WO2021258764A1 - Procédé d'envoi d'informations de commande, procédé d'envoi de livre de codes de rétroaction dynamique, station de base et terminal - Google Patents

Procédé d'envoi d'informations de commande, procédé d'envoi de livre de codes de rétroaction dynamique, station de base et terminal Download PDF

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Publication number
WO2021258764A1
WO2021258764A1 PCT/CN2021/078459 CN2021078459W WO2021258764A1 WO 2021258764 A1 WO2021258764 A1 WO 2021258764A1 CN 2021078459 W CN2021078459 W CN 2021078459W WO 2021258764 A1 WO2021258764 A1 WO 2021258764A1
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Prior art keywords
time unit
dai
target time
carrier
count value
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PCT/CN2021/078459
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English (en)
Chinese (zh)
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李军
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中兴通讯股份有限公司
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Publication of WO2021258764A1 publication Critical patent/WO2021258764A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • 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
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the embodiments of the present application relate to the field of wireless communication technologies, and in particular, to a method for sending control information, a method for sending a dynamic feedback codebook, a base station, and a terminal.
  • the downlink physical layer data is respectively carried by the physical downlink shared channel PDSCH (physical downlink shared channel).
  • PDSCH physical downlink shared channel
  • hybrid automatic repeat request HARQ hybrid automatic repeat request
  • the basic principle of HARQ is that the receiving end feeds back the decoding result of the data received from the sending end to the sending end.
  • the decoding result fed back when it is decoded correctly is an acknowledgement answer (acknowledgement, ACK), otherwise the decoded result fed back is a negative answer ( negative acknowledgement, NACK).
  • the sender can retransmit the transport block (TB).
  • CA carrier aggregation
  • the supporting UE can feed back the decoding results of multiple TBs transmitted by each cell to the cell in an uplink feedback information UCI (uplink control information) through the physical uplink control channel PUCCH (Physical Uplink Control Channel),
  • UCI uplink control information
  • PUCCH Physical Uplink Control Channel
  • the multiple TBs may be from different carriers under the aforementioned carrier aggregation.
  • the decoding result contained in the UCI is the HARQ dynamic feedback codebook, and the number of bits of the decoding result is the size of the HARQ dynamic feedback codebook, and which TB corresponds to each bit in the decoding result is the index/arrangement mode of the codebook.
  • the UE can determine the feedback information according to the number of carriers configured, for example, according to the counter downlink assignment index C-DAI (counter downlink assignment index) and the total number downlink assignment index T in the DCI.
  • C-DAI counter downlink assignment index
  • T-DAI total downlink assignment index
  • C-DAI is used to indicate the cumulative number of PDSCH received by the user. In the same time domain, it is arranged in the order of primary cell and then secondary cell.
  • T-DAI is used to indicate the total number of PDSCHs that the user receives from all serving cells. Domain, primary and secondary carriers must be calculated.
  • each cell sends DCI information to the UE through the PDCCH. Since the T-DAI and C-DAI in the DCI sent by the current cell to the UE can only be determined by knowing the PDSCH scheduling of other cells in the same time slot, each The cells need to know each other's status, so the real-time requirements of the system are high, the design complexity is high, and it is not easy to implement.
  • an embodiment of the present application provides a method for sending control information, applied to a base station, including: obtaining the number of cells participating in carrier aggregation; determining the current ranking information of the carrier cell among all carrier cells; determining the current time window Whether the time unit schedules the physical downlink shared channel PDSCH, the time unit scheduled for the PDSCH is the target time unit; according to the number of cells and the ranking information, the first count value corresponding to the target time unit is determined, and the The first count value corresponding to the target time unit is used as the counter-type downlink allocation index C-DAI value of the target time unit; according to the number of cells, the second count value corresponding to the target time unit is determined, and the target time unit is The second count value corresponding to the unit is used as the total downlink allocation index T-DAI value of the target time unit; the downlink control information DCI is generated according to the C-DAI value and the T-DAI value of the target time unit; and sent to the terminal device The DCI.
  • an embodiment of the present application provides a method for sending a dynamic feedback codebook, which is applied to a terminal device, and includes: acquiring DCI sent by multiple carrier cells, where the DCI is the carrier cell according to the first aspect of the embodiments of the present application
  • the control information is sent by the sending method, the DCI includes the C-DAI and T-DAI of the time unit in the current time window; the hybrid automatic repeat request is filled in according to the value of the C-DAI and T-DAI of the time unit HARQ dynamic feedback codebook; sending the HARQ dynamic feedback codebook to the carrier cell.
  • an embodiment of the present application provides an automatic retransmission method, applied to a base station, and includes: receiving a HARQ dynamic feedback codebook from a terminal device, the HARQ dynamic feedback codebook is the terminal device according to the embodiment of the application
  • the dynamic feedback codebook transmission method described in the second aspect is used, the HARQ dynamic feedback codebook includes feedback information of at least one transport block; according to the HARQ dynamic feedback codebook, the HARQID corresponding to the transport block is confirmed and determined A target transmission block, where the target transmission block is the valid transmission block corresponding to the HARQID; and the target transmission block is retransmitted according to the feedback information.
