WO2019179273A1 - 一种数据传输方法及装置 - Google Patents

一种数据传输方法及装置 Download PDF

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Publication number
WO2019179273A1
WO2019179273A1 PCT/CN2019/075496 CN2019075496W WO2019179273A1 WO 2019179273 A1 WO2019179273 A1 WO 2019179273A1 CN 2019075496 W CN2019075496 W CN 2019075496W WO 2019179273 A1 WO2019179273 A1 WO 2019179273A1
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WIPO (PCT)
Prior art keywords
data frame
pilot sequence
pilot
ofdm symbols
sequence
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PCT/CN2019/075496
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English (en)
French (fr)
Inventor
淦明
陈特彦
梁丹丹
左鑫
吴涛
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华为技术有限公司
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Priority to EP19770898.5A priority Critical patent/EP3761585A4/en
Publication of WO2019179273A1 publication Critical patent/WO2019179273A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/261Details of reference signals
    • H04L27/2613Structure of the reference signals
    • H04L27/26132Structure of the reference signals using repetition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40Circuits
    • H04B1/50Circuits using different frequencies for the two directions of communication
    • H04B1/52Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/261Details of reference signals
    • H04L27/2611
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2626Arrangements specific to the transmitter only
    • H04L27/2627Modulators
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.
  • Full duplex (FD) technology refers to communication nodes transmitting and receiving data at the same time and on the same frequency resource.
  • communication nodes A and B each include a transmitter and a receiver, and the transmitter in A and the receiver in B are connected by a data line, and the receiver in A and the transmitter in B are also Through the data line connection, the data transmitted and received between A and B can be simultaneously transmitted on the same wireless channel, thereby improving the utilization efficiency of the wireless spectrum and solving the problem of scarcity of wireless spectrum resources.
  • the local transmitter since full duplex uses the same time-frequency resource to send and receive data, the local transmitter generates a self-interference signal to the local receiver, thereby affecting the reception of the signal from the local receiver to another communication node, that is, the signal received by the receiver. Will be contaminated by self-interference signals.
  • the antenna interference suppression suppresses the interference of the transmitter signal to the receiver signal by increasing the isolation between the transmitting antenna and the receiving antenna;
  • the radio frequency interference canceling method is to modulate the RF signal of the local transmitter to the same amplitude as the receiver, The opposite phase is combined with the receiver signal to cancel the self-interference;
  • the digital baseband interference cancellation method utilizes the transmitter baseband signal to eliminate the transmitter signal in the receiver signal by data signal processing techniques.
  • the embodiment of the present application provides a data transmission method and device, which solves the problem that the residual self-interference signal in the existing full-duplex communication technology causes pollution to the received signal, resulting in a low signal-to-noise ratio of the received signal.
  • a data transmission method comprising: transmitting a first data frame on a same time-frequency resource, and receiving a second data frame;
  • a data frame and a second data frame each include a plurality of OFDM symbols, that is, the first data frame and the second data frame are both OFDM modulated, and the pilot sequence used in the OFDM symbol in the first data frame and the second data frame
  • the pilot sequences employed by the OFDM symbols are orthogonal to each other.
  • the pilot sequence has a length of 2
  • the mutually orthogonal pilot sequences include a first pilot sequence and a second pilot sequence, where the first pilot sequence is [1 1 ], the second pilot sequence is any one of the following: [1 -1], [-1 1].
  • the length of the pilot sequence is 2
  • the influence of the self-interference signal generated by the first data frame on the received signal corresponding to the second data frame is improved, and the received signal corresponding to the second data frame is improved.
  • Signal to noise ratio when the length of the pilot sequence is 2, the influence of the self-interference signal generated by the first data frame on the received signal corresponding to the second data frame is improved, and the received signal corresponding to the second data frame is improved. Signal to noise ratio.
  • the pilot sequence has a length of 4, and the mutually orthogonal pilot sequences include a first pilot sequence and a second pilot sequence, where the first pilot sequence is [ 1 1 1 -1], the second pilot sequence is any one of the following: [1 1 -1 1], [1 -1 1 1], [1 -1 -1 -1], [-1 1 1 1], [-1 1 -1 -1], [-1 -1 1 -1].
  • the length of the pilot sequence is 4, the influence of the self-interference signal generated by the first data frame on the received signal corresponding to the second data frame may be improved, and the received signal corresponding to the second data frame is improved. Signal to noise ratio.
  • the pilot sequence has a length of six, and the mutually orthogonal pilot sequences include a first pilot sequence and a second pilot sequence, where the first pilot sequence is [1 1 1 -1 -1 1], the second pilot sequence is any one shown in Table 1 of the specification.
  • the length of the pilot sequence is 6
  • the influence of the self-interference signal generated by the first data frame on the received signal corresponding to the second data frame may be improved, and the received signal corresponding to the second data frame is improved. Signal to noise ratio.
  • the pilot sequence has a length of 8, and the mutually orthogonal pilot sequences include a first pilot sequence and a second pilot sequence, where the first pilot sequence is [1 1 1 -1 -1 1 1], the second pilot sequence is any one of those shown in Table 2 of the specification.
  • the length of the pilot sequence is 6
  • the influence of the self-interference signal generated by the first data frame on the received signal corresponding to the second data frame may be improved, and the received signal corresponding to the second data frame is improved. Signal to noise ratio.
  • the pilot sequence has a length of 16, and the mutually orthogonal pilot sequences include a first pilot sequence and a second pilot sequence, where the first pilot sequence is [1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1], the second pilot sequence is any one of those shown in Table 3 of the specification.
  • the length of the pilot sequence is 16
  • the influence of the self-interference signal generated by the first data frame on the received signal corresponding to the second data frame is improved, and the received signal corresponding to the second data frame is improved. Signal to noise ratio.
  • the pilot sequence has a length of 24, and the mutually orthogonal pilot sequences include a first pilot sequence and a second pilot sequence, where the first pilot sequence is [1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 -1 -1 1 1], the second pilot sequence is any one shown in Table 4 of the specification.
  • the length of the pilot sequence is 24, the influence of the self-interference signal generated by the first data frame on the received signal corresponding to the second data frame may be improved, and the received signal corresponding to the second data frame is improved. Signal to noise ratio.
  • the pilot sequence has a length of 32
  • the mutually orthogonal pilot sequences include a first pilot sequence and a second pilot sequence
  • the first pilot sequence is [1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 -1 -1 1 1]
  • the second pilot sequence is Table 5 in the specification Any of the ones shown.
  • the length of the pilot sequence is 32
  • the influence of the self-interference signal generated by the first data frame on the received signal corresponding to the second data frame is improved, and the received signal corresponding to the second data frame is improved. Signal to noise ratio.
  • the first data frame is aligned with the second data frame, that is, the first data frame is aligned with the start position and the end position of the second data frame.
  • the first data frame has the same length as the cyclic prefix of the two OFDM symbols at the same position in the second data frame.
  • the first data frame is the same as the subcarrier spacing of the two OFDM symbols at the same position in the second data frame.
  • the first data frame is the same as the start time of two OFDM symbols at the same position in the second data frame.
  • the phase corresponding to the signal corresponding to the first data frame and the signal corresponding to the second data frame may be the same, that is, the phase of the self-interference signal and the received signal are the same, thereby improving the elimination of the self-interference signal. Effectiveness, which in turn increases the signal-to-noise ratio of the received signal.
  • a data transmission method is provided, the method being applied to a device supporting full-duplex communication, the method comprising: transmitting a first data frame on a same time-frequency resource, and receiving a second data frame;
  • a data frame and a second data frame each include a plurality of OFDM symbols, and the first data frame is aligned with the second data frame, that is, the first data frame is aligned with the start position and the end position of the second data frame.
  • the phase corresponding to the signal corresponding to the first data frame and the signal corresponding to the second data frame may be the same, that is, the phase of the self-interference signal and the received signal are the same, thereby improving the effectiveness of eliminating the self-interference signal, and further Improve the signal to noise ratio of the received signal.
  • the first data frame has the same length as the cyclic prefix of the two OFDM symbols at the same position in the second data frame.
  • the first data frame is the same as the subcarrier spacing of the two OFDM symbols at the same position in the second data frame.
  • the first data frame is the same as the start time of two OFDM symbols at the same position in the second data frame.
  • a data transmission apparatus in a third aspect, is provided, the data transmission apparatus supporting full duplex communication, and the data transmission apparatus can implement data transmission provided by any one of the possible implementations of the first aspect to the first aspect
  • the function of the method may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more corresponding units of the above functions.
  • the data transmission device may include a transmitting unit and a receiving unit.
  • the data transmission device includes a processor, a memory, a communication interface, and a bus, where the processor, the memory, and the communication interface are connected by using the bus .
  • the memory is for storing program code, when the program code is executed by the processor, causing the data transmission device to perform the data transmission method provided by any one of the possible implementations of the first aspect to the first aspect A step of.
  • a data transmission apparatus in a fourth aspect, is provided, the data transmission apparatus supporting full-duplex communication, and the data transmission apparatus can implement data transmission provided by any one of the possible implementations of the second aspect to the second aspect
  • the function of the method may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more corresponding units of the above functions.
  • the data transmission device may include a transmitting unit and a receiving unit.
  • the data transmission device includes a processor, a memory, a communication interface, and a bus, where the processor, the memory, and the communication interface are connected by using the bus .
  • the memory is for storing program code, when the program code is executed by the processor, causing the data transmission device to perform the data transmission method provided by any one of the possible implementations of the second aspect to the second aspect A step of.
  • a computer readable storage medium stores instructions that, when run on a computer, cause the computer to perform any of the first aspect or the first aspect described above A possible implementation of the data transfer method provided.
  • a computer readable storage medium stores instructions that, when run on a computer, cause the computer to perform any of the second aspect or the second aspect described above A possible implementation of the data transfer method provided.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the data transmission method provided by any of the first aspect or any of the possible implementations of the first aspect.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the data transfer method provided by any of the possible implementations of the second aspect or the second aspect.
  • 1 is a schematic diagram of a full duplex communication
  • FIG. 2 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of another communication system according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of scheduling information according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of data transmission between devices according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an FD trigger frame according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of data transmission between another device according to an embodiment of the present application.
  • FIG. 9 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a first data transmission apparatus according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a second data transmission apparatus according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a third data transmission apparatus according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a fourth data transmission apparatus according to an embodiment of the present application.
  • Full duplex (FD) technology means that a node can transmit and receive data on the same time-frequency resource, that is, transmit and receive data at the same time and on the same frequency resource.
  • the same time-frequency resource in the embodiment of the present application may be that the resource for transmitting and receiving data includes the same time slot or symbol in the time domain, and includes the same sub-carrier in the frequency domain.
