CN106233790B

CN106233790B - Method and device for transmitting indication message to be received

Info

Publication number: CN106233790B
Application number: CN201580006330.4A
Authority: CN
Inventors: 树贵明; 丁志明; 乔登宇; 杜振国; 李彦淳; 蓝洲; 李云波
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-04-07
Filing date: 2015-04-07
Publication date: 2020-02-14
Anticipated expiration: 2035-04-07
Also published as: WO2016161547A1; CN106233790A

Abstract

A transmission method of an indication message to be received comprises the following steps: an access point transmits a broadcast message, the broadcast message comprising: indicating bitmap information to be transmitted, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM; the access point sends the first trigger message according to the sending time information of the first trigger message; and the access point receives an indication message to be received, which is sent by at least one station to be received in the first station group to be received according to the first trigger message and by using a multi-user transmission mechanism.

Description

Method and device for transmitting indication message to be received

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting an indication message to be received.

Background

In a wireless local area network, a station normally operates in a power saving mode for saving power, and when the station operates in the power saving mode, the operating state of the station alternates between an Awake (Awake) state and a sleep (Doze) state according to a certain rule. When in the Doze state, the power consumption of the station may be reduced to a low level, but may not receive messages sent by the access point.

In order to enable the access point to transmit the arriving data to the station as soon as possible in time, a data Transmission Indication Map (TIM) downlink data transmission mechanism is defined in the current WIreless FIdelity (WiFi) 802.11 standard. According to the TIM mechanism, a station operating in a power saving mode needs to periodically wake up to receive a broadcast message broadcast by an access point, and the access point indicates to the station whether there is cached data to wait for transmission to the station through a TIM field in the periodically broadcast message. Specifically, the TIM field is composed of a number of binary bits, where the serial number of each binary bit corresponds to an Association Identifier (AID) of a station, and when a certain bit is set to 1, it indicates that the station corresponding to the AID has data buffered at the access point, and when the station finds that the data buffered at the access point through a broadcast message, after receiving the broadcast message, the station sends a Power saving Poll (PS-Poll, Power Save Poll) to the access point in a free contention manner in an idle channel to receive an indication message, and then is in an awake state, waits for receiving data sent by the access point, and enters a Power saving sleep state until the data is received.

In the prior art, an access point may set a plurality of indication bits in the TIM to "1" and indicate that there is buffered data to a plurality of stations at the same time, and at this time, a plurality of stations will send a PS-Poll message to the access point in a free contention channel manner at the same time, where the general flow of the channel free contention mechanism is as follows: the station firstly monitors whether the channel is idle, if the idle Time of the channel exceeds a certain Time (such as AIFS, arbitration frame interval), the station starts a backoff mechanism, namely randomly selects a backoff Time value (taking a Time slot as a unit) between the set minimum backoff Time and the set maximum backoff Time, and simultaneously starts a countdown timing clock (taking the Time slot as a unit), when the accumulated idle Time of the channel reaches the backoff Time value selected by the station, the countdown timing clock is reduced to 0, and the station is triggered to send a PS-Poll message to the access point.

As can be seen from the above-mentioned channel free contention procedure, when two stations happen to randomly select the same back-off time value, PS-Poll messages sent by the two stations at the same time will collide, in which case the stations will perform channel contention again. Since channel contention among multiple stations is performed on the entire access point working channel, it is obvious that collision of PS-Poll messages inevitably causes waste of the entire channel resources.

Disclosure of Invention

The embodiment of the invention provides a transmission method and a device of an indication message to be received, which are used for a plurality of stations to synchronously send the indication message to be received to an access point.

A method for transmitting an indication message to be received according to a first aspect of an embodiment of the present invention includes:

an access point transmits a broadcast message, the broadcast message comprising: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM;

the access point sends the first trigger message according to the sending time information of the first trigger message;

and the access point receives an indication message to be received, which is sent by at least one station to be received in the first station group to be received according to the first trigger message and by using a multi-user transmission mechanism.

In a first possible implementation method of the first aspect, the to-be-received station group information includes:

the identification information of the starting station to be received of the station group to be received, or the identification information of the ending station to be received of the station group to be received.

In a second possible implementation of the method of the first aspect, the broadcasting message further includes:

and the number information of the stations to be received contained in the station group to be received.

In a third possible implementation method of the first aspect, the first trigger message includes:

and sending time information of a second trigger message, where the second trigger message is used to instruct the to-be-received stations supporting the multi-user transmission mechanism in a second to-be-received station group to send to-be-received instruction messages to the access point at the same time.

In a fourth possible implementation of the method of the first aspect,

the first trigger message includes: first station group indication information to be received;

the first station group indication information to be received includes: a first initial association identifier or first station group identifier information to be received, where the first initial association identifier is an association identifier of a station to be received with a smallest association identifier in the first station group to be received;

and/or the presence of a gas in the gas,

the first station group to be received indication information includes a station type indication bit table, each bit in the station type indication bit table corresponds to one station to be received in the first station group to be received, and each bit in the station type indication bit table is used for indicating whether the corresponding station to be received can send the indication message to be received.

With reference to the fourth possible implementation method of the first aspect, in a fifth possible implementation method, the first to-be-received station group indication information includes: and indicating the allocation information of the channel resources of the indication message to be received corresponding to the first site group to be received.

With reference to the first aspect and the first to fifth possible implementation methods of the first aspect, in a sixth possible implementation method, the first trigger message includes:

the first channel resource indication information is indication information of channel resources for a first station group to be received to send indication messages to be received, and the channel resources include channel resource units for the stations to be received of the first station group to be received to send the indication messages to be received.

A method for transmitting an indication message to be received according to a second aspect of the embodiments of the present invention includes:

a station to be received receives a broadcast message sent by an access point, wherein the broadcast message comprises: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM;

the station to be received wakes up when the trigger message corresponding to the station to be received is sent according to the sending time information of the first trigger message, and receives the trigger message corresponding to the station to be received;

and the station to be received sends an indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received.

In a first possible implementation method of the second aspect, before the receiving the trigger message corresponding to the station to be received, the method includes:

the station to be received determines a station group to be received and a trigger message corresponding to the station to be received according to the TIM and the first station group to be received information;

the station to be received wakes up when the first trigger message is sent according to the sending time information of the first trigger message, and receives the first trigger message;

and the station to be received determines that the first trigger message is the trigger message corresponding to the station to be received, and sends an indication message to be received to the access point by using a multi-user transmission mechanism.

In a second possible implementation of the method of the second aspect,

the broadcast message further includes: station group information to be received corresponding to each station group to be received except the first station group to be received;

before the receiving of the trigger message corresponding to the station to be received, the method includes:

the station to be received determines a station group to be received and a trigger message corresponding to the station to be received according to the TIM and the station group information to be received corresponding to each station group to be received;

the first trigger message includes: sending time information of a second trigger message, where the second trigger message is used to instruct a station to be received supporting a multi-user transmission mechanism in a second station group to be received to send a message indicating that the station is to be received to the access point at the same time;

the station to be received wakes up when the trigger message corresponding to the station to be received is sent according to the sending time information of the first trigger message, and receives the trigger message corresponding to the station to be received, including:

the station to be received judges whether the first trigger message is the trigger message corresponding to the station to be received, if so, the station to be received uses a multi-user transmission mechanism to send an indication message to be received to the access point; if not, the station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the second trigger message included in the first trigger message.

In a third possible implementation of the method of the second aspect,

the first trigger message includes: the second trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the second station group to be received to simultaneously send the indication message to be received to the access point;

the station to be received judges whether the first trigger message comprises station group indication information to be received corresponding to the station to be received, if not, the station to be received receives the trigger message corresponding to a second station group to be received according to the sending time information of a second trigger message included in the first trigger message; and if so, sending the indication message to be received to the access point by using a multi-user transmission mechanism.

In a fourth possible implementation of the method of the second aspect,

the first trigger message includes: the station group indication information to be received comprises allocation information of channel resources indicating the indication message to be received corresponding to the station group to be received;

the station to be received sends an indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received, and the method comprises the following steps:

the station to be received determines the channel resource corresponding to the indication message to be received sent by the station to be received according to the first indication message to be received group;

and the station to be received sends an indication message to be received to the access point by using the channel resource.

In a fifth possible implementation of the method of the second aspect,

the first trigger message includes: first channel resource indication information and first station group indication information to be received;

the channel resource indication information is indication information of channel resources of a first station group to be received for sending indication messages to be received, and the channel resources comprise channel resource units used for the stations to be received of the first station group to be received for sending the indication messages to be received;

the first station group to be received indication information comprises allocation information which indicates channel resources corresponding to the first station group to be received and used for sending the indication message to be received;

the station to be received determines the channel resource corresponding to the indication message to be received sent by the station to be received according to the first channel resource indication information and the first station group indication information to be received;

The method for transmitting the indication message to be received provided by the third aspect of the embodiment of the present invention includes:

a station to be received receives a broadcast message sent by an access point, wherein the broadcast message comprises: the method comprises the steps of sending indication bitmap TIM information to be transmitted, at least two station groups to be received and sending time information of trigger messages corresponding to the at least two station groups to be received, wherein a first station group to be received corresponds to a first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM;

the station to be received wakes up when the trigger message corresponding to the station to be received is sent according to the sending time information of the trigger message corresponding to the at least two station groups to be received, and receives the trigger message corresponding to the station to be received;

In a first possible implementation of the method of the third aspect,

In a second possible implementation of the method of the third aspect,

the channel resource indication information is indication information of channel resources of a first station group to be received for sending indication messages to be received, and the channel resources for sending the indication messages to be received comprise channel resource units used for the stations to be received of the first station group to be received for sending the indication messages to be received;

the station to be received determines the channel resource corresponding to the indication message to be received sent by the station to be received according to the indication information of the channel resource and the indication information of the first station group to be received;

An access point provided in a fourth aspect of the present invention includes:

a transmitting unit configured to transmit a broadcast message, the broadcast message including: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM;

the sending unit is further configured to send the first trigger message according to the sending time information of the first trigger message;

and a receiving unit, configured to receive an indication message to be received, sent by at least one station to be received in the first station group according to the first trigger message and using a multi-user transmission mechanism.

In a first possible implementation method of the fourth aspect, the station group to be received information includes:

In a second possible implementation method of the fourth aspect, the broadcasting message further includes:

In a third possible implementation method of the fourth aspect, the first trigger message includes:

In a fourth possible implementation of the method of the fourth aspect,

and/or the presence of a gas in the gas,

the first station group indication information to be received includes: and each bit in the site type indication bit table corresponds to a site to be received in the first site group to be received, and each bit in the site type indication bit table is used for indicating whether the corresponding site to be received can send the indication message to be received.

With reference to the fourth possible implementation method of the fourth aspect, in a fifth possible implementation method, the first to-be-received station group indication information further includes allocation information indicating channel resources of an indication message to be received, which correspond to the first to-be-received station group.

