WO2022028158A1 - 一种重传数据的方法及装置 - Google Patents

一种重传数据的方法及装置 Download PDF

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Publication number
WO2022028158A1
WO2022028158A1 PCT/CN2021/103516 CN2021103516W WO2022028158A1 WO 2022028158 A1 WO2022028158 A1 WO 2022028158A1 CN 2021103516 W CN2021103516 W CN 2021103516W WO 2022028158 A1 WO2022028158 A1 WO 2022028158A1
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WIPO (PCT)
Prior art keywords
bit sequence
downlink control
control information
uplink data
crc
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PCT/CN2021/103516
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English (en)
French (fr)
Inventor
焦淑蓉
李军
花梦
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华为技术有限公司
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Publication of WO2022028158A1 publication Critical patent/WO2022028158A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607Details of the supervisory signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1809Selective-repeat protocols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a method and apparatus for retransmitting data.
  • the 5th generation (5G) mobile communication system can support multiple types of services at the same time, such as enhanced mobile broadband (eMBB) services, high reliability and low delay communication (ultra-reliable and low-latency) latency communications, URLLC) business, massive machine type communication (massive machine type communication, mMTC) business.
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable and low-latency latency communications
  • mMTC massive machine type communication
  • the network device Due to the burstiness of the data of the URLLC service, in order to improve the resource utilization rate of the system, the network device usually does not reserve resources for the data transmission of the URLLC service.
  • the network device can use preemption to allocate resources for the URLLC service. Preemption can occur between different service transmissions of the same terminal device, or between different terminal devices that perform different service transmissions.
  • the network device can select some or all of the time-frequency resources that have been allocated for transmitting eMBB service data.
  • the resource is used to transmit URLLC service data.
  • the data transmission of the eMBB service once its resources are preempted, the data transmission of the eMBB service on the preempted symbols and the symbols after the preempted symbols are cancelled. In this scenario, how to retransmit the canceled eMBB service data is a problem that needs to be solved.
  • a method and apparatus for retransmitting data in the embodiments of the present application are used to implement partial CBG retransmission in CBG-based transmission.
  • an embodiment of the present application provides a method for retransmitting data.
  • the method can be executed by a terminal device or by a component (for example, a chip or a circuit) configured in the terminal device.
  • a component for example, a chip or a circuit
  • the method may include: the terminal device receives first downlink control information from the network device, where the first downlink control information is used to schedule initial transmission of first uplink data, the first uplink data includes TB, and the TB is sent by the first Bit sequences (b 0 , b 1 , ... b L-1 ); the terminal device receives the second downlink control information from the network device, where the second downlink control information is used to schedule and retransmit the second bit sequence in the first bit sequence.
  • Bit sequence (br , br+1 ,...b L-1 ), r is a positive integer; the terminal device generates the second uplink data according to the second bit sequence and the first CRC bit sequence, or according to the second bit sequence and The second CRC bit sequence generates the second uplink data, wherein the first CRC bit sequence is generated according to the second bit sequence, and the second CRC bit sequence is generated according to the first bit sequence; the terminal device sends the second uplink data to Internet equipment.
  • the terminal device when the terminal device is scheduled to retransmit a partial bit sequence in a TB, the terminal device can generate a second CRC bit sequence to be transmitted according to the partial bit sequence to be transmitted and the first CRC bit sequence or the second CRC bit sequence. Uplink data is sent to the network device.
  • the gain of the TB CRC can be obtained as much as possible, the performance loss caused by the false alarm of the CB CRC can be effectively reduced, and the complexity of the terminal device implementation can be reduced at the same time.
  • the terminal device if the terminal device also receives third downlink control information from the network device before receiving the second downlink control information, the third downlink control information indicates that the first bit sequence is canceled. Partial transmission, the terminal device generates the second uplink data according to the second bit sequence and the first CRC bit sequence.
  • the terminal device if the terminal device has not generated the second CRC bit sequence according to the first bit sequence before receiving the second downlink control information, the terminal device will generate the second CRC bit sequence according to the second bit sequence and the first CRC bit sequence.
  • the bit sequence generates the second upstream data.
  • the terminal device if the terminal device does not receive the third downlink control information from the network device before receiving the second downlink control information, the third downlink control information indicates that the first bit sequence is cancelled. Partial transmission, the terminal device generates second uplink data according to the second bit sequence and the second CRC bit sequence.
  • the terminal device if the terminal device has generated the second CRC bit sequence according to the first bit sequence before receiving the second downlink control information, the terminal device will generate the second CRC bit sequence according to the second bit sequence and the second CRC bit sequence.
  • the bit sequence generates the second upstream data.
  • the terminal device receives configuration information from the network device, where the configuration information indicates CBG-based transmission, the configuration information includes first information, and the first information indicates that the TB includes The maximum number of CBGs.
  • an embodiment of the present application provides a method for retransmitting data, which can be performed by a network device or by a component (for example, a chip or circuit) configured in the network device.
  • a component for example, a chip or circuit
  • the method may include: the network device sends first downlink control information to the terminal device, where the first downlink control information is used to schedule initial transmission of the first uplink data, the first uplink data includes a TB, and the TB consists of a first bit of sequence (b 0 , b 1 , ...
  • the network device sends second downlink control information to the terminal device, where the second downlink control information is used to schedule and retransmit the second bit sequence in the first bit sequence , (br , br+1 ,...b L-1 ), r is a positive integer; the network device receives the second uplink data from the terminal device, and the second uplink data is based on the second bit sequence and the first CRC is generated according to the bit sequence, or the second uplink data is generated according to the second bit sequence and the second CRC bit sequence, wherein the first CRC bit sequence is generated according to the second bit sequence, and the second CRC bit sequence is generated according to the second bit sequence. generated by a bit sequence.
  • the network device sends third downlink control information to the terminal device before sending the second downlink control information
  • the third downlink control information indicates to cancel the partial transmission of the first bit sequence
  • the second uplink data is generated according to the second bit sequence and the first CRC bit sequence.
  • the second uplink data is generated according to the second bit sequence and the first CRC bit sequence are generated.
  • the third downlink control information indicates to cancel the partial transmission of the first bit sequence
  • the second uplink data is generated according to the second bit sequence and the second CRC bit sequence.
  • the second uplink data is based on the first bit sequence. sequence and the second CRC bit sequence is generated.
  • the method further includes: the network device sends configuration information to the terminal device, where the configuration information indicates CBG-based transmission, the configuration information includes first information, and the first information indicates The maximum number of CBGs included in the TB.
  • an embodiment of the present application provides a method for retransmitting data.
  • the method can be executed by a network device or by a component (for example, a chip or a circuit) configured in the network device.
  • a component for example, a chip or a circuit
  • the method may include: the network device generates downlink control information, where the downlink control information is used to schedule first uplink data, the first uplink data includes a TB, the TB includes N CBGs, and the downlink control information includes the second information and the first uplink data.
  • the second information is used to indicate M CBGs in the N CBGs
  • the M CBGs include the last CBG of the N CBGs
  • the third information is used to indicate retransmission
  • N and M are both positive integers
  • the network device sends the downlink control information to the terminal device information.
  • the operation of scheduling and retransmission of the network equipment is restricted, and the network equipment is required to perform at least one complete TB transmission before scheduling the transmission of part of the CBG.
  • the second CRC bit sequence generated during the transmission of the TB realizes the retransmission of this partial CBG.
  • the network device receives the N CBGs before sending the downlink control information, but at least one of the N CBGs is not successfully decoded, then M less than or equal to N.
  • the network device sends configuration information to the terminal device, where the configuration information is used to indicate CBG-based transmission, the configuration information includes first information, and the first information is used to indicate the The maximum number of CBGs included in the TB.
  • an embodiment of the present application provides a method for retransmitting data.
  • the method can be executed by a terminal device or by a component (for example, a chip or a circuit) configured in the terminal device.
  • a component for example, a chip or a circuit
  • the method may include: the terminal device receives downlink control information from the network device, where the downlink control information is used to schedule first uplink data, the first uplink data includes a TB, the TB includes N CBGs, and the downlink control information includes the first uplink data.
  • Second information and third information where the second information is used to indicate M CBGs among the N CBGs, the M CBGs include the last CBG among the N CBGs, and the third information is used to indicate For retransmission, N and M are positive integers, and M is less than N; if the terminal device does not generate a second CRC bit sequence according to the information bit sequence corresponding to the TB before receiving the downlink control information, the terminal device ignores all downlink control information.
  • the terminal device if the terminal device has generated a second CRC bit sequence according to the information bit sequence corresponding to the TB before receiving the downlink control information, the terminal device will generate a second CRC bit sequence according to the M CBGs. The corresponding information bit sequence and the second CRC bit sequence generate second uplink data.
  • the terminal device receives configuration information from the network device, where the configuration information indicates CBG-based transmission, and the configuration information includes first information, where the first information is used to indicate the TB The maximum number of CBGs to include in .
  • an embodiment of the present application provides a communication device, the device has the function of implementing the first aspect or the terminal device in any possible design of the first aspect, or has the function of implementing the fourth aspect or the fourth aspect.
  • the function of the terminal device in any possible design of the device can be a terminal device or a chip included in the terminal device.
  • the communication apparatus may also have the function of implementing the second aspect or any possible network device in the design of the second aspect, or have the function of implementing the network device in any possible design of the third aspect or the third aspect. function, the device may be a network device or a chip included in the network device.
  • the functions of the above communication apparatus may be implemented by hardware, or by executing corresponding software in hardware, and the hardware or software includes one or more modules or units or means corresponding to the above functions.
  • the structure of the apparatus includes a processing module and a transceiver module, wherein the processing module is configured to support the apparatus to perform the corresponding functions of the terminal device in the first aspect or any design of the first aspect , or perform the corresponding function of the network device in the above-mentioned second aspect or any design of the second aspect, or perform the corresponding function of the network device in the above-mentioned third aspect or any possible design of the third aspect, or perform the above-mentioned Corresponding functions of the terminal device in the fourth aspect or any possible design of the fourth aspect.
  • the transceiver module is used to support the communication between the device and other communication devices. For example, when the device is a terminal device, it can receive downlink control information from the network device.
  • the communication device may also include a storage module, which is coupled to the processing module and stores necessary program instructions and data of the device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory
  • the memory may be integrated with the processor, or may be provided separately from the processor.
  • the structure of the apparatus includes a processor and may also include a memory.
  • the processor is coupled to the memory and can be used to execute computer program instructions stored in the memory to cause the apparatus to perform the method in the first aspect or any possible design of the first aspect above, or the second aspect or the second aspect above The method in any possible design of the above-mentioned third aspect or the third aspect, or the implementation of the fourth aspect or the fourth aspect Methods.
  • the apparatus further includes a communication interface to which the processor is coupled.
  • the communication interface can be a transceiver or an input/output interface; when the device is a chip included in the network device or a chip included in the terminal device, the communication interface can be the input of the chip /Output Interface.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, when the program or the instruction is executed by the processor , so that the chip system implements the above-mentioned first aspect or the method in any possible design of the first aspect, or realizes the above-mentioned second aspect or the method in any possible design of the second aspect, or realizes the above-mentioned first aspect.
  • the chip system further includes an interface circuit, and the interface circuit is used to exchange code instructions to the processor.
  • processors in the chip system, and the processors may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory can be integrated with the processor, or can be provided separately from the processor.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.
  • an embodiment of the present application provides a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes the computer to execute the first aspect or any one of the first aspects.
  • a method in a possible design, or a method in any possible design of performing the above-mentioned second aspect or the second aspect, or a method in any possible design of performing the above-mentioned third aspect or the third aspect Or perform the method in the fourth aspect or any possible design of the fourth aspect.
  • an embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, causes the computer to execute the method in the first aspect or any possible design of the first aspect, Or implement the method in any possible design of the second aspect or the second aspect above, or implement the method in any possible design of the third aspect or the third aspect above, or implement the fourth aspect or the above.
  • an embodiment of the present application provides a communication system, where the communication system includes a network device and at least one terminal device.
  • the communication system may further include core network equipment.
  • FIG. 1 is a schematic diagram of URLLC service data preempting time-frequency resources for transmitting eMBB service data in an embodiment of the application
  • FIG. 2 is a schematic diagram of partially canceling the uplink data transmission of the eMBB service in the embodiment of the application;
  • FIG. 3 is a schematic diagram of a network architecture of a communication system to which an embodiment of the application is applied;
  • FIG. 4 is a schematic flowchart of a method for retransmitting data provided by an embodiment of the present application
  • FIG. 5 is a schematic diagram of uplink data preparation performed by a terminal device in an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another method for retransmitting data provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 8 is another schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 10 is another schematic structural diagram of another communication apparatus provided by an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • 5G fifth generation mobile communication systems or new radio (NR) systems
  • NR new radio
  • FIG. 3 is a schematic diagram of a network architecture of a communication system provided by the present application.
  • the communication system includes a core network device 310, a radio access network device 320 and at least one terminal device (such as the terminal device 330 and the terminal device 340 in FIG. 3).
  • the terminal equipment is wirelessly connected to the wireless access network equipment, and the wireless access network equipment is wirelessly or wiredly connected to the core network equipment.
  • the core network device and the radio access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or they can be one physical device. It integrates the functions of some core network equipment and some functions of the wireless access network equipment.
  • Terminal equipment can be fixed or movable.
  • Fig. 3 is only a schematic diagram, the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Fig. 3 .
  • the embodiments of the present application do not limit the number of core network devices, wireless access network devices, and terminal devices included in the communication system.
  • the wireless access network devices mentioned in the embodiments of the present application may correspond to different devices in different communication systems, for example, the 5G system corresponds to the 5G access network devices, such as gNB or ng-eNB, The 4G system corresponds to the access network equipment in 4G, such as eNB or en-gNB.
  • the 5G system corresponds to the 5G access network devices, such as gNB or ng-eNB
  • the 4G system corresponds to the access network equipment in 4G, such as eNB or en-gNB.
  • the embodiments of the present application may be applicable to uplink signal transmission, and may also be applicable to device to device (device to device, D2D) signal transmission.
  • the sending device is a terminal device, and the corresponding receiving device is a wireless access network device.
  • the sending device is a terminal device, and the corresponding receiving device is also a terminal device.
  • the radio access network device and the terminal device can communicate through licensed spectrum, communicate through unlicensed spectrum, or communicate through licensed spectrum and unlicensed spectrum at the same time.
  • the network device and the terminal device can communicate through the frequency spectrum below 6 GHz (gigahertz, GHz), and can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz for communication at the same time.
  • This embodiment of the present application does not limit the spectrum resources used between the network device and the terminal device.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be seen that, with the evolution of the communication network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the terminal device involved in the embodiments of this application is a device with a wireless transceiver function.
  • the terminal equipment is wirelessly connected to the wireless access network equipment, so as to be connected to the communication system.
