WO2020087544A1

WO2020087544A1 - Data scheduling method, device, and system

Info

Publication number: WO2020087544A1
Application number: PCT/CN2018/113840
Authority: WO
Inventors: 罗之虎; 李军; 金哲
Original assignee: 华为技术有限公司
Priority date: 2018-11-02
Filing date: 2018-11-02
Publication date: 2020-05-07
Also published as: CN112997568B; CN112997568A

Abstract

Provided in the embodiments of the present application are a data scheduling method, device, and system, enabling one DCI to schedule a greater number of TB without increasing the HARQ buffer size. The method comprises: a terminal device receives from a network device first downlink control information DCI, the first DCI being used for scheduling N transport blocks TB, N being a positive integer greater than 1; on the basis of the first DCI, the terminal device receives from the network device M TB amongst the N TB , M being a positive integer less than N, and the value of M at least being related to one of the following: the type of the terminal device; the coverage enhancement mode of the terminal device; or the number of hybrid automatic repeat request HARQ processes used by the terminal device; the terminal device sends to the network device an acknowledgement ACK of the M TB; and, on the basis of the first DCI, the terminal device receives from the network device the TB other than the M TB amongst the N TB.

Description

Data scheduling method, equipment and system

Technical field

The present application relates to the field of communications, and in particular to data scheduling methods, devices, and systems.

Background technique

With the development of Internet of Things (IoT) technology, the demand for IoT design in IoT applications is also increasing. In order to meet these demands, the 3rd Generation Partnership Project (3GPP) of the Mobile Communications Standards Organization adopted a new research topic at the 62nd plenary session of the Radio Access Network (RAN) # 62 The method of supporting the extremely low complexity and low cost of the Internet of Things in the cellular network, and at the RAN # 69 meeting was established as a narrowband Internet of Things (NB-IoT) topic.

Currently, for downlink transmission, before the NB-IoT system version (release, Rel) 16, it supports a downlink control information (downlink control information, DCI) to schedule a transport block (TB); while in the NB-IoT system In Rel16, one DCI supports scheduling multiple TBs, which can reduce DCI overhead.

However, if multiple TBs are scheduled through one DCI, increasing the number of scheduled TBs will increase the hybrid automatic repeat request (HARQ) buffer size of the terminal device and increase the terminal device The size of the HARQ buffer will affect the cost of the terminal equipment, so how to make a DCI can schedule more TB without increasing the size of the HARQ buffer is a problem that needs to be solved urgently.

Summary of the invention

The embodiments of the present application provide a data scheduling method, device, and system, which can enable a DCI to schedule more TBs without increasing the HARQ buffer size.

To achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

In a first aspect, a method for data scheduling is provided. The method includes: a terminal device receives first downlink control information DCI from a network device, where the first DCI is used to schedule N transport blocks TB, where N is a positive integer greater than 1 The terminal device receives M TB of the N TBs from the network device according to the first DCI, where M is a positive integer less than N, and the value of M is at least related to one of the following: the type of the terminal device; the terminal The coverage enhancement mode of the device; or, the number of hybrid automatic repeat request HARQ processes used by the terminal device; the terminal device sends the M TB ACK to the network device; the terminal device receives N from the network device according to the first DCI TBs other than M TBs out of TBs. Because in the embodiment of the present application, for multiple TBs scheduled by the first DCI, the network device may first send part of the TB to the terminal device. Furthermore, after receiving the ACK of this part of the TB, the network device sends the other TBs other than the part of the TB to the terminal device. Therefore, based on the data scheduling method provided in the embodiment of the present application, a DCI can schedule more TBs without increasing the HARQ buffer size.

In a possible design, the terminal device receives TBs other than M TBs out of N TBs from the network device according to the first DCI, including: the terminal device listens to the second DCI within the first time unit; if the terminal device The second DCI is not monitored within the first time unit, and the terminal device receives TBs other than M TBs out of N TBs from the network device according to the first DCI. That is to say, in the embodiments of the present application, in order to avoid inconsistent understanding or behavior of the terminal device and the network device, the terminal device continues to monitor the second DCI for a period of time after sending M TB ACKs to the network device. To the second DCI, continue to receive TBs out of the N TBs except M TBs according to the first DCI, thereby ensuring the reliability of the solution.

Exemplarily, the first duration unit may be equal to k second duration units, where the second duration unit includes a physical downlink control channel period, subframe, radio frame, system frame, superframe, or ms, and k is a positive integer.

In a possible design, the method further includes: the terminal device receives configuration information from the network device; and the terminal device determines the first duration unit according to the configuration information. Based on this solution, the terminal device can learn the first time unit.

In a possible design, the configuration information is used to indicate the number k of the second duration unit. The second duration unit includes a physical downlink control channel period, subframe, radio frame, system frame, superframe, or ms, where k is Positive integer. Correspondingly, the terminal device determining the first duration unit according to the configuration information includes: the terminal device determining the number k of the second duration unit according to the configuration information; the terminal device determining the first duration unit according to the number k of the second duration unit Duration unit. Based on this solution, the terminal device can learn the first time unit.

In a possible design, the terminal device receives TBs out of the N TBs other than the M TBs from the network device according to the first DCI, including: 1 physical downlink control channel candidate, or the first to s physical downlink control channel candidates after the terminal device monitors subframe n2 + k1, and subframe n2 is the last subframe carrying the ACKs of the M TBs , K1 is 0 or a preset positive integer value, and s is a preset positive integer value; if the terminal device does not listen to the second DCI on the physical downlink control channel candidate, the terminal device selects from the network device according to the first DCI Among the N TBs, TBs other than the M TBs are received. That is to say, in the embodiments of the present application, in order to avoid inconsistent understanding or behavior of the terminal device and the network device, the terminal device continues to monitor the second DCI for a period of time after sending M TB ACKs to the network device. To the second DCI, continue to receive TBs out of the N TBs except M TBs according to the first DCI, thereby ensuring the reliability of the solution.

In a possible design, the repetition level of the first physical downlink control channel candidate is the same as the repetition number of the first DCI; or, any physical downlink of the first to s physical downlink control channel candidates The repetition level of the control channel candidate is the same as the repetition number of the first DCI.

In a possible design, the terminal device receiving TBs out of the N TBs out of the M TBs from the network device according to the first DCI includes: the terminal device uses subframes according to the first DCI The first valid subframe after n1 + k2 is the starting subframe, and TBs other than the M TBs out of the N TBs are received from the network device, where the subframe n1 is to carry the first physical The last subframe of the downlink control channel candidate, or the subframe n1 is the last subframe carrying the sth physical downlink control channel candidate, and k2 is 0 or a preset positive integer value.

In a second aspect, a method for data scheduling is provided. The method includes: a network device sends first downlink control information DCI to a terminal device, where the first DCI is used to schedule N transport blocks TB, where N is a positive integer greater than 1 ; The network device sends M TB of the N TBs to the terminal device, where M is a positive integer less than N, and the value of M is at least related to one of the following: the type of the terminal device; the coverage of the terminal device Enhanced mode; or, the hybrid automatic repeat request HARQ process used by the terminal device is off; the network device receives the M TB ACK from the terminal device; the network device sends the N TB to the terminal device TB other than the M TBs. Because in the embodiment of the present application, for multiple TBs scheduled by the first DCI, the network device may first send part of the TB to the terminal device. Furthermore, after receiving the ACK of this part of the TB, the network device sends the other TBs other than the part of the TB to the terminal device. Therefore, based on the data scheduling method provided in the embodiment of the present application, a DCI can schedule more TBs without increasing the HARQ buffer size.

In a possible design, the network device sends the TB of the N TBs other than the M TBs to the terminal device, including: the network device sends the N to the terminal device after the first time unit arrives TBs other than the M TBs in the TBs. That is to say, in the embodiments of the present application, in order to avoid inconsistent understanding or behavior of the terminal device and the network device, after receiving M TB ACKs from the terminal device, the network device sends the N TBs to the terminal device after a period of time arrives In addition to the M TB, the reliability of the solution can be ensured.

In a possible design, the first time unit is equal to k second time units, and the second time unit includes a physical downlink control channel period, subframe, radio frame, system frame, superframe, or ms, and k is Positive integer.

In a possible design, the method further includes the network device sending configuration information to the terminal device, where the configuration information is used to determine the first time unit. Based on this solution, the terminal device can learn the first time unit.

In a possible design, the network device sends the TB of the N TBs other than the M TBs to the terminal device, including: the network device uses the first valid subframe after the subframe n1 + k2 Is the starting subframe, sending the TB of the N TBs other than the M TBs to the terminal device, where the subframe n1 is the first physical downlink control channel candidate after carrying the subframe n2 + k1 The last subframe, or the subframe n1 is the last subframe of the sth physical downlink control channel candidate after carrying subframe n + k1, and the subframe n2 is the last subframe carrying the M TB ACKs , K1 is 0 or a preset positive integer value, k2 is 0 or a preset positive integer value, and s is a preset positive integer value. That is to say, in the embodiments of the present application, in order to avoid inconsistent understanding or behavior of the terminal device and the network device, after receiving M TB ACKs from the terminal device, the network device sends the N TB to the terminal device after a period of time In addition to the M TB, the reliability of the solution can be ensured.

In a third aspect, a data scheduling method is provided. The method includes: a terminal device receives first downlink control information DCI from a network device, where the first DCI is used to schedule N transport blocks TB, each of the N TBs The transmission block size of TB is related to the total number of soft channel bits of the terminal device; or, the transmission block size of each TB of the N TBs is related to the maximum transmission block size supported by the terminal device; or, the N TB The number of subframes mapped by each TB in is related to the total number of soft channel bits of the terminal device; or, the maximum number of subframes mapped by each TB of the N TBs and the maximum number of subframes that can be mapped by each TB Value correlation, the number of resource units of each TB of the N TBs is related to the total number of soft channel bits of the terminal device; or, the number of resource units of each TB of the N TBs and the maximum transmission supported by the terminal device The block size is related, and N is a positive integer greater than 1; the terminal device receives the N TBs from the network device according to the first DCI. In the embodiment of the present application, for multiple TBs scheduled by the first DCI, the size of the transmission block of each TB in the multiple TBs is related to the total number of soft channel bits of the terminal device; or, the number of each TB in the multiple TBs The transport block size is related to the maximum transport block size supported by the terminal device; or, the number of subframes mapped by each TB in multiple TBs is related to the total number of soft channel bits of the terminal device; or, each TB mapped in multiple TBs The number of subframes is related to the maximum number of subframes that can be mapped to each TB; or, the number of resource units per TB in multiple TBs is related to the total number of soft channel bits of the terminal device 60; or, multiple TBs The number of resource units per TB is related to the maximum transmission block size supported by the terminal device 60. Therefore, based on the data scheduling method provided in the embodiment of the present application, it can be ensured that the HARQ buffer occupied by multiple TBs does not exceed the HARQ buffer size, so that a DCI can schedule more TBs without increasing the HARQ buffer size .

According to a fourth aspect, a data scheduling method is provided. The method includes: a network device sends first downlink control information DCI to a terminal device, where the first DCI is used to schedule N transport blocks TB, each of the N TBs The transmission block size of TB is related to the total number of soft channel bits of the terminal device; or, the transmission block size of each TB of the N TBs is related to the maximum transmission block size supported by the terminal device; or, the N TB The number of subframes mapped by each TB in is related to the total number of soft channel bits of the terminal device; or, the maximum number of subframes mapped by each TB of the N TBs and the maximum number of subframes that can be mapped by each TB The value is related; or, the number of resource units of each TB of the N TBs is related to the total number of soft channel bits of the terminal device; or, the number of resource units of each TB of the N TBs is supported by the terminal device The maximum transmission block size is related, and N is a positive integer greater than 1; the network device sends the N TBs to the terminal device. For the technical effect of the fourth aspect, reference may be made to the technical effect of the foregoing third aspect, which is not repeated here.

With reference to the above third or fourth aspect, in a possible design, the transmission block size of each TB of the N TBs is related to the total number of soft channel bits of the terminal device, including: each of the N TBs The transmission block size of each TB is the same, and the transmission block size of each TB does not exceed N _soft / N, or R _m * N _soft / NN _CRC , N _{soft is} the total number of soft channel bits of the terminal device, and R _m is the mother The code rate, N _CRC is the number of CRC bits in the cyclic redundancy check.