With reference to the fourth aspect and the first to fifth possible implementation of the fourth aspect, in a sixth possible implementation of the method, the first trigger message includes:

A station provided in a fifth aspect of the embodiments of the present invention includes:

a message receiving unit, configured to receive a broadcast message sent by an access point, where the broadcast message includes: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM;

the message receiving unit is further configured to wake up when the corresponding trigger message is sent according to the sending time information of the first trigger message, and receive the corresponding trigger message;

and the message sending unit is used for sending the indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the site to be received.

In a first possible implementation of the method of the fifth aspect,

a first determining unit, configured to determine, according to the TIM and the first station group to be received information, a station group to be received and a trigger message, where the station group to be received corresponds to the station to be received.

In a second possible implementation of the method of the fifth aspect,

the broadcast message further includes: station group information to be received corresponding to at least two station groups to be received except the first station group to be received;

the station further comprises:

a second determining unit, configured to determine, according to the TIM and to-be-received station group information corresponding to at least two to-be-received station groups, a to-be-received station group corresponding to the to-be-received station and a trigger message;

the station further comprises: a first judgment unit;

the first judging unit is configured to judge whether the first trigger message is a trigger message corresponding to the station to be received after the message receiving unit wakes up and receives the first trigger message when the first trigger message is sent according to the sending time information of the first trigger message;

the message sending unit is specifically configured to send a to-be-received indication message to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the to-be-received station when the first trigger message is the trigger message corresponding to the to-be-received station;

the message receiving unit is further configured to receive, when the first trigger message is not the trigger message corresponding to the station to be received, a trigger message corresponding to a second station group to be received according to the sending time information of a second trigger message in the first trigger message.

In a third possible implementation of the method of the fifth aspect,

the station further comprises: a second judgment unit;

the second determining unit is configured to determine, after the message receiving unit wakes up and receives a first trigger message when the first trigger message is sent according to the sending time information of the first trigger message, whether the first trigger message includes indication information of a to-be-received station group corresponding to the to-be-received station, and the message sending unit is specifically configured to send the indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the to-be-received station when the first trigger message includes the indication information of the to-be-received station group corresponding to the to-be-received station;

the message receiving unit is further configured to receive, when the first trigger message does not include indication information of a station group to be received corresponding to the station to be received, a trigger message corresponding to a second station group to be received according to sending time information of a second trigger message in the first trigger message.

In a fourth possible implementation of the method of the fifth aspect,

the station further comprises: a first channel determination unit;

the first channel determining unit is configured to determine, by the first station to be received group indication information, a channel resource corresponding to the indication message to be received sent by the station to be received,

the message sending unit is specifically configured to: and sending a message indicating to be received to the access point by using the channel resource determined by the first channel determination unit.

In a fifth possible implementation of the method of the fifth aspect,

the station further comprises: a second channel determination unit;

the first channel resource indication information is indication information of channel resources of a first station group to be received for sending indication messages to be received, and the channel resources for sending the indication messages to be received comprise channel resource units used for the stations to be received of the first station group to be received for sending the indication messages to be received;

the second channel determining unit determines, according to the first channel resource indication information and the first station group indication information to be received, a channel resource corresponding to the indication message to be received sent by the station to be received;

the message sending unit is specifically configured to: and sending a message to be received indication to the access point by using the channel resource determined by the second channel determination unit and using a multi-user transmission mechanism.

A sixth aspect of the embodiments of the present invention provides a station, including:

a message receiving unit, configured to receive a broadcast message sent by an access point, where the broadcast message includes: the method comprises the steps that indication bitmap TIM information to be transmitted is composed of at least two pieces of information of station groups to be received and sending time information of trigger messages corresponding to the at least two station groups to be received, wherein a first station group to be received corresponds to a first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM;

the message receiving unit is further configured to wake up when the trigger message corresponding to the station to be received is sent according to the sending time information of the trigger messages corresponding to the at least two station groups to be received, and receive the trigger message corresponding to the station to be received;

In a first possible implementation of the method of the sixth aspect,

the station further comprises: a first channel determination unit;

the first channel determining unit is configured to determine, according to the first station group to be received indication information, a channel resource corresponding to the indication message to be received sent by the station to be received;

the message sending unit is specifically configured to: and sending a message to be received indication to the access point by using the channel resource determined by the first channel determination unit and using a multi-user transmission mechanism.

In a second possible implementation of the method of the sixth aspect,

the station further comprises: a second channel determination unit;

the first channel resource indication information and the first station group to be received send the indication information of the channel resource of the indication message to be received, and the channel resource for sending the indication message to be received comprises a channel resource unit used for the station to be received of the first station group to be received to send the indication message to be received;

the second channel determining unit determines, according to the channel resource indication information and the first station group indication information to be received, a channel resource corresponding to the indication message to be received sent by the station to be received;

the message sending unit is specifically configured to: and sending a message to be received indication to the access point by using a multi-user transmission mechanism by using the channel resource determined by the second channel determination unit.

An access point provided in a seventh aspect of the embodiments of the present invention includes:

a transmitter, a receiver and a processor;

the processor is configured to send a broadcast message via the transmitter, the broadcast message comprising: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM; sending the first trigger message according to the sending time information of the first trigger message;

the processor is further configured to receive, by the receiver, an indication message to be received, which is sent by at least one station to be received in the first station group according to the first trigger message and by using a multi-user transmission mechanism.

The station provided in the eighth aspect of the embodiment of the present invention includes: a transmitter, a receiver and a processor;

the processor is configured to receive, by the receiver, a broadcast message sent by an access point, the broadcast message including: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM; awakening when the corresponding trigger message is sent according to the sending time information of the first trigger message, and receiving the corresponding trigger message;

the processor is configured to send, by the transmitter, a to-be-received indication message to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the to-be-received station.

The station provided by the ninth aspect of the embodiment of the present invention includes: a transmitter, a receiver and a processor;

the processor is configured to receive, by the receiver, a broadcast message sent by an access point, the broadcast message including: the method comprises the steps of sending indication bitmap TIM information to be transmitted, at least two station groups to be received and sending time information of trigger messages corresponding to the at least two station groups to be received, wherein a first station group to be received corresponds to a first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM; awakening when the corresponding trigger message is sent according to the sending time information of the corresponding trigger message, and receiving the corresponding trigger message;

According to the technical scheme, the embodiment of the invention has the following advantages:

in the embodiment of the invention, a wireless channel frequency spectrum working between an access point and a site is divided into a plurality of sub-channels, and when the access point sends a broadcast message to the site, the broadcast message comprises first to-be-received site group information and sending time information of a first trigger message; the first station group information to be received is used to indicate grouping information of stations to be received in the first station group to be received, wherein a subchannel in the wireless channel spectrum can be used by a station to be received that supports multiple user mechanisms in a station group to be received, and therefore, each station that supports a multi-user transmission mechanism in the station group to be received can select one subchannel to transmit an indication message to be received, and an access point can simultaneously receive messages transmitted by multiple stations.

After the first station group to be received of the access point sends the first trigger message, each station supporting the multi-user transmission mechanism of the multi-user transmission mechanism in the first station group to be received will send the indication message to be received to the access point in a unified way according to the indication of the first trigger message. In the embodiment of the invention, the access point can uniformly receive the indication messages to be received, which are simultaneously sent by a plurality of stations, through a multi-user transmission mechanism, thereby avoiding the waste of channel resources caused by message collision in the free competition process of the channel.

Drawings

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

Fig. 1 is another schematic flow chart of a transmission method of an indication message to be received according to an embodiment of the present invention;

fig. 2 is another flow chart illustrating a transmission method of an indication message to be received according to an embodiment of the present invention;

fig. 3 is another flowchart illustrating a transmission method of an indication message to be received according to an embodiment of the present invention;

fig. 4 is another flowchart illustrating a transmission method of an indication message to be received according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating a data structure of a broadcast message according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating a data structure of a trigger message according to an embodiment of the present invention;

fig. 7 is another flowchart illustrating a transmission method of an indication message to be received according to an embodiment of the present invention;

fig. 8 is another flowchart illustrating a transmission method of an indication message to be received according to an embodiment of the present invention;

fig. 9 is another flowchart illustrating a transmission method of an indication message to be received according to an embodiment of the present invention;

fig. 10 is another flowchart illustrating a transmission method of a to-be-received indication message according to an embodiment of the present invention;

fig. 11 is another flowchart illustrating a transmission method of an indication message to be received according to an embodiment of the present invention;

FIG. 12 is a diagram illustrating another data structure of a trigger message according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of an access point in an embodiment of the present invention;

FIG. 14 is a schematic diagram of a site in an embodiment of the invention;

fig. 15 is a schematic diagram of a computer structure based on a transmission method of an indication message to be received in the 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention is applied to a scene that the access point transmits downlink data to the station in the wireless local area network. In a working scene of the wireless local area network, a station is in a sleep state most of time, an access point and the station appoint time, the station wakes up periodically to receive a broadcast message sent by the access point, the broadcast message contains a TIM field, specifically, the TIM field consists of a plurality of binary bits, the serial number of each binary bit corresponds to an AID of the station to be received, when a certain bit is set to be 1, the station corresponding to the AID has cached data in the access point, and the station needs to wake up and download the cached data. When the station receives the broadcast message, it finds that the indication bit corresponding to the station in the TIM field of the broadcast message is set to 1, and the station needs to send an indication message to be received to the access point, so as to indicate that the station is currently in an awake state and can receive the cache data, and request the access point to allocate a channel resource for issuing the cache data, and send downlink cache data on the corresponding channel resource.

In practical applications, since the access point buffers data for multiple stations at the same time, a need arises for multiple stations to send indication messages to be received to the access point, and in this process, a problem of channel resource allocation for multiple stations to send indication messages to be received may be involved.

One embodiment of the method for transmitting a to-be-received indication message according to the present invention may include: an access point transmits a broadcast message, the broadcast message comprising: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM; the access point sends the first trigger message according to the sending time information of the first trigger message; and the access point receives an indication message to be received, which is sent by at least one station to be received in the first station group to be received according to the first trigger message and by using a multi-user transmission mechanism.

It should be noted that, in the embodiment of the present invention, a station group to be received corresponds to a trigger message one to one, that is, a first station group to be received corresponds to the first trigger message, where the first trigger message is used to indicate that a station to be received, which supports a multi-user transmission mechanism, in the first station group to be received simultaneously sends an indication message to be received to the access point; similarly, the second station group to be received corresponds to the second trigger message, and the second trigger message is used to indicate the station to be received supporting the multi-user transmission mechanism in the second station group to be received to simultaneously send an indication message to be received to the access point, and so on.

The second station group to be received may refer to a station group to be received next to the first station group to be received, or any station group to be received except the first station group to be received, and is not limited herein.

Illustratively, the first trigger message may include: first station group indication information to be received or first station group identification information to be received; the first initial association identifier is the association identifier of the station to be received with the smallest association identifier in the first station group to be received. Similarly, it can be understood that the to-be-received station group indication information or the to-be-received station group identification information included in any trigger message corresponds to a trigger message carrying the to-be-received station group indication information or the to-be-received station group identification information (for example, the second trigger message includes the second to-be-received station group indication information).