  • a terminal device may also be referred to as a terminal, user equipment (UE), a mobile station, a mobile terminal, and the like.
  • the terminal equipment can be mobile phone, tablet computer, computer with wireless transceiver function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal in industrial control, wireless terminal in unmanned driving, wireless terminal in remote surgery, smart grid wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the terminal device may also be an on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units, and the vehicle passes the built-in on-board module, on-board module, on-board component, on-board chip or on-board unit.
  • a unit may implement the methods of the present application.
  • the wireless access network device involved in the embodiments of the present application is a device in the network for connecting a terminal device to a wireless network device.
  • a radio access network device is a node in a radio access network, which may also be called a base station, or a RAN node (or device).
  • a radio access network device may be referred to as a network device. It should be noted that the network devices in the following all refer to wireless access network devices.
  • the radio access network equipment may be a base station (base station), an evolved base station (evolved NodeB, eNodeB) in an LTE system or an evolved LTE system (LTE-Advanced, LTE-A), a next-generation base station ( next generation NodeB (gNB), transmission reception point (TRP), base band unit (BBU), WiFi access point (AP), base station in future mobile communication system or WiFi system access node, etc.
  • the radio access network device may also be a module or unit that completes some functions of the base station, for example, may be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU).
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.
  • the radio access network device may be a CU node, a DU node, or an access network device including a CU node and a DU node.
  • the CU node is used to support radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP), service data adaptation protocol (service data adaptation protocol, SDAP) and other protocols;
  • DU node Used to support radio link control (radio link control, RLC) layer protocol, medium access control (medium access control, MAC) layer protocol and physical layer protocol.
  • the radio access network equipment and terminal equipment in the embodiments of the present application can be deployed on land, including indoors or outdoors, handheld or vehicle mounted; can also be deployed on water; and can also be deployed on airplanes, balloons, and artificial satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of the network device and the terminal device.
  • “Plurality” refers to two or more than two, and in view of this, “plurality” may also be understood as “at least two” in the embodiments of the present application.
  • “At least one” can be understood as one or more, such as one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C may be included. Similarly, the understanding of descriptions such as “at least one” is similar.
  • ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority, or importance of multiple objects. Moreover, the description of “first” and “second” does not limit the objects to be necessarily different.
  • the data transmission in the embodiment of the present application may be data transmission based on a code block group (code block group, CBG).
  • code block group CBG
  • a code block (code block, CB) included in a transport block (transport block, TB) can be divided into several CBGs.
  • the terminal device when the resources used to transmit the eMBB service data are preempted and the uplink transmission of the eMBB service data is partially cancelled, the terminal device only needs to retransmit the part of the CBG that was not successfully transmitted, that is, as shown in Figure 2 Retransmits CBG3 and CBG4 without retransmitting the entire TB.
  • the upstream data preparation of the canceled CBG also stops. Since the generation of the TB cyclic redundancy check (CRC) bit sequence needs to use all the bit sequences in the TB, and is not prepared before the uplink data starts to be sent, in this scenario, the uplink of some CBGs Data preparation stops causing the TB CRC bit sequence to not be successfully generated. During retransmission, since the network device will only schedule the part of the CBG that has not been successfully transmitted, the terminal device cannot successfully generate the complete TB CRC bit sequence according to the part of the CBG that was retransmitted. In view of this, the present application provides a method for retransmitting data below to solve this problem.
  • CRC cyclic redundancy check
  • FIG. 4 is a schematic flowchart of a method for retransmitting data provided by an embodiment of the present application.
  • the method includes:
  • Step S401 the network device sends the first downlink control information to the terminal device, the first downlink control information is used to schedule the initial transmission of the first uplink data, the first uplink data includes TB, and the TB is composed of a first bit sequence ( b 0 , b 1 ,...b L-1 ), L is a positive integer greater than 1.
  • the terminal device may receive the first downlink control information from the network device.
  • the first uplink data may include one TB, or may include multiple TBs. In the embodiment of the present application, the first uplink data includes one TB as an example for description.
  • Step S402 The network device sends second downlink control information to the terminal device, where the second downlink control information is used to schedule and retransmit the second bit sequence ( br , br+1 , . . . b ) in the first bit sequence L-1 ), r is a positive integer.
  • the terminal device may receive the second downlink control information from the network device.
  • the terminal device may perform corresponding uplink data preparation to generate uplink data to be sent. Specifically, the terminal device can determine how many CBs need to be divided into the TB, and how many CBs need to be divided into each CB block according to the number of bits of the first bit sequence constituting the TB and the number of bits of the TB CRC bit sequence Bits from the first bit sequence. If the TB needs to be divided into X CBs, as shown in Figure 5, the terminal device can divide the first bit sequence into X parts, and concatenate the TB CRC bit sequence at the end of the first bit sequence , that is, concatenated after the Xth part of the first bit sequence.
  • the terminal device can generate a corresponding CB CRC bit sequence for each CB bit sequence, the length of each CB CRC bit sequence can be the same, and then concatenate the generated CB CRC bit sequence after the corresponding CB bit sequence to form a Complete CB.
  • the terminal device can sequentially concatenate the TB CRC bit sequence and the CB CRC bit sequence corresponding to the last CB bit sequence after the last CB bit sequence to obtain the last complete CB.
  • the terminal device can concatenate the X CBs obtained after the above processing to obtain uplink data to be sent.
  • the terminal device before concatenating the X CBs, can also perform channel coding, rate matching (bit interleaving) and other processing on each CB, and can also perform symbol mapping after concatenating the X CBs. , and then obtain the uplink data to be sent, which will not be described here. It should be noted that the embodiments of the present application do not specifically limit the specific timing for the terminal device to generate the TB CRC bit sequence, as long as the TB CRC bit sequence is prepared before the last CB performs channel coding, rate matching and other transmission operations.
  • the terminal device may also divide the X CBs into N CBGs according to the configured maximum number of CBGs, and each CBG may include 0 or 1 or Multiple CBs, where N is a positive integer.
  • the terminal device when one or more CBs in the TB are not successfully transmitted, the terminal device does not need to retransmit the entire TB, but can only retransmit the CBGs where those CBs that were not successfully transmitted are located .
  • X CBs may be generated according to the first bit sequence constituting the TB, and the X CBs may be further divided into N CBGs.
  • each CB also includes a CB CRC bit sequence.
  • the last CB also includes the TB CRC bit sequence and the CB CRC bit sequence.
  • the uplink data to be sent is obtained.
  • the relationship between TB, CB and CBG can also be understood as, the TB includes X CBs, or the TB includes N CBGs, or the TB consists of X CBs , or the TB consists of N CBGs.
  • the network device may send configuration information to the terminal device, where the configuration information is used to indicate CBG-based transmission.
  • the configuration information may further include first information, where the first information indicates the maximum number T of CBGs included in the TB, and the N is less than or equal to the maximum number T of CBGs indicated in the first information. That is, in this embodiment of the present application, the network device may enable CBG-based data transmission by delivering the above configuration information to the terminal device, and configure the CBG included in each TB by using the first information included in the above configuration information maximum number of .
  • the network device sends third downlink control information to the terminal device after sending the first downlink control information to the terminal device, the third downlink control information indicates to cancel the part of the TB Transmission, for example, may be to cancel the transmission of a part of the CBG in the TB, then the above-mentioned uplink data preparation process may be interrupted, and the TB CRC bit sequence may not be successfully generated.
  • the third downlink control information can be understood as a cancellation indication (cancellation indication, CI), and can also be understood as scheduling information corresponding to another uplink transmission, and the priority of the another uplink transmission is higher than the priority corresponding to the transmission of the TB level, the other uplink transmission may be uplink data transmission or uplink control information transmission, which is not specifically limited.
  • CI cancellation indication
  • the other uplink transmission may be uplink data transmission or uplink control information transmission, which is not specifically limited.
  • the network device may schedule retransmission of the canceled data, that is, as described in the above step S402, the network device may send the second downlink control information to the terminal device, the second downlink The control information is used to schedule retransmission of the second sequence of bits of the first sequence of bits.
  • the second bit sequence refers to the bit sequence corresponding to the part of the CBG whose transmission is cancelled in the TB. It should be noted that the bit sequence corresponding to the CBG specifically refers to those bits included in the CBG from the first bit sequence , does not include the bits in the CB CRC bit sequence or the bits in the TB CRC bit sequence, which will not be described in detail below.
  • the part of the CBG whose transmission is canceled includes at least the last CBG in the TB, for example, may include all one or more consecutive CBGs following the TB.
  • the terminal device has successfully generated the uplink data and sent it to the network device, but the network device has not received at least one CBG in the TB, thus causing the network device to perform the above step S402, Retransmission of the second sequence of bits in the first sequence of bits is scheduled.
  • the second bit sequence refers to a bit sequence corresponding to at least one CBG that has not been received by the network device. It should be noted that, here, the network device "does not receive" at least one CBG in the TB may mean that, for each CBG in the at least one CBG, the network device does not receive one or more CBGs included in the CBG.
  • the upstream data preparation process is not interrupted, so the terminal device successfully generates the TB CRC bit sequence.
  • the at least one CBG not received by the network device includes at least the last CBG in the TB, For example, one or more contiguous CBGs later in the TB may be included.
  • the second downlink control information may include second information, where the second information is used to indicate the second bit sequence.
  • the second information may be used to indicate M CBGs in the TB, and the bit sequence corresponding to the M CBGs is the second bit sequence.
  • M is a positive integer less than N, that is, the entire TB includes N CBGs in total
  • the M CBGs refer to some of the CBGs included in the TB
  • the M CBGs include the last CBG among the N CBGs. It can be understood that the M CBGs refer to the part of the CBG that needs to be retransmitted in the TB. It may be the CBG that the terminal device failed to send successfully because the previously scheduled uplink data transmission was partially canceled, or the network The CBG that the network device fails to receive due to the device's failure to decode is not limited.
  • the second information may be a bitmap (bitmap) with a length of T bits, and the T bits in the bitmap respectively correspond to the maximum possible T CBGs included in the TB.
  • bitmap bitmap
  • T bits in the bitmap respectively correspond to the maximum possible T CBGs included in the TB.
  • the second downlink control information may further include third information, where the third information is used to indicate retransmission, that is, the uplink data transmission scheduled by the second downlink control information is retransmission.
  • CBGs For example, as shown in FIG. 2 , several CBs included in one TB of the eMBB service are divided into 4 CBGs, which are CBG1 to CBG4 respectively.
  • the time-frequency resources used to transmit CBG3 and CBG4 are preempted by the data transmission of the URLLC service, which results in the partial cancellation of the initial transmission of the TB.
  • it may be the uplink of CBG3 and CBG4 in the TB.
  • the network device may schedule the retransmission of the TB, and indicate through the first information that the two CBGs, CBG3 and CBG4, need to be retransmitted.
  • M 2
  • the M CBGs are CBG3 and CBG4.
  • FIG. 2 is only an example, and FIG. 2 can be applied in any scenario where low-priority services can preempt transmission resources by high-priority services, resulting in partial or complete cancellation of transmission of low-priority services.
  • Preemption can occur between different service transmissions of the same terminal device, or between different terminal devices that perform different service transmissions.
  • the network device will indicate the priority of the service through a priority indication.
  • the network device will issue a CI to instruct the terminal device to cancel part or all of the transmission.
  • Step S403 the terminal device generates the second uplink data according to the second bit sequence and the first CRC bit sequence, or generates the second uplink data according to the second bit sequence and the second CRC bit sequence.
  • the first CRC bit sequence is generated according to the second bit sequence, and specifically refers to the TB CRC bit sequence generated by inputting the second bit sequence into the CRC generation module.
  • the first CRC bit sequence is generated according to the bit sequences corresponding to the M CBGs, and refers to the TB CRC bit sequence generated by inputting the bit sequences corresponding to the M CBGs into the CRC generation module,
  • the bit sequence corresponding to the M CBGs refers to a sequence composed of all bits from the TB in all the CBs corresponding to the M CBGs. Since the M CBGs are partial CBGs included in the TB, the first CRC bit sequence may also be referred to as a partial (partial) TB CRC bit sequence, or the first CRC bit sequence may also have other names. The application is not limited.
  • the second CRC bit sequence is generated according to the first bit sequence, and specifically refers to the TB CRC bit sequence generated by inputting the first bit sequence into the CRC generation module.
  • the second CRC bit sequence is generated according to the entire TB, and refers to the TB CRC bit sequence generated by inputting the bit sequence corresponding to the entire TB into the CRC generation module.
  • the second CRC bit sequence may also be referred to as the TB CRC bit sequence.
  • this step S403 refers to the uplink data preparation process performed by the terminal device after receiving the second downlink control information.
  • the terminal device can directly generate the first CRC bit sequence according to the second bit sequence, and then generate the first CRC bit sequence according to the second bit sequence and The generated first CRC bit sequence generates the second uplink data to be sent.
  • the specific process please refer to the above description about FIG. 5 , which will not be repeated here.
  • the terminal device can generate the second uplink data to be sent according to the second bit sequence and the first CRC bit sequence. It should be noted that if the terminal device also receives the third downlink control information from the network device before receiving the second downlink control information, it may indicate that the terminal device is in the process of preparing the uplink data for the data transmission scheduled by the first downlink control information. , the second CRC bit sequence has not been generated from the first bit sequence.
  • the terminal device can and the second CRC bit sequence to generate the second uplink data to be sent. It should be noted that if the terminal device does not receive the third downlink control information from the network device before receiving the second downlink control information, it may indicate that the terminal device is in the uplink data preparation process of the data transmission scheduled by the first downlink control information. , the second CRC bit sequence has been generated from the first bit sequence. For example, it is possible that the terminal device has performed a complete transmission of the first bit sequence, but due to the decoding failure of the network device, part of the CBG in the TB needs to be retransmitted.
  • the terminal device can generate the first CRC bit sequence according to the second bit sequence, and then generate the first CRC bit sequence according to the second bit sequence.
  • the bit sequence and the generated first CRC bit sequence generate the second uplink data to be sent. If the terminal device has generated the second CRC bit sequence according to the first bit sequence before receiving the second downlink control information, then the terminal device can generate the to-be-sent first bit sequence according to the second bit sequence and the previously generated second CRC bit sequence. 2.
  • Uplink data Similarly, for the specific process of generating the second uplink data by the terminal device according to the second bit sequence, the first CRC bit sequence or the second CRC bit sequence, reference may be made to the above description about FIG. 5 , which will not be repeated here.
  • Step S404 the terminal device sends the second uplink data to the network device.
  • the network device may receive the second uplink data sent by the terminal device, and decode the second uplink data.
  • the network device may determine that the second uplink data is generated according to the second bit sequence and the first CRC bit sequence. If the network device does not send the third downlink control information to the terminal device before sending the second downlink control information, indicating to cancel the partial transmission of the first bit sequence, the network device may determine that the second uplink data is based on the second bit sequence and the first bit sequence. Two CRC bit sequences are generated.
