WO2019109945A1 - Procédé et dispositif de transmission de données sur un spectre sans licence, et support d'informations - Google Patents

Procédé et dispositif de transmission de données sur un spectre sans licence, et support d'informations Download PDF

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Publication number
WO2019109945A1
WO2019109945A1 PCT/CN2018/119350 CN2018119350W WO2019109945A1 WO 2019109945 A1 WO2019109945 A1 WO 2019109945A1 CN 2018119350 W CN2018119350 W CN 2018119350W WO 2019109945 A1 WO2019109945 A1 WO 2019109945A1
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Prior art keywords
user equipment
network device
pusch resource
symbol
symbols
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PCT/CN2018/119350
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English (en)
Chinese (zh)
Inventor
程勇
方平
Original Assignee
华为技术有限公司
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Priority claimed from CN201810118372.2A external-priority patent/CN109890076B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2019109945A1 publication Critical patent/WO2019109945A1/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

Definitions

  • the present application relates to communication technologies, and in particular, to a data transmission method, device, and storage medium on an unlicensed spectrum.
  • the 5G mobile communication system will provide users with higher system bandwidth and data rate for cellular mobile communication systems (also known as cellular wireless communication systems).
  • cellular mobile communication systems also known as cellular wireless communication systems.
  • the new radio (NR) of the 5G mobile communication system will adopt a relatively large frequency bandwidth, for example, 400 MHz (megahertz).
  • the wireless spectrum resources that can be used in mobile communication systems around the world are becoming more and more tense, especially the licensed spectrum resources are becoming scarcer.
  • the NR of the 5G mobile communication system will use high frequency resources, for example, licensed spectrum resources in the 30 GHz and 60 GHz (Gigahertz, GHz, gigahertz) bands, on the other hand, 5G mobile
  • the mobile communication systems following the communication systems NR and 5G will use an unlicensed spectrum, also known as a license-exempt spectrum, such as unlicensed spectrum resources on the 5Ghz, 37Ghz and 60Ghz bands, To further expand the spectrum resources available to the mobile communication system.
  • the mobile communication system When the mobile communication system operates on the unlicensed spectrum, because the unlicensed spectrum can be shared by many communication systems (for example, Wireless Fidelity (Wi-Fi) and other mobile communication devices, the network device of the mobile communication system And the user equipment needs to perform Clear Channel Assessment (CCA) and channel contention before sending the message to avoid (or minimize) interference to communication between other devices. For example, the user equipment needs to wait for the channel idle duration to be greater than or equal to 25 ⁇ s (subtle) to start sending a message, and the start time of the user equipment to send the message is uncertain.
  • CCA Clear Channel Assessment
  • the network device sends uplink scheduling information to the user equipment to schedule the
  • the user equipment sends an uplink message to the network device, where the physical uplink shared channel (PUSCH) resource allocated by the network device starts from the symbol 0, ends at the symbol 13, and specifies the 14 symbols.
  • PUSCH physical uplink shared channel
  • MCS modulation and A coding scheme
  • TBS uplink transport block size
  • the user equipment selects the appropriate modulation and coding based on the result of the contention channel.
  • a Modulation and Coding Scheme such as a user equipment, selects a set of conditions suitable for 7 symbols.
  • the selected modulation and coding scheme is different from the modulation and coding scheme specified by the network device.
  • the user equipment competes for 7 symbols for data transmission, while the network device allocates 14 symbols for data transmission, and the user equipment transmission time is reduced by half according to the competition result. Even if the user equipment can select different MCSs, if the TBS is unchanged, the effective transmission rate of the user equipment is twice as high as the network transmission rate predicted by the network equipment, resulting in lower reliability of the uplink transmission of the user equipment.
  • the present invention provides a method, a device, and a storage medium for data transmission on an unlicensed spectrum, which are used to solve the problem that the effective transmission rate of the user equipment is higher than the predicted transmission rate of the network equipment, thereby reducing the reliability of the uplink transmission of the user equipment. .
  • the application provides a data transmission method on an unlicensed spectrum, the method comprising:
  • uplink scheduling information that is sent by the network device, where the uplink scheduling information includes information about a PUSCH resource allocated by the network device to the user equipment;
  • the user equipment estimates the number of available PUSCH resource symbols according to the uplink scheduling information
  • the user equipment sends a corresponding at least one MAC PDU from the plurality of MAC PDUs to the network device according to the at least one TBS;
  • the user equipment receives an ACK message or a NACK message sent by the network device.
  • the user equipment determines, according to the contention result and the number of available PUSCH resource symbols, the at least one TBS to be used from all available TBSs, including:
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the end position of the allocated PUSCH resource determined by the user equipment is one or more symbols later than the end position of the allocated PUSCH resource indicated in the uplink scheduling information.
  • the uplink scheduling information includes: a number of PRBs allocated by the network device to the user equipment, and a modulation and coding scheme MCS, where the content according to the contention and the available PUSCH resource symbol Number, determining at least one TBS to be used from all available TBSs, including:
  • the user equipment determines at least one TBS to be used according to the contention result, the number of available PUSCH resource symbols, the number of the PRBs, and the modulation and coding scheme.
  • the PUSCH resource symbol includes any one of the following symbols:
  • the method further includes:
  • the PHY layer of the user equipment feeds back information of at least one MAC PDU sent to the network device to the user equipment MAC layer.
  • the method further includes:
  • the user equipment receives a message sent by the network device for triggering uplink transmission of the user equipment or triggering the user equipment to start a contention channel.
  • the application provides a data transmission method on an unlicensed spectrum, where the method includes:
  • the network device sends the uplink scheduling information to the user equipment, where the uplink scheduling information includes information about the PUSCH resource allocated by the network device to the user equipment;
  • the network device sends an ACK message or a NACK message to the user equipment.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the method before the network device receives the at least one MAC PDU sent by the user equipment on the PUSCH resource, the method further includes:
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information further includes: a number of PRBs allocated by the network device to the user equipment, and an MCS.
  • the symbol of the PUSCH resource includes any one of the following symbols:
  • the method further includes:
  • the network device sends a message to the user equipment for triggering uplink transmission of the user equipment or triggering the user equipment to start a contention channel.
  • the application provides a user equipment, including:
  • a receiving module configured to receive uplink scheduling information sent by the network device, where the uplink scheduling information includes information about a physical uplink shared channel PUSCH resource allocated by the network device to the user equipment;
  • Processing module for:
  • a sending module configured to send, according to the at least one TBS, a corresponding at least one MAC PDU from the multiple MAC PDUs to the network device;
  • the receiving module is further configured to receive an acknowledgement ACK message or a negative acknowledgement NACK message sent by the network device.