With reference to the above third or fourth aspect, in a possible design, the transmission block size of each TB of the N TBs is related to the maximum transmission block size supported by the terminal device, including: the N TBs Each TB has the same transmission block size, and the transmission block size of each TB does not exceed TBS _max / N, where TBS _{max is} the maximum transmission block size supported by the terminal device.

With reference to the third aspect or the fourth aspect above, in a possible design, the number of subframes mapped by each TB of the N TBs is related to the total number of soft channel bits of the terminal device, including: the N TBs The number of subframes mapped per TB is the same, and the number of subframes mapped per TB does not exceed N _soft / (N * Q _m * N _RE ), where N _{soft is} the total number of soft channel bits of the terminal device, Q _m is the modulation order, and N _RE is the number of resource units that can be used for physical downlink shared channel transmission in a downlink physical resource block PRB.

With reference to the above third or fourth aspect, in a possible design, the number of subframes mapped by each TB of the N TBs is related to the maximum number of subframes that can be mapped by each TB, including: The number of subframes mapped by each TB of the N TBs is the same, and the number of subframes mapped by each TB does not exceed N _{sf, max} / N, where N _{sf, max} is the subframes that each TB can map The maximum number of frames.

With reference to the above third or fourth aspect, in a possible design, the number of resource units of each TB in the N TBs is related to the total number of soft channel bits of the terminal device, including: The number of resource units per TB is the same, and the number of resource units per TB does not exceed N _soft / N, or R _m * N _soft / NN _CRC , N _{soft is} the total number of soft channel bits of the terminal device, R _m is The mother code rate, N _CRC is the number of CRC bits in the cyclic redundancy check.

With reference to the above third or fourth aspect, in a possible design, the number of resource units of each TB in the N TBs is related to the maximum transmission block size supported by the terminal device, including: The number of resource units per TB is the same, and the number of resource units per TB does not exceed TBS _max / N, where TBS _{max is} the maximum transmission block size supported by the terminal device.

According to a fifth aspect, there is provided a terminal device having a function of implementing the method described in the first aspect or the third aspect. This function can be realized by hardware, and can also be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a sixth aspect, a terminal device is provided, including: a processor and a memory; the memory is used to store computer-executed instructions, and when the terminal device is running, the processor executes the computer-executed instructions stored in the memory, so that the The terminal device performs the data scheduling method according to any one of the first aspect or the third aspect.

According to a seventh aspect, a terminal device is provided, including: a processor; the processor is configured to couple with a memory and read an instruction in the memory, and then execute any of the first aspect or the third aspect according to the instruction An item of data scheduling method.

According to an eighth aspect, a computer-readable storage medium is provided, in which instructions are stored in the computer-readable storage medium, which when run on a computer, enables the computer to perform any of the above-mentioned first or third aspects. The data scheduling method described above.

In a ninth aspect, there is provided a computer program product containing instructions that, when run on a computer, enable the computer to perform the data scheduling method described in any one of the above first or third aspects.

According to a tenth aspect, an apparatus (for example, the apparatus may be a chip system) is provided. The apparatus includes a processor for supporting a terminal device to implement the functions mentioned in the first aspect or the third aspect, for example, according to the first DCI receives N TBs from network equipment. In a possible design, the device further includes a memory for storing necessary program instructions and data of the terminal device. When the device is a chip system, it may be constituted by a chip, or may include a chip and other discrete devices.

For the technical effects brought by any one of the design methods in the fifth aspect to the tenth aspect, please refer to the technical effects brought by the different design methods in the first aspect or the third aspect, which will not be repeated here.

According to an eleventh aspect, there is provided a network device having a function of implementing the method described in the second aspect or the fourth aspect. This function can be realized by hardware, and can also be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a twelfth aspect, a network device is provided, including: a processor and a memory; the memory is used to store computer-executed instructions, and when the network device is running, the processor executes the computer-executed instructions stored in the memory, so that The network device performs the data scheduling method according to any one of the above-mentioned second aspect or fourth aspect.

According to a thirteenth aspect, there is provided a network device, including: a processor; the processor is configured to couple with a memory and read an instruction in the memory, and then execute the second aspect or the fourth aspect according to the instruction according to the instruction Any one of the data scheduling methods.

According to a fourteenth aspect, a computer-readable storage medium is provided, in which instructions are stored in a computer-readable storage medium, which when executed on a computer, enables the computer to perform any one of the second aspect or the fourth aspect The data scheduling method.

According to a fifteenth aspect, there is provided a computer program product containing instructions that, when run on a computer, enable the computer to perform the data scheduling method according to any one of the second or fourth aspects.

In a sixteenth aspect, an apparatus (for example, the apparatus may be a chip system) is provided, and the apparatus includes a processor for supporting a network device to implement the functions mentioned in the second or fourth aspect, for example, acquiring N TB. In a possible design, the device further includes a memory for storing necessary program instructions and data of the network device. When the device is a chip system, it may consist of a chip, or it may contain a chip and other discrete devices.

The technical effects brought by any one of the design methods in the eleventh aspect to the sixteenth aspect can be referred to the technical effects brought by the different design methods in the second aspect or the fourth aspect, which will not be repeated here.

According to a seventeenth aspect, a communication system is provided. The communication system includes a terminal device and a network device. Wherein, the network device is used to perform the steps performed by the network device in the above-mentioned second aspect or the solution provided by the embodiments of the present application, and the terminal device is used to perform the steps in the above-mentioned first aspect or the solution provided by the embodiments of the present application. Steps performed by the terminal device; or, the network device is used to perform the steps performed by the network device in the above fourth aspect or in the solution provided by the embodiments of the present application, and the terminal device is used to perform the above third aspect or implemented in the present application The steps provided by the terminal device in the solution provided in the example.

These or other aspects of the present application will be more concise and understandable in the description of the following embodiments.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of an NPDCCH candidate provided by an embodiment of this application;

2 is a schematic diagram 1 of downlink scheduling provided by an embodiment of the present application;

3 is a schematic diagram 2 of downlink scheduling provided by an embodiment of the present application;

4 is a schematic structural diagram of a communication system according to an embodiment of the present application;

5 is a schematic structural diagram of a terminal device and a network device provided by an embodiment of this application;

6 is a schematic flowchart 1 of a data scheduling method according to an embodiment of the present application;

7 is a schematic diagram 3 of downlink scheduling provided by an embodiment of the present application;

8 is a schematic diagram 4 of downlink scheduling according to an embodiment of the present application;

9 is a schematic diagram 5 of downlink scheduling according to an embodiment of the present application;

10 is a schematic diagram 6 of downlink scheduling provided by an embodiment of the present application;

11 is a second schematic flowchart of a data scheduling method according to an embodiment of this application;

12 is a schematic diagram 1 of a position of a subframe n1 provided by an embodiment of the present application;

13 is a second schematic diagram of a position of a subframe n1 provided by an embodiment of the present application;

14 is a schematic diagram 3 of a position of a subframe n1 provided by an embodiment of the present application;

15 is a schematic diagram 4 of a position of a subframe n1 provided by an embodiment of the present application;

16 is a schematic diagram 7 of downlink scheduling provided by an embodiment of the present application;

17 is a schematic diagram 8 of downlink scheduling according to an embodiment of the present application;

18 is a schematic flowchart 3 of a data scheduling method according to an embodiment of the present application;

19 is a schematic structural diagram of another terminal device according to an embodiment of this application;

20 is a schematic structural diagram of another network device according to an embodiment of this application;

21 is a schematic structural diagram of yet another terminal device provided by an embodiment of this application;

22 is a schematic structural diagram of yet another network device provided by an embodiment of the present application.

detailed description

In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief introduction of related technologies of the present application is first given as follows.

First, IoT:

IoT is "Internet of Things". It extends the user end of the Internet to any item and item, so that information exchange and communication can be performed between any item and item. Such a communication method is also called machine type communication (MTC). Among them, the communicating nodes are called MTC terminals or MTC devices. Typical IoT applications include smart grid, smart agriculture, smart transportation, smart home, and environmental detection.

Since the Internet of Things needs to be applied in a variety of scenarios, such as from outdoor to indoor, from ground to underground, many special requirements are placed on the design of the Internet of Things. For example, because MTC terminals in certain scenarios are used in environments with poor coverage, such as electricity meters and water meters, which are usually installed indoors or even in basements and other places with poor wireless network signals, coverage enhancement technologies are needed to solve them. Or, because the number of MTC terminals in some scenarios is much larger than the number of people-to-person communication devices, that is, large-scale deployment is required, it is required to be able to obtain and use MTC terminals at a very low cost. Or, because the data packet transmitted by the MTC terminal in some scenarios is small and is not sensitive to delay, it is required to support a low-rate MTC terminal. Or, because in most cases, the MTC terminal is powered by a battery, but at the same time, in many scenarios, the MTC terminal requires to be able to use for more than ten years without replacing the battery, which requires the MTC terminal to be extremely low Power consumption comes to work.

In order to meet the above requirements, the 3GPP mobile communication standardization organization adopted a new research topic at the RAN # 62 plenary meeting to study the method of supporting the extremely low complexity and low cost of the Internet of Things in the cellular network, and the RAN # 69 The project approved at the meeting was NB-IoT.

Second, HARQ:

HARQ is a technology that combines forward error correction (FEC) and automatic repeat request (ARQ) methods. FEC adds redundant information to enable the receiver to correct some errors, thereby reducing the number of retransmissions. For errors that cannot be corrected by FEC, the receiving end requests the sending end to retransmit the TB through the ARQ mechanism. Among them, the receiving end uses an error detection code, that is, cyclic redundancy check (cyclic redundancy check, CRC), to detect whether the received TB has an error. If the receiving end does not detect an error, the receiving end will send an acknowledgement (acknowledgement, ACK) to the sending end. After receiving the ACK, the sending end will then send the next TB; or, if the receiving end detects an error, it will receive The end will send a negative acknowledgement (negativeacknowledgement, NACK) to the sender. After receiving the NACK, the sender will resend the last TB to the receiver.

Among them, the HARQ protocol exists at both the sending end and the receiving end, and the HARQ operation at the sending end includes sending and retransmitting TB, and receiving and processing ACK or NACK, and so on. The HARQ operation at the receiving end includes receiving TB and generating ACK or NACK.

In addition, HARQ is divided into uplink and downlink. Downlink HARQ is directed to the TB carried on the downlink shared channel (DL-SCH), and uplink HARQ is directed to the TB carried on the uplink shared channel (DL-SCH). Specifically, the uplink HARQ is a process flow of confirming and retransmitting the TB sent by the terminal device to the network device. Downlink HARQ is a process flow to confirm and retransmit the TB sent by the network device to the terminal device. The data scheduling method provided by the embodiments of the present application mainly relates to downlink HARQ.

Third, terminal category:

The definition of NB-IoT currently supports two types of terminal devices, namely category NB1 and category NB2 terminal devices. For detailed description, please refer to 3GPP technical standard (TS) 36.306, which is not repeated here. Among them, the downlink physical layer parameters of the terminal devices of category NB1 and category NB2 are shown in Table 1 below, and the uplink physical layer parameters of the terminal devices of category NB1 and category NB2 are shown in Table 2 below.

It can be seen from Table 1 that for terminal equipment of category NB1, the maximum number of DL-SCH transport blocks received in a transmission time interval (TTI) is 680, and one DL-SCH transport block received in a TTI The maximum number of bits is 680, and the total number of soft channel bits (total number of soft channels) is 2112; for terminal equipment of category NB2, the maximum number of bits of the DL-SCH transport block received in one TTI is 2536, in one TTI The maximum number of bits in a received DL-SCH transport block is 2536, and the total number of soft channel bits is 6400. Wherein, the total number of soft channel bits refers to the total number of soft channel bits available for HARQ processing. This value does not include the number of soft channel bits required for the dedicated broadcast HARQ process for decoding system information. For downlink transmission, the total number of soft channel bits limits the HARQ size of the terminal device.

It can be seen from Table 2 that for terminal equipment of category NB1, the maximum number of UL-SCH transport blocks received in one TTI is 1000, and the maximum number of bits of one UL-SCH transport block received in one TTI is 1000; and for category For the terminal equipment of NB2, the maximum number of bits of the UL-SCH transport block received in one TTI is 2536, and the maximum number of bits of one UL-SCH transport block received in one TTI is 2536.

