WO2018141229A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2018141229A1
WO2018141229A1 PCT/CN2018/074221 CN2018074221W WO2018141229A1 WO 2018141229 A1 WO2018141229 A1 WO 2018141229A1 CN 2018074221 W CN2018074221 W CN 2018074221W WO 2018141229 A1 WO2018141229 A1 WO 2018141229A1
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WIPO (PCT)
Prior art keywords
control information
field
data
information
time
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PCT/CN2018/074221
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English (en)
Chinese (zh)
Inventor
彭金磷
董朋朋
张鹏
杜白
Original Assignee
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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Priority claimed from CN201710184943.8A external-priority patent/CN108390741B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18747922.5A priority Critical patent/EP3567775A4/fr
Publication of WO2018141229A1 publication Critical patent/WO2018141229A1/fr
Priority to US16/530,611 priority patent/US20190356415A1/en

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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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a data transmission method and apparatus in a wireless communication system.
  • HARQ hybrid automatic repeat request
  • FEC forward error correction
  • ARQ automatic repeat request
  • the transmitting device needs to divide the TB into multiple A code block (CB) is encoded for each CB and then transmitted to the receiving device.
  • the receiving device decodes each received CB, and when there is a CB decoding error, sends a negative acknowledgement (NACK) to the transmitting device, requesting the transmitting device to retransmit the data of the TB.
  • NACK negative acknowledgement
  • the receiving device can improve the retransmission efficiency by indicating which CB decoding errors or CB group decoding errors of the transmitting device, so that the transmitting device only retransmits the CB group that decodes the error or the CB group that decodes the error.
  • a CB group here usually includes at least two CBs, but does not exclude a CB group that includes only one CB. For example, 7 CBs are divided into 4 CB groups, the first three CB groups contain two CBs, and the last CB group has only CB groups. A CB. How to design a low complexity data transmission method is a technical problem to be solved by the present application.
  • the present application provides a data transmission method that can be used to reduce the complexity of a receiving device.
  • the first aspect provides a data transmission method, including: when the first device performs the first transmission to the at least one transport block TB, the first device sends the first control information to the second device, where the first control The information includes a modulation and coding scheme (MCS) field, the MCS field including at least one of information of a modulation scheme used when transmitting the TB, and information of a transport block size TBS; when the first device When retransmitting the TB, the first device sends second control information to the second device, where the second control information includes a first field but does not include the MCS field, the first field Information including the relationship between the retransmitted data and the TB.
  • MCS modulation and coding scheme
  • the receiving device Since the receiving device does not know when the transmitting device will send data to itself, the receiving device needs to always detect the control information to determine whether data is sent to itself. There are many formats of control information, so the receiving device needs to blindly check various possible control information formats to determine whether there is any control information sent to them.
  • the format of the control information for retransmitting data reuses the format of the control information of the initial transmission data, thereby reducing the number of blind detections of the control information by the receiving device, thereby reducing the complexity of the receiving device.
  • the second control information is the same length as the first control information.
  • the length of the first field is the same as the length of the MCS field.
  • a starting position of the first field in the second control information is the same as a starting position of the MCS field in the first control information.
  • the first field completely reuses the MCS field, thereby making the control channel design simpler and reducing the complexity of the receiver of the receiving device.
  • the length of the second control information is smaller than the length of the first control information.
  • the first control information further includes a redundancy version RV field, where the RV field includes rate matching information when the TB is first sent, and the second control information is further A second field is included but the RV field is not included, the second field including information of a relationship between the retransmitted data and the TB.
  • the length of the second field is the same as the length of the RV field.
  • a starting position of the second field in the second control information is the same as a starting position of the RV field in the first control information.
  • the first field includes information about a modulation mode used when retransmitting the TB; or the second field includes a modulation used when retransmitting the TB Way of information.
  • the relationship between the retransmitted data and the TB includes: the retransmitted data is at least one coding block CB group in the TB, The CB group includes at least one CB; or the retransmitted data is data for first transmission of the Q first time-frequency resources in the TB on the P first time-frequency resources, where Q is less than or equal to P, P And Q is an integer greater than zero.
  • the first time-frequency resource includes at least one time domain symbol, or includes at least one mini-slot, or includes at least one time slot, where The mini-slot includes at least one time domain symbol, the time slot including at least two time domain symbols.
  • a data transmission method comprising: when a second device receives data of a first transmission from at least one transport block TB of a first device, the second device receives a first from the first device a control information, the first control information includes a modulation and coding scheme MCS field, the MCS field including at least one of information of a modulation scheme used when transmitting the TB, and information of a transport block size TBS;
  • the second device receives the retransmission data of the TB from the first device, the second device receives second control information from the first device, where the second control information includes the first field but does not include The MCS field, the first field includes information of a relationship between the retransmitted data and the TB.
  • the receiving device When receiving data, the receiving device usually needs to first detect the control information corresponding to the data transmission. Since the receiving device does not know when the transmitting device will send data to itself, the receiving device needs to always detect the control information to determine whether data is sent to itself. There are many formats of control information, so the receiving device needs to blindly check various possible control information formats to determine whether there is any control information sent to them.
  • the format of the control information for retransmitting data reuses the format of the control information of the initial transmission data, thereby reducing the number of blind detections of the control information by the receiving device, thereby reducing the complexity of the receiving device.
  • the second control information is the same length as the first control information.
  • the length of the first field is the same as the length of the MCS field.
  • a starting position of the first field in the second control information is the same as a starting position of the MCS field in the first control information.
  • the first field completely reuses the MCS field, thereby making the control channel design simpler and reducing the complexity of the receiver of the receiving device.
  • the length of the second control information is smaller than a length of the first control information.
  • the first control information further includes a redundancy version RV field, where the RV field includes rate matching information when the TB is first sent, and the second control information is further A second field is included but the RV field is not included, the second field including information of a relationship between the retransmitted data and the TB.
  • the length of the second field is the same as the length of the RV field.
  • a starting position of the second field in the second control information is the same as a starting position of the RV field in the first control information.
  • the first field includes information about a modulation mode used when retransmitting the TB; or the second field includes a modulation used when retransmitting the TB Way of information.
  • the relationship between the retransmitted data and the TB includes: the retransmitted data is at least one coding block CB group in the TB, The CB group includes at least one CB; or the retransmitted data is data for first transmission of the Q first time-frequency resources in the TB on the P first time-frequency resources, where Q is less than or equal to P, P And Q is an integer greater than zero.
  • the first time-frequency resource includes at least one time domain symbol, or includes at least one mini-slot, or includes at least one time slot, where The mini-slot includes at least one time domain symbol, the time slot including at least two time domain symbols.
  • a communication apparatus comprising a processing unit, a transmitting unit, to perform the method of the first aspect or any possible implementation of the first aspect.
  • a communication apparatus comprising a processor, a memory and a transceiver to perform the method of the first aspect or any possible implementation of the first aspect.
  • a communication apparatus comprising a processing unit, a transmitting unit, to perform the method in any of the possible implementations of the second aspect or the second aspect.
  • a communication apparatus comprising a processor, a memory and a transceiver to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • a computer readable storage medium is provided, the instructions being stored in the computer readable storage medium, when executed on a computer, causing the computer to perform the first aspect or any possible implementation of the first aspect The method in the way.
  • a computer readable storage medium is provided, the instructions being stored in the computer readable storage medium, when executed on a computer, causing the computer to perform any of the possible implementations of the second aspect or the second aspect The method in the way.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the second aspect or the second aspect.
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the present application is applied;
  • FIG. 2 is a schematic diagram of a data transmission method according to an embodiment of the present application.
  • FIG. 2A is a schematic structural diagram of first control information and second control information provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a time-frequency resource division manner according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another time-frequency resource division manner according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another data transmission method according to an embodiment of the present application.
  • FIG. 5A is another schematic structural diagram of first control information and second control information according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another data transmission method according to an embodiment of the present application.
  • FIG. 6A is another schematic structural diagram of first control information and second control information provided by an embodiment of the present application.
  • FIG. 6B is another schematic structural diagram of first control information and second control information provided by an embodiment of the present application.
  • 6C is another schematic structural diagram of first control information and second control information provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another data transmission method according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of another data transmission method according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of another data transmission method according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of another communication apparatus according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another communication apparatus according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of another communication apparatus according to an embodiment of the present application.
  • the transmitting device and the receiving device in the embodiments of the present application may be any one of the transmitting end device and the receiving end device that performs data transmission in a wireless manner.
