WO2018223872A1 - 一种通信方法及相关设备 - Google Patents

一种通信方法及相关设备 Download PDF

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Publication number
WO2018223872A1
WO2018223872A1 PCT/CN2018/088863 CN2018088863W WO2018223872A1 WO 2018223872 A1 WO2018223872 A1 WO 2018223872A1 CN 2018088863 W CN2018088863 W CN 2018088863W WO 2018223872 A1 WO2018223872 A1 WO 2018223872A1
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WIPO (PCT)
Prior art keywords
offset
downlink control
data channel
control channel
time
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Application number
PCT/CN2018/088863
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English (en)
French (fr)
Inventor
夏金环
吕永霞
Original Assignee
华为技术有限公司
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Publication of WO2018223872A1 publication Critical patent/WO2018223872A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a communication method and related devices.
  • the international telecommunication union defines three types of application scenarios for 5G and future mobile communication systems: enhanced mobile broadband (eMBB), high reliable low latency communication (ultra reliable and low latency). Communications, URLLC) and massive machine type communications (mMTC).
  • eMBB enhanced mobile broadband
  • URLLC high reliable low latency communication
  • mMTC massive machine type communications
  • typical URLLC services include: wireless control in industrial manufacturing or production processes, motion control of driverless cars and drones, and tactile interaction applications such as remote repair and remote surgery.
  • the main feature of these services is the requirement for ultra-high reliability and low latency.
  • air interface data is required to achieve 99.999% reliability transmission within a transmission delay of 1 millisecond.
  • the end-to-end service delay may be long in order to ensure the end-to-end service delay and the reliability of the service is not high.
  • both reliability and short delay are guaranteed. Therefore, how to achieve both reliability and short delay is an urgent problem to be solved.
  • the embodiment of the present application provides a communication method and related equipment, which are beneficial to ensure the reliability and short delay of the service at the same time.
  • an embodiment of the present application provides a communication method, where the method includes:
  • the access network device repeatedly sends a downlink control channel to the terminal device, where the downlink control channel is used to schedule transmission of the downlink data channel; the access network device repeatedly transmits the downlink data channel to the terminal device, and the downlink data channel is transmitted for the first time after the first transmission of the downlink control channel. And the downlink data channel is transmitted for the first time no later than the last transmission of the downlink control channel.
  • the terminal device is configured to quickly detect the downlink data channel, which is beneficial to the terminal detecting the downlink data channel before all downlink control channels are received, and ensuring service reliability. It also guarantees low latency for the business.
  • the access network device sends, to the terminal device, indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time, and a time domain resource for transmitting the downlink control channel for the first time. Transfer amount.
  • the terminal device can obtain the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource of the downlink data channel.
  • the frequency domain resource detects the downlink data channel in time.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is the time domain resource for transmitting the downlink data channel for the first time, and the time domain resource for transmitting the downlink control channel for the first time. Offset.
  • the terminal device can obtain the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource of the downlink data channel.
  • the frequency domain resource detects the downlink data channel in time.
  • the indication information includes a correspondence between the offset and the aggregation level.
  • the target offset can be flexibly configured, which is advantageous in reducing the delay of service transmission.
  • the indication information that is sent by the access network device to the terminal device for acquiring the target offset may include the target offset. That is to say, the access network device directly informs the terminal device of the specific target offset. For example, after the access network device determines the aggregation level of the downlink control channel that is currently delivered, the target offset may be obtained according to the correspondence between the offset and the aggregation level pre-stored by the access network device. The offset corresponding to the aggregation level of the downlink control channel that is currently delivered. The access network device sends the target offset to the terminal device through the configuration information or sends the downlink control information to the terminal device. By implementing the embodiment, the workload of the terminal device can be reduced, and the CPU resources of the terminal device can be saved.
  • an embodiment of the present application provides a communication method, where the method includes:
  • the terminal device detects a downlink control channel repeatedly sent by the access network device, and the downlink control channel is used for scheduling transmission of the downlink data channel; the terminal device detects the downlink data channel repeatedly transmitted by the access network device, and the downlink data channel is first transmitted on the downlink control channel for the first time. After transmission, and the downlink data channel is transmitted for the first time no later than the last transmission of the downlink control channel.
  • the terminal device can detect the downlink data channel before all downlink control channels are received. While ensuring the reliability of the service, it also guarantees low latency of the service.
  • the terminal device may obtain the target offset corresponding to the target aggregation level according to the correspondence between the pre-stored offset and the aggregation level, where the target aggregation level is the aggregation level of the downlink control channel currently detected, and the target is biased.
  • the shift is the offset of the time domain resource of the first downlink data channel, and the time domain resource of the downlink control channel is sent for the first time.
  • the specific implementation manner of the terminal device detecting the downlink data channel repeatedly sent by the access network device may be: The target offset, after detecting the downlink control channel, detects the downlink data channel.
  • the access network device does not send the indication information for acquiring the target offset to the terminal device, and the terminal device can determine the target offset, which is beneficial to save transmission resources.
  • the terminal device may further receive, by the access network device, indication information for acquiring a target offset, and obtain a target offset according to the indication information, where the target offset is a time domain for transmitting the downlink data channel for the first time.
  • the specific distance between the resource and the time domain resource for transmitting the downlink control channel for the first time is determined by the terminal device: the terminal device detects the downlink control channel according to the target offset. After that, the downlink data channel is detected.
  • the terminal device can acquire the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource and frequency of the downlink data channel.
  • the domain resource detects the downlink data channel in time.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is the time domain resource for transmitting the downlink data channel for the first time, and the time domain resource for transmitting the downlink control channel for the first time.
  • the terminal device may also obtain the target offset according to the indication information; the specific implementation manner of the terminal device detecting the downlink data channel repeatedly sent by the access network device may be: the terminal device detects the downlink control according to the target offset After the channel, the downlink data channel is detected.
  • the terminal device can acquire the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource and frequency of the downlink data channel.
  • the domain resource detects the downlink data channel in time.
  • the indication information includes a correspondence between the offset and the aggregation level.
  • the specific implementation manner of the terminal device acquiring the target offset according to the indication information may be: the offset and the aggregation level included by the terminal device according to the indication information.
  • the corresponding relationship between the target aggregation levels is the target offset level, and the target aggregation level is the aggregation level of the downlink control channel currently detected.
  • an embodiment of the present application provides a communication method, where the method includes:
  • the access network device repeatedly sends a downlink control channel to the terminal device, where the downlink control channel is used for scheduling transmission of the downlink data channel; the access network device repeatedly sends the downlink data channel to the terminal device, and the time domain resource of the downlink data channel that is sent at least for the first time includes Transmit time domain resources of multiple downlink control channels.
  • the implementation of the method described in the third aspect facilitates the terminal device to quickly detect the downlink data channel, and ensures low reliability while ensuring service reliability.
  • the access network device sends, to the terminal device, indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time, and a time domain resource for transmitting the downlink control channel for the first time. Transfer amount.
  • the terminal device can obtain the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource of the downlink data channel.
  • the frequency domain resource detects the downlink data channel in time.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is the time domain resource for transmitting the downlink data channel for the first time, and the time domain resource for transmitting the downlink control channel for the first time. Offset.
  • the terminal device can obtain the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource of the downlink data channel.
  • the frequency domain resource detects the downlink data channel in time.
  • the indication information includes a correspondence between the offset and the aggregation level.
  • the target offset can be flexibly configured, which is advantageous in reducing the delay of service transmission.
  • the indication information that is sent by the access network device to the terminal device for acquiring the target offset may include the target offset. That is to say, the access network device directly informs the terminal device of the specific target offset. For example, after the access network device determines the aggregation level of the downlink control channel that is currently delivered, the target offset may be obtained according to the correspondence between the offset and the aggregation level pre-stored by the access network device. The offset corresponding to the aggregation level of the downlink control channel that is currently delivered. The access network device sends the target offset to the terminal device through configuration information or sends the downlink control information to the terminal device. By implementing the embodiment, the workload of the terminal device can be reduced, and the CPU resources of the terminal device can be saved.
  • an embodiment of the present application provides a communication method, where the method includes:
  • the terminal device detects a downlink control channel repeatedly sent by the access network device, and the downlink control channel is used for scheduling transmission of the downlink data channel; the terminal device detects the downlink data channel repeatedly transmitted by the access network device, and at least the time domain of the downlink data channel sent for the first time.
  • the resource includes a time domain resource that transmits multiple downlink control channels.
  • the implementation of the method described in the fourth aspect facilitates the terminal device to quickly detect the downlink data channel, and ensures low reliability while ensuring service reliability.
  • the terminal device may obtain, according to a correspondence between the pre-stored offset and the aggregation level, a target offset corresponding to the target aggregation level, where the target aggregation level is an aggregation level of the downlink control channel currently detected,
  • the target offset is the offset of the time domain resource of the first transmission downlink data channel from the time domain resource of the first transmission downlink control channel;
  • the specific implementation manner of the terminal device detecting the downlink data channel repeatedly transmitted by the access network device may be: The device detects the downlink data channel after detecting the downlink control channel according to the target offset.
  • the access network device does not send the indication information for acquiring the target offset to the terminal device, and the terminal device can determine the target offset, which is beneficial to save transmission resources.
  • the terminal device may further receive, by the access network device, indication information for acquiring a target offset, and obtain a target offset according to the indication information, where the target offset is a time domain for transmitting the downlink data channel for the first time.
  • the specific distance between the resource and the time domain resource for transmitting the downlink control channel for the first time is determined by the terminal device: the terminal device detects the downlink control channel according to the target offset. After that, the downlink data channel is detected.
  • the terminal device can acquire the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource and frequency of the downlink data channel.
  • the domain resource detects the downlink data channel in time.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time and a time domain resource for transmitting the downlink control channel for the first time.
  • the terminal device may also obtain the target offset according to the indication information; the specific implementation manner of the terminal device detecting the downlink data channel repeatedly sent by the access network device may be: the terminal device detects the downlink control channel according to the target offset After that, the downlink data channel is detected.
  • the terminal device can acquire the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource and frequency of the downlink data channel.
  • the domain resource detects the downlink data channel in time.
  • the indication information includes a correspondence between the offset and the aggregation level.
  • the specific implementation manner of the terminal device acquiring the target offset according to the indication information may be: the offset and the aggregation level included by the terminal device according to the indication information.
  • the correspondence between the targets is obtained by the target offset corresponding to the target aggregation level, and the target aggregation level is the aggregation level of the downlink control channel currently detected.
  • an embodiment of the present application provides a communication method, where the method includes:
  • the access network device repeatedly sends a downlink control channel to the terminal device, where the downlink control channel is used to schedule the transmission of the uplink data channel; the access network device detects the uplink data channel repeatedly sent by the terminal device at the first moment, where the first moment is the earliest allowed The time when the terminal device repeatedly transmits the uplink data channel, where the offset of the first time interval from the time domain resource for transmitting the downlink control channel is the first offset, and the access network device receives the uplink data channel repeatedly sent by the terminal device for the first time. The moment is not earlier than the first moment.
  • the access network device can detect the uplink data channel in time because the earliest time for allowing the terminal device to repeatedly transmit the uplink data channel is not later than the actual time at which the access network device receives the uplink data channel. Therefore, by implementing the method described in the fifth aspect, it is advantageous to ensure short delay while ensuring reliability of the service.
  • the time domain resource of the downlink control channel detected by the terminal device and the time domain resource of the first uplink data channel sent by the terminal device repeatedly transmitting the uplink data channel have a second offset; the first offset and the second offset The offset is used by the terminal device to repeatedly send the uplink data channel according to the second offset if the second offset is greater than or equal to the first offset after detecting the downlink control channel; if the second offset is less than The first offset, the uplink data channel is repeatedly transmitted according to the first offset.
  • the access network device can detect the uplink data channel in time whenever the terminal device detects the downlink control channel.
  • the access network device may further send, to the terminal device, indication information for acquiring the first offset and/or indication information of the second offset.
  • the terminal device can acquire the first offset and/or the second offset in time, and determine the time domain of the uplink data channel according to the first offset and/or the second offset. Resources.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring the first offset and/or the second offset.
  • the terminal device can acquire the first offset and/or the second offset in time, and determine the time domain of the uplink data channel according to the first offset and/or the second offset. Resources.
  • the indication information includes: a first time domain resource that allows the terminal device to repeatedly send the uplink data channel, and a correspondence between the offset of the time domain resource that firstly sends the downlink control channel and the aggregation level, and/or the indication information includes detection.
  • the target offset can be flexibly configured, which is advantageous for reducing the delay of service transmission.
  • the indication information that is sent by the access network device to the terminal device for acquiring the first offset and/or the second offset may be A first offset and/or a second offset are included. That is to say, the access network device directly informs the terminal device of the specific first offset and/or the second offset. For example, after the access network device determines the aggregation level of the downlink control channel that is currently delivered, the time domain resource that is the earliest allowed terminal device that is pre-stored by the access network device to repeatedly transmit the time domain resource of the uplink data channel may be used to first transmit the time domain resource of the downlink control channel.
  • the first offset corresponding to the aggregation level of the downlink control channel that is currently delivered is obtained by the mapping between the offset and the aggregation level.
  • the access network device may repeatedly send the correspondence between the offset of the time domain resource of the first uplink data channel and the aggregation level of the first uplink data channel in the uplink data channel according to the pre-stored time domain resource of the detected downlink control channel. Obtaining a second offset corresponding to an aggregation level of the downlink control channel that is currently delivered.
  • the access network device transmits the first offset and/or the second offset to the terminal device via configuration information or to the terminal device via downlink control information.
  • an embodiment of the present application provides a communication method, where the method includes:
  • the terminal device detects a downlink control channel repeatedly sent by the access network device, where the downlink control channel is used for scheduling transmission of the uplink data channel; after detecting the downlink control channel, the terminal device repeatedly sends the uplink data channel to the access network device, and the terminal device is the first time
  • the time at which the uplink data channel is sent is not earlier than the first time, and the first time is the time when the terminal device is allowed to repeatedly send the uplink data channel, and the first time is offset from the time domain resource for transmitting the downlink control channel for the first time. Offset.
  • the access network device Since the time when the terminal device sends the uplink data channel for the first time is not earlier than the first time, the access network device detects the uplink data channel at the first time, and can detect the uplink data channel in time. Therefore, by implementing the method described in the sixth aspect, it is advantageous to ensure short delay while ensuring reliability of the service.
  • the time domain resource of the downlink control channel detected by the terminal device and the time domain resource of the first uplink data channel sent by the terminal device repeatedly transmitting the uplink data channel have a second offset; the terminal device repeats to the access network device.
  • the specific implementation manner of sending the uplink data channel may be: if the second offset is greater than or equal to the first offset, the uplink data channel is repeatedly sent according to the second offset; if the second offset is smaller than the first offset The amount is then repeatedly transmitted according to the first offset.
  • the access network device can detect the uplink data channel in time whenever the terminal device detects the downlink control channel.
  • the terminal device may further receive, by the access network device, indication information for acquiring the first offset and/or the second offset, and obtain the first offset and/or the second according to the indication information. Offset.
  • the terminal device can acquire the first offset and/or the second offset in time, and determine the time domain of the uplink data channel according to the first offset and/or the second offset. Resources.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring the first offset and/or the second offset.
  • the terminal device may further obtain the first offset and/or the first information according to the indication information. Two offsets.
  • the terminal device can acquire the first offset and/or the second offset in time, and determine the time domain of the uplink data channel according to the first offset and/or the second offset. Resources.
  • the indication information includes: a first time domain resource that allows the terminal device to repeatedly send the uplink data channel, and a correspondence between the offset of the time domain resource that firstly sends the downlink control channel and the aggregation level, and/or the indication information includes detection.
  • the specific implementation manner of the shift amount and/or the second offset includes: the offset and the aggregation level of the time domain resource for transmitting the downlink control channel for the first time according to the time domain resource distance that the terminal device allows the terminal device to repeatedly transmit the uplink data channel.
  • the target aggregation level is an aggregation level of the currently detected downlink control channel; and/or the terminal device according to the detected time domain resource distance of the downlink control channel Repeatedly transmitting the time domain of the first uplink data channel in the uplink data channel Source offset polymerization correspondence between the levels, obtaining second offset corresponding to the target aggregation level.
  • the target offset can be flexibly configured, which is advantageous for reducing the delay of service transmission.
  • the terminal device obtains the target aggregation level according to the pre-stored time domain resource distance of the earliest allowed terminal device to repeatedly send the uplink data channel, and the corresponding relationship between the offset of the time domain resource of the downlink control channel and the aggregation level.
  • the target aggregation level is an aggregation level of the downlink control channel currently detected; and/or, the terminal device may repeatedly send the uplink data according to the pre-stored detected time domain resource of the downlink control channel.
