CN106506128B

CN106506128B - Data transmission method and device

Info

Publication number: CN106506128B
Application number: CN201510562593.5A
Authority: CN
Inventors: 吴伟民; 于健; 郭宇宸; 杨讯; 刘乐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-09-07
Filing date: 2015-09-07
Publication date: 2020-07-07
Anticipated expiration: 2035-09-07
Also published as: WO2017041540A1; CN106506128A

Abstract

The embodiment of the invention discloses a data transmission method, which is used for reducing the overhead of a system. The method provided by the embodiment of the invention comprises the following steps: the data packet sent to the station STA by the AP comprises resource scheduling information and a data field, the resource scheduling information comprises first indication information, the first indication information indicates that the data field comprises a first time block and a second time block, the first time block and the second time block respectively carry MAC frames and are transmitted by adopting the same physical parameters of space-time streams, and the STA analyzes the MAC frames respectively carried by the first time block and the second time block. Therefore, different MAC frame transmission in the same sub-band is realized, the data interaction efficiency of the AP and the STA is improved, and the system overhead is reduced.

Description

Data transmission method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for data transmission.

Background

Orthogonal Frequency Division Multiplexing (OFDM) is a basic transmission method of current Wireless communication, and is widely applied to Wireless communication systems such as Long Term Evolution (Long Term Evolution, LTE), Worldwide Interoperability for Microwave Access (WiMAX), and Wireless Fidelity (WiFi). Moreover, OFDM is further applied to fixed network transmission, such as transmission modes of optical fiber, copper stranded wire, cable, and the like. The basic principle of OFDM is to compress the interval of subcarriers to the minimum within the range allowed by the orthogonality of the subcarriers, so that on one hand, the formation of multiple parallel paths without mutual interference can be ensured, and simultaneously, the frequency utilization efficiency of the system can be improved.

Further, since OFDM has the above characteristics, if non-interfering subcarriers of OFDM are allocated to Multiple users, multi-user Access or data transmission can be achieved by using OFDM, which is Orthogonal Frequency Division Multiple Access (OFDMA). The OFDMA is adopted to realize the parallel transmission of multi-user data, and is an effective way for improving the concurrency of data transmission. For uplink OFDMA transmission, multiple STAs are required to transmit data packets synchronously on different subbands. In order to achieve synchronization, an Access Point (AP) needs to send a trigger Frame to multiple stations (Station), and when the STA receives a Short Frame interval (Short Inter-Frame Space, SIFS) of the trigger Frame or a certain interval (X Inter-Frame Space, XIFS), the STA needs to transmit an uplink data packet immediately.

In one transmission Opportunity (TXOP), the AP may continuously perform downlink and uplink multi-user scheduled transmissions, and for an STA, in one TXOP, the AP needs to Transmit a downlink frame to the AP and ask for an uplink frame from the AP. The AP first transmits a downlink frame to the STA in a downlink transmission. When the STA receives the downlink frame, it needs to transmit the uplink ack block or ack frame immediately. If the AP further wants to request the STA for the uplink frame, it needs to send a trigger frame again, and the STA can transmit the uplink frame after receiving the trigger frame again. It can be seen from the whole process that if the AP and the STA want to complete a complete downlink and uplink data transmission, the AP needs to additionally send a trigger frame, which increases the overhead of the system.

In the prior art, aggregation of Media Access Control (MAC) frames, that is, aggregation of different types of frames is performed by using an aggregation frame aggregation Protocol Data module (MAC Protocol Data Unit, MPDU), where one a-MPDU may include a plurality of a-MPDU subframes, and each a-MPDU subframe carries an MPDU. If the first MPDU is an ack frame and the second MPDU is a Data frame, different types of MAC frames can be simultaneously transmitted.

Since the aggregation is an aggregation at the MAC layer, different types of MAC frames need to use the same physical parameters, such as Modulation and Coding Scheme (MCS), Number of space-Time streams (NSTS), and so on. However, the robustness requirements of the system for the acknowledgement frame are different from those of the data frame, and it is often desirable that the acknowledgement frame be more robust. For example, in designing, it is often desirable that a Packet Error Rate (PER) of an acknowledgment frame be less than 1%; for the data frame, the packet error rate is less than 10%. If two MAC frames with different requirements are aggregated together, only one of them can be moved. If the MCS with a higher false alarm rate is adopted, the acknowledgement frame is not robust enough; if the MCS with a low packet error rate is adopted, the transmission rate of the data frame will be slow, which affects the throughput rate of the system.

Disclosure of Invention

In view of this, embodiments of the present invention provide a method and an apparatus for data transmission, which are used to improve data interaction efficiency between an access point AP and a station STA, and reduce overhead of a system.

A first aspect of an embodiment of the present invention provides a method for data transmission, including:

a station STA receives a data packet sent by an access point AP, wherein the data packet comprises resource scheduling information and a data field, the resource scheduling information comprises physical parameters of space-time stream, the resource scheduling information further comprises first indication information, and the first indication information is used for indicating the number of time blocks contained in the data field on each orthogonal frequency division multiple access OFDMA subband;

when the first indication information indicates that the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames; and the STA analyzes the MAC frames carried by the first time block and the second time block respectively.

With reference to the first aspect of the present embodiment, in a first implementation manner of the first aspect of the present embodiment, the first time block occupies a preset number or an indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols; the method further comprises the following steps:

the STA receives the first time block and the second time block according to the physical parameters of the space-time stream;

the STA receives the data of the first time block according to the preset number or the indicated number of OFDM symbol lengths;

the STA calculates the OFDM symbol length occupied by the second time block according to the total length of the acquired data field and the OFDM symbol length occupied by the first time block in the preset number or the indicated number;

and the STA receives the data of the second time block according to the OFDM symbol length occupied by the second time block.

With reference to the first aspect of the present invention or the first implementation manner of the first aspect, in a second implementation manner of the first aspect of the present invention, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation manner of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

the receiving, by the STA, the MAC frame carried by the second time block includes:

the STA analyzes the MAC frame carried by the second time block according to the physical parameters of the second non-space-time stream;

the receiving, by the STA, the MAC frame carried by the first time block includes:

and the STA analyzes the MAC frame carried by the first time block according to the preset physical parameters of the first non-space-time stream.

With reference to the first aspect of the present invention or the first implementation manner of the first aspect, in a third implementation manner of the first aspect of the present invention, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation manners of MAC frames carried by the first time block and the second time block;

the STA analyzes the MAC frame carried by the first time block according to the physical parameters of the first non-space-time stream;

and the STA analyzes the MAC frame carried by the second time block according to the physical parameters of the second non-space-time stream.

With reference to any one of the first implementation manner of the first aspect, the second implementation manner of the first aspect, and the third implementation manner of the first aspect of the embodiment of the present invention, in a fourth implementation manner of the first aspect of the embodiment of the present invention, the occupying, by the first time block, a preset number of OFDM symbols includes:

the first time block occupies a fixed OFDM symbol number which is preset by the AP for the first time block in advance; or,

the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size in which the data field is transmitted.

With reference to any one of the first implementation manner of the first aspect, the second implementation manner of the first aspect, and the third implementation manner of the first aspect of the present invention, in a fifth implementation manner of the first aspect of the present invention, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

the first time block occupies the number of OFDM symbols of the length indicated by the second indication information.

A second aspect of the embodiments of the present invention provides a method for data transmission, including:

a station STA receives a trigger frame sent by an access point AP, wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

the STA sends a data packet to the AP, the data packet comprises a data field, the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry a Media Access Control (MAC) frame.

With reference to the second aspect of the present embodiment, in a first implementation manner of the second aspect of the present embodiment, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.

With reference to the second aspect of the present invention or the first implementation manner of the second aspect, in a second implementation manner of the second aspect of the present invention, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation manner of a MAC frame carried by the second time block; and the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream.

With reference to the second aspect of the present invention or the first implementation manner of the second aspect, in a third implementation manner of the second aspect of the present invention, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation manners of MAC frames carried by the first time block and the second time block.

With reference to any one of the first implementation manner of the second aspect, the second implementation manner of the second aspect, and the third implementation manner of the second aspect of the embodiment of the present invention, in a fourth implementation manner of the second aspect of the embodiment of the present invention, the occupying, by the first time block, a preset number of OFDM symbols includes:

the first time block occupies a fixed OFDM symbol number which is preset by the STA for the first time block in a default mode; or,

With reference to any one of the first implementation manner of the second aspect, the second implementation manner of the second aspect, and the third implementation manner of the second aspect of the embodiment of the present invention, in a fifth implementation manner of the second aspect of the embodiment of the present invention, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

A third aspect of the embodiments of the present invention provides a method for data transmission, including:

a station STA receives a trigger frame sent by an access point AP, wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams;

the STA sends a data packet to the AP, wherein the data packet comprises a data field and first indication information, and the first indication information is used for indicating the number of time blocks included in the data field;

and when the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames.

With reference to the third aspect of the present embodiment, in a first implementation manner of the third aspect of the present embodiment, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.

