JP7105740B2 - Methods, access points and stations for transmitting channel state information - Google Patents

Description

The present invention relates to the field of communications, and more particularly to methods, access points and stations for transmitting channel state information.

Multiuser Multiple Input Multiple Output (MU-MIMO, Multiuser Multiple Input Multiple Output) technology is currently known. In MU-MIMO, multi-user transmission is implemented by using multiple parallel channels in the spatial dimension. However, this form requires the transmitting or receiving end to have all or part of the channel state information. Otherwise, the receiving end cannot correctly demodulate multiple valid signals, causing transmission failure.

With the development of wireless local area network (WLAN) technology, it is expected that MU-MIMO technology can be applied to WLAN. In order to schedule multiple users simultaneously for channel state information feedback, when a Station (STA) has limited ability, an Access Point (AP) uses Null Data Packet Announcement (NDPA). Packet Announcement), Null Data Packet (NDP), and Beamforming Report Poll (BF Report Poll) frames, so that STAs can send information carried within NDPA and within NDP It performs channel estimation according to a highly efficient long training filed (HE-LTF) carried in , and feeds back channel state information to the AP within a certain time period.

However, more STAs are introduced in the 802.11ax standard, and some STAs cannot perform feedback immediately. For example, the STA cannot immediately perform feedback due to limited capacity, or the AP allocates insufficient resources. In the above case, the STA cannot feed back the channel state information immediately, and resources may be wasted as the AP waits for a long time to receive the channel state information, resulting in channel state information transmission. efficiency is reduced.

Embodiments of the present invention provide a method, access point and station for transmitting channel state information to improve channel state information transmission efficiency.

According to a first aspect, there is provided a method of transmitting channel state information, the method comprising, by a station STA, a feedback indication message sent by an access point AP, a high efficiency length training sequence, and a first resource scheduling receiving a message, wherein the feedback indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP, and the high efficiency length training sequence is the STA's first Used to determine channel state information, the first resource scheduling message is used by the STA when the STA performs feedback in response to the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. and the STA, when parsing the feedback indication message and determining that the STA belongs to the target STA, by the STA to the first communication resource; sending an acknowledgment message to the AP by using and sending.

According to a second aspect, there is provided a method of transmitting channel state information, the method comprising sending a feedback indication message, a high efficiency length training sequence and a first resource scheduling message, the feedback indication message is used to indicate at least two target STAs that need to feed back channel state information, the high efficiency length training sequence is used to determine the first channel state information of the target STA, and the first is used to indicate the first communication resource to be used by the target STA when the target STA performs feedback according to the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. and receiving an acknowledgment message sent by the target STA by using a first communication resource, the acknowledgment message being sent by the target STA as a feedback indication message, a high efficiency a long training sequence, and a receiving step used to indicate that the first resource scheduling message has been received.

According to a third aspect, there is provided a method of transmitting channel state information, the method comprising, by station STA, according to first indication information, a first resource scheduling message sent by access point AP, a first and a first high efficiency length training sequence, wherein the first feedback indication message indicates at least two target stations STA that need to feed back channel state information to the AP. wherein the first resource scheduling message or the first feedback indication message includes first indication information, the first indication information instructing the STA whether to immediately feedback the channel state information , the first high-efficiency length training sequence is used to determine the STA's first channel state information, and the first resource scheduling message is used for the STA to receive second channel state information or an acknowledgment used to indicate the first communication resource used by the STA when feeding back the message, the second channel state information being part or all of the first channel state information, and the acknowledgment message: receiving used to indicate that the first feedback indication message, the first high efficiency length training sequence, and the first resource scheduling message have been received; and parsing the first feedback indication message. and performing channel estimation according to a first high-efficiency-length training sequence to determine first channel state information when determining that the STA belongs to the target STA; 2 channel state information or acknowledgment message to the AP.

According to a fourth aspect, there is provided a method of transmitting channel state information, the method comprising determining first indication information, the first indication information immediately feeding back the channel state information; determining whether the at least two target stations STA should feed back channel state information to the access point AP; sending a first resource scheduling message, a first feedback indication message, and a first high efficiency length training sequence according to a first including indication information, the first feedback indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP, and the first high efficiency length training sequence is the target STA's The first resource scheduling message is used to determine the first channel state information, and the first resource scheduling message is the first communication resource used by the target STA when the target STA feeds back the second channel state information or the acknowledgment message , the second channel state information is part or all of the first channel state information, and the acknowledgment message is the first feedback indication message, the first high efficiency length training sequence , and a first resource scheduling message, a first feedback indication message, by using the sending step and the first communication resource used to indicate that the first resource scheduling message has been received; and receiving a second channel state information or acknowledgment message sent by the target STA according to the first high efficiency length training sequence.

According to a fifth aspect, there is provided a method of transmitting channel state information, the method including, by a station STA, a feedback indication message sent by an access point AP, a high efficiency length training sequence, and a first resource scheduling receiving a message, wherein the feedback indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP, and the high efficiency length training sequence is the target STA's first and the first resource scheduling message is used to indicate the first communication resource to be used by the target STA when the target STA feeds back the second channel state information. and the second channel state information is part of the first channel state information, the first channel state when parsing the feedback indication message and determining that the STA belongs to the target STA. performing channel estimation according to a high efficiency length training sequence to obtain the information and sending second channel state information to the AP by using a first communication resource; and a first polling scheduling sent by the AP. receiving the message and a second resource scheduling message, the first polling scheduling message being used by the AP to request third channel state information from the STA, the first polling scheduling message: including segment information of the third channel state information within the first channel state information, the third channel state information being part or all of the first channel state information from which the second channel state information is removed and the second resource scheduling message is used to indicate a second communication resource to be used by the STA when the STA feeds back the third channel state information; and sending the third channel state information to the AP by using the communication resource.

According to a sixth aspect, there is provided a method of transmitting channel state information, the method comprising sending a feedback indication message, a high efficiency length training sequence and a first resource scheduling message, the feedback indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP, the high efficiency length training sequence is used to determine the first channel state information of the target STA; The first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back the second channel state information, the second channel state information is the first receiving second channel state information sent by the target STA by using a first communication resource; a first polling scheduling message; sending a second resource scheduling message, wherein the first polling scheduling message is used to request third channel state information from the target STA; including segment information of third channel state information within the state information, the third channel state information being part or all of the first channel state information from which the second channel state information is removed; 2 resource scheduling message is used to indicate the second communication resource to be used by the target STA when the target STA feeds back the third channel state information; and receiving third channel state information sent by the target STA by using.

According to a seventh aspect, there is provided a station for transmitting channel state information, the station receiving a feedback indication message, a high efficiency length training sequence and a first resource scheduling message sent by an access point AP. wherein the feedback indication message is used to indicate at least two target stations STA that need to feed back channel state information to the AP, and the high efficiency length training sequence is , is used to determine the first channel state information of the STA, and the first resource scheduling message is for the STA to provide feedback in response to the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. A first receiving unit used to indicate a first communication resource to be used by the STA when executing and a feedback indication message received by the receiving unit are analyzed to determine that the STA belongs to the target STA. a first sending unit configured to send an acknowledgment message to the AP by using a first communication resource, the acknowledgment message comprising: a feedback indication message; a high efficiency length training sequence; and a first sending unit used to indicate that the first resource scheduling message has been received.

According to an eighth aspect, there is provided an access point for transmitting channel state information, the station configured to send a feedback indication message, a high efficiency length training sequence and a first resource scheduling message to station STA. a first sending unit, wherein the feedback indication message is used to indicate at least two target STAs that need to feed back channel state information, and the high efficiency length training sequence is sent to the first of the target STAs. Used to determine channel state information, the first resource scheduling message is used by the target STA when the target STA performs feedback according to the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. using the first communication resource indicated by a first sending unit and a first resource scheduling message sent by the first sending unit; a first receiving unit configured to receive an acknowledgment message sent by the target STA, the acknowledgment message being the target STA receiving the feedback indication message, the high efficiency length training sequence, and the first a first receiving unit used to indicate that one resource scheduling message has been received.

According to a ninth aspect, there is provided a station for transmitting channel state information, the station according to first indication information a first resource scheduling message sent by the access point AP, a first feedback indication message , and a first receiving unit configured to receive the first high efficiency length training sequence, wherein the first feedback indication message is for at least two targets that need to feed back channel state information to the AP. Used to indicate the station STA, the first resource scheduling message or the first feedback indication message includes first indication information, the first indication information whether to immediately feedback the channel state information , the first high efficiency length training sequence is used to determine the STA's first channel state information, and the first resource scheduling message is used to instruct the STA to use the second channel used to indicate a first communication resource to be used by the STA when feeding back state information or an acknowledgment message, the second channel state information being part or all of the first channel state information; the acknowledgment message is used to indicate that the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message have been received; received by the first receiving unit to determine first channel state information when the first feedback indication message received by the one receiving unit is analyzed and the STA is determined to belong to the target STA; second channel conditions by performing channel estimation according to the first high efficiency length training sequence and using the first communication resource indicated by the first resource scheduling message received by the first receiving unit; and a first sending unit configured to send an information or acknowledgment message to the AP.

According to a tenth aspect, there is provided an access point for transmitting channel state information, the access point being a determining unit configured to determine first indication information, the first indication information being , used to instruct the at least two target stations STA whether to immediately feed back the channel state information, the at least two target stations STA need to feed back the channel state information to the access point AP, the determining unit and a first configured to send a first resource scheduling message, a first feedback indication message and a first high efficiency length training sequence to the target STA according to the first indication information determined by the determining unit. wherein the first resource scheduling message or the first feedback indication message includes first indication information, and the first feedback indication message is at least required to feed back channel state information to the AP The first high-efficiency length training sequence is used to determine the first channel state information of the target STA, and the first resource scheduling message is used to direct the two target station STAs. is used to indicate the first communication resource used by the target STA when feeding back the second channel state information or the acknowledgment message, the second channel state information being one of the first channel state information a first feedback indication message, a first high efficiency length training sequence, and a first resource scheduling message are received; target according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence sent by the first sending unit by using the sending unit and the first communication resource of and a first receiving unit configured to receive second channel state information or an acknowledgment message sent by the STA.

According to an eleventh aspect, there is provided a station for transmitting channel state information, the station receiving a feedback indication message, a high efficiency length training sequence and a first resource scheduling message sent by an access point AP. wherein the feedback indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP, and the high efficiency length training sequence comprises: The first resource scheduling message is used to determine the STA's first channel state information, and the first resource scheduling message indicates the first communication resource to be used by the STA when the STA feeds back the second channel state information. and the second channel state information is part of the first channel state information, the first receiving unit and the feedback indication message received by the first receiving unit are analyzed and the STA is targeted performing channel estimation according to the high efficiency length training sequence received by the first receiving unit to obtain first channel state information when determined to belong to the STA; a first sending unit configured to send second channel state information to the AP by using a first communication resource indicated by the first resource scheduling message sent by the AP; a second receiving unit configured to receive a polling scheduling message and a second resource scheduling message, wherein the first polling scheduling message is sent by the AP to request third channel state information from the STA; used, the first polling scheduling message includes segment information of the third channel state information within the first channel state information, the third channel state information having the second channel state information removed therefrom Part or all of the first channel state information, and the second resource scheduling message is used to indicate a second communication resource to be used by the STA when the STA feeds back the third channel state information. and a second resource scheduling message received by the second receiving unit. a second sending unit configured to send third channel state information to the AP by using a second communication resource indicated by the message.

According to a twelfth aspect, there is provided an access point for transmitting channel state information, the access point configured to send a feedback indication message, a high efficiency length training sequence, and a first resource scheduling message. 1 sending unit, the feedback indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP, and the high efficiency length training sequence is the first of the target STAs. Used to determine channel state information, the first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back the second channel state information. , the second channel state information is part of the first channel state information, a first sending unit indicated by a first resource scheduling message sent by the first sending unit; a first receiving unit configured to receive second channel state information sent by the target STA by using a communication resource and sending a first polling scheduling message and a second resource scheduling message; wherein the first polling scheduling message is used to request third channel state information from the target STA, the first polling scheduling message is configured to request third channel state information from the first including segment information of third channel state information within the channel state information, the third channel state information being part or all of the first channel state information from which the second channel state information is removed; a second resource scheduling message, a second sending unit used to indicate a second communication resource to be used by the target STA when the target STA feeds back the third channel state information; a second communication resource configured to receive third channel state information sent by the target STA by using a second communication resource indicated by a second resource scheduling message sent by the sending unit of the second receiving unit of

In an embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: Feed back the acknowledgment message to the access point. In this manner, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

To describe the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings required to describe the embodiments of the present invention. Apparently, the accompanying drawings in the following description merely show some embodiments of the invention, and those skilled in the art may still derive other drawings from these accompanying drawings without creative effort.

1 is a schematic diagram illustrating a communication system scenario in which embodiments of the present invention may be applied; FIG. Fig. 4 is a schematic flow diagram illustrating a method for transmitting channel state information according to an embodiment of the invention; Figure 4 is a schematic flow diagram illustrating a method for transmitting channel state information according to another embodiment of the present invention; Figure 4 is a schematic flow diagram illustrating a method for transmitting channel state information according to yet another embodiment of the present invention; Figure 4 is a schematic flow diagram illustrating a method for transmitting channel state information according to yet another embodiment of the present invention; Figure 4 is a schematic flow diagram illustrating a method of transmitting channel state information according to yet another embodiment of the present invention; Figure 4 is a schematic flow diagram illustrating a method for transmitting channel state information according to yet another embodiment of the present invention; FIG. 4 is an interaction diagram of an access point scheduling multiple stations to transmit channel state information according to an embodiment of the present invention; FIG. 4 is an interaction diagram of an access point scheduling multiple stations to transmit channel state information according to an embodiment of the present invention; FIG. 4 is an interaction diagram of an access point scheduling multiple stations to transmit channel state information according to another embodiment of the present invention; FIG. 4 is an interaction diagram of an access point scheduling multiple stations to transmit channel state information according to another embodiment of the present invention; FIG. 4 is an interaction diagram for an access point to schedule multiple stations to transmit channel state information according to yet another embodiment of the present invention; FIG. 4 is an interaction diagram for an access point to schedule multiple stations to transmit channel state information according to yet another embodiment of the present invention; FIG. 4 is an interaction diagram for an access point to schedule multiple stations to transmit channel state information according to yet another embodiment of the present invention; FIG. 4 is an interaction diagram for an access point to schedule multiple stations to transmit channel state information according to yet another embodiment of the present invention; FIG. 4 is an interaction diagram for an access point to schedule multiple stations to transmit channel state information according to yet another embodiment of the present invention; FIG. 4 is a structural diagram showing a frame designed based on the trigger frame, combining the beamforming report pole frame and the trigger frame according to an embodiment of the present invention; FIG. 4 is a structural diagram showing a frame designed based on a beamforming report pole frame, combining a beamforming report pole frame and a trigger frame according to another embodiment of the present invention; Figure 4 is a schematic diagram illustrating a station transmitting channel state information according to an embodiment of the present invention; Figure 4 is a schematic diagram illustrating an access point transmitting channel state information according to another embodiment of the present invention; Figure 4 is a schematic diagram illustrating a station transmitting channel state information according to yet another embodiment of the present invention; Figure 4 is a schematic diagram illustrating an access point transmitting channel state information according to yet another embodiment of the present invention; Figure 4 is a schematic diagram illustrating a station transmitting channel state information according to yet another embodiment of the present invention; Figure 4 is a schematic diagram illustrating an access point transmitting channel state information according to yet another embodiment of the present invention; 1 is a schematic diagram showing an apparatus for transmitting channel state information according to an embodiment of the present invention; FIG.

The following clearly describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are a part rather than all of the embodiments of the present invention. All other embodiments obtained by persons skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

The technical solution of the present invention applies to various communication systems in which channel state information needs to be fed back to perform data transmission where MU-MIMO technology, such as Wireless Fidelity (Wi-Fi), is applied. , for example in wireless local area networks (WLAN, Wireless Local Area Network).

Within a WLAN, a station (STA, Station) may be a system, subscriber unit, access terminal, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, user equipment, or UE. (User Equipment). STAs are used in cellular telephones, cordless telephones, Session Initiation Protocol (SIP) telephones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), wireless local area networks (e.g. , Wi-Fi) communication capability, a computing device, or another processing device connected to a wireless modem.

Further, within a WLAN, an access point (AP) communicates with an access terminal by using a wireless local area network to transmit data of the access terminal to the network side or transmit data from the network side to the access terminal. can be used to send

For ease of understanding and explanation, by way of example and not limitation, the following describes the processes and actions and apparatus for performing the method of transmitting channel state information within a Wi-Fi system of the present invention.

FIG. 1A is a schematic diagram of a communication system scenario in which embodiments of the present invention may be applied.

The communication system of FIG. 1A includes one AP and three STAs (eg, STA 1, STA 2, and STA 3 in FIG. 1A). The AP may communicate with STA 1, STA 2, and STA 3. In this system, an AP may schedule multiple STAs to feed back and transmit channel state information. Note that there can be more than one STA.