  • the access network device does not send the indication information for acquiring the first offset and/or the second offset to the terminal device, and the terminal device may determine the first offset and/or the second Offset, which helps to save transmission resources.
  • the indication information that is sent by the terminal device and used by the terminal device to obtain the first offset and/or the second offset (instructed by the high-level configuration or the indication information carried by the downlink control information) ) may include a first offset and/or a second offset. That is to say, the access network device directly informs the terminal device of the specific first offset and/or the second offset. For example, after the access network device determines the aggregation level of the downlink control channel that is currently delivered, the time domain resource that is the earliest allowed terminal device that is pre-stored by the access network device to repeatedly transmit the time domain resource of the uplink data channel may be used to first transmit the time domain resource of the downlink control channel.
  • the first offset corresponding to the aggregation level of the downlink control channel that is currently delivered is obtained by the mapping between the offset and the aggregation level.
  • the access network device may repeatedly send the correspondence between the offset of the time domain resource of the first uplink data channel and the aggregation level of the first uplink data channel in the uplink data channel according to the pre-stored time domain resource of the detected downlink control channel. Obtaining a second offset corresponding to an aggregation level of the downlink control channel that is currently delivered.
  • the access network device sends the first offset and/or the second offset to the terminal device through the configuration information or to the terminal device through the downlink control information.
  • the seventh aspect provides an access network device, where the access network device can perform the foregoing first aspect, the third aspect, the fifth aspect, the possible implementation manner of the first aspect, the possible implementation manner of the third aspect, or the third Five possible ways of implementing the approach.
  • This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the unit can be software and/or hardware.
  • a terminal device can perform the foregoing second aspect, the fourth aspect, the sixth aspect, the possible implementation manner of the second aspect, the possible implementation manner of the fourth aspect, or the sixth aspect
  • the method in the implementation can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the unit can be software and/or hardware.
  • an access network device comprising: a processor, a memory, a communication interface, and one or more programs; the processor, the communication interface, and the memory are connected; wherein, one or more programs Stored in a memory, the processor calls a program stored in the memory to implement the first aspect, the third aspect, the fifth aspect, a possible implementation of the first aspect, a possible implementation of the third aspect, or a fifth
  • the implementation manner and the beneficial effects of the access network device for solving the problem refer to the foregoing first aspect, the third aspect, the fifth aspect, the possible implementation manner of the first aspect, and the possible aspect of the third aspect.
  • the implementation manners or the possible implementation manners and beneficial effects of the fifth aspect are not repeated here.
  • a terminal device comprising: a processor, a memory, a communication interface, and one or more programs; the processor, the communication interface, and the memory are connected; wherein one or more programs are stored in the memory
  • the processor calls a program stored in the memory to implement the second aspect, the fourth aspect, the sixth aspect, the possible implementation of the second aspect, the possible implementation of the fourth aspect, or the possible implementation of the sixth aspect
  • the solution in the manner, the implementation manner and the beneficial effects of the terminal device solving the problem can be referred to the foregoing second aspect, the fourth aspect, the sixth aspect, the second aspect possible implementation manner, the fourth aspect possible implementation manner or the sixth aspect Possible implementations and benefits, repetitions are not repeated here.
  • a computer program product which, when run on a computer, causes the computer to perform the method of any of the first to sixth aspects, or the method of any of the first to sixth aspects Any optional implementation.
  • FIG. 1 is a schematic diagram of a conventional communication system
  • FIG. 2 is a schematic diagram of a conventional downlink control channel and downlink data channel transmission
  • FIG. 3 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of downlink control channel and downlink data channel transmission according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another downlink control channel and downlink data channel transmission according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 7 and FIG. 8 are schematic diagrams of downlink control channel and downlink data channel transmission according to an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of still another communication method according to an embodiment of the present application.
  • FIG. 10 and FIG. 11 are schematic diagrams of downlink control channel and downlink data channel transmission according to an embodiment of the present application.
  • FIG. 12 is a schematic flowchart diagram of still another communication method according to an embodiment of the present application.
  • FIG. 13 and FIG. 14 are schematic diagrams of downlink control channel and uplink data channel transmission according to an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of an access network device according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic structural diagram of another access network device according to an embodiment of the present disclosure.
  • FIG. 18 is a schematic structural diagram of another terminal device according to an embodiment of the present application.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • the communication system includes an access network device and one or more terminal devices, and the access network device can communicate with the terminal device.
  • Figure 1 shows an example in which an access network device communicates with two terminal devices. It can be understood that the access network device can communicate with any number of terminal devices.
  • the communication system may be a public land mobile network (PLMN) network or a D2D (mevice to mevice) network or an M2M (machine to machine) network or other network.
  • PLMN public land mobile network
  • D2D device to mevice
  • M2M machine to machine
  • the access network device may be a device that communicates with the terminal device, for example, an access network device controller or the like.
  • Each access network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices (eg, UEs) located within the coverage area (cell), and the access network device can support different standard communication protocols. Or you can support different communication modes.
  • the access network device may be a base transceiver station (BTS) in a GSM system or a CDMA system, or an access network device (NodeB, NB) in a WCDMA system, or may be an LTE system.
  • BTS base transceiver station
  • NodeB, NB access network device
  • An evolved access network device (evolutional node B, eNB or eNodeB), or a wireless controller in a cloud radio access network (CRAN), or the access network device may be in a future 5G network Access network equipment, such as gNB or small station, micro station, TRP (transmission reception point), may also be a relay station, an access point or a public land mobile network (PLMN) in a future evolution. Access network equipment, etc.
  • the terminal device may refer to an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile terminal, a user terminal, Terminal, wireless communication device, user agent or user device.
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • Access network equipment and terminal equipment can be deployed on land, indoors or outdoors, hand-held or on-board; they can also be deployed on the water; they can also be deployed on airborne aircraft, balloons and satellites.
  • the application scenarios of the access network device and the terminal device are not limited in the embodiment of the present application.
  • the method for improving service reliability is specifically embodied by: after the base station repeatedly transmits the downlink control channel several times, the downlink data channel is repeatedly transmitted.
  • the downlink control channel is used to schedule transmission of a downlink data channel.
  • the base station repeatedly transmits the downlink control channel continuously in three transmission time intervals, and repeatedly transmits the downlink data channel in three consecutive transmission time intervals from the transmission time interval n+4. That is, three identical downlink control channels are continuously transmitted during the transmission time interval n to the transmission time interval n+2, and three identical downlink data are continuously transmitted during the transmission time interval n+4 to the transmission time interval n+6. channel.
  • the reliability of the service is improved by repeatedly transmitting the downlink control channel and the downlink data channel.
  • the terminal device needs to detect the downlink control channel first, obtain downlink control information, and determine the frequency domain resource of the downlink data channel according to the downlink control information.
  • the terminal device receives and detects the downlink data channel in the frequency domain resource of the downlink data channel.
  • the terminal device detects the downlink control channel at any one of the transmission time interval n, the transmission time interval n+1, or the transmission time interval n+2, and must start at the transmission time interval n+4. Receive and detect the downlink data channel. It can be seen that this method has a large delay.
  • the embodiment of the present application provides a communication method and related equipment, which are beneficial to ensure the reliability and short delay of the service at the same time.
  • FIG. 3 is a communication method provided by an embodiment of the present application. As shown in FIG. 3, the communication method includes the following sections 301 to 304, wherein:
  • the access network device repeatedly sends a downlink control channel to the terminal device.
  • the downlink control channel is used to schedule transmission of the downlink data channel.
  • the access network device sends the downlink control channel to the terminal device at least twice, and the downlink control channel transmitted each time is the same.
  • the access network device repeatedly sends a downlink data channel to the terminal device, where the downlink data channel is transmitted for the first time after the first transmission of the downlink control channel, and the downlink data channel is transmitted for the first time no later than the last transmission of the downlink control channel.
  • the access network device sends at least two downlink data channels to the terminal device, and the downlink data channels that are sent each time are the same.
  • the downlink data channel is transmitted no later than the downlink control channel.
  • the last transmission means that the time of the first transmission of the downlink data channel is before the last transmission time of the downlink control channel, or the time of the first transmission of the downlink data channel is equal to the last transmission of the downlink control channel. time.
  • the access network device sends four downlink control channels to the terminal device, and each time the downlink control channel is sent is the same, the access network device sends five downlink data channels to the terminal device, and each downlink is sent.
  • the data channels are the same. 4 shows the time when the downlink data channel is transmitted for the first time after the time when the downlink control channel is transmitted for the first time, and the time when the downlink data channel is transmitted for the first time is taken as an example before the time when the downlink control channel is last transmitted.
  • the terminal device detects a downlink control channel that is repeatedly sent by the access network device.
  • the terminal device may detect a downlink control channel that is repeatedly sent by the access network device in part 301.
  • the terminal device detects a downlink data channel repeatedly sent by the access network device.
  • the terminal device may obtain downlink control information in the downlink control channel, and determine frequency domain resources of the downlink data channel according to the downlink control information, so that the terminal device may be in the downlink.
  • the frequency domain resource of the data channel detects the downlink data channel repeatedly transmitted by the access network device.
  • the terminal device can detect the downlink data channel from the second symbol. If the terminal device detects the second downlink control channel in the second symbol, the terminal device may start detecting the downlink data channel in the third symbol, and so on. Alternatively, the terminal device may also buffer all data received at the same time when detecting the downlink control channel. For example, when the second symbol detects the second downlink control channel, the terminal device buffers both the downlink control channel and the downlink data channel that are simultaneously received.
  • OFDM orthogonal frequency duplex multiplexing
  • the terminal device After the terminal device detects the second downlink control channel, determining the frequency domain resource of the downlink data channel according to the downlink control information carried by the downlink control channel.
  • the terminal device may start detecting the downlink data channel from the buffered data received in the second symbol according to the frequency domain resource of the downlink data channel. The total number of times the access network device configures the downlink data channel of the terminal device.
  • the terminal device starts detecting the downlink data channel from the data received by the second symbol. If the downlink data channel is not successfully detected in the data received by the second symbol, the data received by the subsequent symbols may be combined and detected until the downlink data channel is detected.
  • the terminal device can quickly detect the downlink data channel, instead of detecting the downlink data channel after all the downlink control channels are received, and ensuring service reliability, It can guarantee low latency of the business.
  • the resource used for each transmission of the downlink control channel may be one OFDM symbol, one time slot (including several OFDM symbols), several symbols in one time slot, or one subframe (including several) in the time domain. Time slots).
  • the resource used by the downlink control channel for each transmission is one OFDM symbol or several OFDM symbols or subframes in a time slot or a time slot
  • the resources used for transmitting the downlink data channel are not in the time domain.
  • it may be an OFDM symbol, which may be a time slot, or a subframe, or an aggregation of several time slots, or aggregation of several subframes, and the like.
  • the resources used for each transmission of the downlink control channel and the downlink data channel are one OFDM symbol or one slot or one subframe in the time domain.
  • the resource used for each transmission of the downlink control channel is one OFDM symbol in the time domain, and the resource used for each transmission of the downlink data channel may be two OFDM symbols in the time domain.
  • the access network device may further send indication information for acquiring the target offset to the terminal device.
  • the target offset is the offset of the time domain resource of the first downlink data channel from the time domain resource of the first downlink control channel.
  • the terminal device may further receive indication information that is sent by the access network device for acquiring the target offset.
  • the terminal device can also acquire the target offset according to the indication information.
  • the specific implementation manner of the terminal device detecting the downlink data channel repeatedly transmitted by the access network device is: the terminal device detects the downlink data channel after detecting the downlink control channel according to the target offset.
  • the indication information may be configured by a high layer, that is, the indication information may be included in the configuration information and sent to the terminal device.
  • the configuration information may include at least one of the following: the indication information used to obtain the downlink control channel resource set, the indication information used to obtain whether the downlink control channel is repeatedly sent, and the indication used to obtain the number of times the downlink control channel is repeatedly sent.
  • the information is used to obtain the indication information of the start position in the time domain of the downlink control channel when the transmission is repeated, and is used to obtain the indication information of the number of times of repeated transmission of the downlink data channel.
  • the configured target offset may be 0, or the time in the time domain for transmitting the downlink control channel in the time domain, or at least two. The time that the downlink control channel is transmitted in the time domain, or at least three times the time that the downlink control channel is transmitted in the time domain, and the like.
  • the target offset is one OFDM symbol. If the resources used for each transmission of the downlink control channel and the downlink data channel are one time slot in the time domain, the target offset is one time slot. If the resources used for each transmission of the downlink control channel and the downlink data channel are one subframe in the time domain, the target offset is one subframe.
  • the target offset is one OFDM symbol.
  • the terminal device may obtain downlink control information carried by the downlink control channel, and determine frequency domain resources of the downlink data channel according to the downlink control information. And the terminal device can determine the time domain resource of the downlink data channel according to the target offset. For example, the terminal device can determine the time domain resource sent by the downlink data channel according to the time domain resource and the target offset that are first sent by the downlink control channel. The terminal device can start detecting the downlink data channel according to the frequency domain resource and the time domain resource of the downlink data channel.
  • the terminal device can acquire the target offset in time, and accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource and the frequency domain of the downlink data channel.
  • the resource detects the downlink data channel in time.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time, and the time domain resource for transmitting the downlink control channel for the first time. Offset.
  • the terminal device may obtain indication information from the downlink control information, so as to obtain the target offset according to the indication information.
  • the terminal device determines the time domain resource of the downlink data channel according to the target offset, and determines the frequency domain resource of the downlink data channel according to the downlink control information, so as to detect the downlink data channel according to the time domain resource and the frequency domain resource of the downlink data channel.
  • the terminal device can accurately determine the time domain resource of the downlink data channel according to the target offset, and can accurately detect the downlink data channel according to the time domain resource and the frequency domain resource of the downlink data channel.
  • the indication information that is sent by the access network device to the terminal device for acquiring the target offset includes an offset and an aggregation level.
  • the specific implementation manner of the terminal device acquiring the target offset according to the indication information may be: the terminal device acquires the target offset corresponding to the target aggregation level according to the correspondence between the offset and the aggregation level included in the indication information, and the target aggregation level. The aggregation level of the downlink control channel is currently detected.
  • the indication information includes an offset of 1 corresponding to aggregation level 1, and an offset of 2 corresponding to aggregation level 2. If the aggregation level of the currently detected downlink control channel is aggregation level 2, the target offset is offset 2.
  • the downlink control channel When the downlink control channel is transmitted, it may be transmitted using any one of a plurality of aggregation levels (AL).
  • A aggregation levels
  • the downlink control channel If the downlink control channel is sent by using a higher aggregation level, the higher the probability that the terminal device detects the downlink control information, the terminal device may detect the downlink control channel once and then successfully detect the downlink control information. Therefore, the higher the aggregation level, the longer the time from the first transmission of the downlink data channel to the time when the control channel is transmitted for the first time is not too long; if the aggregation level used is small, the downlink data is sent for the first time.
  • the time of the channel is relatively long from the time when the control channel is first transmitted, as shown in FIG.
  • a smaller offset can be set corresponding to a larger aggregation level, and a larger offset corresponds to a smaller aggregation level.
  • offset 1 one OFDM symbol
  • offset 2 two OFDM symbols
  • the offset 1 is smaller than the offset 2
  • the aggregation level 1 is greater than the aggregation level 2.
  • the terminal device acquires a target offset corresponding to the target aggregation level according to the correspondence between the pre-stored offset and the aggregation level, where the target aggregation level is an aggregation level of the currently detected downlink control channel; and the terminal device detects
  • the specific implementation manner of the downlink data channel repeatedly transmitted by the access network device may be: the terminal device detects the downlink data channel after detecting the downlink control channel according to the target offset.
  • the access network device may not send indication information for acquiring the target offset to the terminal device.
  • the terminal device itself stores a correspondence between the offset and the aggregation level. After the terminal device detects the downlink control channel, the aggregation level of the currently detected downlink control channel can be obtained. The terminal device acquires a target offset corresponding to the currently detected aggregation level of the downlink control channel. For example, the terminal device prestores a correspondence relationship: the offset 1 corresponds to the aggregation level 1, and the offset 2 corresponds to the aggregation level 2. If the aggregation level of the currently detected downlink control channel is aggregation level 2, the target offset is offset 2.
  • the terminal device After detecting the downlink control channel, the terminal device determines the time domain resource of the downlink data channel according to the target offset, and determines the frequency domain resource of the downlink data channel according to the downlink control information carried by the downlink control channel.
  • the terminal device can detect the downlink data channel according to the time domain resource and the frequency domain resource of the downlink data channel.
  • the access network device does not send the indication information for acquiring the target offset to the terminal device, and the terminal device can determine the target offset, which is beneficial to save transmission resources.