  • the transmitting device and the receiving device may be any device with wireless transceiver function, including but not limited to: base station NodeB, evolved base station eNodeB, base station in the fifth generation (5G) wireless communication system, and future communication.
  • a base station or a network device in the system an access node in a WiFi system, a wireless relay node, a wireless backhaul node, and a user equipment (UE).
  • the UE may also be referred to as a terminal terminal, a mobile station (MS), a mobile terminal (MT), or the like.
  • the UE may communicate with one or more core networks via a radio access network (RAN), or may access the distributed network in an ad hoc or unlicensed manner, and the UE may also access the wireless network through other means.
  • RAN radio access network
  • the UE can also directly perform wireless communication with other UEs, which is not limited by the embodiment of the present application.
  • the transmitting device and the receiving device in the embodiments of the present application may be deployed on land, including indoors or outdoors, handheld or on-board; or may be deployed on the water; or may be deployed on aircraft, balloons, and satellites in the air.
  • the UE in the embodiment of the present application may be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal device.
  • wireless terminal in industrial control wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, transportation security Wireless terminal in safety), wireless terminal in smart city, wireless terminal in smart home, and the like.
  • the embodiment of the present application does not limit the application scenario.
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the present application is applied.
  • the communication system includes a core network device 110, a base station 120, a user equipment 130, and a user equipment 140 connected by a wireless connection or a wired connection or other manner.
  • the user equipment 130 and the user equipment 140 may be stationary or may be Mobile.
  • 1 is only a schematic diagram, and other communication devices and/or other terminal devices may also be included in the communication system, which are not shown in FIG.
  • the embodiments of the present application can be applied to downlink data transmission, and can also be applied to uplink data transmission, and can also be applied to device to device (D2D) data transmission.
  • D2D device to device
  • the transmitting device is a base station, and the corresponding receiving device is a UE.
  • the transmitting device is a UE, and the corresponding receiving device is a base station.
  • the transmitting device is a UE, and the corresponding receiving device is also a UE.
  • the embodiment of the present application does not limit this.
  • a transmitting device is also referred to as a first device
  • a receiving device is also referred to as a second device.
  • eMBB ultra reliable and low latency communications
  • URLLC ultra reliable and low latency communications
  • the preemption means that the sending device is configured to map the URLLC service data to the time-frequency resource that has been allocated to the eMBB service data, and the eMBB service data stops transmitting on the time-frequency resource of the URLLC service data, and the part is stopped.
  • the eMBB service data is also called punctured by the URLLC service data.
  • the transmitting device In order for the receiving device to correctly decode the eMBB service data, the transmitting device needs to retransmit the part of the eMBB service data that has been punched out. In order for the receiving device to know which part of the data is retransmitted by the transmitting device, the transmitting device needs to indicate the retransmitted data.
  • retransmit the eMBB service data affected by the puncturing there may be different retransmission modes, for example, retransmitting the data of the CB affected by the puncturing, or retransmitting the data of the CB group affected by the puncturing, or Pass the data on the time-frequency resources affected by the punch.
  • the above only retransmits data of a CB or CB group in a TB due to channel fading or interference, or only retransmits data of a part of the CB or CB group affected by the puncturing in a TB, or only retransmits the data.
  • the data on the time-frequency resource affected by the puncturing in the TB, or only the data on the time-frequency resource affected by the interference in the TB is referred to as a special retransmission in this application. It can be understood that for a special retransmission, data of decoding errors due to channel fading or interference and data of decoding errors due to puncturing can be simultaneously transmitted.
  • the data of all CBs in the TB is retransmitted by the same or different rate matching parameters. In this application, we refer to this retransmission as a normal retransmission.
  • special retransmission also includes supplemental transmission.
  • the so-called retransmission means that the transmitting device actively transmits the part of the data affected by the preemption of the time-frequency resource or the part of the data affected by the interference to the receiving device before receiving the NACK fed back by the receiving device.
  • the retransmission here can be based on scheduling, or it can be based on non-scheduled, that is, automatic retransmission.
  • the granularity of the affected data may be a granularity of CB, a granularity of the CB group, or a granularity of time domain symbols, mini-slots, time slots, and the like.
  • the redundancy version (RV) of the retransmission can be the same as or different from the initial transmission.
  • a special retransmission by a transmitting device for retransmission of a partial CB or CB group that causes a decoding error due to channel fading or interference may be referred to simply as partial retransmission.
  • the special retransmission may be performed on any time unit after the initial transmission, which is not limited by the embodiment of the present application.
  • the time unit here may be a transmission time interval (TTI), a time slot or a mini-slot.
  • TTI transmission time interval
  • the sending device may retransmit after receiving the ACK/NACK fed back by the receiving device, or may retransmit before receiving the ACK/NACK, and may retransmit immediately in the next time unit after the initial transmission, or may be retransmitted at the next time.
  • the next k time units are retransmitted, where k is an integer greater than zero. That is, assuming that the number of the time unit of the initial transmission is n, the number of the time unit of the retransmission is n+k, and n is an integer greater than or equal to zero.
  • One possible CB grouping method is to group according to the number order of CBs in TB, so that the number of CBs included in each group is approximately equal. For example, if a TB includes 12 CBs, assuming that the number of CB groups determined by some predefined rule is 4, the 12 CBs can be equally divided into 4 CB groups, among the 4 CB groups.
  • the numbers of CB are: ⁇ 1, 2, 3 ⁇ , ⁇ 4, 5, 6 ⁇ , ⁇ 7, 8, 9 ⁇ , ⁇ 10, 11, 12 ⁇ .
  • the numbers of the CBs in the 4 CB groups are: ⁇ 1, 2, 3 ⁇ , ⁇ 4, 5, 6 ⁇ , ⁇ 7, 8, 9, 10 ⁇ , ⁇ 11, 12,13,14 ⁇ or ⁇ 1,2,3,4 ⁇ , ⁇ 5,6,7,8 ⁇ , ⁇ 9,10,11 ⁇ , ⁇ 12,13,14 ⁇ .
  • Another possible CB grouping method is grouping according to whether it is affected by resource preemption or interfered with by interference. For example, CBs that are affected by resource preemption or interfered with by interference are divided into one or more groups, which are not preempted by resources and are not affected by interference. The CBs are divided into one or more groups.
  • an intuitive method is to add a type of control information for indicating which part of the data is retransmitted in the special retransmission.
  • the receiving device When receiving data, the receiving device usually needs to first detect the control information corresponding to the data transmission. Since the receiving device does not know when the transmitting device will send data to itself, the receiving device needs to always detect the control information to determine whether data is sent to itself. There are many formats of control information, so the receiving device needs to blindly check various possible control information formats to determine whether there is any control information sent to them. If a new control information format is added, the number of blind detections of the receiving device is increased, thereby increasing the complexity of the receiving device.
  • the present application provides a data transmission and transmission method, in which the format of the control information of the retransmission data used in the data transmission reuses the format of the control information of the initial transmission data, thereby reducing the number of blind detections of the control information by the receiving device, thereby Reduce the complexity of the receiving device.
  • FIG. 2 is a schematic diagram of a data transmission method provided by the present application.
  • the special retransmission is indicated by redefining the MCS field in the control information, and specifically indicating which part of the TB is retransmitted.
  • the first device when the first device performs the first transmission (also referred to as initial transmission) on the at least one TB, the first device sends the first control information to the second device, where the first control information includes an MCS field, where the MCS field At least one of information of a modulation scheme used when transmitting the TB and information of a transport block size (TBS) is included.
  • the first control information includes an MCS field, where the MCS field At least one of information of a modulation scheme used when transmitting the TB and information of a transport block size (TBS) is included.
  • TBS transport block size
  • the physical layer control information required for data transmission can be notified to the receiving device by using downlink control information (DCI).
  • DCI downlink control information
  • physical layer control information may be notified to the receiving device by uplink control information (UCI).
  • uplink control information For scheduling-based uplink data transmission, physical layer control information may also be sent by the receiving device to the transmitting device through the DCI.
  • the data sent by the first device at one time may include one TB or more than one TB, and may be based on available air interface resources, channel quality of a wireless channel between the first device and the second device, and a resource allocation policy. The factors are determined. For convenience of description, the following describes a TB as an example.
  • the first device when the first device retransmits the TB, the first device sends the second control information to the second device, where the second control information includes the first field but does not include the MCS field, where the first field includes Information about the relationship between the retransmitted data and the TB.
  • the length of the first field is the same as the length of the MCS field.
