CN109478958B - Data transmission method, equipment and system - Google Patents

Abstract

Embodiments of the present invention provide a data transmission method, device, and system, which relate to the field of communication technologies to solve the problem that when a base station receives a HARQ feedback message, all HARQ processes are used and cannot be scheduled in time, resulting in waste of resources and system performance. loss problem. The method includes: the base station sends a data packet to the user equipment UE through the first transport block of the first HARQ process, and receives the HARQ feedback message returned by the UE. If the base station receives the HARQ feedback message, all HARQ processes supported by the base station have been used. , the base station sends the data packet to the UE through the second transport block of the first HARQ process according to the HARQ feedback message.

Description

A data transmission method, device and system

technical field

The present invention relates to the field of communication technologies, and in particular, to a data transmission method, device and system.

Background technique

The Long Term Evolution (LTE) network supports the Hybrid Automatic Repeat Request (HARQ) function. In the LTE TDD (Time Division Duplex, TDD) system, N-channel parallel HARQ processes are usually used to access the physical layer or media. The transport block is sent and retransmitted between peer entities in the control (Media Access Control, MAC) layer, so as to improve the throughput while ensuring the reliability of successful transmission of the transport block.

In the LTE TDD system, the number of downlink HARQ processes supported by different uplink and downlink ratios is different. For example, the number of downlink HARQ processes supported by uplink and downlink ratio mode 0 (the number of HARQ processes that can be used) is 4. The number of downlink HARQ processes supported in row matching mode 2 is 10. For each HARQ process, the base station notifies the user equipment (User Uniqupment, UE) of the scheduling information related to the HARQ process through downlink control information (Downlink Control Information, DCI), and uses the scheduling method corresponding to the HARQ process (such as : double-codeword scheduling or single-codeword scheduling) sends a data packet to the UE, and the UE processes the received data packet sent by the base station according to the scheduling information related to the HARQ process in the DCI, and sends the HARQ to the base station according to the processing result. Feedback message, the HARQ feedback message includes: Negative Acknowledgement (NACK) message or Acknowledgment (ACK) message, so that after receiving the HARQ feedback message, the base station can pass the available (ie: not used at the current moment) The HARQ process performs new packet transmission, or uses the same HARQ process as before for retransmission processing.

However, in practical applications, due to the limitation of HARQ feedback timing, it is easy to have that when the base station receives the HARQ feedback message sent by the UE, the HARQ process has been used up, and the HARQ process cannot be scheduled to transmit data packets in time. When a HARQ process is released at a time, the newly transmitted data packets of the released HARQ process can be scheduled, which seriously affects the performance of the network system and the user experience rate.

For example: Figure 1 is the HARQ scheduling sequence diagram in uplink and downlink configuration mode 2, wherein the number of available HARQ processes in uplink and downlink configuration mode 2 is 10. At this time, as shown in Figure 1, radio frame #0 Subframe #9, radio frame #1, subframe #0, radio frame #1, subframe #1, radio frame #1, and subframe #3 use 4 HARQ processes, and the user equipment reports this in radio frame #1 and subframe #7. HARQ feedback results of 4 frames. However, due to air interface delay, L1 processing delay, inter-board transmission delay, etc., the base station may not receive the HARQ feedback result until subframe #1 of radio frame #2 (NACK1 is used to indicate the HARQ of the four frames in the figure). feedback). Radio frame #1 subframe #4, radio frame #1 subframe #5, radio frame #1 subframe #6, radio frame #1 subframe #8 use another 4 HARQ processes, the user equipment in radio frame #2 Subframe #2 reports the HARQ feedback results of the four frames. However, L2 at the base station side may not receive the HARQ feedback result until subframe #6 of radio frame #2 (NACK2 in the figure represents the HARQ feedback result of the four frames). Up to radio frame #1 subframe #9, 8 HARQ processes have been used, radio frame #1 subframe #9 uses the ninth HARQ process, radio frame #2 subframe #0 uses the tenth HARQ process, since Therefore, all 10 available HARQ processes are used up, and the HARQ feedback result of the HARQ process of the previously scheduled subframe has not been returned, which will cause the radio frame #2 subframe #1 to be unscheduled because all 10 HARQ processes are used. , resulting in waste of resources and loss of system performance.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a data transmission method, device, and system to solve the problem of resource waste and system performance loss caused by exhausted HARQ processes when a base station receives a HARQ feedback message.

To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a data transmission method, the method is performed by a base station, and the method may include:

sending a data packet to the user equipment UE through the first transport block of the first HARQ process;

When the base station receives the HARQ feedback message returned by the UE, if all the HARQ processes supported by the base station have been used, the base station sends a data packet to the UE through the second transport block of the first HARQ process according to the HARQ feedback message.

For example, if the maximum number of HARQ processes that the base station can support is M, the M HARQ processes are one-to-one with M different HARQ process IDs. If all HARQ processes are used, the base station sends a data packet to the UE through the second transport block in the first HARQ.

That is, in this application, data packets are sent through different transport blocks in the HARQ process, which is equivalent to identifying a HARQ process by means of the HARQ process number and different transport blocks in the HARQ process. The process is divided into multiple HARQ processes, so as to expand the used HARQ processes. In this way, when the base station receives the HARQ feedback message, when all the HARQ processes are used, another unused transport block in the HARQ process can be used. It can send data packets in time, so that the data packets can be scheduled in time, avoiding the problem of resource waste and overall performance loss.

Optionally, in an implementation manner of the first aspect, the base station may indicate the scheduling information related to the HARQ process through the downlink control message DCI, so that the UE determines according to the scheduling information that the data packet sent this time is in the HARQ process. Which transport block is used, and what is the modulation and coding scheme, redundancy version information and new data indication adopted by the transport block, the specific implementation is as follows:

Before the base station sends a data packet to the UE through the first transport block of the first HARQ process, it sends to the UE through downlink control information DCI including: the process number of the first HARQ process, the identification information of the first transport block of the first HARQ process, and the first scheduling information of the first HARQ process of the control information of the first transport block of the first HARQ process, so that the UE receives the data packet from the first transport block of the first HARQ process according to the first scheduling information, and determines that the received The control information of the first transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information.

