WO2021056583A1 - Procédé et appareil de transmission en liaison montante - Google Patents

Procédé et appareil de transmission en liaison montante Download PDF

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Publication number
WO2021056583A1
WO2021056583A1 PCT/CN2019/109232 CN2019109232W WO2021056583A1 WO 2021056583 A1 WO2021056583 A1 WO 2021056583A1 CN 2019109232 W CN2019109232 W CN 2019109232W WO 2021056583 A1 WO2021056583 A1 WO 2021056583A1
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Prior art keywords
carrier
information
feedback
network device
terminal device
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PCT/CN2019/109232
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English (en)
Chinese (zh)
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WO2021056583A9 (fr
Inventor
贾琼
张佳胤
范巍巍
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华为技术有限公司
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Priority to CN201980100421.2A priority Critical patent/CN114424643A/zh
Priority to PCT/CN2019/109232 priority patent/WO2021056583A1/fr
Publication of WO2021056583A1 publication Critical patent/WO2021056583A1/fr
Publication of WO2021056583A9 publication Critical patent/WO2021056583A9/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • This application relates to the field of wireless network technology, and in particular to an uplink transmission method and device.
  • the 3rd generation partnership project (3GPP) introduced licensed spectrum assisted access (license assisted access, LAA) and enhanced licensed spectrum assisted access in release 13 (release 13, R13) and release R14, respectively (enhanced LAA, eLAA) technology, that is, non-standalone deployment of Long Term Evolution (LTE)/Long Term Evolution (LTE-Advanced, LTE-A) LTE systems on unlicensed spectrum, Maximize the use of unlicensed spectrum resources with the assistance of licensed spectrum.
  • LTE Long Term Evolution
  • LTE-Advanced, LTE-A Long Term Evolution-Advanced
  • the embodiments of the application provide an uplink transmission method and device, which can be applied to communication systems, such as vehicle-to-everything (V2X), LTE vehicle-to-vehicle communication (LTE-Vehicle, LTE-V), and machine type Communication (machine type communication, MTC), machine to machine network (machine to machine, M2M), Internet of things (IoT), LTE machine to machine network (LTE-machine to machine, LTE-M) can improve Uplink communication capacity.
  • V2X vehicle-to-everything
  • LTE-Vehicle communication LTE-Vehicle, LTE-V
  • machine type Communication machine type communication
  • MTC machine to machine network
  • IoT Internet of things
  • LTE machine to machine network LTE-machine to machine, LTE-M
  • the first scheduling information and the second scheduling information include time indication information of the scheduling indication information.
  • Two scheduling messages are used to coordinately indicate the uplink transmission time, thereby reducing data transmission delay.
  • At least one of the first carrier and the second carrier is on an unlicensed spectrum. Since the unlicensed spectrum can be configured with a larger bandwidth, the uplink communication capacity can be further improved by sending uplink data on the unlicensed spectrum.
  • the transmission time of the uplink data is within the channel occupation time COT obtained by the network device by listening first and then sending the LBT, so as to ensure that the uplink data can be sent in time.
  • the terminal device when the second carrier is on the unlicensed spectrum, the terminal device sends uplink data to the network device after performing LBT.
  • LBT is performed to ensure that the channel of the second carrier is in an idle state, thereby improving the success rate of data transmission.
  • the terminal device determines the transmission time of the uplink data according to at least one of the first scheduling information and the second scheduling information; determines the transmission of the uplink data The time interval between the time and the receiving time of the second scheduling information; when the time interval is less than or equal to the preset threshold, the terminal device sends uplink data; when the time interval is greater than the preset threshold, the terminal device sends uplink data after performing LBT. So as to ensure the success rate of data transmission.
  • the uplink data of the first uplink time unit on the second carrier is adjusted to the second uplink time unit on the first carrier , Where the time domain position of the first uplink time unit corresponds to the time domain position of the second uplink time unit. Avoid interference of data transmission on the second carrier, and improve the success rate of data transmission.
  • the network device first sends the first scheduling information on the first carrier, and then sends the second scheduling information to the terminal device on the second carrier. After the terminal device receives the second scheduling information, it can determine Data transmission time, and then send uplink data according to the determined transmission time. By first sending the first scheduling information, the terminal device can accurately data in advance, and then sending the second scheduling information to trigger the terminal device to send uplink data, which can effectively reduce the data transmission delay.
  • an embodiment of the present application provides an uplink transmission method, including: a network device sends first scheduling information to a terminal device on a first carrier, and the network device sends second scheduling information to a terminal device on a second carrier; Among them, the first scheduling information and the second scheduling information are a subset of the scheduling indication information, and the scheduling indication information is used to indicate information required by the terminal device to send uplink data; to receive the uplink data sent by the terminal device on the second carrier.
  • the two-step cross-carrier scheduling is used to instruct the uplink transmission on the second carrier, which effectively improves the uplink communication capacity.
  • the first scheduling information and the second scheduling information include time indication information of the scheduling indication information.
  • Two scheduling messages are used to coordinately indicate the uplink transmission time, thereby reducing data transmission delay.
  • At least one of the first carrier and the second carrier is on an unlicensed spectrum. Since the unlicensed spectrum can be configured with a larger bandwidth, the uplink communication capacity can be further improved by sending uplink data on the unlicensed spectrum.
  • the transmission time of the uplink data is within the channel occupation time COT obtained by the network device by listening first and then sending the LBT, so as to ensure that the uplink transmission can be sent in time.
  • the network device when the first carrier is on the unlicensed spectrum, the network device sends the first scheduling information to the terminal device after performing LBT on the first carrier. LBT is performed to ensure that the channel of the first carrier is in an idle state, thereby improving the success rate of scheduling information transmission.
