WO2012028030A1 - Method for multi-user acknowledgement feedback, and station for feeding back acknowledgment - Google Patents

Abstract

The present invention discloses a method for multi-user acknowledgement (ACK) feedback and a station (STA) for feeding back an ACK. The method is used for STAs related to an Access Point (AP) in a Basic Service Set (BSS) to reply with ACKs, and includes: after dividing the STAs related to the AP into Multi-User Multiple Input Multiple Output (MU-MIMO) groups, assigning a group identification (ID) and creating group information for each MU-MIMO group respectively, the AP notifies the STAs of the group information; after receiving a Request To Send (RTS) frame and an MU-MIMO data frame, according to the group information, the RTS, the Group ID domain and the information indicated by the station data flow information indication N_STS domain contained in VHT-SIG-A in the physical frame header of the MU-MIMO data frame, the Media Access Control (MAC) address information in the physical frame load of the MU-MIMO data frame and the MU-MIMO group information with the Group ID indicated by the Group ID domain, the STA determines the STA needing to reply with an ACK, and replies with the ACK in an appointed order.

Description

 Method for multi-user feedback confirmation message and site for feedback confirmation message

Technical field

 The present invention relates to a technique for feeding back an acknowledgement message (ACK), and more particularly to a method for multi-user feedback confirmation message, and a site (STA, Station) for feeding back a confirmation message.

Background technique

 Wireless Local Area Networks (WLAN) is a network system that uses wireless communication technology to interconnect computer devices to form a network that can communicate with each other and share resources. The essential feature of WLAN is that it no longer uses a communication cable to connect the computer to the network, but to connect wirelessly, which makes the construction of the network and the movement of the terminal more flexible. IEEE802.i l is one of the mainstream technologies of wireless LAN. This protocol mainly specifies the physical layer (PHY) and media access control (MAC) layer specifications.

 With the development of mobile communication technology and the increasing demand for wireless networks, the physical layer specification has been developing towards higher and higher speeds, going through 802.11 to 802.11b to 802.1 la/g, then 802.11η, and finally To the development of 802.11ac. The actual physical technology has also evolved from direct sequence spread spectrum technology to orthogonal frequency division multiplexing (OFDM) technology, and introduced multi-antenna technology in IEEE802.1 In to introduce large bandwidth in IEEE802.1 lac. And multi-user-multiple input multiple output (MU-MIMO).

 However, the prior art has not provided a technical solution for how multiple users participating in multi-user (MU) transmissions reply to an acknowledgement message (ACK).

Summary of the invention

 The technical problem to be solved by the present invention is to provide a method for multi-user feedback confirmation message, which overcomes the shortcomings of the prior art that the multiple users participating in the MU transmission reply to the acknowledgment message (ACK).

In order to solve the above technical problem, the present invention provides a method for multi-user feedback confirmation message, which is used for a site (STA) associated with an access point (AP) in a basic service set (BSS). The acknowledgement message (ACK); the AP performs multi-user-multiple input multiple output (MU-MIMO) packets on the STAs associated with it, assigns a packet number to each MU-MIMO packet, and constructs packet information separately, and notifies the STA of the packet information. ; The method includes:

After receiving the MU-MIMO data frame, the STA indicates the information indicated by the packet number (Group ID) field and the site data flow information indication (N _STS ) field in the physical frame header of the data frame, physics. The media access control (MAC) address information in the frame payload, and the MU-MIMO packet information under the packet number indicated by the Group ID field, determine the STA that replies to the ACK, and reply the ACK in the agreed order.

The packet number indicated by the Group ID field in the MU-MIMO data frame is the same as the packet number of the MU-MIMO packet where the STA itself is located, and the corresponding position in the N _STS domain is not zero, the physical frame. The bearer carries the same MAC address as the STA's own MAC address, and the STA replies to the ACK;

 The corresponding location is the same as the relative location of the STA itself in the MU-MIMO packet.

According to the agreed order, the STA that first responds to the ACK is the STA corresponding to the MAC address carried in the request transmission frame (RTS) of the MU-MIMO transmission; the MU-MIMO data frame carries the bearer The remaining STAs identified by the MAC address reply to the ACK in the order of relative positions in the MU-MIMO packet.

 The order of the agreement includes a relative position sequence of STAs identified by the MAC address carried in the MU-MIMO data frame payload in the MU-MIMO packet.

 The STA indicates that the packet number indicated by the Group ID field in the MU-MIMO data frame is different from the packet number of the MU-MIMO packet in which the STA itself is located, and the STA does not reply to the ACK.

The packet number indicated by the Group ID field in the MU-MIMO data frame is the same as the packet number of the MU-MIMO packet where the STA itself is located, and the corresponding location indication in the N _STS domain is zero, and the STA does not reply. The ACK;

The corresponding location is the same as the relative location of the STA itself in the MU-MIMO packet. The group number and the number indicated by the Group ID field in the MU-MIMO data frame The MU-MIMO packet in which the STA is located has the same packet number, and the corresponding location indication in the N _STS domain is not zero. If the MAC carried in the physical frame payload is different from the MAC address of the STA itself, the STA does not reply. ACK;

 The corresponding location is the same as the relative location of the STA in the MU-MIMO packet. The step of assigning a group number to each MU-MIMO packet includes:

Another technical problem to be solved by the present invention is to provide a site (STA) for feeding back a confirmation message, which overcomes the drawbacks of the prior art that the multiple users participating in the MU transmission reply to the acknowledgment message (ACK).