Method embodiment 1
FIG. 1B is a schematic flow diagram of a method for transmitting channel state information according to an embodiment of the invention. The method of FIG. 1B may be performed by a station.

101. A station STA receives a feedback indication message sent by an access point AP, a high efficiency length training sequence, and a first resource scheduling message, the feedback indication message indicating at least two channels to feed back channel state information to the AP. The high-efficiency length training sequence is used to determine the first channel state information of the target STA, the first resource scheduling message is the target STA feedback indication message, Used to indicate the first communication resource to be used by the target STA when performing feedback according to the high efficiency length training sequence and the first resource scheduling message.

102. When the STA parses the feedback indication message and determines that the STA belongs to the target STA, the STA sends an acknowledgment message to the AP by using the first communication resource, and the acknowledgment message is the feedback indication message. , a high efficiency long training sequence, and a first resource scheduling message are used to indicate that they have been received.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeding back an acknowledgment message to the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

In an embodiment of the present invention, the access point uses a feedback indication message, a high efficiency length training sequence, and a resource scheduling message (first resource) to trigger the station to feed back the station's channel state information to the access point. scheduling messages, etc.) to the station. The station may receive the feedback indication message, the high efficiency length training sequence and the resource scheduling message sent by the access point, and when determining that the station belongs to the target station, the station receives the feedback indication message, the high efficiency length training sequence , and feedback an acknowledgment message to the access point to indicate that the resource scheduling message has been received. In general, a station may feed back an acknowledgment message to the access point when the station cannot immediately feed back channel state information. When the station can immediately feed back the channel state information, the station may return the channel state information directly to the access point, or it may return an acknowledgment message first. Channel state information can be fed back by using beamforming report (BF report) frames as carriers.

In an embodiment of the present invention, the acknowledgment message does not carry channel state information and is only used to indicate that feedback indication messages, high efficiency length training sequences and resource scheduling messages have been received. . In other words, the acknowledgment message is used to explicitly indicate that the feedback indication message, the high efficiency length training sequence and the resource scheduling message have been received, after which the access point indicates that the station has received the channel state information. In order to be able to give feedback, it is also necessary to trigger the station. The acknowledgment message may be an Acknowledgment (ACK) frame or may be a Block Acknowledgment (BA) frame.

In an embodiment of the present invention, in order to avoid communication interference between stations when multiple stations feed back channel state information to an access point, the communication resources used by multiple stations are time domain resources, frequency They differ from each other with respect to at least one of domain resources or spatial domain resources. For example, communication resources used by multiple stations may be identical with respect to time domain resources but do not interfere with each other (e.g., are orthogonal) with respect to frequency domain resources, or may be identical with respect to time domain resources. , do not interfere with each other (eg, are orthogonal) with respect to spatial domain resources.

Specifically, the feedback indication message may be used to indicate at least two target STAs that should feed back channel state information to the access point. The feedback indication message may contain identifier information of the target station for which feedback should be performed, feedback type (such as single-user feedback or multi-user feedback), column quantity that needs to be fed back, and the like. The content and format of the feedback indication message may be similar to those of information carried in NDPA frames sent by APs in broadcast form in the prior art. To avoid repetition, its detailed description is omitted here. A station may perform channel estimation according to the high efficiency length training sequence to determine the channel state information of the target STA. The amount of symbols in a high efficiency long training sequence is usually equal to the amount of antennas in the access point in order to allow the station to fully measure the channel. The function, generation method and usage method of the efficient long training sequence are similar to those of the long training sequence in the prior art NDP used for channel estimation. To avoid repetition, its detailed description is omitted here. The resource scheduling message is used to indicate the communication resource (such as the first communication resource) to be used by each target STA when the target STA performs uplink multi-user feedback. For example, communication resources may include resource block location information, resource parameter information, and the like used when a station performs uplink data transmission. The communication resources are allocated in the same time period so that channel state information can be transmitted between the AP and multiple target STAs in a form such as Orthogonal Frequency Division Multiple Access (OFDMA). They may be frequency domain resources that correspond but do not interfere with each other in the frequency domain (eg, are orthogonal).

In this embodiment of the present invention, the access point sends feedback indication messages, high efficiency length training sequences, and resource scheduling messages in broadcast form to multiple stations by sending frames that combine NDPA, NDP, and trigger frames. can be sent to However, the particular manner in which the NDPA, NDP, and trigger frames are combined is not limited. For example, the access point may send an NDPA first, followed by a combined NDP and trigger frame. The NDPA may contain a feedback indication message, and the combined NDP and trigger frame may contain a resource scheduling message and a high efficiency length training sequence used by multiple stations to feed back channel state information. The resource scheduling message may be carried within a High Efficiently Signal B Field (HE-SIG-B), and the high efficiency length training sequence may be carried within the same frame (or same data packet). It can be carried in the long training sequence (HE-LTF, highly efficient long training filed) field.

As another example, the access point may first send the combined NDPA frame and trigger frame, followed by the NDP. A combined NDPA frame and trigger frame may contain a feedback indication message and a resource scheduling message for each station. For a combined NDPA frame and trigger frame, each station's information field can be introduced into the NDPA to indicate the feedback indication message corresponding to each station. The feedback indication message may include parameters for estimating or feeding back channel state information by each STA. Resource scheduling messages may include resource block location information, resource parameter information, and the like used when each station performs uplink transmission, eg, space-time stream quantities. The NDP may contain the same amount of efficient long training sequences as the access point's antenna amount.

To give another example, the access point may directly send a combined NDPA, NDP, and trigger frame to the station. The feedback indication message contained within the NDPA and the resource scheduling message contained within the trigger frame may be carried within the HE-SIG-B field of the combined frame, and the high-efficiency length training sequence may be transmitted within the same frame (or the same data packet) in the HE-LTF field. Furthermore, the resource scheduling message may be carried specifically within the HE-SIG-B field of the NDP, and the high efficiency length training sequence may be carried specifically within the HE-LTF field of the same NDP frame. , the feedback indication message may be carried in a field placed after the HE-LTF field of the same NDP frame.

A frame combining two or three frames referred to in this embodiment of the invention can be obtained by extending or reusing an existing frame structure, or a combined frame can be obtained in this embodiment of the invention It can be obtained by designing a new frame structure to perform the required function. A combination frame may contain fields that are used to indicate that a special function has been assigned to the combination frame, and certain fields may be used to indicate the type of combination frame. In other words, the combined frames may be placed in different fields of the same data packet, or the combined frames may be carried within the same MAC frame, or there is a combination of the above two cases. A frame that combines three frames may be a combined frame containing any two or all of the three frames.

In this embodiment of the present invention, after receiving the combined frame of NDPA, NDP and trigger frames, the station may determine whether feedback should be performed immediately according to the station's capabilities. A station may feed back channel state information to the access point after X Interframe Space (XIFS), when the station can perform feedback immediately. When a station cannot immediately feed back channel state information, the station may first feed back an acknowledgment message to the access point to indicate that said combined frame has been received, and estimate the channel state information.

In this embodiment of the invention, the particular reason why a station cannot perform feedback immediately is not limited. For example, the station has limited capacity, or the priority for buffering channel state information by the station is below a first threshold, or the number of resource blocks within the communication resources allocated to the station by the access point. When the size is below the threshold, it may be considered that the station cannot immediately perform feedback.

Optionally, the station may determine the first channel state information according to the high efficiency length training sequence.

A beamforming report is typically a frame carrying a large number of bytes, while an acknowledgment message is typically a short frame with only a few bytes or a few dozen bytes. When the access point allocates a relatively large resource block to the station according to the resource scheduling message and data buffered by the station, the station may send another frame when feeding back the acknowledgment message to the access point. For example, ACK frames and data frames may be sent together by aggregation. To give another example, when feeding back the acknowledgment message, the station is designed so that the access point learns that the station needs to transmit uplink data and learns the resources needed by the station. To do so, a resource allocation request message may be sent along with it to report the station's uplink data buffering information to the access point. To give another example, when feeding back an acknowledgment message, the station may jointly report to the access point how long it should take before the station feeds back channel state information. In this way, when feeding back the acknowledgment message to the access point, the station will also feed back other information together to further improve resource transmission efficiency and avoid resource waste.

Optionally, after receiving the feedback indication message, the high efficiency length training sequence and the resource scheduling message, the target station may determine whether to immediately feed back the channel state information (such as the first channel state information). . When the target STA cannot immediately feed back the channel state information, X inter-frame spaces XIFS after receiving the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message, the target STA sends the first may send an acknowledgment message to the AP by using the communication resource of .

Optionally, the station may receive a second resource scheduling message sent by the AP, the second resource scheduling message being used by the target STA when the target STA feeds back the second channel state information Used to indicate a second communication resource, the station may send second channel state information to the AP by using the second communication resource, the second channel state information Some or all of the state information.

Specifically, after a period of time after receiving the acknowledgment message, the access point may send another resource scheduling message (such as a second resource scheduling message) to the target station. The second resource scheduling message is used to indicate communication resources (such as second communication resources) to be used by the target STA when the target STA feeds back channel state information (such as second channel state information). be done. After receiving the second resource scheduling message, the station may send some or all of the channel state information that has not been successfully fed back to the access point by using the second communication resource.

After the station receives the second resource scheduling message, when the station sends to the access point a portion of the channel state information that is not successfully fed back by using the second communication resource, the access point , may continue to send polling scheduling messages and resource scheduling messages to the station to allow the station to continue feeding back channel state information to the access point until the channel state information is fully fed back. Polling scheduling messages may be carried within beamforming report poll frames, which may include an indication field used to indicate that content should continue to be transmitted. When a station cannot completely feed back beamforming reports to the access point at one time, the station divides the beamforming report into multiple segments, and during each feedback, the amount of non-fed backed segments is sent to the access point. can report. The access point uses the station's feedback and the access point's reception status (e.g., the resource block size of the communication resource allocated by the access point) to indicate which segments the station should feed back during its next transmission. or whether the access point successfully receives the requested acknowledgment message or channel state information), it may send a beamforming report poll frame to the station.

For example, a station may receive a first polling scheduling message and a third resource scheduling message sent by the AP. The first polling scheduling message is used by the AP to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A third resource scheduling message is used to indicate a third communication resource to be used by the target STA when the target STA feeds back third channel state information. The station may send third channel state information to the AP by using a third communication resource.

the segment information of the third channel state information within the first channel state information may be indication information indicating which segments need to be fed back when the third channel state information is fed back; or , may indicate which segment needs to be fed back.

In this embodiment of the invention, the particular form of combining the polling scheduling message (such as the first polling scheduling message) and the resource scheduling message (such as the third resource scheduling message) is not specifically limited. The structure of the combined polling scheduling message and resource scheduling message frame may be obtained by reusing an existing frame structure, e.g. by extending and reusing an existing trigger frame or beamforming report poll frame. , or by designing a new frame structure that satisfies the function.

Optionally, the first polling scheduling message and the third resource scheduling message may be carried within the same data packet or within the same frame of the same data packet.

The polling scheduling message and the resource scheduling message may be carried within the same frame designed based on the trigger frame. A frame includes a Frame Control field, a BF Report Poll type indication field, a Resource allocation reuse indication field, a Station Identifier field, and resource allocation information. (Resource allocation information) field, and Feedback segment Retransmission Bitmap (Feedback segment Retransmission Bitmap) field. A frame control field may be used to indicate which frame may be used for resource scheduling. A beamforming report poll type indication field may be used to indicate the type of frame. Specifically, the Feedback Segment Retransmission Bitmap field may be used to indicate which segments should be transmitted. The resource allocation information field may contain resource scheduling messages. A Resource Allocation Reuse Indication field may be used to indicate whether the communication resources indicated by the frame are the same as those used in previous transmissions. The Resource Allocation Information field may not be required when the communication resources indicated by the frame are the same as those used in the previous transmission. Instead, communication resources used in previous transmissions are used directly for the transmission. Communication resources indicated by a resource scheduling message contained within a resource allocation information field in a frame may be used for transmission when the communication resources indicated by the frame are different from those used in previous transmissions. . The Station Identifier field is used to indicate stations that need to feed back channel state information to the access point.

For example, the first polling scheduling message and the third resource scheduling message may be carried within the trigger frame of the same data packet. The trigger frame may include a first beamforming report poll type indication field and a first feedback segment retransmission bitmap field. The trigger frame may further include at least one of a first resource allocation information field or a first resource allocation reuse indication field. A third resource scheduling message is placed within the first resource allocation information field. The first poll scheduling message is placed in the first feedback segment retransmission bitmap field. The first resource allocation reuse indication field is used to indicate whether the third resource scheduling message is the same as the second resource scheduling message. The third channel state information is sent to the AP by using the second communication resource when the third resource scheduling message is the same as the second resource scheduling message.

Optionally, the trigger frame may further include the STA's identifier field.

Taking another example, the first polling scheduling message and the third resource scheduling message are carried within a beamforming report poll BF report poll frame of the same data packet. A BF report poll frame may include a receiver address field, a second feedback segment retransmission bitmap field, and a third feedback segment retransmission bitmap field. The BF report poll frame may further include at least one of a second resource allocation information field or a second resource allocation reuse indication field. A third resource scheduling message is placed in the second resource allocation information field. The first polling scheduling message is placed in the third feedback segment retransmission bitmap field. The indication information of the third resource scheduling message is placed in the second resource allocation reuse indication field.

A frame control field may be used to indicate that the frame may be used to poll for beamforming reports. The associated address field can be used to indicate the identifier of the polled station. A Feedback Segment Retransmission Bitmap field within the Original Beamforming Report Poll Frame field may be used to indicate that a certain type of frame is a combined beamforming report poll frame and trigger frame. The resource allocation information field may contain resource scheduling messages. A Resource Allocation Reuse Indication field may be used to indicate whether the communication resources indicated by the frame are the same as those used in previous transmissions. The Resource Allocation Information field may not be required when the communication resources indicated by the frame are the same as those used in the previous transmission. Instead, communication resources used in previous transmissions are used directly for the transmission. Communication resources indicated by a resource scheduling message contained within a resource allocation information field in a frame may be used for transmission when the communication resources indicated by the frame are different from those used in previous transmissions. . The third Feedback Segment Retransmission Bitmap field is a Feedback Segment Retransmission Bitmap field with a one-to-one correspondence with each station.

Optionally, the BF report poll frame may further include the STA's identifier field.

The particular form of indicating that the reused frame or designed new frame is the frame used to trigger multi-user channel state information transmission is not limited to this embodiment of the invention.

In an embodiment of the present invention, the BF report poll frame being the poll frame used to trigger multi-user channel state information transmission is determined by the receiver address field, the second feedback segment retransmission bitmap field, or in any one of the forms of the length of the BF report poll frame.

For example, the receiver address field is the original frame's media address field to indicate that the frame is a combined BF report poll frame and a trigger frame and is the frame used to trigger multi-user channel state information transmission. It can be changed from a Media Access Control (MAC) address to a broadcast MAC address or a designated address.

In embodiments of the present invention, the Second Feedback Segment Retransmission Bitmap field may be used to indicate that BF report poll frames are used to trigger multi-user channel state information transmission. For example, the second feedback segment retransmission bitmap field is used to combine the BF report poll frame and the trigger frame to indicate that the frame is the frame used to trigger multi-user channel state information transmission. , can be set to zero.

In embodiments of the present invention, the frame length may be used to indicate the type of frame. Generally, in the 802.11ac standard, the length of BF report poll frames is fixed. Therefore, the length of the frame can be used to indicate that the frame is the frame used to combine the BF report poll frame and the trigger frame and trigger multi-user channel state information transmission.

Additionally, a new type of MAC frame may be defined to clearly indicate that the frame is a combined BF report poll frame and trigger frame.

In this embodiment of the present invention, a station is used as an example for illustration, and each station may decide to feed back acknowledgment messages or channel state information according to its station's capabilities.

In FIG. 1B above, a method for transmitting channel state information according to an embodiment of the present invention is detailed from a station's perspective. The following describes methods for transmitting channel state information according to embodiments of the present invention from the perspective of the access point.

Method embodiment 2
FIG. 2 is a schematic flow diagram of a method for transmitting channel state information according to another embodiment of the present invention. The method of FIG. 2 may be performed by an access point.

201. sending a feedback indication message, a high efficiency length training sequence and a first resource scheduling message to the station STA, the feedback indication message being used to indicate at least two target STAs that need to feed back channel state information; The high efficiency length training sequence is used to determine the first channel state information of the target STA, and the first resource scheduling message is the target STA receiving the feedback indication message, the high efficiency length training sequence and the first resource. Used to indicate the first communication resource used by the target STA when performing feedback according to the scheduling message.

202. Receive an acknowledgment message sent by the target STA by using the first communication resource, the acknowledgment message being that the target STA receives the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. is used to indicate that a

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeding back an acknowledgment message to the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, receiving an acknowledgment message sent by the target STA by using the first communication resource comprises: the target STA sending the feedback indication message, the high efficiency length training sequence; and X interframe spaces XIFS after receiving the first resource scheduling message, receiving an acknowledgment message sent by the target STA by using the first communication resource, wherein the target STA: Receiving the first channel state information, which cannot be immediately fed back.

