CN107079519B

CN107079519B - Network equipment, terminal and data transmission method

Info

Publication number: CN107079519B
Application number: CN201480082421.1A
Authority: CN
Inventors: 杨讯
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-10-31
Filing date: 2014-10-31
Publication date: 2020-01-21
Anticipated expiration: 2034-10-31
Also published as: CN111212012B; CN111212012A; WO2016065629A1; CN107079519A

Abstract

The invention relates to the technical field of communication, in particular to network equipment, a terminal and a data transmission method, which are used for solving the problem that the capacity of the existing signaling information field can not meet the communication requirements of a plurality of terminals when the network equipment is communicated with the plurality of terminals. In a network device, a first sending unit sends packet information to a plurality of terminals scheduled by the network device, wherein the packet information comprises a terminal identification sequence which comprises terminal identifications of the plurality of terminals arranged in sequence; and the second sending unit sends a data frame, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal, and the target receiving terminal information is the sequence of the terminal identifier of the target receiving terminal in the terminal identifier sequence. The terminal is identified through the sequence information of the terminal, so that the terminal identification occupying more information bits is avoided, and the capacity of the existing signaling information field can meet the communication requirements of a plurality of terminals.

Description

Network equipment, terminal and data transmission method

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a network device, a terminal, and a data transmission method.

Background

Orthogonal Frequency Division Multiplexing (OFDM) is a basic communication transmission method, and is widely used for wireless transmission in wireless communication systems such as Long Term Evolution (LTE), Worldwide Interoperability for Microwave Access (WiMAX), and wireless fidelity (Wifi); and may be used for wired transmission such as optical fiber, copper strands, cables, etc.

The basic principle of the OFDM is to compress the subcarrier intervals to the minimum within an allowable range by utilizing the orthogonality of the subcarriers, form multiple paths of parallel paths without mutual interference and improve the frequency utilization efficiency of a system. When OFDM subcarriers, which do not interfere with each other, are allocated to a plurality of users, it is possible to implement multi-user Access or data transmission, that is, Orthogonal Frequency Division Multiple Access (OFDMA), using OFDM.

In a Wireless Local Access Network (WLAN), data transmission is performed in units of frames (frames). The header of each frame generally indicates the related information of the frame, such as: modulation and Coding Scheme (MCS), frame length, bandwidth, and other basic information. Through the indication of the frame header, the receiving end can accurately configure the parameters of the physical layer for demodulation and decoding. Typically this information is located in the physical layer Signaling (SIG) of each frame. In the frame of ieee802.11ac shown in fig. 1, the above information is located in the physical layer signaling VHT-SIG-a.

In order to support OFDMA in WLAN, an Access Point (AP) needs to indicate the resource used by a STAtion (STA) as early as possible, and one possible method is to carry the resource information of the resource used by the STA by the above information, and place it in a field similar to VHT-SIG-a. To distinguish from the VHT-SIG-a, a field containing resource information of the STA use resources is referred to as NG-SIG-a.

As can be seen from fig. 1, the VHT-SIG-a field is only 8 μ s in length (may comprise two OFDM symbols, for a total of 48 bits), and similarly the number of information bits that NG-SIG-a can transmit is very limited. When OFDMA is supported in a WLAN, it may be necessary to communicate with multiple STAs simultaneously, so at least the STA identity and resource information for using resources for each STA need to be carried in NG-SIG-a. If the MAC address is used as the STA identification, the MAC address of one STA occupies 48 bits, if 16 STAs are scheduled to transmit simultaneously, 768 bits need to be occupied by the STA identification, and the capacity of the NG-SIG-A field cannot meet the information transmission requirement.

In summary, when OFDMA is applied in the WLAN system, when an AP communicates with multiple STAs, the capacity of the existing signaling information field cannot meet the requirement of multiple STAs for transmission.

Disclosure of Invention

The embodiment of the invention provides network equipment, a terminal and a data transmission method, which are used for solving the problem that the capacity of the existing signaling information field cannot meet the communication requirements of a plurality of terminals when the network equipment is communicated with the plurality of terminals in a communication system.

In a first aspect, an embodiment of the present invention provides a network device, including:

a first sending unit, configured to send packet information to a plurality of terminals scheduled by the network device, where the packet information includes a terminal identifier sequence, and the terminal identifier sequence includes terminal identifiers of the plurality of terminals arranged in sequence;

a second sending unit, configured to send a data frame, where the data frame carries target receiving terminal information used for indicating a target receiving terminal, and the target receiving terminal information is an order of a terminal identifier of the target receiving terminal in the terminal identifier sequence.

With reference to the first aspect, in a first possible implementation manner, the grouping information specifically includes: the unit channel identifier of each unit channel used by the plurality of terminals and the terminal identifier sequence of each terminal corresponding to each unit channel identifier and using the unit channel identified by the unit channel identifier are sequentially arranged;

the second sending unit is specifically configured to: sending the data frame to the target receiving terminal on a target unit channel, wherein the target unit channel is a unit channel used by the target receiving terminal;

the target receiving terminal information specifically includes: in the grouping information, the terminal identifier of the target receiving terminal is in the order of the terminal identifier sequence corresponding to the unit channel identifier of the target unit channel.

With reference to the first aspect, in a second possible implementation manner, data transmission is performed between the network device and the multiple terminals in a multi-user multiple-input multiple-output (MU-MIMO) manner, where the multiple terminals belong to at least one MU-MIMO group, and the terminal identification sequence includes MU-MIMO group identifications of MU-MIMO groups to which the multiple terminals belong, which are sequentially arranged;

the second sending unit is specifically configured to: and sending the data frame to each terminal in a target MU-MIMO group, wherein the data in the data frame is placed according to an order pre-agreed by the network device and each terminal in the target MU-MIMO group, and the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

With reference to the first aspect, in a third possible implementation manner, the network device performs data transmission with the multiple terminals in an MU-MIMO manner, where the multiple terminals belong to N MU-MIMO groups, each MU-MIMO group in the first N-1 MU-MIMO groups includes K terminals in the multiple terminals, an nth MU-MIMO group includes M terminals in the multiple terminals, and a total number of the multiple terminals is K (N-1) + M; in the grouping information, in the terminal identification sequences of the multiple terminals, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to an nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

the target receiving terminal information specifically includes: in the grouping information, the order of the terminal identification of the first terminal in the target MU-MIMO group in the terminal identification sequence; or the sequence number of a target MU-MIMO group in the N MU-MIMO groups, wherein the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs;

the second sending unit is specifically configured to: and sending the data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the order pre-agreed by the network equipment and each terminal in the target MU-MIMO group.

With reference to the first aspect, the first possible implementation manner of the first aspect, the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, in a fourth possible implementation manner, the target receiving terminal information is located in a physical layer signaling SIG of the data frame.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the SIG of the data frame further includes resource information of a physical layer resource allocated to the target receiving terminal.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the network device and the multiple terminals perform data transmission in an orthogonal frequency division multiple access, OFDMA, manner, and the resource information includes: information of OFDMA subchannels.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the network device and the multiple terminals perform data transmission in an MU-MIMO manner, and the resource information includes: space-time stream information.

With reference to the first aspect, or any one of the first possible implementation manner to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, the first sending unit is further configured to:

and under the control of the processing unit, sending the information of the effective duration of the grouping information to the plurality of terminals.

With reference to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner, the first sending unit is specifically configured to:

and carrying the information of the effective Duration through a special field or a Duration field in the data frame.

In a second aspect, an embodiment of the present invention provides a network device, including:

a first sending unit, configured to send packet information to a plurality of terminals scheduled by the network device, where the packet information includes: the network equipment divides the plurality of terminals into a group identifier of each group of a plurality of groups and comprises a terminal identifier sequence corresponding to each group identifier, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

a second sending unit, configured to send a data frame, where the data frame carries a target packet identifier and target receiving terminal information used to indicate a target receiving terminal;

wherein, the target grouping identifier is the grouping identifier of the grouping to which the target receiving terminal belongs, and the target receiving terminal information is: in the grouping information, the terminal identifier of the target receiving terminal is in an order in the terminal identifier sequence corresponding to the grouping identifier of the group to which the target receiving terminal belongs.

With reference to the second aspect, in a first possible implementation manner, in the plurality of groups, the terminals in each group use at least one unit channel, and each terminal using one unit channel belongs to at least one group; the grouping information specifically includes: a group identifier of each group, a unit channel identifier of each unit channel used by each terminal included in the group identified by the group identifier corresponding to each group identifier, and a terminal identifier sequence of each terminal using the unit channel identified by the unit channel identifier in the group identified by the group identifier arranged in sequence corresponding to each unit channel identifier corresponding to each group identifier;

the target receiving terminal information specifically includes: in the grouping information, the terminal identifier of the target receiving terminal is the order in the terminal identifier sequence corresponding to the unit channel identifier of the target unit channel used by the target receiving terminal in the grouping to which the target receiving terminal belongs;

the second sending unit is specifically configured to: and sending the data frame to the target receiving terminal on the target unit channel.

With reference to the second aspect, in a second possible implementation manner, the network device performs data transmission with the multiple terminals in an MU-MIMO manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group, and the terminal identification sequence includes, in order, MU-MIMO group identifications of MU-MIMO groups to which each terminal in the group identified by the group identification belongs, corresponding to each group identification;

the second sending unit is specifically configured to: and sending the data frame to each terminal in a target MU-MIMO group, wherein the data in the data frame is placed according to an order pre-agreed by the network device and each terminal in the target MU-MIMO group, and the MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

With reference to the second aspect, in a third possible implementation manner, the network device performs data transmission with the multiple terminals in an MU-MIMO manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group;

for any one of the plurality of groups, if the terminal in the group belongs to N MU-MIMO groups, each of the first N-1 MU-MIMO groups includes K terminals in the group, the nth MU-MIMO group includes M terminals in the group, and the group has K (N-1) + M terminals in total, then, in the sequence of terminal identifications of the terminals belonging to the group, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to the nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

the target receiving terminal information specifically includes: in the grouping information, the terminal identification of the first terminal in the target MU-MIMO group is in the order of the terminal identification sequence corresponding to the grouping identification of the group to which the target MU-MIMO group belongs; or the sequence number of a target MU-MIMO group in each MU-MIMO group in the group to which the target MU-MIMO group belongs, wherein the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs;

With reference to the second aspect, the first possible implementation manner of the second aspect, the second possible implementation manner of the second aspect, or the third possible implementation manner of the second aspect, in a fourth possible implementation manner, the target receiving terminal information is located in a physical layer signaling SIG of the data frame.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the SIG of the data frame further includes resource information of a physical layer resource allocated to the target receiving terminal.

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner, the network device and the multiple terminals perform data transmission by using an orthogonal frequency division multiple access, OFDMA, scheme, and the resource information includes: information of OFDMA subchannels.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner, the network device and the multiple terminals perform data transmission in an MU-MIMO manner, and the resource information includes: space-time stream information.

With reference to the second aspect, or any one of the first possible implementation manner to the seventh possible implementation manner of the second aspect, in an eighth possible implementation manner, the first sending unit is further configured to:

With reference to the eighth possible implementation manner of the second aspect, in a ninth possible implementation manner, the first sending unit is specifically configured to:

In a third aspect, an embodiment of the present invention provides a terminal, including:

a receiving unit, configured to receive packet information sent by a network device, where the packet information includes a terminal identifier sequence, and the terminal identifier sequence includes terminal identifiers of multiple terminals scheduled by the network device and arranged in sequence;

a processing unit, configured to determine current terminal information, where the current terminal information is an order of terminal identifiers of the terminals in the group information in the terminal identifier sequence;

the receiving unit is further configured to: receiving a data frame sent by the network device, where the data frame carries target receiving terminal information used for indicating a target receiving terminal to which the data frame is sent, where the target receiving terminal information is an order of terminal identifiers of the target receiving terminals in the group information in the terminal identifier sequence;

the processing unit is further to: and if the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the terminal, and acquiring the data sent to the terminal from the data frame.

With reference to the third aspect, in a first possible implementation manner, the grouping information specifically includes: the unit channel identifier of each unit channel used by the plurality of terminals and the terminal identifier sequence of each terminal corresponding to each unit channel identifier and using the unit channel identified by the unit channel identifier are sequentially arranged;

the receiving unit is specifically configured to: receiving the data frame sent by the network equipment on a current unit channel used by the terminal;

the target receiving terminal information specifically includes: in the grouping information, the terminal identifier of the target receiving terminal is in an order in the terminal identifier sequence corresponding to the unit channel identifier of the unit channel used by the target receiving terminal.

With reference to the third aspect, in a second possible implementation manner, the network device performs data transmission with the multiple terminals in a multi-user multiple-input multiple-output (MU-MIMO) manner, where the multiple terminals belong to at least one MU-MIMO group, and the terminal identification sequence includes sequentially arranged MU-MIMO group identifications of MU-MIMO groups to which the multiple terminals belong;

the data frame is sent to each terminal in a target MU-MIMO group by the network device, the data in the data frame is placed according to a predetermined sequence between the network device and each terminal in the target MU-MIMO group, and the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs;

the processing unit is specifically configured to: and if the data frame is determined to contain the data sent to the terminal, acquiring the data sent to the terminal from the data frame according to the sequence agreed in advance by the network equipment and the terminal after the receiving unit receives the data frame.

With reference to the third aspect, in a third possible implementation manner, the network device performs data transmission with the multiple terminals in an MU-MIMO manner, where the multiple terminals belong to N MU-MIMO groups, each MU-MIMO group in the first N-1 MU-MIMO groups includes K terminals in the multiple terminals, an nth MU-MIMO group includes M terminals in the multiple terminals, and a total number of the multiple terminals is K (N-1) + M; in the grouping information, in the terminal identification sequences of the multiple terminals, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to an nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

the data frame is sent to each terminal in the target MU-MIMO group by the network device, and the data in the data frame is placed according to a predetermined sequence between the network device and each terminal in the target MU-MIMO group;

the processing unit is specifically configured to: and if the data frame is determined to contain the data sent to the terminal, acquiring the data sent to the terminal from the data frame according to the sequence agreed by the network equipment and the terminal in advance after the receiving unit receives the data frame.