  • the embodiment of the present application is applicable to data communication between a node supporting full-duplex communication and another one or more nodes, and the wireless communication scenario involved may include: an access point (AP) and a station (station, STA) Communication between the AP, communication between the AP and the AP, communication between the STA and the STA, and the like.
  • AP access point
  • STA station
  • the AP can support full-duplex communication
  • the STA can support half-duplex communication or full-duplex communication.
  • the AP can be connected with two STAs.
  • For communication such as the wireless communication system shown in Figure 2, the AP supports full-duplex communication, STA 1 and STA 2 both support half-duplex communication, and the AP simultaneously communicates with STA1 and STA2), when the STA supports full-duplex communication.
  • the communication scenario between the AP and the STA may be as shown in FIG. 3 or as shown in FIG. 2 (the STA does not perform the full duplex capability at this time).
  • one of the APs can support full-duplex communication, and the other or two APs can support half-duplex communication or full-duplex communication; communication between the STA and the STA One of the STAs can support full-duplex communication, and the other or two STAs can support half-duplex communication or full-duplex communication.
  • the communication between the AP and the STA is mainly taken as an example for description.
  • the AP and the STA may be communication servers, routers, switches, bridges, computers, mobile phones, portable devices, wearable devices, and the like.
  • the difference between the AP and the STA is that the AP can provide a wireless access service, allow other wireless devices to access, and provide data access; the STA can also be called a wireless terminal, and does not accept wireless access itself, it can be connected to AP.
  • FIG. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present application. The method is applied to a device supporting full-duplex communication, and the method includes the following steps.
  • Step 401 The device sends a first data frame on the same time-frequency resource, and receives the second data frame.
  • the first data frame and the second data frame are both OFDM modulated, and the pilot sequence used by the OFDM symbol in the first data frame and the pilot sequence used in the OFDM symbol in the second data frame are orthogonal to each other.
  • the device may be an AP or an STA.
  • the communication between the AP and the STA is taken as an example.
  • the first data frame and the second data frame may be data that is communicated between the AP and one STA.
  • the AP sends the first data frame to the STA1 on the same time-frequency resource, and the receiving is from The second data frame of STA1; correspondingly, for STA1, STA1 receives the first data frame from the AP on the time-frequency resource, and sends the second data frame to the AP.
  • the first data frame and the second data frame may be data that is communicated between the AP and the two STAs.
  • the AP sends the first data frame to the STA1 on the same time-frequency resource, and Receiving a second data frame from STA2; correspondingly, for STA1, STA1 receives the first data frame from the AP on the time-frequency resource, and for STA2, STA2 sends the second data frame to the AP on the time-frequency resource. .
  • first data frame and the second data frame each include a plurality of OFDM symbols, which means that the first data frame and the second data frame are both OFDM modulated, and a plurality of OFDM symbols are obtained after modulation.
  • the frequency domain corresponding to each OFDM symbol in the first data frame and the second data frame may include a plurality of subcarriers, and a part of the plurality of subcarriers may be used to transmit a pilot sequence.
  • the communication between the device and the device may adopt different bandwidths.
  • the number of subcarriers included in the frequency domain corresponding to the OFDM symbol in the data frame is different.
  • the bandwidth used by the device for communication may include: 20 MHz, 40 MHz, 80 MHz, and 160 MHz bandwidth.
  • the OFDM symbols in the data frame of each bandwidth transmission may include a plurality of subcarriers, and the number of the multiple subcarriers is related to the size of the subcarrier spacing in the OFDM symbol.
  • the OFDM symbol in the data frame transmitted in the 20 MHz bandwidth may include 64 subcarriers; when the subcarrier spacing in the OFDM symbol is 78.125 kHz, the data frame transmitted in the 20 MHz bandwidth
  • the OFDM symbol in the middle may include 256 subcarriers.
  • the communication system may also aggregate consecutive multiple subcarriers to form a resource block (for example, aggregate N consecutive subcarriers to form an N resource block, and N may represent the number of subcarriers included in the resource block).
  • the resource blocks are allocated to the device for transmitting data, that is, the device can also communicate with the resource blocks.
  • 802.11ax divides the 20M, 40M, 80M, and 160M bandwidths into the following multiple resource blocks: 26 resource blocks, 52 resource blocks, 106 resource blocks, 242 resource blocks, 484 resource blocks, 996 resource blocks, and 1992 resource blocks. Where the subcarrier spacing is 78.125 KHz.
  • the length of the pilot sequence used by the OFDM symbols in the data frame may also be different.
  • two pilot sequences that are orthogonal to each other are a first pilot sequence and a second pilot sequence, respectively, and the first pilot sequence may be a pilot sequence used by an OFDM symbol in a first data frame,
  • the second pilot sequence may be a pilot sequence used by the OFDM symbol in the second data frame; or the first pilot sequence is a pilot sequence used by the OFDM symbol in the second data frame, and the second pilot sequence is the first
  • the pilot sequence used in the OFDM symbol in the data frame is not specifically limited in this embodiment of the present application.
  • the length of the first pilot sequence and the second pilot sequence is 2, and the first pilot sequence may be [1 -1], and the second The pilot sequence can be any of [1 1] or [-1 -1].
  • the length of the first pilot sequence and the second pilot sequence is 4, and the first The pilot sequence can be [1 1 1 -1], and the second pilot sequence can be [1 1 -1 1], [1 -1 1 1], [1 -1 -1 -1], [-1 1 Any of 1 1], [-1 1 -1 -1], or [-1 -1 1 -1].
  • the 20 MHz bandwidth with a subcarrier spacing of 312.5 kHz is a non-OFDMA resource block.
  • the device when the device communicates with a 40 MHz bandwidth with a subcarrier spacing of 312.5 kHz, the length of the first pilot sequence and the second pilot sequence is 6, and the first pilot sequence may be [1] 1 1 -1 -1 1], the second pilot sequence may be any of the following Table 1.
  • the 40 MHz bandwidth with a subcarrier spacing of 312.5 kHz is a non-OFDMA resource block.
  • the device when the device communicates with an 242 resource block or an 80 MHz bandwidth with a subcarrier spacing of 312.5 kHz, the length of the first pilot sequence and the second pilot sequence is 8, and the first pilot sequence It may be [1 1 1 -1 -1 1 1], and the second pilot sequence may be any of the following Table 2.
  • the 80 MHz bandwidth with a subcarrier spacing of 312.5 kHz is a non-OFDMA resource block.
  • the length of the first pilot sequence and the second pilot sequence is 16, the first pilot.
  • the sequence is [1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1]
  • the second pilot sequence is any one of the following Table 3, that is, the 484 resource block or the 160 MHz bandwidth corresponds to
  • the first pilot sequence and the second pilot sequence are both repetitions of the first pilot sequence and the second pilot sequence corresponding to the 242 resource block.
  • the 160 MHz bandwidth with a subcarrier spacing of 312.5 kHz is a non-OFDMA resource block.
  • the length of the first pilot sequence and the second pilot sequence is 24, and the first pilot sequence is [1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1-1 1 1]
  • the second pilot sequence is any one of the following Table 4, that is, the first pilot corresponding to the 996 resource block
  • the sequence and the second pilot sequence are both a repetition of the first pilot sequence corresponding to the 242 resource block and the third pilot sequence.
  • the length of the first pilot sequence and the second pilot sequence is 32, and the first pilot sequence is [1 1 1 -1 -1 1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1]
  • the second pilot sequence is any one of the following Table 5, That is, the first pilot sequence and the second pilot sequence corresponding to the 1996 resource block are four repetitions of the first pilot sequence and the second pilot sequence corresponding to the 242 resource block.
  • the first data frame is aligned with the second data frame.
  • the alignment of the first data frame with the second data frame may mean that the start position and the end position of the first data frame are the same as the start position and the end position of the second data frame.
  • the plurality of OFDM symbols included in the first data frame are in a one-to-one relationship with the plurality of OFDM symbols included in the second data frame, or two or more OFDM symbols and the second data in the first data frame.
  • One OFDM symbol in the frame is aligned, or one OFDM symbol in the first data frame is aligned with two or more OFDM symbols in the second data frame.
  • Multiple OFDM symbols may be included in the same data frame, and multiple OFDM symbols may be included in each OFDM symbol.
  • the parameters of the OFDM symbols in different segments of the same data frame may be different, such as subcarrier spacing, cyclic prefix length, but the parameters of the OFDM symbols in the same segment are the same.
  • the transmission time of each OFDM symbol may include a partial OFDM symbol time and a cyclic prefix time, and a partial OFDM symbol time may be determined by a subcarrier spacing.
  • the first data frame has the same length as the cyclic prefix of the two OFDM symbols at the same position in the second data frame, for example, the length of the cyclic prefix is 0.4us, 0.8us, 1.6us, or 3.2us, etc.;
  • the data frame is the same as the subcarrier spacing of the two OFDM symbols at the same position in the second data frame, for example, the subcarrier spacing is 78.125 KHz, and the length of the partial OFDM symbol is 3.2 us, 6.4 us, or 12.8 us, etc.;
  • the frame has the same start time as the two OFDM symbols at the same position in the second data frame, and accordingly, the end times of the two OFDM symbols are also the same. At this time, the number of the plurality of OFDM symbols included in the first data frame is equal to the number of the plurality of OFDM symbols included in the second data frame.
  • the length of each of the first 10 OFDM symbols in the first data frame is 4 us, and the length of each OFDM symbol in the subsequent OFDM symbols is 16 us; accordingly, according to the alignment of two OFDM symbols at the same position
  • the length of each OFDM symbol in the first 10 OFDM symbols in the second data frame is also 4 us, and the length of each OFDM symbol in the subsequent OFDM symbols is also 16 us.
  • the device may further send, to the STA, pilot sequence indication information, where the pilot sequence indication information may be used to indicate the OFDM symbol used in the data frame sent by the STA. Pilot sequence.
  • the AP may send pilot sequence indication information to the STA, where the pilot sequence indication information may be used to indicate the STA.
  • the pilot sequence indication information may be used to indicate STA usage
  • the second pilot sequence in this case, the AP may use the first pilot sequence
  • the pilot sequence used by the AP to indicate the first pilot sequence, thereby ensuring that the pilot sequences used by the AP and the STA are orthogonal to each other.
  • the AP may also send, to the STA, indication information indicating whether to use mutually orthogonal pilot sequences. For example, when the AP uses the first pilot sequence, the AP may indicate, by using the indication information, that the STA uses the second pilot. The sequence may also indicate that the STA does not use the second pilot sequence.
  • the AP may also send scheduling information to each STA, where the scheduling information may be used to schedule uplink data and downlink data.
  • the scheduling information may include frame control, duration/identification field, uplink sender MAC address, downlink receiver MAC address (optional occurrence), uplink ACK transmission time (optional), and downlink. ACK transmission time (optional), sender address, and frame check field.