Table I

Table II

Fourth, terminal coverage enhancement mode:

In the enhanced MTC (enhanced MTC, eMTC) system, the terminal device has two coverage enhancement modes, namely coverage enhancement (CE) mode A (mode A) and CE mode B (mode B). Among them, CE mode A corresponds to no repetition or less repetition, and CE mode B corresponds to larger repetition. Under Frequency Division Duplexing (FDD), the maximum number of HARQ processes supported by CE mode A is 8, and the maximum number of HARQ processes supported by CE mode B is 2.

Fifth, search space and physical downlink control channel candidates:

Taking the narrowband physical downlink control channel (NPDCCH) in the NB-IoT system as an example, the terminal device needs to monitor an NPDCCH candidate set to obtain DCI. The NPDCCH candidate set is called NPDCCH search space (SS ). Among them, the resources of the NPDCCH search space are periodically distributed. The network device may indicate the period of the NPDCCH search space and the starting position of the NPDCCH search space in each period to the terminal device through system messages or radio resource control (RRC) signaling. NPDCCH is blindly detected in the NPDCCH search space.

Among them, the parameters R _max , G and α _offset are carried in the system message or RRC signaling. R _max represents the maximum number of repetitions of the NPDCCH search space. After receiving the system message or RRC signaling, the terminal device determines the product of R _max and G as the period of the NPDCCH search space; determines R _max as the duration of the NPDCCH search space in each NPDCCH search space period; sets R The product of _max , G, and α _offset is determined as the interval between the start position of the period of the NPDCCH search space and the start position of the NPDCCH search space in the time domain, that is, G * R _max * α _offset means that The starting position of the period of the NPDCCH search space is shifted backward by G * R _max * α _offset length to be the starting position of the NPDCCH search space.

There can be multiple NPDCCH candidates in a period of an NPDCCH search space. FIG. 1 illustrates a schematic diagram of an NPDCCH candidate involved in an embodiment of the present application. The period of the NPDCCH search space is G * R _max , the duration of the NPDCCH search space in G * R _max is R _max effective subframes, the start position of the period of the NPDCCH search space and the start position of the NPDCCH search space The interval in the time domain is G * R _max * α _offset . There can be up to 15 NPDCCH candidates within a period of an NPDCCH search space. The repetition level of each NPDCCH candidate is R, the 0th to the 7th The repetition level R of each candidate is equal to R _max / 8, and the length of each candidate in the 0th to 7th candidates in the time domain is equal to R _max / 8 (that is, R _max of 8) For effective subframes, the repetition level R of each of the 8th to 11th candidates is equal to R _max / 4, and the length of each of the 8th to 11th candidates in the time domain is equal to R _max / 4 ( That is, R _max of 4) effective subframes, the repetition level R of each of the 12th to 13th candidates is R _max / 2, and each of the 12th to 13th candidates is at the time equal to the length of the domain R _max / 2 (i.e. 2 per R _max) valid subframe, the first candidate 14 was repeated rank R equals R _max, of 14 candidates Field is equal to the length of valid subframes R _max.

Sixth, effective subframe:

The definition of effective subframes is related to the specific communication system.

Taking the NB-IoT system as an example, the effective subframe may be called an NB-IoT downlink subframe. In the following situations, the terminal device in the NB-IoT system should assume that one subframe is the NB-IoT downlink subframe:

For example, the terminal equipment determines that the narrowband primary synchronization signal (narrowband primary synchronization signal (NPSS), or the narrowband secondary synchronization signal (narrowband secondary synchronization signal (NSSS), or the narrowband physical broadcast channel (NPBCH), or NB The subframes transmitted by the system information block type (SystemInformation block type1-NB) are NB-IoT downlink subframes.

Or, the terminal device receives configuration parameters, which are used to configure the NB-IoT downlink subframe. Furthermore, the terminal device can determine the NB-IoT downlink subframe according to the configuration parameter. The configuration parameter may be configured through system messages or RRC signaling, which is not specifically limited in this embodiment of the present application.

Taking the eMTC system as an example, the effective subframe may be referred to as a bandwidth-reduced low-complexity or coverage-enhanced (BL / CE) downlink subframe. The BL / CE downlink subframes can be configured through configuration parameters, which are configured through system messages or RRC signaling.

Seventh, HARQ process:

Currently, 1 HARQ performs scheduling corresponding to 1 TB. For terminal devices of category NB1, only one HARQ process is currently supported (can also be described as a single HARQ process); for terminal devices of category NB2, one HARQ process or two HARQ processes are currently supported.

Exemplarily, as shown in FIG. 2, it is a schematic diagram of downlink scheduling of one HARQ process. Among them, # means number, A / N means ACK or NACK feedback corresponding to TB under the same number of DCI. Specifically, in FIG. 2, in the downstream direction, the DCI with the number # 0 is used to schedule the TB with the number # 0, and the TB with the number # 0 belongs to the HARQ process 0. In the upstream direction, after receiving the TB with the number # 0, the terminal device may send an ACK or NACK with the TB with the number # 0 to the network device.

Or, exemplarily, as shown in FIG. 3, it is a schematic diagram of downlink scheduling of two HARQ processes. Among them, # represents the number, and A / N represents the ACK or NACK feedback corresponding to the TB under the same number as the DCI. Specifically, in FIG. 3, in the downstream direction, the DCI numbered # 0 is used to schedule the TB numbered # 0, the TB numbered # 0 belongs to the HARQ process 0; the DCI numbered # 1 is used to schedule the numbered TB # 1, TB number # 1 belongs to HARQ process 1. In the upstream direction, after receiving the TB with the number # 0, the terminal device can send the ACK or NACK of the TB with the number # 0 to the network device; after receiving the TB with the number # 1, the terminal device can send the number # 1 to the network device TB ACK or NACK.

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of this application, unless otherwise stated, "/" means that the related objects are in an "or" relationship, for example, A / B can mean A or B; "and / or" in this application "Is just an association relationship that describes the association object, indicating that there can be three kinds of relationships, for example, A and / or B, which can mean: A exists alone, A and B exist at the same time, B exists alone in three cases, where A , B can be singular or plural. And, in the description of the present application, unless otherwise stated, "plurality" means two or more than two. "At least one of the following" or a similar expression refers to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one item (a) in a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be a single or multiple . In addition, in order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same or similar items that have substantially the same functions and functions. Those skilled in the art may understand that the words "first" and "second" do not limit the number and execution order, and the words "first" and "second" do not necessarily mean different.

In addition, the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly explain the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. With the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

As shown in FIG. 4, it is a communication system 40 provided by an embodiment of the present application. The communication system 40 includes a network device 50 and one or more terminal devices 60 connected to the network device 50. The following uses the network device 50 to interact with any terminal device 60 as an example for description.

In a possible implementation manner, the network device 50 sends the first DCI to the terminal device 60 and sends M TBs of the N TBs to the terminal device 60. The first DCI is used to schedule N TBs, where N is greater than 1. Is a positive integer, M is a positive integer less than N, and the value of M is at least related to one of the following: the category of the terminal device 60; the coverage enhancement mode of the terminal device; or, the number of HARQ processes used by the terminal device 60. Correspondingly, the terminal device 60 receives the first DCI from the network device 50 and receives M TBs out of the N TBs from the network device 50 according to the first DCI. If the terminal device 50 decodes all M TBs correctly, the terminal device 60 sends ACKs of M TBs to the network device 50. Correspondingly, the network device receives ACKs of M TBs from the terminal device 60 and sends TBs out of the N TBs out of the M TBs to the terminal device 60, so that the terminal device 60 can slave the network device 50 according to the first DCI TBs other than M TBs out of N TBs are received.

The specific implementation of the above solution will be elaborated in the following embodiments and will not be repeated here.

Because in the embodiment of the present application, for multiple TBs scheduled by the first DCI, the network device may first send part of the TB to the terminal device. Furthermore, after receiving the ACK of this part of the TB, the network device sends the other TBs other than the part of the TB to the terminal device. Therefore, based on the communication system provided by the embodiment of the present application, a DCI can schedule more TBs without increasing the HARQ buffer size.

Or, optionally, in another possible implementation manner, the network device 50 sends the first DCI to the terminal device 60, and sends N TBs to the terminal device 60. Correspondingly, the terminal device 60 receives the first DCI from the network device 50 and receives N TBs from the network device 50 according to the first DCI. The first DCI is used to schedule N TBs, and the transmission block size of each TB of the N TBs is related to the total number of soft channel bits of the terminal device 60; or, the transmission block size of each TB of the N TBs It is related to the maximum transport block size supported by the terminal device 60; or, the number of subframes mapped by each TB of N TBs is related to the total number of soft channel bits of the terminal device 60; or, the number of mapped by each TB of N TBs The number of subframes is related to the maximum number of subframes that can be mapped per TB; or, the number of resource units per TB of N TBs is related to the total number of soft channel bits of the terminal device 60; or, the number of N TBs The number of resource units per TB is related to the maximum transmission block size supported by the terminal device 60, and N is a positive integer greater than 1.

In the embodiment of the present application, for multiple TBs scheduled by the first DCI, the size of the transmission block of each TB in the multiple TBs is related to the total number of soft channel bits of the terminal device; or, the number of each TB in the multiple TBs The transport block size is related to the maximum transport block size supported by the terminal device; or, the number of subframes mapped by each TB in multiple TBs is related to the total number of soft channel bits of the terminal device; or, each TB mapped in multiple TBs The number of subframes is related to the maximum number of subframes that can be mapped to each TB; or, the number of resource units per TB in multiple TBs is related to the total number of soft channel bits of the terminal device 60; or, multiple TBs The number of resource units per TB is related to the maximum transmission block size supported by the terminal device 60. Therefore, based on the communication system provided by the embodiment of the present application, it can be ensured that the HARQ buffer occupied by multiple TBs does not exceed the HARQ buffer size, so that a DCI can schedule more TBs without increasing the HARQ buffer size.

As shown in FIG. 5, it is a schematic diagram of the hardware structure of the network device 50 and the terminal device 60 provided by the embodiments of the present application.

The terminal device 60 includes at least one processor 601 (exemplarily illustrated in FIG. 5 including one processor 601), at least one memory 602 (exemplified illustrated in FIG. 5 including one memory 602), and At least one transceiver 603 (exemplarily illustrated in FIG. 5 by including one transceiver 603). Optionally, the terminal device 60 may further include an output device 604 and an input device 605.

The processor 601, the memory 602, and the transceiver 603 are connected through a communication line. The communication line may include a path to transfer information between the above components.

The processor 601 may be a general-purpose central processing unit (central processing unit, CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more used to control the execution of the program program of the application integrated circuit. In a specific implementation, as an embodiment, the processor 601 may also include multiple CPUs, and the processor 601 may be a single-CPU processor or a multi-CPU processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (eg, computer program instructions).

The memory 602 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (electrically erasable programmable-read-only memory (EEPROM), read-only compact disc (compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be used by a computer Access to any other media, but not limited to this. The memory 602 may exist independently, and is connected to the processor 601 through a communication line. The memory 602 may also be integrated with the processor 601.

The memory 602 is used to store computer execution instructions for executing the solution of the present application, and the processor 601 controls execution. Specifically, the processor 601 is used to execute computer execution instructions stored in the memory 602, so as to implement the data scheduling method described in the embodiments of the present application. Optionally, the computer execution instructions in the embodiments of the present application may also be called application program codes or computer program codes, which are not specifically limited in the embodiments of the present application.

The transceiver 603 can use any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, wireless access network (RAN), or wireless local area network (WLAN) Wait. The transceiver 603 includes a transmitter Tx and a receiver Rx.

The output device 604 communicates with the processor 601 and can display information in various ways. For example, the output device 604 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Wait.

The input device 605 communicates with the processor 601 and can accept user input in a variety of ways. For example, the input device 605 may be a mouse, a keyboard, a touch screen device, or a sensing device.

The network device 50 includes at least one processor 501 (exemplarily illustrated in FIG. 5 including one processor 501), and at least one memory 502 (exemplified illustrated in FIG. 5 including one memory 502), At least one transceiver 503 (exemplarily illustrated in FIG. 5 including one transceiver 503) and at least one network interface 504 (exemplified illustrated in FIG. 5 including one network interface 504). The processor 501, the memory 502, the transceiver 503, and the network interface 504 are connected through a communication line. Among them, the network interface 504 is used to connect to the core network device through a link (such as an S1 interface), or to connect to a network interface of other network devices through a wired or wireless link (such as an X2 interface) (not shown in FIG. 5) This is not specifically limited in the embodiments of the present application. In addition, for the relevant description of the processor 501, the memory 502, and the transceiver 503, reference may be made to the description of the processor 601, the memory 602, and the transceiver 603 in the terminal device 60, and details are not described herein again.