 In order to solve the above technical problem, the present invention provides a site (STA) for feeding back a confirmation message, which is applied to reply an acknowledgement message (ACK) to an access point (AP) in a basic service set (BSS), which is combined with another one. Or more than one STA is associated with the AP; the STA includes a receiving module and a feedback module, where:

 The receiving module is configured to: receive a multi-user-multiple input multiple output (MU-MIMO) data frame; the feedback module is configured to: according to the physical frame header of the MU-MIMO data frame

The group ID field and site data stream information included in the VHT-SIG-A indicate the information indicated by the (N _STS ) field, the media access control (MAC ) address information in the physical frame payload, and the Group ID field. MU-MIMO packet information under the indicated packet number, determining STAs replying to the ACK, and replying to the ACK in an agreed order;

 The AP performs MU-MIMO grouping on the STAs associated with it, for each

After the MU-MIMO packet specifies the packet number and constructs the packet information separately, the packet information is notified to the STA.

 The feedback module is configured to reply the ACK in the order of the STAs in the MU-MIMO packet.

 The feedback module is configured to: carry according to the MU-MIMO data frame load

The relative locations of the STAs identified by the MAC address in the MU-MIMO packet sequentially reply to the ACK message.

The present invention provides a method for multi-user feedback confirmation message for a basic service set The site (STA) associated with the access point (AP) in (BSS) replies with an acknowledgment message (ACK), which includes:

The AP performs a multi-user-multiple input multiple output (MU-MIMO) packet on the STA associated with it, assigns a packet number to each MU-MIMO packet, and separately constructs the packet information, and notifies the STA to the STA; After requesting a transmission frame (RTS) and a MU-MIMO data frame, according to the packet information, the RTS, and a packet number (Group ID) included in the physical frame header of the MU-MIMO data frame, VHT-SIG-A The domain and site data flow information indicates information indicated by the (N _STS ) field, media access control (MAC ) address information in the payload of the physical frame of the MU-MIMO data frame, and the packet number indicated by the Group ID field The underlying MU-MIMO packet information determines the STAs that need to reply to the ACK and replies to the ACK in an agreed order.

The step of determining the STA that needs to reply to the ACK includes: the packet number indicated by the Group ID field is the same as the packet number of the MU-MIMO packet where the STA itself is located, and the corresponding location in the N _STS domain is not zero. The payload of the physical frame carries the same MAC address as the MAC address of the STA itself, and the STA needs to reply to the ACK;

 The corresponding location is the same as the relative location of the STA itself in the MU-MIMO packet. The order of the agreement includes: an order of the STAs in the MU-MIMO packet.

 The order of the agreement includes: the STA that first responds to the ACK is the STA corresponding to the MAC address carried in the RTS; the remaining STAs identified by the MAC address carried in the MU-MIMO data frame payload are in accordance with the MU. - The relative position in the MIMO packet sequentially replies to the ACK.

 The order of the agreement includes: a relative position sequence of STAs identified by the MAC address carried in the MU-MIMO data frame payload in the MU-MIMO packet.

 The step of determining the STA that needs to reply to the ACK includes: the packet number indicated by the Group ID field is different from the packet number of the MU-MIMO packet in which the STA itself is located, and the STA does not need to reply to the ACK.

The step of determining the STA that needs to reply to the ACK includes: the packet number indicated by the Group ID field is the same as the packet number of the MU-MIMO packet where the STA itself is located, and the corresponding location indication in the N _STS domain is zero, The STA does not need to reply to the ACK; The corresponding location is the same as the relative location of the STA itself in the MU-MIMO packet. The step of determining the STA that needs to reply to the ACK includes: the packet number indicated by the Group ID field is the same as the packet number of the MU-MIMO packet where the STA itself is located, and the corresponding location indication in the N _STS domain is not zero. If the MAC carried in the payload of the physical frame is different from the MAC address of the STA itself, the STA does not need to reply to the ACK.

 The corresponding location is the same as the relative location of the STA in the MU-MIMO packet. Wherein, the step of assigning a group number to each MU-MIMO packet includes: different MU-MIMO packets have the same or different packet numbers.

 The present invention provides a site (STA) for feeding back a confirmation message for replying an acknowledgment message (ACK) to two (or two) groups of access points (APs) in a basic service set (BSS). After the packet number is specified for each MU-MIMO packet and the packet information is separately configured, the packet information is notified to the STA, where the STA includes a first receiving module, a second receiving module, and a feedback module, where:

 The first receiving module is configured to: receive a request sending frame (RTS) sent by the AP, and group information, and learn, according to the grouping information, a packet number of the MU-MIMO packet where the STA itself is located, and the STA itself is in the MU-MIMO packet. Relative position information;

 The second receiving module is configured to: receive a multi-user-multiple input multiple output (MU-MIMO) data frame;

The feedback module is configured to: according to the obtained packet number of the MU-MIMO packet in which the STA itself is located, and the relative location information of the STA itself in the MU-MIMO packet, the RTS, the physics of the MU-MIMO data frame The packet number (Group ID) field and the site data stream information indication (N _STS ) field included in the VHT-SIG-A in the frame header, the media access control (MAC) address information in the payload of the physical frame, and the location The MU-MIMO packet information under the packet number indicated by the Group ID field determines the STAs that need to reply to the ACK, and replies to the ACK in an agreed order.

Wherein: the feedback module is further configured to: reply the ACK in the order of the STAs in the MU-MIMO packet. The feedback module is further configured to: reply the ACK according to the relative position of the STAs identified by the MAC address carried in the MU-MIMO data frame payload in the MU-MIMO packet.

The feedback module is configured to determine, in the following manner, the STA that needs to reply to the ACK: the packet number indicated by the Group ID field is the same as the packet number of the MU-MIMO packet where the STA itself is located, and the corresponding in the N _STS domain If the location of the physical frame is not the same as the MAC address of the STA itself, the feedback module confirms that the STA needs to reply to the ACK;

 The corresponding location is the same as the relative location of the STA itself in the MU-MIMO packet. With the technical solution of the invention, it is ensured that the STAs in the MU-MIMO packet can reply ACKs in an orderly manner without additional signaling, and collisions are avoided between each other, and STAs without data transmission in the group need not transmit. ACK also saves signaling overhead. It is also possible to ensure that the services of the primary STAs are given priority protection.

 Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by the structure particularly pointed in the appended claims.

BRIEF abstract

 The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. 1 is a schematic flowchart of a method for multi-user feedback ACK according to Embodiment 1 of the present invention; and FIG. 2 is a schematic diagram of a composition of a STA for feedback ACK according to Embodiment 2 of the present invention.

Preferred embodiment of the invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, in which the present invention can be applied to the technical problems, and the implementation of the technical effects can be fully understood and implemented. All are within the scope of protection of the present invention. Additionally, the steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer-executable instructions, and, although the logical order is illustrated in the flowchart, in some cases, may be different The steps shown or described are performed in the order herein.

 Embodiment 1 Multi-user feedback ACK method

 This embodiment is used for a station (STA, Station) associated with an access point (AP, Access Point) in a basic service set (BSS) to reply a confirmation message. As shown in FIG. 1, the embodiment mainly includes the following steps:

 Step S110: In a BSS, the AP performs all possible MU-MIMO packets on the STAs associated with the STA according to one factor or a combination of several factors, such as channel state information, data traffic, and data service type of each STA. Specify a group ID (Group ID) for each MU-MIM0 packet and construct packet information separately;

MU-MIMO packets may also have different packet numbers;

 Step S120, the AP notifies the STA of the group information by using signaling;

 The packet information may be carried in a management frame and sent to the STA.

 Step SI 30, after receiving the packet information, the STA learns the packet number of the MU-MIMO packet in which it is located, and also obtains relative position information in the MU-MIMO packet.

Step S140, after receiving the MU-MIMO data frame, the STA indicates the group number (Group ID) field and the site data flow information indication (N _STS ) field included in the physical frame header of the data frame according to the VHT-SIG-A. The information, the media access control (MAC) address information in the physical frame payload, and the MU-MIMO packet information under the packet number indicated by the Group ID field, determine the STAs that need to reply to the ACK, and reply ACKs in the agreed order.

 The STA also receives a request to send (RTS, Request To Send), where the RTS includes the MAC address information of both the sender and the receiver. The RTS is a control frame used to protect the transmission of MU-MIMO data frames.

Wherein, if the group number indicated by the Group ID field in the MU-MIMO data frame is the same as the group number of the MU-MIMO packet in which the STA itself is located, the corresponding position indication of the N _STS field is not zero. The physical frame payload carries the same MAC address as the STA's own MAC address. After the data detection is completed, the STA needs to reply to the ACK. The corresponding location is the same as the STA itself's relative position in the MU-MIMO packet.

The STA that first responds to the ACK is the STA corresponding to the MAC address carried in the RTS of the MU-MIMO transmission, and the STA may be referred to as a primary site.

 If the packet number indicated by the Group ID field in the MU-MIMO data frame is different from the packet number of the MU-MIMO packet in which the STA itself is located, the STA does not need to further parse the data, and does not need to reply to the ACK.

If the packet number indicated by the Group ID field in the MU-MIMO data frame is the same as the packet number of the MU-MIMO packet in which the STA itself is located, and the corresponding location indication in the N _STS domain is zero, the STA does not need to further analyze. Data, there is no need to reply to ACK; the above corresponding position is the same as the relative position of the STA itself in the MU-MIMO packet.

If the packet number indicated by the Group ID field in the MU-MIMO data frame is the same as the packet number of the MU-MIMO packet where the STA itself is located, the corresponding location indication in the N _STS domain is not zero, and the physical frame load is carried. The MAC does not need to reply to the ACK when the MAC address of the STA is different from the STA's own MAC address; the corresponding location is the same as the relative position of the STA in the MU-MIMO packet.

Practical application of the first embodiment

 There are 1 AP and 6 STAs in the network, and 6 STAs are represented as the first station (STA-1), the second station (STA-2), the third station (STA-3), and the fourth station (STA-). 4), the fifth station (STA-5), the sixth station (STA-6). Each MU-MIMO packet has a maximum of 4 STAs, and a MU-MIMO packet of less than 4 STAs is still considered to be composed of 4 STAs, and an insufficient portion can be considered to have a virtual STA.

The AP divides the six STAs into multiple MU-MIMO packets according to the channel state information of each STA, and notifies the corresponding STAs of the packet information. Assuming that the group number is sufficient, each group number indicates only one MU-MIMO packet, and one of the packets is (STA-2, STA-6, STA-4, STA-1). Group number Group ID=2.

 The AP issues the MU-MIMO packet information, the information includes the group number Group ID=2, and the identifiers of the four STAs arranged in the order of the parentheses above. In the actual application, the identifier is represented by the MAC address of each STA.

 Each STA receives the MU-MIMO packet information and detects it, but only STA-1, STA-2,

STA-4 and STA-6 will use this MU-MIMO packet information as useful information because there is a STA identifier matching the one in the received information. The four STAs have useful information from this MU-MIMO packet information in two ways:

 1) a MU-MIMO packet belonging to the group number Group ID=2;

 2) The relative position of itself in this MU-MIMO packet.

 For example, the information obtained by STA-1 from the MU-MIMO packet information includes: STA-1 belongs to the MU-MIMO packet with the group number Group ID=2, and STA-1 is in the fourth position in this packet.

 In this application, if the STA identified by the MAC address carried in the RTS frame has data transmission in the current MU-MIMO transmission, the STA needs to reply the ACK first, and the remaining STAs identified by the MAC address carried in the data frame payload are The relative position of the group in which the packet is located is replied in order.

 In the current MU-MIMO transmission of the actual application, among the four STAs, STA-1, STA-2 and STA-6 have one data stream transmission, and STA-4 has no data transmission.