  • two STAs include STA1 and STA2, and the AP sends downlink data to STA1 and receives uplink data from STA2 as an example.
  • the uplink sender MAC address may be the STA2 MAC address, and the downlink receiver MAC address may be STA1.
  • the MAC address, the uplink ACK transmission time may refer to the time when the AP sends a response message to the STA2, and the downlink ACK transmission time may refer to the time when the STA1 sends a response message to the AP, and the sender address may refer to the MAC address of the AP.
  • the AP sends the scheduling information.
  • the STA2 can send the uplink data to the AP by using the short inter-frame space (SIFS) time.
  • the AP sends the downlink data to the STA1.
  • the AP and the STA1 may send a corresponding response message according to the uplink ACK transmission time and the downlink ACK transmission time in the scheduling information.
  • the communication diagram between the AP and the STA1 and the STA2 may be as shown in FIG. 6.
  • the DL ACK indicates a response message of the downlink data
  • the UL ACK indicates a response message of the uplink data.
  • the AP may also send a full duplex (FD) trigger frame to the STA, where the FD trigger frame may be used for scheduling.
  • FD full duplex
  • the FD trigger frame may include a frame control, a duration/identification field, an uplink sender MAC address, a downlink receiver MAC address, an uplink ACK transmission time, a downlink ACK transmission time, a sender address, and a frame.
  • the FD trigger frame mentioned above may also be modified based on the trigger frame in the 802.11ax protocol, and the above mentioned field but not included in the trigger frame in the 802.11ax is added.
  • the AP sends the FD trigger frame.
  • the STA can send the uplink data to the AP at the SIFS time.
  • the AP sends the downlink data to the STA.
  • the AP and the STA may send a corresponding response message according to the uplink ACK transmission time and the downlink ACK transmission time in the FD trigger frame.
  • the communication diagram between the AP and the STA may be as shown in FIG. 8.
  • the DL ACK indicates a response message of the downlink data
  • the UL ACK indicates a response message of the uplink data.
  • the first data frame sent by the AP may be a downlink data frame
  • the received second data frame may be an uplink data frame
  • the first data frame sent by the STA may be an uplink data frame
  • the received second data frame may be a downlink data frame
  • the device supporting the full duplex communication may send the first data frame on the same time-frequency resource, and receive the second data frame, and the pilot sequence and the OFDM symbol used in the first data frame are used.
  • the pilot sequences used in the OFDM symbols in the two data frames are orthogonal to each other. Since the inner products of the two pilot sequences that are orthogonal to each other are zero, the self-interference signal generated by the first data frame can be reduced to correspond to the second data frame. The effect of the received signal, which in turn increases the signal-to-noise ratio of the received signal.
  • the first data frame is aligned with the second data frame, so that the phase of the signal corresponding to the first data frame and the signal corresponding to the second data frame are the same, that is, the phase of the self-interference signal and the received signal are the same, thereby improving the elimination.
  • the effectiveness of the self-interference signal which in turn increases the signal-to-noise ratio of the received signal.
  • FIG. 9 is a schematic flowchart of a data transmission method according to an embodiment of the present disclosure. The method is applied to a device supporting full-duplex communication, and the method includes the following steps.
  • Step 901 The device sends a first data frame on the same time-frequency resource, and receives the second data frame.
  • the first data frame and the second data frame each include a plurality of OFDM symbols, and the first data frame is aligned with the second data frame.
  • the device may be an AP or an STA.
  • the communication between the AP and the STA is taken as an example.
  • the first data frame and the second data frame may be data that is communicated between the AP and one STA.
  • the AP sends the first data frame to the STA1 on the same time-frequency resource, and the receiving is from The second data frame of STA1; correspondingly, for STA1, STA1 receives the first data frame from the AP on the time-frequency resource, and sends the second data frame to the AP.
  • the first data frame and the second data frame may be data that is communicated between the AP and the two STAs.
  • the AP sends the first data frame to the STA1 on the same time-frequency resource, and Receiving a second data frame from STA2; correspondingly, for STA1, STA1 receives the first data frame from the AP on the time-frequency resource, and for STA2, STA2 sends the second data frame to the AP on the time-frequency resource. .
  • the alignment of the first data frame with the second data frame may mean that the start position and the end position of the first data frame are both the same as the start position and the end position of the second data frame.
  • the plurality of OFDM symbols included in the first data frame are in a one-to-one relationship with the plurality of OFDM symbols included in the second data frame, or two or more OFDM symbols and the second data in the first data frame.
  • One OFDM symbol in the frame is aligned, or one OFDM symbol in the first data frame is aligned with two or more OFDM symbols in the second data frame.
  • multiple OFDM symbols may be included in the same data frame, and multiple OFDM symbols may be included in each OFDM symbol.
  • the parameters of the OFDM symbols in different segments of the same data frame may be different, such as subcarrier spacing, cyclic prefix length, but the parameters of the OFDM symbols in the same segment are the same.
  • the transmission time of each OFDM symbol may include a partial OFDM symbol time and a cyclic prefix time, and a partial OFDM symbol time may be determined by a subcarrier spacing.
  • the first data frame has the same length as the cyclic prefix of the two OFDM symbols at the same position in the second data frame.
  • the length of the cyclic prefix may be 0.4us, 0.8us, 1.6us, or 3.2us, etc.
  • a data frame is the same as a subcarrier spacing of two OFDM symbols at the same position in the second data frame, for example, the subcarrier spacing is 78.125 KHz, and the length of the partial OFDM symbol is 3.2 us, 6.4 us, or 12.8 us, etc.;
  • the data frame is the same as the start time of two OFDM symbols at the same position in the second data frame, and accordingly, the end times of the two OFDM symbols are the same.
  • the number of the plurality of OFDM symbols included in the first data frame is equal to the number of the plurality of OFDM symbols included in the second data frame.
  • the length of each of the first 10 OFDM symbols in the first data frame is 4 us, and the length of each OFDM symbol in the subsequent OFDM symbols is 16 us; accordingly, according to the alignment of two OFDM symbols at the same position
  • the length of each OFDM symbol in the first 10 OFDM symbols in the second data frame is also 4 us, and the length of each OFDM symbol in the subsequent OFDM symbols is also 16 us.
  • the AP may also send scheduling information to each STA, where the scheduling information may be used to schedule uplink data and downlink data.
  • the scheduling information is consistent with the scheduling information shown in FIG. 5 . For details, refer to the related description in FIG. 5 , and details are not described herein again.
  • the AP sends the scheduling information.
  • the STA2 can send the uplink data to the AP by using the short inter-frame space (SIFS) time.
  • the AP sends the downlink data to the STA1.
  • the AP and the STA1 may send a corresponding response message according to the uplink ACK transmission time and the downlink ACK transmission time in the scheduling information.
  • the communication diagram between the AP and the STA1 and the STA2 may be as shown in FIG. 6.
  • the DL ACK indicates a response message of the downlink data
  • the UL ACK indicates a response message of the uplink data.
  • the AP may also send a full duplex (FD) trigger frame to the STA, where the FD trigger frame may be used to schedule uplink data and Downstream data.
  • FD triggering frame is the same as the FD triggering frame shown in FIG. 7 . For details, refer to the related description in FIG. 7 , and details are not described herein again.
  • the AP sends the FD trigger frame.
  • the STA can send the uplink data to the AP at the SIFS time.
  • the AP sends the downlink data to the STA.
  • the AP and the STA may send a corresponding response message according to the uplink ACK transmission time and the downlink ACK transmission time in the FD trigger frame.
  • the communication diagram between the AP and the STA may be as shown in FIG. 8.
  • the DL ACK indicates a response message of the downlink data
  • the UL ACK indicates a response message of the uplink data.
  • the first data frame sent by the AP may be a downlink data frame
  • the received second data frame may be an uplink data frame
  • the first data frame sent by the STA may be an uplink data frame
  • the received second data frame may be a downlink data frame
  • the device supporting the full duplex communication may send the first data frame on the same time-frequency resource, and receive the second data frame, where multiple OFDM symbols and the second data frame are in the first data frame.
  • the plurality of OFDM symbols are aligned, so that the signals corresponding to the first data frame and the signals corresponding to the second data frame have the same phase, that is, the phases of the self-interference signal and the received signal are the same, thereby improving the effectiveness of eliminating the self-interference signal. , thereby improving the signal to noise ratio of the received signal.
  • each network element such as an AP and an STA.
  • each network element such as an AP and an STA.
  • it includes hardware structures and/or software modules corresponding to the execution of the respective functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • each function module may be divided according to each function, or two or more functions may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions:
  • FIG. 10 shows a possible structural diagram of the data transmission apparatus involved in the above embodiment.
  • the data transmission device includes a transmitting unit 1001 and a receiving unit 1002.
  • the transmitting unit 1001 and the receiving unit 1002 are configured to support the data transmission device to perform step 401 in FIG.
  • the data transmission device may further include a processing unit 1003, and the processing unit 1003 is configured to support the data transmission device to generate the first data frame, and parse the second data frame and the like. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional description of the corresponding functional modules, and details are not described herein again.
  • the processing unit 1003 in the present application may be a processor of the data transmission device
  • the sending unit 1001 may be a transmitter of the data transmission device
  • the receiving unit 1002 may be a receiver of the data transmission device.
  • the transmitter can usually be integrated with the receiver to function as a transceiver, and the specific transceiver can also be referred to as a communication interface.
  • FIG. 11 is a schematic diagram showing a possible logical structure of a data transmission apparatus involved in the foregoing embodiment provided by an embodiment of the present application.
  • the data transmission device includes a processor 1102 and a communication interface 1103.
  • the processor 1102 is configured to control and manage the actions of the data transmission device, for example, the processor 1102 is configured to support the first data frame of the data transmission device, parse the second data frame, and/or be used for the description herein. Other processes of technology.
  • the data transmission device may further include a memory 1101 and a bus 1104.
  • the processor 1102, the communication interface 1103, and the memory 1101 are connected to each other through a bus 1104.
  • the communication interface 1103 is configured to support the forwarding device as an intermediate node to communicate; the memory 1101 Program code and data for storing the forwarding device as an intermediate node.
  • the processor 1102 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like.
  • the bus 1104 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus or the like.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • FIG. 12 shows a possible structural diagram of the data transmission apparatus involved in the above embodiment.
  • the data transmission device includes a transmitting unit 1201 and a receiving unit 1202.
  • the sending unit 1201 and the receiving unit 1202 are configured to support the data transmission device to perform step 901 in FIG. 9.
  • the data transmission device further includes: a processing unit 1203, configured to generate a first data frame, and parse the second data frame. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional description of the corresponding functional modules, and details are not described herein again.
