the second threshold.
The station according to any one of claims 24 to 28, wherein the transmitting unit is specifically configured to:

Determine the interference margin allowed by the access point or site of other basic service sets;

Determining a transmission power, the transmission power being less than the interference margin, or the transmission power being equal to the interference margin;

And transmitting, according to the message, the data packet to the access point by using the sending power through the channel.
The station according to any one of claims 24 to 29, wherein the sending unit is further configured to: send a spatial complex to the access point before the receiving unit receives the message sent by the access point With the capability information, the spatial multiplexing capability information includes at least one of the following information: a spatial multiplexing transmission, a maximum transmission power, adjustment information of the transmission power, and adjustment information of the second threshold.
The station according to claim 30, wherein the receiving unit is further configured to: before the sending unit sends the spatial multiplexing capability information to the access point, receive a spatial complex sent by the access point Report the request with the capability information.
A station according to any one of claims 24 to 31, wherein the message uses a frame format of a spatial multiplexing trigger frame.