Similarly, before the base station sends the data packet to the UE through the second transport block of the first HARQ process, it sends the data packet to the UE through the downlink control information DCI including: the process ID of the first HARQ process, the second transport block of the first HARQ process. the identification information, and the second scheduling information of the first HARQ process of the control information of the second transport block of the first HARQ process, so that the UE receives the data packet from the second transport block of the first HARQ process according to the second scheduling information, and The condition of the received data packet is determined; the control information of the second transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information.

In this way, the scheduling message related to the HARQ process can be sent to the UE in advance, so that the UE can know on which transport block of which HARQ process the base station sends the data packet, so that the UE can receive the data packet and demodulate the data packet.

Optionally, in another implementation manner of the first aspect, when the base station sends a data packet to the UE through the first transport block of the first HARQ process, the second transport block of the first HARQ process does not is used, which is specifically embodied as: the first scheduling information does not include the control information of the second transport block, or the first scheduling information includes the control information of the second transport block, the control information of the second transport block The information is used to indicate that the second transport block is not used for transmitting data packets.

Similarly, when the base station sends the second scheduling information to the UE through the downlink control information DCI, the second scheduling information does not include the control information of the first transport block, or the second scheduling information includes the first transmission block. The control information of the transport block, but the control information of the first transport block is used to indicate that the first transport block is not used for transmitting data packets.

Specifically, the scheduling information of a single transport block may be indicated respectively by using the DCI format 2/2A/2B/2C/2D for indicating the double-codeword scheduling information.

In a second aspect, an embodiment of the present invention provides a data transmission method, which is performed by a user equipment UE, and the method may include:

receiving the data packet of the first transport block of the first HARQ process sent by the base station;

determining the received data packets sent by the base station through the first transport block of the first HARQ process, and returning a HARQ feedback message to the base station;

If the base station receives the HARQ feedback message and all the HARQ processes supported by the base station have been used, the UE receives the base station and sends a data packet to the UE through the second transport block of the first HARQ process according to the HARQ feedback message.

In this way, when the base station receives the HARQ feedback message and all the HARQ processes are used, the data packets can be sent in time through another transport block in the HARQ process, so that the data packets can be scheduled in time, avoiding resource waste and overall performance loss. The problem.

In an implementation manner of the second aspect, before the UE receives the data packet sent by the base station and passes through the first transport block of the first HARQ process, receiving the data packet sent by the base station to the UE through downlink control information DCI includes: the first The process ID of the HARQ process, the identification information of the first transport block of the first HARQ process, and the first scheduling information of the first HARQ process in the control information of the first transport block of the first HARQ process; The control information of the first transport block includes: scheduling coding scheme, redundancy version number and new data packet indication information.

Correspondingly, the UE may receive a data packet from the first transport block of the first HARQ process according to the first scheduling information, and determine the status of the received data packet.

Similarly, in yet another implementation manner of the second aspect, before the UE receives the data packet sent by the base station that passes through the second transport block of the first HARQ process, the receiving base station sends the data packet sent by the base station to the UE through the downlink control information DCI, including: Describe the process ID of the first HARQ process, the identification information of the second transport block of the first HARQ process, and the control information of the second transport block of the first HARQ process. The second scheduling information of the first HARQ process; the first HARQ process The control information of the second transport block of the HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information.

Correspondingly, the UE may receive data packets from the second transport block of the first HARQ process according to the second scheduling information, and determine the status of the received data packets.

In this way, the UE can receive data packets from the corresponding transport block and perform demodulation according to the scheduling information related to the HARQ process indicated in the DCI.

In a third aspect, an embodiment of the present invention provides a base station for performing the method described in the first aspect, the base station may include:

a sending unit, configured to send a data packet to the user equipment UE through the first transport block of the first HARQ process;

A receiving unit, configured to receive a HARQ feedback message returned by the UE, where the HARQ feedback message is used to: feed back the data packets received by the UE and sent by the base station through the first transport block of the first HARQ process Happening;

The sending unit is further configured to, if all the HARQ processes supported by the base station have been used when the receiving unit receives the HARQ feedback message, pass the HARQ process of the first HARQ process according to the HARQ feedback message. The second transport block sends data packets to the UE.

In this way, when the receiving unit receives the HARQ feedback message and all the HARQ processes are used, the data packets can be sent to the UE in time through another transport block in the HARQ process, so that the data packets can be scheduled in time and the waste of resources can be avoided and the issue of overall performance loss.

For the specific execution process of the sending unit and the receiving unit, reference may be made to the execution process in the method described in the first aspect, and details are not described herein again.

It should be noted that, the receiving unit and the receiving unit described in the third aspect may be integrated into a transceiver in a base station.

In a fourth aspect, an embodiment of the present invention provides a user equipment UE, configured to perform the method described in the second aspect, the user equipment may include:

a receiving unit, configured to receive a data packet of the first transport block that passes through the first HARQ process and is sent by the base station;

a processing unit, configured to determine the situation of the data packet received by the receiving unit and sent by the base station through the first transport block of the first HARQ process;

a sending unit, configured to return a HARQ feedback message to the base station, where the HARQ feedback message is used to: feed back the situation of the data packet received by the receiving unit determined by the processing unit;

The receiving unit is further configured to receive the base station through the first HARQ feedback message according to the HARQ feedback message if all the HARQ processes supported by the base station have been used when the base station receives the HARQ feedback message. The second transport block of the HARQ process sends data packets to the UE.

In this way, after the UE feeds back the HARQ feedback message to the base station, when all HARQ processes are used, the data packet sent by the base station through another transport block in the HARQ process can be received, and the data packet can be scheduled in time, avoiding resource waste and The problem of overall performance loss.

For the specific execution process of the receiving unit, the processing unit, and the sending unit, reference may be made to the corresponding execution process in the method described in the second aspect, which will not be described in detail here.

It should be noted that, the receiving unit and the sending unit described in the fourth aspect may be transceivers in the user equipment, and the processing unit in the fourth aspect may be a separately established processor, or may be integrated in a certain processing unit of the user equipment In addition, it can also be stored in the memory of the user equipment in the form of program codes, and a certain processor of the user equipment calls and executes the functions of the above processing units. The processor described here may be a central processing unit (Central Processing Unit, CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention .

In a fifth aspect, an embodiment of the present invention further provides a data transmission system, including the base station according to the third aspect, and at least one user equipment according to the fourth aspect.