With reference to the third aspect of the present invention or the first implementation manner of the third aspect, in a second implementation manner of the third aspect of the present invention, the data packet further includes second indication information, where the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a coding modulation scheme of a corresponding time block.

With reference to the second implementation manner of the third aspect of the present embodiment, in a third implementation manner of the third aspect of the present embodiment, when the second indication information indicates a physical parameter of a non-space-time stream of the first time block, the second time block uses a preset physical parameter of the non-space-time stream; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

With reference to any one of the first implementation manner of the third aspect, the second implementation manner of the third aspect, and the third implementation manner of the third aspect of the embodiment of the present invention, in a fourth implementation manner of the third aspect of the embodiment of the present invention, the occupying, by the first time block, the preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the third aspect, the second implementation manner of the third aspect, and the third implementation manner of the third aspect of the present invention, in a fifth implementation manner of the third aspect of the present invention, the scheduling resource information further includes third indication information, where the third indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

the first time block occupies the number of OFDM symbols of the length indicated by the third indication information.

A fourth aspect of the embodiments of the present invention provides a method for data transmission, including:

the method comprises the steps that an Access Point (AP) sets resource scheduling information in a data packet needing to be sent to a Station (STA), wherein the data packet comprises a data field, the resource scheduling information comprises first indication information, and the first indication information is used for indicating the number of time blocks contained in the data field on each Orthogonal Frequency Division Multiple Access (OFDMA) subband;

when the first indication information indicates that the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames;

and the AP sends the data packet and the resource scheduling information to the STA, so that the STA receives the first time block and the second time block according to the physical parameters of the space-time stream and the physical parameters of the space-time stream.

With reference to the fourth aspect of the present embodiment, in a first implementation manner of the fourth aspect of the present embodiment, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.

With reference to the fourth aspect of the present invention or the first implementation manner of the fourth aspect, in a second implementation manner of the fourth aspect of the present invention, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation manner of a MAC frame carried by the second time block, and the first time block indicates, by using a preset physical parameter of the non-space-time stream, the coding modulation manner of the MAC frame carried by the first time block.

With reference to the fourth aspect of the present invention or the first implementation manner of the fourth aspect, in a third implementation manner of the fourth aspect of the present invention, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation manners of MAC frames carried by the first time block and the second time block.

With reference to any one of the first implementation manner of the fourth aspect, the second implementation manner of the fourth aspect, and the third implementation manner of the fourth aspect of the present invention, in a fourth implementation manner of the fourth aspect of the present invention, the occupying, by the first time block, a preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the fourth aspect, the second implementation manner of the fourth aspect, and the third implementation manner of the fourth aspect of the present invention, in a fifth implementation manner of the fourth aspect of the present invention, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

A fifth aspect of the embodiments of the present invention provides a method for data transmission, including:

an Access Point (AP) sends a trigger frame to a Station (STA), wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

the AP receives a data packet sent by the STA, wherein the data packet comprises a data field, the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry a Media Access Control (MAC) frame; and the AP analyzes the MAC frames respectively carried by the first time block and the second time block.

With reference to the fifth aspect of the present embodiment, in a first implementation manner of the fifth aspect of the present embodiment, the first time block occupies a preset number or an indicated number of OFDM symbols; the method further comprises the following steps:

the AP receives the data of the first time block according to the length of the OFDM symbols with the preset number or the indicated number;

the AP calculates the OFDM symbol length occupied by the second time block according to the total length of the acquired data fields and the OFDM symbol length occupied by the first time block in a preset number or an indicated number;

and the AP receives the data of the second time block according to the OFDM symbol length occupied by the second time block.

With reference to the fifth aspect of the present invention or the first implementation manner of the fifth aspect, in a second implementation manner of the fifth aspect of the present invention, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation manner of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

the AP analyzing the MAC frame carried by the second time block comprises:

the AP analyzes the MAC frame carried by the second time block according to the physical parameters of the second non-space-time stream;

the analyzing, by the AP, the MAC frame carried in the first time block includes:

and the AP analyzes the MAC frame carried by the first time block according to the preset physical parameters of the first non-space-time stream.

With reference to the fifth aspect of the present invention or the first implementation manner of the fifth aspect, in a third implementation manner of the fifth aspect of the present invention, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation manners of MAC frames carried by the first time block and the second time block;

the AP analyzes the MAC frame carried by the first time block according to the physical parameters of the first non-space-time stream;

the AP analyzing the MAC frame carried by the second time block comprises:

and the AP analyzes the MAC frame carried by the second time block according to the physical parameters of the second non-space-time stream.

With reference to any one of the first implementation manner of the fifth aspect, the second implementation manner of the fifth aspect, and the third implementation manner of the fifth aspect of the present invention, in a fourth implementation manner of the fifth aspect of the present invention, the occupying, by the first time block, a preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the fifth aspect, the second implementation manner of the fifth aspect, and the third implementation manner of the fifth aspect of the embodiment of the present invention, in a fifth implementation manner of the fifth aspect of the embodiment of the present invention, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

A sixth aspect of the present invention provides a method for data transmission, including:

an Access Point (AP) sends a trigger frame to a Station (STA), wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams;

the AP receives a data packet sent by the STA, wherein the data packet comprises a data field and first indication information, and the first indication information is used for indicating the number of time blocks included in the data field;

With reference to the sixth aspect of the present embodiment, in a first implementation manner of the sixth aspect of the present embodiment, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.

With reference to the sixth aspect of the present invention or the first implementation manner of the sixth aspect, in a second implementation manner of the sixth aspect of the present invention, the data packet further includes second indication information, where the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a coding modulation manner of a corresponding time block.

With reference to the second implementation manner of the sixth aspect of the present embodiment, in a third implementation manner of the sixth aspect of the present embodiment, when the second indication information indicates a physical parameter of a non-space-time stream of the first time block, the second time block uses a preset physical parameter of the non-space-time stream; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

With reference to any one of the first implementation manner of the sixth aspect, the second implementation manner of the sixth aspect, and the third implementation manner of the sixth aspect of the present invention, in a fourth implementation manner of the sixth aspect of the present invention, the occupying, by the first time block, the preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the sixth aspect, the second implementation manner of the sixth aspect, and the third implementation manner of the sixth aspect of the present invention, in a fifth implementation manner of the sixth aspect of the present invention, the scheduling resource information further includes third indication information, where the third indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

A seventh aspect of the present embodiment provides a station STA, including:

a transceiver module, configured to receive a data packet sent by an access point AP, where the data packet includes resource scheduling information and a data field, where the resource scheduling information includes a physical parameter of a space-time stream, and the resource scheduling information further includes first indication information, and the first indication information is used to indicate a number of time blocks included in the data field on each OFDMA subband;

a processing module, configured to transmit, when the first indication information indicates that the data field includes a first time block and a second time block, the first time block and the second time block both use the same physical parameters of the space-time stream, and the first time block and the second time block carry MAC frames, respectively; the processing module is configured to analyze MAC frames carried by the first time block and the second time block respectively.

With reference to the seventh aspect of the present embodiment, in a first implementation manner of the seventh aspect of the present embodiment, the first time block occupies a preset number or an indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols; the transceiver module is further configured to:

receiving the first time block and the second time block according to physical parameters of the space-time stream;

the processing module is further configured to receive data of the first time block according to the preset number or the indicated number of OFDM symbol lengths;

the processing module is further configured to calculate, according to the obtained total length of the data field and the preset number or the indicated number of OFDM symbol lengths occupied by the first time block, an OFDM symbol length occupied by the second time block;

the processing module is further configured to receive data of the second time block according to the length of the OFDM symbol occupied by the second time block.

With reference to the seventh aspect of the present invention or the first implementation manner of the seventh aspect, in a second implementation manner of the seventh aspect of the present invention, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation manner of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

the processing module is specifically configured to:

analyzing the MAC frame carried by the second time block according to the physical parameters of the second non-space-time stream;

the processing module is specifically further configured to:

and analyzing the MAC frame carried by the first time block according to the preset physical parameters of the first non-space-time stream.

With reference to the seventh aspect of the embodiment of the present invention or the first implementation manner of the seventh aspect, in a third implementation manner of the seventh aspect of the embodiment of the present invention, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation manners of MAC frames carried by the first time block and the second time block;

the processing module is specifically configured to:

analyzing the MAC frame carried by the first time block according to the physical parameters of the first non-space-time stream;

the processing module is specifically further configured to:

and analyzing the MAC frame carried by the second time block according to the physical parameters of the second non-space-time stream.

With reference to any one of the first implementation manner, the second implementation manner, and the third implementation manner of the seventh aspect of the present invention, in a fourth implementation manner of the seventh aspect of the embodiment of the present invention, the occupying, by the first time block, the preset number of OFDM symbols includes:

With reference to any one of the first implementation manner, the second implementation manner, and the third implementation manner of the seventh aspect of the present invention, in a fifth implementation manner of the seventh aspect of the embodiment of the present invention, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

An eighth aspect of the present invention provides a station STA, including:

the access point comprises a receiving and sending module, a sending and receiving module and a sending and receiving module, wherein the receiving and sending module is used for receiving a trigger frame sent by an access point AP, the trigger frame comprises resource scheduling information, and the resource scheduling information comprises a physical parameter of a space-time stream and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

the transceiver module is further configured to send a data packet to the AP, where the data packet includes a data field, the data field includes a first time block and a second time block, the first time block and the second time block both use the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry a MAC frame;

and the processing module is used for controlling the transceiver module to receive the trigger frame sent by the AP and controlling the transceiver module to send the data packet to the AP.