  • the uplink data preparation process of the terminal device is interrupted, the second CRC bit sequence is not successfully generated, and the network device The second CRC bit sequence is also not received.
  • the uplink data preparation process of the terminal device is normally performed, and the terminal device can successfully generate the second CRC according to the first bit sequence. bit sequence, and generate corresponding uplink data according to the first bit sequence and the second CRC bit sequence, and send it to the network device.
  • the network device may receive the second CRC bit sequence generated by the terminal device according to the first bit sequence. It can be understood that the fact that the network device here receives the second CRC bit sequence does not mean that the network device can correctly demodulate and decode the second CRC bit sequence, but only means that the terminal device has sent the second CRC bit sequence to the network device. .
  • the network device can also judge whether the second uplink data is based on the second bit sequence and the first CRC bit sequence according to whether the second CRC bit sequence generated by the terminal device according to the first bit sequence is received. is also generated according to the second bit sequence and the second CRC bit sequence.
  • the network device may determine that the second uplink data is based on the second bit sequence and the first bit sequence. CRC bit sequence generated. Conversely, if the network device has received the second CRC bit sequence generated according to the first bit sequence before sending the second downlink control information, the network device can determine that the second uplink data is based on the second bit sequence and the second CRC bit sequence. sequence generated.
  • the network device receiving the second CRC bit sequence generated according to the first bit sequence before sending the second downlink control information may indicate that the network device previously scheduled the complete transmission of the TB, and sent the data from the terminal The device received the TB's signal, but did not properly demodulate the TB, eg, the decoding of one or more CBs included in the TB may have failed. Because if the network device correctly demodulates and decodes the TB previously received from the terminal device, the network device will no longer send the second downlink control information, and schedule the partial retransmission of the TB for the terminal device.
  • CB-CRC false alarm means that a certain CB is actually solved incorrectly, but the CRC check passes, and the receiving device will mistakenly think that the CB is solved correctly. If there is a TB-CRC, it is equivalent to double insurance. If all the CB-CRCs are verified correctly, but there are actually one or more CB-CRC false alarms, that is to say, one or more CBs are actually not correct. , through the TB CRC, you can know that this TB is not really all unpaired, there must be at least one CB uncorrected, and the receiving device can notify the sending device to resend the TB.
  • the terminal device when the network device schedules the retransmission of a part of the CBG in a TB, the terminal device can retransmit the second bit sequence as required, as well as the first CRC bit sequence or the second CRC bit sequence. bit sequence to generate the second uplink data to be sent, and send it to the network device.
  • the gain of the TB CRC can be obtained as much as possible, the performance loss caused by the false alarm of the CB CRC can be effectively reduced, and the complexity of the terminal device implementation can be reduced at the same time.
  • the above technical solution enables the terminal device to successfully retransmit part of the CBG, and the terminal device can only perform uplink according to the part of the CBG that needs to be retransmitted.
  • For data preparation there is no need to prepare uplink data according to the entire TB, thereby reducing the complexity of terminal implementation.
  • FIG. 6 is a schematic diagram of another method for retransmitting data provided by this application, and the method includes:
  • Step S601 the network device generates downlink control information, the downlink control information is used to schedule first uplink data, the first uplink data includes TB, the TB includes N CBGs, and the downlink control information includes second information and third information , the second information is used to indicate M CBGs in the N CBGs, the M CBGs include the last CBG of the N CBGs, and the third information is used to indicate retransmission, N and M are both positive integer.
  • the first uplink data may include one TB, or may include multiple TBs. In the embodiment of the present application, the first uplink data includes one TB as an example for description.
  • the uplink data transmission scheduled by the downlink control information is a retransmission of the TB.
  • the second information is used to indicate the M CBGs that need to be retransmitted in the TB.
  • M is equal to N. Conversely, if the network device has received the N CBGs before sending the downlink control information, but at least one CBG has not been successfully decoded among the N CBGs, M is less than or equal to N.
  • the operation of scheduling retransmission by the network device is restricted.
  • the network device For a TB, if the network device has not successfully scheduled the transmission of the entire TB before the retransmission of the TB is scheduled this time, that is, before sending the downlink control information, the network device has not received any of the N CBGs included in the TB. At least one CBG, this scheduling does not allow only the retransmission of a part of the CBG in the TB, but needs to schedule the retransmission of the entire TB.
  • the network device Because if the network device has not successfully scheduled the transmission of the entire TB before the retransmission of the TB is scheduled this time, it means that the terminal device has not yet scheduled the retransmission of the TB this time.
  • the transmission of the entire TB scheduled during the initial transmission may be partially or completely cancelled, resulting in the suspension of the uplink data preparation process, and the terminal device does not successfully generate the TB CRC bit sequence.
  • the terminal device cannot also use the bit sequence in the scheduled part of the CBG in the retransmission scheduled this time. Generate a TB CRC bit sequence, which will affect the generation of uplink data of the terminal device, resulting in the terminal device not being able to obtain the TB CRC gain.
  • the network device schedules the transmission of the entire TB before the retransmission of the TB is scheduled this time, and the scheduled transmission of the entire TB is not partially or completely canceled, but the network device fails due to a decoding error or other reasons, the network device At least one CBG among the N CBGs included in the received TB is not successfully decoded and thus requires retransmission, that is, the network device receives the N CBGs before sending the downlink control information, but the If at least one CBG in the N CBGs is not successfully decoded, the network device can schedule retransmission of a part of the CBG in the TB this time, and can also schedule retransmission of the entire TB, which is not limited.
  • the terminal device if the network device has successfully scheduled the transmission of the entire TB before, the terminal device has generated the TB CRC bit sequence according to the information bit sequence corresponding to the TB in the previously scheduled transmission of the entire TB. Then, regardless of whether the network device schedules only the retransmission of part of the CBG in the TB or the retransmission of the entire TB, the terminal device can generate the second uplink data according to the previously generated TB CRC bit sequence, and then obtain the TB-CRC gain.
  • Step S602 the network device sends downlink control information to the terminal device.
  • the terminal device can receive the downlink control information from the network device.
  • the downlink control information includes second information, where the second information is used to indicate the M CBGs that need to be retransmitted in the current scheduled data transmission. Since the TB includes a total of N CBGs, if M is equal to N, it means that the downlink control information schedules the retransmission of the entire TB, or the downlink control information schedules the retransmission of all the CBGs included in the TB. Retransmission.
  • the terminal device may perform data preparation according to the normal process. Specifically, the terminal device may generate a second CRC bit sequence according to the information bit sequence corresponding to the TB, and then generate the second uplink data according to the bit sequence corresponding to the TB and the generated second CRC bit sequence, and send it to Internet equipment.
  • step S603 If M is less than N, it indicates that the downlink control information schedules retransmission of part of the CBG in the TB. In this case, after receiving the downlink control information, the terminal device may perform corresponding detection on the rationality of scheduling the retransmission by the network device. For details, please refer to the description of step S603 below. It should be noted that the description in step S603 is only limited to the case where M is less than N, and the first information indicates the case of scheduling partial CBG retransmissions in the TB.
  • Step S603 If the terminal device does not generate a second CRC bit sequence according to the information bit sequence corresponding to the TB before receiving the downlink control information, the terminal device ignores the downlink control information.
  • the terminal device ignoring the downlink control information may also be that the terminal device discards the downlink control information. This means that before generating the second CRC bit sequence according to the information bit sequence corresponding to the TB, the terminal device does not expect to receive such downlink control information, that is, does not expect to receive the information used to schedule the retransmission of part of the CBG in the TB. Downlink control information. Alternatively, it can also be understood that the terminal device does not expect the network device to schedule the retransmission of a part of the CBG in the TB before successfully scheduling the transmission of the entire TB.
  • the terminal device may also report a scheduling error indication to the network device.
  • the terminal device can use the information bit sequence corresponding to the M CBGs scheduled this time and The second CRC bit sequence that has been generated before, generates second uplink data, and sends it to the network device.
  • the network device successfully schedules the transmission of the entire TB. In this entire TB transmission, the terminal device has generated the second CRC bit according to the information bit sequence corresponding to the TB during data preparation. sequence.
  • the network device since the network device decodes at least one CBG incorrectly in the TB, the network device needs to schedule the retransmission of the part of the CBG in the TB where the decoding error occurs.
  • the terminal device can only The information bit sequences corresponding to the M CBGs that need to be retransmitted, and the second CRC bit sequence generated in the process of transmitting the entire TB before, perform uplink data preparation to generate the second uplink data.
  • the network device may also send configuration information to the terminal device.
  • This configuration information is used to indicate CBG-based transmission.
  • the configuration information may further include first information, where the first information indicates the maximum number of CBGs included in the TB. That is, in this embodiment of the present application, the CBG-based data transmission can be enabled by delivering the above configuration information to the terminal device, and the number of CBGs included in each TB can be configured through the first information included in the above configuration information. number. Further, after receiving the configuration information from the network device, the terminal device may divide several CBs included in the TB into the N CBGs according to the maximum number of CBGs included in the TB indicated by the first information . It can be understood that the N value is less than or equal to the maximum number of CBGs indicated in the first information.
  • the network equipment is required to schedule the transmission of a complete TB at least once before scheduling partial CBG retransmission. , so that the terminal device can realize the retransmission of the partial CBG scheduled this time based on the second CRC bit sequence generated during the previous transmission of the complete TB, and effectively reduce the change of the terminal device processing strategy.
  • FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 700 includes a transceiver module 710 and a processing module 720 .
  • the communication apparatus can be used to implement the functions related to the terminal device in any of the foregoing method embodiments.
  • the communication device may be a terminal device, such as a handheld terminal device or a vehicle-mounted terminal device; the communication device may also be a chip or circuit included in the terminal device, or a device including the terminal device, such as various types of vehicles.
  • the transceiver module 710 is configured to receive the first downlink control information from the network equipment, the first downlink control information.
  • the row control information is used to schedule the initial transmission of the first uplink data, where the first uplink data includes a TB, and the TB is composed of a first bit sequence (b 0 , b 1 , . . . b L-1 ).
  • the transceiver module 710 is further configured to receive second downlink control information from the network device, where the second downlink control information is used to schedule and retransmit the second bit sequence ( br , br+1 , . . . ) in the first bit sequence.
  • the processing module 720 is configured to generate the second uplink data according to the second bit sequence and the first CRC bit sequence, or generate the second uplink data according to the second bit sequence and the second CRC bit sequence, wherein the first CRC bit sequence is based on the The second bit sequence is generated, and the second CRC bit sequence is generated according to the first bit sequence.
  • the transceiver module 710 is further configured to send the second uplink data to the network device.
  • the processing module 720 is specifically configured to, if before receiving the second downlink control information, the transceiver module 710 also receives the third downlink control information from the network device, the third downlink control information indicates to cancel the first downlink control information.
  • the second uplink data is generated according to the second bit sequence and the first CRC bit sequence.
  • the processing module 720 is specifically configured to, if before receiving the second downlink control information, the second CRC bit sequence has not been generated according to the first bit sequence, the terminal device will generate the second CRC bit sequence according to the second bit sequence and the first CRC bit sequence. The bit sequence generates the second upstream data.
  • the processing module 720 is specifically configured to, if the transceiver module 710 does not receive the third downlink control information from the network device before receiving the second downlink control information, the third downlink control information indicates to cancel the first downlink control information.
  • the second uplink data is generated according to the second bit sequence and the second CRC bit sequence.
  • the processing module 720 is specifically configured to, if before receiving the second downlink control information, the second CRC bit sequence has been generated according to the first bit sequence, then according to the second bit sequence and the second CRC bit sequence The sequence generates the second upstream data.
  • the transceiver module 710 is further configured to receive configuration information from a network device, where the configuration information indicates CBG-based transmission, and the configuration information further includes first information, where the first information indicates the TB The maximum number of CBGs to include in .
  • the transceiver module 710 is configured to receive downlink control information from the network equipment, where the downlink control information is used to schedule the first uplink data , the first uplink data includes TB, the TB includes N CBGs, the downlink control information includes second information and third information, the second information is used to indicate M CBGs in the N CBGs, the The M CBGs include the last CBG among the N CBGs, the third information is used to indicate retransmission, the N and M are positive integers, and M is less than N; the processing module 720 is configured to: Before module 710 receives the downlink control information, the terminal device does not generate a second CRC bit sequence according to the information bit sequence corresponding to the TB, and then the downlink control information is ignored.
  • the processing module 720 is further configured to: if the terminal device has generated a second CRC bit sequence according to the information bit sequence corresponding to the TB before receiving the downlink control information, the terminal device The information bit sequence and the second CRC bit sequence corresponding to the M CBGs are used to generate the second uplink data.
  • the transceiver module 710 is further configured to receive configuration information from a network device, where the configuration information indicates CBG-based transmission, and the configuration information includes first information, where the first information is used to indicate the The maximum number of CBGs included in the TB.
  • the processing module 720 involved in the communication apparatus may be implemented by at least one processor or a processor-related circuit component, and the transceiver module 710 may be implemented by at least one transceiver or a transceiver-related circuit component or a communication interface.
  • the operations and/or functions of the respective modules in the communication device are respectively to implement the corresponding flow of the method shown in FIG. 4 , FIG. 5 or FIG. 6 , and are not repeated here for the sake of brevity.
  • the communication device may further include a storage module, which may be used to store data and/or instructions, and the transceiver module 710 and/or the processing module 720 may read the data and/or instructions in the access module, Thereby, the communication device can implement the corresponding method.
  • the memory module can be implemented, for example, by at least one memory.
  • the above-mentioned storage module, processing module, and transceiver module may exist separately, or all or part of the modules may be integrated, for example, the storage module and the processing module are integrated, or the processing module and the transceiver module are integrated.
  • the communication device may be a terminal device, and the communication device may be used to implement the functions related to the terminal device in any of the foregoing method embodiments.
  • the terminal device takes a mobile phone as an example.
  • the terminal device includes a processor, and may also include a memory, and of course, may also include a radio frequency circuit, an antenna, an input and output device, and the like.
  • the processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, and process data of software programs.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 8 only one memory and processor are shown in FIG. 8 . In an actual end device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with a transceiver function may be regarded as a transceiver unit of the terminal device, and the processor with a processing function may be regarded as a processing unit of the terminal device.
  • the terminal device includes a transceiver unit 810 and a processing unit 820 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 810 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 810 may be regarded as a transmitting unit, that is, the transceiver unit 810 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • transceiving unit 810 is configured to perform the sending and receiving operations on the terminal device side in the above method embodiments
  • processing unit 820 is configured to perform other operations on the terminal device in the above method embodiments except the transceiving operations.
  • FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the communication device 900 includes a transceiver module 910 and a processing module 920 .
  • the communication apparatus may be used to implement the functions related to the network device in any of the foregoing method embodiments.
  • the communication apparatus may be a network device or a chip or circuit included in the network device.