Further, the first station group indication information to be received includes: and indicating the allocation information of the channel resources of the indication message to be received corresponding to the first site group to be received. Similarly, the indication information of the second station group to be received includes allocation information of channel resources indicating the indication message to be received corresponding to the second station group to be received, and so on.

Further, the first trigger message further includes: the first channel resource indication information is indication information of channel resources for a first station group to be received to send indication messages to be received, and the channel resources include channel resource units for the stations to be received of the first station group to be received to send the indication messages to be received. Similarly, the second trigger message includes second channel resource indication information, where the second channel resource indication information is indication information of channel resources for the second station group to be received to send the indication message to be received, and so on.

Referring to fig. 1, an embodiment of a method for transmitting a to-be-received indication message according to an embodiment of the present invention includes:

101. the access point sends a broadcast message;

an access point sends a broadcast message to a station to be received, wherein the broadcast message comprises: transmitting an indication bitmap, first station group information to be received and sending time information of a first trigger message; the trigger message is used for indicating the sites to be received in the same site group to be received to send indication messages to be received to the access point at the same time. The station to be received is a station indicating downlink data in the TIM.

Specifically, the first trigger message is a trigger message corresponding to the first group of stations to be received. Further, in this embodiment of the present invention, the second trigger message is a trigger message corresponding to the second station group to be received, and so on.

Optionally, the station group information to be received may be: the identification information of the starting station to be received of the station group to be received, or the identification information of the end station to be received of the station group to be received, and the station number information included in the station group to be received, where the identification of the station to be received includes but is not limited to: one or more of the association identifier of the station to be received, the sequence number of "1" in the TIM corresponding to the station to be received, the Media Access Control (MAC) address of the station to be received, and the like; the station number information included in the station groups to be received may specifically include that one number may indicate that each station group to be received includes stations of the same number, where the number of stations to be received included in each station group to be received is the indicated number, and may also indicate, for each station group to be received, the number information of stations to be received included in each station group to be received, where the number of each station group to be received may be the same or different.

The sending time information is used for indicating the time of the access point sending the corresponding trigger message.

In the embodiment of the invention, the wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of orthogonal sub-carriers, and one or more sub-carriers form a sub-channel. The time required for the station to be received to send the indication message to be received on an uplink subchannel is referred to as a channel resource unit for sending the indication message to be received together with the subchannel (that is, the time required for sending the message and the frequency spectrum corresponding to the subchannel are included).

Specifically, the broadcast message may be a Beacon (Beacon) message in practical application, or may be a message in other formats, which is not limited herein.

Specifically, the TIM is used to indicate whether each station currently has data cached in the access point; further, the TIM may be a binary sequence, where each bit in the binary sequence corresponds to an AID of each station, and when a binary number of one bit is set to "1", it indicates that a corresponding station has data cached in the access point; when one of the binary digits is set to "0", it indicates that the corresponding station has no data buffered in the access point. In this embodiment of the present invention, a station with a flag bit set to "1" in the TIM is a station to be received.

Specifically, the first station group information to be received is used to indicate grouping information of stations to be received in the first station group to be received, where a subchannel in the radio channel spectrum may be used by a station to be received that supports multiple user transmission mechanisms (such as an ofdma transmission mechanism) in a station group to be received, so that each station that supports multiple user transmission mechanisms in the station group to be received may select one subchannel to send a message to be received, and the access point may receive messages sent by multiple stations that support multiple user transmission mechanisms simultaneously by using a multiple user transmission mechanism. Multi-user transmission mechanism

Specifically, the broadcast message at least includes information of a first to-be-received station group and transmission time information of a corresponding trigger message, where the trigger message is used to instruct a to-be-received station of the same to-be-received station group to simultaneously transmit a to-be-received indication message to the access point, where each to-be-received station group corresponds to one trigger message, and the first trigger message is a trigger message corresponding to the first to-be-received station group. Optionally, the broadcast message may include: and the information of at least one other station group to be received except the first station group to be received and the sending time information of the corresponding trigger message.

Specifically, the indication message to be received is an indication message sent by the station to be received to the access point, and is used to indicate that the station to be received is currently in an awake state and can receive downlink cache data, and request the access point to allocate a channel resource for transmitting downlink data, and then receive the downlink data on the downlink channel resource. Optionally, the indication message to be received may be a PS-Poll message.

Specifically, the multi-user transmission mechanism refers to that multiple stations to be received communicate with one access point simultaneously in a frequency division multiple access (e.g., orthogonal frequency division multiple access) or multi-user (multiple input multiple output) transmission mode on a certain spectrum resource. The multi-user transmission mechanism includes, but is not limited to: orthogonal Frequency Division Multiple Access (OFDMA) scheme, Multiple-Input Multiple-Output (MU MIMO) scheme, and Multiple-user MIMO (Multi-Input Multi-Output) scheme.

102. The access point sends a first trigger message according to the sending time information of the first trigger message;

specifically, after the station receives the broadcast message, if the TIM finds that the station itself has downlink cache data to transmit, and learns that the station itself belongs to the first station group through the first station group information to be received, the station is in an awake state at the time of sending the first trigger message, so as to receive the first trigger message. Optionally, if the station finds that the station itself does not have downlink cache data to be transmitted through the TIM, the station may not perform processing; if the station learns that the station belongs to the non-first station group through the first station group information to be received, the station needs to receive a trigger message corresponding to the station group to be received where the station is located. .

Specifically, the trigger message may be a trigger message, or may also be a message in another format, which is not limited herein. Optionally, the trigger message may include: one or more of identification information of the trigger message, station group information to be received corresponding to the trigger message, sending time information of the next trigger message and channel resource indication information; the specific conditions are determined according to actual conditions, and the method is not limited in the specific conditions.

In the embodiment of the present invention, before the access point sends the broadcast message, the sending time information of each trigger message may be set according to actual requirements; moreover, if the situation is changed (for example, a delay occurs) in the actual application process, the sending time information of the trigger message which is not sent can also be dynamically adjusted. Therefore, in the actual application process, only the sending time information of the first trigger message or the sending time information of the trigger message corresponding to each station group to be received can be set in the broadcast message; when the trigger message is sent, the trigger message may or may not include sending time information of a next trigger message, which is determined according to the actual situation and is not limited herein. For example, when the broadcast message includes the transmission time information of each trigger message, the trigger message may not include the transmission time information of the next trigger message; when the transmission time information of each trigger message is not included in the broadcast message, the trigger message may include transmission time information of the next trigger message.

103. The access point receives at least one station to be received in the first station group to be received according to the first trigger message and uses a multi-user transmission mechanism to send an indication message to be received;

specifically, after the station to be received receives the first trigger message, the time for sending the indication message to be received is determined according to the first trigger message. Optionally, in practical applications, the station to be received may pre-agree with the access point for a duration, for example, a time of a short frame interval, and after receiving the first trigger message and after the agreed duration, each station to be received simultaneously sends the indication message to be received to the access point. Optionally, the first trigger message may also include sending indication information of an indication message to be received, and each station to be received determines, according to the indication of the sending indication information of the indication message to be received, a time for uniformly sending the receiving indication message, for example, the sending indication information of the indication message to be received is 14: 15: 01 seconds, and then the station to be received in each first station group to be received uniformly sends the indication message to be received to the access point at the time of 14: 15: 01 seconds after receiving the first trigger message.

104. And the access point sends the resource allocation information to the station to be received.

The access point sends resource allocation information to the station to be received, wherein the allocation information is used for indicating the channel resource for downloading the cache data to the station to be received, so that the station to be received downloads the cache data in the channel resource indicated by the allocation information.

After the first station group to be received of the access point sends the first trigger message, each station supporting the multi-user transmission mechanism of the multi-user transmission mechanism in the first station group to be received sends an indication message to be received to the access point according to the indication of the first trigger message. In the embodiment of the invention, the access point can uniformly receive the indication messages to be received, which are simultaneously sent by a plurality of stations, through a multi-user machine transmission system, thereby avoiding the waste of channel resources caused by message collision in the free competition process of the channel.

At the ap side, it is assumed that each station to be received in the station group to be received supports a multi-user transmission mechanism, and the station group to be received information included in the broadcast message only includes the first station group to be received information, and the trigger message sending time information included in the broadcast message only includes the first trigger message sending time information, referring to fig. 2, another embodiment of the method for transmitting the indication message to be received in the embodiment of the present invention includes:

201. the access point sends a broadcast message;

when the data of a plurality of stations to be received are cached in the access point, the access point sends a broadcast message, wherein the broadcast message comprises: the method comprises the steps of transmitting an indication bitmap, first station group information to be received and sending time information of a first trigger message, wherein the trigger message is used for indicating the stations to be received of the same station group to be received to send the indication message to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

202. The access point sends a first trigger message according to the sending time information of the first trigger message;

the first trigger message includes: and sending time information of the trigger message corresponding to the second station group to be received.

Specifically, after the station receives the broadcast message, if the TIM finds that the station itself has downlink cache data to transmit, and learns that the station itself belongs to the first station group through the first station group information to be received, the station is in an awake state at the time of sending the first trigger message, so as to receive the first trigger message. Optionally, if the station finds that the station itself does not have downlink buffer data to be transmitted through the TIM, the station may not perform processing.

If the station confirms that the station is a station to be received through the TIM, and learns that the station belongs to a non-first station group through the first station group information to be received, the station to be received needs to wake up when sending the second trigger message and receive the second trigger message according to the sending time information of the second trigger message included in the first trigger message because the broadcast message does not include the station group information to be received corresponding to the station.

Specifically, the trigger message may be a trigger message, or may also be a message in another format, which is not limited herein. Optionally, the trigger message may include: one or more of identification information of the trigger message, indication information of a station group to be received corresponding to the trigger message, sending time information of the next trigger message and channel resource indication information; the specific conditions are determined according to actual conditions, and the method is not limited in the specific conditions.

Optionally, the trigger message may further include: channel resource indication information; the channel resource indication information is indication information of channel resources of a station group to be received corresponding to the trigger message, which sends the indication message to be received, and the channel resources for sending the indication message to be received include at least one channel resource unit for the station to be received to send the indication message to be received. It can be understood that, in practical applications, if the access point and the station to be received have agreed the channel resource in advance, the trigger message may not include the channel resource indication information.

203. The access point receives at least one station to be received in the first station group to be received according to the first trigger message and uses a multi-user transmission mechanism to send an indication message to be received;

in practical application, after receiving a trigger message, stations to be received in a station group to be received determine respective channel resources for sending an indication message to be received according to the trigger message.

Specifically, if the access point and the station to be received agree on channel resources, the station to be received determines, according to preset channel resources and the group indication information of the station to be received, that the station to be received sends the channel resources corresponding to the indication message to be received, and then uses the channel resources to send the indication message to be received to the access point.

Optionally, if the access point and the station to be received do not agree on the channel resource, the trigger message includes channel resource indication information; and the station to be received determines the channel resource corresponding to the indication message to be received sent by the station to be received according to the channel resource indication information and the indication information of the station group to be received, and then sends the indication message to be received to the access point by using the channel resource.

204. The access point sends resource allocation information to the stations to be received in the first station group to be received;

the access point sends resource allocation information to the station to be received in the first station group to be received, wherein the allocation information is used for indicating the channel resource for downloading the cache data to the station to be received, so that the station to be received downloads the cache data in the channel resource indicated by the allocation information.