  • an embodiment of the present application provides a base station, including: a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program as described in the present invention.
  • the control information sending method described in the first aspect of the application embodiment or the automatic retransmission method described in the third aspect of the embodiment of the present application is implemented.
  • an embodiment of the present application provides a mobile terminal, including: a memory, a processor, and a computer program stored on the memory and running on the processor, wherein the processor executes the computer program as follows: The dynamic feedback codebook sending method described in the second aspect of the embodiments of the present application.
  • an embodiment of the present application provides a computer-readable storage medium that stores computer-executable instructions, where the computer-executable instructions are used to execute the control information sending method described in the first aspect of the embodiments of the present application , Or execute the dynamic feedback codebook sending method as described in the second aspect of the embodiments of the present application, or execute the automatic retransmission method as described in the third aspect of the present application.
  • FIG. 1 is a schematic structural diagram of a system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a time unit arrangement provided by an embodiment of the present application.
  • Fig. 3 is a flowchart of a method for sending information provided by an embodiment of the present application
  • FIG. 4 is a diagram showing the relationship between the time window and the time unit sent by the main carrier cc1 to the terminal device DCI;
  • FIG. 5 is a specific method flowchart of an embodiment of step 340 in FIG. 3;
  • FIG. 6 is a specific method flowchart of an embodiment of step 350 in FIG. 3;
  • FIG. 7 is a schematic diagram of a time unit arrangement provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a time unit arrangement provided by an embodiment of the present application.
  • FIG. 9 is a method for sending a dynamic feedback codebook provided by an embodiment of the present application.
  • FIG. 10 is an automatic retransmission method provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a time unit arrangement provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a time unit arrangement provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a time unit arrangement provided by an embodiment of the present application.
  • FIG. 14 is a system architecture diagram of a base station provided by an embodiment of the present application.
  • FIG. 15 is a system architecture diagram of a mobile terminal provided by an embodiment of the present application.
  • a schematic diagram of a possible network architecture applicable to this application includes at least one terminal equipment (UE) 10, which communicates with a base station (eNB) 20 through a wireless interface.
  • UE terminal equipment
  • eNB base station
  • a terminal device 10 and a base station 20 are provided.
  • carrier aggregation CA Carrier Aggregation
  • two or more cells of the base station can provide downlink data services for a single user.
  • each cell performs data scheduling separately through physical downlink control channels.
  • PDCCH Physical Downlink Control Channel
  • DCI Downlink Control Information
  • DATA data information
  • the cell that participates in carrier aggregation is called a carrier cell.
  • the downlink physical layer data is respectively carried by the physical downlink shared channel PDSCH (physical downlink shared channel).
  • hybrid automatic repeat request HARQ hybrid automatic repeat request
  • the basic principle of HARQ is that the receiving end feeds back the decoding result of the data received from the sending end to the sending end.
  • the decoding result fed back when it is decoded correctly is an acknowledgement answer (acknowledgement, ACK), otherwise the decoded result fed back is a negative answer (negative acknowledgement, NACK).
  • ACK acknowledgement answer
  • NACK negative acknowledgement
  • the current LTE system is divided into two transmission modes, frequency division duplexing (FDD) and time division duplexing (TDD).
  • FDD frequency division duplexing
  • TDD time division duplexing
  • the method for FDD to determine the feedback information is: in the time unit (the time unit in LTE is a subframe) n, the base station sends downlink data to the terminal device, and the terminal device feeds back the feedback information whether it is received correctly in the time unit n+4. If the data has only 1 transport block (TB), then feedback 1bit of feedback information; if there are 2 TB blocks (2 codewords) under multiple-input multiple-output (MIMO), then feedback 2bit feedback information.
  • TB transport block
  • MIMO multiple-input multiple-output
  • the way for TDD to determine the feedback information can be: the terminal device detects the downlink data transmission on the downlink time unit nk, the terminal device will send the feedback information in the uplink time unit n, where k ⁇ K (that is, 1 uplink time unit needs more feedback Whether the data on the downlink time unit is received correctly because the number of uplink time units is small).
  • each uplink time unit needs to feed back the feedback information transmitted by one or more downlink time units.
  • the feedback downlink time unit is collectively called a time window, and the number of time units contained in a time window is called a time window. the size of.
  • the terminal device can determine the feedback information according to the number of configured carriers, for example, according to the total downlink assignment index (T-DAI) and the counter downlink assignment index (C- -DAI) Determine HARQ feedback information.