Optionally, in an embodiment of the present invention, the method comprises sending a second resource scheduling message, the second resource scheduling message being sent to the target STA when the target STA feeds back the second channel state information. and receiving second channel state information sent by the target STA by using the second communication resource. and wherein the second channel state information is part or all of the first channel state information.

Optionally, in an embodiment of the present invention, the method comprises sending a first polling scheduling message and a third resource scheduling message, wherein the first polling scheduling message directs the target STA to a third channel condition. Used to request information, the first polling scheduling message includes segment information of the third channel state information within the first channel state information, the third channel state information being the second channel state. The information is part or all of the first channel state information removed from it, and the third resource scheduling message is the third resource scheduling message used by the target STA when the target STA feeds back the third channel state information. sending used to indicate the communication resource; and receiving third channel state information sent by the target STA by using the third communication resource;

Optionally, in an embodiment of the invention the first polling scheduling message and the third resource scheduling message are carried within the same data packet.

Optionally, in embodiments of the present invention, the first polling scheduling message and the third resource scheduling message are carried within the trigger frame of the same data packet. The trigger frame includes a first beamforming report poll type indication field and a first feedback segment retransmission bitmap field. The trigger frame further includes at least one of a first resource allocation information field or a first resource allocation reuse indication field. A third resource scheduling message is placed within the first resource allocation information field. The first poll scheduling message is placed in the first feedback segment retransmission bitmap field. The first resource allocation reuse indication field is used to indicate whether the third resource scheduling message is the same as the second resource scheduling message.

Optionally, in embodiments of the present invention, the trigger frame further includes an identifier field of the STA.

Optionally, in an embodiment of the present invention, the first polling scheduling message and the third resource scheduling message are carried within a beamforming report poll BF report poll frame of the same data packet. A BF report poll frame may include a receiver address field, a second feedback segment retransmission bitmap field, and a third feedback segment retransmission bitmap field. The BF report poll frame may further include at least one of a second resource allocation information field or a second resource allocation reuse indication field. A third resource scheduling message is placed in the second resource allocation information field. The first polling scheduling message is placed in the third feedback segment retransmission bitmap field. The indication information of the third resource scheduling message is placed in the second resource allocation reuse indication field.

Optionally, in an embodiment of the present invention, the BF report poll frame further includes the STA's identifier field.

Optionally, in embodiments of the present invention, the BF report poll frame is the poll frame used to trigger multi-user channel state information transmission, the receiver address field, the second feedback segment retransmission Indicated in any one of the following forms: bitmap field, or length of BF report poll frame.

Optionally, in embodiments of the present invention, target STAs that cannot immediately feed back the first channel state information have the first channel state information buffered by the target STA, where the target STA has limited capabilities at least one of the following: the priority for the communication is less than the first threshold, or the size of the resource block within the first communication resource is less than the threshold.

The method of transmitting channel state information according to this embodiment of the invention may be performed by an access point, which may perform corresponding procedures according to the embodiment of FIG. 1B performed by the access point. For the sake of brevity, the details are not described again here.

Referring to FIG. 1B and FIG. 2, the foregoing describes in detail the station's determination of the feedback content after the station receives the feedback indication message, the high efficiency length training sequence and the resource scheduling message. 3 and 4, the following shows that when the access point sends the feedback indication message, the high efficiency length training sequence and the resource scheduling message, the access point determines the feedback content according to the capability information reported by the station. will be explained in detail.

Method embodiment 3
FIG. 3 is a schematic flow diagram of a method for transmitting channel state information according to yet another embodiment of the present invention. The method of Figure 3 may be performed by a station.

301. Receive a first resource scheduling message, a first feedback indication message, and a first high efficiency length training sequence sent by the access point AP according to the first indication information, the first feedback indication message being a channel Used to indicate at least two target stations STA that need to feed back state information to the AP, the first resource scheduling message or the first feedback indication message includes first indication information, the first The indication information is used to instruct the target STA whether to immediately feed back the channel state information, and the first high efficiency length training sequence is used to determine the first channel state information of the target STA. and the first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back a second channel state information or an acknowledgment message; The state information is part or all of the first channel state information, and the acknowledgment message is that the first feedback indication message, the first high efficiency length training sequence, and the first resource scheduling message have been received. used to indicate

302. performing channel estimation according to a first high efficiency length training sequence to determine first channel state information when the first feedback indication message is analyzed and the STA is determined to belong to the target STA; communication resource to send the second channel state information or acknowledgment message to the AP.

In this embodiment of the present invention, the access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to the stations to schedule a plurality of stations to transmit channel state information; may instruct the station whether to perform immediate feedback, and the station may feed back channel state information or acknowledgment messages to the access point as directed by the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

In embodiments of the present invention, an access point may receive capability information reported by a station regarding whether the station can perform immediate feedback. After receiving the capability information, the access point determines the indication information used to instruct the station whether to immediately perform feedback according to the capability information and the access point's status. After determining the indication information, the access point may add the indication information to a feedback indication message or a resource scheduling message, the access point triggering the station to feed back the station's channel state information to the access point, Feedback indication messages, efficient length training sequences, and resource scheduling messages may be sent to stations. After receiving the feedback indication message, the high efficiency length training sequence, and the resource scheduling message, the station may feed back channel state information or an acknowledgment message to the access point according to the indication information.

Optionally, the STA receives the first feedback indication message sent by the AP and the first high efficiency length when the first indication information instructs the target STA not to immediately feed back the channel state information. A first resource scheduling message is received X interframe spaces XIFS after the training sequence is received. The first feedback indication message includes first indication information. X inter-frame spaces XIFS after receiving the first resource scheduling message, the station receives the first resource scheduling message, the first feedback indication message, and the first high frequency by using the first communication resource. Send second channel state information to the AP according to the efficiency length training sequence.

When the indication information sent by the access point (such as the first indication information) instructs the station not to immediately perform feedback, the access point may first send NDPA and NDP to the station, where NDPA is , can be used to indicate that the current feedback is non-immediate feedback. After receiving the NDPA and NDP, the station does not need to perform feedback immediately. Additionally, the access point sends a resource scheduling message (such as the first resource scheduling message) to the station after XIFS. After receiving the resource scheduling message sent by the access point, the station may feed back channel state information (eg, second channel state information) to the access point.

Stations may feed back some or all of the channel state information to the access point. That is, the station may feed back the channel state information to the access point once, or may perform the feedback twice or multiple times. For example, the second channel state information may be part or all of the first channel state information, where the first channel state information is all channel state information obtained by the station through channel estimation.

After the access point receives the second channel state information, if the second channel state information is part of the first channel state information, the access point may fully feedback the first channel state information. Stations may continue to be requested for channel state information that has not been successfully fed back in order to cause the station to continue to feed back channel state information until the station is successfully fed back.

For example, the station may receive a first polling scheduling message and a second resource scheduling message sent by the AP, the first polling scheduling message being used to request third channel state information from the target STA. and the first polling scheduling message includes segment information of the third channel state information within the first channel state information, the third channel state information being the second channel state information from which the second channel state information is removed. 1 channel state information, and the second resource scheduling message is for indicating a second communication resource to be used by the target STA when the target STA feeds back the third channel state information. used, the station may send the third channel state information to the AP by using the second communication resource.

Optionally, X inter-frame spaces XIFS after the first resource scheduling message is sent, an acknowledgment message when the first indication information instructs the target STA not to immediately feed back the channel state information is sent to the AP according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence by using the first communication resource.

After receiving the acknowledgment message sent by the station, the access point may send a resource scheduling message to the station to schedule the station to feed back channel state information to the access point. Resource scheduling messages may be carried in trigger frames to trigger stations to feed back channel state information to the access point.

For example, the station may receive a third resource scheduling message sent by the AP, the third resource scheduling message being a third channel state information used by the target STA when the target STA feeds back fourth channel state information. used to indicate the communication resources of A station may send fourth channel state information by using a third communication resource, where the fourth channel state information is part or all of the first channel state information.

Herein, the AP gives different instructions to different STAs by using the indication information, for example, the AP instructs some stations to immediately perform feedback, When instructing some stations not to The AP may send resource scheduling messages and polling scheduling messages in the following steps to simultaneously schedule stations to feed back channel state information. If the AP instructs all the different STAs not to immediately perform feedback by using the indication information, the AP may use the following to trigger stations to feedback channel state information: Only resource scheduling messages can be sent in steps.

When the fourth channel state information is part of the first channel state information, the access point uses resource Scheduling messages and polling scheduling messages may continue to be sent to stations.

The resource scheduling message and the polling scheduling message may be carried in different frames or may be carried in the same frame of the same data packet. In this embodiment of the invention, the particular form of combining polling scheduling messages and resource scheduling messages is not specifically limited. The structure of the combined polling scheduling message and resource scheduling message frame may be obtained by reusing an existing frame structure, e.g. by extending and reusing an existing trigger frame or beamforming report poll frame. , or by designing a new frame structure that satisfies the function. Resource scheduling messages and polling scheduling messages may be carried within the same data packet trigger frame or BF report poll frame. A case where an existing trigger frame or BF report poll frame is reused was described in the description of FIG. 1B. To avoid repetition, the details are not described again here.

For example, the station may receive a second polling scheduling message and a fourth resource scheduling message sent by the AP. A second polling scheduling message is used to request fifth channel state information from the target STA. The second polling scheduling message includes segment information of the fifth channel state information within the first channel state information. The fifth channel state information is part or all of the first channel state information from which the fourth channel state information is removed. A fourth resource scheduling message is used to indicate a fourth communication resource to be used by the target STA when the target STA feeds back the fifth channel state information. The station may send fifth channel state information to the AP by using a fourth communication resource.

Optionally, when the first indication information instructs the target STA to immediately feed back the channel state information, X inter-frame spaces XIFS after the first resource scheduling message is sent, the second channel State information is sent to the AP according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence by using the first communication resource.

When the second channel state information is part of the first channel state information, the access point receives the channel state information that has not been successfully fed back until the first channel state information has been completely fed back. Stations may continue to be requested.

For example, the station may receive a third polling scheduling message and a fifth resource scheduling message sent by the AP. A third polling scheduling message is used to request sixth channel state information from the target STA. The third polling scheduling message includes segment information of the sixth channel state information within the first channel state information. The sixth channel state information is part or all of the first channel state information from which the second channel state information is removed. A fifth resource scheduling message is used to indicate a fifth communication resource to be used by the target STA when the target STA feeds back sixth channel state information. A station may send a sixth channel state information to the AP by using a fifth communication resource.

In this embodiment of the invention, how to dictate whether feedback should be performed immediately is not limited. For example, specific fields within the first indication information may be used to instruct, or time sequences for sending feedback indication messages, high efficiency length training sequences, and resource scheduling messages may be used to instruct or communication resources. The size of the resource blocks in or the amount of spatial streams used by the resource blocks may be used for the instructions.

Optionally, the first indication information may include a field used to indicate when the target STA feeds back channel state information.

Optionally, the first indication information may include a field used to instruct all target STAs or each target STA separately whether to immediately feed back channel state information.

Optionally, the first indication information indicates non-immediate feedback when the first resource scheduling message is sent after the first feedback indication message and the first high efficiency length training sequence are sent used for

Optionally, the size of a resource block within the first communication resource is less than a first threshold or the amount of spatial streams used by the resource block within the first communication resource is a second the first indication information is used to indicate non-immediate feedback when below the threshold; or
A size of a resource block within the first communication resource is greater than or equal to a first threshold, or an amount of spatial streams used by the resource block within the first communication resource is greater than or equal to a second threshold The first indication information is used to indicate immediate feedback when .

In this embodiment of the present invention, the frames in which the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message are placed are not limited. For example, the access point may separately send NDPA, NDP, and trigger frames to the station when the access point determines not to instruct the station to immediately feed back channel state information. As a result, the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message are placed in different frames.

Optionally, the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message are located in different frames.

In this embodiment of the invention, the data packet or frame in which the resource scheduling message and the polling scheduling message corresponding to the resource scheduling message are placed are not limited. The resource scheduling message and the polling scheduling message may be located within the same data packet, or may be located within the same frame of the same data packet, or may be located within different data packets, or may be located within the same data packet. It can be placed in different frames.

Optionally, the first polling scheduling message and the second resource scheduling message may be placed in the same data packet, or the second polling scheduling message and the fourth resource scheduling message may be placed in the same data packet. Alternatively, the third polling scheduling message and the fifth resource scheduling message may be placed within the same data packet.

In this embodiment of the invention, a station is used as an example for illustration. The access point may command all stations to perform feedback immediately, or may command all stations not to perform feedback immediately, or may perform feedback immediately. can be instructed separately to each station not to run. When the access point separately instructs each station to perform feedback immediately or not to perform feedback immediately, and the station only feeds back part of the channel state information during the first feedback, then: , the access point may send resource scheduling messages and polling scheduling messages to the stations.

Method embodiment 4
FIG. 4 is a schematic flow diagram of a method for transmitting channel state information according to yet another embodiment of the present invention. The method of FIG. 4 may be performed by an access point.

401. Determining first indication information, the first indication information is used to instruct at least two target STAs whether to immediately feedback channel state information, and the at least two target STAs communicate channel state information to the AP. State information needs to be fed back.

402. Send a first resource scheduling message, a first feedback indication message, and a first high efficiency length training sequence to the target STA according to the first indication information, wherein the first resource scheduling message or the first feedback indication message is , including first indication information, the first feedback indication message is used to indicate at least two target stations STA that need to feed back channel state information to the AP, and a first high efficiency length training sequence is used to determine the first channel state information of the target STA, and the first resource scheduling message is used by the target STA when the target STA feeds back the second channel state information or an acknowledgment message The second channel state information is used to indicate the first communication resource, the second channel state information is part or all of the first channel state information, the acknowledgment message is the first feedback indication message, the first Used to indicate that a high efficiency long training sequence and first resource scheduling message have been received.

403. Second channel state information or an acknowledgment sent by the target STA according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence by using the first communication resource. Receive messages.

In this embodiment of the present invention, the access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to the stations to schedule a plurality of stations to transmit channel state information; may instruct the station whether to perform immediate feedback, and the station may feed back channel state information or acknowledgment messages to the access point as instructed by the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, sending the first resource scheduling message, the first feedback indication message and the first high efficiency length training sequence according to the first indication information comprises: the first resource X interframe spaces XIFS after sending the first feedback indication message and the first high efficiency length training sequence when the information instructs the target STA not to immediately feed back the channel state information; Sending a scheduling message. The first feedback indication message includes first indication information. Second channel state information or an acknowledgment sent by the target STA according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence by using the first communication resource. The step of receiving the message includes, X interframe spaces XIFS after sending the first resource scheduling message, by using the first communication resource, the first resource scheduling message, the first feedback indication message, and Receiving second channel state information sent by the target STA according to the first high efficiency length training sequence.

Optionally, in an embodiment of the present invention, the method comprises sending a first polling scheduling message and a second resource scheduling message, wherein the first polling scheduling message directs the target STA to a third channel condition. Used to request information, the first polling scheduling message includes segment information of the third channel state information within the first channel state information, the third channel state information being the second channel state The information is part or all of the first channel state information removed from it, and the second resource scheduling message is the second resource scheduling message used by the target STA when the target STA feeds back the third channel state information. Sending used to indicate the communication resource; and receiving third channel state information sent by the target STA by using the second communication resource.

Optionally, in an embodiment of the present invention, by using a first communication resource, by the target STA according to the first resource scheduling message, the first feedback indication message and the first high efficiency length training sequence. Receiving the sent second channel state information or acknowledgment message sends the first resource scheduling message when the first instruction information instructs the target STA not to immediately feed back the channel state information. X inter-frame spaces XIFS after being sent by the target STA according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence by using the first communication resource. receiving an acknowledgment message.

Optionally, in an embodiment of the present invention, the method is sending a third resource scheduling message, the third resource scheduling message is sent to the target STA when the target STA feeds back the fourth channel state information. and receiving fourth channel state information sent by the target STA by using the third communication resource. A, wherein the fourth channel state information is part or all of the first channel state information;

Optionally, in an embodiment of the present invention, the method comprises sending a second polling scheduling message and a fourth resource scheduling message, wherein the second polling scheduling message directs the target STA to a fifth channel condition. Used to request information, the second polling scheduling message includes segment information of the fifth channel state information within the first channel state information, the fifth channel state information being the fourth channel state. The information is part or all of the first channel state information removed from it, and the fourth resource scheduling message is the fourth resource scheduling message used by the target STA when the target STA feeds back the fifth channel state information. Further comprising sending, used to indicate the communication resource, and receiving fifth channel state information sent by the target STA by using a fourth communication resource.

Optionally, in an embodiment of the present invention, by using a first communication resource, by the target STA according to the first resource scheduling message, the first feedback indication message and the first high efficiency length training sequence. Receiving the sent second channel state information or acknowledgment message sends the first resource scheduling message when the first instruction information instructs the target STA to immediately feed back the channel state information. after X interframe spaces XIFS later, by using the first communication resource, according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence, sent by the target STA Receiving second channel state information.