With reference to the third aspect, the first possible implementation manner of the third aspect, the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, in a fourth possible implementation manner, the target receiving terminal information is located in a physical layer signaling SIG of the data frame.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner, the SIG of the data frame further includes resource information of a physical layer resource allocated to the target receiving terminal.

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner, the network device and the multiple terminals perform data transmission by using an orthogonal frequency division multiple access OFDMA scheme, and the resource information includes: information of OFDMA subchannels.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner, the network device performs data transmission with the multiple terminals in an MU-MIMO manner, and the resource information includes: space-time stream information.

With reference to the third aspect, or any one of the first possible implementation manner to the seventh possible implementation manner of the third aspect, in an eighth possible implementation manner, the receiving unit is further configured to:

and receiving the effective duration information of the grouping information sent by the network equipment.

With reference to the eighth possible implementation manner of the third aspect, in a ninth possible implementation manner, the receiving unit is specifically configured to:

and receiving the effective Duration information carried by the network equipment through a special field or a Duration field in a data frame.

In a fourth aspect, an embodiment of the present invention provides a terminal, including:

a receiving unit, configured to receive packet information sent by a network device, where the packet information includes: the network equipment divides a plurality of scheduled terminals into a group identifier of each group of a plurality of groups and comprises a terminal identifier sequence corresponding to each group identifier, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

the processing unit is used for determining the current grouping identification and the current terminal information; wherein the current group identification is: in the grouping information, a grouping identifier corresponding to a terminal identifier of the terminal; the current terminal information is: in the grouping information, the order of the terminal identifier of the terminal in the terminal identifier sequence corresponding to the current grouping identifier;

the receiving unit is further configured to: receiving a data frame sent by the network equipment, wherein the data frame carries a target grouping identifier and target receiving terminal information; the target group identifier is a group identifier of a group to which a target receiving terminal sent by the data frame belongs; the target receiving terminal information is the sequence of the terminal identification of the target receiving terminal in the terminal identification sequence corresponding to the group identification of the group to which the target receiving terminal belongs;

the processing unit is further to: and if the current grouping identification is the same as the target grouping identification and the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the terminal, and acquiring the data sent to the terminal from the data frame.

With reference to the fourth aspect, in a first possible implementation manner, in the plurality of groups, the terminals in each group use at least one unit channel, and each terminal using one unit channel belongs to at least one group; the grouping information specifically includes: a group identifier of each group, a unit channel identifier of each unit channel used by each terminal included in the group identified by the group identifier corresponding to each group identifier, and a terminal identifier sequence of each terminal using the unit channel identified by the unit channel identifier in the group identified by the group identifier arranged in sequence corresponding to each unit channel identifier corresponding to each group identifier;

the receiving unit is specifically configured to: and receiving the data frame sent by the network equipment on the current unit channel used by the terminal.

With reference to the fourth aspect, in a second possible implementation manner, the network device performs data transmission with the multiple terminals in a multi-user multiple-input multiple-output (MU-MIMO) manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group, and the terminal identifier sequence includes, in order, MU-MIMO group identifiers of MU-MIMO groups to which each terminal in the group identified by the group identifier belongs;

the processing unit is specifically configured to: and if the data frame is determined to contain the data sent to the terminal, acquiring the data sent to the terminal from the data frame according to the sequence agreed by the network equipment and the terminal in advance after the data frame is received.

With reference to the fourth aspect, in a third possible implementation manner, the network device performs data transmission with the multiple terminals in an MU-MIMO manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group;

for any one of the plurality of groups, if the terminal in the group belongs to N MU-MIMO groups, each of the first N-1 MU-MIMO groups includes K terminals in the group, the nth MU-MIMO group includes M terminals in the group, and the group has K (N-1) + M terminals in total, then in the sequence of terminal identifications of the terminals belonging to the group, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to the nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, the second possible implementation manner of the fourth aspect, or the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the target receiving terminal information is located in a physical layer signaling SIG of the data frame.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the SIG of the data frame further includes resource information of a physical layer resource allocated to the target receiving terminal.

With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner, the network device and the multiple terminals perform data transmission by using an orthogonal frequency division multiple access OFDMA scheme, and the resource information includes: information of OFDMA subchannels.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner, the network device and the multiple terminals perform data transmission in a MU-MIMO manner, and the resource information includes: space-time stream information.

With reference to the fourth aspect, or any one of the first possible implementation manner to the seventh possible implementation manner of the fourth aspect, in an eighth possible implementation manner, the receiving unit is further configured to: and receiving the effective duration information of the grouping information sent by the network equipment.

With reference to the eighth possible implementation manner of the fourth aspect, in a ninth possible implementation manner, the receiving unit is specifically configured to: and receiving the effective Duration information carried by the network equipment through a special field or a Duration field in a data frame.

In a fifth aspect, an embodiment of the present invention provides a data transmission method, including:

sending grouping information to a plurality of terminals scheduled by current network equipment, wherein the grouping information comprises a terminal identification sequence which comprises terminal identifications of the plurality of terminals arranged in sequence;

and sending a data frame, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal, and the target receiving terminal information is the sequence of the terminal identification of the target receiving terminal in the terminal identification sequence.

With reference to the fifth aspect, in a first possible implementation manner, the grouping information specifically includes: the unit channel identifier of each unit channel used by the plurality of terminals and the terminal identifier sequence of each terminal corresponding to each unit channel identifier and using the unit channel identified by the unit channel identifier are sequentially arranged;

transmitting the data frame, including: sending the data frame to the target receiving terminal on a target unit channel, wherein the target unit channel is a unit channel used by the target receiving terminal;

With reference to the fifth aspect, in a second possible implementation manner, data transmission is performed between the current network device and the multiple terminals in a multi-user multiple-input multiple-output (MU-MIMO) manner, the multiple terminals belong to at least one MU-MIMO group, and the terminal identification sequence includes MU-MIMO group identifications of MU-MIMO groups to which the multiple terminals belong, which are sequentially arranged;

transmitting the data frame, including: and sending the data frame to each terminal in a target MU-MIMO group, wherein the data in the data frame is placed according to a predetermined sequence between the current network device and each terminal in the target MU-MIMO group, and the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

With reference to the fifth aspect, in a third possible implementation manner, the current network device performs data transmission with the multiple terminals in an MU-MIMO manner, where the multiple terminals belong to N MU-MIMO groups, each MU-MIMO group in the first N-1 MU-MIMO groups includes K terminals in the multiple terminals, an nth MU-MIMO group includes M terminals in the multiple terminals, and a total number of the multiple terminals is K (N-1) + M; in the grouping information, in the terminal identification sequences of the multiple terminals, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to an nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

transmitting the data frame, including: and sending the data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the order pre-agreed by the current network equipment and each terminal in the target MU-MIMO group.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, the second possible implementation manner of the fifth aspect, or the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the target receiving terminal information is located in a physical layer signaling SIG of the data frame.

With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner, the SIG of the data frame further includes resource information of a physical layer resource allocated to the target receiving terminal.

With reference to the fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner, the current network device and the multiple terminals perform data transmission in an orthogonal frequency division multiple access, OFDMA, manner, and the resource information includes: information of OFDMA subchannels.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the fifth aspect, in a seventh possible implementation manner, the current network device performs data transmission with the multiple terminals in an MU-MIMO manner, where the resource information includes: space-time stream information.

With reference to the fifth aspect or any one of the first possible implementation manner to the seventh possible implementation manner of the fifth aspect, in an eighth possible implementation manner, the method further includes:

and sending the information of the effective duration of the grouping information to the plurality of terminals.

With reference to the eighth possible implementation manner of the fifth aspect, in a ninth possible implementation manner, the information of the valid Duration is carried by a dedicated field or a Duration field in a data frame.

In a sixth aspect, an embodiment of the present invention provides a data transmission method, including:

sending packet information to a plurality of terminals scheduled by current network equipment, wherein the packet information comprises: the current network equipment divides the plurality of terminals into a group identifier of each group of a plurality of groups, and comprises a terminal identifier sequence corresponding to each group identifier, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

sending a data frame, wherein the data frame carries a target grouping identifier and target receiving terminal information used for indicating a target receiving terminal;

With reference to the sixth aspect, in a first possible implementation manner, in the plurality of groups, the terminals in each group use at least one unit channel, and each terminal using one unit channel belongs to at least one group; the grouping information specifically includes: a group identifier of each group, a unit channel identifier of each unit channel used by each terminal included in the group identified by the group identifier corresponding to each group identifier, and a terminal identifier sequence of each terminal using the unit channel identified by the unit channel identifier in the group identified by the group identifier arranged in sequence corresponding to each unit channel identifier corresponding to each group identifier;

transmitting the data frame, including: and sending the data frame to the target receiving terminal on the target unit channel.

With reference to the sixth aspect, in a second possible implementation manner, the current network device performs data transmission with the multiple terminals in an MU-MIMO manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group, and the terminal identification sequence includes, in order, MU-MIMO group identifications of MU-MIMO groups to which each terminal in the group identified by the group identification belongs, corresponding to each group identification;

transmitting the data frame, including: and sending the data frame to each terminal in a target MU-MIMO group, wherein the data in the data frame is placed according to the preset sequence of the current network device and each terminal in the target MU-MIMO group, and the MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

With reference to the sixth aspect, in a third possible implementation manner, the current network device performs data transmission with the multiple terminals in an MU-MIMO manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group;

sending a data frame to the target receiving terminal, including: and sending the data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the order pre-agreed by the network equipment and each terminal in the target MU-MIMO group.

With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, the second possible implementation manner of the sixth aspect, or the third possible implementation manner of the sixth aspect, in a fourth possible implementation manner, the target receiving terminal information is located in a physical layer signaling SIG of the data frame.

With reference to the fourth possible implementation manner of the sixth aspect, in a fifth possible implementation manner, the SIG of the data frame further includes resource information of a physical layer resource allocated to the target receiving terminal.

With reference to the fifth possible implementation manner of the sixth aspect, in a sixth possible implementation manner, the current network device and the multiple terminals perform data transmission in an orthogonal frequency division multiple access, OFDMA, manner, and the resource information includes: information of OFDMA subchannels.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the sixth aspect, in a seventh possible implementation manner, the current network device and the multiple terminals perform data transmission in an MU-MIMO manner, and the resource information includes: space-time stream information.

With reference to the sixth aspect or any one of the first possible implementation manner to the seventh possible implementation manner of the sixth aspect, in an eighth possible implementation manner, the method further includes:

With reference to the eighth possible implementation manner of the sixth aspect, in a ninth possible implementation manner, the information of the valid Duration is carried by a dedicated field or a Duration field in a data frame.

In a seventh aspect, an embodiment of the present invention provides a data transmission method, including:

receiving grouping information sent by network equipment, wherein the grouping information comprises a terminal identification sequence which comprises terminal identifications of a plurality of terminals scheduled by the network equipment in sequential arrangement;

determining current terminal information, wherein the current terminal information is the sequence of the terminal identifier of the current terminal in the terminal identifier sequence in the grouping information;

receiving a data frame sent by the network device, where the data frame carries target receiving terminal information used for indicating a target receiving terminal to which the data frame is sent, where the target receiving terminal information is an order of terminal identifiers of the target receiving terminals in the group information in the terminal identifier sequence;

and if the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the current terminal, and obtaining the data sent to the current terminal from the data frame.

With reference to the seventh aspect, in a first possible implementation manner, the grouping information specifically includes: the unit channel identifier of each unit channel used by the plurality of terminals and the terminal identifier sequence of each terminal corresponding to each unit channel identifier and using the unit channel identified by the unit channel identifier are sequentially arranged;

receiving a data frame sent by the network device, including: receiving the data frame sent by the network equipment on a current unit channel used by the current terminal;

With reference to the seventh aspect, in a second possible implementation manner, the network device performs data transmission with the multiple terminals in a multi-user multiple-input multiple-output (MU-MIMO) manner, where the multiple terminals belong to at least one MU-MIMO group, and the terminal identification sequence includes sequentially arranged MU-MIMO group identifications of MU-MIMO groups to which the multiple terminals belong;

acquiring data sent to the current terminal from the data frame, wherein the data acquisition comprises the following steps: and acquiring data sent to the current terminal from the data frame according to a sequence agreed by the network equipment and the current terminal in advance.

With reference to the seventh aspect, in a third possible implementation manner, the network device performs data transmission with the multiple terminals in an MU-MIMO manner, where the multiple terminals belong to N MU-MIMO groups, each MU-MIMO group in the first N-1 MU-MIMO groups includes K terminals in the multiple terminals, the nth MU-MIMO group includes M terminals in the multiple terminals, and the total number of the multiple terminals is K (N-1) + M; in the grouping information, in the terminal identification sequences of the multiple terminals, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to an nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

With reference to the seventh aspect, the first possible implementation manner of the seventh aspect, the second possible implementation manner of the seventh aspect, or the third possible implementation manner of the seventh aspect, in a fourth possible implementation manner, the target receiving terminal information is located in a physical layer signaling SIG of the data frame.

With reference to the fourth possible implementation manner of the seventh aspect, in a fifth possible implementation manner, the SIG of the data frame further includes resource information of a physical layer resource allocated to the target receiving terminal.

With reference to the fifth possible implementation manner of the seventh aspect, in a sixth possible implementation manner, the network device and the multiple terminals perform data transmission by using an orthogonal frequency division multiple access OFDMA scheme, and the resource information includes: information of OFDMA subchannels.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the seventh aspect, in a seventh possible implementation manner, the network device and the multiple terminals perform data transmission in an MU-MIMO manner, and the resource information includes: space-time stream information.