With reference to the eighth aspect of the present embodiment, in a first implementation manner of the eighth aspect of the present embodiment, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.

With reference to the eighth aspect of the present invention or the first implementation manner of the eighth aspect, in a second implementation manner of the eighth aspect of the present invention, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation manner of a MAC frame carried by the second time block; and the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream.

With reference to the eighth aspect of the present invention or the first implementation manner of the eighth aspect, in a third implementation manner of the eighth aspect of the present invention, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation manners of MAC frames carried by the first time block and the second time block.

With reference to any one of the first implementation manner of the eighth aspect, the second implementation manner of the eighth aspect, and the third implementation manner of the eighth aspect of the embodiment of the present invention, in a fourth implementation manner of the eighth aspect of the embodiment of the present invention, the occupying, by the first time block, a preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the eighth aspect, the second implementation manner of the eighth aspect, and the third implementation manner of the eighth aspect of the embodiment of the present invention, in a fifth implementation manner of the eighth aspect of the embodiment of the present invention, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

A ninth aspect of an embodiment of the present invention provides a station STA, including:

the access point comprises a receiving and sending module, a sending and receiving module and a sending and receiving module, wherein the receiving and sending module is used for receiving a trigger frame sent by an access point AP, the trigger frame comprises resource scheduling information, and the resource scheduling information comprises space-time stream physical parameters;

the transceiver module is further configured to transmit a data packet to the AP, where the data packet includes a data field and first indication information, and the first indication information is used to indicate the number of time blocks included in the data field;

when the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames;

With reference to the ninth aspect of the present embodiment, in a first implementation manner of the ninth aspect of the present embodiment, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.

With reference to the ninth aspect of the present invention or the first implementation manner of the ninth aspect, in a second implementation manner of the ninth aspect of the present invention, the data packet further includes second indication information, where the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a coding modulation manner of a corresponding time block.

With reference to the second implementation manner of the ninth aspect of the present embodiment, in a third implementation manner of the ninth aspect of the present embodiment, when the second indication information indicates a physical parameter of a non-space-time stream of the first time block, the second time block uses a preset physical parameter of the non-space-time stream; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

With reference to any one of the first implementation manner of the ninth aspect, the second implementation manner of the ninth aspect, and the third implementation manner of the ninth aspect of the embodiment of the present invention, in a fourth implementation manner of the ninth aspect of the embodiment of the present invention, the occupying, by the first time block, a preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the ninth aspect, the second implementation manner of the ninth aspect, and the third implementation manner of the ninth aspect of the embodiment of the present invention, in a fifth implementation manner of the ninth aspect of the embodiment of the present invention, the scheduling resource information further includes third indication information, where the third indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

A tenth aspect of the embodiments of the present invention provides an access point AP, including:

the processing module is used for setting resource scheduling information in a data packet needing to be sent to a station STA, wherein the data packet comprises a data field, the resource scheduling information comprises first indication information, and the first indication information is used for indicating the number of time blocks contained in the data field on each orthogonal frequency division multiple access OFDMA subband;

a transceiver module, configured to send the data packet and the resource scheduling information to the STA, so that the STA receives the first time block and the second time block according to the physical parameter of the space-time stream.

With reference to the tenth aspect of the present embodiment, in a first implementation manner of the tenth aspect of the present embodiment, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.

With reference to the tenth aspect of the present invention or the first implementation manner of the tenth aspect, in a second implementation manner of the tenth aspect of the present invention, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation manner of a MAC frame carried by the second time block, and the first time block indicates, by using a preset physical parameter of the non-space-time stream, the coding modulation manner of the MAC frame carried by the first time block.

With reference to the tenth aspect of the present invention or the first implementation manner of the tenth aspect, in a third implementation manner of the tenth aspect of the present invention, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation manners of MAC frames carried by the first time block and the second time block.

With reference to any one of the first implementation manner of the tenth aspect, the second implementation manner of the tenth aspect, and the third implementation manner of the tenth aspect of the embodiment of the present invention, in a fourth implementation manner of the tenth aspect of the embodiment of the present invention, the occupying, by the first time block, a preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the tenth aspect, the second implementation manner of the tenth aspect, and the third implementation manner of the tenth aspect of the embodiment of the present invention, in a fifth implementation manner of the tenth aspect of the embodiment of the present invention, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

An eleventh aspect of the present invention provides an access point AP, including:

the receiving and sending module is used for sending a trigger frame to a station STA, wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

the transceiver module is further configured to receive a data packet sent by the STA, where the data packet includes a data field, the data field includes a first time block and a second time block, the first time block and the second time block both use the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry a MAC frame;

and the processing module is used for analyzing the MAC frames carried by the first time block and the second time block respectively.

With reference to the eleventh aspect of the present embodiment, in a first implementation manner of the eleventh aspect of the present embodiment, the first time block occupies a preset number or an indicated number of OFDM symbols; the processing module is further configured to:

receiving the data of the first time block according to the length of the preset number or the indicated number of the OFDM symbols;

the processing module is further configured to calculate, according to the obtained total length of the data field and the length of the OFDM symbols occupied by the first time block in the preset number or the indicated number, the length of the OFDM symbols occupied by the second time block;

With reference to the eleventh aspect of the present invention or the first implementation manner of the eleventh aspect, in a second implementation manner of the eleventh aspect of the present invention, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation manner of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

the processing module is specifically configured to:

the processing module is specifically further configured to:

With reference to the eleventh aspect of the present invention or the first implementation manner of the eleventh aspect, in a third implementation manner of the eleventh aspect of the present invention, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation manners of MAC frames carried by the first time block and the second time block;

the processing module is specifically configured to:

the processing module is specifically further configured to:

With reference to any one of the first implementation manner of the eleventh aspect, the second implementation manner of the eleventh aspect, and the third implementation manner of the eleventh aspect of the embodiment of the present invention, in a fourth implementation manner of the eleventh aspect of the embodiment of the present invention, the occupying, by the first time block, the preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the eleventh aspect, the second implementation manner of the eleventh aspect, and the third implementation manner of the eleventh aspect of the embodiment of the present invention, in a fifth implementation manner of the eleventh aspect of the embodiment of the present invention, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

A twelfth aspect of the present invention provides an access point AP, including:

the receiving and sending module is used for sending a trigger frame to a station STA, wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams;

the transceiver module is further configured to receive a data packet sent by the STA, where the data packet includes a data field and first indication information, and the first indication information is used to indicate the number of time blocks included in the data field;

and the processing module is used for controlling the transceiver module to send a trigger frame to the STA and controlling the transceiver module to receive the data packet sent by the STA.

With reference to the twelfth aspect of the embodiment of the present invention, in a first implementation manner of the twelfth aspect of the embodiment of the present invention, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.

With reference to the twelfth aspect of the present invention or the first implementation manner of the twelfth aspect, in a second implementation manner of the twelfth aspect of the present invention, the data packet further includes second indication information, where the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a coding modulation manner of a corresponding time block.

With reference to the second implementation manner of the twelfth aspect of the embodiment of the present invention, in a third implementation manner of the twelfth aspect of the embodiment of the present invention, when the second indication information indicates a physical parameter of a non-space-time stream of the first time block, the second time block uses a preset physical parameter of the non-space-time stream; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

With reference to any one of the first implementation manner of the twelfth aspect, the second implementation manner of the twelfth aspect, and the third implementation manner of the twelfth aspect of the embodiment of the present invention, in a fourth implementation manner of the twelfth aspect of the embodiment of the present invention, the occupying, by the first time block, a preset number of OFDM symbols includes:

With reference to any one of the first implementation manner of the twelfth aspect, the second implementation manner of the twelfth aspect, and the third implementation manner of the twelfth aspect of the embodiment of the present invention, in a fifth implementation manner of the twelfth aspect of the embodiment of the present invention, the scheduling resource information further includes third indication information, where the third indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

The data transmission method provided by the embodiment of the invention comprises the following steps: the data packet sent to the STA by the AP comprises resource scheduling information and a data field, the resource scheduling information comprises first indication information, the first indication information indicates that the data field comprises a first time block and a second time block, the first time block and the second time block respectively carry MAC frames and are transmitted by adopting the same physical parameters of space-time streams, and the STA analyzes the MAC frames respectively carried by the first time block and the second time block. Therefore, different MAC frame transmission in the same sub-band is realized, the data interaction efficiency of the AP and the STA is improved, and the system overhead is reduced.