  • the starting position of the first field in the second control information is the same as the starting position of the MCS field in the first control information.
  • the length of the second control information may be the same as the length of the first control information, and the length of the second control information may also be less than or equal to the length of the first control information. It can be understood that when the length of the second control information is the same as the length of the first control information, the introduction of the second control information does not increase the number of blind detections of the control device by the receiving device, thereby effectively reducing the receiving of the receiving device. The complexity of the machine; when the length of the second control information is less than the length of the first control information, the overhead of the control channel can be reduced, and the data transmission efficiency is improved.
  • the first control information is the same length as the second control information, and the MCS field and the first field are the same in position and length. It can also be understood that the second control information is used to perform the MCS field in the first control information. Redefinition. Optionally, the first control information is the same as the other fields of the second control information.
  • the above method can be understood as the first field reusing the MCS field, by which the relationship between the retransmitted data and the TB is indicated.
  • the reuse method may also be understood as follows: when the first device performs the first transmission (also referred to as initial transmission) on at least one TB, the first device sends the first control information to the second device, where the first control information
  • the MCS field is included, where the MCS field includes at least one of information about a modulation mode used when the TB is sent and information of a TBS; when the first device retransmits the TB, the first device controls the second The information is sent to the second device, and the second control information includes an MCS field, wherein the MCS field in the second control information indicates a relationship between the retransmitted data and the TB.
  • the first field may further include information about a modulation mode used when retransmitting the TB.
  • the relationship between the retransmitted data and the TB includes: the retransmitted data is at least one coding block CB group in the TB, the CB group includes at least one CB; or Retransmitted data is at least one CB in the TB; or the retransmitted data is data on the first one time-frequency resource in the TB that is first transmitted on the P first time-frequency resources, where , Q is less than or equal to P, and P and Q are integers greater than zero.
  • the first time-frequency resource includes at least one time domain symbol, or includes at least one mini-slot, or includes at least one time slot, or includes at least one resource block (RB), where
  • the mini-slot includes at least one time domain symbol
  • the time slot includes at least two time domain symbols
  • the RB may be a physical RB or a virtual RB.
  • the RB is used to represent a time-frequency resource that is continuous in the time domain and in the frequency domain.
  • the minimum unit in the time domain is a time domain symbol, and the minimum unit in the frequency domain is a subcarrier.
  • the specific size of the RB can be related to a specific service and application. The scenario and the system are related.
  • the 12 frequency carriers in the frequency domain are corresponding to one RB in the time-domain continuous 7 symbols.
  • the specific size of the RB is not limited.
  • the time domain corresponding to the RB may range from 1 time domain symbol to 14 time domain symbols.
  • the relationship between the retransmitted data and the TB includes normal retransmission, partial retransmission in special retransmission, and retransmission in special retransmission.
  • the transmitting device may also be configured to send a preemption indication to the receiving device by sending the second control information to the receiving device.
  • the preemption indication may also be referred to as a puncturing indication, or may be understood as the sending device sending the pinging device to the receiving device.
  • Auxiliary receiving indication information For a more detailed description of the indication information for the auxiliary reception and the puncturing indication, refer to the seventh embodiment.
  • the retransmitted data is taken as an example of at least one CB group in the TB
  • the first field may be a number of a CB group in the TB, or may be used in the form of a bitmap. Indicates a partial CB group in the TB.
  • the first field may indicate a partial CB group in the TB by a number of 4 bits, and the bit sequence 0110 represents a CB group numbered 6; the first field may also pass a bitmap with a length of 4 bits.
  • the bit sequence 0110 represents the second and third CB groups in the TB.
  • the format and content required for physical layer control information in different scenarios may be different.
  • DCI in a long term evolution (LTE) system as an example, DCIs in formats 1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, etc. are defined for downlink data in different scenarios.
  • the MCS of various formats may include an MCS field including information of a modulation scheme used when transmitting the TB, or information including a modulation scheme used when transmitting the TB, and information of a transport block size TBS.
  • the length of the MCS field may be different for different formats of DCI.
  • the MCS field contains 5 bits
  • the MCS field contains 10 bits.
  • the two 5-bit MCS fields respectively correspond to the modulation coding scheme used by the two transport blocks.
  • Table 1 shows the relationship between a possible MCS field value and the modulation method and TBS.
  • the MCS field values from 0 to 28 can be used to indicate the modulation mode and TBS information, and the value 2 indicates that the modulation mode is quadrature phase shift keying (QPSK).
  • QPSK quadrature phase shift keying
  • a value of 4 indicates 16 quadrature amplitude modulation (QAM), and a value of 6 indicates 64QAM.
  • the TBS Since the retransmitted TBS is identical to the first transmitted TBS, the TBS may not be indicated by the MCS field during retransmission. Therefore, the MCS field can be used to indicate only the modulation mode, and the specific method of indicating the modulation mode is the same as that in the first transmission. It is also possible to indicate the modulation scheme with 2 bits, and the remaining 3 bits are used to indicate which part of the TB data is retransmitted. Specifically, the 3 bits may be used to indicate retransmission of the CB or CB group in the TB, and may also be used to indicate that the data on the time-frequency resource affected by the puncturing in the TB is retransmitted, and may also be used to indicate the weight.
  • the data on the time-frequency resources affected by the burst interference in the TB is transmitted.
  • the time-frequency resource here may be at least one mini-slot, or at least one slot is, or may be at least one RB, where the RB may be a physical RB or a virtual RB. It is also possible to indicate the modulation scheme with 1 bit, and the remaining 4 bits are used to indicate which part of the TB data is retransmitted.
  • a specific number of bits are needed to indicate the modulation mode, which is related to the type of modulation mode supported in the data transmission process, for example, if ⁇ /2 binary phase shift keying (BPSK) is to be supported, QPSK, 16QAM, 64QAM, and 256QAM require three bits to indicate the modulation scheme.
  • BPSK binary phase shift keying
  • the value of the MCS field is 29 to 31, which are used to indicate three modulation modes: QPSK, 16QAM, and 64QAM. Therefore, the new data indicator (NDI) in the DCI can be used to determine whether it is the first transmission or the retransmission, and then the most significant bit (MSB) of the MCS field is defined to be 1 to indicate the normal retransmission, and the MCS field is A MSB of 0 indicates a special retransmission.
  • NDI new data indicator
  • MSB most significant bit
  • the MCS field has 2 bits which can be used to indicate which part of the TB is retransmitted.
  • bit mapping may be used, and the 2 bits of the MCS field are used to indicate which CB of the 2 CBs to retransmit, and one CB or 2 CBs of 2 CBs are selected for performing.
  • binary 11 indicates that data in two CB or CB groups are retransmitted; binary 10 indicates that only data in the first CB or first CB group is retransmitted; binary 01 indicates that only the second CB or CB group is retransmitted.
  • Data in ; binary 00 means that data in two CB or CB groups are not retransmitted. It is also possible to indicate which CB or CB group data to retransmit according to the decimal values of the two bits, and only to retransmit the data in one CB or CB group at a time.
  • binary 00 represents retransmission of data in the first CB or CB group
  • binary 01 represents retransmission of data in the second CB or CB group
  • binary 10 represents retransmission of data in the third CB or CB group
  • Binary 11 represents the retransmission of data in the fourth CB or CB group.
  • the bit mapping may be used, and the 2 bits of the MCS field are used to indicate which of the 2 time-frequency resources in the retransmission data is selected.
  • the data in one of the two time-frequency resources or the data in the two time-frequency resources is retransmitted.
  • the data in the time-frequency resource can be retransmitted according to the decimal value of the two bits. Indicates to retransmit data in a time-frequency resource.
  • the above two different special retransmissions have similar indication methods, but the contents of the indications are different.
  • FIG. 3 is a schematic diagram of a time-frequency resource division manner provided by the present application.
  • one transmission is in one slot, one slot includes seven time domain symbols, and seven time domain symbols are divided into four first time-frequency resources, wherein the first three first time-frequency resources are included. Two time domain symbols are respectively occupied, and the last first time-frequency resource occupies one time domain symbol.
  • One of the first time-frequency resources in FIG. 3 can also be referred to as a mini-slot.
  • FIG. 4 is a manner of dividing another time-frequency resource provided by the present application. In order to support finer retransmission granularity, as shown in FIG. 4, seven time domain symbols in one slot are divided into eight first time-frequency resources.
  • FIG. 3 and FIG. 4 are only schematic diagrams of a division manner of time-frequency resources. The method for dividing time-frequency resources is not limited in this application.