  • the network device when the second carrier is on the unlicensed spectrum, the network device sends the second scheduling information to the terminal device after performing LBT on the second carrier. LBT is performed to ensure that the channel of the second carrier is in an idle state, thereby improving the success rate of scheduling information transmission.
  • the uplink data of the first uplink time unit on the second carrier is adjusted to the second uplink time unit on the first carrier , Where the time domain position of the first uplink time unit corresponds to the time domain position of the second uplink time unit. Avoid interference of data transmission on the second carrier, and improve the success rate of data transmission.
  • an embodiment of the present application provides an uplink transmission method, including: a terminal device receives data sent by a network device on a first carrier; selecting at least one carrier from the first carrier and the second carrier; Send feedback information to the network device on one carrier, and the feedback information is used to indicate data reception; wherein, at least one of the first carrier and the second carrier is on the licensed spectrum.
  • the terminal device sends feedback information to the network device on the first carrier and the second carrier.
  • the feedback information is transmitted together through the first carrier and the second carrier to improve the capacity of uplink communication.
  • the terminal device performs monitoring on at least one carrier before sending the LBT and then sending feedback information to the network device.
  • the implementation of LBT ensures that the unlicensed spectrum is in an idle state, thereby improving the success rate of feedback information transmission.
  • the terminal device receives the scheduling information sent by the network device.
  • the scheduling information includes first indication information and second indication information.
  • the first indication information is used to indicate the feedback resource on the first carrier
  • the second indication is The information is used to indicate the feedback resources on the second carrier.
  • the feedback resource is indicated by the scheduling information to avoid the collision of the feedback resource and improve the success rate of the feedback information transmission.
  • At least one carrier includes at least one feedback resource; the terminal device selects the feedback resource closest to the data receiving time from the at least one feedback resource to send feedback information to the network device. Can effectively reduce the data transmission delay.
  • At least one carrier includes the feedback resource on the first carrier and the feedback resource on the second carrier; when the feedback resource on the first carrier and the feedback resource on the second carrier are in the time domain
  • the terminal device selects at least one feedback resource from the overlapped feedback resources to send feedback information to the network device.
  • the first indication information adopts a display indication mode or an implicit indication mode
  • the second indication information adopts a display indication mode or an implicit indication mode
  • the first indication information and the second indication information are the same indication information.
  • the signaling overhead can be reduced.
  • the first indication information and the second indication information are indicated by at least one of radio resource control RRC and downlink control information DCI.
  • an embodiment of the present application provides an uplink transmission method, including: a network device sends data to a terminal device on a first carrier; and receiving feedback information sent by the terminal device on at least one carrier, at least one carrier is the terminal device Selected from the first carrier and the second carrier; wherein at least one of the first carrier and the second carrier is on the licensed spectrum.
  • the network device receives the feedback information sent by the terminal device on the first carrier and the second carrier.
  • the feedback information is transmitted together through the first carrier and the second carrier to improve the uplink capacity.
  • the network device receives the feedback information sent after the terminal device performs monitoring on at least one carrier and then sends the LBT.
  • the implementation of LBT ensures that the unlicensed spectrum is in an idle state and improves the success rate of feedback information transmission.
  • the terminal device sends scheduling information to the network device.
  • the scheduling information includes first indication information and second indication information.
  • the first indication information is used to indicate the feedback resource on the first carrier
  • the second indication information is Used to indicate the feedback resources on the second carrier.
  • the feedback resources are indicated by scheduling information to avoid collisions of feedback resources and improve the success rate of feedback information transmission.
  • At least one carrier includes at least one feedback resource; the network device receives the feedback information sent by the feedback resource selected by the terminal device from the at least one feedback resource, which is the closest to the data receiving time. Can effectively reduce the data transmission delay.
  • the embodiments of the present application provide an uplink transmission device, which is configured to implement the methods and functions performed by the terminal equipment in the first aspect and the third aspect, and is implemented by hardware/software, and its hardware/software Including modules corresponding to the above-mentioned functions.
  • the embodiments of the present application provide another uplink transmission device, which is configured to implement the methods and functions performed by the network equipment in the second and fourth aspects described above, and is implemented by hardware/software.
  • the software includes modules corresponding to the above-mentioned functions.
  • an embodiment of the present application provides a communication device including a processor and a memory; the memory is used to store computer-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, so that all The communication device executes the methods and functions executed by the terminal equipment in the first aspect and the third aspect described above.
  • an embodiment of the present application provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to Perform the methods and functions performed by the terminal device in the first aspect and the third aspect described above.
  • an embodiment of the present application provides a communication device including a processor and a memory; the memory is used to store computer-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, so that all The communication device executes the methods and functions executed by the network equipment in the second aspect and the fourth aspect.
  • an embodiment of the present application provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to Perform the methods and functions performed by the network device in the second aspect and the fourth aspect described above.
  • an embodiment of the present application provides a readable storage medium for storing instructions. When the instructions are executed, the method described in any one of the first aspect and the third aspect is implemented.
  • the embodiments of the present application provide a readable storage medium for storing instructions, and when the instructions are executed, the method described in any one of the second aspect and the fourth aspect is implemented.
  • an embodiment of the present application provides a communication system, including the terminal device in any of the foregoing aspects and the network device in any aspect.
  • FIG. 1 is a schematic diagram of the architecture of a communication system 100 provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of a carrier operating mode provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of an uplink transmission method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of sending uplink data according to an embodiment of an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of an uplink transmission method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a feedback resource provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an uplink transmission apparatus according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another uplink transmission apparatus according to an embodiment of an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a terminal device proposed in an embodiment of the present application.
  • Fig. 10 is a schematic structural diagram of a network device proposed in an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a communication system 100 provided by an embodiment of the present application.
  • the communication system 100 may be a fifth-generation mobile communication technology (5-Generation, 5G) new radio access technology (NR) system, or other communication systems.