  • processing module is specifically configured to:
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the end position of the allocated PUSCH resource determined by the processing module is one or more symbols later than the end position of the allocated PUSCH resource indicated in the uplink scheduling information.
  • the uplink scheduling information includes: a number of PRBs allocated by the network device to the user equipment, and a modulation and coding scheme MCS, where the processing module is further configured to:
  • At least one TBS to be used is determined according to the contention result, the number of available PUSCH resource symbols, the number of the PRBs, and the modulation and coding scheme.
  • the PUSCH resource symbol includes any one of the following symbols:
  • the PHY layer of the user equipment feeds back information of the at least one MAC PDU sent to the network device to the MAC layer of the user equipment.
  • the receiving module is further configured to receive, by the network device, a message for triggering uplink transmission of the user equipment or triggering the user equipment to start a contention channel.
  • the application provides a network device, including:
  • a sending module configured to send uplink scheduling information to the user equipment, where the uplink scheduling information includes information about a PUSCH resource allocated by the network device to the user equipment;
  • a receiving module configured to receive, on the PUSCH resource, at least one MAC PDU sent by the user equipment
  • the sending module is further configured to send an ACK message or a NACK message to the user equipment.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the network device further includes:
  • a processing module configured to determine a start location and an end location of the at least one MAC PDU in a time domain
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information further includes: a number of PRBs allocated by the network device to the user equipment, and an MCS.
  • the symbol of the PUSCH resource includes any one of the following symbols:
  • the sending module is further configured to send, to the user equipment, a message for triggering uplink transmission of the user equipment or triggering the user equipment to start a contention channel.
  • the application provides a user equipment, including:
  • a receiver configured to receive uplink scheduling information sent by the network device, where the uplink scheduling information includes information about a PUSCH resource allocated by the network device to the user equipment;
  • a transmitter configured to send, according to the at least one TBS, a corresponding at least one MAC PDU from the multiple MAC PDUs to the network device;
  • the receiver is further configured to receive an ACK message or a NACK message sent by the network device.
  • the processor is specifically configured to:
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the end position of the allocated PUSCH resource determined by the processor is one or more symbols later than an end position of the allocated PUSCH resource indicated in the uplink scheduling information.
  • the uplink scheduling information includes: a number of PRBs that are allocated by the network device to the user equipment, and an MCS, where the processor is further configured to:
  • the PUSCH resource symbol includes any one of the following symbols:
  • the PHY layer of the user equipment feeds back information about the at least one MAC PDU sent to the network device to the user equipment MAC layer.
  • the receiver is further configured to receive a message that is sent by the network device to trigger an uplink transmission of the user equipment or trigger the user equipment to start a contention channel.
  • the number of processors is at least one, and is used to execute an execution instruction of the memory storage, that is, a computer program.
  • the data transmission method on the unlicensed spectrum provided by the various embodiments of the foregoing first aspect is performed by the user equipment performing data interaction with the network device through the communication interface.
  • the memory may also be integrated inside the processor.
  • the application provides a network device, including:
  • a transmitter configured to send, to the user equipment, uplink scheduling information, where the uplink scheduling information includes information about a PUSCH resource allocated by the network device to the user equipment;
  • a receiver configured to receive, on the PUSCH resource, at least one MAC PDU sent by the user equipment
  • the transmitter is further configured to send an ACK message or a NACK message to the user equipment.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the network device further includes:
  • a processor configured to determine a start position and an end position of the at least one MAC PDU in a time domain
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information further includes: a number of PRBs allocated by the network device to the user equipment, and an MCS.
  • the symbol of the PUSCH resource includes any one of the following symbols:
  • the sender is further configured to send, to the user equipment, a message for triggering the user equipment to start an uplink transmission or triggering the user equipment to start a contention channel.
  • the number of processors is at least one, and is used to execute an execution instruction of the memory storage, that is, a computer program.
  • the data transmission method on the unlicensed spectrum provided by the various embodiments of the foregoing aspects is performed by the network device by performing data interaction between the network device and the user equipment.
  • the memory may also be integrated in the processor.
  • the present application provides a user equipment, including: a memory, a processor, a transmitter, a receiver, and a computer program, where the computer program is stored in the memory, and the processor runs the computer program first Any of the data transmission methods on the unlicensed spectrum provided by any of the aspects.
  • the present application provides a network device, including: a memory, a processor, a transmitter, a receiver, and a computer program, where the computer program is stored in the memory, and the processor runs the computer program to execute A method of data transmission on an unlicensed spectrum provided by any of the two aspects.
  • the present application provides a storage medium for storing a computer program for implementing the data transmission method on the unlicensed spectrum provided by any of the first aspects.
  • the present application provides a storage medium for storing a computer program, the computer program for implementing the data transmission method on the unlicensed spectrum provided by any one of the second aspects.
  • the application provides a program product comprising a computer program (ie, an execution instruction) stored in a readable storage medium.
  • a computer program ie, an execution instruction
  • At least one processor of the user device can read the computer program from a readable storage medium, and the at least one processor executes the computer program such that the user device implements the data transmission method on the unlicensed spectrum provided by the various embodiments of the first aspect.
  • the present application provides a program product comprising a computer program (ie, an execution instruction) stored in a readable storage medium.
  • a computer program ie, an execution instruction
  • At least one processor of the network device can read the computer program from a readable storage medium, the at least one processor executing the computer program to cause the network device to implement the data transmission method on the unlicensed spectrum provided by the various embodiments of the second aspect above .
  • the user equipment receives uplink scheduling information of the information carrying the PUSCH resource sent by the network device, estimates the number of available PUSCH resource symbols according to the uplink scheduling information, and determines All available TBSs generate MAC PDUs that can be carried by each transport block, and the user equipment performs channel contention, and determines the TBS to be used according to the contention result and the number of available PUSCH resource symbols, and multiple TBSs according to the transport block length. At least one MAC PDU is selected from the MAC PDU and sent to the network device, and receives a feedback message.
  • the user equipment determines the number of available PUSCH symbols and the TBS by competing for the channel result, does not change the MCS specified by the network device, ensures the reliability of the uplink transmission, reduces the number of retransmissions, and improves the resource utilization efficiency.
  • 1 is a schematic diagram of a PUSCH resource start time and an end time
  • FIG. 2 is a schematic structural diagram of a user equipment provided by the present application.
  • FIG. 3 is a schematic structural diagram of a network device provided by the present application.