 After the RTS/Clear To Send (CTS) exchange, the MU-MIMO packet transmission is performed, wherein the MAC address in the MAC address field in the RTS frame payload sent by the AP is the MAC address of the STA-6, The physical frame header of the RTS frame contains the group number Group ID=2 information.

 Using the method of this practical application, the decision process of each STA replying to ACK is as follows:

 (1) for STA-1

STA-1 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-1 to resolve the N _STS domain includes: 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is zero, that is, the data of the STA that does not include the third location in the MU-MIMO packet is transmitted this time;

 4) The number of data streams of the STA at the fourth position in the MU-MIMO packet is 1.

 Further analyzing the MAC address information in the frame payload and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-1 occupies the fourth position in the MU-MIMO packet. According to the received RTS frame, it can be known that the MAC address in the RTS frame payload is the MAC address of STA-6, and the data of STA-6 is transmitted this time;

 Combining the above information, according to the method of the present application, since one STA of the relative position has no data transmission, that is, the STA at the third position has no data transmission, STA-1 replies to the third ACK.

 (2) For STA-2

The STA-2 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-2 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is zero, that is, the data of the STA that does not include the third location in the MU-MIMO packet is transmitted this time;

 4) The number of data streams of the STA at the fourth position in the MU-MIMO packet is 1.

 Further parsing the MAC address information in the frame payload and discovering that its own MAC address is included, so this transmission has its own data;

According to the foregoing, STA-2 occupies the first position in the MU-MIMO packet; according to the received RTS frame, it can be known that the MAC address in the RTS frame payload is the STA-6 MAC address. Address, and this transmission has STA-6 data;

 Based on the above information, STA-2 replies ACK 2 in accordance with the method of this practical application. (3) For STA-3 and STA-5

 The STA-3 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and knows that the frame does not belong to the MU-MIMO packet itself, and does not need to reply to the ACK.

 STAs that have the same processing as STA3 also have STA5.

 (4) For STA-4

The STA-4 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-4 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is zero, that is, the data of the STA that does not include the third location in the MU-MIMO packet is transmitted this time;

 4) The number of data streams of the STA at the fourth position in the MU-MIMO packet is 1.

 According to the foregoing, STA-4 occupies the third position in the MU-MIMO packet, so the current transmission does not have its own data, and there is no need to reply to the ACK.

 (5) For STA-6

The STA-6 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-6 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

3) The number of data streams of the STA in the third position in the MU-MIMO packet is zero, that is, the current transmission does not include the data of the STA in the third position in the MU-MIMO packet; 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1.

 Further analyzing the MAC address information in the MU-MIMO data frame payload, and discovering that its own MAC address is included, so the current transmission has its own data;

 According to the foregoing, STA-6 occupies the second position in the MU-MIMO packet; according to the received RTS frame, it can be known that the MAC address in the RTS frame payload is its own MAC address;

 Based on the above information, STA-6 replies with ACK first according to the method of this practical application. The order in which the ACK is finally returned:

 The first reply ACK STA is STA-6;

 The second reply ACK STA is STA-2;

 The STA of the third reply ACK is STA-1.

Practical application 2 of the first embodiment

 There are 1 AP and 6 STAs in the network, and 6 STAs are represented as the first station (STA-1), the second station (STA-2), the third station (STA-3), and the fourth station (STA-). 4), the fifth station (STA-5), the sixth station (STA-6). Each MU-MIMO packet has a maximum of 4 STAs, and a MU-MIMO packet of less than 4 STAs is still considered to be composed of 4 STAs, and an insufficient portion can be considered to have a virtual STA.

 The AP divides the six STAs into multiple MU-MIMO packets according to the channel state information of each STA, and notifies the corresponding STAs to the group information, assuming that the group number is sufficient, and each group number indicates only one MU-MIMO packet. One of the packets is (STA-2, STA-6, STA-4, STA-1), and the group number is Group ID=2.

 The AP issues the MU-MIMO packet information, the information includes the group number Group ID=2, and the identifiers of the four STAs arranged in the order of the parentheses above. In the actual application, the identifier is represented by the MAC address of each STA.

Each STA receives the MU-MIMO packet information and detects it, but only STA-1, STA-2, STA-4, and STA-6 will use this MU-MIMO packet information as useful information because it is received. The information has STA identifiers that match itself. The useful information obtained by the four STAs from the MU-MIMO packet information has two aspects:

 1) a MU-MIMO packet belonging to the group number Group ID=2;

 2) The relative position of itself in this MU-MIMO packet.

 For example, the information obtained by STA-1 from the MU-MIMO packet information includes: STA-1 belongs to the MU-MIMO packet with the group number Group ID=2, and STA-1 is in the fourth position in this packet.

 In this application, the STA identified by the MAC address carried in the RTS frame needs to reply to the ACK first. However, if the STA has no data transmission in the current MU-MIMO transmission, the STA does not need to reply to the ACK. The STAs identified by the MAC address carried in the data frame payload reply ACK in the order of the relative positions of the packets.

 In the current MU-MIMO transmission of the actual application, among the four STAs, only STA-1 and STA-2 have one data stream transmission, and STA-4 and STA-6 have no data transmission.

 After the RTS/CTS frame exchange is performed, the MU-MIMO data packet transmission is performed, wherein the MAC address in the MAC address field in the RTS frame payload sent by the AP is the MAC address of the STA-6, and is included in the physical frame header of the RTS frame. Group number Group ID=2 information.

