CN106550377B

CN106550377B - Communication method, access point and station

Info

Publication number: CN106550377B
Application number: CN201510599319.5A
Authority: CN
Inventors: 马驰翔; 罗俊; 林英沛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-09-18
Filing date: 2015-09-18
Publication date: 2020-02-14
Anticipated expiration: 2035-09-18
Also published as: CN106550377A; WO2017045439A1

Abstract

The embodiment of the invention provides a communication method, an access point and a site. The communication method comprises the following steps: the access point monitors a channel and detects the channel energy to obtain the receiving power of the channel; when the data packet received by the channel comes from other basic service sets except the basic service set where the access point is located, the access point compares the received power, a first threshold value and a second threshold value, wherein the first threshold value is smaller than the second threshold value; 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 sends a message through the channel, wherein the message includes identification information of a BSS in which the AP is located, and the message is used for notifying at least one STA in the BSS in which the AP is located to be capable of sending a data packet through the channel. The embodiment of the invention not only can increase the spatial multiplexing transmission opportunity and improve the system throughput, but also can avoid the interference caused by a large amount of spatial multiplexing transmission.

Description

Communication method, access point and station

Technical Field

The present invention relates to the field of communications, and in particular, to a communication method, an access point, and a station.

Background

With the development of the mobile internet and the popularization of the intelligent terminal, the data traffic shows a explosive growth trend. Wireless Local Area Network (WLAN) is one of the mainstream mobile broadband access technologies today due to its advantages of high speed and low cost.

An existing 802.11 ac-based WLAN system adopts an Orthogonal Frequency Division Multiplexing (OFDM) modulation scheme, and a Spatial Reuse (SR) mechanism is not adopted in a Media Access Control (MAC) layer for data transmission. Thus, only one transmission link is allowed to exist in a certain space.

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

Disclosure of Invention

The embodiment of the invention provides a communication method, an access point and a station, which not only can increase the space multiplexing transmission opportunity and improve the system throughput, but also can avoid the interference caused by a large amount of space multiplexing transmission.

In a first aspect, a communication method is provided, including: the access point monitors a channel and detects the channel energy to obtain the receiving power of the channel; when the data packet received by the channel comes from other basic service sets except the basic service set where the access point is located, the access point compares the received power, a first threshold value and a second threshold value, wherein the first threshold value is smaller than the second threshold value; 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 sends a message through the channel, 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 that a data packet can be sent through the channel.

With reference to the first aspect, in a first possible implementation manner, the message further includes at least one of the following information: the transmit power of the at least one station, the second threshold, and an allowed interference margin for the access point.

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 information: an adjustment value of the transmission power of each station and an adjustment value of the second threshold of each station.

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

With reference to the third possible implementation manner, in a fourth possible implementation manner, before the receiving, by the access point, the spatial multiplexing capability information sent by each of the at least one station, the communication method further includes: and the access point sends a spatial multiplexing capability information reporting request to each station.

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

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

In a second aspect, a communication method is provided, including: a station receives a message sent by an access point, wherein the message comprises identification information of a basic service set in which the access point is located, and the message is sent by the access point according to a comparison result of the receiving power of a channel, a first threshold and a second threshold; and when the basic service set indicated by the identification information and the basic service set where the station is located are the same basic service set, the station sends a data packet to the access point through the channel according to the message.

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

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, when the basic service set indicated by the identification information and the basic service set where the station is located are the same basic service set, the sending, by the station, a data packet to the access point through the channel according to the message includes: and when the basic service set indicated by the identification information and the basic service set where the station is located are the same basic service set and the message further comprises resource allocation information of the station, the station sends a data packet to the access point through the channel by using the resource indicated by the resource allocation information according to the message.

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 sending, by the station, the data packet to the access point according to the message includes: the station comparing the received power of the channel with the second threshold; and when the received power is smaller than the second threshold value or the received power is equal to the second threshold value, the station sends the data packet to the access point.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a fourth possible implementation of the second aspect, the message 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.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a fifth possible implementation of the second aspect, the sending, by the station, the data packet to the access point according to the message includes: the station determines the allowed interference allowance of the access points or stations of other basic service sets; the station determines a transmission power, wherein the transmission power is smaller than the interference margin, or the transmission power is equal to the interference margin; and the station transmits a data packet to the access point through the channel by adopting the transmission power according to the message.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a sixth possible implementation of the second aspect, 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, wherein the spatial multiplexing capability information comprises at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold.