  • the communication system 100 may include a network device 110 and a terminal device 101 to a terminal device 106.
  • the network device or terminal device can be hardware, software that is functionally divided, or a combination of the two.
  • the network device and the terminal device can communicate with other devices or network elements.
  • the network device 110 can send downlink data to the terminal device 101 to the terminal device 106.
  • the terminal device 101 to the terminal device 106 may also send uplink data to the network device 110.
  • the terminal equipment 101 to the terminal equipment 106 may be user equipment (UE), cell phones, smart phones, portable computers, handheld communication equipment, handheld computing equipment, satellite radio devices, global positioning systems, and personal computers (personal computers). digital assistant (PDA) and/or any other suitable devices for communicating on the wireless communication system 100, etc.
  • UE user equipment
  • PDA digital assistant
  • the network device 110 may be a base station, an access point, a Node B, an environment bureau (eNB), or a 5G base station (next generation base station, gNB), which refers to a wireless terminal through one or more sectors on the air interface Devices in the access network that communicate.
  • the network device 110 can act as a router between the wireless terminal and the rest of the access network, and the access network can include an Internet Protocol network.
  • the network device 110 may also coordinate the management of the attributes of the air interface.
  • the communication system 100 may adopt a public land mobile network (PLMN), a device-to-device (D2D) network, a machine-to-machine (M2M) network, and the Internet of things (Internet of things). , IoT) or other networks.
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • IoT Internet of things
  • the terminal device 104 to the terminal device 106 may also form a communication system
  • LBT Listen before sending or listening before talk
  • Common LBTs are as follows: (1) Cat 1 LBT: LBT is not executed; (2) Cat 2 LBT: Non-random back-off LBT method; (3) Cat 4 LBT: Random back-off LBT method.
  • FIG. 2 is a schematic diagram of a carrier operating mode provided by an embodiment of the present application.
  • the NR system can work in unpaired spectrum, corresponding to time division duplex (TDD), that is, by performing downlink (DL) and uplink (UL) transmissions at different times , A duplex mode that realizes the interaction between network equipment and terminal equipment.
  • TDD time division duplex
  • DL downlink
  • UL uplink
  • FDD frequency division duplex
  • the duplex mode of interaction between devices can also be configured with a supplementary uplink (SUL) carrier.
  • SUL supplementary uplink
  • one NR cell includes one TDD carrier and one SUL carrier.
  • the transmission direction in the TDD carrier It can be uplink, downlink, or reserved, but the transmission direction of the SUL carrier cannot be downlink, and may be uplink or reserved.
  • FIG. 3 is a schematic flowchart of an uplink transmission method provided by an embodiment of the present application.
  • the steps in the embodiment of this application at least include:
  • the network device sends first scheduling information to the terminal device on the first carrier, and sends second scheduling information to the terminal device on the second carrier.
  • the first scheduling information and the second scheduling information are a subset of scheduling indication information, and the scheduling indication information is used to indicate information required by the terminal device to send uplink data.
  • the order in which the network device sends the first scheduling information and the second scheduling information is not limited to the order described in step 301. That is, the network device can send the first scheduling information on the first carrier, and the terminal device performs data preparation after receiving the first scheduling information, and then the network device can send the second scheduling information to the terminal device on the second carrier, and the terminal device receives After the second scheduling information, the data transmission time can be determined, and then the uplink data is transmitted according to the determined transmission time.
  • the network device may also send the first scheduling information to the terminal device on the first carrier and the second scheduling information to the terminal device on the second carrier at the same time.
  • the network device may first send the second scheduling information, and the terminal device may prepare data after receiving the second scheduling information. The network device may then send the first scheduling information to the terminal device. After the terminal device receives the first scheduling information, it may Determine the data transmission time, and then send the uplink data according to the determined transmission time.
  • the first scheduling information may be part of the above-mentioned scheduling indication information, and the second scheduling information may also be part of the above-mentioned scheduling indication information.
  • the first scheduling information may be combined with the second scheduling information.
  • the information is the same or different.
  • the first scheduling information may be the indication information of the part of the above scheduling indication information
  • the second scheduling information may be the remaining indication information in the above scheduling indication information
  • the first scheduling information and the second scheduling information can constitute complete scheduling indication information.
  • the first scheduling information and the second scheduling information include at least one indication information in the scheduling indication information at the same time, that is, the first scheduling information and the second scheduling information have an intersection of at least one indication information in the scheduling indication information.
  • the terminal device sends the uplink data to the network device on the second carrier according to the first scheduling information and the second scheduling information.
  • the uplink data may include physical uplink shared channel (PUSCH) data, physical uplink control channel (PUCCH) data, and so on.
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the network device when the first carrier is on the unlicensed spectrum, before the network device sends the first scheduling information on the first carrier, it needs to perform LBT or clear channel assessment (clear channel assessment, CCA) for channel sensing in order to obtain Channel occupancy time (COT), and then send the first scheduling information to the terminal device within the channel occupancy time.
  • LBT clear channel assessment
  • CCA clear channel assessment
  • the network device needs to perform LBT or CCA for channel sensing before sending the second scheduling information on the second carrier to obtain the channel occupancy time, and then check the channel occupancy time
  • the second scheduling information is sent internally to the terminal device.
  • the scheduling indication information may include scheduling information format (identifier for DCI format) indication information, carrier (carrier indicator) indication information, partial bandwidth indication information (bandwidth part indicator), frequency domain resource indication information (frequency domain resource assignment), and time Domain resource indication information (time domain resource assignment), frequency hopping indication information (frequency hopping flag), modulation and coding scheme indication information (modulation and coding scheme), new data indication information (new data indicator), redundancy version indication information (redundancy) version), hybrid autorepeat request (HARQ) indication information, HARQ codebook indication information (such as 1st downlink assignment index and/or 2nd downlink assignment index), power control (transmit power control, TPC) indication information (E.g.