 Using the method of this practical application, the decision process of each STA replying to ACK is as follows:

 (1) for STA-1

STA-1 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-1 to resolve the N _STS domain includes:

 1) The number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) The number of data streams of the STA in the second location in the MU-MIMO packet is zero, that is, the current transmission does not include the data of the STA in the second location in the MU-MIMO packet;

3) The number of data streams of the STA in the third position in the MU-MIMO packet is zero, that is, the current transmission does not include the data of the STA in the third position in the MU-MIMO packet; 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1; further analyzing the MAC address information in the frame payload, and discovering that its own MAC address is included, so the current transmission has its own data; According to the foregoing, STA-1 occupies the fourth position in the MU-MIMO packet. According to the received RTS frame, it can be known that the MAC address in the RTS frame payload is the MAC address of STA-6, and there is no STA in this transmission. -6 data,

 Based on the above information, STA-1 replies with ACK 2 in accordance with the method of this practical application.

 (2) For STA-2

The STA-2 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-2 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) The number of data streams of the STA in the second location in the MU-MIMO packet is zero, that is, the current transmission does not include the data of the STA in the second location in the MU-MIMO packet;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is zero, that is, the data of the STA that does not include the third location in the MU-MIMO packet is transmitted this time;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further parsing the MAC address information in the frame payload and discovering that its own MAC address is included, so this transmission has its own data;

 According to the foregoing, the STA-2 occupies the first position in the MU-MIMO packet. According to the received RTS frame, the MAC address in the RTS frame payload is the MAC address of the STA-6, and there is no STA in the current transmission. -6 data;

 Based on the above information, STA-2 replies to the first ACK according to the method of this practical application.

 (3) For STA-3 and STA-5

The STA-3 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame does not belong to the MU-MIMO packet itself, and does not need to reply to the ACK. STAs that have the same processing as STA3 also have STA5.

 (4) For STA-4

The STA-4 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-6 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) The number of data streams of the STA in the second location in the MU-MIMO packet is zero, that is, the current transmission does not include the data of the STA in the second location in the MU-MIMO packet;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is zero, that is, the data of the STA that does not include the third location in the MU-MIMO packet is transmitted this time;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 According to the foregoing, STA-4 occupies the third position in the MU-MIMO packet, and the current transmission does not have its own data, and there is no need to reply to the ACK.

 (5) For STA-6

The STA-6 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-6 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) The number of data streams of the STA in the second location in the MU-MIMO packet is zero, that is, the current transmission does not include the data of the STA in the second location in the MU-MIMO packet;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is zero, that is, the data of the STA that does not include the third location in the MU-MIMO packet is transmitted this time;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

According to the foregoing, STA-6 occupies the second position in the MU-MIMO packet, so this transmission does not have its own data; although the MAC address in the RTS frame payload is itself MAC address, but according to the method of this practical application, STA-6 does not need to reply ACK.

 The order in which the ACK is finally returned:

 The first reply ACK STA is STA-2;

 The second reply ACK STA is STA-1.

Practical application three of the first embodiment

 Assume that there are 1 AP and 6 STAs in the network, and 6 STAs are represented as the first station (STA-1), the second station (STA-2), the third station (STA-3), and the fourth station (STA). -4), fifth site (STA-5), sixth site (STA-6). Each MU-MIMO packet has a maximum of 4 STAs, and a MU-MIMO packet of less than 4 STAs is still considered to be composed of 4 STAs, and an insufficient portion can be considered to have a virtual STA.

 The AP divides the six STAs into multiple MU-MIMO packets according to the channel state information of each STA, and notifies the corresponding STAs to the group information, assuming that the group number is sufficient, and each group number indicates only one MU-MIMO packet. One of the packets is (STA-2, STA-6, STA-4, STA-1), and the group number is Group ID=2.

 The AP issues the MU-MIMO packet information, the information includes the group number Group ID=2, and the identifiers of the four STAs arranged in the order of the parentheses above. In the actual application, the identifier is represented by the MAC address of each STA.

 Each STA receives the MU-MIMO packet information and detects it, but only STA-1, STA-2, STA-4, STA-6 will use this MU-MIMO packet information as useful information, because in the received information. There are STA identifiers that match themselves. The four STAs have useful information from this MU-MIMO packet information in two ways:

 1) a MU-MIMO packet belonging to the group number Group ID=2;

 2) The relative position of itself in this MU-MIMO packet.

For example, the information obtained by the STA-1 from the MU-MIMO packet information includes: STA-1 belongs to the MU-MIMO packet of the group number Group ID=2, and STA-1 is in the fourth position in this packet. The relative positional order of the STAs identified by the MAC address carried in the MU-MIMO packet. That is, the STAs identified by the MAC addresses carried in the data frame payload reply ACKs in the order of the relative positions of the packets.

 Current MU-MIMO transmission in this application, in 4 STAs, STA-1, STA-2,

Both STA-4 and STA-6 have a data stream transmission.

 After the RTS/CTS frame exchange is performed, the MU-MIMO data packet transmission is performed, wherein the MAC address in the MAC address field in the RTS frame payload sent by the AP is the MAC address of the STA-6, and is included in the physical frame header of the RTS frame. Group number Group ID=2 information.

 Using the method of this practical application, the decision process of each STA replying to ACK is as follows:

 (1) for STA-1

STA-1 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-1 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further analyzing the MAC address information in the frame payload and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-1 occupies the fourth position in the MU-MIMO packet. . Based on the above information, STA-1 responds with ACK 4 in accordance with the method of this practical application. (2) For STA-2

The STA-2 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes According to the foregoing, the information obtained by the STA-2 to parse the N _STS domain includes:

1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further analyzing the MAC address information in the frame load and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-2 occupies the first position in the MU-MIMO packet. . Based on the above information, STA-2 replies to the first ACK according to the method of this practical application.

 (3) For STA-3 and STA-5

 The STA-3 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and knows that the frame does not belong to its own MU-MIMO packet, and does not need to reply to the ACK.

 STAs that have the same processing as STA3 also have STA5.