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 includes: and the station receives 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 implementations of the second aspect, in an eighth possible implementation of the second aspect, the message adopts a frame format of a spatial multiplexing trigger frame.

In a third aspect, an access point is provided, including: the device comprises an interception unit, a receiving unit and a control unit, wherein the interception unit is used for intercepting a channel and detecting channel energy to acquire the receiving power of the channel; a processing unit, configured to compare the received power, a first threshold, and a second threshold when a data packet received through the channel is from a 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; a sending unit, configured to send a message through the channel when the received power is greater than the first threshold and smaller than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, where the message includes identification information of a basic service set where the access point is located, and the message is used to notify at least one station in the basic service set that a data packet can be sent 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 the following information: the transmit power of the at least one station, the second threshold, and an allowed interference margin for the access point.

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: an adjustment value of the transmission power of each station and an adjustment value of the second threshold of each station.

With reference to 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 receive, before the sending unit sends a message to at least one station through the channel, spatial multiplexing capability information sent by each station of the at least one station, where the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the sending unit is further configured to send a spatial multiplexing capability information reporting request to each of the at least one station before the receiving unit receives spatial multiplexing capability information sent by each of the at least one station.

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

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

In a fourth aspect, there is provided a station comprising: a receiving unit, configured to receive a message sent by an access point, where the message includes identification information of a basic service set in which the access point is located, and the message is sent by the access point according to a comparison result between a received power of a channel and a first threshold and a second threshold; a sending unit, configured to send a data packet to the access point through the channel according to the message received by the receiving unit when the basic service set indicated by the identification information is the same basic service set as the basic service set where the station is located.

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 at least one station in the basic service set: a transmit power, the second threshold, and an allowed interference margin for 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 send, when the basic service set indicated by the identification information and the basic service set where the station is located are the same basic service set, and the message further includes resource allocation information of the station, a data packet to the access point by using a resource indicated by the resource allocation information according to the message.

With reference to the fourth aspect or the first or 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: comparing the received power of the channel with the second threshold; and when the received power is smaller than the second threshold value or the received power is equal to the second threshold value, sending the data packet to the access point.

With reference to the fourth aspect or any one of the foregoing possible implementations of the fourth aspect, in a fourth possible implementation of the fourth aspect, the message 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.

With reference to the fourth aspect or any one of the foregoing possible implementations of the fourth aspect, in a fifth possible implementation of the fourth aspect, the sending unit is specifically configured to: determining the allowed interference margin of the access points or the stations of other basic service sets; determining a transmission power, wherein the transmission power is smaller than the interference margin or equal to the interference margin; and sending a data packet to the access point through the channel by adopting the sending power according to the message.

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, to the access point, spatial multiplexing capability information before the receiving unit receives a message sent by the access point, where the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold.

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

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

Based on the above technical solution, in the embodiment of the present invention, when the received data packet is from other BSSs, and 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 sends a message to the STA, which not only can increase the spatial multiplexing transmission opportunity and improve the system throughput, but also can avoid interference caused by a large amount of spatial multiplexing transmissions.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

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

Fig. 3A is a schematic diagram of a spatial multiplexing trigger frame of a communication method according to 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.

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

Fig. 4 is a schematic flow chart diagram of a communication method according to another embodiment of the present invention.

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

Fig. 6 is a schematic flow chart diagram of a communication method according to another embodiment of the present invention.

Fig. 7 is a schematic block diagram of an access point according to an embodiment of the present invention.

Fig. 8 is a schematic block diagram of a station according to an embodiment of the present invention.

Fig. 9 is a schematic block diagram of an access point according to another embodiment of the present invention.

Fig. 10 is a schematic block diagram of a station according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

The embodiment of the present invention may be applied to a WLAN, which may be a Basic Service Set (BSS) including an Access Point (AP), for example, an infrastructure Basic Service Set (infrastructured BSS); the wireless lan may be a PBSS (Personal Basic Service Set) that does not include an AP (access point), in which case a normal STA (Station) may play a role of a network controller. The embodiment of the invention does not distinguish the PBSS established by the network controller from the BSS established by the AP, and the PBSS and the BSS are collectively called BSS.

