WO2021142652A1 - Procédé et appareil de transmission de données de liaison montante - Google Patents

Procédé et appareil de transmission de données de liaison montante Download PDF

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Publication number
WO2021142652A1
WO2021142652A1 PCT/CN2020/072208 CN2020072208W WO2021142652A1 WO 2021142652 A1 WO2021142652 A1 WO 2021142652A1 CN 2020072208 W CN2020072208 W CN 2020072208W WO 2021142652 A1 WO2021142652 A1 WO 2021142652A1
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WIPO (PCT)
Prior art keywords
uplink data
terminal device
indication information
network device
random access
Prior art date
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PCT/CN2020/072208
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English (en)
Chinese (zh)
Inventor
骆喆
张云昊
陈雁
徐修强
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/072208 priority Critical patent/WO2021142652A1/fr
Priority to CN202080089210.6A priority patent/CN114846898A/zh
Publication of WO2021142652A1 publication Critical patent/WO2021142652A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the embodiments of the present application relate to the field of wireless communication, and in particular, to a method and device for uplink data transmission.
  • terminal devices in communication scenarios gradually show characteristics such as large numbers and multiple forms.
  • the industrial automation scenario there are a large number of monitoring equipment, machines, or sensors in the factory building; in the home and life scenarios, there are a large number of mobile phones, tablets, wearable devices, smart home appliances, or vehicle-mounted terminal devices, etc.
  • the embodiments of the present application provide a method for uplink data transmission, which is used to improve the reliability and spectrum efficiency of data transmission.
  • a method for uplink data transmission is provided, and the execution subject of the method is a terminal device or a module in the terminal device.
  • the terminal device is taken as the execution subject as an example for description.
  • the terminal device sends the first uplink data to the network device; the terminal device receives the first indication information from the network device, the first indication information indicates the feedback information of the first uplink data; when the first indication information satisfies the first condition, the terminal device Sending a random access preamble sequence and second uplink data to the network device, where the second uplink data is retransmission data of the first uplink data.
  • the terminal device uses the first indication information to determine whether the terminal device needs to retransmit and how to retransmit.
  • the terminal device performs retransmission by sending a random access preamble sequence and second uplink data to the network device.
  • the network equipment can not only obtain the retransmission combined gain through the second uplink data sent by the terminal equipment, but also update the timing advance TA through the random access preamble sequence sent by the terminal equipment, and use the new TA to compare the first
  • the uplink data and the second uplink data are decoded, thereby increasing the decoding success rate of the first uplink data and the second uplink data, thereby improving the transmission reliability of the first uplink data.
  • the terminal device sends the first uplink data to the network device through the first uplink data channel, where the time-frequency resource of the first uplink data channel is controlled by the first radio resource RRC The message indicates.
  • the time-frequency resource of the first uplink data channel is an unlicensed resource configured by the network device for the terminal device through the first RRC message.
  • the terminal device sends the first uplink data channel to the network device on the unlicensed resource.
  • the terminal device can directly use the unlicensed resource pre-configured by the network device to send the first uplink data channel to the network device without waiting for the dynamic authorization of the network device, thereby saving signaling overhead and reducing transmission delay.
  • the terminal device determines the second uplink data channel based on the foregoing random access preamble sequence and the mapping relationship between the random access preamble sequence and the time-frequency resource of the uplink data channel.
  • Time-frequency resources, where the second uplink data channel carries the above-mentioned second uplink data.
  • the mapping relationship between the random access preamble sequence and the time-frequency resources of the uplink data channel includes: the physical random access channel opportunity RO where the random access preamble sequence is located, and the random access preamble sequence The root sequence number and the cyclic shift value of the random access preamble sequence, one or more of these three parameters, and the mapping relationship between the time-frequency resources of the uplink data channel.
  • the terminal equipment can determine the time-frequency resource of the second uplink data channel according to the random access preamble sequence and the above-mentioned mapping relationship, without the need for the network equipment to indicate the above-mentioned time-frequency resource to the terminal equipment through indication information, saving signaling Overhead.
  • the terminal device when the first indication information satisfies the second condition, the terminal device sends the aforementioned random access preamble sequence to the network device.
  • the network device when the network device believes that the first uplink data is incorrectly received because the TA is not updated in time, the network device can instruct the terminal device to send the random access preamble sequence. At this time, the network device estimates a new TA according to the random access preamble sequence, and uses the new TA to decode the first uplink data, so as to improve the decoding success rate of the first uplink data, thereby improving the reliability of data transmission.
  • the terminal device when the first indication information satisfies the third condition, the terminal device sends the second uplink data to the network device through the second uplink data channel.
  • the frequency resource is indicated by the above-mentioned first indication information.
  • the terminal device when the first indication information satisfies the fourth condition, the terminal device sends the second uplink data to the network device through the second uplink data channel.
  • the frequency resource is indicated by the first RRC message.
  • the network device when the network device considers that the failure to correctly receive the first uplink data is irrelevant to the timeliness of the TA, the network device instructs the terminal device to send the second uplink data on the time-frequency resource of the second uplink data channel. In this way, the terminal device does not need to send the random access preamble sequence, thereby improving the spectrum efficiency.
  • this application provides a method for uplink data transmission, and the execution subject of the method is a network device or a module in the network device.
  • the network device is taken as the execution subject as an example for description.
  • the network device receives the first uplink data from the terminal device; the network device sends first indication information to the terminal device, the first indication information indicating the feedback information of the first uplink data; when the first indication information satisfies the first condition, The network device receives the random access preamble sequence and the second uplink data from the terminal device, where the second uplink data is the retransmission data of the above-mentioned first uplink data.
  • the network device receives the first uplink data from the terminal device through the first uplink data channel, where the time-frequency resource of the first uplink data channel is indicated by the first RRC message of.
  • the time-frequency resource of the first uplink data channel is an unlicensed resource configured by the network device for the terminal device through the first RRC message.
  • the terminal device sends the first uplink data channel to the network device on the unlicensed resource.
  • the network device determines the second uplink data channel based on the foregoing random access preamble sequence and the mapping relationship between the random access preamble sequence and the time-frequency resource of the uplink data channel.
  • Time-frequency resources, where the second uplink data channel carries the above-mentioned second uplink data please refer to the first aspect, which will not be repeated here.
  • the network device when the foregoing first indication information satisfies the second condition, the network device receives the random access preamble sequence from the terminal device.
  • the network device when the first indication information satisfies the third condition, the network device receives the second uplink data from the terminal device through the second uplink data channel, and the time of the second uplink data channel is The frequency resource is indicated by the above-mentioned first indication information.
  • the network device when the first indication information satisfies the fourth condition, the network device receives the second uplink data from the terminal device through the second uplink data channel, and the time of the second uplink data channel is The frequency resource is indicated by the first RRC message.
  • a method for uplink data transmission is provided, and the execution subject of the method is a terminal device or a module in the terminal device.
  • the terminal device is taken as the execution subject as an example for description.
  • the terminal device sends the first uplink data to the network device; the terminal device receives the first indication information from the network device, the first indication information indicates the feedback information of the first uplink data; when the first indication information meets the second condition, the terminal The device sends a random access preamble sequence to the network device.
  • the terminal device sends the first uplink data to the network device through the first uplink data channel, where the time-frequency resource of the first uplink data channel is indicated by the first RRC message .
  • the time-frequency resource of the first uplink data channel is an unlicensed resource configured by the network device for the terminal device through the first RRC message. The terminal device sends the first uplink data channel to the network device on the unlicensed resource.
  • the present application provides a method for uplink data transmission, and the execution subject of the method is a network device or a module in the network device.
  • the network device is taken as the execution subject as an example for description.
  • the network device receives the first uplink data from the terminal device; the network device sends first indication information to the terminal device, the first indication information indicating the feedback information of the first uplink data; when the first indication information satisfies the second condition, The network device receives the random access preamble sequence from the terminal device.
  • the network device receives the first uplink data from the terminal device through the first uplink data channel, where the time-frequency resource of the first uplink data channel is indicated by the first RRC message of.
  • the time-frequency resource of the first uplink data channel is an unlicensed resource configured by the network device for the terminal device through the first RRC message.
  • the network device receives the first uplink data channel from the terminal device on the unlicensed resource.
  • the method further includes: the foregoing first indication information further indicates an index of the foregoing random access preamble sequence.
  • a method for uplink data transmission is provided, and the execution subject of the method is a terminal device or a module in the terminal device.
  • the terminal device is taken as the execution subject as an example for description.
  • the terminal device sends the first uplink data to the network device; the terminal device receives the first indication information from the network device, the first indication information indicates the feedback information of the first uplink data; when the first indication information satisfies the sixth condition, the terminal device
  • the random access preamble sequence and the third uplink data (message A) are sent to the network device, and the terminal device receives the feedback information (message B) of the third uplink data from the network device.
  • the terminal device can determine the uplink data transmission mode through the first indication information.
  • the terminal device uses the two-step access method to perform random access.
  • the network device can determine the TA according to the random access preamble sequence sent by the terminal device; at the same time, the terminal device will carry the third uplink data during the random access process, and the third uplink data carried here can use highly reliable Modulation and coding method to improve the reliability of data transmission.
  • this application provides a method for uplink data transmission, and the execution subject of the method is a network device or a module in the network device.
  • the network device is taken as the execution subject as an example for description.
  • the network device receives the first uplink data from the terminal device; the network device sends the first indication information to the terminal device, the first indication information indicates the feedback information of the first uplink data; when the first indication information satisfies the sixth condition: the network
  • a method for uplink data transmission is provided, and the execution subject of the method is a terminal device or a module in the terminal device.
  • the terminal device is taken as the execution subject as an example for description.
  • the terminal device sends the first uplink data to the network device; the terminal device receives the first indication information from the network device, the first indication information indicates the feedback information of the first uplink data; when the first indication information satisfies the seventh condition, the terminal device Send a random access preamble sequence (message 1) to the network device; the terminal device receives a random access response (message 2) from the network device, the random access response indicates the first uplink time-frequency resource; when the terminal device is in the first uplink
  • the fourth uplink data is sent on the frequency resource (message 3); the terminal device receives the feedback information of the fourth uplink data from the network device (message 4).
  • the terminal device can determine the uplink data transmission mode through the first indication information.
  • the terminal device uses the four-step access method to perform random access.
  • the network device can determine the TA according to the random access preamble sequence sent by the terminal device; at the same time, the terminal device will send the fourth uplink data to the network device during the random access process, and the fourth uplink data carried here can be used reliably. High-performance modulation and coding method, thereby improving the reliability of data transmission.
  • the present application provides a method for uplink data transmission, and the execution subject of the method is a network device or a module in the network device.
  • the network device is taken as the execution subject as an example for description.
  • the network device receives the first uplink data from the terminal device; the network device sends the first indication information to the terminal device, the first indication information indicates the feedback information of the first uplink data; when the first indication information satisfies the seventh condition, the network
  • the fourth uplink data from the terminal device is received on the uplink time-frequency resource (message 3); the network device sends the feedback information of the fourth uplink data to the terminal device (message 4).
