WO2018000373A1 - 一种数据传输方法、设备及系统 - Google Patents

一种数据传输方法、设备及系统 Download PDF

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Publication number
WO2018000373A1
WO2018000373A1 PCT/CN2016/088001 CN2016088001W WO2018000373A1 WO 2018000373 A1 WO2018000373 A1 WO 2018000373A1 CN 2016088001 W CN2016088001 W CN 2016088001W WO 2018000373 A1 WO2018000373 A1 WO 2018000373A1
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Prior art keywords
transport block
harq process
base station
data packet
harq
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PCT/CN2016/088001
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English (en)
French (fr)
Inventor
鲍坤超
朱莉
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华为技术有限公司
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Priority to CN201680087336.3A priority Critical patent/CN109478958B/zh
Priority to PCT/CN2016/088001 priority patent/WO2018000373A1/zh
Publication of WO2018000373A1 publication Critical patent/WO2018000373A1/zh

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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method, device, and system.
  • LTE Long Term Evolution
  • HARQ Hybrid Automatic Repeat Request
  • TDD Time Division Duplex
  • MAC Access Control
  • the number of downlink HARQ processes supported by different uplink and downlink ratios is different.
  • the number of downlink HARQ processes supported by the uplink and downlink ratio mode 0 (the number of HARQ processes that can be used) is 4, up and down.
  • the number of downlink HARQ processes supported by row ratio mode 2 is 10.
  • the base station notifies the user equipment (User Uniqupment, UE) of the scheduling information related to the HARQ process by using Downlink Control Information (DCI), and adopts a scheduling manner corresponding to the HARQ process.
  • DCI Downlink Control Information
  • the UE sends a data packet to the UE, and the UE performs corresponding processing on 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 data packet to the base station according to the processing result.
  • the HARQ feedback message includes: a Negative Acknowledgement (NACK) message or an Acknowledgment (ACK) message, so that the base station passes the available after receiving the HARQ feedback message (ie, the current time is not used.
  • NACK Negative Acknowledgement
  • ACK Acknowledgment
  • the HARQ process performs a new transmission of the data packet, or performs the retransmission processing using the same HARQ process as before.
  • FIG. 1 is a HARQ scheduling sequence diagram in the uplink and downlink ratio mode 2, wherein the number of available HARQ processes in the uplink and downlink ratio mode 2 is 10.
  • the radio frame #0 Subframe #9, radio frame #1 subframe #0, radio frame #1 subframe #1, radio frame #1 subframe #3 uses four HARQ processes, and the user equipment reports this on radio frame #1 subframe #7.
  • HARQ feedback results for 4 frames due to the air interface delay, the L1 processing delay, and the inter-board transmission delay, the base station side may not receive the HARQ feedback result until the radio frame #2 subframe #1 (the HARQ of the four frames is represented by NACK1 in the figure). Feedback results).
  • the base station side L2 may have to receive the HARQ feedback result in the radio frame #2 subframe #6 (the HARQ feedback result of the four frames is represented by NACK2 in the figure).
  • the radio frame #1 subframe #9 Up to the radio frame #1 subframe #9, 8 HARQ processes have been used, the radio frame #1 subframe #9 uses the ninth HARQ process, and the radio frame #2 subframe #0 uses the tenth HARQ process, Therefore, all the 10 available HARQ processes are exhausted, and the HARQ feedback result of the HARQ process of the previously scheduled subframe has not returned yet, which causes the radio frame #2 subframe #1 to be used because 10 HARQ processes are used. , resulting in wasted resources and system performance loss.
  • the embodiment of the present invention provides a data transmission method, device, and system, to solve the problem that when a base station receives a HARQ feedback message, the HARQ process is used up and cannot be scheduled in time, resulting in waste of resources and loss of system performance.
  • an embodiment of the present invention provides a data transmission method, where the method is performed by a base station, and the method may include:
  • the base station When the base station receives the HARQ feedback message returned by the UE, if the base station supports The HARQ process has all 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.
  • the M HARQ processes use M different HARQ process numbers one by one.
  • the M are identified by the HARQ process ID. If all HARQ processes are used, the base station transmits a data packet to the UE through the second transport block in the first HARQ.
  • a data packet is sent by using different transport blocks in the HARQ process, which is equivalent to identifying a HARQ process by using a HARQ process number and a different transport block in the HARQ process, and a HARQ that is originally identified by only the HARQ process ID.
  • the process is divided into multiple HARQ processes to expand the used HARQ process. 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 is used. To send data packets in time, so that data packets can be scheduled in time, avoiding the problem of resource waste and overall performance loss.
  • the base station may indicate scheduling information related to the HARQ process by using a downlink control message DCI, so that the UE determines, according to the scheduling information, that the current data packet is sent in the HARQ process.
  • DCI downlink control message
  • the downlink control information DCI is used to send, to the UE, the process ID of the first HARQ process, the identifier information of the first transport block of the first HARQ process, And 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 data is received.
  • the case of the data packet; the control information of the first transport block of the first HARQ process includes: a scheduling coding scheme, a redundancy version number, and new packet indication information.
  • the downlink control information DCI is used to send, to the UE, the process number of the first HARQ process and the second transport block of the first HARQ process.
  • Identification information, and Second scheduling information of the first HARQ process of the control information of the second transport block of the 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 determines the received data.
  • the case of the packet; the control information of the second transport block of the first HARQ process includes: a scheduling coding scheme, a redundancy version number, and new packet indication information.
  • the scheduling message related to the HARQ process can be sent to the UE in advance, so that the UE can know which transport block of the HARQ process the base station transmits the data packet, so that the UE receives the data packet and demodulates the data packet.
  • the second transport block of the first HARQ process when the base station sends a data packet to the UE by using the first transport block of the first HARQ process, the second transport block of the first HARQ process does not 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 of the second transport block is used. The information is used to indicate that the second transport block is not used to transmit a data packet.
  • the second scheduling information does not include the control information of the first transport block, or the second scheduling information includes the first The control information of the block is transmitted, but the control information of the first transport block is used to indicate that the first transport block is not used to transmit a data packet.
  • the scheduling information of a single transport block may be respectively indicated by using DCI format 2/2A/2B/2C/2D indicating dual codeword scheduling information.
  • the embodiment of the present invention provides a data transmission method, which is performed by a user equipment UE, and the method may include:
  • the UE receiving 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.
  • the HARQ feedback message can be received at the base station, and all HARQ processes are In the case of use, the data packet is sent in time through another transport block in the HARQ process, so that the data packet is scheduled in time, thereby avoiding the problem of resource waste and overall performance loss.
  • the receiving base station sends, by using the downlink control information DCI, the UE to: a process ID of the HARQ process, identification information of the first transport block of the first HARQ process, and first scheduling information of the first HARQ process of the control information of the first transport block of the first HARQ process; the first HARQ process
  • the control information of the first transport block includes: a scheduling coding scheme, a redundancy version number, and new packet indication information.
  • 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 a situation of the received data packet.
  • the receiving base station before the UE receives the data packet of the second transport block that is sent by the base station and passes the first HARQ process, the receiving base station sends the information to the UE by using the downlink control information DCI.
  • the control information of the second transport block of the HARQ process includes: a scheduling coding scheme, a redundancy version number, and new packet indication information.
  • the UE may receive a data packet from the second transport block of the first HARQ process according to the second scheduling information, and determine a situation of the received data packet.
  • the UE can receive the data packet from the corresponding transport block according to the scheduling information related to the HARQ process indicated in the DCI, and perform demodulation.
  • an embodiment of the present invention provides a base station, where the method of the first aspect is performed, where the base station may include:
  • a sending unit configured to send a data packet to the user equipment UE by using 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, by the UE, a data packet sent by the base station by using a first transport block of the first HARQ process happening;
  • the sending unit is further configured to: if the receiving unit receives the HARQ feedback message, the HARQ processes supported by the base station are all used, according to the HARQ feedback message, pass the first HARQ process.
  • the second transport block transmits a data packet to the UE.
  • the receiving unit receives the HARQ feedback message, if all the HARQ processes are used, the data packet is sent to the UE in time through another transport block in the HARQ process, so that the data packet is scheduled in time, thereby avoiding resource waste. And the problem of overall performance loss.
  • the receiving unit and the receiving unit in the third aspect may be integrated into a transceiver in a base station.
  • the embodiment of the present invention provides a user equipment (UE), which is used to perform the method in the second aspect, where the user equipment may include:
  • a receiving unit configured to receive, by the base station, a data packet of the first transport block that passes the first HARQ process
  • a processing unit configured to determine, by the receiving unit, a data packet sent by the base station by using a 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 a situation that the processing unit determines the data packet received by the receiving unit;
  • the receiving unit is further configured to: if the base station supports the HARQ feedback message, if the HARQ process supported by the base station is all used, the receiving the base station passes the first according to the HARQ feedback message.
  • the second transport block of the HARQ process sends a data packet to the UE.
  • the receiving base station sends the data packet sent by another transport block in the HARQ process, and the data packet is scheduled in time, thereby avoiding waste of resources and The problem of overall performance loss.
  • the specific execution process of the receiving unit, the processing unit, and the sending unit may refer to the corresponding execution process in the method in the second aspect, and details are not described herein again.
  • the receiving unit and the sending unit in the fourth aspect may be transceivers in the user equipment, and the processing unit in the fourth aspect may be a separately set processor, or may be integrated into one processing of the user equipment.
  • it can also be stored in the memory of the user equipment in the form of program code, and is called by one processor of the user equipment and performs the functions of the above processing unit.
  • the processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.
  • the 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.
  • the embodiment of the present invention provides a data transmission method, device, and system.
  • 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 When the HARQ feedback message is received, the HARQ process supported by the base station is all used, and 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.
  • the data packet can be sent in time through another unused transport block in the HARQ process, and the HARQ process is identified by means of the HARQ process number and different transport blocks in the HARQ process, and the original use only by the difference of the transport block.
  • a HARQ identified by the HARQ process ID is divided into multiple HARQ processes, and the number of HARQ processes is expanded, which avoids the problem of resource waste and overall performance loss caused by the use of all HARQ processes when the base station receives the HARQ feedback message.
  • 1 is a timing diagram of HARQ scheduling in uplink-downlink ratio mode 2;
  • FIG. 2 is a schematic diagram of a network architecture framework according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a data transmission method according to 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 disclosure.
  • FIG. 7 is a structural diagram of still another data transmission system according to an embodiment of the present invention.
  • the basic principle of the present invention is that, when the base station receives the HARQ feedback message, all the HARQ processes supported by the base station are used, resulting in insufficient HARQ process, and the base station cannot perform the HARQ scheduling problem in time, and is no longer uniquely used by the HARQ process ID.
  • Identifies a HARQ process and uses the HARQ process ID and additional information (such as transport block information) to identify the HARQ process.
  • additional information such as transport block information
  • the HARQ process ID and different transport block information can be used to identify different HARQ processes.
  • the HARQ process uses different transport blocks in the HARQ process to transmit data packets, and uses a HARQ identified by the HARQ process ID to differentiate into multiple HARQ processes by different transport blocks, thereby expanding the used HARQ process.
  • the HARQ process 1 and the transport block 1 can be used to identify two different HARQ processes, and the transport block 1 of the HARQ process 1 is used to transmit the data packet, or The transport block 2 of the HARQ process 1 is used to transmit data packets, and one HARQ process is added to two HARQ processes according to different transport blocks, thereby increasing the number of HARQ processes.
  • FIG. 2 is a schematic diagram of a network architecture according to an embodiment of the present invention.
  • the network may be applicable to the data transmission method provided by this embodiment, where the network may be: an LTE TDD network. It may also be a network that supports Time Division-Synchronous Code Division Multiple Access (TD-SCDMA).
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • the network architecture may include: a base station 10, and a plurality of user equipments 20 in 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 may be It is an evolved base station (Evolutional Node B, eNB or e-NodeB) in LTE, and the present invention is not limited thereto.
  • BTS Base Transceiver Station
  • eNB evolved base station
  • e-NodeB evolved base station
  • the user equipment 20 may be: User Uniqupment, UE, or may be: user equipment (Terminal), mobile station (Mobile Station, MS), mobile user equipment (Mobile Terminal), etc., and the present invention is not limited, and the user equipment 20 may be A radio access network (RAN) communicates with one or more core networks.
  • the user equipment 20 may be a mobile phone, a computer with a mobile user device, or the like, or may be portable, pocket, handheld, or computer.
  • the base station eNB and the user equipment UE will be described as an example.
  • the base station 10 can perform data communication with the user equipment 20 based on the HARQ. Specifically, the base station 10 can send the data packet to the user equipment 20 through the dual codeword scheduling of the HARQ process (corresponding to two transport blocks (TB)). The data packet may also be sent to the user equipment 20 through the single codeword scheduling of the HARQ process. Accordingly, the user equipment 20 may have a dual codeword demodulation function or a single codeword demodulation function.
  • the base station 10 may include: a transceiver 1011, a processor 1012, a memory 1013, and at least one communication bus 1014 for implementing connection and mutual communication between the 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 connections and mutual communication between the devices;
  • the transceiver 1011 and the transceiver 2011 can be implemented by an antenna, and can be used for data interaction with an external network element.
  • 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, the processor 2012 may be a central processor (central The processing unit (CPU) may also be an Application Specific Integrated Circuit (ASIC) or one or more integrated circuits configured to implement the embodiments of the present invention.
  • CPU central The processing unit
  • ASIC Application Specific Integrated Circuit
  • DSPs digital singal processors
  • FPGAs Field Programmable Gate Arrays
  • the memory 1013 and the memory 2013 may be a volatile memory such as a random-access memory (RAM) or a non-volatile memory.
  • RAM random-access memory
  • non-volatile memory For example, a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); or a combination of the above types of memories.
  • ROM read-only memory
  • HDD hard disk drive
  • SSD solid-state drive
  • 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 Industry Standard Architecture, EISA) bus, etc. For ease of representation, only one thick line is shown in Figure 3, but it does not mean that there is only one bus or one type of bus.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • 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, by the transceiver 1011, the data packet to the transceiver 2011 of the user equipment 20; the first HARQ
  • the process can be any HARQ process in the HARQ process supported by the base station.
  • the processor 2012 can be configured to: after the transceiver 2011 receives the data packet, determine the condition of the data packet, and return the HARQ feedback information for feeding back the data packet to the transceiver 1011 through the transceiver 2011.
  • the processor 1012 may be further configured to: carry the data packet in the second transport block of the first HARQ process, and send and receive by the transceiver 1011. The packet is sent again.
  • the base station receives the HARQ feedback message, when all the HARQ processes are used, the other transport block that is not used in the HARQ process may be used.
  • the data packet is sent, the data packet is scheduled in time, avoiding the problem of resource waste and overall performance loss.
  • the transceiver 1011 before the transceiver 1011 sends the data packet to the transceiver 2011, the transceiver 1011 further needs to send scheduling information of the first HARQ process to the transceiver 2011, so that the processor 2012 determines, according to the scheduling information, that the data packet is sent this time.
  • Which transport block in the first HARQ process is used, and the modulation coding scheme, redundancy version information, and new data indication used by the transport block are what.
  • the processor 1012 before the processor 1012 carries the data packet in the first transport block of the first HARQ process and sends the packet to the transceiver 2011 through the transceiver 1011, the processor 1012 may further be configured to:
  • the first scheduling information of the first HARQ process is encapsulated in the Downlink Control Information (DCI), and the first scheduling information is sent by the transceiver 1011 to the transceiver 2011.
  • the first scheduling information includes: a process of the first HARQ process. Number, 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: a scheduling coding scheme, a redundancy version Number and new packet indication information;
  • the processor 2012 is further 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 according to the control information of the first transport block.
  • the identifier information of the first transport block of the first HARQ process is used to identify the first transport block of the first HARQ process.
  • 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 second scheduling information is sent by the transceiver 1011 to the transceiver 2011.
  • the second scheduling information includes: a process number of the first HARQ process, and a 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: a scheduling coding scheme, a redundancy version number, and new packet indication information;
  • the processor 2012 is further configured to: receive a data packet from the second transport block of the first HARQ process according to the second scheduling information, and determine a situation of the received data packet according to the control information of the second transport block.
  • the identifier information of the second transport block of the first HARQ process is used to identify the second transport block of the first HARQ process.
  • FIG. 4 is a flowchart of a data transmission method according to an embodiment of the present invention, which is performed 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:
  • the base station sends a data packet to the user equipment by using the first transport block of the first HARQ process.
  • the number of downlink HARQ processes supported by the base station may be M, and M is an integer not less than 1.
  • the number of downlink HARQ processes supported by the base station may be different according to different uplink and downlink ratios between the base station and the user equipment, and each HARQ process may correspond to one Transmit Time Interval (TTI).
  • TTI Transmit Time Interval
  • Table 1 shows the number of downlink HARQ processes specified in the 36.213 protocol:
  • the M HARQ process 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.
  • the HARQ process of the single codeword scheduling may refer to: the HARQ process of transmitting the data packet to the user equipment by using only one transport block
  • the HARQ process of the dual codeword scheduling may refer to: sending the two HARQs to the user equipment through the two transport blocks at the same time.
  • the HARQ process of the data packet because the current HARQ process supports the dual codeword scheduling in the current communication network. Therefore, the embodiment of the present invention only uses the maximum codeword scheduling supported by the HARQ process as an example, but it can be understood that With the development of the communication technology, the HARQ process can also support the scheduling of more codewords.
  • the base station can also use the data transmission method provided by the embodiment of the present invention to pass the HARQ. More than two transport blocks corresponding to the process transmit data packets to the UE.
  • the user equipment receives a data packet sent by the base station by using 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 case of the received data packet transmitted by the base station through the first transport block of the first HARQ process.
  • the HARQ feedback message may be an Acknowledgement (ACK) message or a Negative Acknowledgement (NACK).
  • ACK Acknowledgement
  • NACK Negative Acknowledgement
  • the HARQ feedback message is an ACK message
  • the HARQ feedback message is a NACK message.
  • the user equipment may receive the data packet on the transport block of the corresponding HARQ process according to the scheduling message of the HARQ process, and demodulate the received data packet according to the related information in the scheduling message, and determine the demodulated data packet. Is it correct or erroneous, wherein the scheduling message of the HARQ process can be sent by the base station to the user equipment by using the downlink control information DCI in the Physical Downlink Control Channel (PDCCH), for example, the base station passes the first HARQ process.
  • the method may further include:
  • the base station sends the first scheduling information of the first HARQ process to the UE by using the DCI, where the first scheduling information includes: a process number of the first HARQ process (HARQ process number), identifier information of the first transport block of the first HARQ process, and 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 modulation and coding scheme (MCS), a redundancy version number (RV), and New Data Indicator (NDI) information;
  • MCS modulation and coding scheme
  • RV redundancy version number
  • NDI New Data Indicator
  • 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 status 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 specify a HARQ process without distinguishing the codeword.
  • 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 by the present invention. It is used to indicate whether the scheduled data is new or retransmitted. If the NDI value of the same HARQ process changes compared with before, it indicates the current transmission. Is the initial transmission of a new transport block, otherwise, it indicates that the current transmission is a retransmission of the same transport block.
  • RV Used to indicate the redundancy version used by the transport block, which ranges from 0 to 3.
  • the 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 number of resource blocks determines the size of the transport block to be transmitted this time.
  • 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 transport block is not used to transmit a data packet, so that after receiving the first control information, the UE directly receives the data packet from the first transport block of the first HARQ process.
  • the base station may write the scheduling information of the HARQ process to the corresponding field of the DCI according to different DCI formats.
  • Table 2 shows the different DCI formats. Fields related to the HARQ process:
  • Yes indicates that there is scheduling information of the HARQ process in the DCI in the DCI format
  • No indicates that the information does not exist in the DCI in the DCI format.
  • DCI 1/1A/1B/1D can write control information of the first transport block corresponding to the HARQ process, that is, DCI1/1A/1B/1D can be used to transmit the first in single codeword scheduling.
  • the DCI format 1C does not support the HARQ process
  • the DCI 2/2A/2B/2C/2D can write the control information of the first TB and the second TB corresponding to the HARQ process, that is, DCI2.
  • /2A/2B/2C/2D for transmitting control information for the 1st TB and 2nd TB in dual codeword scheduling, since, in practical applications, if DCI 2/2A/2B/2C/2D
  • the value of the MCS corresponding to a TB is 0, and the value of the RV is 1, indicating that the TB is disabled.
  • the TB is disabled to indicate that the TB is not currently used to transmit data packets.
  • a certain TB is disabled to implement single codeword scheduling. For example, the second TB can be disabled, only the first TB control information can be transmitted, or Make the first TB go to enable, Only the control information of the second TB is transmitted.
  • the user equipment determines the status of the data packet according to the control information corresponding to the first transport block, and may include:
  • the user equipment determines, according to the new data indication information, whether the data packet is a first transmission or a retransmission
  • the redundant bit corresponding to the redundancy version number is used.
  • the data packet is demodulated according to the adjustment coding scheme in the control information, and the data packet is determined to be correct or incorrect according to the demodulation result. If it is correct, the data packet is sent to the upper layer, and if it is wrong, the data packet is first placed.
  • the data packet is demodulated according to the adjustment coding scheme in the control information by using the redundancy bit 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 soft merged, and the data packet is determined to be correct or incorrect according to the combined result.
  • the soft buffer area may be an area corresponding to each HARQ process that is pre-divided by the user equipment, and used to store the data packet sent by the HARQ process in an 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 any single TB in the single codeword scheduling may select one of the TBs to transmit the data packet. Therefore, depending on the transport block, To extend the 10 HARQ processes to 20 HARQ processes, 20 soft buffers need to be allocated on the user equipment side to correspond to the 20 HARQ processes.
  • the base station receives the HARQ feedback message. If the base station supports the HARQ feedback message, and the HARQ process supported by the base station is all used, the base station sends the data packet to the user equipment by using the second transmission block of the first HARQ process according to the HARQ feedback message. .
  • the base station may retransmit the data packet to the user equipment by using the second transport block of the first HARQ process;
  • the base station may newly transmit a data packet to the user equipment by using the second transport block of the first HARQ process, that is, re-transmit a new data packet.
  • the second transport block (ie, the unused transport block) of the first HARQ process is used to send the data packet to the user equipment, in addition, the base station further Packets can be transmitted using transport blocks that are not used in other HARQ processes.
  • the data packet 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 all the HARQ processes being used when the base station receives the HARQ feedback message. Waste and integrity A problem that can be lost.
  • the base station supports a maximum of 10 HARQ processes: 0-9 HARQ, each HARQ process is a single codeword scheduling, each HARQ process supports a maximum of dual codeword scheduling, and the downlink DCI is used to indicate dual codewords as shown in Table 2.
  • the above process is illustrated by using one of the DCI formats 2/2A/2B/2C/2D of the scheduling information to indicate the single codeword scheduling information as an example:
  • 0 to 9 HARQ process numbers and transport block 1 may be used to indicate 10 HARQ processes scheduled by a single codeword
  • 0-9 9 HARQ process number and transport block 2 are used to indicate single codeword scheduling.
  • Another 10 HARQ processes are used.
  • the base station preferentially uses the 0-9 HARQ process ID and TB1 to indicate the scheduling information of the HARQ process scheduled by the single codeword.
  • the content of the field can be as follows:
  • HARQ process number-4bits (value range 0 to 9)
  • Redundancy version (0/2/3/1 or 0/3/2/1, depending on the number of retransmissions)
  • the above field indicates that TB1 is used to transmit data packets in the current single codeword scheduling, and TB2 is not used to transmit data packets.
  • the 0 ⁇ 9 HARQ process ID and the 10 HARQ processes indicated by TB1 are used up, the 0 ⁇ 9 HARQ process ID and TB2 are used to indicate another 10 single codeword scheduling HARQ processes.
  • the field content related to the scheduling information may be as follows: Show:
  • HARQ process number-4bits (value range 0 to 9)
  • Redundancy version (0/2/3/1 or 0/3/2/1, depending on the number of retransmissions)
  • the above field indicates that TB2 is used to transmit data packets in the current single codeword scheduling, and TB1 is not used to transmit data packets.
  • the received data is stored in the HARQ process according to the HARQ process ID in the scheduling information.
  • the first 10 soft buffers such as: HARQ process number 0 data is stored in soft disk 0, HARQ process number 1 data is stored in soft disk 1 and pushed in turn until HARQ process number The data for 9 is stored in the 9th soft buffer.
  • TB2 When TB1 is not used to transmit the data packet, TB2 is used to transmit the scheduling information of the data packet, and the received data is stored in the corresponding 10 soft buffers according to the HARQ process number in the scheduling information, such as : Store the data with the HARQ process ID 0 in the soft buffer No. 10, store the data with the HARQ process ID 1 in the soft buffer No. 11, and push it in turn until the data with the HARQ process number 9 is stored in the 19th. Inside the soft buffer.
  • the terminal side feeds back the ACK and transmits the data corresponding to the soft buffer to the upper layer. If the base station side receives the ACK, the same HARQ process ID and the TB scheduling information can be used to schedule the next new transmission data. If the demodulation fails, the NACK is fed back, and after waiting for the retransmission on the base station side to be merged with the data in the soft buffer, the retransmission combining gain is obtained; when the base station side retransmits, the same HARQ process number and TB scheduling information are used.
  • the base station can also preferentially use the 0-9 HARQ process ID and TB2 to indicate 10 HARQ processes.
  • the 0-9 HARQ process ID is used.
  • TB1 is used to indicate another 10 HARQ processes, where the scheduling process of the transport block of each HARQ process is the same as the above, and details are not described herein again.
  • an embodiment of the present invention provides a data transmission method, where a base station passes the The first transport block of a HARQ process sends a data packet to the user equipment UE, and receives the HARQ feedback message returned by the UE. If the base station supports the HARQ feedback message, all the M HARQ processes supported by the base station are used, and the base station according to the HARQ The feedback message sends a data packet to the UE through the second transport block of the first HARQ process. In this way, the data packet 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 all the HARQ processes being used when the base station receives the HARQ feedback message. Resource waste and overall performance loss issues.
  • the following embodiments of the present invention further provide a base station.
  • the base station is used to implement a process performed by a base station in the foregoing 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 the user equipment UE by using the first transport block of the first HARQ process.
  • the receiving unit 302 is configured to receive a HARQ feedback message that is returned by the UE, where the HARQ feedback message is used to: feed back, by the UE, a data packet sent by the base station by using a first transport block of the first HARQ process. Case.
  • the sending unit 301 is further configured to: when the receiving unit 302 receives the HARQ feedback message, if the HARQ process supported by the base station is all used, according to the HARQ feedback message, pass the first HARQ The second transport block of the process sends a data packet to the UE.
  • the sending unit 301 may further send the first scheduling information of the first HARQ process to the UE by using the downlink control information DCI. So that the UE knows which transport block of the first HARQ process to transmit the data packet, and receives the data packet from the corresponding transport block of the first HARQ process according to the first scheduling information, and determines the received data packet. .
  • the first scheduling information may include: a process ID of the first HARQ process, identification information of a first transport block of the first HARQ process, and control of a first transport block of the first HARQ process.
  • Information, the first HARQ process The control information of a transport block includes: a scheduling coding scheme, a redundancy version number, and new packet indication information.
  • 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 transport block is not used to transmit a data packet, so that after receiving the first control information, the UE directly receives the data packet from the first transport block of the first HARQ process.
  • the sending unit 301 before the sending unit 301 sends a data packet to the UE by using the second transport block of the first HARQ process, the sending unit 301 also needs to send the first HARQ process to the UE by using DCI. And 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 status of the received data packet.
  • the second scheduling information may include: a process ID of the first HARQ process, identification information of a second transport block of the first HARQ process, and control of a second transport block of the first HARQ process.
  • Information, the control information of the second transport block of the first HARQ process includes: a scheduling coding scheme, a redundancy version number, and new packet indication information.
  • control information of the first transport block is not included in the second scheduling information, or the second scheduling information includes the control information of the first transport block, but the control information of the first transport block is used.
  • the receiving unit 302 and the transmitting unit 301 in the base station 30 shown in FIG. 5 can be integrated into the transceiver 1011 in the base station 10 shown in FIG.
  • 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 HARQ feedback message is received, the base station supports The HARQ process has all been used, and according to the HARQ feedback message, the data packet is sent to the UE through the second transport block of the first HARQ process. So, you can pass another one in the HARQ process.
  • the used transport block sends data packets in time to expand the number of original HARQ processes, avoiding the problem of resource waste and overall performance loss caused by the use of all HARQ processes when the base station receives the HARQ feedback message.
  • the following embodiments of the present invention further provide a user equipment.
  • the user equipment is used to implement a process performed by a UE in a method step.
  • FIG. 6 is a structural diagram of a user equipment 40 according to an embodiment of the present invention. As shown in Figure 6, the user equipment 40 may include:
  • the receiving unit 401 is configured to receive a data packet that is sent by the base station by using the first transport block of the first HARQ process.
  • the processing unit 402 is configured to determine, by the receiving unit 401, a data packet that is sent by the base station by using 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 a situation that the processing unit 402 determines the data packet received by the receiving unit 401.
  • the receiving unit 401 is further configured to: if the base station supports the HARQ feedback message, if all the HARQ processes supported by the base station are used, the receiving the base station passes the foregoing according to the HARQ feedback message.
  • the receiving unit 401 before the receiving unit 401 receives the data packet sent by the base station by using the first transport block of the first HARQ process, the receiving unit 401 is further configured to:
  • the first scheduling information includes: a process number of the first HARQ process, and a first 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, 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 Indication 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.
  • the receiving unit 401 before the receiving unit 401 receives the data packet sent by the base station to the UE by using the second transport block of the first HARQ process, the receiving unit 401 is further configured to:
  • Receiving second scheduling information of the first HARQ process that is sent by the base station to the UE by using a DCI where the second scheduling information includes: a process number of the first HARQ process, and a first process 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, where the control information of the second transport block of the first HARQ process includes: a scheduling coding scheme, a redundancy version number, and new data.
  • Package instructions
  • 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. It can also be implemented in one of the processors 2012 of the user device 20, and can also be stored in the memory 2013 of the user device 20 in the form of program code, which is called by one of the processors 2012 of the user device 20 and performs the above processing.
  • the processor described herein can be a CPU, or an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.
  • the embodiment of the present invention provides a user equipment, where 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 a HARQ feedback message to the base station, if the base station receives the HARQ feedback message.
  • the HARQ process supported by the base station is all used, and the user equipment UE receives the data packet sent by the base station to the UE through the second transport block of the first HARQ process according to the HARQ feedback message.
  • the data packet can be sent in time through another unoccupied transport block in the HARQ process, so as to expand the number of original HARQ processes, and all the HARQ processes are used when the base station receives the HARQ feedback message. Resource waste and overall performance loss issues.
  • 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, at least one user equipment 40;
  • the base station 30 has the same function as the base station shown in FIG. 5, and the user equipment 40 and the figure The functions of the user equipment shown in FIG. 6 are the same, and will not be repeated here.
  • 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 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.
  • 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.
  • the data packet 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 all the HARQ processes being used when the base station receives the HARQ feedback message. Resource waste and overall performance loss issues.

Abstract

本发明实施例提供一种数据传输方法、设备及系统，涉及通信技术领域，以解决现有在基站接收到HARQ反馈消息时，所有HARQ进程被全部使用而不能及时调度，造成资源浪费和系统性能损失的问题。该方法包括：基站通过第一HARQ进程的第一传输块向用户设备UE发送数据包，并接收UE返回的HARQ反馈消息，若基站接收到HARQ反馈消息时，基站支持的HARQ进程已全部被使用，则基站根据HARQ反馈消息，通过第一HARQ进程的第二传输块向UE发送数据包。

Description

一种数据传输方法、设备及系统 技术领域
本发明涉及通信技术领域，尤其涉及一种数据传输方法、设备及系统。
背景技术
长期演进(Long Term Evolution，LTE)网络支持混合自动重传请求(Hybrid Automatic Repeat Request，HARQ)功能，在LTE TDD(Time Division Duplex，TDD)系统中通常采用N道并行HARQ进程在物理层或媒体访问控制(Media Access Control，MAC)层对等实体间对传输块进行发送和重传，用于在保证传输块成功发送的可靠性的同时提高吞吐量。
在LTE TDD系统中，不同的上下行配比支持的下行HARQ进程数是不同的，如：上下行配比模式0支持的下行HARQ进程数(即可使用的HARQ进程个数)为4，上下行配比模式2支持的下行HARQ进程数为10。对于每个HARQ进程而言，基站通过下行控制信息(Downlink Control Information，DCI)将与该HARQ进程相关的调度信息通知给用户设备(User Uniqupment，UE)，并通过与该HARQ进程对应的调度方式(如：双码字调度或单码字调度)向UE发送数据包，UE根据DCI中与该HARQ进程相关的调度信息对接收到的基站发送的数据包进行相应处理，并根据处理结果向基站发送HARQ反馈消息，HARQ反馈消息包含：否定应答(Negative Acknowledgement，NACK)消息或肯定应答(Acknowledgment，ACK)消息，以便基站在接收到HARQ反馈消息后，通过可用的(即：当前时刻未被使用的)HARQ进程进行数据包新传，或者采用与之前相同的HARQ进程进行重传处理。
但是，在实际应用中，由于HARQ反馈时序的限制，很容易存在当基站接收到UE发送的HARQ反馈消息时，HARQ进程已经全 部用完，无法及时地调度HARQ进程来传送数据包，必须等待下一时刻有HARQ进程释放时，才能调度该被释放HARQ进程新传数据包，严重影响了网络系统性能和用户体验速率。
例如：图1为上下行配比模式2下的HARQ调度时序图，其中，上下行配比模式2下可用的HARQ进程个数为10个，此时，如图1所示，无线帧#0子帧#9、无线帧#1子帧#0、无线帧#1子帧#1、无线帧#1子帧#3使用4个HARQ进程，用户设备在无线帧#1子帧#7上报这4个帧的HARQ反馈结果。但是由于空口时延、L1处理时延、板间传输时延等，基站侧可能要到无线帧#2子帧#1才能收到该HARQ反馈结果(图中用NACK1表示该4个帧的HARQ反馈结果)。无线帧#1子帧#4、无线帧#1子帧#5、无线帧#1子帧#6、无线帧#1子帧#8又使用另外4个HARQ进程，用户设备在无线帧#2子帧#2上报这4个帧的HARQ反馈结果。但是同样地基站侧L2可能要到无线帧#2子帧#6才能收到该HARQ反馈结果(图中用NACK2表示该4个帧的HARQ反馈结果)。到无线帧#1子帧#9为止，已经用了8个HARQ进程，无线帧#1子帧#9用第九个HARQ进程，无线帧#2子帧#0用第十个HARQ进程，自此，全部10个可用的HARQ进程全部用完，并且前面调度子帧的HARQ进程的HARQ反馈结果还没有回来，会导致无线帧#2子帧#1由于10个HARQ进程均被使用而不能调度，造成资源浪费和系统性能损失。
发明内容
本发明实施例提供一种数据传输方法、设备及系统，以解决在基站接收到HARQ反馈消息时，HARQ进程被用完而不能及时调度，造成资源浪费和系统性能损失的问题。
为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，本发明实施例提供一种数据传输方法，该方法由基站执行，该方法可以包括：
通过第一HARQ进程的第一传输块向用户设备UE发送数据包；
当基站接收到UE返回的HARQ反馈消息时，若基站支持的 HARQ进程已全部被使用，则基站根据HARQ反馈消息，通过第一HARQ进程的第二传输块向所述UE发送数据包。
例如，若基站最多可支持的HARQ进程数为M个，该M个HARQ进程一一对应的用M个不同HARQ进程号，当基站接收到HARQ反馈消息时，这M个用HARQ进程号标识的HARQ进程若全部被使用，则基站通过第一HARQ中的第二传输块向UE发送数据包。
即本申请中通过HARQ进程中的不同传输块来发送数据包，相当于用HARQ进程号及HARQ进程中不同的传输块的方式来标识一个HARQ进程，将原本仅用HARQ进程号标识的一HARQ进程区分为多个HARQ进程，以此扩充使用的HARQ进程，如此，可以在基站接收到HARQ反馈消息时，全部HARQ进程被使用的情况下，通过HARQ进程中的未被使用的另一传输块来及时发送数据包，使数据包得到及时调度，避免了资源浪费和整体性能损失的问题。
可选的，在第一方面的一种可实现方式中，基站可以通过下行控制消息DCI来指示与HARQ进程相关的调度信息，以使得UE根据调度信息确定本次发送数据包的是HARQ进程中的哪一个传输块，且该传输块采用的调制编码方案、冗余版本信息以及新数据指示是什么，具体实现如下：
在基站通过第一HARQ进程的第一传输块向UE发送数据包之前，通过下行控制信息DCI向UE发送包含：第一HARQ进程的进程号、第一HARQ进程的第一传输块的标识信息、以及第一HARQ进程的第一传输块的控制信息的第一HARQ进程的第一调度信息，以使得UE根据第一调度信息从第一HARQ进程的第一传输块接收数据包，并确定接收到的数据包的情况；第一HARQ进程的第一传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
同样的，在基站通过第一HARQ进程的第二传输块向UE发送数据包之前，通过下行控制信息DCI向UE发送包含：第一HARQ进程的进程号、第一HARQ进程的第二传输块的标识信息、以及第 一HARQ进程的第二传输块的控制信息的第一HARQ进程的第二调度信息，以使得UE根据第二调度信息从第一HARQ进程的第二传输块接收数据包，并确定接收到的数据包的情况；第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
如此，可以预先将与HARQ进程相关的调度消息发送至UE，使UE可以知道基站在哪个HARQ进程的哪个传输块上发送数据包，以便UE接收数据包，并对数据包进行解调。
可选的，在第一方面的又一种可实现方式中，在所述基站通过第一HARQ进程的第一传输块向UE发送数据包时，所述第一HARQ进程的第二传输块不被使用，具体体现为：第一调度信息中未包含所述第二传输块的控制信息，或者，第一调度信息中包含所述第二传输块的控制信息，所述第二传输块的控制信息用于指示：所述第二传输块未被用于传输数据包。
同理，在所述基站通过下行控制信息DCI向UE发送第二调度信息时，第二调度信息中未包含所述第一传输块的控制信息，或者，第二调度信息中包含所述第一传输块的控制信息，但所述第一传输块的控制信息用于指示：第一传输块未被用于传输数据包。
具体的，可以通过使用于指示双码字调度信息的DCI格式2/2A/2B/2C/2D来分别指示单个传输块的调度信息。
第二方面，本发明实施例提供一种数据传输方法，由用户设备UE执行，该方法可以包括：
接收基站发送的通过第一HARQ进程的第一传输块的数据包；
确定接收到的基站通过所述第一HARQ进程的第一传输块发送的数据包的情况，并向所述基站返回HARQ反馈消息；
若基站接收到HARQ反馈消息时，基站支持的HARQ进程已全部被使用，则UE接收基站根据HARQ反馈消息，通过第一HARQ进程的第二传输块向UE发送数据包。
如此，可以在基站接收到HARQ反馈消息，全部HARQ进程被 使用的情况下，通过HARQ进程中的另一传输块来及时发送数据包，使数据包得到及时调度，避免了资源浪费和整体性能损失的问题。
在第二方面的一种可实现方式中，在UE接收基站发送的通过第一HARQ进程的第一传输块的数据包之前，接收基站通过下行控制信息DCI向UE发送的包含：所述第一HARQ进程的进程号、第一HARQ进程的第一传输块的标识信息、以及第一HARQ进程的第一传输块的控制信息的第一HARQ进程的第一调度信息；所述第一HARQ进程的第一传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
相应的，UE可以根据所述第一调度信息从所述第一HARQ进程的第一传输块接收数据包，并确定接收到的数据包的情况。
同样，在第二方面的又一种可实现方式中，在UE接收基站发送的通过第一HARQ进程的第二传输块的数据包之前，接收基站通过下行控制信息DCI向UE发送的包含：所述第一HARQ进程的进程号、第一HARQ进程的第二传输块的标识信息、以及第一HARQ进程的第二传输块的控制信息的第一HARQ进程的第二调度信息；所述第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
相应的，UE可以根据所述第二调度信息从所述第一HARQ进程的第二传输块接收数据包，并确定接收到的数据包的情况。
如此，UE可以根据DCI中指示的与HARQ进程相关的调度信息，从相应的传输块上接收数据包，并进行解调。
第三方面，本发明实施例提供一种基站，用于执行第一方面所述的方法，该基站可以包括：
发送单元，用于通过第一HARQ进程的第一传输块向用户设备UE发送数据包；
接收单元，用于接收所述UE返回的HARQ反馈消息，所述HARQ反馈消息用于：反馈所述UE接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况；
所述发送单元，还用于若所述接收单元接收到所述HARQ反馈消息时，所述基站支持的HARQ进程已全部被使用，则根据所述HARQ反馈消息，通过所述第一HARQ进程的第二传输块向所述UE发送数据包。
如此，可以在接收单元接收到HARQ反馈消息时，全部HARQ进程被使用的情况下，通过HARQ进程中的另一传输块来向UE及时发送数据包，使数据包得到及时调度，避免了资源浪费和整体性能损失的问题。
其中，发送单元、接收单元的具体执行过程可以参照第一方面所述方法中的执行过程，在此不再详细赘述。
需要说明的是，第三方面所述的接收单元、接收单元可以集成为基站中的收发器。
第四方面，本发明实施例提供一种用户设备UE，用于执行第二方面所述的方法，该用户设备可以包括：
接收单元，用于接收基站发送的通过第一HARQ进程的第一传输块的数据包；
处理单元，用于确定所述接收单元接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况；
发送单元，用于向所述基站返回HARQ反馈消息，所述HARQ反馈消息用于：反馈所述处理单元确定出的所述接收单元接收到的数据包的情况；
所述接收单元，还用于若所述基站接收到所述HARQ反馈消息时，所述基站支持的HARQ进程已全部被使用，则接收所述基站根据所述HARQ反馈消息，通过所述第一HARQ进程的第二传输块向所述UE发送数据包。
如此，可以在UE向基站反馈HARQ反馈消息后，全部HARQ进程被使用的情况下，接收基站通过HARQ进程中的另一传输块发送的发送数据包，数据包得到及时调度，避免了资源浪费和整体性能损失的问题。
其中，接收单元、处理单元、发送单元的具体执行过程可以参照第二方面所述方法中的相应执行过程，在此不再详细赘述。
需要说明的是，第四方面所述的接收单元、发送单元可以为用户设备中的收发器，第四方面中的处理单元可以为单独设立的处理器，也可以集成在用户设备的某一个处理器中实现，此外，也可以以程序代码的形式存储于用户设备的存储器中，由用户设备的某一个处理器调用并执行以上处理单元的功能。这里所述的处理器可以是一个中央处理器(Central Processing Unit，CPU)，或者是特定集成电路(Application Specific Integrated Circuit，ASIC)，或者是被配置成实施本发明实施例的一个或多个集成电路。
第五方面，本发明实施例还提供一种数据传输系统，包括如第三方面所述的基站、以及至少一个如第四方面所述的用户设备。
由上可知，本发明实施例提供一种数据传输方法、设备及系统，基站通过第一HARQ进程的第一传输块向用户设备UE发送数据包，并接收UE返回的HARQ反馈消息，若基站接收到HARQ反馈消息时，基站支持的HARQ进程已全部被使用，则基站根据HARQ反馈消息，通过第一HARQ进程的第二传输块向UE发送数据包。如此，可以通过HARQ进程中另一未被使用的传输块来及时发送数据包，借助于HARQ进程号及HARQ进程中不同的传输块来标识HARQ进程，通过传输块的不同来将原有仅用HARQ进程号标识的一HARQ区分为多个HARQ进程，扩大HARQ进程的个数，避免了在基站接收到HARQ反馈消息时，全部HARQ进程被使用导致的资源浪费和整体性能损失的问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为上下行配比模式2下的HARQ调度时序图；
图2为本发明实施例提供的网络架构架示意图；
图3为本发明实施例提供的一种数据传输系统的结构示意图；
图4为本发明实施例提供的一种数据传输方法的流程图；
图5为本发明实施例提供的一种基站的结构图；
图6为本发明实施例提供的一种用户设备的结构图；
图7为本发明实施例提供的又一种数据传输系统的结构图。
具体实施方式
本发明的基本原理是：针对在基站接收到HARQ反馈消息时，基站支持的HARQ进程全部被使用，导致HARQ进程不足，基站不能及时进行HARQ调度的问题，不再单单的用HARQ进程号来唯一的标识一个HARQ进程，而是用HARQ进程号及额外信息(如：传输块信息)来标识HARQ进程，即对于HARQ进程而言，可以采用HARQ进程号及不同传输块信息的方式来标识不同的HARQ进程，用该HARQ进程中的不同传输块来发送数据包，将用用HARQ进程号标识的一HARQ通过传输块的不同区分为多个HARQ进程，以此扩充使用的HARQ进程。
例如，对于HARQ进程1而言，可以用HARQ进程1及传输块1、HARQ进程1及传输块2来标识两个不同的HARQ进程，用该HARQ进程1的传输块1来发送数据包，或者，用该HARQ进程1的传输块2来发送数据包，将一个HARQ进程根据传输块的不同增加到两个HARQ进程，提高HARQ进程的数量。
下面结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图2为本发明实施例提供的网络架构示意图，该网络可以适用于本实施例提供的数据传输方法，该网络可以为：LTE TDD网络， 也可以为支持时分同步的码分多址技术(Time Division-Synchronous Code Division Multiple Access，TD-SCDMA)的网络。如图2所示，该网络架构可以包括：基站10、以及该基站10覆盖范围内的多个用户设备20，基站10可以是TD-SCDMA网络中的基站(Base Transceiver Station，BTS)，也可以是LTE中的演进型基站(Evolutional Node B，eNB或e-NodeB)，本发明并不限定。用户设备20可以为：User Uniqupment，UE，也可以为：用户设备(Terminal)、移动台(Mobile Station，MS)、移动用户设备(Mobile Terminal)等，本发明并不限定，用户设备20可以经无线接入网(Radio AccessNetwork，RAN)与一个或多个核心网进行通信，例如，用户设备20可以是移动电话、具有移动用户设备的计算机等，还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，在本发明实施例中，为了描述方便，下述将以基站eNB和用户设备UE为例进行说明。
其中，基站10可以与用户设备20间基于HARQ进行数据通信，具体的，基站10可以通过HARQ进程的双码字调度(对应两个传输块(Transport Block，TB))向用户设备20发送数据包，也可以通过HARQ进程的单码字调度向用户设备20发送数据包，相应的，用户设备20可以具有双码字解调功能，也可以具有单码字解调功能。
为了实现基于HARQ的通信，如图3所示，所述基站10可以包括：收发器1011、处理器1012、存储器1013以及至少一个通信总线1014，用于实现这些装置之间的连接和相互通信；所述用户设备20可以包括：收发器2011、处理器2012、存储器2013以及至少一个通信总线2014，用于实现这些装置之间的连接和相互通信；
其中，收发器1011、收发器2011，可以由天线来实现，可用于与外部网元之间进行数据交互，如：基站10的收发器1011可收发与用户设备20间的数据包；用户设备20的收发器2011可收发与UE或基站10间的数据包。
处理器1012、处理器2012，可能是一个中央处理器(central  processing unit，CPU)，也可以是特定集成电路(Application Specific Integrated Circuit，ASIC)，或者是被配置成实施本发明实施例的一个或多个集成电路。例如：一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)。
存储器1013、存储器2013，可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；或者非易失性存储器(non-volatile memory)。例如只读存储器(read-only memory，ROM)，快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；或者上述种类的存储器的组合。
通信总线1014、通信总线2014可以分为地址总线、数据总线、控制总线等，可以是工业标准体系结构(Industry Standard Architecture，ISA)总线、外部设备互连(Peripheral Component，PCI)总线或扩展工业标准体系结构(Extended Industry Standard Architecture，EISA)总线等。为便于表示，图3中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
具体的，基站10中的处理器1012可以用于：将数据包承载在第一HARQ进程中的第一传输块上，由收发器1011向用户设备20的收发器2011发送数据包；第一HARQ进程可以为基站支持的HARQ进程中的任一HARQ进程。
处理器2012可以用于：在收发器2011接收到数据包后，确定该数据包的情况，并通过收发器2011向收发器1011返回用于反馈该数据包的情况的HARQ反馈信息。
若收发器1011接收到HARQ反馈信息时，基站支持的HARQ进程全部被使用，则处理器1012还可以用于：将数据包承载在第一HARQ进程的第二传输块，由收发器1011向收发器再次发送数据包。
如此，可以在基站接收到HARQ反馈消息时，全部HARQ进程被使用的情况下，通过HARQ进程中的未被使用的另一传输块来及 时发送数据包，使数据包得到及时调度，避免了资源浪费和整体性能损失的问题。
可选的，在收发器1011向收发器2011发送数据包之前，收发器1011还需要向收发器2011发送第一HARQ进程的调度信息，以使得处理器2012根据该调度信息确定本次发送数据包的是第一HARQ进程中的哪一个传输块，且该传输块采用的调制编码方案、冗余版本信息以及新数据指示是什么。具体的，在处理器1012将数据包承载在第一HARQ进程的第一传输块，通过收发器1011向收发器2011发送之前，处理器1012还可以用于：
将第一HARQ进程的第一调度信息封装在下行控制信息(Downlink Control Information，DCI)中，由收发器1011向收发器2011发送第一调度信息；第一调度信息包含：第一HARQ进程的进程号、第一HARQ进程的第一传输块的标识信息、以及第一HARQ进程的第一传输块的控制信息，第一HARQ进程的第一传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息；
处理器2012还可以用于：根据第一调度信息从第一HARQ进程的第一传输块接收数据包，并根据第一传输块的控制信息确定接收到的数据包的情况。
其中，第一HARQ进程的第一传输块的标识信息用于标识第一HARQ进程的第一传输块。
可选的，当收发器1011接收到HARQ反馈信息之后，处理器1012将数据包承载在第一HARQ进程的第二传输块，由收发器1011再次向收发器2011发送数据包之前，所述处理器1012还可以用于：
将第一HARQ进程的第二调度信息封装在DCI中，由收发器1011将向收发器2011发送第二调度信息；第二调度信息包含：第一HARQ进程的进程号、第一HARQ进程的第二传输块的标识信息、以及第一HARQ进程的第二传输块的控制信息，第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息；
处理器2012还可以用于：根据第二调度信息从第一HARQ进程的第二传输块接收数据包，并根据第二传输块的控制信息确定接收到的数据包的情况。
其中，第一HARQ进程的第二传输块的标识信息用于标识第一HARQ进程的第二传输块。
为了便于描述，以下实施例以步骤的形式示出并详细描述了数据传输方法的过程，其中，示出的步骤也可以在一组可执行指令的计算机系统中执行。此外，虽然在图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
图4为本发明实施例提供的一种数据传输方法的流程图，由图2所示的基站10和用户设备20交互执行；如图4所示，所述方法可以包括以下步骤：
S101：基站通过第一HARQ进程的第一传输块向用户设备发送数据包。
其中，基站支持的下行HARQ进程的个数可以为M个，M为不小于1的整数。
可选的，根据基站与用户设备间上下行配比的不同，基站所支持的下行HARQ进程的个数M可以是不同的，每个HARQ进程可以对应一个传输时间间隔(Transmit Time Interval，TTI)。具体的，表1为36.213协议规定的下行HARQ进程的个数：
表1
上下行配比 下行HARQ进程的个数
0 4
1 7
2 10
3 9
4 12
5 15
6 6
其中，M个HARQ进程中可以包含单码字调度的HARQ进程、双码字调度的HARQ进程，第一HARQ进程可以为M个HARQ进程中任意一个HARQ进程，第一传输块可以为第一HARQ进程所支持的任一传输块。
需要说明的是，单码字调度的HARQ进程可以指：仅通过一个传输块向用户设备发送数据包的HARQ进程，双码字调度的HARQ进程可以指：同时通过两个传输块向用户设备发送数据包的HARQ进程，由于，在目前的通信网络中，HARQ进程最多支持双码字调度，因此，本发明实施例仅以HARQ进程最多支持双码字调度为例进行说明，但可理解的是，随着通信技术的发展，HARQ进程还可以支持更多码字的调度，当HARQ进程支持大于两个码字的调度时，基站也可以采用本发明实施例提供的数据传输方法，通过与HARQ进程对应的大于两个的传输块向UE传输数据包。
S102：用户设备接收基站通过所述第一HARQ进程的第一传输块发送的数据包，并根据接收到的数据包的情况，向基站返回HARQ反馈消息；该HARQ反馈消息用于：反馈用户设备接收到的基站通过第一HARQ进程的第一传输块发送的数据包的情况。
其中，HARQ反馈消息可以为：肯定应答(Acknowledgement，ACK)消息，或者为否定应答(Negative Acknowledgement，NACK)。可选的，当用户设备接收到的数据包正确时，HARQ反馈消息为ACK消息，当用户设备接收到的数据包错误时，HARQ反馈消息为NACK消息。
具体的，用户设备可以根据HARQ进程的调度消息在相应HARQ进程的传输块上接收数据包，并根据该调度消息中的相关信息对接收到的数据包进行解调，确定解调出的数据包是正确的还是错误的，其中，HARQ进程的调度消息可以由基站通过物理下行控制信道(Physical Downlink Control Channel，PDCCH)中的下行控制信息DCI发送至用户设备，如：在基站通过第一HARQ进程的第一传输块向UE发送数据包之前，所述方法还可以包括：
基站通过DCI向UE发送第一HARQ进程的第一调度信息，第一调度信息包含：第一HARQ进程的进程号(HARQ process number)、第一HARQ进程的第一传输块的标识信息、以及第一HARQ进程的第一传输块的控制信息，第一HARQ进程的第一传输块的控制信息包含：调度编码方案(Modulation and coding scheme，MCS)、冗余版本号(Redundancy Version Number，RV)以及新数据包指示(New Data Indicator，NDI)信息；
相应的，在步骤S102中，用户设备可以根据第一调度信息从第一HARQ进程的第一传输块接收数据包，并根据第一传输块对应的控制信息，确定该数据包的情况。
其中，HARQ进程号，也可以称为HARQ进程标识(ID)，用于在不区分码字的情况下，唯一地指定一个HARQ进程。
第一HARQ进程的第一传输块的标识信息可以用于标识第一HARQ进程的第一传输块。
NDI值可以用1比特来表示，本发明对此并不限制，用于指示被调度的数据是新传还是重传，如果同一HARQ进程的NDI值与之前相比发生了变化，则表示当前传输是一个新的传输块的初传，否则，表示当前传输是同一个传输块的重传。
RV：用于指示传输块所使用的冗余版本，其取值范围为0～3。
MCS：用5比特的MCS索引(对应取值范围为0～31)来指示当前传输块所使用的调制编码方案，与资源块数共同决定本次传输的传输块的大小。
需要说明的是，在第一调度信息中未包含第二传输块的控制信息，或者，第一调度信息中包含第二传输块的控制信息，第二传输块的控制信息用于指示：第二传输块未被用于传输数据包，以便UE接收到第一控制信息后，直接从第一HARQ进程的第一传输块接收数据包。
可选的，基站可以根据DCI格式的不同将HARQ进程的调度信息写入DCI的相应字段中，例如，下表2示出了不同DCI格式下与 HARQ进程相关的字段：
表2
Figure PCTCN2016088001-appb-000001
其中，表2中Yes表示该DCI格式下的DCI中存在HARQ进程的调度信息，No表示该DCI格式下的DCI中不存在该信息，由图2可知，除了在DCI中格式中写入HARQ进程号外，DCI 1/1A/1B/1D中可写入与该HARQ进程相对应的第1个传输块的控制信息，即DCI1/1A/1B/1D可以用于在单码字调度中传输第1个TB的控制信息，DCI格式1C不支持HARQ进程，DCI 2/2A/2B/2C/2D中可以写入与该HARQ进程相对应的第1个TB和第2个TB的控制信息，即DCI2/2A/2B/2C/2D以用于在双码字调度中传输第1个TB和第2个TB的控制信息，由于，在实际应用中，若DCI 2/2A/2B/2C/2D中某TB对应的MCS的取值为0，且RV的取值为1，则表示该TB去使能，其中，TB去使能表示：该TB目前未被用于传输数据包，如此，可以在DCI 2/2A/2B/2C/2D中使某个TB去使能来实现单码字调度，如：可以使第2个TB去使能，仅传输第1个TB的控制信息，或者，可以使第1个TB去使能，仅传输第2个TB的控制信息。
可选的，用户设备根据第一传输块对应的控制信息，确定该数据包的情况，可以包括：
用户设备根据新数据指示信息确定数据包是初传还是重传；
若确定该数据包为初传，则利用冗余版本号对应的冗余比特， 根据控制信息中的调整编码方案对该数据包进行解调，根据解调结果确定该数据包正确或错误，如果正确，则将数据包送往高层，如果错误，则将数据包放入第一HARQ进程的第一传输块对应的软缓存区(soft buffer)中；
若确定该数据包为重传，则利用冗余版本号对应的冗余比特，根据控制信息中的调整编码方案对该数据包进行解调，将解调后的数据与第一HARQ进程的第一传输块对应的软缓存区中的数据进行软合并，根据合并后的结果确定该数据包正确或错误。
其中，软缓存区可以为用户设备预先划分的与每个HARQ进程对应的区域，用于将通过HARQ进程发送的数据包存入与该HARQ进程对应的区域中。例如，若基站最大支持10个HARQ进程，每个HARQ进程支持单码字调度，且单码字调度时可以选择双TB中的任一TB来发送数据包，因此，根据传输块的不同，可以将这10个HARQ进程扩展到20个HARQ进程，需要在用户设备侧划分出20个软缓存去与这20个HARQ进程相对应。
S103：基站接收HARQ反馈消息，若基站接收到HARQ反馈消息时，基站支持的HARQ进程已全部被使用，则基站根据HARQ反馈消息，通过第一HARQ进程的第二传输块向用户设备发送数据包。
可选的，若HARQ反馈消息为NACK消息，则基站可以通过第一HARQ进程的第二传输块向用户设备重传数据包；
若HARQ反馈消息为ACK消息，则基站可以通过第一HARQ进程的第二传输块向用户设备新传数据包，即重新传一新的数据包。
可理解的是，在本发明实施例的步骤S103中，首选的用第一HARQ进程的第二传输块(即未被使用的传输块)向用户设备发送数据包，除此之外，基站还可以用其他HARQ进程中未被使用的传输块传输数据包。
如此，可以通过HARQ进程中其他未被使用的传输块来及时发送数据包，以扩大原有HARQ进程的个数，避免在基站接收到HARQ反馈消息时，全部HARQ进程被使用的情况下，资源浪费和整体性 能损失的问题。
下面以基站最大支持10个HARQ进程：0～9HARQ，每个HARQ进程为单码字调度，每个HARQ进程最多支持双码字调度，且下行DCI采用表2所示的可用于指示双码字调度信息的DCI格式2/2A/2B/2C/2D中任一格式来指示单码字调度信息为例对上述过程进行举例说明：
在基站侧，可以采用0～9HARQ进程号及传输块1(TB1)来指示单码字调度的10个HARQ进程，采用0～9HARQ进程号及传输块2(TB2)来指示单码字调度的另外10个HARQ进程。
基站优先采用0～9HARQ进程号及TB1来指示单码字调度的HARQ进程的调度信息，字段内容可以如下所示：
HARQ process number-4bits(取值范围为0～9)
for transport block 1:
Modulation and coding scheme–5bits(取值范围为0～31)
Redundancy version–2bits(根据重传次数，依次为0/2/3/1或者0/3/2/1)
for transport block 2:
Modulation and coding scheme–5bits(取值为0)
Redundancy version–2bits(取值为1)
上述字段说明，当前单码字调度中TB1被用来传输数据包，而TB2未被用来传输数据包。
0～9HARQ进程号及TB1指示的10个HARQ进程用完后，再采用0～9HARQ进程号及TB2来指示另外10个单码字调度的HARQ进程，其与调度信息有关的字段内容可以如下所示：
HARQ process number-4bits(取值范围为0～9)
for transport block 1:
Modulation and coding scheme–5bits(取值为0)
Redundancy version–2bits(取值为1)
for transport block 2:
Modulation and coding scheme–5bits(取值范围为0～31)
Redundancy version–2bits(根据重传次数，依次为0/2/3/1或者0/3/2/1)
上述字段说明，当前单码字调度中TB2被用来传输数据包，而TB1未被用来传输数据包。
在终端侧，当读取到TB1被用来传输数据包，而TB2未被用来传输数据包的调度信息后，则根据调度信息中的HARQ进程号将接收到的数据存入与该HARQ进程对应的前10个soft buffer里面，如：HARQ进程号为0的数据存入0号soft buffer里面，HARQ进程号为1的数据存入1号soft buffer里面，依次内推，直到将HARQ进程号为9的数据存入9号soft buffer里面。
当读取到TB1未被用来传输数据包，TB2被用来传输数据包的调度信息后，根据调度信息中的HARQ进程号将接收到的数据存入对应的后10个soft buffer里面，如：将HARQ进程号为0的数据存入10号soft buffer里面，将HARQ进程号为1的数据存入11号soft buffer里面，依次内推，直到将HARQ进程号为9的数据存入19号soft buffer里面。
终端侧如果解调正确，则反馈ACK，并将对应soft buffer的数据传向高层；基站侧如果接收到ACK，则可用使用相同的HARQ进程号及TB调度信息来调度下一个新传数据。如果解调失败，则反馈NACK，等待基站侧的重传到达后与soft buffer中的数据进行合并，以得到重传合并增益；基站侧重传时使用相同的HARQ进程号及TB调度信息。
可理解的是，与上述例子不同的是，基站也可以优先采用0～9HARQ进程号及TB2来指示10个HARQ进程，当这10个HARQ进程全部被使用后，再采用0～9HARQ进程号及TB1来指示另外10个HARQ进程，其中，每个HARQ进程的传输块的调度过程与上述相同，在此不再详细赘述。
由上可知，本发明实施例提供一种数据传输方法，基站通过第 一HARQ进程的第一传输块向用户设备UE发送数据包，并接收UE返回的HARQ反馈消息，若基站接收到HARQ反馈消息时，基站支持的M个HARQ进程已全部被使用，则基站根据HARQ反馈消息，通过第一HARQ进程的第二传输块向UE发送数据包。如此，可以通过HARQ进程中的另一未被使用的传输块来及时发送数据包，以扩大原有HARQ进程的个数，避免了在基站接收到HARQ反馈消息时，全部HARQ进程被使用导致的资源浪费和整体性能损失的问题。
下面本发明实施例还提供一种基站，优选的，该基站用于实现上述方法中基站所执行的过程。
图5为本发明实施例提供的一种基站30的结构图，如图5所示，所述基站30可以包括：
发送单元301，用于通过第一HARQ进程的第一传输块向用户设备UE发送数据包。
接收单元302，用于接收所述UE返回的HARQ反馈消息，所述HARQ反馈消息用于：反馈所述UE接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况。
所述发送单元301，还用于若所述接收单元302接收到所述HARQ反馈消息时，所述基站支持的HARQ进程已全部被使用，则根据所述HARQ反馈消息，通过所述第一HARQ进程的第二传输块向所述UE发送数据包。
可选的，在发送单元301通过第一HARQ进程的第一传输块向UE发送数据包之前，发送单元301还可以通过下行控制信息DCI向UE发送所述第一HARQ进程的第一调度信息，以使所述UE知道是从第一HARQ进程的哪个传输块发送数据包，并根据第一调度信息从所述第一HARQ进程的相应传输块接收数据包，并确定接收到的数据包的情况。
其中，所述第一调度信息可以包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第一传输块的标识信息、以及所述第一HARQ进程的第一传输块的控制信息，所述第一HARQ进程的第 一传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
需要说明的是，在第一调度信息中未包含第二传输块的控制信息，或者，第一调度信息中包含第二传输块的控制信息，第二传输块的控制信息用于指示：第二传输块未被用于传输数据包，以便UE接收到第一控制信息后，直接从第一HARQ进程的第一传输块接收数据包。
同样可选的，在所述发送单元301通过所述第一HARQ进程的第二传输块向所述UE发送数据包之前，所述发送单元301也需要通过DCI向UE发送所述第一HARQ进程的第二调度信息，以使UE根据第二调度信息，从第二调度信息所指示的传输块接收数据包，并确定接收到的数据包的情况。
其中，所述第二调度信息可以包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第二传输块的标识信息、以及所述第一HARQ进程的第二传输块的控制信息，所述第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
可理解的是，在第二调度信息中不包含所述第一传输块的控制信息，或者，第二调度信息中包含所述第一传输块的控制信息，但第一传输块的控制信息用于指示：第一传输块未被用来传输数据块，以便UE接收到第二控制信息后，直接从第一HARQ进程的第二传输块接收数据包。
需要说明的是，图5所示基站30中的接收单元302、发送单元301可以集成为图3所示基站10中的收发器1011。
由上可知，本发明实施例提供一种基站，通过第一HARQ进程的第一传输块向用户设备UE发送数据包，并接收UE返回的HARQ反馈消息，若接收到HARQ反馈消息时，基站支持的HARQ进程已全部被使用，则根据HARQ反馈消息，通过第一HARQ进程的第二传输块向UE发送数据包。如此，可以通过HARQ进程中的另一未 被使用的传输块来及时发送数据包，以扩大原有HARQ进程的个数，避免了在基站接收到HARQ反馈消息时，全部HARQ进程被使用导致的资源浪费和整体性能损失的问题。
下面本发明实施例还提供一种用户设备，优选的，该用户设备用于实现方法步骤中UE所执行的过程。
图6为本发明实施例提供的一种用户设备40的结构图，如图6所示，所述用户设备40可以包括：
接收单元401，用于接收基站通过第一HARQ进程的第一传输块发送的数据包。
处理单元402，用于确定所述接收单元401接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况。
发送单元403，用于向所述基站返回HARQ反馈消息，所述HARQ反馈消息用于：反馈所述处理单元402确定出的所述接收单元401接收到的数据包的情况。
所述接收单元401，还用于若所述基站接收到所述HARQ反馈消息时，所述基站支持的HARQ进程已全部被使用，则接收所述基站根据所述HARQ反馈消息，通过所述第一HARQ进程的第二传输块向所述UE发送的数据包。
可选的，在所述接收单元401接收基站通过第一HARQ进程的第一传输块发送数据包之前，接收单元401，还可以用于：
接收所述基站通过下行控制信息DCI发送的所述第一HARQ进程的第一调度信息；所述第一调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第一传输块的标识信息、以及所述第一HARQ进程的第一传输块的控制信息，所述第一HARQ进程的第一传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息；
所述处理单元402，具体用于：根据所述第一调度信息从所述第一HARQ进程的第一传输块接收数据包，并确定接收到的数据包的情况。
可选的，在所述接收单元401接收所述基站通过所述第一HARQ进程的第二传输块向所述UE发送的数据包之前，接收单元401，还可以用于：
接收所述基站通过DCI向所述UE发送的所述第一HARQ进程的第二调度信息，所述第二调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第二传输块的标识信息、以及所述第一HARQ进程的第二传输块的控制信息，所述第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
需要说明的是，图6中的用户设备40中的接收单元401、发送单元403可以为图2所示用户设备20中的收发器2011，处理单元402可以为图2中独立的处理器2012，也可以集成在用户设备20的某一个处理器2012中实现，此外，也可以以程序代码的形式存储于用户设备20的存储器2013中，由用户设备20的某一个处理器2012调用并执行以上处理单元402的功能。这里所述的处理器可以是一个CPU，或者是ASIC，或者是被配置成实施本发明实施例的一个或多个集成电路。
由上可知，本发明实施例提供一种用户设备，接收基站通过第一HARQ进程的第一传输块向用户设备UE发送数据包，向基站返回的HARQ反馈消息，若基站接收到HARQ反馈消息时，基站支持的HARQ进程已全部被使用，则用户设备UE接收基站根据HARQ反馈消息，通过第一HARQ进程的第二传输块向UE发送数据包。如此，可以通过HARQ进程中的另一未被占用使用的传输块来及时发送数据包，以扩大原有HARQ进程的个数，避免了在基站接收到HARQ反馈消息时，全部HARQ进程被使用导致的资源浪费和整体性能损失的问题。
图7为本发明实施例提供一种数据传输系统的结构图，如图7所示，所述系统可以包括：基站30、至少一个用户设备40；
其中，基站30与图5所述基站的功能相同，用户设备40与图 6所示用户设备的功能相同，在此不再一一赘述。
由上可知，本发明实施例提供一种数据传输系统，基站通过第一HARQ进程的第一传输块向用户设备UE发送数据包，并接收UE返回的HARQ反馈消息，若基站接收到HARQ反馈消息时，基站支持的HARQ进程已全部被使用，则基站根据HARQ反馈消息，通过第一HARQ进程的第二传输块向UE发送数据包。如此，可以通过HARQ进程中的另一未被使用的传输块来及时发送数据包，以扩大原有HARQ进程的个数，避免了在基站接收到HARQ反馈消息时，全部HARQ进程被使用导致的资源浪费和整体性能损失的问题。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (20)

  1. 一种数据传输方法，其特征在于，所述方法包括：
    基站通过第一HARQ进程的第一传输块向用户设备UE发送数据包；
    所述基站接收所述UE返回的HARQ反馈消息，所述HARQ反馈消息用于：反馈所述UE接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况；
    若所述基站接收到所述HARQ反馈消息时，所述基站支持的HARQ进程的进程已全部被使用，则所述基站根据所述HARQ反馈消息，通过所述第一HARQ进程的第二传输块向所述UE发送数据包。
  2. 根据权利要求1所述的方法，其特征在于，在所述基站通过第一HARQ进程的第一传输块向UE发送数据包之前，所述方法还包括：
    所述基站通过下行控制信息DCI向所述UE发送所述第一HARQ进程的第一调度信息，以使得所述UE根据所述第一调度信息从所述第一HARQ进程的第一传输块接收数据包，并确定接收到的数据包的情况；
    所述第一调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第一传输块的标识信息、以及所述第一HARQ进程的第一传输块的控制信息，所述第一HARQ进程的第一传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
  3. 根据权利要求2所述的方法，其特征在于，
    在所述第一调度信息中未包含所述第二传输块的控制信息；
    或者，所述第一调度信息中包含所述第二传输块的控制信息，所述第二传输块的控制信息用于指示：所述第二传输块未被用于传输数据包。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，在所述基站通过所述第一HARQ进程的第二传输块向所述UE发送数据包之前，所述方法还包括：
    所述基站通过DCI向所述UE发送所述第一HARQ进程的第二调度信息，以使得所述UE根据所述第二调度信息从所述第一HARQ进程的第二传输块接收数据包，并确定接收到的数据包的情况；
    所述第二调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第二传输块的标识信息、以及所述第一HARQ进程的第二传输块的控制信息，所述第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
  5. 根据权利要求4所述的方法，其特征在于，
    在所述第二调度信息中未包含所述第一传输块的控制信息；
    或者，所述第二调度信息中包含所述第一传输块的控制信息，所述第一传输块的控制信息用于指示：所述第一传输块未被用于传输数据包。
  6. 一种数据传输方法，其特征在于，所述方法包括：
    用户设备UE接收基站通过第一HARQ进程的第一传输块发送的数据包；
    所述UE确定接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况，并向所述基站返回HARQ反馈消息，所述HARQ反馈消息用于：反馈所述UE接收到的数据包的情况；
    若所述基站接收到所述HARQ反馈消息时，所述基站支持的HARQ进程已全部被使用，则所述UE接收所述基站根据所述HARQ反馈消息，通过所述第一HARQ进程的第二传输块向所述UE发送的数据包。
  7. 根据权利要求6所述的方法，其特征在于，在所述UE接收基站通过第一HARQ进程的第一传输块发送的数据包之前，所述方法还包括：
    所述UE接收所述基站通过下行控制信息DCI发送的所述第一HARQ进程的第一调度信息；所述第一调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第一传输块的标识信息、以及所述第一HARQ进程的第一传输块的控制信息，所述第一HARQ进 程的第一传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息；
    所述UE确定接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况包括：
    所述UE根据所述第一调度信息从所述第一HARQ进程的第一传输块接收数据包，并确定接收到的数据包的情况。
  8. 根据权利要求7所述的方法，其特征在于，
    在所述第一调度信息中未包含所述第二传输块的控制信息；
    或者，所述第一调度信息中包含所述第二传输块的控制信息，所述第二传输块的控制信息用于指示：所述第二传输块未被用于传输数据包。
  9. 根据权利要求6-8任一项所述的方法，其特征在于，在所述UE接收所述基站通过所述第一HARQ进程的第二传输块向所述UE发送的数据包之前，所述方法还包括：
    所述UE接收所述基站通过DCI发送的所述第一HARQ进程的第二调度信息，所述第二调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第二传输块的标识信息、以及所述第一HARQ进程的第二传输块的控制信息，所述第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
  10. 根据权利要求9所述的方法，其特征在于，
    在所述第二调度信息中未包含所述第一传输块的控制信息；
    或者，所述第二调度信息中包含所述第一传输块的控制信息，所述第一传输块的控制信息用于指示：所述第一传输块未被用于传输数据包。
  11. 一种基站，其特征在于，所述基站包括：
    发送单元，用于通过第一HARQ进程的第一传输块向用户设备UE发送数据包；
    接收单元，用于接收所述UE返回的HARQ反馈消息，所述HARQ 反馈消息用于：反馈所述UE接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况；
    所述发送单元，还用于若所述接收单元接收到所述HARQ反馈消息时，所述基站支持的HARQ进程已全部被使用，则根据所述HARQ反馈消息，通过所述第一HARQ进程的第二传输块向所述UE发送数据包。
  12. 根据权利要求11所述的基站，其特征在于，所述发送单元，还用于：
    在所述发送单元通过第一HARQ进程的第一传输块向UE发送数据包之前，通过下行控制信息DCI向UE发送所述第一HARQ进程的第一调度信息，以使得所述UE根据所述第一调度信息从所述第一HARQ进程的第一传输块接收数据包，并确定接收到的数据包的情况；
    所述第一调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第一传输块的标识信息、以及所述第一HARQ进程的第一传输块的控制信息，所述第一HARQ进程的第一传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
  13. 根据权利要求12所述的基站，其特征在于，
    在所述第一调度信息中未包含所述第二传输块的控制信息；
    或者，所述第一调度信息中包含所述第二传输块的控制信息，所述第二传输块的控制信息用于指示：所述第二传输块未被用于传输数据包。
  14. 根据权利要求11-13任一项所述的基站，其特征在于，所述发送单元，还用于：
    在所述发送单元通过所述第一HARQ进程的第二传输块向所述UE发送数据包之前，通过DCI向UE发送所述第一HARQ进程的第二调度信息，以使得所述UE根据所述第二调度信息从所述第一HARQ进程的第二传输块接收数据包，并确定接收到的数据包的情况；
    所述第二调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第二传输块的标识信息、以及所述第一HARQ进程的第二传输块的控制信息，所述第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
  15. 根据权利要求14所述的基站，其特征在于，
    在所述第二调度信息中未包含所述第一传输块的控制信息；
    或者，所述第二调度信息中包含所述第一传输块的控制信息，所述第一传输块的控制信息用于指示：所述第一传输块未被用于传输数据包。
  16. 一种用户设备UE，其特征在于，所述UE包括：
    接收单元，用于接收基站通过第一HARQ进程的第一传输块发送的数据包；
    处理单元，用于确定所述接收单元接收到的所述基站通过所述第一HARQ进程的第一传输块发送的数据包的情况；
    发送单元，用于向所述基站返回HARQ反馈消息，所述HARQ反馈消息用于：反馈所述处理单元确定出的所述接收单元接收到的数据包的情况；
    所述接收单元，还用于若所述基站接收到所述HARQ反馈消息时，所述基站支持的HARQ进程已全部被使用，则接收所述基站根据所述HARQ反馈消息，通过所述第一HARQ进程的第二传输块向所述UE发送的数据包。
  17. 根据权利要求16所述的UE，其特征在于，所述接收单元，还用于：
    在所述接收单元接收基站通过第一HARQ进程的第一传输块发送的数据包之前，接收所述基站通过下行控制信息DCI向所述UE发送的所述第一HARQ进程的第一调度信息；所述第一调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第一传输块的标识信息、以及所述第一HARQ进程的第一传输块的控制信息，所述第一HARQ进程的第一传输块的控制信息包含：调度编码方案、冗 余版本号以及新数据包指示信息；
    所述处理单元，用于根据所述第一调度信息从所述第一HARQ进程的第一传输块接收数据包，并确定接收到的数据包的情况。
  18. 根据权利要求17所述的UE，其特征在于，
    在所述第一调度信息中未包含所述第二传输块的控制信息；
    或者，所述第一调度信息中包含所述第二传输块的控制信息，所述第二传输块的控制信息用于指示：所述第二传输块未被用于传输数据包。
  19. 根据权利要求16-18任一项所述的UE，其特征在于，所述接收单元，还用于：
    在所述接收单元接收所述基站通过所述第一HARQ进程的第二传输块向所述UE发送的数据包之前，接收所述基站通过DCI向所述UE发送的所述第一HARQ进程的第二调度信息；
    所述第二调度信息包含：所述第一HARQ进程的进程号、所述第一HARQ进程的第二传输块的标识信息、以及所述第一HARQ进程的第二传输块的控制信息，所述第一HARQ进程的第二传输块的控制信息包含：调度编码方案、冗余版本号以及新数据包指示信息。
  20. 根据权利要求19所述的UE，其特征在于，
    在所述第二调度信息中未包含所述第一传输块的控制信息；
    或者，所述第二调度信息中包含所述第一传输块的控制信息，所述第一传输块的控制信息用于指示：所述第一传输块未被用于传输数据包。
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