WO2019128957A1 - 无线局域网中多信道混合传输方法和装置 - Google Patents

无线局域网中多信道混合传输方法和装置 Download PDF

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Publication number
WO2019128957A1
WO2019128957A1 PCT/CN2018/123356 CN2018123356W WO2019128957A1 WO 2019128957 A1 WO2019128957 A1 WO 2019128957A1 CN 2018123356 W CN2018123356 W CN 2018123356W WO 2019128957 A1 WO2019128957 A1 WO 2019128957A1
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Prior art keywords
channel
information
stas
control information
sta
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PCT/CN2018/123356
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English (en)
French (fr)
Inventor
于健
淦明
李云波
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华为技术有限公司
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Publication of WO2019128957A1 publication Critical patent/WO2019128957A1/zh
Priority to US16/912,258 priority Critical patent/US11218351B2/en
Priority to US17/550,690 priority patent/US12003457B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • 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
    • H04L27/2602—Signal structure
    • H04L27/2603—Signal structure ensuring backward compatibility with legacy system
    • 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26132—Structure of the reference signals using repetition
    • 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26136—Pilot sequence conveying additional information
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2666—Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1221—Wireless traffic scheduling based on age of data to be sent
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • 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
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]

Definitions

  • the present application relates to the field of wireless communications, and in particular to a multi-channel hybrid transmission method and apparatus in a wireless communication system.
  • the wireless local area network (WLAN) communication standard evolves and evolves from 802.11a and 802.11g through 802.11n, 802.11ac, 802.11ax, etc., the bandwidth and space-time flow of the transmission are gradually changed.
  • the 802.11a or 802.11g standard allows transmission bandwidth of 20MHz.
  • the 802.11n standard allows transmission bandwidth of 20MHz or 40MHz.
  • the current 802.11ax allows transmission bandwidth of 20MHz, 40MHz, 80MHz or 160MHz.
  • WLAN systems use larger bandwidth. Expect a higher transmission rate.
  • the channel in the WLAN standard is usually divided into a primary channel and a secondary channel.
  • AP access point
  • STA station
  • the primary channel is first monitored.
  • the primary channel is idle, Further monitoring whether the slave channel is idle, and when the primary channel is occupied, even if other slave channels are idle, data transmission cannot be performed on the idle slave channel, and thus the channel utilization is low.
  • a channel bandwidth of 160 MHz, including a primary channel, and multiple slave channels when a station following a standard protocol such as 802.11a or 802.11g or 802.11n performs data transmission on a primary channel or a partial channel including a primary channel, Other stations or access points are listening to the main channel being busy, and data transmission is not possible even if other slave channels are idle.
  • a standard protocol such as 802.11a or 802.11g or 802.11n
  • a WLAN system especially when the channel contains a primary channel and one or more secondary channels, that is, multiple channels, it is important to improve channel utilization and transmission efficiency.
  • Currently proposed multi-channel hybrid transmission technology that is, one type of station can occupy the primary channel and one or more secondary channels for data transmission, and another type of station can occupy other one or more secondary channels for simultaneous data transmission, thereby improving the channel. Utilization, but lack of flexibility.
  • the present application provides a data transmission method and apparatus for use in a wireless communication system.
  • the embodiment of the present application provides an access point side data transmission method, including: an access point AP transmitting first control information for one or more first station STAs on at least a primary channel;
  • the control information includes: a first indication for indicating one or more subchannels; the access point AP transmitting a first data packet for the one or more first STAs on the first partial channel of the total channel, wherein the first data
  • the second control information is included in the packet on the one or more slave channels indicated by the first indication; meanwhile, the AP transmits the second data packet for the one or more second sites on the second partial channel of the total channel;
  • the first control information and/or the second control information includes resource scheduling information for one or more first STAs, where the first STA and the second STA have different capability sets.
  • the first STA may follow the first standard
  • the second STA may follow the second standard
  • the first standard may be backward compatible with the second standard
  • the first control information may include resource scheduling information for the one or more first STAs
  • the second control information may also include resource scheduling information for the one or more first STAs.
  • the first control information does not include resource scheduling information for the one or more first STAs
  • the second control information includes resource scheduling information for the one or more first STAs, so that Reduce the overhead of the first control information.
  • the first control information may include resource scheduling information of the first part of the one or more first STAs
  • the second control information may include, for the one or more first STAs The second part of the resource scheduling information of the first STA, so that the resource scheduling information for one or more first STAs can be allocated in two control information, and the overhead of the two is balanced.
  • the first control information may further include a second indication, configured to indicate that the data for the one or more first STAs is not carried on the primary channel after the first control information, so that the first STA is receiving After the first control information, it is determined that the data for one or more first STAs is not carried on the primary channel.
  • the first indication may be an index of one or more subchannels, and when the one or more subchannels are two subchannels, the first indication includes: the first one of the two subchannels Subchannel index, and subchannel index of the second subchannel of the two subchannels.
  • the first STA may quickly acquire the channel for reading the resource scheduling information according to the first indication, and only need to read the resource scheduling information on the subchannel indicated by the first indication to obtain a complete resource scheduling for the first part of the channel. The information improves the efficiency of the first STA to read the resource scheduling information.
  • the first control information may include a common information part and a resource scheduling information part, wherein the first indication may be a bandwidth BW included in the common information part.
  • the data field of the first data packet includes first trigger information
  • the data field of the second data packet includes second trigger information
  • the first trigger information is used to trigger one or more first STAs.
  • the first part of the channel performs uplink data transmission; the second trigger information is used to trigger one or more second STAs to perform uplink data transmission on the second part of the channel.
  • the embodiment of the present application provides another access point side data transmission method, where the method includes: the access point AP sends the first station STA for the first part of the total channel. a data packet, and simultaneously transmitting a second data packet for the one or more second station STAs on the second channel except the first partial channel on the total channel; wherein the second data packet includes two adjacent messages
  • the field, the four subcarriers in the two adjacent signaling field symbols, carries information for indicating the first part of the channel to the first STA.
  • the information indicating the first part of the channel is specifically: carrying the first set of values on the four subcarriers in the first signaling field symbol of the two adjacent signaling fields, adjacent to each other Carrying a second set of values on the four subcarriers in the second signaling field symbol of the two signaling fields, so that the first STA determines the first part of the channel according to the first set of values and the second set of values;
  • the subcarrier index of the four subcarriers is [-28, -27, 27, 28];
  • At most one of the first set of values and the second set of values is [-1, -1, -1, 1], and the first set of values is different from the second set of values.
  • the second partial channel includes at least a primary channel, and the first partial channel includes one or more secondary channels.
  • an embodiment of the present application provides a site-side data transmission method, including: a first STA receives a second data packet on a second partial channel that includes a primary channel, where the second data packet includes an adjacent Two signaling fields, the four subcarriers in the adjacent two signaling field symbols carrying information for indicating the first partial channel to the first STA; The four subcarriers within the adjacent two signaling field symbols of the second data packet determine the first partial channel, and the first data packet is received on the first partial channel.
  • the determining, by the first STA, the first partial channel includes: the first STA performing channel estimation on four subcarriers in the first signaling field symbol, and, according to the channel estimation, the Decoding, by the first STA, the four subcarriers in the second signaling field symbol to obtain a third set of values, determining whether the third set of values is equal to the second set of values; or, the first STA Determining whether the difference result is the first value set of the four subcarrier transmissions in the first signaling field symbol and the difference result of the second value set of the four subcarrier transmissions in the second signaling field symbol Not 0 or greater than or equal to the preset threshold.
  • the first STA can accurately determine the first partial channel.
  • the first STA determines the The bandwidth of the second portion of the second data packet and determining the first partial channel. By using the above judging method, the first STA can accurately determine the first part of the channel, thereby parsing its own data.
  • the embodiment of the present application provides a data transmission device, specifically, an access point AP, where the access point has a function of implementing an actual access point behavior in the foregoing method, and the function may be implemented by using hardware, or A software implementation that performs a response through hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the access point AP includes a processor, a transceiver configured to support an access point to perform corresponding functions in the methods described above.
  • the transceiver is configured to support communication between the access point and the first STA and the second STA, and send the control information, the data packet or the instruction involved in the foregoing method to the first STA and the second STA.
  • the access point can also include a memory for coupling with the processor that retains program instructions and data necessary for the access point.
  • an embodiment of the present application provides a site, where the site has a function of implementing behavior of a first STA in the foregoing method design.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the modules can be software and/or hardware.
  • the structure of the station includes a transceiver, the processor, wherein the transceiver is configured to support communication between the first STA and the access point AP, receive first control information sent by the AP, and Receiving a first data packet sent by the AP on the first partial channel.
  • the processor may acquire complete resource scheduling information for the one or more first STAs according to the first control information and the second control information, thereby parsing the data field of the first data packet.
  • the site may also include a memory for coupling with the processor that holds program instructions and data necessary for the site.
  • the embodiment of the present application provides a wireless communication system, where the system includes the access point described in the foregoing aspect, and the first STA and the second STA, where the first STA and the second STA have different capabilities. set.
  • the application provides a computer readable storage medium having stored therein instructions executable by one or more processors on a processing circuit. When it is run on a computer, the computer is caused to perform the methods described in the various aspects above.
  • the present application provides a computer program product comprising instructions that, when run on a computer, cause the computer to perform the methods described in the various aspects above.
  • the present application provides a chip system including a processor for supporting a data transmitting device to implement the functions involved in the above aspects, such as generating or processing data and/or information involved in the above method.
  • the chip system further includes a memory for holding program instructions and data necessary for the data transmitting device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the data when the second STA data is sent on a part of the channel including the primary channel, the data may be sent to the first STA on the other secondary channels, thereby improving channel utilization and passing Carrying, in the control information, an indication that the first STA may acquire one or more subchannels of the resource scheduling information, so that the first STA may acquire resource scheduling information and parse its own data packet in the indicated one or more subchannel channels, and is effective
  • the complexity of reading the resource scheduling information by the first STA is also reduced, the transmission efficiency is improved, and a more flexible hybrid transmission mode can be supported.
  • FIG. 1 is a schematic diagram of a possible application scenario of an embodiment of the present application
  • FIG. 2 shows a schematic diagram of channel division in an 802.11 system
  • FIG. 3 is a schematic flowchart diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 4a is a schematic diagram of a first control information provided by an embodiment of the present application.
  • FIG. 4b is a schematic diagram showing still another first control information provided by an embodiment of the present application.
  • 4c is a schematic diagram of a physical layer preamble according to a first standard provided by an embodiment of the present application.
  • FIG. 4 is a timing diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a channel indication provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 7 is a timing diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 9 is a timing diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 10 is a schematic flowchart diagram of a data transmission method provided by an embodiment of the present application.
  • FIG. 11 is a timing diagram showing a data transmission method provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a trigger frame frame according to a first standard provided by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of another trigger frame frame provided by an embodiment of the present application.
  • FIG. 14 is a timing diagram showing still another data transmission method provided by an embodiment of the present application.
  • FIG. 15 is a timing diagram showing still another data transmission method provided by an embodiment of the present application.
  • FIG. 16 is a schematic diagram of a PPDU complying with a first standard provided by an embodiment of the present application.
  • FIG. 17 is a schematic diagram of still another PPDU according to the first standard provided by the embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of an access point according to an embodiment of the present disclosure.
  • FIG. 19 is a schematic structural diagram of a site provided by an embodiment of the present application.
  • the communication system 100 includes an access point AP 103, one or more first STAs 101, and one or more second STAs 102 having a different set of capabilities than the second STAs 102.
  • one or more first STAs 101 may have a first capability set
  • one or more second STAs 102 may have a second capability set
  • one or more first sites STA 101 having a first capability set may Following the first criterion
  • one or more second site STAs 102 having a second set of capabilities may follow the second standard.
  • the first STA 101 having the first capability set can be higher than the second STA 102 having the second capability set, and the STA 102 having the second capability set can be a legacy device.
  • the first standard may be backward compatible with the second standard.
  • the first standard may be a next generation wireless communication standard protocol of 802.11ax or a next generation wireless communication standard protocol
  • the second standard may be 802.11a or 802.11g.
  • the first STA 101 having the first capability set can support the first standard, wherein the first standard can be backward compatible with the second standard, having the first
  • the second STA 102 of the second capability set can support both the first standard and the second standard, but operates in the second standard mode.
  • the access point AP 103 is a device having a wireless communication function, having a function of communicating with one or more first STAs 101, and having a function of communicating with one or more second STAs 102.
  • the access point AP 103 may be an AP that performs data transmission using the 802.11 protocol.
  • multiple site STAs are connected to the AP via a WiFi-compliant wireless link to obtain general connectivity to the Internet or to other wide area networks.
  • the STA can also be used as an AP. It is to be understood that the number of the APs and the STAs in the WLAN communication system 100 is merely exemplary and does not constitute a limitation on the embodiments of the present application.
  • the first STA 101 and the second STA 102 involved in the present application may also be various user terminals, user devices, and access devices having wireless communication functions.
  • a subscriber station, subscriber unit, mobile station, user agent, user equipment or other name wherein the user terminal can include various handheld devices having wireless communication capabilities, in-vehicle devices, wearable devices, computing devices, or other devices connected to the wireless modem Processing equipment, and various forms of User Equipment (UE), Mobile Station (MS), Terminal, Terminal Equipment, Portable Communication Equipment, Handheld, Portable Computing Equipment An entertainment device, a gaming device or system, a global positioning system device or any other suitable device configured to communicate over a network via a wireless medium, and the like.
  • UE User Equipment
  • MS Mobile Station
  • Terminal Terminal Equipment
  • Terminal Equipment Terminal Equipment
  • Portable Communication Equipment Handheld
  • An entertainment device a gaming device or system
  • the devices mentioned above are collectively referred to
  • the access point AP 103 involved in the present application is a device deployed in a wireless communication network to provide a wireless communication function for a station, and can be used as a hub of a WLAN, and the device can have a full-duplex function, and the access point
  • the AP 103 can also be a base station, a router, a gateway, a relay, a communication server, a switch, or a bridge.
  • the base station can include various forms of macro base stations, micro base stations, relay stations, and the like.
  • the above-described devices that provide wireless communication function services for the station STA are collectively referred to as an access point AP.
  • a channel is typically divided into a primary channel and a secondary channel, where a secondary channel may include one or more subchannels.
  • the bandwidth is 20MHz
  • the channel has a bandwidth of 20MHz, and only has a bandwidth of 20MHz.
  • a channel with a bandwidth of 20MHz is included as the main channel.
  • One or more 20 MHz channels are slave channels.
  • the channel bandwidth is 160 MHz
  • the channels are sequentially numbered as channel 1 to channel 8, each of which represents a 20 MHz channel; wherein channel 1 represents a 20 MHz primary channel (primary 20 MHz channel, referred to as P20).
  • Channel 2 represents a 20MHz secondary channel (S20), and a 40MHz secondary channel (S40) contains two subchannels with a bandwidth of 20MHz, namely channel 3 and channel 4, and an 80MHz slave.
  • the secondary 80MHz channel (S80) contains four subchannels with a bandwidth of 20MHz, which are channels 5, 6, 7, and 8, respectively, where channels 5 and 6, channels 6 and 7, and channels 7 and 8 are adjacent, respectively.
  • a 40 MHz slave channel means that the bandwidth of the slave channel is 40 MHz, and includes two 20 MHz slave channels.
  • channel 1 is the main channel.
  • the 802.11 system supports channel bandwidths of various sizes, and the bandwidth may be 20MHz, 40MHz, 80MHz, 160MHz continuous bandwidth, or one of 80MHz+80MHz discontinuous bandwidth.
  • the channel bandwidth may be 320 MHz or the like, and the channel division method may be similar to the 160 MHz channel described above, and details are not described herein again.
  • the "simultaneous" involved in this embodiment is substantial, and there is no need to strictly limit the processing on the different channels without any time difference, and only needs to satisfy the whole.
  • the above processing may be substantially the same in time dimension.
  • the AP may be able to multiplex OFDM symbols to, for example, four devices at a time on an 80 MHz bandwidth, with each device utilizing a 20 MHz bandwidth. Therefore, multiple access may be beneficial in some respects as it may allow the AP to use the spectrum available to it more efficiently.
  • FIG. 3 is a schematic flowchart diagram of a data transmission method according to an embodiment of the present invention.
  • the access point AP generates first control information for one or more first STAs, where the first control information includes: a first indication, used to indicate one or more subchannels;
  • the access point AP sends the first control information on at least the primary channel.
  • the AP may first perform channel carrier monitoring.
  • the AP monitors that the total channel is all idle, or the primary channel and the partial slave channel are idle in the total channel, the AP may perform multi-channel hybrid transmission.
  • the total channel includes a primary channel and one or more secondary channels, and one secondary channel may include one or more subchannels;
  • the foregoing first control information may be carried by a scheduling frame, which may be a MAC (Medium Access Control, MAC) frame, and may be one of a control frame, a management frame, or a data frame.
  • a scheduling frame which may be a MAC (Medium Access Control, MAC) frame, and may be one of a control frame, a management frame, or a data frame.
  • MAC Medium Access Control
  • the access point AP sends a first data packet for one or more first STAs on a first part of a channel of the total channel; and, at the same time, transmits to one or a second part of the channel of the total channel. a second data packet of the plurality of second STAs;
  • the first data packet includes second control information for the one or more first STAs; the first partial channel includes the one or more subchannels, and the one or more subchannels carry the second Control information, the second partial channel includes the primary channel, the first partial channel does not overlap with the second partial channel; the first control information and/or the second control information further includes Resource scheduling information of one or more first STAs; wherein the first STA and the second STA have different capability sets.
  • the access point AP After transmitting the first control information, the access point AP transmits a data packet for the one or more first STAs on the first part of the channel of the total channel, and at the same time, transmits on the second part of the channel of the total channel A second data packet of one or more second STAs.
  • the second data packet when the AP sends the first data packet on the first partial channel of the total channel, the second data packet can also be received on the second partial channel of the total channel.
  • the second data packet includes uplink data of the one or more second STAs.
  • the first STA receives, by the first channel, first control information for one or more first station STAs.
  • the first STA receives the first data packet on the first partial channel of the total channel, where the first data packet includes second control information for the one or more first STAs; the first partial channel includes the One or more subchannels, and the one or more subchannels carry second control information; the first control information and/or the second control information further includes resource scheduling information for the one or more first STAs;
  • the first STA parses the data field of the first data packet according to the first control information and the second control information.
  • the first indication in the first control information may be a bitmap composed of one or more bits to indicate the one or more subchannels, where each bit corresponds to a 20 MHz channel, The first bit corresponds to the primary channel.
  • the first indication can also be reused to indicate the bandwidth of the total channel. For example, when the first indicated bit bitmap is 0011, wherein the indicated one or more subchannels are channels 3 and 4 in FIG. 2, and the total channel bandwidth is 80 MHz; for example, when the first indication bit bitmap When it is 00111100, the indicated one or more subchannels are channels 3, 4, 5, and 6 in Figure 2, and the total channel bandwidth is 160 MHz.
  • the first indication may be index information of one or more subchannels, for example, when one or more subchannels are two subchannels, the first indication may include, the first one of the two subchannels Index information, and index information of the second subchannel of the two subchannels.
  • the first control information may further include: a second indication, configured to indicate that the primary channel after the first control information does not carry data for the one or more first STAs; It may also be referred to as a hybrid transmission indication identifier, and after indicating the first control information to the first STA, the AP performs mixed data transmission;
  • the foregoing second indication may be composed of one or more bits, and the primary channel after the first control information is indicated to the one or more first STAs is not carried on the primary channel for the one or more The data of the first STA.
  • the second indication adopts one bit and the value is 0, it indicates that the primary channel does not carry data for the one or more first STAs, and when the second indication takes a value of 1, indicates that the primary channel is Carrying data for the one or more first STAs, that is, no hybrid transmission;
  • the first control information may not include the second indication information, but adopt a manner agreed by the protocol. For example, after the first STA receives the first control information, the first STA determines that the AP performs hybrid transmission after transmitting the first control information, and the data of the first STA is not carried on the primary channel.
  • the structure of the first control information may be, for example, as shown in FIG. 4a.
  • the first control information 401.1 may include: a first indication 401.2, a second indication 401.3, and may further include other information 401.4.
  • the other information 401.4 may include, but is not limited to, any combination of one or more of the following:
  • the uplink and downlink indications the basic service set color (BSS color), the spatial reuse parameters, and the modulation and coding scheme.
  • BSS color basic service set color
  • spatial reuse parameters the spatial reuse parameters
  • modulation and coding scheme the modulation and coding scheme
  • the uplink and downlink indications are used to indicate that the data packet sent by the first control information is an uplink or downlink data packet. At least indicating that the first data packet is uplink or downlink; and further indicating that the second data packet is uplink or downlink;
  • the first data packet and the second data packet are in the same direction, and the same indication indicating multiplexing may be used to indicate that the first data packet and the second data packet are uplink, or the first One data packet and the second data packet are downstream.
  • the direction of the foregoing transmission may be: the first data packet is uplink, and the second data packet is downlink; or the first data packet is indicated as downlink, and the The second data packet is uplink;
  • the basic service set color BSS Color is used to identify a basic service set (BSS) in which the first STA that follows the first standard is located;
  • the bandwidth of the second part of the channel of the total channel helps the first STA to combine the total channel bandwidth, and quickly determines the first data packet of the first STA and the channel where the second control information is located.