Optionally, the network device 50 in the embodiment of the present application refers to a device that accesses the core network or a chip that can be used in the device that accesses the core network, and the embodiment of the present application does not specifically limit this. The device connected to the core network may be, for example, a base station in a long term evolution (LTE) system (such as the aforementioned NB-IoT system, or eMTC system), a global system for mobile communication (GSM) ), The base station in the mobile communications system (UMTS), the code division multiple access (CDMA) system, or the public land mobile network (PLMN) that will evolve in the future ), The base station in broadband), the broadband network service gateway (broadband, network gateway, BNG), aggregation switches, non-3GPP (non-3GPP) network equipment, or equipment with a similar structure in FIG. 5, etc. The base station may include various forms of base stations, such as macro base stations, micro base stations (also called small stations), relay stations, and access points, which are not specifically limited in the embodiments of the present application.

Optionally, the network device 50 in the embodiment of the present application may also be referred to as an access network device or an access device, etc., which is not specifically limited in the embodiment of the present application.

Optionally, the terminal device 60 in the embodiment of the present application may be a device for implementing a wireless communication function, such as a terminal or a chip that can be used in the terminal, etc. The embodiment of the present application does not specifically limit this. The terminal may be an LTE system (such as the above-mentioned NB-IoT system or eMTC system), GSM, UMTS, CDMA system, or user equipment (UE), access terminal, terminal unit, or terminal in a future-evolving PLMN Station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, terminal agent or terminal device, etc. Access terminals can be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital processing (personal digital assistant (PDA), wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices or wearable devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial wireless terminal in control), wireless terminal in self-driving (self-driving), wireless terminal in remote medical (remote), wireless terminal in smart grid (smart), wireless in transportation safety (transportation safety) Terminals, wireless terminals in smart cities, wireless terminals in smart homes, etc. The terminal can be mobile or fixed.

The data scheduling method provided by the embodiment of the present application will be described in conjunction with FIGS. 1 to 5 below.

It should be noted that the name of the message between each network element or the name of each parameter in the message in the following embodiments of the present application is just an example, and other names may be used in the specific implementation, which is not specified in the embodiments of the present application. limited.

Taking the interaction between the network device 50 shown in FIG. 4 and any terminal device 60 as an example, as shown in FIG. 6, a data scheduling method provided by an embodiment of the present application includes the following steps:

S601. The network device sends configuration information to the terminal device. Correspondingly, the terminal device receives configuration information from the network device, and the configuration information is used to determine the first time unit.

Optionally, in the embodiment of the present application, the network device may send configuration information to the terminal device through RRC signaling; correspondingly, the terminal device may receive the configuration information from the network device through RRC signaling.

Or, optionally, in the embodiment of the present application, the network device may send configuration information to the terminal device through DCI. Correspondingly, the terminal device can receive the configuration information from the network device through DCI.

Optionally, in the embodiment of the present application, the first duration unit may be equal to k second duration units, and the second duration unit includes a physical downlink control channel period, subframe, radio frame, system frame, superframe, or ms, k is a positive integer. Exemplarily, the physical downlink control channel period may be an NPDCCH period, for example.

S602. The terminal device determines the first duration unit according to the configuration information.

Optionally, in a possible implementation manner, the configuration information may be the first duration unit.

Or, optionally, in another possible implementation manner, the configuration information is used to indicate the number k of the second duration units. Correspondingly, the terminal device determining the first duration unit according to the configuration information may include: the terminal device determining the number k of the second duration unit according to the configuration information; further, determining the first duration unit according to the number k of the second duration unit.

Exemplarily, assuming that the terminal device and the network device negotiate in advance that the second duration unit is the NPDCCH period, after the terminal device receives the number k of the second duration unit from the network device k = 3, the terminal device may determine that the first duration unit is 3 NPDCCH period.

It should be noted that step S601 and step S602 in the embodiment of the present application are optional steps, and the above step S601 and step S602 may not be executed. Instead, the terminal device and the network device negotiate the first duration unit in advance; or, configure the first duration unit on the terminal device in advance; or, the protocol stipulates the first duration unit, which is not specifically limited in this embodiment of the present application.

S603. The network device sends the first DCI to the terminal device. Correspondingly, the terminal device receives the first DCI from the network device. The first DCI is used to schedule N TBs, and N is a positive integer greater than 1.

That is to say, the first DCI in the embodiment of the present application can schedule multiple TBs.

Optionally, in the embodiment of the present application, time domain resources or frequency domain resources or code resources used for transmission of each TB among N TBs are different. In other words, each TB of the N TBs can be regarded as being transmitted independently.

It should be noted that, in the embodiment of the present application, when the above step S601 and step S602 are executed, there is no necessary execution order between step S601 and step S603, and step S601 may be executed first, followed by step S603; or Step S603 is performed first, followed by step S601; step S601 and step S603 may also be performed at the same time, which is not specifically limited in the embodiment of the present application.

S604. The network device sends M TB out of N TBs to the terminal device. Correspondingly, the terminal device receives M TBs out of N TBs from the network device according to the first DCI. Among them, M is a positive integer less than N.

That is to say, in the embodiment of the present application, the network device may first send a part of the N TBs scheduled by the first DCI to the terminal device.

In this embodiment of the present application, the value of M is at least related to one of the following: the category of the terminal device; the coverage enhancement mode of the terminal device; or, the number of HARQ processes used by the terminal device.

Exemplarily, taking the NB-IoT system as an example, if the terminal device type is category NB1, M = 1; or, if the terminal device type is category NB2, M = 2.

Or, exemplarily, when the number of HARQ processes used by the terminal device is 2, M = 2; or, when the number of HARQ processes used by the terminal device is 2, M = 1.

Exemplarily, the scenario where the number of HARQ processes used by the terminal device is 2 may be, for example, that the terminal device reports to the network device its ability to support 2 HARQ processes, and the network device notifies the terminal device to activate the 2 HARQ processes through a configuration message. At this time, the number of HARQ processes used by the terminal device is 2.

Exemplarily, the scenario where the number of HARQ processes used by the terminal device is 1 may be, for example, that the terminal device reports to the network device its ability to support 2 HARQ processes, and the network device does not notify the terminal device to activate the 2 HARQ processes through a configuration message. At this time, the number of HARQ processes used by the terminal device is 1.

Or, for example, the scenario where the number of HARQ processes used by the terminal device is 1 may be, for example, that the terminal device does not have the capability to support 2 HARQ processes, for example, the terminal device supports only 1 HARQ process. At this time, the number of HARQ processes used by the terminal device is 1.

Among them, as mentioned in the preamble of the specific implementation mode, in the NB-IoT system, for the terminal device of category NB1, only one HARQ process is currently supported; and for the terminal device of category NB2, it can currently support one HARQ process or For the 2 HARQ processes, the relevant description can refer to the description of the HARQ process in the preamble of the specific implementation mode, which will not be repeated here.

Optionally, in the embodiment of the present application, the network device sending M TBs of the N TBs to the terminal device may include: the network device sending M TBs of the N TBs to the terminal device according to the first DCI.

Optionally, in the embodiment of the present application, the number of M TBs may be continuous or non-continuous, which is not specifically limited in the embodiment of the present application. Exemplarily, M TBs are TBs with numbers # 0 to # (M-1), respectively, where # represents a number.

S605: After the terminal device demodulates and decodes M TBs, if all M TBs are decoded correctly, the terminal device sends ACKs of M TBs to the network device. Correspondingly, the network device receives ACKs of M terabytes from the terminal device.

Of course, when the terminal device demodulates and decodes M TBs, there may be one or more TB decoding errors. In this case, the terminal device sends ACK / NACK of M TBs to the network device.

Optionally, in the embodiment of the present application, the M TB ACK / NACK feedback has the following ways:

Manner 1: The ACK / NACK feedback of M TBs is independent feedback, that is, the ACK / NACK feedback information of each TB in the M TBs occupies 1 bit. Among them, ‘1’ means ACK, ‘0’ means NACK; or, ‘0’ means ACK, and ‘1’ means NACK. At this time, the ACK / NACK feedback information of the M TBs occupies M bits, and the ACK / NACK feedback information of each TB of the M TBs occupies different time-frequency resources during transmission.

Method 2: ACK / NACK feedback of M TBs is multiplexed feedback (HARQ-ACK multiplexing), that is, ACK / NACK feedback information of M TBs is indicated by M bits, from M bits to high bits ACK / NACK feedback information corresponding to the 1st TB to the Mth TB respectively; or, the M bits from the lower bit to the higher bit corresponding to the ACK / NACK feedback information from the 1st TB to the Mth TB, this The application examples do not specifically limit this.

Among them, M bits can be used for high-order modulation after channel coding, for example, the modulation method can include quadrature phase shift keying (QPSK), 16-order quadrature amplitude modulation (16 quadrature amplitude modulation, 16QAM), Or 64-order quadrature amplitude modulation (16 quadrature amplitude modulation, 16QAM), etc., which is not specifically limited in the embodiment of the present application.

For example, it is assumed that the low-order bits to the high-order bits of the M bits correspond to the ACK / NACK feedback information of the 1st TB to the Mth TB, respectively. Then, if M = 2, '1' means ACK, and '0' means NACK, then '10' may mean that the first TB decoding is wrong, and the second TB decoding is correct. Or, if M = 2, '1' means ACK, and '0' means NACK, then '11' may mean that both the first TB and the second TB are decoded correctly. Among them, QPSK can be used as the modulation method here.

Manner 3: ACK / NACK feedback of M TBs is bundled feedback (HARQ-ACK bundled), that is, M TB ACK / NACK feedback information occupies 1 bit. Among them, ‘1’ means ACK, ‘0’ means NACK; or, ‘0’ means ACK, and ‘1’ means NACK. At this time, the ACK / NACK feedback information of each TB of the M TBs can be obtained by AND operation to obtain 1-bit information. For example, M = 2, the ACK / NACK feedback information of the first TB of the M TBs is ACK, which is denoted by '1', and the ACK / NACK feedback information of the second TB is NACK, which is denoted by '0'. Expressed with '&', 1 & 0 = 0, so M TB ACK / NACK feedback can be obtained as NACK. Through HARQ-ACK bundling, it can be understood that the ACK / NACK feedback information of each TB of the M TBs occupies the same time-frequency resources during transmission.

S606. After the first time unit arrives, the network device sends TBs other than M TBs out of N TBs to the terminal device.

For the related description of the first time unit, reference may be made to the above step S601, which will not be repeated here.

Optionally, in the embodiment of the present application, the network device sending the TB of the N TBs other than the M TBs to the terminal device after the first time unit arrives may include: the network device according to the first DCI, at the first time After the unit arrives, it sends TBs out of M TBs out of N TBs to the terminal device.

In addition, in the embodiment of the present application, the previous subframe of the first time unit is the last subframe carrying ACKs of M TBs. That is to say, in the embodiment of the present application, after receiving M TB ACKs from the terminal device, the network device may start a timer whose duration is the first time unit. Furthermore, when the timer expires, it can be regarded as the arrival of the first time unit.

S607. The terminal device monitors the second DCI in the first duration unit.

In the embodiment of the present application, the previous subframe of the first time unit is the last subframe carrying ACKs of M TBs. That is to say, in the embodiment of the present application, after sending M TB ACKs to the network device, the terminal device may start a timer whose duration is the first time unit.

Optionally, the terminal device may stop the timer after monitoring the second DCI.

S608. If the terminal device does not listen to the second DCI in the first duration unit, the terminal device receives TBs other than M TBs out of N TBs from the network device according to the first DCI.

In the embodiment of the present application, the terminal device does not detect the second DCI in the first time unit may be understood as that the terminal device does not detect the second DCI when the timer whose duration is the first time unit expires.

Exemplarily, taking the NB-IoT system as an example, if the terminal device type is category NB1, M = 1. Assuming that the first DCI is used to schedule 2 TBs, the numbers of the 2 TBs are # 1 and # 2, the first duration unit is k * T _NPDCCH , T _NPDCCH is the NPDCCH period, and A / N means ACK / NACK feedback The corresponding schematic diagram of downlink scheduling may be as shown in FIG. 7. The network device first sends the TB with the number # 1 to the terminal device according to the first DCI. The terminal device receives the TB with the number # 1 from the network device according to the first DCI. If the ACK / NACK feedback of the TB numbered # 1 is ACK, and the terminal device does not hear the second DCI in the first time unit after sending the ACK / NACK feedback of the TB # 1 to the network device, the terminal device The first DCI receives the TB with the number # 2 from the network device.

