WO2018027949A1 - 一种通信方法、网络设备及终端 - Google Patents

一种通信方法、网络设备及终端 Download PDF

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Publication number
WO2018027949A1
WO2018027949A1 PCT/CN2016/094990 CN2016094990W WO2018027949A1 WO 2018027949 A1 WO2018027949 A1 WO 2018027949A1 CN 2016094990 W CN2016094990 W CN 2016094990W WO 2018027949 A1 WO2018027949 A1 WO 2018027949A1
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Prior art keywords
tti length
harq
terminal
network device
information
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PCT/CN2016/094990
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English (en)
French (fr)
Inventor
时洁
张兴炜
黎超
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2016/094990 priority Critical patent/WO2018027949A1/zh
Publication of WO2018027949A1 publication Critical patent/WO2018027949A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method, a network device, and a terminal.
  • LTE Long Term Evolution
  • OFDM Orthogonal Frequency Division Multiplexing
  • the subframe structure in the LTE network changes according to different communication requirements, and the Transmission Time Interval (TTI) of the subframe also changes.
  • TTI Transmission Time Interval
  • the TTI length of the uplink (UL) may be longer than the TTI length of the downlink (DL).
  • sTTI Short Transmission Time Interval
  • the service type is dynamically changed. Therefore, the length of the TTI may be dynamically changed. Therefore, at a certain time, the evolved Node B (evolved NodeB, eNB or eNodeB) may send the TTI length to the terminal.
  • the configuration change instruction may be for the UL or the DL.
  • the TTI length configuration change command is used to indicate that the TTI of the DL changes in (2os (ofdm symbol), 7os), or is used to indicate that the TTI of the UL changes in (2os, 4os, 7os), or is used to indicate Change between sTTI and TTI.
  • the original transmission position of the DL or UL data changes, resulting in mis-transmission and mis-reception of data, wasting radio resources, and causing transmission rate and system capacity. decline.
  • Embodiments of the present invention provide a communication method, a network device, and a terminal, to change a TTI length In this case, increase the transmission rate and system capacity.
  • a communication method the network device determines that a transmission time interval TTI length on a communication link is changed; the network device sends indication information to the terminal, the indication information is used to indicate that at least one hybrid automatic retransmission is to be performed
  • the transport block TB requesting the HARQ process is cleared or used to indicate communication with the terminal on the frequency domain resource where the changed TTI length is located.
  • the terminal receives the indication information sent by the network device, and clears the transport block TB of the at least one hybrid automatic repeat request HARQ process according to the indication information, or is used to indicate the frequency domain resource where the changed TTI length is located. Communicate with the terminal.
  • the network device may send the indication information that the TB of the HARQ process is cleared to the terminal, so that the terminal sends the HARQ to the terminal.
  • the TB in the process is cleared, and the data is retransmitted in the TB of the changed TTI length to ensure the correct transmission and reception of the data.
  • the indication information is used to indicate that the TB of the at least one HARQ process is cleared, before the network device sends the indication information to the terminal, determining that the TB before the TTI length change cannot be changed after the TTI length is changed. Transmitted on the communication link.
  • the clearing of the TB of the at least one HARQ includes: clearing the TB of the at least one HARQ process of one terminal; or clearing the TB of the at least one HARQ process of the group of terminals; or at least one HARQ of the cell.
  • the TB of the process is cleared.
  • the at least one HARQ process is a full HARQ process, or a specified HARQ process.
  • the specified HARQ process is a process that specifies a HARQ identifier, or a HARQ process that meets a QoS requirement for setting a quality of service.
  • the communicating with the terminal on the frequency domain resource where the changed TTI length is located includes: discarding the frequency domain resource before the TTI length change, and the terminal and the terminal in the frequency domain resource where the changed TTI length is located The communication is performed, and the data is data on the TB of the HARQ process before the TTI length change.
  • the network device may obtain the data sent by the terminal after transmitting the indication information to the terminal, and send the HARQ feedback information according to the changed TTI length on the downlink.
  • the terminal receives HARQ feedback information that the network device sends on the downlink according to the changed TTI length.
  • the network device sends uplink grant information to the terminal, if the HARQ feedback information is an error response command NACK.
  • the terminal receives uplink authorization information sent by the network device.
  • the HARQ identification information of the HARQ feedback information or the HARQ identification information corresponding to the uplink authorization information may also be sent.
  • the terminal receives the HARQ identification information of the HARQ feedback information sent by the network device or the HARQ identification information corresponding to the uplink authorization information.
  • the terminal performs HARQ processing according to the HARQ identification information of the HARQ feedback information and the state of the HARQ process before the TTI length change.
  • the terminal performs HARQ processing according to the HARQ identification information corresponding to the uplink grant information and the state of the HARQ process before the TTI length change. If the HARQ process is at least two HARQ processes, the at least two HARQ processes are combined.
  • the indication information is sent in an explicit manner or implicitly by at least one or a combination of a radio resource control RRC message, a broadcast message, a medium access control layer MAC control element CE, and physical layer signaling. send. If the indication information is used to indicate that the TB of the at least one HARQ process is cleared, and is sent by physical layer signaling, the indication information is implicitly sent by the resource where the physical layer signaling is located; or the indication information is downlinked. The new data included in the control information DCI arrives at the inverted indication information.
  • the indication information is used to indicate that the terminal is in communication with the terminal on the frequency domain resource where the changed TTI length is located, and is sent by using physical layer signaling, the indication information is sent by using the downlink control information DCI.
  • the DCI further carries at least one or a combination of a HARQ identifier and a modulation and coding scheme MCS corresponding to the data information.
  • a network device having a function of implementing the behavior of the network device in the first aspect described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device includes a processing unit and a sending unit, where a unit for determining a change in the transmission time interval TTI length on the communication link, and determining indication information, the indication information being used to indicate that the transport block TB of the at least one hybrid automatic repeat request HARQ process is cleared, or Communicate with the terminal on the frequency domain resource indicating the length of the changed TTI.
  • the sending unit is configured to send the indication information determined by the processing unit to the terminal.
  • the processing unit is further configured to: before the sending unit sends the indication information to the terminal, determine that the TTI length is changed before The TB cannot be transmitted on the communication link after the TTI length is changed.
  • the processing unit is specifically configured to: clear the TB of the at least one HARQ by zero: clearing the TB of the at least one HARQ process of one terminal; or TB of the at least one HARQ process of the group of terminals Cleared; or clear the TB of at least one HARQ process of the cell.
  • the at least one HARQ process is a full HARQ process, or a specified HARQ process.
  • the specified HARQ process is a process that specifies a HARQ identity, or a HARQ process that meets a quality of service QoS requirement.
  • the processing unit is specifically configured to: instruct, according to the following manner, to communicate with the terminal on the frequency domain resource where the changed TTI length is located: indicating to discard the frequency domain resource before the TTI length change, and the length of the changed TTI is
  • the frequency domain resource communicates with the terminal, and the data is data on the TB of the HARQ process before the TTI length change.
  • the processing unit is further configured to: after the sending unit sends the indication information to the terminal, The data sent by the terminal.
  • the sending unit is further configured to send the HARQ feedback information according to the changed TTI length on the downlink.
  • the sending unit is further configured to: send uplink authorization information to the terminal.
  • the method further includes: sending the HARQ identification information of the HARQ feedback information or the HARQ identification information corresponding to the uplink authorization information.
  • the sending unit controls the RRC message, the broadcast message, and the media connection by using the radio resource.
  • the indication information is sent in an explicit manner or in an implicit manner to at least one or a combination of the control layer MAC Control Element CE and the physical layer signaling.
  • the sending unit implicitly sends the indication information by using the physical layer signaling resource; or
  • the new data included in the downlink control information DCI arrives at the inverted indication information to transmit the indication information.
  • the sending unit sends the indication information by using downlink control information DCI.
  • the DCI further carries at least one or a combination of a HARQ identifier and a modulation and coding scheme MCS corresponding to the data information.
  • the processing unit included in the network device may be a processor, and the transmitting unit may be a transceiver.
  • the processor is configured to support a network device to perform a corresponding function in the above method, the transceiver being configured to support communication between a network device and a terminal or other network entity.
  • the network device may further include a memory for coupling with the processor, which stores program instructions and data necessary for the network device.
  • the network device may be a base station device.
  • a terminal having a function of implementing the behavior of the terminal in the above first aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal comprises a receiving unit and a processing unit.
  • the receiving unit is configured to receive indication information that is sent by the network device when the length of the transmission time interval TTI on the communication link is changed, where the indication information is used to indicate that at least one hybrid automatic repeat request HARQ process is to be performed.
  • the transport block TB is cleared or used to indicate communication with the network device on the frequency domain resource where the changed TTI length is located.
  • the processing unit is configured to clear the transport block TB of the at least one HARQ process of the terminal according to the indication information, or communicate with the network device on the frequency domain resource where the changed TTI length is located.
  • the processing unit is further configured to: determine the TTI The TB before the length change cannot be transmitted on the communication link after the TTI length is changed.
  • the TB of the at least one HARQ including: clearing the TB of the at least one HARQ process of one terminal; or clearing the TB of the at least one HARQ process of the group of terminals; or The TB of the specific at least one HARQ process is cleared.
  • the at least one HARQ process indicated by the indication information is a full HARQ process, or a specified HARQ process.
  • the specified HARQ process is a process that specifies a HARQ identity, or a HARQ process that meets a quality of service QoS requirement.
  • the processing unit specifically communicates with the network device according to the indication information on the frequency domain resource where the changed TTI length is located according to the indication information: discarding the frequency domain resource before the TTI length change, and changing the TTI
  • the frequency domain resource on which the length is located communicates with the network device, wherein the data communicated with the network device is data on the TB of the HARQ process before the TTI length change.
  • the receiving unit is further configured to: after the processing unit sends data on the frequency domain resource where the changed TTI length is located according to the indication information, the receiving network device is changed according to the downlink on the downlink.
  • the HARQ feedback information sent by the TTI length is further configured to: after the processing unit sends data on the frequency domain resource where the changed TTI length is located according to the indication information, the receiving network device is changed according to the downlink on the downlink.
  • the HARQ feedback information sent by the TTI length is further configured to: after the processing unit sends data on the frequency domain resource where the changed TTI length is located according to the indication information, the receiving network device is changed according to the downlink on the downlink.
  • the receiving unit is further configured to receive uplink authorization information sent by the network device.
  • the receiving unit receives the HARQ feedback information sent by the network device according to the changed TTI length on the downlink: receiving the HARQ identification information or the uplink authorization of the HARQ feedback information sent by the network device The HARQ identification information corresponding to the information.
  • the processing unit is further configured to: the HARQ identification information according to the HARQ feedback information and the HARQ process before the TTI length change The state of HARQ processing.
  • the processing unit is further configured to: according to the HARQ identification information corresponding to the uplink authorization information, and the HARQ before the TTI length change The state of the process, performing HARQ processing.
  • the processing unit performs the HARQ process in the following manner: if the HARQ process is at least two HARQ processes, the at least two HARQ processes are combined.
  • the receiving unit receives the foregoing in an explicit manner or in an implicit manner by using at least one or a combination of a radio resource control RRC message, a broadcast message, a medium access control layer MAC control element CE, and physical layer signaling. Instructions. If the indication information is used to indicate that the TB of the at least one HARQ process is cleared and received by the physical layer signaling, the receiving unit implicitly receives the indication information by using a resource of the physical layer signaling; or The new data included in the control information DCI arrives at the inverted indication information to receive the indication information.
  • the receiving unit receives the indication information by using the downlink control information DCI.
  • the DCI further carries at least one or a combination of a HARQ identifier and a modulation and coding scheme MCS corresponding to the data information.
  • the processing unit of the terminal involved in the third aspect may be a processor, and the receiving unit may be a receiver.
  • the terminal can also include a memory for coupling with the processor that retains program instructions and data necessary for the terminal.
  • the terminal may further include an antenna.
  • a communication method in which the network device determines that a transmission time interval TTI length on a communication link is changed; and the network device instructs the terminal to change the TTI length effective time in the communication chain.
  • the road communicates according to the changed TTI length.
  • the terminal determines an effective time of the TTI length change; the terminal communicates on the communication link according to the changed TTI length according to the effective time of the TTI length change.
  • the effective time may be used to indicate that the terminal uses the start time of the TTI after the length change on the communication link; or the effective time may be started by the terminal receiving the effective time information.
  • the offset value is represented by the offset time; or the effective time may be represented by a timing time at which the terminal receives the effective time information as a start.
  • the network device when the length of the TTI is changed, instructs the terminal to perform communication on the communication link after the TTI length is changed according to the effective time of the TTI length change, so that the terminal can perform the maximum degree and the network device. Transmitting and/or receiving of the data packets of the communication to avoid the time-frequency resource locations of the transmitted and/or received data packets changing before and after the TTI length change, and further Avoid packet errors and misrepresentation.
  • the effective time may be pre-configured on the terminal or sent by the network device to the terminal.
  • the network device may send, to the terminal, activation indication information, where the activation indication information is used to activate the effective time.
  • the terminal receives the activation indication information sent by the network device, and activates the effective time.
  • the effective time may be at least two effective times, and the network device may select an effective time in the at least two effective times, and send and/or indicate the effective time of the selection to the terminal.
  • the network device may further instruct the terminal to select an effective time in the at least two effective times.
  • the network device instructs the terminal to transmit and/or receive data according to the changed TTI length on the communication link according to the selected effective time.
  • the terminal transmits and/or receives data according to the changed TTI length on the communication link according to an effective time selected in the at least two effective times.
  • the network device may send the RRC message, the broadcast message, the medium access layer MAC control element CE, and the physical layer signaling by using at least one or a combination of the radio resource, in an explicit manner or in an implicit manner.
  • Effective time and/or activation information The terminal transmits the effective time and/or in an explicit manner or in an implicit manner by using at least one or a combination of a radio resource control RRC message, a broadcast message, a medium access layer MAC control element CE, and physical layer signaling.
  • the activation information receives the effective time and/or the activation information.
  • the activation indication information is sent in the downlink control information DCI, or the activation indication information is a time-frequency using the DCI, if the activation time and/or the activation information is sent through physical layer signaling.
  • the resource is implicitly transmitted; or the activation indication information is implicitly transmitted using the scrambling code of the DCI.
  • the effective time satisfies a formula at a time-frequency resource location of the DCI:
  • n n ru mod N; or satisfy the formula:
  • n (n ru +m) mod N;
  • n ru is an index value of the first wireless unit where the terminal downlink control information is located
  • N is used to indicate the number of optional lifetimes
  • n is the sequence number of the selected lifetime
  • m is the network side.
  • mod() represents the remainder operation.
  • the effective time may be an effective time for a terminal, or an effective time for a cell, or an effective time for a group of terminals.
  • a network device having a function of implementing the behavior of the network device in the fourth aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device processing unit and the sending unit, wherein the processing unit is configured to determine that a transmission time interval TTI length on the communication link is changed, and generate a command to indicate that the terminal follows the TTI.
  • the effective time of the length change is the indication information of the communication on the communication link according to the changed TTI length.
  • the sending unit is configured to send the indication information to the terminal.
  • the effective time is used to indicate that the terminal uses the start time of the TTI after the length change on the communication link; or the effective time is a start time when the terminal receives the effective time information.
  • the value represented by the shift value; or the effective time is represented by a timing time at which the terminal receives the effective time information as a start time.
  • the processing unit is further configured to pre-configure the effective time on the terminal to be pre-configured to the terminal.
  • the sending unit is further configured to send the effective time to the terminal.
  • the sending unit is further configured to send activation indication information, where the activation indication information is used to activate the effective time.
  • the processing unit is further configured to: further select an effective time in the at least two effective times.
  • the sending unit is further configured to send and/or indicate the selected effective time to the terminal. Or the processing unit instructs the terminal to select an effective time in the at least two effective times.
  • the processing unit is further configured to instruct the terminal to send and/or receive data according to the changed TTI length on the communication link according to the selected effective time.
  • the sending unit may send the RRC message, the broadcast message, the medium access layer MAC control element CE, and the physical layer signaling by using at least one or a combination of the radio resource, in an explicit manner or in an implicit manner.
  • the effective time and/or the activation information If the effective time and/or the activation information is sent by physical layer signaling, the activation indication information is sent in the downlink control information DCI; or the activation indication information is a time-frequency resource hidden by using DCI. Transmitted; or the activation indication information is implicitly transmitted using the DCI scrambling code.
  • the effective time is an effective time for a terminal, or an effective time for a cell, or an effective time for a group of terminals.
  • the processing unit included in the network device involved in the fifth aspect may be a processor, and the sending unit may be a transceiver.
  • the processor is configured to support a network device to perform a corresponding function in the above method, the transceiver being configured to support communication between a network device and a terminal or other network entity.
  • the network device may further include a memory for coupling with the processor, which stores program instructions and data necessary for the network device.
  • the network device may be a base station device.
  • a terminal having a function of implementing terminal behavior in the fourth aspect described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal includes a processing unit and a communication unit, wherein the processing unit is configured to determine an effective time of the TTI length change, and is changed according to the TTI length.
  • the effective time is communicated by the sending unit on the communication link according to the changed TTI length.
  • the effective time is used to indicate that the terminal uses the start time of the TTI after the length change on the communication link; or the effective time is a start time when the terminal receives the effective time information.
  • the value represented by the shift value; or the effective time is represented by a timing time at which the terminal receives the effective time information as a start time.
  • the effective time is pre-configured on the terminal or sent by the network device to the terminal. And if the effective time is sent by the network device to the terminal, the communication unit is further configured to receive the effective time.
  • the communication unit is further configured to receive activation indication information sent by the network device, where the activation indication information is used to activate the effective time.
  • the communication unit is configured to communicate on the communication link according to the changed TTI length on the selected one of the at least two effective times.
  • the one effective time selected in the at least two effective times is one effective time selected by the terminal in the at least two effective times, or the network device selects in the at least two effective times An effective time, and an effective time of the selection is sent and/or indicated to the terminal for an effective time.
  • the activation time and/or the activation information is at least one or a combination of the RRC message, the broadcast message, the medium access layer MAC control element CE, and the physical layer signaling by the communication unit by using a radio resource. , received in an explicit or implicit manner. If the effective time and/or the activation information is received through physical layer signaling, the activation indication information is received in the downlink control information DCI; or the activation indication information is a time-frequency resource hidden by using DCI. Received; or the activation indication information is implicitly received using the scrambling code of the DCI.
  • n is the selected lifetime
  • the sequence number, m is a fixed value assigned on the network side, and mod() represents a remainder operation.
  • the effective time is an effective time for a terminal, or an effective time for a cell, or an effective time for a group of terminals.
  • the processing unit of the terminal involved in the sixth aspect may be a processor, and the communication unit may be a receiver/transmitter.
  • the terminal can also include a memory for coupling with the processor that retains program instructions and data necessary for the terminal.
  • the terminal may further include an antenna.
  • a communication method is provided.
  • the network device determines that the length of the transmission time interval TTI on the information link is changed, the TTI length change information is sent, and the terminal is instructed according to the TTI length. And changing the information, updating the time-frequency resource for transmitting the hybrid automatic repeat request HARQ feedback information on the communication link, and transmitting the HARQ feedback information on the updated time-frequency resource.
  • the terminal receives the transmission time interval TTI length change information on the communication link sent by the network device, and updates the time-frequency resource for transmitting the hybrid automatic repeat request HARQ feedback information on the communication link according to the TTI length change information, and Transmitting the HARQ feedback information on the updated time-frequency resource.
  • the terminal feeds back the HARQ feedback message on the updated time-frequency resource at the time of the TTI change, so that the time-frequency resource position of the transmitted and/or received data packet can be prevented from changing before and after the TTI length change, thereby avoiding Wrong and wrong receipt of the packet.
  • the network device sends a new transmission TB or retransmits a TB, instructs the terminal to stop transmitting the HARQ feedback information, and is based on the newly transmitted TB or the retransmission TB, and the TTI length before the change.
  • TB performing joint decoding to obtain TB information after the TTI length change; wherein the new TB or the retransmission TB is received by the network device based on the TB of the HARQ before the TTI length change.
  • the terminal stops transmitting the HARQ feedback information, and acquires the new transmission block TB or the retransmission TB sent by the network device, and performs joint decoding based on the newly transmitted TB or the retransmission TB and the TB before the TTI length change.
  • TB information after the TTI length is changed.
  • the network device sends a newly transmitted TB or a retransmitted TB to the terminal, and the terminal is based on the
  • the newly transmitted TB or the retransmission TB and the TB before the TTI length change are jointly decoded to obtain the TB information after the TTI length change, and the TB information after the TTI length change continues to communicate, so that the packet can be transmitted and/or received without being transmitted.
  • the time-frequency resource location changes before and after the TTI length change, thereby avoiding packet mis-transmission and mis-reception.
  • the method further includes: determining, by the terminal, the time for transmitting the HARQ feedback information, The TTI length is changed after the time.
  • the updated time-frequency resource is: a TTI of the time-frequency resource that sends the HARQ feedback information on the communication link after the TTI length is changed, the time-frequency resource location, and the TTI length change.
  • the updated time-frequency resource is: the time-frequency resource at the indicated position corresponding to the downlink TTI length and the uplink TTI length after the TTI length is changed; wherein the downlink TTI length and the uplink after the TTI length is changed There is a preset correspondence between the TTI length and the indicated position.
  • the updated time-frequency resource is: a time-frequency resource with a set offset of the time-frequency resource location and the TTI length and the uplink TTI length corresponding to the indicated position of the TTI length change; the offset and the location There is a corresponding relationship between the downlink TTI length and the uplink TTI length after the TTI length is changed.
  • the offset is sent by the network device to the terminal; or the offset is preset on the terminal and the network device; or the offset is determined by the terminal and sent to the terminal Said network device; or said offset is negotiated jointly by said terminal and said network device.
  • the updated time-frequency resource is: a downlink TTI length before the TTI length change, an uplink TTI length, a downlink TTI length after the TTI length change, and a time frequency at the indicated position corresponding to the uplink TTI length.
  • the resource has a preset correspondence relationship between the downlink TTI length and the uplink TTI length, the downlink TTI length and the uplink TTI length after the TTI length change, and the indicated location.
  • the updated time-frequency resource is: the time-frequency resource that sends the HARQ feedback information before the TTI length change is in at least two time-frequency resources mapped on the communication link after the TTI length is changed.
  • a time-frequency resource is: the time-frequency resource that sends the HARQ feedback information before the TTI length change is in at least two time-frequency resources mapped on the communication link after the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed.
  • the time-frequency resource after the start position of the time-frequency resource of the HARQ feedback information is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed.
  • the sending the HARQ feedback information on the updated time-frequency resource includes: sending at least two HARQ feedback messages on the updated time-frequency resource.
  • the at least two HARQ feedback messages are sent in a binding manner or in a multiplexing manner; or the at least two HARQ feedback messages carry implicit HARQ identification information or explicit HARQ identification information; or the at least two And the at least two HARQ feedback messages are:
  • the feedback message is a HARQ feedback message selected by the terminal; the at least two HARQ feedback messages are HARQ feedback messages before TTI length change and/or TTI length change; the at least two HARQ feedback messages are preset according to preset Level-selected HARQ feedback messages.
  • the updated time-frequency resource location is sent by the network device to the terminal; or the updated time-frequency resource location is preset on the terminal and the network device; or And the updated time-frequency resource location is determined by the terminal and sent to the network device; or the updated time-frequency resource location is jointly negotiated by the terminal and the network device.
  • the HARQ feedback information sent on the updated time-frequency resource is correct HARQ feedback information; or the network device sends a clear indication, indicating that the TB of the HARQ process of the terminal is cleared, or the terminal is The HARQ process is cleared.
  • the terminal receives the clear indication sent by the network device, clears the TB of the HARQ process of the terminal according to the clear indication, or clears the HARQ process of the terminal.
  • the terminal may also stop sending the error response command NACK information.
  • the HARQ identifier selected and sent by the network device, and the downlink TTI length and the uplink TTI length information after the TTI length is changed.
  • the terminal may receive the HARQ identifier selected and sent by the network device, and the downlink TTI length and the uplink TTI length information after the TTI length is changed.
  • the HARQ feedback information sent on the updated time-frequency resource is the HARQ feedback information corresponding to the HARQ identifier indicated by the network device.
  • the HARQ identification information may be explicitly or implicitly included in the HARQ feedback information sent on the updated time-frequency resource.
  • the TTI length change includes: changing a TTI length within 1 ms; or changing a TTI length between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI less than 1 ms.
  • the network device may send the RRC message, the broadcast message, the medium access control layer MAC control element CE, and the physical layer signaling by using a radio resource, or send it in an explicit manner.
  • the TTI length change information may be used.
  • the terminal may transmit the TTI in an explicit manner or implicitly by using at least one or a combination of a radio resource control RRC message, a broadcast message, a medium access control layer MAC control element CE, and physical layer signaling. Length change information.
  • the TTI length change information is TTI length change information of at least one HARQ process of one terminal, TTI length change information of at least one HARQ process of a group of terminals, or TTI length change information of at least one HARQ process of a cell. .
  • the TTI length change message may be included in the updated time-frequency resource.
  • the embodiments of the present invention can avoid packet mis-transmission caused by a change in the length of the TTI in the UL HARQ process by using the foregoing possible implementation manners.
  • a network device having a function of implementing the behavior of the network device in the seventh aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device includes a processing unit and a sending unit, wherein the processing unit is configured to determine that a length of a transmission time interval TTI on the communication link is changed, and instruct the terminal to change information according to the TTI length. Updating the transmission hybrid automatic retransmission on the communication link Requesting time-frequency resources of the HARQ feedback information, and transmitting the HARQ feedback information on the updated time-frequency resource.
  • the sending unit is configured to send TTI length change information or send a new transmission block TB or retransmit a TB.
  • the processing unit is further configured to determine, before the sending unit sends the TTI length change information, a time when the HARQ feedback information is originally sent, after the TTI length change time.
  • the updated time-frequency resource is: a TTI of the time-frequency resource that sends the HARQ feedback information on the communication link after the TTI length is changed, the time-frequency resource location, and the TTI length change.
  • the updated time-frequency resource is: the time-frequency resource at the indicated position corresponding to the downlink TTI length and the uplink TTI length after the TTI length is changed; wherein the downlink TTI length and the uplink after the TTI length is changed There is a preset correspondence between the TTI length and the indicated position.
  • the processing unit is further configured to: after the terminal updates the time-frequency resource for transmitting the HARQ feedback information on the communication link, discarding the HARQ feedback information before the TTI length change takes effect.
  • the updated time-frequency resource is: a time-frequency resource with a set offset of the time-frequency resource location and the TTI length and the uplink TTI length corresponding to the indicated position of the TTI length change; the offset and the location There is a corresponding relationship between the downlink TTI length and the uplink TTI length after the TTI length is changed.
  • the offset is sent by the network device to the terminal; or the offset is preset on the terminal and the network device; or the offset is determined by the terminal and sent to the terminal Said network device; or said offset is negotiated jointly by said terminal and said network device.
  • the updated time-frequency resource is: a downlink TTI length before the TTI length change, an uplink TTI length, a downlink TTI length after the TTI length change, and a time frequency at the indicated position corresponding to the uplink TTI length.
  • the updated time-frequency resource is: one time-frequency resource of the at least two time-frequency resources mapped on the communication link after the TTI length change is sent by the time-frequency resource that sends the HARQ feedback information before the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed.
  • the time-frequency resource after the start position of the time-frequency resource of the HARQ feedback information is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed.
  • the sending unit sends the HARQ feedback information on the updated time-frequency resource by sending at least two HARQ feedback messages on the updated time-frequency resource.
  • the sending unit is configured to send the at least two HARQ feedback messages in a binding manner or a multiplexing manner, or carry the at least two HARQ feedback messages with implicit HARQ identification information or explicit HARQ identification information.
  • the at least two HARQ feedback messages are pre-agreed HARQ feedback messages that need to be sent by the network device; or the at least two HARQ feedback messages are HARQs whose size of the used transport block TB matches the current TTI length. Feedback message.
  • the at least two HARQ feedback messages sent by the sending unit may be the HARQ feedback message selected by the terminal; or the at least two HARQ feedback messages sent by the sending unit are before the TTI length change and/or The HARQ feedback message after the TTI length is changed; or the at least two HARQ feedback messages sent by the sending unit are HARQ feedback messages that are selected according to a preset priority order.
  • the updated time-frequency resource location is sent by the network device to the terminal; or the updated time-frequency resource location is preset on the terminal and the network device; or And the updated time-frequency resource location is determined by the terminal and sent to the network device; or the updated time-frequency resource location is jointly negotiated by the terminal and the network device.
  • the processing unit is further configured to determine that the error response finger sent by the terminal is not received. Let NACK information.
  • the sending unit is further configured to send a clear indication, where the clear indication is used to indicate that the TB of the HARQ process of the terminal is cleared, or the HARQ process of the terminal is cleared.
  • the processing unit is further configured to select a HARQ identifier, and a downlink TTI length and an uplink TTI length information after the TTI length is changed, where the sending unit is further configured to select and send the HARQ identifier, and the TTI length is changed. Downstream TTI length and uplink TTI length information.
  • the HARQ feedback information sent on the updated time-frequency resource is the HARQ feedback information corresponding to the HARQ identifier indicated by the network device.
  • the HARQ identification information that is sent on the updated time-frequency resource is explicitly or implicitly included in the HARQ identification information.
  • the TTI length is changed, including: the TTI length is changed within 1 ms; or the TTI length is changed between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI of less than 1 ms.
  • the sending unit sends the RRC message, the broadcast message, the medium access control layer MAC control element CE, and the physical layer signaling by using at least one or a combination of the RRC message, and is sent in an explicit manner or in an implicit manner.
  • the TTI length change information
  • the TTI length change information is TTI length change information of at least one HARQ process of one terminal, TTI length change information of at least one HARQ process of a group of terminals, or TTI length change information of at least one HARQ process of a cell.
  • the TTI length change message may be included in the updated time-frequency resource.
  • the processing unit of the network device in the eighth aspect may be a processor, and the transmitting unit may be a transceiver.
  • the processor is configured to support a network device to perform a corresponding function in the above method, the transceiver being configured to support communication between a network device and a terminal or other network entity.
  • the network device may further include a memory for coupling with the processor, which stores program instructions and data necessary for the network device.
  • the network device may be a base station device.
  • a terminal having a function of implementing the behavior of the terminal in the seventh aspect described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal comprises a receiving unit, a processing unit and a transmitting unit.