  • a communication device may be a terminal device, or a device in a terminal device, or a device that can be matched and used with a terminal device.
  • the device includes any possible implementation of the first aspect, any possible implementation of the first aspect, the third aspect, any possible implementation of the third aspect, and any possible implementation of the fifth aspect and the fifth aspect.
  • the module corresponding to the method/operation/step/action described in the implementation manner, the seventh aspect or any possible implementation manner of the seventh aspect, the module may be a hardware circuit, software, or hardware circuit Combined with software implementation.
  • the device may include a processing module and a communication module.
  • a communication device may be a network device, a device in a network device, or a device that can be used in conjunction with a network device.
  • the device includes any possible implementation manner of the foregoing second aspect and the second aspect, any possible implementation manner of the fourth aspect and the fourth aspect, and any possible implementation manner of the sixth aspect and the sixth aspect.
  • the module can be a hardware circuit, software, or a hardware circuit combined with software.
  • the device may include a processing module and a communication module.
  • a communication device in an eleventh aspect, includes a processor, configured to implement any of the methods in the foregoing first aspect and any possible implementation of the first aspect, the third aspect, and any possible implementation of the third aspect.
  • the device includes a memory for storing instructions and/or data.
  • the memory is coupled with the above-mentioned processor, and when the above-mentioned processor executes the instructions stored in the memory, it can implement any of the methods in the foregoing first aspect and any possible implementation of the first aspect, the third aspect, and any possibility of the third aspect.
  • the device may further include a communication interface for sending and receiving information or data.
  • the communication interface may be a transceiver, an interface circuit, a bus, a module, a pin, or other types of communication interfaces.
  • the communication device includes a processor and an interface circuit, and the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or send signals from the processor
  • the processor is used to implement the method, the third aspect, and the third aspect of the foregoing first aspect and any possible implementation of the first aspect through logic circuits or execution code instructions.
  • the method in any possible implementation manner, the fifth aspect, the method in any possible implementation manner of the fifth aspect, the seventh aspect, or the method in any possible implementation manner of the seventh aspect.
  • a communication device in a twelfth aspect, includes a processor, configured to implement any possible method in the foregoing second aspect and any possible implementation of the second aspect, and any possible method in the fourth aspect and the fourth aspect.
  • the device includes a memory for storing instructions and/or data.
  • the memory is coupled to the processor, and when the processor executes the instructions stored in the memory, it can implement any of the methods in the foregoing second aspect and any possible implementation manner of the second aspect, and any possibility of the fourth aspect and the fourth aspect.
  • the device may further include a communication interface for sending and receiving information or data.
  • the communication interface may be a transceiver, an interface circuit, a bus, a module, a pin, or other types of communication interfaces.
  • the communication device includes a processor and an interface circuit, and the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or send signals from the processor
  • the processor is used to implement the methods in the foregoing second aspect and any possible implementation manner of the second aspect, the fourth aspect, and the fourth aspect through logic circuits or execution code instructions.
  • the method in any possible implementation manner, the sixth aspect, the method in any possible implementation manner of the sixth aspect, the eighth aspect or the method in any possible implementation manner of the eighth aspect.
  • a computer-readable storage medium stores a computer program or instruction.
  • the computer program or instruction When executed, it implements the first aspect and any of the first aspects.
  • the method in the possible implementation, the third aspect, the method in any possible implementation of the third aspect, the fifth aspect, the method in any possible implementation of the fifth aspect, the seventh aspect or the seventh aspect Any possible implementation method.
  • a computer-readable storage medium stores a computer program or instruction.
  • the computer program or instruction When executed, it implements any of the foregoing second aspect and the second aspect.
  • the method in the possible implementation, the fourth aspect, the method in any possible implementation of the fourth aspect, the sixth aspect, the method in any possible implementation of the sixth aspect, the eighth aspect, or the eighth aspect Any possible implementation method.
  • a computer program product containing instructions. When the instructions are executed, the method in any possible implementation manner of the first aspect and the first aspect, the third aspect, and the third aspect are implemented. The method in any possible implementation manner, the fifth aspect, the method in any possible implementation manner of the fifth aspect, the seventh aspect, or the method in any possible implementation manner of the seventh aspect.
  • a computer program product containing instructions is provided. When the instructions are executed, the method in any possible implementation of the second aspect and the second aspect, the fourth aspect, and the fourth aspect are implemented. The method in any possible implementation manner, the sixth aspect, the method in any possible implementation manner of the sixth aspect, the eighth aspect or the method in any possible implementation manner of the eighth aspect.
  • a computer program in a seventeenth aspect, includes code or instructions. When the code or instruction is executed, it implements the first aspect, the method in any possible implementation manner of the first aspect, and the third aspect. Aspect, the method in any possible implementation manner of the third aspect, the fifth aspect, the method in any possible implementation manner of the fifth aspect, the seventh aspect or the method in any possible implementation manner of the seventh aspect.
  • a computer program in an eighteenth aspect, includes code or instructions.
  • code or instruction When the code or instruction is executed, the method and the fourth aspect of the foregoing second aspect and any possible implementation manner of the second aspect are implemented. Aspect, the method in any possible implementation manner of the fourth aspect, the sixth aspect, the method in any possible implementation manner of the sixth aspect, the eighth aspect or the method in any possible implementation manner of the eighth aspect.
  • a chip system in a nineteenth aspect, includes a processor and may also include a memory for implementing at least one of the methods described in the first to eighth aspects.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • a communication system in a twentieth aspect, includes the device described in the ninth aspect or the eleventh aspect (such as terminal equipment) and the device described in the tenth aspect or the twelfth aspect (such as network equipment ).
  • FIG. 1 is a schematic diagram of the architecture of a communication system applied in an embodiment of the application
  • Figure 2- Figure 11 are schematic diagrams of the uplink data transmission process provided by the embodiments of the application.
  • FIG. 12 and FIG. 13 are schematic structural diagrams of possible communication devices provided by embodiments of this application.
  • LTE long term evolution
  • 5G fifth generation
  • WiFi wireless-fidelity
  • future communication system or a system integrating multiple communication systems, etc.
  • 5G can also be called new radio (NR).
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low-latency communication
  • MTC machine type communication
  • mMTC massive machine type communications
  • D2D device-to-device
  • V2X vehicle to everything
  • V2V vehicle to vehicle
  • IoT internet of things
  • Communication between communication devices may include: communication between a network device and a terminal device, communication between a network device and a network device, and/or communication between a terminal device and a terminal device.
  • the term “communication” can also be described as "transmission", “information transmission”, or “signal transmission” and so on. Transmission can include sending and/or receiving.
  • the technical solution is described by taking the communication between the network device and the terminal device as an example. Those skilled in the art can also use the technical solution for communication between other scheduling entities and subordinate entities, such as macro base stations and micro base stations.
  • Air interface resources include one or more of the following resources: time domain resources, frequency domain resources, code resources, and space resources.
  • the multiple types may be two, three, four, or more types, which are not limited in the embodiments of the present application.
  • the communication between the network device and the terminal device includes: the network device sends a downlink signal/information to the terminal device, and/or the terminal device sends an uplink signal/information to the network device.
  • "/" can indicate that the associated objects are in an "or” relationship.
  • A/B can indicate A or B; and "and/or” can be used to describe that there are three types of associated objects.
  • the relationship, for example, A and/or B can mean that: A alone exists, A and B exist at the same time, and B exists alone. Among them, A and B can be singular or plural.
  • words such as “first” and “second” may be used to distinguish technical features with the same or similar functions. The words “first” and “second” do not limit the quantity and order of execution, and the words “first” and “second” do not limit the difference.
  • words such as “exemplary” or “for example” are used to indicate examples, illustrations, or illustrations, and embodiments or design solutions described as “exemplary” or “for example” should not be interpreted as It is more preferable or advantageous than other embodiments or design solutions.
  • the use of words such as “exemplary” or “for example” is intended to present related concepts in a specific manner to facilitate understanding.
  • FIG. 1 is a schematic diagram of the architecture of a communication system to which an embodiment of the present application can be applied.
  • the communication system includes a network device 110 and at least one terminal device (the terminal device 120 and the terminal device 130 in FIG. 1).
  • the network device 110 may include a radio frequency unit and a baseband unit.
  • the baseband unit may include at least one of a demodulation module, a de-rate matching module, and a channel decoding module.
  • the terminal device (such as the terminal device 120 and the terminal device 130 in FIG. 1) may include a baseband unit and a radio frequency unit.
  • the baseband unit may include at least one of a channel coding module, a rate matching module, and a modulation module.
  • the channel encoding module can be implemented by an encoder, which is used to encode an information bit sequence and generate an encoded bit sequence.
  • the encoded bit sequence includes information bits and redundant bits.
  • the rate matching module is used to repeat or puncture the bits in the encoded bit sequence, so that the length of the bit sequence after the rate matching matches the transmission resource.
  • the modulation module is used to modulate and map the bit sequence obtained after rate matching into complex-valued modulation symbols, so as to improve transmission efficiency.
  • FIG. 1 is only a schematic diagram, and the embodiment of the present application does not limit the number of network devices and terminal devices included in the communication system.
  • Network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can be deployed on water; or, they can be deployed on airplanes, balloons, or satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of network equipment and terminal equipment.
  • Network equipment and terminal equipment can communicate through licensed spectrum, communicate through unlicensed spectrum, or communicate through licensed spectrum and unlicensed spectrum.
  • Network equipment and terminal equipment can communicate through a frequency spectrum below 6 gigahertz (gigahertz, GHz), communicate through a frequency spectrum above 6 GHz, or communicate using a frequency spectrum below 6 GHz and a frequency spectrum above 6 GHz.
  • the embodiment of the present application does not limit the spectrum resource used between the network device and the terminal device.
  • the terminal device involved in the embodiment of the present application may also be referred to as a terminal, and may be a device with a wireless transceiver function).
  • the terminal device may be a user equipment (UE), and the UE includes a handheld device with a wireless communication function, a vehicle-mounted device, a wearable device, or a computing device.
  • the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • Terminal devices can also be virtual reality terminal devices, augmented reality terminal devices, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, wireless terminals in smart grids, and wireless terminals in smart cities. , And/or wireless terminals in smart homes, etc.
  • the device used to implement the function of the terminal device may be a terminal device; it may also be a device capable of supporting the terminal device to implement the function, such as a chip system.
  • the device may be installed in the terminal device or connected to the terminal device. Matching use.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device used to implement the functions of the terminal device is a terminal device as an example to describe the technical solutions provided by the embodiments of the present application.
  • the network device involved in the embodiment of the present application includes a base station (BS), which may be a device that is deployed in a wireless access network and can communicate with terminal devices wirelessly.
  • Base stations may come in many forms, such as macro base stations, micro base stations, relay stations, and access points.
  • the base station involved in the embodiment of this application may be a base station in a 5G system or a base station in an LTE system.
  • the base station in the 5G system may also be called a transmission reception point (TRP) or a next-generation node B (generation Node B, gNB or gNodeB).
  • TRP transmission reception point
  • gNB next-generation node B
  • the device used to implement the function of the network device may be a network device; it may also be a device capable of supporting the network device to implement the function, such as a chip system, which may be installed in the network device or connected to the network device. Matching use.
