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WO2017041540A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2017041540A1
WO2017041540A1 PCT/CN2016/084274 CN2016084274W WO2017041540A1 WO 2017041540 A1 WO2017041540 A1 WO 2017041540A1 CN 2016084274 W CN2016084274 W CN 2016084274W WO 2017041540 A1 WO2017041540 A1 WO 2017041540A1
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Prior art keywords
time block
time
stream
empty
indication information
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PCT/CN2016/084274
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English (en)
Chinese (zh)
Inventor
吴伟民
于健
郭宇宸
杨讯
刘乐
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for data transmission.
  • Orthogonal Frequency Division Multiplexing is the basic transmission method of current wireless communication. It is widely used in Long Term Evolution (LTE) and Worldwide Interoperability. For Microwave Access, English abbreviation: WiMAX), Wireless Fidelity (Acronym: WiFi) and other wireless communication systems. Not only that, OFDM is further applied to fixed network transmission, such as optical fiber, copper stranded wire, cable and other transmission methods.
  • the basic principle of OFDM is to reduce the subcarrier spacing to a minimum within the range allowed by the orthogonality of subcarriers. This aspect can ensure the formation of multiple parallel and non-interfering paths, and at the same time improve the frequency utilization efficiency of the system. .
  • OFDM has the above characteristics, if OFDM non-interfering subcarriers are allocated to multiple users, OFDM can be used to implement multi-user access or data transmission, which is orthogonal frequency division multiple access (Orthogonal). Frequency Division Multiple Access, English abbreviation: OFDMA).
  • OFDMA Frequency Division Multiple Access
  • the use of OFDMA can realize parallel transmission of multi-user data, which is an effective way to improve the concurrency of data transmission.
  • multiple STAs are required to simultaneously transmit data packets on different subbands.
  • the Access Point needs to send a trigger frame to multiple stations (Station, English abbreviation: STA), and when the STA receives the short frame interval of the trigger frame (Short Inter-Frame Space (English abbreviation: SIFS) or a certain interval (X Inter-Frame Space, English abbreviation: XIFS) needs to transmit uplink data packets immediately.
  • STA Short Inter-Frame Space
  • X Inter-Frame Space English abbreviation: XIFS
  • the AP can continuously perform downlink and uplink multi-user scheduling transmission.
  • TXOP Transmit Opportunity
  • the AP needs to transmit downlink frames to it and request it from it. Upstream frame.
  • the AP first transmits downlink frames to the downlink. STA. After the STA receives the downlink frame, it needs to transmit the uplink acknowledgement block or the acknowledgement frame immediately. If the AP also wants to request an uplink frame from the STA, it needs to send another trigger frame. After the STA receives the trigger frame again, the uplink frame transmission can be performed.
  • the AP and the STA want to complete a complete downlink and uplink data transmission, the AP needs to send another trigger frame, which increases the overhead of the system.
  • an aggregation of a media access control (MAC) frame that is, an aggregate frame aggregation protocol data module using a MAC protocol data unit (MPDU) (Aggregate-MPDU, English abbreviation: A-MPDU) performs aggregation of different types of frames.
  • MPDU MAC protocol data unit
  • Multiple A-MPDU subframes may be included in one A-MPDU, and MPDUs are carried in each A-MPDU subframe. If the first MPDU is an acknowledgment frame and the second MPDU is a Data frame, different types of MAC frames can be simultaneously transmitted.
  • the aggregation is a MAC layer aggregation
  • different types of MAC frames need to adopt the same physical parameters, such as Modulation and Coding Scheme (MCS) and Number of Spatial and Time Stream (English).
  • MCS Modulation and Coding Scheme
  • NSTS Number of Spatial and Time Stream
  • the system has different requirements for the robustness of the acknowledgment frame and the data frame, and it is often desirable to confirm that the frame can be more robust.
  • MCS Modulation and Coding Scheme
  • NSTS Number of Spatial and Time Stream
  • the system has different requirements for the robustness of the acknowledgment frame and the data frame, and it is often desirable to confirm that the frame can be more robust.
  • the packet error rate Packet Error Rate, English abbreviation: PER
  • PER Packet Error Rate
  • the acknowledgement frame is not robust enough. If the MCS with a low packet error rate is used at the same time, the transmission rate of the data frame will be slow, which will affect the system throughput.
  • the embodiments of the present invention provide a data transmission method and device, which are used to improve data interaction efficiency between an access point AP and a station STA, and reduce system overhead.
  • a first aspect of the embodiments of the present invention provides a data transmission method, including:
  • the station STA receives the data packet sent by the access point AP, where the data packet includes resource scheduling information and a data field, the resource scheduling information includes physical parameters of the space-time stream, and the resource scheduling information further includes first indication information, where The first indication information is used to indicate each orthogonal frequency division multiple access The number of time blocks included in the data field on the OFDMA subband;
  • the first time block and the second time block are both performed by using the same physical parameters of the space-time stream. And transmitting, the first time block and the second time block respectively carry a media access control MAC frame; the STA parses the MAC frame carried by the first time block and the second time block respectively.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols;
  • the method also includes:
  • the STA collects data of the first time block according to the preset number or the indicated number of OFDM symbol lengths
  • the STA collects data of the second time block according to an OFDM symbol length occupied by the second time block.
  • the resource scheduling information further includes: corresponding to the second time block. a physical parameter of the second non-spacetime stream, where the physical parameter of the second non-spacetime stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block;
  • the physical parameter of the first non-space time stream indicates a coded modulation mode of the MAC frame carried by the first time block;
  • Receiving, by the STA, the MAC frame carried by the second time block includes:
  • Receiving, by the STA, the MAC frame carried by the first time block includes:
  • the STA parses the MAC frame carried by the first time block according to the physical parameter of the preset first non-empty time stream.
  • the resource scheduling information further includes a physical parameter and a physical parameter of the second non-empty time stream, the physical parameter of the first non-empty time stream corresponding to the first time block, the physical parameter of the second non-empty time stream and the second time
  • the physical parameters of the first non-empty time stream and the physical parameters of the second non-space time stream are respectively used to indicate coding of a MAC frame carried by the first time block and the second time block Modulation
  • Receiving, by the STA, the MAC frame carried by the first time block includes:
  • the STA parses the MAC frame carried by the first time block according to the physical parameter of the first non-empty time stream;
  • Receiving, by the STA, the MAC frame carried by the second time block includes:
  • the STA parses the MAC frame carried by the second time block according to the physical parameter of the second non-space time stream.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the AP presets to the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • a second aspect of the embodiments of the present invention provides a data transmission method, including:
  • the station STA receives the trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information; the first indication information The information is used to indicate that the STA needs to send the first time block and the second time block to the same orthogonal frequency division multiple access OFDMA subband to the AP;
  • the physical parameters of the space-time flow are transmitted, 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 orthogonal frequency division multiplexing OFDM symbols.
  • the resource scheduling information further includes: corresponding to the second time block. a physical parameter of the second non-spacetime stream, where the physical parameter of the second non-spacetime stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block;
  • the physical parameter of the first non-space time stream indicates a coded modulation mode of the MAC frame carried by the first time block.