  • the transceiver module 910 is configured to send the first downlink control information to the terminal device, the first downlink The control information is used to schedule the initial transmission of the first uplink data, where the first uplink data includes a TB, and the TB consists of a first bit sequence (b 0 , b 1 , ⁇ b L-1 ).
  • the transceiver module 910 is further configured to send second downlink control information to the terminal device, where the second downlink control information is used to schedule and retransmit the second bit sequence in the first bit sequence, ( br , br+1 , . . .
  • the processing module 920 is configured to receive second uplink data from the terminal device through the transceiver module 910, where the second uplink data is generated according to the second bit sequence and the first CRC bit sequence, or the second uplink data is generated according to the second bit sequence and the first CRC bit sequence.
  • the bit sequence and the second CRC bit sequence are generated, wherein the first CRC bit sequence is generated according to the second bit sequence, and the second CRC bit sequence is generated according to the first bit sequence.
  • the transceiver module 910 sends third downlink control information to the terminal device, where the third downlink control information indicates to cancel the partial transmission of the first bit sequence, then process the Module 920 may determine that the second uplink data is generated according to the second bit sequence and the first CRC bit sequence.
  • the processing module 920 may determine that the second uplink data is based on The second bit sequence and the first CRC bit sequence are generated.
  • processing Module 920 may determine that the second uplink data is generated according to the second bit sequence and the second CRC bit sequence.
  • the processing module 920 may determine that the second uplink data is based on the first bit sequence. A bit sequence and a second CRC bit sequence are generated.
  • the transceiver module 910 is further configured to send configuration information to the terminal device, where the configuration information indicates CBG-based transmission, the configuration information includes first information, and the first information indicates that the TB includes The maximum number of CBGs.
  • the processing module 920 is configured to generate downlink control information, where the downlink control information is used to schedule first uplink data, the first The uplink data includes a TB, the TB includes N CBGs, the downlink control information includes second information and third information, and the second information is used to indicate M CBGs among the N CBGs, and among the M CBGs Including the last CBG in the N CBGs, the third information is used to indicate retransmission, and N and M are both positive integers; wherein, if the transceiver module 910 does not receive the N CBGs before sending the downlink control information For at least one CBG in the CBG, the M is equal to N; the transceiver module 910 is configured to send the downlink control information to the terminal device.
  • M is less than or equal to N.
  • the transceiver module 910 is further configured to send configuration information to the terminal device, where the configuration information is used to indicate CBG-based transmission, the configuration information includes first information, and the first information is used to indicate the The maximum number of CBGs included in the TB.
  • the processing module 920 involved in the communication apparatus may be implemented by at least one processor or processor-related circuit components
  • the transceiver module 910 may be implemented by at least one transceiver or transceiver-related circuit components or communication interfaces.
  • the operations and/or functions of the respective modules in the communication device are respectively to implement the corresponding flow of the method shown in FIG. 4 , FIG. 5 or FIG. 6 , and are not repeated here for the sake of brevity.
  • the communication device may further include a storage module, which may be used to store data and/or instructions, and the transceiver module 910 and/or the processing module 920 may read the data and/or instructions in the access module, Thereby, the communication device can implement the corresponding method.
  • the memory module can be implemented, for example, by at least one memory.
  • the above-mentioned storage module, processing module, and transceiver module may exist separately, or all or part of the modules may be integrated, for example, the storage module and the processing module are integrated, or the processing module and the transceiver module are integrated.
  • FIG. 10 is another schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the communication apparatus may specifically be a network device, such as a base station, for implementing the functions related to the network device (eg, the first network device or the target network device) in any of the foregoing method embodiments.
  • the network device 1000 includes: one or more radio frequency units, such as a remote radio unit (remote radio unit, RRU) 1001 and one or more baseband units (baseband unit, BBU) 1002.
  • the RRU 1001 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 10011 and a radio frequency unit 10012.
  • the RRU 1001 part is mainly used for the transceiver of radio frequency signals and the conversion of radio frequency signals and baseband signals.
  • the part of the BBU 1002 is mainly used to perform baseband processing, control the base station, and the like.
  • the RRU 1001 and the BBU 1002 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 1002 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spectrum spreading, and the like.
  • the BBU (processing unit) 1002 may be used to control the base station to perform the operation procedures related to the network device in the foregoing method embodiments.
  • the BBU 1002 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) with a single access indication, or may respectively support a wireless access network with different access standards.
  • Wireless access network (such as LTE network, 5G network or other network).
  • the BBU 1002 may also include a memory 10021 and a processor 10022, and the memory 10021 is used to store necessary instructions and data.
  • the processor 10022 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the sending operation in the foregoing method embodiments.
  • the memory 10021 and the processor 10022 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • An embodiment of the present application further provides a chip system, including: a processor, where the processor is coupled with a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the The chip system implements a method corresponding to a terminal device or a method corresponding to a network device in any of the foregoing method embodiments.
  • the number of processors in the chip system may be one or more.
  • the processor can be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • the system-on-chip may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), It can also be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller).
  • controller unit, MCU it can also be a programmable logic device (PLD) or other integrated chips.
  • each step in the above method embodiments may be implemented by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the method steps disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • Embodiments of the present application further provide a computer-readable storage medium, where computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer is made to execute any of the foregoing method embodiments method in .
  • Embodiments of the present application further provide a computer program product, which, when the computer reads and executes the computer program product, causes the computer to execute the method in any of the above method embodiments.