  • the 5 bits in the MCS field can be used to indicate which part of the TB is retransmitted.
  • the MCS field After distinguishing the normal retransmission and the special retransmission by the MSB of the MCS field, for the special retransmission, the MCS field has 4 bits which can be used to indicate which part of the data of the TB is retransmitted. Specifically, how the 5 bits or 4 bits indicate the data retransmitted by the special retransmission can be directly obtained by referring to the above 2-bit and 3-bit indication manners, and details are not described herein.
  • the above describes the use of partial bits of the MCS field or the MCS field to indicate the relationship between the retransmitted data and the TB at the time of initial transmission.
  • the following is an example of indicating the relationship between the retransmitted data and the TB at the initial transmission by using the CBG index, and another implementation of indicating the relationship between the retransmitted data and the TB at the initial transmission by reusing the MCS field. example.
  • the CBG index indication example herein does not limit the method for indicating the relationship between the retransmitted data and the TB at the time of initial transmission.
  • Table 2 shows a method for defining the MCS field in which the modulation order is jointly encoded with the CBG index. That is, the MCS field includes information of the modulation order and information of the relationship between the retransmitted data and the TB at the time of initial transmission.
  • the 5-bit length MCS field has a total of 32 values, and the corresponding MCS index value is 0 to 31.
  • the CBG index in the table is a binary bit sequence. The corresponding bit is 0 to indicate that the corresponding CBG is not retransmitted, 1 is for retransmission of the corresponding CBG, and the bit sequence 0100 is for retransmitting the third CBG data. On the left is the most significant bit MSB, and the far right of the bit sequence is the least significant bit (LSB).
  • the MCS field may also include information of modulation order, TBS index information, and information about the relationship between the retransmitted data and the TB at the time of initial transmission, and may also be understood as The information of the modulation order, the TBS index information, and the information of the relationship between the retransmitted data and the TB at the time of initial transmission are jointly encoded.
  • a 6-bit MCS field can be defined, as shown in Table 3.
  • Table 3 is a method for defining a MCS field in which the modulation order, the TBS index, and the CBG index are jointly encoded.
  • the MCS index values 0 to 28 in Table 3 can be used to indicate the modulation order and TBS information at the time of initial transmission, and the MCS index values 29 to 61 can be used to indicate the modulation order and the CBG index.
  • the definitions of the modulation order, the TBS index, and the CBG index can be referred to the related descriptions in Tables 1 and 2 above, respectively.
  • a possible retransmission mode configuration is that the eMBB and the URLLC coexistence area are configured as special retransmissions, and for the non-eMBB and URLLC coexistence areas, the configuration is a normal retransmission.
  • the coexistence area here means that the eMBB and the URLLC service can be scheduled at the same time in the time-frequency resource area, and the URLLC service can perform resource preemption on the eMBB service.
  • the retransmission mode may be implicitly indicated by the size of the TBS.
  • the implicit indication is a special retransmission. Among them, one possible value of the threshold here is 4.
  • the MCS field in the above embodiment is described by taking the example of 5 bits.
  • the length of the MCS field may be different for different systems or different scenarios of the same system, which is not limited in this application.
  • FIG. 5 is a schematic diagram of another data transmission method provided by the present application.
  • a special retransmission is indicated by redefining a redundancy version (RV) field in the control information, and specifically indicating which part of the TB is retransmitted.
  • RV redundancy version
  • the first device When the first device performs the first transmission to the at least one TB, the first device sends the first control information to the second device, where the first control information includes an RV field, where the RV field includes when the TB is sent for the first time. Rate matching information.
  • the first device When the first device retransmits the TB, the first device sends the second control information to the second device, where the second control information includes the second field but does not include the foregoing RV field, where the second field includes Information about the relationship between the retransmitted data and the TB.
  • the length of the second field is the same as the length of the RV field.
  • the starting position of the second field in the second control information is the same as the starting position of the RV field in the first control information.
  • the length of the second control information may be the same as the length of the first control information. Since the second control information is the same length as the first control information, the introduction of the second control information does not increase the number of blind detections of the control device by the receiving device, so that the complexity of the receiving device can be effectively reduced.
  • the first control information is the same length as the second control information, and the RV field and the start position and length of the second field are the same, and can also be understood as the second control information and the RV in the first control information.
  • the field has been redefined.
  • the first control information is the same as the other fields of the second control information.
  • the length of the RV field may be 2 bits or 4 bits, and may be other values, depending on the number of supported RV versions, which is not limited in this application.
  • the MSB of the RV field cannot be used to indicate whether it is a normal retransmission or a special retransmission.
  • FIG. 6 is a schematic diagram of another data transmission method provided by the present application.
  • the special retransmission is indicated by redefining the HARQ process number field in the control information, and specifically indicating which part of the TB is retransmitted.
  • the first device when the first device performs the first transmission to the at least one TB, the first device sends the first control information to the second device, where the first control information includes a HARQ process number field, where the HARQ process number field includes the first sending HARQ process number information used in the TB.
  • the first device when the first device retransmits the TB, the first device sends the second control information to the second device, where the second control information includes the third field but does not include the foregoing HARQ process number field, where the third device
  • the field includes information on the relationship between the retransmitted data and the TB.
  • the length of the third field is the same as the length of the HARQ process number field.
  • the starting position of the third field in the second control information is the same as the starting position of the HARQ process number field in the first control information.
  • the length of the second control information may be the same as the length of the first control information. Since the second control information is the same length as the first control information, the introduction of the second control information does not increase the number of blind detections of the control device by the receiving device, so that the complexity of the receiving device can be effectively reduced.
  • the first control information and the second control information have the same length, and the HARQ process number field and the third field have the same position and length, which can also be understood as the second control information and the HARQ in the first control information.
  • the process number field has been redefined.
  • the first control information is the same as the other fields of the second control information.
  • the length of the HARQ process ID field may be 3 bits or 4 bits, and may be other values, depending on the number of supported HARQ processes, which is not limited in this application.
  • the redefinition of the HARQ process number field refer to the redefinition mode of the MCS field in the first embodiment, and no further details are provided herein. The only difference is that the MSB of the HARQ process number field cannot be used to indicate whether it is a normal retransmission or a special retransmission.
  • the embodiment of the present application may also combine the foregoing Embodiment 1 to Embodiment 3.
  • the MCS field and the RV field in the control information may be redefined as the fourth field; in the case of (2), the MCS field and the HARQ process number field may be redefined.
  • Four fields; in the case of (3), the HARQ process number field and the RV field may be redefined as the fourth field; in the case of (4), the MCS field, the RV field, and the HARQ process number in the control information may also be redefined.
  • the field is the fourth field.
  • the fourth field in the figure is used to indicate which part of the TB data is retransmitted.
  • the fourth field is composed of two parts, P1 and P2, and the order of the fourth field of P1 and P2 is not in the present application.
  • P1 can be in front or P2 can be in front.
  • the fourth field is composed of three parts: P1, P2, and P3.
  • the order in which the P1, P2, and P3 form the fourth field is not limited in the present application.
  • the modulation and coding scheme field is adjacent to the HARQ process number, and a new data indication field is interposed between the HARQ process number field and the redundancy version field, but FIG. 6B only shows each field in the first control information. An indication of the relative position. Each field in the first control information may also have other arrangements. As shown in FIG. 6C, the order of each field is a modulation coding scheme, a HARQ process number, a new data indication, and a redundancy version. It can be understood that the first control information includes the above various fields, and the first control information may further include other fields not illustrated in the figure.
  • the fourth field indicates how the data of the TB is retransmitted.
  • FIG. 7 is a schematic diagram of another data transmission method provided by the present application.
  • the time-frequency resource used by the retransmission implicitly indicates which part of the TB is retransmitted.
  • the first device when the first device performs the first transmission to the at least one TB, the first device sends the TB to the second device on the second time-frequency resource, where the second time-frequency resource includes at least two thirds.
  • the time-frequency resource, the third time-frequency resource includes at least one time domain symbol, or includes at least one mini-slot, or includes at least one time slot, or includes at least one RB.
  • the second time-frequency resource includes P third time-frequency resources, and P is an integer greater than 2.
  • the first device when the first device retransmits the TB, the first device sends the partial data of the TB to the second device on a third time-frequency resource of the second time-frequency resource, where the third time
  • the location or index value of the frequency resource implicitly indicates which part of the TB the data is retransmitted.