 (4) For STA-4

The STA-4 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-4 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

Further analyzing the MAC address information in the frame payload and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-4 occupies the third position in the MU-MIMO packet. . Based on the above information, STA-4 replies to the third ACK according to the method of the actual application. (5) For STA-6

The STA-6 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-6 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further analyzing the MAC address information in the frame load and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-6 occupies the second position in the MU-MIMO packet. Combining the above information, according to the method of the actual application, the STA-6 replies with the second ACK. The order in which the ACK is finally returned:

 The first reply ACK STA is STA-2;

 The second reply ACK STA is STA-6;

 The third reply ACK STA is STA-4;

 The fourth reply ACK STA is STA-1.

Practical application of the first embodiment

 Assume that there are 1 AP and 9 STAs in the network, and 9 STAs are represented as the first station (STA-1), the second station (STA-2), the third station (STA-3), and the fourth station (STA). -4), fifth station (STA-5), sixth station (STA-6), seventh station (STA-7), eighth station (STA-8), ninth station (STA-9). Each MU-MIMO packet has a maximum of 4 STAs, and a MU-MIMO packet of less than 4 STAs is still considered to be composed of 4 STAs, and an insufficient portion can be considered to have a virtual STA.

The AP divides the nine STAs into multiple MU-MIMO packets according to the channel state information of each STA. And all the group information is notified to the STA, assuming that the group number is not enough, each group number can indicate multiple MU-MIMO packets, but there is such a constraint that if the same STA appears in multiple MUs indicated by the same group number In the MIMO packet, then the relative position of this STA in the group among these packets is fixed.

 In the actual application, the group number Group ID=2 indicates two MU-MIMO packets, and the two sub-components are 'STA-2, STA-6, STA-4, STA-1), (STA-2, STA) -6, STA-4, STA-9).

 The AP issues MU-MIMO packet information, and the MU-MIMO packet information includes the group number. The order in which the packet information is distributed is also in the order written above.

 In this application, the STA identified by the MAC address carried in the RTS frame is this time.

If there is data transmission in the MU-MIMO transmission, the STA needs to reply ACK first, and the remaining STAs identified by the MAC address carried in the data frame payload reply ACK according to the relative position of the group.

 In the current MU-MIMO transmission of the actual application, among the four STAs, STA-9, STA-6, STA-4, and STA-1 all have one data stream transmission, that is, the current transmission is for the group number Group ID= The second group under 2.

 After the RTS/CTS frame exchange is performed, the MU-MIMO data packet transmission is performed, wherein the MAC address in the MAC address field in the RTS frame payload sent by the AP is the MAC address of the STA-6, and is included in the physical frame header of the RTS frame. Group number Group ID=2 information.

 Using the method of this practical application, the decision process of each STA replying to ACK is as follows:

 (1) for STA-1

STA-1 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-1 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

3) the number of data streams of the STA in the third location in the MU-MIMO packet is 1; 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1; further analyzing the MAC address information in the frame payload, and discovering that its own MAC address is not included, so this transmission does not have its own data. .

 Based on the above information, STA-1 does not reply to ACK according to the method of this practical application.

 (2) For STA-2

The STA-2 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-2 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further parsing the MAC address information in the frame payload and discovering that its own MAC address is included, so this transmission has its own data;

 According to the foregoing, the STA-2 occupies the first position in the MU-MIMO packet. According to the received RTS frame, the MAC address in the RTS frame payload is the MAC address of the STA-6, and the STA is transmitted this time. -6 data.

 Based on the above information, STA-2 replies ACK 2 in accordance with the method of this practical application.

 (3) For STA-3, STA5, STA7 and STA8

 The STA-3 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and knows that the frame does not belong to its own MU-MIMO packet, and does not need to reply to the ACK.

 STAs that have the same processing as STA3 also have STA5, STA7, and STA8;

 (4) For STA-4

The STA-4 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number Group ID=2, and analyzes According to the foregoing, the information obtained by the STA-4 to parse the N _STS domain includes:

1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further analyzing the MAC address information in the frame payload and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-4 occupies the third position in the MU-MIMO packet. . Based on the above information, STA-4 replies to the third ACK according to the method of the actual application. (5) For STA-6

The STA-6 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-6 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further parsing the MAC address information in the frame payload and discovering that its own MAC address is included, so this transmission has its own data;

 According to the foregoing, STA-6 occupies the second position in the MU-MIMO packet; according to the received RTS frame, it can be known that the MAC address in the RTS frame payload is its own MAC address.

 Based on the above information, STA-6 replies with ACK first according to the method of this practical application. (6) For STA-9

The STA-9 receives the MU-MIMO data frame and parses the Group ID field in the VHT-SIG-A. It is known that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and the data is obtained. According to the foregoing, the information obtained by the STA-9 to parse the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further analyzing the MAC address information in the frame load and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-9 occupies the fourth position in the MU-MIMO packet. According to the received RTS frame, it can be known that the MAC address in the RTS frame payload is the MAC address of STA-6, and the data of STA-6 is transmitted this time.

 Based on the above information, STA-9 replies with ACK according to the method of this practical application. The order in which the ACK is finally returned:

 The first reply ACK STA is STA-6;

 The second reply ACK STA is STA-2;

 The third reply ACK STA is STA-4;

 The 4th reply ACK STA is STA-9.

Practical application of the first embodiment

 Assume that there are 1 AP and 9 STAs in the network, and 9 STAs are represented as the first station (STA-1), the second station (STA-2), the third station (STA-3), and the fourth station (STA). -4), fifth station (STA-5), sixth station (STA-6), seventh station (STA-7), eighth station (STA-8), ninth station (STA-9). Each MU-MIMO packet has a maximum of 4 STAs, and a MU-MIMO packet of less than 4 STAs is still considered to be composed of 4 STAs, and an insufficient portion can be considered to have a virtual STA.