  • the device used to implement the functions of the network equipment is a network device as an example to describe the technical solutions provided in the embodiments of the present application.
  • terminal equipment can access and communicate with network equipment.
  • one network device can manage one or more (for example, 3 or 6, etc.) cells, and the terminal device can access the network device in at least one of the one or more cells, and connect to the terminal device Communicate with network equipment in the cell where it is located.
  • at least one may be one, two, three, or more, which is not limited in the embodiments of the present application.
  • the data packets transmitted between the terminal device and the network device are relatively small.
  • the downlink data packets are mostly control signaling or management signaling
  • the uplink data packets are mostly feedback information after some actions are executed, simple location update messages, or information collected from outside.
  • These data packets are only a few bytes to tens of bytes. Most of these data packets are bursty, and because the data packets are relatively small, they can be transmitted in a transport block (TB) or a time slot.
  • TB transport block
  • the terminal device when the terminal device needs to perform specific data transmission of the terminal device with the network device, the terminal device needs to be in a radio resource control connection (radio resource control_connected, RRC_CONNECTED) state.
  • RRC_CONNECTED radio resource control connection
  • the network device knows that the terminal device is within the coverage or management range of the network device. For example, the network device knows that the terminal device is within the coverage of the cell managed by the network device; the core network knows which network the terminal device is on. Within the coverage or management range of the device, the core network knows through which network device the terminal device can be located or found.
  • the terminal device when there is no data transmission between the terminal device and the network device, in order to save power consumption of the terminal device, the terminal device can be converted to an RRC inactive state (radio resource control_inactive, RRC_INACTIVE) state.
  • RRC_INACTIVE radio resource control_inactive
  • the terminal device when the terminal device is in the RRC_INACTIVE state, there is no RRC connection between the terminal device and the network device.
  • the network device does not know whether the terminal device is within the coverage or management range of the network device, for example, the network device does not know whether the terminal device is within the coverage of the cell managed by the network device; the core network knows the terminal The core network knows through which network device the terminal device can be located or found within the coverage or management range of which network device the device is located.
  • the terminal device can receive paging messages, synchronization signals, broadcast messages, and/or system information from the network device.
  • the terminal device when the terminal device is in the RRC_INACTIVE state, if the terminal device needs to perform the terminal device-specific data transmission with the network device, in order to avoid the power consumption caused by the terminal device first converting to the RRC_CONNECTED state and then performing the data transmission And signaling overhead, allowing the terminal device to perform specific data transmission of the terminal device with the network device in the RRC_INACTIVE state.
  • the method provided in the embodiments of the present application is not limited to the small packet transmission scenario described above, and can also be used for data packet transmission of other sizes or data packet transmission in other scenarios to reduce signaling overhead.
  • An implementation manner for the terminal device to perform uplink data transmission with the network device in the RRC_INACTIVE state may be grant free, that is, the terminal device uses the license-free resource to send uplink data to the network device.
  • the uplink transmission of the terminal equipment does not need to be completed through the scheduling of the network equipment. For example, when uplink data arrives, the terminal device does not need to send a scheduling request (SR) to the network device and wait for the dynamic grant (dynamic grant) of the network device, but can directly use the transmission resources and assignments pre-allocated by the network device.
  • SR scheduling request
  • dynamic grant dynamic grant
  • authorization-free transmission is also referred to as “authorization-free scheduling” or “configured grant (CG)".
  • CG configured grant
  • the terminal device when the terminal device uses unlicensed resources to perform uplink data transmission unsuccessfully, the terminal device can be retransmitted. The new transmission and retransmission of the uplink data can be HARQ combined on the network device side, thereby improving transmission Success rate.
  • the network device when the terminal device uses unlicensed resources to perform uplink data transmission unsuccessfully, the network device can allow the terminal device to perform uplink data transmission with the network device through a random access process.
  • an embodiment of the present application provides an uplink data transmission method. After the terminal device sends the uplink data to the network device, the terminal device Determining the retransmission method according to the instruction information of the network device can not only improve the reliability of data transmission, but also improve the spectrum efficiency.
  • the terminal device when the terminal device sends uplink data to the network device, the terminal device may be in the RRC_INACTIVE state.
  • RRC_INACTIVE when the terminal device sends uplink data to the network device, the terminal device may be in the RRC_INACTIVE state.
  • these embodiments can be used in other RRC states of the terminal device, for example, it can be used in the RRC_CONNECTED state or the RRC idle state of the terminal device.
  • the terminal device when the terminal device is in the RRC idle state, there is no RRC connection between the terminal device and the network device.
  • the network device does not know whether the terminal device is within the coverage area of the network device or whether it is within the management range of the network device. For example, the network device does not know whether the terminal device is within the coverage area of the cell managed by the network device. Within; the core network does not know which network device is covered or managed by the terminal device, and the core network does not know which network device can locate or find the terminal device.
  • the terminal device When the terminal device is in the RRC idle state, the terminal device can receive a paging message, a synchronization signal, a broadcast message, and/or system information from the network device.
  • FIG. 2 is a schematic flowchart of an uplink data transmission method provided by an embodiment of the application. This embodiment relates to a specific process of uplink data transmission between a network device and a terminal device. As shown in Figure 2, the method may include: S101, S102, and S103a.
  • the terminal device sends first uplink data to the network device.
  • the network device receives the first uplink data.
  • the terminal device may send the first uplink data to the network device through the first uplink data channel.
  • the terminal device sends a first uplink data channel to the network device, and the first uplink data channel carries the first uplink data.
  • the network device receives the first uplink data channel, thereby receiving the first uplink data.
  • the first uplink data channel is a physical uplink shared channel (PUSCH).
  • PUSCH physical uplink shared channel
  • the physical downlink shared channel (PDSCH), PUSCH, physical downlink control channel (PDCCH), and physical uplink control channel (physical uplink control channel, PUCCH) is only used as an example of downlink data channel, uplink data channel, downlink control channel, and uplink control channel.
  • data channels and control channels may have different names. The implementation of this application The example does not limit this.
  • the time-frequency resource of the first uplink data channel is indicated by a first radio resource control (radio resource control, RRC) message.
  • RRC radio resource control
  • the time-frequency resource of the first uplink data channel is an unlicensed resource configured by the network device for the terminal device through the first RRC message.
  • the terminal device sends the first uplink data channel to the network device on the unlicensed resource.
  • the authorization-free resources can be divided into the following two types.
  • the first type of unlicensed resource the network device configures the transmission parameters of the unlicensed resource for the terminal device through the parameters in the RRC message (such as ConfiguredGrantConfig), such as configuring one or more of the following parameters of the uplink data channel: period, open loop Power control related parameters, waveform, redundancy version, redundancy version sequence, number of repetitions, frequency hopping mode, resource allocation type, hybrid automatic repeat request (HARQ) process number, demodulation reference signal (demodulation reference) signal, DMRS) related parameters, modulation and coding scheme (MCS) table, resource block group (Resource Block Group, RBG) size, time domain resource location, frequency domain resource location, and MCS.
  • RRC message such as ConfiguredGrantConfig
  • the second type of unlicensed resource the network device configures some or all of the transmission parameters to the terminal device through the RRC message, such as configuring one or more of the following parameters of the uplink data channel: the period of the time domain resource, the open-loop power control related parameters , Waveform, redundancy version, redundancy version sequence, number of repetitions, frequency hopping mode, resource allocation type, MCS table, DMRS related parameters, and HARQ process number; and the network device sends physical layer signaling to the terminal device, such as downlink Control information (downlink control information, DCI) to activate the second type of authorization-free resource.
  • DCI downlink control information
  • the DCI can also be used to configure some transmission parameters, for example, one or more of the following parameters of the uplink data channel: time domain resource location, frequency domain resource location, DMRS related parameters, and MCS.
  • the DCI may be carried through the PDCCH.
  • the terminal device can directly use the unlicensed resources pre-configured by the network device to send uplink data to the network device, without sending an SR to the network device and waiting for the dynamic authorization of the network device .
  • the second type of authorization-free resources need to be activated by physical layer signaling before they can be used by terminal devices.
  • the first uplink data in step S101 is specific information or unicast information of the terminal device.
  • the terminal device may send the terminal device specific information or unicast information to the network device through the terminal device specific data channel.
  • the terminal device may send the terminal device specific PUSCH to the network device.
  • a terminal device-specific PUSCH satisfies one or more of the following conditions: the transmission parameters of the PUSCH are specific to the terminal device or specific to the terminal device group in which the terminal device is located; the PUSCH is determined by the terminal device The specific PDCCH is activated; the cyclic redundancy check (CRC) parity bit of the PUSCH is scrambled by the identification of the terminal device; and, the information carried on the PUSCH is the terminal device Specific or specific to the terminal device group in which the terminal device is located.
  • the transmission parameters of the PUSCH are specific to the terminal device or specific to the terminal device group in which the terminal device is located
  • the PUSCH is determined by the terminal device The specific PDCCH is activated
  • the cyclic redundancy check (CRC) parity bit of the PUSCH is scrambled by the identification of the terminal device
  • the information carried on the PUSCH is the terminal device Specific or specific to the terminal device group in which the terminal device is located.
  • the foregoing terminal device-specific PDCCH satisfies one or more of the following conditions: the resource location of the PDCCH is specific to the terminal device; the CRC check bits of the PDCCH are scrambled by the terminal device's identity; And, the PDCCH is used to schedule the specific PUSCH of the terminal device.
  • the PDCCH carries the transmission parameters of the PUSCH, including time domain resource location, frequency domain resource location, MCS, modulation mechanism, coding mechanism, and transport block size (transport block size). at least one of block size, TBS), RV, frequency hopping indicator, and power control command.
  • the identifier of the terminal device may be the cell radio network temporary identifier (C-RNTI), semi-persistent scheduling (SPS) RNTI, or the terminal device’s cell radio network temporary identifier (C-RNTI).
  • C-RNTI cell radio network temporary identifier
  • SPS semi-persistent scheduling
  • RNTI radio network temporary identifier
  • Other types of radio network temporary identifier (RNTI) of the terminal device are not limited in the embodiment of this application.
  • the network device sends first indication information to the terminal device.
  • the terminal device receives the first indication information from the network device.
  • the first indication information may also be described as: feedback information for the first uplink data.
  • the first uplink data is processed into a transport block (TB), and then transmitted on the first uplink data channel.
  • the feedback information of the first uplink data can also be understood as: the feedback information of the TB .
  • S103a When the first indication information satisfies the first condition, the terminal device sends a random access preamble sequence and second uplink data to the network device.
  • the method can also be described as operation 1: When the first indication information satisfies the first condition, the network device indicates situation 1 to the terminal device. Case 1 can be described as: the terminal device sends the random access preamble sequence and the second uplink data to the network device.
  • the terminal device may send a random access preamble sequence to the network device on a physical random access channel (PRACH), and the random access preamble sequence is used to access the network device or For uplink synchronization with network equipment.
  • PRACH physical random access channel
  • the random access preamble sequence may also be referred to as an access preamble, an access preamble sequence, a random access preamble, or a preamble, which is not limited in the embodiment of the present application.
