WO2012034447A1

WO2012034447A1 - Method for multi-user group identification and acquisition, access point, and station

Info

Publication number: WO2012034447A1
Application number: PCT/CN2011/076990
Authority: WO
Inventors: 田开波; 李峰; 吕开颖; 李楠
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-16
Filing date: 2011-07-08
Publication date: 2012-03-22
Also published as: CN102404852A; CN102404852B

Abstract

Disclosed are a method for multi-user (MU) group identification and acquisition, an access point (AP), and a station (STA). The method for MU group identification comprises: the AP transmitting to the STA a piece of group identification information, the group identification information being for use in marking uniquely a MU-MIMO subgroup of one MU-MIMO group, and the one MU-MIMO group comprising one or a plurality of MU-MIMO subgroups. The present invention allows for a clear distinction between different MU-MIMO subgroups having the same group identification, and provides more ways of grouping different STA subgroups.

Description

The present invention relates to the field of communications, and in particular to a MU-MIMO (multi-user multiple input multiple output) multi-user packet identification, acquisition method, and connection Entry point and site. BACKGROUND OF THE INVENTION Wireless Local Area Networks (WLANs) are wireless network technologies that interconnect computer devices to form a network system that can communicate with each other and share resources. The essence of WLAN is that the communication cable is no longer used to connect the computer to the network, but is connected wirelessly, so that the construction of the network and the movement of the terminal are more flexible. IEEE802.il is one of the mainstream technologies for wireless LANs. This protocol mainly specifies physical (PHY) layer 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 moving toward higher and higher speeds, going from 802.11 to 802.11b to 802. Ha/g, then 802.11n, Finally, the development history of 802.11ac. The actual physical technology has also evolved from direct sequence spread spectrum technology to OFDM (Orthogonal Frequency Division Multiplexing) technology, and introduced multi-antenna technology in IEEE802.11n, introducing large bandwidth and MU-MIMO in IEEE802.11ac (multiple Users lose more people and more output). After the MU-MIMO technology is introduced in the 802.1 lac system, the access point (AP) is based on one channel or multiple factors such as channel state information, data traffic, and data service type of each station (Station, STA). The combination of the factors, the MU-MIMO grouping of the STAs associated with the MU-MIMO group, and the MU-MIMO group of the MU-MIMO group, which is a group of multiple STAs that can occupy the same time-frequency resource for transmission. Group number, each MU-MIMO group is identified by only one GroupID, but one GroupID can indicate different MU-MIMO packets. Since the length of the GroupID indication field specified by the current protocol is 6 bits, it can provide up to 64 group numbers. Therefore, when the number of group numbers is limited, it is impossible to provide more combinations of different STAs, and it is not possible to clearly distinguish Different MU-MIMO packets with the same group number. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a multi-user packet identification, an acquisition method, an access point, and a station, to solve the above-mentioned related art MU-MIMO, which cannot provide a packet combination of more different STAs, and also The problem of different MU-MIMO packets with the same group number cannot be clearly distinguished. According to an aspect of the present invention, a multi-user packet identification method is provided, including: an access point transmitting packet identification information to a station STA, the packet identification information being used to uniquely identify one MU-MIMO packet of the same MU-MIMO group The same MU-MIMO group includes one or more MU-MIMO packets. Preferably, the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs. Preferably, the step of the access point sending the packet identification information to the STA is: the access point sends a sending reservation RTS frame to the STA, where the data flow in the RTS frame indicates that the N _STS domain carries the relative location information or the index number information of the STA, The media access control of the RTS frame The receive address field in the MAC frame header carries the identifier of the STA. Preferably, the identifier of the STA is the MAC address of the STA. Preferably, the STA identifying the MU-MIMO packet is an STA having data transmission in the MU-MIMO packet. Preferably, the step of the access point sending the transmission reservation RTS frame to the STA comprises: the access point setting the data stream bit of the STA in the N _STS domain of the RTS frame to 1 to indicate that the STA is the identifier MU-MIMO Packetized STA; sends an RTS frame to the STA. Preferably, the step of the access point sending the transmission reservation RTS frame to the STA comprises: the access point setting all the data stream bits of the other STAs except the STAs identifying the MU-MIMO packet in the N _STS domain of the RTS frame 0, sends an RTS frame to the STA. Preferably, the step of the access point sending the transmission reservation RTS frame to the STA includes: the access point in the N _STS domain of the RTS frame, except for the STA that identifies the MU-MIMO packet, the data stream bits of other STAs are in accordance with each STA The actual data stream is set to send an RTS frame to the STA. Preferably, when the same MU-MIMO group includes multiple MU-MIMO packets, multiple In each packet of a MU-MIMO packet, the relative position of at least one STA is different from its relative position in other packets than the packet. Preferably, the group identification information further includes group identifier GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs. According to another aspect of the present invention, a method for acquiring a multi-user packet is provided, including: receiving, by a station STA, packet identification information sent by an access point, where the packet identification information is used to uniquely identify a MU of the same MU-MIMO group. - MIMO packet, the same MU-MIMO group includes one or more MU-MIMO packets; the information of one MU-MIMO packet of the same MU-MIMO group is obtained according to the packet identification information. Preferably, the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs. Preferably, the step of the station STA receiving the packet identification information sent by the access point comprises: receiving, by the STA, a transmission reservation RTS frame sent by the access point, where the data flow in the RTS frame indicates that the N _STS domain carries the STA that identifies the MU-MIMO packet. Relative location information or index number information, the Receive Access Address field in the Media Access Control MAC header of the RTS frame carries the identifier of the STA identifying the MU-MIMO packet. Preferably, the RTS frame further includes: group identity GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs. Preferably, the step of the station STA acquiring the information of one MU-MIMO packet of the same MU-MIMO group according to the packet identification information comprises: the STA according to the GroupID information in the RTS frame, the relative location information of the STA that identifies the MU-MIMO packet Or the index number information, the identifier of the STA that identifies the MU-MIMO packet, and the information of one MU-MIMO packet of the same MU-MIMO group. Preferably, the STA acquires the same MU-MIMO group according to the GroupID information in the RTS frame, the relative location information of the STA that identifies the MU-MIMO packet or the index number information, and