Or, exemplarily, taking the NB-IoT system as an example, if the terminal device type is category NB2, M = 2. Assume that the first DCI is used to schedule 4 TBs, and the numbers of the 4 TBs are # 1, # 2, # 3, and # 4, the first duration unit is k * T _NPDCCH , T _NPDCCH is the NPDCCH period, and A / N indicates ACK / NACK feedback, the corresponding schematic diagram of downlink scheduling may be as shown in FIG. 8. The network device first sends the TB with the number # 1 and the TB with the number # 2 to the terminal device according to the first DCI. The terminal device receives the TB numbered # 1 and the TB numbered # 2 from the network device according to the first DCI. If the ACK / NACK feedback of the TB numbered # 1 and the ACK / NACK feedback of the TB numbered # 2 are both ACK, and the terminal device is sending the ACK / NACK of the TB numbered # 1 to the network device and the number # After the TB ACK / NACK feedback of 2 does not detect the second DCI in the first duration unit, the terminal device receives the TB numbered # 3 and the TB numbered # 4 from the network device according to the first DCI.

Optionally, in the embodiment of the present application, if the terminal device does not listen to the second DCI in the first duration unit, the terminal device considers that the M TB of new data indication (new data indication (NDI) has flipped .

In the above steps S605 to S608, after the terminal device sends M TB ACKs to the network device, the network device receives M TB ACKs from the terminal device as an example for description. Optionally, in the embodiment of the present application, after the terminal device sends M TB ACKs to the network device, the network device may not detect the M TB ACKs, or the network device may also send one of the M TB ACKs Or multiple false detections are NACK. At this time, the network device needs to send the second DCI to the terminal device, and then the terminal device can listen to the second DCI in the first duration unit and receive the retransmission of the TB according to the scheduling information of the second DCI. Optionally, it may also include receiving new transmissions of other TBs.

Or, optionally, in the embodiment of the present application, if the terminal device has at least one TB decoding error when demodulating and decoding M TBs, at this time, the terminal device sends M TB ACK / to the network device After NACK, the network device needs to send the second DCI to the terminal device, and then the terminal device can listen to the second DCI in the first duration unit, and receive the retransmission of the TB according to the scheduling information of the second DCI. Optionally, it may also include receiving new transmissions of other TBs.

That is to say, in the embodiment of the present application, no matter whether the feedback of the M TBs is all ACK, or part of it is ACK, if the terminal device hears the second DCI within the first time unit, it needs to receive according to the scheduling information of the second DCI TB retransmission. Optionally, it may also include receiving new transmissions of other TBs.

Exemplarily, taking the NB-IoT system as an example, if the terminal device type is category NB1, M = 1. Assuming that the first DCI is used to schedule 2 TBs, the numbers of the 2 TBs are # 1 and # 2, the first duration unit is k * T _NPDCCH , T _NPDCCH is the NPDCCH period, and A / N means ACK / NACK feedback, then The corresponding schematic diagram of downlink scheduling may be as shown in FIG. 9. The network device first sends the TB with the number # 1 to the terminal device according to the first DCI. The terminal device receives the TB with the number # 1 from the network device according to the first DCI. If the ACK / NACK feedback of the TB numbered # 1 is NACK, and the terminal device hears the second DCI in the first time unit after sending the ACK / NACK feedback of the TB # 1 to the network device, the terminal device The second DCI receives the TB with the number # 1 from the network device. Among them, TB numbered # 1 is retransmission.

Or, exemplarily, taking the NB-IoT system as an example, when the terminal device category is category NB2, M = 2. Assume that the first DCI is used to schedule 4 TBs, and the numbers of the 4 TBs are # 1, # 2, # 3, and # 4, the first duration unit is k * T _NPDCCH , T _NPDCCH is the NPDCCH period, and A / N indicates ACK / NACK feedback, the corresponding schematic diagram of downlink scheduling may be as shown in FIG. 10. The network device first sends the TB with the number # 1 and the TB with the number # 2 to the terminal device according to the first DCI. The terminal device receives the TB numbered # 1 and the TB numbered # 2 from the network device according to the first DCI. If the ACK / NACK feedback of the TB numbered # 1 is NACK, the ACK / NACK feedback of the TB numbered # 2 is ACK, the ACK / NACK feedback of the M TBs is independent feedback, and the terminal device is sending the number to the network device After the second DCI is heard in the first duration unit after the ACK / NACK feedback of TB # 1 and the ACK / NACK feedback of TB # 2, the terminal device receives the number # 1 from the network device according to the second DCI TB and TB numbered # 3. Among them, the TB numbered # 1 is a retransmission, and the TB numbered # 3 is a new transmission.

Optionally, in the embodiment of the present application, if the terminal device has at least one TB decoding error when demodulating and decoding M TBs, at this time, the terminal device sends M TB ACK / NACK to the network device If the network device misdetects that M TB ACKs have been received, or, although the network device correctly detects M TB ACK / NACKs, the second DCI terminal device sent to the terminal device does not listen within the first time unit At this point, the terminal device will not process it at this time.

Optionally, in the embodiment of the present application, if the number of TBs other than M TBs (that is, N-M) is greater than M, steps similar to steps S605-S608 need to be performed multiple times. For example, assuming that N = 4 and M = 1, the numbers of N TBs are # 0, # 1, # 2 and # 3, respectively. After the network device sends the TB numbered # 0 to the terminal device, if the terminal device decodes the TB numbered # 0 correctly, the terminal device sends an ACK of the TB numbered # 0 to the network device. After the network device receives the ACK of the TB numbered # 0 from the terminal device, it sends the TB numbered # 1 to the terminal device after the arrival of the first time unit. If the terminal device decodes the TB with the number # 1 correctly, the terminal device sends an ACK with the TB with the number # 1 to the network device. After receiving the ACK of the TB numbered # 1 from the terminal device, the network device sends the TB numbered # 2 to the terminal device after the first time unit arrives. If the terminal device decodes the TB with the number # 2 correctly, the terminal device sends an ACK with the TB with the number # 2 to the network device. After the network device receives the ACK of the TB numbered # 2 from the terminal device, it sends the TB numbered # 3 to the terminal device after the first time unit arrives. After the above four TBs are all sent, the network device may continue to send new DCI to the terminal device, and the new DCI is used to schedule other TBs, which is not specifically limited in this embodiment of the present application.

Because in the embodiment of the present application, for multiple TBs scheduled by the first DCI, the network device may first send part of the TB to the terminal device. Furthermore, after receiving the ACK of this part of the TB, the network device sends the other TBs other than the part of the TB to the terminal device. Therefore, based on the data scheduling method provided in the embodiment of the present application, a DCI can schedule more TBs without increasing the HARQ buffer size.

Wherein, the actions of the network device in the above steps S601 to S608 can be executed by the processor 501 in the network device 50 shown in FIG. 5 by calling the application program code stored in the memory 502 to instruct the network device to perform, in the above steps S601 to S608 The actions of the terminal device may be invoked by the processor 601 in the terminal device 60 shown in FIG. 5 to call the application program code stored in the memory 602 to instruct the network device to perform, which is not limited in this embodiment.

Or, taking the interaction between the network device 50 shown in FIG. 4 and any terminal device 60 as an example, as shown in FIG. 11, a method for data scheduling provided by an embodiment of the present application includes the following steps:

S1101-S1103. Steps S1101-S1103 are the same as steps S603-S605 in the embodiment shown in FIG. 6. For related descriptions, reference may be made to the embodiment shown in FIG. 6, which is not repeated here.

S1104. The network device uses the first valid subframe after the subframe n1 + k2 as a starting subframe, and sends TBs out of the N TBs except M TBs to the terminal device.

Where subframe n1 is the last subframe of the first physical downlink control channel candidate after carrying subframe n2 + k1, or subframe n1 is the sth physical downlink control channel candidate after carrying subframe n2 + k1 In the last subframe of, subframe n2 is the last subframe carrying ACKs of M TBs, k1 is 0 or a preset positive integer value, k2 is 0 or a preset positive integer value, and s is a preset positive integer value.

Optionally, in the embodiment of the present application, the network device uses the first valid subframe after the subframe n1 + k2 as the starting subframe, and sends the TB of the N TBs other than the M TBs to the terminal device. Including: according to the first DCI, the network device uses the first valid subframe after the subframe n1 + k2 as the starting subframe, and sends the TB of the N TBs other than the M TBs to the terminal device.

Optionally, k1 in the embodiment of the present application may be the ACK / NACK processing time and the conversion time from downlink to uplink. Exemplarily, k1 may be 0 or 1 or 7 or 8 or 11 or 12.

Optionally, k2 in the embodiment of the present application may be the processing time of DCI. Exemplarily, k2 may be 0 or 1 or 2 or 3 or 4.

Optionally, in the embodiment of the present application, the repetition level of the first physical downlink control channel candidate is the same as the repetition number of the first DCI; or, any physical downlink control among the first to s physical downlink control channel candidates The repetition level of the channel candidate is the same as the number of repetitions of the first DCI.

Exemplarily, taking the physical downlink control channel candidate as the NPDCCH candidate as an example, as shown in FIG. 12, assume that the position of the subframe n2 + k1 is located on a subframe of one or more subframes carrying NPDCCH candidate 1, R _max Set to 64, the repetition level of the NPDCCH candidate may be Rmax / 8 = 8, R _max / 4 = 16, R _max / 2 = 32, R _max = 64. Assuming that the number of repetitions of the first DCI is 8, and the repetition level of the first NPDCCH candidate after the subframe n2 + k1 is the same as the number of repetitions of the first DCI, the first NPDCCH candidate after the subframe n2 + k1 is the NPDCCH candidate 2. Accordingly, as shown in FIG. 12, the subframe n1 is the last subframe carrying NPDCCH candidate 2.

Or, exemplarily, taking the physical downlink control channel candidate as the NPDCCH candidate as an example, as shown in FIG. 13, suppose that the position of the subframe n2 + k1 is located on a certain subframe of one or more subframes carrying NPDCCH candidate 1, Assuming that R _max is 64, the repetition level of NPDCCH candidates may be R _max / 8 = 8, R _max / 4 = 16, R _max / 2 = 32, R _max = 64. Assuming that the number of repetitions of the first DCI is 16, and the repetition level of the first NPDCCH candidate after the subframe n2 + k1 is the same as the number of repetitions of the first DCI, the first NPDCCH candidate after the subframe n2 + k1 is the NPDCCH candidate 9. Correspondingly, as shown in FIG. 13, the subframe n1 is the last subframe carrying NPDCCH candidate 9.

Or, exemplarily, taking the physical downlink control channel candidate as the NPDCCH candidate as an example, as shown in FIG. 14, suppose that the position of the subframe n2 + k1 is located on a subframe of one or more subframes carrying NPDCCH candidate 1, Assuming that R _max is 64, the repetition level of NPDCCH candidates may be R _max / 8 = 8, R _max / 4 = 16, R _max / 2 = 32, R _max = 64. Assuming that the number of repetitions of the first DCI is 32, and the repetition level of the first NPDCCH candidate after the subframe n2 + k1 is the same as the number of repetitions of the first DCI, the first NPDCCH candidate after the subframe n2 + k1 is an NPDCCH candidate 13. Accordingly, as shown in FIG. 14, subframe n1 is the last subframe carrying NPDCCH candidate 13.

Or, exemplarily, taking the physical downlink control channel candidate as the NPDCCH candidate as an example, as shown in FIG. 14, suppose that the position of the subframe n2 + k1 is located on a subframe of one or more subframes carrying NPDCCH candidate 1, Assuming that Rmax is 64, the repetition level of the NPDCCH candidate may be R _max / 8 = 8, R _max / 4 = 16, R _max / 2 = 32, and R _max = 64. Assuming that the number of repetitions of the first DCI is 64, and the repetition level of the first NPDCCH candidate after the subframe n2 + k1 is the same as that of the first DCI, the first NPDCCH candidate after the subframe n2 + k1 is the next NPDCCH candidates 14 in the periodic NPDCCH search space. Correspondingly, the subframe n1 is the last subframe carrying the NPDCCH candidate 14 in the NPDCCH search space of the next cycle (not shown in FIG. 14).