  • the first indication information indicates the index of the aforementioned random access preamble sequence
  • the terminal device determines the sequence value of the random access preamble sequence according to the index.
  • the network device configures a set of random access preamble sequences for the terminal device, the set of random access preamble sequences includes one or more random access preamble sequences, and the set of random access preamble sequences includes one or more random access preamble sequences. Each random access preamble sequence corresponds to an index.
  • the first indication information can indicate the index of one of the random access preamble sequences from the group of random access preamble sequences, and the terminal device sends the indicated random access preamble sequence to the network device sequence.
  • the type of random access preamble sequence is ZC (Zadoff-Chu) sequence.
  • the network device can assign a logical root sequence number of the ZC root sequence to the cell.
  • the logical root sequence number corresponds to a physical root sequence number
  • the physical root sequence number can be It is used to generate the ZC root sequence
  • the random access preamble sequence of the cell is generated according to the ZC root sequence.
  • the corresponding relationship between the logical root serial number and the physical root serial number can be described in the logical root serial number planning table.
  • Table 1 shows a logical root sequence number planning table defined by a protocol.
  • Table 1 there is a one-to-one correspondence between the logical root sequence number and the physical root sequence number. .
  • the terminal device can obtain a random access preamble sequence set of a cell by performing a cyclic shift (CS) on the ZC root sequence, as follows:
  • the terminal device reads the system parameters of the cell, determines the logical root sequence number of the cell from the system parameters of the cell, and obtains the corresponding physical root sequence number according to the logical root sequence number. For example, by looking up the above Table 1, if the logical root serial number is 0, the corresponding physical root serial number is 1, and if the logical root serial number is 1, the corresponding physical root serial number is 138.
  • the terminal device determines the corresponding ZC root sequence according to the physical root sequence number; the terminal device can use all available cyclic shifts of this ZC root sequence to generate the sequence. For example, for a cell, the random access preamble sequence generated by the cyclic shift of the ZC root sequence can be expressed as:
  • x u is the ZC root sequence
  • u is the physical root sequence number determined according to the logical root sequence number
  • Nzc is the length of the ZC root sequence x u
  • C v is the cyclic shift value
  • j is the imaginary unit
  • the square of the imaginary unit is equal to -1
  • ⁇ is the circumference of the circle.
  • the terminal device can determine the logical root sequence according to the above-mentioned logical root sequence number.
  • the next logical root sequence number with consecutive numbers uses the ZC root sequence corresponding to the next logical root sequence number to continue generating random access preamble sequences until the number of random access preamble sequences required by the cell is generated.
  • the number of random access preamble sequences required by the cell can be regarded as: a group of random access preamble sequences configured by the network equipment for the terminal equipment in the cell.
  • the terminal device may send the aforementioned determined random access preamble sequence to the network device on a PRACH opportunity (PRACH occasion, RO).
  • PRACH occasion PRACH occasion
  • RO includes time-frequency resources used to transmit random access preamble sequences.
  • the terminal device determines the RO in the following three ways:
  • the first indication information indicates the RO of the aforementioned random access preamble sequence.
  • the network device configures a group of ROs for the terminal device, the group of ROs includes one or more ROs, each RO in the group of ROs corresponds to an index, and the first indication information may indicate from the group of ROs.
  • An RO index The terminal device sends a random access preamble sequence to the network device on the indicated RO.
  • the network device configures a group of ROs for the terminal devices, and the group of ROs includes one or more ROs.
  • the terminal device randomly selects an RO from the group of ROs, and sends a random access preamble sequence to the network device on the selected RO.
  • the first indication information indicates the index of the aforementioned random access preamble sequence
  • the terminal device determines the RO used to send the random access preamble sequence according to the index.
  • the network device configures a group of ROs for the terminal device, each RO can carry one or more random access preamble sequences, and each random access preamble sequence of all the random access preamble sequences carried by the group RO Corresponding to an index, the index corresponding to each random access preamble sequence is different from each other.
  • the terminal device determines the random access preamble sequence according to the index of the random access preamble sequence carried in the first indication information, a group of ROs configured by the network device, and the index corresponding to each random access preamble sequence carried by the group of ROs
  • the RO where it is located.
  • the network device configures a group of ROs for the terminal device, and the group of ROs has two ROs, the first RO and the second RO.
  • the first RO carries 64 random access preamble sequences, and the indexes corresponding to these 64 random access preamble sequences are 0 to 63.
  • the second RO carries 64 random access preamble sequences, and the indexes corresponding to these 64 random access preamble sequences are 64 to 127.
  • the index of the random access preamble sequence indicated by the network device through the first indication information is 70, which means that the network device instructs the terminal device to use the second RO to send the random access preamble sequence.
  • the terminal device may use, but is not limited to, any one of the foregoing three methods to determine the RO. After determining the RO, the terminal device sends the foregoing random access preamble sequence to the network device on the RO.
  • the second uplink data is retransmitted data of the first uplink data.
  • the second uplink data may carry part or all of the first uplink data.
  • both the first uplink data and the second uplink data are data after channel coding and rate matching, where the redundancy version (redundancy version, RV) of the second uplink data is different from the redundancy version of the first uplink data .
  • both the first uplink data and the second uplink data are data obtained by performing channel coding and rate matching on the first bit sequence.
  • the second uplink data is retransmitted data of the first uplink data, which can also be understood as: the second uplink data is retransmitted data of the first bit sequence.
  • the terminal device uses an encoder to perform channel coding on a first bit sequence with a length of a bit, obtains a sequence with a length of b bits after channel coding, and places the sequence with a length of b bits in a buffer.
  • Each RV defines a different starting point, and the initial transmission (new transmission) and each retransmission of data use different RVs (that is, different starting points).
  • the initial transmission and each retransmission start from the corresponding starting point, and read bit by bit in the buffer until the required number of bits is reached. When the end of the buffer is read, and the required number of bits is still not reached, jump to the head of the buffer to continue reading.
  • the required number of bits is determined according to the resource size and modulation mode of the physical channel carrying the data.
  • the second uplink data is carried on the second uplink data channel.
  • the second uplink data channel is PUSCH.
  • the terminal device determines the time-frequency resource of the second uplink data channel, and sends the second uplink data channel to the network device on the time-frequency resource. There are four ways for the terminal device to determine the time-frequency resource of the second uplink data channel:
  • Determination method 1 The terminal device determines the time-frequency resource of the second uplink data channel according to the random access preamble sequence in step S103a and the mapping relationship between the random access preamble sequence and the time-frequency resource of the uplink data channel.
  • the mapping relationship between the random access preamble sequence and the time-frequency resource of the uplink data channel includes: the RO where the random access preamble sequence is located, the root sequence number of the random access preamble sequence, and the cyclic shift of the random access preamble sequence.
  • the mapping relationship may be any one of the following mapping relationships.
  • the mapping relationship may be preset by a protocol or indicated by the network device to the terminal device through the second RRC message.
  • Mapping relationship 1 The mapping relationship between the RO where the random access preamble sequence is located and the time-frequency resource of the uplink data channel.
  • the terminal device determines the RO according to the method described above.
  • the terminal device may determine the time-frequency resource of the second uplink data channel according to the determined RO and mapping relationship one (for example, Table 2).
  • the network device determines the time-frequency resource of the second uplink data channel according to the RO and the mapping relationship 1, and receives the second uplink data channel on the determined time-frequency resource.
  • Table 2 The mapping relationship between the RO where the random access preamble sequence is located and the time-frequency resource of the uplink data channel
  • Mapping relationship 2 The mapping relationship between the root sequence number of the random access preamble sequence and the time-frequency resource of the uplink data channel.
  • the root sequence number of the random access preamble sequence may be a physical root sequence number, or may be a logical root sequence number, which is not limited in this embodiment of the application.
  • the root sequence number of the random access preamble sequence is configured by the network device for the terminal device through high-level parameters.
  • the terminal device may determine the time-frequency resource of the second uplink data channel according to the root sequence number of the random access preamble sequence and the second mapping relationship (for example, Table 3).
  • the network device determines the time-frequency resource of the second uplink data channel according to the root sequence number of the random access preamble sequence and the second mapping relationship, and receives the second uplink data channel on the determined time-frequency resource.
  • Table 3 The mapping relationship between the root sequence number of the random access preamble sequence and the time-frequency resource of the uplink data channel
  • Root serial number The time-frequency resource of the uplink data channel corresponding to the root sequence number Serial number A Time-frequency resource A Serial number B Time frequency resource B
  • Mapping relationship 3 The mapping relationship between the root sequence number of the random access preamble sequence and the cyclic shift value of the random access preamble sequence, and the time-frequency resource of the uplink data channel.
  • the root sequence number of the random access preamble sequence and the cyclic shift value of the random access preamble sequence may be configured by the network device for the terminal device, or may be selected by the terminal device itself.
  • the terminal device may determine the time-frequency resource of the second uplink data channel according to the root sequence number of the random access preamble sequence, the cyclic shift value of the random access preamble sequence, and the mapping relationship 3 (for example, Table 4).
  • the network device determines the time-frequency resource of the second uplink data channel according to the root sequence number of the random access preamble sequence, the cyclic shift value of the random access preamble sequence, and the mapping relationship 3.
  • the second uplink data channel is received on the time-frequency resource.
  • Table 4 The mapping relationship between the root sequence number of the random access preamble sequence and the cyclic shift value of the random access preamble sequence and the time-frequency resource of the uplink data channel
  • Root serial number Cyclic shift value Time-frequency resources of the uplink data channel Serial number A X Time-frequency resource A Serial number A Y Time frequency resource B Serial number B X Time frequency resource C Serial number B Y Time-frequency resource D
  • the network device may determine the time-frequency resource of the second uplink data channel according to the random access preamble sequence and the mapping relationship between the random access preamble sequence and the time-frequency resource of the uplink data channel.
  • the network device may also first determine the time-frequency resource of the second uplink data channel, and then determine according to the time-frequency resource of the second uplink data channel and the mapping relationship between the random access preamble sequence and the time-frequency resource of the uplink data channel Randomly access the preamble sequence, and then determine the index of the random access preamble sequence, and send the index to the terminal device.
  • the first indication information also indicates the time domain resource and/or frequency domain resource of the second uplink data channel, and the terminal device determines the time-frequency resource of the second uplink data channel according to the first indication information.
  • the time domain resource of the channel or information may be one or more of the following parameters used to transmit the channel or information: radio frame, subframe, time slot, sub time slot, mini time Gap, period, symbol, etc.
  • the frequency domain resource of the channel or information may be one or more of the following parameters used to transmit the channel or information: bandwidth part (BWP), resource block group (resource block) group, RBG), resource block (resource block, RB), sub-carrier, etc.
  • BWP bandwidth part
  • RBG resource block group
  • RRB resource block
  • sub-carrier etc.
  • the manner in which the first indication information indicates the time domain resource and/or frequency domain resource of the second uplink data channel includes but is not limited to the following three: the first indication information indicates the time domain resource location of the second uplink data channel, and the first indication information indicates the time domain resource location of the second uplink data channel. 2.