  • the indication information that is sent by the access network device to the terminal device for acquiring the target offset may include the target offset. That is to say, the access network device directly informs the terminal device of the specific target offset. For example, after the access network device determines the aggregation level of the downlink control channel that is currently delivered, the target offset may be obtained according to the correspondence between the offset and the aggregation level pre-stored by the access network device. The offset corresponding to the aggregation level of the downlink control channel that is currently delivered. The access network device sends the target offset to the terminal device through the configuration information or sends the downlink control information to the terminal device. By implementing the embodiment, the workload of the terminal device can be reduced, and the CPU resources of the terminal device can be saved.
  • the access network device repeatedly sends the downlink control channel and the downlink data channel to the terminal device.
  • the downlink control channels in the transmission time interval n to the transmission time interval n+2 are the same, and the downlink data channels are also the same.
  • the downlink control channel is used to schedule transmission of the downlink data channel.
  • the downlink control channel is transmitted once in one transmission time interval, and the downlink data channel is also transmitted once in one transmission time interval. If the downlink control channel sent by the terminal device through the transmission time interval n cannot successfully detect the downlink control information, the downlink control channel needs to be detected within the transmission time interval n+1. If the downlink control information in the transmission time interval n+1 is successfully detected, the downlink data channel can be detected. Alternatively, the downlink control channel in the transmission time interval n+1 and the downlink control channel in the transmission time interval n are combined and detected, and if the downlink control information is successfully detected, the downlink data channel can be detected.
  • the embodiment of the present application further provides a communication method and related equipment.
  • the communication method and device provided by the present application are further described below.
  • FIG. 9 is a communication method provided by an embodiment of the present application. As shown in FIG. 9, the communication method includes the following sections 901 to 904, wherein:
  • the access network device repeatedly sends a downlink control channel to the terminal device.
  • the access network device sends the downlink control channel to the terminal device at least twice, and the downlink control channel sent each time is the same.
  • the downlink control channel is used to schedule transmission of the downlink data channel.
  • the access network device repeatedly sends the downlink data channel to the terminal device, and the time domain resource of the downlink data channel that is sent at least for the first time includes a time domain resource that sends multiple downlink control channels.
  • the access network device sends at least two downlink data channels to the terminal device, and the downlink data channels that are sent each time are the same.
  • the time domain resource of the downlink data channel that is sent each time includes the time domain resource that sends the downlink control channel multiple times.
  • the time domain resource of the downlink data channel that is sent each time includes a time domain resource that sends multiple downlink control channels.
  • the time domain resource of the downlink data channel that is sent at least for the first time includes the time domain resource that sends the downlink control channel multiple times: the time domain resource of the downlink data channel that is sent at least for the first time includes the time domain resource that sends the downlink control channel at least twice. , or at least three time domain resources of the downlink control channel are sent.
  • the access network device sends five downlink control channels to the terminal device, and each time the downlink control channel is sent is the same, and the access network device sends three downlink data channels to the terminal device, and each downlink data is sent.
  • the channels are the same.
  • the time-frequency resource of the downlink data channel transmitted for the first time includes the time domain resources of the two downlink control channels.
  • the time-frequency resource of the downlink data channel that is transmitted for the second time also includes the time domain resource of the two downlink control channels
  • the time-frequency resource of the downlink data channel that is sent for the third time includes only the time domain resource of the downlink control channel.
  • the time-frequency resource of the downlink data channel sent for the third time may also include the time domain resource of multiple downlink control channels.
  • one transmission time interval may be one time slot, one mini time slot, one subframe, aggregation of several symbols, aggregation of several time slots, aggregation of several mini slots, or aggregation of several subframes.
  • the embodiments of the present application are not limited.
  • the terminal device detects a downlink control channel that is repeatedly sent by the access network device.
  • the terminal device may detect a downlink control channel that is repeatedly sent by the access network device in the 901 part.
  • the terminal device detects a downlink data channel repeatedly sent by the access network device.
  • the terminal device may obtain downlink control information in the downlink control channel, and determine frequency domain resources of the downlink data channel according to the downlink control information, so that The frequency domain resource detects a downlink data channel repeatedly transmitted by the access network device.
  • the terminal device may buffer all data received during the transmission time interval n, and the terminal device detects the second downlink control channel transmitted during the transmission time interval n to obtain downlink control information.
  • the terminal device determines the frequency domain resource of the downlink data channel according to the downlink control information.
  • the terminal device may start detecting the downlink data channel from the data received in the buffered transmission time interval n according to the frequency domain resource of the downlink data channel, until the downlink data channel is detected. It can be seen that, by implementing the method described in FIG. 9, after detecting the downlink control channel in the transmission time interval n, the terminal device can detect the downlink data channel immediately, which is beneficial to quickly detecting the downlink data channel, while ensuring service reliability.
  • the method for transmitting the downlink control channel and the downlink data channel shown in FIG. 10 can be applied to a case where the system bandwidth is not very large, and the terminal device has the capability to buffer data in the entire system bandwidth, that is, before the downlink control information is correctly detected. The data has been received and cached.
  • the terminal device successfully detects the downlink control information when the transmission time interval n ends, detecting the downlink data channel from the transmission time interval n+1 until the downlink data channel is detected; If the downlink control information is successfully detected when the transmission time interval n+1 ends, the downlink data channel is detected from the transmission time interval n+2 until the downlink data channel is detected. It can be seen that, by implementing the method described in FIG. 9, after detecting the downlink control channel in the transmission time interval n, the terminal device can immediately detect the downlink data channel at the transmission time interval n+1, which is advantageous for quickly detecting the downlink data channel. While ensuring business reliability, low latency can also be guaranteed.
  • the method for transmitting the downlink control channel and the downlink data channel shown in FIG. 11 can be applied to a case where the system bandwidth is relatively large, so that the storage space of the terminal device can be saved.
  • the access network device may further send, to the terminal device, indication information for acquiring a target offset.
  • the target offset is the offset of the time domain resource of the first downlink downlink data channel from the time domain resource of the first downlink control channel.
  • the target offset is one transmission time interval.
  • the terminal device may further receive indication information that is sent by the access network device for acquiring the target offset.
  • the terminal device can also acquire the target offset according to the indication information.
  • the specific implementation manner of the terminal device detecting the downlink data channel repeatedly transmitted by the access network device is: the terminal device detects the downlink data channel after detecting the downlink control channel according to the target offset.
  • the indication information may be configured by a high layer, that is, the indication information may be included in the configuration information and sent to the terminal device.
  • the configuration information may include at least one of the following: the indication information used to obtain the downlink control channel resource set, the indication information used to obtain whether the downlink control channel is repeatedly sent, and the indication used to obtain the number of times the downlink control channel is repeatedly sent.
  • the information is used to obtain the indication information of the start position in the time domain of the downlink control channel when the transmission is repeated, and is used to obtain the indication information of the number of times of repeated transmission of the downlink data channel.
  • the terminal device may obtain downlink control information carried by the downlink control channel, and determine frequency domain resources of the downlink data channel according to the downlink control information. And the terminal device can determine the time domain resource of the downlink data channel according to the target offset. For example, the terminal device can determine the time domain resource of the downlink data channel according to the time domain resource and the target offset that are first sent by the downlink control channel. The terminal device can detect the downlink data channel according to the frequency domain resource and the time domain resource of the downlink data channel.
  • the terminal device can determine the target offset in time, and can accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource and frequency of the downlink data channel.
  • the domain resource accurately detects the downlink data channel.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is the time domain resource for transmitting the downlink data channel for the first time, and the time domain resource for transmitting the downlink control channel for the first time. Offset.
  • the terminal device may obtain indication information from the downlink control information, so as to obtain the target offset according to the indication information.
  • the terminal device determines the time domain resource of the downlink data channel according to the target offset, and determines the frequency domain resource of the downlink data channel according to the downlink control information, so as to detect the downlink data channel according to the time domain resource and the frequency domain resource of the downlink data channel.
  • the terminal device can determine the target offset in time, and the terminal device can accurately determine the time domain resource of the downlink data channel according to the target offset, and further can be based on the time domain resource of the downlink data channel.
  • the frequency domain resources accurately detect the downlink data channel.
  • the indication information that is sent by the access network device to the terminal device for acquiring the target offset includes an offset and an aggregation level.
  • the specific implementation manner of the terminal device acquiring the target offset according to the indication information may be: the terminal device acquires the target offset corresponding to the target aggregation level according to the correspondence between the offset and the aggregation level included in the indication information, and the target aggregation level. The aggregation level of the downlink control channel is currently detected.
  • the indication information includes an offset of 1 corresponding to aggregation level 1, and an offset of 2 corresponding to aggregation level 2. If the aggregation level of the currently detected downlink control channel is aggregation level 2, the target offset is offset 2.
  • the terminal may detect the downlink control channel sent once and then successfully detect the downlink control information. Therefore, the higher the aggregation level, the longer the time from the first transmission of the downlink data channel to the time when the control channel is transmitted for the first time is not too long; if the aggregation level used is small, the downlink data is sent for the first time. The time of the channel is relatively long from the time of the first transmission of the control channel.
  • a smaller offset can be set corresponding to a larger aggregation level, and a larger offset corresponds to a smaller aggregation level.
  • offset 1 one OFDM symbol
  • offset 2 two OFDM symbols
  • the target offset can be flexibly configured, which is advantageous for reducing the delay of service transmission.
  • the terminal device acquires a target offset corresponding to the target aggregation level according to the correspondence between the pre-stored offset and the aggregation level, where the target aggregation level is an aggregation level of the currently detected downlink control channel; and the terminal device detects
  • the specific implementation manner of the downlink data channel repeatedly transmitted by the access network device may be: the terminal device detects the downlink data channel after detecting the downlink control channel according to the target offset.
  • the access network device may not send indication information for acquiring the target offset to the terminal device.
  • the terminal device itself stores a correspondence between the offset and the aggregation level.
  • the aggregation level of the currently detected downlink control channel may be acquired.
  • the terminal device acquires a target offset corresponding to the aggregation level of the currently detected downlink control channel. For example, the terminal device prestores a correspondence relationship: the offset 1 corresponds to the aggregation level 1, and the offset 2 corresponds to the aggregation level 2. If the aggregation level of the currently detected downlink control channel is aggregation level 2, the target offset is offset 2.
  • the terminal device After detecting the target offset and the downlink control channel, the terminal device determines the time domain resource of the downlink data channel according to the target offset, and determines the frequency domain resource of the downlink data channel according to the downlink control information carried by the downlink control channel.
  • the terminal device can detect the downlink data channel according to the time domain resource and the frequency domain resource of the downlink data channel.
  • the access network device does not send the indication information for acquiring the target offset to the terminal device, and the terminal device can determine the target offset, which is beneficial to save transmission resources.
  • the indication information that is sent by the access network device to the terminal device for acquiring the target offset may include the target offset. That is to say, the access network device directly informs the terminal device of the specific target offset. For example, after the access network device determines the aggregation level of the downlink control channel that is currently delivered, the target offset may be obtained according to the correspondence between the offset and the aggregation level pre-stored by the access network device. The offset corresponding to the aggregation level of the downlink control channel that is currently delivered. The access network device sends the target offset to the terminal device through the configuration information or sends the downlink control information to the terminal device. By implementing the implementation manner, the workload of the terminal device can be reduced, and the CPU resources of the terminal device can be saved.
  • the target offset may be 0, a transmission time interval or multiple transmission time intervals. As shown in FIG. 11, the target offset is one transmission time interval.
  • the repeated transmission of the downlink control channel may not be the same downlink control channel that is continuously transmitted, and the repeated transmission of the downlink data channel may not be the same downlink data channel that is continuously transmitted.
  • the downlink control channels sent twice may include invalid subframes, or the downlink data channels transmitted twice may include invalid subframes.
  • the invalid subframe here may be a subframe for uplink transmission, or a multicast broadcast single frequency network (MBSFN) subframe, or a subframe for different frequency measurement.
  • FIG. 2, FIG. 4, FIG. 5, FIG. 7, FIG. 8, FIG. 10, and FIG. 11 are examples of continuously transmitting the same downlink control channel and continuously transmitting the same downlink data channel.
  • FIG. 2 FIG.
  • the downlink control channel and the downlink data channel in FIG. 5, FIG. 7, FIG. 8, FIG. 10, FIG. 11 may also be discontinuously transmitted.
  • the embodiment of the present application further provides a communication method and related equipment.
  • the communication method and device provided by the present application are further described below.
  • FIG. 12 is a communication method provided by an embodiment of the present application. As shown in FIG. 12, the communication method includes the following sections 1201 to 1204, wherein:
  • the access network device repeatedly sends a downlink control channel to the terminal device.
  • the access network device sends the downlink control channel to the terminal device at least twice, and the downlink control channel sent each time is the same.
  • the downlink control channel is used to schedule the transmission of the uplink data channel.
  • the access network device detects, at a first moment, an uplink data channel repeatedly sent by the terminal device, where the first time is the earliest time for allowing the terminal device to repeatedly send the uplink data channel, where the first time is the time domain for transmitting the downlink control channel for the first time.
  • the offset of the resource is the first offset, and the time when the access network device receives the uplink data channel repeatedly sent by the terminal device for the first time is not earlier than the first time.
  • the terminal device detects a downlink control channel that is repeatedly sent by the access network device.
  • the terminal device may detect a downlink control channel that is repeatedly sent by the access network device in part 1201.
  • the terminal device After detecting the downlink control channel, the terminal device repeatedly sends the uplink data channel to the access network device, and the time when the terminal device sends the uplink data channel for the first time is not earlier than the first time.
  • the time when the terminal device is allowed to repeatedly transmit the uplink data channel is the third symbol. Therefore, the first offset is 2 symbols.
  • the time at which the terminal device actually transmits the uplink data channel is the fourth symbol.
  • the access network device can start detecting the uplink data channel at the third symbol.
  • the access network device can detect the uplink data channel in time because the earliest time for allowing the terminal device to repeatedly transmit the uplink data channel is not later than the actual time at which the access network device receives the uplink data channel. Therefore, by implementing the method described in FIG. 12, it is advantageous to ensure short delay while ensuring reliability of the service.
  • the time domain resource of the downlink control channel detected by the terminal device has a second offset from the time domain resource that the terminal device sends the uplink data channel for the first time, where the first sending the uplink data channel refers to repeatedly sending the uplink data channel.
  • the first offset and the second offset are used by the terminal device to repeatedly send the uplink data channel according to the second offset if the second offset is greater than or equal to the first offset after detecting the downlink control channel. If the second offset is less than the first offset, the uplink data channel is repeatedly transmitted according to the first offset.
  • the specific implementation manner in which the terminal device repeatedly sends the uplink data channel to the access network device includes: if the second offset is greater than or equal to the first offset, the uplink data channel is repeatedly sent according to the second offset; If the second offset is less than the first offset, the uplink data channel is repeatedly transmitted according to the first offset.
  • the first offset of the first downlink control information from the time when the terminal device is allowed to repeatedly transmit the uplink data channel is 2 symbols. If the terminal device detects the first downlink control information, the second time offset of the time domain resource of the first downlink control information from the terminal device repeatedly transmitting the time domain resource of the first uplink data channel in the uplink data channel is three symbol. If the terminal device detects the second downlink control information, the second time offset of the time domain resource of the second downlink control information from the terminal device repeatedly transmitting the time domain resource of the first uplink data channel in the uplink data channel is three symbol.
  • the uplink data channel is repeatedly sent according to the second offset, that is, if the terminal device detects the first downlink control information, the terminal device repeatedly sends the fourth symbol.
  • the uplink data channel if the terminal device detects the second downlink control information, the terminal device repeatedly transmits the uplink data channel from the fifth symbol.
  • the access network device starts blindly checking the uplink data channel in the third symbol, so that the access network device can detect the uplink data channel in time regardless of when the terminal device detects the downlink control channel.
  • the access network device may further send, to the terminal device, indication information for acquiring the first offset and/or the second offset.
  • the terminal device may further receive indication information for acquiring the first offset and/or the second offset sent by the access network device; the terminal device acquires the first offset and/or the second offset according to the indication information. .
  • the terminal device After the terminal device detects the downlink control channel, if the second offset is greater than or equal to the first offset, the terminal device may repeatedly send the uplink data channel according to the second offset; if the second offset is smaller than the first The offset, the terminal device can repeatedly send the uplink data channel according to the first offset.
  • the indication information may be configured by a high layer, that is, the indication information may be included in the configuration information and sent to the terminal device.
  • the configuration information may include at least one of the following: the indication information used to obtain the downlink control channel resource set, the indication information used to obtain whether the downlink control channel is repeatedly sent, and the indication used to obtain the number of times the downlink control channel is repeatedly sent.
  • the information is used to obtain indication information of a starting position in the time domain when the downlink control channel is repeatedly transmitted.
  • the terminal device can acquire the first offset and/or the second offset in time, and determine the time domain of the uplink data channel according to the first offset and/or the second offset. Resources.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring the first offset and/or the second offset.