  • the receiving unit is configured to receive transmission time interval TTI length change information on a communication link sent by the network device.
  • the processing unit is configured to update, according to the TTI length change information received by the receiving unit, a time-frequency resource that sends a hybrid automatic repeat request HARQ feedback information on the communication link.
  • the sending unit is configured to send the HARQ feedback information on the updated time-frequency resource.
  • the receiving unit is configured to acquire a new transmission block TB or a retransmission TB sent by the network device.
  • the processing unit is configured to stop transmitting the HARQ feedback information, and perform joint decoding to obtain the TB information after the TTI length change based on the newly transmitted TB or the retransmission TB received by the receiving unit and the TB before the TTI length change.
  • the transmitting unit is configured to send a new transmission TB or the retransmission TB based on the TB of the HARQ before the TTI length change.
  • the processing unit is further configured to: before updating the time-frequency resource for transmitting the HARQ feedback information on the communication link, determine, according to the TTI length change information, a time for transmitting the HARQ feedback information, where the TTI length is changed. after that.
  • the updated time-frequency resource is: a TTI of the time-frequency resource that sends the HARQ feedback information on the communication link after the TTI length is changed, the time-frequency resource location, and the TTI length change.
  • the updated time-frequency resource is: a time-frequency resource at the indicated position corresponding to the downlink TTI length and the uplink TTI length after the TTI length is changed.
  • the downlink TTI length after the TTI length is changed has a preset correspondence relationship between the uplink TTI length and the indication position.
  • the processing unit is further configured to: after updating the time-frequency resource that sends the HARQ feedback information on the communication link, discard the HARQ feedback information before the TTI length change takes effect.
  • the updated time-frequency resource is: a time-frequency resource with a set offset of the time-frequency resource location and the TTI length and the uplink TTI length corresponding to the indicated position of the TTI length change; the offset and the location There is a corresponding relationship between the downlink TTI length and the uplink TTI length after the TTI length is changed.
  • the offset is sent by the network device to the terminal; or the offset is preset And the network device; or the offset is determined by the terminal and sent to the network device; or the offset is negotiated by the terminal and the network device.
  • the updated time-frequency resource is: a downlink TTI length before the TTI length change, an uplink TTI length, a downlink TTI length after the TTI length change, and a time frequency at the indicated position corresponding to the uplink TTI length.
  • the resource has a preset correspondence relationship between the downlink TTI length and the uplink TTI length, the downlink TTI length and the uplink TTI length after the TTI length change, and the indicated location.
  • the updated time-frequency resource is: one time-frequency resource of the at least two time-frequency resources mapped on the communication link after the TTI length change is sent by the time-frequency resource that sends the HARQ feedback information before the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed.
  • the time-frequency resource after the start position of the time-frequency resource of the HARQ feedback information is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed.
  • the sending unit specifically sends the HARQ feedback information on the updated time-frequency resource by sending at least two HARQ feedback messages on the updated time-frequency resource.
  • the at least two HARQ feedback messages are sent in a binding manner or in a multiplexing manner; or the at least two HARQ feedback messages carry implicit HARQ identification information or explicit HARQ identification information; or the at least two And the at least two HARQ feedback messages are:
  • the feedback message is a HARQ feedback message selected by the terminal; the at least two HARQ feedback messages are HARQ feedback messages before TTI length change and/or TTI length change; the at least two HARQ feedback messages are preset according to preset Level-selected HARQ feedback messages.
  • the updated time-frequency resource location is sent by the network device to the terminal; or the updated time-frequency resource location is preset on the terminal and the network device; or The updated time-frequency resource location is determined by the terminal and sent to the network device; or the updated time-frequency resource location is jointly negotiated by the terminal and the network device.
  • the HARQ feedback information sent on the updated time-frequency resource is correct HARQ feedback information.
  • the receiving unit is further configured to receive a clear indication sent by the network device, where the clear indication is used to indicate that the TB of the HARQ process of the terminal is cleared, or the HARQ process of the terminal is cleared.
  • the sending unit is further configured to stop sending the error response command NACK information.
  • the receiving unit is further configured to receive a HARQ identifier selected and sent by the network device, and a downlink TTI length after the TTI length is changed. With upstream TTI length information.
  • the HARQ feedback information sent on the updated time-frequency resource is the HARQ feedback information corresponding to the HARQ identifier indicated by the network device.
  • the HARQ identification information may be explicitly or implicitly included in the HARQ feedback information sent on the updated time-frequency resource.
  • the TTI length is changed, including: the TTI length is changed within 1 ms; or the TTI length is changed between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI of less than 1 ms.
  • the receiving unit sends the RRC message, the broadcast message, the media access control layer, the MAC control element, and the physical layer signaling, at least one or a combination of the RRC message, in an explicit manner, or in an implicit manner. Receiving the TTI length change information.
  • the TTI length change information may be TTI length change information of at least one HARQ process of one terminal, TTI length change information of at least one HARQ process of a group of terminals, or TTI length change information of at least one HARQ process of a cell.
  • the TTI length change message may be included in the updated time-frequency resource.
  • the processing unit of the terminal involved in the ninth aspect may be a processor, the receiving unit may be a receiver, and the sending unit may be a transmitter.
  • the terminal may also include storage
  • the memory is for coupling with a processor, which stores program instructions and data necessary for the terminal.
  • the terminal may further include an antenna.
  • a communication method in which, in a case that a network device determines that a transmission time interval TTI length on a communication link is changed, the network device sends a TTI length change instruction, where the TTI length change instruction is used to indicate The length of the TTI on the communication link of the terminal communication is changed.
  • the terminal receives a transmission time interval TTI length change command sent by the network device; the terminal communicates according to the TTI length change instruction.
  • the terminal receives the uplink grant time after receiving the TTI length change instruction time, or the terminal simultaneously receives the uplink grant and the TTI length change command.
  • the terminal transmits and/or data on the communication link whose TTI length is changed according to the uplink grant. If the terminal receives the uplink grant time before receiving the TTI length change command time, the terminal discards the time-frequency resource corresponding to the uplink grant.
  • the network device may send indication information indicating whether the uplink authorization is valid or not.
  • the terminal Before receiving the data according to the TTI length change command, the terminal receives the indication information that is sent by the network device to indicate whether the uplink authorization is valid or not.
  • the terminal sends the TB data carrying the hybrid automatic repeat request HARQ identifier on the UL authorized resource.
  • the network device may send physical layer information, where the physical layer information is used to indicate that the data is sent according to the uplink grant, or the TTI sends the data according to the length change.
  • the network device may send physical layer information, where the physical layer information is used to indicate that the data is sent according to the uplink grant, or the TTI sends the data according to the length change.
  • the uplink authorization may be resent.
  • the terminal receives an uplink grant retransmitted by the network device before sending the data according to the TTI length change command.
  • the terminal sends the data according to the TTI length change instruction, where the terminal determines the updated time-frequency resource according to the TTI length change command, and communicates on the updated time-frequency resource;
  • the updated time-frequency resource is sent before the TTI length is changed.
  • the time-frequency resource is one of the at least two time-frequency resources mapped on the communication link after the TTI length change.
  • One time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time zone of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed A time-frequency resource after the start position of the time-frequency resource of the HARQ response information.
  • the terminal sends the data according to the TTI length change command, where the terminal determines the updated time-frequency resource according to the TTI length change command, and sends at least two on the updated time-frequency resource. data.
  • the at least two pieces of data are sent by using a binding mode or a multiplexing mode; or the at least two pieces of data carry implicit data identification information or explicit data identification information; or the at least two pieces of data are The network device pre-agreed data to be transmitted; or the at least two data is data whose size of the used transport block TB matches the current TTI length; the at least two data are data selected by the terminal; the at least two The data is data before the TTI length change and/or after the TTI length is changed; the at least two data are data selected in a preset priority order.
  • the TTI length change includes: changing a TTI length within 1 ms; or changing a TTI length between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI less than 1 ms.
  • the terminal sends data before the TTI length change command takes effect, and the TTI length change instruction is performed.
  • the network device After receiving the feedback information that the network device performs the automatic retransmission request HARQ feedback on the data, the network device sends a HARQ identifier that performs HARQ feedback on the data or a data identifier that performs HARQ feedback on the data, The terminal receives the HARQ identifier sent by the network device and performs HARQ feedback on the data or the data identifier of performing HARQ feedback on the data.
  • the network device sends the indication information, where the indication information is used to indicate whether the HARQ identifier for performing HARQ feedback on the data or the data identifier for indicating whether to perform HARQ feedback on the data, where the terminal receives the network device to send Instructions. Or the net The network device sends feedback information of the first HARQ that conflicts in the HARQ feedback information that performs HARQ feedback on the data or feedback information of the high priority HARQ. The terminal receives feedback information of the first HARQ that conflicts in the HARQ feedback information that is sent by the network device and performs HARQ feedback on the data, or feedback information of the high priority HARQ.
  • the HARQ identifier or the data identifier is sent or received by using downlink control information DCI; or the HARQ identifier or the data identifier is associated with location information of a physical hybrid automatic request retransmission indication channel PHICH.
  • the terminal acquires a time-frequency resource that transmits the HARQ feedback information by using a time-frequency resource of a transport block that transmits the HARQ identifier and/or the HARQ feedback information, where the time-frequency resource includes a short TTI that is less than 1 ms. Time information.
  • the terminal after the terminal acquires the HARQ feedback information, the terminal performs synchronous HARQ based on the changed TTI.
  • a network device having a function of implementing the behavior of the network device in the above tenth aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device processing unit and the sending unit are configured to determine a transmission time interval TTI length change on the communication link, and determine to indicate that a TTI length on the communication link of the terminal occurs. And changing, and instructing the terminal to perform a TTI length change instruction for communicating according to the TTI length change instruction.
  • the transmitting unit is configured to send a TTI length change instruction.
  • the sending unit is further configured to send indication information for indicating whether the uplink authorization is valid or not.
  • the sending unit is further configured to send physical layer information, where the physical layer information is used to indicate that the data is sent according to the uplink grant, or is sent according to the length after the TTI is changed. data.
  • the sending unit is further configured to resend the uplink grant.
  • the processing unit specifically indicates that the terminal changes according to the length of the TTI Directing communication: if the terminal receives the uplink grant time after receiving the TTI length change command time, or the terminal simultaneously receives the uplink grant and the TTI length change command, the indication station The terminal performs communication on the communication link whose length of the TTI is changed according to the uplink grant. And if the terminal receives the uplink grant time before receiving the TTI length change instruction time, instructing the terminal to discard the time-frequency resource corresponding to the uplink grant.
  • the processing unit is configured to instruct the terminal to perform communication according to the TTI length change instruction, where the terminal is instructed to determine the updated time-frequency resource according to the TTI length change command, and the updated time-frequency resource is used. Communicate on.
  • the updated time-frequency resource is one of the at least two time-frequency resources mapped by the time-frequency resource that sends the HARQ response information before the TTI length change on the communication link after the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain location of the at least two time-frequency resources is the highest a time-frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a time-frequency resource start position in the at least two time-frequency resources before the TTI length is changed And transmitting a time-frequency resource after the start position of the time-frequency resource of the HARQ response information.
  • the processing unit is configured to: instruct the terminal to send data according to the TTI length change instruction, where the terminal is configured to determine the updated time-frequency resource according to the TTI length change command, and the updated time-frequency resource Send at least two data on.
  • the at least two pieces of data are sent by using a binding mode or a multiplexing mode; or the at least two pieces of data carry implicit data identification information or explicit data identification information; or the at least two pieces of data are The network device pre-agreed data to be transmitted; or the at least two data is data whose size of the used transport block TB matches the current TTI length; the at least two data are data selected by the terminal; the at least two The data is data before the TTI length change and/or after the TTI length is changed; the at least two data are data selected in a preset priority order.
  • the TTI length change includes: the TTI length is changed within 1 ms; or the TTI length is changed between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is shorter than 1 ms. Change within.
  • the sending unit is further configured to: after receiving the feedback information that the network device performs the automatic retransmission request HARQ feedback on the data after the TTI length change command takes effect, the sending unit is further configured to:
  • the HARQ identifier or the data identifier sent by the sending unit is sent by using downlink control information DCI. Or the HARQ identifier or the data identifier sent by the sending unit is associated with the location information of the physical hybrid automatic request retransmission indication channel PHICH.
  • the processing unit is further configured to: instruct the terminal to acquire a time-frequency resource that transmits the HARQ feedback information by using a time-frequency resource of a transport block that transmits the HARQ identifier and/or the HARQ feedback information.
  • the time-frequency resource includes time information of a short TTI less than 1 ms.
  • the processing unit is further configured to: after the terminal obtains the HARQ feedback information, perform the synchronous HARQ based on the changed TTI.
  • the network device involved in the eleventh aspect may include a processing unit, and the sending unit may be a transceiver.
  • the processor is configured to support a network device to perform a corresponding function in the above method, the transceiver being configured to support communication between a network device and a terminal or other network entity.
  • the network device may further include a memory for coupling with the processor, which stores program instructions and data necessary for the network device.
  • the network device may be a base station device.
  • a terminal having a function of implementing the behavior of the terminal in the above tenth aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal comprises a receiving unit and a transmitting unit.
  • the receiving unit is configured to receive a transmission time interval TTI length change command sent by the network device, where the TTI length change instruction is used to indicate that a TTI length on the communication link for transmitting and/or receiving data of the terminal is changed.
  • the sending unit is configured to send data according to the TTI length change instruction.
  • the sending unit sends data according to the TTI length change command in the following manner: if the receiving unit receives the uplink grant time after receiving the TTI length change instruction time, or Receiving, by the receiving unit, the uplink grant and the TTI length change command, the sending unit sends data on the communication link whose length of the TTI is changed according to the uplink grant. And if the receiving unit receives the uplink grant time before receiving the TTI length change instruction time, the sending unit discards the time-frequency resource corresponding to the uplink grant.
  • the receiving unit is further configured to: before the sending unit sends data according to the TTI length change command, receive indication information that is sent by the network device to indicate whether the uplink authorization is valid or not.
  • the sending unit is further configured to send the TB data carrying the hybrid automatic repeat request HARQ identifier on the UL authorized resource.
  • the receiving unit is further configured to: before the sending unit sends data according to the TTI length change command, receive physical layer information sent by the network device, where the physical layer information is used to indicate that data is sent according to an uplink grant. , or send data according to the TTI after the length is changed.
  • the receiving unit is further configured to receive an uplink grant retransmitted by the network device before the sending unit sends the data according to the TTI length change command.
  • the sending unit specifically sends the data according to the TTI length change instruction in the following manner:
  • the updated time-frequency resource is determined according to the TTI length change command, and the data is sent on the updated time-frequency resource.
  • the updated time-frequency resource is one of the at least two time-frequency resources mapped by the time-frequency resource that sends the HARQ response information before the TTI length change on the communication link after the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain location of the at least two time-frequency resources is the highest a time-frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a time-frequency resource start position in the at least two time-frequency resources before the TTI length is changed And transmitting a time-frequency resource after the start position of the time-frequency resource of the HARQ response information.
  • the sending unit specifically sends the data according to the TTI length change instruction in the following manner:
  • the updated time-frequency resource is determined according to the TTI length change command, and at least two data are sent on the updated time-frequency resource.
  • the at least two pieces of data are sent by using a binding mode or a multiplexing mode; or the at least two pieces of data carry implicit data identification information or explicit data identification information; or the at least two pieces of data are The network device pre-agreed data to be transmitted; or the at least two data is data whose size of the used transport block TB matches the current TTI length; the at least two data are data selected by the terminal; the at least two The data is data before the TTI length change and/or after the TTI length is changed; or the at least two data are data selected in a preset priority order.
  • the TTI length change includes: changing a TTI length within 1 ms; or changing a TTI length between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI less than 1 ms.
  • the receiving unit is in the The receiving unit is further configured to: after receiving the feedback information that the network device performs the automatic retransmission request HARQ feedback on the data after the TTI length change command takes effect, the receiving unit is further configured to:
  • a HARQ identifier for performing HARQ feedback on the data or a data identifier for performing HARQ feedback on the data or receiving indication information sent by the network device, where the indication information is used to indicate whether the data is performed
  • the HARQ feedback HARQ identifier or the data identifier for indicating whether to perform HARQ feedback on the data or the first HARQ feedback information of the HARQ feedback information sent by the network device and performing HARQ feedback on the data Or high priority HARQ feedback information.
  • the receiving unit receives the HARQ identifier or the data identifier by using downlink control information DCI.
  • the HARQ identifier or the data identifier is associated with the location information of the physical hybrid automatic request retransmission indication channel PHICH.
  • the receiving unit is further configured to acquire a time-frequency resource that transmits the HARQ feedback information by using a time-frequency resource of a transport block that transmits the HARQ identifier and/or the HARQ feedback information.
  • the time-frequency resource includes time information of a short TTI less than 1 ms.
  • the sending unit performs synchronous HARQ based on the changed TTI.
  • the receiving unit of the terminal involved in the twelfth aspect may be a receiver, and the transmitting unit may be a transmitter.
  • the terminal can also include a processor and a memory for coupling with the processor, which stores program instructions and data necessary for the terminal.
  • the terminal may further include an antenna.
  • the communication method, the network device, and the terminal of the foregoing aspects of the embodiments of the present invention can ensure correct transmission and correct reception of data packets in the DL HARQ process and the UL HARQ process under the condition that the TTI length is changed.
  • FIG. 1 is a schematic structural diagram of a wireless system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a system for performing data transmission between a UE and an eNB in a radio access network in an LTE network;
  • FIG. 3 is a flowchart of implementing a first communication method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of an implementation of a second communication method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of another implementation of a second communication method according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of still another implementation of a second communication method according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of implementing a third communication method according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of implementing a fourth communication method according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of determining a location of a time-frequency resource in an embodiment of the present invention.
  • FIG. 10 is a flowchart of implementing a fifth communication method according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a network device according to a first embodiment of the present invention.
  • FIG. 12 is another schematic structural diagram of a network device according to a first embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a terminal according to a first embodiment of the present invention.
  • FIG. 14 is another schematic structural diagram of a terminal according to a first embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a network device according to a second embodiment of the present invention.
  • FIG. 16 is a schematic structural diagram of another network device according to a second embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a terminal according to a second embodiment of the present invention.
  • FIG. 18 is another schematic structural diagram of a terminal according to a second embodiment of the present invention.
  • FIG. 19 is a schematic structural diagram of a network device according to a third embodiment of the present invention.
  • FIG. 20 is another schematic structural diagram of a network device according to a third embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of a terminal according to a third embodiment of the present invention.
  • FIG. 22 is a schematic structural diagram of another terminal according to a third embodiment of the present invention.
  • FIG. 23 is a schematic structural diagram of a network device according to a fourth embodiment of the present invention.
  • FIG. 24 is a schematic structural diagram of another network device according to a fourth embodiment of the present invention.
  • FIG. 25 is a schematic structural diagram of a terminal according to a fourth embodiment of the present invention.
  • FIG. 26 is a schematic structural diagram of another terminal according to a fourth embodiment of the present invention.
  • the terminal accesses an IP Multimedia Subsystem (IMS) network through a Radio Access Network (RAN) and a Core Network (CN).
  • IMS IP Multimedia Subsystem
  • RAN Radio Access Network
  • CN Core Network
  • the communication method is mainly directed to a process of data transmission between a terminal and a network device in a radio access network.
  • the terminal may include various handheld devices having wireless communication functions Equipment, in-vehicle equipment, wearable equipment, computing equipment or other processing equipment connected to a wireless modem, and various forms of User Equipment (UE), Mobile Station (MS), Terminal Equipment (Terminal Equipment) and many more.
  • the network device may include various devices that provide communication functions for the terminal in the radio access network, such as a base station, which may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In a system using different radio access technologies, the name of the base station may be different. For example, in a Long Term Evolution (LTE) network, an evolved NodeB (evolved NodeB, eNB or eNodeB for short) In the third generation 3G network, it is called Node B and so on.
  • LTE Long Term Evolution
  • eNB evolved NodeB
  • eNodeB evolved
  • the technology described in this embodiment of the present invention may be applicable to an LTE system, or other wireless communication systems using various radio access technologies, for example, using code division multiple access, frequency division multiple access, time division multiple access, and orthogonal frequency division multiple access.
  • a system of access technologies such as single carrier frequency division multiple access.
  • it can also be applied to the subsequent evolution system using the LTE system, such as the fifth generation 5G system and the like.
  • the terminal is a UE
  • the network device is an eNB.
  • FIG. 2 is a schematic diagram of a system for data transmission between a UE and an eNB in a radio access network in an LTE network.
  • the Hybrid Automatic Repeat ReQuest (HARQ) process is used to improve the reliability of data transmission.
  • the DL HARQ process and the UL HARQ process are mainly described.
  • the eNB sends a data packet to the UE, and after receiving the data packet, the UE performs HARQ feedback on the received data packet and sends a HARQ feedback message.
  • the HARQ feedback message includes a Correct Answer (ACK) or Negative ACKnowledge (NACK) information.
  • ACK Correct Answer
  • NACK Negative ACKnowledge
  • the UE sends a data packet to the eNB, and the eNB receives the data packet sent by the UE and transmits a HARQ feedback message.
  • the TTI length may change due to the service requirement.
  • the DL HARQ process and the UL HARQ process may cause incorrect reception or incorrect transmission of the data packet, thereby causing the transmission rate and the transmission rate.
  • the system capacity has dropped.
  • the embodiment of the invention provides a communication method for ensuring correct transmission and correct reception of data packets in a DL HARQ process and a UL HARQ process in a case where a TTI length is changed.
  • FIG. 3 is a diagram showing a first communication method according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • the eNB determines that the length of the TTI on the communication link changes.
  • the communication link in which the TTI length is changed in the embodiment of the present invention may be a link between the network device and the UE, or may be a link between the UE and the UE, and the link includes an uplink and a downlink.
  • the uplink and downlink may use Time Division Duplex (TDD) to transmit data, and may also use Frequency Division Duplex (FDD) to transmit data.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the TTI length change includes changing the TTI length within 1 ms; or the TTI length is changed between a short TTI and a 1 ms TTI lower than 1 ms; or the TTI length is changed within a short TTI lower than 1 ms.
  • the length of the TTI may be changed to be different from the original TTI, or may be changed to the same length as the original TTI.
  • the eNB determines that the transport block (TB) before the TTI length change cannot be transmitted on the communication link after the TTI length is changed.
  • each HARQ process occupies one TB or two TBs in uplink or downlink transmission.
  • This TB has been configured with resource allocation and code modulation according to the TTI before the change, and the changed TTI may not be able to use this resource allocation and code modulation method, that is, the TB before the TTI length change cannot be changed after the TTI length change. Transfer on the link.
  • S103 may be performed if the TB before the TTI length change cannot be transmitted on the communication link after the TTI length is changed.
  • the eNB sends indication information to the UE, where the indication information is used to indicate that the TB of the at least one HARQ process is cleared.
  • the TB of the HARQ process is cleared, and all the TBs in the HARQ process may be cleared, or one TB or two TBs in the HARQ process may be cleared, or the HARQ may be The TB specified in the process is cleared.
  • the indication that the clearing of the HARQ process may be to clear the TB of the at least one HARQ process of one UE, or to clear the TB of the at least one HARQ process of the group of UEs; Or clear the TB of at least one HARQ process of the cell.
  • the at least one HARQ process may be all HARQ processes or a specified HARQ process.
  • the specified HARQ process is a process that specifies a HARQ identity, or a HARQ process that meets a quality of service (QoS) requirement.
  • QoS quality of service
  • the indication information in the embodiment of the present invention may be a Radio Resource Control (RRC) message, a broadcast message, and a Medium Access Control (MAC) control element (Control Element, CE). And at least one or combination of physical layer signaling, sent in an explicit manner or in an implicit manner.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • the indication information is sent by the physical layer signaling
  • the indication information is implicitly sent by the resource where the physical layer signaling is located; or the indication information is included in the Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the eNB in the embodiment of the present invention may indicate, by using a display or an implicit manner, that the UE clears the TB of the at least one HARQ process.
  • the UE receives the indication information that is sent by the eNB to indicate that the TB of the at least one HARQ process is cleared, and clears the TB of the at least one HARQ process of the UE according to the indication information.
  • the eNB may send the indication information that the TB of the HARQ process is cleared to the UE, so that the UE will perform the HARQ process.
  • the TB in the field is cleared, and the data is retransmitted in the TB of the changed TTI length to ensure the correct transmission and reception of the data.
  • FIG. 4 is a schematic diagram of a second communication method according to an embodiment of the present invention, as shown in FIG. 4, including:
  • the eNB determines that the length of the TTI on the communication link changes.
  • the eNB sends indication information to the UE, where the indication information is used to indicate that the communication is performed on the frequency domain resource where the changed TTI length is located.
  • the instructing to communicate with the UE on the frequency domain resource where the changed TTI length is located refers to discarding the frequency domain resource before the TTI length change, and the frequency domain resource where the changed TTI length is located.
  • the communication with the UE is performed, wherein the data communicated with the UE is TB-related transmitted and/or received data of the HARQ process before the TTI length change.
  • the UE receives the indication information sent by the eNB, and performs communication on the frequency domain resource where the changed TTI length is located according to the indication information.
  • the frequency domain resource before the TTI length change that the eNB has configured to the UE is discarded according to the indication information, and the eNB is in communication with the eNB on the frequency domain resource after the TTI length is changed, where the eNB communicates with the eNB.
  • the data is data transmitted and/or received on the TB of the HARQ process before the TTI length change.
  • the eNB may indicate, by using at least one or a combination of the RRC message, the broadcast message, the MAC CE, and the physical layer signaling, that the communication is performed on the frequency domain resource where the changed TTI length is located.
  • Information is sent explicitly or implicitly.
  • the UE receives the data in the corresponding manner.
  • the indication information used to indicate that the communication on the frequency domain resource where the changed TTI length is located is sent by using physical layer signaling
  • the indication information may be sent by the DCI.
  • the DCI further carries at least one or a combination of a HARQ identifier and a modulation and coding scheme MCS corresponding to the data information.
  • the eNB and the UE may further include the following steps, as shown in FIG. 5:
  • S204 The eNB receives data sent by the UE.
  • the eNB sends the HARQ feedback information according to the changed TTI length on the downlink, and sends the HARQ identification information of the HARQ feedback information to the UE.
  • the UE receives the HARQ feedback information sent by the eNB and the HARQ identification information of the HARQ feedback information, and performs HARQ processing according to the HARQ identification information of the HARQ feedback information and the state of the HARQ process before the TTI length change.
  • the HARQ identification information of the HARQ feedback information and the TTI in the embodiment of the present invention may be the same or different.
  • the UE can associate the HARQ identification information before the change and the HARQ identification information of the HARQ feedback information to one HARQ process.
  • the HARQ feedback information includes a HARQ ACK or a HARQ NACK.
  • the following steps may also be included, as shown in FIG. 6 :
  • the eNB sends the uplink grant information to the UE, and sends the HARQ identifier information corresponding to the uplink grant information to the UE.
  • the UE receives the uplink grant information sent by the eNB and the HARQ identifier information of the uplink grant information, and performs HARQ processing according to the HARQ identifier information of the uplink grant information and the state of the HARQ process before the TTI length change.
  • the HARQ process is at least two HARQ processes
  • the at least two HARQ processes may be combined.
  • the eNB when the length of the TTI is changed, the eNB sends the indication information indicating that the communication is performed on the frequency domain resource where the changed TTI length is located, so that the UE may discard the TTI length change according to the indication information.
  • the previous data, and communication on the frequency domain resources where the changed TTI length is located, can avoid the wrong transmission and misreception of the data packet.
  • FIG. 7 is a third communication method according to an embodiment of the present invention. As shown in FIG. 7, the method includes:
  • S301 The eNB determines that the length of the TTI on the communication link changes.
  • the eNB sends, to the UE, indication information for instructing the UE to change according to the TTI length, and performing communication on the communication link according to the changed TTI length.
  • the communication in the embodiment of the present invention includes transmission, reception, or transmission and reception of data packets, which are indicated as transmission and/or reception of data packets.
  • the effective time is such that the UE can perform the transmission and/or reception of the data packet communicated with the eNB to the greatest extent before the communication according to the changed TTI length, so as to avoid sending and/or receiving the data packet.
  • the frequency resource position changes before and after the TTI length change.
  • the effective time of the embodiment of the present invention may be in various forms, for example, may be used to indicate that the UE uses the start time of the TTI after the length change on the communication link, and may be a UE.
  • the received offset time information is represented by the offset value of the start, and may also be represented by the timing time when the UE receives the effective time information as the start.
  • the start time of the effective time may be represented by an absolute time, and the start time of the effective time may also be represented by a radio frame and a subframe number.
  • the effective time may be pre-configured on the UE, or may be sent by the eNB to the UE.
  • the effective time in the embodiment of the present invention may be that the eNB sends the UE to the UE in advance, or may be sent to the UE in real time after determining that the TTI length is changed.
  • the eNB may send the activation indication information for activating the effective time to the UE, and activate the effective time to indicate that the UE changes according to the effective time of the TTI length change, according to the change on the communication link.
  • the length of the TTI is communicated.
  • the effective time of the embodiment of the present invention is an effective time for one UE, or an effective time for a cell, or an effective time for a group of UEs.
  • multiple effective times may be set. If the number of preset effective times is more than one, that is, the number of effective times is at least two, the eNB may send indication information to the UE to indicate that the UE is at least An effective time is selected from the two effective times, and the UE is instructed to send and/or receive data according to the changed TTI length on the communication link according to the selected effective time.
  • the eNB may also select an effective time in the at least two effective times, and send and/or indicate the effective time of the selection. Describe the UE, and instruct the UE to send and/or receive data according to the changed TTI length on the communication link according to the selected effective time.
  • the eNB involved in the embodiment of the present invention instructs the UE to perform a corresponding operation, which may be understood as an eNB sending an instruction or a message to the UE, and instructing the UE to perform a corresponding operation by using the instruction or the message.
  • the eNB instructs the UE to perform communication according to the changed TTI length on the communication link according to the effective time of the TTI length change, and may send one to the UE through the eNB.
  • the message indicates the effective time of the TTI length change by using the message, and instructs the UE to start using the changed TTI length to start communication at the effective time.
  • the eNB involved in the foregoing embodiment sends the effective time, the activation indication information, or other indication information to the UE, and may be in an explicit manner by using at least one or a combination of an RRC message, a broadcast message, a MAC CE, and a physical layer signaling. Send or send in an implicit manner.