  • scheduling information format identifier for DCI format
  • carrier carrier indicator
  • partial bandwidth indication information bandwidth part indicator
  • frequency domain resource indication information frequency domain resource assignment
  • time Domain resource indication information time domain resource assignment
  • frequency hopping indication information frequency hopping indication information (frequency hopping flag)
  • modulation and coding scheme indication information modulation and coding scheme
  • TPC command for scheduled PUSCH sounding reference signal indicator (sounding reference signal resource indicator, SRS resource indicator), precoding indicator information and layer indicator information (precoding information and number of layers), antenna port information (antenna ports) , Sounding reference signal transmission request indication information (SRS request), channel state information request indication information (channel state information request, CSI request), code block group transmission indication information (code block group transmission information, CBGTI), demodulation reference signal related Indication information (e.g. phase-tracking reference signals demodulation reference signal association, PTRS-DMRS association and/or DMRS sequence initialization), channel access mechanism indicator information (e.g.
  • the scheduling instruction information includes one or a combination of the foregoing instruction information.
  • the time domain resource indication information may include at least one of reference time information, absolute time information, time offset information, period information, and validity period;
  • the frequency domain resource indication information may include a reference frequency domain position, an absolute frequency domain At least one of location, frequency domain offset information, and frequency domain range.
  • the first scheduling information and the second scheduling information include time indication information of the scheduling indication information.
  • the terminal device may confirm the specific uplink transmission time according to the time indication information in the first scheduling information and the time indication information in the second scheduling information. For example, if the terminal device receives the first scheduling information in the nth time slot, n is an integer greater than or equal to 0, and the first scheduling information indicates that the first time offset is offset1 time slot, and the second scheduling information indicates that The second time offset is offset2 time slots, where offset1 and offset2 are both integers greater than or equal to 0, and the time slot for the terminal device to send uplink data is the (n+offset1+offset2)th time slot.
  • the time point at which the terminal device sends uplink data is m+offset1, where both m and offset1 are greater than A number equal to 0.
  • the first scheduling information includes the first valid time and the first time offset offset1.
  • the first scheduling information may indicate a time point or a time slot.
  • the terminal device may determine the first valid time range [p, q] for sending the second scheduling information according to the first valid time in the first scheduling information, that is, the time point t for sending the second scheduling information should be located at the time point p and the time point between q. If the second scheduling information is received within the first valid time range, the time point at which the terminal device sends uplink data is t+offset1, where t, offset1, p, and q are all numbers greater than or equal to zero.
  • the terminal device may determine the first valid time range [p, q] for sending the second scheduling information according to the first valid time in the first scheduling information, that is, the time slot t for sending the second scheduling information should be located at the pth time. From the slot to the qth time slot, if the second scheduling information is received within the first valid time range, the time slot for the terminal device to send uplink data is the (t+offset1)th time slot.
  • t, offset1, p, and q are all integers greater than or equal to 0. It can be understood that the specific indication manner may also be other manners, which is not limited in this application.
  • FIG. 4 is a schematic diagram of sending uplink data according to an embodiment of the present application.
  • trigger A represents the first scheduling information received at the first time
  • trigger B represents the second scheduling information received at the second time
  • U represents an uplink time unit
  • D represents a downlink time unit
  • S represents a special time unit, which can be used for uplink and downlink switching.
  • the first scheduling information includes all indication information in the scheduling indication information except for the time domain indication information, and the time domain indication information is carried in the second scheduling information.
  • the terminal device may determine the time to send the uplink data according to the trigger B received at the second moment.
  • the end time point of receiving the trigger B may be determined as the sending time point of the uplink data. It can be understood that, at this time, the time domain resource indication information is implicitly indicated through the second scheduling information.
  • the instructions for the first scheduling information and the second scheduling information may include one or more of the following: downlink control information (DCI), uplink control information (UCI) for instructions, and side Line control information (sidelink control information, SCI) and radio resource control (radio resource control, RRC) signaling, etc.
  • DCI downlink control information
  • UCI uplink control information
  • SCI sidelink control information
  • RRC radio resource control
  • the terminal device may determine to perform uplink transmission on the second carrier according to the first scheduling information and the second scheduling information. Before performing the uplink transmission, the terminal device needs to perform LBT .
  • LBT LBT
  • the transmission time of the uplink data is within the channel occupation time COT obtained by the network device by listening first and then sending the LBT.
  • the network equipment performs LBT in the third time unit and the fourth time unit, and the channel occupation time COT is the channel occupation time from the fifth time unit to the last time unit.
  • the terminal device can perform LBT from the fifth time unit to the last time unit.
  • a time unit sends uplink data to the network device.
  • the terminal device may determine the transmission time of the uplink data according to at least one of the first scheduling information and the second scheduling information; then Determine the time interval between the sending time of the uplink data and the receiving time of the second scheduling information, where the interval time may be 16us; when the time interval is less than or equal to the preset threshold, the terminal device may not need to perform LBT or perform Cat 1 LBT, directly sending the uplink data. When the time interval is greater than the preset threshold, the terminal device transmits the uplink data after performing LBT.
  • the transmission time of the uplink data can be a time period, a start time point or an end time point, or a certain time point within the time period.
  • the receiving time of the second scheduling information may be a time period, a start time point or an end time point, or a certain time point within the time period.
  • the time interval may be the difference between the start time point of sending uplink data and the end time point of receiving the second scheduling information, and the time interval may also be the start time point of sending uplink data and the time point of receiving the second scheduling information. The difference between the starting time points.
  • the time interval can also be other values, which will not be repeated here.
