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WO2018027949A1 - Procédé de communication, dispositif de réseau et terminal - Google Patents

Procédé de communication, dispositif de réseau et terminal 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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WO
WIPO (PCT)
Prior art keywords
tti length
harq
terminal
network device
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/094990
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English (en)
Chinese (zh)
Inventor
时洁
张兴炜
黎超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2016/094990 priority Critical patent/WO2018027949A1/fr
Publication of WO2018027949A1 publication Critical patent/WO2018027949A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé de communication, un dispositif de réseau et un terminal. Un dispositif de réseau détermine qu'une longueur d'intervalle de temps de transmission (TTI) d'une liaison de communication est modifiée ; le dispositif de réseau envoie des informations d'indication à un terminal ; le terminal reçoit les informations d'indication envoyées par le dispositif de réseau à condition qu'il soit déterminé que la longueur de TTI de la liaison de communication est modifiée, efface les blocs de transmission (TB) d'au moins un processus HARQ du terminal en fonction des informations d'indication ou communique avec le dispositif de réseau sur une ressource de domaine de fréquence où la longueur de TTI modifiée est située, de façon à garantir l'envoi et la réception corrects de paquets de données dans un processus HARQ DL et un processus HARQ UL à condition que la longueur de TTI soit modifiée.
PCT/CN2016/094990 2016-08-12 2016-08-12 Procédé de communication, dispositif de réseau et terminal Ceased WO2018027949A1 (fr)

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WO2020191754A1 (fr) * 2019-03-28 2020-10-01 富士通株式会社 Procédé d'envoi d'informations d'indication, procédé de réception d'informations d'indication et appareil associé
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
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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
US12452476B2 (en) 2021-08-05 2025-10-21 VIDAA (Netherlands) International Holdings B.V. Display apparatus, terminal device and communication connection method

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