  • the structure of the first control information may be as shown in FIG. 4b, and the first control information may include a common information part 401.5 and a resource scheduling information part 401.6.
  • the public information part 401.5 may include the first indication 401.2, and may optionally include the other information 401.4 described above.
  • the resource scheduling information portion 401.6 may optionally include resource scheduling information 401.7 for the primary channel, and may optionally include resource scheduling information 401.8 for all or a portion of the one or more first STAs.
  • the resource scheduling information 401.7 for the primary channel may include resource unit allocation information of the primary channel and information of the scheduled station on the resource unit of the primary channel, and the information of the scheduled station may include: an associated identifier AID of the scheduled station ( Association Identifier (AID), the number of Space Time streams (NSTS) of the scheduled station, whether to use beamforming transmission and modulation and coding scheme MCS.
  • AID Association Identifier
  • NSTS Space Time streams
  • the second indication may include: the resource unit allocation information of the primary channel indicates that the resource unit allocated to the one or more first STAs on the primary channel is empty, for example, the resource unit allocation information may be The value is set to 01110001, to indicate that the resource unit RU (Resource Unit, RU for short) in the primary channel is an empty 242-tone (subcarrier) RU, that is, the first STA on the primary channel that does not carry the first standard. data.
  • the second indication may include: the AID of the scheduled station on the primary channel is a reserved value.
  • the AID of each STA of one or more stations scheduled by the resource scheduling information of the primary channel may be set to 2046, and the first STA cannot identify the reserved site identifier, and then determine that one of the primary channels is not scheduled or The plurality of first STAs perform data transmission, that is, data that does not carry one or more first STAs on the primary channel.
  • the first control information and/or the second control information further includes resource scheduling information for the one or more first STAs, where the resource scheduling information for the one or more first STAs may include: one or more The resource unit allocation information of one STA, and the station information of one or more first STAs, the site information may include an association identifier AID or the like.
  • an OFDMA system includes multiple subcarriers, but multiple subcarriers are divided into multiple groups of subcarriers, where a group of subcarriers may constitute one resource unit (RU).
  • RU resource unit
  • one Resource Unit (RU) contains at least 26 subcarriers, and the resource unit including 26 subcarriers is called 26-tone RU. Multiple sites can be scheduled on one resource unit.
  • At least one of the first control information and the second control information includes resource scheduling information for the one or more first STAs, where the resource scheduling information 401.8 of the first control information includes The resource scheduling information and the second control information of the one or more first STAs also include resource scheduling information for the one or more first STAs; or the first control information does not include the one or more first STAs
  • the resource scheduling information, that is, the resource scheduling information 401.8 is not included, and the second control information includes resource scheduling information for the one or more first STAs; for example, when the first data packet includes data of four first STAs, 4
  • the first STAs are STA1, STA2, STA3, and STA4, and the resource scheduling information 401.8 of the first control information includes resource scheduling information for STA1, STA2, STA3, and STA4, and the second control information also includes STA1, STA2, and STA3.
  • the first control information further includes resource scheduling information for the first part of the first STA of the one or more first STAs, where the second control information includes the one or more first STAs.
  • the second part of the resource scheduling information of the first STA it can be understood that the intersection of the first part of the first STA and the second part of the first STA may be empty or not empty, but the first part of the first STA and the second part
  • the first STA of the first STA is the one or more first STAs; for example, the one or more first STAs are STA1, STA2, STA3, and STA4, where the resource scheduling information 401.8 of the first control information is included for STA1.
  • the resource scheduling information of the STA2, the second control information includes resource scheduling information for STA3 and STA4; for example, the resource scheduling information 401.8 of the first control information includes resource scheduling information for STA1, STA2, and STA3, and the second control information includes For STA2, STA3, and STA4 resource scheduling information.
  • the structure of the first control information may also be in other forms.
  • the structure of the first control information shown in FIG. 4a and FIG. 4b is merely exemplary and not limiting.
  • the first data packet includes a physical layer preamble following a first criterion and a data field for one or more first STAs;
  • the second data packet includes a physical layer preamble following the second criterion and data for one or more second STAs Field
  • the symbol length of the data field of the first data packet of the first STA may be the same as the symbol length of the data field of the second data packet of the second STA.
  • the second STA is a station that complies with a standard protocol such as 802.11a or 802.11g or 802.11n or 802.11ac
  • the data symbol length of the data field of the second data packet is 1X
  • the data of the first data packet data field The symbol length is also 1X;
  • the second STA is a HE STA (High Efficiency Station, referred to as HE STA) that complies with the 802.11ax standard protocol
  • the data symbol length of the second data packet data field is 4X
  • the data field of the first data packet The data symbol length is also 4X.
  • the second control information is included in the first data packet sent on the first part of the channel of the total channel, and the second control information may be included in the physical entity that follows the first standard carried on the one or more subchannels indicated by the first indication.
  • the second control information can be repeated on the first partial channel except for the other subchannels of the one or more subchannels indicated by the first indication.
  • the physical layer preamble according to the first standard may include: a legacy short training field 404.1 (Legacy Short Training Field, L-STF), and a traditional long training field 404.2 (Legacy Long Training Field, L-LTF for short). ), the traditional signaling field 404.3 (Legacy Signal Field, L-SIG for short) is used to ensure backward compatibility.
  • the physical layer preamble according to the first standard may further include a signaling field A (Signal A, SIG-A for short) 404.4 and a signaling field B (Signal B, SIG-B for short) 404.5, which is required to carry the first STA to read data. Relevant signaling information and resource scheduling information.
  • Short training field (STF) and long training field (LTF) can be used for AGC (Multiple Input Multiple Output (MIMO)). Control, automatic gain control) and channel measurement.
  • the long training sequence LTF field may contain multiple LTF symbols for channel measurement on multiple space-time streams.
  • the second control information can be included in signaling field B 404.5.
  • the second control information may be a resource allocation field in the signaling field B.
  • the first STA receives the first control information on the primary channel, and the first STA may determine, according to the first indication in the first control information, that the data of the first STA is not carried on the primary channel after the first control information, or After the first control information is determined, the AP performs hybrid transmission; and according to the first indication, the first STA determines one or more subchannels including the second control information indicated by the first indication, and is in the indicated one or more subchannels And acquiring second control information, and acquiring all resource scheduling information according to the first control information and/or the second control information.
  • the second control information includes resources of the second part of the first STA of the one or more first STAs.
  • scheduling information the first STA acquires all resource scheduling information by combining the first control information and the second control information. Further, the first STA determines the resource unit information that is scheduled according to the obtained resource scheduling information, so that the data field in the first data packet is parsed to obtain a data part corresponding to itself.
  • the total channel is 160 MHz as an example; wherein the total channel includes a 20 MHz primary channel, a 20 MHz secondary channel, a 40 MHz secondary channel (including two 20 MHz subchannels including channels 3, 4), and an 80 MHz secondary channel.
  • a control information 401.1 includes a first indication, and optionally resource allocation information including a second indication, and STA1 and STA2 in the one or more first STAs, where the one or more subchannels indicated by the first indication are Channel 6 or channel 8, the first control information 401.1 is carried in the MAC layer frame scheduling frame 401, wherein the scheduling frame 401 is carried in a data field portion of a physical layer protocol data unit (PPDU) 402.
  • PPDU physical layer protocol data unit
  • the AP may send the PPDU 402 at least on the primary channel; further, after the AP sends the PPDU 402 carrying the first control information, the AP may go to the at least one of the 20 MHz primary channel (channel 1) and the 20 MHz secondary channel (channel 2).
  • Two STAs send the second Data packet 403.2, which may also transmit a second data packet (not shown in the figure) on only the 20 MHz primary channel (channel 1), wherein the second data packet 403.2 contains a physical layer preamble and one or more following the second standard a data field of the second STA; at the same time, the AP transmits a first data packet 403.1 for one or more first STAs on a first partial channel (channels 5, 6, 7, 8) of the total channel, the first partial channel comprising the first Indicating one or more subchannels (channel 6 and channel 8) indicated, wherein the first data packet 403.1 includes a physical layer preamble following the first criterion and a data field of one or more first STAs, and on channel 6 and
  • the physical layer preamble according to the first standard carried on the channel 8 includes second control information, where the second control information includes resource scheduling information for STA3 and STA4 in one or more first STAs; a PPDU 402 of control information, the first STA parses the
  • a STA can quickly obtain all resource scheduling information for the first STA during the hybrid transmission, thereby reducing the complexity of the first STA acquiring the resource scheduling information.
  • the data field of the first data packet sent by the AP may include first trigger information, where the first trigger information is used to trigger one or more first
  • the STA performs uplink data transmission on the first part of the channel of the total channel
  • the data field of the second data packet sent by the AP may include second trigger information, where the second trigger information is used to trigger one or more second STAs on the total channel.
  • the second part of the channel performs uplink data transmission.
  • the first STA parses the data field of the first data packet, and acquires the first trigger information included in the data field; further, according to the first trigger information, one or more first STAs On the first part of the channel, the uplink data is transmitted using the designated resource unit.
  • the one or more second STAs may also receive the second data packet on the second partial channel, and according to the second trigger information in the data field, the one or more second STAs are used on the second partial channel.
  • the specified resource unit sends uplink data.
  • the second trigger information may include a public information field and one or more user information fields, where the public information field may include a bandwidth sub-field, configured to indicate that the one or more second STAs send the bandwidth of the uplink data packet;
  • the user information field may include: a related identifier identifier AID of the second STA, a resource scheduling information (RU Allocation), a modulation and coding scheme MCS, and the like, where the resource scheduling information corresponding to the user information field is used to indicate at least A resource unit allocated to the second STA corresponding to the AID on the primary channel. Therefore, one or more second STAs can be scheduled to perform uplink data transmission on at least the primary channel.
  • the first trigger information may also include a public information field and one or more user information fields, where the public information field may include a bandwidth sub-field, configured to indicate that the one or more first STAs send the bandwidth of the uplink data packet;
  • Each user information field may include: an associated identifier AID of the first STA, a resource scheduling information (RU Allocation), a modulation and coding scheme MCS, and the like, wherein the resource scheduling information corresponding to the user information field is used. Indicates a resource unit allocated to the first STA corresponding to the AID on the first partial channel of the total channel. Therefore, one or more first STAs can be scheduled to perform uplink data transmission on the first partial channel.
  • the first control information may be a signaling field that follows the first standard, and the structure of the signaling field that follows the first standard may be similar to the structure of the signaling field that follows the second standard.
  • the first control information may include a field similar to HE SIG-B (High Efficiency SIG-B, referred to as HE SIG-B) defined in the 802.11ax standard, and the first control information may include a Common Block field and a user specific field, where the common block field is mainly used to indicate the allocation of the resource unit, and includes a resource unit allocation field (Resource Unit Allocation subfield), where the resource unit allocation field can be used to indicate the resource unit in the frequency domain.
  • the station-by-site field in the user-specific field may contain a site identifier (generally the STA's association identifier AID) that can be scheduled on the corresponding resource unit, a single user's number of spatial streams, beamforming transmission Transmit Beamforming, modulation and coding scheme MCS, dual coding modulation (DCM) and other information.
  • a site identifier generally the STA's association identifier AID
  • AID association identifier
  • MCS modulation and coding scheme
  • DCM dual coding modulation
  • the second indication may be indicated by a Resource Unit Allocation subfield, for example, a value for a resource unit allocation subfield on a 20 MHz primary channel may be set to 01110001 to indicate resources in the primary channel.
  • a unit (RU) is an empty 242-tone (subcarrier) RU, that is, data of the first STA that does not carry the first standard on the primary channel.
  • the second indication may be indicated by an Association Identifier (AID) of a site corresponding to each resource unit in the 20MHz primary resource unit allocation field, specifically, each of the sites may be AID is set to a reserved value.
  • AID of each STA may be set to 2046, which implicitly indicates that the RU on the primary channel is empty, that is, the data of the first STA that does not carry the first standard on the primary channel.
  • the first control information may further include a bandwidth BW (bandwidth, abbreviated as BW), an uplink and downlink indication, a basic service set color BSS Color, a spatial reuse parameter (SRP), and a signaling field B (Signal B, SIG for short).
  • BW bandwidth, abbreviated as BW
  • SRP spatial reuse parameter
  • SIG signaling field B
  • the first control information may further include a bandwidth occupied by the second data of the second STA, so that the first STA quickly determines that the first data packet of the first STA includes the channel of the second control information.
  • the first indication in the first control information may be the bandwidth BW, which is the same as the bandwidth function defined in the 802.11ax standard, the bandwidth BW in the first control information may be used to indicate the bandwidth of the total channel;
  • the bandwidth BW in the first control information is further used to indicate the one or more subchannels carrying the second control information, so that the first STA acquires the second control information on the one or more subchannels, thereby Get the complete resource indication information and parse the data field of the first data packet.
  • the subchannels carrying the second control information indicated by the first indication are different.
  • the bandwidth BW takes the first value, indicating that the total channel bandwidth is 40 MHz
  • the total bandwidth is 80 MHz, and is divided into: 20 MHz primary channel P20, 20 MHz secondary channel S20, and 40 MHz secondary channel S40, wherein the AP can select P20 transmission according to the bandwidth requirement of the second STA.
  • the second data packet of the second STA that is, the bandwidth corresponding to the second STA is 20 MHz, or the P20 and the S20 are selected to transmit the second data packet for the one or more second STAs, that is, the bandwidth allocated by the second STA.
  • the bandwidth BW takes a third value
  • the total bandwidth is indicated as 160 MHz or 80 MHz + 80 MHz, and is divided into: 20 MHz primary channel P20, 20 MHz secondary channel S20, and 40 MHz secondary channel S40, 80 MHz secondary channel S80.
  • the AP may send one or more on P20 or P20 and S20.
  • a second data packet of the second STA wherein a preamble of the data packet on S20 can be punctured, corresponding to a bandwidth of the second STA of 20 MHz or 40 MHz; and the AP selects a channel that is not occupied by the second STA.
  • the bandwidth BW takes the fifth value
  • the total bandwidth is indicated as 80 MHz, and is divided into: 20 MHz primary channel P20, 20 MHz secondary channel S20, and 40 MHz secondary channel S40, wherein one of the two 20 MHz subchannels in S40 is Puncture;
  • AP may select P20 to transmit a second data packet for one or more second STAs, corresponding to a bandwidth of 20 MHz for the second STA, and the AP may select the preamble in S20 or S20 and S40 to be unpunctured (puncture)
  • a first data packet for one or more first STAs is transmitted on a 20 MHz subchannel.
  • BW 5 in FIG. 5;
  • the AP may select P20 to send second data for one or more second STAs. Packets, corresponding to the second STA bandwidth of 20 MHz, the AP may select a first data packet for one or more first STAs on a 20 MHz subchannel in which S20 or S20 and S40 are not punctured, one of which is mixed
  • the first control information may further include a bandwidth occupied by the second data packet.
  • the first STA may be according to the first The bandwidth BW included in the control information and the bandwidth of the second data packet determine the slave channel occupied by the first data packet of the first STA.
  • the AP may also transmit the first data packet for one or more first STAs on S80, or any one or more 20 MHz subchannels in S80.
  • a first data packet (not shown in Figure 5) for one or more first STAs is transmitted.
  • FIG. 5 is merely exemplary and does not show one or more subchannel combinations indicated by all possible values of the bandwidth BW.
  • more values may be included to indicate more slave channel combination modes. For example, when the bandwidth BW is the eighth value, the total channel bandwidth is 320 MHz.
  • the combination of the indicated slave channels for transmitting the first data packet including the second control information may refer to the foregoing manner, and the embodiment is not specifically limited herein.
  • the first STA After the first STA receives the first control information, according to the first control information, it is learned that the data of the first STA is not carried on the primary channel after the first control information, and then Acquiring the second control information on the one or more subchannels indicated by the first indication according to the first indication included in the first control information. According to the first control information and the second control information, the first STA acquires complete resource allocation information for one or more first STAs, thereby parsing the data field of the first data packet.
  • the AP is instructed to send the first data packet for the first STA and the second control information on the channel 3 and the channel 4, and the second control information may include Resource scheduling information of the first part of the first STA of the one or more first STAs, the second control information is carried on the channel 4; when the first control information further includes the second part of the first part of the one or more first STAs
  • the first STA may obtain resource scheduling information for the first part of the first STA in the first control information, and obtain the second part of the second control information. The resource scheduling information of the first STA, thereby parsing the data field of the first data packet.
  • the first STA when the AP performs the multi-channel downlink hybrid transmission, especially in the case of the preamble puncturing, the first STA may be in the first control information by carrying the signaling field complying with the first standard. Acquiring the signaling information of the first data packet in the first control information, so that the first STA reads the signaling according to the receiving process in the case of non-hybrid transmission and acquires the resource scheduling information to parse the data field of the first data packet. The complexity of the first STA is reduced.
  • the AP sends first control information for one or more first STAs on at least a primary channel.
  • the first control information includes:
  • the first indication may be a channel number or a channel index of the first subchannel.
  • the first subchannel that can be indicated is the channel 4 in FIG. 2, when the first When the indication value is 10, the first subchannel that can be indicated is channel 3 in FIG. 2;
  • the second indication may also be a channel label or a channel index of the second subchannel.
  • the AP sends a first data packet for one or more first STAs on a first partial channel of the total channel, and simultaneously transmits a second for one or more second STAs on a second partial channel of the total channel.
  • Data packet for one or more first STAs on a first partial channel of the total channel, and simultaneously transmits a second for one or more second STAs on a second partial channel of the total channel.
  • the first partial channel does not overlap with the second partial channel, the first partial channel includes a first subchannel and a second subchannel, the second partial channel includes a primary channel, and the first data packet includes first resource scheduling information and a second resource scheduling Information, the first subchannel carries first resource scheduling information, and the second subchannel carries second resource scheduling information;
  • the first resource scheduling information and the second resource scheduling information include resource scheduling information for the one or more first STAs.
  • the first resource scheduling information and the second resource scheduling information are used to indicate that the one or more first STAs parse the first data packet.
  • the first STA and the second STA have different capability sets.
  • the first STA receives, by the primary channel, first control information for one or more first STAs.
  • the first STA receives the first data packet on the first part of the total channel, and the first STA acquires the first resource scheduling information on the first subchannel according to the first indication, and according to the second indication, the first STA is in the first The second resource scheduling information is obtained on the second subchannel.
  • the first STA parses the data field of the first data packet according to the first resource scheduling information and the second resource scheduling information.
  • the first resource scheduling information includes resource scheduling information for the first part of the first STA or the first STA; the second resource scheduling information may include, for the first STA or the first STA Two parts of the first STA's resource scheduling information.
  • the intersection of the first part of the first STA and the second part of the first STA may be empty or not empty; the union of the first part of the first STA and the second part of the first STA is the one or more first STAs .
  • the complete resource scheduling information for parsing the first data packet data field can be obtained.
  • the first control information 701.1 may adopt a sending method of the foregoing first control information 401.1, and details are not described herein again.
  • the first control information 701.1 includes a first indication 701.2 and a second indication 701.3, and the AP transmits the first data for the one or more first STAs on the first partial channel of the total channel (including the channels 5, 6, 7, 8) Packet 703.1, where one or more first STAs are STA1, STA2, STA3, STA4 as an example, that is, the bandwidth of all the slave channels occupied by the first data packet 703.1 is 80 MHz, where the bearers are carried on channel 5 and channel 7.
  • the physical layer preamble according to the first standard includes the first resource scheduling information 704, and the second resource scheduling information 705 is included in the physical layer preamble according to the first standard carried on the channel 6 and the channel 8, and the first resource scheduling information may be Containing resource scheduling information for STA1 and STA2, the second resource scheduling information may include resource scheduling information for STA3 and STA4. It can be understood that the first STA acquires one first resource scheduling information and one second resource scheduling information to obtain all the complete resource scheduling information.
  • the first indication 701.2 indicates one of channel 5 or channel 7
  • the second indication 701.3 indicates one of channel 6 or channel 8.
  • the first STA acquires the first resource scheduling information according to the first indication, and obtains the second resource scheduling information according to the second indication, where the first STA combines the first resource scheduling information and the second resource scheduling information to parse The data field of the first data packet.
  • a total of 2 bits may be used to indicate a first subchannel carrying the first resource scheduling information and a second subchannel carrying the second resource scheduling information, and indicating that the total channel bandwidth is 80 MHz, wherein the first indication One bit may be used to indicate the first subchannel where the first resource scheduling information is located, and the second indication may use another 1 bit to indicate the second subchannel where the second resource scheduling information is located.
  • Table 1 and Table 2 according to the channel number shown in FIG. 2, when the first indication takes a value of 1, the first subchannel is indicated as channel 3, and the channel 3 carries the first resource scheduling information. When the value is 1, the second subchannel is indicated as channel 4, and the channel 4 carries the second resource scheduling information. It should be noted that, when the first indication takes a value of 0, indicating that the channel 1 carries the first resource scheduling information, it can be understood that the data of the first STA is transmitted on the primary channel, and thus the hybrid transmission is not performed.
