WO2022188638A1 - 一种数据传输方法及装置 - Google Patents

一种数据传输方法及装置 Download PDF

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Publication number
WO2022188638A1
WO2022188638A1 PCT/CN2022/077880 CN2022077880W WO2022188638A1 WO 2022188638 A1 WO2022188638 A1 WO 2022188638A1 CN 2022077880 W CN2022077880 W CN 2022077880W WO 2022188638 A1 WO2022188638 A1 WO 2022188638A1
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WIPO (PCT)
Prior art keywords
time
frequency domain
domain resource
time unit
information
Prior art date
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Ceased
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PCT/CN2022/077880
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English (en)
French (fr)
Inventor
侯海龙
金哲
罗之虎
曲韦霖
余政
铁晓磊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP22766164.2A priority Critical patent/EP4301069A4/en
Publication of WO2022188638A1 publication Critical patent/WO2022188638A1/zh
Priority to US18/464,806 priority patent/US20230422231A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a data transmission method and apparatus.
  • a BWP is a segment of contiguous frequency resources on a carrier.
  • a terminal device can be configured with one or more BWPs in a serving cell, but only one uplink BWP and one downlink BWP can be activated at the same time, and the terminal device can only perform data transmission on the activated BWP.
  • the NR system supports BWP handover.
  • the network device can send downlink control information (DCI) to the terminal device, so as to instruct the terminal device to perform BWP handover through DCI; for example, the network device can send the radio resource control (radio resource control, RRC) signaling, thereby instructing the terminal device to perform BWP handover through RRC signaling.
  • DCI downlink control information
  • RRC radio resource control
  • the network device instructs the terminal device to perform BWP handover through the DCI that schedules the physical downlink shared channel (PDSCH) or physical uplink shared channel (physical uplink shared channel, PUSCH) data transmission. That is to say, when the network device instructs the terminal device to perform BWP switching through DCI, it will schedule the transmission of a PDSCH or PUSCH.
  • the scheduled data transmission needs to be transmitted on the switched BWP.
  • the terminal device receives the DCI and the scheduled data. Before the transmission, a BWP handover procedure takes place, and no data transmission or reception takes place during the BWP handover procedure.
  • the terminal device cannot perform data transmission during the BWP handover process, thereby affecting the data throughput rate of the terminal device.
  • the purpose of the present application is to provide a data transmission method and apparatus, which are used to reduce the impact of frequency domain resource switching on data transmission of a terminal device, and to improve the data throughput rate of the terminal device.
  • the present application provides a data transmission method, which is suitable for a scenario where a network device configures multiple frequency domain resources for a terminal device.
  • the execution body of the method is a terminal device or a module in the terminal device, and the description is made by taking the terminal device as the execution body as an example.
  • the method includes: receiving first information from a network device in a first frequency domain resource, the first information indicating switching to a second frequency domain resource; and determining a first time unit according to the first information, wherein the first time unit includes a first time unit. Two time units; switching from the first frequency domain resource to the second frequency domain resource in the second time unit, and switching between the first frequency domain resource and/or Data transmission is performed on the second frequency domain resource.
  • the terminal device can perform data transmission at the time other than the frequency domain resource switching in the first time unit, thereby improving the data throughput rate of data transmission, reducing the data transmission delay, and reducing the impact of frequency domain resource switching on data. effects of transmission. At the same time, it can also achieve faster handover before different frequency domain resources to obtain higher frequency diversity or selective scheduling gain, faster load balancing effect, and faster high-priority service avoidance.
  • performing data transmission through the first frequency domain resource and/or the second frequency domain resource in the first time unit includes: from the start time of the first time unit to the second time unit Between the start time of the first time unit, data transmission is performed on the first frequency domain resource; and/or, between the end time of the second time unit and the end time of the first time unit, data transmission is performed on the second frequency domain resource.
  • data transmission is performed on the first frequency domain resource and/or the second frequency domain resource respectively according to the switching position of the frequency domain resource, so that the first frequency domain resource and/or the second frequency domain resource can be fully utilized. resources and improve resource utilization.
  • the start time of the first time unit is located after the time of receiving the first information
  • the first information also indicates at least one of a length of the first time unit, a start time, and an end time.
  • the network device and the terminal device have the same understanding of the first time unit, thereby avoiding interference to the data transmitted in the second frequency domain resource.
  • the method further includes: receiving second information from the network device, the second information indicates that data is to be transmitted in the second frequency domain resource at a specified time, and the second information and the first information are included in the same in a message;
  • the end time of the first time unit is the designated time indicated by the second information.
  • the network device By using the data transmission time indicated in the second frequency domain resource as the end time of the first time unit, it is beneficial for the network device to perform data scheduling on the terminal device in the second frequency domain resource and avoid data transmission conflicts.