  • the effective time and the activation indication information may be sent in the downlink control information DCI, or implicitly transmitted by using a time-frequency resource of the DCI. Or implicitly transmitted using DCI's scrambling code.
  • the scrambling code is scrambled on the DCI, does not occupy the physical resources of the DCI, and can transmit the required information to the terminal.
  • the effective time and the activation indication information are implicitly transmitted by using the time-frequency resource of the DCI, the effective time may be mapped by using the video resource location.
  • n ru is an index value of the first radio unit where the downlink control information of the UE is located
  • N is used to indicate the number of optional lifetimes
  • n is the sequence number of the selected lifetime
  • m is the network side.
  • mod() represents the remainder operation.
  • the UE receives the indication information sent by the UE, and performs communication according to the changed TTI length on the communication link according to an effective time of the TTI length change.
  • the UE may activate the effective time set in advance on the UE or the effective time that the active eNB sends to the UE by receiving the activation indication information sent by the eNB.
  • the UE may use the changed TTI length on the communication link according to an effective time selected in the at least two effective times. Send and/or receive data.
  • the UE may select one effective time in the at least two effective times, or receive an effective time selected and sent or indicated by the eNB.
  • the eNB when the TTI length is changed, instructs the UE to change according to the TTI length.
  • the effective time, communication on the communication link after the length of the TTI is changed, so that the UE can complete the transmission and/or reception of the data packets communicated with the eNB to the greatest extent, so as to avoid sending and/or receiving data packets.
  • the time-frequency resource location changes before and after the TTI length change, thereby avoiding packet mis-transmission and mis-reception.
  • FIG. 8 is a fourth communication method according to an embodiment of the present invention. As shown in FIG. 8, the method includes:
  • S401 The eNB determines that the length of the TTI on the communication link changes.
  • the eNB sends the TTI length change information to the UE, and instructs the UE to update the time-frequency resource for transmitting the HARQ feedback information on the communication link according to the TTI length change information, and the updated time-frequency resource. Sending the HARQ feedback information on.
  • the eNB may send the TTI length change information in an explicit manner or implicitly through at least one or a combination of an RRC message, a broadcast message, a MAC CE, and a physical layer signaling.
  • the TTI length change message may be included in the updated time-frequency resource.
  • the TTI length change information is TTI length change information of at least one HARQ process of one UE, TTI length change information of at least one HARQ process of a group of UEs, or TTI length change information of at least one HARQ process of a cell.
  • the UE receives the transmission time interval TTI length change information on the communication link sent by the eNB, and updates the time-frequency resource of the HARQ feedback information on the communication link according to the TTI length change information, and the updated time Transmitting the HARQ feedback information on the time-frequency resource.
  • the UE may update and send the HARQ feedback information on the communication link according to the TTI length change information after determining the time when the HARQ feedback information is originally sent, after the TTI length change time. Time-frequency resources.
  • the time-frequency resource of the HARQ feedback information is updated on the communication link according to the TTI length change information, and the HARQ feedback information is sent on the updated time-frequency resource.
  • Manner 1 The eNB and the UE negotiate to determine the updated time-frequency resource: the HARQ reverse is sent on the communication link after the TTI length is changed, the time-frequency resource location, and the TTI length change.
  • the time-frequency resource of the TTI of the time-frequency resource of the feed information is closest to the time-frequency resource at the time-frequency resource start time position or after the time-frequency resource time start position.
  • the start position of the TTI of the time-frequency resource for transmitting the HARQ feedback information before the TTI length change is the time domain symbol with the label of 1, and the time-frequency resource after the TTI length is changed
  • the time domain symbol with the label 1 being the closest to the start of the time domain symbol is the time domain symbol with the label 2
  • the updated time-frequency resource may be the time domain labeled 2 and the label 3 and 4 thereafter.
  • Manner 2 The eNB and the UE preset the correspondence between the downlink TTI length and the uplink TTI length and the indicated location, and negotiate to determine that the updated time-frequency resource is: the downlink after the TTI length is changed.
  • the value in the indicated location in Table 1 refers to the downlink/uplink TTI length after the configuration. If the transport block is obtained in the subframe N, the N+6TTI UE sends the HARQ feedback to the eNB, where the value 6 is the TTI.
  • the number includes the existing 1ms TTI and the short TTI number. Other values or K have the same meaning as above.
  • the HARQ feedback may be sent on the time-frequency resource at the indicated location indication according to the indicated location in the preset correspondence. information.
  • Manner 3 The eNB and the UE preset an offset relationship between the downlink TTI length and the uplink TTI length after the TTI length is changed, and negotiate to determine that the updated time-frequency resource is: the time-frequency resource location and the TTI. After the length is changed, the downlink TTI length and the indicated position corresponding to the uplink TTI length have a time-frequency resource with a set offset.
  • the time-frequency resource having the set offset amount of the time-frequency resource position and the TTI length and the uplink TTI length corresponding to the indicated position of the uplink TTI length can be understood as adding the set offset on the basis of the second mode. Indicate the location, as shown in Table 2:
  • K1, K2, ..., K7 in Table 2 refer to the offset, and the value of the offset can be as shown in Table 3:
  • the offset in the embodiment of the present invention may be sent by the eNB to the UE; or may be preset to the UE and the eNB; or may be determined by the UE and sent to the eNB. Or jointly negotiated by the UE and the eNB.
  • Manner 4 The eNB and the UE preset the downlink TTI length and the uplink TTI length before the TTI length change, the downlink TTI length and the uplink TTI length after the TTI length change, and have a preset correspondence with the indicated location. relationship.
  • the eNB and the UE determine the updated time-frequency resource: the downlink TTI length and the uplink TTI length before the TTI length change, the downlink TTI length after the TTI length change, and the time-frequency at the indicated position corresponding to the uplink TTI length. Resources.
  • a reasonable offset may be used to set the indication position.
  • the offset refers to a TTI length bit before the TTI length is changed.
  • the offset is mapped to the position at the position after the TTI length change.
  • the offset between the downlink TTI length and the uplink TTI length before the TTI length change and the downlink TTI length and the uplink TTI length after the TTI length change may be as shown in Table 4 below:
  • the updated time-frequency resource may be: one time-frequency resource of at least two time-frequency resources mapped on the communication link after the TTI length change is sent before the TTI length is changed. .
  • the time-frequency resources mapped on the communication link after the TTI length is changed, for example, the situation shown in FIG. Select one of the mapped multiple time-frequency resources.
  • one time-frequency resource determined in the at least two time-frequency resources may be: any one of the at least two time-frequency resources; or a time-domain location of the at least two time-frequency resources The most advanced time-frequency resource; or one time-frequency resource specified by the eNB in the at least two time-frequency resources; or the time-frequency resource start position in the at least two time-frequency resources is in the TTI length
  • the time-frequency resource after the start of the time-frequency resource of the HARQ feedback information is sent before the change.
  • the rounding operation of the time domain symbol in the time-frequency resource mapped on the communication link after the TTI length change is applied to the time-frequency resource that sends the HARQ feedback information before the TTI length change is used.
  • determining, in the at least two time-frequency resources, a time-frequency resource after the time-frequency resource start position is sent before the TTI length change before the time-frequency resource start position of the HARQ feedback information is sent.
  • the time domain symbol for transmitting the HARQ feedback information before the TTI length change is 20, and the time-frequency resource for transmitting the HARQ feedback information before the TTI length change is in the time-frequency resource mapped on the communication link after the TTI length is changed.
  • the time domain symbols are labeled 19 and 23, and after the 19 and 23 pairs 20 are rounded, it can be determined that the time-frequency resource corresponding to the time domain symbol of 23 is the time-frequency resource starting position before the TTI length is changed. Transmitting a time-frequency resource after the start position of the time-frequency resource of the HARQ feedback information.
  • the at least two HARQ feedback messages may be sent in the following manner:
  • the at least two HARQ feedback messages are sent in a binding manner or in a multiplexing manner; or the at least two HARQ feedback messages carry implicit HARQ identification information or explicit HARQ identification information; or the at least two HARQ feedbacks
  • the message is a HARQ feedback message that needs to be sent by the eNB in advance; or the at least two HARQ feedback messages are HARQ feedback messages whose size of the used TB matches the current TTI length; or the at least two HARQ feedback messages are The UE-selected HARQ feedback message; or the at least two HARQ feedback messages are HARQ feedback messages before TTI length change and/or TTI length change; or the at least two
  • the HARQ feedback message is a HARQ feedback message selected in a preset priority order.
  • the specific time domain resource location sent by the at least two HARQ feedback messages in the updated time-frequency resource by using the binding mode or the multiplexing mode may be arbitrarily selected in the updated time-frequency resource, or may be predefined. It can also be configured by the eNB.
  • the specific time domain resource location for transmitting the HARQ feedback message in the updated time-frequency resource by using the binding mode or the multiplexing mode may be determined by using the manner of the following:
  • 1 in 1/2/3 of Table 6 indicates arbitrary selection, 2 indicates pre-defined, and 3 indicates configuration by the eNB.
  • Manner 7 The eNB sends the updated time-frequency resource location to the UE by the eNB; or presets the updated time-frequency resource location on the UE and the eNB; or determines, by the UE
  • the updated time-frequency resource location is sent to the eNB; or the updated time-frequency resource location is jointly negotiated by the UE and the eNB.
  • the time-frequency resource location in the embodiment of the present invention may be through an RRC message, a broadcast message, or At least one or a combination of MAC CE and physical layer signaling is sent in an explicit manner or in an implicit manner.
  • time-frequency resource location may be a specific time-frequency resource location information of the UE, or may be a specific time-frequency resource location information of the cell, or may be specific time-frequency resource location information of the UE HARQ process.
  • Manner 8 The UE sends the HARQ feedback information of the correct response (ACK) on the updated time-frequency resource, and does not send the HARQ feedback information of the error acknowledgement (NACK). If the eNB does not receive the HARQ feedback information sent by the UE, send a clear indication to the UE to clear the TB of the HARQ process of the UE, or clear the HARQ process of the UE, and the UE receives the clear indication sent by the eNB, according to The clear indication clears the TB of the UE's HARQ process, or clears the UE's HARQ process.
  • ACK correct response
  • NACK error acknowledgement
  • Mode 9 The HARQ identifier selected and sent by the eNB, and the downlink TTI length and the uplink TTI length information after the TTI length is changed, so that the UE determines the changed time frequency according to the downlink TTI length and the uplink TTI length information after the TTI length is changed.
  • the resource is sent, and the HARQ response information corresponding to the HARQ identifier indicated by the eNB is sent on the updated time-frequency resource.
  • Manner 10 The UE sends the HARQ feedback information in the form of asynchronous HARQ, and explicitly or implicitly includes the HARQ identification information in the HARQ feedback information sent on the updated time-frequency resource.
  • the updated time-frequency resource includes a physical layer uplink control channel (PUCCH) or a physical layer uplink shared channel (Physical Uplink Share Channel, PUSCH).
  • PUCCH and the PUSCH include a PUCCH and a PUSCH on the sTTI.
  • mapping relationship of the HARQ identifier on the time-frequency resource may satisfy the following formula:
  • the HARQID is a HARQ identifier
  • f(n PUCCH ) represents a function with n PUCCH as an input variable
  • f(n PUSCH ) represents a function with n PUSCH as an input variable
  • n PUCCH represents a resource position correlation value of the PUCCH
  • n PUSCH represents The value of the location of the resource where the PUSCH is located
  • mode represents the modulo operation
  • number (HARQ) represents the number of HARQ processes.
  • the UE can use the updated time-frequency resource feedback HARQ feedback message determined by the foregoing manner to prevent the time-frequency resource location of the transmitted and/or received data packets from being changed before and after the TTI length change. The occurrence of a change, in order to avoid the wrong and wrong receipt of the packet.
  • FIG. 10 is a fifth communication method according to an embodiment of the present invention. As shown in FIG. 10, the method includes:
  • S501 The eNB determines that the length of the TTI on the communication link changes.
  • the eNB sends the TTI length change information to the UE.
  • the eNB sends a new TB or a retransmission TB based on the TB of the HARQ before the TTI length change.
  • S504 Acquire a new TB or a retransmission TB sent by the eNB, and stop sending the HARQ feedback information.
  • S505 The UE performs joint decoding based on the newly transmitted TB or the retransmission TB and the TB before the TTI length change to obtain the TB information after the TTI length is changed.
  • the eNB sends a new TB or a retransmission TB to the UE, and the UE performs joint decoding to obtain the TB information after the TTI length is changed based on the newly transmitted TB or the retransmission TB and the TB before the TTI length change.
  • the TB information after the TTI length change continues to communicate, and the time-frequency resource position of the transmission and/or reception of the data packet can be prevented from changing before and after the TTI length change, thereby avoiding the mis-transmission and mis-reception of the data packet.
  • the process in which the UE needs to send a data packet to the eNB mainly involves the UE receiving the uplink grant (UL grant) sent by the eNB, preparing to send the PUSCH, and preparing the UE to retransmit the TB.
  • UL grant uplink grant
  • Embodiments of the present invention will be directed to the above two processes, in the process of changing the length of the TTI, The implementation process of avoiding packet mis-sending and mis-reporting is explained.
  • the eNB when the eNB and the UE determine that the TTI length is changed, transmits a TTI length change command for changing the TTI length on the communication link for instructing the UE to transmit and/or receive data to the UE.
  • the UE performs corresponding processing according to the TTI length change command for receiving the change of the TTI length on the communication link for instructing the UE to transmit and/or receive data, and the time when the uplink grant is received. If the time when the UE receives the uplink grant is after receiving the TTI length change instruction time, or the UE receives the uplink grant and the TTI length change command at the same time, the UE is based on The uplink grant transmits data on a communication link whose length of the TTI is changed. If the UE receives the uplink grant time before receiving the TTI length change instruction time, the UE discards the time-frequency resource corresponding to the uplink grant.
  • the eNB and the UE determine that the TTI length is changed, the eNB transmits a TTI length change command for changing the TTI length on the communication link for instructing the UE to transmit and/or receive data to the UE, and the UE Receiving the TTI length change command and receiving the indication information that is sent by the network device to indicate whether the uplink grant is valid or not, and if the uplink grant is valid, using the uplink grant to change the length of the TTI Send data on the link. If the uplink grant is invalid, the time-frequency resource corresponding to the uplink grant is discarded.
  • the eNB may send physical layer information to the UE, and the physical layer information indicates that the UE sends data according to the uplink grant, or sends the data according to the length change TTI. .
  • the UE receives the physical layer information sent by the network device, sends data according to the uplink authorization according to the physical layer information, or sends data according to the TTI after the length change.
  • the eNB may resend the uplink grant to the UE, and the UE receives the uplink grant retransmitted by the network device, and according to the retransmitted uplink grant, Data is transmitted on the communication link after the TTI length is changed.
  • the data that is sent by the UE on the communication link whose length of the TTI is changed by using the uplink authorization may be the TB data carrying the HARQ identifier.
  • the UE uses the uplink grant to transmit data on the communication link whose length of the TTI is changed, if there are multiple time-frequency resource locations for transmitting data, refer to the method 5 in the foregoing embodiment.
  • the embodiments of the present invention can avoid packet mis-transmission caused by a change in the length of the TTI in the UL HARQ process by using the foregoing possible implementation manners.
  • the eNB when the eNB sends the HARQ feedback information to the UE, the current HARQ is reduced due to the physical hybrid automatic request retransmission indication channel (Physical HARQ Indication Channel, PHICH). Therefore, if the TTI length is low, The short TTI of 1 ms is changed to 1 ms TTI, and the UE switches from listening to the Physical Downlink Control Channel (PDCCH) and the Short Physical Downlink Control Channel (PDCCH) to the listening PHICH channel, and the UE listens to each PHICH.
  • PDCCH Physical Downlink Control Channel
  • PDCCH Short Physical Downlink Control Channel
  • the two sTTIs use the same Resource Allocation (RA) to transmit the TB, and the PHICH determines the UE information corresponding to the HARQ feedback according to the RA sent by the UE, causing the PHICH to collide when transmitting the HARQ feedback message, thereby making The UE cannot determine which process is HARQ specifically received.
  • the collision occurs in the embodiment of the present invention.
  • the short TTI configuration is less than 1 ms, at least two TTIs obtain the TB in the same frequency domain resource when receiving the data on the network side, so that the UE needs the 1 ms TTI after the TTI change.
  • the same location of the PHICH of the eNB receives two TTI HARQ feedback messages.
  • the eNB sends a HARQ identifier that performs HARQ feedback on the received data or a data identifier that performs HARQ feedback on the received data
  • the UE receives the HARQ identifier or the pair that is sent by the eNB and performs HARQ feedback on the data.
  • the data carries the data identifier of the HARQ feedback, and the specific HARQ can be determined according to the HARQ identifier or the data identifier of the HARQ feedback.
  • the network device sends indication information, where the indication information is used to indicate that A HARQ indicator that performs HARQ feedback on the received data or a data identifier that indicates whether to perform HARQ feedback on the received data.
  • the UE receives the indication information sent by the network device, and according to the indication information, can determine whether there is HARQ feedback corresponding to the data of the HARQ identifier or the data identifier, and further determine a specific HARQ.
  • the HARQ identifier or the data identifier may be sent and received by using a DCI, and the HARQ identifier or the data identifier may also be associated with location information of the PHICH.
  • the network device may send feedback of the first HARQ that conflicts in the HARQ feedback information that performs HARQ feedback on the data or feedback of the high priority HARQ, thereby avoiding occurrence of HARQ collision.
  • the UE may obtain a time-frequency resource for transmitting the HARQ feedback information by transmitting a time-frequency resource of a TB associated with the HARQ identifier and/or the HARQ feedback information.
  • the UE maps the HARQ identifier to the time-frequency resource of the HARQ feedback information, and the UE acquires the HARQ feedback information at the time-frequency resource of the HARQ feedback information corresponding to the HARQ identifier.
  • the UE when the UE uses the TB time-frequency resource corresponding to the HARQ feedback information, the UE implicitly indicates to the eNB the time-frequency resource location of the subsequent received HARQ feedback that is required by the eNB, and the eNB obtains the UE to send.
  • the HARQ feedback information is sent at the corresponding location.
  • the time-frequency resource may include time information of a short TTI less than 1 ms.
  • the UE transmits the HARQ feedback information according to the acquired time-frequency resource.
  • the UE can perform synchronous HARQ by using the changed TTI as a reference.
  • the solution provided by the embodiment of the present invention is mainly introduced from the perspective of interaction between the network device and the terminal.
  • the network device and the terminal include corresponding hardware structures and/or software modules for performing the respective functions.
  • the embodiments of the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present invention.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 11 is a schematic structural diagram of a possible network device 100 according to an embodiment of the present invention.
  • the network device 100 has a function of realizing the behavior of the network device 100 in the first communication method and the second communication method described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device 100 includes a processing unit 101 and a sending unit 102, where the processing unit 101 is configured to determine that a transmission time interval TTI length on a communication link is changed, and determine indication information, where the indication information is used.
  • the transport block TB indicating that the at least one hybrid automatic repeat request HARQ process is cleared is used, or is used to indicate that the terminal communicates with the terminal on the frequency domain resource where the changed TTI length is located.
  • the sending unit 102 is configured to send the indication information determined by the processing unit 101 to the terminal.
  • the processing unit 101 is further configured to determine the TTI length before the sending unit 102 sends the indication information to the terminal.
  • the TB before the change cannot be transmitted on the communication link after the TTI length is changed.
  • the processing unit 101 is specifically configured to: clear the TB of the at least one HARQ by clearing: clearing the TB of the at least one HARQ process of one terminal; or at least one HARQ process of the group of terminals. TB is cleared; or the TB of at least one HARQ process of the cell is cleared.
  • the at least one HARQ process is a full HARQ process, or a specified HARQ process.
  • the specified HARQ process is a process that specifies a HARQ identity, or a HARQ process that meets a quality of service QoS requirement.
  • the processing unit 101 is specifically configured to indicate the length of the changed TTI as follows. Communicating with the terminal on the frequency domain resource: indicating to discard the frequency domain resource before the TTI length change, and communicating with the terminal on the frequency domain resource where the changed TTI length is located, where the data is HARQ before the TTI length change The data on the TB of the process.
  • the processing unit 101 is further configured to: send, by the sending unit 102, the indication information to the terminal. Then, the data sent by the terminal is acquired.
  • the sending unit 102 is further configured to send the HARQ feedback information according to the changed TTI length on the downlink.
  • the sending unit 102 is further configured to: send uplink authorization information to the terminal.
  • the sending unit 102 is further configured to: send the HARQ identification information of the HARQ feedback information or the HARQ identification information corresponding to the uplink authorization information.
  • the sending unit 102 controls at least one or a combination of an RRC message, a broadcast message, a medium access control layer MAC control element CE, and physical layer signaling by using a radio resource, in an explicit manner or in an implicit manner. Send the indication information.
  • the sending unit 102 implicitly sends the indication information by using the resource where the physical layer signaling is located; or The indication information is transmitted by the new data included in the downlink control information DCI reaching the flipped indication information. And if the indication information is used to indicate that the terminal is in communication with the terminal on the frequency domain resource where the changed TTI length is located, and is sent by using physical layer signaling, the sending unit 102 sends the indication information by using the downlink control information DCI.
  • the DCI further carries at least one or a combination of a HARQ identifier and a modulation and coding scheme MCS corresponding to the data information.
  • the processing unit 101 of the network device 100 may be a processor or a controller.
  • the sending unit 102 of the network device 100 may be a communication interface, a transceiver, a transceiver circuit, etc., wherein the communication interface is a collective name and may include one or more interfaces.
  • the network device provided by the embodiment of the present invention may have the structure as shown in FIG.
  • FIG. 12 is a schematic diagram showing another possible structure of the network device 100 according to the embodiment of the present invention.
  • the network device 100 includes a processor 1001 and a transceiver 1002, and the processor 1001 is configured to support a network device.
  • the transceiver 1002 is configured to support communication between a network device and a terminal or other network entity.
  • the network device may further include a memory 1003 for coupling with the processor 1001, which stores necessary program instructions and data of the network device 100.
  • the network device may be a base station device.
  • FIG. 13 is a schematic structural diagram of a possible terminal 200 according to an embodiment of the present invention.
  • the terminal 200 has a function of realizing the behavior of the terminal 200 in the first communication method and the second communication method described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal 200 includes a receiving unit 201 and a processing unit 202.
  • the receiving unit 201 is configured to receive indication information that is sent by the network device when the length of the transmission time interval TTI on the communication link is changed, where the indication information is used to indicate that at least one hybrid automatic repeat request HARQ process is to be performed.
  • the transport block TB is cleared or used to indicate communication with the network device on the frequency domain resource where the changed TTI length is located.
  • the processing unit 202 is configured to clear the transport block TB of the at least one HARQ process of the terminal 200 according to the indication information, or communicate with the network device on the frequency domain resource where the changed TTI length is located.
  • the processing unit 202 is further configured to: determine the TTI length change. The previous TB cannot be transmitted on the communication link after the TTI length is changed.
  • the clearing of the TB of the at least one HARQ indicated by the indication information includes: clearing the TB of at least one HARQ process of one terminal 200; or clearing the TB of at least one HARQ process of the group of terminals 200; or The TB of the cell-specific at least one HARQ process is cleared.
  • the at least one HARQ process indicated by the indication information is a full HARQ process. Or the specified HARQ process.
  • the specified HARQ process is a process that specifies a HARQ identity, or a HARQ process that meets a quality of service QoS requirement.
  • the processing unit 202 specifically communicates with the network device on the frequency domain resource where the changed TTI length is located according to the indication information: discarding the frequency domain resource before the TTI length change, and after the change
  • the frequency domain resource on which the TTI length is located communicates with the network device, wherein the data communicated with the network device is data on the TB of the HARQ process before the TTI length change.
  • the receiving unit 201 is further configured to: after the processing unit 202 sends data on the frequency domain resource where the changed TTI length is located according to the indication information, the receiving network device is configured according to the downlink. HARQ feedback information sent by the changed TTI length.
  • the receiving unit 201 is further configured to receive uplink authorization information sent by the network device, if the HARQ feedback information is an error response command NACK.
  • the receiving unit 201 specifically receives the HARQ feedback information that is sent by the network device according to the changed TTI length on the downlink, and receives the HARQ identification information or the uplink of the HARQ feedback information sent by the network device.
  • the HARQ identification information corresponding to the authorization information.
  • the processing unit 202 is further configured to: according to the HARQ identification information of the HARQ feedback information and the TTI length change The state of the HARQ process is subjected to HARQ processing.
  • the processing unit 202 is further configured to: according to the HARQ identification information corresponding to the uplink authorization information, and the location before the TTI length is changed. The state of the HARQ process is described, and HARQ processing is performed.
  • the processing unit 202 performs HARQ processing in the following manner: if the HARQ process is at least two HARQ processes, the at least two HARQ processes are combined.
  • the receiving unit 201 controls an RRC message, a broadcast message, and a media by using a radio resource. At least one or a combination of an access control layer MAC Control Element CE and physical layer signaling receives the indication information in an explicit manner or in an implicit manner. If the indication information is used to indicate that the TB of the at least one HARQ process is cleared and received by the physical layer signaling, the receiving unit 201 implicitly receives the indication information by using the physical layer signaling resource; or The new data included in the downlink control information DCI arrives at the inverted indication information to receive the indication information. If the indication information is used to indicate that the network device is in communication with the network device and the physical layer signaling is received, the receiving unit 201 receives the indication information by using the downlink control information DCI. .
  • the DCI further carries at least one or a combination of a HARQ identifier and a modulation and coding scheme MCS corresponding to the data information.
  • the processing unit 202 of the terminal 200 may be a processor, and the receiving unit 201 may be a receiver.
  • the terminal 200 involved in the embodiment of the present invention may be the terminal 200 shown in FIG.
  • Figure 14 illustrates a possible terminal 200 in accordance with an embodiment of the present invention.
  • the terminal 200 includes a processor 2001 and a receiver 2002.
  • the terminal 200 can also include a memory 2003 for coupling with the processor 2001, which stores the necessary program instructions and data for the terminal 200.
  • the terminal 200 may further include an antenna 2004.
  • FIG. 15 is a schematic structural diagram of a possible network device 300 according to an embodiment of the present invention.
  • the network device 300 has a function of realizing the behavior of the network device in the third communication method described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device 300 has a processing unit 301 and a sending unit 302, wherein the processing unit 301 is configured to determine that a transmission time interval TTI length on the communication link is changed, and generate a terminal for indicating The indication information of the communication on the communication link according to the changed TTI length according to the effective time of the TTI length change.
  • the sending unit 302 is configured to send the indication information to the terminal.
  • the effective time is used to indicate that the terminal uses the start time of the TTI after the length change on the communication link; or the effective time is a start time when the terminal receives the effective time information.
  • the value represented by the shift value; or the effective time is represented by a timing time at which the terminal receives the effective time information as a start time.
  • the processing unit 301 is further configured to pre-configure the effective time on the terminal to be pre-configured to the terminal.
  • the sending unit 302 is further configured to send the effective time to the terminal.
  • the sending unit 302 is further configured to send activation indication information, where the activation indication information is used to activate the effective time.
  • the processing unit 301 is further configured to select an effective time in the at least two effective times, if the effective time is at least two effective times.
  • the sending unit 302 is further configured to send and/or indicate the selected effective time to the terminal. Or the processing unit 301 instructs the terminal to select an effective time in the at least two effective times.
  • the processing unit 301 is further configured to instruct the terminal to send and/or receive data according to the changed TTI length on the communication link according to the selected effective time.
  • the sending unit 302 may control at least one or a combination of an RRC message, a broadcast message, a medium access layer MAC control element CE, and physical layer signaling by using a radio resource, in an explicit manner or in an implicit manner.
  • the effective time is an effective time for one terminal, or is for a cell.
  • the processing unit 301 of the network device 300 may be a processor or a controller.
  • the transmitting unit 302 of the network device 300 may be a communication interface, a transceiver, a transceiver circuit, etc., wherein the communication interface is a collective name and may include one or more interfaces.
  • the network device 300 When the processing unit 301 included in the network device 300 is a processor and the sending unit 302 is a transceiver, the network device 300 provided by the embodiment of the present invention may have the structure as shown in FIG. 16.
  • FIG. 16 is a schematic diagram showing another possible structure of the network device 300 according to the embodiment of the present invention.
  • the network device 300 includes a processor 3001 and a transceiver 3002.
  • the processor 3001 is configured to support the network device 300 to perform corresponding functions in the methods described above, the transceiver 3002 being configured to support communication between the network device 300 and a terminal or other network entity.
  • the network device 300 may further include a memory 3003 for coupling with the processor 3001, which stores necessary program instructions and data of the network device 300.
  • the network device 300 can be a base station device.
  • FIG. 17 shows a schematic structural diagram of a possible terminal 400 according to an embodiment of the present invention.
  • the terminal 400 has a function of realizing the behavior of the terminal in the above-described third communication method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal 400 includes a processing unit 401 and a communication unit 402, where the processing unit 401 is configured to determine an effective time of a TTI length change, and send the transmission according to the effective time of the TTI length change.
  • the unit communicates on the communication link in accordance with the changed length of the TTI.
  • the effective time is used to indicate that the terminal 400 uses the start time of the TTI after the length change on the communication link; or the effective time is started by the terminal 400 receiving the effective time information.
  • the offset value is represented by; or the effective time is represented by a timing time at which the terminal 400 receives the effective time information as a start time.
  • the effective time is pre-configured on the terminal 400 or sent by the network device to the terminal 400. If the effective time is sent by the network device to the terminal 400, the The letter unit 402 is further configured to receive the effective time.
  • the communication unit 402 is further configured to receive activation indication information sent by the network device, where the activation indication information is used to activate the effective time.
  • the communication unit 402 is configured to communicate on the communication link according to the changed TTI length on the selected one of the at least two effective times.
  • the one effective time selected in the at least two effective times is one effective time selected by the terminal 400 in the at least two effective times, or the network device is in the at least two effective time An effective time is selected and an effective time of the selection is sent and/or indicated to the terminal 400 for an effective time.
  • the effective time and/or the activation information is that the communication unit 402 controls at least one of a RRC message, a broadcast message, a medium access layer MAC control element CE, and physical layer signaling by using a radio resource or Combination, received in an explicit or implicit manner. If the effective time and/or the activation information is received through physical layer signaling, the activation indication information is received in the downlink control information DCI; or the activation indication information is a time-frequency resource hidden by using DCI. Received; or the activation indication information is implicitly received using the scrambling code of the DCI.