Exemplarily, taking the physical downlink control channel candidate as the NPDCCH candidate as an example, as shown in FIG. 15, assume that the position of the subframe n2 + k1 is located on a subframe of one or more subframes carrying NPDCCH candidate 1, R _max Assuming 64, the repetition level of the NPDCCH candidates may be R _max / 8 = 8, R _max / 4 = 16, R _max / 2 = 32, R _max = 64. Assuming that the number of repetitions of the first DCI is 8, s = 3, and the repetition level of any physical downlink control channel candidate in the first to sth physical downlink control channel candidates is the same as the number of repetitions of the first DCI, then the subframe n2 The first NPDCCH candidate after + k1 is NPDCCH candidate 2, the second NPDCCH candidate after subframe n2 + k1 is NPDCCH candidate 3, and the third NPDCCH candidate after subframe n2 + k1 is NPDCCH candidate 4. Accordingly, as shown in FIG. 15, the subframe n1 is the last subframe carrying NPDCCH candidate 4.

S1105. If the subframe n1 is the last subframe carrying the first physical downlink control channel candidate after the subframe n2 + k1, the terminal device monitors the first physical downlink control channel candidate after the subframe n2 + k1. Or, subframe n1 is the last subframe carrying the sth physical downlink control channel candidate after subframe n2 + k1, and the terminal device monitors the first to s physical downlink control channel candidates after subframe n2 + k1 .

S1106. If the terminal device does not detect the second DCI on the physical downlink control channel candidate, the terminal device uses the first valid subframe after the subframe n1 + k2 as the starting subframe and receives N TBs from the network device In addition to M TB.

Wherein, the physical downlink control channel here includes the first physical downlink control channel candidate after the subframe n2 + k1 monitored by the terminal device; or, the physical downlink control channel here includes the subframe n2 + k1 monitored by the terminal device The 1st to sth physical downlink control channel candidates are described here, and will not be repeated below.

Exemplarily, taking the NB-IoT system as an example, if the terminal device type is category NB1, M = 1. Assuming that the first DCI is used to schedule 2 TBs, the numbers of the 2 TBs are # 1 and # 2, and A / N represents ACK / NACK feedback, and the corresponding downlink scheduling diagram may be as shown in FIG. The network device first sends the TB with the number # 1 to the terminal device according to the first DCI. The terminal device receives the TB with the number # 1 from the network device according to the first DCI. If the ACK / NACK feedback of the TB with the number # 1 is ACK, and after sending the ACK / NACK feedback of the TB of the TB to the network device, the terminal device monitors the first physical downlink control channel candidate after the subframe n2 + k1 , Or the first to sth physical downlink control channel candidates after monitoring subframe n2 + k1, and the second DCI is not monitored on the corresponding physical downlink control channel candidate, then the terminal device uses subframes according to the first DCI The first valid subframe after n1 + k2 is the starting subframe and the TB with the number # 2 is received from the network device.

Optionally, in the embodiment of the present application, the terminal device uses the first valid subframe after the subframe n1 + k2 as a starting subframe, and receives TBs other than M TBs out of N TBs from the network device. The method includes: according to the first DCI, the terminal device uses the first valid subframe after the subframe n1 + k2 as the starting subframe, and receives TBs out of the M N TBs out of the N TBs from the network device.

In the above steps S1103 to S1106, the terminal device sends M TB ACKs to the network device, and the network device receives M TB ACKs from the terminal device as an example. Optionally, in the embodiment of the present application, after the terminal device sends M TB ACKs to the network device, the network device may not detect the M TB ACKs, or the network device may also send one of the M TB ACKs Or multiple false detections are NACK. At this time, the network device needs to send the second DCI to the terminal device, and then the terminal device can listen to the second DCI within the physical downlink control channel candidate, and receive the retransmission of the TB according to the scheduling information of the second DCI. Optionally, it may also include receiving new transmissions of other TBs.

Or, optionally, in the embodiment of the present application, if the terminal device has at least one TB decoding error when demodulating and decoding M TBs, at this time, the terminal device sends M TB ACK / to the network device After the NACK, the network device needs to send the second DCI to the terminal device, and then the terminal device can listen to the second DCI within the physical downlink control channel candidate, and receive the TB retransmission according to the scheduling information of the second DCI. Optionally, it may also include receiving new transmissions of other TBs.

That is to say, in the embodiment of the present application, no matter whether the feedback of the M TBs is all ACK, or part of it is ACK, if the terminal device hears the second DCI within the above physical downlink control channel candidate, it needs The scheduling information receives the retransmission of TB. Optionally, it may also include receiving new transmissions of other TBs.

Exemplarily, taking the NB-IoT system as an example, if the terminal device type is category NB1, M = 1. Assuming that the first DCI is used to schedule 2 TBs, the numbers of the 2 TBs are # 1 and # 2, and A / N represents ACK / NACK feedback, and the corresponding schematic diagram of downlink scheduling may be as shown in FIG. 17. The network device first sends the TB with the number # 1 to the terminal device according to the first DCI. The terminal device receives the TB with the number # 1 from the network device according to the first DCI. If the ACK / NACK feedback of the TB with the number # 1 is NACK, and after sending the ACK / NACK feedback of the TB of the # 1 to the network device, the terminal device monitors the first physical downlink control channel candidate after the subframe n2 + k1 , Or the first to sth physical downlink control channel candidates after monitoring subframe n2 + k1, and the second DCI is monitored on the corresponding physical downlink control channel candidate, then the terminal device uses subframe n1 according to the second DCI The first valid subframe after + k2 is the starting subframe, and the TB with the number # 1 is received from the network device. Among them, TB numbered # 1 is retransmission.

Optionally, in the embodiment of the present application, if the terminal device has at least one TB decoding error when demodulating and decoding M TBs, at this time, the terminal device sends M TB ACK / NACK to the network device , If the network device misdetects that M TB ACKs are received, or, although the network device correctly detects M TB ACK / NACKs, the second DCI terminal device sent to the terminal device is within the physical downlink control channel candidate Not monitored, the terminal device will not process it at this time.

Optionally, in the embodiment of the present application, if the number of TBs other than M TBs (that is, N-M) is greater than M, multiple steps similar to steps S1103-S1106 need to be performed. For example, assuming that N = 4 and M = 1, the numbers of N TBs are # 0, # 1, # 2 and # 3, respectively. After the network device sends the TB numbered # 0 to the terminal device, if the terminal device decodes the TB numbered # 0 correctly, the terminal device sends an ACK of the TB numbered # 0 to the network device. After receiving the ACK of the TB with the number # 0 from the terminal device, the network device sends the TB with the number # 1 to the terminal device using the first valid subframe after the subframe n1 + k2 as the starting subframe. If the terminal device decodes the TB with the number # 1 correctly, the terminal device sends an ACK with the TB with the number # 1 to the network device. After receiving the ACK of the TB with the number # 1 from the terminal device, the network device sends the TB with the number # 2 to the terminal device using the first valid subframe after the subframe n1 + k2 as the starting subframe. If the terminal device decodes the TB with the number # 2 correctly, the terminal device sends an ACK with the TB with the number # 2 to the network device. After receiving the ACK of the TB with the number # 2 from the terminal device, the network device sends the TB with the number # 3 to the terminal device using the first valid subframe after the subframe n1 + k2 as the starting subframe. After the above four TBs are all sent, the network device may continue to send new DCI to the terminal device, and the new DCI is used to schedule other TBs, which is not specifically limited in this embodiment of the present application.

Wherein, the actions of the network device in the above steps S1101 to S1106 can be executed by the processor 501 in the network device 50 shown in FIG. 5 by calling the application program code stored in the memory 502 to instruct the network device to execute, in the above steps S1101 to S1106 The actions of the terminal device may be invoked by the processor 601 in the terminal device 60 shown in FIG. 5 to call the application program code stored in the memory 602 to instruct the network device to perform, which is not limited in this embodiment.

Or, taking the interaction between the network device 50 shown in FIG. 4 and any terminal device 60 as an example, as shown in FIG. 18, a method for data scheduling provided by an embodiment of the present application includes the following steps:

S1801: The network device sends the first DCI to the terminal device. Correspondingly, the terminal device receives the first DCI from the network device.

The first DCI is used to schedule N TBs, that is, the first DCI in the embodiment of the present application can schedule multiple TBs, and N is a positive integer greater than 1. In addition, the transmission block size of each TB of the N TBs is related to the total number of soft channel bits of the terminal device; or, the transmission block size of each TB of the N TBs is related to the maximum transmission block size supported by the terminal device; or , The number of subframes mapped by each TB of N TBs is related to the total number of soft channel bits of the terminal equipment; or, the number of subframes mapped by each TB of N TBs and the number of subframes mapped by each TB The maximum value is related; or, the number of resource units of each TB in N TBs is related to the total number of soft channel bits of the terminal equipment; or, the number of resource units of each TB in N TBs is the maximum transmission block supported by the terminal equipment Size related.

Optionally, in the embodiment of the present application, N may be independently indicated through a field in the DCI, or jointly indicated with other fields in the DCI, which is not specifically limited in the embodiment of the present application.

Optionally, in the embodiment of the present application, the transmission block size of each TB in N TBs is related to the total number of soft channel bits of the terminal device, including: the transmission block size of each TB in N TBs is the same, and each The size of a TB transmission block does not exceed N _soft / N, or R _m * N _soft / NN _CRC . Where N _soft is the total number of soft channel bits of the terminal device, R _m is the mother code rate, and N _CRC is the number of CRC bits.

Exemplarily, as shown in Table 1, for the terminal device of category NB1, N _soft is 2112; for the terminal device of category NB2, N _soft is 6400.

Optionally, in the embodiment of the present application, the transmission block size of each TB in N TBs is related to the maximum transmission block size supported by the terminal device, including: the transmission block size of each TB in N TBs is the same, and The transmission block size of each TB does not exceed TBS _max / N. Among them, TBS _max is the maximum transmission block size supported by the terminal device.

Exemplarily, as shown in Table 1, for terminal equipment of category NB1, TBS _max is 680; for terminal equipment of category NB2, TBS _max is 2536.

Optionally, in the embodiment of the present application, the number of subframes mapped to each TB in N TBs is related to the total number of soft channel bits of the terminal device, including: the number of subframes mapped to each TB in N TBs is the same, And the number of subframes mapped per TB does not exceed N _soft / (N * Q _m * N _RE ). Where N _soft is the total number of soft channel bits of the terminal device, Q _m is the modulation order, and N _RE is a resource element (resource element, which can be used for physical downlink shared channel transmission in a downlink physical resource block (PRB)). RE) number.

Optionally, in the embodiment of the present application, the number of subframes mapped by each TB in N TBs is related to the maximum number of subframes mapable by each TB, including: the number of subframes mapped by each TB in N TBs The number of subframes is the same, and the number of subframes mapped per TB does not exceed N _{sf, max} / N. Where N _{sf, max} is the maximum number of subframes that can be mapped per TB.

Exemplarily, for the NB-IoT system, N _{sf, max} is 10.

Optionally, in the embodiment of the present application, the number of resource units of each TB in N TBs is related to the total number of soft channel bits of the terminal device, including: the number of resource units of each TB in N TBs is the same, and each The number of resource units per TB does not exceed N _soft / N, or R _m * N _soft / NN _CRC . Where N _soft is the total number of soft channel bits of the terminal device, R _m is the mother code rate, and N _CRC is the number of CRC bits in the cyclic redundancy check.

Optionally, in the embodiment of the present application, the number of resource units of each TB in N TBs is related to the maximum transmission block size supported by the terminal device, including: the number of resource units of each TB in N TBs is the same, and The number of resource units per TB does not exceed TBS _max / N. Among them, TBS _max is the maximum transmission block size supported by the terminal device.

S1802. The network device sends N TBs to the terminal device. Correspondingly, the terminal device receives N TBs from the network device according to the first DCI.

Optionally, in the embodiment of the present application, the network device sending N TBs to the terminal device may include: the network device sending N TBs to the terminal device according to the first DCI.

In addition, the terminal device according to the first DCI receives N TB processing mechanism can refer to the existing implementation, such as after the N TB demodulation and decoding, send N TB ACK / NACK feedback to the network device, etc., I will not repeat them here. In addition, optionally, the N TB ACK / NACK feedback mode can refer to the above M TB ACK / NACK feedback modes, which will not be repeated here.