  • the frequency domain resource position of the uplink data channel is pre-configured; or, the first indication information indicates the frequency domain resource position of the second uplink data channel, and the time domain resource position of the second uplink data channel is pre-configured; or, An indication information indicates the time domain resource location of the second uplink data channel and the frequency domain resource location of the second uplink data channel.
  • Determination method 3 The terminal device receives second indication information from the network device, the second indication information indicates the time domain resource and/or frequency domain resource of the second uplink data channel, and the second uplink data channel carries the second uplink data, The terminal device sends the second uplink data to the network device on the time-frequency resource of the second uplink data channel.
  • the second indication information is a fourth RRC message or DCI. Among them, the fourth RRC message is different from the first RRC message.
  • the second indication information indicates the time domain resource of the second uplink data channel, and the frequency domain resource of the second uplink data channel is pre-configured; the second indication information indicates the time domain resource of the second uplink data channel. Frequency domain resources, the time domain resources of the second uplink data channel are pre-configured; or, the second indication information indicates the time frequency resources of the second uplink data channel.
  • the time-frequency resource of the second uplink data channel is indicated by the first RRC message. Specifically, the time-frequency resource of the second uplink data channel is an unlicensed resource configured by the network device for the terminal device through the parameter in the first RRC message. The terminal device determines the time-frequency resource of the second uplink data channel through the first RRC message.
  • the terminal device may determine the time-frequency resource of the second uplink data channel based on any one of the foregoing four determination methods, and send the second uplink data to the network device on the time-frequency resource.
  • the terminal device may also send the random access preamble sequence and the second uplink data to the network device in the following manner: the random access preamble sequence, the RO for sending the random access preamble sequence, and the time-frequency of the second uplink data channel Resource configuration information is broadcast to terminal devices by network devices through system information block (SIB) messages.
  • SIB system information block
  • the SIB message carries a configuration table
  • the configuration table includes multiple sets of the above-mentioned configuration information
  • the network device indicates one set to the terminal device through the first indication information.
  • the network device indicates the serial number of one set in the configuration table to the terminal device through the first indication information.
  • the terminal device obtains the configuration information through the number, determines the RO, the random access preamble sequence, and the time-frequency resource of the second uplink data channel through the configuration information, and sends the random access preamble sequence on the RO, and sends the random access preamble sequence on the second uplink.
  • the second uplink data is sent on the time-frequency resource of the data channel.
  • S103a further includes at least one of the following operations:
  • Operation 2 When the first indication information satisfies the second condition, the network device indicates situation 2 to the terminal device. Case 2 can be described as: the terminal device sends a random access preamble sequence to the network device, where the method for the terminal device to determine the random access preamble sequence can be referred to the foregoing description;
  • the network device When the first indication information satisfies the third condition, the network device indicates situation 3 to the terminal device.
  • Case 3 can be described as: the terminal device sends the second uplink data to the network device through the second uplink data channel.
  • the time-frequency resource of the second uplink data channel is the time-frequency resource scheduled by the network device through signaling.
  • the terminal device determines the time-frequency resource of the second uplink data channel refer to the determination method two or the determination method three in the foregoing;
  • Operation 4 When the first indication information satisfies the fourth condition, the network device indicates situation 4 to the terminal device. Case 4 can be described as: the terminal device sends the second uplink data to the network device through the second uplink data channel.
  • the time-frequency resource of the second uplink data channel is an unlicensed resource pre-configured by the network device. For the manner in which the terminal device determines the time-frequency resource of the second uplink data channel, refer to the determination manner 4 in the foregoing;
  • Operation 5 When the first indication information satisfies the fifth condition, the network device indicates situation 5 to the terminal device. Case 5 can be described as: the terminal device correctly receives the first uplink data from the terminal device.
  • the reason why the network device indicates to the terminal device other conditions except for case 5 may be that the network device does not correctly receive the first uplink data from the terminal device, but the embodiment of the present application is not limited to this.
  • S103a may also include one, two, three, or four of operations 2, operation 3, operation 4, and operation 5.
  • S103a may also include one of operation 2, operation 3, operation 4, and operation 5. There are four possible implementation methods in total.
  • Figure 3 shows one possible implementation method: S103a includes operation 5 in addition to operation 1. The other three possible implementation methods are shown in FIG. 3, which are not shown one by one here.
  • S103a may also include two of operation 2, operation 3, operation 4, and operation 5.
  • Figure 4 shows one of the possible implementation methods: S103a includes operation 4 and operation 5 in addition to operation 1. The other five possible implementation methods are shown in Fig. 4, which will not be shown one by one here.
  • S103a may also include three of operations 2, operation 3, operation 4, and operation 5. There are four possible implementation methods in total.
  • Figure 5 shows one possible implementation method: S103a includes operation 3, operation 4, and operation 5 in addition to operation 1. The other three possible implementation methods are shown in FIG. 5, which will not be shown one by one here.
  • S103a may also include four of operations 2, operation 3, operation 4, and operation 5. There is one possible implementation method in total. As shown in FIG. 6, in addition to operation 1, S103a also includes operation 2, operation 3, operation 4, and operation 5.
  • S103a only includes operation 1.
  • the network device instructs the terminal device to send the random access preamble sequence and the second uplink data to the network device.
  • the terminal device When the terminal device does not receive the first indication information; or, when the terminal device does not receive the first indication information within the time unit n+k, the terminal device considers that the first uplink data is correctly received by the network device.
  • n is the number of the time unit for the terminal device to send the first uplink data to the network device
  • n, k are non-negative integers
  • the time unit can be a time slot, sub-slot, mini-slot, or sub-frame.
  • the network device can indicate a situation to the terminal device from among the N candidate situations through the first indication information.
  • N is a positive integer greater than or equal to 1.
  • the first indication information may indicate a situation to the terminal device from the N kinds of candidate situations, explicitly or implicitly.
  • Indication mode 1 The first indication information explicitly indicates a situation for the terminal device from the N candidate situations:
  • the first indication information includes a first bit field, and the first bit field includes M bits, Where M and N are positive integers, and N represents the number of all possible situations indicated by the network device through the first indication information, Indicates rounding up.
  • the bit value of the first bit field is L, it means that the network device indicates the L+1th situation for the terminal device from the N candidate situations.
  • L is an integer, and 0 ⁇ L ⁇ N.
  • the network device can indicate to the terminal device one of the two candidate situations from the case 1 and the case 5 through the first indication information.
  • An optional method When the value of this bit is "0", it means that the network device indicates situation 1 to the terminal device, and when the value of this bit is "1", it means that the network device indicates situation 5 to the terminal device. .
  • the above-mentioned first condition is that the value of the M bit is "0”
  • the fifth condition is that the value of the M bit is "1".
  • the network device can indicate to the terminal device one of the three candidate situations from the situation 1, the situation 4, and the situation 5 through the first indication information.
  • the values of these 2 bits can be: "00", “01”, “10”, and “11”, and any three of these four values indicate case 1, case 4, and case 5, respectively.
  • the possible combinations are shown in Table 5. In the embodiment of the present application, it may be any one of the 24 combinations, which is not limited in the embodiment of the present application.
  • the network device can indicate to the terminal device one of the four candidate situations from the case 1, the case 3, the case 4, and the case 5 through the first indication information.
  • M 2 that is, the first bit field includes 2 bits.
  • the values of these 2 bits can be: "00", “01”, “10” and “11”, and these 4 values indicate case 1, case 3, case 4, and case 5 respectively.
  • the possible combinations are shown in Table 6. In the embodiment of the present application, it may be any one of the 24 combinations, which is not limited in the embodiment of the present application.
  • the network device can indicate to the terminal device one of the five candidate situations from Case 1, Case 2, Case 3, Case 4, and Case 5 through the first indication information.
  • M 3, that is, the first bit field includes 3 bits.
  • the value of these 3 bits has 8 values, namely: "000", “001”, “010”, “011”, “100”, “101", “110” and "111".
  • One of these 6720 combinations can be: when the value of these 3 bits is "000”, it means that the network device indicates case 1 to the terminal device, and when the value of these 3 bits is "001", it means that the network device Indicate case 2 to the terminal device. When the value of these 3 bits is "010”, it means that the network device indicates case 3 to the terminal device. When the value of these 3 bits is "011”, it means that the network device indicates to the terminal device. In case 4, when the value of these 3 bits is "100”, it means that the network device indicates case 5 to the terminal device.
  • the first condition is that the value of the M bit is "000”
  • the second condition is that the value of the M bit is "001”
  • the third condition is that the value of the M bit is "010”
  • the foregoing fourth condition is that the value of the M bit is "011”
  • the foregoing fifth condition is that the value of the M bit is "100”.
  • the foregoing embodiment an indication, the first indication information or the third RRC message DCI.
  • the first indication information is a third RRC message
  • the third RRC message is different from the above-mentioned first RRC message
  • the third RRC message is different from the fourth RRC message
  • the third RRC message and the second RRC message may be the same or different.
  • the time-frequency resource carrying the first indication information may be notified by the network device to the terminal device through signaling or pre-configured, which is not limited in the embodiment of the present application.
  • the network device when the first indication information is DCI, the network device carries the time-frequency resource information of the DCI in the first RRC message, and the terminal device obtains the time-frequency resource information of the DCI through the first RRC message;
  • the network device sends DCI to the terminal device.
  • the DCI carries the time-frequency resource information of the PDSCH carrying the third RRC message.
  • the device on the terminal obtains the time-frequency of the PDSCH carrying the third RRC message through the DCI Resource information.
  • Indication mode 2 The first indication information implicitly indicates a situation for the terminal device from the N candidate situations.
  • Means Indication mode two includes indication mode 2.1 and indication mode 2.2.
  • Indication mode 2.1 When the scrambling sequence used for the CRC check bits of the first indication information is the i-th radio network temporary identifier (RNTI), it indicates the situation corresponding to the first indication information indication number i. Among them, i is used to represent the number of each of these N cases, and the value of i is 1, 2, 3...N.
  • RNTI radio network temporary identifier
  • the first indication information may have N candidate scrambling sequences, which are respectively: the first RNTI, the second RNTI...the Nth RNTI.
  • the mapping relationship between the N scrambling sequences and the N candidate situations may be preset by the protocol, or configured by the network equipment to the terminal equipment through RRC signaling or MAC signaling.
  • the network device selects a scrambling sequence from the N candidate scrambling sequences to scramble the CRC check bit of the first indication information.
  • the terminal device when the terminal device receives the first indication information, it blindly decodes the first indication information, that is, the terminal device tries to use one or more of the above N candidate scrambling sequences to perform the first
  • the CRC check bit of the indication information is descrambled.
  • the terminal device uses the i-th scrambling sequence to correctly descramble the first indication information, it means that the network device indicates the situation i to the terminal device.
  • the network device can indicate to the terminal device one of the two candidate situations from the case 1 and the case 5 through the first indication information.
  • case 1 is numbered 1
  • case 5 is numbered 2.
  • the scrambling sequence used by the first indication information is the first RNTI
  • the scrambling sequence used by the first indication information is the second RNTI
  • the network device indicates the terminal device Situation 5.