the identifier of the STA that identifies the MU-MIMO packet. The step of information of one MU-MIMO packet includes: the STA searches for the location indicated by the relative location information or the index number information in the MU-MIMO group indicated by the GroupID information, and the identifier is consistent with the STA identifier in the RTS frame. The MU-MIMO packet to which the STA belongs acquires information of the MU-MIMO packet. Preferably, the identifier of the STA is the MAC address of the STA. According to another aspect of the present invention, an access point is provided, including: a notification module, configured to send, to a station STA, packet identification information, where the packet identification information is used to uniquely identify a MU of the same MU-MIMO group. MIMO packets, the same MU-MIMO group includes one or more MU-MIMO packets. Preferably, the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs. Preferably, the notification module includes: an RTS frame notification module, configured to send a transmission reservation RTS frame to the STA, where the data flow in the RTS frame indicates that the N _STS domain carries relative location information or index number information of the STA, and media access control of the RTS frame The receiving address field in the MAC frame header carries the identifier of the STA. Preferably, the identifier of the STA is the MAC address of the STA. Preferably, when the same MU-MIMO group includes a plurality of MU-MIMO packets, at least one of the plurality of MU-MIMO packets has a relative position different from that of the other packets except the packet. Relative position. Preferably, the group identification information further includes group identifier GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs. According to another aspect of the present invention, a station STA is further provided, including: a receiving module, configured to receive packet identification information sent by an access point, where the group identification information is used to uniquely identify a MU of the same MU-MIMO group a MIMO packet, the same MU-MIMO group comprising one or more of said MU-MIMO packets; an acquisition module arranged to acquire information of one MU-MIMO packet of the same MU-MIMO group based on the packet identification information. Preferably, the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs. Preferably, the receiving module includes: an RTS frame receiving module, configured to receive a sending reservation RTS frame sent by the access point, where the data stream in the RTS frame indicates that the N _STS domain carries relative location information of the STA that identifies the MU-MIMO packet Or index number information, media access control MAC frame header of the RTS frame Receive address i or an identifier carrying a STA that identifies the MU-MIMO packet. Preferably, the RTS frame further includes: group identity GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs. Preferably, the obtaining module comprises: an RTS frame acquiring module, configured to acquire according to GroupID information in the RTS frame, relative location information or index number information of the STA that identifies the MU-MIMO packet, and identifier of the STA that identifies the MU-MIMO packet. Information of one MU-MIMO packet of the same MU-MIMO group. Preferably, the RTS frame obtaining module is configured to search, in the MU-MIMO group indicated by the GroupID information, the MU to which the STA whose identifier is consistent with the STA identifier in the RTS frame is located at the location indicated by the relative location information or the index number information. - MIMO packet, obtaining information of the MU-MIMO packet. Preferably, the identifier of the STA is the MAC address of the STA. With the present invention, the access point is used to send packet identification information carrying the MU-MIMO packet uniquely identifying the same MU-MIMO group to the station, and the specific MU-MIMO packet is identified by the information, and the packet identification information can be Notifying the MU-MIMO packet that the station is to transmit data, solving the problem in the related art that the different MU-MIMO packets having the same group number cannot be clearly distinguished; meanwhile, since the packet identification information can uniquely identify one MU-MIMO packet, The ingress point can notify the station of the group identification information, and the station can obtain the information of the MU-MIMO packet of the data to be transmitted, so that the STA does not need to be limited to the number of packets limited by the limited bit when the packet is grouped, thereby solving the problem that the related technology cannot provide more. The problem of packet combination of a plurality of different STAs, thereby achieving the effect of clearly distinguishing different MU-MIMO packets having the same group number, providing more combinations of different STAs. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing the steps of a multi-user packet identification method according to a first embodiment of the present invention; FIG. 2 is a flow chart showing the steps of a multi-user packet acquisition method according to a second embodiment of the present invention; 3 is a flow chart showing the steps of a multi-user group identification method according to Embodiment 3 of the present invention; 4 is a flow chart showing the steps of a multi-user packet acquisition method according to Embodiment 4 of the present invention; FIG. 5 is a schematic diagram of the filling of an N _STS field of an RTS frame according to Embodiment 5 of the present invention; filling a schematic view of FIG Ί N _STS domain according to the present invention is one kind of RTS frames according to a seventh embodiment;; N _STS filling domain is a schematic embodiment of a RTS frame according to a six embodiment of the present invention, FIG 8 is an embodiment of the present invention 8 is a structural block diagram of an access point; FIG. 9 is a structural block diagram of a station in Embodiment 9 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Referring to FIG. 1, a flow chart of a multi-user packet identification method according to Embodiment 1 of the present invention is shown, which includes the following steps: Step S102: The access point sends packet identification information to the station. The packet identification information is used to uniquely identify one MU-MIMO packet in the same MU-MIMO group, and may be an identifier of the STA that uniquely identifies one MU-MIMO packet (such as the MAC address of the STA) and the STA is in the The relative location information or the index number information in the packet may also be an index number of the MU-MIMO packet in the MU-MIMO group to which the MU-MIMO packet belongs, and the skilled person may also use other packet identification information manners, and the unique identifier may be the same. Each MU-MIMO packet belonging to a MU-MIMO group. The station can obtain the related information of the MU-MIMO packet of the data to be transmitted by using the packet identification information sent by the access point. The packet identification information is preferably an RTS frame. Of course, it may also be other information, such as: carrying the packet identification information and the like in the information that directly transmits the data to the notification site. In the related art, whether the RTS frame sent by the access point to the station or the information about the data sent by the station is not clearly distinguishable from different MU-MIMO packets having the same group number, and subject to the length of the GroupID indication field, It is not possible to provide more combinations of different STAs. In this embodiment, the access point is sent to the station to carry the unique identifier in the same MU-MIMO group.