Optionally, in an embodiment of the present invention, the method comprises sending a third polling scheduling message and a fifth resource scheduling message, wherein the third polling scheduling message directs the target STA to a sixth channel condition. Used to request information, the third polling scheduling message includes segment information of the sixth channel state information within the first channel state information, the sixth channel state information being the second channel state. The information is part or all of the first channel state information removed from it, and the fifth resource scheduling message is the fifth resource scheduling message used by the target STA when the target STA feeds back the sixth channel state information. Sending used to indicate communication resources; and receiving sixth channel state information sent by the target STA by using a fifth communication resource.

Optionally, in an embodiment of the present invention, the first indication information includes a field used to indicate the time when the target STA feeds back the channel state information.

Optionally, in an embodiment of the present invention, the first indication information is used to instruct all target STAs or instruct each target STA separately whether to immediately feed back the channel state information Contains fields.

Optionally, in an embodiment of the present invention, when the first resource scheduling message is sent after the first feedback indication message and the first high efficiency length training sequence are sent to the target STA, the first indication Information is used to direct non-immediate feedback.

Optionally, in embodiments of the present invention, the size of the resource block within the first communication resource is less than the first threshold or the spatial stream used by the resource block within the first communication resource is less than a second threshold, the first indication information is used to indicate non-immediate feedback, or the size of the resource block within the first communication resource is less than the first The first indication is immediate feedback when greater than or equal to one threshold or the amount of spatial streams used by resource blocks within the first communication resource is greater than or equal to a second threshold. used to indicate

Optionally, in embodiments of the present invention, the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message are placed in different frames.

Optionally, in embodiments of the present invention, the first polling scheduling message and the second resource scheduling message are placed in the same data packet, or the second polling scheduling message and the fourth resource scheduling message are placed in the same data packet, or the third polling scheduling message and the fifth resource scheduling message are placed in the same data packet.

The resource scheduling message and the polling scheduling message may be carried in different frames or may be carried in the same frame of the same data packet. In this embodiment of the invention, the particular form of combining polling scheduling messages and resource scheduling messages is not specifically limited. The structure of the combined polling and resource scheduling message frame may be obtained by reusing an existing frame structure, e.g. by extending and reusing an existing trigger frame or beamforming report poll frame. , or by designing a new frame structure that satisfies the function. Resource scheduling messages and polling scheduling messages may be carried within the same data packet trigger frame or BF report poll frame. A case where an existing trigger frame or BF report poll frame is reused was described in the description of FIG. 1B. To avoid repetition, the details are not described again here.

The method of transmitting channel state information according to this embodiment of FIG. 4 may be performed by an access point, which may perform corresponding procedures according to the embodiment of FIG. 3 performed by the access point. For the sake of brevity, the details are not described again here.

5 and 6, the following describes in detail the subsequent procedure for the station to feed back the channel state information after receiving the feedback indication message, the efficient length training sequence and the resource scheduling message.

Method embodiment 5
FIG. 5 is a schematic flow diagram of a method for transmitting channel state information according to yet another embodiment of the present invention. The method of Figure 5 may be performed by a station.

501. A station STA receives a feedback indication message sent by an access point AP, a high-efficiency length training sequence, and a first resource scheduling message, and the feedback indication message has at least two channel state information to feed back to the AP. The high efficiency length training sequence is used to determine the first channel state information of the target STA, and the first resource scheduling message is used to direct the target STA to the second channel. Used to indicate a first communication resource to be used by the target STA when feeding back state information, the second channel state information is part of the first channel state information.

502. When the feedback indication message is analyzed and the STA is determined to belong to the target STA, perform channel estimation according to the high efficiency length training sequence to obtain first channel state information and use the first communication resource. to send the second channel state information to the AP.

503. receiving a first polling scheduling message and a second resource scheduling message sent by the AP, the first polling scheduling message being used by the AP to request third channel state information from the target STA; includes segment information of the third channel state information within the first channel state information, the third channel state information being the first channel state from which the second channel state information is removed. Part or all of the information, the second resource scheduling message is used to indicate the second communication resource to be used by the target STA when the target STA feeds back the third channel state information.

504. Sending third channel state information to the AP by using a second communication resource.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , channel state information is fed back to the access point, and the access point sends polling scheduling messages and resource scheduling messages to trigger stations to continue feeding back channel state information to the access point that has not been successfully fed back. You can keep sending more. In this manner, resource waste caused when feedback cannot be performed at one time due to insufficient resources can be avoided and channel state information transmission efficiency can be improved.

In an embodiment of the present invention, the access point uses a feedback indication message, a high efficiency length training sequence, and a resource scheduling message (first resource) to trigger the station to feed back the station's channel state information to the access point. scheduling messages, etc.) to the station. A station may receive feedback indication messages, high efficiency length training sequences, and resource scheduling messages sent by the access point. When a station determines that it belongs to the target station, the station feeds back channel state information to the access point. When the channel state information fed back for the first time is not all of the channel state information, the access point sends a polling scheduling message (see below) to trigger stations to continue to feed back channel state information that has not been successfully fed back. A first polling scheduling message, etc.) and a resource scheduling message (such as a second resource scheduling message) may be sent to the station. A station may complete feedback at one time, or may perform feedback multiple times.

The resource scheduling message and the polling scheduling message may be carried in different frames or may be carried in the same frame of the same data packet. In this embodiment of the invention, the particular form of combining polling scheduling messages and resource scheduling messages is not specifically limited. The structure of the combined polling and resource scheduling message frame may be obtained by reusing an existing frame structure, e.g. by extending and reusing an existing trigger frame or beamforming report poll frame. , or by designing a new frame structure that satisfies the function. Resource scheduling messages and polling scheduling messages may be carried within the same data packet trigger frame or BF report poll frame. A case where an existing trigger frame or BF report poll frame is reused was described in the description of FIG. 1B. To avoid repetition, the details are not described again here.

Method embodiment 6
FIG. 6 is a schematic flow diagram of a method for transmitting channel state information according to yet another embodiment of the present invention. The method of FIG. 6 may be performed by an access point.

601. Sending a feedback indication message, a high efficiency length training sequence and a first resource scheduling message to station STAs, the feedback indication message being used to indicate at least two target STAs that need to feed back channel state information to the AP. and the high efficiency length training sequence is used to determine the first channel state information of the target STA, and the first resource scheduling message is sent by the target STA when the target STA feeds back the second channel state information Used to indicate the first communication resource to be used, the second channel state information is part of the first channel state information.

602. Receive second channel state information sent by the target STA by using the first communication resource.

603. sending a first polling scheduling message and a second resource scheduling message to the target STA, the first polling scheduling message being used to request third channel state information from the target STA; contains segment information of the third channel state information within the first channel state information, the third channel state information being the portion of the first channel state information from which the second channel state information is removed; or all, the second resource scheduling message is used to indicate the second communication resource to be used by the target STA when the target STA feeds back the third channel state information.

604. Receive third channel state information sent by the target STA by using the second communication resource.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , channel state information is fed back to the access point, and the access point sends polling scheduling messages and resource scheduling messages to trigger stations to continue feeding back channel state information to the access point that has not been successfully fed back. You can keep sending more. In this manner, resource waste caused when feedback cannot be performed at one time due to insufficient resources can be avoided and channel state information transmission efficiency can be improved.

The method of transmitting channel state information according to this embodiment of the invention may be performed by an access point, which may perform corresponding procedures according to the embodiment of FIG. 5 performed by the access point. For the sake of brevity, the details are not described again here.

The resource scheduling message and the polling scheduling message may be carried in different frames or may be carried in the same frame of the same data packet. In this embodiment of the invention, the particular form of combining polling scheduling messages and resource scheduling messages is not specifically limited. The structure of the combined polling and resource scheduling message frame may be obtained by reusing an existing frame structure, e.g. by extending and reusing an existing trigger frame or beamforming report poll frame. , or by designing a new frame structure that satisfies the function. Resource scheduling messages and polling scheduling messages may be carried within the same data packet trigger frame or BF report poll frame. A case where an existing trigger frame or BF report poll frame is reused was described in the description of FIG. 1B. To avoid repetition, the details are not described again here.

With reference to the specific examples of FIGS. 7-10, the following describes in detail how an access point schedules multiple stations to feed back and transmit channel state information. The following uses examples where the access point schedules only 2 stations or 3 stations at the same time for illustration purposes. However, the invention is not so limited and there may be more than one station.

Method embodiment 7
7A and 7B are interaction diagrams for an access point to schedule multiple stations to transmit channel state information according to an embodiment of the present invention. Figures 7A and 7B separately reflect this embodiment of the invention from two different perspectives. FIG. 7A reflects information or message exchanges between an access point and a station. FIG. 7B reflects frame exchanges between an access point and a station. The essence of FIG. 7B is the same as that of FIG. 7A, as information or messages are carried within frames.

701. The AP sends a first resource scheduling message, a feedback indication message and a high efficiency length training sequence to the STAs.

STAs herein may be STA1, STA2, and STA3 in FIG. 7, and may further include other STAs not shown herein. The access point sends a combined frame of NDPA, NDP, and trigger frames to multiple stations in broadcast form, and in order to schedule multiple stations to perform feedback, a field within the combined frame contains a first Resource scheduling messages, feedback indication messages, and efficient long training sequences may be added. In this embodiment of the invention, the manner in which the NDPA, NDP and trigger frames are combined is not limited. Any two of the NDPA, NDP and trigger frame can be combined in pairs and then the two combined with a third one or NDPA, NDP and trigger frame together can be combined. As for specific combination forms, please refer to the description of FIG. 1B and the details will not be described again here.

There are three sequence numbers 701 in this embodiment of the invention. This indicates that the access point may send a combined NDPA, NDP, and trigger frame in broadcast form to multiple stations simultaneously.

702. The STA feeds back an acknowledgment message or channel state information to the AP.

The station may receive a first resource scheduling message, a feedback indication message, and a high efficiency length training sequence sent by the access point, may estimate channel state information, and may receive the first resource scheduling message, the feedback indication message, and It may be determined to feed back an acknowledgment message to the access point to indicate that the high efficiency length training sequence was received. The station may further determine to feed back channel state information. In general, stations (such as station 1 and station 2) may first feed back an acknowledgment message to the access point when the station cannot immediately perform feedback. A station may feed back channel state information to the access point when the station can perform immediate feedback.

There are three sequence numbers 702 in this embodiment of the invention. The same sequence number is used herein to indicate that multiple stations can simultaneously perform feedback to the access point.

It should be appreciated that multiple stations in this embodiment of the invention may simultaneously feed back different messages to the access point. This is not a limitation of this embodiment of the invention. For example, station 3 may feed back channel state information to the access point, and station 1 and station 2 may feed back acknowledgment messages to the access point. If the access point receives part of the channel state information after station 3 feeds back the channel state information, the access point schedules the station to continue feeding back the channel state information that has not been successfully fed back. To do so, resource scheduling messages and polling scheduling messages may be further sent to the station. In this embodiment of the invention, the example of station 3 feeding back all channel state information at once is used for illustration only.

703. The AP sends a second resource scheduling message to the STA.

After receiving the acknowledgment message, the access point may continue sending a second resource scheduling message to the station to trigger the station to feed back channel state information to the access point.

704. The STA returns channel state information to the AP.

After receiving the second resource scheduling message sent by the access point, the station sends some or all of the channel state information to the access point by using the communication resources indicated by the second resource scheduling message. can give feedback.

Station 1 or station 2 may return all channel state information to the access point, thus ending the procedure. Different stations may have different feedback procedures. For example, at step 704, station 1 may feed back all channel state information to the access point, thereby terminating the procedure. Station 2 may feed back part of the channel state information. In this embodiment of the invention, the example of both station 1 and station 2 feeding back part of the channel state information is used for illustrative purposes.

705. The AP sends a third resource scheduling message and a polling scheduling message to the STA.

When the access point receives the portion of the channel state information fed back by the stations in step 704, the access point feeds back the channel state information that the stations (such as station 1 and station 2) have not successfully fed back. A third resource scheduling message and a polling scheduling message may continue to be sent to the station to keep it going.

706. STAs return channel state information that has not been successfully fed back to the AP.

After receiving the third resource scheduling message and the polling scheduling message sent by the access point, the station may continue to feed back to the access point the channel state information that has not been successfully fed back.

In this embodiment of the invention, channel state information that has not been successfully fed back may be channel state information that has not been fed back to the access point by the station, or has been fed back to the access point by the station, but It may be channel state information that is not correctly received by the access point. When an access point sends a combined BF report poll frame and a trigger frame, stations may feed back channel state information according to the Feedback Segment Retransmit Bitmap field. When the access point sends only the trigger frame, which indicates that the access point has not previously received any information fed back by the station, the station will channel the channel state information starting with the first segment of channel state information. State information may be sent to the access point.

In this embodiment of the invention, STA1, STA2, and STA3 may each be any station. Procedures performed by STA2 may be performed by STA1, and similarly procedures performed by STA1 may be performed by STA2. Merely for simplicity of explanation, STA1, STA2 and STA3 are used to distinguish stations of the present invention and are not intended to limit the protection scope of the present invention.

The steps displayed in the flow diagram of FIG. 7B are in one-to-one correspondence with the steps displayed in the flow diagram of FIG. 7A. The frame structure of FIG. 7B may be used to carry the aforementioned feedback indication messages, efficient length training sequences, resource scheduling messages, and polling scheduling messages. A station may decide to feed back a beamforming report or an acknowledgment frame after receiving a combined frame when the access point commands not to perform immediate feedback by using the frame transmission sequence. The feedback procedure of station 3 ends when station 3 completes the beamforming report feedback at the moment, or the access point successfully feedbacks when station 3 does not complete the beamforming report feedback at the moment. A combined beamforming report poll frame and trigger frame may also be sent to continue triggering stations to feed back channel state information that has not been received. This case is not depicted in this embodiment. When station 1 and station 2 decide not to perform feedback immediately, station 1 and station 2 may first feed back an acknowledgment frame. Channel state information is fed back after the trigger frame sent by the access point is received. Thereafter, if there is still channel state information that has not been successfully fed back, the access point triggers the station to continue feeding back channel state information until the channel state information is completely fed back: A combined beamforming report poll frame and trigger frame may continue to be sent.

FIG. 7 mainly describes cases where the STA may decide to feed back the channel state information or the acknowledgment message after the AP has sent the resource scheduling message, the feedback indication message, and the high efficiency length training sequence to the STA. When a station cannot immediately feed back channel state information, the station may feed back an acknowledgment message first, and feed back the channel state information after the access point further schedules the STA to feed back the channel state information. Therefore, channel state information can be transmitted efficiently and flexibly in subsequent procedures.

Method embodiment 8
8A and 8B are interaction diagrams of an access point scheduling multiple stations to transmit channel state information according to another embodiment of the present invention. Figures 8A and 8B separately reflect this embodiment of the invention from two different perspectives. FIG. 8A reflects information or message exchanges between an access point and a station. FIG. 8B reflects frame exchanges between an access point and a station. The essence of FIG. 8B is the same as that of FIG. 8A, as information or messages are carried within frames.

801. The AP sends feedback indication messages and high efficiency length training sequences to the STAs.

STAs herein may be STA1 and STA2 in FIG. 8, and may further include other STAs not shown herein. The access point may send a feedback indication message and a high efficiency length training sequence to the station to cause the station to perform channel estimation. A feedback indication message may carry an indication message to instruct whether feedback should be performed immediately. For example, when the indication information indicates non-immediate feedback, the station may send the channel state information immediately to ensure that the channel state information can be fed back after a period of time for stations that cannot immediately perform feedback. Sometimes I don't give feedback.

802. AP sends a first resource scheduling message to STAs.

The access point may send a first resource scheduling message to the station, the first resource scheduling message being sent after the feedback indication message and the high efficiency length training sequence are sent, i.e. step 802 after step 801. Yes, and as a result, when the station receives the feedback indication message and the high efficiency length training sequence and cannot feed back the channel state information, the station sends the channel state information to the access point after receiving the first resource scheduling message. can give feedback.

803. The STA returns channel state information to the AP.

A station may not perform feedback immediately after receiving a feedback indication message and a high efficiency length training sequence. Instead, after receiving the first resource scheduling message, the station feeds back some or all of the channel state information to the access point. For example, station 1 and station 2 may feed back some or all of the channel state information to the access point at step 803 . In this embodiment of the invention, the example where both station 1 and station 2 feed back only part of the channel state information is used for illustrative purposes.

804. The AP sends a second resource scheduling message and a polling scheduling message to the STAs.

When the station feeds back part of the channel state information to the access point in step 803, the access point instructs the stations (such as station 1 and station 2) to feed back the channel state information that has not been successfully fed back. You can keep scheduling. Indeed, the access point may continue to schedule stations here one or more times until the channel state information is fully fed back.