  • the value of the first indication Channel where the first resource scheduling information is located 1 Channel 3 0 Channel 1
  • the value of the second indication Channel where the second resource scheduling information is located 1 Channel 4 0 Channel 2
  • a total of 4 bits may be used to indicate a first subchannel carrying the first resource scheduling information and a second subchannel carrying the second resource scheduling information, and indicating that the total channel bandwidth is 160 MHz, wherein the first indication Two bits may be used to indicate a first subchannel carrying the first resource scheduling information, and the second indication may use another two bits to indicate a second subchannel carrying the second resource scheduling information, such as Table 3 and Table 4. Show. It can be understood that when the channel number of the first data packet of the first STA is transmitted is 3, 4, 5, 6, 7, 8, the first resource scheduling information can be repeatedly carried on the channels 3, 5, 7 and second. If the resource scheduling information is repeatedly carried on the channels 4, 6, and 8, the first indication value may be any one of 11, 10 or 00, and the second indication value may be any one of 11, 10, 00.
  • a total of 8 bits are used to indicate a first subchannel carrying the first resource scheduling information and a second subchannel of the second resource scheduling information, and the total channel bandwidth is 320 MHz
  • the first indication may be Three bits are used to indicate the first subchannel carrying the first resource scheduling information
  • the second indication may use the other three bits to indicate the second subchannel carrying the second resource scheduling information.
  • 80 MHz is segmented as one channel, when the first data packet of the first STA occupies multiple channel segments, since the first resource scheduling information is repeated bearer in a part of the 20 MHz channel
  • the second resource scheduling information is repeatedly carried on another part of the 20 MHz channel, so the first STA station may only need to read the first resource scheduling information and the second resource scheduling information on some segments, which may be further adopted.
  • a smaller number of bits indicates the slave channel on which the resource scheduling information to be read is located. For example, when the total channel bandwidth is 320 MHz, it is divided into four segments.
  • the first STA only needs to read one first resource scheduling information and one second resource scheduling information in the first two segments to obtain complete resource indication information. Then, in the first two segments, there are only 4 repeated first resource scheduling information and 4 repeated second resource scheduling information, so only 4 bits are needed in total to indicate the first resource scheduling information and the second resource.
  • the slave channel on which the scheduling information is located thereby reducing overhead.
  • the structure of the first resource scheduling information and the second resource scheduling information may be similar to the content channel CC (Content Channel, CC for short) in the 802.11ax, where the first resource scheduling information may be the first content channel, and the second The resource scheduling information may be a second content channel.
  • the content channel CC (CC) may be composed of a common block field (Common Blokc Filed) and a user specific field (User Specific Field).
  • the common block field is mainly used to indicate the allocation of the resource unit, and includes a Resource Unit Allocation subfield, where the resource allocation field can be used to indicate the allocation of resource units in the frequency domain and the number of STAs scheduled in each resource unit.
  • the station-by-site field in the user-specific field may include a station identifier (generally the STA's association identifier AID) scheduled on the corresponding resource unit, a single user's number of spatial streams, and a beamforming transmission indication. (Transmit Beamforming), modulation and coding scheme, dual coding modulation (DCM) and other information.
  • the 20 MHz physical layer protocol data unit PPDU includes a content channel CC, the resource allocation field of the content channel CC is 8 bits, indicating resource allocation information of the 20 MHz channel, and the 40 MHz PPDU includes two different content channels CC, which are recorded as the first content channel CC1.
  • the second content channel CC2 wherein the resource allocation field of CC1 is 8 bits, 8 bits is used to indicate resource allocation information of channel 1, the resource allocation field of CC2 is 8 bits, used to indicate resource allocation information of channel 2; and the 80 MHz PPDU includes 2 Repeated CC1 and 2 repeated CC2, where CC1 is repeated on channel 1 and channel 3, and resource allocation field of CC1 is 16 bits, where 8 bits is used to indicate resource allocation information of channel 1, and 8 bits is used for 8 bits. Indicates the resource allocation information of channel 3, CC2 is repeated on channel 2 and channel 4, and the resource allocation field of CC2 is 16 bits, wherein 8 bits is used to indicate resource allocation information of channel 2, and 8 bits is used to indicate resource of channel 4. Allocation information; 160 MHz ZPDU contains 4 repeated CC1 and 4 repeated CC2, similar to 80 MHz PPDU.
  • the physical layer protocol data unit when the physical layer protocol data unit includes more than two content channel categories, similarly, the subchannels carrying the different types of content channels may be respectively indicated.
  • the total channel bandwidth is 320 MHz
  • a total of 8 bits may be used to indicate the slave channel in which the CCs of the 4 classes are located, where the first indication may use the first two bits to indicate the first subchannel carrying the CC1, and the second indication may adopt the second two.
  • the bit indicates the second sub-channel carrying the CC2, and adds a third indication in the first control information, the third two-bit indication is used to indicate the third sub-channel carrying the CC3, the fourth indication is added, and the fourth two-bit indication bearer is adopted.
  • the fourth subchannel of CC4 may be used to indicate the slave channel in which the CCs of the 4 classes are located, where the first indication may use the first two bits to indicate the first subchannel carrying the CC1, and the second indication may adopt the second two.
  • the bit indicates the second sub-channel carrying the CC2, and adds a third indication in the first control information, the third two-bit indication is used to indicate the third sub-channel carrying the CC3, the fourth indication is added, and the fourth two-bit indication bearer is adopted.
  • the value of the foregoing first indication, the second indication, the third indication, or the fourth indication may be changed from the indicated slave channel, and is not limited to the examples enumerated in this embodiment.
  • the first STA may obtain the first resource scheduling information on the first subchannel indicated by the first indication according to the first indication and the second indication, and And acquiring the second resource scheduling information on the indicated second subchannel, and combining the first resource scheduling information and the second resource scheduling information, the first STA parses the data field of the first data packet.
  • this embodiment only indicates a subchannel just enough to obtain complete resource scheduling information, which is used for indicating fewer bits, reduces overhead, and does not require the first STA to read on each slave channel.
  • the repeated resource scheduling information is used to improve the efficiency of the first STA to read the resource scheduling information.
  • the AP transmits first control information for one or more first STAs on at least the primary channel;
  • the first control information includes: an identifier for indicating a slave channel, where the slave channel is used to carry data of the first STA;
  • the AP may send data for one or more first STAs on a fixed slave channel.
  • a slave channel identifier when used to indicate that a slave channel identifier has a value of 00, the AP may be instructed to transmit data of the first STA on a 20 MHz slave channel (eg, channel 2 in FIG. 2), and the total channel bandwidth is 40 MHz;
  • the AP may be instructed to transmit the first data of the first STA on the 40 MHz slave channel (eg, channel 3 and channel 4 in FIG.
  • the AP may be instructed to transmit data of the first STA on the 80 MHz slave channel (eg, channels 5, 6, 7, 8 in FIG. 2), and the total channel bandwidth is 160 MHz;
  • the AP may be instructed to transmit data of the first STA from the channel at 160 MHz. It can be understood that the specific slave channel corresponding to the value indicated by the channel identifier is replaceable.
  • the first STA After receiving the first control information, the first STA determines, according to the first control information, a slave channel carrying the first data packet of the first STA, and receives the first STA first data packet on the slave channel.
  • FIG. 8 is a schematic flowchart diagram of still another data transmission method according to the embodiment.
  • the access point AP sends a first data packet for one or more first STAs on a first partial channel of the total channel, and simultaneously transmits a second partial channel on the total channel except the first partial channel. Or a second data packet of the plurality of second STAs;
  • the second data packet includes two adjacent signaling fields, and the four subcarriers in the two adjacent signaling field symbols are carried on the fourth subchannel for indicating the first partial channel to the first STA. Information.
  • the information for indicating the first part of the channel is specifically: carrying the first value set on the four subcarriers in the first signaling field symbol of the two adjacent signaling fields, and the two adjacent letters Having the second set of values on the four subcarriers in the second signaling field symbol of the field, so that the first STA determines the first part of the channel according to the first set of values and the second set of values;
  • the subcarrier index of the four subcarriers is [-28, -27, 27, 28];
  • At most one of the first set of values and the second set of values is [-1, -1, -1, 1], and the first set of values is different from the second set of values.
  • the second portion of the channel includes a primary channel and the first portion of the channel includes one or more secondary channels.
  • the first STA has a different capability set than the second STA.
  • the first STA receives the second data packet on the second partial channel, where the second data packet includes two adjacent signaling fields, and four of the adjacent two signaling field symbols Carrying, on the carrier, information for indicating the first part of the channel to the first STA;
  • the first STA determines the first partial channel according to four subcarriers in the adjacent two signaling field symbols of the second data packet.
  • the determining, by the first STA, the first partial channel includes: the first STA performing channel estimation on four subcarriers in the first signaling field symbol, and, according to the channel estimation, the Decoding, by the STA, the four subcarriers in the second signaling field symbol to obtain a third set of values, determining whether the third set of values is equal to the second set of values; or
  • the first STA determines a second portion of the second data packet The bandwidth of the channel and determine the first portion of the channel.
  • the second data packet includes a physical layer preamble complying with the second standard, and the physical layer preamble according to the second standard includes a legacy preamble (L-Preamble), wherein the legacy preamble includes a legacy short training field (Legacy Short Training Field) , L-STF), Legacy Long Training Field (L-LTF), and Legacy Signal Field (L-SIG).
  • L-Preamble legacy preamble
  • L-STF legacy short training field
  • L-LTF Legacy Long Training Field
  • L-SIG Legacy Signal Field
  • the physical layer preamble following the second standard further includes Very High Throughput Signal A1 (Very High Throughput Signal, VHT-SIG A1) and Very High Throughput Signaling Field A2 (Very High Throughput Signal (VHT-SIG A2), very high short training sequence and very high long training sequence;
  • VHT-SIG A1 Very High Throughput Signal
  • VHT-SIG A2 Very High Throughput Signal (Very High Throughput Signal (VHT-SIG A2)
  • VHT-SIG A2 Very High Throughput Signal
  • the physical layer preamble following the second standard also contains high throughput signaling field 1 (High Throughput Signal (HT-SIG 1) and High Throughput Signal Field 2 (HT-SIG 2), high throughput short training sequence and high throughput long training sequence.
  • information may be carried in 4 subcarriers within the L-SIG and two signaling field symbols adjacent to the L-SIG.
  • information can be carried on 4 subcarriers within L-SIG and RL-SIG symbols, and information can also be carried on 4 subcarriers within L-SIG and VHT-SIG A1 symbols, and also in L-SIG and HT.
  • the information is carried on the four subcarriers in the -SIG 1 symbol, which is not specifically limited in this embodiment.
  • the multi-channel hybrid transmission is performed by the AP to the first STA and the second STA following the 802.11ac standard protocol as an example.
  • the AP transmits a second data packet 902 for one or more second STAs that conform to the 802.11ac standard protocol on the second partial channel, and transmits the first one or more first STAs that comply with the first standard on the first partial channel A data packet 901.
  • the value of the four subcarriers transmitted in the L-SIG 902.1 symbol is different from the value transmitted by the four subcarriers in the VHT-SIG A1 902.2 symbol, and at most one is [-1] , -1, -1, 1], may be used to indicate to the first STA that the data of the second data packet does not carry one or more first STAs, and the information is hidden from the second STA, that is, the second STA can receive normally
  • the L-SIG and the L-SIG are in close proximity to the signaling field, but the L-SIG and L-SIG neighboring signaling fields are not changed, and their data can be parsed normally.
  • the L-SIG field is adjacent to the L-SIG.
  • the value of the four subcarriers in the subcarrier index [-28, -27, 27, 28] of the field symbol is [-1, -1, -1, 1], so it can be in the L-SIG.
  • the first STA can be quickly identified by not transmitting [-1, -1, -1, 1] on the four subcarriers in at least one of the symbols of the adjacent field after the L-SIG.
  • the data packet is not a data packet that conforms to the 802.11ax standard protocol, nor is it a data packet that follows the 802.11ax standard protocol such as 802.11a and 802.11n.
  • information may be carried only on the L-SIG on the primary channel (the second partial channel) and the four subcarriers in the field symbols adjacent to the L-SIG, indicating to the first STA that there is no bearer on the primary channel
  • the data packet of the first STA is such that the first STA receives the first data packet on the first partial channel other than the primary channel.
  • the subcarrier index in the L-SIG 902.1 and VHT-SIG A1 902.2 symbols respectively is [-28, -27, 27, 28].
  • the carrier carries information.
  • the first set of values [-1, -1, -1, 1] is transmitted on subcarriers with subcarrier indices [-28, -27, 27, 28] within the L-SIG 902.1 symbol, at VHT-SIG A1.
  • the second value set [1, 1, 1, -1] is transmitted on the subcarriers with the subcarrier index of [28, -27, 27, 28] in the 902.2 symbol, and the first STA reads the main channel in the mixed data packet.
  • the channel estimation is performed on the subcarriers [-28, -27, 27, 28] in the L-SIG 902.1, and the subcarriers in the VHT-SIG A1 902.2 [-28] , -27, 27, 28] demodulate to obtain a third set of values, and compare whether the third set of values is the second set of values [1, 1, 1, -1] to determine whether it is a mixed data transmission;
  • L-SIG 902.1 and VHT-SIG A1 902.2 subcarriers [-28, -27, 27, 28] carry information to calculate differential results, if L-SIG and VHT-SIG A1 subcarriers [-28, -27, 27, 28]
  • the difference between the values transmitted on the value is 0 or less than (or less than or equal to) a predetermined threshold value, or the third set of values is not equal to the second set of values, then it is determined that no mixed transmission is performed; if the difference
  • the primary channel and the L-SIG of the at least one secondary channel adjacent to the primary channel (the second partial channel) and the 4 subcarriers in the adjacent signaling field after the L-SIG The information indicates to the first STA that the hybrid data packet is being transmitted, and indicates that the data packet of the first STA is not carried on the primary channel and the at least one secondary channel (second partial channel) immediately adjacent to the primary channel.
  • the subcarriers can be carried on the subcarrier index [-28, -27, 27, 28] subcarriers in the signaling fields immediately adjacent to the L-SIG and the L-SIG, and the specific method is similar to that described in the previous paragraph. No longer.
  • the first STA After the first STA receives the hybrid data packet, the first STA determines the primary channel and the L-SIG on the adjacent channel (the second partial channel) and the adjacent signaling after the L-SIG.
  • the information carried by the four subcarriers of the field symbol can be used to learn the bandwidth of the second STA data packet, and the data of the first STA is not carried on the second part of the channel, so the first STA is in addition to the foregoing.
  • the first data packet is received on a first portion of the channel other than the second portion of the channel.
  • FIG. 10 is a schematic diagram showing another example of a data transmission method according to the embodiment. The solution of this embodiment will be further described below with reference to FIG. 10 and FIG.
  • the access point AP generates a scheduling frame, where the scheduling frame includes first trigger information for one or more first STAs, and second trigger information for one or more second STAs.
  • the trigger information is used to schedule the one or more first STAs to perform uplink data transmission on the first part of the channel
  • the second trigger information is used to schedule the one or more second STAs to perform on the second part of the channel.
  • the first partial channel does not overlap with the second partial channel.
  • the access point AP sends the scheduling frame.
  • the scheduling frame is also a MAC frame. It can be sent by the AP at least on the primary channel.
  • the first STA that follows the first standard receives the scheduling frame, and acquires the first trigger information.
  • the first STA sends data to the AP on the first part of the channel; and, at the same time, the second STA sends data to the AP on the second part of the channel.
  • the first partial channel does not overlap with the second partial channel, and may include the primary channel in the first channel or the primary channel in the second channel.
  • the first STA and the second STA After the first STA and the second STA receive the foregoing scheduling frame sent by the AP, the first STA acquires the first trigger information of the first STA, the second STA acquires the second trigger information of the second STA, and the first STA adopts the PPDU. Transmission is performed on one or more 20 MHz channels indicated by the trigger information, and the second STA adopts a HE TB PPDU (High Efficiency Trigger based PPDU, referred to as HE TB PPDU) at another one or more 20 MHz indicated by the second trigger information. Transmission on the channel.
  • HE TB PPDU High Efficiency Trigger based PPDU
  • the AP may also feed back the multi-user block acknowledgement (M-BA) to the at least one first STA and the at least one second STA (multiple-user block acknowledgement, Referred to as M-BA).
  • M-BA multi-user block acknowledgement
  • the scheduling frame may be an aggregated frame, that is, an Aggregated MAC Protocol Data Unit (A-MPDU), for example, as shown in FIG. 11, one subframe of the aggregated frame A-MPDU.
  • A-MPDU Aggregated MAC Protocol Data Unit
  • the second trigger frame includes the second trigger information
  • the first trigger of the first STA is carried in another subframe of the aggregate frame A-MPDU.
  • the first trigger frame includes first trigger information, that is, a trigger frame that follows the first standard.
  • the physical layer preamble (PHY Preamble) of the aggregated frame follows the standard protocol before 802.11ax or 802.11ax, so that the legacy station can normally receive the aggregated frame and parse its own trigger frame.
  • the second trigger frame 1101.2 is configured to schedule one or more sites that follow the 802.11ax protocol to perform uplink transmission by using a High Efficiency Trigger based PPDU (HE TB PPDU), and the first trigger frame 1101.1 is used to schedule one or more The first STA uses a multi-user PPDU for uplink transmission.
  • HE TB PPDU High Efficiency Trigger based PPDU
  • the second STA in this embodiment specifically refers to a STA that complies with the 802.11ax standard protocol, and is also referred to as a HE STA (High Efficiency Station, referred to as HE STA), because the standard protocol before 802.11ax does not support the trigger frame.
  • HE STA High Efficiency Station
  • the frame structure of the first trigger frame 1101.1 following the first criterion may be as shown in FIG.
  • the first trigger frame 1101.1 includes a public domain and a site-by-site domain, and the site-by-site domain may include one or more user information fields of the first STA.
  • the public domain may include the same or similar field as the 802.11ax function, and may also include a trigger type extension field 1202 (trigger type extension), and the trigger frame type extension field 1202 is used to indicate a trigger frame that follows the next generation or next generation standard.
  • the type may also include a semi-orthogonal multiplexing access (SOMA) 1203 for indicating a multiple access mode that the first STA can adopt.
  • SOMA semi-orthogonal multiplexing access
  • each user information field (user info field) of the site-by-site domain may further include semi-orthogonal multiple access indication information 1204 and a time block indication (Time Segment) 1205, wherein the time block indication information is used for Indicates the time block in which the site is located.
  • the first STA site may support full-duplex transmission, and support larger transmission bandwidth, more spatial streams, etc., and thus may need to be more Multiple bits to carry the above information.
  • the first trigger frame of the first STA may adopt a frame structure similar to the second trigger frame, or may adopt a different frame structure, and the solution is not specifically limited.
  • the scheduling frame may also be a third trigger frame that conforms to the 802.11ax standard protocol, and the third trigger frame may be escaping indication by using a trigger frame of the 802.11ax standard protocol, Simultaneously scheduling one or more second STAs that follow 802.11ax and one or more first STAs that follow the first standard;
  • the third trigger frame includes: a first user information field carrying the first trigger information, and a second user information field carrying the second trigger information, where the first user information field includes a second STA for avoiding Misreading information.
  • a possible frame structure of the third trigger frame is as shown in FIG. 13, and the third trigger frame may be indicated as an extended trigger to the first STA by using a reserved bit of the common part, such as HE SIG-A Reserved 1301 or Reserved 1302.
  • the user information field 1304 of one or more 802.11ax sites may be included, as well as the user information field 1303 of one or more first STAs.
  • the user information field 1303 of the first STA may be composed of user information fields 1305 and 1306 of two 802.11ax sites, and may be twice as long as the length of the user information field of the 802.11ax site.
  • the user information field 1303 of the first STA may include the association identifier AID 1305.1 of the first STA, the resource indication information 1305.2, the modulation and coding scheme MCS 1305.3, and the like, and the information similar to the function of the 802.11ax user information field, and may also include other information. For example, a larger number of streams indicates semi-orthogonal multiple access SOMA indication information, time reuse indication information (Time reuse), and the like.
  • the second user information field 1306 of the two user information fields included in the user information field 1303 of the first STA carries indication information for avoiding misreading of the 802.11ax site.
  • the most important bit of the associated identifier AID in the second user information field 1306 can be set to 1, and when the 802.11ax site reads the AID, the value is greater than 2047, so The information field is misinterpreted as its own information field; in another optional manner, the resource unit allocation field RU Allocation in the second user information field may be set to a reserved value or the modulation and coding scheme MCS is set to pre Leave value.
  • the 802.11ax site reads the reserved value, the meaning of the reserved value cannot be understood, so it will not be misinterpreted as its own information field.
  • the user information field of the second STA may be used to represent the user information field of the first STA.
  • the user information field in which two user information fields are combined into one first STA is only an example. It does not constitute a limitation.
  • one or more first STAs and one or more second STAs may be simultaneously scheduled for uplink.
  • Hybrid transmission makes full use of channel bandwidth and improves transmission efficiency.
  • this embodiment considers a transmission method for improving bandwidth utilization by multi-channel transmission when an AP or STA has a flexible duplex mode.