  • the sequence number, m is a fixed value assigned to the network side, and mod() represents the remainder operation.
  • the effective time is an effective time for one terminal 400, or an effective time for a cell, or an effective time for a group of terminals 400.
  • the processing unit 401 of the terminal 400 may be a processor, and the communication unit 402 may be a receiver/transmitter.
  • the terminal 400 involved in the embodiment of the present invention may be the terminal 400 shown in FIG. 18.
  • FIG. 18 shows a possible terminal 400 in accordance with an embodiment of the present invention.
  • the terminal 400 includes a processor 4001 and a receiver/transmitter 4002.
  • the terminal 400 may further include a memory 4003 for coupling with the processor 4001, which stores necessary program instructions and data of the terminal 400.
  • the terminal 400 may further include an antenna 4004.
  • FIG. 19 is a schematic structural diagram of a possible network device 500 according to an embodiment of the present invention.
  • the network device 500 has a function of realizing the behavior of the network device in the fourth communication method and the fifth communication method described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device 500 includes a processing unit 501 and a sending unit 502, where the processing unit 501 is configured to determine that a length of a transmission time interval TTI on the communication link is changed, and instruct the terminal to change information according to the TTI length. And updating the time-frequency resource for transmitting the hybrid automatic repeat request HARQ feedback information on the communication link, and sending the HARQ feedback information on the updated time-frequency resource.
  • the sending unit 502 is configured to send TTI length change information or send a new transport block TB or retransmit a TB.
  • the processing unit 501 is further configured to determine, before the sending unit 502 sends the TTI length change information, a time when the HARQ feedback information is originally sent, after the TTI length change time.
  • the updated time-frequency resource is: a TTI of the time-frequency resource that sends the HARQ feedback information on the communication link after the TTI length is changed, the time-frequency resource location, and the TTI length change.
  • the updated time-frequency resource is: the time-frequency resource at the indicated position corresponding to the downlink TTI length and the uplink TTI length after the TTI length is changed; wherein the TTI length is changed.
  • the TTI length is changed.
  • the processing unit 501 is further configured to: after the terminal updates the time-frequency resource that sends the HARQ feedback information on the communication link, discards the HARQ feedback information before the TTI length change takes effect.
  • the updated time-frequency resource is: a time-frequency resource with a set offset of the time-frequency resource location and the TTI length and the uplink TTI length corresponding to the indicated position of the TTI length change; the offset and the location There is a corresponding relationship between the downlink TTI length and the uplink TTI length after the TTI length is changed.
  • the offset is sent by the network device 500 to the terminal; or the offset is preset on the terminal and the network device 500; or the offset is determined by the terminal and sent To the network device 500; or the offset is negotiated by the terminal and the network device 500.
  • the updated time-frequency resource is: a downlink TTI length before the TTI length change, an uplink TTI length, a downlink TTI length after the TTI length change, and a time frequency at the indicated position corresponding to the uplink TTI length.
  • the resource has a preset correspondence relationship between the downlink TTI length and the uplink TTI length, the downlink TTI length and the uplink TTI length after the TTI length change, and the indicated location.
  • the updated time-frequency resource is: one time-frequency resource of the at least two time-frequency resources mapped on the communication link after the TTI length change is sent by the time-frequency resource that sends the HARQ feedback information before the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device 500 in the at least two time-frequency resources; or a time-frequency resource start position in the at least two time-frequency resources is sent before the TTI length is changed.
  • the time-frequency resource after the start position of the time-frequency resource of the HARQ feedback information is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device 500 in the at least two time-frequency resources; or a time-frequency resource start position in the at least two time-frequency resources is sent before the TTI length is changed.
  • the sending unit 502 sends the HARQ feedback information on the updated time-frequency resource by sending at least two HARQ feedback messages on the updated time-frequency resource.
  • the sending unit 502 is configured to send the at least two HARQ feedback messages in a binding manner or a multiplexing manner, or carry the implicit information in the at least two HARQ feedback messages.
  • the HARQ identification information or the explicit HARQ identification information; or the at least two HARQ feedback messages are the HARQ feedback messages that need to be sent in advance by the network device 500; or the at least two HARQ feedback messages are used as the used transport blocks.
  • the HARQ feedback message whose TB size matches the current TTI length.
  • the at least two HARQ feedback messages sent by the sending unit 502 may be the HARQ feedback message selected by the terminal; or the at least two HARQ feedback messages sent by the sending unit 502 are before the TTI length change. And the HARQ feedback message after the length of the TTI is changed; or the at least two HARQ feedback messages sent by the sending unit 502 are HARQ feedback messages that are selected according to a preset priority order.
  • the updated time-frequency resource location is sent by the network device 500 to the terminal; or the updated time-frequency resource location is preset on the terminal and the network device 500. Or the updated time-frequency resource location is determined by the terminal and sent to the network device 500; or the updated time-frequency resource location is jointly negotiated by the terminal and the network device 500.
  • the processing unit 501 is further configured to determine that the error response command NACK information sent by the terminal is not received.
  • the sending unit 502 is further configured to send a clear indication, where the clear indication is used to indicate that the TB of the HARQ process of the terminal is cleared, or the HARQ process of the terminal is cleared.
  • the processing unit 501 is further configured to select a HARQ identifier, and a downlink TTI length and an uplink TTI length information after the TTI length is changed, where the sending unit 502 is further configured to select and send the HARQ identifier, and the TTI length change.
  • the following downlink TTI length and uplink TTI length information is further configured to select a HARQ identifier, and a downlink TTI length and an uplink TTI length information after the TTI length is changed.
  • the HARQ feedback information sent on the updated time-frequency resource is the HARQ feedback information corresponding to the HARQ identifier indicated by the network device 500.
  • the HARQ identification information that is sent on the updated time-frequency resource is explicitly or implicitly included in the HARQ identification information.
  • the TTI length is changed, including: the TTI length is changed within 1 ms; or the TTI length is changed between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI of less than 1 ms.
  • the sending unit 502 controls at least one or a combination of an RRC message, a broadcast message, a medium access control layer MAC control element CE, and physical layer signaling by using a radio resource, in an explicit manner or in an implicit manner. Sending the TTI length change information.
  • the TTI length change information is TTI length change information of at least one HARQ process of one terminal, TTI length change information of at least one HARQ process of a group of terminals, or TTI length change information of at least one HARQ process of a cell.
  • the TTI length change message may be included in the updated time-frequency resource.
  • the processing unit 501 of the network device 500 may be a processor or a controller.
  • the transmitting unit 502 of the network device 500 may be a communication interface, a transceiver, a transceiver circuit, etc., wherein the communication interface is a collective name and may include one or more interfaces.
  • the network device 500 When the processing unit 501 of the network device 500 is a processor and the sending unit 502 is a transceiver, the network device 500 provided by the embodiment of the present invention may have the structure as shown in FIG.
  • FIG. 20 is a schematic diagram showing another possible structure of the network device 500 according to the embodiment of the present invention.
  • the network device 500 includes a processor 5001 and a transceiver 5002.
  • the processor 5001 is configured to support the network device 500 to perform corresponding functions in the methods described above, the transceiver 5002 being configured to support communication between the network device 500 and a terminal or other network entity.
  • the network device 500 may further include a memory 5003 for coupling with the processor 5001, which stores necessary program instructions and data of the network device 500.
  • the network device 500 can be a base station device.
  • FIG. 21 is a schematic structural diagram of a possible terminal 600 according to an embodiment of the present invention.
  • the terminal 600 has a function of realizing terminal behavior in the fourth communication method and the fifth communication method described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal 600 includes a receiving unit 601, a processing unit 602, and a transmitting unit 603.
  • the receiving unit 601 is configured to receive transmission time interval TTI length change information on a communication link sent by the network device.
  • the processing unit 602 is configured to receive the according to the receiving unit 601
  • the TTI length change information updates the time-frequency resource for transmitting the hybrid automatic repeat request HARQ feedback information on the communication link.
  • the sending unit 603 is configured to send the HARQ feedback information on the time-frequency resource that is updated by the processing unit 602. or
  • the receiving unit 601 is configured to acquire a new transmission block TB or a retransmission TB sent by the network device.
  • the processing unit 602 is configured to stop transmitting the HARQ feedback information, and perform joint decoding to obtain the TB after the TTI length change based on the newly transmitted TB or the retransmission TB received by the receiving unit 601 and the TB before the TTI length change. information.
  • the transmitting unit 603 is configured to send a new transmission TB or the retransmission TB based on the TB of the HARQ before the TTI length change.
  • the processing unit 602 is further configured to: before updating the time-frequency resource for transmitting the HARQ feedback information on the communication link, determine, according to the TTI length change information, a time for transmitting the HARQ feedback information, where the TTI length is changed. After time.
  • the updated time-frequency resource is: a TTI of the time-frequency resource that sends the HARQ feedback information on the communication link after the TTI length is changed, the time-frequency resource location, and the TTI length change.
  • the updated time-frequency resource is: a time-frequency resource at the indicated position corresponding to the downlink TTI length and the uplink TTI length after the TTI length is changed.
  • the downlink TTI length after the TTI length is changed has a preset correspondence relationship between the uplink TTI length and the indication position.
  • the processing unit 602 is further configured to: after updating the time-frequency resource that sends the HARQ feedback information on the communication link, discard the HARQ feedback information before the TTI length change takes effect.
  • the updated time-frequency resource is: a time-frequency resource with a set offset of the time-frequency resource location and the TTI length and the uplink TTI length corresponding to the indicated position of the TTI length change; the offset and the location There is a corresponding relationship between the downlink TTI length and the uplink TTI length after the TTI length is changed.
  • the offset is sent by the network device to the terminal 600; or the offset is preset on the terminal 600 and the network device; or the offset is determined by the terminal 600 and Sent to the network device; or the offset is negotiated by the terminal 600 and the network device.
  • the updated time-frequency resource is: a downlink TTI length before the TTI length change, an uplink TTI length, a downlink TTI length after the TTI length change, and a time frequency at the indicated position corresponding to the uplink TTI length.
  • the resource has a preset correspondence relationship between the downlink TTI length and the uplink TTI length, the downlink TTI length and the uplink TTI length after the TTI length change, and the indicated location.
  • the updated time-frequency resource is: one time-frequency resource of the at least two time-frequency resources mapped on the communication link after the TTI length change is sent by the time-frequency resource that sends the HARQ feedback information before the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed.
  • the time-frequency resource after the start position of the time-frequency resource of the HARQ feedback information is: any one of the at least two time-frequency resources; or the time-domain position of the at least two time-frequency resources is the highest a frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a start time-frequency resource start position of the at least two time-frequency resources before the TTI length is changed.
  • the sending unit 603 specifically sends the HARQ feedback information on the updated time-frequency resource by sending at least two HARQ feedback messages on the updated time-frequency resource.
  • the at least two HARQ feedback messages are sent in a binding manner or in a multiplexing manner; or the at least two HARQ feedback messages carry implicit HARQ identification information or explicit HARQ identification information; or the at least two And the at least two HARQ feedback messages are:
  • the feedback message is a HARQ feedback message selected by the terminal 600; the at least two HARQ feedback messages are HARQ feedback messages before the TTI length change and/or after the TTI length is changed; the at least two HARQ feedback messages are preset according to the preset Priority order selected HARQ feedback message.
  • the updated time-frequency resource location is sent by the network device to the terminal 600; or the updated time-frequency resource location is preset on the terminal 600 and the network device. Or the updated time-frequency resource location is determined by the terminal 600 and sent to the network And the updated time-frequency resource location is jointly negotiated by the terminal 600 and the network device.
  • the HARQ feedback information sent on the updated time-frequency resource is correct HARQ feedback information.
  • the receiving unit 601 is further configured to receive a clear indication sent by the network device, where the clear indication is used to indicate that the TB of the HARQ process of the terminal 600 is cleared, or the HARQ process of the terminal 600 is cleared. .
  • the sending unit 603 is further configured to stop sending the error response command NACK information.
  • the receiving unit 601 is further configured to receive a HARQ identifier selected and sent by the network device, and a downlink TTI after the TTI length is changed. Length and uplink TTI length information.
  • the HARQ feedback information sent on the updated time-frequency resource is the HARQ feedback information corresponding to the HARQ identifier indicated by the network device.
  • the HARQ identification information may be explicitly or implicitly included in the HARQ feedback information sent on the updated time-frequency resource.
  • the TTI length is changed, including: the TTI length is changed within 1 ms; or the TTI length is changed between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI of less than 1 ms.
  • the receiving unit 601 sends the RRC message, the broadcast message, the medium access control layer MAC control element CE, and the physical layer signaling by using at least one or a combination of the RRC message, or explicitly, in an implicit manner.
  • the method receives the TTI length change information.
  • the TTI length change information may be TTI length change information of at least one HARQ process of one terminal 600, TTI length change information of at least one HARQ process of a group of terminals 600, or TTI length change information of at least one HARQ process of a cell. .
  • the TTI length change message may be included in the updated time-frequency resource.
  • the processing unit 602 of the terminal 600 may be a processor
  • the receiving unit 601 may be a receiver
  • the sending unit 603 may be a transmitter.
  • the terminal 600 When the processing unit 602 of the terminal 600 is a processor, the receiving unit 601 is a receiver, and the sending unit 603 is a transmitter, the terminal 600 according to the embodiment of the present invention may be the terminal 600 shown in FIG.
  • Figure 22 illustrates a possible terminal 600 in accordance with an embodiment of the present invention.
  • the terminal 600 includes a processor 6001 and a receiver 6002, and a transmitter 6003.
  • the terminal 600 can also include a memory 6004 for coupling with the processor 6001 that retains the necessary program instructions and data for the terminal 600.
  • the terminal 600 may further include an antenna 6005.
  • FIG. 23 is a schematic structural diagram of a possible network device 700 according to an embodiment of the present invention.
  • the network device 700 has a function of implementing the behavior of the network device in the sixth communication method described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device 700 processing unit 701 and the sending unit 702 are configured to determine a transmission time interval TTI length change on the communication link, and determine to indicate the terminal communication link.
  • the TTI length is changed, and the TTI length change command for the terminal to communicate according to the TTI length change command is instructed.
  • the sending unit 702 is configured to send a TTI length change instruction.
  • the sending unit 702 is further configured to send indication information for indicating whether the uplink authorization is valid or not.
  • the sending unit 702 is further configured to send physical layer information, where the physical layer information is used to indicate that the data is sent according to the uplink grant, or is changed according to the length. TTI sends data.
  • the sending unit 702 is further configured to resend the uplink grant.
  • the processing unit 701 specifically indicates that the terminal performs communication according to the TTI length change command in the following manner: if the terminal receives the uplink grant time, the TTI is received. After the length change command time, or the terminal receives the uplink grant and the TTI length change command at the same time, instructing the terminal to perform communication on the communication link whose TTI length is changed according to the uplink grant. . And if the terminal receives the uplink grant time before receiving the TTI length change instruction time, instructing the terminal to discard the time-frequency resource corresponding to the uplink grant.
  • the processing unit 701 specifically instructs the terminal to perform communication according to the TTI length change instruction, where the terminal is instructed to determine the updated time-frequency resource according to the TTI length change command, and the updated time-frequency Communicate on resources.
  • the updated time-frequency resource is one of the at least two time-frequency resources mapped by the time-frequency resource that sends the HARQ response information before the TTI length change on the communication link after the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain location of the at least two time-frequency resources is the highest Time-frequency resource; or one time-frequency resource specified by the network device 700 in the at least two time-frequency resources; or the time-frequency resource start position in the at least two time-frequency resources is changed in the TTI length.
  • the time-frequency resource after the start of the time-frequency resource of the HARQ response information is transmitted.
  • the processing unit 701 is configured to: instruct the terminal to send data according to the TTI length change command: instructing the terminal to determine the updated time-frequency resource according to the TTI length change command, and the updated time-frequency Send at least two data on the resource.
  • the at least two pieces of data are sent by using a binding mode or a multiplexing mode; or the at least two pieces of data carry implicit data identification information or explicit data identification information; or the at least two pieces of data are The network device 700 pre-agreed data to be transmitted; or the at least two data is data whose size of the used transport block TB matches the current TTI length; the at least two data are data selected by the terminal; The two data are data before the TTI length change and/or after the TTI length change; the at least two data are data selected in a preset priority order.
  • the TTI length change includes: changing a TTI length within 1 ms; or changing a TTI length between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI less than 1 ms.
  • the sending unit 702 sends data before the TTI length change command takes effect
  • the receiving unit is The sending unit 702 is further configured to: after receiving the feedback information that the network device 700 performs automatic retransmission request HARQ feedback on the data after the TTI length change command takes effect, the sending unit 702 is further configured to:
  • the HARQ identifier or the data identifier sent by the sending unit 702 is sent by using downlink control information DCI. Or the HARQ identifier or the data identifier sent by the sending unit 702 is associated with the location information of the physical hybrid automatic request retransmission indication channel PHICH.
  • the processing unit 701 is further configured to: instruct the terminal to acquire a time-frequency resource that transmits the HARQ feedback information by using a time-frequency resource of a transport block that transmits the HARQ identifier and/or the HARQ feedback information.
  • the time-frequency resource includes time information of a short TTI less than 1 ms.
  • the processing unit 701 is further configured to: after the terminal obtains the HARQ feedback information, perform the synchronous HARQ based on the changed TTI.
  • the processing unit 701 of the network device 700 may be a processor or a controller.
  • the transmitting unit 702 of the network device 700 may be a communication interface, a transceiver, a transceiver circuit, etc., wherein the communication interface is a collective name and may include one or more interfaces.
  • the network device 700 When the processing unit 701 of the network device 700 is a processor and the sending unit 702 is a transceiver, the network device 700 provided by the embodiment of the present invention may have the structure as shown in FIG.
  • FIG. 24 is a schematic diagram showing another possible structure of the network device 700 according to the embodiment of the present invention.
  • the network device 700 includes a processor 7001 and a transceiver 7002.
  • the processor 7001 is configured to support the network device 700 to perform a corresponding function in the above method
  • the transceiver 7002 is configured It is configured to support communication between the network device 700 and the terminal or other network entity.
  • the network device 700 may further include a memory 7003 for coupling with the processor 7001, which stores necessary program instructions and data of the network device 700.
  • the network device 700 can be a base station device.
  • FIG. 25 shows a schematic structural diagram of a possible terminal 800 according to an embodiment of the present invention.
  • the terminal 800 has a function of realizing the behavior of the terminal in the sixth communication method described above.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal 800 includes a receiving unit 801 and a transmitting unit 802.
  • the receiving unit 801 is configured to receive a transmission time interval TTI length change command sent by the network device, where the TTI length change command is used to instruct the terminal 800 to change the TTI length on the communication link for transmitting and/or receiving data.
  • the sending unit 802 is configured to send data according to the TTI length change instruction.
  • the sending unit 802 sends data according to the TTI length change command in the following manner: if the receiving unit 801 receives the uplink grant time after receiving the TTI length change instruction time, or The receiving unit 801 simultaneously receives the uplink grant and the TTI length change command, and the sending unit 802 sends data according to the uplink grant on the communication link whose TTI length is changed. If the receiving unit 801 receives the uplink grant time before receiving the TTI length change command time, the sending unit 802 discards the time-frequency resource corresponding to the uplink grant.
  • the receiving unit 801 is further configured to: before the sending unit 802 sends data according to the TTI length change command, receive indication information that is sent by the network device to indicate whether the uplink authorization is valid or not.
  • the sending unit 802 is further configured to send, on the UL grant resource, TB data that carries the hybrid automatic repeat request HARQ identifier.
  • the receiving unit 801 is further configured to: before the sending unit 802 sends data according to the TTI length change command, receive physical layer information sent by the network device, where the physical layer information is used to indicate that the uplink authorization is performed. Send data, or send data according to TTI after length change.
  • the receiving unit 801 is further configured to receive an uplink grant that is resent by the network device before the sending unit 802 sends data according to the TTI length change command.
  • the sending unit 802 specifically sends data according to the TTI length change instruction in the following manner:
  • the updated time-frequency resource is determined according to the TTI length change command, and the data is sent on the updated time-frequency resource.
  • the updated time-frequency resource is one of the at least two time-frequency resources mapped by the time-frequency resource that sends the HARQ response information before the TTI length change on the communication link after the TTI length is changed.
  • the time-frequency resource of the at least two time-frequency resources is: any one of the at least two time-frequency resources; or the time-domain location of the at least two time-frequency resources is the highest a time-frequency resource; or a time-frequency resource specified by the network device in the at least two time-frequency resources; or a time-frequency resource start position in the at least two time-frequency resources before the TTI length is changed And transmitting a time-frequency resource after the start position of the time-frequency resource of the HARQ response information.
  • the sending unit 802 specifically sends data according to the TTI length change instruction in the following manner:
  • the updated time-frequency resource is determined according to the TTI length change command, and at least two data are sent on the updated time-frequency resource.
  • the at least two pieces of data are sent by using a binding mode or a multiplexing mode; or the at least two pieces of data carry implicit data identification information or explicit data identification information; or the at least two pieces of data are
  • the network device pre-agreed data to be transmitted; or the at least two data is data whose size of the used transport block TB matches the current TTI length; the at least two data are data selected by the terminal 800;
  • the two data are data before the TTI length change and/or after the TTI length is changed; or the at least two data are data selected in a preset priority order.
  • the TTI length change includes: changing a TTI length within 1 ms; or changing a TTI length between a short TTI and a 1 ms TTI less than 1 ms; and the TTI length is changed within a short TTI less than 1 ms.
  • the transmitting unit 802 transmits data before the TTI length change command takes effect
  • the receiving unit 801 receives the automatic retransmission request HARQ for the data by the network device after the TTI length change command takes effect.
  • the feedback information is fed back, and the receiving unit 801 is further configured to:
  • a HARQ identifier for performing HARQ feedback on the data or a data identifier for performing HARQ feedback on the data or receiving indication information sent by the network device, where the indication information is used to indicate whether the data is performed
  • the HARQ feedback HARQ identifier or the data identifier for indicating whether to perform HARQ feedback on the data or the first HARQ feedback information of the HARQ feedback information sent by the network device and performing HARQ feedback on the data Or high priority HARQ feedback information.
  • the receiving unit 801 receives the HARQ identifier or the data identifier by using downlink control information DCI.
  • the HARQ identifier or the data identifier is associated with the location information of the physical hybrid automatic request retransmission indication channel PHICH.
  • the receiving unit 801 is further configured to obtain a time-frequency resource that transmits the HARQ feedback information by using a time-frequency resource of a transport block that transmits the HARQ identifier and/or the HARQ feedback information.
  • the time-frequency resource includes time information of a short TTI less than 1 ms.
  • the sending unit 802 performs synchronous HARQ based on the changed TTI.
  • the receiving unit 801 of the terminal 800 may be a receiver, and the sending unit 802 may be a transmitter.
  • the terminal 800 involved in the embodiment of the present invention may be the terminal 800 shown in FIG.
  • Figure 26 illustrates a possible terminal 800 in accordance with an embodiment of the present invention.
  • the terminal 800 includes a transmitter 8001 and a receiver 8002.
  • the terminal 800 can also include a processor 8003 and a memory 8004 for coupling with the processor 8003, which stores program instructions and data necessary for the terminal 800.
  • the terminal 800 may further include an antenna 8005.
  • the network device and the terminal are not limited to the foregoing structure.
  • the terminal may further include a display device, an input/output interface, and the like, and all the terminals that can implement the embodiments of the present invention are within the protection scope of the embodiments of the present invention.
  • the network device may also include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all network devices that can implement the embodiments of the present invention are within the protection scope of the embodiments of the present invention.
  • terminal and the terminal network device according to the embodiment of the present invention may be used to implement the corresponding functions of the terminal and the network device in the foregoing method embodiment of the embodiment of the present invention, so that the description of the embodiment of the present invention is not detailed enough.
  • the embodiments of the present invention are not described herein again.
  • processors or controller involved in the foregoing embodiments of the present invention may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application specific integrated circuit (Application).
  • CPU central processing unit
  • DSP digital signal processor
  • Application application specific integrated circuit
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication method, the network device, and the terminal of the foregoing aspects of the embodiments of the present invention can ensure correct transmission and correct reception of data packets in the DL HARQ process and the UL HARQ process under the condition that the TTI length is changed.
  • the TTI may further include a TTI in a 5G communication system.
  • the change in the transmission time interval TTI length includes a change in the TTI length of the 5G system, or a change in the TTI length between the 4G system and the 5G system.
  • the change in the length of the TTI may also refer to a change in the length of the downlink and uplink used in the TTI frame.
  • the processor may be instructed to execute by a program, and the program may be stored in a computer readable storage medium, which is a non-transitory medium, such as a random access memory, a read only memory, Flash memory, hard disk, solid state hard disk, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.
  • a computer readable storage medium such as a random access memory, a read only memory, Flash memory, hard disk, solid state hard disk, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.
  • FIG. 1 These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.