805. STAs return channel state information that has not been successfully fed back to the AP.

After receiving the second resource scheduling message and the polling scheduling message sent by the access point, the station may feed back to the access point channel state information that has not been successfully fed back.

In this embodiment of the invention, channel state information that has not been successfully fed back may be channel state information that has not been fed back to the access point by the station, or has been fed back to the access point by the station, but It may be channel state information that is not correctly received by the access point. When an access point sends a combined BF report poll frame and a trigger frame, stations may feed back channel state information according to the Feedback Segment Retransmit Bitmap field. When the access point sends only the trigger frame, which indicates that the access point has not previously received any information fed back by the station, the station will channel the channel state information starting with the first segment of channel state information. State information may be sent to the access point.

In this embodiment of the invention, STA1 and STA2 may each be any station. Procedures performed by STA2 may be performed by STA1, and similarly procedures performed by STA1 may be performed by STA2. Merely for simplicity of explanation, STA1 and STA2 are used to distinguish stations of the present invention and are not intended to limit the protection scope of the present invention.

The steps displayed in the flow diagram of FIG. 8B are in one-to-one correspondence with the steps displayed in the flow diagram of FIG. 8A. The frame structure of FIG. 8B may be used to carry the aforementioned feedback indication messages, efficient length training sequences, resource scheduling messages, and polling scheduling messages. Station 1 and station 2 feed back the beamforming report only after receiving the trigger frame when the access point instructs the feedback not to be performed immediately by using the frame sending sequence. Thereafter, the access point may continue to send further combined beamforming report poll frames and trigger frames to continue scheduling stations to feed back channel state information that has not been successfully fed back.

FIG. 8 shows a case where the AP sends a resource scheduling message after sending a feedback indication message and a high efficiency length training sequence to the STA when determining to request the STA to immediately feed back the channel state information, and a station , the feedback indication message, the efficient length training sequence, and the subsequent procedure of feeding back the channel state information after receiving the resource scheduling message. The AP determines the sequence of sending the feedback indication message, high efficiency length training sequence and resource scheduling message according to the information reported by the STA on whether the STA can immediately perform feedback. That is, the AP determines whether to request the STAs to feed back channel state information immediately. Therefore, when some stations cannot immediately feed back channel state information throughout the feedback process, the stations can still efficiently and flexibly transmit channel state information in a global sense in subsequent processes.

Method embodiment 9
9A and 9B are interaction diagrams for an access point scheduling multiple stations to transmit channel state information in accordance with yet another embodiment of the present invention. Figures 9A and 9B separately reflect this embodiment of the invention from two different perspectives. FIG. 9A reflects information or message exchanges between an access point and a station. FIG. 9B reflects frame exchanges between an access point and a station. The essence of FIG. 9B is the same as that of FIG. 9A since information or messages are carried in frames.

901. The AP sends a first resource scheduling message, a feedback indication message and a high efficiency length training sequence to the STAs.

The AP sends a first resource scheduling message, a feedback indication message and a high efficiency long training sequence to the STAs. A resource scheduling message or a feedback indication message may carry an indication message. The STAs herein may be STA1 and STA2 in FIG. 9 and may further include another STA not shown here. When the indication information indicates non-immediate feedback, the station does not immediately feed back the channel state information to ensure that the station can feed back the channel state information after a period of time when the feedback cannot be performed immediately. Sometimes.

902. STA returns an acknowledgment message to AP.

After receiving the indication information, the station determines that the feedback does not need to be performed immediately, and indicates that the first resource scheduling message, the feedback indication message, and the high efficiency length training sequence have been received. , may first feed back an acknowledgment message to the access point.

903. The AP sends a second resource scheduling message to the STA.

The access point may send a second resource scheduling message to the station after a period of time to schedule the station to feed back channel state information.

904. The STA returns channel state information to the AP.

After receiving the second resource scheduling message sent by the access point, the station sends some or all of the channel state information to the access point by using the communication resources indicated by the second resource scheduling message. can give feedback. In this embodiment of the invention, the example of station 1 and station 2 feeding back only part of the channel state information to the access point is used for illustration.

905. The AP sends a third resource scheduling message and a polling scheduling message to the STA.

When the station feeds back some of the channel state information to the access point in step 904, the access point may continue to schedule station 1 and station 2 to feed back channel state information that has not been successfully fed back. . Indeed, the access point may continue to schedule station 1 and station 2 here one or more times until the channel state information is fully fed back.

906. STAs return channel state information that has not been successfully fed back to the AP.

Station 1 and station 2 may continue to feed back channel state information to the access point that has not been successfully fed back.

In this embodiment of the invention, STA1 and STA2 may each be any station. Procedures performed by STA2 may be performed by STA1, and similarly procedures performed by STA1 may be performed by STA2. Merely for simplicity of explanation, STA1 and STA2 are used to distinguish stations of the present invention and are not intended to limit the protection scope of the present invention.

The steps displayed in the flow diagram of FIG. 9B are in one-to-one correspondence with the steps displayed in the flow diagram of FIG. 9A. The frame structure of FIG. 9B may be used to carry the aforementioned feedback indication messages, efficient length training sequences, resource scheduling messages, and polling scheduling messages. Station 1 and station 2 feed back acknowledgment frames when the access point commands both station 1 and station 2 not to immediately perform feedback. The access point may then continue to send trigger frames to schedule beamforming reports for the station. A beamforming report is a carrier of channel state information. Thereafter, the access point may continue to send further combined beamforming report poll frames and trigger frames to continue scheduling stations to feed back channel state information that has not been successfully fed back.

In this embodiment of the invention, channel state information that has not been successfully fed back may be channel state information that has not been fed back to the access point by the station, or has been fed back to the access point by the station, but It may be channel state information that is not correctly received by the access point. When an access point sends a combined BF report poll frame and a trigger frame, stations may feed back channel state information according to the Feedback Segment Retransmit Bitmap field. When the access point sends only the trigger frame, which indicates that the access point has not previously received any information fed back by the station, the station will channel the channel state information starting with the first segment of channel state information. State information may be sent to the access point.

FIG. 9 shows that the AP sends a feedback indication message, a high-efficiency length training sequence and a resource scheduling message to the STA when determining not to request the STA to immediately feed back the channel state information, and the STA sends a feedback indication message , a high-efficiency length training sequence, and a resource scheduling message, the STA feeds back an acknowledgment message to the AP as it instructs the AP not to perform feedback immediately, and then the AP sends the channel state information to When triggering STAs to feedback so that some stations cannot immediately feed back the channel state information throughout the feedback process, the stations can still efficiently feed back the channel state information in the overall sense in the subsequent process. We will mainly explain the case where it becomes possible to transmit in a flexible and flexible manner.

Method embodiment ten
10A, 10B, and 10C are interaction diagrams for an access point scheduling multiple stations to transmit channel state information in accordance with yet another embodiment of the present invention. Figures 10A and 10B and 10C separately reflect this embodiment of the invention from two different perspectives. FIG. 10A reflects information or message exchanges between an access point and a station. Figures 10B and 10C reflect frame exchanges between an access point and a station. The essence of FIGS. 10B and 10C is the same as that of FIG. 10A since information or messages are carried within frames.

1001. The AP sends a first resource scheduling message, a feedback indication message and a high efficiency length training sequence to the STAs.

The STAs herein may be STA1 and STA2 in FIG. 10 and may further include another STA not shown here. The access point sends a combined frame of NDPA, NDP, and trigger frames to multiple stations in broadcast form, and in order to schedule multiple stations to perform feedback, a field within the combined frame contains a first Resource scheduling messages, feedback indication messages, and efficient long training sequences may be added. The combination frame contains indication information used to dictate whether feedback should be performed immediately, for example the indication information may be carried in an NDPA or trigger frame.

1002. The STA returns channel state information or an acknowledgment message to the AP.

The station may receive the first resource scheduling message, the feedback indication message, and the high efficiency length training sequence sent by the access point, estimate the channel state information, and feed back the channel state information or the acknowledgment message to the access point. can. In general, a station may feed back channel state information to the access point when the access point commands the station to perform immediate feedback. When the access point instructs the station not to immediately perform feedback, the station instructs the station to indicate that the first resource scheduling message, the feedback indication message, and the high efficiency length training sequence have been received: An acknowledgment message may be fed back first.

The access point instruction information may instruct all stations to perform feedback immediately or not to perform feedback immediately, or instruct each station separately, i.e., to perform feedback immediately. Some stations may be instructed to not perform feedback immediately. Stations may feed back channel state information or acknowledgment messages to the access point as directed.

1003. The AP sends a second resource scheduling message and a polling scheduling message to the STAs.

After receiving the channel state information or the acknowledgment message sent by the station, the access point schedules the station to continue to feed back the channel state information until the channel state information is successfully fed back completely. A second resource scheduling message and a polling scheduling message may continue to be sent to the station.

1004. STAs return channel state information that has not been successfully fed back to the AP.

After receiving the second resource scheduling message and the polling scheduling message sent by the access point, the station continues to feed back to the access point the channel state information that has not been successfully fed back.

In this embodiment of the invention, STA1 and STA2 may each be any station. Procedures performed by STA2 may be performed by STA1, and similarly procedures performed by STA1 may be performed by STA2. Merely for simplicity of explanation, STA1 and STA2 are used to distinguish stations of the present invention and are not intended to limit the protection scope of the present invention.

The steps displayed in the flow diagram of FIG. 10B are in one-to-one correspondence with the steps displayed in the flow diagram of FIG. 10A. FIG. 10B shows the case where the access point commands all stations to perform feedback immediately. Station 1 and station 2 immediately feed back beamforming reports when the access point commands both station 1 and station 2 to perform feedback immediately. A beamforming report is a carrier of channel state information. The access point may continue to send further combined beamforming report poll frames and trigger frames to continue scheduling stations to feed back channel state information that has not been successfully fed back.

The steps displayed in the flow diagram of FIG. 10C are in one-to-one correspondence with the steps displayed in the flow diagram of FIG. 10A. FIG. 10C shows the case where the access point instructs some stations not to perform feedback immediately and some stations to perform feedback immediately. Station 1 may feed back an acknowledgment message when the access point instructs station 1 not to perform feedback immediately. Station 2 may feed back beamforming reports when the access point instructs station 2 to perform feedback immediately. A beamforming report is a carrier of channel state information. The access point may continue to send further combined beamforming report poll frames and trigger frames to continue scheduling stations to feed back channel state information that has not been successfully fed back.

FIG. 10 shows that the AP sends the feedback indication message, the high efficiency length training sequence and the resource scheduling message to the STA, and after receiving the feedback indication message, the high efficiency length training sequence and the resource scheduling message, the station sends the AP Channel state information or acknowledgment messages may be fed back according to the instructions, after which the AP triggers the STAs to continue feeding back channel state information that has not been successfully fed back, so that the STAs complete the feedback process. The STA may first feed back part of the channel state information and continue to feed back another part of the channel state information sent by the AP when it has insufficient resources to feed back the channel state information at We mainly describe the case where the STA may continue to feed back channel state information that has not been successfully fed back until the AP has completely received the STA's channel state information after receiving the resource scheduling message.

In this embodiment of the invention, the access point may separately instruct different stations to perform immediate feedback or not to perform immediate feedback, and the stations' procedures may be performed separately as instructed by the access point. and will not be described here one by one.

With reference to Figures 11 and 12, the following describes the specific structure of the frames used in embodiments of the present invention, combining beamforming report poll frames and trigger frames.

Embodiment 11
FIG. 11 is a structural diagram of a frame designed based on the trigger frame, combining the beamforming report pole frame and the trigger frame according to an embodiment of the present invention.

The combined frame in FIG. 11 can be designed based on the trigger frame and reuse the original trigger frame. The combined frame of FIG. 11 includes a frame control field, a beamforming report poll type indication field, a resource allocation reuse indication field, a station identifier field, a resource allocation information field, and a feedback segment retransmission bitmap field.

A frame control field may be used to indicate that the frame may be used for resource scheduling. The beamforming report poll type indication field may be used to indicate the type of frame, which may be used to poll for beamforming reports. Specifically, the Feedback Segment Retransmission Bitmap field may be used to indicate which segments should be transmitted. The resource allocation information field may contain resource scheduling messages. A Resource Allocation Reuse Indication field may be used to indicate whether the communication resources indicated by the frame are the same as those used in previous transmissions. The Resource Allocation Information field may not be required when the communication resources indicated by the frame are the same as those used in the previous transmission. Instead, communication resources used in previous transmissions are used directly for the transmission. Communication resources indicated by a resource scheduling message contained within a resource allocation information field in a frame may be used for transmission when the communication resources indicated by the frame are different from those used in previous transmissions. . The Station Identifier field is used to indicate stations that need to feed back channel state information to the access point.

Embodiment 12
FIG. 12 is a structural diagram of a frame designed based on a beamforming report pole frame, combining a beamforming report pole frame and a trigger frame according to another embodiment of the present invention.

The combined frame in FIG. 12 is designed based on the beamforming report pole frame and can reuse the original beamforming report pole frame. The combined frame of FIG. 12 includes a frame control field, a duration field, a receiver address field, a transmitter address field, a feedback segment retransmission bitmap field, an association address field, and each station's feedback segment retransmission bitmap field and checks. Contains a sequence field.

A frame control field may be used to indicate that the frame may be used to poll for beamforming reports. The associated address field can be used to indicate the identifier of the polled station. A Feedback Segment Retransmit Bitmap field within the Original Beamforming Report Poll Frame field may be used to indicate that a certain type of frame is a combined beamforming report poll frame and trigger frame. The resource allocation information field may contain resource scheduling messages. A Resource Allocation Reuse Indication field may be used to indicate whether the communication resources indicated by the frame are the same as those used in previous transmissions. The Resource Allocation Information field may not be required when the communication resources indicated by the frame are the same as those used in the previous transmission. Instead, communication resources used in previous transmissions are used directly for the transmission. Communication resources indicated by a resource scheduling message contained within a resource allocation information field in a frame may be used for transmission when the communication resources indicated by the frame are different from those used in previous transmissions. .

With reference to FIGS. 1B to 12, the foregoing details methods for transmitting channel state information according to embodiments of the present invention separately from the station and access point perspectives. 13 to 19, the following describes in detail access points and stations transmitting channel state information according to embodiments of the present invention.

Apparatus Embodiment 1
FIG. 13 is a schematic diagram of a station transmitting channel state information according to an embodiment of the present invention; The station of FIG. 13 comprises a first receiving unit 11 and a first transmitting unit 12. The first receiving unit 11 and the first transmitting unit 12 of FIG.

The first receiving unit 11 is configured to receive the feedback indication message, the high efficiency length training sequence and the first resource scheduling message sent by the access point AP. The Feedback Indication message is used to indicate at least two target stations STA that need to feed back channel state information to the AP. A high efficiency length training sequence is used to determine the first channel state information of the target STA. The first resource scheduling message is for indicating a first communication resource to be used by the target STA when the target STA performs feedback according to the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. used.

The first sending unit 12 sends an acknowledgment message to the AP by using the first communication resource when the feedback indication message received by the receiving unit is analyzed and the STA is determined to belong to the target STA. configured as An acknowledgment message is used to indicate that the feedback indication message, the high efficiency length training sequence and the first resource scheduling message have been received.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeding back an acknowledgment message to the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, the sending unit sends the feedback indication message, the high efficiency length training sequence and the first resource scheduling message when the target STA cannot immediately feedback the first channel state information. is specifically configured to send an acknowledgment message to the AP by using the first communication resource X interframe spaces XIFS after the is received.

Optionally, in an embodiment of the invention the station further comprises a first determination unit. The first determining unit is configured to determine the first channel state information according to the high efficiency length training sequence.

Optionally, in an embodiment of the invention the station further comprises a second receiving unit and a second transmitting unit. A second receiving unit is configured to receive a second resource scheduling message sent by the AP. A second resource scheduling message is used to indicate a second communication resource to be used by the STA when the STA feeds back the second channel state information. A second sending unit is configured to send second channel state information to the AP by using a second communication resource. The second channel state information is part or all of the first channel state information.

Optionally, in an embodiment of the invention the station further comprises a third receiving unit and a third transmitting unit. The third receiving unit is configured to receive the first polling scheduling message and the third resource scheduling message sent by the AP. The first polling scheduling message is used by the AP to request third channel state information from STAs. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A third resource scheduling message is used to indicate a third communication resource to be used by the STA when the STA feeds back third channel state information. A third sending unit is configured to send third channel state information to the AP by using a third communication resource.

Optionally, in an embodiment of the invention the first polling scheduling message and the third resource scheduling message are carried within the same data packet.

Optionally, in an embodiment of the present invention the first polling scheduling message and the third resource scheduling message are carried within the trigger frame of the same data packet. The trigger frame includes a first beamforming report poll type indication field and a first feedback segment retransmission bitmap field. The trigger frame further includes at least one of a first resource allocation information field or a first resource allocation reuse indication field. A third resource scheduling message is placed within the first resource allocation information field. The first polling scheduling message is placed in the first feedback segment retransmission bitmap field. The first resource allocation reuse indication field is used to indicate whether the third resource scheduling message is the same as the second resource scheduling message.