The AP divides the nine STAs into multiple MU-MIMO packets according to the channel state information of each STA. And all the group information is notified to the STA, assuming that the group number is not enough, each group number can indicate multiple MU-MIMO packets, but there is such a constraint that if the same STA appears in multiple MUs indicated by the same group number In the MIMO packet, then the relative position of this STA in the group among these packets is fixed.

 In the actual application, the group number Group ID=2 indicates two MU-MIMO packets, and the two sub-components are 'STA-2, STA-6, STA-4, STA-1), (STA-2, STA) -6, STA-4, STA-9).

 The AP issues MU-MIMO packet information, and the MU-MIMO packet information includes the group number. The order in which the packet information is distributed is also in the order written above.

 In the actual application, the STAs identified by the MAC addresses carried in the data frame payload reply to the ACK in the order of the relative positions of the packets.

 In the current MU-MIMO transmission of the actual application, among the four STAs, STA-9, STA-6, STA-4, and STA-1 all have one data stream transmission, that is, the current transmission is for the group number Group ID= The second group under 2.

 After the RTS/CTS frame exchange is performed, the MU-MIMO data packet transmission is performed, wherein the MAC address in the MAC address field in the RTS frame payload sent by the AP is the MAC address of the STA-6, and is included in the physical frame header of the RTS frame. Group number Group ID=2 information.

 Using the method of this practical application, the decision process of each STA replying to ACK is as follows:

 (1) for STA-1

STA-1 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-1 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

4) the number of data streams of the STA in the fourth position in the MU-MIMO packet is 1; Further parsing the MAC address information in the frame load, and discovering that its own MAC address is not included, so this transmission does not have its own data;

 Based on the above information, STA-1 does not reply to ACK according to the method of this practical application.

 (2) For STA-2

The STA-2 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-2 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further analyzing the MAC address information in the frame load and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-2 occupies the first position in the MU-MIMO packet. . Based on the above information, STA-2 replies to the first ACK according to the method of this practical application. (3) For STA-3, STA5, STA7 and STA8

 The STA-3 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and knows that the frame does not belong to its own MU-MIMO packet, and does not need to reply to the ACK.

 STAs that have the same processing as STA3 also have STA5, STA7, and STA8;

 (4) For STA-4

The STA-4 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-4 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1; 3) the number of data streams of the STA in the third location in the MU-MIMO packet is 1;

4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further analyzing the MAC address information in the frame payload and discovering that its own MAC address is included, so the current transmission has its own data; according to the foregoing, STA-4 occupies the third position in the MU-MIMO packet. . Based on the above information, STA-4 replies to the third ACK according to the method of the actual application. (5) For STA-6

The STA-6 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by STA-6 to resolve the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

 3) The number of data streams of the STA in the third location in the MU-MIMO packet is 1;

 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1;

 Further parsing the MAC address information in the frame payload and discovering that its own MAC address is included, so this transmission has its own data;

 According to the foregoing, STA-6 occupies the second position in the MU-MIMO packet. Based on the above information, STA-6 replies to the second ACK according to the method of the present application. (6) For STA-9

The STA-9 receives the MU-MIMO data frame, parses the Group ID field in the VHT-SIG-A, and learns that the frame belongs to the MU-MIMO packet whose group number is Group ID=2, and analyzes the data. According to the foregoing, The information obtained by the STA-9 to parse the N _STS domain includes:

 1) the number of data streams of the STA in the first location in the MU-MIMO packet is 1;

 2) the number of data streams of the STA in the second location in the MU-MIMO packet is 1;

3) the number of data streams of the STA in the third location in the MU-MIMO packet is 1; 4) The number of data streams of the STA in the fourth position in the MU-MIMO packet is 1; further analyzing the MAC address information in the frame payload, and discovering that its own MAC address is included, so the current transmission has its own data; According to the foregoing, STA-9 occupies the fourth position in the MU-MIMO packet;

 Based on the above information, STA-9 replies with ACK according to the method of this practical application. The order in which the ACK is finally returned:

 The first reply ACK STA is STA-2;

 The second reply ACK STA is STA-6;

 The third reply ACK STA is STA-4;

 The 4th reply ACK STA is STA-9.

Embodiment 2: A site for feedback confirmation message (STA)

 The STA of this embodiment is applied to reply to an access point AP in a BSS, which is associated with one or more other STAs and APs, and mainly includes a first receiving module 210, a second receiving module 220, and a feedback module. 230, where:

 The first receiving module 210 is configured to: receive the RTS and the packet information sent by the AP, and learn, according to the packet information, the packet number of the MU-MIMO packet in which the STA itself is located and the relative location information of the STA itself in the MU-MIMO packet;

 The second receiving module 220 is configured to: receive the MU-MIMO data frame;

The feedback module 230 is connected to the first receiving module 210 and the second receiving module 220, and is configured to: according to the packet number field and the N _STS field included in the VHT-SIG-A in the physical frame header of the MU-MIMO data frame. The information, the MAC address information in the physical frame payload, and the MU-MIMO packet information under the packet number indicated by the Group ID field, determine the STA that needs to reply to the ACK, and reply the ACK message in the agreed order;

The AP performs MU-MIMO grouping on the STAs associated with each of the STAs according to the channel state information, the data traffic volume, the data service type, and the like of each STA, and specifies a packet number for each MU-MIMO packet. The packet information is separately constructed, and the packet information is notified to the STA by signaling. The feedback module 230 is configured to reply the ACK message in the order of the STAs in the MU-MIMO packet.