It should be understood that the technical solution of the present invention can also be applied to other wireless communication systems, for example, TDMA (Time Division Multiple Access) networks of other systems, GSM (Global System of Mobile communication) systems, CDMA (Code Division Multiple Access) systems, WCDMA (Wideband Code Division Multiple Access) systems, GPRS (General Packet Radio Service), LTE (Long Term Evolution) systems, LTE-a (Advanced Long Term Evolution) systems, UMTS (Universal Mobile telecommunications System), and the like, which are not limited to this, but for convenience of description, the embodiments of the present invention will be described as a wireless local area network (wlan) network.

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 a communication network.

The STAs may be wireless sensors, wireless communication terminals or mobile terminals such as mobile phones (or "cellular" phones) supporting WiFi communication functionality and computers having wireless communication functionality, e.g., portable, pocket, hand-held, computer-embedded or vehicle-mounted wireless communication devices supporting WiFi communication functionality, which exchange voice and/or data with a radio access network.

Fig. 1 is a schematic diagram of a WLAN deployment scenario to which embodiments of the present invention are applicable. The WLAN deployment scenario shown in fig. 1 includes AP1, AP2, and AP3, and a plurality of STAs. Illustratively, 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, the AP1, the AP2, and the AP3 may be devices supporting 802.11ax standard, and may be backward compatible with multiple WLAN standards such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11 a.

Fig. 2 is a schematic flow chart diagram of a communication method 200 according to an embodiment of the present invention. The communication method 200 may be performed by the AP, or may be performed by an STA, which plays a role of a network controller, in the PBSS that does not include the AP. However, for convenience of description, the embodiments of the present invention are described by taking the AP as an example. As shown in fig. 2, the communication method 200 may include:

210. the AP monitors a channel and detects the channel energy to obtain the receiving power of the channel;

220. when the data packet received through the channel comes from other BSSs except the BSS where the AP is located, the AP compares the received power, a first threshold value and a second threshold value, wherein the first threshold value is smaller than the second threshold value;

230. when the received power is greater than (above) a first threshold and less than (below) a second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, the AP transmits a message through the channel, where the message includes identification information of a BSS in which the AP is located, and the message is used to notify at least one STA in the BSS in which the AP is located to be able to transmit a data packet through the channel.

The message may adopt a Frame format of a Spatial multiplexing Trigger Frame (TF-SR for short). However, the invention is not limited to this, 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 generally adopted in the prior art.

When the AP sends the message through the channel, both the STA in the BSS where the AP is located and the STAs in other BSSs may receive the message, and because the message carries identification information of the BSS, the STAs in other BSSs do not respond to the message after receiving the message, and the STA in the BSS where the AP is located may send a data packet to the AP according to the message.

The first threshold may correspond to a threshold for Clear Channel Assessment (CCA) in the prior art. In the prior art, when the receiving power of a channel is greater than the threshold of CCA, the channel is considered busy; when the received power of the channel is less than the CCA threshold, the channel is considered to be idle, and the AP may trigger the STA to transmit uplink data. In the embodiment of the present invention, when the received power of the channel is greater than the first threshold and 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 Reuse (SR) transmission.

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

When the first threshold is equal to the CCA threshold 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 second threshold may be considered as a trigger condition for whether the channel allows spatial multiplexing, and 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 a data packet to at least one STA, so as to implement 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 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 allow spatial multiplexing transmission to be implemented, and therefore, the AP sends a message to the STA to trigger the STA to send a data packet, thereby implementing spatial multiplexing transmission.

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

In the embodiment of the invention, the uplink spatial multiplexing transmission is controlled by the AP, so that the interference among 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 other BSSs, and 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 sends a message to the STA, which not only can increase the spatial multiplexing transmission opportunity and improve the system throughput, but also can avoid the 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 which is immediately sent by each STA in at least one STA according to the message; or the AP receives a data packet immediately transmitted by a part of STAs in at least one STA according to the message, and receives a data packet transmitted by the rest STAs in the at least one STA in a delayed manner.

For example, after at least one STA receives the message, if all STAs send data packets to the AP according to the message, the AP may receive the data packets sent by each STA of the at least one STA; if a part of the STAs determine that the data packet cannot be transmitted to the AP temporarily according to the received power of the channel or the allowed interference margin (margin) of the AP or the STAs of other BSSs, the part of the STAs continue to wait for the AP to transmit the message, that is, the part of the STAs delay transmitting the data packet to the AP.

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

For example, if the AP listens to the channel and finds that there is already another link, the message sent by the AP may include at least one of the following information: a transmit power of at least one STA, a second threshold. If the AP finds 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: a transmit power of at least one STA, a second threshold, and an allowed interference margin for the AP.