  • Embodiment 4 is a flowchart of Embodiment 1 of a data transmission method on an unlicensed spectrum according to the present application;
  • FIG. 5 is a flowchart of Embodiment 2 of a data transmission method on an unlicensed spectrum according to the present application
  • FIG. 6 is a schematic diagram of a PUSCH available symbol number according to the present application.
  • FIG. 7 is a schematic diagram of MAC layer and PHY layer message interaction of a user equipment provided by the present application.
  • FIG. 8 is a schematic diagram of a UE self-adjusting end position provided by the present application.
  • FIG. 9 is a schematic structural diagram of Embodiment 1 of a user equipment provided by the present application.
  • FIG. 10 is a schematic structural diagram of Embodiment 1 of a network device according to the present application.
  • the mobile communication system works on the unlicensed spectrum
  • the unlicensed spectrum can be shared by many communication systems (for example, Wireless Fidelity (Wi-Fi) and other wireless communication devices
  • Wi-Fi Wireless Fidelity
  • the network device of the mobile communication system Both the user equipment and the user equipment need to perform Clear Channel Assessment (CCA and channel contention) to avoid (or minimize) interference with other equipments.
  • CCA Clear Channel Assessment
  • Common channel competition methods are Listen Before Talk (LBT) and Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA).
  • FIG. 1 is a schematic diagram of a PUSCH resource start time and an end time, as shown in FIG.
  • PUSCH physical uplink shared channel resource allocated by the network device to the user equipment.
  • the PUSCH resource allocated by the network device to the user equipment starts from symbol 0 (A)
  • the user equipment may only be able to compete due to the uncertainty of the channel result of the user equipment (this is because the time when the user equipment waits until the channel is idle)
  • the transmission starts from symbol 7 and ends at symbol 13.
  • Figure 1 also illustrates other possible end positions, for example, symbol 6 (a) symbol 10 (b), or symbol 12 (c).
  • TBS transport block size
  • the network device starts from the symbol 0 according to the PUSCH resource and allocates a transport block size (TBS) to the user equipment at the end of the symbol 13 (it should be understood that in the embodiment of the present application, the length of the TBS, the transport block, The physical meaning of the transport block length and the transport block size is the same.
  • TBS transport block size
  • the user equipment starts to transmit the uplink message from the symbol 7, the uplink transmission rate of the user equipment is almost doubled, which will significantly affect the user equipment.
  • the reliability of uplink transmission If the uplink transmission fails, the user equipment needs to re-competition the channel for retransmission, which wastes time-frequency resources and increases communication delay.
  • the user equipment selects a suitable Modulation and Coding Scheme (MCS) based on the results of the contention channel. For example, there can be two sets of MCS tables, one for a 14-symbol case and the other for a 7-symbol case.
  • MCS Modulation and Coding Scheme
  • the selected modulation and coding scheme may be different from the modulation and coding scheme specified by the network device. If the PUSCH resource allocated by the network device to the user equipment starts from symbol 0, and the result of the user equipment competing for the channel is transmitted from symbol 7, the user equipment transmission time is reduced by half.
  • the network device Even if the user equipment can select different MCSs, if the transport block length (TBS) is unchanged, the effective transmission rate of the user equipment is twice as high as the network transmission rate predicted by the network equipment, so that it is difficult to ensure the reliability of the uplink transmission of the user equipment. If the user equipment transmits an error, the network device further requests the user equipment to retransmit, resulting in further waste of time-frequency resources and increased communication delay.
  • TCS transport block length
  • the PUSCH resource allocated by the network device to the user equipment starts from symbol 0, ends at symbol 13, and the result of the user equipment competing for the channel is transmitted from symbol 0, and the user equipment can use 14 symbols.
  • the network device allocates the transport block length too conservatively (for example, allocates the transport block length according to 7 symbols), it will cause waste of PUSCH resources, affecting spectrum efficiency and the instantaneous uplink communication rate of the user equipment and Throughput.
  • the present application provides a data transmission method on an unlicensed spectrum, so that the user equipment effectively controls and improves the reliability of the uplink transmission of the user equipment in the face of the uncertainty of the content of the contention channel.
  • FIG. 2 is a schematic structural diagram of a user equipment provided by the present application.
  • the user equipment involved in the present application includes at least: 5G UE (a user equipment or terminal supporting the next generation mobile communication standard, for example, A smartphone, tablet, etc., or other 5G user device or terminal that can operate on an unlicensed spectrum.
  • user equipment 100 may include at least one or more transceivers 101 (also referred to as transceivers), one or more processors 102, and one or more memories 103, one or more antennas. 104.
  • the user equipment may implement a method performed by a user equipment in any of the method embodiments provided by the application, and the memory 103 is configured to store an instruction.
  • the processor 102 can invoke instructions in the memory 103 to cause the UE to perform an associated method.
  • the processor 102 and the transceiver 101 and the memory 103 are connected by a bus to implement data exchange.
  • the receiving transmitter 101 implements wireless communication between the UE and the network device in the embodiment of the present application under the control of the processor 102.
  • FIG. 3 is a schematic structural diagram of a network device according to the present application.
  • the network device involved in the present application includes at least: 5G gNB (base station device in a next-generation mobile communication system), or transmission and reception.
  • network device 200 can include at least one or more transceivers 201, one or more processors 202, one or more memories 203, one or more antennas 304, and one or more other interfaces. 205 (eg, fiber optic link interface, Ethernet interface, microwave link interface, and/or copper interface, etc.).
  • the network device 200 can implement the method performed by the network device in any of the method embodiments provided by the present application.
  • the memory 203 is used to store instructions.
  • the processor 202 can invoke instructions in the memory 203 to cause the network device 200 to perform related methods.
  • the processor 202 and the transceiver 202 and the memory 203 are connected by a bus to implement data exchange.
  • the receiving transmitter 201 implements wireless communication between the network device and the user equipment in the embodiment of the present application under the control of the processor 202.
  • FIG. 4 is a flowchart of Embodiment 1 of a data transmission method on an unlicensed spectrum according to the present application. As shown in FIG. 4, the data transmission method on the unlicensed spectrum provided by this embodiment specifically includes the following steps:
  • the network device sends uplink scheduling information to the user equipment, where the uplink scheduling information includes information about a PUSCH resource allocated by the network device to the user equipment.
  • the user equipment receives the uplink scheduling information that is sent by the network device that serves the user equipment, and the uplink scheduling information includes at least information about the PUSCH resource allocated by the network device to the UE, where the PUSCH resource can be used for the user.