The group identification information of the MU-MIMO packet, by which the station can be notified that the data is to be transmitted.

MU-MIMO grouping, enabling stations to clearly distinguish between different MU-MIMOs with the same group number At the same time, because the packet identification information can uniquely identify one MU-MIMO packet, as long as the access point can notify the station of the packet identification information, the station can acquire the information of the MU-MIMO packet of the data to be transmitted, so that the STA is in the grouping time. , does not have to be limited to the number of packets limited by limited bits. Referring to FIG. 2, a flow chart of steps of a multi-user packet acquisition method according to Embodiment 2 of the present invention is shown. In this embodiment, corresponding to the first embodiment, the station receives the packet identification information sent by the access point, and parses and obtains the information of the specific MU-MIMO packet. The multi-user packet obtaining method of this embodiment includes the following steps: Step S202: The STA receives the packet identification information sent by the access point; the packet identification information is sent by the access point, and is used to uniquely identify one MU of the same MU-MIMO group. - MIMO packets, the same MU-MIMO group may include one or more MU-MIMO packets. Step S204: The STA acquires information of one MU-MIMO packet of the same MU-MIMO group according to the packet identification information. The station determines the MU-MIMO packet of the data to be transmitted in the MU-MIMO group according to the packet identification information. Referring to FIG. 3, a flow chart of a multi-user packet identification method according to Embodiment 3 of the present invention is shown, which includes the following steps: Step S302: Assign a group identifier GroupID of a MU-MIMO group to one or more MUs. - MIMO packet. Generally, the number of MU-MIMO packets is more than the number of GroupIDs. At this time, one GroupID identifies multiple MU-MIMO packets, but one MU-MIMO packet belongs to only one MU-MIMO group identified by one GroupID. Step S304: Uniquely identify each MU-MIMO packet in the plurality of MU-MIMO packets under the same MU-MIMO group by using the packet identification information. In this embodiment, one MU-MIMO packet is identified by using the relative location information of one STA in the group and the MAC address of the STA. In all MU-MIMO packets of the same GroupID, each MU-MIMO packet can use relative location information and identifiers within the group with one of the one or more STAs that can identify the MU-MIMO packet within the group ( Such as a MAC address) to uniquely identify the MU-MIMO packet. Where the STA identifying the MU-MIMO packet means that it appears here The relative positions in the MU-MIMO packets are different from the relative positions in other MU-MIMO packets that appear under the same GroupID. Of course, the index of the STA in the group that can identify a MU-MIMO packet can also be used to identify the MU-MIMO packet to which it belongs. The identity of the STA in its MU-MIMO packet can be determined quickly and easily by the relative location information or index number information of a STA in the group. It should be noted that if a MU-MIMO packet has multiple STAs that can identify the MU-MIMO, any combination of multiple STAs may also be used to identify the MU-MIMO packet. Step S306: The access point sends the packet identification information to the station. In this embodiment, the N _STS field (data flow indication field) in the RTS (Ready To Send) frame is used to indicate the relative position of the STA identifying the MU-MIMO packet within the group. Preferably, the bits in the N _STS field of the RTS frame used to indicate the number of data streams of the STA identifying the MU-MIMO packet are all set to 1 in order to distinguish the STAs identifying the MU-MIMO packet. Preferably, the bits of the number of data streams used to indicate the STA of the non-identifying MU-MIMO packet in the N _STS field of the RTS frame are all set to zero. Preferably, the bits of the N _STS field of the RTS frame used to indicate the number of data streams of the STAs that do not identify the MU-MIMO packet may also be set according to the actual data stream of each STA. Preferably, the MAC address filled in the receiving address field in the MAC frame header of the RTS frame is the MAC address of the STA identifying the MU-MIMO packet. Preferably, if there are multiple STAs in the group that can identify the MU-MIMO packet in which the MU-MIMO packet is located, the receiving address i or the filled MAC address in the MAC frame header of the RTS frame can identify the MU-MIMO packet and the current MU-MIMO transmission There is a MAC address of any STA that has data transmission, in order to achieve fast and efficient data transmission. If only one STA in the group can identify the MU-MIMO packet, the MAC address filled in the receiving address field in the MAC frame header of the RTS frame is the MAC address of the STA, regardless of whether the STA has data transmission this time. The STA can be quickly found by the MAC address of the STA that can be identified. The specific MU-MIMO packet of this transmission can be clearly indicated by using the GroupID field in the RTS frame, the N _STS field, and the address i or in the MAC frame header of the RTS frame. Of course, those skilled in the art can also set the access point to carry the packet identification information by using other suitable data frames or messages. It should be noted that if the packet identification information is an index number of a different MU-MIMO packet under the same GroupID (for example, the first packet index number is 1, and the second packet index number is 2, ... When the Nth packet index number is N), additional signaling is required to inform the site differently. The index number information of the MU-MIMO packet, of course, the additional signaling can also fully utilize the existing signaling implementation, and can be appropriately set by a person skilled in the art as needed. Referring to FIG. 4, a flow chart of steps of a multi-user packet acquisition method according to Embodiment 4 of the present invention is shown. The embodiment corresponds to the embodiment 3. The station receives the RTS frame sent by the access point, and parses the information of the MU-MIMO packet that is to be transmitted in the RTS frame. The multi-user packet obtaining method of this embodiment includes the following steps: Step S402: The STA receives an RTS frame sent by the access point; the N _STS field of the RTS frame carries relative location information or index number information of the STA that identifies the MU-MIMO packet. The receiving address field in the MAC frame header of the RTS frame carries the identifier of the STA that identifies the MU-MIMO packet, and the RTS frame also carries the GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs. Preferably, in this embodiment, the identifier of the STA is the MAC address of the STA. Step 404: The STA acquires information of one MU-MIMO packet of the same MU-MIMO group according to the RTS frame. In this step, the STA acquires the same MU-MIMO group according to the GroupID information in the RTS frame, the relative location information of the STA that identifies the MU-MIMO packet, or the index number information, and the identifier of the STA that identifies the MU-MIMO packet. Information about a MU-MIMO packet. Specifically, the STA searches for the MU-MIMO packet to which the STA corresponding to the STA identifier in the RTS frame belongs to the MU-MIMO group indicated by the GroupID information, and obtains the location indicated by the relative location information or the index number information. The information of the MU-MIMO packet. Referring to FIG. 5, there is shown a padding diagram of an N _STS field of an RTS frame according to Embodiment 5 of the present invention. In this embodiment, there are one AP and eight STAs in the network, and eight STAs are called A, B, C, D, E, F, G, and H, and each STA uses its MAC address as the identifier. For each MU-MIMO packet, there can be up to 4 users, N _max _ = 4 , and the number of GroupIDs is 2. First, the AP performs possible MU-MIMO packets according to the channel state information of 8 STAs, and has 16 groups: (ABCD), (ABCH), (ABGD), (ABGH), (AFCD), (AFCH),

(AFGD), (AFGH), (EBCD), (EBCH), (EBGD), (EBGH), (EFCD),

( EFCH ), ( EFGD ), ( EFGH ). Note that the STAs in each parenthesis above have not been sequenced. Each group of MU-MIMO packets is assigned a GroupID. Since there are only two GroupIDs, each GroupID may need to indicate multiple packets. In order to effectively utilize the packet information without confusion, the relatives of the STAs in each of the above packets are adjusted. In the case of location, each MU-MIMO packet under the same GroupID can be uniquely identified by the relative location information of one or more STAs in the group. Those skilled in the art can perform the grouping or adjusting the STA order in the packet under the principle, and can be implemented by any prior art method (such as exhaustive or traversal algorithm, etc.). In this embodiment, a specific grouping is implemented as follows:

GroupID: 1 :

(ABCD), (BACH), (GFAD), (FGHA), (DEBC), (HCBE), (EDBG), (GHEB);

GroupID=2:

(ABGD), (BAGH), (FCAD), (FHCA), (CEFD), (EFHC), (EGDF), (GHFE). The above specific grouping is analyzed according to the above-mentioned principle of grouping or adjusting the STA order in the packet:

The first packet of GroupID=l (ABCD), which can be used to identify the STAs of this packet, has A and B, because A occupies the first relative position in the group in this packet, and A has the remaining 7 packets in GroupID=l. The three groups in (BACH), (GFAD), (FGHA) appear, but the relative positions in the three groups are not the first one in the group; the same B in the group occupies the first in the group Two relative positions, B appears in 5 of the remaining 7 packets of GroupID=l ((BACH), (DEBC), (HCBE), (EDBG), (GHEB)), but in these 5 groups The relative position is not the second in the group. C and D in this group cannot be used as STAs to identify this group. Because C appears in the third position of this group, it also appears in the third position in the (BACH) group. Similarly, D appears in the group. Four positions, which also appear in the fourth position in the (GFAD) group. The second packet of GroupID=l (BACH), which can be used to identify the STAs of this packet, has B, A, and H, because A occupies the second relative position in the group in this packet, and A is in the remaining 7 of GroupID=l. Three groups in the group ((ABCD), (GFAD), (FGHA)) appear, but the relative positions in the three groups are not the second in the group; likewise, B occupies the group in this group Within the first relative position, B is 5 packets in the remaining 7 packets of GroupID=l ((ABCD), (DEBC), (HCBE), ( EDBG ), ( GHEB ) ) appears, but the relative position in these 5 groups is not the first one in the group; likewise, H occupies the fourth relative position in the group in this group, H is in GroupID= 3 out of the remaining 7 packets ((FGHA), (HCBE), (GHEB)), but the relative positions in the 3 packets are not the fourth in the group; C in this group Cannot be used as the STA that identifies this packet, because C appears in the third position, and it also appears in the third position in the (ABCD) group. In the same analysis, the third packet of GroupID=l (GFAD) can be used to identify the STAs of this packet with F and A.

The fourth packet of GroupID=l (FGHA), which can be used to identify the STA of this packet, has F, G, H, and A.

The fifth packet of GroupID=l (DEBC), which can be used to identify the STA of this packet, has D, E, and C.

The sixth packet (HCBE) of GroupID=l can be used to identify the STAs of this packet with H, C, and E. The seventh group (EDBG) of GroupID=l, which can be used to identify the STAs of this group, has E, D, and G.

The eighth group (GHEB) of GroupID=l can be used to identify the 8th, E, and B of this group. Similar to the analysis, the first packet of GroupID=2 (ABGD) can be used to identify the STA of this packet with A B.

The second packet of GroupID=2 (BAGH), which can be used to identify the STA of this packet, has A, B, G, and H.

The third group (FCAD) of GroupID=2, which can be used to identify the STA of this group has C and

A. The fourth packet of GroupID=2 (FHCA), which can be used to identify the STA of this packet has C and

A.

The fifth packet of GroupID=2 (CEFD), which can be used to identify the STA of this packet, has C and E. The sixth packet of GroupID=2 (EFHC), which can be used to identify the STAs of this packet, has E, F, H, and C.

The seventh packet of GroupID=2 (EGDF), which can be used to identify the STA of this packet, has E, G, D, and F. The eighth packet (GHFE) of GroupID=2, which can be used to identify the STA of this packet, has G and E.

The AP notifies the STA of the group information, and after receiving the group information, the STA can obtain detailed group information under the group ID. In the case of the above grouping, it is assumed that the upcoming MU-MIMO transmission is for the first MU-MIMO packet (ABCD) under GroupID=1, and the three STAs of the transmission group ABD each have one data stream, and C does not. Data stream transmission. Before performing MU-MIMO data transmission, the AP sends an RTS frame, and the GroupID field of the RTS frame indicates GroupID=l; the N _STS field indicates the number of data streams of the STA at the first position in the MU-MIMO packet. The bit is set to 001, and the 3 bits used to indicate the number of STAs of the STA in the second location in the MU-MIMO packet are set to 111 (to indicate that it is the STA that identifies the MU-MIMO packet, and of course, STA A identifies the MU-MIMO packet, and sets the number of data streams of the STA at the first location to be 111), which is used to indicate the number of STAs of the STA at the third location in the MU-MIMO packet. The bit is set to 000, which is used to indicate that the 3 bits of the number of STAs in the fourth position in the MU-MIMO packet are set to 001, as shown in FIG. According to this embodiment, the STA that identifies the MU-MIMO packet for the transmission is the STA at the second location in the group, and the number of STA data streams in the first location and the fourth location in the group are 1. The number of data streams of the STA in the third position is 0, that is, the transmission does not include the data of the STA in the third position; the receiving address field in the MAC frame header of the RTS frame fills in the MAC address of the STA B. . After each STA receives the RTS frame, it processes as follows:

After receiving the RTS frame, A can analyze the GroupID field, the N _STS field, and the receiving address field in the MAC frame header to obtain useful information as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA in the second location in the group, and the STA is B, and then according to the received MU-MIMO packet information of GroupID=1, it is in GroupID=l There are 4 MU-MIMO packets (that is, 4 MU-MIMO packets including A): (ABCD), (BACH), (GFAD), (FGHA), where there are 2 packets containing B: (ABCD ), ( BACH ), in the 2 in the group B is in the second position The set MU-MIMO packet is (ABCD), so A knows that the MU-MIMO packet of the MU-MIMO transmission is (ABCD), and A is in the first position in the packet, and then according to N _STS The number of data streams indicating the MU-MIMO transmission A in the domain is 1.

After receiving the RTS frame, B can analyze the GroupID field, the N _STS field, and the receiving address field in the MAC frame header to obtain useful information as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA at the second location in the group, and the STA is B, and then the MU-MIMO packet information under the received GroupID=l is received, because it is represented by itself. There are 6 MU-MIMO packets of STAs of this group and themselves in GroupID=1 (that is, 6 MU-MIMO packets including B): (ABCD), (BACH), (DEBC), (HCBE), ( EDBG ), ( GHEB ), the MU-MIMO packet in the second position in the packet is (ABCD), and thus B knows that the MU-MIMO packet of the 40 pairs of MU-MIMO transmission is (ABCD).

After receiving the RTS frame, C can analyze the GroupID field, the N _STS field, and the receiving address field in the MAC frame header to obtain useful information as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA in the second location in the group, and the STA is B, and then according to the received MU-MIMO packet information of GroupID=1, it is in GroupID=l There are 4 MU-MIMO packets (ie 4 MU-MIMO packets including C): (ABCD), (BACH), (DEBC), (HCBE), where there are 4 packets containing B: (ABCD ), (BACH), (DEBC), (HCBE), the MU-MIMO packet in which the B is in the second position in the group in the packet is (ABCD), and thus C knows that the MU-MIMO transmission 4 Ten pairs of MU-MIMO packets are (ABCD). C is in the third position in this packet, and according to the indication in the N _STS field, the number of data streams of the MU-MIMO transmission C is 0, that is, the current transmission does not contain data of C.