  • the foregoing first condition is that the scrambling sequence used by the first indication information is the first RNTI
  • the foregoing fifth condition is that the scrambling sequence used by the first indication information is the second RNTI.
  • the network device can indicate one of the situations from Case 1, Case 4, and Case 5 to the terminal device through the first indication information.
  • case 1 is numbered 1
  • case 4 is numbered 2
  • case 5 is numbered 3.
  • the scrambling sequence used by the first indication information is the first RNTI
  • the network device indicates case 1 to the terminal device
  • the scrambling sequence used by the first indication information is the second RNTI
  • the scrambling sequence used by the first indication information is the third RNTI, it means that the network device indicates case 5 to the terminal device.
  • the first condition is that the scrambling sequence used by the first indication information is the first RNTI
  • the fourth condition is that the scrambling sequence used by the first indication information is the second RNTI
  • the fifth condition is The scrambling sequence used by the first indication information is the third RNTI.
  • the network device can indicate one of the situations from the case 1, the case 3, the case 4, and the case 5 to the terminal device through the first indication information.
  • case 1 is numbered 1
  • case 3 is numbered 2
  • case 4 is numbered 3
  • case 5 is numbered 4.
  • the scrambling sequence used by the first indication information is the first RNTI
  • the network device indicates case 1 to the terminal device
  • the scrambling sequence used by the first indication information is the second RNTI
  • the scrambling sequence used by the first indication information is the third RNTI, it means that the network equipment indicates to the terminal equipment Case 4.
  • the scrambling sequence used by the first indication information is the fourth RNTI
  • the first condition is that the scrambling sequence used by the first indication information is the first RNTI
  • the third condition is that the scrambling sequence used by the first indication information is the second RNTI
  • the fourth condition is The scrambling sequence used by the first indication information is the third RNTI
  • the fifth condition is that the scrambling sequence used by the first indication information is the fourth RNTI.
  • the network device can indicate to the terminal device one of the situations from Case 1, Case 2, Case 3, Case 4, and Case 5 through the first indication information.
  • case 1 is numbered 1
  • case 2 is numbered 2
  • case 3 is numbered 3
  • case 4 is numbered 4
  • case 5 is numbered 5.
  • the scrambling sequence used by the first indication information is the first RNTI
  • the network device indicates case 1 to the terminal device
  • the scrambling sequence used by the first indication information is the second RNTI
  • the scrambling sequence used by the first indication information is the 3rd RNTI
  • the scrambling sequence used by the first indication information is the 4th RNTI
  • the device indicates case 4, when the scrambling sequence used by the first indication information is the fifth RNTI, it means that the network device indicates case 5 to the terminal device.
  • the first condition is that the scrambling sequence used by the first indication information is the first RNTI
  • the second condition is that the scrambling sequence used by the first indication information is the second RNTI
  • the third condition is The scrambling sequence used by the first indication information is the third RNTI
  • the fourth condition is that the scrambling sequence used by the first indication information is the fourth RNTI
  • the fifth condition is the scrambling sequence used by the first indication information.
  • the scrambling sequence is the fifth RNTI.
  • Indication mode 2.2 When the downlink time-frequency resource carrying the first indication information is the i-th downlink time-frequency resource, it indicates that the first indication information corresponds to the number i. Among them, i is used to represent the number of each of these N cases, and the value of i is 1, 2, 3...N.
  • N candidate downlink time-frequency resources that can carry the first indication information, which are: the first downlink time-frequency resource, the second downlink time-frequency resource...the Nth downlink time-frequency resource.
  • the mapping relationship between the N downlink time-frequency resources and the N candidate situations may be preset by the protocol, or configured by the network device to the terminal device through RRC signaling or MAC signaling.
  • the network device selects one downlink time-frequency resource from the N candidate downlink time-frequency resource types to carry the first indication information.
  • the terminal device tries to receive the first indication information from the network device on one or more downlink time-frequency resources among the aforementioned N candidate downlink time-frequency resources.
  • the terminal device receives the first indication information from the network device in the i-th downlink time-frequency resource, it means that the network device indicates the situation i to the terminal device.
  • the network device can indicate one of the situations to the terminal device from Case 1 and Case 5 through the first indication information.
  • case 1 is numbered 1
  • case 5 is numbered 2.
  • the time-frequency resource carrying the first indication information is the first downlink time-frequency resource, it means that the network device indicates situation 1 to the terminal device, and when the time-frequency resource carrying the first indication information is the second downlink time-frequency resource, Indicates that the network device indicates situation 5 to the terminal device.
  • the above-mentioned first condition is that the time-frequency resource carrying the first indication information is the first downlink time-frequency resource
  • the above-mentioned fifth condition is that the time-frequency resource carrying the first indication information is the second downlink time-frequency resource.
  • Another alternative is to number Case 1 as 2, and Case 5 as 1.
  • the time-frequency resource carrying the first indication information is the first downlink time-frequency resource
  • the time-frequency resource carrying the first indication information is the second downlink time-frequency resource
  • the first condition is that the time-frequency resource carrying the first indication information is the second downlink time-frequency resource
  • the fifth condition is that the time-frequency resource carrying the first indication information is the first downlink time-frequency resource.
  • the network device can indicate one of the situations from Case 1, Case 4, and Case 5 to the terminal device through the first indication information.
  • case 1 is numbered 1
  • case 4 is numbered 2
  • case 5 is numbered 3.
  • the time-frequency resource carrying the first indication information is the first downlink time-frequency resource, it means that the network device indicates situation 1 to the terminal device, and when the time-frequency resource carrying the first indication information is the second downlink time-frequency resource, It means that the network device indicates situation 4 to the terminal device.
  • the time-frequency resource carrying the first indication information is the third downlink time-frequency resource, it means that the network device indicates situation 5 to the terminal device.
  • the first condition is that the time-frequency resource carrying the first indication information is the first downlink time-frequency resource
  • the fourth condition is that the time-frequency resource carrying the first indication information is the second downlink time-frequency resource.
  • the fifth condition is that the time-frequency resource carrying the first indication information is the third downlink time-frequency resource. Similar to the indication method 2.1, there are 6 ways of numbering Case 1, Case 4 and Case 5, and the above numbering method is only an example of these 6 types. In the other five numbering modes, the indication mode of the first indication information is similar to the indication mode of the first indication information under the above numbering mode, and will not be repeated here.
  • the network device can indicate one of the situations from the case 1, the case 3, the case 4, and the case 5 to the terminal device through the first indication information.
  • case 1 is numbered 1
  • case 3 is numbered 2
  • case 4 is numbered 3
  • case 5 is numbered 4.
  • the time-frequency resource carrying the first indication information is the first downlink time-frequency resource
  • the time-frequency resource carrying the first indication information is the second downlink time-frequency resource
  • the network device indicates situation 3 to the terminal device.
  • the time-frequency resource carrying the first indication information is the third downlink time-frequency resource
  • the time-frequency resource carrying the first indication information When it is the fourth downlink time-frequency resource, it means that the network device indicates situation 5 to the terminal device.
  • the first condition is that the time-frequency resource carrying the first indication information is the first downlink time-frequency resource
  • the third condition is that the time-frequency resource carrying the first indication information is the second downlink time-frequency resource.
  • the fourth condition is that the time-frequency resource that carries the first indication information is the third downlink time-frequency resource
  • the fifth condition is that the time-frequency resource that carries the first indication information is the fourth downlink time-frequency resource.
  • the indication mode of the first indication information is similar to the indication mode of the first indication information under the above-mentioned numbering mode, and will not be repeated here.
  • the network device can indicate to the terminal device one of the situations from Case 1, Case 2, Case 3, Case 4, and Case 5 through the first indication information.
  • the time-frequency resource carrying the first indication information is the first downlink time-frequency resource, it means that the network device indicates situation 1 to the terminal device, and when the time-frequency resource carrying the first indication information is the second downlink time-frequency resource, Indicates that the network device indicates situation 2 to the terminal device.
  • the time-frequency resource carrying the first indication information is the third downlink time-frequency resource, it indicates that the network device indicates situation 3 to the terminal device.
  • the time-frequency resource carrying the first indication information When it is the fourth downlink time-frequency resource, it means that the network device indicates case 4 to the terminal device.
  • the time-frequency resource carrying the first indication information is the fifth downlink time-frequency resource, it means that the network device indicates case 5 to the terminal device.
  • the above-mentioned first condition is that the time-frequency resource carrying the first indication information is the first downlink time-frequency resource
  • the above-mentioned second condition is that the time-frequency resource carrying the first indication information is the second downlink time-frequency resource.
  • the third condition is that the time-frequency resource that carries the first indication information is the third downlink time-frequency resource
  • the fourth condition is that the time-frequency resource that carries the first indication information is the fourth downlink time-frequency resource
  • the fifth condition is that the time-frequency resource that carries the first indication information is the fourth downlink time-frequency resource.
  • the time-frequency resource of the first indication information is the fifth downlink time-frequency resource.
  • the first indication information may be a DCI.
  • the first indication information may be a specific sequence; or, the first indication information may also be a bit (for example, bit "0" or bit "1"); or, the first indication information only represents an energy value
  • the first indication information includes the time-frequency resource information of the second uplink data channel, or the first indication information includes the configuration information of the unlicensed resource, or the first indication information includes the index of the random access preamble sequence.
  • S103a includes operation 1, or, S103a includes operation 1, but also includes one or more of operation 2, operation 3, operation 4, and operation 5.
  • the terminal device when the network device indicates situation 1 to the device on the terminal through the first indication information, the terminal device sends the random access preamble sequence and the second uplink data to the network device.
  • the network device receives the random access preamble sequence and the second uplink data from the terminal device.
  • the terminal device when the network device indicates situation 2 to the device on the terminal through the first indication information, the terminal device sends a random access preamble sequence to the network device. Correspondingly, the network device receives the random access preamble sequence from the terminal device.
  • the terminal device obtains the time-frequency resource of the second uplink data channel, and sends the second uplink data on the time-frequency resource.
  • the network device receives the second uplink data from the terminal device in the time-frequency resource of the second uplink data channel.
  • the terminal device when the network device indicates situation 4 to the device on the terminal through the first indication information, the terminal device sends the second uplink data to the network device on the unlicensed resource. Correspondingly, the network device receives the second uplink data from the terminal device on the unlicensed resource.
  • operation 1 or operation 3 or operation 4 may further include: the terminal device receives feedback information of the second uplink data sent by the network device , The terminal device determines a situation indicated by the network device for the terminal device in the W situations through the feedback information of the second uplink data.
  • W is a positive integer
  • the W cases may include, but are not limited to, one or more of the above-mentioned case 1, case 2, case 3, case 4, and case 5.
  • the network device may instruct the terminal device to use but not limited to the method described in any one of Case 1, Case 2, Case 3, and Case 4 to retransmit , Until the network device receives correctly or the number of retransmissions by the terminal device is greater than the threshold.
  • the threshold value is preset by the protocol or configured by the network device to the terminal device through high-level signaling.
  • the threshold value is a positive integer, for example, 3 times.