Drawings

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

Fig. 1 is a schematic diagram of an embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 2 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 3 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 4 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 5 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 6 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 7 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 8 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 9 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 10 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 11 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

FIG. 12 is a diagram of another embodiment of a method for data transmission according to an embodiment of the present invention;

fig. 13 is a schematic diagram of an embodiment of a station STA according to the present invention;

fig. 14 is a schematic diagram of another embodiment of a station STA according to an embodiment of the present invention;

fig. 15 is a schematic diagram of another embodiment of a station STA according to an embodiment of the present invention;

fig. 16 is a schematic diagram of an embodiment of an access point AP in the embodiment of the present invention;

fig. 17 is a schematic diagram of another embodiment of an access point AP according to the embodiment of the present invention;

fig. 18 is a schematic diagram of another embodiment of an access point AP according to the embodiment of the present invention;

fig. 19 is a diagram of another embodiment of a station STA according to the embodiment of the present invention;

fig. 20 is a schematic diagram of another embodiment of an access point AP according to the embodiment of the present invention.

Detailed Description

The embodiment of the invention designs a data packet with relatively simplified resource scheduling indication by combining the characteristics of the acknowledgement frame. Control frames such as an Acknowledgement (ACK) frame and a Block ACK (BA) frame have the following characteristics:

1. a relatively robust transmission mode is required, and generally needs to operate in an MCS with a low packet error rate, and the number of symbols required for transmitting the MCS is not large due to the small frame length of the MCS.

2. If the parameters such as the number of the space-time streams and the MCS are relatively fixed, the size of the occupied resource block can be relatively fixed, and the number of the occupied symbol number can be indicated without additional resources.

Based on the above characteristics, the embodiment of the present invention designs the data packet structure as follows: the data portion is first divided into a first time block and a second time block, and inside each time block, there is no need for a separate high efficiency Short Training sequence (HE-STF) and a separate high efficiency Long Training sequence (HE-LTF), but HE-STF and HE-LTF are shared. However, since HE-STF and HE-LTF are shared, it is necessary that the first Time Block and the second Time Block all use the same physical parameters of Space-Time streams such as NSTS, Beamforming (BF), Space-Time Block Coding (STBC), and the like, otherwise, one HE-STF and one HE-LTF cannot accurately complete Automatic Gain Control (AGC) and channel estimation of the first Time Block and the second Time Block.

An embodiment of the present invention discloses a method and an apparatus for data transmission, and an embodiment of the method for data transmission provided by the present invention is described in detail below with reference to fig. 2.

In the embodiment of the present invention, the data transmission method includes:

101. a station STA receives a data packet sent by an access point AP, wherein the data packet comprises resource scheduling information and a data field, the resource scheduling information comprises physical parameters of space-time stream, the resource scheduling information further comprises first indication information, and the first indication information is used for indicating the number of time blocks contained in the data field on each orthogonal frequency division multiple access OFDMA subband;

the STA and the AP perform data interaction by transmitting data packets to each other, and in the data packet transmitted by the AP to the STA, the data packet needs to include a data field for transmitting data information and also needs to include resource scheduling information for indicating the data field. The physical parameters of the space-time stream included in the resource scheduling information include parameters such as a space-time stream number NSTS, a beamforming BF, a space-time block code STBC, and the like, and are used for indicating a transmission form of the data field, so that the STA can receive the data field according to the physical parameters of the space-time stream;

the data field is composed of time blocks, and in the embodiment of the present invention, the data field may be composed of a plurality of time blocks, so that first indication information needs to be included in the resource scheduling information, where the first indication information is used to indicate the number of time blocks included in the data field on each OFDMA subband, so that the STA can receive different time blocks in the data field according to the first indication information.

102. When the first indication information indicates that the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, the first time block and the second time block respectively carry Media Access Control (MAC) frames, and the STA analyzes the MAC frames respectively carried by the first time block and the second time block;

when a data field includes a first time block and a second time block, the first time block and the second time block must adopt the same physical parameters of space-time streams for transmission, and then the automatic gain control AGC and channel estimation can be accurately completed for the first time block and the second time block. The first time block and the second time block respectively carry MAC frames, and the MAC frames may be different types of frames, such as acknowledgement frames or data frames. Because the types of the MAC frames carried by the first time block and the second time block respectively may be different, the content and the function of the MAC frames are also different. For example, if the MAC frame is an acknowledgement frame, the MAC frame is used to indicate that the AP has successfully received the data sent by the STA. Since the STA and the AP need to continue to perform high-level data interaction, the STA needs to analyze MAC frames carried by the first time block and the second time block, respectively.

In the embodiment of the present invention, a data packet sent by an AP to an STA includes resource scheduling information and a data field, where the resource scheduling information includes first indication information, and the first indication information indicates that the data field includes a first time block and a second time block, where the first time block and the second time block respectively carry MAC frames and are transmitted by using the same physical parameters of a space-time stream, and the STA analyzes the MAC frames respectively carried by the first time block and the second time block. Therefore, different MAC frame transmission in the same sub-band is realized, the data interaction efficiency of the AP and the STA is improved, and the system overhead is reduced.

In the above embodiment, it is described that the first time block and the second time block respectively carry MAC frames, and in practical application, the resource scheduling information may further include a physical parameter of a non-space-time stream to indicate the MAC frames included in the time blocks, where the length of the OFDM symbol occupied by the first time block may also be notified to the STA by presetting or indicating, which is specifically described below, with reference to fig. 2, another embodiment of the data transmission method in the embodiment of the present invention includes:

201. a station STA receives a data packet sent by an access point AP, wherein the data packet comprises resource scheduling information and a data field, the resource scheduling information comprises physical parameters of space-time stream, the resource scheduling information further comprises first indication information, and the first indication information is used for indicating the number of time blocks contained in the data field on each orthogonal frequency division multiple access OFDMA subband;

the details are described with reference to S101.

202. When the first indication information indicates that the data field includes a first time block and a second time block, the first time block and the second time block both transmit using the same physical parameters of the space-time stream, and the first time block and the second time block respectively carry Media Access Control (MAC) frames, wherein the first time block occupies a preset number or an indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the STA receives the first time block and the second time block according to the physical parameters of the space-time stream;

the first time block occupies a preset number or an indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and when the STA receives data of the time block, the STA needs to receive the data according to the length of the time block. In the prior art, since the data field only contains one time block, the STA can obtain the length of the time block by obtaining the total length of the data field; however, since the data field in the embodiment of the present invention may include more than one data block, it is necessary to set a preset value or separately indicate the length of the first time block, so that the STA can collect the data of the first time block according to the preset number or the indicated number.

Specifically, the first time block may occupy a preset number of OFDM symbols: the first time block occupies a fixed number of OFDM symbols which are preset by the AP for the first time block in advance. That is, before the AP and the STA perform data interaction, the AP and the STA perform protocol agreement or default setting in advance, and both sides can know the OFDM length of the first time block in advance.

Or, the first time block may occupy a preset number of OFDM symbols: the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size in which the data field is transmitted. When there is more than one time block for a certain sub-band, it can be default that the number of OFDM symbols occupied by the first time block in time corresponds to the size of the sub-band in the frequency domain. For example, when the size of the sub-band in the frequency domain is large, for example, one resource block occupies 20MHz, the number of corresponding symbols in the time domain is small, for example, 1 OFDM symbol; when the size of the sub-band in the frequency domain is small, for example, one resource block only occupies 26 sub-carriers, the number of corresponding symbols in the time domain is large, for example, 9 OFDM symbols. In a word, an accurate mapping relationship exists between the size of the sub-band and the number of the OFDM symbols occupied by the first time block, so that when the STA reads the size of the sub-band on the frequency domain of the resource block, the number of the OFDM symbols occupied by the first time block can be calculated.

Or, the scheduling resource information further includes second indication information, where the second indication information is used to indicate the length of the first time block;

the first time block occupies the indicated number of OFDM symbols may be: the first time block occupies the number of OFDM symbols of the length indicated by the second indication information. Optionally, the second indication information may be a field Seg (1) Allocation (Segment (1) Allocation), and the second indication information may explicitly indicate a length of the OFDM symbol occupied by the first time block; the second indication information may also correspond to a subband size in the frequency domain. For example, if the second indication information field adopts 2 bits to indicate the number of OFDM symbols, when the size of the subband is large, such as 20MHz, 00 represents 1 symbol, and 01 represents 2 symbols; if the subband size is small, such as 26 subcarriers, 00 represents 4 symbols and 01 represents 8 symbols. Moreover, the function of indicating whether the data field is a Multi-segment Seg can be implemented by whether the value of Seg (1) Alloc is 0, that is, Seg (1) Alloc is 0, which means that the number of OFDM symbols occupied by the first time block is 0, that is, the absence of the first time block indicates that only one second time block exists in the subband.

It should be noted that, in the embodiment of the present invention, the first time block may include one or more time blocks, and the one or more time blocks included in the first time block are all a preset number or an indicated number of lengths, so that the STA can accurately receive data in the first time block.

203. The STA receives the data of the first time block according to the preset number or the indicated number of OFDM symbol lengths;

after receiving the data packet, the STA can receive data of the first time block according to the preset number or the indicated number of OFDM symbol lengths.