The STAs in other BSSs may determine the transmit power when transmitting the data packet according to the interference margin allowed by the AP.

Optionally, the message may include at least one of the following information: 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 the first threshold of 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 transmits the data packet using the resource indicated by the resource allocation information. However, the embodiment of the present invention is not limited to carry the resource allocation information in the message, and the AP may also send the resource allocation information to at least one STA in the BSS where the AP is located in other manners.

Fig. 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, 3B and 3C, the TF-SR may include:

frame Control (FC) field: a subtype (subtype) value in the FC field may be set to a value not used in the standard;

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

receiving node address field: the figure is represented by (a1), since there may be one or more receiving nodes, the receiving node address field is optional, that is, the spatial multiplexing trigger frame may not include the receiving node address field, and "()" represents that a1 is optional;

sending node address field: denoted a 2;

common information (Common Info) field: may include common information for multiple STAs in the BSS;

each User Info (Per User Info) field: including information for each STA;

frame Check Sequence (FCS): for checking the correctness of the data packet.

For example, as shown in fig. 3A, 3B and 3C, the common information field in the spatial multiplexing trigger frame may include at least one of the following information: a transmit power of at least one STA, a second threshold, and an allowed interference margin for the AP. The user information field in the trigger frame may include at least one of the following information: 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 a common information field, but is not limited thereto by the embodiment of the present invention. For example, as shown in fig. 3B, the TF type indication may also be set in the FC field. As another example, as shown in FIG. 3C, the TF type indication may also be set in the Add New field. The TF type indication may indicate the TF-SR with 4 bits, e.g., 0001, and other values may be reserved values (reserved).

It should be noted that fig. 3 is only an illustration and should not limit the embodiment of the present invention.

Optionally, before step 230, the communication method 200 may further include: the AP receives SR capability information sent by each STA in at least one STA, wherein the SR capability information comprises at least one of the following information: SR transmission is allowed, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold value.

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

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

The SR capability information transmitted by the STA may be SR capability information for a current channel or SR capability information for a plurality of channels. When the STA transmits SR capability information for a plurality of 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 SR capability information to the AP, or the AP may specify that the STA reports SR capability information. For example, before the AP receives the SR capability information transmitted by each STA of the at least one STA, the communication method 200 further includes: the AP sends an SR capability information reporting request to each STA.

When the SR capability information includes the maximum transmission power and the adjustment information of 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 adjust the second threshold according to the adjustment information of the second threshold.

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

It should be noted that the SR capability information may further include that SR transmission is not allowed, and in this 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, the AP sends a message to the STA 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, which not only increases the spatial multiplexing transmission opportunity and improves the system throughput, but also avoids interference between a large number of spatial multiplexing transmissions.

Fig. 4 is a schematic flow chart diagram of a communication method 400 according to 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 to avoid redundancy. As shown in fig. 4, the communication method 400 may include the following.

410. The STA receives a message sent by the AP, wherein the message comprises identification information of a BSS in which the AP is positioned, and the message is sent by the AP according to the received power of a channel and the comparison result of a first threshold and a second threshold;

420. and when the BSS indicated by the identification 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 information.

Wherein the message may adopt a frame format of TF-SR.

In the embodiment of the invention, the STA sends the data packet to the AP according to the message sent by the AP according to the receiving power of the channel, the first threshold and the second threshold, so that the spatial multiplexing transmission can be realized, and the system throughput can be further improved.

In addition, in the embodiment of the invention, the uplink spatial multiplexing transmission is controlled by the AP, so that the interference among a large amount of uplink spatial multiplexing transmissions can be avoided.

It should be noted that, step 420 may include: the STA immediately sends a data packet to the AP according to the message; alternatively, the STA delays transmission of the data packet to the AP according to the message.

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

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

Optionally, step 420 may include: and when the BSS indicated by the identification information and the BSS where the STA is located are the same BSS and the message also comprises the resource allocation information of the STA, the STA adopts the resource indicated by the resource allocation information to send a data packet to the AP through a channel according to the message.

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

the STA compares the receiving power of the channel with a second threshold value;

and when the received power is smaller than a second threshold value or the received power is equal to the second threshold value, 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 when the received power is equal to the first threshold, the STA adopts an uplink spatial multiplexing transmission mode to send data to the AP; when the received power is less than the CCA threshold in the prior art, the channel is considered to be idle, and the STA transmits a data packet to the AP in a conventional transmission manner.