  • the resource scheduling information further includes a physical parameter and a physical parameter of the second non-empty time stream, the physical parameter of the first non-empty time stream corresponding to the first time block, the physical parameter of the second non-empty time stream and the second time
  • the physical parameters of the first non-empty time stream and the physical parameters of the second non-space time stream are respectively used to indicate coding of a MAC frame carried by the first time block and the second time block Modulation.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • a third aspect of the embodiments of the present invention provides a data transmission method, including:
  • the station STA receives the trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream;
  • the STA sends a data packet to the AP, where the data packet includes a data field and first indication information, where the first indication information is used to indicate a quantity of time blocks included in the data field;
  • the first time block and the second time block are both transmitted by using the same physical parameters of the space-time stream, the first time The block and the second time block respectively carry a medium access control MAC frame.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the data packet further includes second indication information, where the second The indication information is used to indicate a physical parameter of the non-empty time stream of the first time block and/or the second time block, where the physical parameter of the non-space time stream is used to indicate a coded modulation mode of the corresponding time block.
  • the second indication information indicates a non-empty time flow of the first time block.
  • the second time block adopts a physical parameter of a preset non-empty time stream; and when the second indication information indicates a physical parameter of the non-empty time stream of the second time block, the A time block uses the physical parameters of the preset non-space time stream.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the third indication information.
  • a fourth aspect of the embodiments of the present invention provides a data transmission method, including:
  • the access point AP sets resource scheduling information in a data packet that needs to be sent to the station STA, where the data packet includes a data field, the resource scheduling information includes first indication information, and the first indication information is used to indicate each positive The number of time blocks included in the data field on the frequency division multiple access OFDMA subband;
  • 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 are both performed by using the same physical parameters of the space-time stream. Transmitting, the first time block and the second time block respectively carrying a media access control MAC frame;
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the resource scheduling information further includes: corresponding to the second time block. a physical parameter of the second non-spacetime stream, where the physical parameter of the second non-spacetime stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block, where the first time block adopts a preset
  • the physical parameter of the non-time-time stream indicates the coding and modulation mode of the MAC frame carried by the first time block.
  • the resource scheduling information further includes a physical parameter and a physical parameter of the second non-empty time stream, the physical parameter of the first non-empty time stream corresponding to the first time block, the physical parameter of the second non-empty time stream and the second time
  • the physical parameters of the first non-empty time stream and the physical parameters of the second non-space time stream are respectively used to indicate coding of a MAC frame carried by the first time block and the second time block Modulation.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the AP presets to the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • a fifth aspect of the embodiments of the present invention provides a data transmission method, including:
  • the access point AP sends a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information, where the first indication information is used to indicate the STA Transmitting, by the AP, the first time block and the second time block in the same orthogonal frequency division multiple access OFDMA subband;
  • a data packet sent by the STA where the data packet includes a data field, where the data field includes a first time block and a second time block, where the first time block and the second time block are both used
  • the physical parameters of the same space-time flow are transmitted, where the first time block and the second time block respectively carry a media access control MAC frame; the AP parses the first time block and the first The MAC frame carried by the two time blocks respectively.
  • the first implementation manner of the fifth aspect of the embodiment of the present invention The first time block occupies a preset number or an indicated number of OFDM symbols; the method further includes:
  • the AP collects data of the first time block according to the preset number or the indicated number of orthogonal frequency division multiplexing OFDM symbol lengths;
  • the AP collects data of the second time block according to an OFDM symbol length occupied by the second time block.
  • the resource scheduling information further includes: corresponding to the second time block. a physical parameter of the second non-spacetime stream, where the physical parameter of the second non-spacetime stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block;
  • the physical parameter of the first non-space time stream indicates a coded modulation mode of the MAC frame carried by the first time block;
  • the parsing, by the AP, the MAC frame carried by the second time block includes:
  • the parsing, by the AP, the MAC frame carried by the first time block includes:
  • the AP parses the MAC frame carried by the first time block according to the physical parameter of the preset first non-empty time stream.
  • the resource scheduling information further includes a physical parameter and a physical parameter of the second non-empty time stream, the physical parameter of the first non-empty time stream corresponding to the first time block, the physical parameter of the second non-empty time stream and the second time
  • the physical parameters of the first non-empty time stream and the physical parameters of the second non-space time stream are respectively used to indicate coding of a MAC frame carried by the first time block and the second time block Modulation
  • the parsing, by the AP, the MAC frame carried by the first time block includes:
  • the parsing, by the AP, the MAC frame carried by the second time block includes:
  • the AP parses the MAC frame carried by the second time block according to the physical parameter of the second non-empty time stream.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • a sixth aspect of the embodiments of the present invention provides a data transmission method, including:
  • the access point AP sends a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream;
  • the first time block and the second time block are both transmitted by using the same physical parameters of the space-time stream, the first time The block and the second time block respectively carry a medium access control MAC frame.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the data packet further includes second indication information, the second The indication information is used to indicate a physical parameter of the non-empty time stream of the first time block and/or the second time block, where the physical parameter of the non-space time stream is used to indicate a coded modulation mode of the corresponding time block.
  • the second indication information indicates a non-empty time flow of the first time block.
  • the second time block adopts a physical parameter of a preset non-empty time stream; and when the second indication information indicates a physical parameter of the non-empty time stream of the second time block, the A time block uses the physical parameters of the preset non-space time stream.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the third indication information.
  • a seventh aspect of the embodiments of the present invention provides a station STA, including:
  • a transceiver module configured to receive a data packet sent by the 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 a first indication Information, the first indication information is used to indicate the number of time blocks included in the data field on each orthogonal frequency division multiple access OFDMA subband;
  • the control MAC module is configured to parse the MAC frame carried by the first time block and the second time block respectively.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols;
  • the transceiver module is also used to:
  • the processing module is further configured to: collect 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 the OFDM occupied by the second time block according to the total length of the obtained data field and the preset number of the first time block or the indicated number of OFDM symbol lengths Symbol length
  • the processing module is further configured to: collect data of the second time block according to an OFDM symbol length occupied by the second time block.
  • the resource scheduling information further includes: corresponding to the second time block a physical parameter of the second non-spacetime stream, where the physical parameter of the second non-spacetime stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block;
  • the physical parameter of the first non-space time stream indicates a coded modulation mode of the MAC frame carried by the first time block;
  • the processing module is specifically configured to:
  • the processing module is further specifically configured to:
  • the resource scheduling information further includes a physical parameter and a physical parameter of the second non-empty time stream, the physical parameter of the first non-empty time stream corresponding to the first time block, the physical parameter of the second non-empty time stream and the second time
  • the physical parameters of the first non-empty time stream and the physical parameters of the second non-space time stream are respectively used to indicate coding of a MAC frame carried by the first time block and the second time block Modulation
  • the processing module is specifically configured to:
  • the processing module is further specifically configured to:
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the AP presets to the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • An eighth aspect of the embodiments of the present invention provides a station STA, including:
  • the transceiver module is configured to receive a trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information, where the first indication information is used by Instructing the STA to send the first time block and the second time block to the same orthogonal frequency division multiple access OFDMA subband to the AP;
  • the transceiver module is further configured to send a data packet to the AP, where the data packet includes a data field, where the data field includes a first time block and a second time block, and the first time block and the second time block
  • the time blocks are all transmitted by using the same physical parameters of the space-time stream, where the first time block and the second time block respectively carry a media access control MAC frame;
  • a processing module configured to control the transceiver module to receive a trigger frame sent by the AP, and control the transceiver module to send a data packet to the AP.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the resource scheduling information further includes: corresponding to the second time block. a physical parameter of the second non-spacetime stream, where the physical parameter of the second non-spacetime stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block;
  • the physical parameter of the first non-space time stream indicates a coded modulation mode of the MAC frame carried by the first time block.
