WO2019028916A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2019028916A1
WO2019028916A1 PCT/CN2017/097272 CN2017097272W WO2019028916A1 WO 2019028916 A1 WO2019028916 A1 WO 2019028916A1 CN 2017097272 W CN2017097272 W CN 2017097272W WO 2019028916 A1 WO2019028916 A1 WO 2019028916A1
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WIPO (PCT)
Prior art keywords
control information
downlink control
bit
bits
uplink data
Prior art date
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PCT/CN2017/097272
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English (en)
Chinese (zh)
Inventor
南方
余政
赵越
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2017/097272 priority Critical patent/WO2019028916A1/fr
Priority to CN201780093613.6A priority patent/CN110999153B/zh
Publication of WO2019028916A1 publication Critical patent/WO2019028916A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • the present application relates to the field of communications, and in particular, to a data transmission method and apparatus in the field of communications.
  • LTE long term evolution
  • the downlink data is carried by a physical downlink shared channel (PDSCH)
  • the uplink data is carried by a physical uplink shared channel (PUSCH).
  • the network device indicates information such as resource allocation and modulation and coding mode of the PDSCH and the PUSCH to the terminal device by using downlink control information (DCI).
  • DCI can be carried by a physical downlink control channel (PDCCH).
  • the uplink and downlink data transmission of the LTE system adopts a hybrid automatic repeat request (HARQ) technology
  • HARQ hybrid automatic repeat request
  • the specific processing flow is: Each time the data is sent contains error correction and error detection bits. If the number of error bits in the received data is within the error correction capability, the error is corrected by itself; when the error is serious and the error correction capability is exceeded, then Let the sender resend the data.
  • LTE adopts the multi-process stop-and-wait HARQ implementation mode.
  • the receiving end feeds back an acknowledgement (ACK) to the transmitting end, otherwise the feedback is negative.
  • a negative acknowledgment (NACK) indicates a retransmission.
  • the sender waits for ACK/NACK feedback, the process temporarily suspends the transmission.
  • the feedback selects whether to send new data or retransmit the last data sent by the process according to whether the ACK or NACK is fed back.
  • the ACK/NACK feedback of the uplink data is carried by a physical hybrid ARQ indicator channel (PHICH).
  • PHICH physical hybrid ARQ indicator channel
  • the PDCCH and PHICH occupied by the LTE system may have a frequency width of the entire system and may reach a maximum of 20 MHz.
  • the receiving bandwidth of the terminal device is smaller than the system bandwidth, the DCI carried by the PDCCH and the ACK/NACK carried by the PHICH cannot be received.
  • the DCI can be carried by the MPDCCH because the bandwidth occupied by the physical downlink control channel (MPDCCH) of the machine type communication is not more than one narrowband.
  • MPDCCH physical downlink control channel
  • NDI new data indicator
  • the function of the ACK/NACK feedback in the DCI carried by the MPDCCH can be implemented by the NDI bit in the DCI carried by the MPDCCH, so that the terminal device does not need to receive the ACK/NACK of the PHICH bearer.
  • the method for implicitly receiving the uplink data of the PUSCH by the NDI in the DCI is implicitly fed back.
  • the base station needs to wait until the next uplink data of the terminal device.
  • the NDI indicates new uplink data.
  • the terminal device may need to wait for a period of time before the next uplink data needs to be sent. Therefore, the network device also needs to wait for a period of time.
  • the NDI feedback in the DCI can be correctly received, so that the terminal device may not be able to know in time whether the uplink data is correctly received by the network device, that is, the network device has a large delay in the feedback of the uplink data.
  • the present application provides a data transmission method and apparatus, in order to reduce the feedback delay of network equipment to uplink data.
  • the first aspect provides a data transmission method, where the method includes: the network device receives the uplink data, and sends the first downlink control information, where the first bit of the first downlink control information has a value of 1, the first The number of one bit is greater than or equal to 1. The first bit is used to indicate that the first downlink control information is used to indicate that the network device acknowledges or negatively acknowledges the uplink data.
  • the terminal device sends uplink data, and receives the first downlink control information.
  • the terminal device may determine, according to the first downlink control information, whether the uplink data is correctly received by the network device.
  • the network device may send the first downlink control information to the terminal device, and feedback the receiving condition of the uplink data, without The technology waits until the next time the terminal device needs to send uplink data, so that it is beneficial to reduce the feedback delay of the network device to the uplink data, thereby improving system performance.
  • the method before the network device receives the uplink data sent by the terminal device, the method further includes:
  • the network device sends the second downlink control information to the terminal device.
  • the value of the at least one bit is 0, and the second downlink control information is used by the network device to schedule the physical uplink. Shared channel
  • the terminal device receives the second downlink control information that is sent by the network device, where the value of the at least one bit is 0 in the first bit of the second downlink control information, and the second downlink control information is used to schedule the physics.
  • Uplink shared channel ;
  • the terminal device sends the uplink data to the network device according to the second downlink control information.
  • the downlink control information that is sent by the network device to the terminal device may be divided into the first downlink control information and the second downlink control information.
  • the first downlink control information is used by the network device to feed back whether the uplink data sent by the terminal device is correctly received.
  • the first downlink control information may not be used by the network device to schedule a physical uplink shared channel.
  • the first downlink control information may also be used for the physical uplink shared channel that the network device schedules retransmission.
  • the second downlink control information is used by the network device to schedule a physical uplink shared channel.
  • the first downlink control information may be sent at any time after the network device determines whether the uplink data is correctly received.
  • the second downlink control information can only be sent when the network device schedules the terminal device for data transmission.
  • the value of the first bit in the first control information is set to 1 by using the first bit in the second downlink control information, and the value of the first bit is not 1. Therefore, the terminal device can distinguish the first downlink control information and the second downlink control information.
  • the terminal device may determine that the received downlink control information is feedback control information, where the value of the first bit is not all 1, that is, at least one bit of the first bit.
  • the terminal device may determine that the downlink control information is the second downlink control information of the data scheduling.
  • the network device may send the first downlink control information to the terminal device, and feedback the receiving condition of the uplink data, without As in the prior art, the next time the terminal device needs to send uplink data, the feedback is delayed, which is beneficial to reducing the feedback delay of the network device to the uplink data, thereby improving system performance.
  • the first downlink control information is only used to indicate a positive response to the uplink data, where the first downlink control information further includes a hybrid automatic repeat request (HARQ process).
  • HARQ process hybrid automatic repeat request
  • the number indication bit, the HARQ process number indication bit is used to indicate the HARQ process corresponding to the uplink data.
  • the bits of the first downlink control information in addition to the existing padding bits, the first bit, and downlink control information used to distinguish the scheduled physical downlink shared channel
  • the format and the flag of the downlink control information format of the physical uplink shared channel and the HARQ process number indication bit are used, and the remaining bits are reserved bits, or all values are 1, or all values are 0.
  • the network device when the network device needs to feed back the ACK for the correct reception of the uplink data, the first DCI is sent, and the first DCI is only used to indicate that the uplink data is correctly received, that is, an acknowledgement of the network device.
  • the network device may retransmit the uplink data by using the NDI bit in the existing manner, that is, implicitly feedback the uplink data error receiving through the NDI bit, at this time in the DCI.
  • the first bit is not all ones.
  • the terminal device When the terminal device receives the DCI, if the first bit in the DCI is detected to be 1, the UE considers that the DCI indicates an ACK, that is, the uplink data of the HARQ process for which the UE is correctly received by the network device.
  • the first downlink control information may include, in addition to the first bit, a downlink control information format for scheduling the physical downlink shared channel and a downlink control information format for scheduling the physical uplink shared channel, and the HARQ.
  • the process number indicates the bit.