With reference to the seventh aspect, or any one of the first possible implementation manner to the seventh possible implementation manner of the seventh aspect, in an eighth possible implementation manner, the method further includes:

With reference to the eighth possible implementation manner of the seventh aspect, in a ninth possible implementation manner, the receiving information of the valid duration of the packet information sent by the network device includes:

In an eighth aspect, an embodiment of the present invention provides a data transmission method, including:

receiving packet information sent by a network device, wherein the packet information comprises: the network equipment divides a plurality of scheduled terminals into a group identifier of each group of a plurality of groups and comprises a terminal identifier sequence corresponding to each group identifier, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

determining a current grouping identifier and current terminal information; wherein the current group identification is: in the grouping information, a grouping identifier corresponding to a terminal identifier of a current terminal; the current terminal information is: in the grouping information, the order of the terminal identifier of the current terminal in the terminal identifier sequence corresponding to the current grouping identifier;

receiving a data frame sent by the network equipment, wherein the data frame carries a target grouping identifier and target receiving terminal information; the target group identifier is a group identifier of a group to which a target receiving terminal sent by the data frame belongs; the target receiving terminal information is the sequence of the terminal identification of the target receiving terminal in the terminal identification sequence corresponding to the group identification of the group to which the target receiving terminal belongs;

and if the current grouping identification is the same as the target grouping identification and the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the current terminal, and acquiring the data sent to the current terminal from the data frame.

With reference to the eighth aspect, in a first possible implementation manner, in the plurality of groups, the terminals in each group use at least one unit channel, and each terminal using one unit channel belongs to at least one group; the grouping information specifically includes: a group identifier of each group, a unit channel identifier of each unit channel used by each terminal included in the group identified by the group identifier corresponding to each group identifier, and a terminal identifier sequence of each terminal using the unit channel identified by the unit channel identifier in the group identified by the group identifier arranged in sequence corresponding to each unit channel identifier corresponding to each group identifier;

receiving a data frame sent by the network device, including: and receiving the data frame sent by the network equipment on the current unit channel used by the current terminal.

With reference to the eighth aspect, in a second possible implementation manner, the network device performs data transmission with the multiple terminals in a multi-user multiple-input multiple-output (MU-MIMO) manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group, and the terminal identifier sequence includes, in order, MU-MIMO group identifiers of MU-MIMO groups to which each terminal in the group identified by the group identifier belongs;

With reference to the eighth aspect, in a third possible implementation manner, the network device performs data transmission with the multiple terminals in an MU-MIMO manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group;

With reference to the eighth aspect, the first possible implementation manner of the eighth aspect, the second possible implementation manner of the eighth aspect, or the third possible implementation manner of the eighth aspect, in a fourth possible implementation manner, the target receiving terminal information is located in a physical layer signaling SIG of the data frame.

With reference to the fourth possible implementation manner of the eighth aspect, in a fifth possible implementation manner, the SIG of the data frame further includes resource information of a physical layer resource allocated to the target receiving terminal.

With reference to the fifth possible implementation manner of the eighth aspect, in a sixth possible implementation manner, the network device and the multiple terminals perform data transmission by using an orthogonal frequency division multiple access OFDMA scheme, and the resource information includes: information of OFDMA subchannels.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the eighth aspect, in a seventh possible implementation manner, the network device and the multiple terminals perform data transmission in an MU-MIMO manner, and the resource information includes: space-time stream information.

With reference to the eighth aspect, or any one of the first possible implementation manner to the seventh possible implementation manner of the eighth aspect, in an eighth possible implementation manner, the method further includes:

With reference to the eighth possible implementation manner of the eighth aspect, in a ninth possible implementation manner, the receiving information of the valid duration of the packet information sent by the network device includes:

In the embodiment of the invention, network equipment sends grouping information of dividing a plurality of terminals into one group or a plurality of groups to a plurality of scheduled terminals, and if the grouping information is divided into one group, the grouping information comprises terminal identification sequences of the plurality of terminals; if the packet information is divided into a plurality of packets, the packet information includes a packet identifier of each packet, and a terminal identifier sequence of each terminal included in the identified packet, corresponding to each packet identifier.

The network equipment sends a data frame to a target receiving terminal which communicates with the network equipment in a plurality of terminals, and sends target receiving terminal information which is used for indicating the sequence of terminal identification of the target receiving terminal in a terminal identification sequence in grouping information to the target receiving terminal if the data frame is divided into a group; if the data frame is divided into a plurality of groups, the target group identification and the target receiving terminal information are sent to the target receiving terminal, and the data frame of the target receiving terminal is indicated to be sent to the target receiving terminal; the target grouping identification is the grouping identification of the grouping which the target receiving terminal belongs to, the target receiving terminal information is in the grouping information, the terminal identification of the target receiving terminal is in the sequence of the terminal identification corresponding to the grouping identification of the grouping which the target receiving terminal belongs to.

Based on the scheme, the terminal is identified through the sequence information of the terminal, so that the terminal identification occupying more information bits is avoided, and the capacity of the existing signaling information field can meet the communication requirements of a plurality of terminals.

Drawings

FIG. 1 is a diagram of an IEEE802.11ac frame structure;

fig. 2 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention;

fig. 3a to fig. 3d are schematic diagrams illustrating packet information when a network device divides a plurality of scheduled terminals into one packet according to an embodiment of the present invention;

fig. 4a to fig. 4d are schematic diagrams illustrating packet information when a network device divides a plurality of scheduled terminals into a plurality of packets according to an embodiment of the present invention;

FIG. 5 is a flowchart of a method at the second AP side according to the embodiment of the invention;

FIG. 6 is a flowchart of a method of a second STA side according to an embodiment of the invention;

fig. 7 is a schematic diagram illustrating a manner of transmitting packet information and data frames between an AP and an STA according to a second embodiment of the present invention;

FIG. 8 is a diagram illustrating a mapping between packet information and a unit channel according to a third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a network device according to a fifth embodiment of the present invention;

fig. 10 is a schematic structural diagram of a network device according to a sixth embodiment of the present invention;

fig. 11 is a schematic structural diagram of a network device according to a seventh embodiment of the present invention;

fig. 12 is a schematic structural diagram of a network device according to an eighth embodiment of the present invention;

fig. 13 is a schematic structural diagram of a terminal according to a ninth embodiment of the present invention;

fig. 14 is a schematic structural diagram of a terminal according to a tenth embodiment of the present invention;

fig. 15 is a schematic structural diagram of a terminal according to an eleventh embodiment of the present invention;

fig. 16 is a schematic structural diagram of a terminal according to a twelfth embodiment of the present invention;

fig. 17 is a flowchart of a data transmission method according to a thirteenth embodiment of the present invention;

fig. 18 is a flowchart of a data transmission method according to a fourteenth embodiment of the present invention;

fig. 19 is a flowchart of a data transmission method according to a fifteenth embodiment of the present invention;

fig. 20 is a flowchart of a data transmission method according to a sixteenth embodiment of the present invention.

Detailed Description

In the network device provided in the embodiment of the present invention, the first sending unit is configured to send packet information to a plurality of terminals scheduled by the network device, where the packet information includes a terminal identifier sequence, and the terminal identifier sequence includes terminal identifiers of the plurality of terminals arranged in sequence; and the second sending unit is used for sending a data frame, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal, and the target receiving terminal information is the sequence of the terminal identifier of the target receiving terminal in the terminal identifier sequence.

The target receiving terminal data frame is indicated to be sent to the target receiving terminal by sending the target receiving terminal information for indicating the sequence of the terminal identifier of the target receiving terminal in the terminal identifier sequence in the pre-sent grouping information, so that the terminal identifier occupying more information bit is avoided, and the capacity of the existing signaling information field can meet the communication requirements of a plurality of terminals.

In another network device provided in the embodiment of the present invention, the first sending unit is configured to send packet information to a plurality of terminals scheduled by the network device, where the packet information includes: the network equipment divides the plurality of terminals into a group identifier of each group of a plurality of groups and comprises a terminal identifier sequence corresponding to each group identifier, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence; a second sending unit, configured to send a data frame, where the data frame carries a target packet identifier and target receiving terminal information used to indicate a target receiving terminal; wherein, the target grouping identifier is the grouping identifier of the grouping to which the target receiving terminal belongs, and the target receiving terminal information is: in the grouping information, the terminal identifier of the target receiving terminal is in an order in the terminal identifier sequence corresponding to the grouping identifier of the group to which the target receiving terminal belongs.

The data frame of the target receiving terminal is indicated to be sent to the target receiving terminal by sending the target grouping identification and the target receiving terminal information, so that the terminal identification occupying more information bit is avoided, and the capacity of the existing signaling information field can meet the communication requirements of a plurality of terminals.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, a data transmission system provided in an embodiment of the present invention is described in an embodiment one; then, the method of grouping the terminals and identifying the terminals is illustrated by the second embodiment and the third embodiment respectively; next, four network devices provided by the embodiment of the present invention are introduced through the fifth to eighth embodiments; then, the four terminals provided by the embodiment of the present invention are introduced through the ninth to twelfth embodiments, respectively; finally, four data transmission methods provided by the embodiments of the present invention are described by embodiments thirteen to sixteenth.

[ EXAMPLES one ]

Fig. 2 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention. As shown in fig. 2, the system includes: a network device 201 and a terminal 202;

wherein the network device 201 is configured to divide the scheduled plurality of terminals including the terminal 202 into one packet or a plurality of packets; in the following, two cases of distinguishing one packet from a plurality of packets are described separately:

1. one packet situation

The network device 201 is specifically configured to: sending grouping information to the plurality of terminals, wherein the grouping information comprises a terminal identification sequence which comprises the terminal identifications of the plurality of terminals arranged in sequence; sending a data frame, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal, and the target receiving terminal information is the sequence of a terminal identifier of the target receiving terminal in the terminal identifier sequence;

the terminal 202 is configured to: receiving the group information sent by the network device 201, and determining current terminal information, where the current terminal information is an order of terminal identifiers of the terminals 202 in the group information in the terminal identifier sequence; and receiving a data frame sent by the network device 201, if the current terminal information is the same as the target receiving terminal information carried in the data frame, determining that the data frame includes data sent to the terminal 202, and acquiring the data sent to the terminal 202 from the data frame.

The target receiving terminal information may be sent in a corresponding data frame, or may be sent independently of the data frame. When the target receiving terminal information is transmitted independently of the data frame, optionally, the target receiving terminal information may be transmitted before the data frame is transmitted, and the data frame corresponding to the target receiving terminal information is identified, such as: when the target receiving terminal information is sent, the frame number of the data frame corresponding to the target receiving terminal information is carried.

2. Multiple packet scenario

The network device 201 is specifically configured to: transmitting packet information including a packet identifier of each of a plurality of packets into which the plurality of terminals are divided by the network device 201 and a terminal identifier sequence including terminal identifier sequences of the terminals included in the packets identified by the packet identifiers arranged in order, to the scheduled plurality of terminals, corresponding to each of the packet identifiers; and sending a data frame, wherein the data frame carries a target group identifier, target receiving terminal information and target receiving terminal information for indicating a target receiving terminal, the target group identifier is a group identifier of a group to which the target receiving terminal belongs, and the target receiving terminal information is a terminal identifier of the target receiving terminal in the group information and an order in a terminal identifier sequence corresponding to the group identifier of the group to which the target receiving terminal belongs.

The terminal 202 is configured to: receiving the packet information sent by the network device 201; determining a current grouping identifier and current terminal information, wherein the current grouping identifier is as follows: in the above grouping information, the current terminal information is a grouping identifier corresponding to the terminal identifier of the terminal 202: in the grouping information, the order of the terminal identifier of the terminal 202 in the terminal identifier sequence corresponding to the current grouping identifier; receiving the data frame sent by the network device 201, if it is determined that the current packet identifier is the same as the target packet identifier carried in the data frame and the current terminal information is the same as the target receiving terminal information carried in the data frame, determining that the data frame includes data sent to the terminal 202, and acquiring the data sent to the terminal 202 from the data frame.

When the network device 201 performs data transmission with the plurality of terminals in the OFDMA scheme, the network device 201 divides the plurality of terminals into a plurality of groups, which are OFDMA groups.

The target group identifier and the target receiving terminal information may be sent in a corresponding data frame, or may be sent independently of the data frame. When transmitting independently of the data frame, optionally, the target group identifier and the target receiving terminal information may be transmitted before transmitting the data frame, and the data frame corresponding to the target group identifier and the target receiving terminal information may be identified, such as: when the target grouping identification and the target receiving terminal information are sent, the frame numbers of the data frames corresponding to the target grouping identification and the target receiving terminal information are carried.

Next, a case of one packet and a case of a plurality of packets are described, respectively. For both cases, there are several alternative implementations in actual implementation.

For clarity of description, several possible implementations of a group are listed in table 1 below, and several possible implementations of multiple groups are listed in table 2 below.

It should be noted that the specific implementation manner is not limited to the several manners listed in table 1 and table 2, and in fact, any method that can identify the terminal through the order of the terminal identifier of the terminal in the grouping information and make the terminal identify the data frame addressed to itself is applicable to the present invention.

TABLE 1 several possible implementations of a packet

TABLE 2 several possible implementations of multiple packets

In tables 1 and 2, and in the description of the other parts in the embodiments of the present invention, the target unit channel is a unit channel used by the target receiving terminal, and the target MU-MIMO group is a MU-MIMO group to which the target receiving terminal belongs.

Next, various implementations in table 1 and table 2 are described in detail.

1. One packet, implementation way one

In this embodiment, the packet information includes terminal identification sequences of a plurality of terminals scheduled by the network device 201. Such as: the grouping information may be as shown in fig. 3a, wherein STA _ ID _1, STA _ ID _2, STA _ ID _3, STA _ ID _4, STA _ ID _5, and STA _ ID _6 are terminal identification sequences of a plurality of terminals scheduled by the network device 201.

The target receiving terminal information is as follows: the order of the terminal identifier of the target receiving terminal in the terminal identifier sequence is, for example: in fig. 3a, the target receiving terminal information is the order of the terminal identifications of the target receiving terminal in the above-mentioned terminal identification sequences STA _ ID _1, STA _ ID _2, STA _ ID _3, STA _ ID _4, STA _ ID _5, and STA _ ID _ 6.

Such as: if the maximum number of terminals scheduled by the network device 201 is predetermined to be 8, 3 bits are required to indicate the sequence of the terminal id of the target receiving terminal in the terminal id sequence. For STA _ ID _3 in fig. 3a, the target receiving terminal information may be represented as "010", which indicates that, among the grouping information, STA _ ID _3 is ordered as 3 rd in the terminal identification sequence of each terminal (for STA _ ID _1 in fig. 3a, the target receiving terminal information may be represented as "000". since each terminal requires only 3 bits, 45 bits are saved compared to identifying the target receiving terminal with a MAC address of 48 bits.