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Abstract

一种通信方法、网络设备及终端，络设备确定通信链路上的传输时间间隔TTI长度发生变更，所述网络设备向终端发送指示信息，终端接收网络设备在确定通信链路上的传输时间间隔TTI长度发生变更情况下所发送的指示信息，并依据所述指示信息，将所述终端的至少一个HARQ进程的传输块TB清零，或者在变更后的TTI长度所在的频域资源上与网络设备进行通信，以在TTI长度变更情况下，保证DL HARQ进程和UL HARQ进程中数据包的正确发送和正确接收。

Description

一种通信方法、网络设备及终端 技术领域
本发明涉及通信技术领域，尤其涉及一种通信方法、网络设备及终端。
背景技术
长期演进(Long Term Evolution，LTE)是一种主流的新一代宽带无线通信技术。LTE网络以无线帧(raido frame)为单位传输信号，每个无线帧由子帧(subframe)构成，每个子帧有2个时隙(slot)，每个slot由固定个数的正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号组成。
随着通信技术的发展，根据不同的通信需求，LTE网络中的子帧结构会发生变化，子帧的传输时间间隔(Transmission Time Interval，TTI)也会发生变化。例如，为了支持上行覆盖增强，上行链路(Uplink，UL)的TTI长度可能长于下行链路(Downlink，DL)的TTI长度。再例如，随着终端业务类型的增多，终端使用较少的时域资源就可以传输数据，子帧的传输时间间隔变短并引入短传输时间间隔(Short Transmission Time Interval，sTTI)。
对于终端而言，业务类型是动态变化的，因此TTI的长度也可以是动态变化的，故在某个时刻，演进的节点B(evolved NodeB，简称：eNB或者eNodeB)可能会向终端发送TTI长度配置变更指令，该TTI长度配置指令可以是针对UL的，也可以是针对DL的。例如，所述TTI长度配置变更指令用于指示DL的TTI在(2os(ofdm symbol)，7os)中变化，或者用于指示UL的TTI在(2os，4os，7os)中变化，或者用于指示在sTTI与TTI之间变更。无论所述TTI长度变更指令用于指示何种TTI长度变更，都会导致DL或UL的数据原本传输位置发生变化，产生数据的错发和错收，浪费无线资源，并导致传输速率和***容量的下降。
发明内容
本发明实施例提供一种通信方法、网络设备及终端，以在TTI长度变更 情况下，提高传输速率和***容量。
第一方面，提供一种通信方法，网络设备确定通信链路上的传输时间间隔TTI长度发生变更；所述网络设备向终端发送指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与终端进行通信。终端接收所述网络设备发送的指示信息，并依据所述指示信息将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与终端进行通信。
本发明实施例中为使HARQ进程中传输的数据能够正确发送和接收，可在网络设备确定TTI长度变更的情况下，向终端发送将HARQ进程的TB清零的指示信息，以使终端将HARQ进程中的TB清零，并在变更后的TTI长度的TB中重新传输数据，保证数据的正确发送和接收。
可选的，若所述指示信息用于指示将至少一个HARQ进程的TB清零，则所述网络设备向终端发送指示信息之前，确定所述TTI长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
其中，所述将至少一个HARQ的TB清零，包括：将一个终端的至少一个HARQ进程的TB清零；或者将一组终端的至少一个HARQ进程的TB清零；或者将小区的至少一个HARQ进程的TB清零。
其中，所述至少一个HARQ进程为全部HARQ进程，或者指定的HARQ进程。
其中，所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
可选的，所述在变更后的TTI长度所在的频域资源上与终端进行通信，包括：丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与终端进行通信，所述数据为TTI长度变更前的HARQ进程的TB上的数据。
可选的，若所述指示信息用于指示在变更后的TTI长度所在的频域资源 上与终端进行通信，则所述网络设备向终端发送指示信息之后，可获取所述终端发送的数据，并在下行链路上依据变更后的TTI长度发送HARQ反馈信息。所述终端接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息。
其中，若所述HARQ反馈信息为错误应答指令NACK，则所述网络设备向所述终端发送上行授权信息。所述终端接收网络设备发送的上行授权信息。所述网络设备向终端发送指示信息之后，还可发送所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。所述终端接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。所述终端依据所述HARQ反馈信息的HARQ标识信息和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。所述终端依据所述上行授权信息对应的HARQ标识信息，和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。其中，若所述HARQ进程为至少两个HARQ进程，则对所述至少两个HARQ进程合并处理。
可选的，所述指示信息通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式发送。若所述指示信息用于指示将至少一个HARQ进程的TB清零，且通过物理层信令发送，则所述指示信息通过物理层信令所在资源隐式发送；或者所述指示信息通过在下行控制信息DCI中包含的新数据到达被翻转指示信息发送。若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，且通过物理层信令发送，则所述指示信息通过下行控制信息DCI发送。其中，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
第二方面，提供一种网络设备，该网络设备具有实现上述第一方面中网络设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，所述网络设备包括处理单元和发送单元，所述处 理单元，用于确定通信链路上的传输时间间隔TTI长度发生变更，并确定指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与终端进行通信。所述发送单元，用于向终端发送所述处理单元确定的指示信息。
可选的，若所述指示信息用于指示将至少一个HARQ进程的TB清零，则所述处理单元还用于：在所述发送单元向终端发送指示信息之前，确定所述TTI长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
可选的，所述处理单元，具体用于按如下方式指示将至少一个HARQ的TB清零：将一个终端的至少一个HARQ进程的TB清零；或者将一组终端的至少一个HARQ进程的TB清零；或者将小区的至少一个HARQ进程的TB清零。
其中，所述至少一个HARQ进程为全部HARQ进程，或者指定的HARQ进程。所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
其中，所述处理单元，具体用于按如下方式指示在变更后的TTI长度所在的频域资源上与终端进行通信：指示丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与终端进行通信，所述数据为TTI长度变更前的HARQ进程的TB上的数据。
可选的，若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，所述处理单元，还用于：在所述发送单元向终端发送指示信息之后获取所述终端发送的数据。所述发送单元，还用于在下行链路上依据变更后的TTI长度发送HARQ反馈信息。
若所述HARQ反馈信息为错误应答指令NACK，所述发送单元，还用于：向所述终端发送上行授权信息。
可选的，所述发送单元向终端发送指示信息之后，还用于：发送所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。
可选的，所述发送单元通过无线资源控制RRC消息、广播消息、媒体接 入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述指示信息。
其中，若所述指示信息用于指示将至少一个HARQ进程的TB清零，且通过物理层信令发送，则所述发送单元通过物理层信令所在资源隐式发送所述指示信息；或者通过在下行控制信息DCI中包含的新数据到达被翻转指示信息发送所述指示信息。若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，且通过物理层信令发送，则所述发送单元通过下行控制信息DCI发送所述指示信息。其中，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
在一种可能的设计中，所述网络设备包括的处理单元可以是处理器，发送单元可以收发器。所述处理器被配置为支持网络设备执行上述方法中相应的功能，所述收发器被配置为支持用于支持网络设备与终端或其他网络实体之间的通信。进一步的，所述网络设备还可以包括存储器，所述存储器用于与处理器耦合，其保存网络设备必要的程序指令和数据。
其中，所述网络设备可以为基站设备。
第三方面，提供一种终端，该终端具有实现上述第一方面中终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，所述终端包括接收单元和处理单元。所述接收单元，用于接收网络设备在确定通信链路上的传输时间间隔TTI长度发生变更情况下所发送的指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与网络设备进行通信。所述处理单元，用于依据所述指示信息，将所述终端的至少一个HARQ进程的传输块TB清零，或者在变更后的TTI长度所在的频域资源上与网络设备进行通信。
可选的，若所述指示信息用于指示将至少一个HARQ进程的TB清零，则在所述接收单元接收指示信息之前，所述处理单元，还用于：确定所述TTI 长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
其中，所述指示信息指示的将至少一个HARQ的TB清零，包括：将一个终端的至少一个HARQ进程的TB清零；或者将一组终端的至少一个HARQ进程的TB清零；或者将小区具体的至少一个HARQ进程的TB清零。
其中，所述指示信息指示的所述至少一个HARQ进程为全部HARQ进程，或者指定的HARQ进程。所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
其中，所述处理单元，具体采用如下方式依据所述指示信息在变更后的TTI长度所在的频域资源上与网络设备进行通信：丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与网络设备进行通信，其中，与网络设备进行通信的数据为TTI长度变更前的HARQ进程的TB上的数据。
可选的，所述接收单元，还用于：在所述处理单元依据所述指示信息在变更后的TTI长度所在的频域资源上发送数据之后，接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息。
若所述HARQ反馈信息为错误应答指令NACK，则所述接收单元，还用于接收网络设备发送的上行授权信息。
其中，所述接收单元，具体采用如下方式接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息：接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。
所述接收单元接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息之后，所述处理单元还用于：依据所述HARQ反馈信息的HARQ标识信息和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
所述接收单元接收所述网络设备发送的上行授权信息对应的HARQ标识信息之后，所述处理单元还用于：依据所述上行授权信息对应的HARQ标识信息，和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
其中，所述处理单元，具体采用如下方式进行HARQ处理：若所述HARQ进程为至少两个HARQ进程，则对所述至少两个HARQ进程合并处理。
其中，所述接收单元通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式接收所述指示信息。若所述指示信息用于指示将至少一个HARQ进程的TB清零，且通过物理层信令接收，则所述接收单元通过物理层信令所在资源隐式接收所述指示信息；或者通过在下行控制信息DCI中包含的新数据到达被翻转指示信息接收所述指示信息。若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与网络设备进行通信，且通过物理层信令接收，则所述接收单元通过下行控制信息DCI接收所述指示信息。其中，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
另一种可能的设计中，第三方面涉及的终端的处理单元可以是处理器，接收单元可以是接收器。所述终端还可以包括存储器，所述存储器用于与处理器耦合，其保存终端必要的程序指令和数据。
进一步的，所述终端还可以包括天线。
第四方面，提供一种通信方法，该方法中网络设备确定通信链路上的传输时间间隔TTI长度发生变更；所述网络设备指示终端按照所述TTI长度变更的生效时间，在所述通信链路上依据变更后的TTI长度通信。终端确定TTI长度变更的生效时间；所述终端按照所述TTI长度变更的生效时间，在所述通信链路上依据变更后的TTI长度通信。
所述生效时间可为用于指示终端在所述通信链路上使用所述长度变更后的所述TTI的起始时间；或者所述生效时间还可以是以终端接收到生效时间信息为开始的偏移值所表示的；或者所述生效时间还可以是以终端接收到生效时间信息为开始的定时时间所表示的。
本发明实施例中，TTI长度发生变更时，网络设备指示终端按照TTI长度变更的生效时间，在TTI长度变更后的通信链路上进行通信，使得终端能够最大程度的完成和网络设备之间进行通信的数据包的发送和/或接收，以避免发送和/或接收数据包的时频资源位置在TTI长度变更前后发生更迭，进而 避免数据包的错发和错收。
可选的，所述生效时间可预先配置于终端上或由所述网络设备发送给所述终端。
可选的，所述网络设备可向终端发送激活指示信息，所述激活指示信息用于激活所述生效时间。所述终端接收网络设备发送的激活指示信息，激活所述生效时间。
其中，所述生效时间可为至少两个生效时间，则所述网络设备可在所述至少两个生效时间中选择一个生效时间，并将所述选择的生效时间发送和/或指示给所述终端。所述网络设备还可指示所述终端在所述至少两个生效时间中选择一个生效时间。所述网络设备指示所述终端按照选择的生效时间，在所述通信链路上依据变更后的TTI长度发送和/或接收数据。所述终端按照在所述至少两个生效时间中选择的一个生效时间，在所述通信链路上依据变更后的TTI长度发送和/或接收数据。
其中，所述网络设备可通过无线资源控制RRC消息、广播消息、媒体接入层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述生效时间和/或所述激活信息。所述终端通过无线资源控制RRC消息、广播消息、媒体接入层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述生效时间和/或所述激活信息接收所述生效时间和/或所述激活信息。
其中，若所述生效时间和/或所述激活信息通过物理层信令发送，则所述激活指示信息是在下行控制信息DCI中所发送的；或者所述激活指示信息是利用DCI的时频资源隐式发送的；或者所述激活指示信息是利用DCI的加扰扰码隐式发送的。
具体的，所述生效时间是利用DCI的时频资源隐式发送的情况下，所述生效时间在所述DCI的时频资源位置满足公式：
n＝nrumod N；或者满足公式：
n＝(nru+m)mod N；
其中，所述nru是用于终端下行控制信息所在的第一个无线单元的索引值，N用于表示可选的生存时间的数目，n为选择的生存时间的顺序号，m为网络侧分配的固定数值，mod()表示求余运算。
可选的，所述生效时间可为针对一个终端的生效时间，或者为针对小区的生效时间，或者为针对一组终端的生效时间。
第五方面，提供一种网络设备，该网络设备具有实现上述第四方面中网络设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
一种可能的设计中，所述网络设备处理单元和发送单元，其中，所述处理单元，用于确定通信链路上的传输时间间隔TTI长度发生变更，并生成用于指示终端按照所述TTI长度变更的生效时间，在所述通信链路上依据变更后的TTI长度通信的指示信息。所述发送单元，用于向终端发送所述指示信息。
其中，所述生效时间为用于指示终端在所述通信链路上使用所述长度变更后的所述TTI的起始时间；或者所述生效时间是以终端接收到生效时间信息为开始的偏移值所表示的；或者所述生效时间是以终端接收到生效时间信息为开始的定时时间所表示的。
其中，所述处理单元还用于在所述终端上预先配置所述生效时间预先配置于终端。所述发送单元还用于向所述终端发送所述生效时间。
可选的，所述发送单元，还用于发送激活指示信息，所述激活指示信息用于激活所述生效时间。
可选的，若所述生效时间为至少两个生效时间，则所述处理单元还用于还用于在所述至少两个生效时间中选择一个生效时间。所述发送单元还用于将所述选择的生效时间发送和/或指示给所述终端。或者所述处理单元指示所述终端在所述至少两个生效时间中选择一个生效时间。
所述处理单元，还用于指示所述终端按照选择的生效时间，在所述通信链路上依据变更后的TTI长度发送和/或接收数据。
可选的，所述发送单元可通过无线资源控制RRC消息、广播消息、媒体接入层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述生效时间和/或所述激活信息。若所述生效时间和/或所述激活信息通过物理层信令发送，则所述激活指示信息是在下行控制信息DCI中所发送的；或者所述激活指示信息是利用DCI的时频资源隐式发送的；或者所述激活指示信息是利用DCI的加扰扰码隐式发送的。
所述生效时间是利用DCI的时频资源隐式发送的情况下，所述生效时间在所述DCI的时频资源位置满足公式：n＝nrumod N；或者满足公式：n＝(nru+m)mod N；其中，所述nru是用于终端下行控制信息所在的第一个无线单元的索引值，N用于表示可选的生存时间的数目，n为选择的生存时间的顺序号，m为网络侧分配的固定数值，mod()表示求余运算。
可选的，所述生效时间为针对一个终端的生效时间，或者为针对小区的生效时间，或者为针对一组终端的生效时间。
另一种可能的设计中，第五方面涉及的所述网络设备包括的处理单元可以是处理器，发送单元可以收发器。所述处理器被配置为支持网络设备执行上述方法中相应的功能，所述收发器被配置为支持用于支持网络设备与终端或其他网络实体之间的通信。进一步的，所述网络设备还可以包括存储器，所述存储器用于与处理器耦合，其保存网络设备必要的程序指令和数据。
其中，所述网络设备可以为基站设备。
第六方面，提供一种终端，该终端具有实现上述第四方面中终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，所述终端包括处理单元和通信单元，其中，所述处理单元，用于确定TTI长度变更的生效时间，并按照所述TTI长度变更的 生效时间，通过所述发送单元在所述通信链路上依据变更后的TTI长度进行通信。
其中，所述生效时间为用于指示终端在所述通信链路上使用所述长度变更后的所述TTI的起始时间；或者所述生效时间是以终端接收到生效时间信息为开始的偏移值所表示的；或者所述生效时间是以终端接收到生效时间信息为开始的定时时间所表示的。
其中，所述生效时间预先配置于所述终端上或由网络设备发送给所述终端。若所述生效时间由所述网络设备发送给所述终端，则所述通信单元还用于接收所述生效时间。
所述通信单元，还用于接收网络设备发送的激活指示信息，所述激活指示信息用于激活所述生效时间。
若所述生效时间为至少两个生效时间，则所述通信单元用于在所述至少两个生效时间中选择的一个生效时间，在所述通信链路上依据变更后的TTI长度通信。其中，在所述至少两个生效时间中选择的一个生效时间是所述终端在所述至少两个生效时间中选择的一个生效时间，或者所述网络设备在所述至少两个生效时间中选择一个生效时间，并将所述选择的生效时间发送和/或指示给所述终端的一个生效时间。
可选的，所述生效时间和/或所述激活信息是所述通信单元通过无线资源控制RRC消息、广播消息、媒体接入层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式接收的。若所述生效时间和/或所述激活信息通过物理层信令接收，则所述激活指示信息是在下行控制信息DCI中所接收的；或者所述激活指示信息是利用DCI的时频资源隐式接收的；或者所述激活指示信息是利用DCI的加扰扰码隐式接收的。在所述生效时间是利用DCI的时频资源隐式接收的情况下，所述生效时间在所述DCI的时频资源位置满足公式：n＝nrumod N；或者满足公式：n＝(nru+m)mod N；其中，所述nru是用于终端下行控制信息所在的第一个无线单元的索引值，N 用于表示可选的生存时间的数目，n为选择的生存时间的顺序号，m为网络侧分配的固定数值，mod()表示求余运算。
可选的，所述生效时间为针对一个终端的生效时间，或者为针对小区的生效时间，或者为针对一组终端的生效时间。
另一种可能的设计中，第六方面涉及的终端的的处理单元可以是处理器，通信单元可以是接收器/发射器。所述终端还可以包括存储器，所述存储器用于与处理器耦合，其保存终端必要的程序指令和数据。
进一步的，所述终端还可以包括天线。
第七方面，提供一种通信方法，一种可能的实现方式中，网络设备确定信链路上传输时间间隔TTI长度发生变更的情况下，发送TTI长度变更信息，并指示终端依据所述TTI长度变更信息，在所述通信链路上更新发送混合自动重传请求HARQ反馈信息的时频资源，并在更新后的所述时频资源上发送所述HARQ反馈信息。终端接收网络设备发送的通信链路上传输时间间隔TTI长度变更信息，并依据所述TTI长度变更信息，在所述通信链路上更新发送混合自动重传请求HARQ反馈信息的时频资源，并在更新后的所述时频资源上发送所述HARQ反馈信息。
本发明实施例针对DL HARQ，在TTI变更时刻，终端在更新后的时频资源反馈HARQ反馈消息，能够避免发送和/或接收数据包的时频资源位置在TTI长度变更前后发生更迭，进而避免数据包的错发和错收。
另一种可能的实现方式中，所述网络设备发送新传传输块TB或者重传TB，指示终端停止发送HARQ反馈信息，并基于所述新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息；其中，所述新传TB或者所述重传TB是所述网络设备基于TTI长度变更前的HARQ的TB所接收的。所述终端停止发送HARQ反馈信息，并获取所述网络设备发送的新传传输块TB或者重传TB，基于所述新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息。
本发明实施例中网络设备向终端发送新传TB或者重传TB，终端基于所述 新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息，在TTI长度变更后的TB信息继续进行通信，能够免发送和/或接收数据包的时频资源位置在TTI长度变更前后发生更迭，进而避免数据包的错发和错收。
其中，所述终端依据所述TTI长度变更信息，在所述通信链路上更新发送HARQ反馈信息的时频资源之前，所述方法还包括：所述终端确定原本发送HARQ反馈信息的时间，在所述TTI长度变更时间之后。
可选的，更新后的时频资源为：在所述TTI长度变更后的通信链路上、时频资源位置与所述TTI长度变更前发送所述HARQ反馈信息的时频资源的TTI的起始位置时间最接近、且在所述时频资源起始时间位置处或者在所述时频资源时间起始位置之后的时频资源。
可选的，更新后的时频资源为：所述TTI长度变更后的下行TTI长度与上行TTI长度所对应指示位置处的时频资源；其中，所述TTI长度变更后的下行TTI长度与上行TTI长度与所述指示位置之间具有预设的对应关系。
可选的，更新后的时频资源为：时频资源位置与TTI长度变更后下行TTI长度与上行TTI长度所对应指示位置具有设定偏移量的时频资源；所述偏移量与所述TTI长度变更后的下行TTI长度与上行TTI长度之间具有对应关系。
其中，所述偏移量由网络设备发送给所述终端；或者所述偏移量预置于所述终端和所述网络设备上；或者所述偏移量由所述终端确定并发送给所述网络设备；或者所述偏移量由所述终端和所述网络设备共同协商。
可选的，更新后的时频资源为：所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度所对应的指示位置处的时频资源；其中，所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度，与所述指示位置之间具有预设的对应关系。
可选的，更新后的时频资源为：TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的 一个时频资源。
其中，至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ反馈信息的时频资源起始位置之后的时频资源。
可选的，在更新后的所述时频资源上发送所述HARQ反馈信息，包括：在更新后的所述时频资源上发送至少两个HARQ反馈消息。
其中，所述至少两个HARQ反馈消息通过绑定方式或者复用方式发送；或者所述至少两个HARQ反馈消息中携带有隐式HARQ标识信息或者显式HARQ标识信息；或者所述至少两个HARQ反馈消息为所述网络设备预先约定的需要发送的HARQ反馈消息；或者所述至少两个HARQ反馈消息为所用传输块TB的大小与当前TTI长度匹配的HARQ反馈消息；所述至少两个HARQ反馈消息为所述终端选择的HARQ反馈消息；所述至少两个HARQ反馈消息为TTI长度变更前和/或TTI长度变更后的HARQ反馈消息；所述至少两个HARQ反馈消息为按照预设优先级顺序选择的HARQ反馈消息。
可选的，所述更新后的时频资源位置是由所述网络设备发送给所述终端的；或者所述更新后的时频资源位置预置于所述终端和所述网络设备上；或者所述更新后的时频资源位置由所述终端确定并发送给所述网络设备；或者所述更新后的时频资源位置由所述终端和所述网络设备共同协商。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息为正确HARQ反馈信息；或者网络设备发送清零指示，指示将终端的HARQ进程的TB清零，或者将终端的HARQ进程清零。所述终端接收网络设备发送的清零指示，依据所述清零指示将终端的HARQ进程的TB清零，或者将终端的HARQ进程清零。
可选的，所述终端还可停止发送错误应答指令NACK信息。
可选的，在更新后的所述时频资源上发送所述HARQ应答信息之前，所述 网络设备选择并发送的HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息。所述终端可接收所述网络设备选择并发送的HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息。其中，在更新后的所述时频资源上发送的所述HARQ反馈信息为所述网络设备指示的HARQ标识对应的HARQ反馈信息。
其中，在更新后的所述时频资源上发送的所述HARQ反馈信息中可显式或者隐式包括HARQ标识信息。
可选的，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，网络设备可通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式发送所述TTI长度变更信息。所述终端可通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式接收所述TTI长度变更信息。
可选的，所述TTI长度变更信息为可一个终端的至少一个HARQ进程的TTI长度变更信息、一组终端的至少一个HARQ进程的TTI长度变更信息或者小区的至少一个HARQ进程的TTI长度变更信息。
可选的，所述TTI长度变更消息可包含于所述更新后的所述时频资源内。
本发明实施例通过上述几种可能的实施方式，能够避免UL HARQ过程中，TTI长度发生变更造成的数据包错发。
第八方面，提供一种网络设备，该网络设备具有实现上述第七方面中网络设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，所述网络设备包括处理单元和发送单元，其中，所述处理单元用于确定通信链路上传输时间间隔TTI长度发生变更，并指示终端依据所述TTI长度变更信息，在所述通信链路上更新发送混合自动重传 请求HARQ反馈信息的时频资源，并在更新后的所述时频资源上发送所述HARQ反馈信息。或者指示终端停止发送HARQ反馈信息，并基于所述新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息；其中，所述新传TB或者所述重传TB是所述网络设备基于TTI长度变更前的HARQ的TB所接收的。所述发送单元用于发送TTI长度变更信息或发送新传传输块TB或者重传TB。
所述处理单元，还用于在所述发送单元发送TTI长度变更信息之前，确定原本发送HARQ反馈信息的时间，在所述TTI长度变更时间之后。
可选的，更新后的时频资源为：在所述TTI长度变更后的通信链路上、时频资源位置与所述TTI长度变更前发送所述HARQ反馈信息的时频资源的TTI的起始位置时间最接近、且在所述时频资源起始时间位置处或者在所述时频资源时间起始位置之后的时频资源。
可选的，更新后的时频资源为：所述TTI长度变更后的下行TTI长度与上行TTI长度所对应指示位置处的时频资源；其中，所述TTI长度变更后的下行TTI长度与上行TTI长度与所述指示位置之间具有预设的对应关系。
所述处理单元，还用于指示终端在所述通信链路上更新发送HARQ反馈信息的时频资源之后，丢弃TTI长度变更生效之前的HARQ反馈信息。
可选的，更新后的时频资源为：时频资源位置与TTI长度变更后下行TTI长度与上行TTI长度所对应指示位置具有设定偏移量的时频资源；所述偏移量与所述TTI长度变更后的下行TTI长度与上行TTI长度之间具有对应关系。
其中，所述偏移量由网络设备发送给所述终端；或者所述偏移量预置于所述终端和所述网络设备上；或者所述偏移量由所述终端确定并发送给所述网络设备；或者所述偏移量由所述终端和所述网络设备共同协商。
可选的，更新后的时频资源为：所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度所对应的指示位置处的时频资源；其中，所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度，与所述 指示位置之间具有预设的对应关系。
可选的，更新后的时频资源为：TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
其中，至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ反馈信息的时频资源起始位置之后的时频资源。
所述发送单元，采用如下方式在更新后的所述时频资源上发送所述HARQ反馈信息：在更新后的所述时频资源上发送至少两个HARQ反馈消息。
所述发送单元，用于将所述至少两个HARQ反馈消息通过绑定方式或者复用方式发送；或者将所述至少两个HARQ反馈消息中携带有隐式HARQ标识信息或者显式HARQ标识信息；或者将所述至少两个HARQ反馈消息为所述网络设备预先约定的需要发送的HARQ反馈消息；或者将所述至少两个HARQ反馈消息为所用传输块TB的大小与当前TTI长度匹配的HARQ反馈消息。
其中，所述发送单元发送的所述至少两个HARQ反馈消息可为所述终端选择的HARQ反馈消息；或者所述发送单元发送的所述至少两个HARQ反馈消息为TTI长度变更前和/或TTI长度变更后的HARQ反馈消息；或者所述发送单元发送的所述至少两个HARQ反馈消息为按照预设优先级顺序选择的HARQ反馈消息。
可选的，所述更新后的时频资源位置是由所述网络设备发送给所述终端的；或者所述更新后的时频资源位置预置于所述终端和所述网络设备上；或者所述更新后的时频资源位置由所述终端确定并发送给所述网络设备；或者所述更新后的时频资源位置由所述终端和所述网络设备共同协商。
可选的，所述处理单元还用于确定未接收到所述终端发送的错误应答指 令NACK信息。所述发送单元，还用于发送清零指示，所述清零指示用于指示将终端的HARQ进程的TB清零，或者将终端的HARQ进程清零。
可选的，所述处理单元还用于选择HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息，所述发送单元还用于选择并发送的HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息为所述网络设备指示的HARQ标识对应的HARQ反馈信息。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息中显式或者隐式包括HARQ标识信息。
其中，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，所述发送单元通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述TTI长度变更信息。
其中，所述TTI长度变更信息为一个终端的至少一个HARQ进程的TTI长度变更信息、一组终端的至少一个HARQ进程的TTI长度变更信息或者小区的至少一个HARQ进程的TTI长度变更信息。
可选的，所述TTI长度变更消息可包含于更新后的所述时频资源内。
另一种可能的设计中，第八方面中的网络设备的处理单元可以是处理器，发送单元可以收发器。所述处理器被配置为支持网络设备执行上述方法中相应的功能，所述收发器被配置为支持用于支持网络设备与终端或其他网络实体之间的通信。进一步的，所述网络设备还可以包括存储器，所述存储器用于与处理器耦合，其保存网络设备必要的程序指令和数据。
其中，所述网络设备可以为基站设备。
第九方面，提供一种终端，该终端具有实现上述第七方面中终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。 所述硬件或软件包括一个或多个与上述功能相对应的模块。
一种可能的设计中，所述终端包括接收单元、处理单元和发送单元。所述接收单元用于接收网络设备发送的通信链路上传输时间间隔TTI长度变更信息。所述处理单元用于依据所述接收单元接收的所述TTI长度变更信息，在所述通信链路上更新发送混合自动重传请求HARQ反馈信息的时频资源。所述发送单元用于在更新后的所述时频资源上发送所述HARQ反馈信息。或者
所述接收单元，用于获取所述网络设备发送的新传传输块TB或者重传TB。所述处理单元用于停止发送HARQ反馈信息，并基于所述接收单元接收的所述新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息。所述发送单元用于基于TTI长度变更前的HARQ的TB发送新传TB或者所述重传TB。
所述处理单元，还用于依据所述TTI长度变更信息，在所述通信链路上更新发送HARQ反馈信息的时频资源之前，确定原本发送HARQ反馈信息的时间，在所述TTI长度变更时间之后。
可选的，更新后的时频资源为：在所述TTI长度变更后的通信链路上、时频资源位置与所述TTI长度变更前发送所述HARQ反馈信息的时频资源的TTI的起始位置时间最接近、且在所述时频资源起始时间位置处或者在所述时频资源时间起始位置之后的时频资源。
可选的，更新后的时频资源为：所述TTI长度变更后的下行TTI长度与上行TTI长度所对应指示位置处的时频资源。其中，所述TTI长度变更后的下行TTI长度与上行TTI长度与所述指示位置之间具有预设的对应关系。
所述处理单元，还用于在所述通信链路上更新发送HARQ反馈信息的时频资源之后，丢弃TTI长度变更生效之前的HARQ反馈信息。
可选的，更新后的时频资源为：时频资源位置与TTI长度变更后下行TTI长度与上行TTI长度所对应指示位置具有设定偏移量的时频资源；所述偏移量与所述TTI长度变更后的下行TTI长度与上行TTI长度之间具有对应关系。
其中，所述偏移量由网络设备发送给所述终端；或者所述偏移量预置于 所述终端和所述网络设备上；或者所述偏移量由所述终端确定并发送给所述网络设备；或者所述偏移量由所述终端和所述网络设备共同协商。
可选的，更新后的时频资源为：所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度所对应的指示位置处的时频资源；其中，所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度，与所述指示位置之间具有预设的对应关系。
可选的，更新后的时频资源为：TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
其中，至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ反馈信息的时频资源起始位置之后的时频资源。