  • padding bits may or may not be included.
  • the padding bit is used to expand the number of bits included in the first downlink control information, so that the number of bits included in the first downlink control information reaches a target value.
  • the first downlink control information includes padding bits, the number of padding bits existing in the bits of the first downlink control information is greater than zero.
  • the first downlink control information does not include padding bits, the number of padding bits existing in the bits of the first downlink control information is 0.
  • the flag of the downlink control information format for scheduling the physical downlink shared channel and the downlink control information format for scheduling the physical uplink shared channel are 0, which generally indicates that the format of the downlink control information is a scheduling physical uplink shared channel.
  • the downlink control information format is used to distinguish between the downlink control information format for scheduling the physical downlink shared channel and the downlink control information format for scheduling the physical uplink shared channel, and the flag of the downlink control information format is 1, which generally indicates that the format of the downlink control information is a scheduled physical downlink shared channel.
  • the downlink control information format. In the first downlink control information, the flag of the downlink control information format for scheduling the physical downlink shared channel and the downlink control information format for scheduling the physical uplink shared channel are 0.
  • the remaining bits included in the first downlink control information may be reserved bits, and may all have a value of 1 or a value of 0, which is not limited in this embodiment of the present application.
  • the embodiment of the present application does not limit this.
  • the first downlink control information further includes a feedback indication bit, where the feedback indication bit is used to indicate that the network device acknowledges or negatively acknowledges the uplink data.
  • the uplink data includes uplink data corresponding to N HARQ processes, where the number of the feedback indication bits is N, and N bits of the feedback indication bit are used respectively. Instructing the network device to acknowledge or negatively acknowledge the uplink data corresponding to the N HARQ processes, and N is an integer greater than 1.
  • the foregoing first downlink control information may be correct for uplink data corresponding to one HARQ process.
  • the feedback is received, and the uplink data corresponding to the multiple HARQ processes may be fed back.
  • the number of the feedback indication bits included in the first downlink control information is N, and one bit corresponds to one HARQ process. .
  • the network device can feed back the uplink data corresponding to the multiple HARQ processes to the terminal device in a downlink control information, so as to reduce the feedback overhead of the network device and improve the feedback efficiency of the network device.
  • the remaining bits are reserved except for the existing padding bits, the first bit, the downlink control information format for distinguishing the physical downlink shared channel, and the flag of the downlink control information format for scheduling the physical uplink shared channel, and the feedback indication bit. Bit, or a value of 1, or a value of 0; or
  • the first bit a downlink control information format for distinguishing the scheduled physical downlink shared channel, and a flag bit for scheduling the downlink control information format of the physical uplink shared channel, the feedback indication bit, and the indication for retransmission
  • the bits of the scheduling information of the uplink data are the reserved bits, or the values are all 1, or the value is 0.
  • the bits of the scheduling information for indicating the retransmitted uplink data are included to indicate the following. At least one bit of information:
  • Resource allocation modulation and coding mode, number of repetitions, and number of sub-frame repetitions of downlink control information.
  • the N is equal to two.
  • the number of the feedback indication bits is 2, and the 2 bits of the feedback indication bit are respectively used to indicate an acknowledgement or a negative response of the network device to the uplink data corresponding to the two HARQ processes.
  • the number of the feedback indication bits is 1, and the first downlink control information further includes a HARQ process number indication bit, where the HARQ process number indication bit is used to indicate the The HARQ process corresponding to the uplink data.
  • the first downlink control information when the first downlink control information is used to feed back the uplink data corresponding to the one HARQ process, the first downlink control information may further carry a HARQ process number indication bit, which is used to indicate the current feedback. The corresponding HARQ process.
  • the network device and the terminal device may determine, according to a predetermined rule, each feedback indication bit in the first control information. One-to-one correspondence between the uplink data of each HARQ process in the HARQ process, or the network device allocates the one-to-one correspondence to the terminal device.
  • the terminal device may directly determine, according to the one-to-one correspondence, a feedback indication bit corresponding to uplink data of each HARQ process in the multiple HARQ processes, and according to the feedback The indication bit determines whether the corresponding uplink data is correctly received by the network device.
  • the first bit a downlink control information format for distinguishing the scheduled physical downlink shared channel, and a flag bit for scheduling the downlink control information format of the physical uplink shared channel, the feedback indication bit, and the HARQ process number indication bit
  • the remaining bits are reserved bits, or all values are 1, or the value is 0; or
  • the first bit a downlink control information format for distinguishing the scheduled physical downlink shared channel, and a flag bit for scheduling the downlink control information format of the physical uplink shared channel, the feedback indication bit, and the indication for retransmission
  • the bits of the scheduling information of the uplink data and the HARQ process number indication bits, the remaining bits are reserved bits, or all of the values are 1, or the value is 0, wherein the scheduling of the uplink data for indicating retransmission is used.
  • the bits include bits for indicating at least one of the following:
  • Resource allocation modulation and coding mode, number of repetitions, and number of sub-frame repetitions of downlink control information.
  • the foregoing first downlink control information may be used only for the network device to feed back whether the uplink data is correctly received, or may be used for the network device to feed back whether the uplink data is correctly received, and the network device feeds back the NACK.
  • the method is further configured to schedule the terminal device to retransmit the uplink data. Therefore, the first downlink control information may further include a bit for indicating scheduling information of the retransmitted uplink data, but the embodiment of the present application does not limit this.
  • the feedback indication bit is in a bit of the first downlink control information, except for a padding bit that exists, the first bit, a downlink control information format used to distinguish the scheduled physical downlink shared channel, and A flag of a downlink control information format of the physical uplink shared channel and a plurality of bits other than the hybrid automatic repeat request HARQ process number indication bit are scheduled.
  • the multiple bits are in the bits of the first downlink control information, except for the existing padding bits, the first bit, the downlink control information format used to distinguish the scheduled physical downlink shared channel, and the scheduling of the physical uplink shared channel.
  • the HARQ process number indication bit is used to indicate the HARQ process corresponding to the uplink data.
  • the value of the feedback indication bit is 1 for indicating a positive response to the uplink data
  • the value of the feedback indication bit is 0 for indicating a negative response to the uplink data.
  • the value of the feedback indication bit is 0 to indicate an acknowledgement to the uplink data
  • the value of the feedback indication bit is 1 to indicate a negative response to the uplink data.
  • the number of the feedback indication bits is greater than one, and is used to indicate an acknowledgement or a negative acknowledgement of the uplink data corresponding to the HARQ process indicated by the HARQ process number indication bit.
  • the values of the bits of the feedback indication bit are the same.
  • the number of bits of the first downlink control information is equal to the number of bits of the second downlink control information, and the first bit of the first downlink control information is The location is the same as the location of the first bit of the second downlink control information; and/or,
  • the first downlink control information has the same format as the second downlink control information.
  • the terminal device by setting the number of bits of the first downlink control information to be the same as the bit data of the DCI of the scheduling data, or the format is the same, the terminal device does not increase the blind detection of the first downlink control information. Degree, achieve compatibility with the DCI of the scheduled data.
  • the first bit of the second downlink control information is a bit used to indicate a modulation and coding mode; and/or the number of the first bit is 4.
  • the first bit of the second downlink control information is all bits or partial bits of the domain used to indicate resource allocation;
  • the first bit of the second downlink control information is all bits or partial bits of a field for indicating resource allocation and modulation and coding mode.
  • the resource of the physical uplink shared channel indicated by the first bit first state of the second downlink control information is a resource of less than 12 subcarriers.
  • the number of the first bits is 9 or 11; or
  • the number of the first bits is greater than or,
  • the number of the first bits is among them, Indicates the number of physical resource blocks included in the uplink system bandwidth.