205. The access point sends a second trigger message;

it is understood that step 205 occurs after step 202, but has no strict timing relationship with

steps

203 and 204.

Specifically, the second trigger message may include: and the indication information of the station group to be received and the sending time information of the trigger message corresponding to the second station group to be received.

The station group indication information to be received includes: the initial association identifier is the association identifier of the station to be received with the smallest association identifier in the stations to be received corresponding to the trigger message; further, the method can also comprise the information of the number of the stations to be received of the station group to be received; optionally, the number of stations to be received in each station group to be received may be the same or different, that is, the information about the number of stations to be received specifically includes that one number indicates that each station group to be received includes the same number of stations, where the number of stations to be received included in each station group to be received is the indicated number, and may also indicate, for each station group to be received, information about the number of stations to be received included in each station group to be received, where the number of stations to be received may be the same or different.

And/or the presence of a gas in the gas,

the station group indication information to be received includes: and each bit in the site type indication bit table corresponds to a site to be received in the site group to be received corresponding to the trigger message, and each bit in the site type indication bit table is used for indicating whether the corresponding site to be received can send the indication message to be received.

Illustratively, after the station to be received receives the trigger message:

1) the station to be received judges whether the currently received trigger message comprises the indication information of the station group to be received corresponding to the station to be received, if not, the step 2) is executed; if yes, executing step 3);

2) the station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the trigger message corresponding to the second station group to be received included in the currently received trigger message, and executes the step 1);

3) and the site to be received determines that the currently received trigger message is the trigger message corresponding to the site to be received.

206. The access point receives at least one station to be received in the second station group to be received according to the second trigger message and uses a multi-user transmission mechanism to send an indication message to be received;

optionally, if there are multiple station groups to be received, the access point may continue to send the trigger message and receive the indication message to be received according to the above method.

207. And the access point sends the resource allocation information to the stations to be received in the second station group to be received.

And the access point sends resource allocation information to the stations to be received in the second station group to be received, wherein the allocation information is used for indicating the channel resources for downloading the cache data to the stations to be received, so that the stations to be received download the cache data in the channel resources indicated by the allocation information.

In a site side, it is assumed that each site to be received in a site group to be received supports a multi-user transmission mechanism, and the site group to be received information included in the broadcast message only includes first site group to be received information, and the trigger message sending time information included in the broadcast message only includes the first trigger message sending time information, referring to fig. 3, another embodiment of the method for transmitting an indication message to be received in the embodiment of the present invention includes:

301. a station to be received receives a broadcast message sent by an access point;

a station to be received receives a broadcast message sent by an access point, wherein the broadcast message comprises: the method comprises the steps of transmitting an indication bitmap, first station group information to be received and sending time information of a first trigger message, wherein the trigger message is used for indicating the stations to be received of the same station group to be received to send the indication message to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

For example, after receiving the broadcast message, the station checks the TIM in the broadcast message, and if the binary system corresponding to the station in the TIM is "0", the station does not need to process the TIM; if the binary system corresponding to the station in the TIM is "1", the station is determined to be a station to be received, and step 302 is performed.

302. The station to be received wakes up when the first trigger message is sent according to the sending time information of the first trigger message, and receives the first trigger message;

specifically, the first trigger message includes: and sending time information of the trigger message corresponding to the second station group to be received.

303. The method comprises the steps that a to-be-received station judges whether currently-received trigger information comprises to-be-received station group indication information corresponding to the to-be-received station;

the station to be received judges whether the currently received trigger message includes the station group indication information to be received corresponding to the station to be received, if not, step 304 is executed; if yes, the station to be received determines that the currently received trigger message is the trigger message corresponding to the station to be received, and step 305 is executed.

In practical application, if the broadcast message does not include the information of the station groups to be received corresponding to the station groups to be received and does not include the sending time of the trigger message corresponding to the station groups to be received; the corresponding trigger message sent by the access point includes the corresponding indication information of the station group to be received and the sending time information of the trigger message corresponding to the second station group to be received.

The station group indication information to be received includes: the initial association identifier is the association identifier of the station to be received with the smallest association identifier in the stations to be received corresponding to the trigger message; further, the method can also comprise the information of the number of the stations to be received of the station group to be received; optionally, the number of stations to be received in each station group to be received may be the same, or may not be the same, that is, the information about the number of stations to be received may only include one number for indicating that each station group to be received includes the same number of stations, or include a plurality of numbers corresponding to different numbers of stations included in the plurality of station groups to be received.

And/or the presence of a gas in the gas,

304. The station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the trigger message corresponding to the second station group to be received included in the currently received trigger message;

the station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the trigger message corresponding to the second station group to be received included in the currently received trigger message, and performs step 303.

305. The station to be received sends an indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received;

306. And the station to be received receives the resource allocation information sent by the access point.

And the station to be received receives the resource allocation information sent by the access point and downloads the cache data in the channel resource indicated by the allocation information.

At the ap side, it is assumed that each station to be received in the station group to be received supports a multi-user transmission mechanism, and the station group to be received information included in the broadcast message is station group information to be received corresponding to each station group to be received, and the sending time information of the trigger message included in the broadcast message is sending time information of the trigger message corresponding to each station group to be received, please refer to fig. 4, where another embodiment of the to-be-received indication message transmission method in the embodiment of the present invention includes:

401. the access point sends a broadcast message;

when the data of a plurality of stations to be received are cached in the access point, the access point sends a broadcast message, wherein the broadcast message comprises: the method comprises the steps of transmitting an indication bitmap, information of station groups to be received corresponding to the station groups to be received, and sending time information of trigger messages corresponding to the station groups to be received, wherein the trigger messages are used for indicating the stations to be received of the same station group to be received to send indication messages to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

For example, referring to fig. 5, in fig. 5, the TIM is a multi-bit binary sequence, each bit in the binary sequence corresponds to an AID of each station to be received, and when a binary number of one bit is set to "1", it indicates that the corresponding station to be received has data buffered in the access point; when one of the binary digits is set to "0", it indicates that the corresponding station to be received has no data buffered in the ap. Trigger IEs (Information elements) are Information elements of the Trigger message, the Trigger IE includes Information of station groups to be received (e.g., Group1, Group2, etc. in the figure) and transmission time Information of the Trigger message of the corresponding station Group to be received (e.g., Trigger time1, Trigger time2, etc. in the figure), in the station Group to be received, Start AID1 represents an AID of a station to be received whose AID is the smallest in the first station Group corresponding to the first Trigger message (or a sequence number of "1" in a TIM corresponding to an STA whose AID is the smallest in the station Group to be received, that is, several "1" in the TIM), Num1 represents the number of stations to be received in the first station Group to be received, the number of "1" in the TIM starting from "1" corresponding to Start AID1, and the like. It should be noted that the Start AID1 may also indicate the AID of the station to be received with the largest AID in the first station group to be received (i.e., the last receiving station) corresponding to the first trigger message (or the sequence number of "1" in the TIM corresponding to the STA with the largest AID included in the STA station group to be received, i.e., the several "1" in the TIM).

402. The access point sends a first trigger message according to the sending time information of the first trigger message;

optionally, the first trigger message may include: and sending time information of the trigger message corresponding to the second station group to be received (optionally, the time precision of the sending time information included in the trigger message may be greater than the time precision of the sending time information included in the broadcast message).

After receiving the broadcast message, the station checks TIM in the broadcast message, and if the binary system corresponding to the station in the TIM is '0', the station does not need to process the TIM; and if the binary system corresponding to the station in the TIM is '1', the station is the station to be received.

Further, the station to be received determines the station group to be received corresponding to the station to be received and the sending time of the trigger message according to the corresponding station group information to be received included in the broadcast message, and prepares to send the indication message to be received.

After determining that downlink cache data need to be transmitted, a station to be received of the first station group to be received checks first station group information to be received in the broadcast message, and confirms that the station belongs to the first station group to be received through the first station group information to be received, and the corresponding trigger message is a first trigger message, and the station to be received of the first station group to be received is in an awake state at the sending time of the first trigger message.

In the embodiment of the present invention, before the access point sends the broadcast message, the sending time information of each trigger message may be set according to actual requirements; moreover, if the situation is changed (for example, a delay occurs) in the actual application process, the sending time information of the trigger message which is not sent can also be dynamically adjusted. Therefore, in the actual application process, the sending time information of the first trigger message or the sending time information of the trigger message corresponding to each to-be-received station group may be set in the broadcast message.

For example, referring to fig. 6, in fig. 6, the Trigger ID is an identifier of the Trigger message (e.g., the first Trigger message, corresponding to the to-be-received station of the first to-be-received station group); optionally, Group1 is station Group indication information to be received corresponding to the first station Group to be received, Start AID1 indicates an AID of a station to be received with the smallest AID in the first station Group to be received corresponding to the first trigger message (or a sequence number of "1" in a TIM corresponding to an STA with the smallest AID included in the station Group to be received by the STA, that is, the several "1" in the TIM), Num1 indicates the number of stations to be received included in the first station Group to be received, the number of "1" corresponding to the TIM starting from "1" corresponding to Start AID1, and so on for information in the case of multiple trigger messages. Optionally, the Next Trigger time refers to sending time information of a Next Trigger message. Optionally, the PS-Poll resource is channel resource indication information, where the channel resource indication information is indication information of a channel resource for sending an indication message to be received by a station group to be received corresponding to the trigger message, and the channel resource for sending the indication message to be received includes at least one channel resource unit for sending the indication message to be received by the station to be received. In practical applications, the channel resource for the indication message to be received may be predetermined by the access point and the station to be received, and therefore, the trigger message does not necessarily include PS-Poll resource.

403. The access point receives at least one station to be received in the first station group to be received according to the first trigger message and uses a multi-user transmission mechanism to send an indication message to be received;

For example, the station to be received of the first station group to be received may determine the channel resource for sending the indication message to be received according to the indication information of the station group to be received carried in the first trigger message. Optionally, there are the following two ways:

if the access point and the station to be received agree with channel resources (a frequency band of the whole spectrum resources and a dividing mode of the whole spectrum resources) of the indication message to be received in advance, the station to be received of the first station group to be received determines that the station belongs to the xth station of all stations to be received (indicated by Num 1) of one station group to be received according to Start AID1 and a corresponding identification bit of the station in TIM, and correspondingly, the channel resources corresponding to the station are in the xth frequency band of the whole spectrum resources;

if the access point and the station to be received do not agree on the channel resource of the indication message to be received, the station to be received of the first station group to be received learns the channel resource of the indication message to be received through the channel resource indication information in the first trigger message, and then determines that the station belongs to the xth station of all stations to be received (indicated by Num 1) of one station group to be received according to Start AID1 and the corresponding identification bit of the station in TIM, and correspondingly, the channel resource corresponding to the station is in the xth frequency band of the whole spectrum resource.

404. And the access point sends the resource allocation information to the stations to be received in the first station group to be received.