  • An embodiment of the present application further provides a communication system, where the communication system includes a network device and at least one terminal device.
  • the communication system may further include a core network device.
  • processors mentioned in the embodiments of the present application may be a CPU, other general-purpose processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SCRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.

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Abstract

一种重传数据的方法及装置,该方法包括:当网络设备调度一个TB中的部分比特序列的重传时,终端设备可以根据需要重传部分对应的第二比特序列以及第一CRC比特序列或第二CRC比特序列,生成第二上行数据,并发送给网络设备,其中,第一CRC比特序列是根据第二比特序列生成的,第二CRC比特序列是根据所述TB对应的第一比特序列生成的。如此,可以尽可能的获取CRC的增益,有效减小CRC虚警带来的性能损失,同时又可以降低终端设备实现的复杂度。

Description

一种重传数据的方法及装置
相关申请的交叉引用
本申请要求在2020年08月07日提交中国国家知识产权局、申请号为202010791666.9、申请名称为“一种重传数据的方法及装置”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
本申请涉及无线通信技术领域,尤其涉及一种重传数据的方法及装置。
背景技术
第五代(the 5th generation,5G)移动通信系统可以同时支持多种业务类型的业务,如增强型移动宽带(enhanced mobile broadband,eMBB)业务、高可靠低时延通信(ultra-reliable and low-latency communications,URLLC)业务、海量机器类型通信(massive machine type communication,mMTC)业务。
由于URLLC业务的数据的突发性,为了提高系统的资源利用率,网络设备通常不会为URLLC业务的数据传输预留资源。当网络设备或终端设备有URLLC业务数据待发送时,如果此时没有空闲的时频资源,为了满足URLLC业务的超短时延需求,网络设备可以使用抢占的方式为URLLC业务分配资源。抢占可以发生在同一终端设备的不同业务传输之间,也可以发生在进行不同业务传输的不同终端设备之间。
如图1所示,由于eMBB业务的调度时间单元比较长,URLLC业务的调度时间单元比较短,网络设备可以在已经分配的、用于传输eMBB业务数据的时频资源上选择部分或全部时频资源用于传输URLLC业务数据。对于eMBB业务的数据传输来说,其资源一旦开始被抢占,那么被抢占的符号以及被抢占的符号之后的符号上eMBB业务的数据传输均被取消。在这一场景下,被取消的eMBB业务的数据应如何进行重传,是一个需要解决的问题。
发明内容
本申请实施例中的一种重传数据的方法及装置,用于在基于CBG的传输中实现部分CBG的重传。
第一方面,本申请实施例提供一种重传数据的方法,该方法可由终端设备执行,也可以由配置于终端设备的部件(例如芯片或者电路)执行,在本申请下文的描述中,将以终端设备执行该方法为例进行说明。
该方法可以包括:终端设备接收来自网络设备的第一下行控制信息,该第一下行控制信息用于调度第一上行数据的初传,该第一上行数据包括TB,该TB由第一比特序列(b 0,b 1,……b L-1)组成;终端设备接收来自网络设备的第二下行控制信息,该第二下行控制信息用于调度重传第一比特序列中的第二比特序列(b r,b r+1,……b L-1),r为正整数;终端设备根据第二比特序列和第一CRC比特序列生成第二上行数据,或者根据第二比特序列 和第二CRC比特序列生成第二上行数据,其中,第一CRC比特序列是根据第二比特序列生成的,第二CRC比特序列是根据第一比特序列生成的;终端设备将第二上行数据发送给网络设备。
采用上述技术方案,当终端设备被调度一个TB中部分比特序列的重传时,终端设备可以根据需要传输的部分比特序列以及第一CRC比特序列或第二CRC比特序列,生成需要发送的第二上行数据,并发送给网络设备。如此,可以尽可能的获取TB CRC的增益,有效减小CB CRC虚警带来的性能损失,同时又可以降低终端设备实现的复杂度。
在第一方面的一种可能的设计中,如果在接收第二下行控制信息之前,终端设备还接收了来自网络设备的第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则终端设备根据第二比特序列和第一CRC比特序列生成第二上行数据。
在第一方面的一种可能的设计中,如果在接收第二下行控制信息之前,终端设备还没有根据第一比特序列生成第二CRC比特序列,则终端设备根据第二比特序列和第一CRC比特序列生成第二上行数据。
在第一方面的一种可能的设计中,如果在接收第二下行控制信息之前,终端设备没接收到来自网络设备的第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则终端设备根据第二比特序列和第二CRC比特序列生成第二上行数据。
在第一方面的一种可能的设计中,如果在接收第二下行控制信息之前,终端设备已经根据第一比特序列生成了第二CRC比特序列,则终端设备根据第二比特序列和第二CRC比特序列生成第二上行数据。
在第一方面的一种可能的设计中,终端设备接收来自网络设备的配置信息,该配置信息指示基于CBG的传输,该配置信息中包括第一信息,该第一信息指示所述TB中包括的CBG的最大个数。
第二方面,本申请实施例提供一种重传数据的方法,该方法可由网络设备执行,也可以由配置于网络设备的部件(例如芯片或者电路)执行,在本申请下文的描述中,将以网络设备执行该方法为例进行说明。
该方法可以包括:网络设备向终端设备发送第一下行控制信息,该第一下行控制信息用于调度第一上行数据的初传,该第一上行数据包括TB,该TB由第一比特序列(b 0,b 1,……b L-1)组成;网络设备向终端设备发送第二下行控制信息,该第二下行控制信息用于调度重传第一比特序列中的第二比特序列,(b r,b r+1,……b L-1),r为正整数;网络设备接收来自终端设备的第二上行数据,该第二上行数据是根据第二比特序列和第一CRC比特序列生成的,或者该第二上行数据是根据第二比特序列和第二CRC比特序列生成的,其中,第一CRC比特序列是根据第二比特序列生成的,第二CRC比特序列是根据第一比特序列生成的。
在第二方面的一种可能的设计中,如果在发送第二下行控制信息之前,网络设备向终端设备发送了第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则第二上行数据是根据第二比特序列和第一CRC比特序列生成的。
在第二方面的一种可能的设计中,如果在发送第二下行控制信息之前,网络设备还没有接收到根据第一比特序列生成的第二CRC比特序列,则第二上行数据是根据第二比特序列和第一CRC比特序列生成的。
在第二方面的一种可能的设计中,如果在发送第二下行控制信息之前,网络设备没有 向终端设备发送第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则第二上行数据是根据第二比特序列和第二CRC比特序列生成的。
在第二方面的一种可能的设计中,如果在发送第二下行控制信息之前,网络设备已接收到根据第一比特序列生成的第二CRC比特序列,则第二上行数据是根据第一比特序列和第二CRC比特序列生成的。
在第二方面的一种可能的设计中,所述方法还包括:网络设备向终端设备发送配置信息,该配置信息指示基于CBG的传输,该配置信息中包括第一信息,该第一信息指示所述TB中包括的CBG的最大个数。
第三方面,本申请实施例提供一种重传数据的方法,该方法可由网络设备执行,也可以由配置于网络设备的部件(例如芯片或者电路)执行,在本申请下文的描述中,将以网络设备执行该方法为例进行说明。
该方法可以包括:网络设备生成下行控制信息,该下行控制信息用于调度第一上行数据,该第一上行数据包括TB,该TB包括N个CBG,该下行控制信息中包括第二信息和第三信息,该第二信息用于指示所述N个CBG中的M个CBG,所述M个CBG中包括所述N个CBG中的最后一个CBG,该第三信息用于指示重传,N和M均为正整数;其中,如果在发送所述下行控制信息之前网络设备未接收所述N个CBG中的至少一个CBG,则所述M等于N;网络设备向终端设备发送所述下行控制信息。
采用上述技术方案,对网络设备的调度重传的操作进行限制,要求网络设备在调度部分CBG的传输之前,应至少进行过一次完整的TB的传输,如此,可使终端设备能够基于之前进行完整的TB的传输的过程中生成的第二CRC比特序列实现本次部分CBG的重传。
在第三方面的一种可能的设计中,如果在发送所述下行控制信息之前网络设备接收了所述N个CBG,但是所述N个CBG中的至少一个CBG未被成功译码,则M小于或等于N。
在第三方面的一种可能的设计中,网络设备向终端设备发送配置信息,该配置信息用于指示基于CBG的传输,该配置信息中包括第一信息,该第一信息用于指示所述TB中包括的CBG的最大个数。
第四方面,本申请实施例提供一种重传数据的方法,该方法可由终端设备执行,也可以由配置于终端设备的部件(例如芯片或者电路)执行,在本申请下文的描述中,将以终端设备执行该方法为例进行说明。
该方法可以包括:终端设备接收来自网络设备的下行控制信息,该下行控制信息用于调度第一上行数据,该第一上行数据包括TB,该TB包括N个CBG,该下行控制信息中包括第二信息和第三信息,该第二信息用于指示所述N个CBG中的M个CBG,所述M个CBG中包括所述N个CBG中的最后一个CBG,该第三信息用于指示重传,所述N和M为正整数,且M小于N;如果在接收所述下行控制信息之前终端设备未根据所述TB对应的信息比特序列生成第二CRC比特序列,则终端设备忽略所述下行控制信息。
在第四方面的一种可能的设计中,如果在接收所述下行控制信息之前终端设备已经根据所述TB对应的信息比特序列生成了第二CRC比特序列,则终端设备根据所述M个CBG对应的信息比特序列和第二CRC比特序列,生成第二上行数据。
在第四方面的一种可能的设计中,终端设备接收来自网络设备的配置信息,该配置信息指示基于CBG的传输,该配置信息中包括第一信息,该第一信息用于指示所述TB中包 括的CBG的最大个数。
第五方面,本申请实施例提供一种通信装置,该装置具有实现上述第一方面或第一方面的任一种可能的设计中终端设备的功能,或具有实现上述第四方面或第四方面的任一种可能的设计中终端设备的功能,该装置可以为终端设备,也可以为终端设备中包括的芯片。
该通信装置也可以具有实现上述第二方面或第二方面的任一种可能的设计中网络设备的功能,或具有实现上述第三方面或第三方面的任一种可能的设计中网络设备的功能,该装置可以为网络设备,也可以为网络设备中包括的芯片。
上述通信装置的功能可以通过硬件实现,也可以通过硬件执行相应的软件实现,所述硬件或软件包括一个或多个与上述功能相对应的模块或单元或手段(means)。
在一种可能的设计中,该装置的结构中包括处理模块和收发模块,其中,处理模块被配置为支持该装置执行上述第一方面或第一方面的任一种设计中终端设备相应的功能,或者执行上述第二方面或第二方面的任一种设计中网络设备相应的功能,或者执行上述第三方面或第三方面的任一种可能的设计中网络设备相应的功能,或者执行上述第四方面或第四方面的任一种可能的设计中终端设备相应的功能。收发模块用于支持该装置与其他通信设备之间的通信,例如该装置为终端设备时,可接收来自网络设备的下行控制信息。该通信装置还可以包括存储模块,存储模块与处理模块耦合,其保存有装置必要的程序指令和数据。作为一种示例,处理模块可以为处理器,通信模块可以为收发器,存储模块可以为存储器,存储器可以和处理器集成在一起,也可以和处理器分离设置。
在另一种可能的设计中,该装置的结构中包括处理器,还可以包括存储器。处理器与存储器耦合,可用于执行存储器中存储的计算机程序指令,以使装置执行上述第一方面或第一方面的任一种可能的设计中的方法,或者执行上述第二方面或第二方面的任一种可能的设计中的方法,或者执行上述第三方面或第三方面的任一种可能的设计中的方法,或者执行上述第四方面或第四方面的任一种可能的设计中的方法。可选地,该装置还包括通信接口,处理器与通信接口耦合。当装置为网络设备或终端设备时,该通信接口可以是收发器或输入/输出接口;当该装置为网络设备中包含的芯片或终端设备中包含的芯片时,该通信接口可以是芯片的输入/输出接口。可选地,收发器可以为收发电路,输入/输出接口可以是输入/输出电路。
第六方面,本申请实施例提供一种芯片系统,包括:处理器,所述处理器与存储器耦合,所述存储器用于存储程序或指令,当所述程序或指令被所述处理器执行时,使得该芯片系统实现上述第一方面或第一方面的任一种可能的设计中的方法,或实现上述第二方面或第二方面的任一种可能的设计中的方法,或实现上述第三方面或第三方面的任一种可能的设计中的方法,或实现上述第四方面或第四方面的任一种可能的设计中的方法。
可选地,该芯片系统还包括接口电路,该接口电路用于交互代码指令至所述处理器。
可选地,该芯片系统中的处理器可以为一个或多个,该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时,该处理器可以是逻辑电路、集成电路等。当通过软件实现时,该处理器可以是一个通用处理器,通过读取存储器中存储的软件代码来实现。
可选地,该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起,也可以和处理器分离设置。示例性的,存储器可以是非瞬时性处理器,例如只读存储器ROM,其可以与处理器集成在同一块芯片上,也可以分别设置在不同的芯片上。
第七方面,本申请实施例提供一种计算机可读存储介质,其上存储有计算机程序或指 令,当该计算机程序或指令被执行时,使得计算机执行上述第一方面或第一方面的任一种可能的设计中的方法,或执行上述第二方面或第二方面的任一种可能的设计中的方法,或执行上述第三方面或第三方面的任一种可能的设计中的方法,或执行上述第四方面或第四方面的任一种可能的设计中的方法。
第八方面,本申请实施例提供一种计算机程序产品,当计算机读取并执行所述计算机程序产品时,使得计算机执行上述第一方面或第一方面的任一种可能的设计中的方法,或执行上述第二方面或第二方面的任一种可能的设计中的方法,或执行上述第三方面或第三方面的任一种可能的设计中的方法,或执行上述第四方面或第四方面的任一种可能的设计中的方法。
第九方面,本申请实施例提供一种通信系统,该通信系统包括网络设备和至少一个终端设备。可选的,该通信系统中还可以包括核心网设备。
附图说明
图1为本申请实施例中URLLC业务数据抢占用于传输eMBB业务数据的时频资源的示意图;
图2为本申请实施例中eMBB业务的上行数据传输被部分取消的示意图;
图3为本申请实施例适用的一种通信系统的网络架构示意图;
图4为本申请实施例提供的一种重传数据的方法的流程示意图;
图5为本申请实施例中终端设备进行上行数据准备的示意图;
图6为本申请实施例提供的另一种重传数据的方法的流程示意图;
图7为本申请实施例提供的一种通信装置的结构示意图;
图8为本申请实施例提供的一种通信装置的另一结构示意图;
图9为本申请实施例提供的另一种通信装置的结构示意图;
图10为本申请实施例提供的另一种通信装置的另一结构示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚,下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例的技术方案可以应用于各种通信系统,例如长期演进(long term evolution,LTE)系统、LTE频分双工(frequency division duplex,FDD)系统、LTE时分双工(time division duplex,TDD)、第五代(5th generation,5G)移动通信系统或新无线(new radio,NR)系统,或者应用于未来的通信系统或其它类似的通信系统等。
请参考图3,为本申请提供的一种通信系统的网络架构示意图。该通信系统中包括核心网设备310、无线接入网设备320和至少一个终端设备(如图3中的终端设备330和终端设备340)。终端设备通过无线方式与无线接入网设备相连,无线接入网设备通过无线或有线方式与核心网设备连接。核心网设备与无线接入网设备可以是独立的不同的物理设备,也可以是将核心网设备的功能与无线接入网设备的逻辑功能集成在同一个物理设备上,还可以是一个物理设备上集成了部分核心网设备的功能和部分的无线接入网设备的功能。终端设备可以是固定位置的,也可以是可移动的。图3只是示意图,该通信系统中还可以包 括其它网络设备,例如还可以包括无线中继设备和无线回传设备,在图3中未画出。本申请实施例对该通信系统中包括的核心网设备、无线接入网设备和终端设备的数量均不作限定。
应理解,本申请实施例中所提及的无线接入网设备在不同的通信系统可对应不同的设备,例如在5G系统中对应5G中的接入网设备,例如gNB或者ng-eNB,在4G系统中对应4G中的接入网设备,例如eNB或者en-gNB。
本申请实施例可以适用于上行信号传输,还可以适用于设备到设备(device to device,D2D)的信号传输。对于上行信号传输,发送设备是终端设备,对应的接收设备是无线接入网设备。对于D2D的信号传输,发送设备是终端设备,对应的接收设备也是终端设备。
无线接入网设备和终端设备之间可以通过授权频谱进行通信,也可以通过非授权频谱进行通信,也可以同时通过授权频谱和非授权频谱进行通信。网络设备和终端设备之间可以通过6千兆赫(gigahertz,GHz)以下的频谱进行通信,也可以通过6GHz以上的频谱进行通信,还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请实施例对网络设备和终端设备之间所使用的频谱资源不做限定。