  • the resource scheduling information further includes a physical parameter and a physical parameter of the second non-empty time stream, the physical parameter of the first non-empty time stream corresponding to the first time block, the physical parameter of the second non-empty time stream and the second time
  • the physical parameters of the first non-empty time stream and the physical parameters of the second non-space time stream are respectively used to indicate coding of a MAC frame carried by the first time block and the second time block Modulation.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • a ninth aspect of the embodiment of the present invention provides a station STA, including:
  • a transceiver module configured to receive a trigger frame sent by an access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of a space-time stream;
  • the transceiver module is further configured to send a data packet to the AP, where the data packet includes a data field and first indication information, where the first indication information is used to indicate a quantity of time blocks included in the data field;
  • the first time block and the second time block are both transmitted by using the same physical parameters of the space-time stream, the first time The block and the second time block respectively carry a media access control MAC frame;
  • a processing module configured to control the transceiver module to receive a trigger frame sent by the AP, and control the transceiver module to send a data packet to the AP.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the data packet further includes second indication information, the second The indication information is used to indicate a physical parameter of the non-empty time stream of the first time block and/or the second time block, where the physical parameter of the non-space time stream is used to indicate a coded modulation mode of the corresponding time block.
  • the second indication information indicates a non-empty time flow of the first time block.
  • the second time block adopts a physical parameter of a preset non-empty time stream; and when the second indication information indicates a physical parameter of the non-empty time stream of the second time block, the A time block uses the physical parameters of the preset non-space time stream.
  • the occupying the preset number of OFDM symbols by the first time block includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the third indication information.
  • a tenth aspect of the embodiment of the present invention provides an access point AP, including:
  • a processing module configured to set resource scheduling information in a data packet that needs to be sent to the station STA, where the data packet includes a data field, where the resource scheduling information includes first indication information, where the first indication information is used to indicate each The number of time blocks included in the data field on the orthogonal frequency division multiple access OFDMA subband;
  • 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 are both performed by using the same physical parameters of the space-time stream. Transmitting, the first time block and the second time block respectively carrying a media access control MAC frame;
  • 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 according to physical parameters of the space-time stream according to physical parameters of the space-time stream A block and the second time block.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the resource scheduling information further includes: corresponding to the second time block. a physical parameter of the second non-spacetime stream, where the physical parameter of the second non-spacetime stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block, where the first time block adopts a preset Non
  • the physical parameter of the space-time stream indicates the coded modulation mode of the MAC frame carried by the first time block.
  • the resource scheduling information further includes a physical parameter and a physical parameter of the second non-empty time stream, the physical parameter of the first non-empty time stream corresponding to the first time block, the physical parameter of the second non-empty time stream and the second time
  • the physical parameters of the first non-empty time stream and the physical parameters of the second non-space time stream are respectively used to indicate coding of a MAC frame carried by the first time block and the second time block Modulation.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the AP presets to the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • An eleventh embodiment of the present invention provides an access point AP, including:
  • a transceiver module configured to send a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information, where the first indication information is used to indicate the The STA needs to send the first time block and the second time block to the AP in the same orthogonal frequency division multiple access OFDMA subband;
  • the transceiver module is further configured to receive a data packet sent by the STA, where the data packet includes a data field, where the data field includes a first time block and a second time block, and the first time block and the first time block The two time blocks are all transmitted by using the same physical parameters of the space-time stream, the first time The block and the second time block respectively carry a media access control MAC frame;
  • the processing module is configured to parse the MAC frame carried by the first time block and the second time block respectively.
  • the first time block occupies a preset number or an indicated number of OFDM symbols; to:
  • the processing module is further configured to calculate, according to the total length of the obtained data field and the preset number of the first time block or the indicated number of OFDM symbol lengths, the second time block is occupied. OFDM symbol length;
  • the processing module is further configured to: collect data of the second time block according to an OFDM symbol length occupied by the second time block.
  • the resource scheduling information further includes the second a physical parameter of the second non-empty time stream corresponding to the time block, where the physical parameter of the second non-space time stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block; the first time block Determining, by using a preset physical parameter of the first non-space time stream, a coding and modulation mode of the MAC frame carried by the first time block;
  • the processing module is specifically configured to:
  • the processing module is further specifically configured to:
  • the resource scheduling information further includes the first non-empty a physical parameter of the current flow and a physical parameter of the second non-empty flow, the physical parameter of the first non-empty flow corresponding to the first time block, the physical parameter of the second non-empty flow and the The second time block corresponds,
  • the physical parameters of the first non-empty time stream and the physical parameters of the second non-space time stream are respectively used to indicate a coded modulation mode of the MAC frame carried by the first time block and the second time block;
  • the processing module is specifically configured to:
  • the processing module is further specifically configured to:
  • the occupying, by the first time block, the preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • a twelfth aspect of the embodiments of the present invention provides an access point AP, including:
  • a transceiver module configured to send a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of a space-time stream;
  • 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, where the first indication information is used to indicate a quantity of time blocks included in the data field;
  • the first time block and the The second time block is transmitted by using the same physical parameter of the space-time stream, where the first time block and the second time block respectively carry a media access control MAC frame;
  • a processing module configured to control the transceiver module to send a trigger frame to the STA, and control the transceiver module to receive the data packet sent by the STA.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the data packet further includes second indication information, where The second indication information is used to indicate a physical parameter of the non-empty time stream of the first time block and/or the second time block, where the physical parameter of the non-empty time stream is used to indicate the corresponding time block.
  • the second indication information is used to indicate a physical parameter of the non-empty time stream of the first time block and/or the second time block, where the physical parameter of the non-empty time stream is used to indicate the corresponding time block.
  • the second indication information indicates that the first time block is non-empty
  • the second time block adopts a physical parameter of a preset non-empty time flow
  • the second indication information indicates a physical parameter of the non-empty time flow of the second time block
  • the first time block uses the physical parameters of the preset non-space time stream.
  • the occupying, by the first time block, the preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the third indication information.
  • the data packet sent by the AP to the STA includes resource scheduling information and a data field, where the resource scheduling information includes first indication information, and the first indication information indicates the data field.
  • the first time block and the second time block are respectively carried, and the first time block and the second time block respectively carry MAC frames, and are all transmitted by physical parameters of the same space-time flow, and the STA parses the first time block. a MAC frame carried by the second time block, respectively. In this way, different MAC frames are transmitted in the same sub-band, which improves the data interaction efficiency between the AP and the STA, and reduces the overhead of the system.
  • 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 schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of another embodiment of a method for data transmission according to an embodiment of the present invention.
  • FIG. 12 is a schematic 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 an embodiment of 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 according to an embodiment of the present invention.
  • FIG. 17 is a schematic diagram of another embodiment of an access point AP according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of another embodiment of an access point AP according to an embodiment of the present invention.
  • FIG. 19 is a schematic diagram of another embodiment of a station STA according to an embodiment of the present invention.
  • FIG. 20 is a schematic diagram of another embodiment of an access point AP according to an embodiment of the present invention.
  • the embodiment of the invention combines the characteristics of the acknowledgement frame to design a data packet with a relatively simplified resource scheduling indication.
  • Control frames such as Acknowledgement (ACK) frame and Block ACK (BA) frame have the following characteristics:
  • a relatively robust transmission mode is required. Generally, it needs to work under the MCS with a low packet error rate. Since the frame length of the frame is small, the number of symbols required for transmission is not large.
  • the resource block size occupied by the space stream may be relatively fixed, and no additional resources may be required to indicate the number of symbols occupied by the number of symbols.
  • the embodiment of the present invention designs the data packet structure by first dividing the data portion into a first time block and a second time block, and each time block does not require a separate efficient short training sequence (High Efficient- Short Training Field (English: abbreviation: HE-STF) and High Efficient-Long Training Field (HE-LTF), but share HE-STF and HE-LTF.