  • the AP with the flexible duplex mode receives the data packet sent by the one or more second STA stations on the primary channel, the AP monitors other channels, and when the slave channel is idle, while receiving the data packet of the second STA
  • the AP may send a trigger frame complying with the first standard on the primary channel or the non-repeating 80 MHz channel to trigger one or more first STAs to perform uplink multi-user data transmission on other secondary channels.
  • the full-duplex transmission ends the original bandwidth can be returned.
  • the AP sends a Multi-User Block Acknowledge (M-BA) frame to one or more first STAs.
  • M-BA Multi-User Block Acknowledge
  • FIG. 14 shows an example of a full-duplex uplink hybrid transmission.
  • the AP receives one or more PPDUs 1401 sent by the second STA on the primary channel.
  • the trigger frame 1402 may be sent to the one or more first STAs on the primary channel, and the AP receives the PPDU 1403 that carries one or more first STA data on the S40. Further, the AP may also send the information to the one or more second STAs.
  • the conventional acknowledgement information ACK 1404 is fed back, and the AP feeds back the multi-user block confirmation M-BA 1405 to the one or more first STAs.
  • the AP with full duplex mode when the AP with full duplex mode receives one or more second STAs to send data packets on the primary channel, the AP monitors other channels, for example, when the slave channel is idle, and at the same time, the AP Downlink data may be sent to one or more first STAs on the primary channel and on other idle secondary channels.
  • M-BAR Multi-User Block Acknowledge Request
  • FIG. 15 shows an example of a full-duplex uplink-downlink hybrid transmission.
  • the AP receives one or the PPDU 1501 sent by the second STA on the primary channel.
  • the AP may send the PPDU 1502 to the one or more first STAs on the primary channel and on S20 and S40. Further, the AP feeds back the traditional acknowledgement information ACK 1503 to the second STA, and the AP sends the first acknowledgement information to the one or more first STAs. M-BAR 1504.
  • the AP may use the scheduled uplink hybrid transmission or the downlink hybrid transmission, thereby fully utilizing the channel, improving spectrum utilization and transmission efficiency.
  • This embodiment provides a method for automatic detection.
  • a PPDU conforming to the first standard includes a conventional short training field L-STF, and a conventional long training field L-LTF, and a conventional signaling field L-SIG.
  • L-SIG1601 two signature symbols 1602 and 1603 may be included, wherein the first one of the two signature symbols is a binary phase keying modulation (Binary Phase Shift Keying, BPSK) modulation, wherein the first signature symbol 1602 includes a predetermined Signature field 1603.1 for identifying the data packet as a PPDU that follows the first criterion.
  • the predetermined signature field includes transmitting and receiving two pieces of known information bits.
  • the data packet is determined to be a PPDU complying with the first standard.
  • the signature symbols 1602 and 1603 may further include a basic service set color BSS color 1603.2, a cyclic redundancy code (CRC), and a binary convolution code (BCC) code tail (tail). ) Other fields such as bits.
  • the two signature fields are the same signature field, or the two signature symbols are the same signature symbol, used to increase the robustness of the transmission, and used to enhance the reliability of identifying the PPDU complying with the first standard.
  • L-SIG and RL-SIG similar to 802.11ax are also carried on the four subcarriers of the L-SIG and the first subcarrier index of the signature symbol [-28, -27, 27, 28].
  • a pilot sequence for channel estimation is 4 subcarriers of [-28, -27, 27, 28], which can be used to transmit information or as a pilot sequence for channel estimation.
  • FIG. 17 is a diagram showing an example of a frame structure of a PPDU according to the first standard according to an embodiment of the present disclosure.
  • the length of the L-SIG field may be length 1701 and/or
  • the parity bit parity bit 1702 is scrambled to the cyclic redundancy code CRC of the signaling symbol behind the L-SIG, that is, the length length 1701 and/or the parity bit parity bit 1702 in the L-SIG field are identical.
  • the CRC of the field is scrambled, and the scrambled result is placed in the length scrambled CRC field of FIG.
  • the length length 1701 and/or the parity bit parity bit 1702 in the L-SIG field may be XORed to the cyclic redundancy code CRC of the signaling symbol behind the L-SIG, that is, the L-SIG
  • the length length 1701 and/or the parity bit parity bit 1702 in the field are XORed with the CRC of the signaling field, and the result of the exclusive OR is placed in the length XOR CRC field of FIG.
  • FIG. 18 is a schematic structural diagram of a data transmitting apparatus 1800 in the foregoing embodiment.
  • the apparatus 1800 may be configured as an AP 103 in the foregoing WLAN communication system 100.
  • the apparatus 1800 may include: a processor 1802, and a computer readable Storage medium/memory 1803, transceiver 1804, input device 1805 and output device 1806, and bus 1801.
  • a processor, a transceiver, a computer readable storage medium, and the like are connected through a bus.
  • the embodiments of the present application do not limit the specific connecting medium between the above components.
  • the transceiver 1804 is configured to support communication between the AP and the one or more first STAs in the foregoing embodiment, and further support communication between the AP and the one or more second STAs in the foregoing embodiment.
  • the transceiving process involving the AP in Figures 3 through 15 and/or other processes for the techniques described herein may be performed.
  • the transceiver 1804 can be configured to transmit first control information for one or more first STAs on at least a primary channel, and the first control information includes a first indication, and the transceiver 1804 can also be used for the first channel Transmitting a first data packet for one or more first STAs on a portion of the channel, wherein the first data packet includes second control information, and is further operative to transmit on the second portion of the total channel for one or a second data packet of the plurality of second STAs.
  • the transceiver 1804 is further configured to receive uplink data that is sent by the one or more first STAs on the first part of the channel of the total channel based on the first trigger information, and may further be configured to receive, by the one or more second STAs, the second trigger information. Uplink data transmitted on the second part of the channel of the total channel.
  • transceiver 1804 can also be used to perform other processes and methods of the techniques described herein.
  • the processor 1802 is configured to perform control management on the action of the foregoing AP, and is used to perform processing performed by the AP in the foregoing embodiment, and may perform the processing procedure involving the AP in FIG. 3 to FIG. 15 and/or used in the description of the present application.
  • Other processes of the technology may be responsible for managing the bus and executing programs or instructions stored in memory.
  • the processor 1802 can be configured to generate first control information including the first indication.
  • a program, instruction or data for carrying out the technical solution of the present application is stored in the computer readable storage medium/memory 1803.
  • computer readable storage medium/memory 1803 can include instructions sufficient to allow device 1800 to transmit first control information to one or more first STAs, and can also include sufficient channels to allow device 1800 to transmit the first control information
  • the instructions for transmitting the first data packet for the one or more first STAs on the first portion of the channel may further comprise a second enough to allow the apparatus 1800 to transmit one or more second STAs on the second partial channel of the total channel
  • the instruction for data grouping is stored in the computer readable storage medium/memory 1803.
  • computer readable storage medium/memory 1803 can include instructions sufficient to allow device 1800 to transmit first control information to one or more first STAs, and can also include sufficient channels to allow device 1800 to transmit the first control information
  • the instructions for transmitting the first data packet for the one or more first STAs on the first portion of the channel may further comprise a second enough to allow the apparatus 1800 to transmit
  • FIG. 18 only shows a simplified design of the AP.
  • the AP can include any number of transceivers, processors, memories, etc., and all APs that can implement the present invention are in the present invention. Within the scope of protection.
  • FIG. 19 is a schematic diagram showing the possible structure of a data transmitting apparatus 1900 in the foregoing embodiment.
  • the apparatus 1900 may be configured as a first STA 101 in the foregoing WLAN communication system 100.
  • the apparatus 1900 includes: a processor 1902, and a computer readable Storage medium/memory 1903, transceiver 1904, input device 1905 and output device 1906, and bus 1901.
  • a processor, a transceiver, a computer readable storage medium, and the like are connected through a bus.
  • the embodiments of the present application do not limit the specific connecting medium between the above components.
  • the transceiver 1904 can be configured to support communication between the first STA and the AP described above, and can perform the communication or interaction process involving the first STA in FIGS. 3 through 15 and/or other processes for the techniques described herein.
  • the transceiver 1904 may be configured to receive the first control information that is sent by the AP at least on the primary channel and includes the first indication, and may also be used to receive the first part of the total channel after the first control information.
  • a data packet; the transceiver 1904 is further configured to: after acquiring the first trigger information, send the uplink data to the AP by using the resource unit indicated by the first trigger information on the first part of the channel of the total channel.
  • the processor 1902 is configured to perform control management on the action of the first STA, to perform processing performed by the first STA in the foregoing embodiment, and may perform the processing related to the first STA in FIG. 3 to FIG. 15 and/or Other processes of the techniques described herein may be responsible for managing the bus and executing programs or instructions stored in the memory.
  • the processor 1902 may be configured to combine the first control information and the second control information to acquire resource scheduling information and a data field of the first data packet.
  • computer readable storage medium/memory 1903 can include instructions sufficient to allow device 1900 to receive first control information including a first indication by at least a primary channel by said AP, and can also include sufficient to allow device 1900 to receive a first control
  • the instruction to receive the first data packet on the first partial channel of the total channel may further comprise sufficient to allow the apparatus 1900 to obtain the second control information on the one or more subchannels indicated by the first indication according to the first control information.