  • the terminal device After detecting the downlink control channel, the terminal device obtains indication information for acquiring the first offset and/or the second offset from the downlink control information carried by the downlink control channel, and acquires the first offset according to the indication information. A quantity and / or a second offset. And if the second offset is greater than or equal to the first offset, the terminal device may repeatedly send the uplink data channel according to the second offset; if the second offset is less than the first offset, the terminal device may The first offset repeatedly transmits the uplink data channel.
  • the terminal device can acquire the first offset and/or the second offset in time, and determine the time domain of the uplink data channel according to the first offset and/or the second offset. Resources.
  • the indication information includes: a first time domain resource that allows the terminal device to repeatedly send the uplink data channel, and a correspondence between the offset of the time domain resource that firstly sends the downlink control channel and the aggregation level, and/or the indication information includes detection.
  • a specific implementation manner in which the terminal device acquires the first offset and/or the second offset according to the indication information includes:
  • the target aggregation level is an aggregation level at which the downlink control channel is currently detected;
  • the terminal device repeatedly transmits the correspondence between the offset of the time domain resource of the first uplink data channel and the aggregation level of the first uplink data channel in the uplink data channel according to the detected time domain resource of the downlink control channel, and obtains the correspondence between the target aggregation level The second offset.
  • the correspondence between the offset of the time domain resource that the terminal device repeatedly transmits the uplink data channel and the time domain resource that first transmits the downlink control channel and the aggregation level are: the offset 1 corresponds to the aggregation level 1, and the offset The quantity 2 corresponds to the aggregation level 2.
  • the corresponding relationship between the detected time domain resource of the downlink control channel and the offset of the time domain resource of the uplink data channel sent by the terminal device and the aggregation level includes: the offset 3 corresponds to the aggregation level 1, and the offset 4 corresponds to Aggregation level 2. If the target aggregation level is aggregation level 1, the first offset is offset 1 and the second offset is offset 3.
  • a smaller offset can be set corresponding to a larger aggregation level, and a larger offset corresponds to a smaller aggregation level.
  • the target offset can be flexibly configured, which is advantageous for reducing the delay of service transmission.
  • the access network device may not send the indication information for acquiring the first offset and/or the second offset to the terminal device.
  • the terminal device may obtain the first correspondence corresponding to the target aggregation level according to the pre-stored time domain resource distance of the earliest allowed terminal device to repeatedly send the uplink data channel, and the corresponding relationship between the offset of the time domain resource of the downlink control channel and the aggregation level.
  • the target aggregation level is the aggregation level of the downlink control channel currently detected; and/or, the terminal device may repeatedly send the uplink data channel according to the pre-stored time domain resource of the detected downlink control channel. And sending a correspondence between the offset of the time domain resource of the uplink data channel and the aggregation level, and acquiring a second offset corresponding to the target aggregation level.
  • the access network device does not send the indication information for acquiring the first offset and/or the second offset to the terminal device, and the terminal device may determine the first offset and/or the second Offset, which helps to save transmission resources.
  • the indication information that is sent by the access network device to the terminal device for acquiring the first offset and/or the second offset may be A first offset and/or a second offset are included. That is to say, the access network device directly informs the terminal device of the specific first offset and/or the second offset. For example, after the access network device determines the aggregation level of the downlink control channel that is currently delivered, the time domain resource that is the earliest allowed terminal device that is pre-stored by the access network device to repeatedly transmit the time domain resource of the uplink data channel may be used to first transmit the time domain resource of the downlink control channel.
  • the first offset corresponding to the aggregation level of the downlink control channel that is currently delivered is obtained by the mapping between the offset and the aggregation level.
  • the access network device may repeatedly send the correspondence between the offset of the time domain resource of the first uplink data channel and the aggregation level of the first uplink data channel in the uplink data channel according to the pre-stored time domain resource of the detected downlink control channel. Obtaining a second offset corresponding to an aggregation level of the downlink control channel that is currently delivered.
  • the access network device sends the first offset and/or the second offset to the terminal device through the configuration information or to the terminal device through the downlink control information.
  • the repeated transmission of the downlink control channel may not be the same downlink control channel that is continuously transmitted.
  • the downlink control channels sent twice may be invalid.
  • the invalid subframe here may be a subframe for uplink transmission, or a multicast broadcast single frequency network (MBSFN) subframe, or a subframe for different frequency measurement.
  • MMSFN multicast broadcast single frequency network
  • the uplink data channel repeatedly transmitted by the terminal device may not be the same uplink data channel continuously transmitted.
  • an invalid subframe may be included between uplink data channels transmitted twice.
  • the invalid subframe is a downlink subframe, or a subframe used for communication between the terminal and the terminal, and the like. That is to say, FIG. 13 and FIG. 14 are examples in which the same uplink data channel is continuously transmitted, and the uplink data channels in FIG. 13 and FIG. 14 may not be continuously transmitted.
  • the embodiment of the present invention may divide the functional unit into the device according to the foregoing method example.
  • each functional unit may be divided according to each function, or two or more functions may be integrated into one 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.
  • the present invention provides an access network device.
  • the access network device may be the access network device shown in FIG. 3 in the foregoing method embodiment.
  • the access network device includes: a communication module. among them:
  • a communication module configured to repeatedly send a downlink control channel to the terminal device, where the downlink control channel is used for scheduling transmission of the downlink data channel, and the communication module is further configured to repeatedly send the downlink data channel to the terminal device, where the downlink data channel is first transmitted on the downlink control channel. After the first transmission, and the downlink data channel is transmitted for the first time no later than the last transmission of the downlink control channel.
  • the communication module is further configured to send, to the terminal device, indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time, and the time domain resource for transmitting the downlink control channel for the first time.
  • the target offset is a time domain resource for transmitting the downlink data channel for the first time, and the time domain resource for transmitting the downlink control channel for the first time. The offset.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time and a time domain resource for transmitting the downlink control channel for the first time. Transfer amount.
  • the indication information includes a correspondence between the offset and the aggregation level.
  • the present invention provides a terminal device.
  • the terminal device may be the terminal device shown in FIG. 3 in the foregoing method embodiment.
  • the terminal device includes: a processing module. among them:
  • the processing module is configured to detect a downlink control channel that is repeatedly sent by the access network device, where the downlink control channel is used for scheduling transmission of the downlink data channel, and the processing module is further configured to detect a downlink data channel and a downlink data channel that are repeatedly sent by the access network device.
  • the first transmission is after the first transmission of the downlink control channel, and the downlink data channel is transmitted for the first time no later than the last transmission of the downlink control channel.
  • the processing module is further configured to obtain, according to a correspondence between the pre-stored offset and the aggregation level, a target offset corresponding to the target aggregation level, where the target aggregation level is an aggregation level of the downlink control channel currently detected.
  • the target offset is the offset of the time domain resource of the first transmission downlink data channel from the time domain resource for the first transmission of the downlink control channel; the manner in which the processing module detects the downlink data channel repeatedly sent by the access network device is specifically: the processing module is based on The target offset, after detecting the downlink control channel, detects the downlink data channel.
  • the terminal device further includes a communication module, and the communication module is configured to receive, by the access network device, indication information for acquiring a target offset, where the target offset is the first time domain resource distance for transmitting the downlink data channel for the first time. Transmitting an offset of a time domain resource of the downlink control channel; the processing module is further configured to obtain a target offset according to the indication information; and the manner in which the processing module detects the downlink data channel repeatedly sent by the access network device is specifically: the processing module is configured according to the target The offset, after detecting the downlink control channel, detects the downlink data channel.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time and a time domain resource for transmitting the downlink control channel for the first time.
  • the processing module is further configured to obtain a target offset according to the indication information; the manner in which the processing module detects the downlink data channel repeatedly sent by the access network device is specifically: the processing module detects the downlink control channel according to the target offset After that, the downlink data channel is detected.
  • the indication information includes a correspondence between the offset and the aggregation level.
  • the manner in which the processing module obtains the target offset according to the indication information is specifically: the processing module is configured according to the offset between the indication information and the aggregation level. Corresponding relationship, the target offset corresponding to the target aggregation level is obtained, and the target aggregation level is the aggregation level of the downlink control channel currently detected.
  • the present invention provides another access network device.
  • the access network device may be the access network device shown in FIG. 9 in the foregoing method embodiment.
  • the access network device includes: a communication module. among them:
  • the domain resource includes a time domain resource that sends multiple downlink control channels.
  • the communication module is further configured to send, to the terminal device, indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time, and the time domain resource for transmitting the downlink control channel for the first time. Offset.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time and a time domain resource for transmitting the downlink control channel for the first time. Transfer amount.
  • the indication information includes a correspondence between the offset and the aggregation level.
  • the present invention provides yet another terminal device.
  • the terminal device may be the terminal device shown in FIG. 9 in the foregoing method embodiment.
  • the terminal device includes: a processing module. among them:
  • the processing module is configured to detect a downlink control channel that is repeatedly sent by the access network device, where the downlink control channel is used for scheduling transmission of the downlink data channel, and the processing module is further configured to detect a downlink data channel repeatedly sent by the access network device, at least for the first time.
  • the time domain resources of the downlink data channel include time domain resources for transmitting multiple downlink control channels.
  • the processing module is further configured to obtain, according to a correspondence between the pre-stored offset and the aggregation level, a target offset corresponding to the target aggregation level, where the target aggregation level is an aggregation level of the downlink control channel currently detected.
  • the target offset is the offset of the time domain resource of the first transmission downlink data channel from the time domain resource for the first transmission of the downlink control channel; the manner in which the processing module detects the downlink data channel repeatedly sent by the access network device is specifically: the processing module is based on The target offset, after detecting the downlink control channel, detects the downlink data channel.
  • the terminal device further includes a communication module, and the communication module is configured to receive, by the access network device, indication information for acquiring a target offset, where the target offset is the first time domain resource distance for transmitting the downlink data channel for the first time. Transmitting an offset of a time domain resource of the downlink control channel; the processing module is further configured to obtain a target offset according to the indication information; and the manner in which the processing module detects the downlink data channel repeatedly sent by the access network device is specifically: the processing module is configured according to the target The offset, after detecting the downlink control channel, detects the downlink data channel.
  • the downlink control information carried by the downlink control channel includes indication information for acquiring a target offset, where the target offset is a time domain resource for transmitting the downlink data channel for the first time and a time domain resource for transmitting the downlink control channel for the first time.
  • the processing module is further configured to obtain a target offset according to the indication information; the manner in which the processing module detects the downlink data channel repeatedly sent by the access network device is specifically: the processing module detects the downlink control channel according to the target offset After that, the downlink data channel is detected.
  • the indication information includes a correspondence between the offset and the aggregation level.
  • the manner in which the processing module obtains the target offset according to the indication information is specifically: the processing module is configured according to the offset between the indication information and the aggregation level. Corresponding relationship, the target offset corresponding to the target aggregation level is obtained, and the target aggregation level is the aggregation level of the downlink control channel currently detected.
  • FIG. 15 is still another access network device provided by the implementation of the present invention.
  • the access network device may be the access network device shown in FIG. 12 in the foregoing method embodiment.
  • the access network device includes a communication module 1501 and a processing module 1502. among them:
  • the communication module 1501 is configured to repeatedly send a downlink control channel to the terminal device, where the downlink control channel is used for scheduling transmission of the uplink data channel, and the processing module 1502 is configured to detect, at the first time, the uplink data channel repeatedly sent by the terminal device, the first moment For the time when the terminal device is allowed to repeatedly transmit the uplink data channel, the offset of the first time interval from the time domain resource for transmitting the downlink control channel is the first offset, and the communication module 1501 first receives the uplink data channel repeatedly transmitted by the terminal device. The moment is not earlier than the first moment.
  • the time domain resource of the downlink control channel detected by the terminal device and the time domain resource of the first uplink data channel sent by the terminal device repeatedly transmitting the uplink data channel have a second offset; the first offset and the second offset The offset is used by the terminal device to repeatedly send the uplink data channel according to the second offset if the second offset is greater than or equal to the first offset after detecting the downlink control channel; if the second offset is less than The first offset, the uplink data channel is repeatedly transmitted according to the first offset.
  • FIG. 16 is still another terminal device provided by the implementation of the present invention.
  • the terminal device may be the terminal device shown in FIG. 12 in the foregoing method embodiment.
  • the terminal device includes a communication module 1601 and a processing module 1602. among them:
  • the processing module 1602 is configured to detect a downlink control channel that is repeatedly sent by the access network device, where the downlink control channel is used to schedule transmission of the uplink data channel, and the communication module 1601 is configured to: after the processing module 1602 detects the downlink control channel, The network device repeatedly sends the uplink data channel, and the time when the communication module 1601 first transmits the uplink data channel is not earlier than the first time, and the first time is the time when the terminal device is allowed to repeatedly send the uplink data channel, and the first time distance is sent to the downlink control channel for the first time.
  • the offset of the time domain resource is the first offset.
  • the time domain resource of the downlink control channel detected by the processing module 1602 and the time domain resource of the first sending uplink data channel in the uplink data channel repeatedly sent by the communication module 1601 have a second offset; the communication module 1601 accesses
  • the method for the network device to repeatedly send the uplink data channel is specifically: if the second offset is greater than or equal to the first offset, the uplink data channel is repeatedly sent according to the second offset; if the second offset is smaller than the first offset When the amount is shifted, the uplink data channel is repeatedly transmitted according to the first offset.
  • FIG. 17 is a schematic structural diagram of an access network device according to an embodiment of the present application.
  • the access network device may be the access network device shown in FIG. 3, FIG. 6, or FIG. 9 or FIG. 12 in the foregoing method embodiment.
  • the access network device 1700 includes a processor 1701, a memory 1702, and a communication interface 1703.
  • the processor 1701, the memory 1702, and the communication interface 1703 are connected.
  • the processor 1701 may be a central processing unit (CPU), a general-purpose processor, a coprocessor, a digital signal processor (DSP), or an application-specific integrated circuit (ASIC). , field programmable gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof.
  • the processor 1701 can also be a combination of computing functions, such as one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication interface 1703 is configured to implement communication with other network elements, such as terminal devices.
  • the processor 1701 invokes the program code stored in the memory 1702 to perform the steps performed by the access network device described in FIG. 3, FIG. 6, FIG. 9, or FIG. 12 in the foregoing method embodiment.
  • FIG. 18 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the terminal device may be the terminal device shown in FIG. 3, FIG. 6, or FIG. 9 or FIG. 12 in the foregoing method embodiment.
  • the terminal device 1800 includes a processor 1801, a memory 1802, and a communication interface 1803.
  • the processor 1801, the memory 1802, and the communication interface 1803 are connected.
  • the processor 1801 may be a central processing unit (CPU), a general-purpose processor, a coprocessor, a digital signal processor (DSP), or an application-specific integrated circuit (ASIC). , field programmable gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof.
  • the processor 1801 can also be a combination of computing functions, such as one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication interface 1803 is configured to implement communication with other network elements, such as an access network device.
  • the processor 1801 invokes the program code stored in the memory 1802 to perform the steps performed by the terminal device described in FIG. 3, FIG. 6, FIG. 9, or FIG. 12 in the foregoing method embodiment.
  • each device provided in the embodiment of the present application is similar to the method embodiment of the present application. Therefore, the implementation of each device may refer to the implementation of the method, and is not described here.