  • the device sends one or more MAC PDUs to the network device.
  • the user equipment estimates the number of available PUSCH resource symbols according to the uplink scheduling information.
  • the user equipment estimates the number of available PUSCH symbols.
  • the uplink scheduling information may include a starting position and/or an ending position of the allocated PUSCH resource in the time domain, and the available PUSCH symbols are estimated, for example,
  • the uplink scheduling information indicates the starting position of the PUSCH symbol in the time domain, and the user equipment can estimate the number of available PUSCH symbols according to the configured possible ending position. This solution is not limited.
  • the starting position refers to the first symbol of the message sent by the user equipment to the network device
  • the ending position refers to the last symbol of the message sent by the user equipment to the network device.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the uplink scheduling information includes the PRB number information allocated by the network device to the user equipment, and the MCS information
  • the user equipment is configured according to at least the PRB number information, the MCS, and the estimation.
  • the number of available PUSCH resource symbols determines the TBS.
  • the transport block size (TBS) is determined by the number of physical resource blocks (PRBs), the modulation and coding scheme, and the number of PUSCH symbols. The user equipment needs to consider these three parameters simultaneously when determining or estimating the transport block length (TBS).
  • the user equipment determines all available TBSs according to the number of available PUSCH resource symbols, and generates a plurality of MAC PDUs that can be carried by each transport block.
  • the user equipment determines the length of one or more transport blocks according to at least the estimated number of available PUSCH resource symbols, and generates a plurality of MAC PDUs that can be carried by the transport blocks of each length.
  • S104 The user equipment performs channel contention, and determines at least one transport block length to be used from all available transport block lengths according to the contention result and the number of available PUSCH resource symbols.
  • the user equipment determines, according to the contention result, a start location and an end location of the PUSCH resource that the user equipment can use in the time domain; and the user equipment according to the available PUSCH resource symbol.
  • the number, the start location, and the end location determine at least one TBS; wherein the start location refers to a first symbol of the user equipment transmitting data to the network device, and the end location refers to the user
  • the device sends the last symbol of the data to the network device.
  • the user equipment is allowed to determine the start position and the end position of the uplink message sent by the user equipment to the network device according to the channel competition result, so that the PUSCH resource can be used more flexibly, and the resource utilization efficiency is improved.
  • the network device device needs to be able to detect and determine the start and end locations of messages sent by the user device to the network device.
  • the user equipment sends a corresponding at least one MAC PDU from the multiple MAC PDUs to the network device according to the at least one transport block length.
  • the network device schedules the user equipment to send the uplink message, and the multiple user equipments can be enabled to multiplex the uplink spectrum resources, for example, multi-user Orthogonal Frequency Division Multiple Access (Multi-User Orthogonal Frequency Division Multiple Access). , MU-OFDMA), improving resource utilization efficiency and system throughput.
  • multi-user Orthogonal Frequency Division Multiple Access Multi-User Orthogonal Frequency Division Multiple Access
  • MU-OFDMA MU-OFDMA
  • the user equipment estimates the number of available PUSCH symbols according to the uplink scheduling information, and generates MAC PDUs of different lengths corresponding to the number of different PUSCH symbols.
  • the user equipment may select the corresponding length of the MAC PDU transmission according to the number of available PUSCH symbols that are contending, the user The device can continue to use the modulation and coding scheme (MCS) specified by the network device to ensure the reliability of the uplink transmission and reduce the probability of retransmission of the uplink transmission error.
  • MCS modulation and coding scheme
  • the physical layer of the communication protocol stack of the user equipment feeds back one or more MAC PDU information sent to the network device to the MAC layer of the communication protocol stack of the user equipment. Because the MAC layer transmits a plurality of MAC PDUs of different lengths to the PHY layer, the PHY layer of the communication protocol stack of the user equipment needs to feed back to the MAC layer which MAC PDU or MAC PDUs are sent to the network device, so that the MAC layer manages and Update the MAC layer buffer status information.
  • the user equipment receives an ACK message or a NACK message sent by the network device.
  • the network device receives at least one MAC PDU sent by the user equipment on the PUSCH resource, and after correctly correcting and receiving the MAC PDU, the network device feeds back the ACK message to the user equipment, otherwise returns a NACK message to the user equipment.
  • the ending location of the allocated PUSCH resource determined by the user equipment may be greater than the allocated PUSCH resource indicated in the first message.
  • One or more symbols at the end of the position may be greater than the allocated PUSCH resource indicated in the first message.
  • the network device may indicate the ending position of the allocated PUSCH resource in the uplink scheduling information sent to the user equipment, which may simplify the network device and the user equipment to determine the end position of the uplink message sent by the user equipment.
  • the user equipment can adjust the end position of the allocated PUSCH resource by itself, and use the available PUSCH resources to send uplink messages as much as possible, so as to ensure the reliability of the uplink transmission.
  • the user equipment may determine the number of available PUSCH resource symbols according to the result of the channel competition, and the corresponding TBS, and the user equipment may not change the modulation and coding specified by the network device. Solution to ensure the reliability of uplink transmission and reduce the number of retransmissions, and also improve resource utilization efficiency.
  • FIG. 5 is a flowchart of Embodiment 2 of a method for transmitting data on an unlicensed spectrum according to the present application. As shown in FIG. 5, the data transmission method on the unlicensed spectrum specifically includes the following steps:
  • S201 The network device sends the first message to the user equipment.
  • the network device sends a first message to the user equipment (for example, the UE), that is, the uplink information is carried by the first message.
  • the first message may be an uplink grant (UL grant) sent on a Physical Downlink Control Channel (PDCCH), or the first message may be another message, for example, a random access response message (Random) Access Response, RAR), or Radio Resource Control (RRC) message.
  • UL grant uplink grant
  • PDCCH Physical Downlink Control Channel
  • RAR random access response message
  • RRC Radio Resource Control
  • the first message carries the uplink scheduling information of the network device to the user equipment, that is, the network device schedules scheduling information that the user equipment sends a message to the network device.
  • the uplink scheduling information includes physical uplink shared channel (PUSCH) resource information allocated by the network device to the user equipment.
  • the uplink scheduling information may include the following information: a starting position and an ending position of a physical resource block (PRB) in a frequency domain, or a starting position and a PRB of a physical resource block (PRB) in a frequency domain.
  • the number P one or two transport block sizes (TBS), and a Modulation and Coding Scheme (MCS) corresponding to each transport block (TB).
  • the uplink scheduling information may include two or More than two transport block lengths and a modulation and coding scheme corresponding to each transport block (TB). It should be noted that the user equipment may also determine the number P of the PRBs according to the start position and the end position of the allocated PRB in the frequency domain.