In addition, when the received power is greater than the second threshold value in the message, or the received power is equal to the second threshold value, the AP continues to wait to send the message again, that is, the data packet is delayed from being sent to the AP.

In the embodiment of the invention, after receiving the message, the STA needs to compare the receiving power of the channel with the second threshold, and control the time for sending the data packet to the AP or the transmission mode according to the comparison result. In the embodiment of the invention, the STA sends the data packet to the AP when the receiving power of the channel is less than or equal to the second threshold value, so that the interference caused by a large amount of space multiplexing transmission can be avoided.

The method for the STA to obtain the second threshold is not limited in the embodiment of the present invention. The STA may obtain the second threshold from the message sent by the AP, and the STA may also obtain the second threshold in other manners, for example, the second threshold may be preconfigured in the STA. Similarly, the method for the STA to obtain the first threshold is similar, and is 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 User information (Per User Info) field in the TF-SR includes at least one of the following information: an adjustment value of transmission power and an adjustment value of a threshold value for each STA.

And after each STA receives the message, adjusting the local transmitting power according to the adjusting value of the transmitting power, and adjusting the local second threshold according to the adjusting value of the second threshold.

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

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

Optionally, the sending, by the STA, the data packet to the AP according to the message includes:

the STA determines the allowable interference allowance of the AP or STA of other BSS;

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

and the STA adopts the transmission power to transmit a data packet to the AP through the channel according to the message.

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

For example, the STA may adjust the transmit power down by x dB relative to the maximum transmit power, i.e., maximum transmit power-x; accordingly, the STA may up-regulate the threshold CCA _ SR by w × x dB, i.e., CCA _ SR + w × x, where w is a predetermined value, and may be 1, for example.

Optionally, when the transmission power of the STA cannot be adjusted to be smaller than the allowed interference margin of the AP or the STA of other BSSs, the STA will continue to wait for the AP to transmit the message again, i.e., delay transmitting the data packet to the AP.

Optionally, if there are multiple other BSSs, the transmission power used by the STA to transmit the data packet to the AP is less than or equal to the 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 SR capability information to the AP, wherein the SR capability information comprises at least one of the following information: SR transmission is allowed, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold value.

The maximum transmission power may be the maximum transmission power that can be supported by the STA, or may also be the maximum transmission power that the STA determines according to the allowed interference margin of the AP or the STA of the other BSS, i.e., the maximum transmission power that is allowed without interfering with the existing link in the other BSS.

The SR capability information may be carried in an SR report (SR report) frame. Fig. 5 is a frame format diagram of an SR report frame. The corresponding description of the fields in the frame format shown in fig. 5 can refer to the content in fig. 3A, fig. 3B, and fig. 3C, and is not repeated herein to avoid repetition.

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

That is, the STA may autonomously decide to report SR capability information to the AP; or, the STA may report the SR capability information according to an SR capability reporting request sent by the AP.

In the embodiment of the invention, the STA sends the data packet to the AP through the channel according to the message sent by the AP according to the receiving power of the channel, the first threshold and the second threshold, so that uplink spatial multiplexing transmission can be realized, the system throughput can be further improved, and the interference among a large amount of uplink spatial multiplexing transmission can be avoided.

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

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

The AP determines whether 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, and the received packet is from another BSS 620.

The AP sends a TF-SR to at least one STA in the BSS in which the AP resides 630.

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

At least one STA receives the TF-SR 640.

And 650, each STA in the at least one STA sends a data packet to the AP according to the TF-SR for uplink SR transmission.

Optionally, the STA transmitting the data packet to the AP according to the TF-SR may include: the STA compares the receiving power of the channel with a second threshold value; and when the received power is smaller than a second threshold value or equal to the second threshold value, the STA sends a data packet to the AP according to the TF-SR.

Optionally, the STA sending the data packet to the AP according to the TF-SR may further include: the STA determines the allowable interference allowance of the AP or STA of other BSS; the STA determines the transmission power, wherein the transmission power is less than the interference margin, or the transmission power is equal to the interference margin; and transmitting the data packet to the AP by adopting the transmission power according to the TF-SR.

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

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

In the embodiment of the present invention, when the received data packet is from other BSSs, and 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 sends the trigger frame to the STA, which not only can increase the spatial multiplexing transmission opportunity and improve the system throughput, but also can avoid interference between a large number of spatial multiplexing transmissions.