  • the uplink data of the first uplink time unit on the second carrier is adjusted to the second The uplink time unit, wherein the time domain position of the first uplink time unit corresponds to the time domain position of the second uplink time unit.
  • the terminal device sends uplink data from the fifth uplink time unit to the 14th uplink time unit on the second carrier, because the ninth time unit, the 13th time unit and the first carrier on the first carrier transmit uplink data.
  • the 14 time units are uplink time units.
  • the terminal device can adjust the data of the 9th time unit, the 13th time unit and the 14th time unit on the second carrier to the 9th time unit on the first carrier.
  • the 13th time unit and the 14th time unit are uplink time units.
  • time unit involved in this application can be a symbol, a slot, a mini-slot, a subframe, and a transmission time interval (TTI). It can also be seconds (s), milliseconds (ms), microseconds (us), and so on.
  • the frequency domain units involved in this application may be subcarriers, resource elements (resource elements, RE), resource blocks (resource blocks, RB), etc., and may also be hertz (Hz).
  • first carrier and the second carrier in the embodiment of the present application are used for logical distinction and do not constitute a quantitative limitation, and may include one or more first carriers, or may include one or more second carriers.
  • the second carrier can be configured with a larger bandwidth (for example, not only the 2.1GHz band bandwidth can be configured, but also other unlicensed spectrum bandwidths), it is indicated in the second carrier by means of two-step scheduling across carriers.
  • Uplink transmission on the carrier can effectively increase the uplink capacity.
  • the terminal device can begin to prepare data, and then after receiving the second scheduling information, the uplink data transmission time can be determined, and then the uplink transmission can be performed according to the determined transmission time, which can reduce data Transmission delay.
  • FIG. 5 is a schematic flowchart of an uplink transmission method provided by an embodiment of the present application.
  • the steps in the embodiment of this application at least include:
  • S501 The network device sends data to the terminal device on the first carrier, and the terminal device receives the data sent by the network device on the first carrier.
  • the terminal device selects at least one carrier from the first carrier and the second carrier.
  • the terminal device sends feedback information to the network device on the at least one carrier, and the network device receives the feedback information sent by the terminal device on the at least one carrier.
  • the feedback information is used to indicate the receiving status of the data; wherein at least one of the first carrier and the second carrier is on a licensed spectrum.
  • the terminal device After the terminal device receives the data, it determines the data reception situation, for example, when the data is received correctly, it feeds back A (ACK), otherwise it feeds back N (NACK), and then selects from the first carrier and the second carrier At least one carrier to send feedback information.
  • the terminal device can select the first carrier and send feedback information to the network device on the first carrier.
  • the terminal device may also select the second carrier and send feedback information to the network device on the second carrier.
  • the terminal device may also select the first carrier and the second carrier, and send feedback information to the terminal device on the first carrier and the second carrier.
  • the feedback information on the first carrier may be exactly the same as the feedback information on the second carrier, or the feedback information on the first carrier is part of the feedback information that needs to be sent, and the feedback information on the second carrier The information is the remaining feedback information among all the feedback information that needs to be sent.
  • the feedback information may be HARQ information.
  • the first carrier may be on the licensed spectrum
  • the second carrier may be on the licensed spectrum
  • both the first carrier and the second carrier are on the licensed spectrum.
  • the terminal device can select a carrier on a licensed spectrum, or at least two carriers on a licensed spectrum, and can also choose a carrier on a licensed spectrum and a carrier on an unlicensed spectrum. The application is not limited to this.
  • the terminal device may send feedback information to the network device after performing LBT on the at least one carrier.
  • the terminal device needs to perform LBT on the first carrier before sending feedback information to the network device on the first carrier, and send feedback information to the network device after performing LBT.
  • the terminal device needs to perform LBT on the second carrier before sending feedback information to the network device on the second carrier, and send feedback information to the network device after performing LBT.
  • the network device may send scheduling information to the terminal device, and the terminal device may receive the scheduling information sent by the network device, where the scheduling information includes first indication information and second indication information, and the first indication information is used for Indicating the feedback resource on the first carrier, and the second indication information is used to indicate the feedback resource on the second carrier.
  • the scheduling information may include at least one of downlink control information DCI, side line control information SCI, or radio resource control RRC signaling.
  • the first indication information and the second indication information may be carried in the same scheduling information, for example, in the same DCI or the same SCI.
  • the first indication information and the second indication information may also be carried in different scheduling information, for example, the first indication information is carried in the DCI, and the second indication information is carried in the SCI.
  • the first indication information and the second indication information may include one or more of the following indication information: indication information of the time between data and feedback, indication information of feedback resources, indication information for confirming the feedback codebook, and so on.
  • the time indication information between data and feedback can be realized by indicating the time offset information between the sent data and the corresponding feedback information (HARQ information), for example, it can be done through PDSCH-to-HARQ_feedback timing indicator Instructions.
  • the indication information of the feedback resource can be realized by indicating the resource (such as PUCCH) used to carry the feedback information, for example, by indicating the PUCCH resource indicator (PUCCH resource indicator).
  • the indication information for confirming the feedback codebook can be realized by indicating the size of the HARQ codebook, for example, by indicating the downlink assignment index (DAI).
  • DAI downlink assignment index
  • the first indication information and the second indication information are the same indication information, or the first indication information and the second indication information are different indication information.
  • the scheduling information contains the time indication information between two independent data and feedback
  • the first indication information is the time indication information between one piece of data in the scheduling information and the feedback
  • the second indication information is the time indication information between one piece of data in the scheduling information and the feedback.
  • the time between the other data and the feedback indicates the information.
  • the scheduling information includes a piece of time indication information between data and feedback
  • the first indication information and the second indication information may share one piece of time indication information between data and feedback.
  • two domain values may be used to indicate the first indication information and the second indication information respectively.