  • the instructions may also include instructions sufficient to allow the device 1900 to obtain resource scheduling information based on the first control information and the second control information.
  • FIG. 19 only shows a simplified design of the first STA.
  • the first STA can include any number of transceivers, processors, memories, etc., and all can implement the first aspect of the present invention. STAs are all within the scope of the present invention.
  • the processor involved in the foregoing apparatus 1800 and the apparatus 1900 may be a general-purpose processor, such as a general-purpose central processing unit (CPU), a network processor (NP Processor, NP), a microprocessor, etc., or may be an application-specific integrated circuit ( Application-specific integrated circBIt (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application. It can also be a Digital Signal Processor (DSP), a Field-Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component.
  • DSP Digital Signal Processor
  • FPGA Field-Programmable Gate Array
  • the controller/processor may also be a combination of computing functions, such as one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the processor typically performs logical and arithmetic operations based on program instructions stored in the memory.
  • the computer readable storage medium/memory 1803 and computer readable storage medium/memory 1903 referred to above may also hold an operating system and other applications.
  • the program can include program code, the program code including computer operating instructions.
  • the above memory may be a read-only memory (ROM), other types of static storage devices that can store static information and instructions, a random access memory (RAM), and a storable memory. Other types of dynamic storage devices, disk storage, and the like for information and instructions.
  • the memory 1803 may be a combination of the above storage types.
  • the computer readable storage medium/memory described above may be distributed in the processor, external to the processor, or on multiple entities including the processor or processing circuitry.
  • the computer readable storage medium/memory described above may be embodied in a computer program product.
  • a computer program product can include a computer readable medium in a packaging material.
  • device 1800 and device 1900 can also be configured as a general purpose processing system, such as generally referred to as a chip, the general purpose processing system comprising: one or more microprocessors providing processor functionality; and an external portion providing at least a portion of the storage medium Memory, all of which are connected to other supporting circuits through an external bus architecture.
  • a general purpose processing system such as generally referred to as a chip, the general purpose processing system comprising: one or more microprocessors providing processor functionality; and an external portion providing at least a portion of the storage medium Memory, all of which are connected to other supporting circuits through an external bus architecture.
  • the steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions.
  • the software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the user equipment.
  • the processor and the storage medium may also reside as discrete components in the user equipment.
  • the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本申请涉及无线通信领域，尤其涉及一种多信道混合传输技术。在一种数据传输方法中，接入点AP向一个或多个第一STA发送包含用于指示一个或多个子信道的第一指示的第一控制信息之后，在包含主信道的第二部分信道上发送针对第二STA的第二数据分组；以及，同时在包含所述一个或多个子信道的第一部分信道上发送针对第一STA的第一数据分组，第一指示所指的一个或多个子信道上承载第二控制信息，且第一控制信息和/或第二控制信息包含针对一个或多个第一STA的资源调度信息；进一步的，第一STA根据接收到的第一控制信息和第二控制信息，获取针对第一STA的资源调度信息，并解析第一数据分组的数据字段。

Description

无线局域网中多信道混合传输方法和装置
本申请要求于2017年12月29日提交中国国家知识产权局、申请号为201711487258.9、申请名称为“无线局域网中多信道混合传输方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信领域，特别是涉及无线通信系统中的多信道混合传输方法和装置。
背景技术
随着无线局域网(Wireless Local Access Network，简称WLAN)通信标准从802.11a，802.11g历经802.11n，802.11ac，802.11ax等演进和发展，其允许传输的带宽和空时流数也逐渐发生变化，802.11a或802.11g标准允许传输的带宽为20MHz，802.11n标准允许传输的带宽为20MHz或40MHz，目前的802.11ax允许传输的带宽为20MHz，40MHz，80MHz或160MHz，WLAN系统通过使用更大的带宽以期望获取更高的传输速率。
在WLAN标准中的信道通常分为主信道和从信道，当接入点(Access Point,简称AP)或站点(Station，简称STA)接入信道时，首先会监听主信道，当主信道空闲时，进一步监听从信道是否空闲，而当监听到主信道被占用时，即使其他从信道空闲，也无法在空闲的从信道上进行数据传输，因此信道利用率较低。例如，信道带宽为160MHz，包含一个主信道，和多个从信道，当遵循802.11a或802.11g或802.11n等标准协议的站点，在主信道或包含主信道的部分信道上进行数据传输时，其他站点或接入点监听到主信道繁忙，即使其他从信道空闲，也无法进行数据传输。
因此在WLAN系统中，尤其是当信道包含主信道和一个或多个从信道，即多信道的情况下，提升信道的利用率和传输效率具有重要意义。目前提出的多信道混合传输技术，即一类站点可以占据主信道以及一个或多个从信道进行数据传输，另一类站点可占据其他的一个或多个从信道同时进行数据传输，提升了信道利用率，但灵活性不足。
发明内容
为了解决上述问题，本申请提供一种数据传输方法和装置，应用于无线通信系统。
第一方面，本申请实施例提供了一种接入点侧数据传输方法，包括：接入点AP至少在主信道上发送针对一个或多个第一站点STA的第一控制信息；其中，第一控制信息包括：第一指示，用于指示一个或多个子信道；接入点AP在总信道的第一部分信道上发送针对一个或多个第一STA的第一数据分组，其中，第一数据分组中在第一指示所指示的一个或者多个从信道上包含第二控制信息；同时，AP在总信道的第二部分信道上发送针对一个或者多个第二站点的第二数据分组；其中，第一控制信息和/或第二控制信息中包含针对一个或多个第一STA的资源调度信息，第一STA与第二STA具有不同的能力集。通过本申请实施例提供的方案， AP和STA可支持更加灵活的多信道混合传输，并降低第一STA读取资源调度信息的复杂度。
在一个可能的设计中，第一STA可以遵循第一标准，第二STA可以遵循第二标准，第一标准可以后向兼容第二标准。
在一个可能的设计中，第一控制信息可以包含针对所述一个或多个第一STA的资源调度信息，第二控制信息也可以包含针对所述一个或多个第一STA的资源调度信息。从而提升了系统的鲁棒性。
在一个可能的设计中，第一控制信息不包含针对所述一个或多个第一STA的资源调度信息，第二控制信息包含针对所述一个或多个第一STA的资源调度信息，从而可以减少第一控制信息的开销。
在一个可能的设计中，第一控制信息可包含所述一个或多个第一STA中的第一部分第一STA的资源调度信息，第二控制信息可包含针对所述一个或多个第一STA中的第二部分第一STA的资源调度信息，从而可以将针对一个或多个第一STA的资源调度信息分配在两个控制信息中，平衡两者的开销。
在一个可能的设计中，第一控制信息还可以包含第二指示，用于指示在第一控制信息后的主信道上没有承载针对一个或多个第一STA的数据，便于第一STA在接收到第一控制信息后，确定主信道上没有承载针对一个或多个第一STA的数据。
在一个可能的设计中，第一指示可以为一个或多个子信道的索引，当所述一个或多个子信道为两个子信道时，第一指示包含：两个子信道中的第一个子信道的子信道索引，和，两个子信道中的第二个子信道的子信道索引。第一STA可根据第一指示，快速获取读取资源调度信息的信道，且仅仅只需读取第一指示所指的子信道上的资源调度信息即可获取针对第一部分信道的完整的资源调度信息，提升了第一STA读取资源调度信息的效率。
在一个可能的设计中，第一控制信息可以包含公共信息部分和资源调度信息部分，其中，第一指示可以为公共信息部分包含的带宽BW。
在一个可能的设计中，第一数据分组的数据字段包含第一触发信息，第二数据分组的数据字段包含第二触发信息，其中，第一触发信息用于触发一个或多个第一STA在第一部分信道上进行上行数据传输；第二触发信息用于触发一个或多个第二STA在第二部分信道上进行上行数据传输。通过在混合数据分组的数据字段部分携带触发信息，可以实现同时触发具有不同能力集的第一STA和第二STA进行上行数据传输，提升了信道利用率。
第二方面，本申请实施例提供了又一种接入点侧数据传输方法，所述方法包括：接入点AP在总信道的第一部分信道上发送针对一个或多个第一站点STA的第一数据分组，并同时在总信道上除第一部分信道外的第二部分信道上发送针对一个或多个第二站点STA的第二数据分组；其中，第二数据分组包含相邻的两个信令字段，相邻的两个信令字段符号内的4个子载波上携带用于向第一STA指示第一部分信道的信息。通过在第二数据分组相邻的两个信令字段符号内的4个子载波上携带信息以向第一STA指示混合数据分组正在发送，而不需要提前发送控制信息，以减少开销，提升了混合传输的效率，且不影响第二STA解析自身数据。
在一种可能的设计中，指示第一部分信道的信息，具体为：在相邻的两个信令字段的第一个信令字段符号内的4个子载波上携带第一数值集，在相邻的两个信令字段的第二个信令字段符号内的4个子载波上携带第二数值集，以使第一STA根据第一数值集与第二数值集确定所述第一部分信道；
在一种可能的设计中，所述4个子载波的子载波索引为[-28,-27,27,28]；
在一种可能的设计中，第一数值集与第二数值集中至多有一个是[-1,-1,-1,1]，且第一数值集与第二数值集不同。第二部分信道至少包含主信道，第一部分信道包括一个或多个从信道。
第三方面，本申请实施例提供了一种站点侧数据传输方法，包括：第一STA在包含主信道的第二部分信道上接收第二数据分组，其中，所述第二数据分组包含相邻的两个信令字段，所述相邻的两个信令字段符号内的4个子载波上携带用于向所述第一STA指示所述第一部分信道的信息；所述第一STA根据所述第二数据分组的所述相邻的两个信令字段符号内的4个子载波确定所述第一部分信道，在所述第一部分信道上接收所述第一数据分组。通过在第二数据分组相邻的两个信令字段符号内的4个子载波上携带信息以向第一STA指示混合数据分组正在发送，而不需要提前发送控制信息，以减少开销，提升了混合传输的效率，且不影响第二STA解析自身数据。
在一种可能的设计中，第一STA确定所述第一部分信道包括：第一STA对所述第一信令字段符号内的4个子载波进行信道估计，以及，根据所述信道估计，所述第一STA对所述第二信令字段符号内的4个子载波解调得到第三数值集，判断所述第三数值集是否等于所述第二数值集；或者，所述第一STA计算所述第一信令字段符号内的4个子载波传输的第一数值集，与，所述第二信令字段符号内的4个子载波传输的第二数值集的差分结果，判断所述差分结果是否不为0或大于或大于等于预设门限值。通过上述判断，第一STA可准确确定第一部分信道。
在一种可能的设计中，若所述第三数值集等于所述第二数值集或所述差分结果大于0或大于(或大于等于)预设门限值，所述第一STA确定所述第二数据分组的第二部分信道的带宽，并确定所述第一部分信道。采用上述判断方法，可使第一STA准确确定第一部分信道，从而解析自身的数据。
第四方面，本申请实施例提供了一种数据传输装置，具体为接入点AP，该接入点具有实现上述方法实际中接入点行为的功能，所述功能可以通过硬件实现，也可以通过硬件执行响应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，接入点AP包括处理器，收发器，所述处理器被配置为支持接入点执行上述方法中相应的功能。所述收发器用于支持接入点与第一STA和第二STA之间的通信，向第一STA和第二STA发送上述方法中所涉及的控制信息，数据分组或者指令。所述接入点还可以包括存储器，所述存储器用于与处理器耦合，其保存接入点必要的程序指令和数据。
第五方面，本申请实施例提供了一种站点，该站点具有实现上述方法设计中第一STA行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。所述模块可以是软件和/或硬件。
在一种可能的设计中，站点的结构中包括收发器，处理器，其中，收发器被配置为支持第一STA与接入点AP之间的通信，接收AP发送的第一控制信息，以及接收AP在第一部分信道上发送的第一数据分组。处理器可根据第一控制信息和第二控制信息，获取针对一个或多个第一STA的完整的资源调度信息，从而解析第一数据分组的数据字段。所述站点还可以包括存储器，所述存储器用于与处理器耦合，其保存站点必要的程序指令和数据。
又一方面，本申请实施例提供一种无线通信系统，该系统包括上述方面所述的接入点，以及，第一STA和第二STA，其中，第一STA与第二STA具有不同的能力集。
又一方面，本申请提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有 指令，所述指令可以由处理电路上的一个或多个处理器执行。当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
又一方面，本申请提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
又一方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于支持数据发送设备实现上述方面中所涉及的功能，例如生成或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存数据发送设备必要的程序指令和数据。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
可见，本申请实施例提供的技术方案带来的有益效果是：
通过本申请实施例提供的方法，当包含主信道在内的部分信道上发送第二STA数据的同时，还可以在其他从信道上向第一STA发送数据，提升了信道利用率，并且，通过在控制信息中携带第一STA可获取资源调度信息的一个或多个子信道的指示，使得第一STA可在所指示的一个或多个子信道信道获取资源调度信息并解析自身的数据分组，在有效利用信道带宽的基础上，还降低了第一STA读取资源调度信息的复杂度，提升了传输效率，并可支持更灵活的混合传输模式。
附图说明
为了更清楚地说明本发明实施例，下面将对实施例中所需要使用的附图作简单地介绍。显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获取其他的附图。
图1示出了本申请实施例一种可能的应用场景示意图；
图2示出了802.11系统中的一种信道划分示意图；
图3示出了本申请实施例提供的一种数据传输方法的流程示意图；
图4a示出了本申请实施例提供的一种第一控制信息的示意图；
图4b示出了本申请实施例提供的又一种第一控制信息的示意图；
图4c示出了本申请实施例提供的一种遵循第一标准的物理层前导的示意图；
图4d示出了本申请实施例提供的一种数据传输方法的时序示意图；
图5示出了本申请实施例提供的一种信道指示图；
图6示出了本申请实施例提供的一种数据传输方法的流程示意图；
图7示出了本申请实施例提供的一种数据传输方法的时序示意图；
图8示出了本申请实施例提供的一种数据传输方法的流程示意图；
图9示出了本申请实施例提供的一种数据传输方法的时序示意图；
图10示出了本申请实施例提供的一种数据传输方法的流程示意图；
图11示出了本申请实施例提供的一种数据传输方法的时序示意图；
图12示出了本申请实施例提供的一种遵循第一标准的触发帧帧结构示意图；
图13示出了本申请实施例提供的又一种触发帧帧结构示意图；
图14示出了本申请实施例提供的又一种数据传输方法的时序示意图；
图15示出了本申请实施例提供的又一种数据传输方法的时序示意图；
图16示出了本申请实施例提供的一种遵循第一标准PPDU的示意图；
图17示出了本申请实施例提供的又一种遵循第一标准的PPDU的示意图；
图18示出了本申请实施例提供的一种接入点的结构示意图；
图19示出了本申请实施例提供的一种站点的结构示意图。
具体实施方式
本申请实施例描述的场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定。显然，所描述的实施例仅仅是本发明的一部分实施例，并不是全部的实施例，基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
参阅图1，示出了一种无线局域网(Wireless Local Access Network，简称WLAN)通信系统100。该通信系统100包括接入点AP 103，一个或多个第一STA 101，以及，一个或多个第二STA 102，第一STA 101与第二STA 102具有不同的能力集。一个示例中，一个或多个第一STA 101可以具有第一能力集，一个或多个第二STA 102可以具有第二能力集，具有第一能力集的一个或多个第一站点STA 101可以遵循第一标准的，具有第二能力集的一个或多个第二站点STA 102可以遵循第二标准的。在一些方面，具有第一能力集的第一STA 101可以比具有第二能力集的第二STA 102高级，具有第二能力集的STA 102可以是旧式设备。一个示例中，第一标准可以后向兼容第二标准，例如，第一标准可以是802.11ax的下一代无线通信标准协议或更下一代无线通信标准协议，第二标准可以是802.11a或802.11g或802.11n或802.11ac或802.11ax等无线通信标准协议；另一方面，具有第一能力集的第一STA 101可以支持第一标准，其中，第一标准可以后向兼容第二标准，具有第二能力集的第二STA 102可以既支持第一标准，还支持第二标准，但工作在第二标准模式下。接入点AP103是一种具有无线通信功能的装置，具有与一个或多个第一STA 101通信的功能，还具有与一个或多个第二STA 102通信的功能。接入点AP 103可以是采用802.11协议进行数据传输的AP。在一示例中，多个站点STA经由遵循WiFi的无线链路连接到AP以获得至因特网或至其他广域网的一般连通性。在一些实现中，STA也可被用作AP。可以理解的，上述WLAN通信系统100中的AP与STA的数量仅是示例性的，并不构成对本申请实施例的限定。
本领域技术人员可以理解的，在上述WLAN通信系统中，本申请涉及到的上述第一STA 101和第二STA 102还可以是各种具有无线通信功能的用户终端、用户装置，接入装置，订户站，订户单元，移动站，用户代理，用户装备或其他名称，其中，用户终端可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备,以及各种形式的用户设备(User Equipment,简称UE),移动台(Mobile station,简称MS)，终端(terminal)，终端设备(Terminal Equipment)，便携式通信设备，手持机，便携式计算设备，娱乐设备，游戏设备或系统，全球定位系统设备或被配置为经由无线介质进行网络通信的任何其他合适的设备等等。在此，为了描述方便，上面提到的设备统称为站点或STA。
本申请所涉及到的接入点AP103是一种部署在无线通信网络中为站点提供无线通信功能的装置，可用作WLAN的中枢，该装置可以具有全双工的功能，所述接入点AP103还可以为基站、路由器、网关、中继器，通信服务器，交换机或网桥等，其中，所述基站可以包括各种形式的宏基站，微基站，中继站等。在此为描述方便，将上述为站点STA提供无线通信功能服务的装置统称为接入点AP。
在WLAN中，信道通常分为主信道和从信道，其中，从信道可包含一个或多个子信道。一 个示例中，若以20MHz为基本带宽单位进行划分，当信道带宽为20MHz时，仅具有一个带宽为20MHz的主信道；当信道带宽大于20MHz时，包含一个带宽为20MHz的信道为主信道，其余的一个或多个20MHz信道为从信道。例如，图2示所示，信道带宽为160MHz，将该信道依次编号为信道1至信道8，每一个序号代表一个20MHz信道；其中，信道1代表一个20MHz主信道(primary 20MHz channel,简称P20)，信道2代表一个20MHz从信道(secondary 20MHz channel,简称S20)，一个40MHz从信道(secondary 40MHz channel，简称S40)包含两个带宽为20MHz的子信道，分别为信道3与信道4，一个80MHz从信道(secondary 80MHz channel，简称S80)包含四个带宽为20MHz的子信道，分别为信道5,6,7,8，其中，信道5和6，信道6和7，信道7和8分别相邻。可以理解的，一个40MHz从信道的含义为该从信道的带宽为40MHz，包含两个20MHz的从信道。
应理解的是，信道1至8的排列方式可以如图2所示，还可以是其他多种方式，本发明中不做限定。为了介绍方便，在本发明所有的实施例中对于WLAN中信道的划分，以信道1为主信道。需要说明的是，802.11系统支持各种不同大小的信道带宽，并且该带宽可以是20MHz，40MHz，80MHz，160MHz连续的带宽，或者80MHz+80MHz非连续的带宽之一，在下一代802.11标准中，信道带宽还可以是320MHz或其他，其信道划分方法可以与上述160MHz信道类似，在此不再赘述。