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

Fig. 7 is a schematic block diagram of an access point 700 according to an embodiment of the present invention. As shown in fig. 7, the access point 700 includes: listening unit 710, processing unit 720 and sending unit 730.

An interception unit 710, configured to intercept a channel, detect channel energy to obtain a received power of the channel;

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

a sending unit 730, configured to send a message through a channel when the received power is greater than the first threshold and smaller than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, where the message includes identification information of a BSS in which the AP is located, and the message is used to notify at least one STA in the BSS in which the AP is located that the at least one STA can send a data packet through the channel.

Wherein the message may be in a frame format of TF-SR.

In the embodiment of the present invention, when the received data packet is from other BSSs, and 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 sends a message to the STA, which not only can increase the spatial multiplexing transmission opportunity and improve the system throughput, but also can avoid interference caused by a large amount of spatial multiplexing transmission.

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

Optionally, the message may further include at least one of the following information: 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 at least one STA.

Optionally, the access point 700 may further include: a receiving unit 740, configured to receive, before the transmitting unit 730 transmits the message through the channel, SR capability information transmitted by each STA of the at least one STA, where the SR capability information includes at least one of the following information: SR transmission is allowed, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold value.

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

It should be understood that the access point 700 according to the embodiment of the present invention may correspond to an access point in the communication method 200 according to the embodiment of the present invention, and the above and other operations and/or functions of each module or unit in the access point 700 are respectively for implementing the corresponding flow of the method 200 of fig. 2, and are not described herein again for brevity.

Fig. 8 is a schematic block diagram of a station 800 according to an embodiment of the present invention. As shown in fig. 8, a site 800 includes: a receiving unit 810 and a transmitting unit 820.

A receiving unit 810, configured to receive a message sent by an AP, where the message includes identification information of a BSS in which the AP is located, and the message is sent by the AP according to a comparison result of the received power of the channel and the first threshold and the second threshold;

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

Wherein the message may be in a frame format of TF-SR.

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

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

Optionally, the sending unit 820 is specifically configured to:

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

and when the received power is less than a second threshold value or the received power is equal to the second threshold value, transmitting a data packet 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 allowed interference allowance of the AP or STA of other BSS;

determining a transmission power, wherein the transmission power is smaller than the interference margin or equal to the interference margin;

and transmitting the data packet to the AP through the channel by using the transmission power according to the message.

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

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

It should be understood that the station 800 according to the embodiment of the present invention may correspond to a station in the communication method 400 according to the embodiment of the present invention, and the above and other operations and/or functions of each module or unit in the station 800 are respectively for implementing the corresponding flow of the method 400 of fig. 4, and are not described herein again for brevity.

Fig. 9 is a schematic block diagram of an access point 900 according to another embodiment of the present invention. As shown in fig. 9, the access point 900 includes: a processor 910, a memory 920, a bus system 930, and a transceiver 940. Wherein, the processor 910, the memory 920 and the transceiver 940 are connected via the bus system 930, the memory 920 is used for storing instructions, and the processor 910 is used for executing the instructions stored in the memory 920.

Wherein the transceiver 940 listens to the channel;

the processor 910 is configured to detect a channel energy according to a listening result of the transceiver 940 to obtain a receiving power of the channel;

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

the transceiver 940 is further configured to send a message through a channel 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, where the message includes identification information of a BSS in which the AP is located, and the message is used to notify at least one STA in the BSS in which the AP is located to be able to send a data packet through the channel.

Wherein the message may be in a frame format of 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 Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), 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 920 may include a read-only memory and a random access memory, and provides instructions and data to the processor 910. A portion of the memory 920 may also include non-volatile random access memory. For example, the memory 920 may also store device type information.

The bus system 930 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. For clarity of illustration, however, the various buses are designated in the figure as the bus system 930.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 910. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in the memory 920, and the processor 910 reads the information in the memory 920 and performs the steps of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

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

Optionally, the transceiver 940 is further configured to receive, before transmitting the message through the channel, SR capability information transmitted by each STA of the at least one STA, where the SR capability information includes at least one of: SR transmission is allowed, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold value.

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

It should be understood that the access point 900 according to the embodiment of the present invention may correspond to the access point in the communication method 200 according to the embodiment of the present invention and the access point 700 according to the embodiment of the present invention, and the above and other operations and/or functions of each module or unit in the access point 900 are respectively for implementing the corresponding flow of the method 200 of fig. 2, and are not repeated herein for brevity.