It can be seen from the above that the embodiments of the present invention provide a data transmission method, device and system. The base station sends a data packet to the user equipment UE through the first transmission block of the first HARQ process, and receives the HARQ feedback message returned by the UE. When the HARQ feedback message arrives, all HARQ processes supported by the base station have been used, and the base station sends a data packet to the UE through the second transport block of the first HARQ process according to the HARQ feedback message. In this way, data packets can be sent in time through another unused transport block in the HARQ process, and the HARQ process can be identified by means of the HARQ process number and different transport blocks in the HARQ process. A HARQ division identified by the HARQ process number is divided into multiple HARQ processes, which expands the number of HARQ processes and avoids the waste of resources and overall performance loss caused by the use of all HARQ processes when the base station receives the HARQ feedback message.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a HARQ scheduling sequence diagram under uplink and downlink configuration mode 2;

2 is a schematic diagram of a network architecture provided by an embodiment of the present invention;

3 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention;

4 is a flowchart of a data transmission method provided by an embodiment of the present invention;

FIG. 5 is a structural diagram of a base station according to an embodiment of the present invention;

FIG. 6 is a structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 7 is a structural diagram of another data transmission system provided by an embodiment of the present invention.

Detailed ways

The basic principle of the present invention is: when the base station receives the HARQ feedback message, all the HARQ processes supported by the base station are used, resulting in insufficient HARQ processes and the base station cannot perform HARQ scheduling in time. Instead of identifying a HARQ process, the HARQ process number and additional information (such as transport block information) are used to identify the HARQ process, that is, for a HARQ process, the HARQ process number and different transport block information can be used to identify different In the HARQ process, different transport blocks in the HARQ process are used to send data packets, and a HARQ identified by the HARQ process number is divided into multiple HARQ processes by different transport blocks, thereby expanding the used HARQ process.

For example, for HARQ process 1, HARQ process 1 and transport block 1, HARQ process 1 and transport block 2 can be used to identify two different HARQ processes, and transport block 1 of HARQ process 1 can be used to send packets, or , use the transport block 2 of the HARQ process 1 to send the data packet, add one HARQ process to two HARQ processes according to different transport blocks, and increase the number of HARQ processes.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

FIG. 2 is a schematic diagram of a network architecture provided by an embodiment of the present invention. The network can be applied to the data transmission method provided by the present embodiment. -Synchronous Code Division Multiple Access, TD-SCDMA) network. As shown in FIG. 2, the network architecture may include: a base station 10 and multiple user equipments 20 within the coverage of the base station 10. The base station 10 may be a base station (Base Transceiver Station, BTS) in a TD-SCDMA network, or It is an evolved base station (Evolutional Node B, eNB or e-NodeB) in LTE, which is not limited in the present invention. The user equipment 20 may be: UserUniqupment, UE, or may be: user equipment (Terminal), mobile station (Mobile Station, MS), mobile user equipment (Mobile Terminal), etc. The present invention is not limited, and the user equipment 20 may be wireless An access network (RadioAccessNetwork, RAN) communicates with one or more core networks, for example, the user equipment 20 may be a mobile phone, a computer with a mobile user equipment, etc., and may also be portable, pocket-sized, hand-held, built-in computer Or a vehicle-mounted mobile device, in this embodiment of the present invention, for the convenience of description, the following will take the base station eNB and the user equipment UE as examples for description.

The base station 10 may perform data communication with the user equipment 20 based on HARQ. Specifically, the base station 10 may send data packets to the user equipment 20 through double-codeword scheduling (corresponding to two transport blocks (TBs)) of the HARQ process. , the data packet may also be sent to the user equipment 20 through the single codeword scheduling of the HARQ process, and correspondingly, the user equipment 20 may have a dual codeword demodulation function or a single codeword demodulation function.

In order to realize HARQ-based communication, as shown in FIG. 3 , the base station 10 may include: a transceiver 1011, a processor 1012, a memory 1013 and at least one communication bus 1014, for realizing the connection and mutual communication between these devices; The user equipment 20 may include: a transceiver 2011, a processor 2012, a memory 2013, and at least one communication bus 2014, for implementing connection and mutual communication between these devices;

The transceiver 1011 and the transceiver 2011 can be implemented by antennas and can be used for data interaction with external network elements. For example, the transceiver 1011 of the base station 10 can send and receive data packets with the user equipment 20; the user equipment 20 The transceiver 2011 can send and receive data packets with the UE or the base station 10 .

The processor 1012 and the processor 2012 may be a central processing unit (CPU), a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or are configured to implement one or more of the embodiments of the present invention. multiple integrated circuits. For example: one or more microprocessors (digital singnal processor, DSP), or, one or more field programmable gate arrays (Field Programmable Gate Array, FPGA).

The memory 1013 and the memory 2013 may be volatile memory (volatile memory), such as random-access memory (random-access memory, RAM); or non-volatile memory (non-volatile memory). For example, read-only memory (ROM), flash memory (flash memory), hard disk drive (HDD) or solid-state drive (SSD); or a combination of the above types of memory.

The communication bus 1014 and the communication bus 2014 can be divided into an address bus, a data bus, a control bus, etc., and can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an extended industry standard Architecture (Extended IndustryStandard Architecture, EISA) bus and so on. For ease of presentation, only one thick line is used in FIG. 3, but it does not mean that there is only one bus or one type of bus.

Specifically, the processor 1012 in the base station 10 may be configured to: carry the data packet on the first transport block in the first HARQ process, and send the data packet by the transceiver 1011 to the transceiver 2011 of the user equipment 20; the first HARQ The process may be any HARQ process among the HARQ processes supported by the base station.

The processor 2012 may be configured to: after the transceiver 2011 receives the data packet, determine the condition of the data packet, and return HARQ feedback information for feeding back the condition of the data packet to the transceiver 1011 through the transceiver 2011 .

If all HARQ processes supported by the base station are used when the transceiver 1011 receives the HARQ feedback information, the processor 1012 can also be used to: carry the data packet in the second transport block of the first HARQ process, and the transceiver 1011 sends the transceiver 1011 to the transceiver. The server sends the packet again.

In this way, when all the HARQ processes are used when the base station receives the HARQ feedback message, the data packets can be sent in time through another unused transport block in the HARQ process, so that the data packets can be scheduled in time, avoiding the need for resources The problem of waste and overall performance loss.