  • the downlink control information format for scheduling the physical downlink shared channel and the downlink control information for scheduling the physical uplink shared channel are used in the bit of the first downlink control information.
  • the format flag has a value of 0.
  • the downlink control information format used to distinguish the physical downlink shared channel and the downlink control information format of the physical uplink shared channel are used to distinguish the control information format. 0B and the flag of control information format 6-1B.
  • the network device may send the first downlink control information to the terminal device, and feed back the uplink data.
  • the receiving situation does not need to wait until the next time the terminal device needs to send uplink data as in the prior art, which is beneficial to reduce the feedback delay of the network device to the uplink data, thereby improving system performance.
  • a network device in a third aspect, has a function of implementing network device behavior in the foregoing method aspect, and includes a component corresponding to the step or function described in the foregoing method aspect.
  • the steps or functions may be implemented by software, or by hardware, or by a combination of hardware and software.
  • the network device described above includes one or more processors and transceiver units.
  • the one or more processors are configured to support the network device to perform corresponding functions in the above methods. For example, generate a DCI.
  • the transceiver unit is configured to support the network device to communicate with other devices to implement a receiving/transmitting function. For example, the DCI generated by the processor is transmitted.
  • the base station may further include one or more memories, where the memory is coupled to the processor, which stores necessary program instructions and data of the base station.
  • the one or more memories may be integrated with the processor or may be separate from the processor. This application is not limited.
  • the network device may be a base station or a TRP
  • the transceiver unit may be a transceiver or a transceiver circuit.
  • the network device can also be a communication chip.
  • the transceiver unit may be an input/output circuit or interface of a communication chip.
  • the above network device includes a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal for storing a computer program, the processor for calling and running the computer program from the memory, such that the network device performs the first aspect, any one of the first aspects The method of completing the network device in the mode.
  • a terminal device is provided.
  • the terminal device provided by the present application has a function for implementing the behavior of the terminal device in the foregoing method aspect, and includes a component corresponding to the step or function described in the foregoing method aspect.
  • the steps or functions may be implemented by software, or by hardware, or by a combination of hardware and software.
  • the above terminal device includes one or more processors and transceiver units.
  • the transceiver unit is configured to support the terminal device to communicate with other devices to implement a receiving/transmitting function. For example, receive DCI.
  • the one or more processors are configured to support the terminal device to perform a corresponding function in the above method. For example, according to The DCI determines the feedback of the uplink data.
  • the terminal device may further include one or more memories, and the memory is configured to be coupled to the processor, which stores necessary program instructions and data of the base station.
  • the one or more memories may be integrated with the processor or may be separate from the processor. This application is not limited.
  • the terminal device may be a UE or the like, and the transceiver unit may be a transceiver or a transceiver circuit.
  • the terminal device can also be a communication chip.
  • the transceiver unit may be an input/output circuit or interface of a communication chip.
  • the above terminal device includes a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal for storing a computer program, the processor for calling and running the computer program from the memory, such that the terminal device performs any of the possible implementations of the first aspect of the first aspect The method in which the terminal device is completed.
  • a system comprising the above terminal device and a network device.
  • a computer program product comprising: a computer program (which may also be referred to as a code, or an instruction), when the computer program is executed, causing the computer to perform the first aspect of the first aspect described above Any of the possible implementations.
  • a computer readable medium storing a computer program (which may also be referred to as a code, or an instruction), when executed on a computer, causes the computer to perform the first aspect, first Any of the possible implementations of the aspect.
  • the present application provides a chip system including a processor for supporting a network device to implement the functions involved in the above aspects, such as, for example, receiving or processing data and/or processing involved in the above method. information.
  • the chip system further includes a memory for storing necessary program instructions and data of the network device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the present application provides a chip system including a processor for a terminal device to implement the functions involved in the above aspects, such as, for example, transmitting or processing data and/or information involved in the above method.
  • the chip system further comprises a memory for storing necessary program instructions and data of the terminal device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • FIG. 1 is a schematic diagram of a system scenario applicable to an embodiment of the present application.
  • FIG. 2 is a schematic flow chart of a method of data transmission according to another embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a network device in accordance with one embodiment of the present application.
  • FIG. 5 is a schematic block diagram of an apparatus in accordance with one embodiment of the present application.
  • the embodiments of the present application are applicable to various communication systems, and therefore, the following description is not limited to a specific communication system.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • Code division multiple access (WCDMA) system general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division double Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, and future fifth generation (5th generation, 5G) ) System or new radio (NR), etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD LTE frequency division duplex
  • TDD LTE time division double Time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • the embodiment of the present application is applicable, as long as one device (for example, a terminal device) transmits uplink data, another device (for example, a network device) needs to receive the uplink data, and the corresponding method is used.
  • the uplink data is correctly received for feedback, and the embodiment of the present application is not limited to the communication system described above.
  • FIG. 1 shows a schematic block diagram of a wireless communication system 100 suitable for use with embodiments of the present application.
  • the wireless communication system 100 can include a network device 110 and at least one terminal device.
  • FIG. 1 shows a case where the at least one terminal device is three devices, which are the case of the terminal devices 120, 130, and 140, respectively. The example is not limited to this.
  • the network device 110 in the embodiment of the present application may receive uplink data sent by the terminal device, where the network device may be global system of mobile communication (GSM) or code division multiple access (CDMA).
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • the base transceiver station (BTS) may also be a base station (nodeB, NB) in wideband code division multiple access (WCDMA), or may be long term evolution (LTE).
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • the base transceiver station (BTS) may also be a base station (nodeB, NB) in wideband code division multiple access (WCDMA), or may be long term evolution (LTE).
  • NB base station
  • WCDMA wideband code division multiple access
  • LTE long term evolution
  • Evolved base station eNB/eNodeB
  • a relay station or access point or an in-vehicle device, a wearable device, and a network-side device in a future 5G network or a public land mobile communication network in the future (public land)
  • a network device or the like in a mobile network for example, a transmission point (TRP or TP) in an NR system, a base station (gNB) in an NR system, or one or a group of base stations in a 5G system (including a plurality of antenna panels)
  • TRP or TP transmission point
  • gNB base station
  • the antenna panel and the like are not particularly limited in this embodiment of the present application.
  • the terminal device in the embodiment of the present application may send uplink data to the network device.
  • the terminal device may be a device that performs a machine type communication (MTC) service, and the terminal device may also be referred to as a user device.
  • MTC machine type communication
  • UE for example, Bandwidth-reduced Low-complexity UE (BL UE), Coverage Enhancement UE (CE UE);
  • the terminal device may also be referred to as an access terminal, Subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • the terminal device 120 is a user device
  • the terminal device 130 is an in-vehicle device
  • the terminal device 140 is a printer
  • the network device 110 in the embodiment of the present application may also be a terminal device as described above.
  • the communication between the network device and the terminal device may be evolved into communication between the terminal devices.
  • It may also be referred to as machine to machine (M2M), or inter-device communication (D2D).
  • M2M machine to machine
  • D2D inter-device communication
  • the network device needs to feed back whether the uplink data is correctly received, so that in case of feedback error reception, the terminal device needs to retransmit the data, and if the feedback is correctly received, No terminal device is required to retransmit data.
  • the network device can indicate whether the uplink data scheduled by the DCI is newly transmitted data or the data transmitted last time by the process through the NDI of 1 bit in the DCI.
  • the DCI is used to schedule data, that is, the network device sends the DCI only when there is data scheduling, and the network device can be scheduled by the network device if the network device incorrectly receives the uplink data.