After receiving the RTS frame, the useful information obtained by parsing the GroupID field, the N _STS field, and the receiving address field in the MAC frame header is as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA in the second location in the group, and the STA is B, and then according to the received MU-MIMO packet information of GroupID=1, it is in GroupID=l There are 4 MU-MIMO packets (that is, 4 MU-MIMO packets including D): (ABCD), (GFAD), (DEBC), (EDBG), which contains 3 packets of B: (ABCD ), (DEBC), (EDBG), in these three MU-MIMO packets in the group B in the second position in the group is (ABCD), from which D can know that this MU-MIMO transmission 40 pairs of MU - MIMO packet is (ABCD). D is in the fourth position in this group, only 艮 According to the indication in the N _STS field, the number of data streams of the MU-MIMO transmission D is 1.

After receiving the RTS frame, the useful information obtained by parsing the GroupID field, the N _STS field, and the receiving address field in the MAC frame header is as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA in the second location in the group, the STA is B, and according to the received MU-MIMO packet information of GroupID=1, the MU itself is in GroupID=l There are 4 MIMO packets (that is, 4 MU-MIMO packets including E): (DEBC), (HCBE), (EDBG), (GHEB), where there are 4 packets containing B: (DEBC), (HCBE), ( EDBG ), ( GHEB ), in which there are no Bs in the second group in the group, so E can determine that this MU-MIMO transmission is not for the MU-MIMO packet in which it is located. If E holds all the packets under GroupID=l, then it is also possible to determine that the packet for the MU-MIMO transmission is (ABCD) by the information that B is in the second position in the packet. After receiving the RTS frame, the rest of the STAs are treated similarly to E. Referring to FIG. 6, there is shown a padding diagram of an N _STS field of an RTS frame according to Embodiment 6 of the present invention. In this embodiment, there are one AP and eight STAs in the network, and eight STAs are called A, B, C, D, E, F, G, and H, and each STA uses its MAC address as the identifier. For each MU-MIMO packet, it can contain up to 4 users, N_=4, and the number of GroupIDs is 2. First, the AP performs possible MU-MIMO packets according to the channel state information of 8 STAs, and has 16 groups: (ABCD), (ABCH), (ABGD), (ABGH), (AFCD), (AFCH), (AFGD) ), ( AFGH ), ( EBCD ), ( EBCH ), ( EBGD ), ( EBGH ), ( EFCD ), ( EFCH ), ( EFGD ), ( EFGH ). Note that the STAs in each parenthesis above have not been sequenced. Each group of MU-MIMO packets is assigned a GroupID. Since there are only two GroupIDs, each GroupID may need to indicate multiple packets. In order to effectively utilize the packet information without confusion, the relatives of the STAs in each of the above packets are adjusted. In the case of location, each MU-MIMO packet under the same GroupID can be uniquely identified by the relative location information of one or more STAs in the group. In this embodiment, a specific grouping is implemented as follows:

GroupID: 1 : (ABDC), (BACH), (GFAD), (FGHA), (DEBC), (HCBE), (EDBG), (GHEB);

GroupID=2:

(ABGD), (BAGH), (FCAD), (FHCA), (CEFD), (EFHC), (EGDF), (GHFE). Compared with the embodiment shown in FIG. 5, the difference is that: the first group under GroupID=l of the embodiment shown in FIG. 5 is (ABCD), and the first group under GroupID=l in this embodiment is ( ABDC), the four STAs in the group have not changed, but the order of STAs within the group has changed. Affected by this, the changes are: The STAs of the first group (ABDC) identifying GroupID=l are A, B and D;

The STA of the second packet (BACH) of GroupID=l is A, B, C, and H; the STAs of the third packet (GFAD) identifying GroupID=l are F, A, and D; the third identifying GroupID=l The STAs of the packets (GFAD) are D and E; the remaining packets are unaffected, and the packet ordering still satisfies the principle of the above-mentioned packet or adjusting the STA order within the packet. It can be seen that in the case of the same grouping, the relative positions of the STAs in each group are reasonably arranged, and different allocation results can be obtained, but the effect is the same.

The AP notifies the STA of the group information, and after receiving the group information, the STA can obtain detailed group information under the group ID. In the case of the above grouping, it is assumed that the upcoming MU-MIMO transmission is for the first MU-MIMO packet (ABDC) under GroupID=l. Before performing MU-MIMO data transmission, the AP sends an RTS frame, and the GroupID field of the RTS frame indicates GroupID=1; the N _STS field indicates the number of data streams of STAs at the second location in the MU-MIMO packet. The number of bits is set to 111 (to indicate that it is the STA that identifies the MU-MIMO packet, and any other STA that can identify the packet, and the three bits of the number of data streams at the corresponding location are set to 111), The bits indicating the number of data streams of the STAs at the remaining positions in the MU-MIMO packet are all set to 0, as shown in FIG. According to this embodiment, the STA that identifies the MU-MIMO packet for this transmission is the STA at the second location in the group; the receiving address field in the MAC frame header of the jtb RTS frame fills in the MAC address of STA B. After each STA receives the RTS frame, it processes as follows:

Α After receiving the RTS frame, the useful information obtained by parsing the GroupID field, the N _STS field, and the receiving address field in the MAC frame header is as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA in the second location in the group, the STA is B, and according to the received MU-MIMO packet information of GroupID=1, the MU itself is in GroupID=l There are four MIMO packets: (ABDC), (BACH), (GFAD), (FGHA), where there are two packets containing B: (ABDC), (BACH), where B is in group B The MU-MIMO packet in the second location is (ABDC), and thus A knows that the 40-pair MU-MIMO packet of the MU-MIMO transmission is (ABDC). After receiving the RTS frame, B can analyze the GroupID field, the N _STS field, and the receiving address field in the MAC frame header to obtain useful information as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA at the second location in the group, and the STA is B, and then the MU-MIMO packet information under the received GroupID=l is received, because it is represented by itself. There are 6 MU-MIMO packets of this grouped STA and GroupID=l: (ABDC), (BACH), (DEBC), (HCBE), (EDBG), (GHEB), in the group in the group The MU-MIMO packet of the first location is (ABDC), and thus B knows that the MU-MIMO packet of the 40-pair MU-MIMO transmission is (ABDC).