  • T-DAI total downlink assignment index
  • C- -DAI counter downlink assignment index
  • C-DAI is the cumulative number of ⁇ carrier, time unit ⁇ pairs scheduled by PDCCH up to the current time unit within the time window (it may also include the number of PDCCH used for SPS release indication); or The cumulative number of PDCCHs up to the time unit; or the cumulative number of PDSCH transmissions up to the current time unit; or up to the current serving cell and/or the current time unit, there are PDSCH transmissions related to PDCCH (for example, scheduled by PDCCH) , And/or, there is a cumulative number of ⁇ carrier, time unit ⁇ pairs indicating the PDCCH released by semi-persistent scheduling (SPS); or to the current serving cell and/or current time unit, the base station has scheduled the corresponding PDCCH The cumulative number of PDSCHs and/or PDCCHs indicating SPS release; or the cumulative number of PDSCHs scheduled by the base station to the current serving cell and/or current time unit (the PDSCH is the PDSCH with corresponding PDCCH and/or PDC
  • T-DAI can be the total number of ⁇ carrier, time unit ⁇ pairs scheduled by PDCCH up to the current time unit within the time window (it can also include the number of PDCCHs used for semi-persistent scheduling release indication); or Up to the current time unit, the total number of PDSCH transmissions; or up to the current serving cell and/or current time unit, there are PDSCH transmissions related to the PDCCH (for example, scheduled by PDCCH), and/or, used to indicate semi-persistent scheduling (SPS)
  • SPS semi-persistent scheduling
  • the PDSCH is a PDSCH with a corresponding PDCCH and/or a PDCCH indicating SPS release); or the total number of time units scheduled for PDSCH transmission to the current serving cell and/or current time unit by the base station.
  • the PDSCH is a PDSCH corresponding to a PDCCH and/or a PDCCH indicating SPS release).
  • the carrier in the embodiment of the present application may also be referred to as a carrier cell.
  • the base station is configured with two carriers, including the primary carrier cc1 and the secondary carrier cc2, where each grid in Figure 2 is one Time unit, assuming that the HARQ time window is 3, the primary carrier cc1 and the secondary carrier cc2 each have 3 time units.
  • the grid filled with D(n,m) indicates the time unit for PDSCH transmission or PDSCH scheduling.
  • the time unit is called the target time unit, where n represents the value of C-DAI in the current time unit, and m represents the value of T-DAI in the current time unit.
  • the PDSCH or time unit is scheduled by the scheduler of the carrier cell through DCI.
  • DL represents a downlink time slot
  • SL represents a reserved time slot
  • UL represents an uplink time slot
  • slot0, slot1, slot2, slot3, and slot4 each represent 1 time slot, that is, time unit.
  • the terminal device receives the DCI sent by the primary carrier cc1 and the secondary carrier cc2, obtains the C-DAI and T-DAI corresponding to the above-mentioned target time unit, and performs HARQ feedback according to each of the above-mentioned target time units, that is, feedback codebook information.
  • the target time unit T-DAI knows that there are a total of 4 target time units, so the terminal device feedback information is 4bit, each bit corresponds to a target time unit, 1 represents ACK, 0 represents NACK, the terminal device did not receive D(3, 4), so the terminal device only receives D(1,1), D(2,2) and D(4,4), and the decoding result of D(2,2) is received in error, so the final HARQ feedback information It is 1001, and the feedback information is also called HARQ dynamic feedback codebook. Since the size and arrangement content of the codebook are not fixed, it can also be called HARQ dynamic feedback codebook. It can be seen that C-DAI is used to indicate the cumulative number of PDSCH received by the user.
  • the same time unit is arranged in the order of primary cell and then secondary cell.
  • T-DAI is used to indicate the total number of PDSCHs that the user receives from all serving cells.
  • the unit the primary and secondary carriers must be calculated. Therefore, when the primary carrier cc1 and secondary carrier cc2 fill in the C-DAI and T-DAI of each target time unit, they need to know the PDSCH scheduling status of other cells in the same time unit to determine, so each cell needs to know each other In this way, the real-time requirements of the system are high, the design complexity is high, and it is not easy to realize.
  • the embodiments of the application provide a control information transmission method, a dynamic feedback codebook transmission method, an automatic retransmission method, a base station, a terminal device, and a computer storage medium.
  • Each primary and secondary carrier cell does not need to obtain each other’s scheduling status, that is, It enables the UE to determine and send the HARQ dynamic feedback codebook to solve the problem of high real-time requirements of the system.
  • the control information sending method provided by the application embodiment of this year can be applied to the application environment shown in FIG. 1 including at least one terminal equipment (UE) 10, which communicates with a base station (eNB) 20 through a wireless interface. Only one terminal device 10 and one base station 20 are shown in the figure.
  • the base station 20 may include multiple carrier cells, and the multiple carrier cells provide downlink data services for the terminal device 10 through carrier aggregation. It should be noted that the above-mentioned multiple carrier cells may be provided by one base station 20, or may be provided by multiple base stations respectively, for example, each base station provides carrier cells of one or more carrier frequency bands.