  • the network device correctly receives the uplink data sent by the terminal device
  • the network device does not have a new uplink data scheduling
  • the network device does not send a DCI scheduling new transmission, thereby feeding back the correct reception of the uplink data
  • the network device sends the DCI that schedules the new uplink data to implicitly receive the correct reception of the uplink data, so that the terminal device may not be able to know in time whether the uplink data is correctly received by the network device. That is, there is a large delay in the feedback of the network device to the uplink data.
  • the embodiment of the present application subtly proposes a data transmission method, which can provide timely feedback of uplink data by sending control information (for example, DCI), and can send control information without waiting for data scheduling, thereby reducing network equipment's uplink data. Feedback delay.
  • control information for example, DCI
  • the method shown in FIG. 2 includes:
  • the terminal device sends uplink data.
  • the network device receives the uplink data.
  • the network device first generates downlink control information for uplink data scheduling, for example, second downlink control information, where the second downlink control information is used by the network device to schedule a physical uplink shared channel. Then, the network device sends the second downlink control information to the terminal device, and after acquiring the second downlink control information, the terminal device sends the uplink data to the network device according to the second downlink control information.
  • second downlink control information for uplink data scheduling
  • the network device sends first downlink control information to the terminal device.
  • the first bit of the first downlink control information has a value of 1, and the number of the first bit is greater than or equal to 1.
  • the first bit is used to indicate that the first downlink control information is used. Instructing the network device to acknowledge or negatively acknowledge the uplink data.
  • the terminal device receives the first downlink control information.
  • the terminal device may determine, according to the first downlink control information, whether the uplink data is correctly received by the network device.
  • the terminal device sends uplink data to the network device, and the network device receives the uplink data, and sends, to the terminal device, first downlink control information with a first bit value of 1.
  • the terminal device receives the downlink control information sent by the network device, and determines that the downlink control information is the first downlink control information according to the first bit of the downlink control information, and further determines the first downlink control according to the first downlink control.
  • the information determines whether the network device correctly receives the uplink data.
  • the network device may send the first downlink control information by using a physical downlink channel, where the physical downlink channel may be a PDCCH or an MPDCCH, and the embodiment of the present application is not limited thereto.
  • the first downlink control information may also be referred to as downlink control information for feedback, where the first downlink control information indicates that the first downlink control is performed by using a first bit value of 1.
  • the information is used to indicate a positive response or a negative response of the network device to the uplink data.
  • the second downlink control information is control information of the data scheduling, and the value of the at least one bit of the first bit in the second downlink control information is 0.
  • the downlink control information that is sent by the network device to the terminal device may be divided into the first downlink control information and the second downlink control information.
  • the first downlink control information is used by the network device to feed back whether the uplink data sent by the terminal device is correctly received.
  • the first downlink control information may not be used by the network device to schedule a physical uplink shared channel.
  • the first downlink control information may also be used for the physical uplink shared channel that the network device schedules retransmission.
  • the second downlink control information is used by the network device to schedule a physical uplink shared channel.
  • the first downlink control information may be sent at any time after the network device determines whether the uplink data is correctly received.
  • the second downlink control information can only be sent when the network device schedules the terminal device for data transmission.
  • the value of the first bit in the first control information is set to 1 by using the first bit in the second downlink control information, and the value of the first bit is not 1. Therefore, the terminal device can distinguish the first downlink control information and the second downlink control information.
  • the terminal device may determine that the received downlink control information is the first downlink control information for feedback, where the value of the first bit is not all one, that is, the first When the value of at least one bit in the bit is 0, the terminal device may determine that the downlink control information is the second downlink control information used for data scheduling.
  • the network device may send the first downlink control information to the terminal device, and feedback the receiving condition of the uplink data, without As in the prior art, the next time the terminal device needs to send uplink data, the feedback is delayed, which is beneficial to reducing the feedback delay of the network device to the uplink data, thereby improving system performance.
  • the format of the first downlink control information may be the same as the format of the second downlink control information, for example, 6-0B.
  • the number of bits of the first downlink control information is equal to the number of bits of the second DCI, and the location of the first bit of the first downlink control information and the DCI of the scheduling data. The position of the first bit is the same.
  • the terminal device by setting the number of bits of the first downlink control information to be the same as the bit data of the DCI of the scheduling data, or the format is the same, the terminal device does not increase the blind detection of the first downlink control information. Degree, achieve compatibility with the DCI of the scheduled data.
  • the terminal device needs to distinguish whether the acquired control information is feedback control information or data scheduling control information.
  • the terminal device may determine that the received downlink control information is the first downlink control information for feedback, where the value of the first bit is not all one, that is, the first When the value of at least one bit in the bit is 0, the terminal device may determine that the downlink control information is the second downlink control information used for data scheduling.
  • the format of the downlink control information of the scheduling data that is, the format of the second downlink control information DCI in the embodiment of the present application is first introduced in conjunction with Table 1 to Table 3. It should be understood that, in this document, DCI is used as an abbreviation of downlink control information, but the downlink control information of the present application is not limited thereto.
  • the information included in the second DCI is as shown in Tables 1 to 3.
  • the format of the second DCI of Table 1 is 6-0B.
  • the format of the second DCI of Table 2 and Table 3 may be 6-0B, or may not be 6-0B.
  • Table 1 shows the DCI format 6-0B a second DCI containing domain and the number of bits contained in each domain.
  • the field included in the DCI format 6-0B includes the distinguishing flag bits of 6-0B and 6-1B, and the field for indicating resource block allocation, modulation and coding mode MCS, repetition number, HARQ process number, NDI, and DCI subframe repetition number. .
  • Table 2 shows the fields contained in another second DCI and the number of bits contained in each field.
  • the domain included in the DCI includes a DCI format for scheduling the PDSCH and a flag for the DCI format for scheduling the PUSCH, and a field for indicating the MCS and resource allocation, the number of repetitions, the HARQ process number, the NDI, and the number of DCI subframe repetitions.
  • M is a positive integer.
  • Optional M is greater than Optional, or
  • the DCI includes a domain that includes a DCI format for scheduling a PDSCH and a flag for a DCI format for scheduling a PUSCH, a resource allocation for a narrowband indication and a narrowband, an MCS, a repetition number, a HARQ process number, an NDI, and a DCI subframe repetition number.
  • N is a positive integer.
  • N is greater than
  • the granularity of resources allocated by resource block allocation in Table 1 is PRB, where, in Table 1, The bits are used to indicate the assigned narrowband and 3 bits are used to indicate the physical resource blocks allocated in the narrowband.
  • the MCS and resources are assigned as one domain.
  • the value of the MCS and the resource allocation bit indicates the MCS used by the PUSCH and the allocated resource.
  • the value of the MCS and the allocated bits of the resource may be jointly encoded by the MCS used by the PUSCH and the allocated resources.
  • the resources allocated by the MCS and the resource allocation bits for the PUSCH may be resources of S subcarriers, and S is a positive integer of ⁇ 12.
  • the MCS and resource allocated bits may indicate resources allocated for the PUSCH in units of PRBs, and may also indicate resources allocated for the PUSCH in units of one or more subcarriers.
  • the resources allocated by the MCS and the resource allocation bits for the PUSCH may be resources allocated within the entire system bandwidth; or may be included in the MCS and resource allocation bits.
  • the bits are used for the narrow band of indication, and the remaining bits indicate the resources allocated within the narrow band.
  • the number of bits in the resource allocation field is N, where the number of Ns may be pre-configured by the system or calculated.
  • the embodiment of the present application does not limit the value of N.
  • N may be and many more.
  • the resource allocated for the PUSCH indicated by the bit of the resource allocation in the DCI may be a resource of S subcarriers, and S is a positive integer of ⁇ 12.