  • HE-STF High Efficient- Short Training Field
  • HE-LTF High Efficient-Long Training Field
  • the first time block and the second time block need to adopt the same NSTS, Beamforming (BF), and Space-Time Block Coding (Space-Time Block Coding, English abbreviation: STBC) physical parameters of the space-time flow, otherwise a HE-STF and a HE-LTF cannot accurately complete the automatic gain control of the first time block and the second time block (Automatic Gain Control, English abbreviation: AGC) With channel estimation.
  • BS Beamforming
  • STBC Space-Time Block Coding
  • the embodiment of the invention discloses a method and a device for data transmission.
  • An embodiment of the data transmission method provided by the present invention is described in detail below with reference to FIG. 2 .
  • the data transmission method includes:
  • the station STA receives a data packet sent by the access point AP, where the data packet includes resource scheduling information and a data field, where the resource scheduling information includes physical parameters of a space-time stream, where the resource
  • the scheduling information further includes first indication information, where the first indication information is used to indicate a quantity of time blocks included in the data field on each orthogonal frequency division multiple access OFDMA subband;
  • the STA and the AP perform data exchange by transmitting data packets to each other.
  • the data packet sent by the AP to the STA the data packet needs to include a data field for transmitting data information, and needs to be included for indicating the location.
  • the resource scheduling information of the data field The physical parameters of the space-time stream included in the resource scheduling information include parameters such as space-time stream number NSTS, beamforming BF, and space-time block code STBC, and are used to indicate a transmission form of the data field, so that The STA can receive the data field according to physical parameters of the space-time stream;
  • the data field is composed of a time block.
  • the data field may be composed of multiple time blocks. Therefore, the resource scheduling information needs to include first indication information, where the first indication information is used. Determining, by the number of time blocks included in the data field on each orthogonal frequency division multiple access OFDMA subband, to enable the STA to receive different time blocks on the data field according to the first indication information .
  • 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 adopt the same physicality of the space-time stream.
  • the parameter is transmitted, where the first time block and the second time block respectively carry a media access control MAC frame, and the STA parses the MAC frame carried by the first time block and the second time block respectively;
  • the first time block and the second time block When the first time block and the second time block are included in the data field, the first time block and the second time block must be transmitted by using physical parameters of the same space-time stream, so that the first time can be The block and the second time block accurately complete the automatic gain control AGC and channel estimation.
  • the first time block and the second time block respectively carry a MAC frame, and the MAC frame may be a different type of frame, such as an acknowledgement frame or a data frame. Since the types of the MAC frames carried by the first time block and the second time block may be different, the content and role of the MAC frame are also different. For example, if the MAC frame is an acknowledgment frame, it is used to indicate that the AP has successfully received the data sent by the STA. The STA needs to parse the MAC frame carried by the first time block and the second time block respectively, because the STA and the AP are to continue to perform high-level data interaction.
  • the data packet sent by the AP to the STA includes resource scheduling information and a data field, where the resource scheduling information includes first indication information, where the first indication information indicates that the data field includes a first time block and a first time block.
  • Two time blocks, the first time block and the second time block respectively carrying a MAC The frame is transmitted by using the physical parameters of the same space-time stream, and the STA parses the MAC frame carried by the first time block and the second time block respectively. In this way, different MAC frames are transmitted in the same sub-band, which improves the data interaction efficiency between the AP and the STA, and reduces the overhead of the system.
  • the resource scheduling information may further include physical parameters of the non-empty time stream to perform MAC frame included in the time block.
  • An indication, wherein the OFDM symbol length occupied by the first time block may also notify the STA by using a preset or an indication, which is specifically described below.
  • FIG. 2 another implementation of the data transmission method in the embodiment of the present invention is shown. Examples include:
  • the station STA receives the data packet sent by the access point AP, where the data packet includes resource scheduling information and a data field, where the resource scheduling information includes physical parameters of the space-time stream, and the resource scheduling information further includes the first indication information.
  • the first indication information is used to indicate the number of time blocks included in the data field on each orthogonal frequency division multiple access OFDMA subband;
  • the first time block and the second time block both adopt the same physicality of the space-time stream.
  • the parameter is transmitted, where the first time block and the second time block respectively carry a media access control MAC frame, where the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM a symbol, the STA receives the first time block and the second time block according to 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. Since the STA collects data of the time block, it needs to perform charging according to the length of the time block. In the prior art, since only one time block is included in the data field, the STA can obtain the length of the time block by acquiring the total length of the data field; and the data field in the embodiment of the present invention may include more than one data block. Therefore, it is necessary to set a preset value or a separate indication for the length of the first time block, so that the STA can collect data of the first time block according to a preset number or an indication number.
  • the first time block occupies a preset number of OFDM symbols, where the first time block occupies a fixed OFDM symbol that the AP pre-sets the first time block by default. Number of numbers. That is, before the AP performs data interaction with the STA, the AP performs protocol agreement with the STA or presets in advance, and both parties can know the OFDM length of the first time block in advance.
  • the first time block occupies a preset number of OFDM symbols, where the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size of the data field.
  • the number of OFDM symbols occupied by the first time block by time may correspond to the size of the subband in the frequency domain. For example, when the size of the subband in the frequency domain is large, such as when a resource block occupies 20 MHz, the corresponding number of symbols in the time domain is small, such as 1 OFDM symbol; when the size of the subband in the frequency domain is smaller Hours, if a resource block occupies only 26 subcarriers, the corresponding number of symbols in the time domain is larger, such as 9 OFDM symbols.
  • the subband size has an accurate mapping relationship with the number of OFDM symbols occupied by the first time block. Therefore, when the STA reads the size of the subband in the frequency domain of the resource block, the OFDM occupied by the first time block can be derived. The number of symbols.
  • 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 second indication information may be a field Seg (1) Alloc (Segment (1) Allocation, allocation of (time) block 1), and the second indication information may explicitly indicate the first time
  • the length of the OFDM symbol occupied by the block; the second indication information may also correspond to the subband size in the frequency domain. For example, if the second indication information field uses 2 bits to indicate the number of OFDM symbols, when the subband size is larger, such as 20 MHz, 00 represents 1 symbol, 01 represents 2 symbols; if the subband size Smaller, such as 26 subcarriers, then 00 represents 4 symbols and 01 represents 8 symbols.
  • the function of indicating whether the data field is a multi-segment Multi Seg may be implemented by whether the value of the Seg(1)Alloc is 0, that is, Seg(1)Alloc is 0, indicating that the number of OFDM symbols occupied by the first time block is 0. That is, if the first time block does not exist, it means that there is only one second time block in the sub-band.
  • 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 preset numbers or indicated numbers. The length enables the STA to accurately collect data within the first time block.
  • the STA collects data of the first time block according to the preset number or the indicated number of OFDM symbol lengths.
  • the STA After receiving the data packet, the STA can receive the data of the first time block according to a preset number or an indicated number of OFDM symbol lengths.
  • the STA calculates, according to the total length of the obtained data field, the preset number of the first time block, or the indicated number of OFDM symbol lengths, the OFDM symbol length occupied by the second time block.
  • the STA can determine the length of the first time block, and then subtract the first time according to the total length of the acquired data field.
  • the length of the block gives the OFDM symbol length of the second time fast.
  • the OFDM symbol length occupied by the second time block may also be indicated by one of the resource scheduling information sent by the AP.
  • the STA collects data of the second time block according to an OFDM symbol length occupied by the second time block.
  • the STA After obtaining the length of the second time block, the STA can collect data of the second time block according to the length of the second time block.