  • two domain values can be used in DCI to indicate the PUCCH resource indicator (PUCCH resource indicator), where PUCCH resource indicator 1 represents the PUCCH resource location on the first carrier, and PUCCH resource indicator 2 represents the PUCCH resource on the second carrier. position.
  • PUCCH resource indicator represents the PUCCH resource location on the first carrier
  • PUCCH resource indicator 2 represents the PUCCH resource on the second carrier. position.
  • the first indication information and the second indication information may be indicated by at least one of radio resource control RRC and downlink control information DCI.
  • RRC radio resource control
  • the PUCCH resource location on the first carrier or the second carrier is defined respectively, that is, each PUCCH resource in the RRC signaling
  • the PUCCH resource actually contains indication information of two PUCCH resources on the first carrier and the second carrier.
  • the UE first determines the corresponding PUCCH resource set according to the HARQ information to be transmitted, then determines the corresponding PUCCH resource according to the PUCCH resource indicator contained in the DCI, and finally learns the first carrier and the second carrier according to the PUCCH resource contained in the RRC signaling PUCCH resource location on the
  • the first instruction information adopts a display instruction manner or an implicit instruction manner
  • the second instruction information adopts a display instruction manner or an implicit instruction manner
  • the first indication information is the time indication information between the data contained in the scheduling indication and the feedback, which is used to indicate the feedback resource of the first carrier, while the second indication information adopts an implicit indication.
  • the second indication information is the time indication information between the data contained in the scheduling indication and the feedback, which is used to indicate the feedback resource of the second carrier, and the first indication information adopts an implicit indication.
  • both the first indication information and the second indication information adopt an implicit indication mode.
  • FIG. 6 is a schematic diagram of a feedback resource provided by an embodiment of the present application.
  • Three first carriers are on licensed spectrum, and one second carrier is on unlicensed spectrum.
  • Each carrier includes multiple feedback resources.
  • the first indication information and the second indication information respectively include time indication information between data and feedback, indication information of feedback resources, and indication information for confirming the feedback codebook.
  • K1 represents the time indication information between data and feedback
  • the indication information used to confirm the feedback codebook may include the following information:
  • Feedback group ID used to indicate the feedback group to which the data belongs. For the feedback group that is successfully fed back, the feedback group ID can be released.
  • New feedback indicator used to indicate whether the current feedback is new feedback or re-feedback, which can be indicated by a 1-bit inverted bit or with 1-bit information. For example, “0" means new feedback, and “1" means re-feedback.
  • Multiple groups of feedback request (request) information used to indicate whether to send feedback information of multiple feedback groups together, which can be indicated by a 1-bit inverted bit or by a 1-bit information. For example, “1” means that the feedback information of multiple feedback groups needs to be sent together, and “0” means that it is not needed.
  • DAI Downlink assignment indicator
  • K1 of the second carrier is indicated in an implicit manner.
  • the K1 of the second carrier depends on the capability of the UE.
  • the first carrier and the second carrier may share the indication information used to confirm the feedback codebook, that is, the feedback resources on the first carrier and the second carrier correspond to the feedback resources used to confirm the feedback
  • the instructions of the codebook are the same.
  • the data on time slot 1 in the order from the first carrier C -> the first carrier B -> the first carrier A, the data starts to accumulate in sequence, then the first carrier C, the first carrier B, and the first carrier B
  • the C_DAI on carrier A are 1, 2 and 3 respectively, and since there are a total of 3 data to be fed back in time slot 1, the T_DAI on the first carrier C, the first carrier B, and the first carrier A are all 3. .
  • the indication information corresponding to the feedback of the data on the first carrier C, the first carrier B, and the first carrier A corresponding to other time slots can be obtained.
  • the data in time slot 2 and time slot 4 can be used as a feedback group, and the same group ID can be used. In this case, it is only a dynamic extension of the feedback group. , It is not new data, so NFI is not reversed, and NFI is still 0.
  • the feedback resource on the first carrier is PUCCH
  • the feedback resource on the second carrier is PUCCH4.
  • At least one feedback resource is included on the at least one carrier.
  • the terminal device may select the feedback resource closest to the receiving time of the data from the at least one feedback resource and send the feedback information to the network device, and the network device may receive the feedback resource selected by the terminal device from the at least one feedback resource.
  • the feedback resource on the first carrier is PUCCH
  • the feedback resource on the second carrier is PUCCH. It is PUCCH1. Since PUCCH1 is the closest to the data receiving time, the UE can select PUCCH1 and send HARQ information on PUCCH1, which can effectively reduce the processing delay.
  • the at least one carrier includes feedback resources on the first carrier and feedback resources on the second carrier; when the feedback resources on the first carrier and the feedback resources on the second carrier When the resources overlap in the time domain, the terminal device selects at least one feedback resource from the overlapped feedback resources to send the feedback information to the network device.
  • the network device receives feedback information sent by at least one feedback resource selected by the terminal device from the overlapping feedback resources.
  • coincidence may mean that the feedback resource on the first carrier and the feedback resource on the second carrier completely coincide in the time domain, that is, the start time point and the end time point of the feedback resource are exactly the same.
  • the feedback resource on the first carrier and the feedback resource on the second carrier may be selected to send feedback information together.
  • the data in time slot 2 and time slot 4 are regarded as a feedback group.
  • the UE can choose to send HARQ information on PUCCH or PUCCH4, or choose to send HARQ information on PUCCH and PUCCH4 at the same time.
  • first carrier and the second carrier in the embodiment of the present application are used for logical distinction and do not constitute a quantitative limitation, and may include one or more first carriers, or may include one or more second carriers.
  • time slot is taken as an example of a time unit in the embodiment of the present application, but the present application is not limited to this.