Optionally, before the transceiver 1011 sends the data packet to the transceiver 2011, the transceiver 1011 also needs to send the scheduling information of the first HARQ process to the transceiver 2011, so that the processor 2012 determines to send the data packet this time according to the scheduling information. which transport block in the first HARQ process, and what is the modulation and coding scheme, redundancy version information and new data indication adopted by this transport block. Specifically, before the processor 1012 carries the data packet in the first transport block of the first HARQ process and sends the data packet to the transceiver 2011 through the transceiver 1011, the processor 1012 can also be used to:

The first scheduling information of the first HARQ process is encapsulated in downlink control information (Downlink Control Information, DCI), and the first scheduling information is sent by the transceiver 1011 to the transceiver 2011; the first scheduling information includes: the process ID of the first HARQ process , the identification information of the first transport block of the first HARQ process, and the control information of the first transport block of the first HARQ process, the control information of the first transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new packet indication information;

The processor 2012 may be further configured to: receive the data packet from the first transport block of the first HARQ process according to the first scheduling information, and determine the situation of the received data packet according to the control information of the first transport block.

Wherein, the identification information of the first transport block of the first HARQ process is used to identify the first transport block of the first HARQ process.

Optionally, after the transceiver 1011 receives the HARQ feedback information, the processor 1012 carries the data packet in the second transport block of the first HARQ process, and before the transceiver 1011 sends the data packet to the transceiver 2011 again, the processing is performed. The device 1012 can also be used to:

The second scheduling information of the first HARQ process is encapsulated in the DCI, and the transceiver 1011 will send the second scheduling information to the transceiver 2011; the second scheduling information includes: the process number of the first HARQ process, the first HARQ process No. The identification information of the second transport block and the control information of the second transport block of the first HARQ process, the control information of the second transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information;

The processor 2012 may be further configured to: receive the data packet from the second transport block of the first HARQ process according to the second scheduling information, and determine the status of the received data packet according to the control information of the second transport block.

Wherein, the identification information of the second transport block of the first HARQ process is used to identify the second transport block of the first HARQ process.

For ease of description, the following embodiments illustrate and describe in detail the process of the data transmission method in the form of steps, wherein the illustrated steps can also be executed in a computer system that can execute a set of instructions. Furthermore, although a logical order is shown in the figures, in some cases, steps shown or described may be performed in an order different from that herein.

FIG. 4 is a flowchart of a data transmission method provided by an embodiment of the present invention, which is performed interactively by the base station 10 and the user equipment 20 shown in FIG. 2 ; as shown in FIG. 4 , the method may include the following steps:

S101: The base station sends a data packet to the user equipment through the first transport block of the first HARQ process.

The number of downlink HARQ processes supported by the base station may be M, where M is an integer not less than 1.

Optionally, the number M of downlink HARQ processes supported by the base station may be different according to the difference in the uplink and downlink ratios between the base station and the user equipment, and each HARQ process may correspond to a transmission time interval (Transmit TimeInterval, TTI). Specifically, Table 1 shows the number of downlink HARQ processes specified in the 36.213 protocol:

Table 1

Up and down ratio Number of downlink HARQ processes 0 4 1 7 2 10 3 9 4 12 5 15 6 6

The M HARQ processes may include a single-codeword scheduling HARQ process and a dual-codeword scheduling HARQ process, the first HARQ process may be any one of the M HARQ processes, and the first transport block may be the first HARQ process Any transport block supported by the process.

It should be noted that the HARQ process scheduled with a single codeword may refer to a HARQ process that sends data packets to the user equipment through only one transport block, and the HARQ process scheduled with a double codeword may refer to: a HARQ process that sends data packets to the user equipment through two transport blocks at the same time For the HARQ process of the data packet, since, in the current communication network, the HARQ process supports at most two-codeword scheduling, the embodiment of the present invention only takes the HARQ process supporting at most two-codeword scheduling as an example for description, but it is understandable that , with the development of communication technology, the HARQ process can also support the scheduling of more code words. When the HARQ process supports the scheduling of more than two code words, the base station can also use the data transmission method provided by the embodiment of the present invention. More than two transport blocks corresponding to a process transmit data packets to the UE.

S102: The user equipment receives the data packet sent by the base station through the first transport block of the first HARQ process, and returns a HARQ feedback message to the base station according to the received data packet; the HARQ feedback message is used to: feed back the user equipment The received data packets sent by the base station through the first transport block of the first HARQ process.

The HARQ feedback message may be: a positive acknowledgement (Acknowledgement, ACK) message, or a negative acknowledgement (Negative Acknowledgement, NACK). Optionally, when the data packet received by the user equipment is correct, the HARQ feedback message is an ACK message, and when the data packet received by the user equipment is incorrect, the HARQ feedback message is a NACK message.

Specifically, the user equipment may receive data packets on the transport block of the corresponding HARQ process according to the scheduling message of the HARQ process, and demodulate the received data packets according to the relevant information in the scheduling message to determine the demodulated data packets Whether it is correct or incorrect, wherein, the scheduling message of the HARQ process can be sent by the base station to the user equipment through the downlink control information DCI in the Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), such as: at the base station through the first HARQ process Before sending the data packet to the UE in the first transport block, the method may further include:

The base station sends the first scheduling information of the first HARQ process to the UE through the DCI, where the first scheduling information includes: the process number (HARQ process number) of the first HARQ process, the identification information of the first transport block of the first HARQ process, and the first HARQ process. Control information of the first transport block of a HARQ process, the control information of the first transport block of the first HARQ process includes: a scheduling and coding scheme (Modulation and coding scheme, MCS), a redundancy version number (Redundancy VersionNumber, RV) and a new Packet indication (New Data Indicator, NDI) information;

Correspondingly, in step S102, the user equipment may receive the data packet from the first transport block of the first HARQ process according to the first scheduling information, and determine the situation of the data packet according to the control information corresponding to the first transport block.

The HARQ process ID, which may also be referred to as a HARQ process identifier (ID), is used to uniquely designate a HARQ process without distinguishing codewords.

The identification information of the first transport block of the first HARQ process may be used to identify the first transport block of the first HARQ process.

The NDI value can be represented by 1 bit, which is not limited in the present invention. It is used to indicate whether the scheduled data is newly transmitted or retransmitted. If the NDI value of the same HARQ process has changed compared with the previous one, it indicates the current transmission is the initial transmission of a new transport block, otherwise, the current transmission is a retransmission of the same transport block.

RV: used to indicate the redundancy version used by the transport block, and its value ranges from 0 to 3.

MCS: A 5-bit MCS index (corresponding to a value range of 0 to 31) is used to indicate the modulation and coding scheme used by the current transport block, and the size of the transport block to be transmitted this time is determined together with the number of resource blocks.