At a site side, it is assumed that at least two sites to be received in a site group to be received both support a multi-user transmission mechanism, and the site group to be received information included in the broadcast message is site group information to be received corresponding to each site group to be received, and the sending time information of the trigger message included in the broadcast message is sending time information of the trigger message corresponding to at least two site groups to be received, referring to fig. 7, another embodiment of the method for transmitting an indication message to be received in an embodiment of the present invention includes:

701. a station to be received receives a broadcast message sent by an access point;

a station to be received receives a broadcast message sent by an access point, wherein the broadcast message comprises: the method comprises the steps of transmitting an indication bitmap, information of station groups to be received corresponding to at least two station groups to be received, and sending time information of trigger messages corresponding to the at least two station groups to be received, wherein the trigger messages are used for indicating the stations to be received of the same station group to be received to send indication messages to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

For example, the message structure of the broadcast message may refer to fig. 5.

For example, after receiving the broadcast message, the station checks the TIM in the broadcast message, and if the binary system corresponding to the station in the TIM is "0", the station does not need to process the TIM; if the binary system corresponding to the station in the TIM is "1", the station is determined to be a station to be received, and step 702 is executed.

702. The station to be received confirms the station group to be received and the corresponding trigger message to which the station belongs according to the TIM and the information of each station group to be received;

and if the station group to be received where the station to be received is located is the first station group to be received, determining the station group to be received corresponding to the station to be received and the sending time of the trigger message according to the information of the first station group to be received.

If the station group to be received where the station to be received is located is not the first station group to be received, and the broadcast message further includes: and determining the station group to be received and the trigger message corresponding to the station to be received according to the station group information to be received corresponding to each station group to be received except the first station group to be received.

703. The station to be received wakes up when sending the trigger message corresponding to the station to be received and receives the trigger message corresponding to the station to be received;

if the station to be received corresponds to a first trigger message, the station to be received is in an awakening state at the sending time of the first trigger message, and receives the first trigger message sent by the access point;

and if the station to be received corresponds to the Nth trigger message, the station to be received is in an awakening state at the sending time of the Nth trigger message, and receives the Nth trigger message sent by the access point, wherein N is not a positive integer of one.

Specifically, the trigger message may be a trigger message, or may also be a message in another format, which is not limited herein. Optionally, the trigger message may include: one or more of identification information of the trigger message, indication information of a station group to be received corresponding to the trigger message, sending time information of the next trigger message and channel resource indication information; the specific conditions are determined according to actual conditions, and the method is not limited in the specific conditions. For example, the message structure of the trigger message may refer to fig. 6.

704. The station to be received sends an indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received;

705. And the station to be received receives the resource allocation information sent by the access point.

At the ap side, it is assumed that each station to be received in the station group to be received supports a multi-user transmission mechanism, and the station group to be received information included in the broadcast message is station group information to be received corresponding to each station group to be received, and the sending time information of the trigger message included in the broadcast message is only the sending time information of the first trigger message, referring to fig. 8, another embodiment of the method for transmitting an indication message to be received in the embodiment of the present invention includes:

801. the access point sends a broadcast message;

when the data of a plurality of stations to be received are cached in the access point, the access point sends a broadcast message, wherein the broadcast message comprises: the method comprises the steps of transmitting an indication bitmap, information of station groups to be received corresponding to the station groups to be received and sending time information of a first trigger message, wherein the trigger message is used for indicating the stations to be received of the same station group to be received to send the indication message to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

For example, the message structure of the broadcast message may refer to fig. 5 (in the embodiment of the present invention, Trigger time2 is not included in Trigger ie).

802. The access point sends a first trigger message according to the sending time information of the first trigger message;

specifically, the first trigger message may include: and sending time information of the trigger message corresponding to the second station group to be received.

Further, the station to be received determines the station group to be received and the trigger message corresponding to the station to be received according to the corresponding station group to be received information included in the broadcast message, and prepares to send the indication message to be received.

For example, the message structure of the trigger message may refer to fig. 6.

803. The access point receives at least one station to be received in the first station group to be received according to the first trigger message and uses a multi-user transmission mechanism to send an indication message to be received;

804. The access point sends resource allocation information to the stations to be received in the first station group to be received;

805. The access point sends a second trigger message;

it is understood that step 805 occurs after step 802, but has no strict timing relationship with

steps

803 and 804.

Illustratively, after the station to be received receives the trigger message:

1) the station to be received judges whether the currently received trigger message is the trigger message corresponding to the station to be received, if so, the process of receiving the trigger message is stopped; if not, executing the step 2);

2) and the station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the trigger message corresponding to the second station group to be received included in the currently received trigger message and executes the step 1).

806. The access point receives at least one station to be received in the second station group to be received according to the second trigger message and uses a multi-user transmission mechanism to send an indication message to be received;

807. And the access point sends the resource allocation information to the stations to be received in the second station group to be received.

In a site side, it is assumed that each site to be received in a site group to be received supports a multi-user transmission mechanism, and the site group to be received information included in the broadcast message is site group information to be received corresponding to each site group to be received, and the sending time information of the trigger message included in the broadcast message is only the sending time information of the first trigger message, referring to fig. 9, another embodiment of the method for transmitting an indication message to be received in the embodiment of the present invention includes:

901. a station to be received receives a broadcast message sent by an access point;

a station to be received receives a broadcast message sent by an access point, wherein the broadcast message comprises: the method comprises the steps of transmitting an indication bitmap, information of station groups to be received corresponding to the station groups to be received and sending time information of a first trigger message, wherein the trigger message is used for indicating the stations to be received of the same station group to be received to send the indication message to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

For example, after receiving the broadcast message, the station checks the TIM in the broadcast message, and if the binary system corresponding to the station in the TIM is "0", the station does not need to process the TIM; if the binary system corresponding to the station in the TIM is "1", the station is determined to be a station to be received, and step 902 is executed.

902. The station to be received wakes up when the first trigger message is sent according to the sending time information of the first trigger message, and receives the first trigger message;

903. The method comprises the steps that a to-be-received station judges whether a currently received trigger message is a trigger message corresponding to the to-be-received station;

the station to be received judges whether the currently received trigger message is the trigger message corresponding to the station to be received, if so, the process of receiving the trigger message is stopped, and step 905 is executed; if not, go to step 904.

In practical applications, if the broadcast message does not include the sending time of the trigger message corresponding to each station group to be received, the corresponding trigger message sent by the access point may include the sending time information of the trigger message corresponding to the second station group to be received.

904. The station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the trigger message corresponding to the second station group to be received included in the currently received trigger message;

the station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the trigger message corresponding to the second station group to be received included in the currently received trigger message, and executes step 903.

905. The station to be received sends an indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received;

906. And the station to be received receives the resource allocation information sent by the access point.

In the ap side, it is assumed that all stations to be received in the station group to be received do not all support a multi-user transmission mechanism, and the station group to be received information included in the broadcast message only includes the first station group to be received information, and the trigger message included in the broadcast message only includes the trigger message sending time information, referring to fig. 10, another embodiment of the method for transmitting an indication message to be received in the embodiment of the present invention includes:

1001. the access point sends a broadcast message;

when the data of a plurality of stations to be received are cached in the access point, the access point sends a broadcast message, wherein the broadcast message comprises: the method comprises the steps of transmitting an indication bitmap, information of a first station group to be received of a station to be received and sending time information of a first trigger message, wherein the trigger message is used for indicating the station to be received of the same station group to be received to send the indication message to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received.

For example, the message structure of the broadcast message may refer to fig. 5 (in the embodiment of the present invention, there is no second set of Trigger IEs).

In the embodiment of the present invention, Group1 includes multiple stations to be received, where part of the stations to be received support a multi-user transmission mechanism, and part of the stations to be received do not support a multi-user transmission mechanism.

1002. The access point sends a first trigger message according to the sending time information of the first trigger message;

And after the station to be received supporting the multi-user transmission mechanism receives the broadcast message sent by the access point, the station to be received wakes up when the first trigger message is sent according to the sending time information of the first trigger message.

After a station to be received, which does not support a multi-user transmission mechanism, receives a broadcast message sent by an access point, the station to be received can only recognize information of TIM in the broadcast message, and therefore, the station to be received can send an indication message to be received to the access point in a free contention channel manner in the prior art, where the general flow of the channel free contention mechanism is as follows: the station to be received firstly monitors whether the channel is idle, if the idle Time of the channel exceeds a certain Time (such as AIFS, arbitration frame interval), the station to be received starts a backoff mechanism, that is, randomly selects a backoff Time value (taking Time slot as a unit) between the set minimum backoff Time and the set maximum backoff Time, and simultaneously starts a countdown timing clock (taking Time slot as a unit), when the accumulated idle Time of the channel reaches the backoff Time value selected by the station to be received, the countdown timing clock is reduced to 0, and the station to be received is triggered to send a message to be received to the access point.

1003. The access point receives at least one station to be received in the first station group to be received according to the first trigger message and uses a multi-user transmission mechanism to send an indication message to be received;

For example, after receiving the first trigger message, the time for sending the indication message to be received is determined according to the first trigger message. Optionally, in practical application, an agreed duration may be set between the stations to be received, and after receiving the first trigger message and then the agreed duration, each station to be received simultaneously sends a reception indication message. Optionally, the first trigger message may also include sending indication information of an indication message to be received, and each station to be received determines a time for uniformly sending and receiving the indication message according to the indication of the sending indication information of the indication message to be received.

First, before sending the indication message to be received, the station to be received determines the channel resources (the frequency band of the whole spectrum resources and the dividing mode of the whole spectrum resources) of the indication message to be received, and specifically there may be two modes: 1. the access point and the station to be received are appointed in advance; 2. and the station to be received acquires the channel resource of the indication message to be received through the channel resource indication information in the first trigger message.

Secondly, the station to be received determines the channel resource of the indication message to be received sent by the station according to the channel resource of the indication message to be received and the first station group information to be received of the station to be received included in the trigger message. Specifically, if there is a scenario in which a station supporting a multi-user transmission mechanism and a station not supporting the multi-user transmission mechanism are both present, the station group indication information to be received included in the trigger message is a station type indication identifier to be received, where the station type indication identifier to be received is specifically a binary Bit table, such as STA type Bit-MAP in fig. 12. Illustratively, the station to be received learns that its own station is the station to be received supporting the multi-user transmission mechanism of the xth of the station group to be received according to the STA type Bit-MAP, and accordingly, the channel resource corresponding to its own station is in the xth frequency band of the whole spectrum resource.

1004. The access point sends resource allocation information to the stations to be received in the first station group to be received;

1005. The access point sends a second trigger message;

it is understood that step 1005 occurs after step 1002, but has no strict timing relationship with

steps

1003 and 1004.

Illustratively, after the station to be received receives the trigger message:

1006. The access point receives at least one station to be received in the second station group to be received according to the second trigger message and uses a multi-user transmission mechanism to send an indication message to be received;

1007. And the access point sends the resource allocation information to the stations to be received in the second station group to be received.