  • the terminal device can select the feedback resource closest to the data reception time from multiple carriers to send the feedback information, which can effectively reduce the data transmission delay.
  • FIG. 7 is a schematic structural diagram of an uplink transmission apparatus according to an embodiment of the present application.
  • the device may include a receiving module 701, a processing module 702, and a sending module 703, where:
  • the receiving module 701 is configured to receive first scheduling information sent by a network device on a first carrier;
  • the receiving module 701 is further configured to receive second scheduling information sent by the network device on the second carrier; wherein, the first scheduling information and the second scheduling information are a subset of scheduling indication information, and the scheduling The indication information is used to indicate the information required by the terminal equipment to send uplink data;
  • the sending module 703 is configured to send the uplink data to the network device on the second carrier according to the first scheduling information and the second scheduling information.
  • the first scheduling information and the second scheduling information include time indication information of the scheduling indication information.
  • At least one of the first carrier and the second carrier is on an unlicensed spectrum.
  • the transmission time of the uplink data is within the channel occupancy time COT obtained by the network device by listening first and then sending the LBT.
  • the sending module 703 is further configured to send the uplink data to the network device after performing LBT when the second carrier is on the unlicensed spectrum.
  • the sending module 703 is further configured to: when the second carrier is on the unlicensed spectrum, the terminal device determines the destination according to at least one of the first scheduling information and the second scheduling information.
  • the sending time of the uplink data determining the time interval between the sending time of the uplink data and the receiving time of the second scheduling information; when the time interval is less than or equal to a preset threshold, the uplink data is sent; when the When the time interval is greater than the preset threshold, the uplink data is sent after performing LBT.
  • the uplink data of the first uplink time unit on the second carrier is adjusted to the second uplink time on the first carrier Unit, wherein the time domain position of the first uplink time unit corresponds to the time domain position of the second uplink time unit.
  • the receiving module 701 is configured to receive data sent by a network device on the first carrier;
  • the processing module 702 is configured to select at least one carrier from the first carrier and the second carrier;
  • the sending module 703 is configured to send feedback information to the network device on the selected at least one carrier, where the feedback information is used to indicate the receiving status of the data;
  • At least one of the first carrier and the second carrier is on a licensed spectrum.
  • the sending module 703 is further configured to send the feedback information to the network device on the first carrier and the second carrier.
  • the sending module 703 is further configured to send the feedback information to the network device after performing LBT on the at least one carrier.
  • the receiving module 701 is further configured to receive scheduling information sent by the network device, where the scheduling information includes first indication information and second indication information, and the first indication information is used to indicate the first carrier The second indication information is used to indicate the feedback resource on the second carrier.
  • the at least one carrier includes at least one feedback resource
  • the sending module 703 is further configured to select, from the at least one feedback resource, the feedback resource closest to the receiving time of the data and send the feedback information to the network device.
  • each module can also refer to the corresponding description of the method embodiment shown in FIG. 3 or FIG. 5 to execute the method and function performed by the terminal device in the foregoing embodiment.
  • FIG. 8 is a schematic structural diagram of another uplink transmission apparatus provided by an embodiment of the present application.
  • the device may include a sending module 801 and a receiving module 802, where:
  • the sending module 801 is configured to send first scheduling information to the terminal device on the first carrier;
  • the sending module 801 is further configured to send second scheduling information to the terminal device on the second carrier; wherein the first scheduling information and the second scheduling information are a subset of scheduling indication information, and the scheduling indication information is used for To instruct the terminal equipment to send the information required for the uplink data;
  • the receiving module 802 is configured to receive the uplink data sent by the terminal equipment on the second carrier.
  • the first scheduling information and the second scheduling information include time indication information of the scheduling indication information.
  • At least one of the first carrier and the second carrier is on an unlicensed spectrum.
  • the transmission time of the uplink data is within the channel occupancy time COT obtained by the network device by listening first and then sending the LBT.
  • the sending module 801 is further configured to send the first scheduling information to the terminal device after performing LBT on the first carrier when the first carrier is on the unlicensed spectrum.
  • the sending module 801 is further configured to send the second scheduling information to the terminal device after performing LBT on the second carrier when the second carrier is on the unlicensed spectrum.
  • the uplink data of the first uplink time unit on the second carrier is adjusted to the second uplink time on the first carrier Unit, wherein the time domain position of the first uplink time unit corresponds to the time domain position of the second uplink time unit.
  • the sending module 801 is configured to send data to the terminal device on the first carrier
  • the receiving module 802 is configured to receive feedback information sent by the terminal equipment on at least one carrier, where the at least one carrier is selected by the terminal equipment from the first carrier and the second carrier;
  • At least one of the first carrier and the second carrier is on a licensed spectrum.
  • the receiving module 801 is further configured to receive feedback information sent by the terminal equipment on the first carrier and the second carrier.
  • the sending module 801 is further configured to send scheduling information to the network device, where the scheduling information includes first indication information and second indication information, and the first indication information is used to indicate The second indication information is used to indicate the feedback resource on the second carrier.
  • the at least one carrier includes at least one feedback resource
  • the receiving module 802 is further configured to receive the feedback information sent by the terminal device selecting the feedback resource that is closest to the receiving time of the data from the at least one feedback resource.
  • each module can also refer to the corresponding description of the method embodiment shown in FIG. 3 or FIG. 5 to execute the method and function performed by the network device in the foregoing embodiment.
  • FIG. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the terminal device may include: at least one processor 901, at least one communication interface 902, at least one memory 903, and at least one communication bus 904.
  • the processor 901 may be a central processing unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on.
  • the communication bus 904 may be a standard PCI bus for interconnecting peripheral components or an extended industry standard structure EISA bus. The bus can be divided into an address bus, a data bus, a control bus, and so on.
  • the communication bus 904 is used to implement connection and communication between these components.