需要说明的是，基于收发机的工作原理，本实施例所涉及到的“同时”是实质的同时，不需要严格限定在上述不同的信道上的处理没有任何时间上的差异，只需要满足整体上上述处理在时间维度大致相同即可。且本申请实施例方案中多个站点同时与AP进行通信是有益的。例如，这可允许多个STA在较少时间内接收来自AP的发送的数据，并且能够以较小延迟向AP发送数据。这还可允许AP总体上与较大数目的设备进行通信，并且还可使带宽使用更加高效。通过使用多址通信，AP可以能够一次在80MHz带宽上向例如四个设备复用OFDM码元，其中每个设备利用20MHz带宽。因此，多址在一些方面可以是有益的，因为它可以允许AP更高效地使用对其可用的频谱。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，表示前后关联对象是一种“或”的关系。
下面结合更多的附图，对本实施例的方案进行说明。本文描述的各方面可被用作IEEE802.11协议的一部分，尤其是支持正交频分多址(OFDMA)通信的802.11协议。
图3为本实施例的一种数据传输方法的流程示意图。
S301，接入点AP生成针对一个或多个第一STA的第一控制信息；其中，所述第一控制信息包括：第一指示，用于指示一个或多个子信道；
S302，接入点AP至少在主信道上发送第一控制信息；
AP在发送第一控制信息之前，可以先进行信道载波监听，当AP监听到总信道全部空闲时，或总信道中主信道以及部分从信道空闲时，AP可以进行多信道混合传输。其中，总信道包含主信道和一个或多个从信道，一个从信道可包含一个或多个子信道；
具体的，上述第一控制信息可以由调度帧携带，该调度帧可以为MAC(媒体介入控制，Medium Access Control，简称MAC)帧，可以为控制帧，管理帧或数据帧中的一种。
S303，所述接入点AP在总信道的第一部分信道上发送针对一个或多个第一STA的第一数据分组；以及，同时，在所述总信道的第二部分信道上发送针对一个或多个第二STA的第二 数据分组；
所述第一数据分组包含针对所述一个或多个第一STA的第二控制信息；所述第一部分信道包含所述一个或多个子信道，且所述一个或多个子信道承载所述第二控制信息，所述第二部分信道包含所述主信道，所述第一部分信道与所述第二部分信道不重叠；所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息；其中，所述第一STA与所述第二STA具有不同的能力集。
接入点AP在发送第一控制信息后，在总信道的第一部分信道上发送针对一个或多个第一STA的数据分组，以及，同时，在所述总信道的第二部分信道上发送针对一个或多个第二STA的第二数据分组。
可以理解的，对于具有灵活双工功能的AP，当AP在总信道的第一部分信道上发送第一数据分组的同时，还可以在所述总信道的第二部分信道上接收第二数据分组，其中，第二数据分组中包含上述一个或多个第二STA的上行数据。
S304，第一STA至少在主信道上接收针对一个或多个第一站点STA的第一控制信息；
S305，第一STA在总信道的第一部分信道上接收第一数据分组，其中，所述第一数据分组包含针对所述一个或多个第一STA的第二控制信息；第一部分信道包含所述一个或多个子信道，且所述一个或多个子信道承载第二控制信息；第一控制信息和/或第二控制信息还包含针对所述一个或多个第一STA的资源调度信息；
S306，第一STA根据第一控制信息和第二控制信息，解析所述第一数据分组的数据字段。
一种示例中，第一控制信息中的第一指示可以是由一个或多个比特位组成比特位图，以指示所述一个或多个子信道，其中，每一个比特位对应一个20MHz的信道，第一个比特位对应主信道。第一指示还可以复用于指示总信道的带宽。例如，当第一指示的比特位图为0011时，其中，所指示的一个或多个子信道为图2中的信道3和4，总信道带宽为80MHz；又例如，当第一指示比特位图为00111100时，指示的一个或多个子信道为图2中的信道3,4,5,6，总信道带宽为160MHz。
另一种示例中，第一指示可以是一个或多个子信道的索引信息，例如，当一个或多个子信道为两个子信道时，第一指示可以包含，两个子信道中的第一个子信道的索引信息，以及，两个子信道中的第二个子信道的索引信息。
可选的，第一控制信息还可以包含第二指示，用于指示第一控制信息后的主信道上没有承载针对所述一个或者多个第一STA的数据；可以理解的，该第二指示，还可以称为混合传输指示标识，用于向第一STA指示第一控制信息后，AP进行了混合数据传输；
一种示例中，上述第二指示可以是由一个或多个比特位组成，用于向一个或多个第一STA指示所述第一控制信息后的主信道上没有承载针对所述一个或多个第一STA的数据。例如，当第二指示采用一个比特，且取值为0时，指示主信道上没有承载针对所述一个或多个第一STA的数据，当第二指示取值为1时，指示主信道上承载了针对所述一个或多个第一STA的数据，即未进行混合传输；
可以理解的，第一控制信息中还可以不包含第二指示信息，而是采用协议约定的方式。例如，可以约定当第一STA接收到上述第一控制信息后，第一STA确定AP在发送第一控制信息后，进行混合传输，且主信道上未承载第一STA的数据。
在一种可选的方式中，第一控制信息的结构可以例如图4a所示，第一控制信息401.1可以包括：第一指示401.2，第二指示401.3，还可以包括其他信息401.4。其中，其他信息401.4， 可包括但不限于下述中的一个或多个的任意组合：
上下行指示，基本服务集颜色BSS Color(Basic service set color，简称BSS color)，空间复用参数(Spatial reuse parameters)和调制与编码方案(Modulation and Coding scheme)。
具体的，上下行指示，用于指示该第一控制信息后续发送的数据分组为上行或下行数据分组。其中，至少指示上述第一数据分组为上行或者下行；也可以进一步指示上述第二数据分组为上行或者下行；
在不允许灵活双工的系统中，上述第一数据分组和第二数据分组是相同的方向，可以采用同一个指示复用的指示该第一数据分组和第二数据分组是上行，或者该第一数据分组和第二数据分组是下行。在允许灵活双工的系统中，上述传输的方向还可以是：上述第一数据分组为上行，且所述第二数据分组为下行；或者，指示上述第一数据分组为下行，且所述第二数据分组为上行；
具体的，基本服务集颜色BSS Color，用于标识遵循第一标准的第一STA所在的基本服务集BSS(Basic service set，简称BSS)；
总信道的第二部分信道的带宽，有助于第一STA结合总信道带宽，快速确定第一STA的第一数据分组及第二控制信息所在的信道。
另一种可选的方式中，第一控制信息的结构可以如图4b所示，第一控制信息可包含公共信息部分401.5和资源调度信息部分401.6。其中，公共信息部分401.5可以包含第一指示401.2，还可以可选的包含上述其他信息401.4。资源调度信息部分401.6可以可选的包含针对主信道的资源调度信息401.7，还可以可选的包含针对全部或部分所述一个或多个第一STA的资源调度信息401.8。
针对主信道的资源调度信息401.7可以包含主信道的资源单元分配信息和主信道的资源单元上被调度的站点的信息，该被调度的站点的信息可以包含：被调度站点的关联标识符AID(Association Identifier，简称AID)，被调度站点的空时流数(Number of Space Time streams，简称NSTS)，是否采用波束成形发送以及调制和编码方案MCS等信息。在一种示例中，第二指示可以包括：所述主信道的资源单元分配信息指示主信道上分配给所述一个或多个第一STA的资源单元为空，例如，可以将资源单元分配信息的值设置为01110001，以指示主信道中的资源单元RU(Resource Unit，简称RU)为一个空的242-tone(子载波)的RU，即主信道上不承载第一标准的第一STA的数据。另一种示例中，第二指示可以包含：所述主信道上被调度的站点的AID为预留值。例如，可以将主信道的资源调度信息所调度的一个或多个站点的每一个STA的AID设置为2046，第一STA无法识别该预留的站点标识符，则确定主信道上未调度一个或多个第一STA进行数据传输，即主信道上不承载一个或多个第一STA的数据。
第一控制信息和/或第二控制信息还包含针对上述一个或多个第一STA的资源调度信息；其中，针对上述一个或多个第一STA的资源调度信息可包含：一个或多个第一STA的资源单元分配信息，和，一个或多个第一STA的站点信息，站点信息同样的可以包含关联标识符AID等。
需要说明的是，在采用OFDMA的802.11协议中，OFDMA系统中包含多个子载波，但多个子载波被划分成多组子载波，其中，一组子载波可构成一个资源单元(RU)。例如，在802.11ax协议中，一个资源单元(Resource Unit，简称RU)最少包含26个子载波,包含26个子载波 的资源单元称为26-tone RU。一个资源单元上可调度多个站点。
一种可选的方式中，第一控制信息和第二控制信息中的至少一个包含针对上述一个或多个第一STA的资源调度信息，具体为：第一控制信息的资源调度信息401.8包含针对上述一个或多个第一STA的资源调度信息以及第二控制信息也包含针对上述一个或多个第一STA的资源调度信息；或者，第一控制信息不包含针对上述一个或多个第一STA的资源调度信息，即不包含资源调度信息401.8，第二控制信息包含针对上述一个或多个第一STA的资源调度信息；例如，当第一数据分组包含4个第一STA的数据时，4个第一STA分别为STA1，STA2，STA3，STA4，第一控制信息的资源调度信息401.8包含针对STA1，STA2，STA3，STA4的资源调度信息，第二控制信息也包含针对STA1，STA2，STA3，STA4的资源调度信息。
另一种可选的方式中，第一控制信息还包含针对上述一个或多个第一STA的中第一部分第一STA的资源调度信息，第二控制信息包含上述一个或多个第一STA中的第二部分第一STA的资源调度信息；可以理解的，第一部分第一STA和第二部分第一STA的交集可以为空，也可以不为空，但第一部分第一STA和第二部分第一STA的的并集为上述一个或多个第一STA；例如，上述一个或多个第一STA为STA1，STA2，STA3，STA4，其中，第一控制信息的资源调度信息401.8包含针对STA1和STA2的资源调度信息，第二控制信息包含针对STA3和STA4的资源调度信息；又例如，第一控制信息的资源调度信息401.8包含针对STA1，STA2，STA3的资源调度信息，第二控制信息包含针对STA2，STA3，STA4资源调度信息。可以理解的，第一控制信息的结构还可以为其他形式，图4a和图4b示出的第一控制信息的结构仅为示例性的，并不构成限定。
第一数据分组包含遵循第一标准的物理层前导和针对一个或多个第一STA的数据字段；第二数据分组包含遵循第二标准的物理层前导和针对一个或多个第二STA的数据字段；
可选的，第一STA的第一数据分组的数据字段的符号长度与第二STA的第二数据分组的数据字段的符号长度可以相同。
一种示例中，若第二STA为遵循802.11a或802.11g或802.11n或802.11ac等标准协议的站点，第二数据分组的数据字段的数据符号长度为1X，第一数据分组数据字段的数据符号长度也为1X；
另一种示例中，若第二STA为遵循802.11ax标准协议的HE STA(High Efficiency Station，简称HE STA)，第二数据分组数据字段的数据符号长度为4X，第一数据分组的数据字段的数据符号长度也为4X。
第二控制信息包含于在总信道的第一部分信道上发送的第一数据分组中，第二控制信息可包含于第一指示所指的一个或多个子信道上所承载的遵循第一标准的物理层前导中，可以理解的，第二控制信息可在第一部分信道上的除第一指示所指的一个或多个子信道中的其他子信道上重复。
如图4c所示，遵循第一标准的物理层前导的可以包含：传统短训练字段404.1(Legacy Short Training Field,简称L-STF)，传统长训练字段404.2(Legacy Long Training Field,简称L-LTF)，传统信令字段404.3(Legacy Signal Field，简称L-SIG)，用来保证后向兼容性。遵循第一标准的物理层前导还可以包括信令字段A(Signal A,简称SIG-A)404.4和信令字段B(Signal B,简称SIG-B)404.5，携带第一STA读取数据所需的相关信令信息和资源调度信息。短训练序列(short training field，简称STF)和长训练序列(long training field,简称LTF)，可以分别用于进行多输入多输出MIMO(Multiple Input Multiple Output， 简称MIMO)情况下的AGC(Automatic Gain Control，自动增益控制)和信道测量。其中长训练序列LTF字段可能包含多个LTF符号，用来进行多个空时流上的信道测量。
一个示例中，第二控制信息可包含于信令字段B 404.5中。例如，第二控制信息可以为信令字段B中的资源分配字段。
第一STA至少在主信道上接收第一控制信息，第一STA可以根据第一控制信息中的第一指示，确定在第一控制信息后的主信道上没有承载第一STA的数据，或者，确定第一控制信息后AP进行了混合传输；并根据第一指示，第一STA确定第一指示所指的包含第二控制信息的一个或多个子信道，并在所指示的一个或多个子信道上，获取第二控制信息，并根据第一控制信息和/或第二控制信息，获取全部的资源调度信息。例如，当第一控制信息中包含一个或多个第一STA中的第一部分第一STA的资源调度信息，第二控制信息中包含一个或多个第一STA的第二部分第一STA的资源调度信息时，第一STA结合第一控制信息和第二控制信息，获取全部的资源调度信息。进一步的，第一STA根据获取到的全部资源调度信息，确定自身被调度的资源单元信息，从而解析第一数据分组中的数据字段，获得对应自身的数据部分。
例如图4d所示，以总信道为160MHz为例进行说明；其中总信道包括20MHz主信道，20MHz从信道，40MHz从信道(包括2个20MHz的子信道，包括信道3,4),80MHz从信道(包括4个20MHz的子信道，分别为信道5，6,7,8)，且假设AP调度4个第一STA，分别为STA1，STA2，STA3，STA4；AP生成第一控制信息401.1，第一控制信息401.1包含第一指示，以及可选的包含第二指示，与一个或多个第一STA中的STA1和STA2的资源分配信息，其中，第一指示所指的一个或多个子信道为信道6或信道8，第一控制信息401.1携带在MAC层帧调度帧401，其中，该调度帧401携带在物理层协议数据单元PPDU(physical layer protocol data unit，简称PPDU)402的数据字段部分，AP可以至少在主信道上发送上述PPDU 402；进一步的，AP发送携带第一控制信息的PPDU 402之后，AP可以在20MHz主信道(信道1)和20MHz从信道(信道2)上向至少一个第二STA发送第二数据分组403.2，还可以仅在20MHz主信道(信道1)上发送第二数据分组(附图未示出)，其中，第二数据分组403.2包含遵循第二标准的物理层前导和一个或多个第二STA的数据字段；同时，AP在总信道的第一部分信道(信道5,6,7,8)上发送针对一个或多个第一STA的第一数据分组403.1，第一部分信道包含第一指示所指示的一个或多个子信道(信道6和信道8)，其中，第一数据分组403.1包含遵循第一标准的物理层前导和一个或多个第一STA的数据字段，且在信道6和信道8上承载的遵循第一标准的物理层前导中包含第二控制信息，该第二控制信息包含针对一个或多个第一STA中的STA3和STA4的资源调度信息；第一STA接收携带第一控制信息的PPDU 402，第一STA解析PPDU 402后获取第一控制信息401.1；根据第一控制信息401.1中的第一或第二指示，第一STA确定在第一控制信息后的主信道上没有承载一个或多个第一STA的数据；第一STA在总信道的第一部分信道(信道5,6,7,8)上接收第一数据分组，并根据第一控制信息中的第一指示，第一STA在所述第一指示所指示的子信道6或子信道8上获取第二控制信息；进一步的，第一STA(例如STA1)根据第一控制信息和第二控制信息获取针对一个或多个第一STA的完整的资源调度信息，并确定传输该第一STA数据的资源单元，从而解析第一数据分组的数据字段，获取自身的数据。
本实施例AP进行多信道混合传输时，尤其是AP灵活的在多个非连续的从信道传输针对一个或多个第一STA的数据时，通过在第一控制信息中包含指示信息，使得第一STA可快速获取混合传输时的针对第一STA的全部资源调度信息，从而降低第一STA获取资源调度信息 的复杂度。
在本申请的又一个实施例中，基于前述的S301和S302，其中，AP发送的第一数据分组的数据字段可以包含第一触发信息，该第一触发信息用于触发一个或多个第一STA在总信道的第一部分信道上进行上行数据传输；AP发送的第二数据分组的数据字段可以包含第二触发信息，该第二触发信息用于触发一个或多个第二STA在总信道的第二部分信道上进行上行数据传输。
根据前述步骤S304，S305，S306的方法，第一STA解析第一数据分组的数据字段，并获取数据字段包含的第一触发信息；进一步的，根据第一触发信息，一个或多个第一STA在第一部分信道上，采用指定的资源单元发送上行数据。
同时，一个或多个第二STA也可以在第二部分信道上接收到第二数据分组后，根据数据字段中的第二触发信息，一个或多个第二STA在第二部分信道上，采用指定的资源单元发送上行数据。
其中，第二触发信息可以包含公共信息字段和一个或多个用户信息字段，公共信息字段可包含带宽子字段，用于指示所述一个或多个第二STA发送上行数据分组的带宽；每一个用户信息字段可以包含：一个被调度的第二STA的关联标识符AID，资源调度信息(RU Allocation)，调制编码方案MCS等信息，其中，该用户信息字段对应的资源调度信息用于指示至少在主信道上分配给该AID对应的第二STA的资源单元。因此可调度一个或多个第二STA至少在主信道上进行上行数据传输。
同样的，第一触发信息也可以包含公共信息字段和一个或多个用户信息字段，公共信息字段可包含带宽子字段，用于指示所述一个或多个第一STA发送上行数据分组的带宽；每一个用户信息字段可以包含：一个被调度的第一STA的关联标识符AID，资源调度信息(RU Allocation)，调制与编码方案MCS等信息，其中，该用户信息字段对应的资源调度信息用于指示在总信道的第一部分信道上的分配给该AID对应的第一STA的资源单元。因此可调度一个或多个第一STA在所述第一部分信道上进行上行数据传输。
在本申请的另一个实施例中，第一控制信息可以为遵循第一标准的信令字段，遵循第一标准的信令字段的结构可以与遵循第二标准的信令字段的结构相似。
第一控制信息可以包含与802.11ax标准中所定义的HE SIG-B(High efficiency SIG-B，简称HE SIG-B)类似的字段，第一控制信息可以包含公共块字段(Common Block field)和用户特定字段(User Specific field)字段，其中，公共块字段主要用来指示资源单元的分配，包含资源单元分配字段(Resource Unit Allocation subfield)，该资源单元分配字段可以用于指示频域上资源单元的分配以及每个资源单元里的STA的数目。
用户特定字段中的逐个站点字段可以包含可在对应的资源单元上被调度的站点标识(一般为STA的关联标识符AID)，单个用户的空时流数(number of spatial streams),波束成形传输指示(Transmit Beamforming)，调制与编码方案MCS，双载波调制(Dual coding modulation，简称DCM)等信息。
一个示例中，第二指示可以由资源单元分配字段(Resource Unit Allocation subfield)来指示，例如，可以将针对20MHz主信道上的资源单元分配子字段的值设置为01110001，以指示主信道中的资源单元RU(Resource Unit，简称RU)为一个空的242-tone(子载波)的RU， 即主信道上不承载第一标准的第一STA的数据。
另一个示例中，第二指示可以由针对20MHz主资源单元分配字段中的每一个资源单元对应的站点的关联标识符AID(Association Identifier，简称AID)来指示，具体可以将所述每一个站点的AID置为预留值。例如，可以将每一个STA的AID设置为2046，隐含表示主信道上的RU为空，即主信道上不承载第一标准的第一STA的数据。
第一控制信息还可以包含带宽BW(bandwidth，简称BW)，上下行指示，基本服务集合颜色BSS Color，空间复用参数(Spatial reuse parameters,简称SRP)，信令字段B(Signal B，简称SIG-B)的符号数，SIG-B所采用的调制与编码方案MCS等。第一控制信息还可以包含第二STA的第二数据所占据的带宽，以便于第一STA快速确定第一STA的第一数据分组包含第二控制信息的信道。
一个示例中，第一控制信息中的第一指示可以为带宽BW，与802.11ax标准中所定义的带宽功能相同的是，第一控制信息中的带宽BW可用于指示总信道的带宽；而不同的是，第一控制信息中的带宽BW还用于指示承载第二控制信息的所述一个或多个子信道，以便于第一STA在所述一个或多个子信道上获取第二控制信息，从而获取完整的资源指示信息，并解析第一数据分组的数据字段。
具体的，当带宽BW取值不同时，第一指示所指的承载第二控制信息的子信道不同。
当带宽BW取第一值时,指示总信道带宽为40MHz，总信道分为：20MHz主信道P20和20MHz从信道S20，第一指示所指示的子信道为S20(信道2)，具体的，AP在P20上发送针对一个或多个第二STA的第二数据分组，AP在S20发送包含第二控制信息的第一数据分组，例如图5中BW＝1所示；
当带宽BW取第二值时,指示总带宽为80MHz，分为：20MHz主信道P20，20MHz从信道S20以及40MHz从信道S40，其中，AP可以根据第二STA的带宽需求，选取P20传输针对一个或多个第二STA的第二数据分组，即对应第二STA的带宽为20MHz，或选取P20与S20传输针对一个或多个第二STA的第二数据分组，即对应第二STA分配的带宽为40MHz，AP可选取剩余未被第二STA占据的连续信道发送针对一个或多个第一STA的第一数据分组。例如,图5中BW＝2所示；
当带宽BW取第三值时，指示总带宽为160MHz或80MHz+80MHz，分为：20MHz主信道P20，20MHz从信道S20，以及40MHz从信道S40，80MHz从信道S80。AP选取包含主信道在内的部分信道发送针对一个或多个第二STA的第二数据分组，AP选取剩余未被第二STA占据的连续信道传输一个或多个第一STA的第一数据分组，例如，图5中BW＝3所示
当带宽BW取第四值时，指示总带宽为80MHz，分为：20MHz主信道(P20)，20MHz从信道S20，以及40MHz从信道S40，AP可以在P20或者P20与S20上发送针对一个或多个第二STA的第二数据分组，其中，S20上的数据分组的前导码可被打孔(puncture)，对应第二STA带宽为20MHz或40MHz；AP选取剩余未被第二STA占据的信道发送针对一个或多个第一STA的第一数据分组。例如图5中BW＝4所示；
当带宽BW取第五值时，指示总带宽为80MHz，分为：20MHz主信道P20，20MHz从信道S20，以及40MHz从信道S40，其中，S40中的两个20MHz子信道中有一个前导码被打孔(puncture)；AP可选取P20传输针对一个或多个第二STA的第二数据分组，对应第二STA带宽为20MHz，AP可选取S20或S20与S40中前导码未被打孔(puncture)的一个20MHz子信道上传输针对一个或多个第一STA的第一数据分组。例如图5中BW＝5所示；
当带宽BW取第六值时，指示总带宽为160Mhz或80MHz+80MHz，其中，在S20上前导码被打孔，则AP可以在P20或者P20与S20上传输针对一个或多个第二STA的第二数据分组，对应第二STA带宽为20MHz或40MHz；AP选取剩余未被第二STA占据的其他至少一个从信道发送针对一个或多个第一STA的第一数据分组。例如图5中BW＝6所示；
当带宽BW取第七值时，指示总带宽为160Mhz或80MHz+80MHz，其中，S40中任意一个20MHz的前导码被打孔，AP可选取P20发送针对一个或多个第二STA的第二数据分组，对应第二STA带宽为20MHz，AP可选取S20或S20与S40中前导码未被打孔的一个20MHz子信道上发送针对一个或多个第一STA的第一数据分组，其中一种混合传输模式可以例如图5中BW＝7所示；
可选的，带宽BW取值为第一值，第二值和第三值时，所述第一控制信息还可以包含第二数据分组所占据的带宽，进一步的，第一STA可以根据第一控制信息包含的带宽BW和第二数据分组的带宽，确定第一STA的第一数据分组所占据的从信道。
可以理解的，上述带宽BW的取值与其对应的含义是可以相交换的。并且，对于总信道带宽为160MHz或80MHz+80MHz的情形，AP还可以在S80上传输针对一个或多个第一STA的第一数据分组，也可以在S80中的任意一个或多个20MHz子信道上传输针对一个或多个第一STA的第一数据分组(图5中未示出)。且需要说明的是，图5仅是示例性的，并未示出带宽BW的所有可能取值所指示的一个或多个子信道组合。此外，除上述带宽BW取值外，还可以包括更多其他取值以指示更多的从信道组合模式，例如，还可以包含当带宽BW取值为第八值时，指示信道总带宽为320MHz，其指示的用于传输包含第二控制信息的第一数据分组的从信道的组合可参照前述的方式，本实施例在此不具体限定。
与前述步骤S303，S304，S305类似的，当第一STA，接收到第一控制信息后，根据第一控制信息，获知在第一控制信息后的主信道上没有承载第一STA的数据，再根据第一控制信息中包含的第一指示，在第一指示所指示的一个或多个子信道上的获取第二控制信息。根据第一控制信息和第二控制信息，第一STA获取针对一个或多个第一STA的完整资源分配信息，从而解析第一数据分组的数据字段。例如，当第一控制信息的第一指示取为第四值，指示AP在信道3和信道4上发送针对第一STA且包含第二控制信息的第一数据分组，且第二控制信息可包含一个或多个第一STA中第一部分第一STA的资源调度信息，第二控制信息承载于信道4上；当第一控制信息还包含针对一个或多个第一STA中的第二部分第一STA的资源调度信息时，第一STA接收到上述第一控制信息后，可以在第一控制信息中获取针对第一部分第一STA的资源调度信息，并在第二控制信息中获取针对第二部分第一STA的资源调度信息，从而解析第一数据分组的数据字段。
在本实施例中，AP在进行多信道下行混合传输时，尤其是在前导码打孔的情况下，通过在第一控制信息中携带遵循第一标准的信令字段，使得第一STA可以在第一控制信息中获取解析第一数据分组的信令信息，即可使得第一STA按照非混合传输情况下的接收流程读取信令并获取资源调度信息以解析第一数据分组的数据字段，降低了第一STA的复杂度。
本申请的另一个实施例提供又一种数据传输方法包括：
S601，AP至少在主信道上发送针对一个或多个第一STA的第一控制信息；
其中，所述第一控制信息包括：
第一指示，用于指示一个第一子信道；以及，
第二指示，用于指示一个第二子信道。