After receiving the RTS frame, C can analyze the GroupID field, the N _STS field, and the receiving address field in the MAC frame header to obtain useful information as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA in the second location in the group, and the STA is B, and then according to the received MU-MIMO packet information of GroupID=1, it is in GroupID=l There are 4 MU-MIMO packets: (ABDC), (BACH), (DEBC), (HCBE), where there are 4 packets containing B: (ABDC), (BACH), (DEBC), (HCBE), The MU-MIMO packets in the second position in the group B in the group are (ABDC), and thus C knows that the MU-MIMO packet of the MU-MIMO transmission of 40 pairs is (ABDC).

After receiving the RTS frame, the useful information obtained by parsing the GroupID field, the N _STS field, and the receiving address field in the MAC frame header is as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA in the second location in the group, the STA is B, and according to the received MU-MIMO packet information of GroupID=1, the MU itself is in GroupID=l There are four MIMO packets: (ABDC), (GFAD), (DEBC), (EDBG), where there are three packets containing B: (ABDC), (DEBC), (EDBG), Among the three MU-MIMO packets in which the B is in the second position in the group is (ABDC), and thus D knows that the MU-MIMO packet of the MU-MIMO transmission of 40 pairs is (ABDC).

After receiving the RTS frame, the useful information obtained by parsing the GroupID field, the N _STS field, and the receiving address field in the MAC frame header is as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA in the second location in the group, and the STA is B, and then according to the received MU-MIMO packet information of GroupID=1, it is in GroupID=l There are four MU-MIMO packets: (DEBC), (HCBE), (EDBG), (GHEB), which contains four groups of B: (DEBC), (HCBE), (EDBG), (GHEB), There are no packets in B group that are in the second position in the group, so E can determine that the MU-MIMO transmission is not 40 pairs of MU-MIMO packets in the group; if E saves all packets under GroupID=l, then It is also possible to determine that the 40-pair packet of the MU-MIMO transmission is (ABDC) by the information that B is in the second position in the packet. After receiving the RTS frame, the rest of the STAs are treated similarly to E. Referring to FIG. 7, there is shown a padding diagram of an N _STS field of an RTS frame according to Embodiment 7 of the present invention. In this embodiment, there are one AP and eight STAs in the network, and eight STAs are called A, B, C, D, E, F, G, and H, and each STA uses its MAC address as the identifier. For each MU-MIMO packet, it can contain up to 4 users, N_=4, and the number of GroupIDs is 2. First, the AP performs possible MU-MIMO packets according to the channel state information of 8 STAs, and has 16 groups: (ABCD), (ABCH), (ABGD), (ABGH), (AFCD), (AFCH), (AFGD) ), ( AFGH ), ( EBCD ), ( EBCH ), ( EBGD ), ( EBGH ), ( EFCD ), ( EFCH ), ( EFGD ), ( EFGH ). Note that the STAs in each parenthesis above have not been sequenced. Each group of MU-MIMO packets is assigned a GroupID. Since there are only two GroupIDs, each GroupID may need to indicate multiple packets. In order to effectively utilize the packet information without confusion, the relatives of the STAs in each of the above packets are adjusted. In the case of location, each MU-MIMO packet under the same GroupID can be uniquely identified by the relative location information of one or more STAs in the group. In this embodiment, a specific grouping is implemented as follows:

GroupID: 1 : (BACH), (GFAD), (FGHA), (DEBC), (HCBE), (EDBG), (GHEB);

GroupID=2:

(ABGD), (BAGH), (FCAD), (FHCA), (CEFD), (EFHC), (EGDF), (GHFE), (DACB). Compared with the embodiment shown in FIG. 3, the difference is that: the first group under GroupID=l in the embodiment shown in FIG. 3 is (ABCD), and the order in the adjustment group is (DACB), and the allocation group number GroupID= 2; thus GroupID=l is assigned to 7 MU-MIMO packets, GroupID=2 is assigned to 9 MU-MIMO packets, and the original order of the STAs in the above-mentioned packet or adjustment packet is still affected by this adjustment. The change is: In the embodiment shown in FIG. 5, the original second packet of GroupID=l is now the first packet (BACH) in this embodiment, and the STA that identifies the packet becomes B, A, C, and H, and the rest The grouping is not affected. Compared with the embodiment shown in FIG. 5, the STA identifying the second packet (BAGH) of GroupID=2 in this embodiment becomes B, G and H; and the fourth packet (FHCA) identifying the GroupID=2 in this embodiment. STA of the ninth packet (DACB) of this embodiment group ID=2 is D and B; STAs of other packets that identify GroupID=2 of this embodiment are completely complete with the embodiment shown in FIG. the same.

The AP notifies the STA of the group information, and after receiving the group information, the STA can obtain detailed group information under the group ID. In the case of the above-mentioned grouping, it is assumed that the upcoming MU-MIMO transmission is for the first MU-MIMO packet (BACH) under GroupID=1, and each of the four STAs in the current transmission group has one data stream. All four STAs in this packet can identify this packet. Before performing MU-MIMO data transmission, the AP sends an RTS frame, and the GroupID field of the RTS frame indicates GroupID=l; the N _STS field indicates the number of data streams of the STA at the first position in the MU-MIMO packet. The bit is set to 001, and the 3 bits used to indicate the number of STAs of the STA in the second position in the MU-MIMO packet are set to 001, which is used to indicate the data of the STA in the third position in the MU-MIMO packet. The 3 bits of the number of streams are set to 001, which is used to indicate that the 3 bits of the number of STAs of the STA in the fourth position in the MU-MIMO packet are set to 111 (to indicate that it is the STA that identifies the MU-MIMO packet, Any other STA that can identify the packet can also be used, and the 3 bits of the number of data streams at its corresponding location are set to 111), as shown in FIG. According to this embodiment, identifying this The STA of the MU-MIMO packet for the secondary transmission is the STA at the fourth position in the group, and the number of STA data streams in the remaining positions in the group is 1; the receiving address field in the MAC frame header of the RTS frame is filled in the STA H's MAC address. After receiving the RTS frame, each STA is processed as follows: After receiving the RTS frame, A can analyze the GroupID field, the N _STS field, and the receiving address field in the MAC frame header to obtain useful information as follows: This MU-MIMO transmission The number of the target MU-MIMO packet is GroupID=l, and the MU-MIMO packet is identified by the STA at the fourth position in the group, and the STA is H, and then according to the received GroupID=l MU-MIMO packet information, there are three MU-MIMO packets with GroupID=1: (BACH), (GFAD), (FGHA), where there are one packet containing H: (BACH), where H is in the packet The MU-MIMO packet in the fourth position in the group is (BACH), so that A knows that the MU-MIMO packet of the 40-pair MU-MIMO transmission is (BACH), and A is in the second position in the packet. According to the indication in the N _STS domain, the number of data streams of the MU-MIMO transmission A is 1.