  • the resource scheduling information further includes a physical parameter of the second non-empty time stream corresponding to the second time block, where the physical parameter of the second non-empty time stream is used to indicate that the second time block carries a coded modulation mode of the MAC frame; the first time block uses a preset physical parameter of the first non-space time stream to indicate a coded modulation mode of the MAC frame carried by the first time block; The physical parameter of the second non-time-time stream parses the MAC frame carried by the second time block;
  • the resource scheduling information may further include a physical parameter of the second non-empty time stream corresponding to the second time block, where the second non-empty time stream
  • the physical parameter is used to indicate the coding and modulation mode of the MAC frame carried by the second time block
  • the physical parameters of the non-empty time stream may include a Modulation and Coding Scheme (MCS) and a low-density parity check. Low Density Parity Code (LDPC).
  • MCS Modulation and Coding Scheme
  • LDPC Low Density Parity Code
  • a preset MCS and LPDC may be used for the physical parameters of the non-empty time stream carried by the first block.
  • MCS0 can always be adopted;
  • BCC Binary Convolution Code
  • the MAC frame carried by the first time block may also be explicitly indicated by physical parameters of the first non-empty time stream. That is, the resource scheduling information further includes a physical parameter of the first non-empty time stream and a physical parameter of the second non-empty time stream, where the physical parameter of the first non-empty time stream corresponds to the first time block.
  • the physical parameter of the first non-empty time stream explicitly indicates the MCS or the LDPC of the MAC frame carried by the first time block.
  • the physical parameter of the first non-empty time stream may also indicate only the A modulation coding parameter of a MAC frame carried by a time block, such as only indicating MCS, and LDPC adopting default parameters.
  • the STA parses, according to the physical parameter of the preset first non-empty time stream, the MAC frame carried by the first time block.
  • the STA may be configured according to the physical parameter of the first non-empty time stream. Parsing the MAC frame carried by the first time block.
  • the length of the OFDM symbol occupied by the first time block may be a preset length, so that the resource scheduling information sent by the AP may not need to indicate the length of the OFDM symbol occupied by the first time block, thereby saving
  • 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-empty-time stream, so that the resource scheduling information sent by the AP may not be used to indicate the physicality of the non-empty-time stream of the MAC frame carried by the first time block.
  • the parameters also save the overhead of the system.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the station STA receives a trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information, where the first indication information is used to indicate
  • the STA needs to be in the same orthogonal frequency division multiple access OFDMA subband to the AP Sending the first time block and the second time block;
  • an AP sends a data packet to a STA to implement downlink transmission of transmitting multiple MAC frames in the same subband.
  • the AP needs to send a trigger frame to the STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream that the STA needs to use when performing uplink transmission.
  • the resource scheduling information further includes first indication information, and the first indication information needs to indicate that the STA needs to send the first time block and the second time block to the AP on the same OFDMA subband.
  • the protocol stipulates that the STA needs to send the first time block when performing uplink transmission.
  • the same physical parameters of the space-time stream are used with the second time block.
  • the STA sends a data packet to the AP, where the data packet includes a data field, where the data field includes a first time block and a second time block, where the first time block and the second time block are both And transmitting, by using the same physical parameter of the space-time stream, where the first time block and the second time block respectively carry a media access control MAC frame;
  • the content is similar to the content of the AP sending the data packet to the STA described in S102, and is not described here.
  • the AP sends a trigger frame to the STA, where the trigger frame includes a physical parameter of the space-time stream, and the trigger frame further includes first indication information, where the first indication information indicates that the STA needs to
  • the AP sends the first time block and the second time block, so that the STA uses the same physical parameters of the space-time stream to the first time block and the second in the process of sending the data packet to the AP.
  • the time block is transmitted, and the first time block and the second time block respectively carry a MAC frame, which implements uplink transmission of multiple MAC frames in the same sub-band, thereby improving data interaction efficiency between the AP and the STA, and reducing The overhead of the system.
  • the data packet sent by the STA to the AP includes a first time block and a second time block, where the first time block and the second time block respectively carry a MAC frame.
  • the AP The OFDM symbol length occupied by the first time block may also be notified to the STA, so that the AP can receive the MAC frame carried by the first time block and the second time block.
  • the AP also needs to parse the received MAC frame. Therefore, 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 the non-empty time stream, and is used for Instructing the STA to transmit the coding and modulation modes used by the first time block and the second time block.
  • FIG. 4 another embodiment of the data transmission method in the embodiment of the present invention includes:
  • the station STA receives the trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information, where the first indication information is used to indicate
  • the STA needs to send, to the AP, a first time block and a second time block in the same orthogonal frequency division multiple access OFDMA subband; the resource scheduling information further includes a second non-empty corresponding to the second time block.
  • the physical parameter of the second non-space time stream is used to indicate a coded modulation mode of the MAC frame carried by the second time block; and the first time block adopts a preset first non-empty
  • the physical parameter of the current flow indicates a coding and modulation mode of the MAC frame carried by the first time block;
  • the resource scheduling information further includes physical parameters of the first non-empty time stream and physical parameters of the second non-empty time stream, physical parameters of the first non-empty time stream and the first time block
  • the physical parameter of the first non-empty time stream is used to indicate a coded modulation mode of the MAC frame carried by the first time block.
  • the content of the first time block and the second time block are similar to those of the STA described in S206 according to the physical parameters of the non-empty time stream, and are not described herein.
  • the STA sends a data packet to the AP, where the data packet includes a data field, where the data field includes a first time block and a second time block, where the first time block and the second time block are both And transmitting, by using the same physical parameter of the space-time stream, the first time block and the second time block respectively carrying a media access control MAC frame, where the first time block occupies a preset number or Indicating a number of orthogonal frequency division multiplexing OFDM symbols;
  • the first time block occupies a preset number of OFDM symbols, where the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default.
  • the first time block occupies a preset number of OFDM symbols, where the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size of the data field.
  • 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, which may be: the first time block occupies The number of OFDM symbols of the length indicated by the second indication information.
  • the length of the OFDM symbol occupied by the first time block may be a preset length, so that the resource scheduling information sent by the AP may not need to indicate the length of the OFDM symbol occupied by the first time block, thereby saving
  • 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-empty-time stream, so that the resource scheduling information sent by the AP may not be used to indicate the physicality of the non-empty-time stream of the MAC frame carried by the first time block.
  • the parameters also save the overhead of the system.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the station STA receives the trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream.
  • the STA When the STA needs to perform the uplink data transmission, the STA first needs to obtain the physical parameter of the space-time stream used by the uplink data field, so the AP needs to send the trigger frame to the STA first, and the trigger frame includes The physical parameters of the space time stream.
  • the STA sends a data packet to the AP, where the data packet includes a data field and first indication information, where the first indication information is used to indicate a quantity of time blocks included in the data field; when the data is When the field includes the first time block and the second time block, the first time block and the second time block are both transmitted using the same physical parameters of the space-time stream, the first time block and the first time block
  • the second time block carries a media access control MAC frame respectively;
  • the STA may autonomously determine the number of time blocks included in the data field to be transmitted.
  • the STA determines the number of time blocks included in the data field that needs to be sent, the number of time blocks included in the data field sent by the STA to the AP is indicated by sending the first indication information.
  • the same space-time stream parameter is used for transmitting and receiving in the same sub-band with more than one time block, thereby realizing the time-reuse transmission mode under the condition of complicated implementation and low overhead, and improving the system. Transmission efficiency and throughput. And combined with the second-order indication, realized by The STA determines the number of time blocks and the physical parameters of the non-empty time stream of each time block, so as to avoid waste of resources because the AP does not know the cache of the STA and the channel condition.
  • the second indication information indicates physical parameters of the non-empty time stream of the first time block and/or the second time block.