  • the communication interface 902 of the device in the embodiment of the present application is used for signaling or data communication with other node devices.
  • the first scheduling information and the second scheduling information include time indication information of the scheduling indication information.
  • At least one of the first carrier and the second carrier is on an unlicensed spectrum.
  • the transmission time of the uplink data is within the channel occupancy time COT obtained by the network device by listening first and then sending the LBT.
  • processor 901 is further configured to perform the following operations:
  • the uplink data is sent to the network device after performing LBT.
  • processor 901 is further configured to perform the following operations:
  • the second carrier When the second carrier is on an unlicensed spectrum, determine the transmission time of the uplink data according to at least one of the first scheduling information and the second scheduling information;
  • the uplink data is sent; when the time interval is greater than the preset threshold, the uplink data is sent after performing LBT.
  • the uplink data of the first uplink time unit on the second carrier is adjusted to the second uplink time on the first carrier Unit, wherein the time domain position of the first uplink time unit corresponds to the time domain position of the second uplink time unit.
  • At least one of the first carrier and the second carrier is on a licensed spectrum.
  • processor 901 is further configured to perform the following operations:
  • processor 901 is further configured to perform the following operations:
  • the feedback information is sent to the network device.
  • processor 901 is further configured to perform the following operations:
  • the scheduling information includes first indication information and second indication information
  • the first indication information is used to indicate feedback resources on the first carrier
  • the second indication information Used to indicate the feedback resource on the second carrier.
  • processor 901 is further configured to perform the following operations:
  • the processor may also cooperate with the memory and the communication interface to perform the operation of the terminal device in the above-mentioned application embodiment.
  • FIG. 10 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • the network device may include: at least one processor 1001, at least one communication interface 1002, at least one memory 1003, and at least one communication bus 1004.
  • the processor 1001 may be various types of processors mentioned above.
  • the communication bus 1004 may be a standard PCI bus for interconnecting peripheral components or an extended industry standard structure EISA bus. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used to represent in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the communication bus 1004 is used to implement connection and communication between these components. Among them, the communication interface 1002 of the device in the embodiment of the present application is used for signaling or data communication with other node devices.
  • the memory 1003 may be various types of memories mentioned above. Optionally, the memory 1003 may also be at least one storage device located far away from the foregoing processor 1001.
  • the memory 1003 stores a set of program codes, and the processor 1001 executes the programs in the memory 1003.
  • the first scheduling information and the second scheduling information include time indication information of the scheduling indication information.
  • At least one of the first carrier and the second carrier is on an unlicensed spectrum.
  • the transmission time of the uplink data is within the channel occupancy time COT obtained by the network device by listening first and then sending the LBT.
  • the network device sending the first scheduling information to the terminal device on the first carrier and sending the second scheduling information to the terminal device on the second carrier includes:
  • processor 1001 is further configured to perform the following operations:
  • processor 1001 is further configured to perform the following operations:
  • the second scheduling information is sent to the terminal device after performing LBT on the second carrier.
  • the uplink data of the first uplink time unit on the second carrier is adjusted to the second uplink time on the first carrier Unit, wherein the time domain position of the first uplink time unit corresponds to the time domain position of the second uplink time unit.
  • At least one of the first carrier and the second carrier is on a licensed spectrum.
  • processor 1001 is further configured to perform the following operations:
  • processor 1001 is further configured to perform the following operations:
  • processor 1001 is further configured to perform the following operations:
  • the scheduling information includes first indication information and second indication information
  • the first indication information is used to indicate feedback resources on the first carrier
  • the second indication information is used To indicate the feedback resource on the second carrier.
  • processor 1001 is further configured to perform the following operations:
  • Receiving the feedback information sent by the terminal device selecting, from the at least one feedback resource, the feedback resource that is closest to the receiving time of the data.
  • processor may also cooperate with the memory and the communication interface to perform the operation of the network device in the above-mentioned application embodiment.
  • the embodiments of the present application also provide a chip system, which includes a processor, which is used to support terminal devices or network devices to implement the functions involved in any of the above embodiments, such as generating or processing the functions involved in the above methods. Data and/or information.
  • the chip system may further include a memory, and the memory is used for necessary program instructions and data of a terminal device or a network device.
  • the chip system can be composed of chips, or include chips and other discrete devices.
  • the embodiments of the present application also provide a processor, which is configured to be coupled with a memory and configured to execute any method and function involving a terminal device or a network device in any of the foregoing embodiments.
  • the embodiments of the present application also provide a computer program product, which when running on a computer, enables the computer to execute any method and function involving a terminal device or a network device in any of the foregoing embodiments.
  • the embodiment of the present application also provides an uplink transmission device, which is used to execute any method and function related to a terminal device or a network device in any of the foregoing embodiments.
  • the computer 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 instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

Les modes de réalisation selon la présente invention concernent un procédé de transmission en liaison montante, qui est applicable à un système de communication, tel que V2X, LTE-V, MTC, IdO, LTE-M et M2M, et qui peut améliorer la capacité en liaison montante. Ledit procédé consiste : en la réception par le dispositif terminal de premières informations de programmation envoyées par un dispositif de réseau sur une première porteuse, et de deuxièmes informations de programmation envoyées sur une deuxième porteuse, les premières informations de programmation et les deuxièmes informations de programmation étant un sous-ensemble d'informations d'instructions de programmation, les informations d'instructions de programmation servant à ordonner au dispositif terminal d'envoyer des informations requises par des données en liaison montante ; et en fonction des premières informations de programmation et des deuxièmes informations de programmation, en l'envoi, sur la deuxième porteuse, des données en liaison montante au dispositif de réseau.
PCT/CN2019/109232 2019-09-29 2019-09-29 Procédé et appareil de transmission en liaison montante WO2021056583A1 (fr)

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