204. The STA calculates the OFDM symbol length occupied by the second time block according to the total length of the acquired data field and the OFDM symbol length occupied by the first time block in the preset number or the indicated number;

when the length of the first time block is a preset number or an indicated number, the STA can determine the length of the first time block, and then the length of the first time block is subtracted from the total length of the acquired data field, so that the OFDM symbol length of the second time block is obtained.

It should be noted that the length of the OFDM symbol occupied by the second time block may also be indicated by one of the indication fields in the resource scheduling information sent by the AP.

205. The STA receives the data of the second time block according to the OFDM symbol length occupied by the second time block;

and after the length of the second time block is obtained, the STA can collect the data of the second time block according to the length of the second time block.

206. The resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream; the STA analyzes the MAC frame carried by the second time block according to the physical parameters of the second non-space-time stream;

after receiving the MAC frames respectively carried in the first time block and the second time block, the STA needs to analyze the MAC frames to obtain detailed indication contents in the MAC frames in order to perform accurate data interaction with the AP. And analyzing the MAC frame, the coding Modulation mode of the MAC needs to be obtained, so in the resource scheduling information, a physical parameter of a second non-space-time stream corresponding to a second time block may be further included, the physical parameter of the second non-space-time stream is used to indicate the coding Modulation mode of the MAC frame carried by the second time block, and the physical parameter of the non-space-time stream may include a Modulation and Coding Scheme (MCS), a Low Density Parity check Code (LDPC), and the like. In this way, the STA may parse the MAC frame carried by the second time block according to the physical parameter of the second non-space-time stream.

And for the physical parameters of the non-space-time stream carried by the first block, a preset MCS and an LPDC can be adopted. For example, for the modulation and coding strategy MCS, MCS0 may be always adopted; for the coding scheme, a Binary Convolutional Code (BCC) coding scheme, i.e., LDPC 0, is used as a default when the size is small in the frequency domain, and LDPC 1, is used as a default when the size is large in the frequency domain.

Optionally, the MAC frame carried in the first time block may also be explicitly indicated by a physical parameter of the first non-space-time stream. That is, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block. In this way, the physical parameter of the first non-space-time stream explicitly indicates the MCS or LDPC of the MAC frame carried by the first time block, optionally, the physical parameter of the first non-space-time stream may also indicate only one modulation and coding parameter of the MAC frame carried by the first time block, for example, only indicate the MCS, and LDPC adopts a default parameter.

207. The STA analyzes the MAC frame carried by the first time block according to the preset physical parameters of the first non-space-time stream;

optionally, when the resource scheduling information further includes a physical parameter of a first non-space-time stream corresponding to the first time block, the STA may analyze the MAC frame carried by the first time block according to the physical parameter of the first non-space-time stream.

In the embodiment of the invention, the length of the OFDM symbol occupied by the first time block can be a preset length, so that the length of the OFDM symbol occupied by the first time block does not need to be indicated in the resource scheduling information sent by the AP, and the overhead of a system is saved; or the length of the first time block is the length indicated by the second indication information in the resource scheduling information, so that the length of the first time block is more flexible. The first time block may adopt a preset physical parameter of the non-space-time stream, so that the resource scheduling information sent by the AP may not indicate the physical parameter of the non-space-time stream of the MAC frame carried by the first time block, and the overhead of the system is also saved.

Referring to fig. 3, another embodiment of the method for data transmission according to the embodiment of the present invention includes:

301. a station STA receives a trigger frame sent by an access point AP, wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

the above embodiments describe that the AP transmits a data packet to the STA to implement downlink transmission in which multiple MAC frames are transmitted in the same sub-band. In uplink transmission, an AP needs to send a trigger frame to an STA first, where the trigger frame includes resource scheduling information, the resource scheduling information includes physical parameters of a space-time stream that the STA needs to use when performing uplink transmission, the resource scheduling information also includes first indication information, and the first indication information needs to indicate that the STA needs to send a first time block and a second time block to the AP on the same OFDMA subband. It should be noted that, because the AP only includes a set of physical parameters of the space-time stream in the trigger frame sent to the STA, the protocol provides that the first time block and the second time block to be sent both use the same physical parameters of the space-time stream when the STA performs uplink transmission.

302. The STA sends a data packet to the AP, wherein the data packet comprises a data field, the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry a Media Access Control (MAC) frame;

the specific content is similar to the content described in S102 where the AP sends the data packet to the STA, and is not described herein again.

In the embodiment of the invention, an AP sends a trigger frame to an STA, the trigger frame comprises physical parameters of a space-time stream, the trigger frame also comprises first indication information, and the first indication information indicates that the STA needs to send a first time block and a second time block to the AP, so that the STA uses the same physical parameters of the space-time stream to transmit the first time block and the second time block in the process of sending a data packet to the AP, and the first time block and the second time block respectively carry MAC frames, thereby realizing uplink transmission of a plurality of MAC frames in the same sub-band, improving the data interaction efficiency of the AP and the STA, and reducing the overhead of a system.

In the above embodiment, it is described that a data packet sent by an STA to an AP includes a first time block and a second time block, where the first time block and the second time block carry MAC frames, and in practical application, the AP may further notify the STA of an OFDM symbol length occupied by the first time block, so that the AP may receive the MAC frames carried by the first time block and the second time block. The AP further needs to analyze the received MAC frame, so that when the AP sends the trigger frame to the STA, the resource scheduling request included in the trigger frame may further include a physical parameter of a non-space-time stream, which is used to indicate a coding and modulation manner used by the STA to send the first time block and the second time block. Specifically, referring to fig. 4, another embodiment of the data transmission method in the embodiment of the present invention includes:

401. a station STA receives a trigger frame sent by an access point AP, wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band; the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

optionally, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, and the physical parameter of the first non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the first time block.

The specific content is similar to that of the STA analyzing the first time block and the second time block according to the physical parameter of the non-space-time stream described in S206, and is not described herein again.

402. The STA sends a data packet to the AP, wherein the data packet comprises a data field, the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, the first time block and the second time block respectively carry a Media Access Control (MAC) frame, and the first time block occupies a preset number or an indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols;

specifically, the first time block may occupy a preset number of OFDM symbols: the first time block occupies a fixed number of OFDM symbols that the STA defaults to the first time block in advance.

Or, the first time block may occupy a preset number of OFDM symbols: the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size in which the data field is transmitted.

the first time block occupies the indicated number of OFDM symbols may be: the first time block occupies the number of OFDM symbols of the length indicated by the second indication information.

Details are described with reference to S202.

Referring to fig. 5, another embodiment of the method for data transmission in the embodiment of the present invention includes:

501. a station STA receives a trigger frame sent by an access point AP, wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams;

when an STA needs to transmit uplink data, the STA first obtains physical parameters of a space-time stream used by an uplink data field, so that the AP needs to transmit a trigger frame to the STA first, where the trigger frame includes the physical parameters of the space-time stream.

502. The STA sends a data packet to the AP, wherein the data packet comprises a data field and first indication information, and the first indication information is used for indicating the number of time blocks included in the data field; when the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames;

when the number of time blocks included in the data field indicating that the STA needs to transmit is not included in the trigger frame transmitted by the AP, the STA may autonomously determine the number of time blocks included in the data field that needs to be transmitted. And when the STA determines the number of the time blocks included in the data field needing to be sent, indicating the number of the time blocks included in the data field sent by the STA to the AP by sending the first indication information.

The details are described with reference to S302.

In the embodiment of the invention, the same space-time stream parameters are adopted for receiving and transmitting in more than one time block of the same sub-band, so that the time reuse transmission mode is realized under the conditions of complex realization and low overhead, and the transmission efficiency and the throughput rate of the system are improved. And the mode of combining the second-order indication realizes the scheme that the STA autonomously determines the number of the time blocks and the physical parameters of the non-space-time stream of each time block, and avoids the waste of resources caused by the fact that the AP does not know the buffer memory and the channel condition of the STA.

The above embodiments describe that the second indication information indicates a physical parameter of a non-space-time stream of the first time block and/or the second time block. In practical application, when the second indication information only indicates the physical parameters of the non-space-time stream of one of the time blocks, the physical parameters of the non-space-time stream of the other time block adopt preset physical parameters of the non-space-time stream, which is described in detail below.

601. A station STA receives a trigger frame sent by an access point AP, wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams;

the details are described with reference to S501.

602. The STA sends a data packet to the AP, wherein the data packet comprises a data field and first indication information, and the first indication information is used for indicating the number of time blocks included in the data field; when the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames, wherein the first time block occupies a preset number or an indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols;

Or, the scheduling resource information further includes third indication information, where the third indication information is used to indicate the length of the first time block;

details are described with reference to S202.

The first time block occupies the indicated number of OFDM symbols may be: the first time block occupies the number of OFDM symbols of the length indicated by the third indication information.

The specific content is similar to the content of the OFDM symbol data whose length is indicated by the second indication information occupied by the first time block described in S402, and is not described herein again.