  • the second indication information when the second indication information only indicates the logistics parameter of the non-empty time stream of one time block, the physical parameter of the non-empty time stream of the other time block adopts a preset non-empty time flow. Physical parameters are described in detail below.
  • the station STA receives the trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream.
  • the STA sends a data packet to the AP, where the data packet includes a data field and first indication information, where the first indication information is used to indicate a quantity of time blocks included in the data field; when the data is When the field includes the first time block and the second time block, the first time block and the second time block are both transmitted using the same physical parameters of the space-time stream, the first time block and the first time block
  • the second time block carries a media access control MAC frame, where the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols;
  • the first time block occupies a preset number of OFDM symbols, where the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default.
  • the first time block occupies a preset number of OFDM symbols, where the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size of the data field.
  • 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, and the first time block occupies the number of OFDM symbols of the length indicated by the third indication information.
  • the content is similar to the content of the OFDM symbol data of the length indicated by the second indication information in the first time block described in S402, and is not described herein.
  • the data packet further includes second indication information, where the second indication information is used to indicate physical parameters of the non-empty time stream of the first time block and/or the second time block, Non-empty time flow
  • the physical parameter is used to indicate a coded modulation mode of the corresponding time block; when the second indication information indicates a physical parameter of the non-empty time stream of the first time block, the second time block adopts a preset a physical parameter of the non-empty time stream; when the second indication information indicates a physical parameter of the non-empty time stream of the second time block, the first time block adopts a preset physical parameter of the non-empty time stream ;
  • the STA can autonomously determine the physical parameters of the non-empty time stream and carry it through one or more High Efficient-Signal Field-C (English: abbreviation: HE-SIG-C).
  • the AP indicates the location of the resource in the frequency domain of each STA by using a trigger frame, such as the location and size of the subband on the frequency domain, and indicates the spatial stream. Then, the STA can know the frequency domain and spatial position occupied by the transmission data when transmitting in the uplink.
  • the non-time-time flow logistics parameters such as MCS, LDPC and other parameters, it can be carried by one or more HE-SIG-C.
  • the transmission of several time blocks can also be indicated by HE-SIG-C/C1, so that the number of transmission time blocks can be determined autonomously.
  • the STA completes the indication of a part of the resource scheduling information by using the high-efficiency signaling field HE-SIG-B field or the trigger frame trigger frame, and completes the non-empty time of the LDPC, the MCS, etc. through one or more HE-SIG-Cs.
  • An indication of the physical parameters of the flow therefore, the inventive scheme is referred to as a second order indication of the molecular band. In this way, it can be determined by the STA whether the uplink performs transmission of multiple MAC frames.
  • the HE-SIG-B/trigger frame trigger frame carries resource scheduling information related to frequency domain location and space-time flow, while HE-SIG-C carries parameter information unrelated to space-time flow.
  • the indication of multiple time blocks may exist in the HE-SIG-B/trigger frame or may be carried in one or more HE-SIG-Cs.
  • the field Seg(1)Alloc may also be selectively present in the data packet and may be used indirectly to indicate whether more than one time block exists. If only one HE-SIG-C exists, parameters such as MCS and LDPC of the two time blocks are simultaneously indicated.
  • first time block is not limited to being one time block
  • first time block may be multiple
  • second time block is not limited to being one time block
  • second time block is also There may be multiple
  • the second indication indication information is not limited to one piece of indication information
  • the second indication information may be indication information corresponding to the first time block and/or the second time block.
  • the physical parameters of the non-empty time stream on a certain time block may adopt a preset default value; if there are multiple HE-SIG-Cs, each time is indicated by HE-SIG-C before each time block respectively.
  • the physical parameters of the non-empty-time stream such as MCS and LDPC of the block, in addition, HE-SIG-C can also be used to carry the physical parameters.
  • the specific content is similar to the content of the physical parameters of the non-empty-time stream such as the preset MCS and LDPC in the first time block described in S206, and is not described here.
  • the length of the OFDM symbol occupied by the first time block may be a preset length, so that the resource scheduling information sent by the AP may not need to indicate the length of the OFDM symbol occupied by the first time block, thereby saving
  • 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-empty time stream, so that the resource scheduling information sent by the AP may not be carried in the first time block or the second time block.
  • the physical parameters of the non-empty-time stream of the MAC frame also save the overhead of the system.
  • another embodiment of the data transmission method in the embodiment of the present invention includes:
  • the access point AP sets resource scheduling information in a data packet that needs to be sent to the station STA, where the data packet includes a data field, where the resource scheduling information includes first indication information, where the first indication information is used to indicate each The number of time blocks included in the data field on the orthogonal frequency division multiple access OFDMA subband;
  • 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 adopt the same physicality of the space-time stream.
  • the parameter is transmitted, where the first time block and the second time block respectively carry a media access control MAC frame;
  • the AP sends the data packet and the resource scheduling information to the STA, so that the Receiving, by the physical parameter of the space-time stream, the first time block and the second time block according to physical parameters of the space-time stream;
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the access point AP sets resource scheduling information in a data packet that needs to be sent to the station STA, where the data packet includes a data field, where the resource scheduling information includes first indication information, where the first indication information is used to indicate that each The number of time blocks included in the data field on the orthogonal frequency division multiple access OFDMA subband;
  • the first indication information indicates that the data field includes a first time block and a second time
  • the first time block and the second time block are both transmitted by using the same physical parameter of the space-time stream, where the first time block and the second time block respectively carry media access Controlling a MAC frame
  • the AP transmitting the data packet and the resource scheduling information to the STA, so that the STA receives the first parameter according to physical parameters of the space-time stream according to physical parameters of the space-time stream a time block and the second time block
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols
  • the occupying the preset number of OFDM symbols by the first time block includes:
  • the first time block occupies a fixed number of OFDM symbols that the AP presets to the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • the resource scheduling information further includes a physical parameter of the second non-empty time stream corresponding to the second time block, where the physical parameter of the second non-empty time stream is used to indicate the second time block
  • the coded modulation mode of the carried MAC frame wherein the first time block uses a preset physical parameter of the non-space time stream to indicate a coded modulation mode of the MAC frame carried by the first time block.
  • the resource scheduling information further includes physical parameters of the first non-empty time stream and physical parameters of the second non-empty time stream, physical parameters of the first non-empty time stream and the first time block
  • the physical parameter of the second non-empty time stream is corresponding to the second time block
  • the physical parameter of the first non-empty time stream and the physical parameter of the second non-empty time stream are respectively used to indicate And a coding and modulation manner of the MAC frame carried by the first time block and the second time block.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the access point AP sends a trigger frame to the station STA, where the trigger frame includes resource scheduling information.
  • the resource scheduling information includes a physical parameter of the space-time stream and first indication information, where the first indication information is used to indicate that the STA needs to send the first time to the AP in the same orthogonal frequency division multiple access OFDMA subband. Block and second time block;
  • the AP receives a data packet sent by the STA, where the data packet includes a data field, where the data field includes a first time block and a second time block, the first time block and the second time block.
  • the first time block and the second time block respectively carry a media access control MAC frame; the AP parses the first time block and the Decoding a MAC frame carried by the second time block respectively;
  • the content is similar to the content of the MAC frame carried by the STA in the first time block and the second time block, and is not described here.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the access point AP sends a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information, where the first indication information is used to indicate
  • the STA needs to send the first time block and the second time block to the AP in the same orthogonal frequency division multiple access OFDMA subband;
  • the AP receives a data packet sent by the STA, where the data packet includes a data field, where the data field includes a first time block and a second time block, and the first time block and the second time block
  • 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 indication. a number of OFDM symbols
  • the AP receiving the first time block and the second time block according to the physical parameter according to the space-time stream;
  • the content is similar to the content of the first time block and the second time block according to the physical parameters of the space-time stream, and is not described herein.