It should be noted that the control information of the second transport block is not included in the first scheduling information, or, the control information of the second transport block is included in the first scheduling information, and the control information of the second transport block is used to indicate: the second transport block The transport block is not used to transmit the data packet, so that the UE directly receives the data packet from the first transport block of the first HARQ process after receiving the first control information.

Optionally, the base station can write the scheduling information of the HARQ process into the corresponding fields of the DCI according to different DCI formats. For example, the following table 2 shows the fields related to the HARQ process under different DCI formats:

Table 2

Among them, Yes in Table 2 indicates that the scheduling information of the HARQ process exists in the DCI under the DCI format, and No indicates that the information does not exist in the DCI under the DCI format. In addition, the control information of the first transport block corresponding to the HARQ process can be written in DCI 1/1A/1B/1D, that is, DCI 1/1A/1B/1D can be used to transmit the first transport block in single-codeword scheduling. Control information of 1 TB, DCI format 1C does not support HARQ process, DCI 2/2A/2B/2C/2D can write the control information of the first TB and the second TB corresponding to the HARQ process, namely DCI 2/2A/2B/2C/2D is used to transmit the control information of the 1st TB and the 2nd TB in the double codeword scheduling, because, in practical applications, if the DCI 2/2A/2B/2C/ The value of the MCS corresponding to a TB in 2D is 0, and the value of the RV is 1, it means that the TB is disabled, where the TB is disabled means: the TB is not currently used to transmit data packets, so, A TB can be disabled in DCI 2/2A/2B/2C/2D to achieve single-codeword scheduling, for example, the second TB can be disabled, and only the control information of the first TB can be transmitted, or , the first TB can be disabled, and only the control information of the second TB is transmitted.

Optionally, the user equipment determines the situation of the data packet according to the control information corresponding to the first transmission block, which may include:

The user equipment determines whether the data packet is initially transmitted or retransmitted according to the new data indication information;

If it is determined that the data packet is the initial transmission, the redundant bits corresponding to the redundancy version number are used to demodulate the data packet according to the adjustment coding scheme in the control information, and determine whether the data packet is correct or incorrect according to the demodulation result. If it is correct, send the data packet to the upper layer, if wrong, put the data packet into the soft buffer area (soft buffer) corresponding to the first transport block of the first HARQ process;

If it is determined that the data packet is retransmitted, the data packet is demodulated according to the adjustment coding scheme in the control information by using the redundant bits corresponding to the redundancy version number, and the demodulated data is compared with the first HARQ process. The data in the soft buffer area corresponding to a transport block is softly merged, and it is determined whether the data packet is correct or incorrect according to the merged result.

The soft buffer area may be an area corresponding to each HARQ process pre-divided by the user equipment, and used to store the data packets sent through the HARQ process in the area corresponding to the HARQ process. For example, if the base station supports a maximum of 10 HARQ processes, each HARQ process supports single-codeword scheduling, and during single-codeword scheduling, any one of the dual TBs can be selected to send data packets. To expand the 10 HARQ processes to 20 HARQ processes, 20 soft buffers need to be divided on the user equipment side to correspond to the 20 HARQ processes.

S103: The base station receives the HARQ feedback message. If the base station receives the HARQ feedback message, all HARQ processes supported by the base station have been used, and the base station sends a data packet to the user equipment through the second transmission block of the first HARQ process according to the HARQ feedback message. .

Optionally, if the HARQ feedback message is a NACK message, the base station may retransmit the data packet to the user equipment through the second transport block of the first HARQ process;

If the HARQ feedback message is an ACK message, the base station may transmit a new data packet to the user equipment through the second transport block of the first HARQ process, that is, retransmit a new data packet.

It is understandable that, in step S103 in this embodiment of the present invention, the second transport block (that is, the unused transport block) of the first HARQ process is preferably used to send the data packet to the user equipment. Packets may be transmitted with transport blocks that are not used in other HARQ processes.

In this way, data packets can be sent in time through other unused transport blocks in the HARQ process, so as to expand the number of original HARQ processes and avoid resource loss when all HARQ processes are used when the base station receives the HARQ feedback message. The problem of waste and overall performance loss.

In the following, the base station supports a maximum of 10 HARQ processes: 0 to 9 HARQ, each HARQ process is single-codeword scheduling, and each HARQ process supports up to two-codeword scheduling, and the downlink DCI uses those shown in Table 2 that can be used to indicate dual-codewords Taking any one of the DCI formats 2/2A/2B/2C/2D of the scheduling information to indicate the single-codeword scheduling information as an example to illustrate the above process:

On the base station side, 0-9 HARQ process numbers and transport block 1 (TB1) can be used to indicate 10 HARQ processes scheduled by a single codeword, and 0-9 HARQ process numbers and transport block 2 (TB2) can be used to indicate single-codeword scheduling. Another 10 HARQ processes.

The base station preferentially uses 0 to 9 HARQ process numbers and TB1 to indicate the scheduling information of the HARQ process scheduled by a single codeword. The content of the fields can be as follows:

HARQ process number-4bits (value range is 0～9)

for transport block 1:

Modulation and coding scheme-5bits (value range is 0～31)

Redundancy version-2bits (0/2/3/1 or 0/3/2/1 according to the number of retransmissions)

for transport block 2:

Modulation and coding scheme-5bits (value 0)

Redundancy version-2bits (value is 1)

The above fields indicate that in the current single-codeword scheduling, TB1 is used to transmit data packets, while TB2 is not used to transmit data packets.

After the HARQ process numbers from 0 to 9 and the 10 HARQ processes indicated by TB1 are used up, the HARQ process numbers from 0 to 9 and TB2 are used to indicate another 10 HARQ processes scheduled by a single codeword. The content of the fields related to the scheduling information can be as follows: Show:

HARQ process number-4bits (value range is 0～9)

for transport block 1:

Modulation and coding scheme-5bits (value 0)

Redundancy version-2bits (value is 1)

for transport block 2:

Modulation and coding scheme-5bits (value range is 0～31)

Redundancy version-2bits (0/2/3/1 or 0/3/2/1 according to the number of retransmissions)

The above fields indicate that in the current single-codeword scheduling, TB2 is used to transmit data packets, while TB1 is not used to transmit data packets.