Optionally, the data packet further includes second indication information, where the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a coding modulation mode of a corresponding time block; when the second indication information indicates the physical parameters of the non-space-time stream of the first time block, the second time block adopts preset physical parameters of the non-space-time stream; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream;

the STA may autonomously determine physical parameters of the non-space-time stream and may carry the physical parameters through one or more High efficiency signaling Field fields (High efficiency-Signal Field-C, english abbreviation: HE-SIG-C). The AP indicates the resource location in the frequency domain of each STA, such as the location and size of the sub-band in the frequency domain, and indicates the spatial stream through the trigger frame. The STA can know the frequency domain and spatial location occupied by the transmitted data at the time of its uplink transmission. And for the stream parameters of the non-space-time stream, such as MCS, LDPC and other parameters, the stream parameters can be carried by one or more HE-SIG-cs. In addition, several transmission time blocks can be indicated by the HE-SIG-C/C1, so that the number of transmission time blocks can be autonomously determined.

In the embodiment of the invention, STA utilizes an efficient signaling field HE-SIG-B field or a trigger frame to complete the indication of a part of resource scheduling information, and also completes the indication of physical parameters of non-space-time streams such as LDPC, MCS and the like through one or more HE-SIG-C, so that the scheme of the invention is called as molecular band second-order indication. By the method, whether uplink transmission of a plurality of MAC frames is carried out or not can be determined by the STA independently.

The HE-SIG-B/trigger frame carries resource scheduling information related to frequency domain position and space-time flow, and the HE-SIG-C carries parameter information unrelated to space-time flow. The indications of the multiple time blocks may be present in the HE-SIG-B/trigger frame, or may be carried in one or more HE-SIG-C frames. The also field Seg (1) Alloc in the data packet may also optionally be present and may indirectly be used to indicate whether more than one time block is present. If only one HE-SIG-C exists, parameters such as MCS and LDPC of two time blocks are indicated at the same time.

The first time block is not limited to one time block, the first time blocks may be multiple, the second time blocks are not limited to one time block, the second time blocks may also be multiple, the second indication information is not limited to one piece of indication information, and the second indication information may be indication information of a number corresponding to the first time block and/or the second time block.

The physical parameters of the non-space-time stream at a certain time block can adopt preset default values; if a plurality of HE-SIG-C exist, the HE-SIG-C before each time block indicates the physical parameters of the non-space-time stream such as MCS and LDPC, etc. of each time block, and the HE-SIG-C can be used to carry the parameters of the size of the time block. The specific content is similar to the content of the first time block described in S206, which uses the preset MCS and physical parameters of the non-space-time stream such as LDPC, and is not described herein again.

In the embodiment of the invention, the length of the OFDM symbol occupied by the first time block can be a preset length, so that the length of the OFDM symbol occupied by the first time block does not need to be indicated in the resource scheduling information sent by the AP, and the overhead of a system is saved; or the length of the first time block is the length indicated by the third indication information in the resource scheduling information, so that the length of the first time block is more flexible. The first time block or the second time block may adopt a preset physical parameter of the non-space-time stream, so that the resource scheduling information sent by the AP may not indicate the physical parameter of the non-space-time stream of the MAC frame carried by the first time block or the second time block, which also saves the overhead of the system.

Referring to fig. 7, another embodiment of the data transmission method according to the embodiment of the present invention includes:

701. the method comprises the steps that an Access Point (AP) sets resource scheduling information in a data packet needing to be sent to a Station (STA), wherein the data packet comprises a data field, the resource scheduling information comprises first indication information, and the first indication information is used for indicating the number of time blocks contained in the data field on each Orthogonal Frequency Division Multiple Access (OFDMA) subband;

the details are described with reference to S101.

702. When the first indication information indicates that the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames; the AP sends the data packet and the resource scheduling information to the STA, so that the STA receives the first time block and the second time block according to the physical parameters of the space-time stream and the physical parameters of the space-time stream;

the details are described with reference to S102.

Referring to fig. 8, another embodiment of the method for data transmission according to the embodiment of the present invention includes:

801. the method comprises the steps that an Access Point (AP) sets resource scheduling information in a data packet needing to be sent to a Station (STA), wherein the data packet comprises a data field, the resource scheduling information comprises first indication information, and the first indication information is used for indicating the number of time blocks contained in the data field on each Orthogonal Frequency Division Multiple Access (OFDMA) subband;

the details are described with reference to S101.

802. When the first indication information indicates that the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames; the AP sends the data packet and the resource scheduling information to the STA, so that the STA receives the first time block and the second time block according to the physical parameters of the space-time stream and the physical parameters of the space-time stream; the first time block occupies a preset number or an indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols;

specifically, the first time block occupying a preset number of OFDM symbols includes:

the first time block occupies the indicated number of OFDM symbols comprising:

Details are described with reference to S202.

Optionally, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block, and the first time block uses a preset physical parameter of the non-space-time stream to indicate a coding modulation mode of a MAC frame carried by the first time block.

Optionally, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation modes of MAC frames carried by the first time block and the second time block.

The details are described with reference to S206.

Referring to fig. 9, another embodiment of the method for data transmission according to the embodiment of the present invention includes:

901. an Access Point (AP) sends a trigger frame to a Station (STA), wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

details are described with reference to S301.

902. The AP receives a data packet sent by the STA, wherein the data packet comprises a data field, the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry a Media Access Control (MAC) frame; the AP analyzes the MAC frames respectively carried by the first time block and the second time block;

the specific content is similar to the content of the MAC frame carried by the STA analyzing the first time block and the second time block respectively in S102, which is not described herein again.

Referring to fig. 10, another embodiment of the method for data transmission according to the embodiment of the present invention includes:

1001. an Access Point (AP) sends a trigger frame to a Station (STA), wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

details are described with reference to S301.

1002. The AP receives a data packet sent by the STA, wherein the data packet comprises a data field, the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry a Media Access Control (MAC) frame; the first time block occupies a preset number or an indicated number of OFDM symbols; the AP receives the first time block and the second time block according to the physical parameters of the space-time stream;

the details are similar to those of the STA described in S202 receiving the first time block and the second time block according to the physical parameters of the space-time stream, and are not repeated here.

1003. The AP receives the data of the first time block according to the preset number or the indicated number of OFDM symbol lengths;

the detailed content is similar to that of the data content of the first time block, which is received by the STA according to the preset number or the indicated number of OFDM symbol lengths, which is described in S203, and is not described herein again.

1004. The AP calculates the OFDM symbol length occupied by the second time block according to the total length of the acquired data fields and the OFDM symbol length occupied by the first time block in a preset number or an indicated number;

the specific content is similar to the content of the OFDM symbol length occupied by the second time block obtained by the STA according to the obtained total length of the data field and the preset number occupied by the first time block or the OFDM symbol length of the indicated number, which is described in S204 and is not described herein again.

1005. The AP receives the data of the second time block according to the OFDM symbol length occupied by the second time block;

the specific content is similar to the content described in S205 in which the STA receives the data of the second time block according to the OFDM symbol length occupied by the second time block, and is not described herein again.

1006. The resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream; the AP analyzes the MAC frame carried by the second time block according to the physical parameters of the second non-space-time stream;

the specific content is similar to that of the MAC frame carried by the STA analyzing the second time block according to the physical parameter of the second non-space-time stream described in S206, and is not described herein again.

1007. The AP analyzes the MAC frame carried by the first time block according to the physical parameters of the preset first non-space-time stream;

the specific content is similar to that of the MAC frame carried in the first time block analyzed by the STA according to the preset physical parameter of the first non-space-time stream described in S207, and is not described herein again.

Referring to fig. 11, another embodiment of the method for data transmission according to the embodiment of the present invention includes:

1101. an Access Point (AP) sends a trigger frame to a Station (STA), wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams;

the details are described with reference to S501.

1102. The AP receives a data packet sent by the STA, wherein the data packet comprises a data field and first indication information, and the first indication information is used for indicating the number of time blocks included in the data field; when the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames;

the details are described with reference to S502.

Referring to fig. 12, another embodiment of the method for data transmission according to the embodiment of the present invention includes:

1201. an Access Point (AP) sends a trigger frame to a Station (STA), wherein the trigger frame comprises resource scheduling information, and the resource scheduling information comprises physical parameters of space-time streams;

the details are described with reference to S601.

1202. The AP receives a data packet sent by the STA, wherein the data packet comprises a data field and first indication information, and the first indication information is used for indicating the number of time blocks included in the data field; when the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same physical parameters of the space-time stream for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames; wherein the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing, OFDM, symbols;

details are described with reference to S602.

Referring to fig. 13, an embodiment of a station STA in the embodiment of the present invention includes:

a transceiver module 1301, configured to receive a data packet sent by an access point AP, where the data packet includes resource scheduling information and a data field, the resource scheduling information includes a physical parameter of a space-time stream, and the resource scheduling information further includes first indication information, and the first indication information is used to indicate a number of time blocks included in the data field on each OFDMA subband;

the details are described with reference to S101.

A processing module 1302, configured to, when the first indication information indicates that the data field includes a first time block and a second time block, transmit the first time block and the second time block by using the same physical parameter of the space-time stream, where the first time block and the second time block carry MAC frames, respectively; the processing module 1302 is configured to analyze MAC frames carried by the first time block and the second time block respectively;

the details are described with reference to S102.