所述发送单元，具体采用如下方式在更新后的所述时频资源上发送所述HARQ反馈信息：在更新后的所述时频资源上发送至少两个HARQ反馈消息。
其中，所述至少两个HARQ反馈消息通过绑定方式或者复用方式发送；或者所述至少两个HARQ反馈消息中携带有隐式HARQ标识信息或者显式HARQ标识信息；或者所述至少两个HARQ反馈消息为所述网络设备预先约定的需要发送的HARQ反馈消息；或者所述至少两个HARQ反馈消息为所用传输块TB的大小与当前TTI长度匹配的HARQ反馈消息；所述至少两个HARQ反馈消息为所述终端选择的HARQ反馈消息；所述至少两个HARQ反馈消息为TTI长度变更前和/或TTI长度变更后的HARQ反馈消息；所述至少两个HARQ反馈消息为按照预设优先级顺序选择的HARQ反馈消息。
可选的，所述更新后的时频资源位置是由所述网络设备发送给所述终端的；或者所述更新后的时频资源位置预置于所述终端和所述网络设备上；或 者所述更新后的时频资源位置由所述终端确定并发送给所述网络设备；或者所述更新后的时频资源位置由所述终端和所述网络设备共同协商。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息为正确HARQ反馈信息。
可选的，所述接收单元，还用于接收网络设备发送的清零指示，所述清零指示用于指示将终端的HARQ进程的TB清零，或者将终端的HARQ进程清零。
所述发送单元，还用于停止发送错误应答指令NACK信息。
可选的，在更新后的所述时频资源上发送所述HARQ应答信息之前，所述接收单元还用于接收所述网络设备选择并发送的HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息。
其中，在更新后的所述时频资源上发送的所述HARQ反馈信息为所述网络设备指示的HARQ标识对应的HARQ反馈信息。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息中可显式或者隐式包括HARQ标识信息。
其中，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，所述接收单元通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式接收所述TTI长度变更信息。
其中，所述TTI长度变更信息可为一个终端的至少一个HARQ进程的TTI长度变更信息、一组终端的至少一个HARQ进程的TTI长度变更信息或者小区的至少一个HARQ进程的TTI长度变更信息。
可选的，所述TTI长度变更消息可包含于所述更新后的所述时频资源内。
另一种可能的设计中，第九方面涉及的终端的的处理单元可以是处理器，接收单元可以是接收器，发送单元可以是发射器。所述终端还可以包括存储 器，所述存储器用于与处理器耦合，其保存终端必要的程序指令和数据。
进一步的，所述终端还可以包括天线。
第十方面，提供一种通信方法，该方法中网络设备确定通信链路上的传输时间间隔TTI长度变更的情况下，所述网络设备发送TTI长度变更指令，所述TTI长度变更指令用于指示终端通信的通信链路上的TTI长度发生变更。终端接收网络设备发送的传输时间间隔TTI长度变更指令；所述终端依据所述TTI长度变更指令通信。
可选的，若所述终端接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之后，或者所述终端同时接收到所述上行授权和所述TTI长度变更指令，则所述终端依据所述上行授权，在所述TTI长度发生变更的通信链路上发送和/或数据。若所述终端接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之前，则所述终端丢弃所述上行授权对应的时频资源。
可选的，网络设备可发送用于指示上行授权有效与否的指示信息。所述终端依据所述TTI长度变更指令发送数据之前，接收所述网络设备发送的、用于指示上行授权有效与否的指示信息。
可选的，所述终端在UL授权资源上发送携带有混合自动重传请求HARQ标识的TB数据。
可选的，所述网络设备可发送物理层信息；其中，所述物理层信息用于指示依据上行授权发送数据，或者依据长度变更后TTI发送数据。所述终端依据所述TTI长度变更指令发送数据之前，接收所述网络设备发送的物理层信息。
可选的，所述网络设备确定通信链路上的TTI长度变更之后，可重新发送上行授权。所述终端依据所述TTI长度变更指令发送数据之前，接收网络设备重新发送的上行授权。
可选的，所述终端依据所述TTI长度变更指令发送数据，包括：所述终端依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上通信；其中，更新后的时频资源为TTI长度变更前发送所述HARQ应答信息的 时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
所述至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ应答信息的时频资源起始位置之后的时频资源。
可选的，所述终端依据所述TTI长度变更指令发送数据，包括：所述终端依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上发送至少两个数据。
其中，所述至少两个数据通过绑定方式或者复用方式发送；或者所述至少两个数据中携带有隐式数据标识信息或者显式数据标识信息；或者所述至少两个数据为所述网络设备预先约定的需要发送的数据；或者所述至少两个数据为所用传输块TB的大小与当前TTI长度匹配的数据；所述至少两个数据为所述终端选择的数据；所述至少两个数据为TTI长度变更前和/或TTI长度变更后的数据；所述至少两个数据为按照预设优先级顺序选择的数据。
可选的，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，若所述TTI长度变更指令指示的TTI长度由低于1ms的短TTI变更为1msTTI，且所述终端在所述TTI长度变更指令生效之前发送数据、并在所述TTI长度变更指令生效之后接收网络设备对所述数据进行自动重传请求HARQ反馈的反馈信息，则所述网络设备发送对所述数据进行HARQ反馈的HARQ标识或者对所述数据进行HARQ反馈的数据标识，所述终端接收网络设备发送的、对所述数据进行HARQ反馈的HARQ标识或者对所述数据进行HARQ反馈的数据标识。或者所述网络设备发送指示信息，所述指示信息用于指示是否对所述数据进行HARQ反馈的HARQ标识或者用于指示是否对所述数据进行HARQ反馈的数据标识，所述终端接收网络设备发送的指示信息。或者所述网 络设备发送对所述数据进行HARQ反馈的HARQ反馈信息中发生冲突的第一个HARQ的反馈信息或者高优先级的HARQ的反馈信息。所述终端接收网络设备发送的、对所述数据进行HARQ反馈的HARQ反馈信息中发生冲突的第一个HARQ的反馈信息或者高优先级的HARQ的反馈信息。
其中，所述HARQ标识或所述数据标识通过下行控制信息DCI发送或接收；或者所述HARQ标识或所述数据标识与物理混合自动请求重传指示信道PHICH的位置信息关联。
可选的，所述终端通过传输HARQ标识和/或HARQ反馈信息的传输块的时频资源，获取传输所述HARQ反馈信息的时频资源；所述时频资源中包括低于1ms的短TTI的时间信息。
可选的，所述终端获取HARQ反馈信息之后，所述终端以变更后TTI为基准，执行同步HARQ。
第十一方面，提供一种网络设备，该网络设备具有实现上述第十方面中网络设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
一种可能的设计中，所述网络设备处理单元和发送单元，所述处理单元用于确定通信链路上的传输时间间隔TTI长度变更，并确定用于指示终端通信链路上的TTI长度发生变更，并指示所述终端依据所述TTI长度变更指令进行通信的TTI长度变更指令。所述发送单元用于发送TTI长度变更指令。
所述处理单元确定通信链路上的TTI长度变更之后，所述发送单元还用于发送用于指示上行授权有效与否的指示信息。
所述处理单元确定通信链路上的TTI长度变更之后，所述发送单元还用于发送物理层信息；其中，所述物理层信息用于指示依据上行授权发送数据，或者依据长度变更后TTI发送数据。
所述处理单元确定通信链路上的TTI长度变更之后，所述发送单元还用于重新发送上行授权。
所述处理单元，具体采用如下方式指示所述终端依据所述TTI长度变更 指令进行通信：若所述终端接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之后，或者所述终端同时接收到所述上行授权和所述TTI长度变更指令，则指示所述终端依据所述上行授权，在所述TTI长度发生变更的通信链路上进行通信。若所述终端接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之前，则指示所述终端丢弃所述上行授权对应的时频资源。
所述处理单元，具体采用如下方式指示所述终端依据所述TTI长度变更指令进行通信：指示所述终端依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上进行通信。其中，更新后的时频资源为TTI长度变更前发送所述HARQ应答信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
其中，所述至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ应答信息的时频资源起始位置之后的时频资源。
所述处理单元，具体采用如下方式指示所述终端依据所述TTI长度变更指令发送数据：指示所述终端依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上发送至少两个数据。
其中，所述至少两个数据通过绑定方式或者复用方式发送；或者所述至少两个数据中携带有隐式数据标识信息或者显式数据标识信息；或者所述至少两个数据为所述网络设备预先约定的需要发送的数据；或者所述至少两个数据为所用传输块TB的大小与当前TTI长度匹配的数据；所述至少两个数据为所述终端选择的数据；所述至少两个数据为TTI长度变更前和/或TTI长度变更后的数据；所述至少两个数据为按照预设优先级顺序选择的数据。
可选的，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI 内变更。
可选的，若所述TTI长度变更指令指示的TTI长度由低于1ms的短TTI变更为1msTTI，且所述发送单元在所述TTI长度变更指令生效之前发送数据、且所述接收单元在所述TTI长度变更指令生效之后接收网络设备对所述数据进行自动重传请求HARQ反馈的反馈信息，则所述发送单元还用于：
发送对所述数据进行HARQ反馈的HARQ标识或者对所述数据进行HARQ反馈的数据标识；或者发送指示信息，所述指示信息用于指示是否对所述数据进行HARQ反馈的HARQ标识或者用于指示是否对所述数据进行HARQ反馈的数据标识；或者发送对所述数据进行HARQ反馈的HARQ反馈信息中发生冲突的第一个HARQ的反馈信息或者高优先级的HARQ的反馈信息。
其中，所述发送单元发送的所述HARQ标识或所述数据标识通过下行控制信息DCI发送。或者所述发送单元发送的所述HARQ标识或所述数据标识与物理混合自动请求重传指示信道PHICH的位置信息关联。
所述处理单元，还用于指示所述终端通过传输HARQ标识和/或HARQ反馈信息的传输块的时频资源，获取传输所述HARQ反馈信息的时频资源。其中，所述时频资源中包括低于1ms的短TTI的时间信息。
所述处理单元，还用于指示所述终端获取HARQ反馈信息之后，以变更后TTI为基准，执行同步HARQ。
另一种可能的设计中，第十一方面涉及的网络设备包括的处理单元可以是处理器，发送单元可以收发器。所述处理器被配置为支持网络设备执行上述方法中相应的功能，所述收发器被配置为支持用于支持网络设备与终端或其他网络实体之间的通信。进一步的，所述网络设备还可以包括存储器，所述存储器用于与处理器耦合，其保存网络设备必要的程序指令和数据。
其中，所述网络设备可以为基站设备。
第十二方面，提供一种终端，该终端具有实现上述第十方面中终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。 所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的设计中，所述终端包括接收单元和发送单元。其中，所述接收单元，用于接收网络设备发送的传输时间间隔TTI长度变更指令，所述TTI长度变更指令用于指示终端发送和/或接收数据的通信链路上的TTI长度发生变更。所述发送单元用于依据所述TTI长度变更指令发送数据。
可选的，所述发送单元，采用如下方式依据所述TTI长度变更指令发送数据：若所述接收单元接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之后，或者所述接收单元同时接收到所述上行授权和所述TTI长度变更指令，则所述发送单元依据所述上行授权，在所述TTI长度发生变更的通信链路上发送数据。若所述接收单元接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之前，则所述发送单元丢弃所述上行授权对应的时频资源。
所述接收单元还用于，在所述发送单元依据所述TTI长度变更指令发送数据之前，接收所述网络设备发送的、用于指示上行授权有效与否的指示信息。
所述发送单元，还用于在UL授权资源上发送携带有混合自动重传请求HARQ标识的TB数据。
所述接收单元，还用于在所述发送单元依据所述TTI长度变更指令发送数据之前，接收所述网络设备发送的物理层信息；其中，所述物理层信息用于指示依据上行授权发送数据，或者依据长度变更后TTI发送数据。
所述接收单元，还用于在所述发送单元依据所述TTI长度变更指令发送数据之前，接收网络设备重新发送的上行授权。
所述发送单元，具体采用如下方式依据所述TTI长度变更指令发送数据：
依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上发送数据。其中，更新后的时频资源为TTI长度变更前发送所述HARQ应答信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
其中，所述至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ应答信息的时频资源起始位置之后的时频资源。
所述发送单元，具体采用如下方式依据所述TTI长度变更指令发送数据：
依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上发送至少两个数据。其中，所述至少两个数据通过绑定方式或者复用方式发送；或者所述至少两个数据中携带有隐式数据标识信息或者显式数据标识信息；或者所述至少两个数据为所述网络设备预先约定的需要发送的数据；或者所述至少两个数据为所用传输块TB的大小与当前TTI长度匹配的数据；所述至少两个数据为所述终端选择的数据；所述至少两个数据为TTI长度变更前和/或TTI长度变更后的数据；或者所述至少两个数据为按照预设优先级顺序选择的数据。
可选的，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，若所述TTI长度变更指令指示的TTI长度由低于1ms的短TTI变更为1msTTI，且所述发送单元在所述TTI长度变更指令生效之前发送数据、且所述接收单元在所述TTI长度变更指令生效之后接收网络设备对所述数据进行自动重传请求HARQ反馈的反馈信息，则所述接收单元，还用于：
接收网络设备发送的、对所述数据进行HARQ反馈的HARQ标识或者对所述数据进行HARQ反馈的数据标识；或者接收网络设备发送的指示信息，所述指示信息用于指示是否对所述数据进行HARQ反馈的HARQ标识或者用于指示是否对所述数据进行HARQ反馈的数据标识；或者接收网络设备发送的、对所述数据进行HARQ反馈的HARQ反馈信息中发生冲突的第一个HARQ的反馈信息或者高优先级的HARQ的反馈信息。
其中，所述接收单元通过下行控制信息DCI接收所述HARQ标识或所述数据标识。
可选的，所述HARQ标识或所述数据标识与物理混合自动请求重传指示信道PHICH的位置信息关联。
可选的，所述接收单元，还用于通过传输HARQ标识和/或HARQ反馈信息的传输块的时频资源，获取传输所述HARQ反馈信息的时频资源。其中，所述时频资源中包括低于1ms的短TTI的时间信息。
可选的，所述接收单元获取HARQ反馈信息之后，所述发送单元以变更后TTI为基准，执行同步HARQ。
另一种可能的设计中，第十二方面涉及的终端的接收单元可以是接收器，发送单元可以是发射器。所述终端还可以包括处理器和存储器，所述存储器用于与所述处理器耦合，其保存终端必要的程序指令和数据。
进一步的，所述终端还可以包括天线。
本发明实施例上述各方面的通信方法、网络设备及终端，可以在TTI长度变更情况下，保证DL HARQ进程和UL HARQ进程中数据包的正确发送和正确接收。
附图说明
图1为本发明实施例提供的无线***架构示意图；
图2为LTE网络中UE与无线接入网中的eNB进行数据传输的***示意图；
图3为本发明实施例提供的第一种通信方法的实施流程图；
图4为本发明实施例提供的第二种通信方法的一种实施流程图；
图5为本发明实施例提供的第二种通信方法的另一种实施流程图；
图6为本发明实施例提供的第二种通信方法的又一种实施流程图；
图7为本发明实施例提供的第三种通信方法的实施流程图；
图8为本发明实施例提供的第四种通信方法的实施流程图；
图9为本发明实施例中确定时频资源位置的示意图；
图10为本发明实施例提供的第五种通信方法的实施流程图；
图11为本发明第一实施例提供的网络设备的一种结构示意图；
图12为本发明第一实施例提供的网络设备的另一种结构示意图；
图13为本发明第一实施例提供的终端的一种结构示意图；
图14为本发明第一实施例提供的终端的另一种结构示意图；
图15为本发明第二实施例提供的网络设备的一种结构示意图；
图16为本发明第二实施例提供的网络设备的另一种结构示意图；
图17为本发明第二实施例提供的终端的一种结构示意图；
图18为本发明第二实施例提供的终端的另一种结构示意图；
图19为本发明第三实施例提供的网络设备的一种结构示意图；
图20为本发明第三实施例提供的网络设备的另一种结构示意图；
图21为本发明第三实施例提供的终端的一种结构示意图；
图22为本发明第三实施例提供的终端的另一种结构示意图；
图23为本发明第四实施例提供的网络设备的一种结构示意图；
图24为本发明第四实施例提供的网络设备的另一种结构示意图；
图25为本发明第四实施例提供的终端的一种结构示意图；
图26为本发明第四实施例提供的终端的另一种结构示意图。
具体实施方式
下面将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详细地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。
如图1所示，终端通过无线接入网(Radio Access Network，RAN)及核心网(Core Network，CN)接入IP多媒体子***(IP Multimedia Subsystem，IMS)网络。
本发明实施例涉及的通信方法，主要针对终端与无线接入网中的网络设备进行数据传输的过程。所述终端可以包括各种具有无线通信功能的手持设 备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile station，MS)，终端设备(Terminal Equipment)等等。所述网络设备可以包括各种在无线接入网中为终端提供通信功能的装置，例如可以是基站，该基站可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的***中，基站的名称可能会有所不同，例如在长期演进(Long Term Evolution，LTE)网络中，称为演进的节点B(evolved NodeB，简称：eNB或者eNodeB),在第三代3G网络中，称为节点B(Node B)等等。
本发明实施例描述的技术可以适用于LTE***，或其他采用各种无线接入技术的无线通信***，例如采用码分多址，频分多址，时分多址，正交频分多址，单载波频分多址等接入技术的***。此外，还可以适用于使用LTE***后续的演进***，如第五代5G***等。为清楚起见，本发明实施例以下仅以LTE***为例进行说明，所述终端为UE，所述网络设备为eNB。
图2所示为LTE网络中UE与无线接入网中的eNB进行数据传输的***示意图。UE与eNB进行数据传输过程中通过混合自动重传请求(Hybrid Automatic Repeatre Quest，HARQ)进程来提高数据传输的可靠性。本发明实施例中主要针对DL HARQ进程和ULHARQ进程进行说明，其中，DL HARQ进程中，eNB向UE发送数据包，UE接收到数据包后对接收到的数据包进行HARQ反馈并发送HARQ反馈消息，所述HARQ反馈消息包括正确应答指令(ACKnowledge，ACK)或错误应答指令(Negative ACKnowledge，NACK)信息。UL HARQ进程中，UE向eNB发送数据包，eNB接收UE发送的数据包并发送HARQ反馈消息。
目前，UE与eNB进行数据传输过程中，由于业务需求，可能会出现TTI长度变更的情况，此时会导致DL HARQ进程和ULHARQ进程中产生数据包的错误接收或错误发送，进而导致传输速率和***容量的下降。本发明实施例提供一种通信方法，以在TTI长度变更情况下，保证DL HARQ进程和UL HARQ进程中数据包的正确发送和正确接收。
图3所示为本发明实施例提供的第一种通信方法，如图3所示，包括：
S101：eNB确定通信链路上的TTI长度发生变更。
本发明实施例中TTI长度发生变更的通信链路可以是网络设备与UE之间的链路，也可以是UE与UE之间的链路，所述链路包括上行链路和下行链路，所述上行链路和下行链路可以采用时分双工(Time Division Duplex，TDD)方式传输数据，也可采用频分双工(Frequency division duplex，FDD)方式传输数据。
本发明实施例中所述TTI长度发生变更包括TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；或者TTI长度在低于1ms的短TTI内变更。
具体的，本发明实施例中所述TTI长度发生变更可以是变更为和原有TTI不同的长度，也可以变更为和原有TTI相同的长度。
S102：eNB确定TTI长度变更前的传输块(Transport Block，TB)不能在TTI长度变更后的通信链路上传输。
具体的，每个HARQ进程在上行或下行传输时，占用一个TB或者两个TB。这个TB已经按照变更前的TTI进行了资源分配和编码调制的设置，而变更后的TTI可能不能使用这种资源分配和编码调制方法，即TTI长度变更前的TB不能在TTI长度变更后的通信链路上传输。本发明实施例中若TTI长度变更前的TB不能在TTI长度变更后的通信链路上传输，则可执行S103。
可以理解的是，在具体实施过程中，也可不确定TTI长度变更前的HARQ的TB是否能在TTI长度变更后的通信链路上传输，直接执行S103，即S102为可选步骤。
S103：eNB向UE发送指示信息，所述指示信息用于指示将至少一个HARQ进程的TB清零。
可选的，本发明实施例中将HARQ进程的TB清零，可以将HARQ进程中的所有TB清零，也可以是将HARQ进程中的一个TB或者两个TB清零，还可以是将HARQ进程中指定的TB清零。
可选的，本发明实施例中，所述指示信息指示清零的HARQ进程可以是将一个UE的至少一个HARQ进程的TB清零；或者将一组UE的至少一个HARQ进程的TB清零；或者将小区的至少一个HARQ进程的TB清零。
其中，所述至少一个HARQ进程可以是全部HARQ进程，或者指定的HARQ进程。所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量(Quality of Service，QoS)需求的HARQ进程。
可选的，本发明实施例中所述指示信息可通过无线资源控制(Radio Resource Control，RRC)消息、广播消息、媒体接入控制层(Medium Access Control，MAC)控制元素(Control Element，CE)和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式发送。
进一步的，若所述指示信息通过物理层信令发送，则所述指示信息通过物理层信令所在资源隐式发送；或者所述指示信息通过在下行控制信息(Downlink Control Information，DCI)中包含的新数据到达被翻转指示信息(NDI is toggled)发送。
可选的，本发明实施例中所述eNB可通过显示或者隐式方式，指示所述UE将至少一个HARQ进程的TB清零。
S104：UE接收eNB发送的用于指示将至少一个HARQ进程的TB清零的指示信息，并依据所述指示信息，将所述UE的至少一个HARQ进程的TB清零。
本发明实施例中为使HARQ进程中传输的数据能够正确发送和接收，可在eNB确定TTI长度变更的情况下，向UE发送将HARQ进程的TB清零的指示信息，以使UE将HARQ进程中的TB清零，并在变更后的TTI长度的TB中重新传输数据，保证数据的正确发送和接收。
图4所示为本发明实施例提供的第二种通信方法，如图4所示，包括：
S201：eNB确定通信链路上的TTI长度发生变更。
S202：eNB向UE发送指示信息，所述指示信息用于指示在变更后的TTI长度所在的频域资源上进行通信。
本发明实施例中，所述指示在变更后的TTI长度所在的频域资源上与UE进行通信，是指丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与UE进行通信，其中与UE进行通信的数据为TTI长度变更前的HARQ进程的TB相关的发送和/或接收的数据。
S203：UE接收eNB发送的指示信息，并依据所述指示信息在变更后的TTI长度所在的频域资源上进行通信。
本发明实施例中，按照所述指示信息，丢弃eNB已配置给UE的基于TTI长度变更前的频域资源，并在TTI长度变更后的频域资源上与eNB进行通信，其中与eNB进行通信的数据为TTI长度变更前的HARQ进程的TB上发送和/或接收的数据。
本发明实施例中，eNB可通过RRC消息、广播消息、MAC CE和物理层信令中的至少之一或者组合，将用于指示在变更后的TTI长度所在的频域资源上进行通信的指示信息以显式方式发送或者以隐式方式发送。UE则按照相应的方式进行接收。
可选的，若用于指示在变更后的TTI长度所在的频域资源上进行通信的指示信息通过物理层信令发送，则所述指示信息可DCI发送。其中，所述DCI中还携带可HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
可选的，本发明实施例中eNB与UE按照所述指示信息在变更后的TTI长度所在的频域资源上进行通信后，还可包括如下步骤，如图5所示：
S204：eNB接收UE发送的数据。
S205：eNB在下行链路上依据变更后的TTI长度发送HARQ反馈信息，并向UE发送所述HARQ反馈信息的HARQ标识信息。
S206：UE接收所述eNB发送的HARQ反馈信息以及HARQ反馈信息的HARQ标识信息，并依据所述HARQ反馈信息的HARQ标识信息和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
可选的，本发明实施例中HARQ反馈信息的HARQ标识信息和所述TTI 长度变更前的HARQ标识信息可相同或者也可不同。无论相同或者不同，UE都能够将所述变更前的HARQ标识信息和所述HARQ反馈信息的HARQ标识信息关联到一个HARQ进程。
本发明实施例中，所述HARQ反馈信息包括HARQ ACK或HARQ NACK。
可选的，若所述HARQ反馈信息为HARQ NACK，则还可包括如下步骤，如图6所示：
S207：eNB向UE发送上行授权信息，并向UE发送所述上行授权信息对应的HARQ标识信息。
S208：UE接收所述eNB发送的上行授权信息以及上行授权信息的HARQ标识信息，并依据所述上行授权信息的HARQ标识信息和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
本发明实施例中，若HARQ进程为至少两个HARQ进程，则UE进行HARQ处理时，可对所述至少两个HARQ进程合并处理。
本发明实施例中，在TTI长度发生变更时，eNB向UE发送用于指示在变更后的TTI长度所在的频域资源上进行通信的指示信息，使得UE可以依据所述指示信息丢弃TTI长度变更前的数据，并在变更后的TTI长度所在的频域资源上进行通信，能够避免数据包的错发和错收。
图7为本发明实施例提供的第三种通信方法，如图7所示，包括：
S301：eNB确定通信链路上的TTI长度发生变更。
S302：eNB向UE发送用于指示UE按照TTI长度变更的生效时间，在所述通信链路上依据变更后的TTI长度进行通信的指示信息。
本发明实施例中所述通信包括数据包的发送、接收或者发送和接收，以下表示为数据包的发送和/或接收。所述生效时间满足使UE在按照变更后的TTI长度进行通信前，能够最大程度的完成和eNB之间进行通信的数据包的发送和/或接收，以避免发送和/或接收数据包的时频资源位置在TTI长度变更前后发生更迭。
本发明实施例中所述生效时间的表现形式可以有多种，例如可以是用于指示UE在所述通信链路上使用所述长度变更后的所述TTI的起始时间，可以是以UE接收到生效时间信息为开始的偏移值所表示的，还可以是以UE接收到生效时间信息为开始的定时时间所表示的。
其中，所述生效时间的起始时间可以通过绝对时间表示，所述生效时间的起始时间也可用无线帧和或子帧号表示。
本发明实施例中，所述生效时间可以是预先配置于UE上，也可以由eNB发送给所述UE。
可选的，本发明实施例中所述生效时间可以是eNB提前发送给UE的，也可以是在确定TTI长度发生变更后，实时发送给UE的。
本发明实施例中，可通过eNB向UE发送用于激活所述生效时间的激活指示信息，激活所述生效时间，以指示UE按照TTI长度变更的生效时间，在所述通信链路上依据变更后的TTI长度进行通信。
本发明实施例中所述生效时间为针对一个UE的生效时间，或者为针对小区的生效时间，或者为针对一组UE的生效时间。
本发明实施例中可以设定多个生效时间，若预设的生效时间的数量不止一个，即生效时间的数量为至少两个，则eNB可以向UE发送指示信息，以指示UE在所述至少两个生效时间中选择一个生效时间，并指示UE按照选择的生效时间，在所述通信链路上依据变更后的TTI长度发送和/或接收数据。
本发明实施例中生效时间的数量为至少两个的情况下，还可以由eNB在所述至少两个生效时间中选择一个生效时间，并将所述选择的生效时间发送和/或指示给所述UE，并指示所述UE按照选择的生效时间，在所述通信链路上依据变更后的TTI长度发送和/或接收数据。
需要说明的是，本发明实施例中涉及的eNB指示UE执行相应操作，可以理解为是eNB向UE发送指令或者消息，通过所述指令或者消息指示UE执行相应操作。例如，eNB指示UE按照TTI长度变更的生效时间，在所述通信链路上依据变更后的TTI长度进行通信，可以通过eNB向UE发送一个 消息，通过所述消息指示TTI长度变更的生效时间，并指示UE在该生效时间开始使用变更后的TTI长度进行通信。
本发明实施例中上述涉及的eNB向UE发送生效时间、激活指示信息或者其它指示信息，可以通过RRC消息、广播消息、MAC CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式发送。
可选的，若通过物理层信令发送所述生效时间和所述激活信息，则所述生效时间和激活指示信息可在下行控制信息DCI中所发送，或者利用DCI的时频资源隐式发送，或者利用DCI的加扰扰码隐式发送。
其中，在DCI上加扰扰码，不占用DCI的物理资源，并能将所需信息传给终端。
可选的，若所述生效时间和激活指示信息是利用DCI的时频资源隐式发送的，则可以利用视频资源位置映射所述生效时间。
例如，可通过公式n＝nrumod N；或者公式n＝(nru+m)mod N，映射所述生效时间。其中，所述nru是用于UE下行控制信息所在的第一个无线单元的索引值，N用于表示可选的生存时间的数目，n为选择的生存时间的顺序号，m为网络侧分配的固定数值，mod()表示求余运算。
S303：UE接收UE发送的所述指示信息，并按照TTI长度变更的生效时间，在所述通信链路上依据变更后的TTI长度进行通信。
本发明实施例中，所述UE可通过接收eNB发送的激活指示信息，激活预先设置于UE上的所述生效时间或激活eNB发送给所述UE的生效时间。
可选的，若所述生效时间为至少两个生效时间，则所述UE可按照在所述至少两个生效时间中选择的一个生效时间，在所述通信链路上依据变更后的TTI长度发送和/或接收数据。
其中，所述UE可在所述至少两个生效时间中选择一个生效时间，或者接收eNB所选择并发送或指示的生效时间。
本发明实施例中，TTI长度发生变更时，eNB指示UE按照TTI长度变更 的生效时间，在TTI长度变更后的通信链路上进行通信，使得UE能够最大程度的完成和eNB之间进行通信的数据包的发送和/或接收，以避免发送和/或接收数据包的时频资源位置在TTI长度变更前后发生更迭，进而避免数据包的错发和错收。
图8为本发明实施例提供的第四种通信方法，如图8所示，包括：
S401：eNB确定通信链路上TTI长度发生变更。
S402：eNB将TTI长度变更信息发送给UE，并指示UE依据所述TTI长度变更信息，在所述通信链路上更新发送HARQ反馈信息的时频资源，并在更新后的所述时频资源上发送所述HARQ反馈信息。
其中，eNB可通过RRC消息、广播消息、MAC CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式发送所述TTI长度变更信息。
可选的，所述TTI长度变更消息可包含于所述更新后的所述时频资源内。
可选的，所述TTI长度变更信息为一个UE的至少一个HARQ进程的TTI长度变更信息、一组UE的至少一个HARQ进程的TTI长度变更信息或者小区的至少一个HARQ进程的TTI长度变更信息。
S403：UE接收eNB发送的通信链路上传输时间间隔TTI长度变更信息，并依据所述TTI长度变更信息，在所述通信链路上更新HARQ反馈信息的时频资源，并在更新后的所述时频资源上发送所述HARQ反馈信息。
可选的，所述UE可在确定原本发送HARQ反馈信息的时间，在所述TTI长度变更时间之后情况下，依据所述TTI长度变更信息，在所述通信链路上更新发送HARQ反馈信息的时频资源。
本发明实施例中以下将对依据所述TTI长度变更信息，在所述通信链路上更新HARQ反馈信息的时频资源，并在更新后的所述时频资源上发送所述HARQ反馈信息的具体实现方式进行详细说明。
方式一：eNB和UE协商确定更新后的时频资源为：在所述TTI长度变更后的通信链路上、时频资源位置与所述TTI长度变更前发送所述HARQ反 馈信息的时频资源的TTI的起始位置时间最接近、且在所述时频资源起始时间位置处或者在所述时频资源时间起始位置之后的时频资源。
例如，图9中，TTI长度变更前发送所述HARQ反馈信息的时频资源的TTI的起始位置为标号为1的时域符号，则在TTI长度变更后的时频资源上，与所述标号为1的时域符号起始位置最接近的时域符号为标号为2的时域符号，则更新后的时频资源可以是标号为2以及其之后的标号为3、4等的时域符号对应的时频资源。
方式二：eNB和UE预设所述TTI长度变更后的下行TTI长度与上行TTI长度与所述指示位置之间的对应关系，并协商确定更新后的时频资源为：TTI长度变更后的下行TTI长度与上行TTI长度所对应指示位置处的时频资源。
其中，TTI长度变更后的下行TTI长度与上行TTI长度与所述指示位置之间的对应关系可参考表1所示：
下行/上行 2os/2os 7os/7os 2os/7os 7os/2os 2os/4os 7os/4os 14os/14os
指示位置 N+6 N+3 N+4 N+7 N+K N+K  
表1
其中，表1中指示位置中的数值是指在配置后下行/上行的TTI长度下，若在子帧N获取传输块，在N+6TTI UE向eNB发送HARQ反馈，这里的数值6为TTI的个数，包括现有的1ms的TTI以及短TTI个数。其他数值或者K的含义与上相同。
针对上述方式二，若eNB和UE确定了下行TTI长度与上行TTI长度后，则可根据预设的对应关系中的指示位置，在所述指示位置指示处的时频资源上发送所述HARQ反馈信息。
方式三：eNB和UE预设与所述TTI长度变更后的下行TTI长度与上行TTI长度之间具有对应关系的偏移量，并协商确定更新后的时频资源为：时频资源位置与TTI长度变更后下行TTI长度与上行TTI长度所对应指示位置具有设定偏移量的时频资源。
其中，时频资源位置与TTI长度变更后下行TTI长度与上行TTI长度所对应指示位置具有设定偏移量的时频资源可以理解为是在方式二的基础上再增加设定偏移量的指示位置，如表2所示：
Figure PCTCN2016094990-appb-000001
表2
其中，表2中K1、K2……K7是指偏移量，所述偏移量的取值可如表3所示：
Figure PCTCN2016094990-appb-000002
表3
可选的，本发明实施例中所述偏移量可以由eNB发送给所述UE；或者可以预置于所述UE和所述eNB上；或者可以由所述UE确定并发送给所述eNB；或者由所述UE和所述eNB共同协商。
方式四：eNB和UE预设所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度，与所述指示位置之间具有预设的对应关系。eNB和UE确定更新后的时频资源为：所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度所对应的指示位置处的时频资源。
本发明实施例中基于TTI长度变更前的下行TTI长度与上行TTI长度、以及所述TTI长度变更后的下行TTI长度与上行TTI长度，可采用合理的偏移量，设置指示位置。其中，所述偏移量是指TTI长度变更前的TTI长度位 置处映射到TTI长度变更后位置处的偏移量。其中，TTI长度变更前的下行TTI长度与上行TTI长度、以及所述TTI长度变更后的下行TTI长度与上行TTI长度对应的偏移量可如下表4所示：