Since the terminal 202 knows the sequence of the terminal identifier of itself in the terminal identifier sequence from the packet information in advance, after the terminal 202 receives the target receiving terminal information, if the current terminal information is the same as the target receiving terminal information, it is determined that the data frame includes the data addressed to itself.

2. One group, implementation mode two

In this embodiment, the grouping information specifically includes: the unit channel identification of each unit channel used by the plurality of terminals scheduled by the network apparatus 201, and a terminal identification sequence corresponding to each unit channel identification, including each terminal using the unit channel identified by the unit channel identification. Such as: the grouping information can be as shown in fig. 3b, wherein CH _ ID _1, CH _ ID _2 and CH _ ID _3 are unit channel identifications of each unit channel; STA _ ID _1, STA _ ID _2, and STA _ ID _3 are terminal identification sequences of terminals using the unit channel identified by CH _ ID _1, STA _ ID _4 and STA _ ID _5 are terminal identification sequences of terminals using the unit channel identified by CH _ ID _2, and STA _ ID _6 is a terminal identification of a terminal using the unit channel identified by CH _ ID _ 3.

The grouping information needs to show the correspondence between the unit channel identifier and the terminal identifier, for example: as shown in fig. 3b, the terminal identification of the terminal is located behind the unit channel identification of the unit channel used by the terminal. Other ways of representing the correspondence may further include: the terminal id of the terminal is placed in front of the unit channel id of the unit channel used by the terminal, and the like, and the alternative method is not limited to the two methods mentioned here, as long as the correspondence between the unit channel id and the terminal id can be expressed and the terminal ids are arranged in sequence.

The target receiving terminal information specifically includes: in the above grouping information, the order of the terminal id of the target receiving terminal in the terminal id sequence corresponding to the unit channel id of the target unit channel.

Such as: it is predetermined that the maximum number of terminals using each unit channel is 8, 3 bits are required to indicate the order of the terminal identification of the target receiving terminal in the terminal identification sequence corresponding to the unit channel identification of the target unit channel, and for STA _ ID _3 in fig. 3b, the target receiving terminal information may be indicated as "010", indicating that, among the grouping information, STA _ ID _3 is ordered as 3 rd in the terminal identification sequence of each terminal using the unit channel identified by CH _ ID _1 (for STA _ ID _1 in fig. 3b, the target receiving terminal information may be indicated as "000", and for STA _ ID _5 in fig. 3b, the target receiving terminal information may be indicated as "001"). Since each terminal only needs 3 bits, a 45bit savings is achieved over using a 48bit MAC address to identify the target receiving terminal.

When the network device 201 transmits a data frame, the data frame is placed on a target unit channel and transmitted to a target receiving terminal, and if the data frame includes data transmitted to the terminal 202, the network device 201 places the data frame on a unit channel used by the terminal 202 and transmits the data frame to the terminal 202.

Since the terminal 202 knows the unit channel identifier of the unit channel used by itself from the packet information in advance, the terminal 202 can receive the data frame on the unit channel used by itself; moreover, since the terminal 202 knows in advance from the packet information the sequence of the terminal identifier of its own in the terminal identifier sequence corresponding to the unit channel identifier of the unit channel used by itself, after the terminal 202 receives the data frame, if it is determined that the current terminal information is the same as the target receiving terminal information, it is determined that the data frame includes the data addressed to itself.

3. One group, the implementation mode three

In this embodiment, in the data transmission system provided in the embodiment of the present invention, data transmission is performed between the network device 201 and the scheduled Multiple terminals in a multi-user Multiple Input Multiple Output (MU-MIMO) manner, where the Multiple terminals scheduled by the network device 201 belong to at least one MU-MIMO group, and the terminal identifier is an MU-MIMO group identifier of the MU-MIMO group to which the terminal belongs. The MU-MIMO group refers to a group formed by a plurality of target objects which are subjected to MU-MIMO data transmission once in the same frequency band bandwidth. The target object is a network device or a terminal. This concept of MU-MIMO groups applies to all MU-MIMO groups in the embodiments of the present invention.

Such as: the grouping information may be as shown in fig. 3c, wherein MGrp _ ID _1 to MGrp _ ID _4 are the identities of the MU-MIMO groups.

Since the terminal 202 knows the MU-MIMO group to which the terminal belongs in advance and knows the MU-MIMO group id of the MU-MIMO group to which the terminal belongs, when the terminal 202 receives the MU-MIMO group id sequence in the grouping information, the terminal 202 may determine the order of the MU-MIMO group id of the MU-MIMO group to which the terminal belongs in the grouping information in the MU-MIMO group id sequence.

The terminal 202 receives a data frame sent by the network device 201, where the data frame carries target receiving terminal information. And if the sequence indicated by the target receiving terminal information is determined to be the same as the sequence of the group identifier of the MU-MIMO group to which the target receiving terminal information belongs in the group information in the MU-MIMO group identifier sequence, determining that the data frame comprises the data sent to the target receiving terminal.

Further, the data frame is sent by the network device 201 to each terminal in the MU-MIMO group to which the terminal 202 belongs, and the data in the data frame is placed according to the predetermined sequence between the network device 201 and each terminal in the MU-MIMO group to which the terminal 202 belongs, so that the terminal 202 can obtain the data sent to itself from the data frame according to the predetermined sequence.

4. One group, the implementation mode four

In this manner, in the data transmission system provided in the embodiment of the present invention, the network device 201 performs data transmission with multiple scheduled terminals in an MU-MIMO manner, and when the multiple scheduled terminals of the network device 201 divide into MU-MIMO groups, the following rules are followed:

the plurality of terminals belong to N MU-MIMO groups, each MU-MIMO group in the first N-1 MU-MIMO groups comprises K terminals in the plurality of terminals, the Nth MU-MIMO group comprises M terminals in the plurality of terminals, and the total number of the plurality of terminals is K (N-1) + M; wherein K, M, N is a positive integer and M is not greater than K.

Referring to fig. 3d, in the grouping information, the correspondence between the terminal identifier and the MU-MIMO group identifier of the MU-MIMO group satisfies the following rule:

in the grouping information, in the terminal identification sequences of the multiple terminals, K terminals identified by the first K terminal identifications (STA _ ID _1 to STA _ ID _ K) belong to a first MU-MIMO group, K terminals identified by the next K terminal identifications (STA _ ID _ K +1 to STA _ ID _2K) belong to a second MU-MIMO group, and so on, and M terminals identified by the last M terminal identifications (STA _ ID _ (N-1) K +1 to STA _ ID _ (N-1) K + M) belong to an nth MU-MIMO group.

The target receiving terminal information specifically includes: in the grouping information, the order of the terminal identification of the first terminal in the target MU-MIMO group in the sequence of terminal identifications of the plurality of terminals.

Referring to fig. 3d, if the target receiving terminal is the second terminal in the second MU-MIMO group, and the network device 201 transmits the data frame to each terminal in the second MU-MIMO group to which the target receiving terminal belongs when transmitting the data frame to the target receiving terminal, the terminal identifier of the target receiving terminal is STA _ ID _ K +2, the MU-MIMO group to which the target receiving terminal belongs is the second MU-MIMO group, and the terminal identifier of the first terminal in the MU-MIMO group is STA _ ID _ K +1, the target receiving terminal information is used to indicate the order of STA _ ID _ K +1 in the terminal identifier sequences of the plurality of terminals.

Further examples are as follows: the network device 201 schedules 10 terminals, in the grouping information, the terminals identified by the first 4 terminal identifications belong to a first MU-MIMO group, the terminals identified by the next 4 terminal identifications belong to a second MU-MIMO group, and the terminals identified by the last 2 terminal identifications belong to a third MU-MIMO group. The target receiving terminal is the second terminal in the second MU-MIMO group, i.e. the terminal id of the target receiving terminal is ordered to 6 in the terminal id sequence of each terminal in the grouping information. If terminal 202 is the target receiving terminal, after receiving the grouping information, terminal 202 determines that its terminal id is ranked in the grouping information as 6, and if terminal 202 knows in advance that there are 4 terminals in one MU-MIMO group, it may determine that it belongs to a second MU-MIMO group, and the terminal id of the first terminal in the MU-MIMO group is ranked in the grouping information as 5. If the target receiving terminal information received by the terminal 202 indicates that the terminal id of the first terminal in the target MU-MIMO group is 5 in the sequence of terminal ids of multiple terminals, the terminal 202 determines that the data frame includes data addressed to itself.

If the maximum number of terminal identifiers of the plurality of terminals scheduled by the network device 201 is predetermined to be 10, a total of 4 bits are required to represent the target receiving terminal information. For terminal 202 whose target receiving terminal information is the order of the terminal identification of the first terminal in the MU-MIMO group to which it belongs in the terminal identification sequences of the terminals in the grouping information, which is 5, the target receiving terminal information may be represented by "0101" (where "0000" represents the order of the terminal identification of the first terminal in the first MU-MIMO group in the terminal identification sequences of the plurality of terminals, and "1001" represents the order of the terminal identification of the first terminal in the third MU-MIMO group in the terminal identification sequences of the plurality of terminals). 44 bits can be saved compared to a 48bit MAC address.

In this embodiment, after receiving the target receiving terminal information, if the terminal 202 determines that the sequence of the terminal identifier of the first terminal in the MU-MIMO group to which the terminal belongs in the terminal identifier sequences of the multiple terminals is the same as the sequence indicated by the target receiving terminal information, it determines that the data frame includes data addressed to the terminal, and reads the data addressed to the terminal from the data frame according to the sequence agreed in advance with the network device 201.

5. One group, implementation five

In this way, the data transmission system provided by the embodiment of the present invention adopts the MU-MIMO technology. The rule for dividing the MU-MIMO group of the plurality of terminals scheduled by the network device 201 is the same as the rule for dividing the group of 4 and one group, which is implemented in the fourth way; in the grouping information, the rule that the correspondence between the terminal identifier and the MU-MIMO group identifier of the MU-MIMO group satisfies is also the same as the rule of the above 4, one grouping, and the implementation manner is the same, and repeated parts are not described again.

Unlike the fourth implementation manner of the above 4, which is one group, in this implementation manner, the target receiving terminal information is: and in the grouping information, the target MU-MIMO group has the sequence number in the N MU-MIMO groups.

Referring to fig. 3d, still taking the terminal 202 as the second terminal in the second MU-MIMO group as an example, the data frame sent by the network device 201 to the terminal 202 is also sent to each terminal in the second MU-MIMO group to which the terminal 202 belongs, and the target receiving terminal information is the sequence number of the second MU-MIMO group in the N MU-MIMO groups. If the maximum number of MU-MIMO groups to which the plurality of terminals scheduled by the network device 201 belongs is predetermined to be 8, 3 bits are required to represent the target receiving terminal information, for example, "001" (in this case, "000" represents the sequence number of the first MU-MIMO group in the N MU-MIMO groups, and "101" represents the sequence number of the sixth MU-MIMO group in the N MU-MIMO groups).

In this manner, after receiving the target receiving terminal information, if the terminal 202 determines that the sequence number of the MU-MIMO group to which the terminal belongs in each MU-MIMO group is the same as the sequence indicated by the target receiving terminal information, it determines that the data frame includes data addressed to the terminal, and reads the data addressed to the terminal from the data frame according to the sequence agreed in advance with the network device 201.

6. Multiple groups, implementation mode one

In this manner, the network device 201 divides the scheduled plurality of terminals into a plurality of packets, and transmits packet information of the plurality of packets to the plurality of terminals, where the packet information includes a packet identifier of each packet and a terminal identifier sequence corresponding to each packet identifier, and the terminal identifier sequence includes terminal identifiers of terminals in the packets identified by the packet identifiers arranged in sequence.

Such as: the packet information can be as shown in fig. 4a, wherein GRP _ ID _1 and GRP _ ID _2 are packet identifications; STA _ ID _1, STA _ ID _2, and STA _ ID _3 are terminal identification sequences corresponding to the group identification GRP _ ID _1, and STA _ ID _4 and STA _ ID _5 are terminal identification sequences corresponding to the group identification GRP _ ID _ 2.

The network device 201 sends a data frame to the terminal 202, where the data frame carries the group identifier of the group to which the terminal 202 belongs and the target receiving terminal information, and the target receiving terminal information is an order of the terminal identifier of the terminal 202 in the terminal identifier sequence corresponding to the group identifier of the group to which the terminal 202 belongs, so that the terminal 202 can determine that the data frame includes data addressed to itself according to the received group identifier and the received target receiving terminal information.

Such as: presetting that the maximum number of the packets to which the plurality of terminals scheduled by the network device 201 belong is 8, and then 3 bits are needed to represent a target packet identifier; if the maximum number of terminals belonging to the same group is specified to be 16 in advance, 4 bits are required to represent the target receiving terminal information, and 7 bits are required in total to identify the target receiving terminal, which saves 41 bits compared with a 48-bit MAC address.

7. Multiple groups, implementation mode two

In this embodiment, the network device 201 divides a plurality of scheduled terminals into a plurality of packets, and each terminal in each packet uses at least one unit channel, and each terminal using one unit channel belongs to at least one packet. The grouping information specifically includes: the group identifier of each group corresponds to each group identifier, the unit channel identifier of each unit channel used by each terminal in the group identified by the group identifier and each unit channel identifier corresponding to each group identifier comprise a terminal identifier sequence of each terminal using the unit channel identified by the unit channel identifier in the group identified by the group identifier arranged in sequence.

Such as: the packet information can be as shown in fig. 4b, wherein GRP _ ID _1 and GRP _ ID _2 are packet identifiers; CH _ ID _1, CH _ ID _2, CH _ ID _3, and CH _ ID _4 are unit channel identifications of the unit channels. In the group identified by the GRP _ ID _1, STA _ ID _2, and STA _ ID _3 use the terminal identification sequence of each terminal of the unit channel identified by CH _ ID _ 1; STA _ ID _4 and STA _ ID _5 are terminal identification sequences of each terminal using a unit channel identified by CH _ ID _2 in a group identified by GRP _ ID _ 1; STA _ ID _6 and STA _ ID _7 are terminal identification sequences of terminals using a unit channel identified by CH _ ID _3 in a packet identified by GRP _ ID _ 2; STA _ ID _8 is the terminal ID of the terminal using the unit channel identified by CH _ ID _4 in the packet identified by GRP _ ID _ 2.