In the embodiment of the present application, for multiple TBs scheduled by the first DCI, the size of the transmission block of each TB in the multiple TBs is related to the total number of soft channel bits of the terminal device; or, the number of each TB in the multiple TBs The transport block size is related to the maximum transport block size supported by the terminal device; or, the number of subframes mapped by each TB in multiple TBs is related to the total number of soft channel bits of the terminal device; or, each TB mapped in multiple TBs The number of subframes is related to the maximum number of subframes that can be mapped to each TB; or, the number of resource units per TB in multiple TBs is related to the total number of soft channel bits of the terminal device 60; or, multiple TBs The number of resource units per TB is related to the maximum transmission block size supported by the terminal device 60. Therefore, based on the data scheduling method provided in the embodiment of the present application, it can be ensured that the HARQ buffer occupied by multiple TBs does not exceed the HARQ buffer size, so that a DCI can schedule more TBs without increasing the HARQ buffer size .

Wherein, the actions of the network device in the above steps S1801 to S1802 can be executed by the processor 501 in the network device 50 shown in FIG. 5 by calling the application program code stored in the memory 502 to instruct the network device to execute, in the above steps S1801 to S1802 The actions of the terminal device may be invoked by the processor 601 in the terminal device 60 shown in FIG. 5 to call the application program code stored in the memory 602 to instruct the network device to perform, which is not limited in this embodiment.

Optionally, in the above embodiments of the present application, N DCs or M TBs scheduled by one DCI may belong to the same HARQ process, or may belong to different HARQ processes. For example, in FIG. 8 or FIG. 10, the TB numbered # 1 and the TB numbered # 2 belong to different HARQ processes. Among them, the TB with the number # 1 may belong to the HARQ process 0, and the TB with the number # 2 may belong to the HARQ process 1, which will be described here in a unified manner and will not be described in detail below.

The above mainly introduces the solutions provided by the embodiments of the present application from the perspective of interaction between various network elements. It can be understood that, in order to realize the above-mentioned functions, the above network device or terminal device includes a hardware structure and / or a software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the exemplary units and algorithm steps described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed by hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

In the embodiments of the present application, the network device or the terminal device may be divided into function modules according to the above method examples. For example, each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above integrated modules may be implemented in the form of hardware or software function modules. It should be noted that the division of the modules in the embodiments of the present application is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner.

For example, in a case where each functional module is divided in an integrated manner, FIG. 19 shows a schematic structural diagram of a terminal device 190. The terminal device 190 includes a receiving module 1901 and a sending module 1902. The receiving module 1901 is configured to receive a first DCI from a network device, and the first DCI is used to schedule N TBs, where N is a positive integer greater than 1. The receiving module 1901 is further configured to receive M TBs out of N TBs from the network device according to the first DCI, where M is a positive integer less than N, and the value of M is at least related to one of the following: the category of the terminal device 190 ; The coverage enhancement mode of the terminal device 190; or, the number of HARQ processes used by the terminal device 190. The sending module 1902 is used to send M TB ACKs to the network device. The receiving module 1901 is further configured to receive TBs other than M TBs out of N TBs from the network device according to the first DCI.

In a possible implementation, the receiving module 1901 is configured to receive TBs other than M TBs out of N TBs from the network device according to the first DCI, including: monitoring the second DCI within the first time unit; if The second DCI is not monitored within the first time unit, and TBs other than M TBs out of N TBs are received from the network device according to the first DCI.

Optionally, the first duration unit is equal to k second duration units, and the second duration unit includes a physical downlink control channel period, subframe, radio frame, system frame, super frame, or ms, and k is a positive integer.

Optionally, as shown in FIG. 19, the terminal device 190 further includes a processing module 1903. The receiving module 1901 is also used to receive configuration information from a network device. The processing module 1903 is also used to determine the first duration unit according to the configuration information.

Optionally, the configuration information is used to indicate the number k of the second duration unit, where the second duration unit includes a physical downlink control channel period, subframe, radio frame, system frame, superframe, or ms, and k is a positive integer.

In another possible implementation, the receiving module 1901 is configured to receive TBs out of the N TBs except M TBs from the network device according to the first DCI, including: monitoring the first physical downlink after monitoring subframe n2 + k1 Control channel candidate, or the 1st to sth physical downlink control channel candidate after monitoring subframe n2 + k1, subframe n2 is the last subframe carrying M TB ACKs, k1 is 0 or preset positive Integer value, s is a preset positive integer value; if the second DCI is not monitored on the physical downlink control channel candidate, TBs other than M TBs out of N TBs are received from the network device according to the first DCI.

Optionally, the repetition level of the first physical downlink control channel candidate is the same as the repetition number of the first DCI. Or, the repetition level of any physical downlink control channel candidate in the first to sth physical downlink control channel candidates is the same as the number of repetitions of the first DCI.

Optionally, the receiving module 1901 is configured to receive TBs other than M TBs out of N TBs from the network device according to the first DCI, including: according to the first DCI, the first one after the subframe n1 + k2 The effective subframe is the starting subframe, and TBs other than M TB out of N TBs are received from the network device, where subframe n1 is the last subframe carrying the first physical downlink control channel candidate, or, the subframe Frame n1 is the last subframe carrying the sth physical downlink control channel candidate, and k2 is 0 or a preset positive integer value.

Wherein, all relevant content of each step involved in the above method embodiments can be referred to the function description of the corresponding function module, which will not be repeated here.

In this embodiment, the terminal device 190 is presented in the form of dividing each functional module in an integrated manner. The "module" herein may refer to a specific ASIC, circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art may think that the terminal device 190 may take the form of the terminal device 60 shown in FIG. 5.

For example, the processor 601 in the terminal device 60 shown in FIG. 5 may call the computer stored in the memory 602 to execute instructions, so that the terminal device 60 executes the steps performed by the terminal device in the data scheduling method in the foregoing method embodiment.

Specifically, the functions / implementation processes of the receiving module 1901, the sending module 1902, and the processing module 1903 in FIG. 19 can be implemented by the processor 601 in the terminal device 60 shown in FIG. 5 calling the computer execution instructions stored in the memory 602. Alternatively, the function / implementation process of the processing module 1903 in FIG. 19 can be implemented by the processor 601 in the terminal device 60 shown in FIG. 5 calling the computer execution instructions stored in the memory 602, and the receiving module 1901 in FIG. 19 and sending The function / implementation process of the module 1902 can be realized by the transceiver 603 in the terminal device 60 shown in FIG. 5.

Since the terminal device provided in this embodiment can perform the steps performed by the terminal device in the data scheduling method in the above method embodiments, the technical effects that can be obtained can refer to the above method embodiments, and details are not described herein again.

Optionally, an embodiment of the present application further provides a chip system, the chip system includes a processor, which is used to support the terminal device to implement the steps performed by the terminal device in the data scheduling method in the foregoing method embodiment, for example, according to the configuration The information determines the number k of the second duration unit. In a possible design, the chip system also includes a memory. The memory is used to store necessary program instructions and data of the terminal device. Of course, the memory may not be in the chip system. The chip system may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

Or, for example, in a case where each functional module is divided in an integrated manner, FIG. 20 shows a schematic structural diagram of a network device 200. The network device 200 includes a sending module 2002 and a receiving module 2001. The sending module 2002 is used to send a first DCI to the terminal device, and the first DCI is used to schedule N TBs, where N is a positive integer greater than 1. The sending module 2002 is also used to send M TB out of N TBs to the terminal device, where M is a positive integer less than N, and the value of M is at least related to one of the following: the type of terminal device; the coverage of the terminal device Enhanced mode; or, the number of HARQ processes used by the terminal device. The receiving module 2001 is used to receive ACKs of M terabytes from the terminal device. The sending module 2002 is also used to send TBs out of M TBs out of N TBs to the terminal device.

In a possible implementation manner, the sending module 2002 is used to send TBs out of the N TBs out of the M TBs to the terminal device, including: to send the N TBs to the terminal device after the arrival of the first time unit TB other than M TB.

Optionally, the first time unit is equal to k second time units, and the second time unit includes a physical downlink control channel period, subframe, radio frame, system frame, super frame, or ms, and k is a positive integer.

Optionally, the sending module 2002 is also used to send configuration information to the terminal device, where the configuration information is used to determine the first time unit.

In another possible implementation, the sending module 2002 is used to send TBs out of the N TBs other than the M TBs to the terminal device, including: the first valid subframe after the subframe n1 + k2 is Starting subframe, sending TB out of N TB except M TB to the terminal device, where subframe n1 is the last subframe of the first physical downlink control channel candidate after carrying subframe n2 + k1, Alternatively, subframe n1 is the last subframe of the sth physical downlink control channel candidate after carrying subframe n2 + k1, subframe n2 is the last subframe carrying M TB ACKs, and k1 is 0 or preset Positive integer, k2 is 0 or preset positive integer value, s is preset positive integer value.

Optionally, the repetition level of the first physical downlink control channel candidate is the same as the number of repetitions of the first DCI; or, the repetition level of any physical downlink control channel candidate from the first to the sth physical downlink control channel candidate is The number of repetitions of the first DCI is the same.

In this embodiment, the network device 200 is presented in the form of dividing each functional module in an integrated manner. The "module" herein may refer to a specific ASIC, circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art may think that the network device 200 may take the form of the network device 50 shown in FIG. 5.

For example, the processor 501 in the network device 50 shown in FIG. 5 may call the computer stored in the memory 502 to execute instructions, so that the network device 50 executes the steps performed by the network device in the data scheduling method in the foregoing method embodiment.

Specifically, the functions / implementation processes of the receiving module 2001 and the sending module 2002 in FIG. 20 can be implemented by the processor 501 in the network device 50 shown in FIG. 5 calling the computer execution instructions stored in the memory 502. Alternatively, the functions / implementation processes of the receiving module 2001 and the sending module 2002 in FIG. 20 may be implemented by the transceiver 503 in the network device 50 shown in FIG. 5.

Since the network device provided in this embodiment can perform the steps performed by the network device in the data scheduling method in the foregoing method embodiments, the technical effects that can be obtained can refer to the foregoing method embodiments, and details are not described herein again.

Optionally, an embodiment of the present application further provides a chip system. The chip system includes a processor for supporting a network device to implement the steps performed by the network device in the data scheduling method in the foregoing method embodiment, for example, determining N M TB out of TB. In a possible design, the chip system also includes a memory. The memory is used to store necessary program instructions and data of network equipment. Of course, the memory may not be in the chip system. The chip system may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

Or, for example, in a case where each functional module is divided in an integrated manner, FIG. 21 shows a schematic structural diagram of a terminal device 210. The terminal device 210 includes a first receiving module 2101 and a second receiving module 2102. Among them, the first receiving module 2101 is used to receive a first DCI from a network device, the first DCI is used to schedule N TBs, the transmission block size of each TB of the N TBs is related to the total number of soft channel bits of the terminal device ; Or, the transmission block size of each TB of the N TBs is related to the maximum transmission block size supported by the terminal device; or, the number of subframes mapped by each TB of the N TBs is related to the total number of soft channel bits of the terminal device ; Or, the number of subframes mapped to each TB in N TBs is related to the maximum number of subframes that can be mapped to each TB, the number of resource units per TB in N TBs and the soft channel bits of the terminal equipment The total number is related; or, the number of resource units of each TB in N TBs is related to the maximum transmission block size supported by the terminal device, and N is a positive integer greater than 1. The second receiving module 2102 is configured to receive N TBs from the network device according to the first DCI.

In this embodiment, the terminal device 210 is presented in the form of dividing each functional module in an integrated manner. The "module" herein may refer to a specific ASIC, circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art may think that the terminal device 210 may take the form of the terminal device 60 shown in FIG. 5.

Specifically, the functions / implementation processes of the first receiving module 2101 and the second receiving module 2102 in FIG. 21 can be implemented by calling the computer execution instructions stored in the memory 602 by the processor 601 in the terminal device 60 shown in FIG. 5. Alternatively, the functions / implementation processes of the first receiving module 2101 and the second receiving module 2102 in FIG. 21 may be implemented by the transceiver 603 in the terminal device 60 shown in FIG. 5.

Optionally, an embodiment of the present application further provides a chip system, the chip system includes a processor, which is used to support the terminal device to implement the steps performed by the terminal device in the data scheduling method in the foregoing method embodiment, for example, according to the first One DCI receives N TBs from the network equipment. In a possible design, the chip system also includes a memory. The memory is used to store necessary program instructions and data of the terminal device. Of course, the memory may not be in the chip system. The chip system may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

Or, for example, in a case where each functional module is divided in an integrated manner, FIG. 22 shows a schematic structural diagram of a network device 220. The network device 220 includes a first sending module 2201 and a second sending module 2202.