Figure PCTCN2016094990-appb-000003
表4
可选的，表4中偏移量的具体数值可以如表5所示：
Figure PCTCN2016094990-appb-000004
表5
方式五：更新后的时频资源可为：TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
本发明实施例中，若TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的时频资源为多个，例如图9所示的情况，则可在映射出的多个时频资源中选择一个。
可选的，在至少两个时频资源中确定的一个时频资源可以为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述eNB在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ反馈信息的时频资源起始位置之后的时频资源。
其中，本发明实施例中可采用对TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的时频资源中的时域符号的标号的取整运算，以在所述至少两个时频资源中确定时频资源起始位置在所述TTI长度变更前发送所述HARQ反馈信息的时频资源起始位置之后的时频资源。例如TTI长度变更前发送所述HARQ反馈信息的时域符号的标号为20，TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的时频资源中的时域符号的标号为19、23，则19和23对20取整运算后，可确定标号为23的时域符号对应的时频资源是时频资源起始位置在所述TTI长度变更前发送所述HARQ反馈信息的时频资源起始位置之后的时频资源。
方式六：若在更新后的所述时频资源上发送的HARQ反馈消息为至少两个HARQ反馈消息，所述至少两个HARQ反馈消息可采用如下方式发送：
所述至少两个HARQ反馈消息通过绑定方式或者复用方式发送；或者所述至少两个HARQ反馈消息中携带有隐式HARQ标识信息或者显式HARQ标识信息；或者所述至少两个HARQ反馈消息为所述eNB预先约定的需要发送的HARQ反馈消息；或者所述至少两个HARQ反馈消息为所用TB的大小与当前TTI长度匹配的HARQ反馈消息；或者所述至少两个HARQ反馈消息为所述UE选择的HARQ反馈消息；或者所述至少两个HARQ反馈消息为TTI长度变更前和/或TTI长度变更后的HARQ反馈消息；或者所述至少两个 HARQ反馈消息为按照预设优先级顺序选择的HARQ反馈消息。
其中，至少两个HARQ反馈消息通过绑定方式或者复用方式在更新后的时频资源中发送的具体时域资源位置可以是在更新后的时频资源中任意选择的，也可以是预定义的，还可以是eNB配置的。
可选的，本发明实施例中可采用表6的方式，确定通过绑定方式或者复用方式在更新后的时频资源中发送HARQ反馈消息的具体时域资源位置：
Figure PCTCN2016094990-appb-000005
Figure PCTCN2016094990-appb-000006
表6
其中，表6中1/2/3中的1表示任意选择，2表示预定义，3表示由eNB配置。
方式七：由eNB向UE发送更新后的时频资源位置给所述UE；或者在所述UE和所述eNB上预置所述更新后的时频资源位置；或者由所述UE确定所述更新后的时频资源位置并发送给所述eNB；或者由所述UE和所述eNB共同协商所述更新后的时频资源位置。
其中，本发明实施例中所述时频资源位置可通过RRC消息、广播消息、 MAC CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式发送。
进一步的，所述时频资源位置可以是具体的UE的时频资源位置信息，也可以是具体的小区的时频资源位置信息，还可以是UE HARQ进程的具体时频资源位置信息。
方式八：UE在更新后的所述时频资源上发送正确应答(ACK)的HARQ反馈信息，而不发送错误应答(NACK)的HARQ反馈信息。若eNB未接收到UE发送的HARQ反馈信息，则向UE发送清零指示，以将UE的HARQ进程的TB清零，或者将UE的HARQ进程清零，UE接收eNB发送的清零指示，依据所述清零指示将UE的HARQ进程的TB清零，或者将UE的HARQ进程清零。
方式九：eNB选择并发送的HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息，以使UE依据TTI长度变更后的下行TTI长度与上行TTI长度信息，确定变更后的时频资源，并在更新后的所述时频资源上发送所述eNB指示的所述HARQ标识对应的HARQ应答信息。
方式十：UE采用异步HARQ形式发送HARQ反馈信息，并在更新后的所述时频资源上发送的所述HARQ反馈信息中显式或者隐式包括HARQ标识信息。
其中，更新后的时频资源包括物理层上行控制信道(Physical Uplink Control Channel，PUCCH)或者物理层上行共享信道(Physical Uplink Share Channel，PUSCH)。其中，所述PUCCH和PUSCH包括sTTI上的PUCCH和PUSCH。
其中，HARQ标识在所述时频资源上的映射关系可满足如下公式：
HARQID＝f(nPUCCH)＝nPUCCHmode number(HARQ)；
或者
HARQID＝f(nPUSCH)＝nPUSCHmode number(HARQ)。
其中，HARQID为HARQ标识，f(nPUCCH)表示以nPUCCH为输入变量的函数，f(nPUSCH)表示以nPUSCH为输入变量的函数，nPUCCH表示PUCCH所在资源位置相关数值，nPUSCH表示PUSCH所在资源位置相关数值，mode表示取模运算，number(HARQ)表示HARQ进程个数。
本发明实施例针对DL HARQ,在TTI变更时刻，UE利用通过上述方式确定的更新后的时频资源反馈HARQ反馈消息，能够避免发送和/或接收数据包的时频资源位置在TTI长度变更前后发生更迭，进而避免数据包的错发和错收。
图10为本发明实施例提供的第五种通信方法，如图10所示，包括：
S501：eNB确定通信链路上TTI长度发生变更。
S502：eNB将TTI长度变更信息发送给UE。
S503：eNB基于TTI长度变更前的HARQ的TB，发送新传TB或者重传TB。
S504：获取所述eNB发送的新传TB或者重传TB，并停止发送HARQ反馈信息。
S505：UE基于所述新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息。
本发明实施例中eNB向UE发送新传TB或者重传TB，UE基于所述新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息，在TTI长度变更后的TB信息继续进行通信，能够免发送和/或接收数据包的时频资源位置在TTI长度变更前后发生更迭，进而避免数据包的错发和错收。
针对UL HARQ过程，UE需要向eNB发送数据包的过程主要涉及UE接收eNB发送的上行授权(UL grant)，准备发送PUSCH以及UE准备重传TB两个过程。
本发明实施例以下将针对上述两个过程，在TTI长度发生变更的过程中， 避免数据包错发和错收的实施过程进行说明。
一种实施方式中，eNB和UE确定TTI长度发生变更的情况下，eNB向UE发送用于指示UE发送和/或接收数据的通信链路上的TTI长度发生变更的TTI长度变更指令。UE根据接收到网络设备发送的用于指示UE发送和/或接收数据的通信链路上的TTI长度发生变更的TTI长度变更指令以及接收到上行授权的时间，进行相应的处理。其中，若所述UE接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之后，或者所述UE同时接收到所述上行授权和所述TTI长度变更指令，则所述UE依据所述上行授权，在所述TTI长度发生变更的通信链路上发送数据。若所述UE接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之前，则所述UE丢弃所述上行授权对应的时频资源。
另一种实施方式中，eNB和UE确定TTI长度发生变更的情况下，eNB向UE发送用于指示UE发送和/或接收数据的通信链路上的TTI长度发生变更的TTI长度变更指令，UE接收所述TTI长度变更指令并接收所述网络设备发送的、用于指示上行授权有效与否的指示信息，若所述上行授权有效，则利用所述上行授权在所述TTI长度发生变更的通信链路上发送数据。若所述上行授权无效，则丢弃所述上行授权对应的时频资源。
再一种实施方式中，eNB和UE确定TTI长度发生变更的情况下，eNB可向UE发送物理层信息，通过所述物理层信息指示UE依据上行授权发送数据，或者依据长度变更后TTI发送数据。所述UE接收所述网络设备发送的物理层信息，按照所述物理层信息，依据上行授权发送数据，或者依据长度变更后TTI发送数据。
又一种实施方式中，eNB和UE确定TTI长度发生变更的情况下，eNB可向UE重新发送上行授权，所述UE接收网络设备重新发送的上行授权，并依据所述重新发送的上行授权，在TTI长度变更后的通信链路上发送数据。
本发明实施例上述几种实施方式中，UE利用上行授权，在所述TTI长度发生变更的通信链路上发送的数据，可以是携带有HARQ标识的TB数据。
本发明实施例中UE利用上行授权，在所述TTI长度发生变更的通信链路上发送的数据，若发送数据的时频资源位置有多个，则可参阅上述实施例中涉及的方式五的方式进行处理。若发送的数据有多个，则可参阅上述实施例中涉及的方式六的方式进行处理。本发明实施例在此不再赘述。
本发明实施例通过上述几种可能的实施方式，能够避免UL HARQ过程中，TTI长度发生变更造成的数据包错发。
针对UL HARQ过程中，eNB向UE发送HARQ反馈信息时，由于当前标准选择了物理混合自动请求重传指示信道(Physical HARQ Indication Channel，PHICH)减少的异步的UL HARQ，因此，若TTI长度由低于1ms的短TTI变更为1msTTI，UE从监听物理下行控制信道(Physical Downlink Control Channel，PDCCH)和短物理下行控制信道(Short Physical Downlink Control Channel，PDCCH)转为监听PHICH信道，UE监听每个PHICH，有可能两个sTTI使用了相同的资源分配(Resource Allocation，RA)发送TB，而PHICH是根据UE发送的RA决定HARQ反馈对应的UE信息的，导致PHICH发送HARQ反馈消息时发生冲突，进而使得UE不能确定具体接收到的是哪个进程的HARQ。本发明实施例中所述发生冲突是指低于1ms的短TTI配置时，至少两个TTI在接收网络侧的数据时，在相同的频域资源获得TB，导致UE需要在TTI变更后的1msTTI的eNB的PHICH的同一个位置接收两个TTI的HARQ反馈消息。
本发明实施例中，为使UE能够确定具体接收到的是哪个进程的HARQ，可采用如下方式：
一种实施方式中，eNB发送对接收到的数据进行HARQ反馈的HARQ标识或者对接收到的数据进行HARQ反馈的数据标识，UE接收eNB发送的、对所述数据进行HARQ反馈的HARQ标识或者对所述数据进行HARQ反馈的数据标识，依据所述HARQ反馈的HARQ标识或者数据标识，能够确定出具体的HARQ。
另一种实施方式中，网络设备发送指示信息，所述指示信息用于指示是 否对接收到的数据进行HARQ反馈的HARQ标识或者用于指示是否对接收到的数据进行HARQ反馈的数据标识。所述UE接收网络设备发送的指示信息，根据所述指示信息能够确定对应所述HARQ标识或数据标识的数据是否存在HARQ反馈，进而可确定具体的HARQ。
上述两种实施方式中，所述HARQ标识或所述数据标识可通过DCI发送和接收，所述HARQ标识或所述数据标识还可与PHICH的位置信息关联。
又一种实施方式中，所述网络设备可发送对所述数据进行HARQ反馈的HARQ反馈信息中发生冲突的第一个HARQ的反馈信息或者高优先级的HARQ的反馈，进而避免发生HARQ冲突。
本发明实施例中，所述UE可通过传输HARQ标识和/或HARQ反馈信息相关联的TB的时频资源，获取传输所述HARQ反馈信息的时频资源。可选的，UE将HARQ标识与HARQ反馈信息的时频资源进行映射，UE在HARQ标识对应的HARQ反馈信息的时频资源处获取HARQ反馈信息。或者，可选的，UE在使用HARQ反馈信息对应的TB时频资源时，就在TB时频资源处向eNB隐含指示了它需要的后续接收HARQ反馈的时频资源位置，eNB获得UE发送的TB时，就会在对应的位置发送HARQ反馈信息。其中，所述时频资源中可包括低于1ms的短TTI的时间信息。UE依据获取的时频资源传输所述HARQ反馈信息。其中，UE可以变更后TTI为基准，执行同步HARQ。
上述主要从网络设备和终端交互的角度对本发明实施例提供的方案进行了介绍。可以理解的是，网络设备、终端为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。结合本发明中所公开的实施例描述的各示例的单元及算法步骤，本发明实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同的方法来实现所描述的功能，但是这种实现不应认为超出本发明实施例的技术方案的范围。
本发明实施例可以根据上述方法示例对网络设备和终端进行功能单元的 划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本发明实施例中对单元的划分是示意性的，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。
在采用集成的单元的情况下，图11示出了本发明实施例提供的一种可能的网络设备100的结构示意图。该网络设备100具有实现上述第一种通信方法和第二种通信方法中网络设备100行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
图11中，所述网络设备100包括处理单元101和发送单元102，所述处理单元101，用于确定通信链路上的传输时间间隔TTI长度发生变更，并确定指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与终端进行通信。所述发送单元102，用于向终端发送所述处理单元101确定的指示信息。
可选的，若所述指示信息用于指示将至少一个HARQ进程的TB清零，则所述处理单元101还用于：在所述发送单元102向终端发送指示信息之前，确定所述TTI长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
可选的，所述处理单元101，具体用于按如下方式指示将至少一个HARQ的TB清零：将一个终端的至少一个HARQ进程的TB清零；或者将一组终端的至少一个HARQ进程的TB清零；或者将小区的至少一个HARQ进程的TB清零。
其中，所述至少一个HARQ进程为全部HARQ进程，或者指定的HARQ进程。所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
其中，所述处理单元101，具体用于按如下方式指示在变更后的TTI长度 所在的频域资源上与终端进行通信：指示丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与终端进行通信，所述数据为TTI长度变更前的HARQ进程的TB上的数据。
可选的，若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，所述处理单元101，还用于：在所述发送单元102向终端发送指示信息之后获取所述终端发送的数据。所述发送单元102，还用于在下行链路上依据变更后的TTI长度发送HARQ反馈信息。
若所述HARQ反馈信息为错误应答指令NACK，所述发送单元102，还用于：向所述终端发送上行授权信息。
可选的，所述发送单元102向终端发送指示信息之后，还用于：发送所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。
可选的，所述发送单元102通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述指示信息。
其中，若所述指示信息用于指示将至少一个HARQ进程的TB清零，且通过物理层信令发送，则所述发送单元102通过物理层信令所在资源隐式发送所述指示信息；或者通过在下行控制信息DCI中包含的新数据到达被翻转指示信息发送所述指示信息。若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，且通过物理层信令发送，则所述发送单元102通过下行控制信息DCI发送所述指示信息。其中，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
本发明实施例中，其中，网络设备100的处理单元101可以是处理器或控制器。网络设备100的发送单元102可以是通信接口、收发器、收发电路等，其中，通信接口是统称，可以包括一个或多个接口。
当处理单元101是处理器，发送单元102是收发器时，本发明实施例提供的网络设备可具有如图12所示的结构。
图12示出了本发明实施例网络设备100的另一种可能的结构示意图，如图12所示，网络设备100包括处理器1001和收发器1002，所述处理器1001被配置为支持网络设备执行上述方法中相应的功能，所述收发器1002被配置为支持用于支持网络设备与终端或其他网络实体之间的通信。进一步的，所述网络设备还可以包括存储器1003，所述存储器1003用于与处理器1001耦合，其保存网络设备100必要的程序指令和数据。
其中，所述网络设备可以为基站设备。
在采用集成的单元的情况下，图13示出了本发明实施例提供的一种可能的终端200的结构示意图。该终端200具有实现上述第一种通信方法和第二种通信方法中终端200行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
图13中，所述终端200包括接收单元201和处理单元202。所述接收单元201，用于接收网络设备在确定通信链路上的传输时间间隔TTI长度发生变更情况下所发送的指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与网络设备进行通信。所述处理单元202，用于依据所述指示信息，将所述终端200的至少一个HARQ进程的传输块TB清零，或者在变更后的TTI长度所在的频域资源上与网络设备进行通信。
可选的，若所述指示信息用于指示将至少一个HARQ进程的TB清零，则在所述接收单元201接收指示信息之前，所述处理单元202，还用于：确定所述TTI长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
其中，所述指示信息指示的将至少一个HARQ的TB清零，包括：将一个终端200的至少一个HARQ进程的TB清零；或者将一组终端200的至少一个HARQ进程的TB清零；或者将小区具体的至少一个HARQ进程的TB清零。
其中，所述指示信息指示的所述至少一个HARQ进程为全部HARQ进程， 或者指定的HARQ进程。所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
其中，所述处理单元202，具体采用如下方式依据所述指示信息在变更后的TTI长度所在的频域资源上与网络设备进行通信：丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与网络设备进行通信，其中，与网络设备进行通信的数据为TTI长度变更前的HARQ进程的TB上的数据。
可选的，所述接收单元201，还用于：在所述处理单元202依据所述指示信息在变更后的TTI长度所在的频域资源上发送数据之后，接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息。
若所述HARQ反馈信息为错误应答指令NACK，则所述接收单元201，还用于接收网络设备发送的上行授权信息。
其中，所述接收单元201，具体采用如下方式接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息：接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。
所述接收单元201接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息之后，所述处理单元202还用于：依据所述HARQ反馈信息的HARQ标识信息和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
所述接收单元201接收所述网络设备发送的上行授权信息对应的HARQ标识信息之后，所述处理单元202还用于：依据所述上行授权信息对应的HARQ标识信息，和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
其中，所述处理单元202，具体采用如下方式进行HARQ处理：若所述HARQ进程为至少两个HARQ进程，则对所述至少两个HARQ进程合并处理。
其中，所述接收单元201通过无线资源控制RRC消息、广播消息、媒体 接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式接收所述指示信息。若所述指示信息用于指示将至少一个HARQ进程的TB清零，且通过物理层信令接收，则所述接收单元201通过物理层信令所在资源隐式接收所述指示信息；或者通过在下行控制信息DCI中包含的新数据到达被翻转指示信息接收所述指示信息。若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与网络设备进行通信，且通过物理层信令接收，则所述接收单元201通过下行控制信息DCI接收所述指示信息。其中，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
可选的，终端200的处理单元202可以是处理器，接收单元201可以是接收器。
当终端200的处理单元202是处理器，接收单元201是接收器时，本发明实施例所涉及的终端200可以为图14所示的终端200。
图14示出了本发明实施例一种可能的终端200。如图14所示，终端200包括处理器2001和接收器2002。所述终端200还可以包括处存储器2003，所述存储器2003用于与处理器2001耦合，其保存终端200必要的程序指令和数据。进一步的，所述终端200还可以包括天线2004。
在采用集成的单元的情况下，图15示出了本发明实施例提供的一种可能的网络设备300的结构示意图。该网络设备300具有实现上述第三种通信方法中网络设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
一种可能的设计中，所述网络设备300处理单元301和发送单元302，其中，所述处理单元301，用于确定通信链路上的传输时间间隔TTI长度发生变更，并生成用于指示终端按照所述TTI长度变更的生效时间，在所述通信链路上依据变更后的TTI长度通信的指示信息。所述发送单元302，用于向终端发送所述指示信息。
其中，所述生效时间为用于指示终端在所述通信链路上使用所述长度变更后的所述TTI的起始时间；或者所述生效时间是以终端接收到生效时间信息为开始的偏移值所表示的；或者所述生效时间是以终端接收到生效时间信息为开始的定时时间所表示的。
其中，所述处理单元301还用于在所述终端上预先配置所述生效时间预先配置于终端。所述发送单元302还用于向所述终端发送所述生效时间。
可选的，所述发送单元302，还用于发送激活指示信息，所述激活指示信息用于激活所述生效时间。
可选的，若所述生效时间为至少两个生效时间，则所述处理单元301还用于还用于在所述至少两个生效时间中选择一个生效时间。所述发送单元302还用于将所述选择的生效时间发送和/或指示给所述终端。或者所述处理单元301指示所述终端在所述至少两个生效时间中选择一个生效时间。
所述处理单元301，还用于指示所述终端按照选择的生效时间，在所述通信链路上依据变更后的TTI长度发送和/或接收数据。
可选的，所述发送单元302可通过无线资源控制RRC消息、广播消息、媒体接入层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述生效时间和/或所述激活信息。若所述生效时间和/或所述激活信息通过物理层信令发送，则所述激活指示信息是在下行控制信息DCI中所发送的；或者所述激活指示信息是利用DCI的时频资源隐式发送的；或者所述激活指示信息是利用DCI的加扰扰码隐式发送的。
所述生效时间是利用DCI的时频资源隐式发送的情况下，所述生效时间在所述DCI的时频资源位置满足公式：n＝nrumod N；或者满足公式：n＝(nru+m)mod N；其中，所述nru是用于终端下行控制信息所在的第一个无线单元的索引值，N用于表示可选的生存时间的数目，n为选择的生存时间的顺序号，m为网络侧分配的固定数值，mod()表示求余运算。
可选的，所述生效时间为针对一个终端的生效时间，或者为针对小区的 生效时间，或者为针对一组终端的生效时间。
本发明实施例中，网络设备300的处理单元301可以是处理器或控制器。网络设备300的发送单元302可以是通信接口、收发器、收发电路等，其中，通信接口是统称，可以包括一个或多个接口。
当所述网络设备300包括的处理单元301是处理器，发送单元302是收发器时，本发明实施例提供的网络设备300可具有如图16所示的结构。
图16示出了本发明实施例网络设备300的另一种可能的结构示意图，如图16所示，网络设备300包括处理器3001和收发器3002。所述处理器3001被配置为支持网络设备300执行上述方法中相应的功能，所述收发器3002被配置为支持用于支持网络设备300与终端或其他网络实体之间的通信。进一步的，所述网络设备300还可以包括存储器3003，所述存储器3003用于与处理器3001耦合，其保存网络设备300必要的程序指令和数据。
其中，所述网络设备300可以为基站设备。
在采用集成的单元的情况下，图17示出了本发明实施例提供的一种可能的终端400的结构示意图。该终端400具有实现上述第三种通信方法中终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
图17中，所述终端400包括处理单元401和通信单元402，其中，所述处理单元401，用于确定TTI长度变更的生效时间，并按照所述TTI长度变更的生效时间，通过所述发送单元在所述通信链路上依据变更后的TTI长度进行通信。
其中，所述生效时间为用于指示终端400在所述通信链路上使用所述长度变更后的所述TTI的起始时间；或者所述生效时间是以终端400接收到生效时间信息为开始的偏移值所表示的；或者所述生效时间是以终端400接收到生效时间信息为开始的定时时间所表示的。
其中，所述生效时间预先配置于所述终端400上或由网络设备发送给所述终端400。若所述生效时间由所述网络设备发送给所述终端400，则所述通 信单元402还用于接收所述生效时间。
所述通信单元402，还用于接收网络设备发送的激活指示信息，所述激活指示信息用于激活所述生效时间。
若所述生效时间为至少两个生效时间，则所述通信单元402用于在所述至少两个生效时间中选择的一个生效时间，在所述通信链路上依据变更后的TTI长度通信。其中，在所述至少两个生效时间中选择的一个生效时间是所述终端400在所述至少两个生效时间中选择的一个生效时间，或者所述网络设备在所述至少两个生效时间中选择一个生效时间，并将所述选择的生效时间发送和/或指示给所述终端400的一个生效时间。
可选的，所述生效时间和/或所述激活信息是所述通信单元402通过无线资源控制RRC消息、广播消息、媒体接入层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式接收的。若所述生效时间和/或所述激活信息通过物理层信令接收，则所述激活指示信息是在下行控制信息DCI中所接收的；或者所述激活指示信息是利用DCI的时频资源隐式接收的；或者所述激活指示信息是利用DCI的加扰扰码隐式接收的。在所述生效时间是利用DCI的时频资源隐式接收的情况下，所述生效时间在所述DCI的时频资源位置满足公式：n＝nrumod N；或者满足公式：n＝(nru+m)mod N；其中，所述nru是用于终端400下行控制信息所在的第一个无线单元的索引值，N用于表示可选的生存时间的数目，n为选择的生存时间的顺序号，m为网络侧分配的固定数值，mod()表示求余运算。
可选的，所述生效时间为针对一个终端400的生效时间，或者为针对小区的生效时间，或者为针对一组终端400的生效时间。
可选的，终端400的的处理单元401可以是处理器，通信单元402可以是接收器/发射器。
当终端400的的处理单元401是处理器，通信单元402是接收器/发射器时，本发明实施例所涉及的终端400可以为图18所示的终端400。
图18示出了本发明实施例一种可能的终端400。如图18所示，终端400包括处理器4001和接收器/发射器4002。所述终端400还可以包括存储器4003，所述存储器4003用于与处理器4001耦合，其保存终端400必要的程序指令和数据。
进一步的，所述终端400还可以包括天线4004。
在采用集成的单元的情况下，图19示出了本发明实施例提供的一种可能的网络设备500的结构示意图。该网络设备500具有实现上述第四种通信方法和第五种通信方法中网络设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
图19中，所述网络设备500包括处理单元501和发送单元502，其中，所述处理单元501用于确定通信链路上传输时间间隔TTI长度发生变更，并指示终端依据所述TTI长度变更信息，在所述通信链路上更新发送混合自动重传请求HARQ反馈信息的时频资源，并在更新后的所述时频资源上发送所述HARQ反馈信息。或者指示终端停止发送HARQ反馈信息，并基于所述新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息；其中，所述新传TB或者所述重传TB是所述网络设备500基于TTI长度变更前的HARQ的TB所接收的。所述发送单元502用于发送TTI长度变更信息或发送新传传输块TB或者重传TB。
所述处理单元501，还用于在所述发送单元502发送TTI长度变更信息之前，确定原本发送HARQ反馈信息的时间，在所述TTI长度变更时间之后。
可选的，更新后的时频资源为：在所述TTI长度变更后的通信链路上、时频资源位置与所述TTI长度变更前发送所述HARQ反馈信息的时频资源的TTI的起始位置时间最接近、且在所述时频资源起始时间位置处或者在所述时频资源时间起始位置之后的时频资源。
可选的，更新后的时频资源为：所述TTI长度变更后的下行TTI长度与上行TTI长度所对应指示位置处的时频资源；其中，所述TTI长度变更后的 下行TTI长度与上行TTI长度与所述指示位置之间具有预设的对应关系。
所述处理单元501，还用于指示终端在所述通信链路上更新发送HARQ反馈信息的时频资源之后，丢弃TTI长度变更生效之前的HARQ反馈信息。
可选的，更新后的时频资源为：时频资源位置与TTI长度变更后下行TTI长度与上行TTI长度所对应指示位置具有设定偏移量的时频资源；所述偏移量与所述TTI长度变更后的下行TTI长度与上行TTI长度之间具有对应关系。
其中，所述偏移量由网络设备500发送给所述终端；或者所述偏移量预置于所述终端和所述网络设备500上；或者所述偏移量由所述终端确定并发送给所述网络设备500；或者所述偏移量由所述终端和所述网络设备500共同协商。
可选的，更新后的时频资源为：所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度所对应的指示位置处的时频资源；其中，所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度，与所述指示位置之间具有预设的对应关系。
可选的，更新后的时频资源为：TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
其中，至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备500在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ反馈信息的时频资源起始位置之后的时频资源。
所述发送单元502，采用如下方式在更新后的所述时频资源上发送所述HARQ反馈信息：在更新后的所述时频资源上发送至少两个HARQ反馈消息。
所述发送单元502，用于将所述至少两个HARQ反馈消息通过绑定方式或者复用方式发送；或者将所述至少两个HARQ反馈消息中携带有隐式 HARQ标识信息或者显式HARQ标识信息；或者将所述至少两个HARQ反馈消息为所述网络设备500预先约定的需要发送的HARQ反馈消息；或者将所述至少两个HARQ反馈消息为所用传输块TB的大小与当前TTI长度匹配的HARQ反馈消息。
其中，所述发送单元502发送的所述至少两个HARQ反馈消息可为所述终端选择的HARQ反馈消息；或者所述发送单元502发送的所述至少两个HARQ反馈消息为TTI长度变更前和/或TTI长度变更后的HARQ反馈消息；或者所述发送单元502发送的所述至少两个HARQ反馈消息为按照预设优先级顺序选择的HARQ反馈消息。
可选的，所述更新后的时频资源位置是由所述网络设备500发送给所述终端的；或者所述更新后的时频资源位置预置于所述终端和所述网络设备500上；或者所述更新后的时频资源位置由所述终端确定并发送给所述网络设备500；或者所述更新后的时频资源位置由所述终端和所述网络设备500共同协商。
可选的，所述处理单元501还用于确定未接收到所述终端发送的错误应答指令NACK信息。所述发送单元502，还用于发送清零指示，所述清零指示用于指示将终端的HARQ进程的TB清零，或者将终端的HARQ进程清零。
可选的，所述处理单元501还用于选择HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息，所述发送单元502还用于选择并发送的HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息为所述网络设备500指示的HARQ标识对应的HARQ反馈信息。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息中显式或者隐式包括HARQ标识信息。
其中，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，所述发送单元502通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述TTI长度变更信息。
其中，所述TTI长度变更信息为一个终端的至少一个HARQ进程的TTI长度变更信息、一组终端的至少一个HARQ进程的TTI长度变更信息或者小区的至少一个HARQ进程的TTI长度变更信息。
可选的，所述TTI长度变更消息可包含于更新后的所述时频资源内。
本发明实施例中，网络设备500的处理单元501可以是处理器或控制器。网络设备500的发送单元502可以是通信接口、收发器、收发电路等，其中，通信接口是统称，可以包括一个或多个接口。
当所述网络设备500包括的处理单元501是处理器，发送单元502是收发器时，本发明实施例提供的网络设备500可具有如图20所示的结构。
图20示出了本发明实施例网络设备500的另一种可能的结构示意图，如图20所示，网络设备500包括处理器5001和收发器5002。所述处理器5001被配置为支持网络设备500执行上述方法中相应的功能，所述收发器5002被配置为支持用于支持网络设备500与终端或其他网络实体之间的通信。进一步的，所述网络设备500还可以包括存储器5003，所述存储器5003用于与处理器5001耦合，其保存网络设备500必要的程序指令和数据。
其中，所述网络设备500可以为基站设备。
在采用集成的单元的情况下，图21示出了本发明实施例提供的一种可能的终端600的结构示意图。该终端600具有实现上述第四种通信方法和第五种通信方法中终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
一种可能的设计中，所述终端600包括接收单元601、处理单元602和发送单元603。所述接收单元601用于接收网络设备发送的通信链路上传输时间间隔TTI长度变更信息。所述处理单元602用于依据所述接收单元601接收的所述 TTI长度变更信息，在所述通信链路上更新发送混合自动重传请求HARQ反馈信息的时频资源。所述发送单元603用于在所述处理单元602更新后的所述时频资源上发送所述HARQ反馈信息。或者
所述接收单元601，用于获取所述网络设备发送的新传传输块TB或者重传TB。所述处理单元602用于停止发送HARQ反馈信息，并基于所述接收单元601接收的所述新传TB或者重传TB、以及TTI长度变更前的TB，进行联合解码获得TTI长度变更后的TB信息。所述发送单元603用于基于TTI长度变更前的HARQ的TB发送新传TB或者所述重传TB。
所述处理单元602，还用于依据所述TTI长度变更信息，在所述通信链路上更新发送HARQ反馈信息的时频资源之前，确定原本发送HARQ反馈信息的时间，在所述TTI长度变更时间之后。
可选的，更新后的时频资源为：在所述TTI长度变更后的通信链路上、时频资源位置与所述TTI长度变更前发送所述HARQ反馈信息的时频资源的TTI的起始位置时间最接近、且在所述时频资源起始时间位置处或者在所述时频资源时间起始位置之后的时频资源。
可选的，更新后的时频资源为：所述TTI长度变更后的下行TTI长度与上行TTI长度所对应指示位置处的时频资源。其中，所述TTI长度变更后的下行TTI长度与上行TTI长度与所述指示位置之间具有预设的对应关系。
所述处理单元602，还用于在所述通信链路上更新发送HARQ反馈信息的时频资源之后，丢弃TTI长度变更生效之前的HARQ反馈信息。