In a site side, it is assumed that all sites to be received in a site group to be received do not all support a multi-user transmission mechanism, and a site group to be received information included in a broadcast message only includes first site group to be received information, and a trigger message included in the broadcast message only includes sending time information of the first trigger message, referring to fig. 11, another embodiment of a method for transmitting an indication message to be received in an embodiment of the present invention includes:

1101. a station to be received receives a broadcast message sent by an access point;

For example, after receiving the broadcast message, the station checks the TIM in the broadcast message, and if the binary system corresponding to the station in the TIM is "0", the station does not need to process the TIM; if the binary system corresponding to the station in the TIM is '1', the station is confirmed to be a station to be received; further, if the station to be received can identify Trigger IE information in the broadcast message, step 1102 is executed; if the station to be received cannot identify Trigger IE information in the broadcast message, it is determined that the station to be received is a station to be received that does not support a multi-user transmission mechanism, and the station to be received can only identify TIM information in the broadcast message, so that the station to be received can send an indication message to be received to an access point in a free contention channel manner in the prior art, where the free contention channel mechanism has a general flow: the station to be received firstly monitors whether the channel is idle, if the idle Time of the channel exceeds a certain Time (such as AIFS, arbitration frame interval), the station to be received starts a backoff mechanism, that is, randomly selects a backoff Time value (taking Time slot as a unit) between the set minimum backoff Time and the set maximum backoff Time, and simultaneously starts a countdown timing clock (taking Time slot as a unit), when the accumulated idle Time of the channel reaches the backoff Time value selected by the station to be received, the countdown timing clock is reduced to 0, and the station to be received is triggered to send the indication message to be received to the access point.

1102. The station to be received wakes up when the first trigger message is sent according to the sending time information of the first trigger message, and receives the first trigger message;

specifically, the trigger message includes: and sending time information of the trigger message corresponding to the second station group to be received.

1103. The method comprises the steps that a to-be-received station judges whether currently-received trigger information comprises to-be-received station group indication information corresponding to the to-be-received station;

the station to be received judges whether the currently received trigger message includes the station group indication information to be received corresponding to the station to be received, if not, step 1104 is executed); if yes, the station to be received determines that the currently received trigger message is the trigger message corresponding to the station to be received, and then step 1105) is executed.

Specifically, the trigger message includes: sending time information of the trigger message corresponding to the second station group to be received and indication information of the station group to be received;

in this embodiment of the present invention, the indication information of the to-be-received station group included in the trigger message may be a station type indication bit table, where each bit in the station type indication bit table corresponds to one to-be-received station in the to-be-received station group corresponding to the trigger message, and each bit in the station type indication bit table is used to indicate whether a corresponding to-be-received station can send the to-be-received indication message.

For example, referring to fig. 12, in fig. 12, the Trigger ID is an identifier of the Trigger message (e.g., the first Trigger message, corresponding to the to-be-received station of the first to-be-received station group); optionally, the STA type Bit-MAP is a to-be-received station type indication identifier, and when a one-Bit binary number of the STA type Bit-MAP is set to "1", it indicates that a corresponding to-be-received station supports a multi-user transmission mechanism; when one of the binary digits is set to "0", it indicates that the corresponding station to be received does not support the multi-user transmission mechanism. Optionally, the Next Trigger time refers to sending time information of a Next Trigger message. Optionally, the PS-Poll resource is channel resource indication information, where the channel resource indication information is indication information of a channel resource for sending an indication message to be received by a station group to be received corresponding to the trigger message, and the channel resource for sending the indication message to be received includes at least one channel resource unit for sending the indication message to be received by the station to be received. In practical applications, the channel resource for the indication message to be received may be predetermined by the access point and the station to be received, and therefore, the trigger message does not necessarily include PS-Poll resource.

1104. The station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the trigger message corresponding to the second station group to be received included in the currently received trigger message;

the station to be received receives the trigger message corresponding to the second station group to be received according to the sending time information of the trigger message corresponding to the second station group to be received included in the currently received trigger message, and performs step 1103.

1105. The station to be received sends an indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received;

Specifically, the station to be received, in which the first station group to be received supports the multi-user transmission mechanism, may determine the channel resource for sending the indication message to be received according to the indication information of the station group to be received, which is carried in the first trigger message. Optionally, there are the following two ways:

if the access point and the station to be received agree with channel resources (frequency bands of the whole spectrum resources and division modes of the whole spectrum resources) of the indication message to be received in advance, the station to be received, which supports the multi-user transmission mechanism, of the first station group to be received knows that the station is the station to be received, which supports the multi-user transmission mechanism, of the xth station of the first station group to be received according to the STA type Bit-MAP, and correspondingly, the channel resources corresponding to the station are in the xth frequency band of the whole spectrum resources;

if the access point and the station to be received do not agree with the channel resource of the indication message to be received, the station to be received of the first station group to be received obtains the channel resource of the indication message to be received through the channel resource indication information in the first trigger message, then the station to be received of the first station group to be received supporting the multi-user transmission mechanism obtains that the station is the station to be received supporting the multi-user transmission mechanism of the xth station of the first station group to be received according to the STA type Bit-MAP, and correspondingly, the channel resource corresponding to the station is in the xth frequency band of the whole spectrum resource.

1106. And the station to be received receives the resource allocation information sent by the access point.

In the embodiment of the present invention, when all stations to be received in the station group to be received do not support the multi-user transmission mechanism, there is a scenario "the station group information to be received included in the broadcast message is the station group information to be received corresponding to each station group to be received, and the sending time information of the trigger message included in the broadcast message is the sending time information of the trigger message corresponding to each station group to be received", which may refer to the contents of the embodiments in fig. 4 and 5 (where, it is please refer to fig. 10 and 11 how to determine the channel resource of each station to be received), and a scenario "the station group information to be received included in the broadcast message is the station group information to be received corresponding to each station group to be received, and the sending time information of the trigger message included in the broadcast message is the sending time information of the first trigger message", which may refer to the contents of the embodiments in fig. 8 and 9 (where, for how to determine the channel resources of each station to be received, please refer to fig. 10 and fig. 11), which is not described herein again.

Referring to fig. 13, an access point implementing the method for transmitting an indication message to be received is described below, where another embodiment of the access point in the embodiment of the present invention includes:

a sending unit 1301, configured to send a broadcast message, where the broadcast message includes: indication bitmap (TIM) information to be transmitted, first station group information to be received and sending time information of a first trigger message; the trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the same station group to be received to send the indication message to be received to the access point at the same time; the station to be received is a station indicating downlink data in the TIM;

the sending unit 1301 is further configured to send the first trigger message according to the sending time information of the first trigger message;

a receiving unit 1302, configured to receive an indication message to be received, sent by at least one station to be received in the first station group according to the first trigger message and using a multi-user transmission mechanism.

Optionally, the broadcast message further includes:

and station group information to be received corresponding to at least one other station group to be received except the first station group to be received.

Optionally, the broadcast message further includes:

and sending time information of the trigger message corresponding to at least one other station group to be received except the first station group to be received.

Optionally, the station group information to be received includes:

Optionally, the broadcast message further includes:

Optionally, the trigger message includes:

and sending time information of the trigger message corresponding to the second station group to be received.

Optionally, the trigger message includes: station group indication information to be received;

the station group indication information to be received includes: the initial association identifier is the association identifier of the station to be received with the smallest association identifier in the stations to be received corresponding to the trigger message;

and/or the presence of a gas in the gas,

Optionally, the indication information of the station group to be received is used to indicate allocation information of channel resources of the indication message to be received corresponding to the station group to be received.

Optionally, the trigger message includes:

and the channel resource indication information is the indication information of the channel resource of the indication message to be received sent by the station group to be received corresponding to the trigger message, and the channel resource for sending the indication message to be received comprises at least one channel resource unit used for the station to be received to send the indication message to be received.

It is assumed that each station to be received in the station group to be received supports a multi-user transmission mechanism, and the station group to be received information included in the broadcast message is the station group to be received information corresponding to each station group to be received, and the sending time information of the trigger message included in the broadcast message is the sending time information of the trigger message corresponding to each station group to be received, and accordingly, the action process of each unit in the embodiment of the present invention is as follows:

when the access point caches data of a plurality of stations to be received, the sending unit 1301 sends a broadcast message, where the broadcast message includes: the method comprises the steps of transmitting an indication bitmap, information of station groups to be received corresponding to the station groups to be received, and sending time information of trigger messages corresponding to the station groups to be received, wherein the trigger messages are used for indicating the stations to be received of the same station group to be received to send indication messages to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

The sending unit 1301 sends the first trigger message by the access point according to the sending time information of the first trigger message;

the receiving unit 1302 receives at least one to-be-received station in the first to-be-received station group according to the first trigger message, and uses a to-be-received indication message sent by a multi-user transmission mechanism.

It is assumed that each station to be received in the station group to be received supports a multi-user transmission mechanism, and the station group to be received information included in the broadcast message only includes the first station group to be received information, and the trigger message sending time information included in the broadcast message only includes the first trigger message sending time information, please refer to the embodiment of fig. 2, which is not described herein again.

It is assumed that each station to be received in the station group to be received supports a multi-user transmission mechanism, the station group to be received information included in the broadcast message is station group information to be received corresponding to each station group to be received, and the sending time information of the trigger message included in the broadcast message is only the sending time information of the first trigger message, please refer to the embodiment of fig. 8, which is not described herein again.

It is assumed that all stations to be received in the station group to be received do not all support the multi-user transmission mechanism, and the station group to be received information included in the broadcast message only includes the first station group to be received information, and the trigger message sending time information included in the broadcast message only includes the first trigger message sending time information, please refer to the embodiment of fig. 10, which is not described herein again.

Referring to fig. 14, a station implementing the transmission method of the indication message to be received is described below, where an embodiment of the station in the embodiment of the present invention includes:

a message receiving unit 1401, configured to receive a broadcast message sent by an access point, where the broadcast message includes: indicating bitmap information to be transmitted, first to-be-received station group information and sending time information of a first trigger message, wherein the first to-be-received station group corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM;

the message receiving unit 1401 is further configured to wake up when the corresponding trigger message is sent according to the sending time information of the first trigger message, and receive the corresponding trigger message;

a message sending unit 1402, configured to send, according to the trigger message corresponding to the station to be received, an indication message to be received to the access point by using a multi-user transmission mechanism.

Optionally, the station further includes:

a first determining unit 1403, configured to determine, according to the TIM and the first station group to be received information, a station group to be received and a trigger message, which correspond to the station to be received.

Optionally, the broadcast message further includes: station group information to be received corresponding to at least two station groups to be received except the first station group to be received;

the station further comprises:

a second determining unit 1404, configured to determine, according to the TIM and to-be-received station group information corresponding to at least two to-be-received station groups, a to-be-received station group corresponding to the to-be-received station group and a trigger message.