  • the resource allocation bits in the DCI may indicate resources allocated for the PUSCH in units of PRBs, and may also indicate resources allocated for the PUSCH in units of one or more subcarriers.
  • the resource allocated bits are bits that only support the allocation of resources for the PUSCH in units of one or more subcarriers.
  • the resource allocated for the PUSCH indicated by the bit of the resource allocation may be a resource allocated within the entire system bandwidth, or may be included in the bit allocated by the resource.
  • the bits are used for the narrow band of indication, and the remaining bits indicate the resources allocated within the narrow band. .
  • the values of the bits have invalid values.
  • a value of a bit is an invalid value.
  • the value of the bit is not the value.
  • the value of the bit is the binary value of the bit, or the value of the bit.
  • the 4-digit representation of the MCS is the index I MCS of the MCS .
  • I MCS >10 is an invalid value for the BL/CE UE of CE mode B.
  • the value of the bit allocated by the resource is all "1", which is a meaningless invalid value state.
  • the embodiment of the present application proposes that the bit is used as the first bit, so that the value of the first bit of the first DCI is all one, and the value of the first bit in the second DCI is all the value of the invalid value. .
  • the terminal device determines that the acquired DCI is the first DCI by using all the first bits, and the first bit is not all 1, and then determines that the acquired DCI is the second DCI.
  • the first bit may be all bits or partial bits of the domain of the DCI.
  • the first bit of the second downlink control information may be part or all of the bits used to indicate the modulation and coding mode.
  • the second downlink control information is used to indicate the 4 bits or partial bits of the MCS as the first bit. As long as the value of the first bit is 1, the value of the 4 bits of the MCS may be greater than 10.
  • the value of the 4 bits of the MCS is 1011, 1100, 1101, 1110, and 1111
  • the value is invalid, that is, in the second downlink control information of the data scheduling
  • the 4 bits of the MCS are taken.
  • the value will not equal the above value. Therefore, in the embodiment of the present application, when the first bit is taken as 1, the value of the four bits can be ensured to be greater than 10.
  • the first bit can be used to indicate that the downlink control information is used to indicate the positive response to the uplink data. Or negating the first downlink control information received by the response.
  • the first bit includes 4 bits, in this case, in the first DCI, the first bit takes a value of 1111; in the second DCI, the second DCI The first bit is used to indicate the MCS.
  • the first bit may include a part of the bits in the second DCI for indicating the MCS, for example, the first bit includes the first two bits in the second DCI for indicating the MCS (also It can be referred to as two bits of the upper bit, that is, in the case where the first two bits are 1, the value of 11 bits of the bit for indicating the MCS is 11xx, where x can take 0 or 1 .
  • the first bit may comprise three bits, for example comprising the first two of the four bits of the second DCI for indicating the bits of the MCS, and any one of the remaining bits.
  • the first bit includes a first bit and a third and fourth bit of the second DCI for indicating the MCS.
  • the first bit of the second downlink control information may be all bits or partial bits of a field for indicating resource allocation and modulation and coding mode.
  • the first bit of the second downlink control information is all bits or partial bits of the domain used to indicate resource allocation.
  • the number of the first bits is 9 or 11; or, the number of the first bits is greater than Or, the number of the first bits is
  • the first downlink control information is only used to indicate a positive response to the uplink data, and the first downlink control information further includes a hybrid automatic repeat request (HARQ process).
  • HARQ process hybrid automatic repeat request
  • the number indication bit, the HARQ process number indication bit is used to indicate a HARQ process corresponding to the uplink data.
  • the first bit in the bits of the first downlink control information, except for the existing padding bits, the first bit, a downlink control information format used to distinguish the scheduled physical downlink shared channel, and a downlink for scheduling the physical uplink shared channel.
  • the remaining bits are reserved bits, or all values are 1, or the values are all 0.
  • the first DCI is used to indicate that the uplink data is correctly received, that is, an acknowledgement of the network device.
  • the network device may retransmit the uplink data by using the NDI bit in the existing manner, that is, implicitly feedback the uplink data error receiving through the NDI bit, at this time in the DCI.
  • the first bit is not all ones.
  • the first downlink control information may include, in addition to the first bit, a downlink control information format for scheduling the physical downlink shared channel and a downlink control information format for scheduling the physical uplink shared channel, and the HARQ.
  • the process number indicates the bit.
  • padding bits may or may not be included.
  • the padding bit is used to expand the number of bits included in the first downlink control information, so that the number of bits included in the first downlink control information reaches a target value.
  • the first downlink control information includes padding bits, the number of padding bits existing in the bits of the first downlink control information is greater than zero.
  • the first downlink control information does not include padding bits, the number of padding bits existing in the bits of the first downlink control information is 0.
  • the format of the downlink control information format for scheduling the physical downlink shared channel and the downlink control information format for scheduling the physical uplink shared channel are 0, which generally indicates that the format of the downlink control information is scheduling physical uplink sharing.
  • the downlink control information format of the channel; the downlink control information format used to distinguish the physical downlink shared channel and the downlink control information format of the physical uplink shared channel are set to 1, which generally indicates that the format of the downlink control information is the scheduling physical downlink.
  • the downlink control information format of the shared channel In the first downlink control information, a flag for distinguishing between a downlink control information format for scheduling the physical downlink shared channel and a downlink control information format for scheduling the physical uplink shared channel is 0.
  • the remaining bits included in the first downlink control information may be reserved bits, and may all have a value of 1 or a value of 0, which is not limited in this embodiment of the present application.
  • the embodiment of the present application does not limit this.
  • Table 4 - Table 6 is a possible implementation manner of the first DCI and the second DCI in the embodiment of the present application.
  • the first DCI is used to indicate a positive response of the network device to the uplink data.
  • the domain included in the first DCI may be the same as the domain included in the second DCI, or may be different from the domain included in the second DCI or have a different name.
  • the number of bits of the second DCI is the same as the number of bits of the first DCI.
  • the bits of the second DCI correspond to the bits of the first DCI.
  • Table 4 - Table 6 shows the values of the bits of each field in the second DCI in the first DCI.
  • the distinguishing flag bit of the DCI formats 6-0B and 6-1B is 0, indicating that the format of the DCI is 6-0B. Or distinguish between the DCI format for scheduling the PDSCH and the flag for the DCI format for scheduling the PUSCH to be 0.
  • the case where the first bit is the MCS field is shown in Table 4, and the case where the first bit is the all bits or partial bits of the MCS and the resource allocation field is shown in Table 5, and the first bit is shown as a resource in Table 6.
  • the first bit all ones.
  • the field for indicating the HARQ process number includes one HARQ process number indication bit.
  • the terminal device may first determine that the distinguishing flag bits of 6-0B and 6-1B in the DCI are 0 or distinguish the DCI format and the scheduling PUSCH of the scheduling PDSCH.
  • the flag bit of the DCI format is 0, and according to the first bit being 1, the DCI is determined to be the first DCI, that is, the DCI used for feedback, because the first DCI is sent by the network device when the uplink data is correctly received.
  • the terminal device can directly determine, according to the first DCI, that the network device has correctly received the uplink data, and does not need to indicate by using the feedback indication bit.
  • the remaining bits in one of the embodiments DCI take a value of '1'.
  • Another embodiment is that the remaining bits are set to all '0'.
  • the embodiments of the present application are not limited thereto.
  • the first downlink control information further includes a feedback indication bit, where the feedback indication bit is used to indicate that the network device acknowledges or negatively responds to the uplink data.
  • the first downlink control information may not carry a feedback indication bit, or feedback exists in the first downlink control information. Indication bit, However, the feedback indication bits have a value of 0 or both.
  • the first downlink control information needs to include a feedback indication bit, where the first downlink control information is used to indicate a positive response or a negative response to the uplink data, where the feedback indication bit is specifically used to indicate a location of the network device.