  • the resource indications of the second time-frequency resource and the third time-frequency resource may be indicated in the resource block assignment (RA) field, or may be indicated in other fields, which is not limited in this application.
  • RA resource block assignment
  • This embodiment is further described by taking the third time-frequency resource including at least one RB as an example.
  • the first transmission of the TB uses 16 RBs, and the indexes are ⁇ x1, x2, ..., x16 ⁇ from large to small, and the 16 RBs constitute the second time-frequency resource.
  • the retransmitted RB index only includes the index in S1, it represents the data on the first CB or the first CB group or the first third time-frequency resource that is retransmitted; if the allocated RB is retransmitted
  • the index only contains the indexes in S2 and S4, which means that the second and fourth CBs, or the second and fourth CB groups, or the second and fourth third time-frequency resources are retransmitted. The data on it.
  • the first transmission of the TB uses 16 RBs, and the indexes are ⁇ x1, x2, ..., x16 ⁇ from large to small, and the 16 RBs constitute the second time-frequency resource.
  • the retransmitted RB index only includes the index in S1, it represents the data on the first CB or the first CB group or the first third time-frequency resource that is retransmitted; if the allocated RB is retransmitted
  • the index only contains the indexes in S2 and S4, which means that the second and fourth CBs, or the second and fourth CB groups, or the second and fourth third time-frequency resources are retransmitted. The data on it.
  • the RB index number may be used to modulo the CB number of the first transmission, which is used to indicate which CB data is currently retransmitted; or the RB index number may be used to modulate the number of CB groups in the first transmission.
  • the operation is used to indicate the data on the CB group that is currently retransmitted.
  • the RB index number may also be used to perform the modulo operation on the number of time-frequency resources in the first transmission, which is used to indicate which time-frequency resource is currently retransmitted. The data.
  • the RB index number may be the smallest RB index number of the time-frequency resources used for retransmission, or may be the largest or smallest RB index number of the time-frequency resources used for retransmission, or may be used during retransmission. All index numbers in the time-frequency resource satisfy one of the above conditions. For example, suppose that the first transmission of the TB includes four CB groups. If the first CB group needs to be retransmitted, the minimum value of the RB index number in the time-frequency resource allocated for retransmission can satisfy 4*x+1, where x If it is necessary to retransmit the third CB group, the minimum value of the RB index number in the retransmitted time-frequency resource satisfies 4*x+3.
  • the third time-frequency resource may be in a time domain symbol granularity, including at least one time domain symbol; or may be in a mini-slot granularity, including at least one mini-slot; or may be in a time slot granularity, including at least one time slot; Alternatively, other time domain units may be used as the granularity, which is not limited in this application.
  • the first transmission of the TB uses a time-frequency resource of one slot
  • the time slot includes multiple mini-slots
  • a re-transmitted time-frequency resource of a mini-slot can be used in the time slot through the mini-slot.
  • the number in the number indicates which part of the TB is currently being retransmitted.
  • the first transmission of the TB uses the time slot aggregation transmission of multiple time slots, and the time-frequency resource of a certain time slot or a certain time slot is used in the retransmission, and the time slot used in the retransmission can be used.
  • the number in the slot aggregation is used to indicate which part of the TB is currently being retransmitted.
  • time slots are used as one scheduling period, and four time slots are allocated time-frequency resources for the first transmission of data, wherein the data transmitted for the first time is divided into four CB groups. If the first CB group needs to be retransmitted, only the first time slot of 4 time slots needs to be allocated during retransmission; if the third CB group needs to be retransmitted, only 4 time slots need to be allocated for retransmission. The third time slot. For another example, one time slot is used as a scheduling period, and time-frequency resources of one time slot are allocated for the first transmission of data, wherein the first transmitted data is divided into four CB groups, and one time slot includes four mini- Slot.
  • the retransmission only needs to allocate the first mini-slot in the slot; if the third CB group needs to be retransmitted, the retransmission only needs to allocate the third slot in the slot.
  • Mini-slot More generally, for the retransmission of data on the time-frequency resource affected by the puncturing of the URLLC service data, retransmitting the allocated time-frequency resource and the location of the time-frequency resource affected by the puncturing of the URLLC service data the same. For example, in the first transmission of the TB, the data on the time-frequency resource of the upper half of the second mini-slot is destroyed, and the retransmission also allocates the bandwidth of the upper half of the second mini-slot in the slot.
  • the third time-frequency resource herein may also be the first time-frequency resource in FIG. 3 or FIG. 4, and the corresponding second time-frequency resource is the time-frequency resource of one time slot in FIG. 3 and FIG. .
  • Embodiments 1 to 5 in order to distinguish whether it is a normal retransmission or a special retransmission, a certain bit in the existing field in the control information may be used to indicate, as indicated by the MSB or LSB of the MCS field, as shown in Embodiment 1. There are also several possible ways to do this.
  • a possible method is to indicate whether a special retransmission is supported by the high layer signaling.
  • the physical layer control information used in the special retransmission may be indicated as one of the foregoing Embodiments 1 to 5, for example,
  • the scheme of reusing the MCS field in the first embodiment also adopts the scheme of reusing the MCS field and the RV field in the fourth embodiment.
  • the above high layer signaling may be radio resource control (RRC) layer signaling or medium access control (MAC) layer signaling.
  • a possible method is to add a field in the control information of the physical layer to indicate whether the retransmission corresponding to the control information is a normal retransmission or a special retransmission or to indicate whether a field such as MCS exists or is used to indicate whether Parse fields such as MCS according to reuse.
  • the field may further indicate whether the special retransmission is to retransmit the data on the CB of the decoding error or the data on the CB group of the decoding error, or to retransmit the data on the time-frequency resource affected by the puncturing.
  • the physical layer control information herein may be DCI or UCI.
  • the new field may be one bit, and is used to indicate whether all retransmission data corresponding to the control information is a normal retransmission or a special retransmission.
  • the new field may also be two bits, and is used to indicate whether all retransmission data corresponding to the control information is normal retransmission or retransmission part of CB or part of CB group data, or time-frequency resource affected by retransmission puncturing.
  • the new field may also be multiple bits, and each bit or every two bits is used to indicate whether the data corresponding to one CB or one CB group or one time-frequency resource is a normal retransmission or a special retransmission. This field may also further indicate whether the retransmission is a supplement in a special retransmission.
  • One possible approach is to distinguish between different retransmission types by different control information formats. For example, for normal retransmission, format one is used; for special retransmission, format two is used.
  • the receiving device blindly detects the format of the control information, that is, it can know which retransmission mode is currently used.
  • Sequence 1 and Sequence 2 may be a radio network temporary identifier (RNTI).
  • the retransmission type can be differentiated according to the time-frequency resource where the control information is located.
  • the time-frequency resource where the control information is located is RB set 1 or sub-band 1, it is a normal retransmission, otherwise, it is a special retransmission; or, when controlling If the time-frequency resource where the information is located is RB set 2 or sub-band 2, it is a special retransmission. Otherwise, it is a normal retransmission.
  • the retransmission type may also be distinguished according to the search space in which the control information is located.
  • control information When the control information is in the UE-specific search space, it is a normal retransmission, otherwise, it is a special retransmission; or, when the control information is in the public search space, Special retransmission, otherwise, it is ordinary retransmission; or, when the control information is in the UE-specific search space, it is a special retransmission; otherwise, it is an ordinary retransmission.
  • One possible approach is to implicitly indicate the type of retransmission by retransmission opportunity. For example, before the receiving device feeds back the ACK/NACK, the receiving device performs blind detection on the control information by using the special retransmission control information format, and parses the control information according to the special retransmission control information format; after the receiving device feeds back ACK/NACK The receiving device performs blind detection on the control information by using a normal retransmission control information format, and parses the control information according to the normal retransmission control information format.
  • One possible approach is to distinguish the type of retransmission by a combination of multiple fields. For example, if the NDI indicates a new transmission and the RV is a value other than 0, it is parsed according to the control information format of the special retransmission.
  • One possible method is a combination of the above two or more methods. For example, before the receiving device feeds back the ACK/NACK, the receiving device performs blind detection and parsing of the control information by using a special retransmission control information format; after the receiving device feeds back the ACK/NACK, if the NDI indicates a new transmission, and the RV is non-zero One value is used to parse the control information according to the special retransmission control information format, otherwise the receiving device parses the control information according to the normal retransmission control information format.