需要说明的是,本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案,并不构成对于本申请实施例提供的技术方案的限定,本领域普通技术人员可知,随着通信网络架构的演变和新业务场景的出现,本申请实施例提供的技术方案对于类似的技术问题,同样适用。
下面对本申请实施例中的部分用语进行解释说明,以便于本领域技术人员理解。
1)本申请实施例中所涉及的终端设备,是一种具有无线收发功能的设备。终端设备通过无线方式与无线接入网设备相连,从而接入到通信系统中。终端设备也可以称为终端、用户设备(user equipment,UE)、移动台、移动终端等。终端设备可以是手机、平板电脑、带无线收发功能的电脑、虚拟现实终端设备、增强现实终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程手术中的无线终端、智能电网中的无线终端、运输安全中的无线终端、智慧城市中的无线终端、智慧家庭中的无线终端等等。本申请实施例对终端设备所采用的具体技术和具体设备形态不作限定。
作为示例而非限定,终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等,是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称,如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上,或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备,更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能,例如:智能手表或智能眼镜等,以及只专注于某一类应用功能,需要和其它设备如智能手机配合使用,如各类进行体征监测的智能手环、智能头盔、智能首饰等。
终端设备还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载部件、车载芯片或者车载单元,车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请的方法。
2)本申请实施例中所涉及的无线接入网设备,是网络中用于将终端设备接入到无线网络设备的设备。无线接入网设备为无线接入网中的节点,又可以称为基站,还可以称为RAN 节点(或设备),在本申请中,无线接入网设备可以简称为网络设备,如无特殊说明,下文中的网络设备均指无线接入网设备。无线接入网设备可以是基站(base station)、LTE系统或演进的LTE系统(LTE-Advanced,LTE-A)中的演进型基站(evolved NodeB,eNodeB)、5G通信系统中的下一代基站(next generation NodeB,gNB)、发送接收点(transmission reception point,TRP)、基带单元(base band unit,BBU)、WiFi接入点(access point,AP)、未来移动通信系统中的基站或WiFi系统中的接入节点等。无线接入网设备也可以是完成基站部分功能的模块或单元,例如,可以是集中式单元(central unit,CU),或者分布式单元(distributed unit,DU)。本申请实施例对无线接入网设备所采用的具体技术和具体设备形态不作限定。
例如,在一种网络结构中,无线接入网设备可以为CU节点、或DU节点、或为包括CU节点和DU节点的接入网设备。具体的,CU节点用于支持无线资源控制(radio resource control,RRC)、分组数据汇聚协议(packet data convergence protocol,PDCP)、业务数据适配协议(service data adaptation protocol,SDAP)等协议;DU节点用于支持无线链路控制(radio link control,RLC)层协议、媒体接入控制(medium access control,MAC)层协议和物理层协议。
本申请实施例中的无线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、气球和人造卫星上。本申请实施例对网络设备和终端设备的应用场景不作限定。
需要说明的是,本申请实施例中的术语“系统”和“网络”可被互换使用。“多个”是指两个或两个以上,鉴于此,本申请实施例中也可以将“多个”理解为“至少两个”。“至少一个”,可理解为一个或多个,例如理解为一个、两个或更多个。例如,包括至少一个,是指包括一个、两个或更多个,而且不限制包括的是哪几个。例如,包括A、B和C中的至少一个,那么包括的可以是A、B、C,A和B,A和C,B和C,或A和B和C。同理,对于“至少一种”等描述的理解,也是类似的。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,字符“/”,如无特殊说明,一般表示前后关联对象是一种“或”的关系。
除非有相反的说明,本申请实施例提及“第一”、“第二”等序数词用于对多个对象进行区分,不用于限定多个对象的顺序、时序、优先级或者重要程度,并且“第一”、“第二”的描述也并不限定对象一定不同。
本申请实施例中的数据传输可以为基于编码块组(code block group,CBG)的数据传输。举例来说,若eMBB业务的数据传输为基于CBG的传输,一个传输块(transport block,TB)中包括的编码块(code block,CB)可以被分为若干个CBG。如图2所示,当用于传输eMBB业务数据的资源被抢占,eMBB业务数据的上行传输被部分取消时,终端设备只需要重传没有传输成功的那部分CBG即可,即图2中需要重传CBG3和CBG4,无需重传整个TB。
然而,当上行传输被部分取消时,被取消传输的CBG的上行数据准备也会停止。由于TB循环冗余校验(cyclic redundancy check,CRC)比特序列的生成需要用到TB中的所有比特序列,且不是上行数据开始发送前就准备好的,在这种场景下,部分CBG的上 行数据准备停止会导致TB CRC比特序列并没有成功生成。在重传时,由于网络设备仅会调度没有传输成功的部分CBG,终端设备根据调度重传的部分CBG,同样无法成功生成完整的TB CRC比特序列。鉴于此,本申请下面提供一种重传数据的方法,以解决该问题。
请参考图4,为本申请实施例提供的一种重传数据的方法的流程示意图,该方法包括:
步骤S401、网络设备向终端设备发送第一下行控制信息,该第一下行控制信息用于调度第一上行数据的初传,该第一上行数据包括TB,该TB由第一比特序列(b 0,b 1,……b L-1)组成,L为大于1的正整数。
相应的,终端设备可以接收来自网络设备的第一下行控制信息。
本申请实施例中,第一上行数据可以包括一个TB,也可以包括多个TB,本申请实施例中以第一上行数据包括一个TB为例进行描述。
步骤S402、网络设备向终端设备发送第二下行控制信息,该第二下行控制信息用于调度重传所述第一比特序列中的第二比特序列(b r,b r+1,……b L-1),r为正整数。
相应的,终端设备可以接收来自网络设备的第二下行控制信息。
本申请实施例中,在正常情况下,终端设备在接收到第一下行控制信息后,可进行相应的上行数据准备,生成待发送的上行数据。具体的,终端设备可根据组成所述TB的第一比特序列的比特个数和TB CRC比特序列的比特个数,确定需要将所述TB分割成多少个CB,以及每个CB块中包括多少来自第一比特序列的比特。假如需要将所述TB分割成X个CB,如图5所示,终端设备可以将第一比特序列分割成X个部分(part),并将TB CRC比特序列级联在第一比特序列的尾部,即级联在第一比特序列的第X个部分之后。
假设将第一比特序列分割得到的一个部分称为一个CB比特序列。随后,终端设备可以针对每个CB比特序列生成对应的CB CRC比特序列,每个CB CRC比特序列的长度可以相同,然后将生成的CB CRC比特序列级联在对应的CB比特序列之后,构成一个完整的CB。对于最后一个CB比特序列,终端设备可以在该最后一个CB比特序列之后,依次级联TB CRC比特序列以及该最后一个CB比特序列对应的CB CRC比特序列,得到最后一个完整的CB。最后,终端设备可将经上述处理后得到的X个CB级联起来,得到待发送的上行数据。可选的,终端设备在将X个CB级联起来之前,还可以对每个CB进行信道编码,速率匹配(比特交织)等处理,在将X个CB级联起来之后,还可以进行符号映射,然后得到待发送的上行数据,此处不再展开描述。应注意,本申请实施例对终端设备生成TB CRC比特序列的具体时机不作具体限定,只要该TB CRC比特序列在最后一个CB进行信道编码、速率匹配等发送操作前准备好即可。
可选的,如果网络设备配置了基于CBG的传输,终端设备还可以根据配置的最大CBG个数,将所述X个CB划分为N个CBG,每个CBG中可以包括0个或1个或多个CB,N为正整数。在配置了基于CBG的传输的情形下,当所述TB中存在一个或多个CB未传输成功时,终端设备无需重传整个TB,而是可以仅重传未传输成功的那些CB所在的CBG。
需要说明的是,由上述上行数据准备的过程可知,可以根据组成所述TB的第一比特序列,生成X个CB,并可进一步将所述X个CB划分为N个CBG。具体的,每个CB中除了包括来自第一比特序列的CB比特序列之外,还包括CB CRC比特序列。而最后一个CB中除了包括来自第一比特序列的CB比特序列之外,还包括TB CRC比特序列和CB CRC比特序列。特殊的,如果所述TB仅包含一个CB,则只需要生成TB CRC比特序列 并级联第一比特序列之后,就得到了待发送的上行数据。为了描述清楚,在下文的描述中,TB、CB与CBG之间的关系也可以理解为,所述TB包括X个CB,或所述TB包括N个CBG,或所述TB由X个CB组成,或所述TB由N个CBG组成。
具体的,在网络设备向终端设备发送第一下行控制信息之前,网络设备可以向终端设备发送配置信息,该配置信息用于指示基于CBG的传输。该配置信息中还可以包括第一信息,该第一信息指示所述TB中包括的CBG的最大个数T,所述N小于或等于该第一信息中指示的CBG的最大个数T。即,本申请实施例中,网络设备可以通过向终端设备下发上述配置信息,来开启基于CBG的数据传输,并通过包含在上述配置信息中的第一信息来配置每个TB中包括的CBG的最大个数。
但是,在一种场景下,如果网络设备在向终端设备发送了第一下行控制信息之后,又向终端设备发送了第三下行控制信息,该第三下行控制信息指示取消所述TB的部分传输,例如可以是取消所述TB中部分CBG的传输,则上述上行数据准备过程可能会被打断,并可能导致TB CRC比特序列没有成功生成。该第三下行控制信息可以理解为取消指示(cancellation indication,CI),也可以理解为另一个上行传输对应的调度信息,所述另一个上行传输的优先级高于所述TB的传输对应的优先级,所述另一个上行传输可以是上行数据传输也可以是上行控制信息传输,具体不作限定。
鉴于所述TB的传输被部分取消,网络设备可以调度这部分被取消的数据的重传,即如上述步骤S402中所述,网络设备可以向终端设备发送第二下行控制信息,该第二下行控制信息用于调度重传第一比特序列中的第二比特序列。其中,该第二比特序列是指所述TB中被取消传输的那部分CBG对应的比特序列,应注意,所述CBG对应的比特序列具体是指CBG中包括的来自第一比特序列的那些比特,并不包括CB CRC比特序列中的比特或是TB CRC比特序列中的比特,下文不再赘述。进一步的,根据第二比特序列的表示方式(b r,b r+1,……b L-1)可知,被取消传输的部分CBG至少包括所述TB中的最后一个CBG,例如可以包括所述TB中靠后的一个或多个连续的CBG。
或者,在另一种场景下,也有可能终端设备成功生成了上行数据并发送给了网络设备,但是网络设备未接收所述TB中的至少一个CBG,因而导致了网络设备需要执行上述步骤S402,调度重传第一比特序列中的第二比特序列。其中,该第二比特序列是指网络设备为未接收的至少一个CBG对应的比特序列。应注意,此处,所述网络设备“未接收”所述TB中的至少一个CBG可以是指,针对该至少一个CBG中的每个CBG,网络设备未接收到该CBG中包括的一个或多个CB,或者网络设备接收到了该CBG中的全部CB,但是其中存在一个或多个CB发生了译码失败。在这一场景下,上行数据准备过程没有被打断,因此,终端设备成功生成了TB CRC比特序列。进一步的,根据第二比特序列的表示方式(b r,b r+1,……b L-1)可知,网络设备未接收的所述至少一个CBG至少包括所述TB中的最后一个CBG,例如可以包括所述TB中靠后的一个或多个连续的CBG。
可选的,第二下行控制信息中可以包括第二信息,该第二信息用于指示第二比特序列。在一种可能的实施方式中,如果网络设备配置了基于CBG的传输,则该第二信息可用于指示所述TB中的M个CBG,所述M个CBG对应的比特序列即为第二比特序列。M为小于N的正整数,即整个TB共包括N个CBG,该M个CBG是指所述TB中包括的部分CBG,且该M个CBG包括所述N个CBG中的最后一个CBG。可以理解,所述M个CBG是指所述TB中需要重传的那部分CBG,可以是因为之前调度的上行数据传输被部分取消 而导致终端设备没能成功发送的CBG,也可以是因为网络设备的译码失败而导致网络设备没能成功接收的CBG,并不限定。
本申请实施例对第二信息指示M个CBG的方式不作具体限定。在一个示例中,第二信息可以是一个T比特长度的比特图(bitmap),该bitmap中的T个比特分别与该TB中最大可能包括的T个CBG一一对应。当某一个比特置“1”时,可表示本次上行数据传输中需要传输该比特对应的CBG,当该比特置“0”时,可表示本次上行数据传输中不需要传输该比特对应的CBG。
可选的,第二下行控制信息中还可以包括第三信息,该第三信息用于指示重传,即第二下行控制信息调度的上行数据传输为重传。
举例来说,如图2所示,eMBB业务的一个TB包括的若干CB被分成4个CBG,分别为CBG1至CBG4。在该TB的初传时,用于传输CBG3和CBG4的时频资源被URLLC业务的数据传输抢占,从而导致了该TB的初传被部分取消,具体可以是该TB中的CBG3和CBG4的上行传输被取消。在该场景下,网络设备可以调度该TB的重传,并通过第一信息指示需要重传CBG3和CBG4这2个CBG。此时M=2,所述M个CBG为CBG3和CBG4。
应注意,图2仅为一种示例,图2可以应用在任何低优先级业务可被高优先级业务抢占传输资源,并导致低优先级业务的传输部分或全部取消的场景下。抢占可以发生在同一终端设备的不同业务传输之间,也可以发生在进行不同业务传输的不同终端设备之间。对于同一终端设备不同业务传输之间的取消,网络设备会通过优先级指示来指示业务的优先级。对于不同业务传输的不同终端设备之间的抢占,网络设备会下发CI来指示终端设备取消部分或全部传输。
步骤S403、终端设备根据第二比特序列和第一CRC比特序列生成第二上行数据,或者根据第二比特序列和第二CRC比特序列生成第二上行数据。
其中,第一CRC比特序列是根据第二比特序列生成的,具体是指将第二比特序列输入到CRC生成模块而生成的TB CRC比特序列。或者,也可以理解为第一CRC比特序列是根据所述M个CBG对应的比特序列生成的,是指将所述M个CBG对应的比特序列输入到CRC生成模块而生成的TB CRC比特序列,如图5所示,所述M个CBG对应的比特序列是指这M个CBG对应的所有CB中来自TB的所有比特组成的序列。由于所述M个CBG为所述TB中包括的部分CBG,因此,也可以将第一CRC比特序列称为部分(partial)TB CRC比特序列,或者第一CRC比特序列也可以具有其他名称,本申请并不限定。
第二CRC比特序列是根据第一比特序列生成的,具体是指将第一比特序列输入到CRC生成模块而生成的TB CRC比特序列。或者,也可以理解为第二CRC比特序列是根据所述整个TB生成的,是指将所述整个TB对应的比特序列输入到CRC生成模块而生成的TB CRC比特序列。该第二CRC比特序列也可以称为TB CRC比特序列。
具体的,该步骤S403是指终端设备在接收到第二下行控制信息之后进行的上行数据准备过程。在一种可能的实现方式中,由于第二比特序列是第一比特序列中的部分比特序列,则终端设备可以直接根据第二比特序列,生成第一CRC比特序列,然后根据第二比特序列和生成的第一CRC比特序列,生成待发送的第二上行数据。具体过程请参考上文中关于图5的描述,此处不再赘述。
在另一种可能的实现方式中,如果终端设备在接收第二下行控制信息之前,还接收了 来自网络设备的第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则终端设备可以根据第二比特序列和第一CRC比特序列,生成待发送的第二上行数据。应注意,如果终端设备在接收第二下行控制信息之前,还接收了来自网络设备的第三下行控制信息,则可表示终端设备在第一下行控制信息调度的数据传输的上行数据准备过程中,还没有根据第一比特序列生成第二CRC比特序列。
如果终端设备在接收第二下行控制信息之前,没接收到来自网络设备的第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则终端设备可以根据第二比特序列和第二CRC比特序列,生成待发送的第二上行数据。应注意,如果终端设备在接收第二下行控制信息之前,没接收到来自网络设备的第三下行控制信息,则可表示终端设备在第一下行控制信息调度的数据传输的上行数据准备过程中,已经根据第一比特序列生成了第二CRC比特序列。例如,有可能终端设备已进行过第一比特序列的一次完整传输,但是由于网络设备出现了译码失败,而导致所述TB中的部分CBG需要重传。
也就是说,如果终端设备在接收第二下行控制信息之前,还没有根据第一比特序列生成第二CRC比特序列,那么终端设备可以根据第二比特序列生成第一CRC比特序列,然后根据第二比特序列和生成的第一CRC比特序列,生成待发送的第二上行数据。如果终端设备在接收第二下行控制信息之前,已经根据第一比特序列生成了第二CRC比特序列,那么终端设备可以根据第二比特序列和之前生成的第二CRC比特序列,生成待发送的第二上行数据。类似的,终端设备根据第二比特序列,以及第一CRC比特序列或第二CRC比特序列生成第二上行数据的具体过程可参考上文中关于图5的描述,在此不再赘述。
步骤S404、终端设备将第二上行数据发送给网络设备。
相应的,网络设备可以接收终端设备发送的该第二上行数据,并对该第二上行数据进行译码。