On the terminal side, after reading the scheduling information that TB1 is used to transmit data packets and TB2 is not used to transmit data packets, the received data is stored in the HARQ process number according to the HARQ process number in the scheduling information. In the first 10 soft buffers corresponding to the process, for example, the data with the HARQ process number 0 is stored in the soft buffer No. 0, and the data with the HARQ process number 1 is stored in the soft buffer No. 1, and is inferred in turn until the HARQ process is stored. The data No. 9 is stored in the No. 9 softbuffer.

When it is read that TB1 is not used to transmit data packets and TB2 is used to transmit the scheduling information of data packets, the received data is stored in the corresponding last 10 soft buffers according to the HARQ process number in the scheduling information, such as : Store the data with the HARQ process number 0 in the soft buffer No. 10, store the data with the HARQ process number 1 in the soft buffer No. 11, and push them in sequence until the data with the HARQ process number 9 is stored in the No. 19 Inside the soft buffer.

If the demodulation is correct, the terminal side will feed back ACK, and transmit the data corresponding to the soft buffer to the upper layer; if the base station side receives the ACK, it can use the same HARQ process ID and TB scheduling information to schedule the next new transmission data. If the demodulation fails, NACK is fed back, and the data in the soft buffer is combined after the retransmission from the base station side arrives to obtain the retransmission combining gain; the base station uses the same HARQ process number and TB scheduling information when retransmitting.

It is understandable that, different from the above example, the base station can also preferentially use 0-9 HARQ process numbers and TB2 to indicate 10 HARQ processes. TB1 is used to indicate another 10 HARQ processes, wherein the scheduling process of the transport block of each HARQ process is the same as the above, and will not be described in detail here.

It can be seen from the above that an embodiment of the present invention provides a data transmission method. The base station sends a data packet to the user equipment UE through the first transmission block of the first HARQ process, and receives the HARQ feedback message returned by the UE. When all M HARQ processes supported by the base station have been used, the base station sends a data packet to the UE through the second transport block of the first HARQ process according to the HARQ feedback message. In this way, data packets can be sent in time through another unused transport block in the HARQ process, so as to expand the number of original HARQ processes and avoid the use of all HARQ processes when the base station receives the HARQ feedback message. The problem of wasting resources and losing overall performance.

The following embodiments of the present invention further provide a base station, preferably, the base station is used to implement the process performed by the base station in the above method.

FIG. 5 is a structural diagram of a base station 30 according to an embodiment of the present invention. As shown in FIG. 5 , the base station 30 may include:

The sending unit 301 is configured to send a data packet to a user equipment UE through a first transport block of the first HARQ process.

A receiving unit 302, configured to receive a HARQ feedback message returned by the UE, where the HARQ feedback message is used to: feed back a data packet received by the UE and sent by the base station through the first transport block of the first HARQ process Case.

The sending unit 301 is further configured to, if all the HARQ processes supported by the base station have been used when the receiving unit 302 receives the HARQ feedback message, pass the first HARQ feedback message according to the HARQ feedback message. The second transport block of the process sends a data packet to the UE.

Optionally, before the sending unit 301 sends the data packet to the UE through the first transport block of the first HARQ process, the sending unit 301 may also send the first scheduling information of the first HARQ process to the UE through the downlink control information DCI, so that the UE knows from which transport block of the first HARQ process the data packet is sent, and receives the data packet from the corresponding transport block of the first HARQ process according to the first scheduling information, and determines the situation of the received data packet .

The first scheduling information may include: the process ID of the first HARQ process, the identification information of the first transport block of the first HARQ process, and the control of the first transport block of the first HARQ process information, the control information of the first transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information.

It should be noted that the control information of the second transport block is not included in the first scheduling information, or, the control information of the second transport block is included in the first scheduling information, and the control information of the second transport block is used to indicate: the second transport block The transport block is not used to transmit the data packet, so that the UE directly receives the data packet from the first transport block of the first HARQ process after receiving the first control information.

Also optionally, before the sending unit 301 sends a data packet to the UE through the second transport block of the first HARQ process, the sending unit 301 also needs to send the first HARQ process to the UE through DCI the second scheduling information, so that the UE receives the data packet from the transport block indicated by the second scheduling information according to the second scheduling information, and determines the situation of the received data packet.

The second scheduling information may include: the process ID of the first HARQ process, the identification information of the second transport block of the first HARQ process, and the control of the second transport block of the first HARQ process information, the control information of the second transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information.

It is understandable that the control information of the first transport block is not included in the second scheduling information, or the control information of the first transport block is included in the second scheduling information, but the control information of the first transport block is It is indicated that the first transport block is not used to transmit the data block, so that the UE directly receives the data packet from the second transport block of the first HARQ process after receiving the second control information.

It should be noted that, the receiving unit 302 and the transmitting unit 301 in the base station 30 shown in FIG. 5 may be integrated into the transceiver 1011 in the base station 10 shown in FIG. 3 .

It can be seen from the above that an embodiment of the present invention provides a base station, which sends a data packet to a user equipment UE through the first transport block of the first HARQ process, and receives a HARQ feedback message returned by the UE. If the HARQ feedback message is received, the base station supports All HARQ processes have been used, according to the HARQ feedback message, send a data packet to the UE through the second transport block of the first HARQ process. In this way, data packets can be sent in time through another unused transport block in the HARQ process, so as to expand the number of original HARQ processes and avoid the use of all HARQ processes when the base station receives the HARQ feedback message. The problem of wasting resources and losing overall performance.

The following embodiments of the present invention further provide a user equipment, preferably, the user equipment is used to implement the process performed by the UE in the method steps.

FIG. 6 is a structural diagram of a user equipment 40 according to an embodiment of the present invention. As shown in FIG. 6 , the user equipment 40 may include:

The receiving unit 401 is configured to receive a data packet sent by the base station through the first transport block of the first HARQ process.

The processing unit 402 is configured to determine the situation of the data packet received by the receiving unit 401 and sent by the base station through the first transport block of the first HARQ process.

The sending unit 403 is configured to return a HARQ feedback message to the base station, where the HARQ feedback message is used to: feed back the situation of the data packet received by the receiving unit 401 determined by the processing unit 402 .

The receiving unit 401 is further configured to, if the base station receives the HARQ feedback message, all the HARQ processes supported by the base station have been used, receive the base station through the HARQ feedback message according to the HARQ feedback message. A data packet sent to the UE by the second transport block of a HARQ process.

Optionally, before the receiving unit 401 receives the data packet sent by the base station through the first transport block of the first HARQ process, the receiving unit 401 may also be used to:

Receive the first scheduling information of the first HARQ process sent by the base station through downlink control information DCI; the first scheduling information includes: the process ID of the first HARQ process, the first HARQ process of the first HARQ process The identification information of the transport block, and the control information of the first transport block of the first HARQ process, where the control information of the first transport block of the first HARQ process includes: a scheduling coding scheme, a redundancy version number, and a new data packet instruction information;

The processing unit 402 is specifically configured to: receive a data packet from the first transport block of the first HARQ process according to the first scheduling information, and determine a situation of the received data packet.

Optionally, before the receiving unit 401 receives the data packet sent by the base station to the UE through the second transport block of the first HARQ process, the receiving unit 401 may be further configured to:

Receive second scheduling information of the first HARQ process sent by the base station to the UE through DCI, where the second scheduling information includes: a process number of the first HARQ process, a first HARQ process number of the first HARQ process The identification information of the second transport block, and the control information of the second transport block of the first HARQ process, the control information of the second transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data Package instructions.

It should be noted that, the receiving unit 401 and the sending unit 403 in the user equipment 40 in FIG. 6 may be the transceiver 2011 in the user equipment 20 shown in FIG. 2 , and the processing unit 402 may be the independent processor 2012 in FIG. 2 , It can also be integrated in a certain processor 2012 of the user equipment 20 to realize, in addition, it can also be stored in the memory 2013 of the user equipment 20 in the form of program code, and is called by a certain processor 2012 of the user equipment 20 to execute the above processing. Function of unit 402. The processor described herein may be a CPU, or an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.

It can be seen from the above that an embodiment of the present invention provides a user equipment, the receiving base station sends a data packet to the user equipment UE through the first transport block of the first HARQ process, and returns the HARQ feedback message to the base station. If the base station receives the HARQ feedback message , the HARQ processes supported by the base station have all been used, and the user equipment UE receives the HARQ feedback message from the base station and sends a data packet to the UE through the second transport block of the first HARQ process. In this way, data packets can be sent in time through another unoccupied transport block in the HARQ process to expand the number of original HARQ processes and avoid the use of all HARQ processes when the base station receives the HARQ feedback message. resource waste and overall performance loss.

FIG. 7 is a structural diagram of a data transmission system according to an embodiment of the present invention. As shown in FIG. 7 , the system may include: a base station 30 and at least one user equipment 40;

The functions of the base station 30 are the same as those of the base station shown in FIG. 5 , and the functions of the user equipment 40 are the same as those of the user equipment shown in FIG. 6 , which will not be repeated here.

It can be seen from the above that the embodiment of the present invention provides a data transmission system, the base station sends a data packet to the user equipment UE through the first transmission block of the first HARQ process, and receives the HARQ feedback message returned by the UE, if the base station receives the HARQ feedback message When all the HARQ processes supported by the base station have been used, the base station sends a data packet to the UE through the second transport block of the first HARQ process according to the HARQ feedback message. In this way, data packets can be sent in time through another unused transport block in the HARQ process, so as to expand the number of original HARQ processes and avoid the use of all HARQ processes when the base station receives the HARQ feedback message. The problem of wasting resources and losing overall performance.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (20)

1. a data transmission method, is characterized in that, described method comprises: The base station sends a data packet to the user equipment UE through the first HARQ process number single-codeword scheduling transport block of the first hybrid automatic repeat request; receiving, by the base station, a HARQ feedback message returned by the UE, where the HARQ feedback message is used to: feed back a situation of the data packet received by the UE and sent by the base station through the first transport block; If, when the base station receives the HARQ feedback message, the HARQ process numbers that the base station supports single-codeword scheduling have all been used, the base station will, according to the HARQ feedback message, pass the HARQ process number of the first HARQ process number. The second transport block scheduled with a single codeword sends a data packet to the UE, and the first transport block and the second transport block are transport blocks that support double-codeword scheduling by the first HARQ process number. 2. The method according to claim 1, wherein before the base station sends the data packet to the UE through the first transport block scheduled by the single codeword of the first HARQ process number, the method further comprises: The base station sends the first scheduling information of the single-codeword scheduling of the first HARQ process number to the UE through the downlink control information DCI, so that the UE can start the first HARQ process from the first HARQ process according to the first scheduling information. The first transport block of the received data packet, and determine the situation of the received data packet; The first scheduling information includes: the process ID of the first HARQ process, the identification information of the first transport block of the first HARQ process, and the control information of the first transport block of the first HARQ process. The control information of the first transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information. 3. The method of claim 2, wherein Control information for the second transport block is not included in the first scheduling information; Alternatively, the first scheduling information includes control information of the second transport block, where the control information of the second transport block is used to indicate that the second transport block is not used for transmitting data packets. The method according to any one of claims 1-3, wherein before the base station sends a data packet to the UE through the second transport block scheduled by the single codeword of the first HARQ process number , the method also includes: The base station sends the second scheduling information of the first HARQ process to the UE through DCI, so that the UE receives a data packet from the second transport block of the first HARQ process according to the second scheduling information, and determine the condition of the received packets; The second scheduling information includes: the process ID of the first HARQ process, the identification information of the second transport block of the first HARQ process, and the control information of the second transport block of the first HARQ process. The control information of the second transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information. 5. The method according to claim 4, characterized in that, control information of the first transport block is not included in the second scheduling information; Alternatively, the second scheduling information includes control information of the first transport block, where the control information of the first transport block is used to indicate that the first transport block is not used for transmitting data packets. 6. A data transmission method, characterized in that the method comprises: The user equipment UE receives the data packet sent by the base station through the first transmission block scheduled by the single codeword of the first HARQ process number requesting HARQ process number; The UE determines the received data packets sent by the base station through the first transport block, and returns a HARQ feedback message to the base station, where the HARQ feedback message is used to: feed back the data received by the UE the condition of the package; If, when the base station receives the HARQ feedback message, all HARQ process numbers that the base station supports single-codeword scheduling have been used, the UE receives the HARQ feedback message from the base station through the first A data packet sent to the UE by the second transport block of the single-codeword scheduling of the HARQ process number, the first transport block and the second transport block are transmissions of the first HARQ process number that support double-codeword scheduling piece. 7. The method according to claim 6, wherein before the UE receives the data packet sent by the base station through the first transport block scheduled by the single codeword of the first HARQ process number, the method further comprises: The UE receives the first scheduling information of the first HARQ process sent by the base station through the downlink control information DCI; the first scheduling information includes: the process ID of the first HARQ process, the first HARQ process and the control information of the first transport block of the first HARQ process, the control information of the first transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information; The situation in which the UE determines that the received data packet sent by the base station through the first transport block includes: The UE receives data packets from the first transport block according to the first scheduling information, and determines the status of the received data packets. 8. The method of claim 7, wherein Control information for the second transport block is not included in the first scheduling information; Alternatively, the first scheduling information includes control information of the second transport block, where the control information of the second transport block is used to indicate that the second transport block is not used for transmitting data packets. 9 . The method according to claim 6 , wherein when the UE receives the second transport block scheduled by the base station through the single codeword of the first HARQ process number to the UE. 10 . Before sending the data packet, the method further includes: The UE receives second scheduling information of the first HARQ process sent by the base station through DCI, where the second scheduling information includes: a process ID of the first HARQ process, a second scheduling information of the first HARQ process The identification information of the transport block, and the control information of the second transport block of the first HARQ process, where the control information of the second transport block of the first HARQ process includes: a scheduling coding scheme, a redundancy version number, and a new data packet Instructions. 10. The method of claim 9, wherein: control information of the first transport block is not included in the second scheduling information; Alternatively, the second scheduling information includes control information of the first transport block, where the control information of the first transport block is used to indicate that the first transport block is not used for transmitting data packets. 11. A base station, wherein the base station comprises: a sending unit, configured to send a data packet to the user equipment UE through the first transmission block of the single-codeword scheduling of the first hybrid automatic repeat request HARQ process number; a receiving unit, configured to receive a HARQ feedback message returned by the UE, where the HARQ feedback message is used to: feed back a situation of the data packet received by the UE and sent by the base station through the first transport block; The sending unit is further configured to, if the receiving unit receives the HARQ feedback message, all the HARQ process numbers supported by the base station supporting single-codeword scheduling have been used, then, according to the HARQ feedback message, pass the HARQ feedback message. The second transport block of the single-codeword scheduling of the first HARQ process number sends a data packet to the UE, and the first transport block and the second transport block are those of the first HARQ process number that support dual-codeword scheduling transport block. 12. The base station according to claim 11, wherein the sending unit is further configured to: Before the sending unit sends the data packet to the UE through the first transport block scheduled by the single codeword of the first HARQ process number, the sending unit sends the first scheduling information of the first HARQ process to the UE through the downlink control information DCI, so that receiving, by the UE, a data packet from the first transport block according to the first scheduling information, and determining a condition of the received data packet; The first scheduling information includes: the process ID of the first HARQ process, the identification information of the first transport block of the first HARQ process, and the control information of the first transport block of the first HARQ process. The control information of the first transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information. 13. The base station according to claim 12, wherein, Control information for the second transport block is not included in the first scheduling information; Alternatively, the first scheduling information includes control information of the second transport block, where the control information of the second transport block is used to indicate that the second transport block is not used for transmitting data packets. 14. The base station according to any one of claims 11-13, wherein the sending unit is further configured to: Before the sending unit sends a data packet to the UE through the second transport block scheduled by the single codeword of the first HARQ process number, send the second scheduling information of the first HARQ process to the UE through DCI, to causing the UE to receive a data packet from the second transport block of the first HARQ process according to the second scheduling information, and determine the situation of the received data packet; The second scheduling information includes: the process ID of the first HARQ process, the identification information of the second transport block of the first HARQ process, and the control information of the second transport block of the first HARQ process. The control information of the second transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information. 15. The base station according to claim 14, wherein, control information of the first transport block is not included in the second scheduling information; Alternatively, the second scheduling information includes control information of the first transport block, where the control information of the first transport block is used to indicate that the first transport block is not used for transmitting data packets. 16. A user equipment UE, wherein the UE comprises: a receiving unit, configured to receive the data packet sent by the base station through the first transmission block scheduled by the single codeword of the first HARQ process number requesting HARQ process number; a processing unit, configured to determine the situation of the data packet received by the receiving unit and sent by the base station through the first transport block; a sending unit, configured to return a HARQ feedback message to the base station, where the HARQ feedback message is used to: feed back the situation of the data packet received by the receiving unit determined by the processing unit; The receiving unit is further configured to receive the base station according to the HARQ feedback message if all HARQ process numbers supported by the base station supporting single-codeword scheduling have been used when the base station receives the HARQ feedback message, A data packet sent to the UE through the second transport block scheduled by the single codeword of the first HARQ process number, the first transport block and the second transport block are the first HARQ process number supporting dual Codeword-scheduled transport block. 17. The UE according to claim 16, wherein the receiving unit is further configured to: Before the receiving unit receives the data packet sent by the base station through the first transport block scheduled by the single codeword of the first HARQ process number, the receiving unit receives the first HARQ process sent by the base station to the UE through downlink control information DCI the first scheduling information; the first scheduling information includes: the process ID of the first HARQ process, the identification information of the first transport block of the first HARQ process, and the first transmission control information of the block, the control information of the first transport block of the first HARQ process includes: scheduling and coding scheme, redundancy version number and new data packet indication information; The processing unit is configured to receive a data packet from the first transmission block according to the first scheduling information, and determine the status of the received data packet. 18. The UE of claim 17, wherein, Control information for the second transport block is not included in the first scheduling information; Alternatively, the first scheduling information includes control information of the second transport block, where the control information of the second transport block is used to indicate that the second transport block is not used for transmitting data packets. 19. The UE according to any one of claims 16-18, wherein the receiving unit is further configured to: Before the receiving unit receives the data packet sent by the base station to the UE through the second transport block scheduled by the single codeword of the first HARQ process number, the receiving unit receives the data packet sent by the base station to the UE through DCI the second scheduling information of the first HARQ process; The second scheduling information includes: the process ID of the first HARQ process, the identification information of the second transport block of the first HARQ process, and the control information of the second transport block of the first HARQ process. The control information of the second transport block of the first HARQ process includes: scheduling coding scheme, redundancy version number and new data packet indication information. 20. The UE of claim 19, wherein, control information of the first transport block is not included in the second scheduling information; Alternatively, the second scheduling information includes control information of the first transport block, where the control information of the first transport block is used to indicate that the first transport block is not used for transmitting data packets.

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