The corresponding relationship between the grouping identifier, the unit channel identifier and the terminal identifier is required to be embodied in the grouping information. As shown in fig. 4b, the terminal identity of a terminal is located behind the unit channel identity of the unit channel used by the terminal, and the unit channel identity is located behind the corresponding group identity; or the terminal identification of the terminal is located after the group identification of the group to which the terminal belongs, and the group identification is located after the unit channel identification of the unit channel used by each terminal in the group. Other ways of representing the correspondence may further include: the terminal identifier of the terminal is placed in front of the unit channel identifier of the unit channel used by the terminal, the unit channel identifier is placed in front of the corresponding group identifier, and the like. The alternative mode is not limited to the two modes listed here, as long as the correspondence between the group identifier, the unit channel identifier and the terminal identifier can be expressed, and the terminal identifiers are arranged in sequence.

The target receiving terminal information specifically includes: in the packet information, the terminal identifier of the target receiving terminal is the order in the terminal identifier sequence corresponding to the unit channel identifier of the target unit channel used by the target receiving terminal in the packet to which the target receiving terminal belongs.

The network device 201 transmits the data frame to the target receiving terminal, and transmits the target grouping identifier and the target receiving terminal information to the target receiving terminal. If the maximum number of the packets to which the plurality of terminals scheduled by the network device 201 belong is predetermined to be 8, 3 bits are required to represent a target packet identifier; if it is specified in advance that the maximum number of terminals using the same unit channel in the same packet is 10, 4 bits are required to represent the target receiving terminal information, and 7 bits are required in total to identify the target receiving terminal, which saves 41 bits compared with a 48-bit MAC address.

When the network device 201 transmits a data frame, the data frame is placed on the target unit channel and transmitted to the target receiving terminal, and if the data frame is transmitted to the terminal 202, the network device 201 places the data frame on the unit channel used by the terminal 202 and transmits the data frame to the terminal 202.

Since the terminal 202 knows the unit channel identifier of the unit channel used by itself from the packet information in advance, the terminal 202 can receive the data frame on the unit channel used by itself; furthermore, since the terminal 202 knows the group identifier of the group to which the terminal belongs and the sequence of the terminal identifier sequence corresponding to the unit channel identifier of the unit channel used by the terminal in the group to which the terminal 202 belongs in advance from the group information, after receiving the target group identifier and the target receiving terminal information, if it is determined that the group identifier of the group to which the terminal belongs is the same as the target group identifier and the current terminal information is the same as the target receiving terminal information, it is determined that the data frame includes the data addressed to the terminal 202.

8. Multiple groups, implementation mode three

In this way, in the data transmission system provided in the embodiment of the present invention, the network device 201 and the scheduled multiple terminals perform data transmission in an MU-MIMO manner. The network device 201 divides the scheduled plurality of terminals into a plurality of groups, each terminal in each group belonging to at least one MU-MIMO group, and the terminal identity is a MU-MIMO group identity of the MU-MIMO group to which the terminal belongs.

Such as: the grouping information may be as shown in fig. 4c, where GRP _ ID _1 and GRP _ ID _2 are grouping identifications, MGrp _ ID _1, MGrp _ ID _2, and MGrp _ ID _3 are MU-MIMO group identification sequences of MU-MIMO groups to which the terminals belong in the grouping identified by the grouping identification GRP _ ID _1, and MGrp _ ID _4 is a MU-MIMO group identification of MU-MIMO groups to which the terminals belong in the grouping identified by the grouping identification GRP _ ID _ 2.

Since the terminal 202 knows the MU-MIMO group to which the terminal belongs in advance and knows the MU-MIMO group id of the MU-MIMO group to which the terminal belongs, when the terminal 202 receives the grouping information, which includes the grouping id of each group and the MU-MIMO group id sequence of the MU-MIMO group to which the terminal belongs, which is included in the grouping identified by the grouping id, corresponding to each grouping id, the terminal 202 may determine the grouping id corresponding to the MU-MIMO group id of the MU-MIMO group to which the terminal belongs, that is, the grouping id of the group to which the terminal belongs, and the order of the MU-MIMO group id of the MU-MIMO group to which the terminal belongs in the grouping information in the MU-MIMO group id sequence corresponding to the group id.

After the terminal 202 receives the data frame sent by the network device 201 and receives the target grouping identifier and the target receiving terminal information, if it is determined that the target grouping identifier is the same as the grouping identifier of the group to which the terminal itself belongs, and the sequence of the MU-MIMO group identifier of the MU-MIMO group to which the terminal itself belongs in the grouping information in the MU-MIMO group identifier sequence corresponding to the grouping identifier is the same as the sequence indicated by the target receiving terminal information, it is determined that the data frame includes data addressed to the terminal itself.

If the maximum number of the packets to which the plurality of terminals scheduled by the network device 201 belong is predetermined to be 8, 3 bits are required to represent a target packet identifier; if it is specified in advance that the maximum number of MU-MIMO groups to which each terminal belongs in the same group is 4, 2 bits are needed to represent the information of the target receiving terminal, and 6 bits are needed to identify the target receiving terminal in total, thereby saving 42 bits compared with 48-bit MAC addresses.

9. Multiple groups, implementation mode four

In this manner, in the data transmission system provided in the embodiment of the present invention, the network device 201 performs data transmission with the scheduled multiple terminals in the MU-MIMO manner, the network device 201 divides the scheduled multiple terminals into multiple groups, and each terminal in each of the multiple groups belongs to at least one MU-MIMO group.

For each packet, the terminals scheduled by the network device 201 when dividing the MU-MIMO group follow the following rules:

if the terminals in the group belong to N MU-MIMO groups, each MU-MIMO group in the first N-1 MU-MIMO groups comprises K terminals in the group, the Nth MU-MIMO group comprises M terminals in the group, and the group has K (N-1) + M terminals; wherein K, M, N is a positive integer and M is not greater than K.

Referring to fig. 4d, the group identification of each group is included in the group information, and the group identification corresponds to each group identification, and the group identification identifies a sequence of terminal identifications of the terminals included in the identified group. Corresponding to each group identification, the corresponding relation between the terminal identification of each terminal included in the group identified by the group identification and the MU-MIMO group identification of the MU-MIMO group satisfies the following rule:

in the terminal identification sequence of each terminal belonging to the group identified by GRP _ ID _1, K terminals identified by the first K terminal identifications (STA _ ID _ 1-STA _ ID _ K) belong to a first MU-MIMO group, K terminals identified by the next K terminal identifications (STA _ ID _ K + 1-STA _ ID _2K) belong to a second MU-MIMO group, and so on, and M terminals identified by the last M terminal identifications (STA _ ID _ (N-1) K + 1-STA _ ID _ (N-1) K + M) belong to an Nth MU-MIMO group. Similar rules are satisfied for the correspondence between the terminal identification of each terminal belonging to the group identified by GPR _ ID _2 and the MU-MIMO group identification of the MU-MIMO group, except that the number of MU-MIMO groups included in the group identified by GPR _ ID _2 may be different from that of GPR _ ID _1, and the number of terminals included in the group may also be different from that of GPR _ ID _ 1.

The target receiving terminal information specifically includes: in the grouping information, the first terminal in the target MU-MIMO group is in the order of the terminal identification sequence corresponding to the grouping identification of the group to which the target MU-MIMO group belongs.

Referring to fig. 4d, if the terminal 202 is the second terminal in the second MU-MIMO group in the group identified by GRP _ ID _1, and the network device 201 transmits the data frame to the terminal 202, and the terminal identifier of the target receiving terminal is STA _ ID _ K +2, and the MU-MIMO group to which the target receiving terminal belongs is the second MU-MIMO group in the group identified by GRP _ ID _1, and the terminal identifier of the first terminal in the MU-MIMO group is STA _ ID _ K +1, then the target receiving terminal information is used to indicate the order of STA _ ID _ K +1 in the terminal identifier sequence of each terminal in the group identified by GRP _ ID _ 1.

If 9 terminals in the plurality of terminals scheduled by the network device 201 belong to the group identified by GRP _ ID _1, in the group information, the terminals identified by the first 4 terminal identifications belong to a first MU-MIMO group, the terminals identified by the next 4 terminal identifications belong to a second MU-MIMO group, and the terminals identified by the last 2 terminal identifications belong to a third MU-MIMO group. Terminal 202 is the second terminal in the second MU-MIMO group, i.e., the terminal identification of terminal 202 is ordered as 6 in the sequence of terminal identifications for each terminal of the group in the grouping information. After receiving the grouping information, the terminal 202 determines that the terminal id of itself in the grouping information is ordered to 6 in the terminal id sequence of each terminal in the grouping to which itself belongs, and if the terminal 202 knows 4 terminals in one MU-MIMO group in advance, it can determine that itself belongs to the second MU-MIMO group of the grouping, and the terminal id of the first terminal in the MU-MIMO group is ordered to 5 in the grouping information.

If the maximum packet number of the packets to which the plurality of terminals scheduled by the network device 201 belong is predetermined to be 8, 3 bits are required to represent a target packet identifier; if the maximum number of terminals included in one packet is specified to be 10 in advance, 4 bits in total are required to represent target reception terminal information. For terminal 202 whose target receiving terminal information is the order of the terminal identification of the first terminal in the MU-MIMO group to which it belongs in the terminal identification sequence of each terminal in the grouping information, the terminal identification having an order of 5, the target receiving terminal information may be represented by "0101" (where "0000" represents the order of the terminal identification of the first terminal in the first MU-MIMO group in the terminal identification sequence of each terminal in the grouping and "1001" represents the order of the terminal identification of the first terminal in the third MU-MIMO group in the terminal identification sequence of each terminal in the grouping).

In this mode, the target packet identifier and the target receiving terminal information are used to identify the terminal, and 3 bits +4 bits are required to be 7 bits, which can save 41 bits compared with 48-bit MAC addresses.

In this embodiment, after receiving the target group identifier and the target receiving terminal information, if the target group identifier is the same as the group identifier of the group to which the terminal 202 belongs, and the sequence of the terminal identifier of the first terminal in the MU-MIMO group to which the terminal belongs in the terminal identifier sequence corresponding to the group identifier of the group to which the MU-MIMO group belongs is the same as the sequence indicated by the target receiving terminal information, it is determined that the data frame includes data addressed to the terminal, and the data addressed to the terminal is read from the data frame according to the sequence agreed in advance with the network device 201.

10. Multiple groups, implementation five

In this manner, the data transmission system provided in the embodiment of the present invention still uses the MU-MIMO technology, the network device 201 divides the scheduled multiple terminals into multiple groups, and each terminal in each of the multiple groups belongs to at least one MU-MIMO group.

In this embodiment, for each packet, the rule for dividing the MU-MIMO group of each terminal scheduled by the network device 201 is the same as the rule for the above 9, multiple packets, and the rule for implementing the fourth embodiment; in the grouping information, the rule that the correspondence between the terminal identifier and the MU-MIMO group identifier of the MU-MIMO group satisfies is also the same as the above multiple groups in fig. 7, and the rule of the third implementation manner is the same, and repeated parts are not described again.

In this embodiment, the target receiving terminal information is, in contrast to the above-described multiple grouping and multiple implementation method 9: in the grouping information, the target MU-MIMO group has a sequence number in each MU-MIMO group in the group to which the target MU-MIMO belongs.

Referring to fig. 4d, still taking the terminal 202 as the second terminal in the second MU-MIMO group in the group identified by GRP _ ID _1 as an example, the data frame sent by the network device 201 to the terminal 202 is also sent to each terminal in the second MU-MIMO group to which the terminal 202 belongs, and the target receiving terminal information is the sequence number of the second MU-MIMO group in the N MU-MIMO groups.

If the maximum packet number of the packets to which the plurality of terminals scheduled by the network device 201 belong is predetermined to be 8, 3 bits are required to represent a target packet identifier; if the maximum number of MU-MIMO groups to which the plurality of terminals scheduled by the network device 201 belongs is also predetermined to be 8, then 3 bits are required to represent the target receiving terminal information, for example, "001" (in this case, "000" represents the sequence number of the first MU-MIMO group in the N MU-MIMO groups, and "101" represents the sequence number of the sixth MU-MIMO group in the N MU-MIMO groups).

In this way, the target packet identifier and the target receiving terminal information are used to identify the terminal, and 3bit +3bit is required to be 6bit, which can save 42bit compared with 48bit MAC address.

In this embodiment, after receiving the target group identifier and the target receiving terminal information, if the terminal 202 determines that the group identifier of the group to which the terminal belongs is the same as the target group identifier, and the sequence number of the MU-MIMO group to which the terminal belongs in each MU-MIMO group in the group to which the terminal belongs is the same as the sequence indicated by the target receiving terminal information, it is determined that the data frame includes data addressed to the terminal, and the data addressed to the terminal is read from the data frame according to the sequence agreed in advance with the network device 201.

Regardless of the various implementations of the network device 201 listed in table 1 for dividing a plurality of terminals into one packet or the various implementations of the network device 201 listed in table 2 for dividing a plurality of terminals into a plurality of packets, alternatively, the target receiving terminal information may be located in the physical layer signaling SIG of the data frame transmitted by the network device 201.

Further, optionally, the SIG of the data frame transmitted by the network device 201 further includes resource information of physical layer resources allocated to the target receiving terminal. The resource information of the physical layer resource includes at least one of the following information: a Modulation and Coding Scheme (MCS), a bandwidth (bandwidth _ th, BW), a data length (length), and the like, which are used for a target receiving terminal to transmit data.

Optionally, if in the data transmission system provided in the embodiment of the present invention, the network device 201 performs data transmission with Multiple scheduled terminals in an Orthogonal Frequency Division Multiple Access (OFDMA) manner, where the resource information may include: information of OFDMA subchannels.