Optionally, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing, OFDM, symbols; the transceiver module 1301 is further configured to:

details are described with reference to S202.

The processing module 1302 is further configured to receive data of the first time block according to the preset number or the indicated number of OFDM symbol lengths;

the details are described with reference to S203.

The processing module 1302 is further configured to calculate, according to the obtained total length of the data field and the OFDM symbol length occupied by the first time block in the preset number or the indicated number, the OFDM symbol length occupied by the second time block;

the details are described with reference to S204.

The processing module 1302 is further configured to receive data of the second time block according to the length of the OFDM symbol occupied by the second time block;

the details are described with reference to S205.

Optionally, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

the processing module 1302 is specifically configured to:

the details are described with reference to S206.

The processing module 1302 is further specifically configured to:

analyzing the MAC frame carried by the first time block according to the physical parameters of the preset first non-space-time stream;

details are described with reference to S207.

Optionally, the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, where the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used to indicate coding modulation modes of MAC frames carried by the first time block and the second time block;

the processing module 1302 is specifically configured to:

the processing module 1302 is further specifically configured to:

details are described with reference to S206 to S207.

Optionally, the first time block occupying a preset number of OFDM symbols includes:

Optionally, the scheduling resource information further includes second indication information, where the second indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

Details are described with reference to S02.

Referring to fig. 14, another embodiment of a station STA according to the embodiment of the present invention includes:

a transceiver module 1401, configured to receive a trigger frame sent by an access point AP, where the trigger frame includes resource scheduling information, and the resource scheduling information includes a physical parameter of a space-time stream and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

details are described with reference to S301.

The transceiver module 1401 is further configured to send a data packet to the AP, where the data packet includes a data field, and the data field includes a first time block and a second time block, where the first time block and the second time block both use the same physical parameter of the space-time stream for transmission, and the first time block and the second time block respectively carry a MAC frame;

the details are described with reference to S302.

A processing module 1402, configured to control the transceiver module 1401 to receive the trigger frame sent by the AP, and control the transceiver module 1401 to send a data packet to the AP.

Optionally, the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing, OFDM, symbols.

Optionally, the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, where the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; and the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream.

Details are described with reference to S401.

the first time block occupies the indicated number of OFDM symbols comprising:

Details are described with reference to S401.

Referring to fig. 15, another embodiment of a station STA according to the embodiment of the present invention includes:

a transceiver module 1501, configured to receive a trigger frame sent by an access point AP, where the trigger frame includes resource scheduling information, and the resource scheduling information includes a physical parameter of a space-time stream;

the details are described with reference to S501.

The transceiver module 1501 is further configured to transmit a data packet to the AP, where the data packet includes a data field and first indication information, and the first indication information is used to indicate the number of time blocks included in the data field;

the details are described with reference to S502.

A processing module 1502, configured to control the transceiver module to receive the trigger frame sent by the AP, and control the transceiver module to send a data packet to the AP.

Optionally, the data packet further includes second indication information, where the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a coding modulation scheme of the corresponding time block.

Optionally, when the second indication information indicates a physical parameter of a non-space-time stream of the first time block, the second time block adopts a preset physical parameter of the non-space-time stream; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

Optionally, the scheduling resource information further includes third indication information, where the third indication information is used to indicate a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

Details are described with reference to S602.

Referring to fig. 16, an embodiment of an access point AP in the embodiment of the present invention includes:

a processing module 1602, configured to set resource scheduling information in a data packet that needs to be sent to a station STA, where the data packet includes a data field, and the resource scheduling information includes first indication information, where the first indication information is used to indicate a number of time blocks included in the data field on each OFDMA subband;

details are described with reference to S701.

a transceiver module 1601, configured to send the data packet and the resource scheduling information to the STA, so that the STA receives the first time block and the second time block according to a physical parameter of the space-time stream;

details are described with reference to S702.

the first time block occupies the indicated number of OFDM symbols comprising:

Details are described with reference to S802.

Referring to fig. 17, another embodiment of an access point AP in the embodiment of the present invention includes:

a transceiver module 1701, configured to send a trigger frame to a station STA, where the trigger frame includes resource scheduling information, and the resource scheduling information includes a physical parameter of a space-time stream and first indication information; the first indication information is used for indicating that the STA needs to send a first time block and a second time block to the AP in the same Orthogonal Frequency Division Multiple Access (OFDMA) sub-band;

the details are described with reference to S901.

The transceiver module 1701 is further configured to receive a data packet sent by the STA, where the data packet includes a data field, the data field includes a first time block and a second time block, the first time block and the second time block both use the same physical parameter of the space-time stream for transmission, and the first time block and the second time block respectively carry a MAC frame;

a processing module 1702, configured to analyze the MAC frames carried in the first time block and the second time block respectively.

The details are described with reference to S902.

Optionally, the first time block occupies a preset number or an indicated number of OFDM symbols; the processing module 1702 is further configured to:

the details are described with reference to S1003.

The processing module 1702 is further configured to calculate, according to the obtained total length of the data field and the OFDM symbol length of the preset number or the indicated number occupied by the first time block, to obtain the OFDM symbol length occupied by the second time block;

the details are described with reference to S1004.

The processing module 1702 is further configured to receive data of the second time block according to the OFDM symbol length occupied by the second time block.

The details are described with reference to S1005.

the processing module 1702 is specifically configured to:

the processing module 1702 is further specifically configured to:

the processing module 1702 is specifically configured to:

the processing module 1702 is further specifically configured to:

Details are described with reference to S1006 to S1007.

the first time block occupies the indicated number of OFDM symbols comprising:

The details are described with reference to S1004 to 1005.

Referring to fig. 18, another embodiment of an access point AP according to the embodiment of the present invention includes:

a transceiving module 1801, configured to send a trigger frame to a station STA, where the trigger frame includes resource scheduling information, and the resource scheduling information includes a physical parameter of a space-time stream;

the details are described with reference to S1101.

The transceiver module 1801 is further configured to receive a data packet sent by the STA, where the data packet includes a data field and first indication information, and the first indication information is used to indicate the number of time blocks included in the data field;

the details are described with reference to S1102.

A processing module 1802, configured to control the transceiver module 1801 to send a trigger frame to the STA, and control the transceiver module 1801 to receive a data packet sent by the STA.

the first time block occupies the indicated number of OFDM symbols comprising:

The details are described with reference to S1202.

Fig. 19 is another structural diagram of a station STA according to an embodiment of the present invention. The STA may include at least one receiver 1901, at least one transmitter 1902, at least one processor 1903, and memory 1904.

The STAs to which embodiments of the invention relate may have more or fewer components than those shown in fig. 19, may combine two or more components, or may have different configurations or arrangements of components, each of which may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.

Specifically, the transmitter 1902 may implement the functions of the transceiver module 1301 in the embodiment of fig. 13, the transceiver module 1401 in the embodiment of fig. 14, and the transceiver module 1501 in the embodiment of fig. 15 to perform the transmitting operation;

the receiver 1901 may implement the function of the transceiver module 1301 in the embodiment of fig. 13, the transceiver module 1401 in the embodiment of fig. 14, and the transceiver module 1501 in the embodiment of fig. 15 to perform receiving operation;

the processor 1903 may implement the functions of the processing module 1302 described in the embodiment of fig. 13, the processing module 1402 described in the embodiment of fig. 14, and the processing module 1502 described in the embodiment of fig. 15.

Fig. 20 is another schematic structural diagram of an access point AP according to an embodiment of the present invention. The AP may include at least one receiver 2001, at least one transmitter 2002, at least one processor 2003, and memory 2004.

Embodiments of the invention may involve an AP having more or fewer components than shown in fig. 20, may combine two or more components, or may involve different configurations or arrangements of components, and each component may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.

Specifically, the transmitter 2002 may implement the functions of the transceiver module 1601 described in the embodiment of fig. 16, the transceiver module 1701 described in the embodiment of fig. 17, and the transceiver module 1801 described in the embodiment of fig. 18 to perform the transmitting operation;

the receiver 2001 may implement the functions of the transceiver module 1601 described in the embodiment of fig. 16, the transceiver module 1701 described in the embodiment of fig. 17, and the transceiver module 1801 described in the embodiment of fig. 18 to perform receiving operations;

the processor 2003 may implement the functionality of the processing module 1602 described in the embodiment of FIG. 16, the processing module 1702 described in the embodiment of FIG. 17, and the processing module 1802 described in the embodiment of FIG. 18.

It should be noted that, the apparatuses used in the description of the present invention are the base station eNB and the user equipment UE, and in practical cases, the present invention is also applicable to other apparatuses in the peer-to-peer network.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method of data transmission, the method comprising:

2. The method of claim 1, wherein the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing, OFDM, symbols; the method further comprises the following steps:

3. The method according to claim 1 or 2, wherein the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, and the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

4. The method according to claim 1 or 2, wherein the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used for indicating a coding modulation mode of a MAC frame carried by the first time block and the second time block;

5. The method of claim 2, wherein the first time block occupies a preset number of OFDM symbols comprising:

6. The method according to claim 2, wherein the resource scheduling information further comprises second indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

7. A method of data transmission, the method comprising:

8. The method of claim 7, wherein the first time block occupies a preset or indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols.