Optionally, in embodiments of the present invention, the trigger frame further includes an identifier field of the STA.

Optionally, in an embodiment of the present invention, the first polling scheduling message and the third resource scheduling message are carried within a beamforming report poll BF report poll frame of the same data packet. A BF report poll frame may include a receiver address field, a second feedback segment retransmission bitmap field, and a third feedback segment retransmission bitmap field. The BF report poll frame may further include at least one of a second resource allocation information field or a second resource allocation reuse indication field. A third resource scheduling message is placed in the second resource allocation information field. The first polling scheduling message is placed in the third feedback segment retransmission bitmap field. The indication information of the third resource scheduling message is placed in the second resource allocation reuse indication field.

Optionally, in an embodiment of the present invention, the BF report poll frame further includes the STA's identifier field.

Optionally, in embodiments of the present invention, the BF report poll frame is the poll frame used to trigger multi-user channel state information transmission, the receiver address field, the second feedback segment retransmission Indicated in any one of the following forms: bitmap field, or length of BF report poll frame.

Optionally, in an embodiment of the present invention, the station further comprises a second determining unit, the second determining unit buffering the first channel state information by the STA, the STA having limited capability The STA selects the first channel according to at least one of the conditions that the priority for the It is configured to determine that the status information cannot be fed back immediately.

A station transmitting channel state information according to this embodiment of the present invention may correspond to a station of the method for transmitting channel state information in an embodiment of the present invention. Moreover, the aforementioned and other operations and/or functions of the station units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. 1B. For the sake of brevity, the details are not described again here.

Apparatus embodiment 2
FIG. 14 is a schematic diagram of an access point transmitting channel state information according to another embodiment of the present invention;

The access point of FIG. 14 includes a first sending unit 21 and a first receiving unit 22. The access point of FIG.

The first sending unit 21 is configured to send the feedback indication message, the high efficiency length training sequence and the first resource scheduling message to the station STA. A feedback indication message is used to indicate at least two target STAs to which channel state information should be fed back. A high efficiency length training sequence is used to determine the first channel state information of the target STA. The first resource scheduling message indicates a first communication resource to be used by the target STA when the target STA performs feedback according to the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. used for

A first receiving unit 22 receives the acknowledgment message sent by the target STA by using the first communication resource indicated by the first resource scheduling message sent by the first sending unit. configured as The acknowledgment message is used to indicate that the target STA has received the feedback indication message, high efficiency length training sequence and first resource scheduling message.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeding back an acknowledgment message to the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, the first receiving unit, X inter-frame spaces XIFS after the target STA receives the feedback indication message, the high-efficiency length training sequence and the first resource scheduling message, Specifically configured to receive an acknowledgment message sent by using the first communication resource by the target STA, the target STA cannot immediately feed back channel state information.

Optionally, in an embodiment of the invention the access point further comprises a second sending unit and a second receiving unit. A second sending unit is configured to send a second resource scheduling message to the target STA. A second resource scheduling message is used to indicate a second communication resource to be used by the target STA when the target STA feeds back second channel state information. A second receiving unit is configured to receive second channel state information sent by the target STA by using a second communication resource. The second channel state information is part or all of the first channel state information.

Optionally, in an embodiment of the invention the access point further comprises a third sending unit and a third receiving unit. A third sending unit is configured to send the first polling scheduling message and the third resource scheduling message to the target STA. The first polling scheduling message is used to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A third resource scheduling message is used to indicate a third communication resource to be used by the target STA when the target STA feeds back third channel state information. A third receiving unit is configured to receive third channel state information sent by the target STA by using a third communication resource.

Optionally, in an embodiment of the invention the first polling scheduling message and the third resource scheduling message are carried within the same data packet.

Optionally, in an embodiment of the present invention the first polling scheduling message and the third resource scheduling message are carried within the trigger frame of the same data packet. The trigger frame includes a first beamforming report poll type indication field and a first feedback segment retransmission bitmap field. The trigger frame further includes at least one of a first resource allocation information field or a first resource allocation reuse indication field. A third resource scheduling message is placed within the first resource allocation information field. The first polling scheduling message is placed in the first feedback segment retransmission bitmap field. The first resource allocation reuse indication field is used to indicate whether the third resource scheduling message is the same as the second resource scheduling message.

Optionally, in embodiments of the present invention, the trigger frame further includes an identifier field of the STA.

Optionally, in an embodiment of the present invention, the first polling scheduling message and the third resource scheduling message are carried within a beamforming report poll BF report poll frame of the same data packet. The BF report poll frame includes a receiver address field, a second feedback segment retransmission bitmap field, and a third feedback segment retransmission bitmap field. The BF report poll frame further includes at least one of a second resource allocation information field or a second resource allocation reuse indication field. A third resource scheduling message is placed in the second resource allocation information field. The first polling scheduling message is placed in the third feedback segment retransmission bitmap field. The indication information of the third resource scheduling message is placed in the second resource allocation reuse indication field.

Optionally, in an embodiment of the present invention, the BF report poll frame further includes the STA's identifier field.

Optionally, in embodiments of the present invention, the BF report poll frame is the poll frame used to trigger multi-user channel state information transmission, the receiver address field, the second feedback segment retransmission Indicated in any one of the following forms: bitmap field, or length of BF report poll frame.

Optionally, in embodiments of the present invention, target STAs that cannot immediately feed back the first channel state information have the first channel state information buffered by the target STA, where the target STA has limited capabilities at least one of the following: the priority for the communication is less than the first threshold, or the size of the resource block within the first communication resource is less than the threshold.

An access point transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the access point units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Method embodiment 3
Figure 15 is a schematic diagram of a station transmitting channel state information according to yet another embodiment of the present invention.

The station of FIG. 15 includes a first receiving unit 31 and a first sending unit 32. The first receiving unit 31 and the first sending unit 32 are shown in FIG.

The first receiving unit 31 is configured to receive a first resource scheduling message, a first feedback indication message and a first high efficiency length training sequence sent by the access point AP according to the first indication information. be done. A first feedback indication message is used to indicate at least two target stations STA that need to feed back channel state information to the AP. The first resource scheduling message or the first feedback indication message includes first indication information. The first indication information is used to instruct the target STA whether to feed back channel state information immediately. The first high efficiency length training sequence is used to determine first channel state information for the target STA. The first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back the second channel state information or acknowledgment message. The second channel state information is part or all of the first channel state information. The acknowledgment message is used to indicate that the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message have been received.

The first sending unit 32 for determining first channel state information when the first feedback indication message received by the first receiving unit is analyzed and the STA is determined to belong to the target STA. , perform channel estimation according to the first high efficiency length training sequence received by the first receiving unit and select a first communication resource indicated by the first resource scheduling message received by the first receiving unit. It is configured to send second channel state information or an acknowledgment message to the AP by use.

In this embodiment of the present invention, the access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to the stations to schedule a plurality of stations to transmit channel state information; may instruct the station whether to perform immediate feedback, and the station may feed back channel state information or acknowledgment messages to the access point as instructed by the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, the first receiving unit receives the first message sent by the AP when the first instruction information instructs the STA not to immediately feed back the channel state information. Specifically configured to receive the first resource scheduling message X interframe spaces XIFS after receiving the feedback indication message and the first high efficiency length training sequence. The first feedback indication message includes first indication information. The first sending unit sends the first resource scheduling message, the first feedback indication message and the first resource scheduling message by using the first communication resource X interframe spaces XIFS after the first resource scheduling message is received. Specifically configured to send the second channel state information to the AP according to one high efficiency length training sequence.

Optionally, in an embodiment of the invention the station further comprises a second receiving unit and a second transmitting unit. The second receiving unit is configured to receive the first polling scheduling message and the second resource scheduling message sent by the AP. The first polling scheduling message is used to request third channel state information from STAs. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A second resource scheduling message is used to indicate a second communication resource to be used by the STA when the STA feeds back third channel state information. A second sending unit is configured to send third channel state information to the AP by using a second communication resource.

Optionally, in an embodiment of the present invention, the first sending unit receives the first resource scheduling message when the first indication information instructs the STA not to immediately feed back the channel state information and X interframe spaces XIFS afterward, by using the first communication resource to send an acknowledgment message to the AP.

Optionally, in an embodiment of the invention the station further comprises a third receiving unit and a third transmitting unit. A third receiving unit is configured to receive a third resource scheduling message sent by the AP. A third resource scheduling message is used to indicate a third communication resource to be used by the STA when the STA feeds back the fourth channel state information. The third sending unit is configured to send fourth channel state information by using a third communication resource, the fourth channel state information being part or all of the first channel state information. be.

Optionally, in an embodiment of the invention the station further comprises a fourth receiving unit and a fourth transmitting unit. A fourth receiving unit is configured to receive the second polling scheduling message and the fourth resource scheduling message sent by the AP. The second polling scheduling message is used to request fifth channel state information from the STA. The second polling scheduling message includes segment information of the fifth channel state information within the first channel state information. The fifth channel state information is part or all of the first channel state information from which the fourth channel state information is removed. A fourth resource scheduling message is used to indicate a fourth communication resource to be used by the target STA when the target STA feeds back the fifth channel state information. A fourth sending unit is configured to send fifth channel state information to the AP by using a fourth communication resource.

Optionally, in an embodiment of the present invention, the first sending unit sends the first resource scheduling message when the first instruction information instructs the STA to immediately feed back the channel state information. X inter-frame spaces XIFS from to send the second channel state information to the AP by using the first communication resource.

Optionally, in an embodiment of the invention the station further comprises a fifth receiving unit and a fifth transmitting unit. The fifth receiving unit is configured to receive the third polling scheduling message and the fifth resource scheduling message sent by the AP. A third polling scheduling message is used to request sixth channel state information from the STA. The third polling scheduling message includes segment information of the sixth channel state information within the first channel state information. The sixth channel state information is part or all of the first channel state information from which the second channel state information is removed. A fifth resource scheduling message is used to indicate a fifth communication resource to be used by the target STA when the target STA feeds back sixth channel state information. A fifth sending unit is configured to send sixth channel state information to the AP by using a fifth communication resource.

Optionally, in an embodiment of the present invention, the first indication information includes a field used to indicate the time for the STA to feed back the channel state information.

Optionally, in an embodiment of the present invention, the first indication information indicates a field used to instruct all STAs or separately instruct each STA whether to immediately feed back channel state information. include.

Optionally, in embodiments of the present invention, the first sending unit specifically sends the first resource scheduling message after sending the first feedback indication message and the first high efficiency length training sequence. When configured, the first indication information is used to indicate non-immediate feedback.

Optionally, in embodiments of the present invention, the size of the resource block within the first communication resource is less than the first threshold or the spatial stream used by the resource block within the first communication resource is less than a second threshold, the first indication information is used to indicate non-immediate feedback, or the size of the resource block within the first communication resource is less than the first The first indication is immediate feedback when greater than or equal to one threshold or the amount of spatial streams used by resource blocks within the first communication resource is greater than or equal to a second threshold. used to indicate

Optionally, in embodiments of the present invention, the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message are placed in different frames.

Optionally, in embodiments of the present invention, the first polling scheduling message and the second resource scheduling message are placed in the same data packet, or the second polling scheduling message and the fourth resource scheduling message are placed in the same data packet, or the third polling scheduling message and the fifth resource scheduling message are placed in the same data packet.

A station transmitting channel state information according to this embodiment of the invention may be adapted to a method of transmitting channel state information according to an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the station units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Apparatus embodiment 4
FIG. 16 is a schematic diagram of an access point transmitting channel state information in accordance with yet another embodiment of the present invention;

The access point of FIG. 16 includes a determining unit 41 , a first sending unit 42 and a first receiving unit 43 .

the determining unit 41 is configured to determine the first indication information, the first indication information being used to instruct the at least two target stations STA whether to immediately feedback the channel state information; At least two target stations STA need to feed back channel state information to the access point AP.

A first sending unit 42 to send the first resource scheduling message, the first feedback indication message and the first high efficiency length training sequence to the target STA according to the first indication information determined by the determining unit. configured to The first resource scheduling message or the first feedback indication message includes first indication information. A first feedback indication message is used to indicate at least two target stations STA that need to feed back channel state information to the AP. The first high efficiency length training sequence is used to determine first channel state information for the target STA. The first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back the second channel state information or acknowledgment message. The second channel state information is part or all of the first channel state information. The acknowledgment message is used to indicate that the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message have been received.

The first receiving unit 43 receives the first resource scheduling message sent by the first sending unit, the first feedback indication message and the first high efficiency length training message by using the first communication resource. It is configured to receive a second channel state information or an acknowledgment message sent by the target STA according to the sequence.

In this embodiment of the present invention, the access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to the stations to schedule a plurality of stations to transmit channel state information; may instruct the station whether to perform immediate feedback, and the station may feed back channel state information or acknowledgment messages to the access point as instructed by the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, the first sending unit sends the first feedback indication message and the It is specifically configured to send the first resource scheduling message X inter-frame spaces XIFS after sending the first high-efficiency-length training sequence. The first feedback indication message includes first indication information. The first receiving unit receives the first resource scheduling message, the first feedback indication message, by using the first communication resource after X inter-frame spaces XIFS after the first resource scheduling message is sent. and specifically configured to receive second channel state information sent by the STA according to the first high efficiency length training sequence.

Optionally, in an embodiment of the invention the access point further comprises a second sending unit and a second receiving unit. The second sending unit is configured to send the first polling scheduling message and the second resource scheduling message. The first polling scheduling message is used to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A second resource scheduling message is used to indicate a second communication resource to be used by the target STA when the target STA feeds back third channel state information. The second receiving unit is configured to receive third channel state information sent by the target STA by using a second communication resource.

Optionally, in an embodiment of the present invention, the first receiving unit is configured such that when the first indication information instructs the target STA not to immediately feed back the channel state information, the first resource scheduling message is X interframe spaces XIFS after being sent, by the target STA according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence, by using the first communication resource Specifically configured to receive sent acknowledgment messages.

Optionally, in an embodiment of the invention the access point further comprises a third sending unit and a third receiving unit. A third sending unit is configured to send a third resource scheduling message. A third resource scheduling message is used to indicate a third communication resource to be used by the target STA when the target STA feeds back the fourth channel state information. A third receiving unit is configured to receive fourth channel state information sent by the target STA by using a third communication resource, the fourth channel state information being transmitted on the first channel. Some or all of the state information.

Optionally, in an embodiment of the invention the access point further comprises a fourth sending unit and a fourth receiving unit. A fourth sending unit is configured to send the second polling scheduling message and the fourth resource scheduling message. The second polling scheduling message is used to request fifth channel state information from the target STA. The second polling scheduling message includes segment information of the fifth channel state information within the first channel state information. The fifth channel state information is part or all of the first channel state information from which the fourth channel state information is removed. A fourth resource scheduling message is used to indicate a fourth communication resource to be used by the target STA when the target STA feeds back the fifth channel state information. A fourth receiving unit is configured to receive fifth channel state information sent by the target STA by using a fourth communication resource.

Optionally, in an embodiment of the present invention, the first receiving unit sends the first resource scheduling message when the first indication information instructs the target STA to immediately feed back the channel state information. X inter frame spaces XIFS after being sent by the target STA according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence by using the first communication resource. is specifically configured to receive second channel state information from the

Optionally, in an embodiment of the invention the access point further comprises a fifth sending unit and a fifth receiving unit. A fifth sending unit is configured to send a third polling scheduling message and a fifth resource scheduling message. A third polling scheduling message is used to request sixth channel state information from the target STA. The third polling scheduling message includes segment information of the sixth channel state information within the first channel state information. The sixth channel state information is part or all of the first channel state information from which the second channel state information is removed. A fifth resource scheduling message is used to indicate a fifth communication resource to be used by the target STA when the target STA feeds back sixth channel state information. A fifth receiving unit is configured to receive sixth channel state information sent by the target STA by using a fifth communication resource.

Optionally, in an embodiment of the present invention, the first indication information includes a field used to indicate the time when the target STA feeds back the channel state information.

Optionally, in an embodiment of the present invention, the first indication information is used to instruct all target STAs or instruct each target STA separately whether to immediately feed back the channel state information Contains fields.

Optionally, in an embodiment of the present invention, when the first resource scheduling message is sent after the first feedback indication message and the first high efficiency length training sequence are sent, the first indication information is: Used to indicate non-immediate feedback.

Optionally, in embodiments of the present invention, the size of the resource block within the first communication resource is less than the first threshold or the spatial stream used by the resource block within the first communication resource is less than a second threshold, the first indication information is used to indicate non-immediate feedback, or the size of the resource block within the first communication resource is less than the first The first indication is immediate feedback when greater than or equal to one threshold or the amount of spatial streams used by resource blocks within the first communication resource is greater than or equal to a second threshold. used to indicate

Optionally, in embodiments of the present invention, the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message are placed in different frames.