  • the processing unit 1203 in the present application may be a processor of the data transmission device
  • the sending unit 1201 may be a transmitter of the data transmission device
  • the receiving unit 1202 may be a receiver of the data transmission device.
  • the transmitter can usually be integrated with the receiver to function as a transceiver, and the specific transceiver can also be referred to as a communication interface.
  • FIG. 13 is a schematic diagram showing a possible logical structure of a data transmission apparatus involved in the foregoing embodiment provided by an embodiment of the present application.
  • the data transmission device includes a processor 1302 and a communication interface 1303.
  • the processor 1302 is configured to control manage the actions of the data transmission device, for example, the processor 1302 is configured to generate a first data frame, parse the second data frame, and/or other processes for the techniques described herein.
  • the data transmission device may further include a memory 1301 and a bus 1304.
  • the processor 1302, the communication interface 1303, and the memory 1301 are connected to each other through a bus 1304.
  • the communication interface 1303 is configured to support the data transmission device for communication; and the memory 1301 is configured to store the data transmission device. Program code and data for the data transfer device.
  • the processor 1302 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like.
  • Bus 1304 can be a Peripheral Component Interconnect Standard (PCI) bus or an Extended Industry Standard Architecture (EISA) bus or the like.
  • PCI Peripheral Component Interconnect Standard
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 13, but it does not mean that there is only one bus or one type of bus.
  • a readable storage medium stores computer execution instructions, when a device (which may be a single chip microcomputer, a chip, etc.) or a processor executes the method provided in FIG. The steps in the data transfer method.
  • the aforementioned readable storage medium may include various media that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk.
  • a readable storage medium wherein the readable storage medium stores computer execution instructions, when a device (which may be a single chip microcomputer, a chip, etc.) or a processor executes the method provided in FIG. The steps in the data transfer method.
  • the aforementioned readable storage medium may include various media that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk.
  • a computer program product comprising computer executed instructions stored in a computer readable storage medium; at least one processor of the device may be Reading the storage medium reads the computer execution instructions, and the at least one processor executing the computer execution instructions causes the apparatus to perform the steps in the data transmission method provided in FIG.
  • a computer program product comprising computer executed instructions stored in a computer readable storage medium; at least one processor of the device may be Reading the storage medium reads the computer execution instructions, and the at least one processor executing the computer execution instructions causes the apparatus to perform the steps in the data transmission method provided in FIG.
  • the device supporting the full duplex communication may send the first data frame on the same time-frequency resource, and receive the second data frame, and the pilot sequence and the OFDM symbol used in the first data frame are used.
  • the pilot sequences used in the OFDM symbols in the two data frames are orthogonal to each other. Since the inner products of the two pilot sequences that are orthogonal to each other are zero, the self-interference signal generated by the first data frame can be reduced to correspond to the second data frame. The effect of the received signal, which in turn increases the signal-to-noise ratio of the received signal.
  • the multiple OFDM symbols in the first data frame are aligned with the multiple OFDM symbols in the second data frame, so that the signal corresponding to the first data frame and the signal corresponding to the second data frame are the same, that is, self-interference is ensured.
  • the phase of the signal and the received signal are the same, so that the effectiveness of eliminating the self-interference signal can be improved, thereby improving the signal-to-noise ratio of the received signal.

Abstract

本申请实施例提供一种数据传输方法及装置,涉及通信技术领域,解决了全双工通信中残留自干扰信号会对接收信号造成污染,导致接收信号的信噪比较低的问题。所述方法应用于支持全双工通信的设备中,所述方法包括:在同一时频资源上发送第一数据帧,以及接收第二数据帧;其中,所述第一数据帧和所述第二数据帧均包括多个OFDM符号,所述第一数据帧中的OFDM符号采用的导频序列与所述第二数据帧中的OFDM符号采用的导频序列相互正交。

Description

一种数据传输方法及装置
本申请要求于2018年03月20日提交中国专利局、申请号为201810231109.4、申请名称为“一种数据传输方法及装置”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
本申请涉及通信技术领域,尤其涉及一种数据传输方法及装置。
背景技术
全双工(full duplex,FD)技术是指通信节点在相同的时间和相同的频率资源上进行数据的收发。比如,如图1所示,通信节点A和B均包括发送器和接收器,A中的发送器与B中的接收器通过数据线连接,同时A中的接收器与B中的发送器也通过数据线连接,A与B之间的收发数据可以在相同的无线信道上同时进行传输,从而可以提高无线频谱的利用效率,解决无线频谱资源稀缺的问题。但是,由于全双工采用相同的时频资源收发数据,因此本地发送器会对本地接收器产生自干扰信号,从而影响本地接收器对另一通信节点信号的接收,即接收器接收到的信号会受到自干扰信号的污染。
目前,全双工传输中通常可以采用天线干扰消除、射频干扰消除和数字干扰消除等三大类技术进行自干扰信号的消除。其中,天线干扰抑制通过增加发射天线与接收天线之间的隔离度来抑制发送器信号对接收器信号的干扰;射频干扰消除方法是将本地发送器的射频信号调制至与接收器相同的幅度、相反的相位,再与接收器信号合并,从而抵消自干扰;数字基带干扰消除方法是利用发送器基带信号,通过数据信号处理技术消除接收器信号中的发送器信号。
但是,采用上述自干扰消除技术进行处理后仍然会存在残留自干扰信号,残留自干扰信号仍会对接收器接收到的信号造成一定的污染,进而接收信号的信噪比较低。
发明内容
本申请的实施例提供一种数据传输方法及装置,解决了现有全双工通信技术中残留自干扰信号会对接收信号造成污染,导致接收信号的信噪比较低的问题。
为达到上述目的,本申请的实施例采用如下技术方案:
第一方面,提供一种数据传输方法,该方法应用于支持全双工通信的设备中,该方法包括:在同一时频资源上发送第一数据帧,以及接收第二数据帧;其中,第一数据帧和第二数据帧均包括多个OFDM符号,即第一数据帧和第二数据帧均采用OFDM调制,第一数据帧中的OFDM符号采用的导频序列与第二数据帧中的OFDM符号采用的导频序列相互正交。上述技术方案中,由于相互正交的两个导频序列的内积为零,从而可以降低第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,进而提高接收信号的信噪比。
在第一方面的一种可能的实现方式中,导频序列的长度为2,相互正交的导频序列 包括第一导频序列和第二导频序列,第一导频序列为[1 1],第二导频序列为以下中的任一种:[1 -1]、[-1 1]。上述可能的实现方式中,可以降低导频序列的长度为2时,第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,提高了第二数据帧对应的接收信号的信噪比。
在第一方面的一种可能的实现方式中,所述导频序列的长度为4,相互正交的导频序列包括第一导频序列和第二导频序列,第一导频序列为[1 1 1 -1],第二导频序列为以下中的任一种:[1 1 -1 1]、[1 -1 1 1]、[1 -1 -1 -1]、[-1 1 1 1]、[-1 1 -1 -1]、[-1 -1 1 -1]。上述可能的实现方式中,可以降低导频序列的长度为4时,第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,提高了第二数据帧对应的接收信号的信噪比。
在第一方面的一种可能的实现方式中,导频序列的长度为6,相互正交的导频序列包括第一导频序列和第二导频序列,第一导频序列为[1 1 1 -1 -1 1],第二导频序列为说明书中表1所示的任一种。上述可能的实现方式中,可以降低导频序列的长度为6时,第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,提高了第二数据帧对应的接收信号的信噪比。
在第一方面的一种可能的实现方式中,导频序列的长度为8,相互正交的导频序列包括第一导频序列和第二导频序列,第一导频序列为[1 1 1 -1 -1 1 1 1],第二导频序列为说明书中表2所示的任一种。上述可能的实现方式中,可以降低导频序列的长度为6时,第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,提高了第二数据帧对应的接收信号的信噪比。
在第一方面的一种可能的实现方式中,导频序列的长度为16,相互正交的导频序列包括第一导频序列和第二导频序列,第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表3所示的任一种。上述可能的实现方式中,可以降低导频序列的长度为16时,第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,提高了第二数据帧对应的接收信号的信噪比。
在第一方面的一种可能的实现方式中,导频序列的长度为24,相互正交的导频序列包括第一导频序列和第二导频序列,第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],第二导频序列为说明书中表4所示的任一种。上述可能的实现方式中,可以降低导频序列的长度为24时,第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,提高了第二数据帧对应的接收信号的信噪比。