  • the AP collects data of the first time block according to the preset number or the indicated number of OFDM symbol lengths.
  • the details are similar to the data content of the first time block received by the STA described in S203 according to the preset number or the indicated number of OFDM symbol lengths, and details are not described herein.
  • the AP calculates, according to the total length of the obtained data field and the preset number of the first time block or the indicated number of OFDM symbol lengths, the OFDM symbol length occupied by the second time block.
  • the content is calculated by using the second time block according to the total length of the obtained data field and the preset number of the first time block or the indicated number of OFDM symbol lengths.
  • the OFDM symbol length is similar in content and will not be described here.
  • the AP collects data of the second time block according to an OFDM symbol length occupied by the second time block.
  • the content is similar to the content of the data of the second time block that is received by the STA according to the OFDM symbol length occupied by the second time block, and is not described here.
  • the resource scheduling information further includes a physical parameter of the second non-empty time stream corresponding to the second time block, where the physical parameter of the second non-empty time stream is used to indicate that the second time block is carried. a coded modulation mode of the MAC frame; the first time block uses a preset physical parameter of the first non-space time stream to indicate a coded modulation mode of the MAC frame carried by the first time block; The physical parameter of the second non-time-time stream parses the MAC frame carried by the second time block;
  • the content is similar to the content of the MAC frame carried by the STA in the second time block according to the physical parameter of the second non-empty time stream, and is not described here.
  • the AP parses the MAC frame carried by the first time block according to the physical parameter of the preset first non-empty time stream;
  • the content is similar to the content of the MAC frame carried by the first time block according to the physical parameter of the preset first non-empty time stream, and is not described herein.
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the access point AP sends a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream;
  • the AP receives a data packet sent by the STA, where the data packet includes a data field and first indication information, where the first indication information is used to indicate a quantity of time blocks included in the data field;
  • the data field includes the first time block and the second time block
  • the first time block and the second time block are both transmitted by using the same physical parameters of the space-time stream, where the first time
  • the inter-block and the second time block respectively carry a media access control MAC frame;
  • another embodiment of a method for data transmission in an embodiment of the present invention includes:
  • the access point AP sends a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream;
  • the AP receives a data packet sent by the STA, where the data packet includes a data field and first indication information, where the first indication information is used to indicate a quantity of time blocks included in the data field;
  • the data field includes the first time block and the second time block
  • the first time block and the second time block are both transmitted by using the same physical parameters of the space-time stream, the first time block and the The second time block carries a media access control MAC frame, where the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols;
  • an embodiment of a station STA in the embodiment of the present invention includes:
  • the transceiver module 1301 is configured to receive a data packet sent by the 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 the space-time stream, and the resource scheduling information further includes the first Instructing information, the first indication information is used to indicate a quantity of time blocks included in the data field on each orthogonal frequency division multiple access OFDMA subband;
  • the processing module 1302 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 adopt the same space time flow
  • the physical parameter is transmitted, and the first time block and the second time block respectively carry a media access control MAC frame;
  • the processing module 1302 is configured to parse the first time block and the second time block The MAC frames carried respectively;
  • 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:
  • the processing module 1302 is further configured to: collect data of the first time block according to the preset number or the indicated number of OFDM symbol lengths;
  • the processing module 1302 is further configured to: calculate, according to the total length of the obtained data field and the preset number or the indicated number of OFDM symbol lengths occupied by the first time block, the occupied by the second time block OFDM symbol length;
  • the processing module 1302 is further configured to: collect data of the second time block according to an OFDM symbol length occupied by the second time block;
  • the resource scheduling information further includes a physical parameter of the second non-empty time stream corresponding to the second time block, where the physical parameter of the second non-empty time stream is used to indicate the second time block a coded modulation mode of the carried MAC frame; the first time block uses a preset physical parameter of the first non-space time stream to indicate a coded modulation mode of the MAC frame carried by the first time block;
  • the processing module 1302 is specifically configured to:
  • the processing module 1302 is further specifically configured to:
  • the resource scheduling information further includes physical parameters of the first non-empty time stream and physical parameters of the second non-empty time stream, physical parameters of the first non-empty time stream and the first time block
  • the physical parameter of the second non-empty time stream is corresponding to the second time block
  • the physical parameter of the first non-empty time stream and the physical parameter of the second non-empty time stream are respectively used to indicate a coding and modulation manner of the MAC frame 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:
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the AP presets to the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • another embodiment of a station STA in the embodiment of the present invention includes:
  • the transceiver module 1401 is configured to receive a trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information, where the first indication information is used by Instructing the STA to send the first time block and the second time block to the same orthogonal frequency division multiple access OFDMA subband to the AP;
  • the transceiver module 1401 is further configured to send a data packet to the AP, where the data packet includes a data field, where the data field includes a first time block and a second time block, and the first time block and the first time block The second time block is transmitted by using the same physical parameter of the space-time stream, where the first time block and the second time block respectively carry a media access control MAC frame;
  • the processing module 1402 is configured to control the transceiver module 1401 to receive a trigger frame sent by the AP, and control the transceiver module 1401 to send a data packet to the AP.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the resource scheduling information further includes a physical parameter of the second non-empty time stream corresponding to the second time block, where the physical parameter of the second non-empty time stream is used to indicate the second time block a coded modulation mode of the carried MAC frame; the first time block uses a preset physical parameter of the first non-space time stream to indicate a coded modulation mode of the MAC frame carried by the first time block.
  • the resource scheduling information further includes physical parameters of the first non-empty time stream and physical parameters of the second non-empty time stream, physical parameters of the first non-empty time stream and the first time block
  • the physical parameter of the second non-empty time stream is corresponding to the second time block
  • the physical parameter of the first non-empty time stream and the physical parameter of the second non-empty time stream are respectively used to indicate And a coding and modulation manner of the MAC frame carried by the first time block and the second time block.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • another embodiment of a station STA in the embodiment of the present invention includes:
  • the transceiver module 1501 is configured to receive a trigger frame sent by the access point AP, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream;
  • the transceiver module 1501 is further configured to send a data packet to the AP, where the data packet includes a data field and first indication information, where the first indication information is used to indicate that the data field is included The number of time blocks;
  • the first time block and the second time block are both transmitted by using the same physical parameters of the space-time stream, the first time The block and the second time block respectively carry a media access control MAC frame;
  • the processing module 1502 is configured to control the transceiver module to receive a trigger frame sent by the AP, and control the transceiver module to send a data packet to the AP.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the data packet further includes second indication information, where the second indication information is used to indicate physical parameters of the non-empty time stream of the first time block and/or the second time block, The physical parameters of the non-empty time stream are used to indicate the coded modulation mode of the corresponding time block.
  • the second time block adopts a physical parameter of a preset non-empty time stream;
  • the first time block adopts a preset physical parameter of the non-empty time stream.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the third indication information.
  • an embodiment of an access point AP in an embodiment of the present invention includes:
  • the processing module 1602 is configured to set resource scheduling in a data packet that needs to be sent to the station STA.
  • Information the data packet includes a data field
  • the resource scheduling information includes first indication information, where the first indication information is used to indicate a time included in the data field on each orthogonal frequency division multiple access OFDMA subband The number of blocks;
  • 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 are both performed by using the same physical parameters of the space-time stream. Transmitting, the first time block and the second time block respectively carrying a media access control MAC frame;
  • the transceiver module 1601 is configured to send the data packet and the resource scheduling information to the STA, so that the STA receives the first according to physical parameters of the space-time stream according to physical parameters of the space-time stream. a time block and the second time block;
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the resource scheduling information further includes a physical parameter of the second non-empty time stream corresponding to the second time block, where the physical parameter of the second non-empty time stream is used to indicate the second time block
  • the coded modulation mode of the carried MAC frame wherein the first time block uses a preset physical parameter of the non-space time stream to indicate a coded modulation mode of the MAC frame carried by the first time block.