  • the feedback of the uplink data is a positive acknowledgement ACK or a negative acknowledgement NACK.
  • the uplink data includes uplink data corresponding to N HARQ processes, the number of the feedback indication bits is N, and the N bits of the feedback indication bit are used to indicate The network device acknowledges or negatively acknowledges the uplink data corresponding to the N HARQ processes, and N is an integer greater than 1.
  • the first downlink control information may be used for feedback whether the uplink data corresponding to one HARQ process is correctly received, or may be fed back for whether the uplink data corresponding to multiple HARQ processes is correctly received.
  • the number of the feedback indication bits included in the first downlink control information is N, and one bit corresponds to one HARQ process. .
  • the network device can feed back the uplink data corresponding to the multiple HARQ processes to the terminal device in a downlink control information, so as to reduce the feedback overhead of the network device and improve the feedback efficiency of the network device.
  • N 2.
  • CE mode B there are at most two HARQ processes corresponding to the uplink data.
  • the number of the feedback indication bits is 2, and the 2 bits of the feedback indication bit are respectively used to indicate an acknowledgement or a negative response of the network device to the uplink data corresponding to the 2 HARQ processes.
  • the remaining bits are included in addition to the padding bits, the first bit, the downlink control information format for scheduling the physical downlink shared channel, and the flag of the downlink control information format for scheduling the physical uplink shared channel, and the feedback indication bit. Is a reserved bit, or a value of 1, or a value of 0; or
  • the remaining bits are reserved bits, or all of the values are 1, or all values are 0, wherein the bits for indicating the scheduling information of the retransmitted uplink data include A bit indicating at least one of the following information:
  • Resource allocation modulation and coding mode, number of repetitions, and number of sub-frame repetitions of downlink control information.
  • the number of the feedback indication bits is 1, the first downlink control information further includes a HARQ process number indication bit, and the HARQ process number indication bit is used to indicate that the uplink data corresponds to The HARQ process.
  • the first downlink control information when the first downlink control information is used to feed back the uplink data corresponding to the one HARQ process, the first downlink control information may further carry a HARQ process number indication bit, which is used to indicate the current feedback. The corresponding HARQ process.
  • the network device and the terminal device may determine, according to a predetermined rule, each feedback indication bit in the first control information and the The one-to-one correspondence between the uplink data of each of the plurality of HARQ processes, or the one-to-one correspondence between the network devices and the terminal device.
  • the terminal device may directly determine the feedback indication bit corresponding to the uplink data of each HARQ process in the multiple HARQ processes according to the one-to-one correspondence, and according to the The feedback indication bit determines the corresponding number of uplinks According to whether it is correctly received by the network device.
  • the remaining bits are reserved bits, or all values are 1, or the value is 0; or
  • the first bit a downlink control information format for distinguishing the scheduled physical downlink shared channel, and a flag bit for scheduling the downlink control information format of the physical uplink shared channel
  • the feedback indication bit for indicating
  • the bits of the scheduling information of the transmitted uplink data and the HARQ process number indication bits, the remaining bits are reserved bits, or all values are 1, or all values are 0, wherein the information is used to indicate retransmission.
  • the bits of the scheduling information of the uplink data include bits for indicating at least one of the following:
  • Resource allocation modulation and coding mode, number of repetitions, and number of sub-frame repetitions of downlink control information.
  • the foregoing first downlink control information may be used only for the network device to feed back whether the uplink data is correctly received, or may be used for the network device to feed back whether the uplink data is correctly received, and the network device feeds back the NACK.
  • the method is further configured to schedule the terminal device to retransmit the uplink data. Therefore, the first downlink control information may further include a bit for indicating scheduling information of the retransmitted uplink data, but the embodiment of the present application does not limit this.
  • the feedback indication bit is in the bit of the first downlink control information, except for the existing padding bit, the first bit, and downlink control for distinguishing the scheduled physical downlink shared channel.
  • the multiple bits are in the bits of the first downlink control information, except for the existing padding bits, the first bit, and the downlink control information format and scheduling used to distinguish the scheduled physical downlink shared channel.
  • the HARQ process number indication bit is used to indicate a HARQ process corresponding to the uplink data.
  • the value of the feedback indication bit is 1 for indicating a positive response to the uplink data
  • the value of the feedback indication bit is 0 for indicating a negative response to the uplink data.
  • the value of the feedback indication bit is 0 to indicate a positive response to the uplink data
  • the value of the feedback indication bit is 1 to indicate a negative response to the uplink data.
  • the number of the feedback indication bits is greater than one, and is used to indicate an acknowledgement or a negative response to the uplink data corresponding to the HARQ process indicated by the HARQ process number indication bit.
  • the values of the respective bits of the feedback indication bit are the same.
  • the bit values of the first DCI for indicating ACK or NACK are described in conjunction with Tables 7 to 10, wherein the feedback is included in Tables 7 to 10. Indicates a bit, and the feedback indication bit is 1 bit, that is, a case corresponding to uplink data feedback for one HARQ process.
  • Table 7 - Table 10 is a possible implementation manner of the first DCI and the second DCI in the embodiment of the present application.
  • the first DCI is used to indicate a positive or negative response of the network device to the uplink data.
  • the domain included in the first DCI may be the same as the domain included in the second DCI, or may be different from the domain included in the second DCI or have a different name.
  • the number of bits of the second DCI is the same as the number of bits of the first DCI.
  • the bits of the second DCI correspond to the bits of the first DCI.
  • Table 7 - Table 10 shows the values of the bits of each field in the second DCI in the first DCI.
  • the distinguishing flag bit of the DCI formats 6-0B and 6-1B is 0, indicating that the format of the DCI is 6-0B. Or distinguish between the DCI format for scheduling the PDSCH and the flag for the DCI format for scheduling the PUSCH to be 0.
  • Table 7 and Table 8 show the case where the first bit is the MCS field, and Table 9 shows the case where the first bit is the all bits or partial bits of the MCS and the resource allocation field, and the first table is shown in Table 10.
  • the bit is the case where all bits or partial bits of the domain are allocated to the resource. And the first bit, all ones.
  • the field for indicating the HARQ process number includes one HARQ process number indication bit.
  • Table 7 to Table 10 further include a bit feedback indication bit, and the feedback indication bit may be a padding bit existing, a first bit, a downlink control information format used to distinguish the scheduled physical downlink shared channel, and a scheduling physical uplink.
  • the feedback indication bit in Table 7 is the upper one bit in the resource block allocation field, and one bit in the NDI field in Table 8 to Table 10.
  • the remaining bits are reserved bits, or all values are 1, or all values are 0.
  • the remaining bits in the DCI take a value of '1'.
  • the remaining bits in the DCI take a value of '0'.
  • the first DCI in the embodiment of the present application may be used to schedule the terminal device to retransmit the uplink data, when the feedback bit of the first DCI is fed back to the NACK. Therefore, the first downlink control information may further include a bit for indicating scheduling information of the retransmitted uplink data, but the embodiment of the present application does not limit this.
  • the padding bits existing in the first DCI, the first bit, the downlink control information format used to distinguish the scheduled physical downlink shared channel, and the downlink control information for scheduling the physical uplink shared channel The flag of the format, the feedback indication bit, the bit indicating the HARQ process number, and the bit of the scheduling information for indicating the retransmitted uplink data, the remaining bits are reserved bits, or the values are all 1, or values All are 0, wherein the bit of the scheduling information for indicating the retransmitted uplink data includes a bit for indicating at least one of the following information:
  • Resource allocation modulation and coding mode, number of repetitions, and number of sub-frame repetitions of downlink control information.