  • MIMO multiple-input multiple-output
  • the uplink scheduling information may further include a starting position of a PUSCH resource (ie, a PRB) allocated by the network device in the time domain. As shown in FIG. 1 , the starting position may be a symbol 0.
  • the uplink scheduling information may further include an ending position of the allocated PUSCH resource in the time domain. As shown in FIG. 1 , the ending location may be a symbol 12 .
  • S202 The network device sends a second message to the user equipment.
  • step S202 is an optional step, that is, the network device may choose not to send the second message to the user equipment.
  • the network device simultaneously schedules multiple user equipments to implement uplink multi-user multiple input multiple output
  • the network device may choose to send the foregoing second message, so as to trigger multiple user equipments to simultaneously send messages to the network device, and multiple users can be implemented.
  • the upstream transmission of the device is synchronized.
  • the second message may be a message sent on the PDCCH.
  • the network device may also choose to send the second message to the user equipment to trigger the user equipment to start channel contention.
  • the user equipment may estimate the number of PUSCH symbols that the user equipment may use according to the uplink scheduling information.
  • the uncertainty of the number of PUSCH symbols available to the user equipment due to the uncertainty of the user equipment's contention channel result.
  • the user equipment can estimate the number of available PUSCH symbols.
  • the symbol (or PUSCH symbol) referred to in the technical solution of the present application may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol, or may be a cyclic prefix orthogonal frequency division multiplexing (Cyclic Prefix (CP)).
  • OFDM Orthogonal Frequency Division Multiplexing
  • CP Cyclic Prefix
  • an OFDM symbol or may be a Discrete Fourier Transform-Spread-OFDM (DFT-S-OFDM) symbol of discrete Fourier transform spread, or may be a filter-orthogonal frequency Filtered-OFDM (F-OFDM) symbols, or may be Single-Carrier Frequency-Division Multiple Access (SC-FDMA) symbols, or may be a filter bank multi-carrier (Filter Bank Multicarrier, FBMC) symbol, or may be a Universal Filtered Multi-Carrier (UFMC) symbol, or may be a Generalized Frequency Division Multiplexing (GFDM) symbol, or may be other forms.
  • SC-FDMA Single-Carrier Frequency-Division Multiple Access
  • FBMC Filter Bank Multicarrier
  • UFMC Universal Filtered Multi-Carrier
  • GFDM Generalized Frequency Division Multiplexing
  • FIG. 6 is a schematic diagram of the number of available symbols of a PUSCH according to the present application.
  • the symbol is included in a PUSCH resource allocated by the network device to the user equipment.
  • an uplink grant ie, the uplink scheduling information is used as an example.
  • the uplink grant may also include other numbers of PUSCH symbols, for example, 12.
  • the embodiment of the present invention does not limit the number of PUSCH symbols included in the uplink grant.
  • the user equipment may start sending an uplink message from symbol 0, and end the transmission of an uplink message at symbol 10.
  • a total of 11 PUSCH symbols may be used by the user equipment to send an uplink message.
  • the user equipment needs a channel contention, for example, Listen-Before-Talk (LBT).
  • LBT Listen-Before-Talk
  • the mechanism waits until the channel is idle before sending a message to the network device. Due to the uncertainty of the user equipment competing for the channel result, although the network device expects the user equipment to start sending an uplink message from the symbol 0 to the network device, the user equipment may not compete for the opportunity to send a message starting from the symbol 0.
  • the channel is still busy, but instead competes for the opportunity to send a message starting with symbol 7.
  • the number of PUSCH symbols that the user equipment can use to send uplink messages is only four (ie, symbol 7 to symbol 10).
  • the user equipment may estimate the number of PUSCH symbols available to the user equipment according to a possible starting position and a possible ending position of the allocated PUSCH resource in the time domain.
  • a possible starting position may be specified by the network device, or may be determined by the user equipment, or may be determined by the user equipment according to a result of the contention channel; a possible ending position may be determined by the user equipment
  • the network device is specified or can be determined by the user equipment, and the application is not limited thereto.
  • the starting position is symbol 0 and the ending position is symbol 13, then there are 14 available PUSCH symbols; if the starting position is symbol 1 and the ending position is symbol 3, then there are 3 available PUSCH symbols; if the starting position is Symbol 7, the end position is symbol 13, then there are 7 available PUSCH symbols; if the starting position is symbol 8 and the ending position is symbol 12, then there are 5 available PUSCH symbols. And so on.
  • the user equipment estimates that there may be K kinds of available PUSCH symbols, which are respectively N 1 , N 2 , N 3 , . . . , N K symbols, where K is greater than or equal to 1.
  • S204 Packing the MAC subPDU and the MAC PDU.
  • the user equipment determines K corresponding length transport blocks (TB) according to the estimated possible number of symbols N 1 , N 2 , N 3 , . . . , N K , and further according to the K transport blocks.
  • a medium access control protocol data unit (MAC PDU) of K corresponding lengths is generated.
  • Each MAC PDU can be carried by a corresponding transport block.
  • the user equipment may at least consider the number of allocated physical resource blocks (PRBs) P and the modulation and coding scheme (MCS) specified by the network device to determine a transport block length (TBS) corresponding to each number of symbols and corresponding The length of the MAC PDU.
  • PRBs physical resource blocks
  • MCS modulation and coding scheme
  • the user equipment can be configured into multiple Medium Access Control Protocol Sub Data Units (MAC SubPDUs), and then different MAC subPDUs are assembled into different lengths.
  • MAC SubPDU Medium Access Control Protocol Sub Data Units
  • FIG. 7 is a schematic diagram of MAC layer and PHY layer message interaction of the user equipment provided by the present application. As shown in FIG. 7, the MAC layer submits multiple MAC PDUs of different lengths to the PHY by physical The layer performs the transmission of the PDU and feeds back to the MAC layer which MAC PDUs are transmitted.
  • PHY Physical layer
  • the user equipment also generates a plurality of MAC subPDUs of different lengths in a MAC layer of a communication protocol stack, and delivers the generated multiple MAC subPDUs to the communication protocol stack.
  • PHY layer the user equipment also generates a plurality of MAC subPDUs of different lengths in a MAC layer of a communication protocol stack, and delivers the generated multiple MAC subPDUs to the communication protocol stack.
  • the user equipment may adopt different modulation and coding schemes (MCS) for different available PUSCH resources, and the modulation and coding scheme may be modulated and coded with the network device.