Optionally, in embodiments of the present invention, the first polling scheduling message and the second resource scheduling message are placed in the same data packet, or the second polling scheduling message and the fourth resource scheduling message are placed in the same data packet, or the third polling scheduling message and the fifth resource scheduling message are placed in the same data packet.

An access point transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the access point units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Apparatus embodiment 5
Figure 17 is a schematic diagram of a station transmitting channel state information according to yet another embodiment of the present invention;

The station of FIG. 17 includes a first receiving unit 51 , a first sending unit 52 , a second receiving unit 53 and a second sending unit 54 .

The first receiving unit 51 is configured to receive the feedback indication message, the high efficiency length training sequence and the first resource scheduling message sent by the access point AP. The Feedback Indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP. A high efficiency length training sequence is used to determine the first channel state information of the target STA. A first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back second channel state information. The second channel state information is part of the first channel state information.

The first sending unit 52 performs the first channel state information to obtain the first channel state information when the feedback indication message received by the first receiving unit is analyzed and the STA is determined to belong to the target STA. and performing channel estimation according to the high efficiency length training sequence received by the receiving unit of the second receiving unit by using the first communication resource indicated by the first resource scheduling message received by the first receiving unit. of channel state information to the AP.

The second receiving unit 53 is configured to receive the first polling scheduling message and the second resource scheduling message sent by the AP. The first polling scheduling message is used by the AP to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A second resource scheduling message is used to indicate a second communication resource to be used by the target STA when the target STA feeds back third channel state information.

A second sending unit 54 is configured to send third channel state information to the AP by using a second communication resource indicated by a second resource scheduling message received by the second receiving unit. be done.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeds back channel state information to the access point, and the access point sends polling scheduling messages and resource scheduling messages to trigger stations to continue feeding back to the access point channel state information that has not been successfully fed back. You can keep sending more. In this manner, resource waste caused when feedback cannot be performed at one time due to insufficient resources can be avoided and channel state information transmission efficiency can be improved.

A station transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the station units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Apparatus embodiment 6
FIG. 18 is a schematic diagram of an access point transmitting channel state information in accordance with yet another embodiment of the present invention;

The access point of FIG. 18 includes a first sending unit 61, a first receiving unit 62, a second sending unit 63 and a second receiving unit 64. The access point of FIG.

The first sending unit 61 is configured to send the feedback indication message, the high efficiency length training sequence and the first resource scheduling message to the station STA. The Feedback Indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP. A high efficiency length training sequence is used to determine the first channel state information of the target STA. A first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back second channel state information. The second channel state information is part of the first channel state information.

The first receiving unit 62 receives the second channel state information sent by the target STA by using the first communication resource indicated by the first resource scheduling message sent by the first sending unit. configured to receive

The second sending unit 63 is configured to send the first polling scheduling message and the second resource scheduling message to the target STA. The first polling scheduling message is used to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A second resource scheduling message is used to indicate a second communication resource to be used by the target STA when the target STA feeds back third channel state information.

A second receiving unit 64 receives the third channel state information sent by the target STA by using a second communication resource indicated by a second resource scheduling message sent by the second sending unit. configured to receive

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeds back channel state information to the access point, and the access point sends polling scheduling messages and resource scheduling messages to trigger stations to continue feeding back to the access point channel state information that has not been successfully fed back. You can keep sending more. In this manner, resource waste caused when feedback cannot be performed at one time due to insufficient resources can be avoided and channel state information transmission efficiency can be improved.

An access point transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the access point units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Apparatus Embodiment 7
FIG. 19 is a schematic diagram of an apparatus for transmitting channel state information according to an embodiment of the present invention;

Apparatus 70 of FIG. 19 includes transmitter 71 , receiver 72 , processor 73 and memory 74 . Processor 73 may be configured to control the operation of device 70 and to process signals. Memory 74 , which may include read-only memory and random-access memory, provides instructions and data to processor 73 . Transmitter 71 and receiver 72 may be coupled to bus system 75 . All components of device 70 are coupled together through the use of bus system 75, which includes power, control, and status signal buses in addition to data buses. However, for clarity of explanation, the various buses are marked as bus system 75 in the figure.

The aforementioned methods disclosed in embodiments of the present invention may be applied to or performed by processor 73 . In an implementation process, the steps of the methods described above may be performed by using instructions in the form of hardware integrated logic or software within the processor 73 . Processor 73 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component and is an embodiment of the present invention. may implement or execute the methods, steps, and logic block diagrams disclosed in. A general-purpose processor may be a microprocessor, or any conventional processor, or the like. The steps of the methods disclosed with reference to the embodiments of the present invention may be performed directly by a hardware processor or by using a combination of hardware and software modules within the processor. A software module may reside in any conventional storage medium, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. The storage media are located within the memory 74 . Processor 73 reads the information in memory 74 and in combination with the processor hardware completes the steps of the method described above.

Specifically, when apparatus 70 is a station, receiver 72 may be configured to receive feedback indication messages, high efficiency length training sequences, and first resource scheduling messages sent by access point AP. The Feedback Indication message is used to indicate at least two target stations STA that need to feed back channel state information to the AP. A high efficiency length training sequence is used to determine the first channel state information of the target STA. The first resource scheduling message is for indicating a first communication resource to be used by the target STA when the target STA performs feedback according to the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. used.

The transmitter 71 is configured to send an acknowledgment message to the AP by using the first communication resource when the STA is determined to belong to the target STA according to the received feedback indication message. An acknowledgment message is used to indicate that the feedback indication message, the high efficiency length training sequence and the first resource scheduling message have been received.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeding back an acknowledgment message to the access point. In this manner, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, the transmitter 71 sends the feedback indication message, the high efficiency length training sequence and the first resource scheduling message when the target STA cannot immediately feedback the first channel state information. It may be configured to send an acknowledgment message to the AP by using the first communication resource X interframe spaces XIFS after the message is received.

Optionally, in embodiments of the present invention, processor 73 may be configured to determine the first channel state information according to the high efficiency length training sequence.

Optionally, in embodiments of the present invention, receiver 72 is configured to receive a second resource scheduling message sent by the AP. A second resource scheduling message is used to indicate a second communication resource to be used by the STA when the STA feeds back the second channel state information. Transmitter 71 may be configured to send the second channel state information to the AP by using a second communication resource. The second channel state information is part or all of the first channel state information.

Optionally, in embodiments of the present invention, receiver 72 may be configured to receive the first polling scheduling message and the third resource scheduling message sent by the AP. The first polling scheduling message is used by the AP to request third channel state information from STAs. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A third resource scheduling message is used to indicate a third communication resource to be used by the STA when the STA feeds back third channel state information. Transmitter 71 may be configured to send the third channel state information to the AP by using a third communication resource.

Optionally, in an embodiment of the invention the first polling scheduling message and the third resource scheduling message are carried within the same data packet.

Optionally, in an embodiment of the present invention the first polling scheduling message and the third resource scheduling message are carried within the trigger frame of the same data packet. The trigger frame includes a first beamforming report poll type indication field and a first feedback segment retransmission bitmap field. The trigger frame further includes at least one of a first resource allocation information field or a first resource allocation reuse indication field. A third resource scheduling message is placed within the first resource allocation information field. The first polling scheduling message is placed in the first feedback segment retransmission bitmap field. The first resource allocation reuse indication field is used to indicate whether the third resource scheduling message is the same as the second resource scheduling message.

Optionally, in embodiments of the present invention, the trigger frame further includes an identifier field of the STA.

Optionally, in an embodiment of the present invention, the first polling scheduling message and the third resource scheduling message are carried within a beamforming report poll BF report poll frame of the same data packet. A BF report poll frame may include a receiver address field, a second feedback segment retransmission bitmap field, and a third feedback segment retransmission bitmap field. The BF report poll frame may further include at least one of a second resource allocation information field or a second resource allocation reuse indication field. A third resource scheduling message is placed in the second resource allocation information field. The first polling scheduling message is placed in the third feedback segment retransmission bitmap field. The indication information of the third resource scheduling message is placed in the second resource allocation reuse indication field.

Optionally, in an embodiment of the present invention, the BF report poll frame further includes the STA's identifier field.

Optionally, in embodiments of the present invention, the BF report poll frame is the poll frame used to trigger multi-user channel state information transmission, the receiver address field, the second feedback segment retransmission Indicated in any one of the following forms: bitmap field, or length of BF report poll frame.

Optionally, in an embodiment of the present invention, the station further comprises a processor, the processor having a first priority for buffering the first channel state information by the STA, the STA having limited capability; or the size of the resource block in the first communication resource is less than the threshold, the STA immediately feeds back the first channel state information It is configured to determine that it is not possible.

A station transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the station units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. 1B. For the sake of brevity, the details are not described again here.

Apparatus Embodiment 8
Specifically, when device 70 is an access point, transmitter 71 may be configured to send a feedback indication message, a high efficiency length training sequence and a first resource scheduling message to station STA. A feedback indication message is used to indicate at least two target STAs to which channel state information should be fed back. A high efficiency length training sequence is used to determine the first channel state information of the target STA. The first resource scheduling message indicates a first communication resource to be used by the target STA when the target STA performs feedback according to the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. used for

Receiver 72 may be configured to receive the acknowledgment message sent by the target STA by using the first communication resource indicated by the sent first resource scheduling message. The acknowledgment message is used to indicate that the target STA has received the feedback indication message, high efficiency length training sequence and first resource scheduling message.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeding back an acknowledgment message to the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, the receiver 72 sends the target STA X interframe spaces XIFS after the target STA receives the feedback indication message, the high efficiency length training sequence, and the first resource scheduling message. configured to receive an acknowledgment message sent by using the first communication resource, the target STA cannot immediately feed back channel state information.

Optionally, in embodiments of the present invention, transmitter 71 may be configured to send a second resource scheduling message to target STAs. A second resource scheduling message is used to indicate a second communication resource to be used by the target STA when the target STA feeds back second channel state information. Receiver 72 may be configured to receive second channel state information sent by the target STA by using a second communication resource. The second channel state information is part or all of the first channel state information.

Optionally, in embodiments of the present invention, the transmitter 71 may be configured to send the first polling scheduling message and the third resource scheduling message to the target STA. The first polling scheduling message is used to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A third resource scheduling message is used to indicate a third communication resource to be used by the target STA when the target STA feeds back third channel state information. Receiver 72 may be configured to receive the third channel state information sent by the target STA by using a third communication resource.

Optionally, in an embodiment of the invention the first polling scheduling message and the third resource scheduling message are carried within the same data packet. Optionally, in an embodiment of the present invention the first polling scheduling message and the third resource scheduling message are carried within the trigger frame of the same data packet. The trigger frame includes a first beamforming report poll type indication field and a first feedback segment retransmission bitmap field. The trigger frame further includes at least one of a first resource allocation information field or a first resource allocation reuse indication field. A third resource scheduling message is placed within the first resource allocation information field. The first polling scheduling message is placed in the first feedback segment retransmission bitmap field. The first resource allocation reuse indication field is used to indicate whether the third resource scheduling message is the same as the second resource scheduling message.

Optionally, in embodiments of the present invention, the trigger frame further includes an identifier field of the STA.

Optionally, in an embodiment of the present invention, the first polling scheduling message and the third resource scheduling message are carried within a beamforming report poll BF report poll frame of the same data packet. The BF report poll frame includes a receiver address field, a second feedback segment retransmission bitmap field, and a third feedback segment retransmission bitmap field. The BF report poll frame further includes at least one of a second resource allocation information field or a second resource allocation reuse indication field. A third resource scheduling message is placed in the second resource allocation information field. The first polling scheduling message is placed in the third feedback segment retransmission bitmap field. The indication information of the third resource scheduling message is placed in the second resource allocation reuse indication field.

Optionally, in an embodiment of the present invention, the BF report poll frame further includes the STA's identifier field.

Optionally, in embodiments of the present invention, the BF report poll frame is the poll frame used to trigger multi-user channel state information transmission, the receiver address field, the second feedback segment retransmission Indicated in any one of the following forms: bitmap field, or length of BF report poll frame.

Optionally, in embodiments of the present invention, target STAs that cannot immediately feed back the first channel state information have the first channel state information buffered by the target STA, where the target STA has limited capabilities at least one of the following: the priority for the communication is less than the first threshold, or the size of the resource block within the first communication resource is less than the threshold.

An access point transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the access point units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Apparatus embodiment 9
Specifically, when the device 70 is a station, the receiver 72 receives the first resource scheduling message, the first feedback indication message sent by the access point AP, and the first feedback indication message according to the first indication information. It may be configured to receive high efficiency long training sequences. A first feedback indication message is used to indicate at least two target stations STA that need to feed back channel state information to the AP. The first resource scheduling message or the first feedback indication message includes first indication information. The first indication information is used to instruct the target STA whether to feed back channel state information immediately. The first high efficiency length training sequence is used to determine first channel state information for the target STA. The first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back the second channel state information or acknowledgment message. The second channel state information is part or all of the first channel state information. The acknowledgment message is used to indicate that the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message have been received.

The transmitter 71 receives the first high-efficiency length training message to determine the first channel state information when the STA is determined to belong to the target STA according to the received first feedback indication message. It may be configured to perform channel estimation according to the sequence and send a second channel state information or an acknowledgment message to the AP by using the first communication resource indicated by the received first resource scheduling message. .

In this embodiment of the present invention, the access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to the stations to schedule a plurality of stations to transmit channel state information; may instruct the station whether to perform immediate feedback, and the station may feed back channel state information or acknowledgment messages to the access point as instructed by the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in embodiments of the present invention, the receiver 72 responds to the first feedback indication sent by the AP when the first indication information instructs the STAs not to immediately feed back channel state information. It may be configured to receive the first resource scheduling message X interframe spaces XIFS after receiving the message and the first high efficiency length training sequence. The first feedback indication message includes first indication information. Transmitter 71 receives the first resource scheduling message, the first feedback indication message, and the first resource scheduling message by using the first communication resource X interframe spaces XIFS after the first resource scheduling message is received. It may be configured to send the second channel state information to the AP according to one high efficiency length training sequence.

Optionally, in embodiments of the present invention, the receiver 72 may be configured to receive the first polling scheduling message and the second resource scheduling message sent by the AP. The first polling scheduling message is used to request third channel state information from STAs. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A second resource scheduling message is used to indicate a second communication resource to be used by the STA when the STA feeds back third channel state information. Transmitter 71 may be configured to send the third channel state information to the AP by using a second communication resource.

Optionally, in an embodiment of the present invention, the transmitter 71 receives the first resource scheduling message when the first indication information instructs the STAs not to immediately feed back the channel state information. X interframe spaces XIFS from to send an acknowledgment message to the AP by using the first communication resource.

Optionally, in embodiments of the present invention, receiver 72 may be configured to receive a third resource scheduling message sent by the AP. A third resource scheduling message is used to indicate a third communication resource to be used by the STA when the STA feeds back the fourth channel state information. Transmitter 71 may be configured to send fourth channel state information by using a third communication resource, where the fourth channel state information is part or all of the first channel state information. .

Optionally, in embodiments of the present invention, receiver 72 may be configured to receive the second polling scheduling message and the fourth resource scheduling message sent by the AP. The second polling scheduling message is used to request fifth channel state information from the STA. The second polling scheduling message includes segment information of the fifth channel state information within the first channel state information. The fifth channel state information is part or all of the first channel state information from which the fourth channel state information is removed. A fourth resource scheduling message is used to indicate a fourth communication resource to be used by the target STA when the target STA feeds back the fifth channel state information. Transmitter 71 may be configured to send fifth channel state information to the AP by using a fourth communication resource.

Optionally, in an embodiment of the present invention, the transmitter 71 sends the first resource scheduling message and then X After inter-frame space XIFS, it may be configured to send the second channel state information to the AP by using the first communication resource.

Optionally, in embodiments of the present invention, receiver 72 may be configured to receive a third polling scheduling message and a fifth resource scheduling message sent by the AP. A third polling scheduling message is used to request sixth channel state information from the STA. The third polling scheduling message includes segment information of the sixth channel state information within the first channel state information. The sixth channel state information is part or all of the first channel state information from which the second channel state information is removed. A fifth resource scheduling message is used to indicate a fifth communication resource to be used by the target STA when the target STA feeds back sixth channel state information. Transmitter 71 may be configured to send the sixth channel state information to the AP by using a fifth communication resource.

Optionally, in an embodiment of the present invention, the first indication information includes a field used to indicate the time for the STA to feed back the channel state information.

Optionally, in an embodiment of the present invention, the first indication information indicates a field used to instruct all STAs or separately instruct each STA whether to immediately feed back channel state information. include.

Optionally, in embodiments of the present invention, when the transmitter 71 may be configured to send the first resource scheduling message after sending the first feedback indication message and the first high efficiency length training sequence, The first indication information is used to indicate non-immediate feedback.

Optionally, in embodiments of the present invention, the size of the resource block within the first communication resource is less than the first threshold or the spatial stream used by the resource block within the first communication resource is less than a second threshold, the first indication information is used to indicate non-immediate feedback, or the size of the resource block within the first communication resource is less than the first The first indication is immediate feedback when greater than or equal to one threshold or the amount of spatial streams used by resource blocks within the first communication resource is greater than or equal to a second threshold. used to indicate

Optionally, in embodiments of the present invention, the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message are placed in different frames.