  • the scheduling retransmission may be further indicated, and the DCI that schedules retransmission is avoided from being sent again, which can save signaling overhead.
  • the terminal device may first determine the distinguishing flag bits of 6-0B and 6-1B in the DCI or distinguish the DCI format of the scheduled PDSCH and the DCI of the scheduled PUSCH.
  • the flag of the format is 0, and according to the first bit is 1, the DCI is determined to be the first DCI, that is, the DCI used for feedback, and finally, the feedback of the network device is determined according to the 1-bit indication corresponding to the feedback indication bit. Is ACK or NACK.
  • the bit values of the first DCI for indicating ACK or NACK are described in conjunction with Tables 11 to 13, wherein the feedback is included in Tables 11 to 13. Indicates a bit, and the feedback indication bit is 2 bits, that is, a case corresponding to feedback of uplink data of 2 HARQ processes.
  • Table 11 - Table 13 are a possible implementation manner of the first DCI and the second DCI in the embodiment of the present application.
  • the first DCI Used to indicate a positive or negative response from the network device to the upstream data.
  • the domain included in the first DCI may be the same as the domain included in the second DCI, or may be different from the domain included in the second DCI or have a different name.
  • the number of bits of the second DCI is the same as the number of bits of the first DCI.
  • the bits of the second DCI correspond to the bits of the first DCI.
  • Table 11 - Table 13 shows the values of the bits of each field in the second DCI in the first DCI.
  • the distinguishing flag bit of the DCI formats 6-0B and 6-1B is 0, indicating that the format of the DCI is 6-0B. Or distinguish between the DCI format for scheduling the PDSCH and the flag for the DCI format for scheduling the PUSCH to be 0.
  • the case where the first bit is the MCS field is shown in Table 11, and the case where the first bit is the all bits or partial bits of the MCS and the resource allocation field is shown in Table 12, and the first bit is shown as a resource in Table 13.
  • the feedback indication bit includes 2 bits, corresponding to two HARQ process numbers, and the 2 bits of the feedback indication bit are respectively used to indicate the uplink data corresponding to the 2 HARQ processes by the network device. A positive response or a negative response.
  • the feedback indication bits in Tables 11 to 13 may be a flag other than the existing padding bits, the first bit, a downlink control information format for distinguishing the scheduled physical downlink shared channel, and a downlink control information format for scheduling the physical uplink shared channel. Any two of the bits outside the bit.
  • the feedback indication bits in Table 11 are the upper and the next highest bits in the resource block allocation domain, where the upper 1 bit indicates the ACK feedback or the NACK feedback of the uplink data of the HARQ process #0, and the 1st bit of the next highest bit indicates the HARQ process #1. ACK feedback or NACK feedback of the uplink data.
  • the feedback indication bit is the high order and the next highest bit in the repetition number indication field, wherein the upper 1 bit indicates the ACK feedback or the NACK feedback of the uplink data of the HARQ process #0, and the 1st bit of the next highest bit indicates the HARQ process #1.
  • ACK feedback or NACK feedback of uplink data indicates the HARQ process #1.
  • the feedback indication bit is the upper and the next highest bit in the DCI subframe repetition number field, wherein the upper 1 bit indicates the ACK feedback or the NACK feedback of the uplink data of the HARQ process #0, and the 1st bit of the next highest bit indicates the HARQ process# 1 ACK feedback or NACK feedback of uplink data.
  • the remaining bits are reserved bits, or all values are 1, or all values are 0.
  • the remaining bits in the DCI take a value of '1'.
  • the remaining bits in the DCI take a value of '0'.
  • the first DCI in the embodiment of the present application may be used to schedule the terminal device to retransmit the uplink data, when the feedback bit of the first DCI is fed back to the NACK. Therefore, the first downlink control information may further include a bit for indicating scheduling information of the retransmitted uplink data, but the embodiment of the present application does not limit this.
  • the padding bits existing in the first DCI, the first bit, the downlink control information format used to distinguish the scheduled physical downlink shared channel, and the downlink control information for scheduling the physical uplink shared channel The flag of the format, the feedback indication bit, and the bit of the scheduling information for indicating the retransmitted uplink data, the remaining bits are reserved bits, or all values are 1, or the value is 0, wherein the The bits of the scheduling information for indicating the retransmitted uplink data include bits for indicating at least one of the following:
  • Resource allocation modulation and coding mode, number of repetitions, and number of sub-frame repetitions of downlink control information.
  • the scheduling retransmission may be further indicated, and the DCI that schedules retransmission is avoided from being sent again, which can save signaling overhead.
  • the terminal device may first determine the The distinguishing flag bits of 6-0B and 6-1B in the DCI or the DCI format of the scheduling PDSCH and the DCI format of the scheduling PUSCH are 0, and then the DCI is determined to be the first DCI according to the first bit being 1. That is, the DCI used for the feedback, and finally, according to the 2-bit indication corresponding to the feedback indication bit, it is determined that the feedback of the uplink data corresponding to the two HARQs by the network device is ACK or NACK.
  • the content of the bit value when the first DCI is used to indicate ACK or NACK is described below with reference to Tables 14 to 16 for the contents of the second DCI shown in Tables 1 to 3 above.
  • the reference indication bits are included in the table 14 to the table, and the feedback indication bits are multiple bits, and the values of the multiple bits are the same, and the uplink data of one HARQ process is fed back.
  • Table 14 - Table 16 is a possible implementation manner of the first DCI and the second DCI in the embodiment of the present application.
  • the first DCI is used to indicate a positive or negative response of the network device to the uplink data.
  • the domain included in the first DCI may be the same as the domain included in the second DCI, or may be different from the domain included in the second DCI or have a different name.
  • the number of bits of the second DCI is the same as the number of bits of the first DCI.
  • the bits of the second DCI correspond to the bits of the first DCI.
  • Table 14 - Table 16 shows the values of the bits of each field in the second DCI in the first DCI.
  • the distinguishing flag bit of the DCI formats 6-0B and 6-1B is 0, indicating that the format of the DCI is 6-0B. Or distinguish between the DCI format for scheduling the PDSCH and the flag for the DCI format for scheduling the PUSCH to be 0.
  • the case where the first bit is the MCS field is shown in Table 14, and the case where the first bit is the all bits or partial bits of the MCS and the resource allocation field is shown in Table 15, and the first bit is shown as a resource in Table 16.
  • the first bit all ones.
  • the field for indicating the HARQ process number includes one HARQ process number indication bit.
  • the feedback indication bit is a flag bit in addition to the existing padding bits, the first bit, a downlink control information format for distinguishing the scheduled physical downlink shared channel, and a downlink control information format for scheduling the physical uplink shared channel, and
  • the hybrid automatic repeat request requests all bits except the HARQ process number indication bit.
  • the value of the feedback indication bit is 1 for indicating a positive response to the uplink data
  • the value of the feedback indication bit is 0 for indicating a negative response to the uplink data.
  • the value of the feedback indication bit is 0 to indicate a positive response to the uplink data
  • the value of the feedback indication bit is 1 to indicate a negative response to the uplink data.
  • the number of the feedback indication bits is greater than one, and is used to indicate an acknowledgement or a negative response to the uplink data corresponding to the HARQ process indicated by the HARQ process number indication bit.
  • the values of the respective bits of the feedback indication bit are the same.
  • the terminal device may first determine the distinguishing flag bits of 6-0B and 6-1B in the DCI or distinguish the DCI format of the scheduled PDSCH and the DCI of the scheduled PUSCH.
  • the flag of the format is 0, and according to the first bit is 1, the DCI is determined to be the first DCI, that is, the DCI used for feedback, and finally, according to the indication of the feedback indication bit, it is determined that the network device feedback is ACK or NACK.