  • MCS modulation and coding schemes
  • S205 The user equipment performs channel competition.
  • the user equipment needs to first channel contention before sending the message, and wait until the channel is idle before starting to send the message.
  • the user equipment may use the Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) mechanism described in the IEEE (Institute of Electrical and Electronics Engineers) 802.11 standard to contend for the channel, or may The channel is contending with the Listen-Ahead (LBT) mechanism defined in the 3GPP LTE Release 14 standard, or the channel can be contending using the Listen-Ahead (LBT) mechanism defined in the MulteFire standard.
  • CSMA/CA Carrier Sense Multiple Access/Collision Avoidance
  • LBT Listen-Ahead
  • LBT Listen-Ahead
  • LBT Listen-Ahead
  • the method for competing for a channel of the user equipment is not limited in this application.
  • the operation of the user equipment to contend for the channel and the operation of the user equipment to generate multiple MAC subPDUs and multiple MAC PDUs may be performed in parallel, that is, S204 and S205 may be executed in parallel; That is, S204 can be executed first, and then S205 is executed.
  • the embodiment of the present application may not be limited to whether the S205 is performed at the MAC layer of the communication protocol stack of the user equipment or performed at the PHY layer.
  • the user equipment After the user equipment completes channel contention, the user equipment confirms from which symbol (or PUSCH symbol) can start sending a message to the network device, that is, after completing the channel contention, the user equipment knows that the user equipment is available.
  • the starting position of the PUSCH resource in the time domain for example, is symbol 0 or symbol 7.
  • the start position of the allocated PUSCH resource determined by the user equipment after completing the contention channel in the time domain is denoted by the symbol S.
  • the network device may specify a starting position of the allocated PUSCH resource in the time domain in the uplink scheduling information, for example, (1) the specified starting position may be a symbol 0. , either the symbol 1, or somewhere between the symbol 0 and the symbol 1. Alternatively, (2) the specified starting position may be symbol 7, or symbol 8, or somewhere between symbol 7 and symbol 8.
  • the network device may specify, in the uplink scheduling information, that the starting position of the allocated PUSCH resource in the time domain is the above situation (1) or may be the above situation (2), and then The user equipment decides whether it is case (1) or case (2) based on the result of the contention channel.
  • the user equipment may be based on the starting location S. And the end position E to determine the number of available PUSCH symbols. For example, if the start position S is the symbol 7 and the end position E is the symbol 12, the number of available PUSCH symbols is six.
  • the number of symbols available in the time domain of the allocated PUSCH resource determined by the user equipment is denoted as L.
  • the end position E may be determined by the user equipment, for example, the user equipment default end position E is a symbol 13.
  • the user equipment may not use the end position specified in the uplink scheduling information, but may move the end position backward.
  • FIG. 8 is the UE provided by the present application.
  • the end position specified in the uplink scheduling information is the symbol 10
  • the user equipment moves the end position to the symbol 13 (ie, the third message (for example, the user equipment sends the network device to the network device).
  • the end position of the data message is the symbol 13).
  • the network device needs to determine the end position of the third message according to the start position of the third message.
  • the network device can determine the end position of the third message according to the start position of the third message (which now becomes the symbol 7 after the contention channel) (the indicator now becomes the symbol 13).
  • the third message is a message carrying data transmitted to the network device, that is, a message transmitting a MAC PDU.
  • the network device indicates, in the uplink scheduling information (ie, uplink authorization), that the user equipment can move the end position backward (optionally, which may include indicating that a specific symbol can be moved), the user The device can move the end position backwards.
  • the user equipment will move the end position backwards only if the starting position that the user equipment contends is later than the desired or specified starting position of the network device, and the ending position can be moved backward.
  • the user equipment may move the end position to the last PUSCH symbol.
  • the network device may need to make multiple attempts and blind checks on the end position of the third message until the third is correctly parsed. As of the news.
  • the user equipment may determine a corresponding transport block length according to the number of available PUSCH symbols L, the number of the PRBs, and a coding and modulation scheme (MCS) indicated in the uplink scheduling information (transport block size (TBS) )). Then, the user equipment can select one of the plurality of MAC PDUs transmitted by the MAC layer to the PHY layer, which can be carried by the transport block.
  • MCS coding and modulation scheme
  • the user equipment uses MIMO technology to send two or more transport blocks (TBs) to the network device, the user equipment needs to determine each transport block length (TBS) separately, and the user equipment needs A MAC PDU that can be carried by each of the transport blocks is selected from a plurality of MAC PDUs that are passed to the physical layer by the MAC layer according to the determined length of each transport block.
  • TBS transport block length
  • the MAC layer is delivered to the PHY layer by a MAC sub PDU.
  • the user equipment needs to assemble MAC PDUs that can be carried by each transport block according to the determined one or more transport block lengths.
  • the operation of determining the number of available PUSCH symbols may be done at the MAC layer or the PHY layer of the communication protocol stack of the user equipment.
  • the specific operation of determining one or more transport block lengths (TBSs) based on the determined number of available PUSCH symbols may be done at the MAC layer or the PHY layer of the communication protocol stack of the user equipment.
  • the operation of selecting one or more MAC PDUs according to the determined one or more transport block lengths may be performed at a MAC layer or a PHY layer of a communication protocol stack of the user equipment.
  • the operations of assembling one or more MAC PDUs according to the determined one or more transport block lengths may be performed at a MAC layer or a PHY layer of a communication protocol stack of the user equipment.
  • the embodiment of the present invention may not be limited to whether the S206 is performed at the MAC layer or the PHY layer of the communication protocol stack of the user equipment.
  • the operation of determining the number of available PUSCH symbols, the operation of the transport block length (TBS), and the operation of selecting the MAC PDU may be performed at the PHY layer of the communication protocol stack of the user equipment.
  • S207 The user equipment sends a third message to the network device.
  • the user equipment sends the selected or assembled one or more MAC PDUs in S206 to the network device.
  • the PHY layer of the communication protocol stack of the user equipment needs to feed back to the MAC layer of the communication protocol stack of the user equipment, which MAC PDU is transmitted, such as The example shown in Fig. 7.
  • the PHY layer of the communication protocol stack of the user equipment needs to be sent to the user equipment
  • the MAC layer feedback of the communication protocol stack of the device is which two or several MAC PDUs are transmitted.
  • the PHY layer feeds back to the MAC layer which MAC packet or packets are transmitted out for the convenience of the MAC layer to manage and update the MAC layer buffer status information.
  • the user equipment receives an ACK or a NACK sent by the network device.