  • the following describes the process of ordinary retransmission and special retransmission by transmitting a TB containing four CB groups as an example. Assuming that the time-frequency resources of the third CB group in the first four CB groups are preempted, the retransmission type is set to a special retransmission and the third CB group is retransmitted. After receiving the retransmission control information, the receiving device clears the buffer data of the third CB group that was originally transmitted, does not participate in the HARQ merging of the retransmitted data, and puts the retransmitted received data into the third CB. The group's cache is decoded.
  • the retransmission type in the control information of the retransmitted data is set to normal retransmission and retransmitted to the third. CB group.
  • the receiving device After receiving the retransmission control information, the receiving device performs HARQ combining with the data of the third CB group that is retransmitted and the data of the third CB group that is initially transmitted, and then performs decoding.
  • the control information of the special retransmission in the foregoing Embodiments 1 to 6 it is required to indicate which part of the data is specifically retransmitted, and another possible implementation method is to determine which part of the data is retransmitted in combination with other indications.
  • the URLLC service data preempts the time-frequency resource of the eMBB service data
  • the sending device may instruct the receiving device which portion of the eMBB service data is punctured and destroyed.
  • the transmitting device retransmits, it can only retransmit the data on the time-frequency resources affected by the punched holes.
  • the retransmission is a special retransmission.
  • the retransmission type indication may be added only to indicate that the retransmission is a special retransmission, and other fields may be consistent with the ordinary retransmission;
  • control information for the special retransmission may only indicate which part of the data is retransmitted, and the receiving device may know that the special retransmission is performed according to the process number, so there is no need to indicate the retransmission type;
  • the receiving device can know that the transmission is a special retransmission according to the process number, according to the punching indication that has been received before. You can know which part of the data is retransmitted.
  • the retransmission type indication can be referred to Embodiment 6.
  • the puncturing indication may be indicated on the punctured symbol or mini-slot, or may be indicated on the last symbol or mini-slot of the current eMBB service data transmission, for example, assuming that the current eMBB service data transmission occupies one time slot, It can then be indicated on the last symbol of the time slot. This application does not limit the manner of punching instructions.
  • the puncturing indication here is also referred to as the indication information of the auxiliary reception sent by the transmitting device to the receiving device.
  • the sending device may send the indication information of the auxiliary reception to the receiving device, where the indication information of the auxiliary reception is used to notify the receiving device of the area affected by the preemption or interference.
  • the receiving device may discard the data corresponding to the affected area, and the data of the area does not participate in decoding and HARQ combining, thereby improving the decoding success rate and improving the data transmission efficiency.
  • the sending device can retransmit only the data of the affected area in combination with the indication information of the auxiliary receiving.
  • the puncturing indication and the auxiliary receiving indication information have the same meaning, and the two can be replaced with each other.
  • the receiving device may determine the current retransmission data according to the following method in combination with the content of the indication information that is assisted to receive:
  • the retransmitted data is the specific CB or the CB group containing these specific CBs.
  • the indication information of the auxiliary reception may indicate a specific CB by indicating the number of the CB or the bitmap of the CB.
  • the retransmitted data is these specific CB groups.
  • the indication information of the auxiliary reception may indicate a specific CB group by indicating the number of the CB group or the bitmap of the CB group.
  • the range of data for retransmission in the special retransmission in the foregoing Embodiments 1 to 7 is limited by the number of bits used for the indication in the control information. For example, when the MCS field is multiplexed in Embodiment 1, if the modulation mode is variable, Then only 2 bits can be used to indicate the range of data to be retransmitted. In order to expand the indication range, new fields may be introduced in the control information or the number of bits added in the reused fields to support a larger indication range. For example, 6 bits can support retransmission indications of 6 CB groups at the same time.
  • the above embodiments 1 to 8 mainly describe method embodiments from the perspective of a transmitting device. It can be understood that the method can also be applied to a receiving device. Referring to the method of the sending device, correspondingly, the receiving device receives the related information, and then processes according to the method corresponding to the sending device, and details are not described herein.
  • the various embodiments above are primarily described in terms of how to design a retransmission indication.
  • the following takes the data of the CB group affected by the puncturing as an example, and describes the data transmission process from the perspective of the processing process of the transmitting device and the receiving device.
  • one TB is composed of four CB groups, and the data of the third CB group is decoded due to the preemption of part of the time-frequency resources by the URLLC service data, and the decoding error of the first CB group due to channel fading .
  • feedback 1 represents NACK and feedback 0 represents ACK.
  • the NDI in the control information is 0 for initial transmission, NDI for 1 for retransmission, or NDI for no retransmission for retransmission, and NDI for reversal for new transmission, where flipping means that NDI changes from 0 to 1 or from 1 to 0.
  • An NDI can be set up for all CB groups together; an NDI can also be set for each CB group, and each CB group can independently indicate new transmission or retransmission.
  • the NDI field may be used to indicate that the data on the currently transmitted CB or CBG or time-frequency resource is a new transmission, a normal retransmission, or a special retransmission.
  • the NDI may further indicate whether the current special retransmission is partially retransmitted or retransmitted.
  • the NDI name here is only a schematic, and the name of the NDI is not limited in this application. These assumptions are only for convenience of explanation, and can be appropriately adjusted in actual application.
  • the multi-bit feedback described below refers to the introduction of the receiving device in order to indicate to the transmitting device which part of the currently transmitted data is decoded incorrectly.
  • the receiving device can feed back a 4-bit ACK to the transmitting device.
  • NACK information such as 1010. It can be understood that multi-bit feedback only feeds back multiple bits if needed. If one TB only includes one CB group, then only one bit can be fed back at this time, and the determination of the number of feedback bits can be determined by various methods. The method of determining the number of feedback bits is not limited.
  • the position of the indication information for sending the auxiliary reception is not limited, for example, it may be carried in the tail of the current time unit, or may be carried in the DCI of the next time unit, or may be in the time unit of the process retransmission or special retransmission. Carry in the DCI.
  • the transmitting device may send the indication information of the auxiliary reception before receiving the ACK/NACK, or may send the indication information of the auxiliary reception after receiving the ACK/NACK.
  • Option 1 Multi-bit feedback combined with retransmission indication.
  • the receiving device feeds back the binary sequence 1010 according to the decoding result, and represents the decoding errors of the first and third CB groups.
  • the sending device may send the control information by using the special retransmission indication method according to the foregoing first embodiment to the eighth embodiment, or may be used to indicate the retransmission of the first and the first, not limited to the embodiment in the application. 3 CB groups.
  • the receiving device After receiving the retransmission control information and data, the receiving device performs data processing, for example: (1) Optionally, the NDI indicates that both the first CB group and the third CB group are retransmitted, and the previously transmitted data is Perform HARQ merging; (2) or optionally, NDI indicates that both the first CB group and the third CB group are new transmissions, and the corresponding data may be the data of the first CB group and the third CB group. Alternatively, the data corresponding to the location of the preempted resource in the third CB group is transmitted, and the corresponding data in the previous cache is erased, and the received data is updated to the corresponding cached data.
  • the third bit in the four-bit NDI field indicates that the third CB group is a new transmission, and the other CB groups are not retransmitted.
  • the corresponding third CB group data may be The data of the complete third CB group may also be the data corresponding to the location of the preempted resource in the third CB group, and optionally the first bit in the NDI field indicates that the first CB group is retransmitted. .
  • the receiving end After receiving the retransmission control information and data, the receiving end performs data processing, for example, performing HARQ merging of the first CB group's initial transmission data and the retransmission data, and erasing the corresponding data in the buffer before the third CB group. And update the data of the newly received third CB group to the corresponding buffer, and then perform decoding and feedback decoding results.
  • Option 2 Auxiliary received indication information combined with multi-bit feedback and retransmission indication.
  • the sending device may send the auxiliary receiving indication information, for example, 1 bit, indicating whether the data transmission is preempted in the current data transmission.
  • the receiving device determines the number of bits to be fed back according to whether the auxiliary receiving indication information is received.
  • the number of feedback bits of the optional receiving device may be based on the indication information of the auxiliary receiving, that is, if the indication information of the auxiliary receiving is received, the multi-bit feedback, that is, Four bits 1010 are fed back (representing the 1st and 3rd CB group NACKs); otherwise, a 1-bit NACK is optionally fed back.
  • the number of feedback bits of the optional receiving device may also be based on the indication information of the auxiliary receiving, for example, multi-bit feedback may be performed according to a normal process.
  • the sending device may send the control information by using the retransmission indication method according to the foregoing first embodiment to the eighth embodiment, or may perform the retransmission of the first and third by using a manner not limited to the embodiment of the present application. CB group. After receiving the retransmitted control information and data, the receiving device performs data processing.