  • the W situations that can be indicated by the feedback information of the second uplink data are the same as the foregoing N situations that can be indicated by the first indication information.
  • the feedback information of the second uplink data is the same as the first indication information.
  • the W situations that can be indicated by the feedback information of the second uplink data include one or more of the above N situations that can be indicated by the first indication information.
  • the W cases may also include the following One situation: the feedback information of the second uplink data may be a random access response (message 2).
  • the random access response is the same as the first indication information, and the random access response instructs the network device to pass the random access
  • the terminal device sends uplink data (message 3) to the network device on the time-frequency resource.
  • the uplink data includes the retransmission data of the first uplink data or the second uplink data.
  • the network device sends the feedback information (message 4) of the uplink data to the terminal device.
  • the feedback information is the same as the first indication information. After the terminal device receives the feedback information, the terminal device returns to steps S102 and S103a until the network device receives the feedback information correctly. Or the number of retransmissions by the terminal device is greater than the threshold (as shown in Figure 7).
  • operation 2 may further include: the network device uses the random access preamble sequence sent by the terminal device to estimate the new timing advance; the network device uses the new TA to perform the first uplink The data is demodulated and decoded for the second time and feedback information is generated; the network device sends the feedback information to the terminal device, and uses the feedback information to indicate a situation to the terminal device from among the W situations.
  • W is a positive integer
  • the W cases may include, but are not limited to, one or more of the above-mentioned case 1, case 2, case 3, case 4, and case 5.
  • operation 5 may further include: the terminal device transmits new data based on the unlicensed resource, for example, the terminal device uses the network device to pass the parameters in the first RRC message as the terminal device The configured authorization-free resource sends new data to the network device.
  • the third condition and the fourth condition may be the same.
  • the terminal device obtains the time-frequency resource of the second uplink data channel through the first indication information or the second indication information, it means that the network device instructs the terminal device to send the second uplink data on the time-frequency resource of the second uplink data channel ; If the terminal device does not receive the indication information from the network device indicating the time-frequency resource of the second uplink data channel, it means that the network device instructs the terminal device to use the unlicensed resource to send the second uplink data.
  • step S103a can be replaced by the following step S103b.
  • S103b When the first indication information satisfies the second condition, the terminal device sends a random access preamble sequence to the network device.
  • the method can also be described as operation 2: when the first indication information satisfies the second condition, the network device indicates situation 2 to the terminal device.
  • Case 2 can be described as: the terminal device sends a random access preamble sequence to the network device.
  • S103b may only include operation 2.
  • the network device instructs the terminal device to send a random access preamble sequence to the network device.
  • the terminal device When the terminal device does not receive the first indication information; or, when the terminal device does not receive the first indication information within the time unit n+k, the terminal device considers that the first uplink data is correctly received by the network device.
  • n is the number of the time unit for the terminal device to send the first uplink data to the network device
  • n, k are non-negative integers
  • the time unit can be a time slot, sub-slot, mini-slot, or sub-frame.
  • S103b also includes at least one of operation 1, operation 3, operation 4, and operation 5 in S103a: S103b also includes operation 1, operation 2, and operation 2 in S103a. One, two, three or four of operation 4 and operation 5.
  • the network device can indicate a situation to the terminal device from among the N candidate situations through the first indication information.
  • S103a For the specific indication manner of the first indication information, refer to S103a, which will not be repeated here. It can be understood that the descriptions of operation 1, operation 2, operation 3, operation 4, and operation 5 in S103a are also applicable to S103b.
  • the first condition, the second condition, the third condition, the fourth condition, and the fifth condition are also applicable. The description of the conditions also applies to S103b.
  • the foregoing embodiment provides a method for uplink data transmission.
  • the network device When the network device does not correctly receive the first uplink data from the terminal device, the network device instructs the terminal device to retransmit through the first indication information.
  • the network device controls the TA of each terminal device in the cell to send the uplink signal, thereby controlling the time when the uplink signal from different terminal devices reaches the network device.
  • the network device may cause the network device to fail to receive the first uplink data correctly.
  • the network device may instruct the terminal device to send a random access preamble sequence (corresponding to operation 2).
  • the network device estimates a new TA according to the random access preamble sequence, and uses the new TA to demodulate and decode the first uplink data, thereby improving the decoding success rate of the first uplink data, thereby improving the reliability of data transmission sex.
  • the network device can instruct the terminal device to send the random access preamble sequence and the second uplink data (corresponding to operation 1) .
  • the network device can either update the TA through the random access preamble sequence, and obtain the retransmission combined gain through the second uplink data, thereby improving the decoding success rate of the first uplink data and the second uplink data, thereby increasing the first uplink data. Reliability of data transmission.
  • the network device instructs the terminal device to send the second uplink data on the time-frequency resource of the second uplink data channel.
  • the terminal device obtains the time-frequency resource of the second uplink data channel, and sends the second uplink data on the time-frequency resource (corresponding to operation 3 and operation 4).
  • the time-frequency resource of the second uplink data channel may be instructed by the network device to the terminal device through the indication information (corresponding to operation 3), or the time-frequency resource of the second uplink data channel is the authorization-free configuration of the network device for the terminal device Resources (corresponding to operation 4).
  • the terminal device does not need to send the random access preamble sequence, thereby improving the spectrum efficiency.
  • the network device can flexibly instruct the terminal device to retransmit the manner according to actual conditions.
  • the network device determines the validity of the TA and instructs the terminal device to retransmit, avoiding the terminal device from independently selecting the retransmission method, thereby avoiding the data transmission caused by the inaccurate estimation of the TA by the terminal device
  • the network equipment does not need to reserve unlicensed resources for retransmission and random access preamble sequences for terminal equipment, which improves the spectrum efficiency.
  • FIG. 9 is a schematic flowchart of an uplink data transmission method provided by an embodiment of the present application.
  • This embodiment relates to uplink data transmission between a network device and a terminal device.
  • the specific process of data transmission. As shown in Figure 9, the method may include:
  • S201 refer to the description of S101 in FIG. 2.
  • S202 refer to the description of S102 in FIG. 2.
  • S203a When the first indication information satisfies the sixth condition, the terminal device sends a random access preamble sequence and third uplink data to the network device, and the terminal device receives feedback information from the network device on the third uplink data.
  • the method can also be described as operation 6: when the first indication information satisfies the sixth condition, the network device indicates situation 6 to the terminal device.
  • Case 6 can be described as: the terminal device sends the random access preamble sequence and the third uplink data to the network device, and the terminal device receives the feedback information of the network device on the third uplink data.
  • case 6 can also be described as: the terminal device uses the two-step access method for random access, or case 6 can also be described as: the terminal device uses 2-step RACH or two-step RACH for random access, The embodiment of the application does not limit this.
  • case 6 refer to S103a for the manner in which the terminal device determines the random access preamble sequence, which will not be repeated here.
  • the third uplink data is different from the first uplink data and the second uplink data.
  • the first uplink data is data obtained after the terminal device performs channel coding and rate matching on the first bit sequence
  • the third uplink data is data and RRC obtained after the terminal device performs channel coding and rate matching on the first bit sequence. information.
  • the channel coding mode of the third uplink data and the channel coding mode of the first uplink data may be the same or different.
  • the RRC message may include one or more of an RRC establishment request, an RRC recovery request, an authorization-free resource request, an identification of the terminal device, and a buffer status report (buffer status report, BSR).
  • the third uplink data may be sent through the third PUSCH.
  • the random access preamble and the third uplink data in S203a may be referred to as message A together.
  • the feedback information of the third uplink data may be referred to as message B.
  • S203a further includes at least one of the following operations:
  • Operation 3 See the description in S103a;
  • Operation 4 See the description in S103a;
  • Operation 5 See the description in S103a; and,
  • Case 7 When the first indication information satisfies the seventh condition, the network device indicates situation 7 to the terminal device.
  • Case 7 can be described as: the terminal device sends a random access preamble sequence (message 1) to the network device; the terminal device receives a random access response from the network device (message 2), the random access response indicates the first uplink time-frequency resource
  • the terminal device sends the fourth uplink data on the first uplink time-frequency resource (message 3); the terminal device receives the feedback information of the network device on the fourth uplink data (message 4).
  • case 7 can also be described as: the terminal device uses the four-step access method for random access, or case 7 can also be described as: the terminal device uses 4-step RACH or four-step RACH for random access, The embodiment of the application does not limit this.
  • the fourth uplink data is different from the first uplink data and the second uplink data.
  • the fourth uplink data is data and an RRC message obtained after the terminal device performs channel coding and rate matching on the first bit sequence.
  • the channel coding mode of the fourth uplink data and the channel coding mode of the first uplink data may be the same or different.
  • the RRC message may include one or more of the RRC establishment request, the RRC recovery request, the authorization-free resource request, the identification of the terminal device, and the BSR.
  • S203a may only include operation 6.
  • the network device when the first indication information satisfies the sixth condition, the network device indicates situation 6 to the terminal device.
  • the terminal device When the terminal device does not receive the first indication information; or, when the terminal device does not receive the first indication information within the time unit n+k, the terminal device considers that the first uplink data is correctly received by the network device.
  • n is the number of the time unit for the terminal device to send the first uplink data to the network device
  • n, k are non-negative integers
  • the time unit can be a time slot, sub-slot, mini-slot, or sub-frame.
  • S203a also includes at least one of operation 3, operation 4, operation 5, and operation 7.
  • S203a also includes operation 3, operation 4, operation 5, and operation 7.
  • FIG. 10 is an example of these 16 possible implementation methods.
  • the network device can indicate a situation to the terminal device from the N candidate situations through the first indication information. For specific instructions, refer to S103a in FIG. 2. It is only necessary to replace operation 1 in S103a with operation 6, and operation 2 with operation 7, which will not be repeated here.
  • the network device when the first indication information satisfies the sixth condition, the network device receives the random access preamble sequence and the third uplink data from the terminal device, and the network device sends feedback information on the third uplink data to the terminal device.
  • the network device receives the random access preamble sequence from the terminal device; the network device sends a random access response to the terminal device, and the random access response indicates the first uplink time.
  • the network device receives the fourth uplink data from the terminal device on the first uplink time-frequency resource; the network device sends feedback information of the fourth uplink data to the terminal device.
  • the random access response sent by the network device further includes a TA, which is estimated by the network device according to the random access preamble sequence sent by the terminal device, and the terminal device uses the TA to perform uplink synchronization with the network device.
  • operation 6 may further include: when the network device does not correctly receive the third uplink data, the network device indicates one of the W situations for the terminal device.
  • W is a positive integer
  • the W cases may include but are not limited to one or more of Case 3, Case 4, Case 5, Case 6, and Case 7.
  • the network device may use the first indication information to instruct the terminal device to use but not limited to the method described in any one of the W situations to perform retransmission until the network device correctly receives or the number of retransmissions by the terminal device is greater than the threshold.
  • the threshold value is preset by the protocol or configured by the network device to the terminal device through high-level signaling.
  • the threshold value is a positive integer, for example, 3 times.