本申请实施例中,如果网络设备在发送第二下行控制信息之前,向终端设备发送了第三下行控制信息,通过该第三下行控制信息指示取消第一下行控制信息调度的第一比特序列的部分传输,则网络设备可以确定第二上行数据是根据第二比特序列和第一CRC比特序列生成的。如果网络设备在发送第二下行控制信息之前,没有向终端设备发送第三下行控制信息,指示取消第一比特序列的部分传输,则网络设备可以确定第二上行数据是根据第二比特序列和第二CRC比特序列生成的。
可以理解,如果网络设备通过第一下行控制信息调度的第一比特序列的初传被部分取消了,则终端设备的上行数据准备过程被打断,第二CRC比特序列没有成功生成,网络设备也不会接收到第二CRC比特序列。反之,如果网络设备通过第一下行控制信息调度的第一比特序列的初传没有被部分取消,则终端设备的上行数据准备过程正常进行,终端设备可以根据第一比特序列成功生成第二CRC比特序列,并根据第一比特序列和第二CRC比特序列生成相应的上行数据,并发送给网络设备。在这一情形下,网络设备可以接收到终端设备根据第一比特序列生成的第二CRC比特序列。可以理解的是,这里的网络设备接收到第二CRC比特序列并不代表网络设备可以正确解调译码出该第二CRC比特序列,只表示终端设备将第二CRC比特序列发送给网络设备了。
因此,从另一角度来看,网络设备也可以根据是否接收到终端设备根据第一比特序列生成的第二CRC比特序列,来判断第二上行数据是根据第二比特序列和第一CRC比特序列生成的,还是根据第二比特序列和第二CRC比特序列生成的。
具体的,如果网络设备在发送第二下行控制信息之前,还没有接收到根据第一比特序列生成的第二CRC比特序列,则网络设备可以确定第二上行数据是根据第二比特序列和第一CRC比特序列生成的。反之,如果网络设备在发送第二下行控制信息之前,已接收到根据第一比特序列生成的第二CRC比特序列,则网络设备可以确定第二上行数据是根据第二比特序列和第二CRC比特序列生成的。
需要说明的是,此处,网络设备在发送第二下行控制信息之前接收到根据第一比特序列生成的第二CRC比特序列可表示,网络设备之前调度了所述TB的完整传输,并从终端设备接收了该TB的信号,但是并没有对该TB进行正确的解调译码,例如,可能对该TB中包括的一个或多个CB译码失败。因为如果网络设备对之前从终端设备接收到的TB进行正确的解调译码了,网络设备也就不会再发送第二下行控制信息,为终端设备调度该TB的部分重传了。
在实际传输中,会有CB-CRC虚警的问题,CB-CRC虚警是指某个CB实际解错了,但是CRC校验通过,接收设备会误以为这个CB解对了。如果有了TB-CRC,相当于双重保险,如果所有的CB-CRC都校验正确,但实际有一个或者多个CB-CRC虚警了,也就是说有一个或者多个CB其实没有解对,通过TB CRC就可以知道这个TB并没有真正全部解对,肯定有至少一个CB没有解对了,接收设备可以通知发送设备重新发送该TB。如果没有TB-CRC,那么上述功能就没有了,无法知道CB-CRC的虚警。而另一方面,如果终端设备的初传被部分取消了,而重传只被调度发送部分TB序列,就需要终端处理整个TB序列才能生成传统的TB CRC,但实际又只需要发送部分TB序列,所以这种情况下生成传统TB CRC是增加了终端设备的实现复杂度的。
由此可知,采用本申请提供的技术方案,当网络设备调度一个TB中的部分CBG的重传时,终端设备可以根据需要重传的第二比特序列,以及第一CRC比特序列或第二CRC比特序列,生成待发送的第二上行数据,并发送给网络设备。如此,可以尽可能的获取TB CRC的增益,有效减小CB CRC虚警带来的性能损失,同时又可以降低终端设备实现的复杂度。例如,针对一个TB,在该TB的初传被部分取消的场景下,通过上述技术方案,可以使得终端设备成功实现部分CBG的重传,并且终端设备可以仅根据需要重传的部分CBG做上行数据准备,无需根据整个TB做上行数据准备,从而降低了终端实现的复杂度。
请参考图6,为本申请提供的另一种重传数据的方法的示意图,该方法包括:
步骤S601、网络设备生成下行控制信息,该下行控制信息用于调度第一上行数据,该第一上行数据包括TB,该TB包括N个CBG,该下行控制信息中包括第二信息和第三信息,第二信息用于指示所述N个CBG中的M个CBG,所述M个CBG中包括所述N个CBG中的最后一个CBG,第三信息用于指示重传,N和M均为正整数。
本申请实施例中,第一上行数据可以包括一个TB,也可以包括多个TB,本申请实施例中以第一上行数据包括一个TB为例进行描述。
针对第一上行数据中的所述TB,根据该下行控制信息中第三信息的指示可知,该下行控制信息调度的该次上行数据传输是该TB的一次重传,该下行控制信息中的第二信息用于指示在该TB中需要重传的M个CBG。
其中,如果网络设备在发送所述下行控制信息之前未接收所述N个CBG中的至少一个CBG,则M等于N。反之,如果网络设备在发送所述下行控制信息之前接收了所述N 个CBG,但是所述N个CBG中存在至少一个CBG未被成功译码,则M小于或等于N。
也就是说,本申请实施例中,对网络设备调度重传的操作进行了约束。针对一个TB,如果网络设备在本次调度该TB的重传之前,没有成功调度过整个TB的传输,即在发送所述下行控制信息之前网络设备未接收所述TB包括的N个CBG中的至少一个CBG,则本次调度不允许仅调度该TB中部分CBG的重传,而是需要调度整个TB的重传。因为如果网络设备在本次调度该TB的重传之前,没有成功调度过整个TB的传输,则表示终端设备在本次调度的该TB的重传之前还没有根据该TB对应的信息比特序列,生成TB CRC比特序列,例如可能初传时调度的整个TB的传输被部分或全部取消,导致上行数据准备过程中止,终端设备没有成功生成TB CRC比特序列。在该情形下,如果在本次调度的重传中网络设备仅调度该TB中部分CBG的重传,则终端设备在本次调度的重传中同样无法根据调度的部分CBG中的比特序列,生成TB CRC比特序列,这会影响终端设备的上行数据的生成,导致终端设备无法获取TB CRC增益。
如果网络设备在本次调度该TB的重传之前,调度过整个TB的传输,而且调度的该次整个TB的传输没有被部分或完全取消,但是由于译码错误失败或是其它原因,网络设备对接收的该TB中包括的N个CBG中的至少一个CBG没有成功译码并因此导致需要进行重传,即网络设备在发送所述下行控制信息之前接收了所述N个CBG,但是所述N个CBG中的至少一个CBG未被成功译码,则网络设备本次可以调度该TB中部分CBG的重传,也可以调度整个TB的重传,并不限定。在该情形下,如果网络设备之前成功调度过整个TB的传输,则终端设备在之前调度的整个TB的传输中已根据该TB对应的信息比特序列生成了TB CRC比特序列。那么无论网络设备本次调度是仅调度该TB中部分CBG的重传,还是调度整个TB的重传,终端设备都可以根据之前生成的TB CRC比特序列生成第二上行数据,进而获取TB-CRC增益。
步骤S602、网络设备向终端设备发送下行控制信息。
相应的,终端设备可以接收来自网络设备的该下行控制信息。
如前所述,所述下行控制信息中包括第二信息,该第二信息用于指示本次调度的数据传输中需要重传的M个CBG。由于所述TB共包括N个CBG,因此,如果M等于N,则表示所述下行控制信息调度了整个TB的重传,或者说所述下行控制信息调度了所述TB中包括的全部CBG的重传。在该情形下,终端设备接收到下行控制信息后,按照正常流程进行数据准备即可。具体的,终端设备可根据所述TB对应的信息比特序列,生成第二CRC比特序列,然后根据所述TB对应的比特序列和生成的第二CRC比特序列,生成第二上行数据,并发送给网络设备。
如果M小于N,则表示所述下行控制信息调度了所述TB中的部分CBG的重传。在该情形下,终端设备接收到该下行控制信息后,可以对网络设备调度该次重传的合理性进行相应检测,具体请参见下文中关于步骤S603的描述。应注意,步骤S603中的描述仅限于M小于N,第一信息指示调度TB中部分CBG重传的情形。
步骤S603、如果在接收下行控制信息之前终端设备未根据所述TB对应的信息比特序列生成第二CRC比特序列,则终端设备忽略该下行控制信息。
其中,终端设备忽略下行控制信息也可以为,终端设备丢弃该下行控制信息。这表示终端设备在根据所述TB对应的信息比特序列,生成第二CRC比特序列之前,不期望接收到这样的下行控制信息,即不期望接收到用于调度所述TB中部分CBG重传的下行控制信 息。或者也可以理解为,终端设备不期望网络设备在成功调度整个TB的传输前,调度所述TB中部分CBG的重传。
可选的,在该情形下,终端设备还可以向网络设备上报调度错误指示。
如果终端设备在接收下行控制信息之前终端设备已根据所述TB对应的信息比特序列,生成了第二CRC比特序列,则终端设备可以根据本次调度的所述M个CBG对应的信息比特序列和之前已生成的第二CRC比特序列,生成第二上行数据,并发送给网络设备。例如,在接收下行控制信息之前网络设备成功调度了整个TB的传输,在该次整个TB的传输中,终端设备在进行数据准备时已根据所述TB对应的信息比特序列生成了第二CRC比特序列。但是由于网络设备对该TB中的至少一个CBG译码错误,网络设备需要调度该TB中发生译码错误的部分CBG的重传,因此,在该次重传的过程中,终端设备可以仅根据需要重传的M个CBG对应的信息比特序列,以及之前在传输整个TB的过程中生成的第二CRC比特序列进行上行数据准备,生成第二上行数据。
可选的,在网络设备向终端设备发送下行控制信息之前,网络设备还可以向终端设备发送配置信息。该配置信息用于指示基于CBG的传输。该配置信息中还可以包括第一信息,该第一信息指示所述TB中包括的CBG的最大个数。即,本申请实施例中,可以通过向终端设备下发上述配置信息,来开启基于CBG的数据传输,并通过包含在上述配置信息中的第一信息来配置每个TB中包括的CBG的个数。进而,终端设备接收到来自网络设备的配置信息后,可以根据第一信息指示的所述TB中包括的CBG的最大个数,将所述TB中包括的若干个CB分为所述N个CBG。可以理解,所述N值小于或等于第一信息中指示的CBG的最大个数。
由此可知,采用本申请提供的技术方案,通过对网络设备的调度重传的操作做出限制,要求网络设备在调度部分CBG的重传之前,应调度过至少一次完整的TB的传输,如此,可使终端设备能够基于之前在进行完整的TB的传输的过程中生成的第二CRC比特序列实现本次调度的部分CBG的重传,并有效减小对终端设备处理策略的改变。
本申请实施例还提供一种通信装置,请参考图7,为本申请实施例提供的一种通信装置的结构示意图,该通信装置700包括:收发模块710和处理模块720。该通信装置可用于实现上述任一方法实施例中涉及终端设备的功能。例如,该通信装置可以是终端设备,例如手持终端设备或车载终端设备;该通信装置还可以是终端设备中包括的芯片或者电路,或者包括终端设备的装置,如各种类型的车辆等。
示例性的,当该通信装置执行图4中所示的方法实施例中对应终端设备的操作或者步骤时,收发模块710用于,接收来自网络设备的第一下行控制信息,该第一下行控制信息用于调度第一上行数据的初传,该第一上行数据包括TB,该TB由第一比特序列(b 0,b 1,……b L-1)组成。收发模块710还用于,接收来自网络设备的第二下行控制信息,该第二下行控制信息用于调度重传第一比特序列中的第二比特序列(b r,b r+1,……b L-1),r为正整数。处理模块720用于,根据第二比特序列和第一CRC比特序列生成第二上行数据,或者根据第二比特序列和第二CRC比特序列生成第二上行数据,其中,第一CRC比特序列是根据第二比特序列生成的,第二CRC比特序列是根据第一比特序列生成的。收发模块710还用于,将所述第二上行数据发送给网络设备。
在一种可能的设计中,处理模块720具体用于,如果在接收第二下行控制信息之前, 收发模块710还接收了来自网络设备的第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则根据第二比特序列和第一CRC比特序列生成所述第二上行数据。
在一种可能的设计中,处理模块720具体用于,如果在接收第二下行控制信息之前,还没有根据第一比特序列生成第二CRC比特序列,终端设备根据第二比特序列和第一CRC比特序列生成第二上行数据。
在一种可能的设计中,处理模块720具体用于,如果在接收第二下行控制信息之前,收发模块710没接收到来自网络设备的第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则根据第二比特序列和第二CRC比特序列生成第二上行数据。
在一种可能的设计中,处理模块720具体用于,如果在接收第二下行控制信息之前,已经根据第一比特序列生成了第二CRC比特序列,则根据第二比特序列和第二CRC比特序列生成第二上行数据。
在一种可能的设计中,收发模块710还用于,接收来自网络设备的配置信息,该配置信息指示基于CBG的传输,该配置信息中还包括第一信息,该第一信息指示所述TB中包括的CBG的最大个数。
当该通信装置执行图6中所示的方法实施例中对应终端设备的操作或者步骤时,收发模块710用于,接收来自网络设备的下行控制信息,该下行控制信息用于调度第一上行数据,该第一上行数据包括TB,该TB包括N个CBG,该下行控制信息中包括第二信息和第三信息,该第二信息用于指示所述N个CBG中的M个CBG,所述M个CBG中包括所述N个CBG中的最后一个CBG,所述第三信息用于指示重传,所述N和M为正整数,且M小于N;处理模块720用于,如果在收发模块710接收所述下行控制信息之前终端设备未根据所述TB对应的信息比特序列生成第二CRC比特序列,则忽略所述下行控制信息。
在一种可能的设计中,处理模块720还用于,如果在接收所述下行控制信息之前终端设备已经根据所述TB对应的信息比特序列生成了第二CRC比特序列,则终端设备根据所述M个CBG对应的信息比特序列和第二CRC比特序列,生成第二上行数据。
在一种可能的设计中,收发模块710还用于,接收来自网络设备的配置信息,该配置信息指示基于CBG的传输,该配置信息中包括第一信息,该第一信息用于指示所述TB中包括的CBG的最大个数。
该通信装置中涉及的处理模块720可以由至少一个处理器或处理器相关电路组件实现,收发模块710可以由至少一个收发器或收发器相关电路组件或通信接口实现。该通信装置中的各个模块的操作和/或功能分别为了实现图4、图5或图6中所示方法的相应流程,为了简洁,在此不再赘述。可选的,该通信装置中还可以包括存储模块,该存储模块可以用于存储数据和/或指令,收发模块710和/或处理模块720可以读取存取模块中的数据和/或指令,从而使得通信装置实现相应的方法。该存储模块例如可以通过至少一个存储器实现。
上述存储模块、处理模块和收发模块可以分离存在,也可以全部或者部分模块集成,例如存储模块和处理模块集成,或者处理模块和收发模块集成等。
请参考图8,为本申请实施例中提供的一种通信装置的另一结构示意图。该通信装置具体可为一种终端设备,该通信装置可用于实现上述任一方法实施例中涉及终端设备的功能。便于理解和图示方便,在图8中,终端设备以手机作为例子。如图8所示,终端设备包括处理器,还可以包括存储器,当然,也还可以包括射频电路、天线以及输入输出装置 等。处理器主要用于对通信协议以及通信数据进行处理,以及对终端设备进行控制,执行软件程序,处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置,例如触摸屏、显示屏,键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是,有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时,处理器对待发送的数据进行基带处理后,输出基带信号至射频电路,射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时,射频电路通过天线接收到射频信号,将射频信号转换为基带信号,并将基带信号输出至处理器,处理器将基带信号转换为数据并对该数据进行处理。为便于说明,图8中仅示出了一个存储器和处理器。在实际的终端设备产品中,可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置,也可以是与处理器集成在一起,本申请实施例对此不做限制。
在本申请实施例中,可以将具有收发功能的天线和射频电路视为终端设备的收发单元,将具有处理功能的处理器视为终端设备的处理单元。如图8所示,终端设备包括收发单元810和处理单元820。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器,处理单板,处理模块、处理装置等。可选的,可以将收发单元810中用于实现接收功能的器件视为接收单元,将收发单元810中用于实现发送功能的器件视为发送单元,即收发单元810包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。应理解,收发单元810用于执行上述方法实施例中终端设备侧的发送操作和接收操作,处理单元820用于执行上述方法实施例中终端设备上除了收发操作之外的其他操作。
本申请实施例还提供另一种通信装置,请参考图9,为本申请实施例提供的另一种通信装置的结构示意图,该通信装置900包括:收发模块910和处理模块920。该通信装置可用于实现上述任一方法实施例中涉及网络设备的功能。例如,该通信装置可以是网络设备或网络设备中包括的芯片或电路。
示例性的,当该通信装置执行图4中所示的方法实施例中对应网络设备的操作或者步骤时,收发模块910用于,向终端设备发送第一下行控制信息,该第一下行控制信息用于调度第一上行数据的初传,该第一上行数据包括TB,该TB由第一比特序列(b 0,b 1,……b L-1)组成。收发模块910还用于,向终端设备发送第二下行控制信息,该第二下行控制信息用于调度重传第一比特序列中的第二比特序列,(b r,b r+1,……b L-1),r为正整数。处理模块920用于,通过收发模块910接收来自终端设备的第二上行数据,该第二上行数据是根据第二比特序列和第一CRC比特序列生成的,或者该第二上行数据是根据第二比特序列和第二CRC比特序列生成的,其中,第一CRC比特序列是根据第二比特序列生成的,第二CRC比特序列是根据第一比特序列生成的。
在一种可能的设计中,如果在发送第二下行控制信息之前,收发模块910向终端设备发送了第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则处理模块920可以确定第二上行数据是根据第二比特序列和第一CRC比特序列生成的。
在一种可能的设计中,如果在发送第二下行控制信息之前,收发模块910还没有接收 到根据第一比特序列生成的第二CRC比特序列,则处理模块920可以确定第二上行数据是根据第二比特序列和第一CRC比特序列生成的。