9. The method according to claim 7 or 8, wherein the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, and the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; and the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream.

10. The method according to claim 7 or 8, wherein the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used for indicating a coding modulation mode of a MAC frame carried by the first time block and the second time block.

11. The method of claim 8, wherein the first time block occupies a preset number of OFDM symbols comprising:

12. The method according to claim 8, wherein the resource scheduling information further comprises second indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

13. A method of data transmission, the method comprising:

14. The method of claim 13, wherein the first time block occupies a preset or indicated number of orthogonal frequency division multiplexing, OFDM, symbols.

15. The method according to claim 13 or 14, wherein the data packet further includes second indication information, the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a code modulation mode of the corresponding time block.

16. The method according to claim 15, wherein when the second indication information indicates physical parameters of a non-space-time stream of the first time block, the second time block adopts preset physical parameters of the non-space-time stream; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

17. The method of claim 14, wherein the first time block occupies a preset number of OFDM symbols comprising:

18. The method of claim 14, wherein the resource scheduling information further comprises third indication information, and wherein the third indication information is used for indicating the length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

19. A method of data transmission, the method comprising:

when the first indication information indicates that the data field comprises a first time block and a second time block, the first time block and the second time block both adopt the same space-time stream physical parameters for transmission, and the first time block and the second time block respectively carry Media Access Control (MAC) frames;

and the AP sends the data packet and the resource scheduling information to the STA so that the STA receives the first time block and the second time block according to the physical parameters of the space-time stream.

20. The method of claim 19, wherein the first time block occupies a preset or indicated number of orthogonal frequency division multiplexing, OFDM, symbols.

21. The method according to claim 19 or 20, wherein the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, the physical parameter of the second non-space-time stream is used to indicate a code modulation manner of the MAC frame carried by the second time block, and the first time block indicates the code modulation manner of the MAC frame carried by the first time block by using a preset physical parameter of the non-space-time stream.

22. The method according to claim 19 or 20, wherein the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used for indicating a coding modulation mode of a MAC frame carried by the first time block and the second time block.

23. The method of claim 20, wherein the first time block occupies a preset number of OFDM symbols comprising:

24. The method of claim 20, wherein the resource scheduling information further comprises second indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

25. A method of data transmission, the method comprising:

26. The method of claim 25, wherein the first time block occupies a preset or indicated number of OFDM symbols; the method further comprises the following steps:

27. The method according to claim 25 or 26, wherein the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, and the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

the AP analyzing the MAC frame carried by the second time block comprises:

28. The method according to claim 25 or 26, wherein the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used for indicating a coding modulation mode of a MAC frame carried by the first time block and the second time block;

the AP analyzing the MAC frame carried by the second time block comprises:

29. The method of claim 26, wherein the first time block occupies a preset number of OFDM symbols comprising:

30. The method of claim 26, wherein the resource scheduling information further comprises second indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

31. A method of data transmission, the method comprising:

32. The method of claim 31, wherein the first time block occupies a preset or indicated number of orthogonal frequency division multiplexing, OFDM, symbols.

33. The method according to claim 31 or 32, wherein the data packet further includes second indication information, the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a code modulation mode of the corresponding time block.

34. The method according to claim 33, wherein when the second indication information indicates physical parameters of non-space-time streams of the first time block, the second time block adopts preset physical parameters of non-space-time streams; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

35. The method of claim 32, wherein the first time block occupies a preset number of OFDM symbols comprising:

36. The method of claim 32, wherein the resource scheduling information further comprises a third indication information, and wherein the third indication information is used for indicating the length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

37. A Station (STA), the STA comprising:

38. The STA of claim 37, wherein the first time block occupies a preset or indicated number of orthogonal frequency division multiplexing, OFDM, symbols; the transceiver module is further configured to:

39. The STA of claim 37 or 38, wherein the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, and the physical parameter of the second non-space-time stream is used to indicate a coding modulation scheme of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

the processing module is specifically configured to:

the processing module is specifically further configured to:

40. The STA of claim 37 or 38, wherein the resource scheduling information further includes a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used for indicating a coding modulation mode of a MAC frame carried by the first time block and the second time block;

the processing module is specifically configured to:

the processing module is specifically further configured to:

41. The STA of claim 38, wherein the first time block occupies a preset number of OFDM symbols comprising:

42. The STA of claim 38, wherein the resource scheduling information further includes second indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

43. A Station (STA), the STA comprising:

44. The STA of claim 43, wherein the first time block occupies a preset or indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols.

45. The STA of claim 43 or 44, wherein the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, and the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; and the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream.

46. The STA of claim 43 or 44, wherein the resource scheduling information further comprises physical parameters of a first non-space-time stream and physical parameters of a second non-space-time stream, the physical parameters of the first non-space-time stream correspond to the first time block, the physical parameters of the second non-space-time stream correspond to the second time block, and the physical parameters of the first non-space-time stream and the physical parameters of the second non-space-time stream are respectively used for indicating the code modulation modes of the MAC frames carried by the first time block and the second time block.

47. The STA of claim 44, wherein the first time block occupies a preset number of OFDM symbols comprising:

48. The STA of claim 44, wherein the resource scheduling information further comprises second indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

49. A Station (STA), the STA comprising:

50. The STA of claim 49, wherein the first time block occupies a preset or indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols.

51. The STA of claim 49 or 50, wherein the data packet further comprises second indication information, the second indication information is used to indicate a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used to indicate a code modulation mode of the corresponding time block.

52. The STA of claim 51, wherein the second time block adopts preset physical parameters of non-space-time streams when the second indication information indicates the physical parameters of the non-space-time streams of the first time block; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

53. The STA of claim 50, wherein the first time block occupies a preset number of OFDM symbols comprising:

54. The STA of claim 50, wherein the resource scheduling information further comprises third indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

55. An access point, AP, comprising:

a transceiver module, configured to send the data packet and the resource scheduling information to the STA, so that the STA receives the first time block and the second time block according to physical parameters of the space-time stream.

56. The AP of claim 55, wherein the first time block occupies a preset or indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols.

57. The AP of claim 55 or 56, wherein the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, the physical parameter of the second non-space-time stream is used to indicate a code modulation manner of a MAC frame carried by the second time block, and the first time block indicates the code modulation manner of the MAC frame carried by the first time block by using a preset physical parameter of the non-space-time stream.

58. The AP of claim 55 or 56, wherein the resource scheduling information further comprises a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used for indicating the coding and modulation modes of the MAC frames carried by the first time block and the second time block.

59. The AP of claim 56, wherein the first time block occupies a preset number of OFDM symbols comprising:

60. The AP of claim 56, wherein the resource scheduling information further comprises second indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

61. An access point, AP, comprising:

62. The AP of claim 61, wherein the first time block occupies a preset or indicated number of OFDM symbols; the processing module is further configured to:

63. The AP of claim 61 or 62, wherein the resource scheduling information further includes a physical parameter of a second non-space-time stream corresponding to the second time block, and the physical parameter of the second non-space-time stream is used to indicate a coding modulation mode of a MAC frame carried by the second time block; the first time block indicates a coding modulation mode of an MAC frame carried by the first time block by adopting a preset physical parameter of a first non-space-time stream;

the processing module is specifically configured to:

the processing module is specifically further configured to:

64. The AP of claim 61 or 62, wherein the resource scheduling information further comprises a physical parameter of a first non-space-time stream and a physical parameter of a second non-space-time stream, the physical parameter of the first non-space-time stream corresponds to the first time block, the physical parameter of the second non-space-time stream corresponds to the second time block, and the physical parameter of the first non-space-time stream and the physical parameter of the second non-space-time stream are respectively used for indicating the coding modulation modes of the MAC frames carried by the first time block and the second time block;

the processing module is specifically configured to:

the processing module is specifically further configured to:

65. The AP of claim 62, wherein the first time block occupies a preset number of OFDM symbols comprising:

66. The AP of claim 62, wherein the resource scheduling information further comprises second indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising:

67. An access point, AP, comprising:

68. The AP of claim 67, wherein the first time block occupies a preset or indicated number of Orthogonal Frequency Division Multiplexing (OFDM) symbols.

69. The AP of claim 67 or 68, wherein the data packet further comprises second indication information, the second indication information is used for indicating a physical parameter of a non-space-time stream of the first time block and/or the second time block, and the physical parameter of the non-space-time stream is used for indicating a code modulation mode of the corresponding time block.

70. The AP of claim 69, wherein when the second indication information indicates physical parameters of non-space-time streams of the first time block, the second time block adopts preset physical parameters of non-space-time streams; when the second indication information indicates the physical parameters of the non-space-time stream of the second time block, the first time block adopts preset physical parameters of the non-space-time stream.

71. The AP of claim 68, wherein the first time block occupies a preset number of OFDM symbols comprising:

72. The AP of claim 68, wherein the resource scheduling information further comprises third indication information indicating a length of the first time block;

the first time block occupies the indicated number of OFDM symbols comprising: