WO2017133285A1 - 非授权载波上行数据的发送方法及终端 - Google Patents

非授权载波上行数据的发送方法及终端 Download PDF

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Publication number
WO2017133285A1
WO2017133285A1 PCT/CN2016/104756 CN2016104756W WO2017133285A1 WO 2017133285 A1 WO2017133285 A1 WO 2017133285A1 CN 2016104756 W CN2016104756 W CN 2016104756W WO 2017133285 A1 WO2017133285 A1 WO 2017133285A1
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WIPO (PCT)
Prior art keywords
harq process
terminal
uplink
uplink grant
information
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PCT/CN2016/104756
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English (en)
French (fr)
Inventor
陈中明
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中兴通讯股份有限公司
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Publication of WO2017133285A1 publication Critical patent/WO2017133285A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1806—Go-back-N protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications, and in particular to a method and a terminal for transmitting uplink data of an unlicensed carrier.
  • a user equipment In a Long Term Evolution (LTE) system, a user equipment (UE) needs to transmit data on a Physical Uplink Shared CHannel (PUSCH) (in addition to non-adaptive retransmission), and needs to obtain a valid uplink grant allocated by the base station.
  • the uplink grant indication may be dynamically configured on a physical downlink control channel (PDCCH, Physical Downlink Control CHannel) or a random access response, or may be semi-statically configured.
  • the uplink grant indication includes at which time and on which carrier the terminal can transmit data and The modulation coding scheme used, and the like. After obtaining the uplink grant indication allocated by the base station, the terminal may send uplink data on the specified time-frequency domain resource.
  • the Medium Access Control (MAC) layer needs to obtain related Hybrid Automatic Repeat ReQuest (HARQ) information from the physical layer.
  • HARQ Hybrid Automatic Repeat ReQuest
  • TTI Transmission Time Interval
  • the HARQ entity determines a HARQ process for the transmission to occur.
  • the HARQ entity also sends the HARQ feedback Acknowledgement/Negative Acknowledgement (ACK/NACK) information, Modulation and Coding Scheme (MCS) information and resource information received from the physical layer to the corresponding HARQ process.
  • ACK/NACK HARQ feedback Acknowledgement/Negative Acknowledgement
  • MCS Modulation and Coding Scheme
  • Each HARQ process corresponds to a HARQ buffer.
  • the synchronous transmission mode is generally adopted.
  • the terminal retransmits the data packet in a fixed place relative to the HARQ process that first transmits the data packet.
  • CA Carrier Aggregation
  • the UE After the UE enters the connected state, it can simultaneously communicate with the source base station through multiple component carriers (such as CC1 and CC2).
  • the configuration of the type or the primary component carrier (PCC) is assigned to the UE according to the protocol.
  • the other component carriers are called the secondary component carrier (SCC), and the serving cell on the PCC is called the primary serving cell.
  • Primary Cell, Pcell the serving cell on the SCC is called a secondary cell (Scell).
  • Unlicensed carrier refers to the spectrum or carrier that can be used directly without authorization, subject to the relevant regulations (radio control) of government agencies (such as the National Radio Regulatory Commission). For example, microwave ovens, remote-controlled toy airplanes, wireless mice, wireless keyboards, wireless fidelity (WiFi), etc. all use unlicensed carriers. In some cases, unlicensed carriers need to compete to be used.
  • the unlicensed carrier cannot be used.
  • the unlicensed carrier and the authorized carrier can be used in the form of carrier aggregation.
  • the unlicensed carrier is generally used as a supplement to the data transmission, that is, the authorized carrier is used as the primary serving cell, and the unlicensed carrier is used as the secondary serving cell.
  • the unlicensed carrier resource has a special feature.
  • the terminal retransmits the fixed time interval with respect to the HARQ process that first transmitted the data packet.
  • the data packet will make the delay of sending the uplink data uncontrollable, and it is prone to abnormal conditions, so it takes a long time to send successfully, and these situations will cause the problem of packet loss.
  • the embodiment of the present invention provides a method and a terminal for transmitting an unlicensed carrier uplink data to solve at least one problem in the prior art, and adopts an asynchronous transmission manner of uplink data in an unlicensed carrier scenario to solve the problem.
  • the delay in data transmission is uncontrollable, and it is prone to abnormal conditions, which causes packet loss.
  • an embodiment of the present invention provides a method for transmitting uplink data of an unlicensed carrier, where the method includes:
  • the terminal acquires state information of the first HARQ process according to the identifier information of the HARQ process, where the state information of the HARQ process includes at least whether the NDI value in the first HARQ process is reversed, and whether the buffer area of the first HARQ process is air;
  • the terminal acquires time-frequency domain information of the contending resources
  • the terminal determines to perform retransmission, the terminal retransmits the uplink data previously transmitted on the resource corresponding to the time-frequency domain information by using the first HARQ process, or the terminal utilizes the second HARQ
  • the first HARQ process with different processes retransmits the uplink data sent before the second HARQ process on the resource corresponding to the time-frequency domain information.
  • an embodiment of the present invention provides a terminal, where the terminal includes a receiving unit, a first acquiring unit, a determining unit, a second acquiring unit, and a retransmission unit, where:
  • the receiving unit is configured to receive an uplink authorization indication sent by the base station, where the uplink authorization indication includes at least identifier information of the first HARQ process;
  • the first acquiring unit is configured to acquire the first HARQ process according to the identifier information of the HARQ process.
  • Status information the status information of the HARQ process includes at least whether the NDI value in the first HARQ process is reversed, and whether the buffer area of the first HARQ process is empty;
  • the first determining unit is configured to determine whether to perform retransmission or new transmission according to the uplink authorization indication and/or status information of the first HARQ process;
  • the second obtaining unit is configured to acquire time-frequency domain information of the contending resources
  • the retransmission unit is configured to: when the terminal determines to perform retransmission, the terminal uses uplink data sent before retransmission on a resource corresponding to the time-frequency domain information by using the first HARQ process, or The terminal retransmits the uplink data sent before the second HARQ process on the resource corresponding to the time-frequency domain information by using a first HARQ process that is different from the second HARQ process.
  • the method for transmitting an unlicensed carrier uplink data and the terminal provided by the embodiment of the present invention, wherein the terminal receives an uplink grant indication sent by the base station, where the uplink grant indication includes at least identifier information of the first HARQ process; Obtaining, by the identifier information of the HARQ process, the status information of the first HARQ process, where the status information of the HARQ process includes at least whether the NDI value in the first HARQ process is reversed, and whether the buffer area of the first HARQ process is empty; Determining, by the terminal, whether to perform retransmission or new transmission according to the uplink authorization indication and/or status information of the first HARQ process; the terminal acquiring time-frequency domain information of the contending resource; if the terminal determines to perform retransmission Transmitting, by the first HARQ process different from the second HARQ process, the uplink data sent before the second HARQ process on the resource corresponding to the time-frequency domain information; thus, the unlicensed carrier
  • 1 is a schematic diagram of transmitting uplink data in the related art
  • FIG. 2 is a schematic diagram of sending uplink data in an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of an implementation process of an unlicensed carrier uplink data sending method according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a terminal of a terminal according to an embodiment of the present invention.
  • the terminal receives the PDCCH sent by the base station, and if the PDCCH includes the uplink grant indication, the terminal determines the HARQ process number according to the subframe in which the uplink grant indication is received, and acquires the HARQ process.
  • the status information is determined by the terminal according to the uplink authorization indication and the status information of the HARQ process, whether to trigger a retransmission (re-transmission of a previously transmitted data packet) or trigger a new transmission (a one that has not been sent before)
  • the first transmission of the data packet wherein the status information of the HARQ process includes at least: an NDI value in a previous transmission of the HARQ process, a buffer status of the HARQ process, where the buffer status includes whether the buffer is empty and NULL.
  • the uplink grant indication is not in the cell radio network temporary identity (T-CRNTI, Temporary Cell Radio Network Temporary Identifier), and if the new data indicator (NDI, New Data Indicator) in the relevant HARQ information is reversed compared to the value in the previous transmission of the HARQ process, or if the uplink grant indication is in the cell In the PDCCH identified by the C-RNTI (Cell Radio Network Temporary Identity), and the buffer of the HARQ process is empty (ie, the data in the buffer is empty), or if the uplink grant indication is random In the access response, the corresponding HARQ process is notified to trigger a new transmission; otherwise, if the above new transmission trigger condition is not met, the corresponding HARQ process is notified to trigger an adaptive retransmission.
  • T-CRNTI Temporary Cell Radio Network Temporary Identifier
  • NDI New Data Indicator
  • the uplink grant indicates that the value in the previous transmission of the HARQ process has not been reversed in the PDCCH identified by the T-CRNTI or if the NDI in the relevant HARQ information is not compared, or if the uplink grant indication is not in the C- of the cell
  • the buffer of the RNTI or the buffer of the HARQ process is not empty (that is, the data in the buffer is not empty), or if the uplink grant indication is not in the random access response, the corresponding HARQ process is triggered to be triggered once.
  • Adaptive retransmission e.g., Adaptive retransmission.
  • the buffer of the HARQ process corresponding to the TTI is not empty (the data in the buffer is not empty), and the corresponding HARQ process is notified to trigger a non-adaptive retransmission;
  • the buffer of the corresponding HARQ process is processed.
  • the data or the data packet is saved in the buffer; only the acknowledgement (ACK) information is received, and the buffer is not processed.
  • the buffer is cleared.
  • the embodiment of the present invention introduces an asynchronous transmission mode or method of the uplink data in the unlicensed carrier scenario, that is, the PDCCH carries the HARQ process ID. Scheduling is performed, and retransmission is always scheduled through the PDCCH.
  • Retransmission refers to the transmission of a packet that has been sent before
  • New transmission refers to the first transmission of a packet that has not been sent before
  • the synchronous transmission mode of the uplink data in the unlicensed carrier scenario in the related art that is, the time interval between the subframe in which the terminal receives the uplink grant indication and the uplink data is sent, and the time between when the terminal sends the uplink data and the corresponding response.
  • the interval is fixed. Referring to FIG. 1, in the related art, if a terminal receives an uplink grant indication of a base station at a time of subframe 0, the terminal is always a subframe with a subframe interval of 4 from a subframe timing at which an uplink grant indication is received.
  • the uplink data is sent on the subframe number of 4; the terminal will receive a response message (such as NACK information) in the subframe (subframe number 8) with the subframe interval of 4 from the subframe in which the uplink data is sent, if the terminal is in
  • a response message such as NACK information
  • subframe number 8 the subframe number 8
  • the retransmission is performed, and the terminal is always in the fixed subframe from the subframe in which the NACK information is received.
  • Retransmission is performed on a subframe with an interval of 4 (subframe number is 12).
  • the terminal receives the PDCCH sent by the base station, and includes an uplink grant indication, where the uplink grant indication carries the identifier information of the HARQ process, and the terminal determines the state information of the HARQ process according to the identifier information of the HARQ process, and the terminal at least according to the uplink authorization Instructing and status information of the HARQ process to determine whether to trigger a retransmission or trigger a new transmission.
  • the NDI in the relevant HARQ information is reversed compared to the value in the previous transmission of the HARQ process, or If the uplink grant indication is in the PDCCH identified by the C-RNTI and the buffer of the HARQ process is empty (the data in the buffer is empty), or if the HARQ process or transport block (TB, Transport Block) is the first Receiving the uplink scheduling at a time, that is, there is no data of any NDI before, or if the uplink grant indication is in the random access response, the corresponding HARQ process is notified to trigger a new transmission; otherwise, the new transmission trigger condition is not met. In the case, the corresponding HARQ process is notified to trigger a retransmission.
  • the NDI in the relevant HARQ information is not reversed compared to the value in the previous transmission of the HARQ process, or if the uplink grant indication is not in the PDCCH identified by the C-RNTI or the buffer of the HARQ process is not empty ( The data in the buffer is not empty, or if the HARQ process or TB is not receiving the uplink scheduling for the first time (that is, the data of the previous NDI), or if the uplink authorization indication is not in the random access response, Then notify the corresponding HARQ process to trigger a retransmission.
  • the retransmission and the new transmission may use the same HARQ process or different HARQ processes. It should be noted that when the same HARQ process is adopted, the terminal transmits the HARQ of the data packet for the first time.
  • the variable time interval (same subframe) of the process retransmits the data packet; referring to FIG.
  • the terminal may If the subframe number is 5 (which may be a new transmission time and the subframe in which the uplink grant indication is received is not a fixed interval, and the interval is indicated in the uplink grant indication), the new transmission is performed; if the terminal receives the subframe number 8 An uplink grant indication to the base station, if the terminal determines For retransmission, the terminal performs retransmission on the subframe number of 14 (which may be a retransmission time and a subframe that receives the uplink grant indication is not a fixed interval, or indicates the interval in the uplink grant indication). It can be seen that in the embodiment of the present invention, the subframe intervals of the new transmission and the retransmission are different.
  • the RV is used to indicate different versions of the transmitted data to be merged when receiving data according to the version.
  • the time interval for sending in the embodiment of the present invention is not fixed. That is, the embodiment of the present invention uses the variable time interval to send uplink data, which has an important impact on solving the technical problem.
  • the interval in the related art is fixed, if the time is fixed. If no resources can be used for retransmission or new transmission, the next fixed interval can be used for transmission. However, in the embodiment of the present invention, the interval is not fixed, and the information can be sent when there is a resource.
  • retransmissions and new transmissions may also employ fixed intervals in the related art.
  • the ACK information and the ACK play an important role in retransmission. In the embodiment of the present invention, there will be no more ACK information and NACK, and whether the terminal retransmits is determined according to the information shown in Table 1.
  • the processing for the corresponding buffer is such that each HARQ process corresponds to a buffer
  • Method 1 When the new transmission, save the data to the buffer, and then overwrite the data with the new transmission next time, which is equivalent to clearing the original buffer and saving the new data.
  • Method 2 When receiving the retransmission schedule, the retransmission and the new transmission are not the same HARQ process, and the data that needs to be retransmitted is transferred to the buffer of the HARQ process for retransmission.
  • the base station needs to notify the result of the competition of the terminal resources, and includes the time-frequency domain information of the contending resources. Or, the buffer is reserved, and the timer is set (set in units of unlicensed carriers). After a certain period of time, no new uplink authorization indication is received, and all buffers are cleared.
  • the embodiment of the present invention provides a method for transmitting uplink data of an unlicensed carrier, which is applied to a terminal, and the function implemented by the method can be implemented by using a processor in the terminal to call a program code, of course.
  • the program code can be stored in a computer storage medium.
  • the terminal includes at least a processor and a storage medium.
  • FIG. 3 is a schematic flowchart of a method for transmitting uplink data of an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • Step S101 The terminal receives an uplink grant indication sent by the base station, where the uplink grant indication includes at least identifier information of the first HARQ process.
  • the first HARQ process should be a process of processing an authorized resource, that is, a new HARQ process indicated by the base station in the uplink grant indication.
  • Step S102 The terminal acquires state information of the first HARQ process according to the identifier information of the HARQ process.
  • the status information of the first HARQ process includes at least an NDI value in the first HARQ process, and the first The buffer status of the HARQ process;
  • Step S103 The terminal determines whether to perform retransmission or new transmission according to the uplink authorization indication and/or the status information of the first HARQ process.
  • step S103 determines whether to perform retransmission or new transmission according to Table 1.
  • Step S104 the terminal acquires time-frequency domain information of the contending resources
  • Step S105 if the terminal determines to perform retransmission, the terminal retransmits the uplink data sent before the first HARQ process buffer on the resource corresponding to the time-frequency domain information by using the first HARQ process, Or the terminal retransmits the uplink data sent before the second HARQ process on the resource corresponding to the time-frequency domain information by using a first HARQ process that is different from the second HARQ process.
  • the second HARQ process may be determined in a specific implementation process, where the terminal determines, according to information in the uplink grant indication, a second HARQ process that is different from the first HARQ process.
  • the terminal uses the first HARQ process to newly transmit an uplink data packet on the resource corresponding to the time-frequency domain information.
  • the retransmission and the new transmission use the same HARQ process, but the retransmission and the new transmission sub-frame interval are different. Only the identification information of the first HARQ process is included.
  • the terminal uses the first HARQ process. The data in the second HARQ process buffer is retransmitted, and the data of the original second HARQ process is saved in the buffer of the first HARQ process.
  • mode 2 for example, the uplink data is sent before using HARQ process 1 (ie, the second HARQ process), and the retransmission is performed using HARQ process 2 (ie, the first HARQ process).
  • the method when retransmission is performed by using the first HARQ process, the method further includes:
  • Step S106 the terminal moves the uplink data of the buffer corresponding to the second HARQ process to the buffer corresponding to the first HARQ process;
  • Step S107 If the resource is used up, the terminal clears the buffer corresponding to all processes on the carrier, regardless of whether the data is completely transmitted.
  • the method before the terminal receives the uplink grant indication sent by the base station, the method further includes: the terminal performing carrier aggregation of the unlicensed carrier and the authorized carrier; or, the terminal completing the non- A dual connection between the cell of the licensed carrier and the cell of the licensed carrier.
  • the terminal and the base station may perform resource competition on the unlicensed carrier.
  • the method further includes: the terminal performing on the unlicensed carrier.
  • Resource competition the time-frequency domain information of the contending resource is sent to the base station, and then the base station sends an uplink grant indication to the terminal.
  • the terminal acquires time-frequency domain information of the contending resource, including: The terminal obtains time-frequency domain information of the resource from the uplink authorization indication.
  • the method further includes: performing, by the base station, resource competition on the unlicensed carrier, and carrying the time-frequency domain information that competes to the resource in the uplink authorization indication, and sending the At this time, in step S104, the terminal acquires time-frequency domain information of the contending resource, and the terminal obtains time-frequency domain information of the resource from the uplink authorization indication.
  • the terminal determines whether to perform retransmission or new transmission according to the uplink authorization indication and/or the status information of the first HARQ process, including:
  • the uplink grant indication is in C - the PDCCH identified by the RNTI and the buffer of the first HARQ process is empty, or if the first HARQ process or transport block receives the scheduling of the uplink grant indication for the first time, or if the uplink grant indication is random In the access response, it is determined to be a new transmission;
  • the uplink grant indication is not in the C-
  • the buffer of the RNTI identifier or the first HARQ process is not empty, or if the first HARQ process or the transport block is not the first time to receive the uplink grant indication, or if the uplink grant indication is not In the random access response, it is determined to be a retransmission.
  • the subframe interval retransmitted by the first HARQ process is different from the newly transmitted subframe interval of the first HARQ process, where a sub-frame is different.
  • the frame interval refers to the interval between a subframe that receives an uplink grant indication and a retransmitted or newly transmitted subframe.
  • the base station has two cells, a cell 1 and a cell 3.
  • the cell 1 uses an authorized carrier
  • the cell 3 uses an unlicensed carrier
  • the cell 1 and the cell 3 can perform carrier aggregation.
  • the uplink data transmission method proposed by the embodiment of the present invention may be used to implement the uplink data transmission.
  • the retransmission and the new transmission adopt the same HARQ process, but the retransmission and the new transmission sub-frame interval are different (see FIG. 2), and each HARQ process corresponds to a buffer;
  • the asynchronous sending method of the provided uplink data includes:
  • Step S201 the terminal is configured with cell 1 and cell 3, and then performs cell aggregation by using cell 1 and cell 3;
  • cell 3 is an unlicensed carrier.
  • Step S202 the terminal performs the resource competition process of the cell 3, and successfully contends to the resource, and notifies the base station of the time-frequency domain information of the contending resource;
  • Step S203 After receiving the time-frequency domain information of the contending resource, the base station sends an uplink authorization indication to the terminal.
  • Step S204 the terminal receives an uplink grant indication of the base station, and performs corresponding processing by decoding:
  • the terminal receives the uplink grant indication of the base station, and after decoding, finds that the uplink grant indication is for the HARQ process 2, and is the first scheduled scheduling of the process, that is, there is no NDI data before (the process)
  • the terminal performs a new transmission operation (transmits the uplink data on the specified TTI according to the time indication information on the uplink authorization indication), and saves the relevant information.
  • a new transmission operation transmits the uplink data on the specified TTI according to the time indication information on the uplink authorization indication
  • the terminal receives the uplink grant indication of the base station again, and after decoding, finds that the uplink grant indication is for the HARQ process 2, and the NDI is 0, and the NDI (which is 1) is reversed compared to the last transmission, regardless of the process. If the buffer is empty, the terminal performs a new transmission operation (transmits the uplink data on the specified TTI according to the time indication information on the uplink authorization indication), and saves the related information.
  • the related information includes at least the transmitted data, the identification information of the HARQ process, and the status of the NDI (NDI is 0 at this time).
  • step S205 after the used resources are used, the data has not been completely transmitted, and all the buffers related to the HARQ process on the cell 3 are cleared.
  • Step S206 the terminal performs the resource competition process of the cell 3 again and successfully contends to the resource, and notifies the base station of the time-frequency domain information of the contending resource;
  • Step S207 The base station sends an uplink grant indication to the terminal.
  • Step S208 the terminal receives the uplink authorization indication of the base station, and performs corresponding processing after decoding:
  • the terminal receives the uplink grant indication from the base station, and after decoding, finds that the uplink grant indication is for the HARQ process 1.
  • the terminal performs The new transmission operation (transmits the uplink data on the specified TTI according to the time indication information on the uplink authorization indication), and saves the relevant information.
  • the related information includes at least the transmitted data, the identification information of the HARQ process (ID, such as the process number of the HARQ), and the state of the NDI (the NDI is 0 at this time).
  • the terminal receives the uplink grant indication of the base station again, and finds that the uplink grant indication is for the HARQ process 1.
  • the buffer of the HARQ process 1 is not empty, and the NDI is 0, compared to the last transmitted NDI. (0) If no flipping occurs, the terminal performs a retransmission operation (transmitting uplink data on the specified TTI according to the time indication information on the uplink grant indication). At this time, if the buffer is empty, the terminal does not process, ignoring the uplink authorization indication.
  • the base station has two cells, a cell 1 and a cell 3.
  • the cell 1 uses an authorized carrier
  • the cell 3 uses an unlicensed carrier
  • the cell 1 and the cell 3 can perform carrier aggregation.
  • the uplink data transmission method proposed by the embodiment of the present invention may be used to implement the uplink data transmission.
  • the retransmission and the new transmission are not the same HARQ process, and the method includes:
  • Step S301 the terminal is configured with cell 1 and cell 3, and performs cell aggregation by using cell 1 and cell 3;
  • cell 3 is an unlicensed carrier.
  • Step S302 the base station performs the resource competition process of the cell 3, and successfully competes for resources, and the resources to be competed.
  • Step S303 the base station sends an uplink grant indication to the terminal.
  • the base station performs uplink scheduling on the terminal, and sends an uplink authorization indication to the terminal.
  • Step S304 the terminal receives the uplink authorization indication of the base station, and performs corresponding processing after decoding:
  • the terminal receives the uplink grant indication of the base station, and after decoding, finds that the uplink grant indication is for the HARQ process 2, and is the schedule that the process 2 receives the uplink grant indication for the first time, that is, there is no data of any NDI before.
  • the process receives the scheduling for the first time, and the buffer of the process is empty, the terminal performs a new transmission operation (transmits the uplink data on the specified TTI according to the time indication information on the uplink authorization indication), and saves the related information. If the buffer of the process is not empty, the terminal does not process the device and discards the uplink authorization indication.
  • the terminal receives the uplink grant indication of the base station again, and after decoding, finds that the uplink grant indication is for the HARQ process 2, and the NDI is 0, and the NDI (which is 1) is reversed compared to the last transmission, regardless of the process. If the buffer is empty, the terminal performs a new transmission operation (transmits the uplink data on the specified TTI according to the time indication information on the uplink authorization indication), and saves the related information.
  • the related information includes at least the transmitted data, the identification information of the HARQ process, and the status of the NDI (NDI is 0 at this time).
  • step S305 after the used resources are used, the data has not been completely transmitted successfully, and all related buffers are cleared.
  • Step S306 the base station performs the resource contention process of the cell 3 again, and successfully contends to the resource, and notifies the terminal to include the time-frequency domain information of the contending resource;
  • Step S307 the base station sends an uplink grant indication to the terminal.
  • Step S308 the terminal receives the uplink authorization indication of the base station, and performs corresponding processing after decoding:
  • the terminal receives the uplink grant indication of the base station, and after decoding, finds that the uplink grant indication is for the HARQ process 1.
  • the terminal is Perform a new transmission operation (transmit the uplink data on the specified TTI according to the time indication information on the uplink authorization indication), and save the relevant information.
  • the related information includes at least the transmitted data, the identification information of the HARQ process, and the status of the NDI (NDI is 0 at this time).
  • the terminal receives the uplink grant indication of the base station again, and finds that the uplink grant indication is for the HARQ process 1, and carries another process HARQ2, and the terminal learns that the buffer of the HARQ process 2 needs to be viewed.
  • the buffer of 2 is non-empty, and the NDI in the uplink grant indication is 0.
  • the NDI (for 0) transmitted last time of the HARQ process 2 has not been flipped, and the terminal performs a retransmission operation (according to the time indication information on the uplink grant indication).
  • the uplink data is sent on the specified TTI.
  • the buffer of the HARQ process 2 needs to be moved to the HARQ process 1, and contains related information, including the transmitted data.
  • the NDI is 0 at this time. At this time, if the buffer of the HARQ process 2 is empty, the terminal does not process, and ignores the uplink authorization indication.
  • Step S309 after the used resources are used, the data has not been completely transmitted successfully, and all the buffers related to the HARQ process of the cell 3 are reserved, and the timing is set according to the unlicensed carrier (the timing is set for the cell 3, and the timing length is 6 ms) After more than 6ms, cell 3 does not receive a new uplink grant indication, clearing all buffers.
  • an embodiment of the present invention provides a terminal, which includes a receiving unit, a first acquiring unit, a determining unit, a second acquiring unit, and a retransmission unit, and a unit included in each unit.
  • Each module can be implemented by a processor in the terminal, and can also be implemented by a specific logic circuit.
  • the processor can be a central processing unit (CPU), a microprocessor (MPU), Digital signal processor (DSP) or field programmable gate array (FPGA).
  • the terminal 400 includes: a receiving unit 401, a first obtaining unit 402, a determining unit 403, a second obtaining unit 404, and a retransmission unit 405. among them:
  • the receiving unit 401 is configured to receive an uplink authorization indication sent by the base station, where the uplink authorization indication includes at least identifier information of the first HARQ process;
  • the first obtaining unit 402 is configured to acquire the state information of the first HARQ process according to the identifier information of the HARQ process, where the state information of the HARQ process includes at least whether the NDI value in the first HARQ process is reversed, and the first Whether the buffer area of the HARQ process is empty;
  • the first determining unit 403 is configured to determine, according to the uplink authorization indication and/or status information of the first HARQ process, whether to perform retransmission or new transmission;
  • the second obtaining unit 404 is configured to acquire time-frequency domain information of the contending resources
  • the retransmission unit 405 is configured to: when the terminal determines to perform retransmission, the terminal uses the first HARQ process to retransmit the uplink data sent before the resource corresponding to the time-frequency domain information, Or the terminal retransmits the uplink data sent before the second HARQ process on the resource corresponding to the time-frequency domain information by using a first HARQ process that is different from the second HARQ process.
  • the terminal when retransmitting by using the second HARQ process, the terminal further includes a moving unit and a clearing unit, where:
  • a moving unit configured to move uplink data of a buffer corresponding to the second HARQ process to a buffer corresponding to the first HARQ process
  • the clearing unit is configured to clear the buffer corresponding to all processes if the resource is used up, regardless of whether the data is completely sent successfully.
  • the terminal further includes a processing unit, configured to perform carrier aggregation of the unlicensed carrier and the authorized carrier, or complete dual connectivity between the cell of the unlicensed carrier and the cell of the authorized carrier.
  • the terminal further includes a contention unit and a sending unit, where:
  • the contention unit is configured to perform resource competition on the unlicensed carrier
  • the sending unit is configured to send time-frequency domain information of the contending resources to the base station.
  • the second acquiring unit is configured to obtain time-frequency domain information of the resource from the uplink authorization indication.
  • the first determining unit is configured to: if the value of the NDI in the first HARQ process is compared with the value of the NDI in the transmission of the first HARQ process or the second HARQ process Or, if the uplink grant indication is in the PDCCH identified by the C-RNTI and the buffer of the first HARQ process is empty, or if the first HARQ process or transport block receives the uplink grant indication for the first time Scheduling, or if the uplink grant indication is in the random access response, it is determined to be a new transmission;
  • the uplink grant indication is in C-
  • the buffer of the RNTI identifier or the first HARQ process is not empty, or if the first HARQ process or the transport block is not the first time to receive the uplink grant indication, or if the uplink grant indication is not In the random access response, it is determined to be a retransmission.
  • the subframe interval retransmitted by the first HARQ process is different from the newly transmitted subframe interval of the first HARQ process, where a sub-frame is different.
  • the frame interval refers to the interval between a subframe that receives an uplink grant indication and a retransmitted or newly transmitted subframe.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the groups shown or discussed The coupling, or direct coupling, or communication connection between the components may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units; they may be located in one place or distributed on multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a removable storage device, a read only memory (ROM), a magnetic disk, or an optical disk, and the like, which can store program codes.
  • ROM read only memory
  • the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a ROM, a magnetic disk, or an optical disk.
  • the method for transmitting the unlicensed carrier uplink data provided by the present application can be applied to the terminal that communicates with the base station, and the asynchronous transmission mode of the uplink data is adopted in the unlicensed carrier scenario, so that the delay of the data transmission can be uncontrollable and easy to appear.

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Abstract

本发明公开了一种非授权载波上行数据的发送方法及基站，所述方法包括：所述终端接收基站发送的上行授权指示，所述上行授权指示中至少包括第一HARQ进程的标识信息；所述终端根据所述HARQ进程的标识信息获取所述第一HARQ进程的状态信息，所述第一HARQ进程的状态信息至少包括第一HARQ进程中NDI值、第一HARQ进程的缓存区状态；所述终端根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传；所述终端获取竞争到的资源的时频域信息；如果所述终端确定进行重传时，所述终端利用与第二HARQ进程不同的第一HARQ进程在与所述时频域信息对应的资源上重传所述第二HARQ进程之前的发送的上行数据。

Description

非授权载波上行数据的发送方法及终端
本申请要求于2016年2月2日提交中国专利局、申请号为201610074258.5的中国专利申请的优先权，以上全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域，具体而言，涉及一种非授权载波上行数据的发送方法及终端。
背景技术
长期演进(LTE)系统中，终端(UE，User Equipment)需要在物理上行共享信道(PUSCH，Physical Uplink Shared CHannel)上发送数据(除了非自适应重传)，需要获得基站分配的有效的上行授权指示。该上行授权指示可以在物理下行控制信道(PDCCH，Physical Downlink Control CHannel)上或者随机接入响应中动态配置，或者被半静态配置，上行授权指示中包含终端可以在哪个时间哪个载波上传输数据和采用的调制编码方案等。终端获得基站分配的上行授权指示后，可以在指定的时频域资源上发送上行数据。
为了进行上行数据的传输，在UE侧，介质访问控制(MAC，Media Access Control)层需要从物理层获得相关的混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)信息。UE侧存在一个HARQ实体，HARQ实体维护一定数量并行的HARQ进程，从而实现在等待上一次传输成功与否的反馈期间继续进行连续的传输。在一个给定的传输时间间隔(TTI，Transmission Time Interval)，如果指示该TTI的上行授权指示，HARQ实体为将要发生的传输确定一个HARQ进程。HARQ实体还把从物理层接收到的HARQ反馈正确/错误应答(ACK/NACK，Acknowledgement/Negative Acknowledgement)信息、调制与编码策略(MCS，Modulation and Coding Scheme)信息和资源信息发送给相应的HARQ进程。每个HARQ进程均对应一个HARQ缓冲区(buffer)。目前，采用重传数据包的时候一般采用同步发送方式，即重传数据包时候，终端会在相对于第一次传输该数据包的HARQ进程的固定的地方重传该数据包。
为向移动用户提供更高的数据速率而引入载波聚合技术(CA，Carrier Aggregation)，UE进入连接态后可以同时通过多个分量载波(如CC1，CC2)与源基站进行通信，基站会通过显式的配置或者按照协议约定为UE指定一个主分量载波(Primary Component Carrier，PCC)，其他的分量载波称为辅分量载波(Secondary Component Carrier，SCC)，在PCC上的服务小区称为主服务小区(Primary Cell，Pcell)，在SCC上的服务小区称为辅服务小区(Secondary Cell，Scell)。
随着数据业务的快速增长，在不久的将来，授权频谱将不能承受如此巨大的数据量；所以LTE运营商考虑在非授权频谱资源(Unlicensed Carrier)中部署LTE，通过非授权频 谱来分担授权载波中的数据流量。非授权载波(免授权频谱)是指在满足政府部门(如国家无线电管理委员会)有关规定(无线电管制)下，不需要授权就能直接使用的频谱或载波。例如，微波炉、遥控玩具飞机、无线鼠标、无线键盘、高保真无线上网(WiFi，Wireless Fidelity)等都使用了非授权载波。在有的情况下，非授权载波需要通过竞争才能使用。如果基站(此处的基站至少包括微基站、微微基站、WiFi接入点)没有竞争到资源，则不能使用非授权载波。非授权载波和授权载波可以通过载波聚合的方式使用，非授权载波一般作为数据传输的补充，即授权载波作为主服务小区，非授权载波作为辅服务小区。
非授权载波资源有很大的特殊性，在此场景下如果仍然采用当前的上行数据的同步发送方式(即终端会在相对于第一次传输该数据包的HARQ进程的固定时间间隔重传该数据包)，会使得上行数据发送的时延不可控制，容易出现不正常的情况，因此会花费很长时间才能发送成功，这些情况都会引起丢包的问题。
发明内容
有鉴于此，本发明实施例为解决现有技术中存在的至少一个问题而提供一种非授权载波上行数据的发送方法及终端，在非授权载波场景下采用上行数据的异步发送方式，以解决数据发送的时延不可控制、容易出现不正常的情况等而引起丢包的问题。
本发明实施例的技术方案是这样实现的：
第一方面，本发明实施例提供一种非授权载波上行数据的发送方法，所述方法包括：
所述终端接收基站发送的上行授权指示，所述上行授权指示中至少包括第一HARQ进程的标识信息；
所述终端根据所述HARQ进程的标识信息获取所述第一HARQ进程的状态信息，所述HARQ进程的状态信息至少包括第一HARQ进程中NDI值是否翻转、第一HARQ进程的缓存区是否为空；
所述终端根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传；
所述终端获取竞争到的资源的时频域信息；
如果所述终端确定进行重传时，所述终端利用利用所述第一HARQ进程在与所述时频域信息对应的资源上重传之前发送的上行数据，或者所述终端利用与第二HARQ进程不同的第一HARQ进程在与所述时频域信息对应的资源上重传所述第二HARQ进程之前的发送的上行数据。
第二方面，本发明实施例提供一种终端，所述终端包括接收单元、第一获取单元、确定单元、第二获取单元和重传单元，其中：
所述接收单元，用于接收基站发送的上行授权指示，所述上行授权指示中至少包括第一HARQ进程的标识信息；
所述第一获取单元，用于根据所述HARQ进程的标识信息获取所述第一HARQ进程 的状态信息，所述HARQ进程的状态信息至少包括第一HARQ进程中NDI值是否翻转、第一HARQ进程的缓存区是否为空；
所述第一确定单元，用于根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传；
所述第二获取单元，用于获取竞争到的资源的时频域信息；
所述重传单元，用于如果所述终端确定进行重传时，所述终端利用利用所述第一HARQ进程在与所述时频域信息对应的资源上重传之前发送的上行数据，或者所述终端利用与第二HARQ进程不同的第一HARQ进程在与所述时频域信息对应的资源上重传所述第二HARQ进程之前的发送的上行数据。
本发明实施例提供的非授权载波上行数据的发送方法及终端，其中，所述终端接收基站发送的上行授权指示，所述上行授权指示中至少包括第一HARQ进程的标识信息；所述终端根据所述HARQ进程的标识信息获取所述第一HARQ进程的状态信息，所述HARQ进程的状态信息至少包括第一HARQ进程中NDI值是否翻转、第一HARQ进程的缓存区是否为空；所述终端根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传；所述终端获取竞争到的资源的时频域信息；如果所述终端确定进行重传时，所述终端利用与第二HARQ进程不同的第一HARQ进程在与所述时频域信息对应的资源上重传所述第二HARQ进程之前的发送的上行数据；如此，在非授权载波场景下采用上行数据的异步发送方式，以解决数据发送的时延不可控制、容易出现不正常的情况等而引起丢包的问题。
附图说明
图1为相关技术中发送上行数据的示意图；
图2为本发明实施例中发送上行数据的示意图；
图3为本发明实施例一非授权载波上行数据的发送方法的实现流程示意图；
图4为本发明实施例一终端的组成结构示意图。
具体实施方式
下面先介绍一下相关技术中上行同步发送数据的过程：终端接收基站发送的PDCCH，如果PDCCH中包含上行授权指示，所述终端根据收到上行授权指示的子帧确定HARQ进程号，并获取HARQ进程的状态信息，则终端根据所述上行授权指示和HARQ进程的状态信息进行判断是否要触发一次重传(之前已经发送过的数据包的再一次传输)或者触发一次新传(之前没有发送的一个数据包的第一次传输)：其中，HARQ进程的状态信息至少包括：HARQ进程前一次传输中的NDI值，HARQ进程的缓冲区状态，其中缓冲区状态包括缓冲区是否为空以及是否NULL。具体地，
如果上行授权指示不在以小区无线网络临时标识(T-CRNTI，Temporary Cell Radio  Network Temporary Identifier)标识的PDCCH中，并且如果相关HARQ信息中的新数据指示(NDI，New Data Indicator)相比该HARQ进程前一次传输中的值翻转过，或者，如果上行授权指示在以小区的无线网络临时标识(C-RNTI，Cell Radio Network Temporary Identity)标识的PDCCH中，并且该HARQ进程的缓冲区为空(即缓冲区中的数据为空)，或者，如果所述上行授权指示在随机接入响应中，则通知相应的HARQ进程触发一次新的传输；否则，在不符合以上新传触发条件的情况下，均通知相应的HARQ进程触发一次自适应重传。例如，如果上行授权指示在以T-CRNTI标识的PDCCH中或如果相关HARQ信息中的NDI相比该HARQ进程前一次传输中的值未翻转过，或者，如果上行授权指示不在以小区的C-RNTI标识的PDCCH中或该HARQ进程的缓冲区不为空(即缓冲区中的数据不为空)，或者，如果所述上行授权指示不在随机接入响应中，则通知相应的HARQ进程触发一次自适应重传。
如果终端接收到基站发送的PDCCH没有包含上行授权指示，该TTI对应的HARQ进程的缓冲区非空(缓冲区中的数据不为空)，通知相应的HARQ进程触发一次非自适应重传；相关技术中，对于相应的HARQ进程的缓冲区(buffer)的处理是这样的，新传的时候，将数据或数据包保存到缓冲区里；只收到确认(ACK)信息，对缓冲区不作处理；当重传次数超过最大次数，则清除缓冲区。
相关技术中，终端在数据需要重传的时候，如果竞争到的资源已经使用完毕，或者没有重新竞争到资源，那么数据重传过程就不能正常执行，只能等到资源竞争到，才能执行数据重传过程(所以相关技术中会容易出现不正常的情况，需要等待很长的时间才能发送成功)；如果重传次数超出最大次数，则会使得数据发送的时延变长，最终导致丢包。相关技术中丢包的另一重要原因在于，由于没有竞争到资源按照现有技术，只能不停地等，当一直没有竞争到资源时，就放弃了。
为了解决非授权载波场景下的上行数据的同步发送方式中存在的问题，本发明实施例将在非授权载波场景下，引入上行数据的异步发送方式或方法，即，通过PDCCH携带HARQ进程号来进行调度，重传总是通过PDCCH调度。
为了更好的理解本发明的各实施例，先介绍几个概念：
重传，是指对之前已经发送过的数据包的再一次传输；
新传，是指对于一个之前没有发送的数据包的第一次传输；
相关技术中非授权载波场景下的上行数据的同步发送方式，即终端收到上行授权指示的子帧和发送上行数据与之间的时间间隔，以及终端发送上行数据与收到相应之间的时间间隔，是固定的。参见图1所示，在相关技术中，如果终端在子帧0的时刻收到基站的上行授权指示，则终端始终是在从收到上行授权指示的子帧时刻起子帧间隔为4的子帧(子帧号为4)上发送上行数据；终端将在从发送上行数据的子帧起子帧间隔为4的子帧(子帧号为8)收到响应消息(如NACK信息)，如果终端在子帧号为8的时刻收到基站的NACK信息，则要进行重传，而终端始终是在从收到NACK信息的子帧起在固定的子帧 间隔为4的子帧(子帧号为12)上进行重传。
下面具体介绍一下本发明实施例提出的一种采用上行数据的异步发送方法，该方法的实现过程是这样的：
终端接收基站发送的PDCCH，包含上行授权指示，所述上行授权指示中携带有HARQ进程的标识信息，所述终端根据HARQ进程的标识信息确定HARQ进程的状态信息，则终端至少根据所述上行授权指示和HARQ进程的状态信息进行判断是否要触发一次重传或者触发一次新传，具体地，参见表1，如果相关HARQ信息中的NDI相比该HARQ进程前一次传输中的值翻转过，或者，如果上行授权指示在以C-RNTI标识的PDCCH中并且该HARQ进程的缓冲区为空(缓冲区中的数据为空)，或者，如果这个HARQ进程或传输块(TB，Transport Block)是第一次收到上行调度，即，之前没有任何NDI的数据，或者，如果上行授权指示在随机接入响应中，则通知相应的HARQ进程触发一次新传；否则，在不符合以上新传触发条件的情况下，均通知相应的HARQ进程触发一次重传。例如，如果相关HARQ信息中的NDI相比该HARQ进程前一次传输中的值未翻转过，或者，如果上行授权指示不在以C-RNTI标识的PDCCH中或该HARQ进程的缓冲区不为空(缓冲区中的数据不为空)，或者，如果这个HARQ进程或TB并非第一次收到上行调度(即，之前已有NDI的数据)，或者，如果上行授权指示不在随机接入响应中，则通知相应的HARQ进程触发一次重传。
表1
Figure PCTCN2016104756-appb-000001
在本发明实施例中，重传和新传可以采用相同的HARQ进程或不同的HARQ进程，需要说明的是，当采用相同的HARQ进程的时候，终端会在第一次传输该数据包的HARQ进程的可变的时间间隔(相同的子帧)重传该数据包；参见图2，如果终端在子帧0的时刻收到基站的上行授权指示，如果终端判断为进行新传，则终端可以在子帧号为5(可以是新传时刻与收到上行授权指示的子帧不是固定间隔，且在上行授权指示中指示这个间隔)进行新传；如果终端在子帧号为8的时刻收到基站的上行授权指示，如果终端判断为 进行重传，则终端在子帧号为14(可以是重传时刻与收到上行授权指示的子帧不是固定间隔，或者在上行授权指示中指示这个间隔)上进行重传。可见，在本发明实施例中，新传和重传的子帧间隔是不一样的。
这里，RV用于表明发送数据的不同版本，以根据版本接收数据的时候进行合并。本发明实施例中发送的时间间隔不固定，即本发明实施例采用可变的时间间隔发送上行数据对解决技术问题有重要的影响，具体来说，相关技术中的间隔固定，如果固定的时间没有资源可以用来重传或新传，就只能等下一个固定间隔才能进行发送；而本发明实施例中间隔不固定，则可以在有资源的时候进行发送。当然，在本发明的另一实施例中，重传和新传也可以采用相关技术中的固定间隔。相关技术中ACK信息和ACK对是否重传起着重要作用，而本发明实施例中，将不会再有ACK信息和NACK，终端是否重传是根据表1所示的信息来决定。
本发明实施例中，对于相应的缓冲区的处理是这样的，每个HARQ进程对应有一个缓冲区(buffer)；
方法一：新传的时候，将数据保存到缓冲区里，下次有新传再将数据覆盖即可，相当于把原来的缓冲区清除了，新的数据保存起来。
方法二：收到重传调度时，重传和新传不是同一个HARQ进程，将需要重传的数据转移到进行重传的HARQ进程的缓冲区中。
以上两种方法，当竞争到的资源使用完毕，数据尚未完全发送成功，将所有相关的缓冲区清除。对于基站进行资源竞争过程，基站需要通知终端资源竞争的结果，包含竞争到的资源的时频域信息。或者，缓冲区保留，设置定时器(以非授权载波为单位设置)，超过一定时间没有收到新的上行授权指示，清除所有的缓冲区。
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。
实施例一
针对上述的相关技术中存在的问题，本发明实施例提供一种非授权载波上行数据的发送方法，应用于终端，该方法所实现的功能可以通过终端中的处理器调用程序代码来实现，当然程序代码可以保存在计算机存储介质中，可见，该终端至少包括处理器和存储介质。
图3为本发明实施例一非授权载波上行数据的发送方法的实现流程示意图，如图3所示，该方法包括：
步骤S101，所述终端接收基站发送的上行授权指示，所述上行授权指示中至少包括第一HARQ进程的标识信息；
这里，第一HARQ进程应该是处理授权资源的进程即基站在上行授权指示中指示的新HARQ进程。
步骤S102，所述终端根据所述HARQ进程的标识信息获取所述第一HARQ进程的状态信息；
这里，所述第一HARQ进程的状态信息至少包括第一HARQ进程中NDI值、第一 HARQ进程的缓存区状态；
步骤S103，所述终端根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传；
这里，步骤S103根据表1确定是否进行重传或新传。
步骤S104，所述终端获取竞争到的资源的时频域信息；
步骤S105，如果所述终端确定进行重传时，所述终端利用所述第一HARQ进程在与所述时频域信息对应的资源上重传第一HARQ进程缓冲区内之前发送的上行数据，或者所述终端利用与第二HARQ进程不同的第一HARQ进程在与所述时频域信息对应的资源上重传所述第二HARQ进程之前的发送的上行数据。
这里，在具体实现的过程中所述第二HARQ进程可以采用如下的方式来确定，所述终端根据上行授权指示中的信息确定与所述第一HARQ进程不同的第二HARQ进程。
本发明实施例中，如果终端确定进行新传，则终端利用所述第一HARQ进程在与所述时频域信息对应的资源上新传一个上行数据包。
本发明实施例中的上行数据的异步发送有两种实现方式，方式一，重传与新传采用同一个HARQ进程，但是重传与新传时子帧间隔不同，在方式一下，上行授权指示中只包括第一HARQ进程的标识信息。方式二，重传与新传不是同一个HARQ进程，则在该方式二下，如果上行授权指示中包括第一HARQ进程和第二HARQ进程的标识信息，这时，终端利用第一HARQ进程将第二HARQ进程缓冲区内的数据进行重发，并将原来第二HARQ进程的数据保存到第一HARQ进程的缓冲区中。在方式二下，例如之前发送上行数据采用HARQ进程1(即第二HARQ进程)，而重传采用HARQ进程2(即第一HARQ进程)。
本发明实施例中，当利用所述第一HARQ进程重传时，所述方法还包括：
步骤S106，所述终端将所述第二HARQ进程对应的缓冲区的上行数据搬移到所述第一HARQ进程对应的缓冲区；
步骤S107，如果所述资源使用完毕，无论数据是否完全发送成功，所述终端清除该载波上所有进程对应的缓冲区。
本发明实施例中，在所述终端接收基站发送的上行授权指示之前，所述方法还包括：所述终端进行所述非授权载波和授权载波的载波聚合；或者，所述终端完成所述非授权载波的小区和授权载波的小区之间的双连接。
本发明实施例中，所述终端和所述基站都可以在所述非授权载波上进行资源竞争，当终端进行资源竞争时，所述方法还包括：所述终端在所述非授权载波上进行资源竞争，将竞争到的资源的时频域信息发送给基站，然后基站再向终端发送上行授权指示；对应地，步骤S104，所述终端获取竞争到的资源的时频域信息，包括：所述终端从上行授权指示中获取资源的时频域信息。当基站进行资源竞争时，所述方法还包括：所述基站在所述非授权载波上进行资源竞争，将竞争到资源的时频域信息携带于上行授权指示中发送给终 端；此时，步骤S104，所述终端获取竞争到的资源的时频域信息，包括：所述终端从所述上行授权指示中获得所述资源的时频域信息。
本发明实施例中，所述终端根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传，包括：
参见表1，如果所述第一HARQ进程中的NDI的值相比所述第一HARQ进程前一次或所述第二HARQ进程传输中NDI的值翻转过，或者，如果上行授权指示在以C-RNTI标识的PDCCH中并且所述第一HARQ进程的缓冲区为空，或者，如果所述第一HARQ进程或传输块第一次收到上行授权指示的调度，或者，如果上行授权指示在随机接入响应中，则确定为新传；
否则，在不符合以上新传触发条件的情况下，均确定为重传。例如，如果所述第一HARQ进程中的NDI的值相比所述第一HARQ进程前一次或所述第二HARQ进程传输中NDI的值未翻转过，或者，如果上行授权指示不在以C-RNTI标识的PDCCH中或所述第一HARQ进程的缓冲区不为空，或者，如果所述第一HARQ进程或传输块并非第一次收到上行授权指示的调度，或者，如果上行授权指示不在随机接入响应中，则确定为重传。
本发明实施例中，当利用所述第一HARQ进程重传时，所述第一HARQ进程重传的子帧间隔与所述第一HARQ进程新传的子帧间隔是不一样的，其中子帧间隔是指收到上行授权指示的子帧与重传或新传的子帧之间的间隔。
实施例二
本发明实施例中，基站有小区1和小区3这两个小区，其中小区1采用授权载波，小区3采用非授权载波，且小区1和小区3可以进行载波聚合。相关技术中，对于小区1与非授权载波的小区通过双连接的方式进行聚合而实现上行数据的发送时，当然也可以采用本发明实施例提出的上行数据的异步发送方法实现上行数据的发送。在本发明实施例中，重传与新传采用同一个HARQ进程，但是重传与新传时子帧间隔不同(参见图2)，且每个HARQ进程对应有一个缓冲区；本发明实施例提供的上行数据的异步发送方法，包括：
步骤S201，终端被配置小区1和小区3，然后利用小区1和小区3进行载波聚合；
这里，小区3是非授权载波。
步骤S202，终端执行小区3的资源竞争过程，并成功竞争到资源，将竞争到的资源的时频域信息通知基站；
步骤S203，基站收到竞争到的资源的时频域信息后，基站向终端发送上行授权指示；
步骤S204，终端收到基站的上行授权指示，解码进行相应处理：
具体地，1)终端收到基站的上行授权指示，解码后发现：该上行授权指示是针对HARQ进程2的，是该进程第一个收到的调度，即之前没有任何NDI的数据(该进程第一次收到调度)，并且该进程的缓冲区为空，则终端执行新传操作(根据上行授权指示上的时间指示信息，在指定的TTI上发送上行数据)，并保存下相关信息，包含发送的数据，NDI 此时为1等；此时，如果该进程的缓冲区非空(即缓冲区不为空)，则终端不做处理，丢弃该上行授权指示。
2)终端再次收到基站的上行授权指示，解码后发现：该上行授权指示是针对HARQ进程2的，并且NDI为0，相对于上次传输的NDI(为1)发生了翻转，不管该进程的缓冲区是否为空，则终端执行新传操作(根据上行授权指示上的时间指示信息，在指定的TTI上发送上行数据)，并保存下相关信息。所述相关信息至少包含发送的数据、HARQ进程的标识信息和NDI的状态(NDI此时为0)等。
步骤S205，竞争到的资源使用完毕，数据尚未完全发送成功，将小区3上所有HARQ进程相关的缓冲区清除。
步骤S206，终端再次执行小区3的资源竞争过程并成功竞争到资源，将竞争到的资源的时频域信息通知基站；
步骤S207，基站向终端发送上行授权指示；
步骤S208，终端收到基站的上行授权指示，解码后执行相应处理：
具体地，1)终端收到基站的上行授权指示，解码后发现：该上行授权指示是针对HARQ进程1的，在以C-RNTI标识的PDCCH中并且该HARQ进程缓冲区为空，则终端执行新传操作(根据上行授权指示上的时间指示信息，在指定的TTI上发送上行数据)，并保存下相关信息。所述相关信息至少包含发送的数据、HARQ进程的标识信息(ID，例如HARQ的进程号)和NDI的状态(NDI此时为0)等。
2)终端再次收到基站的上行授权指示，解码后发现：该上行授权指示是针对HARQ进程1的，此时HARQ进程1的缓冲区非空，并且NDI为0，相对于上次传输的NDI(为0)没有发生了翻转，则终端执行重传操作(根据上行授权指示上的时间指示信息，在指定的TTI上发送上行数据)。此时，如果缓冲区为空，则终端不做处理，忽略此次上行授权指示。
3)，如果接收到的上行授权指示在随机接入响应中，不管NDI是否翻转，也不管缓冲区是否为空，终端执行新传操作。
实施例三
本发明实施例中，基站有小区1和小区3这两个小区，其中小区1采用授权载波，小区3采用非授权载波，且小区1和小区3可以进行载波聚合。对于小区1与非授权载波的小区通过双连接的方式进行聚合从而实现上行数据发送时，当然也可以采用本发明实施例提出的上行数据的异步发送方法实现上行数据的发送。在本发明实施例中，重传与新传不是同一个HARQ进程，该方法包括：
步骤S301，终端被配置小区1和小区3，利用小区1和小区3进行载波聚合；
这里，小区3是非授权载波。
步骤S302，基站执行小区3的资源竞争过程，并成功竞争到资源，将竞争到的资源 的时频域信息通知终端；
步骤S303，基站向终端发送上行授权指示；
这里，基站对终端进行上行调度，将上行授权指示发送给终端。
步骤S304，终端收到基站的上行授权指示，解码后执行相应处理：
1)终端收到基站的上行授权指示，解码后发现：该上行授权指示是针对HARQ进程2的，是该进程2第一次收到上行授权指示的调度，即之前没有任何NDI的数据(该进程第一次收到调度)，并且该进程的缓冲区为空，则终端执行新传操作(根据上行授权指示上的时间指示信息，在指定的TTI上发送上行数据)，并保存下相关信息，包含发送的数据，NDI此时为1等；此时，如果该进程的缓冲区非空，则终端不做处理，丢弃该上行授权指示。
2)终端再次收到基站的上行授权指示，解码后发现：该上行授权指示是针对HARQ进程2的，并且NDI为0，相对于上次传输的NDI(为1)发生了翻转，不管该进程的缓冲区是否为空，则终端执行新传操作(根据上行授权指示上的时间指示信息，在指定的TTI上发送上行数据)，并保存下相关信息。所述相关信息至少包含发送的数据、HARQ进程的标识信息和NDI的状态(NDI此时为0)等。
步骤S305，竞争到的资源使用完毕，数据尚未完全发送成功，将所有相关的缓冲区清除。
步骤S306，基站再次执行小区3的资源竞争过程，并成功竞争到资源，通知终端，包含竞争到的资源的时频域信息；
步骤S307，基站向终端发送上行授权指示；
步骤S308，终端收到基站的上行授权指示，解码后执行相应处理：
具体地，1)终端收到基站的上行授权指示，解码后发现：该上行授权指示是针对HARQ进程1的，在以C-RNTI标识的PDCCH中并且该HARQ进程的缓冲区为空，则终端执行新传操作(根据上行授权指示上的时间指示信息，在指定的TTI上发送上行数据)，并保存下相关信息。所述相关信息至少包含发送的数据、HARQ进程的标识信息和NDI的状态(NDI此时为0)等。
2)终端再次收到基站的上行授权指示，解码后发现：该上行授权指示是针对HARQ进程1的，同时携带有另外一个进程HARQ2，终端获知需要查看HARQ进程2的缓冲区，此时HARQ进程2的缓冲区非空，并且上行授权指示中NDI为0，相对于HARQ进程2上次传输的NDI(为0)没有发生了翻转，终端执行重传操作(根据上行授权指示上的时间指示信息，在指定的TTI上发送上行数据)，需要将HARQ进程2的缓冲区移到HARQ进程1中，包含相关信息，包含发送的数据，NDI此时为0等。此时，如果HARQ进程2的缓冲区为空，则终端不做处理，忽略此次上行授权指示。
3)如果接收到的上行授权指示在随机接入响应中，不管NDI是否翻转，也不管缓冲区是否为空，终端执行新传操作。
步骤S309，竞争到的资源使用完毕，数据尚未完全发送成功，将保留小区3所有HARQ进程相关的缓冲区，同时按照非授权载波来设置定时(针对小区3设置定时，如此时定时长度为6ms)，超过6ms，小区3没有收到新的上行授权指示，清除所有的缓冲区。
实施例四
基于前述的实施例，本发明实施例提供一种终端，所述终端所包括的接收单元、第一获取单元、确定单元、第二获取单元和重传单元的各单元，以及各单元所包括的各模块，都可以通过终端中的处理器来实现，当然也可通过具体的逻辑电路实现；在具体实施例的过程中，处理器可以为中央处理器(CPU)、微处理器(MPU)、数字信号处理器(DSP)或现场可编程门阵列(FPGA)等。
图4为本发明实施例四终端的组成结构示意图，如图4所示，该终端400包括：接收单元401、第一获取单元402、确定单元403、第二获取单元404和重传单元405，其中：
所述接收单元401，用于接收基站发送的上行授权指示，所述上行授权指示中至少包括第一HARQ进程的标识信息；
所述第一获取单元402，用于根据所述HARQ进程的标识信息获取所述第一HARQ进程的状态信息，所述HARQ进程的状态信息至少包括第一HARQ进程中NDI值是否翻转、第一HARQ进程的缓存区是否为空；
所述第一确定单元403，用于根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传；
所述第二获取单元404，用于获取竞争到的资源的时频域信息；
所述重传单元405，用于如果所述终端确定进行重传时，所述终端利用利用所述第一HARQ进程在与所述时频域信息对应的资源上重传之前发送的上行数据，或者所述终端利用与第二HARQ进程不同的第一HARQ进程在与所述时频域信息对应的资源上重传所述第二HARQ进程之前的发送的上行数据。
本发明实施例中，当利用所述第二HARQ进程重传时，所述终端还包括搬移单元和清除单元，其中：
搬移单元，用于将所述第二HARQ进程对应的缓冲区的上行数据搬移到所述第一HARQ进程对应的缓冲区；
清除单元，用于如果所述资源使用完毕，无论数据是否完全发送成功，清除所有进程对应的缓冲区。
本发明实施例中，所述终端还包括处理单元，用于进行所述非授权载波和授权载波的载波聚合；或者，完成所述非授权载波的小区和授权载波的小区之间的双连接。
本发明实施例中，所述终端还包括竞争单元和发送单元，其中：
所述竞争单元，用于在所述非授权载波上进行资源竞争；
所述发送单元，用于将竞争到的资源的时频域信息发送给基站。
本发明实施例中，所述第二获取单元，用于从所述上行授权指示中获得所述资源的时频域信息。
本发明实施例中，所述第一确定单元，用于如果所述第一HARQ进程中的NDI的值相比所述第一HARQ进程前一次或所述第二HARQ进程传输中NDI的值翻转过，或者，如果上行授权指示在以C-RNTI标识的PDCCH中并且所述第一HARQ进程的缓冲区为空，或者，如果所述第一HARQ进程或传输块第一次收到上行授权指示的调度，或者，如果上行授权指示在随机接入响应中，则确定为新传；
否则，在不符合以上新传触发条件的情况下，均确定为重传。例如，如果所述第一HARQ进程中的NDI的值相比所述第一HARQ进程前一次或所述第二HARQ进程传输中NDI的值未翻转过，或者，如果上行授权指示在以C-RNTI标识的PDCCH中或所述第一HARQ进程的缓冲区不为空，或者，如果所述第一HARQ进程或传输块并非第一次收到上行授权指示的调度，或者，如果上行授权指示不在随机接入响应中，则确定为重传。
本发明实施例中，当利用所述第一HARQ进程重传时，所述第一HARQ进程重传的子帧间隔与所述第一HARQ进程新传的子帧间隔是不一样的，其中子帧间隔是指收到上行授权指示的子帧与重传或新传的子帧之间的间隔。
这里需要指出的是：以上终端实施例项的描述，与上述方法描述是类似的，具有同方法实施例相同的有益效果，因此不做赘述。对于本发明终端实施例中未披露的技术细节，本领域的技术人员请参照本发明方法实施例的描述而理解，为节约篇幅，这里不再赘述。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本发明的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
在本申请所提供的几个实施例中，应该理解到，所揭露的设备和方法，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组 成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或单元的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理单元；既可以位于一个地方，也可以分布到多个网络单元上；可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。
另外，在本发明各实施例中的各功能单元可以全部集成在一个处理单元中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：移动存储设备、只读存储器(Read Only Memory，ROM)、磁碟或者光盘等各种可以存储程序代码的介质。
或者，本发明上述集成的单元如果以软件功能模块的形式实现并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：移动存储设备、ROM、磁碟或者光盘等各种可以存储程序代码的介质。
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以所述权利要求的保护范围为准。
工业实用性
本申请提供的非授权载波上行数据的发送方法，可应用在与基站通信的终端中，通过在非授权载波场景下采用上行数据的异步发送方式，能够解决数据发送的时延不可控制、容易出现不正常的情况等而引起丢包的问题。

Claims (10)

  1. 一种非授权载波上行数据的发送方法，包括：
    所述终端接收基站发送的上行授权指示，所述上行授权指示中至少包括第一混合自动重传请求HARQ进程的标识信息；
    所述终端根据所述HARQ进程的标识信息获取所述第一HARQ进程的状态信息，所述第一HARQ进程的状态信息至少包括第一HARQ进程中新数据指示NDI值、第一HARQ进程的缓存区状态；
    所述终端根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传；
    所述终端从所述上行授权指示中获得所述资源的时频域信息；
    如果所述终端确定进行重传时，所述终端利用利用所述第一HARQ进程在与所述时频域信息对应的资源上重传之前发送的上行数据，或者所述终端利用与第二HARQ进程不同的第一HARQ进程在与所述时频域信息对应的资源上重传所述第二HARQ进程之前的发送的上行数据。
  2. 根据权利要求1所述的方法，其中，当利用所述第一HARQ进程重传时，所述方法还包括：
    所述终端将所述第二HARQ进程对应的缓冲区的上行数据搬移到所述第一HARQ进程对应的缓冲区。
  3. 根据权利要求2所述的方法，其中，所述方法还包括：
    如果所述资源使用完毕，无论数据是否完全发送成功，所述终端清除所有进程对应的缓冲区。
  4. 根据权利要求1所述的方法，其中，在所述终端接收基站发送的上行授权指示之前，所述方法还包括：
    所述终端进行所述非授权载波和授权载波的载波聚合；或者，
    所述终端完成所述非授权载波的小区和授权载波的小区之间的双连接。
  5. 根据权利要求1至4任一项所述的方法，其中，所述方法还包括：
    所述终端在所述非授权载波上进行资源竞争，将竞争到的资源的时频域信息发送给基站。
  6. 根据权利要求1至4任一项所述的方法，其中，所述终端根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传，包括：
    如果所述第一HARQ进程中的NDI的值相比所述第一HARQ进程前一次或所述第二HARQ进程传输中NDI的值翻转过，或者，如果上行授权指示在以小区的无线网络临时标识C-RNTI标识的物理下行控制信道PDCCH中并且所述第一HARQ进程的缓冲区为 空，或者，如果所述第一HARQ进程或传输块第一次收到上行授权指示的调度，或者，如果上行授权指示在随机接入响应中，则确定为新传；
    否则，则确定为重传。
  7. 根据权利要求1至4任一项所述的方法，其中，当利用所述第一HARQ进程重传时，所述第一HARQ进程重传的子帧间隔与所述第一HARQ进程新传的子帧间隔是不一样的，其中子帧间隔是指收到上行授权指示的子帧与重传或新传的子帧之间的间隔。
  8. 一种终端，包括接收单元、第一获取单元、确定单元、第二获取单元和重传单元，其中：
    所述接收单元，设置为接收基站发送的上行授权指示，所述上行授权指示中至少包括第一混合自动重传请求HARQ进程的标识信息；
    所述第一获取单元，设置为根据所述HARQ进程的标识信息获取所述第一HARQ进程的状态信息，所述第一HARQ进程的状态信息至少包括第一HARQ进程中NDI值是否翻转、第一HARQ进程的缓存区是否为空；
    所述第一确定单元，设置为根据所述上行授权指示和/或所述第一HARQ进程的状态信息确定是否进行重传或新传；
    所述第二获取单元，设置为从所述上行授权指示中获得所述资源的时频域信息；
    所述重传单元，设置为如果所述终端确定进行重传时，所述终端利用利用所述第一HARQ进程在与所述时频域信息对应的资源上重传之前发送的上行数据，或者所述终端利用与第二HARQ进程不同的第一HARQ进程在与所述时频域信息对应的资源上重传所述第二HARQ进程之前的发送的上行数据。
  9. 根据权利要求8所述的终端，其中，所述第一确定单元，设置为如果所述第一HARQ进程中的NDI的值相比所述第一HARQ进程前一次或所述第二HARQ进程传输中新数据指示NDI的值翻转过，或者，如果上行授权指示在以小区的无线网络临时标识C-RNTI标识的物理下行控制信道PDCCH中并且所述第一HARQ进程的缓冲区为空，或者，如果所述第一HARQ进程或传输块第一次收到上行授权指示的调度，或者，如果上行授权指示在随机接入响应中，则确定为新传；
    否则，则确定为重传。
  10. 根据权利要求8或9所述的终端，其中，当利用所述第二HARQ进程重传时，所述终端还包括搬移单元和清除单元，其中：
    所述搬移单元，设置为将所述第二HARQ进程对应的缓冲区的上行数据搬移到所述第一HARQ进程对应的缓冲区；
    所述清除单元，设置为如果所述资源使用完毕，无论数据是否完全发送成功，清除所有进程对应的缓冲区。
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