  • the resource scheduling information further includes physical parameters of the first non-empty time stream and physical parameters of the second non-empty time stream, physical parameters of the first non-empty time stream and the first time block
  • the physical parameter of the second non-empty time stream is corresponding to the second time block
  • the physical parameter of the first non-empty time stream and the physical parameter of the second non-empty time stream are respectively used to indicate And a coding and modulation manner of the MAC frame carried by the first time block and the second time block.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the AP presets to the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • another embodiment of an access point AP in the embodiment of the present invention includes:
  • the transceiver module 1701 is configured to send a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream and first indication information, where the first indication information is used to indicate
  • the STA needs to send the first time block and the second time block to the AP in the same orthogonal frequency division multiple access OFDMA subband;
  • the transceiver module 1701 is further configured to receive a data packet sent by the STA, where the data packet includes a data field, where the data field includes a first time block and a second time block, the first time block and the The second time block is transmitted by using the same physical parameter of the space-time stream, where the first time block and the second time block respectively carry a media access control MAC frame;
  • the processing module 1702 is configured to parse the MAC frame carried by the first time block and the second time block respectively.
  • the first time block occupies a preset number or an indicated number of OFDM symbols; the processing module 1702 is further configured to:
  • the processing module 1702 is further configured to calculate, according to the total length of the obtained data field and the preset number of the first time block or the indicated number of OFDM symbol lengths, the second time block Occupied OFDM symbol length;
  • the processing module 1702 is further configured to: collect data of the second time block according to an OFDM symbol length occupied by the second time block.
  • the resource scheduling information further includes a physical parameter of the second non-empty time stream corresponding to the second time block, where the physical parameter of the second non-empty time stream is used to indicate the second time block a coded modulation mode of the carried MAC frame; the first time block uses a preset physical parameter of the first non-space time stream to indicate a coded modulation mode of the MAC frame carried by the first time block;
  • the processing module 1702 is specifically configured to:
  • the processing module 1702 is further specifically configured to:
  • the resource scheduling information further includes physical parameters of the first non-empty time stream and physical parameters of the second non-empty time stream, physical parameters of the first non-empty time stream and the first time block
  • the physical parameter of the second non-empty time stream is corresponding to the second time block
  • the physical parameter of the first non-empty time stream and the physical parameter of the second non-empty time stream are respectively used to indicate a coding and modulation manner of the MAC frame carried by the first time block and the second time block;
  • the processing module 1702 is specifically configured to:
  • the processing module 1702 is further specifically configured to:
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the second indication information.
  • another embodiment of the access point AP in the embodiment of the present invention includes:
  • the transceiver module 1801 is configured to send a trigger frame to the station STA, where the trigger frame includes resource scheduling information, where the resource scheduling information includes physical parameters of the space-time stream;
  • 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, where the first indication information is used to indicate the number of time blocks included in the data field. ;
  • the first time block and the second time block are both transmitted by using the same physical parameters of the space-time stream, the first time The block and the second time block respectively carry a media access control MAC frame;
  • the processing module 1802 is configured to control the transceiver module 1801 to send a trigger frame to the STA, and control the transceiver module 1801 to receive the data packet sent by the STA.
  • the first time block occupies a preset number or an indicated number of orthogonal frequency division multiplexing OFDM symbols.
  • the data packet further includes second indication information, where the second indication information is used to indicate physical parameters of the non-empty time stream of the first time block and/or the second time block, The physical parameters of the non-empty time stream are used to indicate the coded modulation mode of the corresponding time block.
  • the second time block adopts a physical parameter of a preset non-empty time stream;
  • the first time block adopts a preset physical parameter of the non-empty time stream.
  • the occupying, by the first time block, a preset number of OFDM symbols includes:
  • the first time block occupies a fixed number of OFDM symbols that the STA pre-sets the first time block by default; or
  • the first time block occupies a number of OFDM symbols corresponding to an OFDMA subband size for transmitting the data field.
  • 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 a number of OFDM symbols of a length indicated by the third indication information.
  • FIG. 19 is another schematic 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 a memory 1904.
  • the STAs according to embodiments of the present invention may have more or fewer components than those shown in FIG. 19, may combine two or more components, or may have different component configurations or settings, and each component may include one Hardware, software, or a combination of hardware and software, including multiple signal processing and/or application specific integrated circuits.
  • the transmitter 1902 can implement the functions of the transceiver module 1301 described in the embodiment of FIG. 13 and the transceiver module 1401 described in the embodiment of FIG. 14 and the transceiver module 1501 described in the embodiment of FIG. ;
  • the receiver 1901 can implement the functions of the transceiver module 1301 described in the embodiment of FIG. 13 and the transceiver module 1401 described in the embodiment of FIG. 14 and the transceiver module 1501 described in the embodiment of FIG. 15 for performing a receiving operation;
  • the processor 1903 can implement the functions of the processing module 1302 described in the embodiment of FIG. 13, the processing module 1402 in the embodiment of FIG. 14, and the processing module 1502 described in the embodiment of FIG.
  • 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 a memory 2004.
  • the AP may have more or less components than those shown in FIG. 20, may combine two or more components, or may have different component configurations or settings, and each component may include one Hardware, software, or a combination of hardware and software, including multiple signal processing and/or application specific integrated circuits.
  • the transmitter 2002 can implement the transceiver module 1601 described in the embodiment of FIG.
  • the receiver 2001 can implement the functions of the transceiver module 1601 described in the embodiment of FIG. 16 and the transceiver module 1701 described in the embodiment of FIG. 17 and the transceiver module 1801 described in the embodiment of FIG. 18 for performing a receiving operation;
  • the processor 2003 can implement the functions of the processing module 1602 described in the embodiment of FIG. 16 and the processing module 1702 described in the embodiment of FIG. 17 and the processing module 1802 described in the embodiment of FIG. 18.
  • the device used in the description of the solution of the present invention is a base station eNB and a user equipment UE, and in actuality, the solution of the present invention is equally applicable to other devices in a peer network.

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Abstract

L'invention concerne un procédé de transmission de données utilisé pour réduire le surdébit d'un système. Dans le procédé décrit dans les modes de réalisation de la présente invention : un paquet de données envoyé par un point d'accès (AP) à une station (STA) contient des informations de programmation de ressources et un champ de données ; les informations de programmation de ressources comprennent des premières informations d'indication ; les premières informations d'indication indiquent que le champ de données comprend un premier bloc temporel et un second bloc temporel ; le premier bloc temporel et le second bloc temporel transportent respectivement des trames MAC, et adoptent tous les deux le même paramètre physique d'un flux espace-temps pour la transmission ; et la STA analyse les trames MAC transportées respectivement par le premier bloc temporel et le second bloc temporel. De cette façon, la transmission de différentes trames MAC dans la même sous-bande est réalisée, ce qui permet d'améliorer l'efficacité d'échange de données d'un AP et d'une STA, et de réduire le surdébit d'un système.
PCT/CN2016/084274 2015-09-07 2016-06-01 Procédé et dispositif de transmission de données Ceased WO2017041540A1 (fr)

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CN201510562593.5A CN106506128B (zh) 2015-09-07 2015-09-07 一种数据传输的方法及装置

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