 The feedback module 230 may be configured to: reply the ACK message in order according to the relative position of the STAs identified by the MAC address carried in the MU-MIMO data frame payload in the MU-MIMO packet.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed over a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be fabricated into individual integrated circuit modules, or many of them Modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

 While the embodiments of the present invention have been described above, the described embodiments are merely for the purpose of understanding the invention and are not intended to limit the invention. Any modification and variation of the form and details of the invention may be made by those skilled in the art without departing from the spirit and scope of the invention. It is still subject to the scope defined by the appended claims.

Industrial applicability

 With the technical solution of the invention, it is ensured that the STAs in the MU-MIMO packet can reply ACKs in an orderly manner without additional signaling, and collisions are avoided between each other, and STAs without data transmission in the group need not transmit. ACK also saves signaling overhead. It also guarantees that the services of the primary STAs are given priority and therefore have strong industrial applicability.

Claims

Claim A method for multi-user feedback confirmation message, used for a site (STA) reply confirmation message (ACK) associated with an access point (AP) in a basic service set (BSS), the method comprising: The AP performs a multi-user-multiple input multiple output (MU-MIMO) packet on the STA associated with it, assigns a packet number to each MU-MIMO packet, and separately constructs the packet information, and notifies the STA to the STA; After requesting a transmission frame (RTS) and a MU-MIMO data frame, according to the packet information, the RTS, and a packet number (Group ID) included in the physical frame header of the MU-MIMO data frame, VHT-SIG-A The domain and site data flow information indicates information indicated by the (N _STS ) field, media access control (MAC ) address information in the payload of the physical frame of the MU-MIMO data frame, and the packet number indicated by the Group ID field The underlying MU-MIMO packet information determines the STAs that need to reply to the ACK and replies to the ACK in an agreed order. 2. The method according to claim 1, wherein the step of determining the STA that needs to reply to the ACK comprises: the packet number indicated by the Group ID field is the same as the packet number of the MU-MIMO packet in which the STA itself is located, the N The corresponding location in the _STS domain is not zero, and the payload of the physical frame carries the same MAC address as the STA's own MAC address, and the STA needs to reply to the ACK;  The corresponding location is the same as the relative location of the STA itself in the MU-MIMO packet. 3. The method according to claim 1, wherein the order of appointment comprises: an order of STAs in a MU-MIMO packet.  The method according to claim 3, wherein the order of the agreement comprises: first, the STA that replies to the ACK is an STA corresponding to the MAC address carried in the RTS; and the MU-MIMO data frame carries The remaining STAs identified by the MAC address reply to the ACK in the order of relative positions in the MU-MIMO packet. The method according to claim 3, wherein the order of appointment comprises: a relative position order of STAs identified by the MAC address carried in the MU-MIMO data frame payload in the MU-MIMO packet. The method according to claim 1, wherein the step of determining the STA that needs to reply to the ACK comprises: the packet number indicated by the Group ID field is different from the packet number of the MU-MIMO packet in which the STA itself is located, and the STA is There is no need to reply to the ACK. 7. The method according to claim 1, wherein the step of determining the STA that needs to reply to the ACK comprises: the packet number indicated by the Group ID field is the same as the packet number of the MU-MIMO packet in which the STA itself is located, the N The corresponding location indication in the _STS field is zero, then the STA does not need to reply to the ACK;  The corresponding location is the same as the relative location of the STA itself in the MU-MIMO packet. 8. The method according to claim 1, wherein the step of determining the STA that needs to reply to the ACK comprises: the packet number indicated by the Group ID field is the same as the packet number of the MU-MIMO packet in which the STA itself is located, the N The corresponding location indication in the _STS domain is not zero, and the MAC carried in the payload of the physical frame is different from the MAC address of the STA itself, and the STA does not need to reply to the ACK;  The corresponding location is the same as the relative location of the STA in the MU-MIMO packet. 9. The method of claim 1, wherein: specifying for each MU-MIMO packet 10. A station (STA) for feeding back a confirmation message, for replying an acknowledgement message (ACK) to an access point (AP) in a basic service set (BSS), two or more of the STAs and the STAs After the MU-MIMO packet specifies the packet number and constructs the packet information, the packet information is notified to the STA, where the STA includes a first receiving module, a second receiving module, and a feedback module, where:  The first receiving module is configured to: receive a request sending frame (RTS) sent by the AP, and group information, and learn, according to the grouping information, a packet number of the MU-MIMO packet where the STA itself is located, and the STA itself is in the MU-MIMO packet. Relative position information; The second receiving module is configured to: receive a multi-user-multiple input multiple output (MU-MIMO) data frame; The feedback module is configured to: according to the obtained packet number of the MU-MIMO packet in which the STA itself is located, and the relative location information of the STA itself in the MU-MIMO packet, the RTS, the physics of the MU-MIMO data frame The packet number (Group ID) field and the site data stream information indication (N _STS ) field included in the VHT-SIG-A in the frame header, the media access control (MAC) address information in the payload of the physical frame, and the location The MU-MIMO packet information under the packet number indicated by the Group ID field determines the STAs that need to reply to the ACK, and replies to the ACK in an agreed order. 11. The station of claim 10, wherein:  The feedback module is further configured to: reply the ACK in the order of the STAs in the MU-MIMO packet. 12. The station of claim 10, wherein:  The feedback module is further configured to: reply the ACK in the order of the relative positions of the STAs identified by the MAC address carried in the MU-MIMO data frame payload in the MU-MIMO packet.  The station according to any one of claims 10-12, wherein: the feedback module is configured to determine a STA that needs to reply to an ACK in the following manner: The packet number indicated by the group ID field is the same as the packet number of the MU-MIMO packet in which the STA itself is located, and the corresponding location in the N _STS domain is not zero, and the load of the physical frame carries the STA. If the MAC address of the MAC address is the same, the feedback module confirms that the STA needs to reply to the ACK.  The corresponding location is the same as the relative location of the STA itself in the MU-MIMO packet.