After receiving the RTS frame, B can analyze the GroupID field, the N _STS field, and the receiving address field in the MAC frame header to obtain useful information as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA at the fourth position in the group, and the STA is H, and then according to the received MU-MIMO packet information of GroupID=1, it is in GroupID=l There are five MU-MIMO packets: (BACH), (DEBC), (HCBE), (EDBG), (GHEB), and there are three packets containing H: (BACH), (HCBE), (GHEB), In these three packets, the MU-MIMO packet whose H is in the fourth position in the group is (BACH), and thus B knows that the MU-MIMO packet of the MU-MIMO transmission is 40 (BACH); B is here. The first position in the packet is 1, according to the indication in the N _STS field, the number of data streams of the MU-MIMO transmission C is 1.

After receiving the RTS frame, C can analyze the GroupID field, the N _STS field, and the receiving address field in the MAC frame header to obtain useful information as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA at the fourth position in the group, and the STA is H, and then according to the received MU-MIMO packet information of GroupID=1, it is in GroupID=l There are three MU-MIMO packets: (BACH), (DEBC), (HCBE), where there are two packets containing H: (BACH), (HCBE), where the two are in the group H is in the group The MU-MIMO packet at the four locations is (BACH), and thus C knows that the MU-MIMO packet of the 40-pair MU-MIMO transmission is (BACH). C is in the third position within this packet, and the number of data streams of this MU-MIMO transmission C is 1 according to the indication in the N _STS field. After receiving the RTS frame, the H can obtain useful information by parsing the GroupID field, the N _STS field, and the receiving address field in the MAC frame header. The MU-MIMO packet number for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA at the fourth position in the group, and the STA is H, and then the MU-MIMO packet information under the received GroupID=l is received, which is represented by itself. The STA of this group, which has its own GroupID=1, has three MU-MIMO packets: (GFAD), (DEBC), (EDBG), in these three MU-MIMOs in the group where H is in the fourth position in the group. The packet is (BACH), and thus H knows that the MU-MIMO packet of the 40-pair MU-MIMO transmission is (BACH).

After receiving the RTS frame, the useful information obtained by parsing the GroupID field, the N _STS field, and the receiving address field in the MAC frame header is as follows: The number of the MU-MIMO packet for this MU-MIMO transmission is GroupID= l, the MU-MIMO packet is identified by the STA at the fourth position in the group, and the STA is H, and then according to the received MU-MIMO packet information of GroupID=1, it is in GroupID=l There are four MU-MIMO packets: (DEBC), (HCBE), (EDBG), (GHEB), where there are two packets containing H: (HCBE), (GHEB), but in these two groups, There is no H group in the fourth position in the group, so E can determine that this MU-MIMO transmission is not 40 pairs of MU-MIMO packets in its own place; if E holds all packets under GroupID=l, then it can also pass H The information at the fourth position in the packet determines that the 40-pair packet of the MU-MIMO transmission is (BACH). After receiving the RTS frame, the rest of the STAs are treated similarly to E. Referring to FIG. 8, a block diagram of an access point according to Embodiment 8 of the present invention is shown, including: a notification module 802, configured to send packet identification information to a station, where the group identification information is used to uniquely identify the same MU. One MU-MIMO packet in the MIMO group, the same MU-MIMO group including one or more MU-MIMO packets. Preferably, the packet identification information includes an identifier of a station STA capable of uniquely identifying the MU-MIMO packet in the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs. Preferably, the notification module 802 includes: an RTS frame notification module 8022, configured to send to the station

The RTS frame, where the N _STS field in the RTS frame carries the relative location information or the index number information of the STA, and the receiving address field in the MAC frame header of the RTS frame carries the identifier of the STA. Preferably, the identifier of the STA is the MAC address of the STA. Preferably, the STA identifying the MU-MIMO packet is an STA having data transmission in the MU-MIMO packet. Preferably, the RTS frame notification module 8022 is configured to set all the bits of the data stream of one STA in the N _STS domain of the RTS frame to 1 to indicate that the STA is an STA that identifies the MU-MIMO packet, and send an RTS frame to the station. . Preferably, the RTS frame notification module 8022 is configured to set all the bits of the data stream of the other STAs other than the STAs identifying the MU-MIMO packet in the N _STS domain of the RTS frame to send the RTS frame to the point. . Preferably, the RTS frame notification module 8022 is configured to set the bit of the data stream of the other STAs according to the actual data stream of each STA, except for the STA that identifies the MU-MIMO packet in the N _STS domain of the RTS frame, to the site. Send an RTS frame. Preferably, when the same MU-MIMO group includes a plurality of MU-MIMO packets, at least one of the plurality of MU-MIMO packets has a relative position different from that of the other packets except the packet. Relative position. Preferably, the group identification information further includes group identifier GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs. Referring to FIG. 9, a structural block diagram of a station according to Embodiment 9 of the present invention is shown, including: a receiving module 902, configured to receive packet identification information sent by an access point, where the group identification information is used to uniquely identify the same MU. - one MU-MIMO packet of the MIMO group, the same MU-MIMO group including one or more MU-MIMO packets; an acquisition module 904, configured to acquire one MU-MIMO of the same MU-MIMO group according to the packet identification information Grouped information. Preferably, the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs. Preferably, the receiving module 902 includes: an RTS frame receiving module 9022, configured to receive an RTS frame sent by the access point, where the N _STS field in the RTS frame carries relative location information or index number information of the STA that identifies the MU-MIMO packet. The receiving address field in the MAC frame header of the RTS frame carries the identifier of the STA that identifies the MU-MIMO packet. Preferably, the identifier of the STA is the MAC address of the STA. Preferably, the RTS frame further includes GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs. Preferably, the obtaining module 904 includes an RTS frame obtaining module 9042, configured to set, according to GroupID information in the RTS frame, relative location information or index number information of the STA that identifies the MU-MIMO packet, and identifier of the STA that identifies the MU-MIMO packet. Obtain information of one MU-MIMO packet of the same MU-MIMO group. Preferably, the RTS frame obtaining module 9042 is configured to: in the MU-MIMO group indicated by the GroupID information, look up the location indicated by the relative location information or the index number information, and the STA whose identifier is consistent with the STA identifier in the RTS frame belongs to The MU-MIMO packet acquires information of the MU-MIMO packet. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed 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 and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for identifying a multi-user group, comprising:

The access point sends packet identification information to the station STA, where the packet identification information is used to uniquely identify one MU-MIMO packet of the same MU-MIMO group, and the same MU-MIMO group includes one or more of the MU- MIMO packet.

2. The method according to claim 1, wherein the packet identification information includes an identifier of one STA of the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and the STA to which the STA belongs Relative position information or index number information in the MU-MIMO packet.