If, in the data transmission system provided in the embodiment of the present invention, data transmission is performed between the network device 201 and the scheduled multiple terminals in a multi-use MU-MIMO manner, the resource information may include: space-time stream information.

In addition, the network device 201 may also send information of the valid Duration of the packet information to the scheduled multiple terminals, where the network device 201 may carry the information of the valid Duration by using a dedicated field or a Duration field in a data frame.

The data transmission system provided in the embodiment of the present invention is described in detail above. The data transmission system can be a data transmission system consisting of an AP and an STA in the WLAN, and all wireless communication systems for acquiring the channel use right based on a competition mode.

Hereinafter, a WLAN is taken as an example, and the detailed description is given through specific second embodiment, third embodiment, and fourth embodiment.

[ example two ]

In the second embodiment, the AP divides a plurality of STAs scheduled by the AP into one or more packets, and identifies the STA by using the packet identifier of the packet to which the STA belongs and the order of the identifiers of the STAs in the identifier sequence of each STA in the packet to which the STA belongs as the temporary identifier of the STA.

Fig. 5 is a flowchart of the AP side method in the second embodiment. As shown in fig. 5, the method includes the steps of:

s501: the AP sends grouping information by using fields in the management frame or any frame;

the grouping information may indicate that a plurality of STAs scheduled by the AP are grouped into one group or a plurality of groups, and the identity of the STA in each group.

If the packet is divided into one group, only the STA identification of each STA in the group is required to be indicated; if the packet is divided into a plurality of packets, the packet identifier of each packet needs to be indicated.

Such as: the AP schedules 8 STAs, which the AP divides into 2 packets: packet 0 and packet 1, identifying the two packets with "0" and "1", respectively; each packet includes 4 STAs, such as: packet 0 includes STA 0-STA 3; packet 1 includes STAs 4-7; wherein "0" to "3" are the intra-STA group identifiers (e.g., location numbers or sequence numbers) of the STAs in group 0, and "4" to "7" are the intra-STA group identifiers of the STAs in group 1.

S502: the AP carries the temporary identity of the STA in the physical layer Signaling (SIG) of the subsequently transmitted data frame, i.e.: packet identification + intra-STA group identification.

If the packet information transmitted in step S501 indicates that the STA is divided into only one packet, the STA can be uniquely indicated by merely indicating its position in the one packet in the SIG.

Besides, the temporary identifier of the STA is carried in the SIG, and resource information of physical layer resources allocated to the STA by the AP, such as OFDMA subchannel information and/or space-time stream information used by the STA, may also be indicated in the SIG.

The AP may transmit at least one data frame after transmitting the packet information at step S501. In order to support valid indication of multiple data frames, optionally, the AP sets a valid duration for the packet information sent in step S501.

Specifically, the valid Duration may be defined by a dedicated field, and may also be set by a Duration field of a frame or any frame carrying the field. For the former case, the effective duration of the packet information may be less than the length of a transmission Opportunity (TXOP), which is 5ms at most; may also be equal to the TXOP length, or greater than the TXOP length, or may even be equal to the Beacon period (Beacon Interval), typically greater than or equal to 100 ms; for the latter case, the effective Duration of the packet information is defined by Duration field, and the more typical Duration is one TXOP length.

Considering the case of the above example, 1bit may be used in the SIG to distinguish the packet identities of the two packets, and 2 bits may be used to uniquely identify the STA's location within the packet. By combining the two indications, the AP can uniquely identify a specific STA, and only use 3 bits, which saves 45 bits compared to a 48-bit MAC address.

Fig. 6 is a flowchart of a method of the STA side of example two. As shown in fig. 6, the method includes:

s601: the STA receives a field in a management frame or any frame to obtain grouping information, and the STA acquires the own temporary identifier according to the grouping information;

wherein, if the packet information sent by the AP includes: the grouping identification + the position information of the identification of the STA in the grouping, and then the STA takes the grouping identification of the grouping to which the STA belongs and the position information of the identification of the STA in the STA identification sequence of each STA in the grouping as the temporary identification of the STA; if the packet information sent by the AP only includes the location information of the STA, the STA uses the location information of itself as its temporary identifier.

If a STA receives multiple pieces of packet information, and the multiple pieces of packet information all relate to the STA, the STA optionally controls on the latest received packet information.

S602: an STA receives a data frame, reads an SIG field of the data frame and acquires a temporary identifier of the STA indicated by the current SIG field;

s603: the STA judges whether the STA temporary identifier indicated by the SIG field is a temporary identifier of the STA or not, if so, the STA switches to a corresponding physical layer resource according to resource information of the physical layer resource allocated to the STA in the data frame; otherwise, reading of the remaining information of the current frame may be stopped.

The resource information of the physical layer resource includes OFDMA subchannel information corresponding to the STA, and/or space-time stream information. The switching to the corresponding physical layer resource refers to that the STA switches the subchannel for the current read/transmit data to the OFDMA subchannel indicated by the AP, or switches the space-time stream for the current read/transmit data to the number of space-time streams indicated by the AP.

Further, the STA may also determine whether the packet information is still valid when receiving the current data frame according to the information of the valid duration of the packet information. If yes, go to step S602; otherwise, execution of step S602 may be stopped.

By the method of the embodiment, the overhead of the STA identifier in the SIG can be reduced.

Fig. 7 is a schematic diagram illustrating a transmission method of packet information and data frames transmitted between the STA and the AP. As shown in fig. 7, an STA first transmits packet information, and then carries a temporary identifier of an STA to which the data frame is addressed in a SIG field of the data frame to indicate that the STA includes data addressed to the STA in the data frame.

[ EXAMPLE III ]

In the third embodiment, a plurality of STAs are grouped according to the unit channel used by the STA, and STAs using the same unit channel belong to the same group.

The unit channel refers to a fixed and planned channel in the current WLAN network, such as: a bandwidth of 5MHz, 10MHz, or 20MHz, respectively.

When a plurality of STAs are grouped in accordance with the unit channel used by the STA, and the AP transmits SIG on the unit channel used by the STA, the SIG may not carry a packet identifier, but only position information of a position where each terminal using the unit channel is located by the STA.

As shown in fig. 8, in SIG transmitted to STA3 on unit channel 2, STA3 can be uniquely identified by the order "7" of identification of STA3 in the identification sequence of each STA using unit channel 2.

Further, for the case of simultaneous transmission of multiple unit channels, SIG may be sent independently on each unit channel, that is, the SIG only carries relevant information of the unit channel, such as temporary identity of STA, and resource information of physical layer resources allocated to the STA.

The AP sends a frame carrying grouping information, wherein the grouping information comprises: a unit channel identification of each unit channel, and an STA identification sequence of each STA using the unit channel identified by the unit channel identification, corresponding to each unit channel identification.

The frame carrying the packet information may be transmitted only on the primary channel (primary channel) or may be transmitted in a repeated manner (Duplicated Transmission) on all the unit channels. After acquiring the packet information, the STA switches to the unit channel used by the STA, and further determines resource information of an OFDMA subchannel used by the STA and other physical layer resources according to a unique identifier of the STA (i.e., position information of a position where the identifier of the STA is located in a sequence in a terminal identifier of each terminal using the unit channel) in the SIG transmitted on the unit channel.

[ EXAMPLE IV ]

The fourth embodiment extends from the spatial dimension, which is applicable to both OFDMA and MU-MIMO simultaneous applications in WLAN systems.

First mode

In the grouping information, the terminal identification is the MU-MIMO group identification of the MU-MIMO group to which the terminal belongs. Indicated in the SIG is the position of the MU-MIMO group identity of the MU-MIMO group to which the terminal belongs in each MU-MIMO group identity sequence in the grouping information.

When the AP sends a data frame, the AP sends the data frame to each AP in the MU-MIMO group, and the data in the data frame is placed according to the order agreed by the AP and each AP in the MU-MIMO group in advance; after receiving the data frame, if determining whether the data frame is sent to the AP, the AP reads data sent to the AP from the data frame according to a sequence agreed in advance with the AP.

Second mode

The packet information includes an identification sequence of each AP. The APs identified by the K adjacent identities default to belonging to the same MU-MIMO group, where a typical value for K is 4; of course, K may also be another value, or even a value dynamically adjusted by the AP, and may be specifically adjusted according to a field in the SIG or a field of the management frame.

The AP transmits target receiving terminal information in the SIG, wherein the target receiving terminal information is used for indicating the sequence of the identification of the first STA in the MU-MIMO group to which the target STA sent by the data frame belongs in the grouping information in the identification sequences of the plurality of STAs. And the target STA locates the identifier of the first AP in the MU-MIMO group to which the target STA belongs at the position of the MU-MIMO group as the sequence of the identifier of the target STA, determines that the data frame comprises the data sent to the target STA if the sequence of the identifier of the target STA is judged to be the same as the sequence indicated by the information of the target receiving terminal after receiving the information of the target receiving terminal, and reads the data sent to the target STA from the data frame according to the sequence agreed with the AP in advance.

Or, the AP transmits target receiving terminal information in the SIG, where the target receiving terminal information specifically is: in the grouping information, the MU-MIMO group to which the destination STA sent by the data frame belongs has the sequence number in each MU-MIMO group. And the target STA takes the sequence number of the MU-MIMO group to which the target STA belongs in each MU-MIMO group as the position of the terminal mark of the target STA, determines that the data frame comprises the data to be sent to the target STA if the sequence number of the MU-MIMO group to which the target STA belongs in each MU-MIMO group is judged to be the same as the sequence indicated by the target receiving terminal information after the target receiving terminal information is received, and reads the data to be sent from the data frame according to the sequence agreed with the AP in advance.

The data transmission system provided in the first embodiment of the present invention is described above, and a WLAN is taken as an example to describe a method for sending packet information and identifying terminal location information in the second embodiment of the present invention. The following describes technical effects of the embodiments of the present invention, compared with the conventional method of identifying STAs by using their reference IDs _ or temporary IDs _.

One existing scheme is to directly use the reference ID _ or temporary ID _ of the STA, such as AID _ entry, to identify the STA. ID — the main idea of this scheme is: signaling (SIGNALLING) is added after the Preamble to allocate STAs for each subcarrier in the subsequent OFDMA transmission data. The existing AID _ is 12 bits, and each STA needs at least 9 bits even if Partial AID _ (PAID _) is used instead as the identification of the STA. Therefore, from the number of bits required, 7 bits should indicate both Term ID _ and Mod ID _, the number of bits is small, and the scalability is poor.

In the following, the method provided by the embodiment of the present invention is compared with the above method of using PAID _ as the identity of STA.

Suppose that is provided with 2^m*2ⁿAnd the STA is used for identifying the position of the STA in the identification of each STA in the belonged group.

K STAs are scheduled at a time by the OFDMA frame, the legacy preamble length is 20us, the frame interval (SIFS) is 16us, the TXOP length is 5ms, and the frame length is 200 us.

The SIG is modulated by BPSK, the coding efficiency is 1/2, and the number of bits included in 1 symbol is p.

When QPSK modulation is adopted and the coding efficiency is 1/2, p is 1;

when 16QAM modulation is adopted, the coding efficiency is 1/2, p is 2;

when 64QAM modulation is used, the coding efficiency is 1/2, p is 3.

The group identifier of the group to which the STA belongs and a temporary identifier (AID _) indicating the location of the identifier of the STA in the identifier of each STA in the group are transmitted in the SIG, and the group identifier occupies mbit and AID occupies 12 bits.

If PAID _ is taken as the identification of the STA, the bit number of the PAID _ in SIG is fixed to 9 x K x 2, wherein K is the number of the STAs scheduled each time in the OFDMA frame;

if the method of using the packet identifier and the AID _ in the embodiment of the present invention is used, the number of bits in SIG is (m + n) × K × 2.

Therefore, compared with the conventional PAID _ identification method, the difference of the number of bits in the SIG is as follows: 2 x K (m + n-9).

The difference of the time length occupied during data transmission is [2 × K (m + N-9)/48] × 4 × N _ frame, where N _ frame is the number of frames transmitted continuously.

The time overhead occupied by sending the packet information is as follows:

T＝20+[12*2^n+m*2^m]/(p*48)]*4+SIFS us

from the above calculation results, the table comparison numerical results are shown in table 3 below.

TABLE 3

Based on the same inventive concept, the embodiments of the present invention further provide a network device, a terminal and a data transmission method, which are respectively described in the following embodiments five to sixteen. The network device provided in the following embodiment may be applied to the data transmission system provided in the embodiment of the present invention as the network device 201; the terminal can be used as the terminal 202 in the data transmission system provided by the embodiment of the invention; the data transmission method can realize data transmission between the network device 201 and the terminal 202. The implementation details of the network device, the terminal and the data transmission method can refer to the first to fourth embodiments, and repeated details are not repeated.

[ EXAMPLE V ]

As shown in fig. 9, a network device according to a fifth embodiment includes:

a first sending unit 901, configured to send packet information to multiple terminals scheduled by a network device, where the packet information includes a terminal identifier sequence, and the terminal identifier sequence includes terminal identifiers of multiple terminals arranged in sequence;

a second sending unit 902, configured to send a data frame, where the data frame carries target receiving terminal information used for indicating a target receiving terminal, where the target receiving terminal information is an order of a terminal identifier of the target receiving terminal in a terminal identifier sequence.

Optionally, the grouping information specifically includes: the unit channel identifier of each unit channel used by a plurality of terminals and the terminal identifier sequence of each terminal which corresponds to each unit channel identifier and uses the unit channel identified by the unit channel identifier are arranged in sequence;

the second sending unit 902 is specifically configured to: sending the data frame to a target receiving terminal on a target unit channel, wherein the target unit channel is a unit channel used by the target receiving terminal;

the target receiving terminal information is specifically: in the grouping information, the order of the terminal identification of the target receiving terminal in the terminal identification sequence corresponding to the unit channel identification of the target unit channel.