  • the network device After the network device receives the third message, if the network device correctly receives the third message, the network device sends an Acknowledgement (ACK) message to the user equipment; if the network device finds the reception If the third message arrives has an error (for example, the frame check fails), the network device sends a Negative Acknowledgement (NACK) message to the user equipment.
  • ACK Acknowledgement
  • NACK Negative Acknowledgement
  • the network device when receiving the third message sent by the user equipment, the network device needs to determine a starting position and an ending position of the third message in the time domain.
  • the network device may determine a start position of the third message according to a PUSCH resource starting position specified in the uplink scheduling information sent by the network device to the user equipment.
  • the network device may determine a start position of the third message according to a Demodulation Reference Signal (DMRS) sent by the user equipment.
  • DMRS Demodulation Reference Signal
  • the network device may try every possible starting position (eg, symbol 0, symbol 1, symbol 2, ..., symbol 13) until the network device correctly parses the first Three news so far.
  • the network device may determine an end position of the third message according to a PUSCH resource starting position specified in the uplink scheduling information sent by the network device to the user equipment.
  • the network device may determine an end position of the third message according to the DMRS sent by the user equipment.
  • the network device may default to the end position of the third message as symbol 13.
  • the network device may determine an end position of the third message according to a start position of the third message. For example, if the start position of the third message is symbol 0, the end position of the third message is symbol 6; if the start position of the third message is symbol 7, the end position of the third message Is the symbol 13.
  • the user equipment may not use the end position specified in the uplink scheduling information, but move the end position backward.
  • the end position specified in the uplink scheduling information is Symbol 10
  • the user equipment moves the end position to symbol 13 (i.e., the end position of the third message is symbol 13).
  • the network device needs to determine the end position of the third message according to the start position of the third message. For example, if the starting position specified in the uplink scheduling information is symbol 0, the ending position is symbol 10; and the result of the user equipment competing for the channel is that the starting position of the uplink transmission is symbol 7, the user equipment can backward the ending position. Move to symbol 13.
  • the network device may determine an end position of the third message (after being adjusted to become a symbol 13) according to a start position of the third message (the symbol 7 becomes a symbol 7).
  • the user equipment may determine the number of available PUSCH symbols and determine the TBS according to the result of the contention channel, and may not change the modulation and coding scheme specified by the network device, and use the MCS specified by the network device to ensure the reliability of the uplink transmission. And reduce the number of retransmissions, which can improve resource utilization efficiency.
  • the user equipment generates multiple MAC PDUs of different lengths. After the user equipment completes the channel competition, the user equipment can determine the transport block length and select the corresponding MAC PDU according to the number of available PUSCH symbols, and enable the user equipment according to the channel. The result of the competition is used to temporarily determine the length of the transport block.
  • the user equipment may reselect the transport block length and the MAC PDU without significantly affecting the instantaneous transmission rate of the user equipment and the reliability of the uplink transmission.
  • the user equipment may adjust the end position of the PUSCH resource according to the result of the contention channel.
  • the user equipment may use the available PUSCH symbols to send a message to the network device as much as possible to ensure the reliability of the uplink transmission and reduce the probability of retransmission. .
  • FIG. 9 is a schematic structural diagram of Embodiment 1 of a user equipment provided by the present application. As shown in FIG. 9, the user equipment 10 includes:
  • the receiving module 11 is configured to receive uplink scheduling information that is sent by the network device, where the uplink scheduling information includes information about a PUSCH resource allocated by the network device to the user equipment;
  • the processing module 12 is configured to:
  • the sending module 13 is configured to send, according to the at least one transport block length, a corresponding at least one MAC PDU from the multiple MAC PDUs to the network device;
  • the receiving module 11 is further configured to receive an acknowledgement ACK message or a negative acknowledgement NACK message sent by the network device.
  • the user equipment provided in this embodiment is used to implement the technical solution on the user equipment side in any of the foregoing embodiments, and the principles and technical effects are not described herein.
  • the processing module 12 is specifically configured to:
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the end position of the allocated PUSCH resource determined by the processing module 12 is one or more symbols later than the end position of the allocated PUSCH resource indicated in the uplink scheduling information.
  • the uplink scheduling information includes: the number of PRBs allocated by the network device to the user equipment, and the MCS, where the processing module 12 is further configured to:
  • the PUSCH resource symbol includes any one of the following symbols:
  • the physical layer PHY of the user equipment feeds back information of the at least one MAC PDU sent to the network device to the user equipment MAC layer.
  • the receiving module 11 is further configured to receive, by the network device, a message that is used to trigger an uplink transmission of the user equipment or trigger the user equipment to start a contention channel.
  • the user equipment provided by any of the foregoing embodiments is used to implement the technical solution of the user equipment side in any of the foregoing embodiments, and the implementation principle and technical effects thereof are not described herein.
  • FIG. 10 is a schematic structural diagram of Embodiment 1 of a network device according to the present application. As shown in FIG. 10, the network device 20 includes:
  • the sending module 21 is configured to send uplink scheduling information to the user equipment, where the uplink scheduling information includes information about a physical uplink shared channel PUSCH resource allocated by the network device to the user equipment;
  • the receiving module 22 is configured to receive, on the PUSCH resource, at least one MAC PDU sent by the user equipment;
  • the sending module 22 is further configured to send an acknowledgement ACK message or a negative acknowledgement NACK message to the user equipment.
  • the network device provided in this embodiment is used to implement the technical solution on the network device side in any of the foregoing embodiments, and the implementation principle and technical effects thereof are not described herein.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the network device further includes:
  • the processing module 23 is configured to determine a start location and an end location of the at least one MAC PDU in a time domain;
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information further includes: a number of PRBs allocated by the network device to the user equipment, and an MCS.
  • the symbol of the PUSCH resource includes any one of the following symbols:
  • the sending module 21 is further configured to send, to the user equipment, a message for triggering uplink transmission of the user equipment or triggering the user equipment to start a contention channel.
  • the network device provided by any of the foregoing embodiments is used to implement the technical solution of the network device side in any of the foregoing embodiments, and the implementation principle and technical effects thereof are not described herein.
  • the user equipment provided by the present application includes at least a memory, a processor, a transceiver, and an antenna.
  • the transceiver can also be implemented by a receiver (also known as a receiver) and a transmitter (also known as a transmitter), or a transmitter, in a specific implementation of the user equipment:
  • a receiver configured to receive uplink scheduling information sent by the network device, where the uplink scheduling information includes information about a PUSCH resource allocated by the network device to the user equipment;
  • a transmitter configured to send, according to the at least one transport block length, a corresponding at least one MAC PDU from the plurality of MAC PDUs to be sent to the network device;
  • the receiver is further configured to receive an ACK message or a NACK message sent by the network device.