在第一方面的一种可能的实现方式中,导频序列的长度为32,相互正交的导频序列包括第一导频序列和第二导频序列,第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],第二导频序列为说明书中表5所示的任一种。上述可能的实现方式中,可以降低导频序列的长度为32时,第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,提高了第二数据帧对应的接收信号的信噪比。
在第一方面的一种可能的实现方式中,第一数据帧与第二数据帧对齐,即第一数据帧与第二数据帧的起始位置和结束位置对齐。
在第一方面的一种可能的实现方式中,第一数据帧与第二数据帧中相同位置上的两个OFDM符号的循环前缀的长度相同。
在第一方面的一种可能的实现方式中,第一数据帧与第二数据帧中相同位置上的 两个OFDM符号的子载波间隔相同。
在第一方面的一种可能的实现方式中,第一数据帧与第二数据帧中相同位置上的两个OFDM符号的起始时间相同。
上述几种可能的实现方式中,可以使第一数据帧对应的信号和第二数据帧对应的信号的相位相同,即保证自干扰信号和接收信号的相位相同,从而可以提高消除自干扰信号的有效性,进而提高接收信号的信噪比。
第二方面,提供一种数据传输方法,该方法应用于支持全双工通信的设备中,该方法包括:在同一时频资源上发送第一数据帧,以及接收第二数据帧;其中,第一数据帧和第二数据帧均包括多个OFDM符号,且第一数据帧与第二数据帧对齐,即第一数据帧与第二数据帧的起始位置和结束位置对齐。上述技术方案中,可以使第一数据帧对应的信号和第二数据帧对应的信号的相位相同,即保证自干扰信号和接收信号的相位相同,从而可以提高消除自干扰信号的有效性,进而提高接收信号的信噪比。
在第一方面的一种可能的实现方式中,第一数据帧与第二数据帧中相同位置上的两个OFDM符号的循环前缀的长度相同。
在第一方面的一种可能的实现方式中,第一数据帧与第二数据帧中相同位置上的两个OFDM符号的子载波间隔相同。
在第一方面的一种可能的实现方式中,第一数据帧与第二数据帧中相同位置上的两个OFDM符号的起始时间相同。
第三方面,提供了一种数据传输装置,所述数据传输装置支持全双工通信,所述数据传输装置可以实现第一方面至第一方面的任一种可能的实现方式所提供的数据传输方法的功能。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上述功能相应的单元。示例性的,所述数据传输装置可以包括发送单元和接收单元。
在第三方面的一种可能的实现方式中,所述数据传输装置的结构中包括处理器、存储器、通信接口和总线,所述处理器、所述存储器和所述通信接口通过所述总线连接。所述存储器用于存储程序代码,当该程序代码被所述处理器执行时,使得所述数据传输装置执行第一方面至第一方面的任一种可能的实现方式所提供的数据传输方法中的步骤。
第四方面,提供了一种数据传输装置,所述数据传输装置支持全双工通信,所述数据传输装置可以实现第二方面至第二方面的任一种可能的实现方式所提供的数据传输方法的功能。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上述功能相应的单元。示例性的,所述数据传输装置可以包括发送单元和接收单元。
在第四方面的一种可能的实现方式中,所述数据传输装置的结构中包括处理器、存储器、通信接口和总线,所述处理器、所述存储器和所述通信接口通过所述总线连接。所述存储器用于存储程序代码,当该程序代码被所述处理器执行时,使得所述数据传输装置执行第二方面至第二方面的任一种可能的实现方式所提供的数据传输方法中的步骤。
第五方面,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,当其在计算机上运行时,使得该计算机执行上述第一方面或第一方面的任一种可能的实现方式所提供的数据传输方法。
第六方面,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,当其在计算机上运行时,使得该计算机执行上述第二方面或第二方面的任一种可能的实现方式所提供的数据传输方法。
第七方面,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,使得该计算机执行上述第一方面或第一方面的任一种可能的实现方式所提供的数据传输方法。
第八方面,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,使得该计算机执行上述第二方面或第二方面的任一种可能的实现方式所提供的数据传输方法。
可以理解地,上述提供的任一种数据传输方法的装置、计算机存储介质或者计算机程序产品均用于执行上文所提供的对应的方法,因此,其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果,此处不再赘述。
附图说明
图1为一种全双工通信的示意图;
图2为本申请实施例提供的一种通信系统的结构示意图;
图3为本申请实施例提供的另一种通信系统的结构示意图;
图4为本申请实施例提供的一种数据传输方法的流程示意图;
图5为本申请实施例提供的一种调度信息的结构示意图;
图6为本申请实施例提供的一种设备间的数据传输示意图;
图7为本申请实施例提供的一种FD触发帧的结构示意图;
图8为本申请实施例提供的另一种设备间的数据传输示意图;
图9为本申请实施例提供的另一种数据传输方法的流程示意图;
图10为本申请实施例提供的第一种数据传输装置的结构示意图;
图11为本申请实施例提供的第二种数据传输装置的结构示意图;
图12为本申请实施例提供的第三种数据传输装置的结构示意图;
图13为本申请实施例提供的第四种数据传输装置的结构示意图。
具体实施方式
全双工(full duplex,FD)技术是指一个节点可以在同一时频资源上进行数据的收发,即在相同的时间和相同的频率资源上进行数据的收发。本申请实施例中的同一时频资源可以是:收发数据的资源在时域上包括相同的时隙或符号,在频域上包括相同的子载波。
本申请实施例可适用于支持全双工通信的节点与其他一个或者多个节点之间的数据通信,涉及的无线通信场景可以包括:接入点(access point,AP)与站点(station,STA)之间的通信、AP与AP之间的通信、以及STA与STA之间的通信等。
其中,在AP与STA之间的通信中,AP可以支持全双工通信,STA可以支持半双工通信或全双工通信,当STA支持半双工通信时,AP可以与两个STA之间进行通 信(比如图2所示的无线通信系统中,AP支持全双工通信,STA 1和STA 2均支持半双工通信,AP同时与STA1和STA2进行通信),当STA支持全双工通信时,AP与STA之间的通信场景可以如图3所示或者图2所示(此时STA不执行全双工能力)。类似的,在AP与AP之间的通信中,其中的一个AP可以支持全双工通信,另一个或两个AP可以支持半双工通信或全双工通信;在STA与STA之间的通信中,其中的一个STA可以支持全双工通信,另一个或两个STA可以支持半双工通信或全双工通信。
本申请实施例中主要以AP与STA之间的通信为例进行说明。在实际应用中,AP和STA可以为通信服务器、路由器、交换机、网桥、计算机、手机、便携式设备、可穿戴设备等等。其中,AP与STA的区别在于:AP可以提供无线接入服务,允许其它无线设备接入,提供数据访问;STA也可以称为无线终端,其本身并不接受无线的接入,它可以连接到AP。
图4为本申请实施例提供的一种数据传输方法的流程示意图,该方法应用于支持全双工通信的设备中,该方法包括以下几个步骤。
步骤401:该设备在同一时频资源上发送第一数据帧,以及接收第二数据帧。其中,第一数据帧和第二数据帧均采用OFDM调制,第一数据帧中的OFDM符号采用的导频序列与第二数据帧中的OFDM符号采用的导频序列相互正交。
其中,该设备可以是AP,也可以是STA,这里以该设备为AP、且AP与STA之间的通信为例进行说明。当STA支持全双工通信,则第一数据帧和第二数据帧可以是AP与一个STA之间通信的数据,比如,AP在同一时频资源上向STA1发送第一数据帧,以及接收来自STA1的第二数据帧;相应的,对于STA1,则STA1在该时频资源上接收来自AP的第一数据帧,以及向AP发送第二数据帧。当STA不支持全双工通信,则第一数据帧和第二数据帧可以是AP与两个STA之间通信的数据,比如,AP在同一时频资源上向STA1发送第一数据帧,以及接收来自STA2的第二数据帧;相应的,对于STA1,则STA1在该时频资源上接收来自AP的第一数据帧,对于STA2,则STA2在该时频资源上向AP发送第二数据帧。
另外,第一数据帧和第二数据帧均包括多个OFDM符号,是指第一数据帧和第二数据帧均采用OFDM调制,调制后得到多个OFDM符号。第一数据帧和第二数据帧中每个OFDM符号对应的频域可以包括多个子载波,该多个子载波中的一部分子载波可用于发送导频序列。第一数据帧中的OFDM符号采用的导频序列与第二数据帧中的OFDM符号采用的导频序列相互正交,相互正交可以是指两个导频序列的内积为零,比如,假设两个导频序列分别为a=(x1,x2,...,xn)、b=(y1,y2,...,yn),则a和b的内积为零是指x1y1+x2y2+...+xnyn=0。
在实际应用中,设备与设备之间的通信,可以采用不同的带宽,当采用不同的带宽时,其数据帧中OFDM符号对应的频域包括的子载波数量不同。其中,设备通信时采用的带宽可以包括:20MHz、40MHz、80MHz和160MHz带宽等。每种带宽传输的数据帧中的OFDM符号均可以包括多个子载波,该多个子载波的数量与OFDM符号中子载波间隔的大小有关。比如,当OFDM符号中的子载波间隔为321.5kHz时,20MHz带宽传输的数据帧中的OFDM符号可以包括64个子载波;当OFDM符号中的子载波间隔为78.125kHz时,20MHz带宽传输的数据帧中的OFDM符号可以包括 256个子载波。
另外,通信系统还可以将连续的多个子载波聚合在一起形成资源块(比如,将连续的N个子载波聚合在一起形成N资源块,N可以表示该资源块中包含的子载波的数量),并将资源块分配给设备用于传输数据,即设备也可以采用资源块进行通信。为了支持OFDMA传输,802.11ax将20M,40M,80M和160M带宽划分以下多种资源块:26资源块、52资源块、106资源块、242资源块、484资源块、996资源块以及1992资源块,其中子载波间距为78.125KHz。
具体的,当该设备采用不同的带宽或者不同的资源块时,其数据帧中的OFDM符号采用的导频序列的长度也会有所不同。为便于描述,假设相互正交的两个导频序列分别为第一导频序列和第二导频序列,第一导频序列可以是第一数据帧中的OFDM符号采用的导频序列,第二导频序列可以是第二数据帧中的OFDM符号采用的导频序列;或者,第一导频序列为第二数据帧中的OFDM符号采用的导频序列,第二导频序列为第一数据帧中的OFDM符号采用的导频序列,本申请实施例对此不做具体限定。
在一种可能的实现方式中,当设备通信时采用26资源块时,第一导频序列和第二导频序列的长度为2,第一导频序列可以为[1 -1],第二导频序列可以为[1 1]或者[-1 -1]中的任一种。
在一种可能的实现方式中,当设备通信时采用52资源块、106资源块或者子载波间隔为312.5KHz的20MHz时,第一导频序列和第二导频序列的长度为4,第一导频序列可以为[1 1 1 -1],第二导频序列可以为[1 1 -1 1]、[1 -1 1 1]、[1 -1 -1 -1]、[-1 1 1 1]、[-1 1 -1 -1]、或者[-1 -1 1 -1]中的任一种。其中,子载波间隔为312.5KHz的20MHz带宽为非OFDMA资源块。
在一种可能的实现方式中,当设备通信时采用子载波间隔为312.5KHz的40MHz带宽时,第一导频序列和第二导频序列的长度为6,第一导频序列可以为[1 1 1 -1 -1 1],第二导频序列可以为以下表1所示的任一种。其中,子载波间隔为312.5KHz的40MHz带宽为非OFDMA资源块。
表1
序号 第二导频序列 序号 第二导频序列
1 [1 1 1 1 1 -1] 11 [-1 1 1 1 1 1]
2 [1 1 -1 1 1 1] 12 [-1 1 1 1 -1 -1]
3 [1 1 -1 1 -1 -1] 13 [-1 1 1 -1 1 -1]
4 [1 1 -1 -1 1 -1] 14 [-1 1 -1 1 -1 1]
5 [1 -1 1 1 1 1] 15 [-1 1 -1 -1 1 1]
6 [1 -1 1 1 -1 -1] 16 [-1 1 -1 -1 -1 -1]
7 [1 -1 1 -1 1 -1] 17 [-1 -1 1 1 -1 1]
8 [1 -1 -1 1 -1 1] 18 [-1 -1 1 -1 -1 -1]
9 [1 -1 -1 -1 1 1] 19 [-1 -1 1 -1 -1 -1]
10 [1 -1 -1 -1 -1 -1] 20 [-1 -1 -1 -1 -1 1]
在一种可能的实现方式中,当设备通信时采用242资源块或者子载波间隔为312.5KHz的80MHz带宽时,第一导频序列和第二导频序列的长度为8,第一导频序列可以为[1 1 1 -1 -1 1 1 1],第二导频序列可以为如下表2所示的任一种。其中,子载波间隔为312.5KHz的80MHz带宽为非OFDMA资源块。
表2
序号 第二导频序列 序号 第二导频序列
1 [1 1 1 1 1 1 -1 -1] 36 [-1 1 1 1 1 1 1 -1]
2 [1 1 1 1 1 -1 1 -1] 37 [-1 1 1 1 1 1 -1 1]
3 [1 1 1 1 1 -1 -1 1] 38 [-1 1 1 1 1 -1 1 1]
4 [1 1 1 1 -1 1-1 -1 -1] 39 [-1 1 1 1 -1 1 -1 -1]
5 [1 1 1 -1 1 -1 -1 -1] 40 [-1 1 1 1 -1 -1 1 -1]
6 [1 1 -1 1 1 1 1 -1] 41 [-1 1 1 1 -1 -1 -1 1]
7 [1 1 -1 1 1 1 -1 1] 42 [-1 1 1 -1 1 1 -1 -1]
8 [1 1 -1 1 1 -1 1 1] 43 [-1 1 1 -1 1 -1 1 -1]
9 [1 1 -1 1 -1 1 -1 -1] 44 [-1 1 1 -1 1 -1 -1 1]
10 [1 1 -1 1 -1 -1 1 -1] 45 [-1 1 1 -1 -1 -1 -1 -1]
11 [1 1 -1 1 -1 -1 -1 1] 46 [-1 1 -1 1 1 1 1 1]
12 [1 1 -1 -1 1 1 -1 -1] 47 [-1 1 -1 1 -1 1 1 -1]
13 [1 1 -1 -1 1 -1 1 -1] 48 [-1 1 -1 1 -1 1 -1 1]
14 [1 1 -1 -1 1 -1 -1 1] 49 [-1 1 -1 1 -1 -1 1 1]
15 [1 1 -1 -1 -1 -1 -1 -1] 50 [-1 1 -1 -1 1 1 1 -1]
16 [1 -1 1 1 1 1 1 -1] 51 [-1 1 -1 -1 1 1 -1 1]
17 [1 -1 1 1 1 1 -1 1] 52 [-1 1 -1 -1 1 -1 1 1]
18 [1 -1 1 1 1 -1 1 1] 53 [-1 1 -1 -1 -1 1 -1 -1]
19 [1 -1 1 1 -1 1 -1 -1] 54 [-1 1 -1 -1 -1 -1 1 -1]
20 [1 -1 1 1 -1 1 -1 -1] 55 [-1 1 -1 -1 -1 -1 -1 1]
21 [1 -1 1 1 -1 -1 -1 1] 56 [-1 -1 1 1 1 1 1 1]
22 [1 -1 1 -1 1 1 -1 -1] 57 [-1 -1 1 1 -1 1 1 -1]
23 [1 -1 1 -1 1 -1 1 -1] 58 [-1 -1 1 1 -1 1 -1 1]
24 [1 -1 1 -1 1 -1 -1 1] 59 [-1 -1 1 1 -1 -1 1 1]
25 [1 -1 1 -1 -1 -1 -1 -1] 60 [-1 -1 1 -1 1 1 1 -1]
26 [1 -1 -1 1 1 1 1 1] 61 [-1 -1 1 -1 1 1 -1 1]
27 [1 -1 -1 1 -1 1 1 -1] 62 [-1 -1 1 -1 1 -1 1 1]
28 [1 -1 -1 1 -1 1 -1 1] 63 [-1 -1 1 -1 -1 1 -1 -1]
29 [1 -1 -1 1 -1 -1 1 1] 64 [-1 -1 1 -1 -1 -1 1 -1]