  • the terminal device 10 is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as aircraft, Balloons and satellites are classy).
  • the terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial control (industrial control) Wireless terminals in, self-driving (self-driving) wireless terminals, remote medical (remote medical) wireless terminals, smart grid (smart grid) wireless terminals, transportation safety (transportation safety) wireless terminals, Wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • VR virtual reality
  • AR augmented reality
  • Wireless terminals in, self-driving (self-driving) wireless terminals, remote medical (remote medical) wireless terminals, smart grid (smart grid) wireless terminals, transportation safety (transportation safety) wireless terminals, Wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the base station 20 is a device that connects the terminal to the wireless network, including but not limited to: evolved Node B (evolved Node B, eNB), home base station (for example, home evolved node B, or home node B, HNB), Baseband unit (BBU), base station (g nodeB, gNB), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), etc., in addition, can also include wifi access point (access point) , AP) and so on.
  • evolved Node B evolved Node B
  • eNB evolved Node B
  • home base station for example, home evolved node B, or home node B, HNB
  • BBU Baseband unit
  • base station g nodeB, gNB
  • transmission point transmitting and receiving point
  • TRP transmission point
  • TP transmission point
  • TP transmission point
  • TP transmission point
  • AP access point
  • a method for sending control information is provided in an exemplary embodiment of this application.
  • the method is applied to the base station 20 shown in FIG. 1, and the method specifically includes step 310 to step 370.
  • Step 310 Obtain the number of cells participating in carrier aggregation.
  • the base station when the base station provides downlink data services to terminal equipment through carrier aggregation, the base station needs to be configured in advance. For example, it is necessary to determine which transport blocks are sent in which carrier cells.
  • the primary carrier cell performs carrier aggregation Therefore, the primary carrier cell knows the number of cells participating in carrier aggregation. For each secondary carrier cell, the number of cells participating in long-wave aggregation can be obtained through the primary carrier cell. Since the number is the data necessary for each carrier cell to perform carrier aggregation services, Therefore, the current carrier cell can obtain the number of cells participating in carrier aggregation before performing carrier aggregation communication.
  • Step 320 Determine the ranking information of the current carrier cell among all the carrier cells
  • the ranking information can be expressed as the sequence numbers of each carrier, such as the primary carrier cc1 and the secondary carrier cc2 in FIG. 2.
  • the primary carrier cc1 The carrier cell where the carrier is located is ranked first, and the carrier cell where the secondary carrier cc2 is located is ranked second.
  • the carrier cell where the main carrier cc1 is still ranked first, and the remaining secondary carriers are sorted according to the system settings, for example, secondary carrier cc2 and secondary carrier cc3 are sorted, that is, sorted by cc1, cc2, and cc3
  • the smaller the serial number the higher the ranking.
  • Step 330 Determine whether a physical downlink shared channel PDSCH is scheduled in a time unit in the current time window, and the time unit in which the PDSCH is scheduled is a target time unit;
  • FIG. 4 a diagram showing the relationship between the time window and time unit sent by the primary carrier cc1 to the terminal device DCI.
  • Slot1 and slot2 schedule the PDSCH
  • the time unit means that the main carrier cc1 in slot1 and slot2 has PDSCH transmission, so the time unit target time unit corresponding to slot1 and slot2 on the main carrier cc1 mentioned above, the main carrier cc1 will send DCI to the terminal device in each target time unit, DCI includes C-DAI and T-DAI, and no time unit for scheduling PDSCH will not be sent.
  • the terminal equipment will feed back the HARQ dynamic feedback codebook to the main carrier cc1 in slot 4 on the UL.
  • Step 340 Determine a first count value corresponding to the target time unit according to the number of cells and the ranking information, and use the first count value corresponding to the target time unit as the counter-type downlink allocation of the target time unit Index C-DAI value;
  • C-DAI is used to indicate the cumulative number of PDSCH received by the user.
  • the traditional method is not used to calculate the C-DAI of the target time unit, but the C-DAI is directly assigned by the number of cells and the ranking information, that is, by the number of cells and the ranking information of the current carrier cell
  • the obtained first count value is assigned to C-DAI as the C-DAI value, where the first count value is calculated by default when other carrier cells in the same time unit have scheduled PDSCHs.
  • the secondary carrier cc2 has a scheduled PDSCH.
  • the secondary carrier cc2 learns the carrier cell’s The number is 2, and the order of the secondary carrier cc2 is determined to be 2. Therefore, when the default primary carrier cc1 is scheduled in the current time unit, the first count value of C-DAI is determined to be 2, and the same applies to the second time Unit, the primary carrier cc1 does not need to know whether the secondary carrier cc2 of the first time unit has scheduled PDSCH, the primary carrier cc1 directly obtains the first count value 3 according to the number of cells and the ranking information, and assigns the first count value 3 to the second The C-DAI of the time unit, where the above time unit with scheduled PDSCH is the target time unit. For a single carrier cell, there is no need to know how many target time units there are in the other carrier cells. You only need to fill in the C of the target time unit according to this step. -DAI.