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Abstract

本申请实施例公开了一种通信方法及相关设备，其中，该方法包括：接入网设备向终端设备重复发送下行控制信道，下行控制信道用于调度下行数据信道的发送；接入网设备向终端设备重复发送下行数据信道，下行数据信道首次传输在下行控制信道首次传输之后，并且下行数据信道首次传输不晚于下行控制信道最后一次传输。可见，通过实施本申请实施例，在保证业务可靠性的同时，也可保证业务的低时延。

Description

一种通信方法及相关设备
本申请要求于2017年06月08日提交中国专利局、申请号为201710425785.0、发明名称为“一种通信方法及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及相关设备。
背景技术
移动通信技术已经深刻地改变了人们的生活，但人们对更高性能的移动通信技术的追求从未停止。为了应对未来爆炸性的移动数据流量增长、海量移动通信的设备连接、不断涌现的各类新业务和应用场景，第五代(the fifth generation，5G)移动通信系统应运而生。国际电信联盟(international telecommunication union，ITU)为5G以及未来的移动通信系统定义了三大类应用场景：增强型移动宽带(enhanced mobile broadband，eMBB)、高可靠低时延通信(ultra reliable and low latency communications，URLLC)以及海量机器类通信(massive machine type communications，mMTC)。
其中，典型的URLLC业务有：工业制造或生产流程中的无线控制、无人驾驶汽车和无人驾驶飞机的运动控制以及远程修理、远程手术等触觉交互类应用。这些业务的主要特点是要求超高可靠性和低延时。例如，该场景下要求空口数据在1毫秒的传输时延内达到99.999％的可靠性传输。
一般情况下，为了保证端到端业务时延短，业务的可靠性不高；为了保证端到端业务的高可靠性，端到端业务时延可能比较长。但对于URLLC业务，既要保证可靠性，又要保证短时延。因此，如何实现同时保证可靠性和短时延是目前亟待解决的问题。
发明内容
本申请实施例提供了一种通信方法及相关设备，有利于同时保证业务的可靠性和短时延。
第一方面，本申请实施例提供了一种通信方法，该方法包括：
接入网设备向终端设备重复发送下行控制信道，下行控制信道用于调度下行数据信道的发送；接入网设备向终端设备重复发送下行数据信道，下行数据信道首次传输在下行控制信道首次传输之后，并且下行数据信道首次传输不晚于下行控制信道最后一次传输。
可见，通过实施第一方面所描述的方法，有利于终端设备快速地检测出下行数据信道，有利于终端在所有下行控制信道都接收完毕之前，检测到下行数据信道，在保证业务可靠性的同时，也可保证业务的低时延。
可选的，接入网设备向终端设备发送用于获取目标偏移量的指示信息，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。
可见，通过实施该实施方式，有利于终端设备及时地获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和 频域资源及时地检测出下行数据信道。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。
可见，通过实施该实施方式，有利于终端设备及时地获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源及时地检测出下行数据信道。
可选的，指示信息包括偏移量与聚合等级之间的对应关系。
通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
可选的，接入网设备向终端设备发送的用于获取目标偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)可以包括目标偏移量。也即是说，接入网设备直接将具体的目标偏移量告诉终端设备。例如，接入网设备确定当前下发的下行控制信道的聚合等级之后，可根据接入网设备预存的偏移量与聚合等级之间的对应关系，获取目标偏移量，该目标偏移量为当前下发的下行控制信道的聚合等级对应的偏移量。接入网设备将目标偏移量通过配置信息发送至终端设备或通过下行控制信息发送至终端设备。通过实施该实施方式，可减少终端设备的工作量，节省终端设备的CPU资源。
第二方面，本申请实施例提供了一种通信方法，该方法包括：
终端设备检测接入网设备重复发送的下行控制信道，下行控制信道用于调度下行数据信道的发送；终端设备检测接入网设备重复发送的下行数据信道，下行数据信道首次传输在下行控制信道首次传输之后，并且下行数据信道首次传输不晚于下行控制信道的最后一次传输。
由于下行数据信道首次传输在下行控制信道首次传输之后，并且下行数据信道首次传输不晚于下行控制信道的最后一次传输，终端设备可在所有下行控制信道都接收完毕之前，检测到下行数据信道，在保证业务可靠性的同时，也可保证业务的低时延。
可选的，终端设备还可根据预存的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；终端设备检测接入网设备重复发送的下行数据信道的具体实施方式可以为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
通过实施该实施方式，接入网设备不向终端设备发送用于获取目标偏移量的指示信息，终端设备就可确定目标偏移量，这样有利于节省传输资源。
可选的，终端设备还可接收接入网设备发送的用于获取目标偏移量的指示信息，并根据指示信息获取目标偏移量，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；终端设备检测接入网设备重复发送的下行数据信道的具体实施方式可以为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可见，通过实施该实施方式，终端设备可及时地获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域 资源及时地检测出下行数据信道。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；终端设备还可根据指示信息获取目标偏移量；终端设备检测接入网设备重复发送的下行数据信道的具体实施方式可以为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可见，通过实施该实施方式，终端设备可及时地获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源及时地检测出下行数据信道。
可选的，指示信息包括偏移量与聚合等级之间的对应关系；终端设备根据指示信息获取目标偏移量的具体实施方式可以为：终端设备根据指示信息包括的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，该目标聚合等级为当前检测到下行控制信道的聚合等级。通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
第三方面，本申请实施例提供了一种通信方法，该方法包括：
接入网设备向终端设备重复发送下行控制信道，下行控制信道用于调度下行数据信道的发送；接入网设备向终端设备重复发送下行数据信道，至少首次发送的下行数据信道的时域资源包括发送多次下行控制信道的时域资源。
可见，通过实施第三方面所描述的方法，有利于终端设备快速地检测到下行数据信道，在保证业务可靠性的同时，也可保证低时延。
可选的，接入网设备向终端设备发送用于获取目标偏移量的指示信息，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。
可见，通过实施该实施方式，有利于终端设备及时地获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源及时地检测出下行数据信道。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。
可见，通过实施该实施方式，有利于终端设备及时地获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源及时地检测出下行数据信道。
可选的，指示信息包括偏移量与聚合等级之间的对应关系。
通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
可选的，接入网设备向终端设备发送的用于获取目标偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)可以包括目标偏移量。也即是说，接入网设备直接将具体的目标偏移量告诉终端设备。例如，接入网设备确定当前下发的下行控制信道的聚合等级之后，可根据接入网设备预存的偏移量与聚合等级之间的对应关系，获取目标偏移量，该目标偏移量为当前下发的下行控制信道的聚合等级对应的偏移量。接 入网设备将目标偏移量通过配置信息发送至终端设备或通过下行控制信息发送至终端设备。通过实施该实施方式，可减少终端设备的工作量，节省终端设备的CPU资源。
第四方面，本申请实施例提供了一种通信方法，该方法包括：
终端设备检测接入网设备重复发送的下行控制信道，下行控制信道用于调度下行数据信道的发送；终端设备检测接入网设备重复发送的下行数据信道，至少首次发送的下行数据信道的时域资源包括发送多次下行控制信道的时域资源。
可见，通过实施第四方面所描述的方法，有利于终端设备快速地检测到下行数据信道，在保证业务可靠性的同时，也可保证低时延。
可选的，终端设备还可根据预存的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，该目标聚合等级为当前检测到下行控制信道的聚合等级，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；终端设备检测接入网设备重复发送的下行数据信道的具体实施方式可以为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
通过实施该实施方式，接入网设备不向终端设备发送用于获取目标偏移量的指示信息，终端设备就可确定目标偏移量，这样有利于节省传输资源。
可选的，终端设备还可接收接入网设备发送的用于获取目标偏移量的指示信息，并根据指示信息获取目标偏移量，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；终端设备检测接入网设备重复发送的下行数据信道的具体实施方式可以为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可见，通过实施该实施方式，终端设备可及时地获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源及时地检测出下行数据信道。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；终端设备还可根据指示信息获取目标偏移量；终端设备检测接入网设备重复发送的下行数据信道的具体实施方式可以为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可见，通过实施该实施方式，终端设备可及时地获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源及时地检测出下行数据信道。
可选的，指示信息包括偏移量与聚合等级之间的对应关系；终端设备根据指示信息获取目标偏移量的具体实施方式可以为：终端设备根据指示信息包括的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级。通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
第五方面，本申请实施例提供了一种通信方法，该方法包括：
接入网设备向终端设备重复发送下行控制信道，下行控制信道用于调度上行数据信 道的发送；接入网设备在第一时刻检测终端设备重复发送的上行数据信道，该第一时刻为最早允许终端设备重复发送上行数据信道的时刻，该第一时刻距离首次发送下行控制信道的时域资源的偏移量为第一偏移量，接入网设备首次接收终端设备重复发送的上行数据信道的时刻不早于第一时刻。
由于最早允许终端设备重复发送上行数据信道的时刻不晚于接入网设备接收上行数据信道的实际时刻，因此接入网设备可及时地检测出上行数据信道。因此，通过实施第五方面所描述的方法有利于在保证业务的可靠性的同时保证短时延。
可选的，终端设备检测出的下行控制信道的时域资源与终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源具有第二偏移量；第一偏移量和第二偏移量用于终端设备在检测到下行控制信道之后，若第二偏移量大于或等于第一偏移量，则根据第二偏移量重复发送上行数据信道；若第二偏移量小于第一偏移量，则根据第一偏移量重复发送上行数据信道。
通过实施该实施方式无论终端设备在何时检测到下行控制信道，接入网设备都可及时检测到上行数据信道。
可选的，接入网设备还可向终端设备发送用于获取第一偏移量的指示信息和/或第二偏移量的指示信息。
可见，通过实施该实施方式，终端设备可及时获取到第一偏移量和/或第二偏移量，并根据第一偏移量和/或第二偏移量确定上行数据信道的时域资源。
可选的，下行控制信道承载的下行控制信息包括用于获取第一偏移量和/或第二偏移量的指示信息。
可见，通过实施该实施方式，终端设备可及时获取到第一偏移量和/或第二偏移量，并根据第一偏移量和/或第二偏移量确定上行数据信道的时域资源。
可选的，指示信息包括最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，和/或指示信息包括检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系。
可见，通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
可选的，接入网设备向终端设备发送的用于获取第一偏移量和/或第二偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)可以包括第一偏移量和/或第二偏移量。也即是说，接入网设备直接将具体的第一偏移量和/或第二偏移量告诉终端设备。例如，接入网设备确定当前下发的下行控制信道的聚合等级之后，可根据接入网设备预存的最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，获取当前下发的下行控制信道的聚合等级对应的第一偏移量。接入网设备可根据预存的检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系，获取当前下发的下行控制信道的聚合等级对应的第二偏移量。接入网设备将第一偏移量和/或第二偏移量通过配置信息发送至终端设备或通过下行控制信 息发送至终端设备。通过实施该实施方式，可减少终端设备的工作量，节省终端设备的CPU资源。
第六方面，本申请实施例提供了一种通信方法，该方法包括：
终端设备检测接入网设备重复发送的下行控制信道，该下行控制信道用于调度上行数据信道的发送；终端设备检测到下行控制信道之后，向接入网设备重复发送上行数据信道，终端设备首次发送上行数据信道的时刻不早于第一时刻，该第一时刻为最早允许终端设备重复发送上行数据信道的时刻，第一时刻距离首次发送下行控制信道的时域资源的偏移量为第一偏移量。
由于终端设备首次发送上行数据信道的时刻不早于第一时刻，因此接入网设备在第一时刻检测上行数据信道，可及时地检测出上行数据信道。因此，通过实施第六方面所描述的方法有利于在保证业务的可靠性的同时保证短时延。
可选的，终端设备检测出的下行控制信道的时域资源与终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源具有第二偏移量；终端设备向接入网设备重复发送上行数据信道的具体实施方式可以为：若第二偏移量大于或等于第一偏移量，则根据第二偏移量重复发送上行数据信道；若第二偏移量小于第一偏移量，则根据第一偏移量重复发送上行数据信道。
通过实施该实施方式无论终端设备在何时检测到下行控制信道，接入网设备都可及时检测到上行数据信道。
可选的，终端设备还可接收接入网设备发送的用于获取第一偏移量和/或第二偏移量的指示信息，并根据指示信息获取第一偏移量和/或第二偏移量。
可见，通过实施该实施方式，终端设备可及时获取到第一偏移量和/或第二偏移量，并根据第一偏移量和/或第二偏移量确定上行数据信道的时域资源。
可选的，下行控制信道承载的下行控制信息包括用于获取第一偏移量和/或第二偏移量的指示信息；终端设备还可根据指示信息获取第一偏移量和/或第二偏移量。
可见，通过实施该实施方式，终端设备可及时获取到第一偏移量和/或第二偏移量，并根据第一偏移量和/或第二偏移量确定上行数据信道的时域资源。
可选的，指示信息包括最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，和/或指示信息包括检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系；终端设备根据指示信息获取第一偏移量和/或第二偏移量的具体实施方式包括：终端设备根据最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的第一偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级；和/或终端设备根据检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的第二偏移量。
可见，通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
可选的，终端设备可根据预存的最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的第一偏移量，该目标聚合等级为当前检测到下行控制信道的聚合等级；和/或，终端设备可根据预存的检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的第二偏移量。
通过实施该实施方式，接入网设备不向终端设备发送用于获取第一偏移量和/或第二偏移量的指示信息，终端设备就可确定第一偏移量和/或第二偏移量，这样有利于节省传输资源。
可选的，终端设备接收的由接入网设备发送的用于获取第一偏移量和/或第二偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)可以包括第一偏移量和/或第二偏移量。也即是说，接入网设备直接将具体的第一偏移量和/或第二偏移量告诉终端设备。例如，接入网设备确定当前下发的下行控制信道的聚合等级之后，可根据接入网设备预存的最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，获取当前下发的下行控制信道的聚合等级对应的第一偏移量。接入网设备可根据预存的检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系，获取当前下发的下行控制信道的聚合等级对应的第二偏移量。接入网设备将第一偏移量和/或第二偏移量通过配置信息发送至终端设备或通过下行控制信息发送至终端设备。通过实施该实施方式，可减少终端设备的工作量，节省终端设备的CPU资源。
第七方面，提供了一种接入网设备，该接入网设备可执行上述第一方面、第三方面、第五方面、第一方面可能的实现方式、第三方面可能的实现方式或第五方面可能的实现方式中的方法。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的单元。该单元可以是软件和/或硬件。基于同一发明构思，该接入网设备解决问题的原理以及有益效果可以参见上述第一方面、第三方面、第五方面、第一方面可能的实现方式、第三方面可能的实现方式或第五方面可能的实现方式以及有益效果，重复之处不再赘述。