30 [1 -1 -1 -1 1 1 1 -1] 65 [-1 -1 1 -1 -1 -1 -1 1]
31 [1 -1 -1 -1 1 1 -1 1] 66 [-1 -1 -1 1 -1 1 1 1]
32 [1 -1 -1 -1 1 -1 1 1] 67 [-1 -1 -1 -1 1 1 1 1]
33 [1 -1 -1 -1 -1 1 -1 -1] 68 [-1 -1 -1 -1 -1 1 1 -1]
34 [1 -1 -1 -1 -1 -1 1 -1] 69 [-1 -1 -1 -1 -1 1 -1 1]
35 [1 -1 -1 -1 -1 -1 -1 1] 70 [-1 -1 -1 -1 -1 -1 1 1]
在一种可能的实现方式中,当设备通信时采用484资源块、或者子载波间隔为312.5KHz的160MHz带宽时,第一导频序列和第二导频序列的长度为16,第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],第二导频序列为如下表3所示的任一种,即484资源块或者该160MHz带宽对应的第一导频序列和第二导频序列均为242资源块对应的第一导频序列和第二导频序列的两倍的重复。其中,子载波间隔为312.5KHz的160MHz带宽为非OFDMA资源块。
表3
序号 第二导频序列
1 [1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1]
2 [1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1 1 -1]
3 [1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1]
4 [1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1]
5 [1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1]
6 [1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1]
7 [1 1 -1 1 1 1 -1 1 1 1 -1 1 1 1 -1 1]
8 [1 1 -1 1 1 -1 1 1 1 1 -1 1 1 -1 1 1]
9 [1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1]
10 [1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1]
11 [1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1]
12 [1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1]
13 [1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1]
14 [1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1]
15 [1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1]
16 [1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1]
17 [1 -1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1 1]
18 [1 -1 1 1 1 -1 1 1 1 -1 1 1 1 -1 1 1]
19 [1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1]
20 [1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1]
21 [1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1]
22 [1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1]
23 [1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 1 -1 -1]
24 [1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1]
25 [1 -1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1]
26 [1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1]
27 [1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1]
28 [1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1]
29 [1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1]
30 [1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1]
31 [1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1]
32 [1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1]
33 [1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1]
34 [1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1]
35 [1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1]
36 [-1 1 1 1 1 1 1-1 -1 1 1 1 1 1 1-1]
37 [-1 1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1 1]
38 [-1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1 1 1]
39 [-1 1 1 1 -1 1 -1-1 -1 1 1 1 -1 1 -1-1]
40 [-1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1]
41 [-1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1]
42 [-1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1]
43 [-1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1]
44 [-1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1]
45 [-1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1]
46 [-1 1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 1]
47 [-1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1]
48 [-1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1]
49 [-1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1]
50 [-1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1]
51 [-1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1]
52 [-1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1]
53 [-1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1]
54 [-1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1]
55 [-1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1]
56 [-1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1]
57 [-1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1]
58 [-1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1]
59 [-1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1]
60 [-1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1]
61 [-1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1]
62 [-1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1]
63 [-1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1]
64 [-1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1]
65 [-1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1]
66 [-1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1]
67 [-1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1]
68 [-1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1]
69 [-1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1]
70 [-1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1]
在一种可能的实现方式中,当设备通信时采用996资源块时,第一导频序列和第二导频序列的长度为24,第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1-1 1 1 1],第二导频序列为如下表4所示的任一种,即996资源块对应的第一导频序列和第二导频序列均为242资源块对应的第一导频序列和第二导频序列的三倍的重复。
表4
序号 第二导频序列
1 [1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1]
2 [1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1 1 -1]
3 [1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1]
4 [1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1]
5 [1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1]
6 [1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1]
7 [1 1 -1 1 1 1 -1 1 1 1 -1 1 1 1 -1 1 1 1 -1 1 1 1 -1 1]
8 [1 1 -1 1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1 1 1 -1 1 1]
9 [1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1]
10 [1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1]
11 [1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1]
12 [1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1]
13 [1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1]
14 [1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1]
15 [1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1]
16 [1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1]
17 [1 -1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1 1]
18 [1 -1 1 1 1 -1 1 1 1 -1 1 1 1 -1 1 1 1 -1 1 1 1 -1 1 1]
19 [1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1]
20 [1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1]
21 [1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1]
22 [1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1]
23 [1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1]
24 [1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1]
25 [1 -1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1]
26 [1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1]
27 [1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1]
28 [1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1]
29 [1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1]
30 [1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1]
31 [1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1]
32 [1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1]
33 [1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1]
34 [1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1]
35 [1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1]