  • Step 350 Determine a second count value corresponding to the target time unit according to the number of cells, and use the second count value corresponding to the target time unit as the total downlink allocation index T-DAI value of the target time unit ;
  • T-DAI is used to indicate the total number of PDSCHs that the user receives from all serving cells.
  • both the primary carrier cc1 and the secondary carrier cc2 need to know the status of the other party.
  • the traditional method is not used to calculate the T-DAI of the target time unit, but the T-DAI is directly assigned by the number of cells, that is, the second count value obtained by the number of cells is assigned to the T-DAI.
  • the second count value is calculated by default when other carrier cells in the same time unit have scheduled PDSCHs.
  • the secondary carrier cc2 has Schedule PDSCH.
  • the secondary carrier cc2 learns that the number of carrier cells is 2 according to the method in this step, so the default primary carrier cc1 is currently When the time unit is scheduled, the second count value of the T-DAI is determined to be 2. In the same way, for the second time unit, the primary carrier cc1 does not need to know whether the secondary carrier cc2 of the first time unit has scheduled PDSCH.
  • the carrier cc1 defaults that both the first time unit and the second time unit secondary carrier cc2 have scheduled PDSCHs, and the first count value 4 is obtained directly according to the number of cells, and the first count value 4 is assigned to the T-DAI of the second time unit, where
  • the above time unit with scheduled PDSCH is the target time unit. For a single carrier cell, there is no need to know how many target time units there are in the other carrier cells, and only the T-DAI of the target time unit needs to be filled in according to this step.
  • Step 360 Generate downlink control information DCI according to the C-DAI value and T-DAI value of the target time unit;
  • Step 370 Send the DCI to the terminal device.
  • the first count value corresponding to the target time unit is determined according to the number of cells and the current carrier cell sorting information
  • the target time unit is determined according to the number of cells
  • the first count value and the second count value corresponding to the target time unit are used as the C-DAI value and T-DAI value, respectively.
  • C-DAI and T-DAI need to be based on other
  • the embodiment of the present application determines the target time based on the number of carrier cells and the first count value and second count of the current carrier cell sorting information, which is equivalent to determining the target time by defaulting that other carrier cells are fully scheduled.
  • the corresponding C-DAI value and T-DAI value of the unit do not need to know the PDSCH scheduling status of other carrier cells in real time, which reduces the real-time requirements of the communication system, especially the base station, and allows the UE to feed back the dynamic feedback code that allows the HARQ to work normally Book.
  • step 340 includes the following steps:
  • Step 510 Determine the target time unit for which the PDSCH is scheduled in the current time window.
  • Step 520 Calculate the first count value corresponding to the target time unit according to the number of cells and the ranking information.
  • the first count value corresponding to the target time unit is directly calculated according to the number of cells and the ranking information.
  • N is an integer greater than or equal to 1
  • the sorting information includes the sorting sequence number M of the carrier cell.
  • M is an integer greater than or equal to 1
  • the first count value corresponding to the i-th time unit is M+N(i-1), where i is greater than or equal to 1.
  • the number of cells is 3, and the third time unit of the secondary carrier cc2 of the second carrier cell schedules the PDSCH, and the corresponding C-DAI value can be obtained as 7 through M+N(i-1).
  • Step 530 Use the second count value corresponding to the target time unit as the T-DAI value of the target time unit.
  • step 350 includes the following steps:
  • Step 610 Determine the target time unit for which the PDSCH is scheduled in the current time window.
  • Step 620 Calculate a second count value corresponding to the target time unit according to the number of cells.
  • the second count value corresponding to the target time unit can be directly calculated according to the number of cells. For example, in one embodiment, assuming that the number of cells participating in carrier aggregation is N, and N is an integer greater than or equal to 1, then the i-th The second count value corresponding to each time unit is N ⁇ i, where i is an integer greater than or equal to 1. It can be seen that only the position of the target time unit within the time window needs to be determined, and the corresponding second count value can be calculated. For example, the number of cells is 4, and the second time unit of the secondary carrier cc2 of the second carrier cell schedules the PDSCH, and the corresponding C-DAI value can be obtained as 8 through N ⁇ i.
  • Step 630 Use the second count value corresponding to the target time unit as the T-DAI value of the target time unit.
  • steps 510 to 530 describe how to fill in the C-DAI corresponding to the target time unit
  • steps 610 to step 630 describe how to fill in the T-DAI corresponding to the target time unit.
  • the target time unit is determined first, and then the first count value and the second count value corresponding to the target time unit are calculated.