Fig. 10 is a schematic block diagram of a station 1000 according to another embodiment of the invention. As shown in fig. 10, the station 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 coupled via a bus system 1030, the memory 1020 is configured to store instructions, and the processor 1010 is configured to execute the instructions stored in the memory 1020.

A transceiver 1040, configured to receive a message sent by an AP, where the message includes identification information of a BSS in which the AP is located, and the message is sent by the AP according to a comparison result of the received power of the channel and the first threshold and the second threshold;

the transceiver 1040 is further configured to send a data packet to the AP through the channel according to the received message when the BSS indicated by the identification information is the same BSS as the BSS where the STA is located.

Wherein the message may be in a frame format of TF-SR.

It should be understood that in embodiments 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 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 1020 may include both read-only memory and random access memory, and provides instructions and data to the processor 1010. A portion of memory 1020 may also include non-volatile random access memory. For example, memory 1020 may also store device type information.

The bus system 1030 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. For clarity of illustration, however, the various buses are designated in the figure as the bus system 1030.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1010. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. 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 the hardware thereof. To avoid repetition, it is not described in detail here.

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

Optionally, the transceiver 1040 is specifically configured to, when the BSS indicated by the identification information is the same BSS as the BSS where the STA is located, and the message further includes resource allocation information of the STA, transmit the data packet to the AP through the channel by using the resource indicated by the resource allocation information according to the message.

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

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 allowed interference allowance of the AP or STA of other BSS;

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

the transceiver 1040 is specifically configured to transmit data packets to the AP over the channel using the transmit power according to the message.

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

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

It should be understood that the station 1000 according to the embodiment of the present invention may correspond to the station in the communication method 400 according to the embodiment of the present invention and the station 800 according to the embodiment of the present invention, and the above and other operations and/or functions of each module or unit in the station 1000 are respectively for implementing the corresponding flow of the method 400 of fig. 4, and are not described herein again for brevity.

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 implementation. 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 invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method of communication, comprising:

the access point monitors a channel and detects the channel energy to obtain the receiving power of the channel;

when the data packet received by the channel comes from other basic service sets except the basic service set where the access point is located, the access point compares the received power, a first threshold value and a second threshold value, wherein the first threshold value is smaller than the second threshold value;

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 sends a message through the channel, 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 in which the access point is located that at least one station can send a data packet through the channel.

2. The communication method according to claim 1, wherein the message further comprises at least one of the following information: the transmit power of the at least one station, the second threshold, and an allowed interference margin for the access point.

3. The communication method according to claim 1 or 2, wherein the message further comprises at least one of the following information: an adjustment value of the transmission power of each station and an adjustment value of the second threshold of each station.

4. The communication method of claim 3, wherein the access point, prior to sending the message to the at least one station over the channel, further comprises:

the access point receives spatial multiplexing capability information sent by each station of the at least one station, where the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold.

5. The communication method according to claim 4, wherein before the access point receives the spatial multiplexing capability information transmitted by each of the at least one station, the communication method further comprises:

and the access point sends a spatial multiplexing capability information reporting request to each station.

6. The communication method according to claim 3, wherein the message is in a frame format of a spatial multiplexing trigger frame.

7. The communication method according to claim 3, wherein the message further comprises resource allocation information of the at least one station.

8. A method of communication, comprising:

a station receives a message sent by an access point, wherein the message comprises identification information of a basic service set in which the access point is located, and the message is sent when the receiving power of a channel of the access point is greater than a first threshold and less than a second threshold, or the receiving power is equal to the first threshold, or the receiving power is equal to the second threshold;

and when the basic service set indicated by the identification information and the basic service set where the station is located are the same basic service set, the station sends a data packet to the access point through the channel according to the message.

9. 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: a transmit power, the second threshold, and an allowed interference margin for the access point.

10. The communication method according to claim 8 or 9, wherein, 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, including:

and when the basic service set indicated by the identification information and the basic service set where the station is located are the same basic service set and the message further comprises resource allocation information of the station, the station sends a data packet to the access point through the channel by using the resource indicated by the resource allocation information according to the message.

11. The communication method according to claim 10, wherein the station sending the data packet to the access point through the channel according to the message comprises:

the station comparing the received power of the channel with the second threshold;

and when the received power is smaller than the second threshold value or the received power is equal to the second threshold value, the station sends the data packet to the access point through the channel according to the message.