36 [-1 1 1 1 1 1 1-1 -1 1 1 1 1 1 1-1 -1 1 1 1 1 1 1-1]
37 [-1 1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1 1]
38 [-1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1 1 1 -1 1 1 1 1 -1 1 1]
39 [-1 1 1 1 -1 1 -1-1 -1 1 1 1 -1 1 -1-1 -1 1 1 1 -1 1 -1-1]
40 [-1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1]
41 [-1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1]
42 [-1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1]
43 [-1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1]
44 [-1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1]
45 [-1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1]
46 [-1 1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 1]
47 [-1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1]
48 [-1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1 -1 1]
49 [-1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1]
50 [-1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1]
51 [-1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1]
52 [-1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1]
53 [-1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1]
54 [-1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1]
55 [-1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1]
56 [-1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1]
57 [-1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1]
58 [-1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1]
59 [-1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1]
60 [-1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1]
61 [-1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 1 1 -1 1]
62 [-1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 1 1]
63 [-1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1]
64 [-1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1]
65 [-1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1]
66 [-1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1]
67 [-1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1]
68 [-1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1]
69 [-1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1]
70 [-1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1]
在一种可能的实现方式中,当设备通信时采用1992资源块时,第一导频序列和第二导频序列的长度为32,第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],第二导频序列为如下表5所示的任一种,即1996资源块对应的第一导频序列和第二导频序列均为242资源块对应的第一导频序列和第二导频序列的四倍的重复。
表5
Figure PCTCN2019075496-appb-000001
Figure PCTCN2019075496-appb-000003
Figure PCTCN2019075496-appb-000004
进一步地,第一数据帧与第二数据帧对齐。其中,第一数据帧与第二数据帧对齐可以是指第一数据帧的起始位置和结束位置均与第二数据帧的起始位置和结束位置相同。比如,第一数据帧包括的多个OFDM符号与第二数据帧包括的多个OFDM符号为一一对齐的关系,或者第一数据帧中的两个或者两个以上的OFDM符号与第二数据帧中的一个OFDM符号对齐,或者第一数据帧中的一个OFDM符号与第二数据帧中的两个或者两个以上OFDM符号对齐。
在同一数据帧中可以包括多段OFDM符号,每段OFDM符号中可以包括多个OFDM符号。同一数据帧的不同段中OFDM符号的参数可能不同,比如子载波间距,循环前缀长度,但同段中的OFDM符号的参数是相同的。每个OFDM符号的传输时间可以包括部分OFDM符号时间和循环前缀时间,部分OFDM符号时间可以由子载波间隔决定。
具体地,第一数据帧与第二数据帧中相同位置上的两个OFDM符号的循环前缀的长度相同,比如,循环前缀的长度为0.4us、0.8us、1.6us或者3.2us等;第一数据帧与第二数据帧中相同位置上的两个OFDM符号的子载波间隔相同,比如,子载波间隔为78.125KHz,部分OFDM符号的长度为3.2us、6.4us或者12.8us等;第一数据帧与第二数据帧中相同位置上的两个OFDM符号的起始时间相同,相应地,该两个OFDM符号的结束时间也相同。此时,第一数据帧包括的多个OFDM符号的数量与第二数据帧包括的多个OFDM符号的数量相等。
示例性地,第一数据帧中前10个OFDM符号中每个OFDM符号的长度为4us,后续OFDM符号中每个OFDM符号的长度为16us;相应地,根据相同位置上的两个OFDM符号对齐的描述,则第二数据帧中前10个OFDM符号中每个OFDM符号的长度也为4us,后续OFDM符号中每个OFDM符号的长度也为16us。
进一步地,当该设备为AP时,该设备在步骤401之前,还可以向STA发送导频序列指示信息,该导频序列指示信息可以用于指示STA发送的数据帧中的OFDM符号所采用的导频序列。
当相互正交的导频序列包括上述实施例中所提供的第一导频序列和第二导频序列时,AP可以向STA发送导频序列指示信息,该导频序列指示信息可用于指示STA使用第一导频序列(此时,AP可以使用第二导频序列)、或者用于指示AP使用的导频序列为第二导频序列;或者,该导频序列指示信息可用于指示STA使用第二导频序列(此时,AP可以使用第一导频序列)、或者用于指示AP使用的导频序列为第一导频序列,从而保证AP与STA所使用的导频序列相互正交。
可选的,AP也可以向STA发送用于指示是否使用相互正交的导频序列的指示信息,比如,当AP使用第一导频序列时,AP可以通过指示信息指示STA使用第二导频序列,也可以指示STA不使用第二导频序列。
进一步地,当该设备为AP,且AP与两个支持半双工通信的STA通信时,AP还可以向每个STA发送调度信息,该调度信息可以用于调度上行数据和下行数据。具体地,如图5所示,该调度信息可以包括帧控制、时长/标识字段、上行发送端MAC地址、下行接收端MAC地址(可选出现)、上行ACK发送时间(可选出现)、下行ACK发送时间(可选出现)、发送端地址和帧校验字段。这里以两个STA包括STA1和STA2,AP向STA1发送下行数据以及接收来自STA2的上行数据为例进行说明,则上行发送端MAC地址可以为STA2的MAC地址,下行接收端MAC地址可以为STA1的MAC地址,上行ACK发送时间可以是指AP发送给STA2的应答消息的时间,下行ACK发送时间可以是指STA1发送给AP的应答消息的时间,发送端地址可以是指AP的MAC地址。
相应的,AP发送调度信息,当STA2接收到该调度信息后,STA2可以隔短帧间间隔(short inter-frame space,SIFS)时间向AP发送上行数据,此时,AP向STA1发送下行数据。之后,AP和STA1可以按照该调度信息中的上行ACK发送时间和下行ACK发送时间发送对应的应答消息。其中,AP与STA1和STA2之间的通信示意图可以如图6所示,DL ACK表示下行数据的应答消息,UL ACK表示上行数据的应答消息。
或者,进一步地,当该设备为AP,且AP与支持全双工通信的STA通信时,AP还可以向STA发送全双工(full duplex,FD)触发帧,该FD触发帧可以用于调度上行数据和下行数据。具体地,如图7所示,该FD触发帧可以包括帧控制、时长/标识字段、上行发送端MAC地址、下行接收端MAC地址、上行ACK发送时间、下行ACK发送时间、发送端地址和帧校验字段。需要说明的是,以上提到的FD触发帧也可以基于802.11ax协议中的触发帧进行修改,增加上述提到的但802.11ax中触发帧未包含的字段。
相应的,AP发送FD触发帧,当STA接收到该FD触发帧后,STA可以隔SIFS时间向AP发送上行数据,此时,AP向STA发送下行数据。之后,AP和STA可以按照该FD触发帧中的上行ACK发送时间和下行ACK发送时间发送对应的应答消息。其中,AP与STA之间的通信示意图可以如图8所示,DL ACK表示下行数据的应答消息,UL ACK表示上行数据的应答消息。
需要说明的是,当本申请实施例中支持全双工通信的设备为AP时,AP发送的第一数据帧可以为下行数据帧,接收的第二数据帧可以为上行数据帧;当本申请实施例中支持全双工通信的设备为STA时,STA发送的第一数据帧可以为上行数据帧,接收的第二数据帧可以为下行数据帧。
在本申请实施例中,支持全双工通信的设备可以在同一时频资源上发送第一数据帧,并接收第二数据帧,且第一数据帧中的OFDM符号采用的导频序列与第二数据帧中的OFDM符号采用的导频序列相互正交,由于相互正交的两个导频序列的内积为零,从而可以降低第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,进而提高接收信号的信噪比。此外,第一数据帧与第二数据帧对齐,可以使第一数据帧对应的信号和第二数据帧对应的信号的相位相同,即保证自干扰信号和接收信号的相位相同,从而可以提高消除自干扰信号的有效性,进而提高接收信号的信噪比。
图9为本申请实施例提供的一种数据传输方法的流程示意图,该方法应用于支持全双工通信的设备中,该方法包括以下几个步骤。
步骤901:该设备在同一时频资源上发送第一数据帧,以及接收第二数据帧。其中,第一数据帧和第二数据帧均包括多个OFDM符号,且第一数据帧与第二数据帧对齐。
其中,该设备可以是AP,也可以是STA,这里以该设备为AP、且AP与STA之间的通信为例进行说明。当STA支持全双工通信,则第一数据帧和第二数据帧可以是AP与一个STA之间通信的数据,比如,AP在同一时频资源上向STA1发送第一数据帧,以及接收来自STA1的第二数据帧;相应的,对于STA1,则STA1在该时频资源上接收来自AP的第一数据帧,以及向AP发送第二数据帧。当STA不支持全双工通信,则第一数据帧和第二数据帧可以是AP与两个STA之间通信的数据,比如,AP在同一时频资源上向STA1发送第一数据帧,以及接收来自STA2的第二数据帧;相应的,对于STA1,则STA1在该时频资源上接收来自AP的第一数据帧,对于STA2,则STA2在该时频资源上向AP发送第二数据帧。
另外,第一数据帧与第二数据帧对齐可以是指第一数据帧的起始位置和结束位置均与第二数据帧的起始位置和结束位置相同。比如,第一数据帧包括的多个OFDM符号与第二数据帧包括的多个OFDM符号为一一对齐的关系,或者第一数据帧中的两个或者两个以上的OFDM符号与第二数据帧中的一个OFDM符号对齐,或者第一数据帧中的一个OFDM符号与第二数据帧中的两个或者两个以上的OFDM符号对齐。
进一步地,在同一数据帧中可以包括多段OFDM符号,每段OFDM符号中可以包括多个OFDM符号。同一数据帧的不同段中OFDM符号的参数可能不同,比如子载波间距,循环前缀长度,但同段中的OFDM符号的参数是相同的。每个OFDM符号的传输时间可以包括部分OFDM符号时间和循环前缀时间,部分OFDM符号时间可以由子载波间隔决定。
具体地,第一数据帧与第二数据帧中相同位置上的两个OFDM符号的循环前缀的长度相同,比如,循环前缀的长度可以为0.4us、0.8us、1.6us或者3.2us等;第一数据帧与第二数据帧中相同位置上的两个OFDM符号的子载波间隔相同,比如,子载波间隔为78.125KHz,部分OFDM符号的长度为3.2us、6.4us或者12.8us等;第一数据帧与第二数据帧中相同位置上的两个OFDM符号的起始时间相同,相应地,该两个OFDM符号的结束时间相同。此时,第一数据帧包括的多个OFDM符号的数量与第二数据帧包括的多个OFDM符号的数量相等。
示例性地,第一数据帧中前10个OFDM符号中每个OFDM符号的长度为4us,后续OFDM符号中每个OFDM符号的长度为16us;相应地,根据相同位置上的两个OFDM符号对齐的描述,则第二数据帧中前10个OFDM符号中每个OFDM符号的长度也为4us,后续OFDM符号中每个OFDM符号的长度也为16us。
进一步地,当该设备为AP,且AP与两个支持半双工通信的STA通信时,AP还可以向每个STA发送调度信息,该调度信息可以用于调度上行数据和下行数据。其中,该调度信息与图5所示的调度信息一致,具体可以参见图5的相关描述,本申请实施例在此不再赘述。
相应的,AP发送调度信息,当STA2接收到该调度信息后,STA2可以隔短帧间间隔(short inter-frame space,SIFS)时间向AP发送上行数据,此时,AP向STA1发送下行数据。之后,AP和STA1可以按照该调度信息中的上行ACK发送时间和下行ACK发送时间发送对应的应答消息。其中,AP与STA1和STA2之间的通信示意图可以如图6所示,DL ACK表示下行数据的应答消息,UL ACK表示上行数据的应答消息。
或者,当该设备为AP,且AP与支持全双工通信的STA通信时,AP还可以向STA发送全双工(full duplex,FD)触发帧,该FD触发帧可以用于调度上行数据和下行数据。其中,该FD触发帧与图7所示的FD触发帧一致,具体可以参见图7的相关描述,本申请实施例在此不再赘述。
相应的,AP发送FD触发帧,当STA接收到该FD触发帧后,STA可以隔SIFS时间向AP发送上行数据,此时,AP向STA发送下行数据。之后,AP和STA可以按照该FD触发帧中的上行ACK发送时间和下行ACK发送时间发送对应的应答消息。其中,AP与STA之间的通信示意图可以如图8所示,DL ACK表示下行数据的应答消息,UL ACK表示上行数据的应答消息。
需要说明的是,当本申请实施例中支持全双工通信的设备为AP时,AP发送的第一数据帧可以为下行数据帧,接收的第二数据帧可以为上行数据帧;当本申请实施例中支持全双工通信的设备为STA时,STA发送的第一数据帧可以为上行数据帧,接收的第二数据帧可以为下行数据帧。
在本申请实施例中,支持全双工通信的设备可以在同一时频资源上发送第一数据帧,并接收第二数据帧,第一数据帧中的多个OFDM符号与第二数据帧中的多个OFDM符号对齐,可以使第一数据帧对应的信号和第二数据帧对应的信号的相位相同,即保证自干扰信号和接收信号的相位相同,从而可以提高消除自干扰信号的有效性,进而提高接收信号的信噪比。