可以理解的，第一指示可以为第一子信道的信道编号或信道索引，例如，当第一指示取值为11时，可指示的第一子信道为图2中的信道4，当第一指示取值为10时，可指示的第一子信道为图2中信道3；
同样的，第二指示也可以为第二子信道的信道标号或信道索引。
S602，AP在总信道的第一部分信道上发送针对一个或多个第一STA的第一数据分组，以及，同时在总信道的第二部分信道上发送针对一个或多个第二STA的第二数据分组；
其中，第一部分信道与第二部分信道不重叠，第一部分信道包含第一子信道和第二子信道，第二部分信道包含主信道，第一数据分组包含第一资源调度信息和第二资源调度信息，所述第一子信道承载第一资源调度信息，所述第二子信道承载第二资源调度信息；
所述第一资源调度信息与所述第二资源调度信息包含针对所述一个或多个第一STA的资源调度信息。
所述第一资源调度信息与所述第二资源调度信息用于指示所述一个或多个第一STA的解析第一数据分组。
其中，第一STA与第二STA具有不同的能力集。
S603，第一STA至少在主信道上接收针对一个或多个第一STA的第一控制信息；
S604，第一STA在总信道的第一部分信道上接收第一数据分组，根据第一指示，第一STA在第一子信道上获取第一资源调度信息，根据第二指示，第一STA在第二子信道上获取第二资源调度信息；根据所述第一资源调度信息和第二资源调度信息，第一STA解析第一数据分组的数据字段。
具体的，第一资源调度信息包含针对所述一个或多个第一STA中的第一部分第一STA的资源调度信息；第二资源调度信息可以包含针对所述一个或多个第一STA中第二部分第一STA的资源调度信息。其中，第一部分第一STA和第二部分第一STA交集可为空，也可以不为空；第一部分第一STA和第二部分第一STA的并集为所述一个或多个第一STA。
可以理解的，当第一STA成功读取到一个第一资源调度信息和一个第二资源调度信息，即可获取解析第一数据分组数据字段的完整的资源调度信息。
例如图7所示，同样的，第一控制信息701.1可以采用如前述第一控制信息401.1的发送方法，在此不再赘述。第一控制信息701.1中包含第一指示701.2和第二指示701.3，AP在总信道的第一部分信道(包含信道5,6,7,8)上发送针对一个或多个第一STA的第一数据分组703.1，这里以一个或多个第一STA为STA1，STA2，STA3，STA4为例，即第一数据分组703.1所占据的所有从信道的带宽为80MHz，其中，在信道5和信道7上承载的遵循第一标准的物理层前导中包含第一资源调度信息704，在信道6和信道8上承载的遵循第一标准的物理层前导中包含第二资源调度信息705，第一资源调度信息可包含针对STA1和STA2资源调度信息，第二资源调度信息可包含针对STA3和STA4的资源调度信息。可以理解的，第一STA获取一个第一资源调度信息和一个第二资源调度信息即可获取全部完整的资源调度信息。因此，第一指示701.2指示信道5或信道7中的一个即可，第二指示701.3指示信道6或信道8中的一个即可。进一步的，第一STA根据第一指示，获取第一资源调度信息，根据第二指示，获取第二资源调度信息，则第一STA结合第一资源调度信息和第二资源调度信息，即可解析第一数据分组的数据字段。
一个示例中，可以总共采用2个比特位来指示承载第一资源调度信息的第一子信道和承 载第二资源调度信息的第二子信道，并指示总信道带宽为80MHz，其中，第一指示可以采用1个比特位，指示第一资源调度信息所在的第一子信道，第二指示可以采用另外的1个比特位以指示第二资源调度信息所在的第二子信道。例如表1和表2所示，根据图2所示的信道编号，当第一指示取值为1时，指示第一子信道为信道3，信道3承载第一资源调度信息，当第二指示取值为1时，指示第二子信道为信道4，信道4承载第二资源调度信息。需要说明的是，当第一指示取值为0时，指示信道1承载第一资源调度信息，则可以理解的，主信道上传输的是第一STA的数据，因此未进行混合传输。
表1
第一指示的取值 第一资源调度信息所在的信道
1 信道3
0 信道1
表2
第二指示的取值 第二资源调度信息所在的信道
1 信道4
0 信道2
另一个示例，可以总共采用4个比特位来指示承载第一资源调度信息的第一子信道和承载第二资源调度信息的第二子信道，并指示总信道带宽为160MHz，其中，第一指示可以采用两个比特位指示承载第一资源调度信息的第一子信道，第二指示可以采用另外两个比特位以指示承载第二资源调度信息的第二子信道，例如表3和表4所示。可以理解的，当传输第一STA的第一数据分组的信道编号为3,4,5,6,7,8时，第一资源调度信息可重复的承载于信道3,5,7上第二资源调度信息重复的承载于信道4,6,8，则第一指示取值可以为11,10或00中的任意一个，第二指示取值可以为11,10,00中的任意一个。
表3
第一指示的取值 承载第一资源调度信息的信道
11 信道7
10 信道5
01 信道3
00 信道1
表4
第二指示的取值 承载第二资源调度信息的信道
11 信道8
10 信道6
01 信道4
00 信道2
又一示例中，可以总共采用8比特位来指示承载第一资源调度信息的第一子信道和第二资源调度信息的第二子信道，并指示总信道带宽为320MHz，其中，第一指示可以采用三个比特位以指示承载第一资源调度信息的第一子信道，第二指示可以采用另外三个比特位可以指 示承载第二资源调度信息的第二子信道。
又一示例中，在802.11标准中，将80MHz作为一个信道分段，当第一STA的第一数据分组占据多个信道分段时，由于第一资源调度信息是重复的承载在在一部分20MHz信道上，第二资源调度信息重复的承载在另外一部分20MHz信道上，因此第一STA站点可以只需要读取某些分段上的第一资源调度信息和第二资源调度信息即可，可以进一步采用更少的比特数来指示所需读取的资源调度信息所在的从信道。例如，信道总带宽为320MHz时，分为四段，第一STA只需要读取前两段中的1个第一资源调度信息和1个第二资源调度信息即可获取完整的资源指示信息，那么在前两个分段中，仅存在4个重复的第一资源调度信息和4个重复的第二资源调度信息，因此总共只需要4个比特位来指示第一资源调度信息和第二资源调度信息所在的从信道，从而降低了开销。
可选的，第一资源调度信息和第二资源调度信息的结构可以与802.11ax中的内容信道CC(Content Channel，简称CC)相类似，第一资源调度信息可以为第一内容信道，第二资源调度信息可以为第二内容信道。内容信道CC(Content Channel，简称CC)可以由公共块字段(Common Blokc Filed)和用户特定字段(User Specific Field)构成。
公共块字段主要用于指示资源单元的分配，包含资源分配字段(Resource Unit Allocation subfield)，该资源分配字段可以用于指示频域上资源单元的分配以及每个资源单元中被调度的STA的数目。用户特定字段中的逐个站点字段可以包含在对应的资源单元上被调度的站点标识(一般为STA的关联标识符AID)，单个用户的空时流数(number of spatial stream),波束成形传输指示(Transmit Beamforming)，调制与编码方案(Modulation and coding scheme)，双载波调制(Dual coding modulation，DCM)等信息。
在一个内容信道CC中，资源分配字段的比特数为8的N倍，当N＝1时，用于指示20MHz和40MHz PPDU的资源分配信息；当N＝2时，用于指示80MHz PPDU的资源分配信息；当N＝3时，用于指示160MHz PPDU的资源分配信息。
20MHz物理层协议数据单元PPDU包含一个内容信道CC，该内容信道CC的资源分配字段为8bits，指示20MHz信道的资源分配信息，40MHz PPDU包含两个不同的内容信道CC,记为第一内容信道CC1和第二内容信道CC2，其中，CC1的资源分配字段为8bits，8bits用于指示信道1的资源分配信息，CC2的资源分配字段为8bits，用于指示信道2的资源分配信息；80MHz PPDU包含2个重复的CC1和2个重复的CC2，其中，CC1在信道1和信道3上是重复的，CC1的资源分配字段为16bits，其中，8bits用于指示信道1的资源分配信息，另外8bits用于指示信道3的资源分配信息，CC2在信道2和信道4上是重复的，CC2的资源分配字段为16bits，其中，8bits用于指示信道2的资源分配信息，另外8bits用于指示信道4的资源分配信息；160MHZ PPDU包含4个重复的CC1和4重复的个CC2，与80MHz PPDU相类似。
可以理解的，当物理层协议数据单元包含的内容信道类别超过2个时，同样，可以分别指示承载该不同类别的内容信道的子信道。例如若总信道带宽为320MHz，存在4个类别的CC，分别为4个重复的CC1，4个重复的CC2，4个重复的CC3，以及4个重复的CC4，例如CC1包含针对信道1，3,5,7的资源分配信息，CC2包含针对信道2,4,6,8的资源分配信息，CC3包含针对信道9,11,13,15的资源分配信息，CC4包含针对信道10,12,14,16的资源分配信息。则可以总共采用8个比特位来指示4个类别的CC所在的从信道，其中，第一指示可以采用第一个两比特指示承载CC1的第一子信道，第二指示可以采用第二个两比特指示承载CC2的第二子信道，并在第一控制信息中增加第三指示，采用第三个两比特指示承载CC3的第三子信 道，增加第四指示，采用第四个两比特指示承载CC4的第四子信道。
可以理解的，上述第一指示，第二指示，第三指示，或第四指示的取值与其所指示的从信道是可以变化的，并不限于本实施例列举的示例。
当第一STA接收到上述第一控制信息后，根据第一指示和第二指示，第一STA可在第一指示所指示的第一子信道上获取第一资源调度信息，和，在第二指示所指示的第二子信道上获取第二资源调度信息，结合第一资源调度信息与第二资源调度信息，第一STA解析第一数据分组的数据字段。与现有技术相比，本实施例仅指示出刚好够获取完整资源调度信息的子信道，用于指示的比特位更少，减少了开销，且不需要第一STA在每个从信道上读取重复的资源调度信息，提升了第一STA读取资源调度信息的效率。
本申请的实施例提供的又一种数据传输方法，该方法包括：
AP至少在主信道上发送针对一个或多个第一STA的第一控制信息；
其中，所述第一控制信息包括：用于指示一个从信道的标识，所述从信道用于承载第一STA的数据；
AP在所述一个从信道上发送针对遵循第一标准的一个或多个第一STA的第一数据分组，同时至少在所述主信道上发送针对遵循第二标准的一个或多个第二STA的第二数据分组。
接收点至少在主信道上接收针对一个或多个第一STA的第一控制信息；
在所述一个从信道上接收所述第一数据分组。
具体的，AP可以在固定的从信道上发送针对一个或多个第一STA的数据。例如，当用于指示一个从信道标识的取值为00时，可指示AP在20MHz从信道(例如图2中信道2)上传输第一STA的数据，且总信道带宽为40MHz；当用于指示一个从信道标识的取值为01时，可指示AP在40MHz从信道(例如图2中信道3和信道4)上传输第一STA的第一数据，且总信道带宽为80MHz；当用于指示一个从信道标识的取值为10时，可指示AP在80MHz从信道(例如图2中信道5,6,7，8)上传输第一STA的数据，总信道带宽为160MHz；当用于指示一个从信道标识的取值为11时，可指示AP在160MHz从信道上传输第一STA的数据。可以理解的，上述用于指示一个从信道标识的取值对应的具体从信道是可置换的。
当第一STA接收到所述第一控制信息后，根据第一控制信息，确定承载第一STA的第一数据分组的从信道，并在所述从信道上接收第一STA第一数据分组。
图8为本实施例提供的又一种数据传输方法的流程示意图。
S801，接入点AP在总信道的第一部分信道上发送针对一个或多个第一STA的第一数据分组，并同时，在总信道上除第一部分信道外的第二部分信道上发送针对一个或多个第二STA的第二数据分组；
其中，所述第二数据分组包含相邻的两个信令字段，所述相邻的两个信令字段符号内的4个子载波上携带用于向所述第一STA指示所述第一部分信道的信息。
用于指示所述第一部分信道的信息，具体为：在相邻的两个信令字段的第一个信令字段符号内的4个子载波上携带第一数值集，在相邻的两个信令字段的第二个信令字段符号内的4个子载波上携带第二数值集，以使第一STA根据第一数值集与第二数值集确定所述第一部分信道；
所述4个子载波的子载波索引为[-28,-27,27,28]；
第一数值集与第二数值集中至多有一个是[-1,-1,-1,1]，且第一数值集与第二数值集不同。
第二部分信道包含主信道，第一部分信道包括一个或多个从信道。
第一STA与第二STA具有不同的能力集。
S802，第一STA在第二部分信道上接收第二数据分组；其中，所述第二数据分组包含相邻的两个信令字段，所述相邻的两个信令字段符号内的4个子载波上携带用于向所述第一STA指示所述第一部分信道的信息；
S803，所述第一STA根据所述第二数据分组的所述相邻的两个信令字段符号内的4个子载波确定所述第一部分信道。
S804，在所述第一部分信道上接收所述第一数据分组。
具体的，所述第一STA确定所述第一部分信道包括：所述第一STA对所述第一信令字段符号内的4个子载波进行信道估计，以及，根据所述信道估计，所述第一STA对所述第二信令字段符号内的4个子载波解调得到第三数值集，判断所述第三数值集是否等于所述第二数值集；或者，
所述第一STA计算所述第一信令字段符号内的4个子载波传输的第一数值集，与，所述第二信令字段符号内的4个子载波传输的第二数值集的差分结果，判断所述差分结果是否不为0或大于或大于等于预设门限值；
若所述第三数值集等于所述第二数值集或所述差分结果大于0或大于(或大于等于)预设门限值，所述第一STA确定所述第二数据分组的第二部分信道的带宽，并确定所述第一部分信道。
第二数据分组包括遵循第二标准的物理层前导，遵循第二标准的物理层前导包含传统前导码(Legacy Preamble,简称L-Preamble)，其中传统前导码包括传统短训练字段(Legacy Short Training Field,L-STF)，传统长训练字段(Legacy Long Training Field,L-LTF)，和传统信令字段(Legacy Signal Field,L-SIG)。除此之外，还包含其他信令字段。当第二标准为802.11ac时，遵循第二标准的物理层前导还包含甚高吞吐量信令字段A1(Very High Throughput Signal，简称VHT-SIG A1)和甚高吞吐量信令字段A2(Very High Throughput Signal，简称VHT-SIG A2)，甚高短训练序列和甚高长训练序列；当第二标准为802.11n时，遵循第二标准的物理层前导还包含高吞吐量信令字段1(High Throughput Signal，简称HT-SIG 1)和高吞吐量信令字段2(High Throughput Signal，简称HT-SIG 2)，高吞吐量短训练序列以及高吞吐量长训练序列。
一种示例中，可以在L-SIG和与L-SIG相邻的两个信令字段符号内的4个子载波携带信息。例如，可以在L-SIG和RL-SIG符号内的4个子载波上携带信息，还可以在L-SIG和VHT-SIG A1符号内的4个子载波上携带信息，还可以在L-SIG和HT-SIG 1符号内的4个子载波上携带信息，本实施例并不具体限定。
例如，图9所示，以AP向第一STA与遵循802.11ac标准协议的第二STA进行多信道混合传输为例进行说明。AP在第二部分信道上发送针对遵循802.11ac标准协议的一个或多个第二STA的第二数据分组902，在第一部分信道上发送针对遵循第一标准的一个或多个第一STA的第一数据分组901。其中，在第二数据分组中，L-SIG 902.1符号内的4个子载波传输的数值，与，VHT-SIG A1 902.2符号内的4个子载波传输的数值不相同，且至多有一个是[-1,-1,-1,1]，可用来向第一STA指示第二数据分组中没有承载一个或多个第一STA的数据， 且该信息向第二STA隐藏，即第二STA可以正常接收L-SIG以及L-SIG紧邻的信令字段，但并不会发现L-SIG与L-SIG相邻信令字段的改变，可正常解析自身的数据。
需要说明的是，对于遵循802.11a和802.11n等802.11ax标准协议之前的数据分组，在L-SIG字段与L-SIG之后相邻的字段(例如，VHT-SIG A1或HT-SIG1)的一个符号内的子载波索引为[-28,-27,27,28]的4个子载波不传输任何数据；而对于遵循802.11ax标准协议的数据分组，在L-SIG字段与L-SIG之后相邻的字段的符号内的子载波索引为[-28,-27,27,28]的4个子载波传输的数值都为[-1,-1,-1,1]，因此，可以在L-SIG字段的符号与L-SIG之后相邻字段的符号中的至少一个符号内的所述4个子载波上不传输[-1,-1,-1,1]，则第一STA可以迅速的识别出该数据分组不为遵循802.11ax标准协议的数据分组，也不为遵循遵循802.11a和802.11n等802.11ax标准协议之前的数据分组。
在一个示例中，可以仅在主信道(第二部分信道)上的L-SIG以及与L-SIG之后相邻的字段符号内的4个子载波携带信息，向第一STA指示主信道上没有承载第一STA的数据分组，以使第一STA在除主信道外的第一部分信道上接收第一数据分组。以图9中主信道上传输遵循802.11ac标准的数据分组为例，可分别在L-SIG 902.1和VHT-SIG A1 902.2符号内的子载波索引为[-28,-27,27,28]子载波上携带信息。例如，在L-SIG 902.1符号内子载波索引为[-28,-27,27,28]的子载波上传输第一数值集[-1,-1,-1,1]，在VHT-SIG A1 902.2符号内子载波索引为[-28,-27,27,28]的子载波上传输第二数值集[1,1,1,-1]，当第一STA读取到混合数据分组中主信道上的L-SIG 902.1和VHT-SIG A1 902.2字段时，通过对L-SIG 902.1内子载波[-28,-27,27,28]进行信道估计后，对VHT-SIG A1 902.2内子载波[-28,-27,27,28]进行解调得到第三数值集，对比第三数值集是否为第二数值集[1,1,1,-1]来判断是否为混合数据传输；还可以通过对L-SIG 902.1和VHT-SIG A1 902.2子载波[-28,-27,27,28]携带的信息计算差分结果，若L-SIG与VHT-SIG A1内子载波[-28,-27,27,28]上传递的数值的差分结果为0或小于(或小于等于)某一预定的门限值，或，第三数值集不等于第二数值集，则确定未进行混合传输；若差分结果不为0或大于等于(或大于)某一预设的门限值，则确定混合数据分组正在发送，且主信道上没有承载第一STA的数据分组，因此第一STA在除主信道(第二部分信道)外的从信道(第一部分信道)上接收自身的数据分组。
在另一个示例中，还可以在主信道以及主信道相邻的至少一个从信道上(第二部分信道)的L-SIG以及L-SIG之后相邻的信令字段内的4个子载波上携带信息向第一STA指示混合数据分组正在发送，且指示在上述主信道以及主信道紧邻的至少一个从信道(第二部分信道)上没有承载第一STA的数据分组。同样的，可以分别在L-SIG以及L-SIG紧邻的信令字段内子载波索引为[-28,-27,27,28]子载波上携带信息，其具体方法与前段描述的类似，在此不再赘述。当第一STA接收到上述混合数据分组后，第一STA通过判断主信道以及主信道相邻的至少一个从信道(第二部分信道)上的L-SIG以及L-SIG之后相邻的信令字段符号的4个子载波携带的信息，可获知传输第二STA数据分组的带宽，且获知在所述第二部分信道上没有承载一个或多个第一STA的数据，因此第一STA在除上述第二部分信道之外的第一部分信道上接收第一数据分组。
在本实施例中，通过在第二数据分组相邻的两个信令字段符号内的4个子载波上携带信息以向第一STA指示混合数据分组正在发送，而不需要提前发送控制信息，以减少开销，提升了混合传输的效率。
图10为本实施例提供的又一种数据传输方法流程示例图。下面结合图10与图11进一步说明本实施例的方案。
S1001，接入点AP生成调度帧，所述调度帧包含针对一个或多个第一STA的第一触发信息，以及，针对一个或多个第二STA的第二触发信息；其中，所述第一触发信息用于调度所述一个或多个第一STA在第一部分信道上进行上行数据传输，所述第二触发信息用于调度所述一个或多个第二STA在第二部分信道上进行上行数据传输，所述第一部分信道与所述第二部分信道不重叠。
S1002，所述接入点AP发送所述调度帧。
具体的，该调度帧同样为MAC帧。可以由AP至少在主信道上发送。
S1003,遵循第一标准的第一STA接收调度帧，获取第一触发信息。
S1004，第一STA在第一部分信道上向所述AP发送数据；以及，同时，所述第二STA在所述第二部分信道上向所述AP发送数据。
可以理解的，第一部分信道与第二部分信道不重叠，可以在第一信道包含主信道，也可以在第二信道包含主信道。
第一STA和第二STA接收到AP发送的上述调度帧后，第一STA获取第一STA的第一触发信息，第二STA获取第二STA的第二触发信息，第一STA采用PPDU在第一触发信息所指示的一个或多个20MHz信道上进行传输，第二STA采用HE TB PPDU(High Efficiency Trigger based PPDU，简称HE TB PPDU)在第二触发信息所指示的另外的一个或多个20MHz信道上进行传输。
进一步的，AP接收到第一STA和第二STA发送的上行混合数据分组后，还可以向至少一个第一STA和至少一个第二STA反馈多用户块确认M-BA(multiple-user block acknowledgement，简称M-BA)。
一种示例中，该调度帧可以为聚合帧，即聚合媒体介入控制协议数据单元(Aggregated MAC Protocol Data Unit,简称A-MPDU)，例如图11所示，在聚合帧A-MPDU的一个子帧携带第二STA的第二触发帧1101.2，即遵循802.11ax标准协议的触发帧，第二触发帧包含第二触发信息，在聚合帧A-MPDU的另一个子帧携带第一STA的第一触发帧1101.1，第一触发帧包含第一触发信息，即遵循第一标准的触发帧。需要说明的是，聚合帧的物理层前导(PHY Preamble)遵循802.11ax或802.11ax之前的标准协议，以使得传统站点可以正常接收该聚合帧，并解析自身的触发帧。第二触发帧1101.2用于调度遵循802.11ax协议的一个或多个站点采用HE TB PPDU(High Efficiency Trigger based PPDU，简称HE TB PPDU)进行上行传输，第一触发帧1101.1用于调度一个或多个第一STA采用多用户PPDU进行上行传输。
需要说明的是，在某一个20MHz的信道上，调度的所有站点遵循同一种标准协议。由于在802.11ax之前的标准协议不支持触发帧，因此本实施例的第二STA特指遵循802.11ax标准协议的STA，又称HE STA(High Efficiency Station，简称HE STA)。
另一种示例中，遵循第一标准的第一触发帧1101.1的帧结构可以如图12所示。第一触发帧1101.1包含公共域和逐个站点域，逐个站点域可包含一个或多个第一STA的用户信息字段。在公共域可包含与802.11ax功能相同或相似的字段，还可以包含触发帧类型扩展字段1202(trigger type extension),触发帧类型扩展字段1202用于指示遵循下一代或更下一代标准的触发帧的类型；还可以包含半正交多址接入(semi-orthogonal multiplexing access，简称SOMA)1203，用于指示第一STA可采用的多址接入方式。此外，在逐个站点域的每一个用户信息字段(user info field)还可以包含半正交多址接入指示信息1204和时 间块指示(Time Segment)1205，其中，所述时间块指示信息用于指示站点所在的时间块。
需要说明的是，图12示出的帧结构仅是一种示例性说明，第一STA站点可能支持全双工传输，以及支持更大的传输带宽，更多的空间流等，因此可能需要更多的比特位来携带上述信息。第一STA的第一触发帧可以采用与第二触发帧相似的帧结构，也可以采用不同的帧结构，本方案并不具体限定。
在另一种可选的方式中，所述调度帧还可以是遵循802.11ax标准协议的第三触发帧，所述第三触发帧可以通过遵循802.11ax标准协议的触发帧进行转义指示，以同时调度遵循802.11ax的一个或多个第二STA和遵循第一标准的一个或多个第一STA；
所述第三触发帧包含：携带第一触发信息的第一用户信息字段，和，携带第二触发信息的第二用户信息字段，其中，所述第一用户信息字段包含用于避免第二STA误读的信息。
第三触发帧的一种可能的帧结构如图13所示，可以通过公共部分的预留比特位，例如HE SIG-A Reserved 1301或Reserved 1302，向第一STA指示第三触发帧为扩展触发帧，用于同时调度一个或多个802.11ax站点和一个或多个第一STA。在逐个站点域，可以既包含一个或多个802.11ax站点的用户信息字段1304，还包含一个或多个第一STA的用户信息字段1303。
可选的，第一STA的用户信息字段1303可以由两个802.11ax站点的用户信息字段1305和1306组成，其长度可以为802.11ax站点的用户信息字段长度的两倍。
该第一STA的用户信息字段1303可以包含第一STA的关联标识符AID 1305.1，资源指示信息1305.2，调制编码方案MCS 1305.3等与802.11ax用户信息字段功能相类似的信息，还可以包含其他信息，例如，更大的流数指示，半正交多址接入SOMA指示信息，时间复用指示信息(Time reuse)等。
在第一STA的用户信息字段1303包含的两个用户信息字段中的第二个用户信息字段1306中携带避免802.11ax站点误读的指示信息。一种可选的方式，可以将第二个用户信息字段1306中关联标识符AID的最重要比特位设置为1，当802.11ax的站点读取到该AID时，其取值大于2047，因此不会将该信息字段误读为自身的信息字段；另一种可选的方式，可以将第二个用户信息字段中的资源单元分配字段RU Allocation设置为预留值或调制编码方案MCS设置成预留值，当802.11ax站点读取到该预留值时，无法理解该预留值的含义，因此不会误读为自身的信息字段。
可以理解的，还可以采用多个第二STA的用户信息字段来表示第一STA的用户信息字段，本实施例中选取两个用户信息字段合并为一个第一STA的用户信息字段仅为示例，并不构成限定。
本实施例，通过在调度帧中包含针对第一STA的第一触发信息和针对第二STA的第二触发信息，可以同时调度一个或多个第一STA以及一个或多个第二STA进行上行混合传输，更加充分的利用了信道带宽，提升了传输效率。
与上述实施例不同的是，本实施例考虑的是当AP或者STA具有灵活双工模式时，通过多信道传输以提升带宽利用率的传输方法。