  • FIG. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • the terminal device can be adapted for use in the system shown in FIG.
  • FIG. 3 shows only the main components of the terminal device.
  • the terminal device 10 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used for processing the communication protocol and the communication data, and controlling the entire terminal device, executing the software program, and processing the data of the software program, for example, for supporting the terminal device to perform the actions described in the foregoing method embodiments, such as And determining, according to the received downlink control information DCI, a feedback state of the uplink data.
  • Memory is primarily used to store software programs and data.
  • the control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the control circuit together with the antenna can also be called a transceiver, and is mainly used for transmitting and receiving RF signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are primarily used to receive user input data and output data to the user.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 3 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, and the like.
  • the processor may include a baseband processor and a central processing unit, and the baseband processor is mainly used to process the communication protocol and the communication data, and the central processing unit is mainly used to control and execute the entire terminal device.
  • the processor in FIG. 3 can integrate the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus.
  • the terminal device may include a plurality of baseband processors to accommodate different network standards, and the terminal device may include a plurality of central processors to enhance its processing capabilities, and various components of the terminal devices may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the functions of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • the antenna and control circuitry having the transceiving function can be considered as the transceiving unit 101 of the terminal device 10, for example, for supporting the terminal device to perform the receiving function as described in the portion of FIG.
  • the processor having the processing function is regarded as the processing unit 102 of the terminal device 10.
  • the terminal device 10 includes a transceiver unit 101 and a processing unit 102.
  • the transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver, and the like.
  • the device for implementing the receiving function in the transceiver unit 101 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 101 is regarded as a sending unit, that is, the transceiver unit 101 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.
  • the processor 102 can be configured to execute instructions stored in the memory to control the transceiver unit 101 to receive signals and/or transmit signals to perform the functions of the terminal device in the foregoing method embodiments.
  • the function of the transceiver unit 101 can be implemented by a dedicated chip through a transceiver circuit or a transceiver.
  • FIG. 4 is a schematic structural diagram of a network device according to an embodiment of the present disclosure, which may be a schematic structural diagram of a base station.
  • the base station can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiment.
  • the base station 20 includes one or more radio frequency units, such as a remote radio unit (RRU) 201 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 202.
  • RRU 201 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 2011 and a radio frequency unit 2012.
  • the RRU 201 part is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for transmitting DCI to a terminal device.
  • the BBU 202 part is mainly used for performing baseband processing, controlling a base station, and the like.
  • the RRU 201 and the BBU 202 may be physically disposed together or physically separated, that is, distributed base stations.
  • the BBU 202 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used to perform baseband processing functions such as channel coding, multiplexing, modulation, spread spectrum, and the like.
  • the BBU processing unit
  • the BBU can be used to control the base station to perform an operation procedure about the network device in the foregoing method embodiment.
  • the BBU 202 may be composed of one or more boards, and multiple boards may jointly support a single access standard radio access network (such as an LTE network), or may separately support different access modes of wireless. Access network (such as LTE network, 5G network or other network).
  • the BBU 202 also includes a memory 2021 and a processor 2022.
  • the memory 2021 is used to store necessary instructions and data.
  • the memory 2021 stores the correspondence relationship between the indication information and the combination information in the above embodiment and the like.
  • the processor 2022 is configured to control the base station to perform necessary actions, for example, to control the base station to perform an operation procedure about the network device in the foregoing method embodiment.
  • the memory 2021 and the processor 2022 can serve one or more boards. That is, the memory and processor can be individually set on each board. It is also possible that multiple boards share the same memory and processor. In addition, the necessary circuits can be set on each board.
  • FIG. 5 is a schematic structural diagram of a communication device 500.
  • the device 500 can be used to implement the method described in the foregoing method embodiments. For details, refer to the description in the foregoing method embodiments.
  • the communication device 500 can be a chip, a network device (such as a base station), a terminal device or other network device, and the like.
  • the communication device 500 includes one or more processors 501.
  • the processor 501 can be a general purpose processor or a dedicated processor or the like. For example, it can be a baseband processor, or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processor can be used to control communication devices (eg, base stations, terminals, or chips, etc.), execute software programs, and process data of the software programs.
  • the communication device may include a transceiver unit for implementing input (reception) and output (transmission) of signals.
  • the communication device can be a chip, and the transceiver unit can be an input and/or output circuit of the chip, or a communication interface.
  • the chip can be used for a terminal or base station or other network device.
  • the communication device may be a terminal or a base station or other network device
  • the transceiver unit may be a transceiver, a radio frequency chip, or the like.
  • the communication device 500 includes one or more of the processors 501, and the one or more processors 501 can implement the method of the network device or the terminal device in the embodiments shown in FIG. 2.
  • the communication device 500 includes means for generating downlink control information DCI, and means for transmitting DCI.
  • the function of generating the DCI and the function of transmitting the DCI may be implemented by one or more processors.
  • one or more processors can be generated
  • the DCI is transmitted through a transceiver, or an input/output circuit, or an interface of a chip.
  • DCI refer to the related description in the foregoing method embodiment.
  • the communication device 500 includes means for receiving downlink control information DCI and means for determining a feedback status of the uplink data based on the DCI.
  • the DCI and how to determine the receiving state of the uplink data are described in the related description in the foregoing method embodiments.
  • the DCI may be received, for example, by a transceiver, or an input/output circuit, or an interface of a chip, and the reception status of the uplink data is determined based on the DCI by one or more processors.
  • the processor 501 can implement other functions in addition to the methods of the embodiments shown in FIG. 2 .
  • the processor 501 may also include instructions 503 that may be executed on the processor such that the communication device 500 performs the methods described in the above method embodiments.
  • the communication device 500 can also include circuitry that can implement the functions of the foregoing method embodiments.
  • the communication device 500 can include one or more memories 502 having instructions 504 stored thereon that can be executed on the processor such that the communication device 500 executes The method described in the above method embodiments.
  • data may also be stored in the memory.
  • Instructions and/or data can also be stored in the optional processor.
  • the processor and the memory may be provided separately or integrated.
  • the communication device 500 may further include a transceiver unit 505 and an antenna 506.
  • the processor 501 may be referred to as a processing unit to control a communication device (terminal or base station).
  • the transceiver unit 505 can be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., for implementing the transceiver function of the communication device through the antenna 506.
  • the embodiment of the present application further provides a communication system including the foregoing network device and one or more terminal devices.
  • the processor may be a central processing unit (“CPU"), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration. Circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory can include read only memory and random access memory and provides instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the bus system may include a power bus, a control bus, and a status signal bus in addition to the data bus.
  • a power bus may include a power bus, a control bus, and a status signal bus in addition to the data bus.
  • the various buses are labeled as bus systems in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions (programs).
  • programs When the computer program instructions (programs) are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium eg, a solid state disk (SSD)

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé et un dispositif de transmission de données. Le procédé comprend les étapes suivantes : un dispositif de réseau reçoit des données de liaison montante transmises par un dispositif terminal ; et le dispositif de réseau transmet des premières informations de commande de liaison descendante au dispositif terminal, une valeur d'un premier bit des premières informations de commande de liaison descendante étant 1, le numéro du premier bit est supérieur ou égal à 1, et le premier bit est utilisé pour indiquer si les premières informations de commande de liaison descendante indiquent un accusé de réception positif ou un accusé de réception négatif aux données de liaison montante par le dispositif de réseau. Les modes de réalisation de la présente invention peuvent réduire le retard de la rétroaction pour des données de liaison montante.
PCT/CN2017/097272 2017-08-11 2017-08-11 Procédé et dispositif de transmission de données WO2019028916A1 (fr)

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