Among them, the first sending module 2201 is used to send the first DCI to the terminal device, and the first DCI is used to schedule N TBs, and the size of the transmission block of each TB in the N TBs is related to the total number of soft channel bits of the terminal device; Or, the transmission block size of each TB of the N TBs is related to the maximum transmission block size supported by the terminal device; or, the number of subframes mapped by each TB of the N TBs is related to the total number of soft channel bits of the terminal device; Or, the number of subframes mapped to each TB in N TBs is related to the maximum number of subframes that can be mapped to each TB; or, the number of resource units per TB in N TBs and the soft channel of the terminal device The total number of bits is related; or, the number of resource units of each TB in N TBs is related to the maximum transmission block size supported by the terminal device, and N is a positive integer greater than 1. The second sending module 2202 is configured to send N TBs to the terminal device.

In this embodiment, the network device 220 is presented in the form of dividing each functional module in an integrated manner. The "module" herein may refer to a specific ASIC, circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above functions. In a simple embodiment, those skilled in the art may think that the network device 220 may take the form of the network device 50 shown in FIG. 5.

Specifically, the functions / implementation processes of the first sending module 2201 and the second sending module 2202 in FIG. 22 can be implemented by the processor 501 in the network device 50 shown in FIG. 5 calling the computer execution instruction stored in the memory 502. Alternatively, the functions / implementation processes of the first sending module 2201 and the second sending module 2202 in FIG. 22 may be implemented by the transceiver 503 in the network device 50 shown in FIG. 5.

Optionally, an embodiment of the present application further provides a chip system. The chip system includes a processor for supporting a network device to implement the steps performed by the network device in the method for data scheduling in the foregoing method embodiment, such as acquiring N TB. In a possible design, the chip system also includes a memory. The memory is used to store necessary program instructions and data of network equipment. Of course, the memory may not be in the chip system. The chip system may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers and data centers that can be integrated with the medium. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

Although this application has been described in conjunction with various embodiments herein, in the process of implementing the claimed application, those skilled in the art can understand and understand by looking at the drawings, the disclosure, and the appended claims Other changes to the disclosed embodiments are implemented. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit may fulfill several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to cover any and all modifications, changes, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A data scheduling method, characterized in that the method includes:

The terminal device receives first downlink control information DCI from the network device, where the first DCI is used to schedule N transport blocks TB, where N is a positive integer greater than 1;

The terminal device receives M TB of the N TBs from the network device according to the first DCI, where M is a positive integer less than N, and the value of M is at least related to one of the following:

The category of the terminal equipment;

Coverage enhancement mode of the terminal device; or,

The number of HARQ processes of the hybrid automatic retransmission request used by the terminal device;

The terminal device sends an acknowledgement ACK of the M TBs to the network device;

The terminal device receives TBs other than the M TBs out of the N TBs from the network device according to the first DCI.
The method according to claim 1, wherein the terminal device receiving, from the network device according to the first DCI, TBs other than the M TBs out of the N TBs includes:

The terminal device monitors the second DCI within the first time unit;

If the terminal device does not listen to the second DCI within the first time unit, the terminal device receives the N TBs from the network device according to the first DCI except the M TBs TB.
The method according to claim 2, wherein the first duration unit is equal to k second duration units, and the second duration unit includes a physical downlink control channel period, subframe, radio frame, system frame, super Frame, or ms, k is a positive integer.
The method according to claim 2 or 3, wherein the method further comprises:

The terminal device receives configuration information from the network device;

The terminal device determines the first duration unit according to the configuration information.
The method according to claim 4, wherein the configuration information is used to indicate the number k of the second duration unit, the second duration unit including a physical downlink control channel period, subframe, radio frame, system frame, Superframe, or ms, k is a positive integer.
The method according to claim 1, wherein the terminal device receiving, from the network device according to the first DCI, TBs other than the M TBs out of the N TBs includes:

The terminal device monitors the first physical downlink control channel candidate after the subframe n2 + k1, or the terminal device monitors the first to s physical downlink control channel candidates after the subframe n2 + k1, subframe n2 is the last subframe carrying the M TB ACKs, k1 is 0 or a preset positive integer value, and s is a preset positive integer value;

If the terminal device does not hear a second DCI on the physical downlink control channel candidate, the terminal device receives the N TBs from the network device according to the first DCI except the M TBs TB outside.
The method according to claim 6, wherein the repetition level of the first physical downlink control channel candidate is the same as the number of repetitions of the first DCI;

Or, the repetition level of any physical downlink control channel candidate among the first to sth physical downlink control channel candidates is the same as the number of repetitions of the first DCI.
The method according to claim 6 or 7, wherein the terminal device receiving, from the network device according to the first DCI, TBs other than the M TBs out of the N TBs includes:

According to the first DCI, the terminal device uses the first valid subframe after the subframe n1 + k2 as the starting subframe, and receives the M TBs out of the N TBs received from the network device An external TB, where the subframe n1 is the last subframe carrying the first physical downlink control channel candidate, or the subframe n1 is the last carrying the sth physical downlink control channel candidate For a subframe, k2 is 0 or a preset positive integer value.
A data scheduling method, characterized in that the method includes:

The network device sends first downlink control information DCI to the terminal device, where the first DCI is used to schedule N transport blocks TB, where N is a positive integer greater than 1;

The network device sends M TBs of the N TBs to the terminal device, where M is a positive integer less than N, and the value of M is at least related to one of the following:

The category of the terminal equipment;

Coverage enhancement mode of the terminal device; or

The number of HARQ processes of the hybrid automatic retransmission request used by the terminal device;

The network device receives the M TB positive response ACK from the terminal device;

The network device sends TBs out of the M TBs out of the N TBs to the terminal device.
The method according to claim 9, wherein the sending, by the network device, the TB of the N TBs other than the M TBs to the terminal device includes:

After the first time unit arrives, the network device sends TBs of the N TBs other than the M TBs to the terminal device.
The method according to claim 10, wherein the first time unit is equal to k second time units, and the second time unit includes a physical downlink control channel period, a subframe, a radio frame, a system frame, a superframe Frame, or ms, k is a positive integer.
The method according to claim 10 or 11, wherein the method further comprises:

The network device sends configuration information to the terminal device, where the configuration information is used to determine the first time unit.
The method according to claim 9, wherein the sending, by the network device, the TB of the N TBs other than the M TBs to the terminal device includes:

The network device uses the first valid subframe after the subframe n1 + k2 as the starting subframe, and sends the terminal device TBs other than the M TBs out of the N TBs, where The subframe n1 is the last subframe of the first physical downlink control channel candidate after carrying subframe n2 + k1, or the subframe n1 is the sth physical downlink control channel after carrying subframe n + k1 The last candidate subframe, subframe n2 is the last subframe carrying the M TB ACKs, k1 is 0 or a preset positive integer value, k2 is 0 or a preset positive integer value, and s is a preset positive Integer value.
The method according to claim 13, wherein the repetition level of the first physical downlink control channel candidate is the same as the number of repetitions of the first DCI;

Or, the repetition level of any physical downlink control channel candidate among the first to sth physical downlink control channel candidates is the same as the number of repetitions of the first DCI.
A terminal device, characterized in that the terminal device includes: a receiving module and a sending module;

The receiving module is configured to receive first downlink control information DCI from a network device, and the first DCI is used to schedule N transport blocks TB, where N is a positive integer greater than 1;

The receiving module is further configured to receive M TBs of the N TBs from the network device according to the first DCI, where M is a positive integer less than N, and the value of M is at least one of the following related:

The category of the terminal equipment;

Coverage enhancement mode of the terminal device; or,

The number of HARQ processes of the hybrid automatic retransmission request used by the terminal device;

The sending module is configured to send a positive response ACK of the M TBs to the network device;

The receiving module is further configured to receive, from the network device, TBs other than the M TBs from the N TBs according to the first DCI.
The terminal device according to claim 15, wherein the receiving module is configured to receive TBs other than the M TBs out of the N TBs from the network device according to the first DCI, including :

Used to monitor the second DCI within the first time unit; if the second DCI is not monitored within the first time unit, divide the N TB from the network device according to the first DCI TB other than M TB.
The terminal device according to claim 16, wherein the first duration unit is equal to k second duration units, and the second duration unit includes a physical downlink control channel period, subframe, radio frame, system frame, Superframe, or ms, k is a positive integer.
The terminal device according to claim 16 or 17, wherein the terminal device further comprises a processing module;

The receiving module is also used to receive configuration information from the network device;

The processing module is further configured to determine the first duration unit according to the configuration information.
The method according to claim 18, wherein the configuration information is used to indicate the number k of the second duration unit, the second duration unit including a physical downlink control channel period, subframe, radio frame, system frame, Superframe, or ms, k is a positive integer.
The terminal device according to claim 15, wherein the receiving module is configured to receive TBs other than the M TBs out of the N TBs from the network device according to the first DCI, including :

The first physical downlink control channel candidate after monitoring subframe n2 + k1, or the first to sth physical downlink control channel candidates after monitoring subframe n2 + k1, subframe n2 is carrying the M TBs In the last subframe of ACK, k1 is 0 or a preset positive integer value, and s is a preset positive integer value; if a second DCI is not heard on the physical downlink control channel candidate, according to the first DCI The network device receives TBs other than the M TBs out of the N TBs.
The terminal device according to claim 20, wherein the repetition level of the first physical downlink control channel candidate is the same as the repetition number of the first DCI;

Or, the repetition level of any physical downlink control channel candidate among the first to sth physical downlink control channel candidates is the same as the number of repetitions of the first DCI.
The terminal device according to claim 20 or 21, wherein the receiving module is configured to receive, from the network device, TBs other than the M TBs out of the N TBs according to the first DCI ,include:

For receiving, from the network device, the first effective subframe after the subframe n1 + k2 as the starting subframe according to the first DCI, except for the M TBs TB, wherein the subframe n1 is the last subframe carrying the first physical downlink control channel candidate, or the subframe n1 is the last subframe carrying the sth physical downlink control channel candidate Frame, k2 is 0 or preset positive integer value.
A network device, characterized in that the network device includes: a sending module and a receiving module;

The sending module is configured to send first downlink control information DCI to the terminal device, where the first DCI is used to schedule N transmission blocks TB, where N is a positive integer greater than 1;

The sending module is further configured to send M TBs of the N TBs to the terminal device, where M is a positive integer less than N, and the value of M is at least related to one of the following:

The category of the terminal equipment;

Coverage enhancement mode of the terminal device; or,

The number of HARQ processes of the hybrid automatic retransmission request used by the terminal device;

The receiving module is configured to receive the positive response ACK of the M TBs from the terminal device;

The sending module is further configured to send TBs out of the M TBs out of the N TBs to the terminal device.
The network device according to claim 23, wherein the sending module is configured to send the TB of the N TBs other than the M TBs to the terminal device, including:

It is used for sending TBs out of the M TBs out of the N TBs to the terminal device after the arrival of the first time unit.
The network device according to claim 24, wherein the first time unit is equal to k second time units, and the second time unit includes a physical downlink control channel period, subframe, radio frame, and system frame. Superframe, or ms, k is a positive integer.
The network device according to claim 24 or 25, characterized in that

The sending module is further configured to send configuration information to the terminal device, where the configuration information is used to determine the first time unit.
The network device according to claim 23, wherein the sending module is configured to send the TB of the N TBs other than the M TBs to the terminal device, including:

Used to start the first valid subframe after the subframe n1 + k2 as the starting subframe, and send TBs of the N TBs other than the M TBs to the terminal device, where the sub Frame n1 is the last subframe of the first physical downlink control channel candidate after carrying subframe n2 + k1, or the subframe n1 is the sth physical downlink control channel candidate after carrying subframe n2 + k1 The last subframe, subframe n2 is the last subframe carrying the M TB ACKs, k1 is 0 or a preset positive integer, k2 is 0 or a preset positive integer value, and s is a preset positive integer value.
The network device according to claim 27, wherein the repetition level of the first physical downlink control channel candidate is the same as the number of repetitions of the first DCI;

Or, the repetition level of any physical downlink control channel candidate among the first to sth physical downlink control channel candidates is the same as the number of repetitions of the first DCI.
A communication device, characterized by comprising: a processor and a memory;

The memory is used to store computer-executed instructions, and when the processor executes the computer-executed instructions, so that the communication device executes the method according to any one of claims 1-14.
A computer-readable storage medium, characterized by comprising instructions which, when run on a computer, cause the computer to perform the method according to any one of claims 1-14.