一种可选的示例中。当具备灵活双工模式的AP接收到一个或多个第二STA站点在主信道上发送的数据分组时，AP监听到其他信道，当从信道空闲时，在接收第二STA的数据分组的同时，AP可以在主信道上或不重复的80MHz信道上发送遵循第一标准的触发帧，以触发一个 或多个第一STA在其他从信道上进行上行多用户数据传输。而当全双工传输结束时，可以继续退回原始带宽，AP向一个或多个第一STA发送多用户块确认M-BA(Multiple User Block Acknowledge，简称M-BA)帧。例如，图14示出了的一种全双工上行混合传输的示例图，AP在主信道上接收一个或多个第二STA发送的PPDU 1401，当AP监听到S40信道空闲时，同时，AP可以在主信道上向一个或多个第一STA发送触发帧1402，AP在S40上接收承载一个或多个第一STA数据的PPDU 1403，进一步的，AP还可以向一个或多个第二STA反馈传统的确认信息ACK1404，AP再向一个或多个第一STA反馈多用户块确认M-BA 1405。
另一种可选的示例中，当具备全双工模式的AP接收到一个或多个第二STA在主信道上发送数据分组时，AP监听到其他信道，例如从信道空闲时，同时，AP可以在主信道以及空闲的其他从信道上向一个或多个第一STA发送下行数据。而当全双工传输结束时，可以继续退回原始带宽，AP发送多用户块确认请求MU-BAR(Multiple User Block Acknowledge Request，简称M-BAR)。例如，图15示出了的一种全双工上下行混合传输的示例图，AP在主信道上接收一个或度过第二STA发送的PPDU 1501，当AP监听到S20和S40信道空闲时，AP可以在主信道以及在S20和S40上向一个或多个第一STA发送PPDU 1502，进一步的，AP向第二STA反馈传统的确认信息ACK 1503，AP再向一个或多个第一STA发送M-BAR 1504。
本实施例在全双工模式下，当AP接收到上行数据时，可以采用调度式的上行混合传输，或者下行混合传输，从而充分利用信道，提升频谱利用率和传输效率。
本实施例提供一种自动检测的方法。
附图16为一种遵循第一标准的PPDU的帧结构，遵循第一标准的PPDU除包含传统短训练字段L-STF，和传统长训练字段L-LTF，传统信令字段L-SIG外，在传统信令字段L-SIG1601后还可以包含两个签名符号(Signature symbol)1602和1603，其中上述两个签名符号中的第一个签名符号1602为二进制相位键控调制(Binary Phase Shift Keying，BPSK)调制，其中，第一个签名符号1602包括预定的签名字段(Signature field)1603.1，用于识别该数据分组为遵循第一标准的PPDU。其中预定的签名字段包含收发两段已知的信息比特。当第一STA识别出L-SIG 1601后边的两个符号中携带签名字段1603.1时，则认定该数据分组为遵循第一标准的PPDU。此外，签名符号1602和1603中还可以包括基本服务集颜色BSS color1603.2，循环冗余码(cyclic redundancy code，简称CRC)，二进制卷积码BCC(binary convolution code，简称BCC)编码尾部(tail)比特等其他字段。可选的，两个签名字段为相同的签名字段，又或者两个签名符号为相同的签名符号，用于增加传输的鲁棒性，并用于在增强识别遵循第一标准的PPDU的可靠性。
另外，类似802.11ax的L-SIG和RL-SIG，在L-SIG和第一个签名符号的子载波索引为[-28,-27,27,28]的4个子载波上，也要携带用于进行信道估计的导频序列。而第二个签名符号的子载波索引为[-28,-27,27,28]的4个子载波上，可以用于传输信息或者作为进行信道估计的导频序列。
图17为本申请实施例提供的又一种遵循第一标准的PPDU的帧结构示例图，在上述遵循第一标准的PPDU的帧结构中，可以将L-SIG字段中的长度length1701和/或奇偶校验比特parity bit 1702加扰(scramble)到L-SIG后边的信令符号的循环冗余码CRC上去，即将L-SIG字段中的长度length 1701和/或奇偶校验比特parity bit1702同信令字段的CRC做加扰操作，将加扰后的结果放置在图17的长度加扰CRC字段。另一种实现方式中，可以将 L-SIG字段中的长度length 1701和/或奇偶校验比特parity bit1702异或到L-SIG后边的信令符号的循环冗余码CRC上去，即将L-SIG字段中的长度length 1701和/或奇偶校验比特parity bit1702同信令字段的CRC做异或操作，将异或后的结果放置在图17的长度异或CRC字段。
在本实施例中，即便当L-SIG字段中1比特parity bit发生了漏检(即L-SIG中出现了两个或者以上偶数bit的错误，1比特parity bit是无法检测出来的)，通过同CRC加扰或者异或，若Length发生了错误，会导致接收端在CRC处发生错误，因此会增加L-SIG的鲁棒性，减少漏检概率。
图18示出了上述实施例中一种数据发送装置1800可能的结构示意图，该装置1800可以配置成是前述WLAN通信系统100中的AP 103，该装置1800可以包括：处理器1802、计算机可读存储介质/存储器1803、收发器1804、输入设备1805和输出设备1806，以及总线1801。其中，处理器，收发器，计算机可读存储介质等通过总线连接。本申请实施例不限定上述部件之间的具体连接介质。
收发器1804可用于支持AP与上述实施例中的所述一个或多个第一STA之间进行通信，还支持AP与上述实施例中的所述一个或多个第二STA之间进行通信，可以执行图3至图15中涉及AP的收发过程和/或用于本申请所描述的技术的其他过程。例如，收发器1804可以用于至少在主信道上发送针对一个或多个第一STA的第一控制信息，且第一控制信息包含第一指示，收发器1804还可以用于在总信道的第一部分信道上发送针对一个或多个第一STA的第一数据分组，其中，第一数据分组中包含第二控制信息，以及，还可以用于在总信道的第二部分信道上发送针对一个或多个第二STA的第二数据分组。收发器1804还可以用于接收一个或多个第一STA基于第一触发信息在总信道的第一部分信道上发送的上行数据，还可以用于接收一个或多个第二STA基于第二触发信息在总信道的第二部分信道上发送的上行数据。当然，收发器1804还可以用于执行本申请所描述的技术的其他过程和方法。
处理器1802用于对上述AP的动作进行控制管理，用于执行上述实施例中由AP进行的处理，可以执行图3至图15中涉及AP的处理过程和/或用于本申请所描述的技术的其他过程，可以负责管理总线以及可以执行存储在存储器中的程序或指令。例如，处理器1802可以用于生成包含第一指示的第一控制信息。
计算机可读存储介质/存储器1803中保存有执行本申请技术方案的程序，指令或数据。例如，计算机可读存储介质/存储器1803可包含足以允许装置1800向一个或多个第一STA发送第一控制信息的指令，还可以包含足以允许装置1800在发送第一控制信息后，在总信道的第一部分信道上发送针对一个或多个第一STA的第一数据分组的指令，还可以包含足以允许装置1800在总信道的第二部分信道上发送针对一个或多个第二STA的第二数据分组的指令。
可以理解的是，图18仅仅示出了AP的简化设计，在实际应用中，AP可以包含任意数量的收发器，处理器，存储器等，而所有的可以实现本发明的AP都在本发明的保护范围之内。
图19示出了上述实施例中一种数据发送装置1900可能的结构示意图，该装置1900可以配置为前述WLAN通信系统100中的第一STA 101，该装置1900包括：处理器1902、计算机可读存储介质/存储器1903、收发器1904、输入设备1905和输出设备1906，以及总线1901。其中，处理器，收发器，计算机可读存储介质等通过总线连接。本申请实施例不限定上述部件之间的具体连接介质。
收发器1904可用于支持第一STA与上述AP之间进行通信，可以执行图3至图15中涉及第一STA的通信或交互过程和/或用于本申请所描述的技术的其他过程。例如，收发器1904可以用于接收由上述AP至少在主信道上发送的包含第一指示的第一控制信息，还可以用于在第一控制信息后，在总信道的第一部分信道上接收第一数据分组；收发器1904还可以用于在获取第一触发信息后，在总信道的第一部分信道上，采用第一触发信息所指示的资源单元向上述AP发送上行数据。
处理器1902用于对第一STA的动作进行控制管理，用于执行上述实施例中由第一STA进行的处理，可以执行图3至图15中涉及第一STA的处理过程和/或用于本申请所描述的技术的其他过程，可以负责管理总线以及可以执行存储在存储器中的程序或指令。例如，处理器1902可以用于结合第一控制信息和第二控制信息，获取资源调度信息，并第一数据分组的数据字段。
计算机可读存储介质/存储器1903中保存有执行本申请技术方案的程序，指令和数据。例如，计算机可读存储介质/存储器1903可包含足以允许装置1900接收由上述AP至少在主信道上接收包含第一指示的第一控制信息的指令，还可以包含足以允许装置1900在接收第一控制信息后，在总信道的第一部分信道上接收第一数据分组的指令，还可以包含足以允许装置1900根据第一控制信息在第一指示所指的一个或多个子信道上获取第二控制信息的指令，还可以包含足以允许装置1900根据第一控制信息和第二控制信息，获取资源调度信息的指令。
可以理解的是，图19仅仅示出了第一STA的简化设计，在实际应用中，第一STA可以包含任意数量的收发器，处理器，存储器等，而所有的可以实现本发明的第一STA都在本发明的保护范围之内。
上述装置1800和装置1900中涉及的处理器可以是通用处理器，例如通用中央处理器(CPU)、网络处理器(Network Processor，简称NP)、微处理器等，也可以是特定应用集成电路(application-specific integrated circBIt，简称ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。还可以是数字信号处理器(Digital Signal Processor，简称DSP)、现场可编程门阵列(Field-Programmable Gate Array，简称FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。控制器/处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。处理器通常是基于存储器内存储的程序指令来执行逻辑和算术运算。
上述涉及的计算机可读存储介质/存储器1803与计算机可读存储介质/存储器1903还可以保存有操作系统和其他应用程序。具体地，程序可以包括程序代码，程序代码包括计算机操作指令。更具体的，上述存储器可以是只读存储器(read-only memory，简称ROM)、可存储静态信息和指令的其他类型的静态存储设备、随机存取存储器(random access memory，简称RAM)、可存储信息和指令的其他类型的动态存储设备、磁盘存储器等等。存储器1803可以是上述存储类型的组合。并且上述计算机可读存储介质/存储器可以在处理器中，还可以在处理器的外部，或在包括处理器或处理电路的多个实体上分布。上述计算机可读存储介质/存储器可以具体体现在计算机程序产品中。举例而言，计算机程序产品可以包括封装材料中的计算机可读介质。
可以替换的，装置1800和装置1900也可配置成通用处理系统，例如通称为芯片，该通用处理系统包括:提供处理器功能的一个或多个微处理器；以及提供存储介质的至少一部分的 外部存储器，所有这些都通过外部总线体系结构与其它支持电路连接在一起。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于用户设备中。当然，处理器和存储介质也可以作为分立组件存在于用户设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (42)

  1. 一种接入点侧的数据传输方法，其特征在于，所述方法包括：
    接入点AP生成针对一个或多个第一站点STA的第一控制信息，其中，所述第一控制信息包括：第一指示，用于指示一个或多个子信道；
    所述AP至少在主信道上发送所述第一控制信息；
    所述AP在总信道的第一部分信道上发送针对所述一个或多个第一STA的第一数据分组，以及，同时，在所述总信道的第二部分信道上发送针对一个或多个第二站点STA的第二数据分组；
    所述第一数据分组包含针对所述一个或多个第一STA的第二控制信息；所述第一部分信道包含所述一个或多个子信道，且所述一个或多个子信道承载所述第二控制信息，所述第二部分信道包含所述主信道，所述第一部分信道与所述第二部分信道不重叠；
    所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息；
    其中，所述第一STA与所述第二STA具有不同的能力集。
  2. 一种站点侧的数据传输方法，其特征在于，所述方法包括：
    至少在主信道上接收针对一个或多个第一站点STA的第一控制信息，其中，所述第一控制信息包括：第一指示，用于指示一个或多个子信道；
    在总信道的第一部分信道上接收第一数据分组，其中，所述第一数据分组包含针对所述一个或多个第一STA的第二控制信息；所述第一部分信道包含所述一个或多个子信道，且所述一个或多个子信道承载所述第二控制信息；
    所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息；
    根据所述第一控制信息和所述第二控制信息，解析所述第一数据分组的数据字段。
  3. 根据权利要求1或2中所述的方法，其特征在于，所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息，具体为：所述第一控制信息还包括：针对所述一个或多个第一STA中的第一部分第一STA的资源调度信息；所述第二控制信息包括：针对所述一个或多个第一STA中的第二部分第一STA的资源调度信息。
  4. 根据权利要求1或2中所述的方法，其特征在于，所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息，具体为：所述第一控制信息和所述第二控制信息中的至少一个还包括：针对所述一个或多个第一STA的资源调度信息。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述针对所述一个或多个第一STA的资源调度信息包括：所述一个或多个第一STA的资源单元分配信息，以及，所述一个或多个第一STA的站点信息。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述第一控制信息还包括：第二指示，用于指示所述第一控制信息后的主信道上没有承载所述一个或多个第一STA的数据。
  7. 根据权利要求6所述的方法，其特征在于，所述第一控制信息还包括：针对所述主信道的资源调度信息，所述主信道的资源调度信息包括资源单元分配信息和所述主信道上被调度的站点的信息，其中，所述主信道上被调度的站点的信息包括关联标识符AID；
    所述第二指示包括：所述主信道的资源单元分配信息指示主信道上分配给所述一个或多个第一STA的资源单元为空；或者，所述主信道上被调度的站点的AID为预留值。
  8. 根据权利要求1或2所述的方法，其特征在于，当所述一个或多个子信道为两个子信道时，所述第一指示包含：所述两个子信道中第一个子信道的子信道索引和所述两个子信道中的第二个子信道的子信道索引。
  9. 根据权利要求1或2所述的方法，其特征在于，所述第一指示还用于指示总信道的带宽，其中，所述总信道至少包含所述主信道和所述一个或多个子信道。
  10. 根据权利要求1所述的方法，其特征在于，所述第一数据分组数据字段的符号长度与所述第二数据分组数据字段的符号长度相同。
  11. 根据权利要求1所述的方法，其特征在于，所述第一数据分组的数据字段包含第一触发信息，所述第二数据分组的数据字段包含第二触发信息；
    其中，所述第一触发信息用于触发所述一个或多个第一STA在所述总信道的第一部分信道上进行上行数据传输；所述第二触发信息用于触发所述一个或多个第二STA在所述总信道的第二部分信道上进行上行数据传输。
  12. 根据权利要求2所述的方法，其特征在于，所述第一数据分组的数据字段包含第一触发信息，其中，所述第一触发信息用于触发所述一个或多个第一STA在所述总信道的第一部分信道上进行上行数据传输。
  13. 一种接入点侧数据传输方法，其特征在于，所述方法包括：
    接入点AP生成第一数据分组和第二数据分组；
    所述接入点AP在总信道的第一部分信道上发送针对一个或多个第一站点STA的所述第一数据分组，并在总信道上除第一部分信道外的第二部分信道上发送针对一个或多个第二站点STA的所述第二数据分组；所述第二部分信道至少包含主信道，所述第一部分信道包括一个或多个从信道；所述第一STA与所述第二STA具有不同的能力集；
    其中，所述第二数据分组包含相邻的两个信令字段，所述相邻的两个信令字段符号内的4个子载波上携带用于向所述第一STA指示所述第一部分信道的信息。
  14. 一种站点侧数据传输方法，其特征在于，所述方法包括：
    第一站点STA在包含主信道的第二部分信道上接收第二数据分组，其中，所述第二数据分组包含相邻的两个信令字段，所述相邻的两个信令字段符号内的4个子载波上携带用于向所述第一STA指示第一部分信道的信息；所述第一部分信道包括一个或多个从信道；
    所述第一STA根据所述相邻的两个信令字段符号内的4个子载波上携带的信息确定所述第一部分信道；
    所述第一STA在所述第一部分信道上接收第一数据分组。
  15. 根据权利要求13或14所述的方法，其特征在于，所述指示第一部分信道的信息，包括：所述相邻的两个信令字段的第一个信令字段符号内的4个子载波上携带第一数值集，和，所述相邻的两个信令字段的第二个信令字段符号内的4个子载波上携带第二数值集。
  16. 根据权利要求13至15中任一项所述的方法，其特征在于，所述4个子载波的子载波索引为[-28,-27,27,28]。
  17. 根据权利要求15或16所述的方法，其特征在于，所述第一数值集与所述第二数值集中至多有一个是[-1,-1,-1,1]，且所述第一数值集与所述第二数值集不同。
  18. 根据权利要求15至17中任一项所述的方法，其特征在于，第一STA确定所述第一部分信道，包括：
    第一STA对所述第一信令字段符号内的4个子载波进行信道估计，解调得到第三数值集；
    所述第一STA判断所述第三数值集是否等于所述第二数值集；
    若所述第三数值集等于所述第二数值集，所述第一STA确定所述第二数据分组的第二部分信道的带宽，并确定所述第一部分信道。
  19. 根据权利要求15至17中任一项所述的方法，其特征在于，第一STA确定所述第一部分信道，包括：
    所述第一STA计算所述第一信令字段符号内的4个子载波上传输的数值集和所述第二信令字段符号内的4个子载波传输的数值集的差分结果；
    判断所述差分结果是否为0或大于等于预设门限值；
    若所述差分结果大于0或大于等于预设门限值，所述第一STA确定所述第二数据分组的第二部分信道的带宽，并确定所述第一部分信道。
  20. 一种接入点侧数据通信装置，其特征在于，所述装置包括：
    处理器，用于生成针对一个或多个第一站点STA的第一控制信息，其中，所述第一控制信息包括：第一指示，用于指示一个或多个子信道；
    收发器，用于至少在主信道上发送所述第一控制信息；
    所述收发器，还用于在总信道的第一部分信道上发送针对所述一个或多个第一STA的第一数据分组，以及，同时，在所述总信道的第二部分信道上发送针对一个或多个第二站点STA的第二数据分组；
    所述第一数据分组包含针对所述一个或多个第一STA的第二控制信息；所述第一部分信道包含所述一个或多个子信道，且所述一个或多个子信道承载所述第二控制信息，所述第二 部分信道包含所述主信道，所述第一部分信道与所述第二部分信道不重叠；
    所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息；
    其中，所述第一STA与所述第二STA具有不同的能力集。
  21. 一种站点侧的数据通信装置，其特征在于，所述装置包括：
    收发器，用于至少在主信道上接收针对一个或多个第一站点STA的第一控制信息，其中，所述第一控制信息包括：第一指示，用于指示一个或多个子信道；
    所述收发器，还用于在总信道的第一部分信道上接收第一数据分组，其中，所述第一数据分组包含针对所述一个或多个第一STA的第二控制信息；所述第一部分信道包含所述一个或多个子信道，且所述一个或多个子信道承载所述第二控制信息；
    所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息；
    处理器，用于根据所述第一控制信息和所述第二控制信息，解析所述第一数据分组的数据字段。
  22. 根据权利要求20或21中所述的装置，其特征在于，所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息，具体为：所述第一控制信息还包括：针对所述一个或多个第一STA中的第一部分第一STA的资源调度信息；所述第二控制信息包括：针对所述一个或多个第一STA中的第二部分第一STA的资源调度信息。
  23. 根据权利要求20或21中所述的装置，其特征在于，所述第一控制信息和/或所述第二控制信息还包含针对所述一个或多个第一STA的资源调度信息，具体为：所述第一控制信息和所述第二控制信息中的至少一个还包括：针对所述一个或多个第一STA的资源调度信息。
  24. 根据权利要求20至23中任一项所述的装置，其特征在于，所述针对一个或多个第一STA的资源调度信息包括：所述一个或多个第一STA的资源单元分配信息，以及，所述一个或多个第一STA的站点信息。
  25. 根据权利要求20至24中任一项所述的装置，其特征在于，所述第一控制信息还包括：第二指示，用于指示所述第一控制信息后的主信道上没有承载所述一个或多个第一STA的数据。
  26. 根据权利要求25所述的装置，其特征在于，所述第一控制信息还包括：针对所述主信道的资源调度信息，所述主信道的资源调度信息包括资源单元分配信息和所述主信道上被调度的站点的信息，其中，所述主信道上被调度的站点的信息包括关联标识符AID；
    所述第二指示包括：所述主信道的资源单元分配信息指示主信道上分配给所述一个或多个第一STA的资源单元为空；或者，所述主信道上被调度的站点的AID为预留值。
  27. 根据权利要求20或21所述的装置，其特征在于，当所述一个或多个子信道为两个 子信道时，所述第一指示包含：所述两个子信道中第一个子信道的子信道索引和所述两个子信道中的第二个子信道的子信道索引。
  28. 根据权利要求20或21所述的装置，其特征在于，所述第一指示还用于指示总信道的带宽，其中，所述总信道至少包含所述主信道和所述一个或多个子信道。
  29. 根据权利要求20所述的装置，其特征在于，所述第一数据分组数据字段的符号长度与所述第二数据分组数据字段的符号长度相同。
  30. 根据权利要求20所述的装置，其特征在于，所述第一数据分组的数据字段包含第一触发信息，所述第二数据分组的数据字段包含第二触发信息；
    其中，所述第一触发信息用于触发所述一个或多个第一STA在所述总信道的第一部分信道上进行上行数据传输；所述第二触发信息用于触发所述一个或多个第二STA在所述总信道的第二部分信道上进行上行数据传输。
  31. 根据权利要求21所述的装置，其特征在于，所述第一数据分组的数据字段包含第一触发信息，其中，所述第一触发信息用于触发所述一个或多个第一STA在所述总信道的第一部分信道上进行上行数据传输。
  32. 一种接入点侧数据通信装置，其特征在于，所述装置包括：
    处理器，生成第一数据分组和第二数据分组；
    收发器，用于在总信道的第一部分信道上发送针对一个或多个第一站点STA的所述第一数据分组，并在总信道上除第一部分信道外的第二部分信道上发送针对一个或多个第二站点STA的所述第二数据分组；
    所述第二部分信道至少包含主信道，所述第一部分信道包括一个或多个从信道；所述第一STA与所述第二STA具有不同的能力集；所述第二数据分组包含相邻的两个信令字段，所述相邻的两个信令字段符号内的4个子载波上携带用于向所述第一STA指示所述第一部分信道的信息。
  33. 一种站点侧数据通信装置，其特征在于，所述装置包括：
    收发器，用于在包含主信道的第二部分信道上接收第二数据分组，其中，所述第二数据分组包含相邻的两个信令字段，所述相邻的两个信令字段符号内的4个子载波上携带用于向所述装置指示第一部分信道的信息；所述第一部分信道包括一个或多个从信道；
    处理器，用于根据所述相邻的两个信令字段符号内的4个子载波上携带的信息确定所述第一部分信道；
    所述收发器，还用于在所述第一部分信道上接收第一数据分组。
  34. 根据权利要求32或33所述的通信装置，其特征在于，所述指示第一部分信道的信息，包括：所述相邻的两个信令字段的第一个信令字段符号内的4个子载波上携带第一数值集，和，所述相邻的两个信令字段的第二个信令字段符号内的4个子载波上携带第二数值集。
  35. 根据权利要求32至34中任一项所述的装置，其特征在于，所述4个子载波的子载波索引为[-28,-27,27,28]。
  36. 根据权利要求34或35所述的装置，其特征在于，所述第一数值集与所述第二数值集中至多有一个是[-1,-1,-1,1]，且所述第一数值集与所述第二数值集不同。
  37. 根据权利要求34至36中任一项所述的装置，其特征在于，所述处理器具体还用于：
    对所述第一信令字段符号内的4个子载波进行信道估计，解调得到第三数值集；
    判断所述第三数值集是否等于所述第二数值集；
    若所述第三数值集等于所述第二数值集，确定所述第二数据分组的第二部分信道的带宽，并确定所述第一部分信道。
  38. 根据权利要求34至36中任一项所述的装置，其特征在于，所述处理器具体还用于：
    计算所述第一信令字段符号内的4个子载波上传输的数值集和所述第二信令字段符号内的4个子载波传输的数值集的差分结果；
    判断所述差分结果是否为0或大于等于预设门限值；
    若所述差分结果大于0或大于等于预设门限值，确定所述第二数据分组的第二部分信道的带宽，并确定所述第一部分信道。
  39. 一种通信装置，其特征在于，该装置包括处理器和存储器，所述存储器用于存储程序，所述处理器用于执行存储器中的程序以执行权利要求1至19中任一项所述的方法。
  40. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当所述指令在计算机上运行时，使得所述计算机可以执行权利要求1至19中任一项所述的方法。
  41. 一种计算机程序产品，其特征在于，所述计算机程序产品包括用于执行所述权利要求1至19中任一项所述的方法的指令。
  42. 一种装置，用于实现权利要求1至19中任一项所述的方法。
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