可选的，更新后的时频资源为：时频资源位置与TTI长度变更后下行TTI长度与上行TTI长度所对应指示位置具有设定偏移量的时频资源；所述偏移量与所述TTI长度变更后的下行TTI长度与上行TTI长度之间具有对应关系。
其中，所述偏移量由网络设备发送给所述终端600；或者所述偏移量预置于所述终端600和所述网络设备上；或者所述偏移量由所述终端600确定并发送给所述网络设备；或者所述偏移量由所述终端600和所述网络设备共同协商。
可选的，更新后的时频资源为：所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度所对应的指示位置处的时频资源；其中，所述TTI长度变更前的下行TTI长度与上行TTI长度、所述TTI长度变更后的下行TTI长度与上行TTI长度，与所述指示位置之间具有预设的对应关系。
可选的，更新后的时频资源为：TTI长度变更前发送所述HARQ反馈信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
其中，至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ反馈信息的时频资源起始位置之后的时频资源。
所述发送单元603，具体采用如下方式在更新后的所述时频资源上发送所述HARQ反馈信息：在更新后的所述时频资源上发送至少两个HARQ反馈消息。
其中，所述至少两个HARQ反馈消息通过绑定方式或者复用方式发送；或者所述至少两个HARQ反馈消息中携带有隐式HARQ标识信息或者显式HARQ标识信息；或者所述至少两个HARQ反馈消息为所述网络设备预先约定的需要发送的HARQ反馈消息；或者所述至少两个HARQ反馈消息为所用传输块TB的大小与当前TTI长度匹配的HARQ反馈消息；所述至少两个HARQ反馈消息为所述终端600选择的HARQ反馈消息；所述至少两个HARQ反馈消息为TTI长度变更前和/或TTI长度变更后的HARQ反馈消息；所述至少两个HARQ反馈消息为按照预设优先级顺序选择的HARQ反馈消息。
可选的，所述更新后的时频资源位置是由所述网络设备发送给所述终端600的；或者所述更新后的时频资源位置预置于所述终端600和所述网络设备上；或者所述更新后的时频资源位置由所述终端600确定并发送给所述网络 设备；或者所述更新后的时频资源位置由所述终端600和所述网络设备共同协商。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息为正确HARQ反馈信息。
可选的，所述接收单元601，还用于接收网络设备发送的清零指示，所述清零指示用于指示将终端600的HARQ进程的TB清零，或者将终端600的HARQ进程清零。
所述发送单元603，还用于停止发送错误应答指令NACK信息。
可选的，在更新后的所述时频资源上发送所述HARQ应答信息之前，所述接收单元601还用于接收所述网络设备选择并发送的HARQ标识，以及TTI长度变更后的下行TTI长度与上行TTI长度信息。
其中，在更新后的所述时频资源上发送的所述HARQ反馈信息为所述网络设备指示的HARQ标识对应的HARQ反馈信息。
可选的，在更新后的所述时频资源上发送的所述HARQ反馈信息中可显式或者隐式包括HARQ标识信息。
其中，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，所述接收单元601通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式接收所述TTI长度变更信息。
其中，所述TTI长度变更信息可为一个终端600的至少一个HARQ进程的TTI长度变更信息、一组终端600的至少一个HARQ进程的TTI长度变更信息或者小区的至少一个HARQ进程的TTI长度变更信息。
可选的，所述TTI长度变更消息可包含于所述更新后的所述时频资源内。
可选的，终端600的的处理单元602可以是处理器，接收单元601可以是接收器，发送单元603可以是发射器。
当终端600的的处理单元602是处理器，接收单元601是接收器，发送单元603是发射器时，本发明实施例所涉及的终端600可以为图22所示的终端600。
图22示出了本发明实施例一种可能的终端600。如图22所示，终端600包括处理器6001和接收器6002、发射器6003。所述终端600还可以包括存储器6004，所述存储器6004用于与处理器6001耦合，其保存终端600必要的程序指令和数据。
进一步的，所述终端600还可以包括天线6005。
在采用集成的单元的情况下，图23示出了本发明实施例提供的一种可能的网络设备700的结构示意图。该网络设备700具有实现上述第六种通信方法中网络设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
一种可能的设计中，所述网络设备700处理单元701和发送单元702，所述处理单元701用于确定通信链路上的传输时间间隔TTI长度变更，并确定用于指示终端通信链路上的TTI长度发生变更，并指示所述终端依据所述TTI长度变更指令进行通信的TTI长度变更指令。所述发送单元702用于发送TTI长度变更指令。
所述处理单元701确定通信链路上的TTI长度变更之后，所述发送单元702还用于发送用于指示上行授权有效与否的指示信息。
所述处理单元701确定通信链路上的TTI长度变更之后，所述发送单元702还用于发送物理层信息；其中，所述物理层信息用于指示依据上行授权发送数据，或者依据长度变更后TTI发送数据。
所述处理单元701确定通信链路上的TTI长度变更之后，所述发送单元702还用于重新发送上行授权。
所述处理单元701，具体采用如下方式指示所述终端依据所述TTI长度变更指令进行通信：若所述终端接收到所述上行授权的时间在接收到所述TTI 长度变更指令时间之后，或者所述终端同时接收到所述上行授权和所述TTI长度变更指令，则指示所述终端依据所述上行授权，在所述TTI长度发生变更的通信链路上进行通信。若所述终端接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之前，则指示所述终端丢弃所述上行授权对应的时频资源。
所述处理单元701，具体采用如下方式指示所述终端依据所述TTI长度变更指令进行通信：指示所述终端依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上进行通信。其中，更新后的时频资源为TTI长度变更前发送所述HARQ应答信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
其中，所述至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备700在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ应答信息的时频资源起始位置之后的时频资源。
所述处理单元701，具体采用如下方式指示所述终端依据所述TTI长度变更指令发送数据：指示所述终端依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上发送至少两个数据。
其中，所述至少两个数据通过绑定方式或者复用方式发送；或者所述至少两个数据中携带有隐式数据标识信息或者显式数据标识信息；或者所述至少两个数据为所述网络设备700预先约定的需要发送的数据；或者所述至少两个数据为所用传输块TB的大小与当前TTI长度匹配的数据；所述至少两个数据为所述终端选择的数据；所述至少两个数据为TTI长度变更前和/或TTI长度变更后的数据；所述至少两个数据为按照预设优先级顺序选择的数据。
可选的，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，若所述TTI长度变更指令指示的TTI长度由低于1ms的短TTI变更为1msTTI，且所述发送单元702在所述TTI长度变更指令生效之前发送数据、且所述接收单元在所述TTI长度变更指令生效之后接收网络设备700对所述数据进行自动重传请求HARQ反馈的反馈信息，则所述发送单元702还用于：
发送对所述数据进行HARQ反馈的HARQ标识或者对所述数据进行HARQ反馈的数据标识；或者发送指示信息，所述指示信息用于指示是否对所述数据进行HARQ反馈的HARQ标识或者用于指示是否对所述数据进行HARQ反馈的数据标识；或者发送对所述数据进行HARQ反馈的HARQ反馈信息中发生冲突的第一个HARQ的反馈信息或者高优先级的HARQ的反馈信息。
其中，所述发送单元702发送的所述HARQ标识或所述数据标识通过下行控制信息DCI发送。或者所述发送单元702发送的所述HARQ标识或所述数据标识与物理混合自动请求重传指示信道PHICH的位置信息关联。
所述处理单元701，还用于指示所述终端通过传输HARQ标识和/或HARQ反馈信息的传输块的时频资源，获取传输所述HARQ反馈信息的时频资源。其中，所述时频资源中包括低于1ms的短TTI的时间信息。
所述处理单元701，还用于指示所述终端获取HARQ反馈信息之后，以变更后TTI为基准，执行同步HARQ。
本发明实施例中，网络设备700的处理单元701可以是处理器或控制器。网络设备700的发送单元702可以是通信接口、收发器、收发电路等，其中，通信接口是统称，可以包括一个或多个接口。
当所述网络设备700包括的处理单元701是处理器，发送单元702是收发器时，本发明实施例提供的网络设备700可具有如图23所示的结构。
图24示出了本发明实施例网络设备700的另一种可能的结构示意图，如图24所示，网络设备700包括处理器7001和收发器7002。所述处理器7001被配置为支持网络设备700执行上述方法中相应的功能，所述收发器7002被 配置为支持用于支持网络设备700与终端或其他网络实体之间的通信。进一步的，所述网络设备700还可以包括存储器7003，所述存储器7003用于与处理器7001耦合，其保存网络设备700必要的程序指令和数据。
其中，所述网络设备700可以为基站设备。
在采用集成的单元的情况下，图25示出了本发明实施例提供的一种可能的终端800的结构示意图。该终端800具有实现上述第六种通信方法中终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
图25中，所述终端800包括接收单元801和发送单元802。其中，所述接收单元801，用于接收网络设备发送的传输时间间隔TTI长度变更指令，所述TTI长度变更指令用于指示终端800发送和/或接收数据的通信链路上的TTI长度发生变更。所述发送单元802用于依据所述TTI长度变更指令发送数据。
可选的，所述发送单元802，采用如下方式依据所述TTI长度变更指令发送数据：若所述接收单元801接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之后，或者所述接收单元801同时接收到所述上行授权和所述TTI长度变更指令，则所述发送单元802依据所述上行授权，在所述TTI长度发生变更的通信链路上发送数据。若所述接收单元801接收到所述上行授权的时间在接收到所述TTI长度变更指令时间之前，则所述发送单元802丢弃所述上行授权对应的时频资源。
所述接收单元801还用于，在所述发送单元802依据所述TTI长度变更指令发送数据之前，接收所述网络设备发送的、用于指示上行授权有效与否的指示信息。
所述发送单元802，还用于在UL授权资源上发送携带有混合自动重传请求HARQ标识的TB数据。
所述接收单元801，还用于在所述发送单元802依据所述TTI长度变更指令发送数据之前，接收所述网络设备发送的物理层信息；其中，所述物理层信息用于指示依据上行授权发送数据，或者依据长度变更后TTI发送数据。
所述接收单元801，还用于在所述发送单元802依据所述TTI长度变更指令发送数据之前，接收网络设备重新发送的上行授权。
所述发送单元802，具体采用如下方式依据所述TTI长度变更指令发送数据：
依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上发送数据。其中，更新后的时频资源为TTI长度变更前发送所述HARQ应答信息的时频资源在TTI长度变更后的通信链路上映射出的至少两个时频资源中的一个时频资源。
其中，所述至少两个时频资源中的一个时频资源为：所述至少两个时频资源中的任意一个时频资源；或者所述至少两个时频资源中时域位置最靠前的时频资源；或者所述网络设备在所述至少两个时频资源中指定的一个时频资源；或者所述至少两个时频资源中时频资源起始位置在所述TTI长度变更前发送所述HARQ应答信息的时频资源起始位置之后的时频资源。
所述发送单元802，具体采用如下方式依据所述TTI长度变更指令发送数据：
依据所述TTI长度变更指令确定更新后的时频资源，并在更新后的时频资源上发送至少两个数据。其中，所述至少两个数据通过绑定方式或者复用方式发送；或者所述至少两个数据中携带有隐式数据标识信息或者显式数据标识信息；或者所述至少两个数据为所述网络设备预先约定的需要发送的数据；或者所述至少两个数据为所用传输块TB的大小与当前TTI长度匹配的数据；所述至少两个数据为所述终端800选择的数据；所述至少两个数据为TTI长度变更前和/或TTI长度变更后的数据；或者所述至少两个数据为按照预设优先级顺序选择的数据。
可选的，所述TTI长度变更，包括：TTI长度在1ms内变更；或者TTI长度在低于1ms的短TTI和1msTTI之间变更；TTI长度在低于1ms的短TTI内变更。
可选的，若所述TTI长度变更指令指示的TTI长度由低于1ms的短TTI 变更为1msTTI，且所述发送单元802在所述TTI长度变更指令生效之前发送数据、且所述接收单元801在所述TTI长度变更指令生效之后接收网络设备对所述数据进行自动重传请求HARQ反馈的反馈信息，则所述接收单元801，还用于：
接收网络设备发送的、对所述数据进行HARQ反馈的HARQ标识或者对所述数据进行HARQ反馈的数据标识；或者接收网络设备发送的指示信息，所述指示信息用于指示是否对所述数据进行HARQ反馈的HARQ标识或者用于指示是否对所述数据进行HARQ反馈的数据标识；或者接收网络设备发送的、对所述数据进行HARQ反馈的HARQ反馈信息中发生冲突的第一个HARQ的反馈信息或者高优先级的HARQ的反馈信息。
其中，所述接收单元801通过下行控制信息DCI接收所述HARQ标识或所述数据标识。
可选的，所述HARQ标识或所述数据标识与物理混合自动请求重传指示信道PHICH的位置信息关联。
可选的，所述接收单元801，还用于通过传输HARQ标识和/或HARQ反馈信息的传输块的时频资源，获取传输所述HARQ反馈信息的时频资源。其中，所述时频资源中包括低于1ms的短TTI的时间信息。
可选的，所述接收单元801获取HARQ反馈信息之后，所述发送单元802以变更后TTI为基准，执行同步HARQ。
可选的，终端800的接收单元801可以是接收器，发送单元802可以是发射器。
当终端800的接收单元801是接收器，发送单元802是发射器时，本发明实施例所涉及的终端800可以为图25所示的终端800。
图26示出了本发明实施例一种可能的终端800。如图26所示，终端800包括发射器8001和接收器8002。所述终端800还可以包括处理器8003和存储器8004，所述存储器8004用于与所述处理器8003耦合，其保存终端800必要的程序指令和数据。
进一步的，所述终端800还可以包括天线8005。
可以理解的是，本发明实施例附图中仅仅示出了网络设备和终端的简化设计。在实际应用中，网络设备和终端并不限于上述结构，例如终端还可以包括显示设备、输入输出接口等，而所有可以实现本发明实施例的终端都在本发明实施例的保护范围之内。网络设备还可以包含任意数量的发射器，接收器，处理器，控制器，存储器，通信单元等，而所有可以实现本发明实施例的网络设备都在本发明实施例的保护范围之内。
进一步可以理解的是，本发明实施例涉及的终端和终端网络设备，可用于实现本发明实施例上述方法实施例中终端和网络设备的相应功能，故对于本发明实施例描述不够详尽的地方，可参阅相关方法实施例的描述，本发明实施例在此不再赘述。
需要说明的，本发明实施例上述涉及的处理器或控制器可以是中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理器(Digital Signal Processor，DSP)，专用集成电路(Application-Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
本发明实施例上述各方面的通信方法、网络设备及终端，可以在TTI长度变更情况下，保证DL HARQ进程和UL HARQ进程中数据包的正确发送和正确接收。
本发明所有实施例同样适用于5G通信***。所述TTI可以进一步包括5G通信***中的TTI。传输时间间隔TTI长度发生变更包括5G***的TTI长度发生变更，或者TTI长度在4G***和5G***之间发生变更。所述TTI长度发生变更也可以指TTI帧内用于下行和上行的长度发生变更。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令处理器完成，所述的程序可以存储于计算机可读存储介质中，所述存储介质是非短暂性(英文：non-transitory)介质，例如随机存取存储器，只读存储器，快闪存储器，硬盘，固态硬盘，磁带(英文：magnetic tape)，软盘(英文：floppy disk)，光盘(英文：optical disc)及其任意组合。
本发明是参照本发明实施例的方法和设备各自的流程图和方框图来描述的。应理解可由计算机程序指令实现流程图和方框图中的每一流程和方框、以及流程图和方框图中的流程和方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和方框图一个方框或多个方框中指定的功能的装置。
以上所述，仅为本发明较佳的具体实施方式，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，可轻易想到的变化或替换，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该以权利要求的保护范围为准。

Claims (58)

  1. 一种网络设备，其特征在于，包括：
    处理单元，用于确定通信链路上的传输时间间隔TTI长度发生变更，并确定指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与终端进行通信；
    发送单元，用于向终端发送所述处理单元确定的指示信息。
  2. 如权利要求1所述的网络设备，其特征在于，所述处理单元，还用于：
    若所述指示信息用于指示将至少一个HARQ进程的TB清零，则在所述发送单元向终端发送指示信息之前，确定所述TTI长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
  3. 如权利要求1或2所述的网络设备，其特征在于，所述处理单元，具体用于按如下方式指示将至少一个HARQ的TB清零：
    将一个终端的至少一个HARQ进程的TB清零；或者
    将一组终端的至少一个HARQ进程的TB清零；或者
    将小区的至少一个HARQ进程的TB清零。
  4. 如权利要求1至3任一项所述的网络设备，其特征在于，所述至少一个HARQ进程为全部HARQ进程，或者指定的HARQ进程。
  5. 如权利要求4所述的网络设备，其特征在于，所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
  6. 如权利要求1所述的网络设备，其特征在于，所述处理单元，具体用于按如下方式指示在变更后的TTI长度所在的频域资源上与终端进行通信：
    指示丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与终端进行通信，所述数据为TTI长度变更前的HARQ进程的TB上的数据。
  7. 如权利要求1或6所述的网络设备，其特征在于，所述处理单元，还用于：
    若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，在所述发送单元向终端发送指示信息之后获取所述终端发送的数据；
    所述发送单元，还用于在下行链路上依据变更后的TTI长度发送HARQ反馈信息。
  8. 如权利要求7所述的网络设备，其特征在于，若所述HARQ反馈信息为错误应答指令NACK，所述发送单元，还用于：
    向所述终端发送上行授权信息。
  9. 如权利要求7或8所述的网络设备，其特征在于，所述发送单元向终端发送指示信息之后，还用于：
    发送所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。
  10. 如权利要求1至9任一项所述的网络设备，其特征在于，所述发送单元通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式发送所述指示信息。
  11. 如权利要求10所述的网络设备，其特征在于，若所述指示信息用于指示将至少一个HARQ进程的TB清零，且通过物理层信令发送，则所述发送单元通过物理层信令所在资源隐式发送所述指示信息；或者通过在下行控制信息DCI中包含的新数据到达被翻转指示信息发送所述指示信息。
  12. 如权利要求10所述的网络设备，其特征在于，若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，且通过物理层信令发送，则所述发送单元通过下行控制信息DCI发送所述指示信息。
  13. 如权利要求12所述的网络设备，其特征在于，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
  14. 一种终端，其特征在于，包括：
    接收单元，用于接收网络设备在确定通信链路上的传输时间间隔TTI长度发生变更情况下所发送的指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与网络设备进行通信；
    处理单元，用于依据所述指示信息，将所述终端的至少一个HARQ进程的传输块TB清零，或者在变更后的TTI长度所在的频域资源上与网络设备进行通信。
  15. 如权利要求14所述的终端，其特征在于，若所述指示信息用于指示将至少一个HARQ进程的TB清零，则在所述接收单元接收指示信息之前，所述处理单元，还用于：确定所述TTI长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
  16. 如权利要求14或15所述的终端，其特征在于，所述指示信息指示的将至少一个HARQ的TB清零，包括：
    将一个终端的至少一个HARQ进程的TB清零；或者
    将一组终端的至少一个HARQ进程的TB清零；或者
    将小区具体的至少一个HARQ进程的TB清零。
  17. 如权利要求14至16任一项所述的终端，其特征在于，所述指示信息指示的所述至少一个HARQ进程为全部HARQ进程，或者指定的HARQ进程。
  18. 如权利要求17所述的终端，其特征在于，所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
  19. 如权利要求14所述的终端，其特征在于，所述处理单元，具体采用如下方式依据所述指示信息在变更后的TTI长度所在的频域资源上与网络设备进行通信：
    丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与网络设备进行通信，其中，与网络设备进行通信的数据为TTI长度变 更前的HARQ进程的TB上的数据。
  20. 如权利要求14或19所述的终端，其特征在于，所述接收单元，还用于：
    在所述处理单元依据所述指示信息在变更后的TTI长度所在的频域资源上发送数据之后，接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息。
  21. 如权利要求20所述的终端，其特征在于，若所述HARQ反馈信息为错误应答指令NACK，则所述接收单元，还用于接收网络设备发送的上行授权信息。
  22. 如权利要求20或21所述的终端，其特征在于，所述接收单元，具体采用如下方式接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息：
    接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。
  23. 如权利要求22所述的终端，其特征在于，所述接收单元接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息之后，所述处理单元还用于：
    依据所述HARQ反馈信息的HARQ标识信息和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
  24. 如权利要求22或23所述的终端，其特征在于，所述接收单元接收所述网络设备发送的上行授权信息对应的HARQ标识信息之后，所述处理单元还用于：
    依据所述上行授权信息对应的HARQ标识信息，和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
  25. 如权利要求23或24所述的终端，其特征在于，所述处理单元，具体采用如下方式进行HARQ处理：
    若所述HARQ进程为至少两个HARQ进程，则对所述至少两个HARQ 进程合并处理。
  26. 如权利要求14至25任一项所述的终端，其特征在于，所述接收单元通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式或者以隐式方式接收所述指示信息。
  27. 如权利要求26所述的终端，其特征在于，若所述指示信息用于指示将至少一个HARQ进程的TB清零，且通过物理层信令接收，则所述接收单元通过物理层信令所在资源隐式接收所述指示信息；或者通过在下行控制信息DCI中包含的新数据到达被翻转指示信息接收所述指示信息。
  28. 如权利要求26所述的终端，其特征在于，若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与网络设备进行通信，且通过物理层信令接收，则所述接收单元通过下行控制信息DCI接收所述指示信息。
  29. 如权利要求28所述的终端，其特征在于，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
  30. 一种通信方法，其特征在于，包括：
    网络设备确定通信链路上的传输时间间隔TTI长度发生变更；
    所述网络设备向终端发送指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与终端进行通信。
  31. 如权利要求30所述的方法，其特征在于，若所述指示信息用于指示将至少一个HARQ进程的TB清零，则所述网络设备向终端发送指示信息之前，所述方法还包括：
    确定所述TTI长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
  32. 如权利要求30或31所述的方法，其特征在于，所述将至少一个HARQ的TB清零，包括：
    将一个终端的至少一个HARQ进程的TB清零；或者
    将一组终端的至少一个HARQ进程的TB清零；或者
    将小区的至少一个HARQ进程的TB清零。
  33. 如权利要求30至32任一项所述的方法，其特征在于，所述至少一个HARQ进程为全部HARQ进程，或者指定的HARQ进程。
  34. 如权利要求33所述的方法，其特征在于，所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
  35. 如权利要求30所述的方法，其特征在于，所述指示在变更后的TTI长度所在的频域资源上与终端进行通信，包括：
    指示丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与终端进行通信，所述数据为TTI长度变更前的HARQ进程的TB上的数据。
  36. 如权利要求30或35述的方法，其特征在于，若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，则所述网络设备向终端发送指示信息之后，所述方法还包括：
    所述网络设备获取所述终端发送的数据，并在下行链路上依据变更后的TTI长度发送HARQ反馈信息。
  37. 如权利要求36所述的方法，其特征在于，若所述HARQ反馈信息为错误应答指令NACK，则所述网络设备向所述终端发送上行授权信息。
  38. 如权利要求36或37所述的方法，其特征在于，所述网络设备向终端发送指示信息之后，所述方法还包括：
    所述网络设备发送所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。
  39. 如权利要求30至38任一项所述的方法，其特征在于，所述指示信息通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式发送或者以隐式方式发送。
  40. 如权利要求39所述的方法，其特征在于，若所述指示信息用于指示 将至少一个HARQ进程的TB清零，且通过物理层信令发送，则所述指示信息通过物理层信令所在资源隐式发送；或者
    所述指示信息通过在下行控制信息DCI中包含的新数据到达被翻转指示信息发送。
  41. 如权利要求39所述的方法，其特征在于，若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与终端进行通信，且通过物理层信令发送，则所述指示信息通过下行控制信息DCI发送。
  42. 如权利要求41所述的方法，其特征在于，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
  43. 一种通信方法，其特征在于，包括：
    终端接收网络设备在确定通信链路上的传输时间间隔TTI长度发生变更情况下所发送的指示信息，所述指示信息用于指示将至少一个混合自动重传请求HARQ进程的传输块TB清零，或者用于指示在变更后的TTI长度所在的频域资源上与网络设备进行通信；
    所述终端依据所述指示信息，将所述终端的至少一个HARQ进程的传输块TB清零，或者在变更后的TTI长度所在的频域资源上与网络设备进行通信。
  44. 如权利要求43所述的方法，其特征在于，若所述指示信息用于指示将至少一个HARQ进程的TB清零，则所述终端接收指示信息之前，所述方法还包括：
    确定所述TTI长度变更前的TB不能在TTI长度变更后的所述通信链路上传输。
  45. 如权利要求43或44所述的方法，其特征在于，所述指示信息指示的将至少一个HARQ的TB清零，包括：
    将一个终端的至少一个HARQ进程的TB清零；或者
    将一组终端的至少一个HARQ进程的TB清零；或者
    将小区具体的至少一个HARQ进程的TB清零。
  46. 如权利要求43至45任一项所述的方法，其特征在于，所述指示信 息指示的所述至少一个HARQ进程为全部HARQ进程，或者指定的HARQ进程。
  47. 如权利要求46所述的方法，其特征在于，所述指定的HARQ进程为指定HARQ标识的进程，或者为满足设定服务质量QoS需求的HARQ进程。
  48. 如权利要求43所述的方法，其特征在于，所述终端依据所述指示信息在变更后的TTI长度所在的频域资源上与网络设备进行通信，包括：
    丢弃TTI长度变更前的频域资源，并在变更后的TTI长度所在的频域资源上与网络设备进行通信，其中，与网络设备进行通信的数据为TTI长度变更前的HARQ进程的TB上的数据。
  49. 如权利要求43或48所述的方法，其特征在于，所述终端依据所述指示信息在变更后的TTI长度所在的频域资源上发送数据之后，所述方法还包括：
    所述终端接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息。
  50. 如权利要求49所述的方法，其特征在于，若所述HARQ反馈信息为错误应答指令NACK，则所述终端接收网络设备发送的上行授权信息。
  51. 如权利要求49或50所述的方法，其特征在于，所述终端接收网络设备在下行链路上依据变更后的TTI长度发送的HARQ反馈信息，包括：
    所述终端接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息或上行授权信息对应的HARQ标识信息。
  52. 如权利要求51所述的方法，其特征在于，所述终端接收所述网络设备发送的所述HARQ反馈信息的HARQ标识信息之后，所述方法还包括：
    所述终端依据所述HARQ反馈信息的HARQ标识信息和TTI长度变更前的所述HARQ进程的状态，进行HARQ处理。
  53. 如权利要求51或52所述的方法，其特征在于，所述终端接收所述网络设备发送的上行授权信息对应的HARQ标识信息之后，所述方法还包括：
    所述终端依据所述上行授权信息对应的HARQ标识信息，和TTI长度变 更前的所述HARQ进程的状态，进行HARQ处理。
  54. 如权利要求52或53所述的方法，其特征在于，所述进行HARQ处理包括：
    若所述HARQ进程为至少两个HARQ进程，则对所述至少两个HARQ进程合并处理。
  55. 如权利要求43至54任一项所述的方法，其特征在于，所述指示信息通过无线资源控制RRC消息、广播消息、媒体接入控制层MAC控制元素CE和物理层信令中的至少之一或者组合，以显式方式接收或者以隐式方式接收。
  56. 如权利要求55所述的方法，其特征在于，若所述指示信息用于指示将至少一个HARQ进程的TB清零，且通过物理层信令接收，则所述指示信息通过物理层信令所在资源隐式接收；或者
    所述指示信息通过在下行控制信息DCI中包含的新数据到达被翻转指示信息接收。
  57. 如权利要求55所述的方法，其特征在于，若所述指示信息用于指示在变更后的TTI长度所在的频域资源上与网络设备进行通信，且通过物理层信令接收，则所述指示信息通过下行控制信息DCI接收。
  58. 如权利要求57所述的方法，其特征在于，所述DCI中还携带有HARQ标识和数据信息对应的调制编码方式MCS中的至少之一或组合。
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111491384A (zh) * 2019-01-25 2020-08-04 电信科学技术研究院有限公司 资源分配模式变更方法、变更配置方法、终端及网络设备
WO2020191754A1 (zh) * 2019-03-28 2020-10-01 富士通株式会社 指示信息的接收方法、发送方法及装置
CN113347040A (zh) * 2021-06-17 2021-09-03 北京天融信网络安全技术有限公司 配置变更方法、装置及电子设备
CN113630656A (zh) * 2021-08-05 2021-11-09 Vidaa美国公司 显示设备、终端设备及通信连接方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101507324A (zh) * 2006-06-19 2009-08-12 株式会社Ntt都科摩 基站、移动台和通信方法
CN101663852A (zh) * 2007-04-20 2010-03-03 高通股份有限公司 用于动态调整上行链路传输时间的方法和装置
CN104521281A (zh) * 2013-04-12 2015-04-15 华为技术有限公司 一种tti切换方法、基站及用户设备
WO2016064544A1 (en) * 2014-10-24 2016-04-28 Qualcomm Incorporated Flexible multiplexing and feedback for variable transmission time intervals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101507324A (zh) * 2006-06-19 2009-08-12 株式会社Ntt都科摩 基站、移动台和通信方法
CN101663852A (zh) * 2007-04-20 2010-03-03 高通股份有限公司 用于动态调整上行链路传输时间的方法和装置
CN104521281A (zh) * 2013-04-12 2015-04-15 华为技术有限公司 一种tti切换方法、基站及用户设备
WO2016064544A1 (en) * 2014-10-24 2016-04-28 Qualcomm Incorporated Flexible multiplexing and feedback for variable transmission time intervals

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111491384A (zh) * 2019-01-25 2020-08-04 电信科学技术研究院有限公司 资源分配模式变更方法、变更配置方法、终端及网络设备
WO2020191754A1 (zh) * 2019-03-28 2020-10-01 富士通株式会社 指示信息的接收方法、发送方法及装置
CN113347040A (zh) * 2021-06-17 2021-09-03 北京天融信网络安全技术有限公司 配置变更方法、装置及电子设备
CN113347040B (zh) * 2021-06-17 2024-02-02 北京天融信网络安全技术有限公司 配置变更方法、装置及电子设备
CN113630656A (zh) * 2021-08-05 2021-11-09 Vidaa美国公司 显示设备、终端设备及通信连接方法
CN113630656B (zh) * 2021-08-05 2024-04-05 Vidaa美国公司 显示设备、终端设备及通信连接方法

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