第八方面，提供了一种终端设备，该终端设备可执行上述第二方面、第四方面、第六方面、第二方面可能的实现方式、第四方面可能的实现方式或第六方面可能的实现方式中的方法。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的单元。该单元可以是软件和/或硬件。基于同一发明构思，该终端设备解决问题的原理以及有益效果可以参见上述第二方面、第四方面、第六方面、第二方面可能的实现方式、第四方面可能的实现方式或第六方面可能的实现方式以及有益效果，重复之处不再赘述。
第九方面，提供了一种接入网设备，该接入网设备包括：处理器、存储器、通信接口以及一个或多个程序；处理器、通信接口和存储器相连；其中，一个或多个程序被存储在存储器中，该处理器调用存储在该存储器中的程序以实现上述第一方面、第三方面、第 五方面、第一方面可能的实现方式、第三方面可能的实现方式或第五方面可能的实现方式中的方案，该接入网设备解决问题的实施方式以及有益效果可以参见上述第一方面、第三方面、第五方面、第一方面可能的实现方式、第三方面可能的实现方式或第五方面可能的实现方式以及有益效果，重复之处不再赘述。
第十方面，提供了一种终端设备，该终端设备包括：处理器、存储器、通信接口以及一个或多个程序；处理器、通信接口和存储器相连；其中，一个或多个程序被存储在存储器中，该处理器调用存储在该存储器中的程序以实现上述第二方面、第四方面、第六方面、第二方面可能的实现方式、第四方面可能的实现方式或第六方面可能的实现方式中的方案，该终端设备解决问题的实施方式以及有益效果可以参见上述第二方面、第四方面、第六方面、第二方面可能的实现方式、第四方面可能的实现方式或第六方面可能的实现方式以及有益效果，重复之处不再赘述。
第十一方面，提供了一种计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面～第六方面中任一方面的方法或第一方面～第六方面任一方法的任意可选的实现方式。
附图说明
图1是现有的一种通信系统的示意图；
图2是现有的一种下行控制信道和下行数据信道传输的示意图；
图3是本申请实施例提供的一种通信方法的流程示意图；
图4是本申请实施例提供的一种下行控制信道和下行数据信道传输的示意图；
图5是本申请实施例提供的另一种下行控制信道和下行数据信道传输的示意图；
图6是本申请实施例提供的另一种通信方法的流程示意图；
图7和图8是本申请实施例提供的下行控制信道和下行数据信道传输的示意图；
图9是本申请实施例提供的又一种通信方法的流程示意图；
图10和图11是本申请实施例提供的下行控制信道和下行数据信道传输的示意图；
图12是本申请实施例提供的又一种通信方法的流程示意图；
图13和图14是本申请实施例提供的下行控制信道和上行数据信道传输的示意图；
图15是本申请实施例提供的一种接入网设备的结构示意图；
图16是本申请实施例提供的一种终端设备的结构示意图；
图17是本申请实施例提供的另一种接入网设备的结构示意图；
图18是本申请实施例提供的另一种终端设备的结构示意图。
具体实施方式
下面结合附图对本申请具体实施例作进一步的详细描述。
为了能够更好地理解本申请实施例，下面对本申请实施例可应用的通信系统进行说明。
图1是本申请实施例提供的一种通信系统的示意图。如图1所示，该通信系统包括接入网设备和一个或多个终端设备，接入网设备可以与终端设备通信。图1以接入网设备 与两个终端设备通信为例，可以理解，接入网设备可以与任意数目的终端设备通信。
此外，该通信系统可以是公共陆地移动网络(public land mobile network，PLMN)网络或者D2D(mevice to mevice)网络或者M2M(machine to machine)网络或者其他网络，图1只是举例的简化示意图，网络中还可以包括其他接入网设备，图1中未予以画出。
可选地，在本申请中，该接入网设备可以是与终端设备进行通信的设备，例如，接入网设备控制器等。每个接入网设备可以为特定的地理区域提供通信覆盖，并且可以与位于所述覆盖区域(小区)内的终端设备(例如UE)进行通信，接入网设备可以支持不同制式的通信协议，或者可以支持不同的通信模式。例如，接入网设备可以是GSM系统或CDMA系统中的接入网设备(base transceiver station，BTS)，也可以是WCDMA系统中的接入网设备(NodeB，NB)，还可以是LTE系统中的演进型接入网设备(evolutional node B，eNB或eNodeB)，或者是云无线网络(cloud radio access network，CRAN)中的无线控制器，或者所述接入网设备可以为未来5G网络中的接入网设备，如gNB或小站、微站，TRP(transmission reception point，传输接收点)，还可以是中继站、接入点或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的接入网设备等。
可选地，在本申请中，终端设备可以指接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动终端、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、物联网中的终端设备、虚拟现实设备、未来5G网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
接入网设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和卫星上。本申请的实施例对接入网设备和终端设备的应用场景不做限定。
在现有的实际应用中，提高业务可靠性的方法，具体体现在，基站先重复发送下行控制信道若干次后，再重复发送下行数据信道。其中，下行控制信道用于调度下行数据信道的发送。如图2所示，基站连续在3个传输时间间隔内重复发送下行控制信道，从传输时间间隔n+4开始连续3个传输时间间隔内重复发送下行数据信道。也就是说，在传输时间间隔n～传输时间间隔n+2期间连续发送3个相同的下行控制信道，在传输时间间隔n+4～传输时间间隔n+6期间连续发送3个相同的下行数据信道。通过重复发送下行控制信道和下行数据信道来提高业务的可靠性。相应地，终端设备需要先检测下行控制信道，获得下行控制信息，再根据下行控制信息确定下行数据信道的频域资源。终端设备在下行数据信道的频域资源接收并检测下行数据信道。如图2所示，终端设备在传输时间间隔n、传输时间间隔n+1或传输时间间隔n+2中任意一个传输时间间隔检测到下行控制信道，都必须在传输时间间隔n+4才能开始接收并检测下行数据信道。可见这种方式时延较大。
然而，目前一些业务(例如，URLLC业务)要求超高可靠性和低延时。为此，本申请实施例提供了一种通信方法及相关设备，有利于同时保证业务的可靠性和短时延。
下面进一步对本申请所提供的通信方法及设备进行介绍。
请参见图3，图3是本申请实施例提供的通信方法。如图3所示，该通信方法包括如下301～304部分，其中：
301、接入网设备向终端设备重复发送下行控制信道。
本申请实施例中，下行控制信道用于调度下行数据信道的发送。接入网设备向终端设备至少发送两次下行控制信道，且每次发送的下行控制信道相同。
302、接入网设备向终端设备重复发送下行数据信道，该下行数据信道首次传输在下行控制信道首次传输之后，并且该下行数据信道首次传输不晚于下行控制信道最后一次传输。
本申请实施例中，也即是说，接入网设备向终端设备发送至少两次下行数据信道，且每次发送的下行数据信道相同。下行数据信道首次传输不晚于下行控制信道最后一次传输是指：下行数据信道首次传输的时间在下行控制信道最后一次传输的时间之前，或下行数据信道首次传输的时间等于下行控制信道最后一次传输的时间。
例如，如图4所示，接入网设备向终端设备发送四次下行控制信道，每次发送的下行控制信道相同，接入网设备向终端设备发送五次下行数据信道，每次发送的下行数据信道相同。图4以第一次发送下行数据信道的时间在第一次发送下行控制信道的时间之后，并且第一次发送下行数据信道的时间在最后一次发送下行控制信道的时间之前为例。
303、终端设备检测接入网设备重复发送的下行控制信道。
本申请实施例中，终端设备可检测301部分中接入网设备重复发送的下行控制信道。
304、终端设备检测接入网设备重复发送的下行数据信道。
本申请实施例中，终端设备检测到接入网设备发送的下行控制信道之后，可获取下行控制信道中的下行控制信息，并根据下行控制信息确定下行数据信道的频域资源，从而可在下行数据信道的频域资源检测接入网设备重复发送的下行数据信道。
举例来说，如图4所示，若下行控制信道和下行数据信道每次发送所使用的资源在时域上为一个正交频分复用(orthogonal frequency duplex multiplexing，OFDM)符号，则在第一个符号上检测到第一个下行控制信道，终端设备就可从第二个符号开始检测下行数据信道。若终端设备在第二个符号检测到第二个下行控制信道，则终端设备可在第三个符号开始检测下行数据信道，以此类推。或者，终端设备也可在检测下行控制信道时，将同时接收的所有数据都缓存起来。例如，终端设备在第二个符号检测第二个下行控制信道时，将同时接收到的下行控制信道和下行数据信道都缓存起来。在终端设备检测到第二个下行控制信道之后，根据下行控制信道承载的下行控制信息确定下行数据信道的频域资源。终端设备可根据下行数据信道的频域资源，从缓存的在第二个符号接收的数据中开始检测下行数据信道。接入网设备会配置给终端设备下行数据信道的总共发送次数。终端设备会从第二符号接收的数据中开始检测下行数据信道。若在第二符号接收的数据中未成功检测到下行数据信道，则可将后续符号接收的数据进行合并检测，直到下行数据信道被检测出来。
可见，通过实施图3所描述的方法，终端设备可快速地检测出下行数据信道，而不是在所有下行控制信道都接收完毕之后，才能检测到下行数据信道，在保证业务可靠性的 同时，也可保证业务的低时延。
可选的，下行控制信道每次发送所使用的资源在时域上可以是一个OFDM符号，一个时隙(包含若干个OFDM符号)，一个时隙中若干个符号，或者一个子帧(包含若干个时隙)。当下行控制信道每次发送所使用的资源在时域上是一个OFDM符号或时隙或时隙中若干个OFDM符号或子帧时，下行数据信道每发送一次所使用的资源在时域上不做限制，即可以是一个OFDM符号，可以是一个时隙，或者一个子帧，或者若干个时隙的聚合，或者若干个子帧的聚合等。
例如，如图4所示，下行控制信道和下行数据信道每次发送所使用的资源在时域上为一个OFDM符号或一个时隙或一个子帧。
再如，如图5所示，下行控制信道每次发送所使用的资源在时域上为一个OFDM符号，下行数据信道每次发送所使用的资源在时域上可以为两个OFDM符号。
可选的，如图6所示，接入网设备还可向终端设备发送用于获取目标偏移量的指示信息。其中，该目标偏移量为首次发送下行数据信道的时域资源距离首次下行控制信道的时域资源的偏移量。终端设备还可接收接入网设备发送的用于获取目标偏移量的指示信息。终端设备还可根据指示信息获取目标偏移量。终端设备检测接入网设备重复发送的下行数据信道的具体实施方式为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。可选的，该指示信息可以为高层配置的，即指示信息可包含于配置信息中发送至终端设备。可选的，配置信息还可包含以下至少一种：用于获取下行控制信道资源集合的指示信息，用于获得下行控制信道是否重复发送的指示信息，用于获得下行控制信道重复发送次数的指示信息，用于获得下行控制信道重复发送时时域上起始位置的指示信息，用于获得下行数据信道重复发送次数的指示信息。
接入网设备配置该目标偏移量时，配置的目标偏移量的取值可以为0，或在时域上至少为一次发送下行控制信道在时域上所占的时间，或至少为两次发送下行控制信道在时域上所占的时间，或者至少为三次发送下行控制信道在时域上所占的时间等等。
例如，在图4中，若下行控制信道和下行数据信道每次发送所使用的资源在时域上为一个OFDM符号，则目标偏移量为一个OFDM符号。若下行控制信道和下行数据信道每次发送所使用的资源在时域上为一个时隙，则目标偏移量为一个时隙。若下行控制信道和下行数据信道每次发送所使用的资源在时域上为一个子帧，则目标偏移量为一个子帧。
例如，在图5中，目标偏移量为一个OFDM符号。
在该实施方式中，具体地，终端设备在检测到下行控制信道之后，可获取下行控制信道承载的下行控制信息，并根据下行控制信息确定下行数据信道的频域资源。并且终端设备根据目标偏移量可确定下行数据信道的时域资源。例如，终端设备根据下行控制信道首次发送的时域资源和目标偏移量，就可确定下行数据信道发送的时域资源。终端设备根据下行数据信道的频域资源和时域资源就可开始检测下行数据信道。
可见，通过实施该实施方式，终端设备可及时获取到目标偏移量，并根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源及时地检测出下行数据信道。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息， 该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。终端设备检测到下行控制信道之后，就可从下行控制信息中获取指示信息，从而根据指示信息获取目标偏移量。终端设备根据目标偏移量确定下行数据信道的时域资源，并根据下行控制信息确定下行数据信道的频域资源，从而根据下行数据信道的时域资源和频域资源来检测下行数据信道。
可见，通过实施该实施方式，终端设备可根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源准确地检测出下行数据信道。
可选的，接入网设备向终端设备发送的用于获取目标偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)包括偏移量与聚合等级(aggregation level,AL)之间的对应关系。终端设备根据指示信息获取目标偏移量的具体实施方式可以为：终端设备根据指示信息包括的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级。
例如，指示信息包括偏移量1对应聚合等级1，偏移量2对应聚合等级2。若当前检测到的下行控制信道的聚合等级为聚合等级2，则目标偏移量为偏移量2。
下行控制信道发送时，可以使用多种聚合等级(aggregation level,AL)中的任意一种聚合等级发送。聚合等级越高，发送下行控制信道使用的时频资源越多，检测下行控制信道的可靠性越高。如果使用较高的聚合等级发送下行控制信道，终端设备检测出下行控制信息的概率越高，那么终端设备可能检测一次发送的下行控制信道后就能成功检测出下行控制信息。因此，聚合等级越高，第一次发送下行数据信道的时间距离第一次发送控制信道的时间的偏移量就不需要太长；如果使用的聚合等级较小，则第一次发送下行数据信道的时间距离第一次发送控制信道的时间的偏移量相对较长，如图7所示。
因此，可以设置较小的偏移量对应较大的聚合等级，较大的偏移量对应较小的聚合等级。例如，偏移量1(一个OFDM符号)对应聚合等级1(AL＝8)，偏移量2(两个OFDM符号)对应聚合等级2(AL＝2)。也即是说，偏移量1小于偏移量2，聚合等级1大于聚合等级2。可见，通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
可选的，终端设备根据预存的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，该目标聚合等级为当前检测到下行控制信道的聚合等级；终端设备检测接入网设备重复发送的下行数据信道的具体实施方式可以为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
在该实施方式中，接入网设备可以不用向终端设备发送用于获取目标偏移量的指示信息。终端设备自身存储有偏移量与聚合等级之间的对应关系。在终端设备检测到下行控制信道之后，可获得当前检测到的下行控制信道的聚合等级。终端设备获取与当前检测到的下行控制信道的聚合等级对应的目标偏移量。例如，终端设备预存有对应关系：偏移量1对应聚合等级1，偏移量2对应聚合等级2。若当前检测到的下行控制信道的聚合等级为聚合等级2，则目标偏移量为偏移量2。终端设备检测到下行控制信道之后，根据目标偏移量确定下行数据信道的时域资源，根据下行控制信道承载的下行控制信息确定下行数据信 道的频域资源。终端设备根据下行数据信道的时域资源和频域资源就可检测出下行数据信道。
通过实施该实施方式，接入网设备不向终端设备发送用于获取目标偏移量的指示信息，终端设备就可确定目标偏移量，这样有利于节省传输资源。
可选的，接入网设备向终端设备发送的用于获取目标偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)可以包括目标偏移量。也即是说，接入网设备直接将具体的目标偏移量告诉终端设备。例如，接入网设备确定当前下发的下行控制信道的聚合等级之后，可根据接入网设备预存的偏移量与聚合等级之间的对应关系，获取目标偏移量，该目标偏移量为当前下发的下行控制信道的聚合等级对应的偏移量。接入网设备将目标偏移量通过配置信息发送至终端设备或通过下行控制信息发送至终端设备。通过实施该实施方式，可减少终端设备的工作量，节省终端设备的CPU资源。
在现有的实际应用中，还存在一种用于提高业务可靠性的方法。具体体现在，接入网设备向终端设备重复发送下行控制信道和下行数据信道。如图8所示，传输时间间隔n～传输时间间隔n+2内的下行控制信道相同，下行数据信道也相同。下行控制信道用于调度下行数据信道的发送。
在图8中，下行控制信道在一个传输时间间隔内发送一次，下行数据信道在一个传输时间间隔内也发送一次。如果终端设备通过传输时间间隔n发送的下行控制信道不能成功检测出下行控制信息，则需要等到传输时间间隔n+1内检测下行控制信道。如果成功检测出传输时间间隔n+1内的下行控制信息，才能去检测下行数据信道。或者将传输时间间隔n+1内的下行控制信道和传输时间间隔n内的下行控制信道合并检测，如果成功检测出下行控制信息，才能去检测下行数据信道。然而在这两种方式下，都需要等待一个传输时间间隔长度加一个下行控制信道所占的时间长度才能检测下行数据信道，即需要检测出传输时间间隔n+1内的下行控制信息，才能检测下行数据信道。可见，这种用于提高业务可靠性的方法，导致业务时延较高。
为了同时保证业务的可靠性和短时延，本申请实施例还提供了一种通信方法及相关设备，下面进一步对本申请所提供的通信方法及设备进行介绍。
请参见图9，图9是本申请实施例提供的通信方法。如图9所示，该通信方法包括如下901～904部分，其中：
901、接入网设备向终端设备重复发送下行控制信道。
本申请实施例中，接入网设备向终端设备至少发送两次下行控制信道，且每次发送的下行控制信道相同。下行控制信道用于调度下行数据信道的发送。
902、接入网设备向终端设备重复发送下行数据信道，至少首次发送的下行数据信道的时域资源包括发送多次下行控制信道的时域资源。
本申请实施例中，接入网设备向终端设备发送至少两次下行数据信道，且每次发送的下行数据信道相同。
本申请实施例中，首次或前几次发送的下行数据信道中，每次发送的下行数据信道的时域资源包括发送多次下行控制信道的时域资源。或者，发送的所有下行数据信道中， 每次发送的下行数据信道的时域资源包括发送多次下行控制信道的时域资源。其中，至少首次发送的下行数据信道的时域资源包括发送多次下行控制信道的时域资源可以为：至少首次发送的下行数据信道的时域资源包括至少发送两次下行控制信道的时域资源，或至少发送三次下行控制信道的时域资源等等。
例如，如图10所示，接入网设备向终端设备发送五次下行控制信道，每次发送的下行控制信道相同，接入网设备向终端设备发送三次下行数据信道，每次发送的下行数据信道相同。首次发送的下行数据信道的时频资源包括两次下行控制信道的时域资源。第二次发送的下行数据信道的时频资源也包括两次下行控制信道的时域资源，第三次发送的下行数据信道的时频资源仅包括一次下行控制信道的时域资源。当然，第三次发送的下行数据信道的时频资源也可包括多次下行控制信道的时域资源。