  • the optional NDI indicates that the first CB group and the third CB group are retransmitted, and then HARQ merges with the corresponding data previously transmitted; or
  • the optional NDI indicates that the first CB group and the third CB group are new transmissions, and the corresponding data that may be the first CB group and the third CB group may also be the first CB group.
  • the data and the data corresponding to the location of the preempted resource in the third CB group, the corresponding data in the previous buffer is erased, and the newly received data is updated to the data in the corresponding buffer, and then the decoding and feedback decoding results are performed.
  • Solution 3 The indication information of the auxiliary reception is combined with the multi-bit feedback and the retransmission indication.
  • the sending device may send the auxiliary receiving indication information, for example, 1 bit, indicating whether the data transmission is preempted in the current data transmission.
  • the receiving device determines the number of bits of feedback according to whether the indication information of the auxiliary reception is received.
  • the number of feedback bits of the optional receiving device may be based on the indication information of the auxiliary receiving, that is, if the indication information of the auxiliary receiving is received, the multi-bit feedback, that is, the feedback four bits 1010 (representing the first and third CB group NACK) Otherwise, a 1-bit NACK is optionally fed back.
  • the number of feedback bits of the optional receiving device may also be based on the indication information of the auxiliary receiving, for example, multi-bit feedback may be performed according to a normal process.
  • the sending device may send the control information by using the special retransmission indication method according to the foregoing first embodiment to the eighth embodiment, or may be used to indicate the retransmission of the first and the first, not limited to the embodiment in the application.
  • the corresponding third CB group data may be the complete third CB group data or the third CB.
  • the data corresponding to the location of the resource that is preempted in the group, and optionally the NDI is used to indicate that the first CB group is a retransmission.
  • the receiving end After receiving the retransmission control information and data, the receiving end performs data processing, for example, performing HARQ merging of the first CB group's initial transmission data and the retransmission data, and erasing the corresponding data in the buffer before the third CB group. And update the data of the newly received third CB group to the corresponding buffer, and then perform decoding and feedback decoding results.
  • some separate fields may be introduced for each CB group. For example, each CB group may have an independent RV field or the like.
  • Solution 4 The indication information of the auxiliary reception is combined with the multi-bit feedback and the retransmission indication.
  • the sending device may send the auxiliary receiving indication information, for example, 1 bit, indicating whether the data transmission is preempted in the current data transmission.
  • the receiving device determines the number of bits of feedback according to whether the indication information of the auxiliary reception is received.
  • the number of feedback bits of the optional receiving device may be based on the indication information of the auxiliary receiving, that is, if the indication information of the auxiliary receiving is received, the multi-bit feedback, that is, the feedback four bits 1010 (representing the first and third CB group NACK) Otherwise, a 1-bit NACK is optionally fed back.
  • the number of feedback bits of the optional receiving device may also be based on the indication information of the auxiliary receiving, for example, multi-bit feedback may be performed according to a normal process.
  • the sending device may send the control information by using the special retransmission indication method according to the foregoing Embodiments 1 to 8.
  • the third CB group may be retransmitted by using the method not limited to the present invention.
  • the NDI indicates that the third CB group is a new transmission, and the data of the corresponding third CB group may be the data of the complete third CB group or the location of the preempted resource in the third CB group. The data.
  • the receiving device After receiving the retransmission control information and data of the third CB group, the receiving device performs data processing, for example, erasing corresponding data in the buffer before the third CB group, and updating the data of the newly received third CB group. Go to the corresponding buffer, then decode and feed back the decoded result.
  • the third CB group After the third CB group is retransmitted, the first CB group is separately retransmitted, and the first CB group is optionally retransmitted by NDI, and the retransmission indication method is the same as the third CB group.
  • the receiving device After receiving the retransmission control information and data of the first CB group, the receiving device performs data processing, for example, HARQ combining with the data of the first CB group received before, and then decoding and feeding back the decoding result.
  • Option 5 1-bit feedback combined with a special retransmission indication. After receiving the TB data, if the receiving device has a CB decoding error, it will feed back a 1-bit NACK. The transmitting device determines the retransmitted data and control information according to the feedback result and whether the resource is preempted during the last transmission. After receiving the feedback, the sending device may send the control information by using the special retransmission indication method according to the foregoing Embodiments 1 to 8, indicating that the first and third CB groups are retransmitted, and indicating that the third CB group is due to Retransmissions that are affected by puncturing, the first CB group is retransmitted without being affected by puncturing.
  • the receiving end After receiving the retransmission control information and data, the receiving end performs data processing, for example, performing HARQ combining on the first CB group's initial transmission data and the retransmission data, and erasing the third CB group before being punched.
  • the data is buffered, and the decoding result is fed back according to the processing result.
  • some separate fields may be introduced for each CB group. For example, each CB group may have an independent RV field or the like.
  • Option 6 1-bit feedback combined with retransmission indication. After receiving the TB data, if the receiving device has a CB decoding error, it will feed back a 1-bit NACK. The transmitting device determines the retransmitted data and control information according to the feedback result and whether the resource is preempted during the last transmission. After receiving the feedback, the sending device may send the control information by using the special retransmission indication method according to the foregoing Embodiments 1 to 8. The method may also be used to limit the retransmission of the third CB group. And optionally using NDI to indicate that the third CB group is a new transmission, and the data of the corresponding third CB group may be the complete third CB group data or the third CB group may be preempted.
  • the data corresponding to the location of the resource After receiving the retransmission control information and data of the third CB group, the receiving device performs data processing, for example, erasing corresponding data in the buffer before the third CB group, and updating the data of the newly received third CB group. Go to the corresponding buffer, and then decode and feed back the decoded result.
  • the third CB group After the third CB group is retransmitted, the first CB group is separately retransmitted, and the first CB group is optionally retransmitted by NDI, and the retransmission indication method is the same as the third CB group.
  • the receiving device After receiving the retransmission control information and data of the first CB group, the receiving device performs data processing, for example, HARQ combining with the data of the first CB group received before, and then decoding and feeding back the decoding result.
  • Solution 7 The indication information of the auxiliary reception is combined with the 1-bit feedback and the retransmission indication.
  • the sending device may send the auxiliary receiving indication information, for example, N bits, and may indicate the number or bitmap of the preempted CB group, and may also indicate the location information of the preempted time-frequency resource.
  • the receiving device erases the previously buffered data affected by the puncturing according to the auxiliary received indication information, which may be before channel decoding and feedback, or after channel decoding and feedback. If the decoding fails, the receiving device feeds back a 1-bit NACK.
  • the control information may be sent by using the special retransmission indication method according to the foregoing first embodiment to the eighth embodiment, or may be re-transmitted to the third CB group by using the method not limited to the embodiment of the present application.
  • the third CB group is retransmitted by using the NDI, and the data of the corresponding third CB group may be the data of the complete third CB group or the preempted resource of the third CB group.
  • the location corresponds to the data.
  • the receiving device After receiving the retransmission control information and data of the third CB group, the receiving device performs data processing, for example, HARQ combining with the data of the third CB group received before, and then decoding and feeding back the decoding result.
  • the receiving device After receiving the retransmission control information and data of the first CB group, the receiving device performs data processing, for example, HARQ combining with the data of the first CB group received before, and then decoding and feeding back the decoding result.
  • data processing for example, HARQ combining with the data of the first CB group received before, and then decoding and feeding back the decoding result.
  • Scenario 8 The indication information of the auxiliary reception is combined with the multi-bit feedback and the retransmission indication.
  • the sending device may send the auxiliary receiving indication information, for example, N bits, and may indicate the number or bitmap of the preempted CB group, and may also indicate the location information of the preempted time-frequency resource.
  • the receiving device erases the previously buffered data affected by the puncturing according to the auxiliary received indication information, which may be before channel decoding and feedback, or after channel decoding and feedback.
  • the number of feedback bits of the optional receiving device may be based on the indication information of the auxiliary receiving, that is, if the indication information of the auxiliary receiving is received, the multi-bit feedback, that is, the feedback four bits 1010 (representing the first and third CB group NACK) Otherwise, a 1-bit NACK is optionally fed back.
  • the number of feedback bits of the optional receiving device may also be based on the indication information of the auxiliary receiving, for example, multi-bit feedback may be performed according to a normal process.
  • the control information may be sent by using the special retransmission indication method according to the foregoing first embodiment to the eighth embodiment.