Optionally, the station further includes: a first judgment unit 1405;

Optionally, the station further includes: a second judgment unit 1406;

the trigger message includes: the indication information of the station group to be received and the sending time information of the trigger message corresponding to the second station group to be received;

the second determining unit is configured to determine, when the message receiving unit wakes up when a first trigger message is sent according to the sending time information of the first trigger message and receives the first trigger message, whether the first trigger message includes indication information of a to-be-received station group corresponding to the to-be-received station, and if not, trigger the message receiving unit to receive a trigger message corresponding to a second to-be-received station group according to sending time information of a second trigger message in the first trigger message; and if so, executing the message sending unit. The message sending unit is specifically configured to send, when the first trigger message includes indication information of a to-be-received station group corresponding to the to-be-received station, an indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the to-be-received station;

Optionally, the station further includes: a first channel determining unit 1407;

the trigger message includes: the indication information of the station group to be received is used for indicating the allocation information of the channel resources of the indication information to be received corresponding to the station group to be received;

the first channel determining unit 1407 is configured to determine, according to preset channel resources and the to-be-received station group indication information, channel resources corresponding to the to-be-received indication message sent by the to-be-received station,

the message sending unit 1402 is specifically configured to send a message indicating that the access point is to receive, to the access point by using the channel resource determined by the first channel determining unit.

Optionally, the station further includes: a second channel determination unit 1408;

the trigger message includes: channel resource indication information and station group indication information to be received;

the channel resource indication information is indication information of channel resources of a station group to be received, which corresponds to the trigger message, and sends the indication message to be received, wherein the channel resources for sending the indication message to be received comprise at least one channel resource unit used for the station to be received to send the indication message to be received;

the indication information of the station group to be received is used for indicating the allocation information of the channel resources which are corresponding to the station group to be received and used for sending the indication information to be received;

the second channel determining unit 1408 determines, according to the channel resource indication information and the to-be-received station group indication information, a channel resource corresponding to the to-be-received indication message sent by the to-be-received station;

the message sending unit 1402 is specifically configured to send a message indicating that the access point is to receive, to the access point by using the channel resource determined by the second channel determining unit.

It is assumed that each station to be received in the station group to be received supports a multi-user transmission mechanism, and the station group to be received information included in the broadcast message only includes the first station group to be received information, and the trigger message sending time information included in the broadcast message only includes the first trigger message sending time information, and accordingly, the action process of each unit in the embodiment of the present invention is as follows:

the message receiving unit 1401 receives a broadcast message transmitted by an access point, the broadcast message including: the method comprises the steps of transmitting an indication bitmap, first station group information to be received and sending time information of a first trigger message, wherein the trigger message is used for indicating the stations to be received of the same station group to be received to send the indication message to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

After receiving the broadcast message, the message receiving unit 1401 wakes up when the first trigger message is sent according to the sending time information of the first trigger message, and receives the first trigger message;

specifically, the first trigger message includes: and sending time information of the trigger message corresponding to the next station group to be received.

The first determining unit 1405 determines whether the currently received trigger message includes indication information of a to-be-received station group corresponding to the to-be-received station, and if not, the message receiving unit 1401 receives the trigger message corresponding to the next to-be-received station group according to the sending time information of the trigger message corresponding to the next to-be-received station group included in the currently received trigger message; if so, the message sending unit 1402 sends the indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received.

Specifically, if the access point and the station to be received agree on channel resources, the first channel determining unit 1407 determines, according to preset channel resources and the station group to be received indication information, channel resources corresponding to the indication message to be received sent by the station to be received, and then sends the indication message to be received to the access point using the channel resources.

Optionally, if the access point and the station to be received do not agree on the channel resource, the trigger message includes channel resource indication information; the second channel determining unit 1408 determines, according to the channel resource indication information and the to-be-received station group indication information, a channel resource corresponding to the to-be-received indication message sent by the to-be-received station, and then sends the to-be-received indication message to the access point using the channel resource.

It is assumed that each station to be received in the station group to be received supports a multi-user transmission mechanism, the station group to be received information included in the broadcast message is station group information to be received corresponding to each station group to be received, and the sending time information of the trigger message included in the broadcast message is only the sending time information of the first trigger message, please refer to the embodiment of fig. 9, which is not described herein again.

It is assumed that all stations to be received in the station group to be received do not all support the multi-user transmission mechanism, and the station group to be received information included in the broadcast message only includes the first station group to be received information, and the trigger message sending time information included in the broadcast message only includes the first trigger message sending time information, please refer to fig. 11 for the embodiment, which is not described herein again.

Referring to fig. 14, a station implementing the method for transmitting an indication message to be received is described below, where another embodiment of the station in the embodiment of the present invention includes:

a message receiving unit 1401, configured to receive a broadcast message sent by an access point, where the broadcast message includes: the method comprises the steps of waiting to transmit indication bitmap (TIM) information, at least two station group information to be received and sending time information of trigger messages corresponding to the at least two station groups to be received; the trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the same station group to be received to send the indication message to be received to the access point at the same time; the station to be received is a station indicating downlink data in the TIM;

the message receiving unit 1401 is further configured to wake up when the trigger message corresponding to the station to be received is sent according to the sending time information of the trigger message corresponding to the at least two station groups to be received, and receive the trigger message corresponding to the station to be received;

the first channel determining unit is configured to determine, according to preset channel resources and the to-be-received station group indication information, channel resources corresponding to the to-be-received indication message sent by the to-be-received station,

the second channel determining unit determines, according to the channel resource indication information and the to-be-received station group indication information, channel resources corresponding to the to-be-received indication message sent by the to-be-received station

The message sending unit is specifically configured to: and sending a message indicating to be received to the access point by using the channel resource determined by the second channel determination unit.

the message receiving unit 1401 receives a broadcast message transmitted by an access point, the broadcast message including: the method comprises the steps of transmitting an indication bitmap, information of station groups to be received corresponding to the station groups to be received, and sending time information of trigger messages corresponding to the station groups to be received, wherein the trigger messages are used for indicating the stations to be received of the same station group to be received to send indication messages to be received to the access point at the same time, and the first trigger message is the trigger message corresponding to the first station group to be received. The station to be received is a station indicating downlink data in the TIM.

After receiving the broadcast message, the message receiving unit 1401 determines, according to the TIM and the information of each station group to be received, a station group to be received to which the station belongs and a corresponding trigger message;

if the station to be received corresponds to the first trigger message, the station to be received is in an awakening state at the sending time of the first trigger message, and receives the first trigger message sent by the access point;

and if the station to be received corresponds to the Nth trigger message, the station to be received is in an awakening state at the sending time of the Nth trigger message, and the Nth trigger message sent by the access point is received, wherein N is not a positive integer of one.

The message sending unit 1402 sends the indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received.

Fig. 15 is a schematic structural diagram of an access point or a station according to an embodiment of the present invention. An access point or station may include a transmitter 1510, a receiver 1520, a processor 1530, memory 1540, and a bus system 1550.

The transmitter 1510 and the receiver 1520 are used to establish a communication channel through which an access point or station connects to a remote server and downloads and uploads media data from and to the remote server. The transmitter 1510 and the receiver 1520 may include a Wireless Local area network (wlan) module, a bluetooth module, a baseband (Base Band) module, and other communication modules, and Radio Frequency (RF) circuits corresponding to the communication modules, for performing wlan communication, bluetooth communication, infrared communication, and/or cellular communication system communication, such as Wideband Code division multiple Access (W-CDMA) and/or High Speed Downlink Packet Access (HSDPA). The communication module is used for controlling communication of each component in the Access point and can support Direct Memory Access (Direct Memory Access).

In various embodiments of the present invention, the various communication modules in the transmitter 1510 and the receiver 1520 are typically in the form of Integrated Circuit chips (Integrated Circuit chips) and may be selectively combined without including all communication modules and corresponding antenna groups. For example, the transmitter 1510 and the receiver 1520 may include only a baseband chip, a radio frequency chip, and a corresponding antenna to provide a communication function in one cellular communication system. Via a wireless communication connection established by the transceiver 1560, such as a wireless local area Network access or WCDMA access, the access point or station may be connected to a Cellular Network or the Internet (Internet). In some alternative embodiments of the invention, the communication modules in the transmitter 1510 and receiver 1520, such as baseband modules, may be integrated into the processor 1530.

Memory 1540 can include both read-only memory and random-access memory and provides instructions and data to processor 1530. A portion of memory 1540 may also include non-volatile random access memory (NVRAM).

Memory 1540 stores elements, executable modules, or data structures, or subsets thereof, or expanded sets thereof:

and (3) operating instructions: including various operational instructions for performing various operations.

Operating the system: including various system programs for implementing various basic services and for handling hardware-based tasks.

Processor 1530 controls the operation of the access point or station, and processor 1530 may also be referred to as a Central Processing Unit (CPU). Memory 1540 can include both read-only memory and random-access memory and provides instructions and data to processor 1530. A portion of memory 1540 may also include non-volatile random access memory (NVRAM). In a particular application, the various components of an access point or station are coupled together by a bus system 1550, where the bus system 1550 can include, in addition to a data bus, a power bus, a control bus, a status signal bus, and the like. For clarity of illustration, however, the various buses are designated in the figure as bus system 1550.

The methods disclosed in the embodiments of the present invention described above can be applied to the processor 1530 or implemented by the processor 1530. Processor 1530 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method can be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1530. The processor 1530 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1540, and the processor 1530 reads the information in the memory 1540, and performs the steps of the above method in combination with the hardware thereof.

In an embodiment of the access point, processor 1530, by calling the operating instructions stored in memory 1540 (which may be stored in the operating system), performs the following:

the processor 1530 is configured to send a broadcast message via the transmitter 1510, the broadcast message comprising: indicating bitmap information to be transmitted, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM; sending the first trigger message according to the sending time information of the first trigger message;

the processor 1530 is further configured to receive, through the receiver 1520, an indication message to be received, sent by at least one station to be received in the first station group to be received according to the first trigger message and by using a multi-user transmission mechanism.

Optionally, the broadcast message further includes:

Optionally, the station group information to be received includes:

Optionally, the broadcast message further includes:

Optionally, the trigger message includes:

and sending time information of the trigger message corresponding to the next station group to be received.

and/or the presence of a gas in the gas,

Optionally, the trigger message includes:

Please refer to the above method embodiment for the operation flow of each module in the access point, which is not described herein again.

In one embodiment of a station, processor 1530, by calling operational instructions stored in memory 1540 (which may be stored in an operating system), performs the following:

the processor 1530 is configured to receive, through the receiver 1520, a broadcast message transmitted by an access point, the broadcast message including: indication bitmap (TIM) information to be transmitted, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM; awakening when the corresponding trigger message is sent according to the sending time information of the first trigger message, and receiving the corresponding trigger message;

the processor 1530 is configured to send, by the transmitter 1510 according to the trigger message corresponding to the station to be received, a to-be-received indication message to the access point by using a multi-user transmission mechanism.

Optionally, the processor 1530 is further configured to determine a station group to be received and a trigger message corresponding to the station to be received according to the TIM and the first station group to be received information.

Optionally, the broadcast message further includes: station group information to be received corresponding to each station group to be received except the first station group to be received;

the station further comprises:

the processor 1530 is further configured to determine a station group to be received and a trigger message, which correspond to the station to be received, according to the TIM and station group to be received information corresponding to each station group to be received.