上述主要从网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是,各个网元,例如AP和STA。为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对AP和STA进行功能模块的划分,例如,可以对应各个功能划分各个功能模块,也可以将两个或两个以上的功能集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为例进行说明:
在采用集成的单元的情况下,图10示出了上述实施例中所涉及的数据传输装置的一种可能的结构示意图。该数据传输装置包括:发送单元1001和接收单元1002。其 中,发送单元1001和接收单元1002用于支持该数据传输装置执行图4中的步骤401。进一步的,该数据传输装置还可以包括处理单元1003,处理单元1003用于支持该数据传输装置生成第一数据帧、以及解析第二数据帧等。上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。
在采用硬件实现的基础上,本申请中的处理单元1003可以为该数据传输装置的处理器,发送单元1001可以为该数据传输装置的发送器,接收单元1002可以为该数据传输装置的接收器,发送器通常可以和接收器集成在一起用作收发器,具体的收发器还可以称为通信接口。
图11所示,为本申请的实施例提供的上述实施例中所涉及的数据传输装置的一种可能的逻辑结构示意图。该数据传输装置的包括:处理器1102和通信接口1103。处理器1102用于对该数据传输装置的的动作进行控制管理,例如,处理器1102用于支持该数据传输装置的生成第一数据帧、解析第二数据帧,和/或用于本文所描述的技术的其他过程。此外,该数据传输装置的还可以包括存储器1101和总线1104,处理器1102、通信接口1103以及存储器1101通过总线1104相互连接;通信接口1103用于支持该作为中间节点的转发设备进行通信;存储器1101用于存储该作为中间节点的转发设备的程序代码和数据。
其中,处理器1102可以是中央处理器单元,通用处理器,数字信号处理器,专用集成电路,现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框,模块和电路。所述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,数字信号处理器和微处理器的组合等等。总线1104可以是外设部件互连标准(peripheral component interconnect,PCI)总线或扩展工业标准结构(extended industry standard architecture,EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图11中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
在采用集成的单元的情况下,图12示出了上述实施例中所涉及的数据传输装置的一种可能的结构示意图。该数据传输装置的包括:发送单元1201和接收单元1202。其中,发送单元1201和接收单元1202用于支持该数据传输装置执行图9中的步骤901。进一步的,该数据传输装置还包括:处理单元1203,用于生成第一数据帧、以及解析第二数据帧。上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述,在此不再赘述。
在采用硬件实现的基础上,本申请中的处理单元1203可以为该数据传输装置的处理器,发送单元1201可以为该数据传输装置的发送器,接收单元1202可以为该数据传输装置的接收器,发送器通常可以和接收器集成在一起用作收发器,具体的收发器还可以称为通信接口。
图13所示,为本申请的实施例提供的上述实施例中所涉及的数据传输装置的一种可能的逻辑结构示意图。该数据传输装置包括:处理器1302和通信接口1303。处理器1302用于对该数据传输装置的动作进行控制管理,例如,处理器1302用于生成第一数据帧、解析第二数据帧,和/或用于本文所描述的技术的其他过程。此外,该数据 传输装置还可以包括存储器1301和总线1304,处理器1302、通信接口1303以及存储器1301通过总线1304相互连接;通信接口1303用于支持该数据传输装置进行通信;存储器1301用于存储该数据传输装置的程序代码和数据。
其中,处理器1302可以是中央处理器单元,通用处理器,数字信号处理器,专用集成电路,现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框,模块和电路。所述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,数字信号处理器和微处理器的组合等等。总线1304可以是外设部件互连标准(PCI)总线或扩展工业标准结构(EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图13中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
在本申请的另一实施例中,还提供一种可读存储介质,可读存储介质中存储有计算机执行指令,当一个设备(可以是单片机,芯片等)或者处理器执行图4所提供的数据传输方法中的步骤。前述的可读存储介质可以包括:U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的另一实施例中,还提供一种可读存储介质,可读存储介质中存储有计算机执行指令,当一个设备(可以是单片机,芯片等)或者处理器执行图9所提供的数据传输方法中的步骤。前述的可读存储介质可以包括:U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的另一实施例中,还提供一种计算机程序产品,该计算机程序产品包括计算机执行指令,该计算机执行指令存储在计算机可读存储介质中;设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令,至少一个处理器执行该计算机执行指令使得设备执行图4所提供的数据传输方法中的步骤。
在本申请的另一实施例中,还提供一种计算机程序产品,该计算机程序产品包括计算机执行指令,该计算机执行指令存储在计算机可读存储介质中;设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令,至少一个处理器执行该计算机执行指令使得设备执行图9所提供的数据传输方法中的步骤。
在本申请实施例中,支持全双工通信的设备可以在同一时频资源上发送第一数据帧,并接收第二数据帧,且第一数据帧中的OFDM符号采用的导频序列与第二数据帧中的OFDM符号采用的导频序列相互正交,由于相互正交的两个导频序列的内积为零,从而可以降低第一数据帧产生的自干扰信号对第二数据帧对应的接收信号的影响,进而提高接收信号的信噪比。或者,第一数据帧中的多个OFDM符号与第二数据帧中的多个OFDM符号对齐,可以使第一数据帧对应的信号和第二数据帧对应的信号的相位相同,即保证自干扰信号和接收信号的相位相同,从而可以提高消除自干扰信号的有效性,进而提高接收信号的信噪比。
最后应说明的是:以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何在本申请揭露的技术范围内的变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。

Claims (36)

  1. 一种数据传输方法,其特征在于,所述方法应用于支持全双工通信的设备中,所述方法包括:
    在同一时频资源上发送第一数据帧,以及接收第二数据帧;
    其中,所述第一数据帧和所述第二数据帧均包括多个OFDM符号,所述第一数据帧中的OFDM符号采用的导频序列与所述第二数据帧中的OFDM符号采用的导频序列相互正交。
  2. 根据权利要求1所述的方法,其特征在于,所述导频序列的长度为2,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1],所述第二导频序列为以下中的任一种:[1 -1]、[-1 1]。
  3. 根据权利要求1所述的方法,其特征在于,所述导频序列的长度为4,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1],所述第二导频序列为以下中的任一种:[1 1 -1 1]、[1 -1 1 1]、[1 -1 -1 -1]、[-1 1 1 1]、[-1 1 -1 -1]、[-1 -1 1 -1]。
  4. 根据权利要求1所述的方法,其特征在于,所述导频序列的长度为6,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1],所述第二导频序列为说明书中表1所示的任一种。
  5. 根据权利要求1所述的方法,其特征在于,所述导频序列的长度为8,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表2所示的任一种。
  6. 根据权利要求1所述的方法,其特征在于,所述导频序列的长度为16,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表3所示的任一种。
  7. 根据权利要求1所述的方法,其特征在于,所述导频序列的长度为24,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表4所示的任一种。
  8. 根据权利要求1所述的方法,其特征在于,所述导频序列的长度为32,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表5所示的任一种。
  9. 根据权利要求1-8任一项所述的方法,其特征在于,所述第一数据帧与所述第二数据帧对齐。
  10. 根据权利要求9所述的方法,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的循环前缀的长度相同。
  11. 根据权利要求9或10所述的方法,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的子载波间隔相同。
  12. 根据权利要求9-11任一项所述的方法,其特征在于,所述第一数据帧与所述 第二数据帧中相同位置上的两个OFDM符号的起始时间相同。
  13. 一种数据传输方法,其特征在于,所述方法应用于支持全双工通信的设备中,所述方法包括:
    在同一时频资源上发送第一数据帧,以及接收第二数据帧;
    其中,所述第一数据帧和所述第二数据帧均包括多个OFDM符号,且所述第一数据帧与所述第二数据帧对齐。
  14. 根据权利要求13所述的方法,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的循环前缀的长度相同。
  15. 根据权利要求13或14所述的方法,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的子载波间隔相同。
  16. 根据权利要求13-15任一项所述的方法,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的起始时间相同。
  17. 一种数据传输装置,其特征在于,所述装置支持全双工通信,所述装置包括:
    发送单元,用于在时频资源上发送第一数据帧;
    接收单元,用于在所述时频资源上接收第二数据帧;
    其中,所述第一数据帧和所述第二数据帧均包括多个OFDM符号,所述第一数据帧中的OFDM符号采用的导频序列与所述第二数据帧中的OFDM符号采用的导频序列相互正交。
  18. 根据权利要求17所述的装置,其特征在于,所述导频序列的长度为2,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1],所述第二导频序列为以下中的任一种:[1 -1]、[-1 1]。
  19. 根据权利要求17所述的装置,其特征在于,所述导频序列的长度为4,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1],所述第二导频序列为以下中的任一种:[1 1 -1 1]、[1 -1 1 1]、[1 -1 -1 -1]、[-1 1 1 1]、[-1 1 -1 -1]、[-1 -1 1 -1]。
  20. 根据权利要求17所述的装置,其特征在于,所述导频序列的长度为6,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1],所述第二导频序列为说明书中表1所示的任一种。
  21. 根据权利要求17所述的装置,其特征在于,所述导频序列的长度为8,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表2所示的任一种。
  22. 根据权利要求17所述的装置,其特征在于,所述导频序列的长度为16,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表3所示的任一种。
  23. 根据权利要求17所述的装置,其特征在于,所述导频序列的长度为24,相互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表4所示的任一种。
  24. 根据权利要求17所述的装置,其特征在于,所述导频序列的长度为32,相 互正交的导频序列包括第一导频序列和第二导频序列,所述第一导频序列为[1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1 1 1 1 -1 -1 1 1 1],所述第二导频序列为说明书中表5所示的任一种。
  25. 根据权利要求17-24任一项所述的装置,其特征在于,所述第一数据帧与所述第二数据帧对齐。
  26. 根据权利要求25所述的装置,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的循环前缀的长度相同。
  27. 根据权利要求25或26所述的装置,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的子载波间隔相同。
  28. 根据权利要求25-27任一项所述的装置,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的起始时间相同。
  29. 一种数据传输装置,其特征在于,所述装置支持全双工通信,所述装置包括:
    发送单元,用于时频资源上发送第一数据帧;
    接收单元,用于在所述时频资源上接收第二数据帧;
    其中,所述第一数据帧和所述第二数据帧均包括多个OFDM符号,且所述第一数据帧与所述第二数据帧对齐。
  30. 根据权利要求29所述的装置,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的循环前缀的长度相同。
  31. 根据权利要求29或30所述的装置,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的子载波间隔相同。
  32. 根据权利要求29-31任一项所述的装置,其特征在于,所述第一数据帧与所述第二数据帧中相同位置上的两个OFDM符号的起始时间相同。
  33. 一种数据传输装置,其特征在于,所述装置包括处理器和存储器,所述存储器用于存储指令,所述处理器用于执行存储器中的指令以执行权利要求1至16中任一项所述的方法。
  34. 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用于存储计算机程序,当所述计算机程序在计算机上运行时,使得所述计算机执行权利要求1至16中任一项所述的方法。
  35. 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权利要求1至16中任一项所述的方法的指令。
  36. 一种数据传输装置,其特征在于,用于实现权利要求1至16中任一项所述的方法。
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