Optionally, data transmission is performed between the network device and a plurality of terminals in a multi-user multi-input multi-output (MU-MIMO) mode, the plurality of terminals belong to at least one MU-MIMO group, and the terminal identification sequence includes MU-MIMO group identifications of the MU-MIMO groups to which the plurality of terminals belong, which are sequentially arranged;

the second sending unit 902 is specifically configured to: and sending a data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the predetermined sequence of the network equipment and each terminal in the target MU-MIMO group, and the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

Optionally, the network device and the multiple terminals perform data transmission in an MU-MIMO manner, where the multiple terminals belong to N MU-MIMO groups, each MU-MIMO group in the first N-1 MU-MIMO groups includes K terminals in the multiple terminals, the nth MU-MIMO group includes M terminals in the multiple terminals, and the total number of the multiple terminals is K (N-1) + M; in the grouping information, in a terminal identification sequence of a plurality of terminals, K terminals identified by first K terminal identifications belong to a first MU-MIMO group, K terminals identified by next K terminal identifications belong to a second MU-MIMO group, and so on, and M terminals identified by last M terminal identifications belong to an Nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

the target receiving terminal information is specifically: in the grouping information, the order of the terminal identification of the first terminal in the target MU-MIMO group in the terminal identification sequence; or the sequence number of the target MU-MIMO group in the N MU-MIMO groups, wherein the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs;

the second sending unit 902 is specifically configured to: and sending data frames to each terminal in the target MU-MIMO group, wherein the data in the data frames are arranged according to the order pre-agreed by the network equipment and each terminal in the target MU-MIMO group.

[ EXAMPLE six ]

As shown in fig. 10, a network device according to a sixth embodiment includes:

a first transmitter 1001, configured to transmit packet information to a plurality of terminals scheduled by a network device, where the packet information includes a terminal identifier sequence, and the terminal identifier sequence includes terminal identifiers of the plurality of terminals arranged in sequence;

a second transmitter 1002, configured to transmit a data frame, where the data frame carries target receiving terminal information for indicating a target receiving terminal, where the target receiving terminal information is an order of terminal identifiers of the target receiving terminals in a terminal identifier sequence.

the second transmitter 1002 is specifically configured to: sending the data frame to a target receiving terminal on a target unit channel, wherein the target unit channel is a unit channel used by the target receiving terminal;

the second transmitter 1002 is specifically configured to: and sending a data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the predetermined sequence of the network equipment and each terminal in the target MU-MIMO group, and the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

the second transmitter 1002 is specifically configured to: and sending data frames to each terminal in the target MU-MIMO group, wherein the data in the data frames are arranged according to the order pre-agreed by the network equipment and each terminal in the target MU-MIMO group.

[ EXAMPLE VII ]

As shown in fig. 11, a network device according to a seventh embodiment includes:

a first sending unit 1101, configured to send packet information to a plurality of terminals scheduled by a network device, where the packet information includes: the network equipment divides a plurality of terminals into a group identifier of each group of a plurality of groups, and the group identifier corresponds to each group identifier and comprises a terminal identifier sequence, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

a second sending unit 1102, configured to send a data frame, where the data frame carries a target packet identifier and target receiving terminal information used to indicate a target receiving terminal;

the target grouping identifier is a grouping identifier of a group to which the target receiving terminal belongs, and the target receiving terminal information is as follows: in the grouping information, the terminal identification of the target receiving terminal is in the order in the terminal identification sequence corresponding to the grouping identification of the group to which the target receiving terminal belongs.

Optionally, in the plurality of groups, the terminals in each group use at least one unit channel, and each terminal using one unit channel belongs to at least one group; the grouping information specifically includes: a group identifier of each group, a unit channel identifier of each unit channel used by each terminal included in the group identified by the group identifier corresponding to each group identifier, and a terminal identifier sequence of each terminal using the unit channel identified by the unit channel identifier in the group identified by the group identifier arranged in sequence corresponding to each unit channel identifier corresponding to each group identifier;

the target receiving terminal information is specifically: in the grouping information, the terminal identification of the target receiving terminal, and the sequence in the terminal identification sequence corresponding to the unit channel identification of the target unit channel used by the target receiving terminal in the grouping to which the target receiving terminal belongs;

the second sending unit 1102 is specifically configured to: and sending the data frame to a target receiving terminal on the target unit channel.

Optionally, the network device performs data transmission with multiple terminals in an MU-MIMO manner, where each terminal in each of the multiple groups belongs to at least one MU-MIMO group, and the terminal identification sequence includes, corresponding to each group identifier, sequentially arranged MU-MIMO group identifiers of MU-MIMO groups to which each terminal in the group identified by the group identifier belongs;

the second sending unit 1102 is specifically configured to: and sending a data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the predetermined sequence of the network equipment and each terminal in the target MU-MIMO group, and the MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

Optionally, the network device and the plurality of terminals perform data transmission in an MU-MIMO manner, and each terminal in each of the plurality of groups belongs to at least one MU-MIMO group;

for any one of a plurality of groups, if a terminal in the group belongs to N MU-MIMO groups, each of the first N-1 MU-MIMO groups includes K terminals in the group, the nth MU-MIMO group includes M terminals in the group, and the group has K (N-1) + M terminals in total, then in the group information, among the terminal identification sequences of the terminals belonging to the group, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, the M terminals identified by the last M terminal identifications belong to the nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

the target receiving terminal information is specifically: in the grouping information, the order of the terminal identification of the first terminal in the target MU-MIMO group in the terminal identification sequence corresponding to the grouping identification of the group to which the target MU-MIMO group belongs; or the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs;

the second sending unit 1102 is specifically configured to: and sending data frames to each terminal in the target MU-MIMO group, wherein the data in the data frames are arranged according to the order pre-agreed by the network equipment and each terminal in the target MU-MIMO group.

[ example eight ]

As shown in fig. 12, a network device according to an eighth embodiment includes:

a first transmitter 1101, configured to transmit packet information to a plurality of terminals scheduled by a network device, where the packet information includes: the network equipment divides a plurality of terminals into a group identifier of each group of a plurality of groups, and the group identifier corresponds to each group identifier and comprises a terminal identifier sequence, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

a second transmitter 1102, configured to send a data frame, where the data frame carries a target packet identifier and target receiving terminal information used to indicate a target receiving terminal;

the second transmitter 1102 is specifically configured to: and sending the data frame to a target receiving terminal on the target unit channel.

the second transmitter 1102 is specifically configured to: and sending a data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the predetermined sequence of the network equipment and each terminal in the target MU-MIMO group, and the MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

the second transmitter 1102 is specifically configured to: and sending data frames to each terminal in the target MU-MIMO group, wherein the data in the data frames are arranged according to the order pre-agreed by the network equipment and each terminal in the target MU-MIMO group.

[ EXAMPLE ninth ]

As shown in fig. 13, the terminal according to the ninth embodiment includes:

a receiving unit 1301, configured to receive packet information sent by a network device, where the packet information includes a terminal identifier sequence, and the terminal identifier sequence includes terminal identifiers of multiple terminals scheduled by the network device in sequential arrangement;

a processing unit 1302, configured to determine current terminal information, where the current terminal information is an order of terminal identifiers of terminals in a terminal identifier sequence in the grouping information;

the receiving unit 1301 is further configured to: receiving a data frame sent by network equipment, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal to which the data frame is sent, and the target receiving terminal information is the sequence of terminal identifications of the target receiving terminal in a terminal identification sequence in grouping information;

the processing unit 1302 is further configured to: and if the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the terminal, and acquiring the data sent to the terminal from the data frame.

the receiving unit 1301 is specifically configured to: receiving a data frame sent by network equipment on a current unit channel used by a terminal;

the target receiving terminal information is specifically: in the packet information, the terminal id of the target receiving terminal is in the order in the terminal id sequence corresponding to the unit channel id of the unit channel used by the target receiving terminal.

Optionally, the network device and the plurality of terminals perform data transmission in a multi-user multi-input multi-output MU-MIMO manner, the plurality of terminals belong to at least one MU-MIMO group, and the terminal identification sequence includes MU-MIMO group identifications of MU-MIMO groups to which the plurality of terminals belong, which are sequentially arranged;

the data frame is sent to each terminal in the target MU-MIMO group by the network equipment, the data in the data frame is placed according to the sequence agreed by the network equipment and each terminal in the target MU-MIMO group in advance, and the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs;

the processing unit 1302 is specifically configured to: if it is determined that the data frame includes data addressed to the terminal, after the receiving unit 1301 receives the data frame, the data addressed to the terminal is acquired from the data frame according to a sequence agreed in advance by the network device and the terminal.

the data frame is sent to each terminal in the target MU-MIMO group by the network equipment, and the data in the data frame is placed according to the sequence agreed by the network equipment and each terminal in the target MU-MIMO group in advance;

[ EXAMPLE eleven ]

As shown in fig. 14, a terminal according to a tenth embodiment includes:

a receiver 1401, configured to receive packet information sent by a network device, where the packet information includes a terminal identifier sequence, and the terminal identifier sequence includes terminal identifiers of multiple terminals scheduled by a sequentially arranged network device;

a processor 1402, configured to determine current terminal information, where the current terminal information is an order of terminal identifiers of terminals in a terminal identifier sequence in the packet information;

the receiver 1401 is further configured to: receiving a data frame sent by network equipment, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal to which the data frame is sent, and the target receiving terminal information is the sequence of terminal identifications of the target receiving terminal in a terminal identification sequence in grouping information;

the processor 1402 is further configured to: and if the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the terminal, and acquiring the data sent to the terminal from the data frame.

the receiver 1401 is specifically configured to: receiving a data frame sent by network equipment on a current unit channel used by a terminal;

the processor 1402 is specifically configured to: if it is determined that the data frame includes data addressed to the terminal, after the receiver 1401 receives the data frame, the data addressed to the terminal is acquired from the data frame according to a sequence agreed in advance by the network device and the terminal.

[ example eleven ]

A receiving unit 1501, configured to receive packet information sent by a network device, where the packet information includes: the network equipment divides a plurality of scheduled terminals into a group identifier of each group of a plurality of groups and comprises a terminal identifier sequence corresponding to each group identifier, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

a processing unit 1502 configured to determine a current packet identifier and current terminal information; wherein the current group identifier is: in the grouping information, a grouping identifier corresponding to a terminal identifier of a terminal; the current terminal information is: in the grouping information, the sequence of the terminal identification of the terminal in the terminal identification sequence corresponding to the current grouping identification;

the receiving unit 1501 is further configured to: receiving a data frame sent by network equipment, wherein the data frame carries a target grouping identifier and target receiving terminal information; the target grouping identification is the grouping identification of the grouping which the target receiving terminal belongs to and is sent to by the data frame; the target receiving terminal information is the sequence of the terminal identification of the target receiving terminal in the terminal identification sequence corresponding to the group identification of the group to which the target receiving terminal belongs;

the processing unit 1502 is further configured to: and if the current grouping identifier is the same as the target grouping identifier and the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the terminal, and acquiring the data sent to the terminal from the data frame.

the receiving unit 1501 is specifically configured to: and receiving the data frame sent by the network equipment on the current unit channel used by the terminal.

Optionally, the network device and the plurality of terminals perform data transmission in a multi-user multiple-input multiple-output (MU-MIMO) manner, each terminal in each of the plurality of groups belongs to at least one MU-MIMO group, and the terminal identification sequence includes, in order, MU-MIMO group identifications of MU-MIMO groups to which each terminal in the group identified by the group identification belongs, corresponding to each group identification;

the processing unit 1502 is specifically configured to: and if the data frame is determined to contain the data sent to the terminal, acquiring the data sent to the terminal from the data frame according to the sequence agreed by the network equipment and the terminal in advance after the data frame is received.

[ EXAMPLE twelfth ]

As shown in fig. 16, a terminal according to a twelfth embodiment includes:

a receiver 1601, configured to receive packet information sent by a network device, where the packet information includes: the network equipment divides a plurality of scheduled terminals into a group identifier of each group of a plurality of groups and comprises a terminal identifier sequence corresponding to each group identifier, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

a processor 1602, configured to determine a current group identifier and current terminal information; wherein the current group identifier is: in the grouping information, a grouping identifier corresponding to a terminal identifier of a terminal; the current terminal information is: in the grouping information, the sequence of the terminal identification of the terminal in the terminal identification sequence corresponding to the current grouping identification;

the receiver 1601 is further configured to: receiving a data frame sent by network equipment, wherein the data frame carries a target grouping identifier and target receiving terminal information; the target grouping identification is the grouping identification of the grouping which the target receiving terminal belongs to and is sent to by the data frame; the target receiving terminal information is the sequence of the terminal identification of the target receiving terminal in the terminal identification sequence corresponding to the group identification of the group to which the target receiving terminal belongs;

the processor 1602 is also configured to: and if the current grouping identifier is the same as the target grouping identifier and the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the terminal, and acquiring the data sent to the terminal from the data frame.

the receiver 1601 is specifically configured to: and receiving the data frame sent by the network equipment on the current unit channel used by the terminal.

the processor 1602 is specifically configured to: and if the data frame is determined to contain the data sent to the terminal, acquiring the data sent to the terminal from the data frame according to the sequence agreed by the network equipment and the terminal in advance after the data frame is received.

[ EXAMPLE thirteen ]

As shown in fig. 17, a data transmission method according to a thirteenth embodiment includes:

s1701: sending grouping information to a plurality of terminals scheduled by current network equipment, wherein the grouping information comprises a terminal identification sequence which comprises terminal identifications of a plurality of terminals arranged in sequence;

s1702: and sending a data frame, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal, and the target receiving terminal information is the sequence of the terminal identification of the target receiving terminal in the terminal identification sequence.

step S1702 of transmitting a data frame includes: sending the data frame to a target receiving terminal on a target unit channel, wherein the target unit channel is a unit channel used by the target receiving terminal;

Optionally, data transmission is performed between the current network device and a plurality of terminals in a multi-user multi-input multi-output (MU-MIMO) manner, the plurality of terminals belong to at least one MU-MIMO group, and the terminal identification sequence includes MU-MIMO group identifications of MU-MIMO groups to which the plurality of terminals belong, which are sequentially arranged;

step S1702 of transmitting a data frame includes: and sending a data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the preset sequence of the current network equipment and each terminal in the target MU-MIMO group, and the target MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

Optionally, the current network device and multiple terminals perform data transmission in an MU-MIMO manner, where the multiple terminals belong to N MU-MIMO groups, each MU-MIMO group in the first N-1 MU-MIMO groups includes K terminals in the multiple terminals, the nth MU-MIMO group includes M terminals in the multiple terminals, and the total number of the multiple terminals is K (N-1) + M; in the grouping information, in a terminal identification sequence of a plurality of terminals, K terminals identified by first K terminal identifications belong to a first MU-MIMO group, K terminals identified by next K terminal identifications belong to a second MU-MIMO group, and so on, and M terminals identified by last M terminal identifications belong to an Nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

step S1702 of transmitting a data frame includes: and sending data frames to each terminal in the target MU-MIMO group, wherein the data in the data frames are placed according to the order pre-agreed by the current network equipment and each terminal in the target MU-MIMO group.