  • the processor is specifically configured to:
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the end position of the allocated PUSCH resource determined by the processor is one or more symbols later than an end position of the allocated PUSCH resource indicated in the uplink scheduling information.
  • the uplink scheduling information includes: a number of PRBs that are allocated by the network device to the user equipment, and an MCS, where the processor is further configured to:
  • the PUSCH resource symbol includes any one of the following symbols:
  • the PHY of the user equipment feeds back information of at least one MAC PDU sent to the network device to the user equipment MAC layer.
  • the receiver is further configured to receive a message that is sent by the network device to trigger an uplink transmission of the user equipment or trigger the user equipment to start a contention channel.
  • the number of processors is at least one, and is used to execute an execution instruction of the memory storage, that is, a computer program.
  • the user equipment performs data interaction with the network device through the communication interface to perform the data transmission method on the unlicensed spectrum provided by the various embodiments described above.
  • the memory may also be integrated inside the processor.
  • the network device provided by the present application includes at least a memory, a processor, a transceiver, and an antenna.
  • the transceiver can also be implemented by a receiver (also known as a receiver) and a transmitter (also known as a transmitter), or by a transmitter, in a specific implementation of the network device:
  • a transmitter configured to send, to the user equipment, uplink scheduling information, where the uplink scheduling information includes information about a PUSCH resource allocated by the network device to the user equipment;
  • a receiver configured to receive, on the PUSCH resource, at least one MAC PDU sent by the user equipment
  • the transmitter is further configured to send an ACK message or a NACK message to the user equipment.
  • the uplink scheduling information includes at least one of the following information:
  • the network device specifies an MCS for the user equipment
  • the network device is a TBS specified by the user equipment.
  • the network device further includes:
  • a processor configured to determine a start position and an end position of the at least one MAC PDU in a time domain
  • the start location refers to the first symbol that the user equipment sends data to the network device
  • the end location refers to the last symbol that the user equipment sends data to the network device.
  • the uplink scheduling information further includes: a number of PRBs allocated by the network device to the user equipment, and a modulation and coding scheme MCS.
  • the symbol of the PUSCH resource includes any one of the following symbols:
  • the sender is further configured to send, to the user equipment, a message for triggering uplink transmission of the user equipment or triggering the user equipment to start a contention channel.
  • the number of processors is at least one, and is used to execute an execution instruction of the memory storage, that is, a computer program.
  • the data transmission method on the unlicensed spectrum provided by the foregoing various embodiments is performed by the network device by performing data interaction between the network device and the user equipment.
  • the memory may be integrated in the processor.
  • the present application also provides a user equipment, including: a memory, a processor, a transmitter, a receiver, and a computer program, the computer program being stored in the memory, the processor running the computer program to execute the foregoing method embodiment A method of data transmission on an unlicensed spectrum provided.
  • the application also provides a network device comprising: a memory, a processor, a transmitter, a receiver, and a computer program, the computer program being stored in the memory, the processor running the computer program to perform any of the foregoing methods
  • a network device comprising: a memory, a processor, a transmitter, a receiver, and a computer program, the computer program being stored in the memory, the processor running the computer program to perform any of the foregoing methods.
  • the present application further provides a storage medium for storing a computer program for implementing a data transmission method on an unlicensed spectrum provided by any of the foregoing method embodiments.
  • the present application further provides a storage medium for storing a computer program for implementing a data transmission method on an unlicensed spectrum provided by any of the foregoing method embodiments.
  • the application also provides a program product comprising a computer program (ie, an execution instruction) stored in a readable storage medium.
  • a computer program ie, an execution instruction
  • At least one processor of the user device can read the computer program from a readable storage medium, and the at least one processor executes the computer program such that the user device implements a data transmission method on an unlicensed spectrum provided by various embodiments.
  • the application also provides a program product comprising a computer program (ie, an execution instruction) stored in a readable storage medium.
  • a computer program ie, an execution instruction
  • At least one processor of the network device can read the computer program from a readable storage medium, and the at least one processor executes the computer program to cause the network device to implement the data transmission method on the unlicensed spectrum provided by the various embodiments described above.
  • the processor may be a central processing unit (English: Central Processing Unit, CPU for short), or other general-purpose processor, digital signal processor (English: Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in connection with the present application may be directly embodied by hardware processor execution or by a combination of hardware and software modules in a processor.
  • All or part of the steps of implementing the above method embodiments may be performed by hardware associated with the program instructions.
  • the aforementioned program can be stored in a readable memory.
  • the steps including the foregoing method embodiments are performed; and the foregoing memory (storage medium) includes: read-only memory (English: read-only memory, abbreviation: ROM), RAM, flash memory, hard disk, Solid state drive, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.

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Abstract

La présente invention concerne un procédé et un dispositif de transmission de données sur un spectre sans licence, et un support d'informations. Le procédé comprend : un équipement utilisateur qui reçoit des informations de planification de liaison montante envoyées par un dispositif de réseau et contenant des informations de ressources PUSCH, détermine le nombre de symboles de ressources PUSCH disponibles en fonction des informations de planification de liaison montante, détermine tous les TBS disponibles, et génère des PDU MAC pouvant être prises en charge par chaque bloc de transmission ; et l'équipement utilisateur qui effectue une contention de canaux, détermine une longueur de bloc de transmission à utiliser en fonction du résultat de contention et du nombre de symboles de ressources PUSCH disponibles, sélectionne au moins une PDU MAC parmi de multiples PDU MAC en fonction de la longueur de bloc de transmission, envoie ladite PDU MAC au dispositif de réseau, et reçoit un message de rétroaction. L'équipement utilisateur détermine le nombre de symboles de ressources PUSCH disponibles et les TBS en fonction du résultat de contention de canaux ; un MCS spécifié par le dispositif de réseau n'est pas changé, la fiabilité de la transmission en liaison montante est garantie, le nombre de retransmissions est réduit, et l'efficacité d'utilisation de ressources peut également être améliorée.
PCT/CN2018/119350 2017-12-06 2018-12-05 Procédé et dispositif de transmission de données sur un spectre sans licence, et support d'informations WO2019109945A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201711279068.8 2017-12-06
CN201711279068 2017-12-06
CN201810118372.2 2018-02-06
CN201810118372.2A CN109890076B (zh) 2017-12-06 2018-02-06 一种非授权频谱上的数据传输方法、设备和存储介质

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