Optionally, the trigger message includes: sending time information of a trigger message corresponding to the next station group to be received;

1) the receiver 1520 wakes up when the first trigger message is transmitted according to the transmission time information of the first trigger message, and receives the first trigger message;

2) the processor 1530 determines whether the currently received trigger message is the trigger message corresponding to the station to be received, and if so, stops receiving the trigger message; if not, executing the step 3);

3) the receiver 1520 receives the trigger message corresponding to the next site group to be received according to the sending time information of the trigger message corresponding to the next site group to be received included in the currently received trigger message, and performs step 2).

Optionally, the trigger message includes: the indication information of the station group to be received and the sending time information of the trigger message corresponding to the next station group to be received;

2) the processor 1530 determines whether the currently received trigger message includes the to-be-received station group indication information corresponding to the to-be-received station, and if not, performs step 3); if yes, executing step 4);

3) the receiver 1520 receives the trigger message corresponding to the next site group to be received according to the sending time information of the trigger message corresponding to the next site group to be received included in the currently received trigger message, and performs step 2);

4) the receiver 1520 determines that the currently received trigger message is the trigger message corresponding to the station to be received, and stops the process of receiving the trigger message.

Optionally, the trigger message includes: the indication information of the station group to be received is used for indicating the allocation information of the channel resources of the indication information to be received corresponding to the station group to be received;

the processor 1530 is further configured to determine, according to preset channel resources and the to-be-received station group indication information, channel resources corresponding to the to-be-received indication message sent by the to-be-received station,

the transmitter 1510 is specifically configured to send a message to be received to the access point using the channel resource determined by the first channel determining unit.

Optionally, the trigger message includes: channel resource indication information and station group indication information to be received;

the processor 1530 further determines, according to the channel resource indication information and the to-be-received station group indication information, that the to-be-received station sends the channel resource corresponding to the to-be-received indication message;

the transmitter 1510 is specifically configured to send a message indicating to be received to the access point using the channel resource determined by the second channel determining unit.

Please refer to the above method embodiment for the operation flow of each module in the site, which is not described herein again.

In another embodiment of the station, processor 1530, by calling the operating instructions stored in memory 1540 (which may be stored in an operating system), performs the following:

the processor 1530 is configured to receive, through the receiver 1520, a broadcast message transmitted by an access point, the broadcast message including: the method comprises the steps of waiting to transmit indication bitmap (TIM) information, at least two station group information to be received and sending time information of trigger messages corresponding to the at least two station groups to be received; the first trigger message is used for indicating the station to be received supporting the multi-user transmission mechanism in the first station group to be received to simultaneously send an indication message to be received to the access point; the station to be received is a station indicating downlink data in the TIM; awakening when the corresponding trigger message is sent according to the sending time information of the trigger messages corresponding to the at least two station groups to be received, and receiving the corresponding trigger message;

In the several embodiments provided in the present application, it should be understood that the disclosed 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 integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit 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 claims.

Claims

1. A transmission method of an indication message to be received is characterized by comprising the following steps:

an access point transmits a broadcast message, the broadcast message comprising: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used to instruct at least two to-be-received stations supporting a multi-user transmission mechanism in the first to-be-received station group to simultaneously send to-be-received instruction messages to the access point, where the to-be-received stations are stations indicating downlink data in the TIM, a wireless channel spectrum working between the access point and the to-be-received stations is divided into a plurality of sub-channels, and any one to-be-received station uses one of the plurality of sub-channels in the wireless channel spectrum to send the to-be-received instruction message; the access point sends the first trigger message according to the sending time information of the first trigger message;

and the access point simultaneously receives the indication message to be received, which is sent by at least one station to be received in the first station group to be received according to the first trigger message and by using a multi-user transmission mechanism, so that the waste of channel resources caused by message collision in the free competition process of the channel is avoided.

2. The method of claim 1, wherein the to-be-received station group information comprises:

3. The method of claim 1, wherein the broadcasting the message further comprises:

4. The method of claim 1, wherein the first trigger message comprises:

5. The method of claim 1,

and/or the presence of a gas in the gas,

6. The method of claim 5, wherein the first to-be-received station group indication information comprises: and indicating the allocation information of the channel resources of the indication message to be received corresponding to the first site group to be received.

7. The method according to any one of claims 1 to 6, wherein the first trigger message comprises:

8. A transmission method of an indication message to be received is characterized by comprising the following steps:

a station to be received receives a broadcast message sent by an access point, wherein the broadcast message comprises: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating at least two stations to be received supporting a multi-user transmission mechanism in the first station group to be received to simultaneously send indication messages to be received to the access point; the station to be received is a station indicating downlink data in the TIM, a wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of sub-channels, and any station to be received uses one of the sub-channels in the wireless channel frequency spectrum to send the indication message to be received;

and the station to be received sends the indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received, so that the waste of channel resources caused by message collision in the free competition process of the channel is avoided.

9. The method according to claim 8, wherein before receiving the trigger message corresponding to the station to be received, the method comprises:

10. The method of claim 8,

11. The method of claim 8,

12. The method of claim 8,

13. The method of claim 8,

14. A transmission method of an indication message to be received is characterized by comprising the following steps:

a station to be received receives a broadcast message sent by an access point, wherein the broadcast message comprises: the method comprises the steps of sending indication bitmap TIM information to be transmitted, at least two station group information to be received and sending time information of trigger messages corresponding to the at least two station groups to be received, wherein a first station group to be received corresponds to a first trigger message; the first trigger message is used for indicating at least two stations to be received supporting a multi-user transmission mechanism in the first station group to be received to simultaneously send indication messages to be received to the access point; the station to be received is a station indicating downlink data in the TIM, a wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of sub-channels, and any station to be received uses one of the sub-channels in the wireless channel frequency spectrum to send the indication message to be received;

15. The method of claim 14,

16. The method of claim 14,

17. An access point, comprising:

a transmitting unit configured to transmit a broadcast message, the broadcast message including: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating at least two stations to be received supporting a multi-user transmission mechanism in the first station group to be received to simultaneously send indication messages to be received to the access point; the station to be received is a station indicating downlink data in the TIM, a wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of sub-channels, and any station to be received uses one of the sub-channels in the wireless channel frequency spectrum to send the indication message to be received;

and the receiving unit is used for simultaneously receiving the indication message to be received, which is sent by at least one station to be received in the first station group according to the first trigger message and by using a multi-user transmission mechanism, so that the waste of channel resources caused by message collision in the free competition process of the channel is avoided.

18. The access point of claim 17, wherein the station group information to be received comprises:

19. The access point of claim 17, wherein the broadcast message further comprises:

20. The access point of claim 17, wherein the first trigger message comprises:

21. The access point of claim 17,

and/or the presence of a gas in the gas,

22. The access point of claim 21, wherein the first indication information of the station group to be received further includes allocation information indicating channel resources of the indication message to be received corresponding to the first station group to be received.

23. An access point as claimed in any one of claims 17 to 22, wherein the first trigger message comprises:

24. A station, comprising:

a message receiving unit, configured to receive a broadcast message sent by an access point, where the broadcast message includes: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating at least two stations to be received supporting a multi-user transmission mechanism in the first station group to be received to simultaneously send indication messages to be received to the access point; the station to be received is a station indicating downlink data in the TIM, a wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of sub-channels, and any station to be received uses one of the sub-channels in the wireless channel frequency spectrum to send the indication message to be received;

and the message sending unit is used for sending the indication message to be received to the access point by using a multi-user transmission mechanism according to the trigger message corresponding to the station to be received, so that the waste of channel resources caused by message collision in the free competition process of the channel is avoided.

25. The station of claim 24, further comprising:

26. The station of claim 24,

the station further comprises:

the station further comprises: a first judgment unit;

27. The station of claim 24,

the station further comprises: a second judgment unit;

28. The station of claim 24,

the station further comprises: a first channel determination unit;

29. The station of claim 24,

the station further comprises: a second channel determination unit;

30. A station, comprising:

a message receiving unit, configured to receive a broadcast message sent by an access point, where the broadcast message includes: the method comprises the steps that indication bitmap TIM information to be transmitted is composed of at least two pieces of information of station groups to be received and sending time information of trigger messages corresponding to the at least two station groups to be received, wherein a first station group to be received corresponds to a first trigger message; the first trigger message is used for indicating at least two stations to be received supporting a multi-user transmission mechanism in the first station group to be received to simultaneously send indication messages to be received to the access point; the station to be received is a station indicating downlink data in the TIM, a wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of sub-channels, and any station to be received uses one of the sub-channels in the wireless channel frequency spectrum to send the indication message to be received;

31. The station of claim 30,

the station further comprises: a first channel determination unit;

32. The station of claim 30,

the station further comprises: a second channel determination unit;

33. An access point, comprising:

a transmitter, a receiver and a processor;

the processor is configured to send a broadcast message via the transmitter, the broadcast message comprising: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating at least two stations to be received supporting a multi-user transmission mechanism in the first station group to be received to simultaneously send indication messages to be received to the access point; the station to be received is a station indicating downlink data in the TIM, a wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of sub-channels, and any station to be received uses one of the sub-channels in the wireless channel frequency spectrum to send the indication message to be received; sending the first trigger message according to the sending time information of the first trigger message;

the processor is further configured to receive, by the receiver, an indication message to be received sent by at least one station to be received in the first station group according to the first trigger message and by using a multi-user transmission mechanism, thereby avoiding waste of channel resources due to message collision in a free contention process of a channel.

34. A station, comprising: a transmitter, a receiver and a processor;

the processor is configured to receive, by the receiver, a broadcast message sent by an access point, the broadcast message including: the method comprises the steps of waiting to transmit indication bitmap TIM information, first station group information to be received and sending time information of a first trigger message, wherein the first station group to be received corresponds to the first trigger message; the first trigger message is used for indicating at least two stations to be received supporting a multi-user transmission mechanism in the first station group to be received to simultaneously send indication messages to be received to the access point; the station to be received is a station indicating downlink data in the TIM, a wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of sub-channels, and any station to be received uses one of the sub-channels in the wireless channel frequency spectrum to send the indication message to be received; awakening when the corresponding trigger message is sent according to the sending time information of the first trigger message, and receiving the corresponding trigger message;

the processor is configured to send, by the transmitter, a to-be-received indication message to the access point according to the trigger message corresponding to the to-be-received station and using a multi-user transmission mechanism, thereby avoiding waste of channel resources due to message collision in a free channel contention process.

35. A station, comprising: a transmitter, a receiver and a processor;

the processor is configured to receive, by the receiver, a broadcast message sent by an access point, the broadcast message including: the method comprises the steps of sending indication bitmap TIM information to be transmitted, at least two station group information to be received and sending time information of trigger messages corresponding to the at least two station groups to be received, wherein a first station group to be received corresponds to a first trigger message; the first trigger message is used for indicating at least two stations to be received supporting a multi-user transmission mechanism in the first station group to be received to simultaneously send indication messages to be received to the access point; the station to be received is a station indicating downlink data in the TIM, a wireless channel frequency spectrum working between the access point and the station to be received is divided into a plurality of sub-channels, and any station to be received uses one of the sub-channels in the wireless channel frequency spectrum to send the indication message to be received; awakening when the corresponding trigger message is sent according to the sending time information of the corresponding trigger message, and receiving the corresponding trigger message;