  • the first count value of all time units in the current time window can also be calculated first And the second count value, and then select the first count value and the second count value of the time unit that schedules the PDSCH and assign them to C-DAI and T-DAI.
  • first count value and second count value are expressed in decimal notation (for example, the values of T-DAI and C-DAI are 1, 2, 3, 4, 5, and 6), which are only convenient for display and understanding
  • first count value and the second count value can be expressed in different digital forms, for example, can be expressed in binary, as long as the digital meaning can reflect the first count value and the second count value.
  • the indication information in DCI depends on the number of bits in the T-DAI and C-DAI fields in the DCI.
  • the T-DAI and C-DAI fields are 2 bits respectively, that is, the number of bits in two digits means: 1 is used 00 represents, 2 is represented by 01, 3 is represented by 10, 4 is represented by 11, 5 is represented by 00, 6 is represented by 01, and so on. Therefore, when calculating the specific value of T-DAI, you need to see how many cycles have been performed. For example, if the T-DAI field is cycled once, and the T-DAI field is 01, it means that the T-DAI value is 6; if the T-DAI field is The loop is repeated twice, and the T-DAI field is 10, which means that the T-DAI value is 11. C-DAI is similar and will not be repeated here. The details can be shown in Table 1. Similarly, when the values of C-DAI and T-DAI are determined, they can be converted into the domains of T-DAI and C-DAI according to the above rules.
  • FIG 7 is a schematic diagram of a time unit arrangement.
  • the base station is configured with 2 carriers, including the main For the carrier cc1 and the secondary carrier cc2, assuming that the HARQ time window is 3, the primary carrier cc1 and the secondary carrier cc2 each have 3 time units.
  • the content of each time unit is represented by D(n, m), where n represents the value of C-DAI in the current time unit, and m represents the value of T-DAI in the current time unit.
  • the PDSCH or time unit is scheduled by the scheduler of the carrier cell through DCI.
  • DL represents the downlink time slot
  • SL represents the reserved time slot
  • UL represents the uplink time slot
  • slot0, slot1, slot2, slot3, and slot4 represent each 1 time slot, that is, time unit.
  • the number of carriers and the PDSCH scheduling conditions of each time unit in Fig. 7 and Fig. 2 are the same. The following describes the difference between the control information sending method in the embodiment of the present application and FIG. 2 for each time unit.
  • the primary carrier cc1 does not schedule PDSCH
  • the secondary carrier cc2 has scheduled PDSCH
  • the primary carrier cc1 is scheduled with PDSCH
  • the secondary carrier cc2 does not schedule PDSCH.
  • the secondary carrier cc2 is also defaulted to have scheduled PDSCH, so the calculated primary carrier cc1 is in slot1
  • both the primary carrier cc1 and the secondary carrier cc2 are scheduled with PDSCH, and the primary carrier cc1 takes the value of C in the slot2 time unit.
  • the primary carrier cc1 and the secondary carrier cc2 respectively send the T-DAI and C-DAI of each target time unit mentioned above to the terminal device through DCI in each time slot.
  • the terminal device does not receive D(5,6), so the terminal device only D(2,2), D(3,4) and D(6,6) are received, and the decoding result of D(3,4) is received in error.
  • the primary carrier cc1 and secondary carrier cc2 do not need to know whether the PDSCH of other carrier cells are scheduled when filling in T-DAI and C-DAI, which can reduce the real-time requirements of the communication system, especially the base station, and make the system design simple ,
  • the control information sending method of the embodiment of the present application does not need to change the judgment rule of the terminal device, and the terminal device can also feed back a dynamic feedback codebook that can realize the normal operation of HARQ.
  • the actual data input of each time unit in Fig. 7 is shown in Fig. 8.
  • the DCI further includes a hybrid automatic repeat request identifier HARQID corresponding to the target time unit.
  • HARQID is used to identify the transmission block sent by the carrier cell to the terminal device.
  • the terminal device can determine the transport block according to the HARQID to accurately receive information; on the other hand, the base station can determine the transport block that needs to be retransmitted according to the HARQID.
  • a method for sending a dynamic feedback codebook provided by an embodiment of this application is applied to a terminal device, where the terminal device is a device with a wireless transceiver function and can be deployed on land, including indoors. Or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, and satellites, etc.).
  • the terminal may be a mobile phone, a tablet computer, a computer with wireless transceiver functions, a virtual reality terminal, an augmented reality terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, and a smart grid.
  • Step 910 Obtain DCI sent by multiple carrier cells, where the DCI is sent by the carrier cell according to the control information sending method described in any of the above embodiments, and the DCI includes the C-DAI and T- of the target time unit. DAI.
  • the terminal device obtains the DCI sent by each carrier cell through the PDCCH, and the data information sent through the PDSCH.
  • the data information includes multiple transmission blocks, and the DCI includes the C-DAI and T-DAI of each target time unit.
  • DAI also includes the HARQID corresponding to each target time unit, and the HARQID also corresponds to the transmission speed in the data information.