可选的，一个传输时间间隔可以为一个时隙，一个迷你时隙，一个子帧，若干个符号的聚合，若干个时隙的聚合，若干个迷你时隙的聚合，或者若干个子帧的聚合等，本申请实施例不做限定。
903、终端设备检测接入网设备重复发送的下行控制信道。
本申请实施例中，终端设备可检测901部分中接入网设备重复发送的下行控制信道。
904、终端设备检测接入网设备重复发送的下行数据信道。
本申请实施例中，终端设备检测到接入网设备发送的下行控制信道之后，可获取下行控制信道中的下行控制信息，并根据下行控制信息确定下行数据信道的频域资源，从而可在对应的频域资源检测接入网设备重复发送的下行数据信道。
举例来说，如图10所示，终端设备可将传输时间间隔n接收到的所有数据进行缓存，终端设备在传输时间间隔n内检测到第二个发送的下行控制信道，获得下行控制信息。终端设备根据下行控制信息确定下行数据信道的频域资源。终端设备可根据下行数据信道的频域资源，从缓存的传输时间间隔n内接收的数据中开始检测下行数据信道，直到检测出下行数据信道。可见，通过实施图9所描述的方法，终端设备在传输时间间隔n检测到下行控制信道之后，就可马上检测下行数据信道，有利于快速地检测到下行数据信道，在保证业务可靠性的同时，也可保证低时延。其中，图10所示的下行控制信道和下行数据信道的发送方法可应用于系统带宽不是很大的情况，终端设备有能力缓存整个系统带宽内的数据，即在正确检测出下行控制信息前，已经把数据接收并缓存下来。
再举例来说，如图11所示，如果终端设备在传输时间间隔n结束时，成功检测出下行控制信息，则从传输时间间隔n+1开始检测下行数据信道，直到检测出下行数据信道；如果在传输时间间隔n+1结束时成功检测出下行控制信息，则从传输时间间隔n+2开始检测下行数据信道，直到检测出下行数据信道。可见，通过实施图9所描述的方法，终端设备在传输时间间隔n检测到下行控制信道之后，就可马上在传输时间间隔n+1检测下行数据信道，有利于快速地检测到下行数据信道，在保证业务可靠性的同时，也可保证低时延。其中，图11所示的下行控制信道和下行数据信道的发送方法可应用于系统带宽比较大的情况，这样可以节省终端设备的存储空间。
可选的，接入网设备还可向终端设备发送用于获取目标偏移量的指示信息。其中， 该目标偏移量为首次发送下行数据信道的时域资源距离首次下行控制信道的时域资源的偏移量。例如，在图11中，目标偏移量为一个传输时间间隔。终端设备还可接收接入网设备发送的用于获取目标偏移量的指示信息。终端设备还可根据指示信息获取目标偏移量。终端设备检测接入网设备重复发送的下行数据信道的具体实施方式为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。可选的，该指示信息可以为高层配置的，即指示信息可包含于配置信息中发送至终端设备。可选的，配置信息还可包含以下至少一种：用于获取下行控制信道资源集合的指示信息，用于获得下行控制信道是否重复发送的指示信息，用于获得下行控制信道重复发送次数的指示信息，用于获得下行控制信道重复发送时时域上起始位置的指示信息，用于获得下行数据信道重复发送次数的指示信息。
在该实施方式中，具体地，终端设备在检测到下行控制信道之后，可获取下行控制信道承载的下行控制信息，并根据下行控制信息确定下行数据信道的频域资源。并且终端设备根据目标偏移量可确定下行数据信道的时域资源。例如，终端设备根据下行控制信道首次发送的时域资源和目标偏移量，就可确定下行数据信道的时域资源。终端设备根据下行数据信道的频域资源和时域资源就可检测出下行数据信道。
可见，通过实施该实施方式，终端设备可及时地确定目标偏移量，进而可根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源准确地检测出下行数据信道。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。终端设备检测到下行控制信道之后，就可从下行控制信息中获取指示信息，从而根据指示信息获取目标偏移量。终端设备根据目标偏移量确定下行数据信道的时域资源，并根据下行控制信息确定下行数据信道的频域资源，从而根据下行数据信道的时域资源和频域资源来检测下行数据信道。
可见，通过实施该实施方式，终端设备可及时地确定目标偏移量，终端设备可根据目标偏移量准确地确定出下行数据信道的时域资源，进而可根据下行数据信道的时域资源和频域资源准确地检测出下行数据信道。
可选的，接入网设备向终端设备发送的用于获取目标偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)包括偏移量与聚合等级(aggregation level,AL)之间的对应关系。终端设备根据指示信息获取目标偏移量的具体实施方式可以为：终端设备根据指示信息包括的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级。
例如，指示信息包括偏移量1对应聚合等级1，偏移量2对应聚合等级2。若当前检测到的下行控制信道的聚合等级为聚合等级2，则目标偏移量为偏移量2。
如果使用较高的聚合等级发送下行控制信道，终端检测出下行控制信息的概率越高，那么终端可能检测一次发送的下行控制信道后就能成功检测出下行控制信息。因此，聚合等级越高，第一次发送下行数据信道的时间距离第一次发送控制信道的时间的偏移量就不需要太长；如果使用的聚合等级较小，则第一次发送下行数据信道的时间距离第一次 发送控制信道的时间的偏移量相对较长。
因此，可以设置较小的偏移量对应较大的聚合等级，较大的偏移量对应较小的聚合等级。例如，偏移量1(一个OFDM符号)对应聚合等级1(AL＝8)，偏移量2(两个OFDM符号)对应聚合等级2(AL＝2)。可见，通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
可选的，终端设备根据预存的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，该目标聚合等级为当前检测到下行控制信道的聚合等级；终端设备检测接入网设备重复发送的下行数据信道的具体实施方式可以为：终端设备根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
在该实施方式中，接入网设备可以不用向终端设备发送用于获取目标偏移量的指示信息。终端设备自身存储有偏移量与聚合等级之间的对应关系。在终端设备检测到下行控制信道之后，可获取当前检测到的下行控制信道的聚合等级。终端设备获取与当前检测到下行控制信道的聚合等级对应的目标偏移量。例如，终端设备预存有对应关系：偏移量1对应聚合等级1，偏移量2对应聚合等级2。若当前检测到的下行控制信道的聚合等级为聚合等级2，则目标偏移量为偏移量2。终端设备检测到目标偏移量和下行控制信道之后，根据目标偏移量确定下行数据信道的时域资源，根据下行控制信道承载的下行控制信息确定下行数据信道的频域资源。终端设备根据下行数据信道的时域资源和频域资源就可检测下行数据信道。
通过实施该实施方式，接入网设备不向终端设备发送用于获取目标偏移量的指示信息，终端设备就可确定目标偏移量，这样有利于节省传输资源。
可选的，接入网设备向终端设备发送的用于获取目标偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)可以包括目标偏移量。也即是说，接入网设备直接将具体的目标偏移量告诉终端设备。例如，接入网设备确定当前下发的下行控制信道的聚合等级之后，可根据接入网设备预存的偏移量与聚合等级之间的对应关系，获取目标偏移量，该目标偏移量为当前下发的下行控制信道的聚合等级对应的偏移量。接入网设备将目标偏移量通过配置信息发送至终端设备或通过下行控制信息发送至终端设备。通过实施该实施方式，可减少终端设备的工作量，节省终端设备CPU资源。
可选的，目标偏移量可以为0，一个传输时间间隔或者多个传输时间间隔。如图11所示，目标偏移量为一个传输时间间隔。
值得一提的是，在上述实施例中，下行控制信道的重复发送可以不是连续发送的相同的下行控制信道，下行数据信道的重复发送可以不是连续发送的相同的下行数据信道。实际发送时，两次发送的下行控制信道之间可能包括无效子帧，或两次发送的下行数据信道之间可能包括无效子帧。这里的无效子帧可能是用于上行传输的子帧，或者是多播/组播单频网络(multicast broadcast single frequency network，MBSFN)子帧，或者是用于异频率测量的子帧。也就是说，图2、图4、图5、图7、图8、图10、图11是以连续发送相同的下行控制信道和连续发送相同的下行数据信道为例，图2、图4、图5、图7、图8、图10、图11中下行控制信道和下行数据信道也可以不连续发送。
为了同时保证业务的可靠性和短时延，本申请实施例还提供了一种通信方法及相关设备，下面进一步对本申请所提供的通信方法及设备进行介绍。
请参见图12，图12是本申请实施例提供的通信方法。如图12所示，该通信方法包括如下1201～1204部分，其中：
1201、接入网设备向终端设备重复发送下行控制信道。
本申请实施例中，接入网设备向终端设备至少发送两次下行控制信道，且每次发送的下行控制信道相同。下行控制信道用于调度上行数据信道的发送。
1202、接入网设备在第一时刻检测终端设备重复发送的上行数据信道，该第一时刻为最早允许终端设备重复发送上行数据信道的时刻，该第一时刻距离首次发送下行控制信道的时域资源的偏移量为第一偏移量，该接入网设备首次接收终端设备重复发送的上行数据信道的时刻不早于第一时刻。
1203、终端设备检测接入网设备重复发送的下行控制信道。
本申请实施例中，终端设备可检测1201部分中接入网设备重复发送的下行控制信道。
1204、终端设备检测到下行控制信道之后，向接入网设备重复发送上行数据信道，终端设备首次发送上行数据信道的时刻不早于第一时刻。
举例来说，如图13所示，最早允许终端设备重复发送上行数据信道的时刻为第3个符号。因此，第一偏移量为2个符号。终端设备实际发送上行数据信道的时刻为第4个符号。接入网设备在第3个符号就可开始检测上行数据信道。由于最早允许终端设备重复发送上行数据信道的时刻不晚于接入网设备接收上行数据信道的实际时刻，因此接入网设备可及时地检测出上行数据信道。因此，通过实施图12所描述的方法有利于在保证业务的可靠性的同时保证短时延。
可选的，终端设备检测出的下行控制信道的时域资源与终端设备首次发送上行数据信道的时域资源具有第二偏移量，这里的首次发送上行数据信道是指重复发送上行数据信道中的首次发送上行数据信道。第一偏移量和第二偏移量用于终端设备在检测到下行控制信道之后，若第二偏移量大于或等于第一偏移量，则根据第二偏移量重复发送上行数据信道；若第二偏移量小于第一偏移量，则根据第一偏移量重复发送上行数据信道。也就是说，终端设备向接入网设备重复发送上行数据信道的具体实施方式包括：若第二偏移量大于或等于第一偏移量，则根据第二偏移量重复发送上行数据信道；若第二偏移量小于第一偏移量，则根据第一偏移量重复发送上行数据信道。
举例来说，如图14所示，最早允许终端设备重复发送上行数据信道的时刻距离第一个下行控制信息的第一偏移量为2个符号。若终端设备检测出第一个下行控制信息，第一个下行控制信息的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的第二偏移量为3个符号。若终端设备检测出第二个下行控制信息，第二个下行控制信息的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的第二偏移量为3个符号。由于第二偏移量大于第一偏移量，则根据第二偏移量重复发送上行数据信道，即若终端设备检测出第一个下行控制信息，则终端设备从第4个符号开始重复发送上行数据信道；若终端设备检测出第二个下行控制信息，则终端设 备从第5个符号开始重复发送上行数据信道。接入网设备在第3个符号就开始盲检上行数据信道，这样无论终端设备在何时检测到下行控制信道，接入网设备都可及时检测到上行数据信道。
可选的，接入网设备还可向终端设备发送用于获取第一偏移量和/或第二偏移量的指示信息。终端设备还可接收接入网设备发送的用于获取第一偏移量和/或第二偏移量的指示信息；终端设备根据指示信息获取第一偏移量和/或第二偏移量。进而终端设备检测到下行控制信道之后，若第二偏移量大于或等于第一偏移量，则终端设备可根据第二偏移量重复发送上行数据信道；若第二偏移量小于第一偏移量，则终端设备可根据第一偏移量重复发送上行数据信道。可选的，该指示信息可以为高层配置的，即指示信息可包含于配置信息中发送至终端设备。可选的，配置信息还可包含以下至少一种：用于获取下行控制信道资源集合的指示信息，用于获得下行控制信道是否重复发送的指示信息，用于获得下行控制信道重复发送次数的指示信息，用于获得下行控制信道重复发送时时域上起始位置的指示信息。
可见，通过实施该实施方式，终端设备可及时获取到第一偏移量和/或第二偏移量，并根据第一偏移量和/或第二偏移量确定上行数据信道的时域资源。
可选的，下行控制信道承载的下行控制信息包括用于获取第一偏移量和/或第二偏移量的指示信息。终端设备检测到下行控制信道之后，从下行控制信道承载的下行控制信息中获取用于获取第一偏移量和/或第二偏移量的指示信息，并根据该指示信息获取第一偏移量和/或第二偏移量。进而若第二偏移量大于或等于第一偏移量，则终端设备可根据第二偏移量重复发送上行数据信道；若第二偏移量小于第一偏移量，则终端设备可根据第一偏移量重复发送上行数据信道。
可见，通过实施该实施方式，终端设备可及时获取到第一偏移量和/或第二偏移量，并根据第一偏移量和/或第二偏移量确定上行数据信道的时域资源。
可选的，指示信息包括最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，和/或指示信息包括检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系。
终端设备根据指示信息获取第一偏移量和/或第二偏移量的具体实施方式包括：
终端设备根据最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的第一偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级；和/或
终端设备根据检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的第二偏移量。
例如，最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系包括：偏移量1对应聚合等级1，偏移量2对应聚合等级2。检测到的下行控制信道的时域资源距离终端设备首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系包括：偏移量3对应聚合等级1， 偏移量4对应聚合等级2。若目标聚合等级为聚合等级1，则第一偏移量为偏移量1，第二偏移量为偏移量3。
因此，可以设置较小的偏移量对应较大的聚合等级，较大的偏移量对应较小的聚合等级。
可见，通过实施该实施方式，能够灵活地配置目标偏移量，有利于减少业务发送的时延。
可选的，接入网设备可以不用向终端设备发送用于获取第一偏移量和/或第二偏移量的指示信息。终端设备可根据预存的最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的第一偏移量，该目标聚合等级为当前检测到下行控制信道的聚合等级；和/或，终端设备可根据预存的检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的第二偏移量。
通过实施该实施方式，接入网设备不向终端设备发送用于获取第一偏移量和/或第二偏移量的指示信息，终端设备就可确定第一偏移量和/或第二偏移量，这样有利于节省传输资源。
可选的，接入网设备向终端设备发送的用于获取第一偏移量和/或第二偏移量的指示信息(通过高层配置的指示信息或通过下行控制信息承载的指示信息)可以包括第一偏移量和/或第二偏移量。也即是说，接入网设备直接将具体的第一偏移量和/或第二偏移量告诉终端设备。例如，接入网设备确定当前下发的下行控制信道的聚合等级之后，可根据接入网设备预存的最早允许终端设备重复发送上行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量与聚合等级之间的对应关系，获取当前下发的下行控制信道的聚合等级对应的第一偏移量。接入网设备可根据预存的检测到的下行控制信道的时域资源距离终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源的偏移量与聚合等级之间的对应关系，获取当前下发的下行控制信道的聚合等级对应的第二偏移量。接入网设备将第一偏移量和/或第二偏移量通过配置信息发送至终端设备或通过下行控制信息发送至终端设备。通过实施该实施方式，可减少终端设备的工作量，节省终端设备的CPU资源。
值得一提的是，在图12所描述的实施例中，下行控制信道的重复发送可以不是连续发送的相同的下行控制信道，实际发送时，两次发送的下行控制信道之间可能包括有无效子帧。这里的无效子帧可能是用于上行传输的子帧，或者是多播/组播单频网络(multicast broadcast single frequency network，MBSFN)子帧，或者是用于异频率测量的子帧。也就是说，图13、图14是以连续发送相同的下行控制信道为例，图13、图14中下行控制信道也可以不连续发送。
在图12所描述的实施例中，终端设备重复发送的上行数据信道可以不是连续发送的相同的上行数据信道。实际发送时，两次发送的上行数据信道之间可能包括有无效子帧。该无效子帧为下行子帧，或者用于终端和终端进行通信的子帧等。也就是说，图13、图14是以连续发送相同的上行数据信道为例，图13、图14中上行数据信道也可以不连续发送。
本发明实施例可以根据上述方法示例对装置进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本发明实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
本发明实施提供了一种接入网设备。该接入网设备可以为上述方法实施例中图3所示的接入网设备。该接入网设备包括：通信模块。其中：
通信模块，用于向终端设备重复发送下行控制信道，下行控制信道用于调度下行数据信道的发送；通信模块，还用于向终端设备重复发送下行数据信道，下行数据信道首次传输在下行控制信道首次传输之后，并且下行数据信道首次传输不晚于下行控制信道最后一次传输。
可选的，通信模块，还用于向终端设备发送用于获取目标偏移量的指示信息，该目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。
可选的，指示信息包括偏移量与聚合等级之间的对应关系。
本发明实施提供了一种终端设备。该终端设备可以为上述方法实施例中图3所示的终端设备。该终端设备包括：处理模块。其中：
处理模块，用于检测接入网设备重复发送的下行控制信道，下行控制信道用于调度下行数据信道的发送；处理模块，还用于检测接入网设备重复发送的下行数据信道，下行数据信道首次传输在下行控制信道首次传输之后，并且下行数据信道首次传输不晚于下行控制信道的最后一次传输。
可选的，处理模块，还用于根据预存的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；处理模块检测接入网设备重复发送的下行数据信道的方式具体为：处理模块根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可选的，终端设备还包括通信模块，通信模块，用于接收接入网设备发送的用于获取目标偏移量的指示信息，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；处理模块，还用于根据指示信息获取目标偏移量；处理模块检测接入网设备重复发送的下行数据信道的方式具体为：处理模块根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的 偏移量；处理模块，还用于根据指示信息获取目标偏移量；处理模块检测接入网设备重复发送的下行数据信道的方式具体为：处理模块根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可选的，指示信息包括偏移量与聚合等级之间的对应关系；处理模块根据指示信息获取目标偏移量的方式具体为：处理模块根据指示信息包括的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级。