  • the first CB group may be retransmitted by using the method not limited to the embodiment of the present application.
  • the third CB group and optionally using the NDI to indicate that the first CB group and the third CB group are retransmitted, in which case the data corresponding to the first CB group is retransmitted data, and the data of the third CB group is The data may be the data of the complete third CB group or the data corresponding to the location of the preempted resource in the third CB group.
  • the receiving device After receiving the retransmission control information and data of the first CB group and the third CB group, the receiving device performs data processing, for example, HARQ combining with the previously received data of the first CB group and the third CB group. Then, decoding is performed and the decoded result is fed back.
  • the process of retransmitting the data of the CB affected by the puncturing or retransmitting the data on the time-frequency resource affected by the puncturing may be directly obtained according to the processing of re-transmitting the data of the CB group affected by the puncturing, I will not repeat them here.
  • the data transmission method provided by the embodiment of the present application is introduced from the perspective of the interaction between the sending device, the receiving device, and the sending device and the receiving device.
  • various devices such as a transmitting device and a receiving device, etc., in order to implement the above functions, include hardware structures and/or software modules corresponding to the respective functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and method steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • FIG. 10 and FIG. 11 are schematic structural diagrams of two possible communication devices provided by an embodiment of the present application.
  • the communication device implements the functions of the transmitting device in the first to the ninth embodiments of the foregoing method, and thus can also achieve the beneficial effects of the foregoing method embodiments.
  • the communication device may be the UE 130 or the UE 140 or the base station 120 as shown in FIG. 1 , and may also be other transmitting side devices that perform wireless communication.
  • the communication device 1000 includes a processing unit 1010 and a transmitting unit 1020.
  • the processing unit 1010 is configured to generate first control information, where the first control information is control information that is sent to the second device when the communication device performs the first transmission of the at least one transport block TB, where the first control information includes a modulation coding scheme MCS field, the MCS field including at least one of information of a modulation scheme used when transmitting the TB and information of a transport block size TBS;
  • the sending unit 1020 is configured to send the first control information to the second device.
  • the processing unit 1010 is further configured to generate second control information, where the second control information is control information that is sent to the second device when the communication device retransmits the TB, the second control The information includes a first field, the first field includes information of a relationship between the retransmitted data and the TB, and the second control information does not include the MCS field;
  • the sending unit 1020 is further configured to send the second control information to the second device.
  • the length of the first field is the same as the length of the MCS field.
  • a starting position of the first field in the second control information is the same as a starting position of the MCS field in the first control information.
  • the communication device 1100 includes a processor 1110, a transceiver 1120, and a memory 1130, wherein the memory 1130 can be used to store code executed by the processor 1110.
  • the various components in the communication device 1100 communicate with one another via internal connection paths, such as control and/or data signals via a bus.
  • the processor 1110 is configured to generate first control information, where the first control information is control information that is sent to the second device when the communication device performs the first transmission to the at least one transport block TB, where the first control information includes a modulation coding scheme MCS field, the MCS field including at least one of information of a modulation scheme used when transmitting the TB and information of a transport block size TBS;
  • the transceiver 1120 is configured to send the first control information to the second device.
  • the processor 1110 is further configured to generate second control information, where the second control information is control information that is sent to the second device when the communication device retransmits the TB, the second control The information includes a first field, the first field includes information of a relationship between the retransmitted data and the TB, and the second control information does not include the MCS field;
  • the transceiver 1120 is further configured to send the second control information to the second device.
  • the length of the first field is the same as the length of the MCS field.
  • a starting position of the first field in the second control information is the same as a starting position of the MCS field in the first control information.
  • the communication device implements the functions of the receiving device in the first to ninth embodiments of the foregoing method, and thus can also achieve the beneficial effects of the foregoing method embodiments.
  • the communication device may be the UE 130 or the UE 140 or the base station 120 as shown in FIG. 1 , and may also be other receiving-side devices that perform wireless communication.
  • the communication device 1200 includes a receiving unit 1210 and a processing unit 1220.
  • the receiving unit 1210 is configured to receive first control information, where the first control information is control information from the first device when the communication device and the first device perform the first transmission to the at least one transport block TB.
  • the first control information includes a modulation and coding scheme MCS field, and the MCS field includes at least one of information of a modulation scheme used when transmitting the TB and information of a transport block size TBS;
  • the processing unit 1220 is configured to parse the first control information.
  • the receiving unit 1210 is further configured to receive second control information, where the second control information is a control from the first device when the communication device and the first device retransmit the TB Information, the second control information includes a first field, where the first field includes information of a relationship between the retransmitted data and the TB, and the second control information does not include the MCS field;
  • the processing unit 1220 is further configured to parse the second control information.
  • the length of the first field is the same as the length of the MCS field.
  • a starting position of the first field in the second control information is the same as a starting position of the MCS field in the first control information.
  • the communication device 1300 includes a processor 1320, a transceiver 1310, and a memory 1330, wherein the memory 1330 can be used to store code executed by the processor 1320.
  • the various components in the communication device 1300 communicate with one another via internal connection paths, such as by control and/or data signals over the bus.
  • the transceiver 1310 is configured to receive first control information, where the first control information is control information from the first device when the communication device and the first device perform the first transmission to the at least one transport block TB.
  • the first control information includes a modulation and coding scheme MCS field, and the MCS field includes at least one of information of a modulation scheme used when transmitting the TB and information of a transport block size TBS;
  • the processor 1320 is configured to parse the first control information.
  • the transceiver 1310 is further configured to receive second control information, where the second control information is a control from the first device when the communication device and the first device retransmit the TB Information, the second control information includes a first field, where the first field includes information of a relationship between the retransmitted data and the TB, and the second control information does not include the MCS field;
  • the processor 1320 is further configured to parse the second control information.
  • the length of the first field is the same as the length of the MCS field.
  • a starting position of the first field in the second control information is the same as a starting position of the MCS field in the first control information.
  • Figures 11 and 13 only show one design of the communication device.
  • the communication device can include any number of receivers and processors, and all communication devices that can implement embodiments of the present application are within the scope of the present application.
  • the device embodiment shown in FIG. 10 to FIG. 13 above is obtained by referring to the method embodiment in the first embodiment. It is to be understood that other device embodiments of the present application may be directly obtained by referring to other method embodiments of the present application, and are not described herein.
  • processors in the embodiment of the present application may be a central processing unit (CPU), and may be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof.
  • a general purpose processor can be a microprocessor or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by a processor executing software instructions.
  • the software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (Programmable ROM). , PROM), Erasable PROM (EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Register, Hard Disk, Mobile Hard Disk, CD-ROM, or well known in the art Any other form of storage medium.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a transmitting device or a receiving device. Of course, the processor and the storage medium can also exist as discrete components in the transmitting device or the receiving device.
  • the computer program product includes one or more computer instructions.
  • 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 or transmitted by a computer readable storage medium.
  • the computer instructions can be from a website site, computer, server or data center to another website site by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) Transfer from a computer, server, or data center.
  • 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 (such as a solid state disk (SSD)).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de transmission de données. Le procédé comprend les étapes suivantes : lorsqu'au moins un bloc de transmission (TB) est transmis pour la première fois, un premier dispositif transmet des premières informations de commande à un second dispositif, les premières informations de commande comprenant un schéma de modulation et de codage (MCS) ; lorsque le TB est retransmis, le premier dispositif transmet des secondes informations de commande au second dispositif, les secondes informations de commande comprenant un premier champ mais ne comprenant pas de champ MCS, et le premier champ comprenant des informations sur la relation entre les données retransmises et la TB. Selon la présente invention, le procédé de transmission de données réutilise le format des informations de commande pour la transmission initiale de données lors de la transmission des informations de commande pour la retransmission des données, réduisant ainsi le nombre de détections aveugles par rapport aux informations de commande pour un dispositif de réception, et réduisant la complexité du dispositif de réception.
PCT/CN2018/074221 2017-02-03 2018-01-26 Procédé et dispositif de transmission de données WO2018141229A1 (fr)

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US16/530,611 US20190356415A1 (en) 2017-02-03 2019-08-02 Data Transmission Method and Apparatus

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CN201710063731.4 2017-02-03
CN201710184943.8A CN108390741B (zh) 2017-02-03 2017-03-24 数据传输方法和设备
CN201710184943.8 2017-03-24

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CN113170353B (zh) * 2018-09-28 2023-07-25 株式会社Ntt都科摩 用户终端以及无线通信方法

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