  • Step 920 Fill in the hybrid automatic repeat request HARQ dynamic feedback codebook according to the values of C-DAI and T-DAI of each time unit;
  • the terminal device firstly determines whether the decoding of each transmission block is correct, and fills in the HARQ dynamic feedback codebook according to the determination result.
  • the terminal device determines the corresponding value of each transmission block according to the C-DAI and T-DAI values of each time unit.
  • the terminal device receives D(2,2), D(3,4) and D(6,6), where D (3,4) The decoding result of the corresponding transmission block is incorrectly received, so the transmission block corresponding to D(3,4) needs to be retransmitted.
  • the terminal device will also judge that D(1,2), D(4, 4) and D(5,6), so the base station will also be instructed to retransmit the transmission blocks corresponding to D(1,2), D(4,4) and D(5,6).
  • the HARQ feedback information determined by the terminal device is 010001, where 1 represents ACK, 0 represents NACK, and the base station needs to retransmit the corresponding transport block.
  • Step 930 Send the HARQ dynamic feedback codebook to the carrier cell.
  • an automatic retransmission method provided by an embodiment of this application is applied to a base station, where a base station is a device that connects a terminal to a wireless network, including but not limited to: Evolved Node B , Home base stations, baseband units, base stations, transmission points, transmission points, etc., in addition, wifi access points, etc. may also be included.
  • a base station is a device that connects a terminal to a wireless network, including but not limited to: Evolved Node B , Home base stations, baseband units, base stations, transmission points, transmission points, etc., in addition, wifi access points, etc. may also be included.
  • Step 1010 Receive the HARQ dynamic feedback codebook from the terminal device.
  • the HARQ dynamic feedback codebook is sent by the terminal device according to the dynamic feedback codebook sending method described in any one of the above embodiments, and the HARQ dynamic feedback codebook includes feedback information of at least one transport block .
  • the HARQ feedback information sent by the terminal device to the carrier cell is 010001.
  • Step 1020 According to the HARQ dynamic feedback codebook, confirm the HARQID corresponding to each transmission block, and determine a target transmission block, where the target transmission block is the valid transmission block corresponding to the HARQID.
  • the carrier corresponding to each bit in the HARQ feedback information and the time unit for scheduling the PDSCH can be determined, so it can be determined that the corresponding time unit is sent to the terminal device through the PDSCH The transport block sent. If the HARQID corresponding to the current bit of the HARQ feedback information is incorrect, it means that the carrier cell has not sent the transport block in the corresponding time unit, and the bit is skipped and no processing is performed.
  • the DCI of the terminal equipment is scheduled for each carrier by default, but for the time cells that are not scheduled, the C-DAI and T-DAI of the time unit are not actually sent, but the terminal equipment will determine that the time unit missed the C-DAI. DAI and T-DAI, so as to feed back to the carrier cell the command to retransmit the transport block corresponding to the time unit.
  • the carrier cell needs to confirm the correct HARQID to retransmit the transport block. The misjudgment of the upper terminal device will not cause the redundant transmission block to be retransmitted, and the entire HARQ scheme can still be executed normally.
  • Step 1030 Retransmit the target transport block according to the feedback information.
  • the retransmission operation can be performed on the target transport block that needs to be retransmitted according to the feedback information.
  • 1 represents ACK, which means no retransmission is required
  • 0 represents NACK, and the corresponding transport block needs to be retransmitted.
  • FIG. 11 a schematic diagram of a time unit arrangement according to an embodiment of the present application.
  • the scheduler where the primary carrier cc1 is located schedules the UE in slot 0.
  • the scheduler where the primary carrier cc1 is located schedules the UE in slot1.
  • the number of bits of the dynamic codebook that needs to be fed back on slot 4 is 6, and it is sent to the base station.
  • the base station receives the 6-bit dynamic codebook code stream of the UE, and analyzes the ACK/NACK result of the corresponding bit position according to the primary and secondary carrier sequence and time domain sequence, and the effective HARQID.
  • FIG. 12 a schematic diagram of a time unit arrangement according to an embodiment of the present application.
  • the scheduler where the primary carrier is located is for slot1, because there is no scheduling, and there is no need to send DCI and process HARDID, and the scheduler where the secondary carrier is for slot1, because there is no scheduling, there is no need to send DCI and process HARDID.
  • the scheduler where the primary carrier is located is for slot2, because there is no scheduling, and there is no need to send DCI and process HARDID, and the scheduler where the secondary carrier is for slot2, because there is no scheduling, there is no need to send DCI and process HARDID.
  • the number of bits of the dynamic codebook that needs to be fed back on slot 4 is 2, and it is sent to the base station.
  • the base station receives the dynamic codebook code stream 2 bits of the UE, and parses the ACK/NACK result of the corresponding bit position according to the primary and secondary carrier sequence and time domain sequence, and the effective HARQID.