Optionally, in embodiments of the present invention, the first polling scheduling message and the second resource scheduling message are placed in the same data packet, or the second polling scheduling message and the fourth resource scheduling message are placed in the same data packet, or the third polling scheduling message and the fifth resource scheduling message are placed in the same data packet.

A station transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the station units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Device Embodiment 10
Specifically, when the device 70 is an access point, the processor 73 may be configured to determine the first indication information, the first indication information whether to immediately feed back the channel state information. It is used to command at least two target stations STA, and at least two target stations STA need to feed back channel state information to the access point AP.

The transmitter 71 may be configured to send the first resource scheduling message, the first feedback indication message and the first high efficiency length training sequence to the target STA according to the determined first indication information. The first resource scheduling message or the first feedback indication message includes first indication information. A first feedback indication message is used to indicate at least two target stations STA that need to feed back channel state information to the AP. The first high efficiency length training sequence is used to determine first channel state information for the target STA. The first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back the second channel state information or acknowledgment message. The second channel state information is part or all of the first channel state information. The acknowledgment message is used to indicate that the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message have been received.

A receiver 72 receives a second signal sent by the target STA according to the first resource scheduling message sent by using the first communication resource, the first feedback indication message, and the first high efficiency length training sequence. channel state information or acknowledgment messages.

In this embodiment of the present invention, the access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to the stations to schedule a plurality of stations to transmit channel state information; may instruct the station whether to perform immediate feedback, and the station may feed back channel state information or acknowledgment messages to the access point as instructed by the access point. In this way, resource waste caused when some stations cannot perform feedback immediately can be avoided and channel state information transmission efficiency can be improved.

Optionally, in an embodiment of the present invention, the transmitter 71 sends the first feedback indication message and the first high efficiency length training sequence X inter frame spaces XIFS after sending the first resource scheduling message. The first feedback indication message includes first indication information. Receiver 72 receives the first resource scheduling message, the first feedback indication message, and the first resource scheduling message by using the first communication resource X interframe spaces XIFS after the first resource scheduling message is sent. It may be configured to receive second channel state information sent by the STA according to one high efficiency length training sequence.

Optionally, in embodiments of the present invention, transmitter 71 may be configured to send a first polling scheduling message and a second resource scheduling message. The first polling scheduling message is used to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A second resource scheduling message is used to indicate a second communication resource to be used by the target STA when the target STA feeds back third channel state information. Receiver 72 may be configured to receive the third channel state information sent by the target STA by using a second communication resource.

Optionally, in an embodiment of the present invention, the receiver 72 receives the first resource scheduling message when the first indication information instructs the target STA not to immediately feed back channel state information. after X interframe spaces XIFS later, by using the first communication resource, according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence, sent by the target STA It can be configured to receive an acknowledgment message.

Optionally, in embodiments of the present invention transmitter 71 may be configured to send a third resource scheduling message. A third resource scheduling message is used to indicate a third communication resource to be used by the target STA when the target STA feeds back the fourth channel state information. Receiver 72 may be configured to receive fourth channel state information sent by the target STA by using a third communication resource, wherein the fourth channel state information corresponds to the first channel state. Some or all of the information.

Optionally, in embodiments of the present invention transmitter 71 may be configured to send a second polling scheduling message and a fourth resource scheduling message. The second polling scheduling message is used to request fifth channel state information from the target STA. The second polling scheduling message includes segment information of the fifth channel state information within the first channel state information. The fifth channel state information is part or all of the first channel state information from which the fourth channel state information is removed. A fourth resource scheduling message is used to indicate a fourth communication resource to be used by the target STA when the target STA feeds back the fifth channel state information. Receiver 72 may be configured to receive the fifth channel state information sent by the target STA by using a fourth communication resource.

Optionally, in an embodiment of the present invention, the receiver 72 receives the first resource scheduling message when the first indication information instructs the target STA to immediately feed back the channel state information. After X interframe spaces XIFS from, the first sent by the target STA according to the first resource scheduling message, the first feedback indication message, and the first high efficiency length training sequence by using the first communication resource. 2 channel state information.

Optionally, in embodiments of the present invention transmitter 71 may be configured to send a third polling scheduling message and a fifth resource scheduling message. A third polling scheduling message is used to request sixth channel state information from the target STA. The third polling scheduling message includes segment information of the sixth channel state information within the first channel state information. The sixth channel state information is part or all of the first channel state information from which the second channel state information is removed. A fifth resource scheduling message is used to indicate a fifth communication resource to be used by the target STA when the target STA feeds back sixth channel state information. Receiver 72 may be configured to receive the sixth channel state information sent by the target STA by using a fifth communication resource.

Optionally, in an embodiment of the present invention, the first indication information includes a field used to indicate the time when the target STA feeds back the channel state information.

Optionally, in an embodiment of the present invention, the first indication information is used to instruct all target STAs or instruct each target STA separately whether to immediately feed back the channel state information Contains fields.

Optionally, in an embodiment of the present invention, when the first resource scheduling message is sent after the first feedback indication message and the first high efficiency length training sequence are sent, the first indication information is: Used to indicate non-immediate feedback.

Optionally, in embodiments of the present invention, the size of the resource block within the first communication resource is less than the first threshold or the spatial stream used by the resource block within the first communication resource is less than a second threshold, the first indication information is used to indicate non-immediate feedback, or the size of the resource block within the first communication resource is less than the first The first indication is immediate feedback when greater than or equal to one threshold or the amount of spatial streams used by resource blocks within the first communication resource is greater than or equal to a second threshold. used to indicate

Optionally, in embodiments of the present invention, the first feedback indication message, the first high efficiency length training sequence and the first resource scheduling message are placed in different frames.

Optionally, in embodiments of the present invention, the first polling scheduling message and the second resource scheduling message are placed in the same data packet, or the second polling scheduling message and the fourth resource scheduling message are placed in the same data packet, or the third polling scheduling message and the fifth resource scheduling message are placed in the same data packet.

An access point transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the access point units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Apparatus Embodiment 11
Specifically, when apparatus 70 is a station, receiver 72 may be configured to receive feedback indication messages, high efficiency length training sequences, and first resource scheduling messages sent by access point AP. . The Feedback Indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP. A high efficiency length training sequence is used to determine the first channel state information of the target STA. A first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back second channel state information. The second channel state information is part of the first channel state information.

The transmitter 71 performs channel estimation according to the received high efficiency length training sequence to obtain first channel state information when the STA is determined to belong to the target STA according to the received feedback indication message. and send the second channel state information to the AP by using the first communication resource indicated by the received first resource scheduling message.

Receiver 72 is configured to receive the first polling scheduling message and the second resource scheduling message sent by the AP. The first polling scheduling message is used by the AP to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A second resource scheduling message is used to indicate a second communication resource to be used by the target STA when the target STA feeds back third channel state information.

Transmitter 71 may be configured to send the third channel state information to the AP by using a second communication resource indicated by the received second resource scheduling message.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , feeds back channel state information to the access point, and the access point sends polling scheduling messages and resource scheduling messages to trigger stations to continue feeding back to the access point channel state information that has not been successfully fed back. You can keep sending more. In this manner, resource waste caused when feedback cannot be performed at one time due to insufficient resources can be avoided and channel state information transmission efficiency can be improved.

A station transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the station units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

Apparatus embodiment 12
Specifically, when device 70 is an access point, transmitter 71 may be configured to send a feedback indication message, a high efficiency length training sequence and a first resource scheduling message to station STA. The Feedback Indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP. A high efficiency length training sequence is used to determine the first channel state information of the target STA. A first resource scheduling message is used to indicate a first communication resource to be used by the target STA when the target STA feeds back second channel state information. The second channel state information is part of the first channel state information.

Receiver 72 may be configured to receive the second channel state information sent by the target STA by using the first communication resource indicated by the sent first resource scheduling message.

Transmitter 71 may be configured to send the first polling scheduling message and the second resource scheduling message to the target STA. The first polling scheduling message is used to request third channel state information from the target STA. The first polling scheduling message includes segment information of the third channel state information within the first channel state information. The third channel state information is part or all of the first channel state information from which the second channel state information is removed. A second resource scheduling message is used to indicate a second communication resource to be used by the target STA when the target STA feeds back third channel state information.

Receiver 72 may be configured to receive the third channel state information sent by the target STA by using the second communication resource indicated by the second resource scheduling message.

In this embodiment of the present invention, an access point sends a resource scheduling message, a feedback indication message, and a high efficiency length training sequence to a station to schedule a plurality of stations to transmit channel state information, and the station: , channel state information is fed back to the access point, and the access point sends polling scheduling messages and resource scheduling messages to trigger stations to continue feeding back channel state information to the access point that has not been successfully fed back. You can keep sending more. In this manner, resource waste caused when feedback cannot be performed at one time due to insufficient resources can be avoided and channel state information transmission efficiency can be improved.

An access point transmitting channel state information according to this embodiment of the invention may correspond to the method of transmitting channel state information in an embodiment of the invention. Moreover, the aforementioned and other operations and/or functions of the access point units/modules may be used separately to implement the corresponding steps of the method illustrated in FIG. For the sake of brevity, the details are not described again here.

It should be understood that the sequence numbers of the processes described above do not imply the sequence of execution in various embodiments of the present invention. The execution sequence of the processes should be determined according to the function and internal logic of the processes and should not be construed as a limitation on the implementation processes of the embodiments of the present invention.

Furthermore, the technical terms and English translations mentioned above impose no limitations on the features corresponding to the technical terms and English translations, and should be subject to the function of the features.

Those skilled in the art may know that method steps and units can be implemented by electronic hardware, computer software, or a combination thereof, in combination with the examples described in the embodiments disclosed herein. To clearly describe the interchangeability between hardware and software, the foregoing generally described the steps and components of each embodiment according to function. Whether the functions are performed by hardware or software depends on the particular application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functionality for each particular application, but implementation should not be considered beyond the scope of the invention.

It should be appreciated that in the embodiments provided herein, the disclosed systems, devices, and methods may be implemented in other ways. For example, the described apparatus embodiments are merely examples. For example, the unit division is simply a logical function division, and there may be other divisions within the actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not performed. Further, any displayed or discussed mutual coupling, direct coupling, or communication connection may be implemented through the use of any interface. Indirect couplings or communicative connections between devices or units may be implemented electronically, mechanically, or otherwise.

units described as separate parts may or may not be physically separate; parts denoted as units may or may not be physical units; It may be located in one location or distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

The methods or steps described in the embodiments disclosed herein may be implemented by hardware, software programs executed by a processor, or a combination thereof. The software program may be stored in random access memory (RAM), memory, read only memory (ROM), electrically erasable programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other memory known in the art. It may reside in any other known form of storage medium.

The present invention will be described in detail in combination with embodiments with reference to the accompanying drawings, but the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the essence of the invention, and the modifications or substitutions should be included in the scope of the invention.

Claims (16)

A method of transmitting channel state information, comprising:
Transmitting by the device a Null Data Packet Announcement (NDPA) frame, said NDPA frame carrying a feedback indication message indicating two or more target stations (STAs) to which channel state information should be fed back. a step of sending;
transmitting a null data packet (NDP) by the device, the NDP carrying a high efficiency length training sequence used to determine channel state information by the two or more target STAs; a step;
transmitting, by the device, a trigger frame after transmitting the NDP, the trigger frame being transmitted when at least one STA of the two or more target STAs feeds back the channel state information; carrying or transmitting a first resource scheduling message indicating a first communication resource to be used by at least one STA of the two or more target STAs;
receiving, by the device, the channel state information from at least one STA of the two or more target STAs via the first communication resource after transmitting the trigger frame;
with
The method, wherein the trigger frame includes a type field indicating that the type of the trigger frame is a beamforming report poll. after receiving the channel state information from at least one STA of the two or more target STAs;
transmitting by the device an additional trigger frame, the additional trigger frame indicating that at least one STA of the two or more target STAs receives the channel state information previously not successfully fed back; transmitting a second resource scheduling message indicating a second communication resource to be used by at least one STA of the two or more target STAs when feeding back the
2. The method of claim 1, further comprising: 2. The method of claim 1, wherein there is an inter-frame space between said NDP and said trigger frame. 2. The method of claim 1, wherein the trigger frame includes a feedback segment retransmission bitmap field in each station region, the feedback segment retransmission bitmap field in each station region indicating a requested feedback segment. . A method of transmitting channel state information, comprising:
receiving a null data packet announcement (NDPA) frame by a station (STA), said NDPA frame having a feedback indication indicating two or more target stations (STAs) to which channel state information should be fed back; conveying and receiving a message;
receiving a null data packet (NDP) by the STA, the NDP carrying a high efficiency length training sequence used to determine channel state information by the two or more target STAs; a step;
receiving, by the STA, a trigger frame after receiving the NDP, the trigger frame being received when at least one STA of the two or more target STAs feeds back the channel state information; conveying receiving a first resource scheduling message indicating a first communication resource to be used by at least one STA of the two or more target STAs;
determining by the STA that the STA belongs to at least one STA of the two or more target STAs;
determining, by the STA, the channel state information corresponding to the STA based on the high efficiency length training sequence;
transmitting, by the STA, the channel state information corresponding to the STA over the first communication resource after receiving the trigger frame;
with
The method, wherein the trigger frame includes a type field indicating that the type of the trigger frame is a beamforming report poll. After transmitting the channel state information corresponding to the STA,
receiving an additional trigger frame by the STA, wherein the additional trigger frame indicates that at least one STA of the two or more target STAs receives the channel state information previously not successfully fed back; carrying, receiving a second resource scheduling message indicating a second communication resource to be used by at least one STA of the two or more target STAs when feeding back a
6. The method of claim 5, further comprising: 6. The method of claim 5, wherein there is an inter-frame space between said NDP and said trigger frame. 6. The method of claim 5, wherein the trigger frame includes a feedback segment retransmission bitmap field in each station region, the feedback segment retransmission bitmap field in each station region indicating the requested feedback segment. . A device for transmitting channel state information, comprising:
transmitting a Null Data Packet Announcement (NDPA) frame, the NDPA frame carrying a feedback indication message indicating two or more target stations (STAs) to which channel state information should be fed back;
transmitting a null data packet (NDP), the NDP carrying a high efficiency length training sequence used by the two or more target STAs to determine channel state information;
After transmitting the NDP, a trigger frame is transmitted, and the trigger frame is transmitted to at least one of the two or more target STAs when at least one STA of the two or more target STAs feeds back the channel state information. carrying a first resource scheduling message that indicates a first communication resource to be used by the STAs;
a transmitter configured to
a receiver configured to receive the channel state information from at least one of the two or more target STAs via the first communication resource after the trigger frame is transmitted;
with
The device, wherein the trigger frame includes a type field indicating that the type of the trigger frame is a beamforming report poll. The transmitter transmits additional trigger frames, wherein at least one STA of the two or more target STAs feeds back the channel state information that has not previously been successfully fed back. carrying a second resource scheduling message indicating a second communication resource to be used by at least one STA of the two or more target STAs when doing so;
10. The apparatus of claim 9, further configured to: 10. The device of claim 9, wherein there is an inter-frame space between said NDP and said trigger frame. 10. The apparatus of claim 9, wherein the trigger frame includes a feedback segment retransmission bitmap field in each station region, the feedback segment retransmission bitmap field in each station region indicating a requested feedback segment. . A station (STA) for transmitting channel state information,
receiving a Null Data Packet Announcement (NDPA) frame, the NDPA frame carrying a feedback indication message indicating two or more target stations (STAs) to which channel state information should be fed back;
receiving a null data packet (NDP), the NDP carrying a high efficiency length training sequence used by the two or more target STAs to determine channel state information;
receiving a trigger frame after receiving the NDP, the trigger frame being sent to at least one of the two or more target STAs when at least one STA of the two or more target STAs feeds back the channel state information; a receiver configured to carry a first resource scheduling message indicating first communication resources to be used by STAs;
determining that the STA belongs to at least one STA of the two or more target STAs;
a processor configured to determine the channel state information corresponding to the STA based on the high efficiency length training sequence;
a transmitter configured to transmit the channel state information corresponding to the STA over the first communication resource after the trigger frame is received;
with
The STA , wherein the trigger frame includes a type field indicating that the type of the trigger frame is a beamforming report poll. The receiver receives an additional trigger frame, wherein the additional trigger frame feeds back the channel state information previously not successfully fed back to at least one STA of the two or more target STAs. 14. The method of claim 13, configured to carry a second resource scheduling message indicating a second communication resource to be used by at least one STAs of the two or more target STAs when performing a second resource scheduling message. of STAs . 14. The STA of claim 13, wherein there is an inter-frame space between said NDP and said trigger frame. 14. The STA of claim 13, wherein the trigger frame includes a Feedback Segment Retransmission Bitmap field in each station region, the Feedback Segment Retransmission Bitmap field in each station region indicating a requested feedback segment. .

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