12. The communication method according to claim 10, wherein the message 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.

13. The communication method according to claim 10, wherein the station sending the data packet to the access point through the channel according to the message comprises:

the station determines the allowed interference allowance of the access points or stations of other basic service sets;

the station determines a transmission power, wherein the transmission power is smaller than the interference margin, or the transmission power is equal to the interference margin;

and the station transmits a data packet to the access point through the channel by adopting the transmission power according to the message.

14. The communication method according to claim 10, wherein before the station receives the message transmitted by the access point, the communication method further comprises:

the station sends spatial multiplexing capability information to the access point, wherein the spatial multiplexing capability information comprises at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold.

15. The communication method according to claim 14, wherein before the station transmits the spatial multiplexing capability information to the access point, the communication method further comprises:

and the station receives a spatial multiplexing capability information reporting request sent by the access point.

16. The communication method according to claim 10, wherein the message is in a frame format of a spatial multiplexing trigger frame.

17. An access point, comprising:

the device comprises an interception unit, a receiving unit and a control unit, wherein the interception unit is used for intercepting a channel and detecting channel energy to acquire the receiving power of the channel;

a processing unit, configured to compare the received power, a first threshold, and a second threshold when a data packet received through the channel is from a 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;

a sending unit, configured to send a message through the channel when the received power is greater than the first threshold and smaller than the second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold, where the message includes identification information of a basic service set where the access point is located, and the message is used to notify at least one station in the basic service set that a data packet can be sent through the channel.

18. The access point of claim 17, wherein the message further comprises at least one of the following information: the transmit power of the at least one station, the second threshold, and an allowed interference margin for the access point.

19. The access point according to claim 17 or 18, wherein the message further comprises at least one of the following information: an adjustment value of the transmission power of each station and an adjustment value of the second threshold of each station.

20. The access point of claim 19, further comprising:

a receiving unit, configured to receive spatial multiplexing capability information sent by each station in at least one station before the sending unit sends a message to the at least one station through the channel, where the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold.

21. The access point of claim 20, wherein the sending unit is further configured to send a spatial multiplexing capability information reporting request to each of the at least one station before the receiving unit receives the spatial multiplexing capability information sent by each station.

22. The access point of claim 19, wherein the message is in a frame format of a spatially multiplexed trigger frame.

23. The access point of claim 19, wherein the message further comprises resource allocation information for the at least one station.

24. A station, comprising:

a receiving unit, configured to receive a message sent by an access point, where the message includes identification information of a basic service set in which the access point is located, where the message is sent by the access point when a received power of a channel is greater than a first threshold and smaller than a second threshold, or the received power is equal to the first threshold, or the received power is equal to the second threshold;

a sending unit, configured to send a data packet to the access point through the channel according to the message received by the receiving unit when the basic service set indicated by the identification information is the same basic service set as the basic service set where the station is located.

25. The station of claim 24, wherein the message further comprises at least one of the following information for at least one station in the basic service set: a transmit power, the second threshold, and an allowed interference margin for the access point.

26. 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 and the basic service set where the station is located are the same basic service set, and the message further includes resource allocation information of the station, send a data packet to the access point through the channel by using a resource indicated by the resource allocation information according to the message.

27. The station according to claim 26, wherein the sending unit is specifically configured to:

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

and when the received power is smaller than the second threshold value or the received power is equal to the second threshold value, sending the data packet to the access point.

28. The station of claim 26, wherein the message further includes at least one of the following information for the station: an adjustment value of the transmission power and an adjustment value of the second threshold.

29. The station according to claim 26, wherein the sending unit is specifically configured to:

determining the allowed interference margin of the access points or the stations of other basic service sets;

and sending a data packet to the access point through the channel by adopting the sending power according to the message.

30. The station according to claim 26, wherein the sending unit is further configured to send spatial multiplexing capability information to the access point before the receiving unit receives the message sent by the access point, and the spatial multiplexing capability information includes at least one of the following information: allowing spatial multiplexing transmission, maximum transmission power, adjustment information of transmission power, and adjustment information of the second threshold.

31. The station of claim 30, wherein the receiving unit is further configured to receive a spatial multiplexing capability information reporting request sent by the access point before the sending unit sends spatial multiplexing capability information to the access point.

32. The station of claim 26, wherein the message is in a frame format of a spatial multiplexing trigger frame.