  • FIG. 13 a schematic diagram of a time unit arrangement according to an embodiment of the present application.
  • the scheduler is for slot1, because there is no scheduling, there is no need to send DCI and process HARDID
  • the scheduler where the secondary carrier cc3 is for slot1 because there is no scheduling, there is no need to send DCI and process HARDID
  • the scheduler where the primary carrier cc1 is located is for slot2, because there is no scheduling, there is no need to send DCI and process HARDID, and the scheduler where the secondary carrier cc2 is for slot2, because there is no scheduling, there is no need to send DCI and process HARDID, and the schedule where the secondary carrier cc3 is The device is aimed at slot2, because there is no scheduling, there is no need to send DCI and process HARDID.
  • the number of bits of the dynamic codebook that needs to be fed back on slot 4 is 6, and it is sent to the base station.
  • the base station receives the 6-bit dynamic codebook code stream of the UE, and analyzes the ACK/NACK result of the corresponding bit position according to the primary and secondary carrier sequence and time domain sequence, and the effective HARQID.
  • a base station provided by an embodiment of the present application includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor.
  • the processor implements any of the foregoing when the computer program is executed.
  • the control information sending method described in the embodiment or the automatic retransmission method described in any of the foregoing embodiments may be implemented.
  • a mobile terminal provided by an embodiment of the present application includes: a memory, a processor, and a computer program stored in the memory and running on the processor.
  • the processor executes the computer program when the computer program is executed.
  • the dynamic feedback codebook transmission method described in any of the foregoing embodiments.
  • An embodiment of the present application provides a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are used to execute the control information sending method described in any of the above-mentioned embodiments, or execute the method described in any of the above-mentioned embodiments.
  • the embodiments of the application provide a control information transmission method, a dynamic feedback codebook transmission method, an automatic retransmission method, a base station, terminal equipment, and computer storage medium.
  • Each primary and secondary carrier cell does not need to obtain each other’s scheduling status to allow the UE It can determine and send HARQ dynamic feedback codebook to solve the problem of high real-time requirements of the system.
  • the first count value corresponding to the target time unit is determined according to the number of cells and the current carrier cell ranking information
  • the target time unit corresponding to the target time unit is determined according to the number of cells
  • the second count value of the target time unit is the first count value and the second count value corresponding to the target time unit as the C-DAI value and T-DAI value, respectively.
  • C-DAI and T-DAI need to be based on other carriers Compared with determining the PDSCH scheduling status of the cell, the embodiment of the present application determines the target time unit based on the number of carrier cells and the first count value and second count of the ranking information of the current carrier cell, which is equivalent to determining the target time unit by defaulting that other carrier cells are fully scheduled
  • the corresponding C-DAI value and T-DAI value do not need to know the PDSCH scheduling status of other carrier cells in real time, reducing the real-time requirements of the communication system, especially the base station, and allowing the UE to feed back a dynamic feedback codebook that allows HARQ to work normally.
  • the device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • Computer storage medium includes volatile and non-volatile data implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data).
  • Information such as computer-readable instructions, data structures, program modules, or other data.
  • Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or Any other medium used to store desired information and that can be accessed by a computer.
  • a communication medium usually contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. .

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Abstract

L'invention concerne un procédé d'envoi d'informations de commande, un procédé d'envoi de livre de codes de rétroaction dynamique, une station de base et un terminal. Ledit procédé comprend les étapes consistant à : en fonction du nombre de cellules et du classement des informations des cellules porteuses actuelles, déterminer une première valeur de comptage correspondant à une unité de temps cible ; en fonction du nombre de cellules, déterminer une seconde valeur de comptage correspondant à chacune des unités temporelles cibles ; et prendre la première valeur de comptage et la seconde valeur de comptage correspondant à l'unité de temps cible en tant que valeur d'indice d'attribution de liaison descendante de compteur (C-DAI) et valeur d'indice d'attribution de liaison descendante totale (T-DAI), respectivement.
PCT/CN2021/078459 2020-06-23 2021-03-01 Procédé d'envoi d'informations de commande, procédé d'envoi de livre de codes de rétroaction dynamique, station de base et terminal WO2021258764A1 (fr)

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WO2023226967A1 (fr) * 2022-05-27 2023-11-30 大唐移动通信设备有限公司 Procédé et appareil de détermination de livre de codes dynamique, et dispositif de communication

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CN110086583A (zh) * 2018-01-26 2019-08-02 电信科学技术研究院有限公司 一种dai的指示方法、用户终端和网络侧设备
WO2020026296A1 (fr) * 2018-07-30 2020-02-06 株式会社Ｎｔｔドコモ Terminal d'utilisateur et procédé de communication sans fil

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CN107294660A (zh) * 2016-03-31 2017-10-24 电信科学技术研究院 一种ack/nack反馈序列确定方法和装置
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