  • the terminal device After the terminal device receives the feedback information of the third uplink data, the terminal device returns to steps S202 and S203a until the network device receives it correctly or the number of retransmissions by the terminal device is greater than the threshold (as shown by the dotted line in Figure 10). Shows).
  • the W cases include one or more of the aforementioned N cases.
  • the network device may also instruct the terminal device to use but not limited to the method described in any one of the W cases through the feedback information of the third uplink data to perform retransmission. At this time, the terminal device receives the third uplink data
  • the feedback information is equivalent to that the terminal device receives the first indication information.
  • the W cases may also include: the above
  • the feedback information of the third uplink data may be a random access response.
  • the network device indicates the time-frequency resource to the terminal device through the random access response, and the terminal device sends uplink data to the network device on the time-frequency resource.
  • the uplink data may be The above-mentioned third uplink data or retransmission data of the first uplink data.
  • operation 7 may further include: when the network device does not correctly receive the fourth uplink data, the network device indicates one of the W situations for the terminal device.
  • the W situations are similar to the above W situations when the first indication information satisfies the sixth condition, and will not be repeated here.
  • the network device can use the first indication information to instruct the terminal device to use but not limited to the method described in any of the W situations to perform retransmission, until the network device receives correctly or the number of retransmissions by the terminal device is greater than the threshold, where For the threshold value, refer to the above description when the first indication information satisfies the sixth condition.
  • the terminal device After the terminal device receives the feedback information of the fourth uplink data, the terminal device returns to steps S202 and S203a until the network device receives it correctly or the number of retransmissions by the terminal device is greater than the threshold (as indicated by the dashed line in Figure 11). Shows).
  • the network device may also instruct the terminal device to use but not limited to the method described in any one of the W cases through the feedback information of the fourth uplink data to perform retransmission. At this time, the terminal device receives the fourth uplink data.
  • the feedback information is equivalent to that the terminal device receives the first indication information.
  • step S203a can be replaced by the following step S203b.
  • the terminal device When the first indication information satisfies the seventh condition, the terminal device sends a random access preamble sequence to the network device; the terminal device receives a random access response from the network device, and the random access response indicates the first uplink time-frequency resource; The terminal device sends the fourth uplink data on the first uplink time-frequency resource; the terminal device receives the feedback information of the network device on the fourth uplink data.
  • the method can also be described as operation 7: when the first indication information satisfies the seventh condition, the network device indicates situation 7 to the terminal device. For the description of case 7, refer to S203a.
  • S203b may only include operation 7.
  • the network device instructs operation 7.
  • the terminal device does not receive the first indication information; or, when the terminal device does not receive the first indication information within the time unit n+k, the terminal device considers that the first uplink data is correctly received by the network device.
  • n is the number of the time unit for the terminal device to send the first uplink data to the network device
  • n, k are non-negative integers
  • the time unit can be a time slot, sub-slot, mini-slot, or sub-frame.
  • S203b also includes at least one of operation 3, operation 4, operation 5, and operation 6 in S203a: S203b also includes operation 3, operation 4, and operation 4 in S203a. One, two, three or four of operation 5 and operation 6.
  • Figure 11 is an example of these 16 possible implementation methods.
  • the network device can indicate a situation to the terminal device from among the N candidate situations through the first indication information.
  • the descriptions of operation 3, operation 4, operation 5, operation 6 and operation 7 in S203a are also applicable to S203b.
  • the third, fourth, fifth, sixth, and seventh conditions are also applicable. The description of the conditions also applies to S203b.
  • the foregoing embodiment provides a method for uplink data transmission.
  • the network device When the network device does not correctly receive the first uplink data from the terminal device, the network device instructs the terminal device to perform the uplink transmission mode through the first indication information.
  • the network device instructs the terminal device to use the two-step access method or the four-step access method to perform random access through the first indication information, thereby interacting with the network
  • the device performs upstream transmission.
  • the network device can determine the TA according to the random access preamble sequence sent by the terminal device; at the same time, the terminal device will carry the third uplink data during the random access process, and the third uplink data carried here is compared with the first uplink data.
  • the network device instructs the terminal device to send the retransmission data of the first uplink data through the first indication information without initiating random access, thereby avoiding waste of resources.
  • the network device can flexibly instruct the terminal device to retransmit the manner according to the actual situation.
  • the network device determines whether the uplink is out of synchronization, and instructs the terminal device to perform data transmission, avoiding the terminal device from independently selecting the data transmission method, thereby avoiding the inaccurate estimation of the TA by the terminal device.
  • the impact of this has improved the reliability of data transmission; at the same time, in the above-mentioned manner, network equipment does not need to reserve unlicensed resources and random access resources for retransmissions for terminal equipment, which improves spectrum efficiency.
  • the terminal device when the terminal device is in the RRC_INACTIVE state as an example, the uplink transmission method between the terminal device and the network device is described.
  • the network device can use the RRC release process, such as sending an RRC release (RRCRelease) message to the terminal device, so that the state of the terminal device changes from the RRC_CONNECTED state to the RRC_INACTIVE state.
  • the terminal device In the RRC_INACTIVE state, the terminal device can Use the method described in the foregoing embodiment to perform uplink data transmission with the network device.
  • the network device and the terminal device include hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware, software, or a combination of hardware and software. Whether a certain function is executed by hardware, software, or computer software-driven hardware depends on the specific application scenarios and design constraints of the technical solution.
  • FIG. 12 is a schematic structural diagram of a possible communication device provided by an embodiment of the application.
  • the apparatus 1200 may be a terminal device, which can implement the terminal device-side method in the method embodiment shown in FIG. 2 or FIG. 9; the apparatus 1200 may also be a device that can support the terminal device to implement the method.
  • the apparatus 1200 can be installed in a terminal device or used in conjunction with the terminal device.
  • the apparatus 1200 may be a network device, which can implement the network device-side method in the method embodiment shown in FIG. 2 or FIG. 9; the apparatus 1200 may also be a device that can support the network device to implement the method.
  • the apparatus 1200 can be installed in a network device or used in conjunction with a network device.
  • the apparatus 1200 may be a hardware structure, a software module, or a hardware structure plus a software module.
  • the device 1200 can be implemented by a chip system. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device 1200 includes a processing module 1210 and a communication module 1220.
  • the processing module 1210 can generate a signal to be sent, and can use the communication module 1220 to send the signal.
  • the processing module 1210 may use the communication module 1220 to receive signals and process the received signals.
  • the processing module 1210 and the communication module 1220 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the coupling can be a wired connection or a wireless connection.
  • the communication module may be a circuit, a module, a bus, an interface, a transceiver, a pin, or other device that can implement a transceiver function, and the embodiment of the present application does not limit it.
  • FIG. 13 is a schematic structural diagram of a possible communication device provided by an embodiment of the application.
  • the device 1300 may be a terminal device, which can implement the terminal device-side method provided in the embodiments of the present application; the device 1300 may also be a device that can support the terminal device to implement the method, such as a chip system, and the device 1300 can Installed in terminal equipment or matched with terminal equipment.
  • the device 1300 may be a network device, which can implement the network-side method provided in the embodiments of the present application; the device 1300 may also be a device that can support the network device to implement the method, such as a chip system, and the device 1300 may Installed in network equipment or matched with network equipment.
  • the communication device 1300 includes a processor 1310 and an interface circuit 1320.
  • the processor 1310 and the interface circuit 1320 are coupled with each other.
  • the interface circuit 1320 may be a transceiver or an input/output interface.
  • the communication device 1300 may further include a memory 1330 for storing instructions that can be executed by the processor 1310, storing input data required by the processor 1310 to run the instructions, and/or storing data generated after the processor 1310 runs the instructions.
  • the processor 1310 is used to perform the function of the above-mentioned processing module 1210
  • the interface circuit 1320 is used to perform the function of the above-mentioned communication module 1220.
  • the terminal device chip When the foregoing communication device is a chip applied to a terminal device, the terminal device chip implements the function of the terminal device in the foregoing method embodiment.
  • the terminal device chip receives information from other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal device; or, the terminal device chip sends information to other modules in the terminal device (such as a radio frequency module or antenna).
  • the antenna sends information, which is sent by the terminal device to the network device.
  • the network device chip implements the function of the network device in the foregoing method embodiment.
  • the network device chip receives information from other modules in the network device (such as radio frequency modules or antennas), and the information is sent by the terminal device to the network device; or, the network device chip sends information to other modules in the network device (such as radio frequency modules or antennas).
  • the antenna sends information, which is sent by the network device to the terminal device.
  • the processor in the embodiments of the present application may be a central processing unit (Central Processing Unit, CPU), or other general-purpose processors, digital signal processors (Digital Signal Processors, DSPs), and application specific integrated circuits. (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the processor may be random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable Except programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art middle.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC can be located in a network device or a terminal device.
  • the processor and the storage medium may also exist as discrete components in the network device or the terminal device.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal device, or other programmable devices.
  • the computer program or instruction may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server integrating one or more available media.
  • the usable medium may be a magnetic medium, such as a floppy disk, a hard disk, and a magnetic tape; it may also be an optical medium, such as a DVD; it may also be a semiconductor medium, such as a solid state disk (SSD).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Sont concernés dans des modes de réalisation de la présente demande un procédé et un appareil de transmission de données de liaison montante. Le procédé fait appel à l'étape suivante : lorsqu'un dispositif de réseau n'a pas correctement reçu de premières données de liaison montante envoyées par un dispositif terminal sur une ressource d'autorisation de configuration, le dispositif de réseau indique de manière flexible, au moyen de premières informations d'indication, le moyen de retransmission par le dispositif terminal. Au moyen dudit procédé, à la fois la fiabilité de retransmission de données et l'efficacité spectrale sont améliorées.
PCT/CN2020/072208 2020-01-15 2020-01-15 Procédé et appareil de transmission de données de liaison montante WO2021142652A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2020/072208 WO2021142652A1 (fr) 2020-01-15 2020-01-15 Procédé et appareil de transmission de données de liaison montante
CN202080089210.6A CN114846898A (zh) 2020-01-15 2020-01-15 上行数据传输的方法和装置

Applications Claiming Priority (1)

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PCT/CN2020/072208 WO2021142652A1 (fr) 2020-01-15 2020-01-15 Procédé et appareil de transmission de données de liaison montante

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019062779A1 (fr) * 2017-09-27 2019-04-04 华为技术有限公司 Procédé de radiomessagerie, procédé de synchronisation de communication et appareils
CN110351878A (zh) * 2018-04-04 2019-10-18 华为技术有限公司 一种随机接入处理方法和相关设备
CN110351736A (zh) * 2018-04-04 2019-10-18 北京展讯高科通信技术有限公司 按需系统消息请求确认的传输方法及装置、存储介质、基站、终端

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019062779A1 (fr) * 2017-09-27 2019-04-04 华为技术有限公司 Procédé de radiomessagerie, procédé de synchronisation de communication et appareils
CN110351878A (zh) * 2018-04-04 2019-10-18 华为技术有限公司 一种随机接入处理方法和相关设备
CN110351736A (zh) * 2018-04-04 2019-10-18 北京展讯高科通信技术有限公司 按需系统消息请求确认的传输方法及装置、存储介质、基站、终端

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