[ example fourteen ]

As shown in fig. 18, a data transmission method according to a fourteenth embodiment includes:

s1801: sending packet information to a plurality of terminals scheduled by the current network equipment, wherein the packet information comprises: the current network equipment divides a plurality of terminals into a group identifier of each group of a plurality of groups, and comprises a terminal identifier sequence corresponding to each group identifier, wherein the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

s1802: sending a data frame, wherein the data frame carries a target grouping identifier and target receiving terminal information used for indicating a target receiving terminal;

step S1802 sends a data frame, including: and sending the data frame to a target receiving terminal on the target unit channel.

Optionally, the current network device performs data transmission with multiple terminals in an MU-MIMO manner, where each terminal in each of multiple groups belongs to at least one MU-MIMO group, and the terminal identification sequence includes, corresponding to each group identifier, sequentially arranged MU-MIMO group identifiers of MU-MIMO groups to which each terminal in the group identified by the group identifier belongs;

step S1802 sends a data frame, including: and sending a data frame to each terminal in the target MU-MIMO group, wherein the data in the data frame is placed according to the preset sequence of the current network equipment and each terminal in the target MU-MIMO group, and the MU-MIMO group is the MU-MIMO group to which the target receiving terminal belongs.

Optionally, the current network device and a plurality of terminals perform data transmission in an MU-MIMO manner, and each terminal in each of a plurality of groups belongs to at least one MU-MIMO group;

step S1802 of transmitting a data frame to a target receiving terminal includes: and sending data frames to each terminal in the target MU-MIMO group, wherein the data in the data frames are arranged according to the order pre-agreed by the network equipment and each terminal in the target MU-MIMO group.

[ example fifteen ]

As shown in fig. 19, a data transmission method according to a fifteenth embodiment includes:

s1901: receiving grouping information sent by network equipment, wherein the grouping information comprises a terminal identification sequence which comprises terminal identifications of a plurality of terminals scheduled by the network equipment in sequence;

s1902: determining current terminal information, wherein the current terminal information is the sequence of terminal identifiers of a current terminal in a terminal identifier sequence in grouping information;

s1903: receiving a data frame sent by network equipment, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal to which the data frame is sent, and the target receiving terminal information is the sequence of terminal identifications of the target receiving terminal in a terminal identification sequence in grouping information;

s1904: and if the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the current terminal, and obtaining the data sent to the current terminal from the data frame.

step S1903 receives a data frame sent by the network device, including: receiving a data frame sent by network equipment on a current unit channel used by a current terminal;

step S1904 acquires data addressed to the current terminal from the data frame, including: and acquiring data sent to the current terminal from the data frame according to a sequence agreed by the network equipment and the current terminal in advance.

step S1904 acquires data addressed to the current terminal from the data frame, including: and acquiring data sent to the current terminal from the data frame according to the sequence agreed by the network equipment and the current terminal in advance.

[ example sixteen ] to

As shown in fig. 20, a data transmission method according to a sixteenth embodiment includes:

s2001: receiving packet information sent by a network device, wherein the packet information comprises: the network equipment divides a plurality of scheduled terminals into a group identifier of each group of a plurality of groups and comprises a terminal identifier sequence corresponding to each group identifier, and the terminal identifier sequence comprises the terminal identifiers of the terminals in the groups identified by the group identifiers which are arranged in sequence;

s2002: determining a current grouping identifier and current terminal information; wherein the current group identifier is: in the grouping information, a grouping identifier corresponding to a terminal identifier of a current terminal; the current terminal information is: in the grouping information, the sequence of the terminal identifier of the current terminal in the terminal identifier sequence corresponding to the current grouping identifier;

s2003: receiving a data frame sent by network equipment, wherein the data frame carries a target grouping identifier and target receiving terminal information; the target grouping identification is the grouping identification of the grouping which the target receiving terminal belongs to and is sent to by the data frame; the target receiving terminal information is the sequence of the terminal identification of the target receiving terminal in the terminal identification sequence corresponding to the group identification of the group to which the target receiving terminal belongs;

s2004: and if the current grouping identifier is the same as the target grouping identifier and the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises the data sent to the current terminal, and acquiring the data sent to the current terminal from the data frame.

step S2003, receiving a data frame sent by the network device, includes: and receiving the data frame sent by the network equipment on the current unit channel used by the current terminal.

in step S2004, acquiring data to be sent to the current terminal from the data frame includes: and acquiring data sent to the current terminal from the data frame according to the sequence agreed by the network equipment and the current terminal in advance.

In summary, the embodiments of the present invention provide a network device, a terminal, and a data transmission method. The network equipment sends packet information of dividing a plurality of terminals into one packet or a plurality of packets to a plurality of scheduled terminals, and if the packet information is divided into one packet, the packet information comprises terminal identification sequences of the plurality of terminals; if the packet information is divided into a plurality of packets, the packet information includes a packet identifier of each packet, and a terminal identifier sequence of each terminal included in the identified packet, corresponding to each packet identifier.

The network equipment sends a data frame to a target receiving terminal which communicates with the network equipment in a plurality of terminals, and if the data frame is divided into a group, the data frame carries target receiving terminal information used for indicating the target receiving terminal, wherein the target receiving terminal information is the sequence of a terminal identifier of the target receiving terminal in the terminal identifier sequence; and if the data frame is divided into a plurality of groups, carrying a target group identifier and target receiving terminal information in the data frame, wherein the target group identifier is the group identifier of the group to which the target receiving terminal belongs, and the target receiving terminal information is the sequence of the terminal identifier of the target receiving terminal in the group information, which is corresponding to the group identifier of the group to which the target receiving terminal belongs.

Based on the scheme, the terminal is identified according to the sequence of the terminal identification of the terminal in the terminal identification sequence, so that the terminal identification occupying more information bits is avoided, and the capacity of the existing signaling information field can meet the communication requirements of a plurality of terminals.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on at least one computer-usable storage medium (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A network device, comprising:

a second sending unit, configured to send a data frame, where the data frame carries target receiving terminal information used for indicating a target receiving terminal, and the target receiving terminal information is an order of a terminal identifier of the target receiving terminal in the terminal identifier sequence;

the network equipment and the plurality of terminals adopt a multi-user multi-input multi-output MU-MIMO mode to carry out data transmission, the plurality of terminals belong to at least one MU-MIMO group, and the terminal identification sequence comprises sequentially arranged MU-MIMO group identifications of the MU-MIMO groups to which the plurality of terminals belong;

2. The network device of claim 1, wherein the grouping information specifically includes: the unit channel identifier of each unit channel used by the plurality of terminals and the terminal identifier sequence of each terminal corresponding to each unit channel identifier and using the unit channel identified by the unit channel identifier are sequentially arranged;

3. The network device of claim 1, wherein the network device performs data transmission with the plurality of terminals in a MU-MIMO manner, the plurality of terminals belong to N MU-MIMO groups, each of the first N-1 MU-MIMO groups includes K terminals of the plurality of terminals, the nth MU-MIMO group includes M terminals of the plurality of terminals, and the total number of the plurality of terminals is K (N-1) + M; in the grouping information, in the terminal identification sequences of the multiple terminals, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to an nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

4. A network device, comprising:

wherein, the target grouping identifier is the grouping identifier of the grouping to which the target receiving terminal belongs, and the target receiving terminal information is: in the grouping information, the terminal identification of the target receiving terminal is in the order in the terminal identification sequence corresponding to the grouping identification of the group to which the target receiving terminal belongs;

the network equipment and the plurality of terminals adopt an MU-MIMO mode to carry out data transmission, each terminal in each group in the plurality of groups belongs to at least one MU-MIMO group, and the terminal identification sequence comprises MU-MIMO group identifications of MU-MIMO groups to which each terminal in the group identified by the group identification in sequence corresponding to each group identification;

5. The network device of claim 4,

in the plurality of groups, the terminals in each group use at least one unit channel, and each terminal using one unit channel belongs to at least one group; the grouping information specifically includes: a group identifier of each group, a unit channel identifier of each unit channel used by each terminal included in the group identified by the group identifier corresponding to each group identifier, and a terminal identifier sequence of each terminal using the unit channel identified by the unit channel identifier in the group identified by the group identifier arranged in sequence corresponding to each unit channel identifier corresponding to each group identifier;

6. The network device of claim 4, wherein the network device performs data transmission with the plurality of terminals in a MU-MIMO manner, and each terminal in each of the plurality of packets belongs to at least one MU-MIMO group;

7. A terminal, comprising:

the processing unit is further to: if the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises data sent to the terminal, and acquiring the data sent to the terminal from the data frame;

8. The terminal according to claim 7, wherein the grouping information specifically includes: the unit channel identifier of each unit channel used by the plurality of terminals and the terminal identifier sequence of each terminal corresponding to each unit channel identifier and using the unit channel identified by the unit channel identifier are sequentially arranged;

9. The terminal of claim 7, wherein the network device performs data transmission with the plurality of terminals in a MU-MIMO manner, the plurality of terminals belong to N MU-MIMO groups, each of the first N-1 MU-MIMO groups includes K terminals of the plurality of terminals, the nth MU-MIMO group includes M terminals of the plurality of terminals, and the total number of the plurality of terminals is K (N-1) + M; in the grouping information, in the terminal identification sequences of the multiple terminals, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to an nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

10. A terminal, comprising:

the processing unit is further to: if the current grouping identification is the same as the target grouping identification and the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises data sent to the terminal, and acquiring the data sent to the terminal from the data frame;

the network device and the plurality of terminals perform data transmission in a multi-user multi-input multi-output (MU-MIMO) mode, each terminal in each group in the plurality of groups belongs to at least one MU-MIMO group, and the terminal identification sequence comprises MU-MIMO group identifications of the MU-MIMO group to which each terminal in the group identified by the group identification belongs, wherein the MU-MIMO group identifications are sequentially arranged;

11. The terminal of claim 10,

12. The terminal of claim 10, wherein the network device performs data transmission with the plurality of terminals in a MU-MIMO manner, and each terminal in each of the plurality of packets belongs to at least one MU-MIMO group;

13. A method of data transmission, comprising:

sending a data frame, wherein the data frame carries target receiving terminal information used for indicating a target receiving terminal, and the target receiving terminal information is the sequence of a terminal identifier of the target receiving terminal in the terminal identifier sequence;

performing data transmission between the current network device and the plurality of terminals in a multi-user multi-input multi-output (MU-MIMO) mode, wherein the plurality of terminals belong to at least one MU-MIMO group, and the terminal identification sequence comprises sequentially arranged MU-MIMO group identifications of the MU-MIMO groups to which the plurality of terminals belong;

14. The method according to claim 13, wherein the grouping information specifically includes: the unit channel identifier of each unit channel used by the plurality of terminals and the terminal identifier sequence of each terminal corresponding to each unit channel identifier and using the unit channel identified by the unit channel identifier are sequentially arranged;

15. The method of claim 13, wherein the current network device performs data transmission with the plurality of terminals in MU-MIMO mode, the plurality of terminals belong to N MU-MIMO groups, each of the first N-1 MU-MIMO groups includes K terminals of the plurality of terminals, the nth MU-MIMO group includes M terminals of the plurality of terminals, and the total number of the plurality of terminals is K (N-1) + M; in the grouping information, in the terminal identification sequences of the multiple terminals, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to an nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

16. A method of data transmission, comprising:

the current network equipment and the plurality of terminals adopt an MU-MIMO mode to carry out data transmission, each terminal in each group in the plurality of groups belongs to at least one MU-MIMO group, corresponding to each group identification, the terminal identification sequence comprises the MU-MIMO group identifications of the MU-MIMO group to which each terminal in the group identified by the group identification belongs, which are arranged in sequence;

17. The method of claim 16,

18. The method of claim 16, wherein the current network device performs data transmission with the plurality of terminals in a MU-MIMO manner, and each terminal in each of the plurality of packets belongs to at least one MU-MIMO group;

19. A method of data transmission, comprising:

if the current terminal information is the same as the target receiving terminal information, determining that a data frame comprises data sent to the current terminal, and obtaining the data sent to the current terminal from the data frame;

20. The method of claim 19, wherein the grouping information specifically includes: the unit channel identifier of each unit channel used by the plurality of terminals and the terminal identifier sequence of each terminal corresponding to each unit channel identifier and using the unit channel identified by the unit channel identifier are sequentially arranged;

21. The method of claim 19, wherein the network device performs data transmission with the plurality of terminals in MU-MIMO mode, the plurality of terminals belong to N MU-MIMO groups, each of the first N-1 MU-MIMO groups includes K terminals of the plurality of terminals, the nth MU-MIMO group includes M terminals of the plurality of terminals, and the total number of the plurality of terminals is K (N-1) + M; in the grouping information, in the terminal identification sequences of the multiple terminals, the K terminals identified by the first K terminal identifications belong to a first MU-MIMO group, the K terminals identified by the next K terminal identifications belong to a second MU-MIMO group, and so on, and the M terminals identified by the last M terminal identifications belong to an nth MU-MIMO group; wherein K, M, N is a positive integer, M is not greater than K;

22. A method of data transmission, comprising:

if the current grouping identification is the same as the target grouping identification and the current terminal information is the same as the target receiving terminal information, determining that the data frame comprises data sent to the current terminal, and acquiring the data sent to the current terminal from the data frame;

23. The method of claim 22,

24. The method of claim 22, wherein the network device performs data transmission with the plurality of terminals in a MU-MIMO manner, and each terminal in each of the plurality of packets belongs to at least one MU-MIMO group;