在一种可能的设计中,如果在发送第二下行控制信息之前,收发模块910没有向终端设备发送第三下行控制信息,该第三下行控制信息指示取消第一比特序列的部分传输,则处理模块920可以确定第二上行数据是根据第二比特序列和第二CRC比特序列生成的。
在一种可能的设计中,如果在发送第二下行控制信息之前,收发模块910已接收到根据第一比特序列生成的第二CRC比特序列,则处理模块920可以确定第二上行数据是根据第一比特序列和第二CRC比特序列生成的。
在一种可能的设计中,收发模块910还用于,向终端设备发送配置信息,该配置信息指示基于CBG的传输,该配置信息中包括第一信息,该第一信息指示所述TB中包括的CBG的最大个数。
当该通信装置执行图6中所示的方法实施例中对应网络设备的操作或步骤时,处理模块920用于,生成下行控制信息,该下行控制信息用于调度第一上行数据,该第一上行数据包括TB,该TB包括N个CBG,该下行控制信息中包括第二信息和第三信息,该第二信息用于指示所述N个CBG中的M个CBG,所述M个CBG中包括所述N个CBG中的最后一个CBG,该第三信息用于指示重传,N和M均为正整数;其中,如果在发送所述下行控制信息之前收发模块910未接收所述N个CBG中的至少一个CBG,则所述M等于N;收发模块910用于,向终端设备发送所述下行控制信息。
在一种可能的设计中,如果在收发模块910发送所述下行控制信息之前网络设备接收了所述N个CBG,但是所述N个CBG中的至少一个CBG未被成功译码,则M小于或等于N。
在一种可能的设计中,收发模块910还用于,向终端设备发送配置信息,该配置信息用于指示基于CBG的传输,该配置信息中包括第一信息,该第一信息用于指示所述TB中包括的CBG的最大个数。
应理解,该通信装置中涉及的处理模块920可以由至少一个处理器或处理器相关电路组件实现,收发模块910可以由至少一个收发器或收发器相关电路组件或通信接口实现。该通信装置中的各个模块的操作和/或功能分别为了实现图4、图5或图6中所示方法的相应流程,为了简洁,在此不再赘述。可选的,该通信装置中还可以包括存储模块,该存储模块可以用于存储数据和/或指令,收发模块910和/或处理模块920可以读取存取模块中的数据和/或指令,从而使得通信装置实现相应的方法。该存储模块例如可以通过至少一个存储器实现。
上述存储模块、处理模块和收发模块可以分离存在,也可以全部或者部分模块集成,例如存储模块和处理模块集成,或者处理模块和收发模块集成等。
请参考图10,为本申请实施例中提供的一种通信装置的另一结构示意图。该通信装置可具体为一种网络设备,例如基站,用于实现上述任一方法实施例中涉及网络设备(如第一网络设备或者目标网络设备)的功能。
该网络设备1000包括:一个或多个射频单元,如远端射频单元(remote radio unit,RRU)1001和一个或多个基带单元(baseband unit,BBU)1002。所述RRU 1001可以称为收发单元、收发机、收发电路、或者收发器等等,其可以包括至少一个天线10011和射频单元10012。所述RRU 1001部分主要用于射频信号的收发以及射频信号与基带信号的 转换。所述BBU 1002部分主要用于进行基带处理,对基站进行控制等。所述RRU 1001与BBU 1002可以是物理上设置在一起,也可以物理上分离设置的,即分布式基站。
所述BBU 1002为基站的控制中心,也可以称为处理单元,主要用于完成基带处理功能,如信道编码,复用,调制,扩频等等。例如所述BBU(处理单元)1002可以用于控制基站执行上述方法实施例中关于网络设备的操作流程。
在一个示例中,所述BBU 1002可以由一个或多个单板构成,多个单板可以共同支持单一接入指示的无线接入网(如LTE网),也可以分别支持不同接入制式的无线接入网(如LTE网,5G网或其他网)。所述BBU 1002还可以包括存储器10021和处理器10022,所述存储器10021用于存储必要的指令和数据。所述处理器10022用于控制基站进行必要的动作,例如用于控制基站执行上述方法实施例中发送操作。所述存储器10021和处理器10022可以服务于一个或多个单板。也就是说,可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
本申请实施例还提供一种芯片系统,包括:处理器,所述处理器与存储器耦合,所述存储器用于存储程序或指令,当所述程序或指令被所述处理器执行时,使得该芯片系统实现上述任一方法实施例中的对应终端设备的方法或者对应网络设备的方法。
可选地,该芯片系统中的处理器可以为一个或多个。该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时,该处理器可以是逻辑电路、集成电路等。当通过软件实现时,该处理器可以是一个通用处理器,通过读取存储器中存储的软件代码来实现。
可选地,该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起,也可以和处理器分离设置,本申请并不限定。示例性的,存储器可以是非瞬时性处理器,例如只读存储器ROM,其可以与处理器集成在同一块芯片上,也可以分别设置在不同的芯片上,本申请对存储器的类型,以及存储器与处理器的设置方式不作具体限定。
示例性的,该芯片系统可以是现场可编程门阵列(field programmable gate array,FPGA),可以是专用集成芯片(application specific integrated circuit,ASIC),还可以是系统芯片(system on chip,SoC),还可以是中央处理器(central processor unit,CPU),还可以是网络处理器(network processor,NP),还可以是数字信号处理电路(digital signal processor,DSP),还可以是微控制器(micro controller unit,MCU),还可以是可编程控制器(programmable logic device,PLD)或其他集成芯片。
应理解,上述方法实施例中的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。
本申请实施例还提供一种计算机可读存储介质,所述计算机存储介质中存储有计算机可读指令,当计算机读取并执行所述计算机可读指令时,使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种计算机程序产品,当计算机读取并执行所述计算机程序产品时,使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种通信系统,该通信系统包括网络设备和至少一个终端设备,可选的,该通信系统中还可包括核心网设备。
应理解,本申请实施例中提及的处理器可以是CPU,还可以是其他通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。 通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解,本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(read-only memory,ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM,DR RAM)。
需要说明的是,当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时,存储器(存储模块)集成在处理器中。
应注意,本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解,在本申请的各种实施例中涉及的各种数字编号仅为描述方便进行的区分,上述各过程或步骤的序号的大小并不意味着执行顺序的先后,各过程或步骤的执行顺序应以其功能和内在逻辑确定,而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计 算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的各个实施例中,如果没有特殊说明以及逻辑冲突,不同的实施例之间的术语和/或描述具有一致性、且可以相互引用,不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。

Claims (27)

  1. 一种重传数据的方法,其特征在于,所述方法包括:
    接收来自网络设备的第一下行控制信息,所述第一下行控制信息用于调度第一上行数据的初传,所述第一上行数据包括传输块TB,所述TB由第一比特序列(b 0,b 1,……b L-1)组成;
    接收来自所述网络设备的第二下行控制信息,所述第二下行控制信息用于调度重传所述第一比特序列中的第二比特序列(b r,b r+1,……b L-1),r为正整数;
    根据所述第二比特序列和第一循环冗余校验CRC比特序列生成第二上行数据,或者,根据所述第二比特序列和第二CRC比特序列生成第二上行数据,其中,所述第一CRC比特序列是根据所述第二比特序列生成的,所述第二CRC比特序列是根据所述第一比特序列生成的;
    将所述第二上行数据发送给所述网络设备。
  2. 根据权利要求1所述的方法,其特征在于,所述方法包括:
    如果在接收所述第二下行控制信息之前,还接收了来自所述网络设备的第三下行控制信息,所述第三下行控制信息指示取消所述第一比特序列的部分传输,则根据所述第二比特序列和所述第一CRC比特序列生成所述第二上行数据。
  3. 根据权利要求1所述的方法,其特征在于,所述方法包括:
    如果在接收所述第二下行控制信息之前,还没有根据所述第一比特序列生成所述第二CRC比特序列,则根据所述第二比特序列和所述第一CRC比特序列生成第二上行数据。
  4. 根据权利要求1至3中任一项所述的方法,其特征在于,所述方法包括:
    如果在接收所述第二下行控制信息之前,没接收到来自所述网络设备的第三下行控制信息,所述第三下行控制信息指示取消所述第一比特序列的部分传输,则根据所述第二比特序列和所述第二CRC比特序列生成所述第二上行数据。
  5. 根据权利要求1至3中任一项所述的方法,其特征在于,所述方法包括:
    如果在接收所述第二下行控制信息之前,已经根据所述第一比特序列生成了所述第二CRC比特序列,则根据所述第二比特序列和所述第二CRC比特序列生成第二上行数据。
  6. 根据权利要求1至5中任一项所述的方法,其特征在于,所述方法还包括:
    接收来自所述网络设备的配置信息,所述配置信息指示基于编码块组CBG的传输,所述配置信息中包括第一信息,所述第一信息指示所述TB中包括的CBG的最大个数。
  7. 一种重传数据的方法,其特征在于,所述方法包括:
    向终端设备发送第一下行控制信息,所述第一下行控制信息用于调度第一上行数据的初传,所述第一上行数据包括传输块TB,所述TB由第一比特序列(b 0,b 1,……b L-1)组成;
    向所述终端设备发送第二下行控制信息,所述第二下行控制信息用于调度重传所述第一比特序列中的第二比特序列(b r,b r+1,……b L-1),r为正整数;
    接收来自所述终端设备的第二上行数据,所述第二上行数据是根据所述第二比特序列和第一循环冗余校验CRC比特序列生成的,或者,所述第二上行数据是根据所述第二比特序列和第二CRC比特序列生成的,其中,所述第一CRC比特序列是根据所述第二比特序列生成的,所述第二CRC比特序列是根据所述第一比特序列生成的。
  8. 根据权利要求7所述的方法,其特征在于,如果在发送所述第二下行控制信息之前, 向所述终端设备发送了第三下行控制信息,所述第三下行控制信息指示取消所述第一比特序列的部分传输,则所述第二上行数据是根据所述第二比特序列和所述第一CRC比特序列生成的。
  9. 根据权利要求7所述的方法,其特征在于,如果在发送所述第二下行控制信息之前,还没有接收到根据所述第一比特序列生成的所述第二CRC比特序列,则所述第二上行数据是根据所述第二比特序列和所述第一CRC比特序列生成的。
  10. 根据权利要求7至9中任一项所述的方法,其特征在于,如果在发送所述第二下行控制信息之前,没有向所述终端设备发送第三下行控制信息,所述第三下行控制信息指示取消所述第一比特序列的部分传输,则所述第二上行数据是根据所述第二比特序列和所述第二CRC比特序列生成的。
  11. 根据权利要求7至9中任一项所述的方法,其特征在于,如果在发送所述第二下行控制信息之前,已接收到根据所述第一比特序列生成的所述第二CRC比特序列,则所述第二上行数据是根据所述第一比特序列和所述第二CRC比特序列生成的。
  12. 根据权利要求7至11中任一项所述的方法,其特征在于,所述方法还包括:
    向所述终端设备发送配置信息,所述配置信息指示基于编码块组CBG的传输,所述配置信息中包括第一信息,所述第一信息指示所述TB中包括的CBG的最大个数。
  13. 一种通信装置,其特征在于,所述装置包括:
    收发模块,用于接收来自网络设备的第一下行控制信息,所述第一下行控制信息用于调度第一上行数据的初传,所述第一上行数据包括传输块TB,所述TB由第一比特序列(b 0,b 1,……b L-1)组成;
    所述收发模块还用于,接收来自所述网络设备的第二下行控制信息,所述第二下行控制信息用于调度重传所述第一比特序列中的第二比特序列(b r,b r+1,……b L-1),r为正整数;
    处理模块,用于根据所述第二比特序列和第一循环冗余校验CRC比特序列生成第二上行数据,或者,根据所述第二比特序列和第二CRC比特序列生成第二上行数据,其中,所述第一CRC比特序列是根据所述第二比特序列生成的,所述第二CRC比特序列是根据所述第一比特序列生成的;
    所述收发模块还用于,将所述第二上行数据发送给所述网络设备。
  14. 根据权利要求13所述的装置,其特征在于,所述处理模块具体用于:
    如果在接收所述第二下行控制信息之前,还接收了来自所述网络设备的第三下行控制信息,所述第三下行控制信息指示取消所述第一比特序列的部分传输,则根据所述第二比特序列和所述第一CRC比特序列生成所述第二上行数据。
  15. 根据权利要求13所述的装置,其特征在于,所述处理模块具体用于:
    如果在接收所述第二下行控制信息之前,还没有根据所述第一比特序列生成所述第二CRC比特序列,则根据所述第二比特序列和所述第一CRC比特序列生成第二上行数据。
  16. 根据权利要求13至15中任一项所述的装置,其特征在于,所述处理模块具体用于:
    如果在接收所述第二下行控制信息之前,没接收到来自所述网络设备的第三下行控制信息,所述第三下行控制信息指示取消所述第一比特序列的部分传输,则根据所述第二比特序列和所述第二CRC比特序列生成所述第二上行数据。
  17. 根据权利要求13至15中任一项所述的装置,其特征在于,所述处理模块具体用于:
    如果在接收所述第二下行控制信息之前,已经根据所述第一比特序列生成了所述第二 CRC比特序列,则根据所述第二比特序列和所述第二CRC比特序列生成第二上行数据。
  18. 根据权利要求13至17中任一项所述的装置,其特征在于,所述收发模块还用于:
    接收来自所述网络设备的配置信息,所述配置信息指示基于编码块组CBG的传输,所述配置信息中包括第一信息,所述第一信息指示所述TB中包括的CBG的最大个数。
  19. 一种通信装置,其特征在于,所述装置包括:
    收发模块,用于向终端设备发送第一下行控制信息,所述第一下行控制信息用于调度第一上行数据的初传,所述第一上行数据包括传输块TB,所述TB由第一比特序列(b 0,b 1,……b L-1)组成;
    所述收发模块还用于,向所述终端设备发送第二下行控制信息,所述第二下行控制信息用于调度重传所述第一比特序列中的第二比特序列(b r,b r+1,……b L-1),r为正整数;
    处理模块,用于通过所述收发模块来自所述终端设备的第二上行数据,所述第二上行数据是根据所述第二比特序列和第一循环冗余校验CRC比特序列生成的,或者,所述第二上行数据是根据所述第二比特序列和第二CRC比特序列生成的,其中,所述第一CRC比特序列是根据所述第二比特序列生成的,所述第二CRC比特序列是根据所述第一比特序列生成的。
  20. 根据权利要求19所述的装置,其特征在于,如果在发送所述第二下行控制信息之前,向所述终端设备发送了第三下行控制信息,所述第三下行控制信息指示取消所述第一比特序列的部分传输,则所述第二上行数据是根据所述第二比特序列和所述第一CRC比特序列生成的。
  21. 根据权利要求19所述的装置,其特征在于,如果在发送所述第二下行控制信息之前,还没有接收到根据所述第一比特序列生成的所述第二CRC比特序列,则所述第二上行数据是根据所述第二比特序列和所述第一CRC比特序列生成的。
  22. 根据权利要求19至21中任一项所述的装置,其特征在于,如果在发送所述第二下行控制信息之前,没有向所述终端设备发送第三下行控制信息,所述第三下行控制信息指示取消所述第一比特序列的部分传输,则所述第二上行数据是根据所述第二比特序列和所述第二CRC比特序列生成的。
  23. 根据权利要求19至21中任一项所述的装置,其特征在于,如果在发送所述第二下行控制信息之前,已接收到根据所述第一比特序列生成的所述第二CRC比特序列,则所述第二上行数据是根据所述第一比特序列和所述第二CRC比特序列生成的。
  24. 根据权利要求19至23中任一项所述的装置,其特征在于,所述收发模块还用于:
    向所述终端设备发送配置信息,所述配置信息指示基于编码块组CBG的传输,所述配置信息中包括第一信息,所述第一信息指示所述TB中包括的CBG的最大个数。
  25. 一种通信装置,其特征在于,所述装置包括至少一个处理器,所述至少一个处理器与至少一个存储器耦合:
    所述至少一个处理器,用于执行所述至少一个存储器中存储的计算机程序或指令,以使得所述装置执行如权利要求1至6中任一项所述的方法,或者使得所述装置执行如权利要求7至12中任一项所述的方法。
  26. 一种计算机可读存储介质,其特征在于,用于存储指令,当所述指令被执行时,使如权利要求1至6中任一项所述的方法被实现,或者使如权利要求7至12中任一项所述的方法被实现。
  27. 一种通信装置,其特征在于,包括处理器和接口电路;
    所述接口电路,用于与所述处理器交互代码指令或数据;
    所述处理器用于执行如权利要求1至6中任一项所述的方法,或者所述处理器用于执行如权利要求7至12中任一项所述的方法。
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