本发明实施提供了又一种接入网设备。该接入网设备可以为上述方法实施例中图9所示的接入网设备。该接入网设备包括：通信模块。其中：
通信模块，用于向终端设备重复发送下行控制信道，下行控制信道用于调度下行数据信道的发送；通信模块，还用于向终端设备重复发送下行数据信道，至少首次发送的下行数据信道的时域资源包括发送多次下行控制信道的时域资源。
可选的，通信模块，还用于向终端设备发送用于获取目标偏移量的指示信息，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量。
可选的，指示信息包括偏移量与聚合等级之间的对应关系。
本发明实施提供了又一种终端设备。该终端设备可以为上述方法实施例中图9所示的终端设备。该终端设备包括：处理模块。其中：
处理模块，用于检测接入网设备重复发送的下行控制信道，下行控制信道用于调度下行数据信道的发送；处理模块，还用于检测接入网设备重复发送的下行数据信道，至少首次发送的下行数据信道的时域资源包括发送多次下行控制信道的时域资源。
可选的，处理模块，还用于根据预存的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；处理模块检测接入网设备重复发送的下行数据信道的方式具体为：处理模块根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可选的，终端设备还包括通信模块，通信模块，用于接收接入网设备发送的用于获取目标偏移量的指示信息，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的偏移量；处理模块，还用于根据指示信息获取目标偏移量；处理模块检测接入网设备重复发送的下行数据信道的方式具体为：处理模块根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可选的，下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，目标偏移量为首次发送下行数据信道的时域资源距离首次发送下行控制信道的时域资源的 偏移量；处理模块，还用于根据指示信息获取目标偏移量；处理模块检测接入网设备重复发送的下行数据信道的方式具体为：处理模块根据目标偏移量，在检测到下行控制信道之后，检测下行数据信道。
可选的，指示信息包括偏移量与聚合等级之间的对应关系；处理模块根据指示信息获取目标偏移量的方式具体为：处理模块根据指示信息包括的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，目标聚合等级为当前检测到下行控制信道的聚合等级。
请参见图15，图15是本发明实施提供的又一种接入网设备。该接入网设备可以为上述方法实施例中图12所示的接入网设备。该接入网设备包括：通信模块1501和处理模块1502。其中：
通信模块1501，用于向终端设备重复发送下行控制信道，下行控制信道用于调度上行数据信道的发送；处理模块1502，用于在第一时刻检测终端设备重复发送的上行数据信道，第一时刻为最早允许终端设备重复发送上行数据信道的时刻，第一时刻距离首次发送下行控制信道的时域资源的偏移量为第一偏移量，通信模块1501首次接收终端设备重复发送的上行数据信道的时刻不早于第一时刻。
可选的，终端设备检测出的下行控制信道的时域资源与终端设备重复发送上行数据信道中的首次发送上行数据信道的时域资源具有第二偏移量；第一偏移量和第二偏移量用于终端设备在检测到下行控制信道之后，若第二偏移量大于或等于第一偏移量，则根据第二偏移量重复发送上行数据信道；若第二偏移量小于第一偏移量，则根据第一偏移量重复发送上行数据信道。
请参见图16，图16是本发明实施提供的又一种终端设备。该终端设备可以为上述方法实施例中图12所示的终端设备。该终端设备包括：通信模块1601和处理模块1602。其中：
处理模块1602，用于检测接入网设备重复发送的下行控制信道，下行控制信道用于调度上行数据信道的发送；通信模块1601，用于在处理模块1602检测到下行控制信道之后，向接入网设备重复发送上行数据信道，通信模块1601首次发送上行数据信道的时刻不早于第一时刻，第一时刻为最早允许终端设备重复发送上行数据信道的时刻，第一时刻距离首次发送下行控制信道的时域资源的偏移量为第一偏移量。
可选的，处理模块1602检测出的下行控制信道的时域资源与通信模块1601重复发送上行数据信道中的首次发送上行数据信道的时域资源具有第二偏移量；通信模块1601向接入网设备重复发送上行数据信道的方式具体为：若第二偏移量大于或等于第一偏移量，则根据第二偏移量重复发送上行数据信道；若第二偏移量小于第一偏移量，则根据第一偏移量重复发送上行数据信道。
请参见图17，图17是本申请实施例公开的一种接入网设备的结构示意图。该接入网设备可以为上述方法实施例中图3、图6或图9或图12所示的接入网设备。如图17所 示，该接入网设备1700包括处理器1701、存储器1702和通信接口1703。其中，处理器1701、存储器1702和通信接口1703相连。
其中，处理器1701可以是中央处理器(central processing unit，CPU)，通用处理器，协处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。该处理器1701也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
其中，通信接口1703用于实现与其他网元(如终端设备)之间的通信。
其中，处理器1701调用存储器1702中存储的程序代码，可执行上述方法实施例中图3、图6、图9或图12所描述的接入网设备所执行的步骤。
请参见图18，图18是本申请实施例公开的一种终端设备的结构示意图。该终端设备可以为上述方法实施例中图3、图6或图9或图12所示的终端设备。如图18所示，该终端设备1800包括处理器1801、存储器1802和通信接口1803。其中，处理器1801、存储器1802和通信接口1803相连。
其中，处理器1801可以是中央处理器(central processing unit，CPU)，通用处理器，协处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。该处理器1801也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
其中，通信接口1803用于实现与其他网元(如接入网设备)之间的通信。
其中，处理器1801调用存储器1802中存储的程序代码，可执行上述方法实施例中图3、图6、图9或图12所描述的终端设备所执行的步骤。
基于同一发明构思，本申请实施例中提供的各设备解决问题的原理与本申请方法实施例相似，因此各设备的实施可以参见方法的实施，为简洁描述，在这里不再赘述。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (32)

  1. 一种通信方法，其特征在于，所述方法包括：
    向终端设备重复发送下行控制信道，所述下行控制信道用于调度下行数据信道的发送；
    向所述终端设备重复发送所述下行数据信道，所述下行数据信道首次传输在所述下行控制信道首次传输之后，并且所述下行数据信道首次传输不晚于所述下行控制信道最后一次传输。
  2. 一种通信方法，其特征在于，所述方法包括：
    向终端设备重复发送下行控制信道，所述下行控制信道用于调度下行数据信道的发送；
    向所述终端设备重复发送所述下行数据信道，至少首次发送的所述下行数据信道的时域资源包括发送多次所述下行控制信道的时域资源。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送用于获取目标偏移量的指示信息，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量。
  4. 根据权利要求1或2所述的方法，其特征在于，所述下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量。
  5. 根据权利要求3或4所述的方法，其特征在于，所述指示信息包括偏移量与聚合等级之间的对应关系。
  6. 一种通信方法，其特征在于，所述方法包括：
    检测接入网设备重复发送的下行控制信道，所述下行控制信道用于调度下行数据信道的发送；
    检测所述接入网设备重复发送的所述下行数据信道，所述下行数据信道首次传输在所述下行控制信道首次传输之后，并且所述下行数据信道首次传输不晚于所述下行控制信道的最后一次传输。
  7. 一种通信方法，其特征在于，所述方法包括：
    检测接入网设备重复发送的下行控制信道，所述下行控制信道用于调度下行数据信道的发送；
    检测所述接入网设备重复发送的所述下行数据信道，至少首次发送的所述下行数据信道的时域资源包括发送多次所述下行控制信道的时域资源。
  8. 根据权利要求6或7所述的方法，其特征在于，所述方法还包括：
    根据预存的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量， 所述目标聚合等级为当前检测到所述下行控制信道的聚合等级，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量；
    所述检测所述接入网设备重复发送的所述下行数据信道，包括：
    根据所述目标偏移量，在检测到所述下行控制信道之后，检测所述下行数据信道。
  9. 根据权利要求6或7所述的方法，其特征在于，所述方法还包括：
    接收所述接入网设备发送的用于获取目标偏移量的指示信息，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量；
    根据所述指示信息获取所述目标偏移量；
    所述检测所述接入网设备重复发送的所述下行数据信道，包括：
    根据所述目标偏移量，在检测到所述下行控制信道之后，检测所述下行数据信道。
  10. 根据权利要求6或7所述的方法，其特征在于，所述下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量；
    所述方法还包括：
    根据所述指示信息获取所述目标偏移量；
    所述检测所述接入网设备重复发送的所述下行数据信道，包括：
    根据所述目标偏移量，在检测到所述下行控制信道之后，检测所述下行数据信道。
  11. 根据权利要求9或10所述的方法，其特征在于，所述指示信息包括偏移量与聚合等级之间的对应关系；
    所述根据所述指示信息获取所述目标偏移量，包括：
    根据所述指示信息包括的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，所述目标聚合等级为当前检测到所述下行控制信道的聚合等级。
  12. 一种通信方法，其特征在于，所述方法包括：
    向终端设备重复发送下行控制信道，所述下行控制信道用于调度上行数据信道的发送；
    在第一时刻检测所述终端设备重复发送的所述上行数据信道，所述第一时刻为最早允许所述终端设备重复发送所述上行数据信道的时刻，所述第一时刻距离首次发送所述下行控制信道的时域资源的偏移量为第一偏移量，所述接入网设备首次接收所述终端设备重复发送的所述上行数据信道的时刻不早于所述第一时刻。
  13. 根据权利要求12所述的方法，其特征在于，所述终端设备检测出的所述下行控制信道的时域资源与所述终端设备重复发送上行数据信道中的首次发送所述上行数据信道的时域资源具有第二偏移量；所述第一偏移量和所述第二偏移量用于所述终端设备在检测到所述下行控制信道之后，若所述第二偏移量大于或等于所述第一偏移量，则根据所述第二偏移量重复发送所述上行数据信道；若所述第二偏移量小于所述第一偏移量，则根据所述 第一偏移量重复发送所述上行数据信道。
  14. 一种通信方法，其特征在于，所述方法包括：
    检测接入网设备重复发送的下行控制信道，所述下行控制信道用于调度上行数据信道的发送；
    检测到所述下行控制信道之后，向所述接入网设备重复发送所述上行数据信道，所述终端设备首次发送所述上行数据信道的时刻不早于第一时刻，所述第一时刻为最早允许所述终端设备重复发送所述上行数据信道的时刻，所述第一时刻距离首次发送所述下行控制信道的时域资源的偏移量为第一偏移量。
  15. 根据权利要求14所述的方法，其特征在于，检测出的所述下行控制信道的时域资源与所述终端设备重复发送上行数据信道中的首次发送所述上行数据信道的时域资源具有第二偏移量；
    所述向所述接入网设备重复发送所述上行数据信道，包括：
    若所述第二偏移量大于或等于所述第一偏移量，则根据所述第二偏移量重复发送所述上行数据信道；
    若所述第二偏移量小于所述第一偏移量，则根据所述第一偏移量重复发送所述上行数据信道。
  16. 一种接入网设备，其特征在于，所述接入网设备包括：
    通信模块，用于向终端设备重复发送下行控制信道，所述下行控制信道用于调度下行数据信道的发送；
    所述通信模块，还用于向所述终端设备重复发送所述下行数据信道，所述下行数据信道首次传输在所述下行控制信道首次传输之后，并且所述下行数据信道首次传输不晚于所述下行控制信道最后一次传输。
  17. 一种接入网设备，其特征在于，所述接入网设备包括：
    通信模块，用于向终端设备重复发送下行控制信道，所述下行控制信道用于调度下行数据信道的发送；
    所述通信模块，还用于向所述终端设备重复发送所述下行数据信道，至少首次发送的所述下行数据信道的时域资源包括发送多次所述下行控制信道的时域资源。
  18. 根据权利要求16或17所述的接入网设备，其特征在于，
    所述通信模块，还用于向所述终端设备发送用于获取目标偏移量的指示信息，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量。
  19. 根据权利要求16或17所述的接入网设备，其特征在于，所述下行控制信道承载 的下行控制信息包括用于获取目标偏移量的指示信息，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量。
  20. 根据权利要求18或19所述的接入网设备，其特征在于，所述指示信息包括偏移量与聚合等级之间的对应关系。
  21. 一种终端设备，其特征在于，所述终端设备包括：
    处理模块，用于检测接入网设备重复发送的下行控制信道，所述下行控制信道用于调度下行数据信道的发送；
    所述处理模块，还用于检测所述接入网设备重复发送的所述下行数据信道，所述下行数据信道首次传输在所述下行控制信道首次传输之后，并且所述下行数据信道首次传输不晚于所述下行控制信道的最后一次传输。
  22. 一种终端设备，其特征在于，所述终端设备包括：
    处理模块，用于检测接入网设备重复发送的下行控制信道，所述下行控制信道用于调度下行数据信道的发送；
    所述处理模块，还用于检测所述接入网设备重复发送的所述下行数据信道，至少首次发送的所述下行数据信道的时域资源包括发送多次所述下行控制信道的时域资源。
  23. 根据权利要求21或22所述的终端设备，其特征在于，
    所述处理模块，还用于根据预存的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，所述目标聚合等级为当前检测到所述下行控制信道的聚合等级，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量；
    所述处理模块检测所述接入网设备重复发送的所述下行数据信道的方式具体为：
    所述处理模块根据所述目标偏移量，在检测到所述下行控制信道之后，检测所述下行数据信道。
  24. 根据权利要求21或22所述的终端设备，其特征在于，所述终端设备还包括通信模块，
    所述通信模块，用于接收所述接入网设备发送的用于获取目标偏移量的指示信息，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量；
    所述处理模块，还用于根据所述指示信息获取所述目标偏移量；
    所述处理模块检测所述接入网设备重复发送的所述下行数据信道的方式具体为：
    所述处理模块根据所述目标偏移量，在检测到所述下行控制信道之后，检测所述下行数据信道。
  25. 根据权利要求21或22所述的终端设备，其特征在于，所述下行控制信道承载的下行控制信息包括用于获取目标偏移量的指示信息，所述目标偏移量为首次发送所述下行数据信道的时域资源距离首次发送所述下行控制信道的时域资源的偏移量；
    所述处理模块，还用于根据所述指示信息获取所述目标偏移量；
    所述处理模块检测所述接入网设备重复发送的所述下行数据信道的方式具体为：
    所述处理模块根据所述目标偏移量，在检测到所述下行控制信道之后，检测所述下行数据信道。
  26. 根据权利要求24或25所述的终端设备，其特征在于，所述指示信息包括偏移量与聚合等级之间的对应关系；
    所述处理模块根据所述指示信息获取所述目标偏移量的方式具体为：
    所述处理模块根据所述指示信息包括的偏移量与聚合等级之间的对应关系，获取目标聚合等级对应的目标偏移量，所述目标聚合等级为当前检测到所述下行控制信道的聚合等级。
  27. 一种接入网设备，其特征在于，所述接入网设备包括：
    通信模块，用于向终端设备重复发送下行控制信道，所述下行控制信道用于调度上行数据信道的发送；
    处理模块，用于在第一时刻检测所述终端设备重复发送的所述上行数据信道，所述第一时刻为最早允许所述终端设备重复发送所述上行数据信道的时刻，所述第一时刻距离首次发送所述下行控制信道的时域资源的偏移量为第一偏移量，所述通信模块首次接收所述终端设备重复发送的所述上行数据信道的时刻不早于所述第一时刻。
  28. 根据权利要求27所述的接入网设备，其特征在于，所述终端设备检测出的所述下行控制信道的时域资源与所述终端设备重复发送上行数据信道中的首次发送所述上行数据信道的时域资源具有第二偏移量；所述第一偏移量和所述第二偏移量用于所述终端设备在检测到所述下行控制信道之后，若所述第二偏移量大于或等于所述第一偏移量，则根据所述第二偏移量重复发送所述上行数据信道；若所述第二偏移量小于所述第一偏移量，则根据所述第一偏移量重复发送所述上行数据信道。
  29. 一种终端设备，其特征在于，所述终端设备包括：
    处理模块，用于检测接入网设备重复发送的下行控制信道，所述下行控制信道用于调度上行数据信道的发送；
    通信模块，用于在所述处理模块检测到所述下行控制信道之后，向所述接入网设备重复发送所述上行数据信道，所述通信模块首次发送所述上行数据信道的时刻不早于第一时刻，所述第一时刻为最早允许所述终端设备重复发送所述上行数据信道的时刻，所述第一时刻距离首次发送所述下行控制信道的时域资源的偏移量为第一偏移量。
  30. 根据权利要求29所述的终端设备，其特征在于，所述处理模块检测出的所述下行控制信道的时域资源与所述通信模块重复发送上行数据信道中的首次发送所述上行数据信道的时域资源具有第二偏移量；
    所述通信模块向所述接入网设备重复发送所述上行数据信道的方式具体为：
    若所述第二偏移量大于或等于所述第一偏移量，则根据所述第二偏移量重复发送所述上行数据信道；
    若所述第二偏移量小于所述第一偏移量，则根据所述第一偏移量重复发送所述上行数据信道。
  31. 一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如权利要求1-15中任一项所述的方法的步骤。
  32. 一种通信装置，其特征在于，包括：处理器和存储器，所述存储器存储执行指令，所述处理器执行所述指令使得所述装置执行如权利要求1～15中任意一项所述的方法的步骤。
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