The method according to claim 2, wherein the step of the access point sending the packet identification information to the station STA comprises:

The access point sends a transmission reservation RTS frame to the STA, where the data flow in the RTS frame indicates that the N _STS domain carries relative location information or index number information of the STA, and the media access control MAC of the RTS frame The receiving address field in the frame header carries the identifier of the STA.

The method according to claim 2 or 3, wherein the identifier of the STA is a MAC address of the STA.

5. The method of claim 4, wherein the STA identifying the MU-MIMO packet is a STA having data transmission in the MU-MIMO packet.

The method according to claim 3, wherein the step of the access point sending the sending of the predetermined RTS frame to the STA comprises:

The access point sets all the data stream bits of the STA in the N _STS domain of the RTS frame to 1 to indicate that the STA is an STA that identifies the MU-MIMO packet; and sends the STA to the STA. Said RTS frame.

The method according to claim 3, wherein the step of the access point sending the sending reservation RTS frame to the STA comprises: The access point sets all data stream bits of other STAs other than the STA that identifies the MU-MIMO packet to 0 in the N _STS domain of the RTS frame, and sends the data to the STA. RTS frame.

The access point sets, in the N _STS domain of the RTS frame, the data stream bits of other STAs other than the STA that identifies the MU-MIMO packet according to the actual data flow of each STA, to the The STA transmits the RTS frame.

9. The method according to claim 1, wherein, when the same MU-MIMO group includes a plurality of the MU-MIMO packets, at least one of each of the plurality of MU-MIMO packets The relative position of the STA is different from its relative position in other packets than the packet.

The method according to any one of claims 1 to 3, wherein the group identification information further includes group identification GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.

11. A multi-user packet acquisition method, comprising:

The station STA receives the packet identification information sent by the access point, where the packet identification information is used to uniquely identify one MU-MIMO packet of the same MU-MIMO group, and the same MU-MIMO group includes one or more of the MUs. - MIMO packet;

And acquiring information of one MU-MIMO packet of the same MU-MIMO group according to the packet identification information.

12. The method according to claim 11, wherein the packet identification information includes an identifier of one STA of the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and the STA to which the STA belongs Relative position information or index number information in the MU-MIMO packet.

The method according to claim 12, wherein the step of the station STA receiving the packet identification information sent by the access point comprises:

Receiving, by the STA, a transmission reservation RTS frame sent by the access point, where the data flow in the RTS frame indicates that an N _STS domain carries a relative bit of an STA that identifies the MU-MIMO packet. The information or index number information, the receiving address field in the media access control MAC frame header of the RTS frame carries an identifier of the STA that identifies the MU-MIMO packet.

14. The method of claim 13, wherein the RTS frame further comprises: group identity GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.

The method according to claim 14, wherein the step of the station STA acquiring information of one MU-MIMO packet of the same MU-MIMO group according to the packet identification information includes:

Determining, by the STA, the GroupID information in the RTS frame, the relative location information or index number information of the STA that identifies the MU-MIMO packet, and the identifier of the STA that identifies the MU-MIMO packet, Obtaining information of one MU-MIMO packet of the same MU-MIMO group.

The method according to claim 15, wherein the STA is configured according to the GroupID information in the RTS frame, the relative location information of the STA that identifies the MU-MIMO packet, or index number information, Identifying an identifier of the STA of the MU-MIMO packet, and acquiring the information of the information of one MU-MIMO packet of the same MU-MIMO group includes:

The STA, in the MU-MIMO group indicated by the GroupID information, searches for the STA that is in the position indicated by the relative location information or the index number information, and whose identifier is consistent with the STA identifier in the RTS frame. The MU-MIMO packet acquires information of the MU-MIMO packet.

The method according to any one of claims 12 to 16, wherein the identifier of the STA is a MAC address of the STA.

18. An access point, including:

a notification module, configured to send, to the station STA, packet identification information, where the packet identification information is used to uniquely identify one MU-MIMO packet of the same MU-MIMO group, where the same MU-MIMO group includes one or more of the foregoing MU-MIMO packet.

19. The access point according to claim 18, wherein the packet identification information comprises an identifier of one STA of the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and the STA to which the STA belongs Relative position information or index number information in the MU-MIMO packet.

The access point according to claim 19, wherein the notification module comprises:

The RTS frame notification module is configured to send a transmission reservation RTS frame to the STA, where the data flow in the RTS frame indicates that the N _STS domain carries relative location information or index number information of the STA, and the media access of the RTS frame The receiving address field in the control MAC frame header carries the identifier of the STA.

The access point according to claim 20, wherein the identifier of the STA is a MAC address of the STA.

22. The access point according to claim 18, wherein, when the same MU-MIMO group includes a plurality of the MU-MIMO packets, each of the plurality of MU-MIMO packets is in a packet The relative position of at least one STA is different from its relative position in other packets than the packet.

The access point according to any one of claims 18 to 22, wherein the group identification information further includes group identification GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.

24. A site STA, comprising:

a receiving module, configured to receive packet identification information sent by the access point, where the packet identification information is used to uniquely identify one MU-MIMO packet of the same MU-MIMO group, where the same MU-MIMO group includes one or more The MU-MIMO packet;

And an obtaining module, configured to acquire information of one MU-MIMO packet of the same MU-MIMO group according to the packet identification information.

25. The STA according to claim 24, wherein the packet identification information includes an identifier of one of the MU-MIMO packets capable of uniquely identifying the MU-MIMO packet, and the STA to which the STA belongs Relative position information or index number information in the MU-MIMO packet.

The STA according to claim 25, wherein the receiving module comprises:

The RTS frame receiving module is configured to receive a sending reservation RTS frame sent by the access point, where the data stream in the RTS frame indicates that the N _STS domain carries relative location information or an index number of the STA that identifies the MU-MIMO packet. Information, the received address field in the Media Access Control MAC header of the RTS frame carries an identifier of the STA that identifies the MU-MIMO packet.

27. The STA according to claim 26, wherein the RTS frame further comprises: group identity GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.

The STA according to claim 27, wherein the acquiring module comprises:

An RTS frame obtaining module, configured to determine, according to the GroupID information in the RTS frame, the relative location information or index number information of the STA that identifies the MU-MIMO packet, and the identifier of the MU-MIMO packet The identifier of the STA, which acquires information of one MU-MIMO packet of the same MU-MIMO group.

The STA according to claim 28, wherein the RTS frame obtaining module is configured to search for the location indicated by the relative location information or index number information in the MU-MIMO group indicated by the GroupID information. The MU-MIMO packet to which the STA whose identifier matches the STA identifier in the RTS frame belongs, acquires information of the MU-MIMO packet.

The STA according to any one of claims 25 to 29, wherein the identifier of the STA is a MAC address of the STA.