  • the method further includes: receiving third information from the network device, where the third information indicates that the first frequency domain resource and/or The second frequency domain resource is transmitted.
  • the network device can flexibly instruct the terminal device whether to perform data transmission in the first time unit except the second time unit and how to perform data transmission, which increases the flexibility of network scheduling and ensures that users performance of data transfer.
  • the method further includes: the position of the second time unit in the first time unit is indicated by the network device; or, the position of the second time unit in the first time unit is preset.
  • the start time of the first time unit and the start time of the second time unit overlap, or the end time of the first time unit and the end time of the second time unit overlap.
  • the terminal device can perform frequency domain resource switching in time, so that the data with higher priority transmitted in the first frequency domain resource can be urgently avoided, and at the same time. Faster load balancing can be achieved, and higher frequency diversity or selective scheduling gain can be obtained.
  • the terminal device can analyze the first information while preparing the parameters required for frequency domain switching. , reducing the demand for the ability of the terminal to prepare the handover process more quickly, which is beneficial to reducing the complexity and power consumption of the terminal.
  • the index values of the first frequency domain resource and the second frequency domain resource are different, or the index values of the first frequency domain resource and the second frequency domain resource are the same, but the frequency domain positions are different.
  • the present application provides a data transmission method, which is suitable for a scenario where a network device configures multiple frequency domain resources for a terminal device.
  • the execution body of the method is a network device or a module in the network device, and the description is made by taking the network device as the execution body as an example.
  • the method includes: sending first information to the terminal device in the first frequency domain resource, the first information indicating switching to the second frequency domain resource; in the first time unit except the second time unit, in the first time unit Data transmission is performed on frequency domain resources and/or second frequency domain resources; wherein the first information indicates a first time unit, the first time unit includes a second time unit, and the second time unit is used for switching from the first frequency domain resource to the second frequency domain resource.
  • performing data transmission through the first frequency domain resource and/or the second frequency domain resource in the first time unit includes: from the start time of the first time unit to the second time unit Between the start time of the first time unit, data transmission is performed on the first frequency domain resource; and/or, between the end time of the second time unit and the end time of the first time unit, data transmission is performed on the second frequency domain resource.
  • the start time of the first time unit is located after the time of receiving the first information
  • the first information also indicates at least one of a length of the first time unit, a start time, and an end time.
  • the method further includes: sending second information to the terminal device, the second information indicates that data is to be transmitted in the second frequency domain resource at a specified time, and the second information and the first information are included in the same article In the message; the end time of the first time unit is the designated time indicated by the second information.
  • the method further includes: sending third information to the terminal device, where the third information indicates that the first frequency domain resource and/or the Two frequency domain resources for transmission.
  • the method further includes: the position of the second time unit in the first time unit is indicated by the network device; or, the position of the second time unit in the first time unit is preset.
  • the start time of the first time unit and the start time of the second time unit overlap, or the end time of the first time unit and the end time of the second time unit overlap.
  • the index values of the first frequency domain resource and the second frequency domain resource are different, or the index values of the first frequency domain resource and the second frequency domain resource are the same, but the frequency domain positions are different.
  • the present application provides a data transmission method, which is suitable for a scenario where a network device configures multiple frequency domain resources for a terminal device.
  • the execution body of the method is a terminal device or a module in the terminal device, and the description is made by taking the terminal device as the execution body as an example.
  • the method includes: receiving control information from a network device in a first frequency domain resource, the control information indicating data transmission in a second frequency domain resource, and indicating a start time of data transmission; switching to the second frequency domain according to the control information resource, and perform data transmission in the second frequency domain resource; wherein, the time slot where the control information is located and the time slot where the terminal equipment completes the frequency domain resource switching according to the control information are the same time slot, and the terminal equipment completes the frequency domain resource switching.
  • the time is the end time (or tail boundary) of the slot.
  • the time when the terminal device receives the control information to the end time of the time slot in which the control information is received can be equal to the frequency domain resource switching delay required by the terminal device, so that when the terminal device receives the control information in one time slot, The frequency domain resource switching is performed immediately, and the time when the switching is completed is exactly the end time of the time slot, which can avoid the frequency domain resource switching spanning multiple time slots, so as to ensure that there is a complete time slot in the next time slot of the time slot.
  • the slot can be used for data transmission. Since the terminal device transmits data according to the granularity of the time slot, it is beneficial to the realization of signal reception and detection of the terminal device.
  • the end moment of the frequency domain resource switching coincides with the start moment of the data transmission indicated by the control information.
  • the time duration between the end moment of receiving the control information and the start moment of the third time unit is equal to the frequency domain resource switching delay required for frequency domain resource switching.
  • the present application provides a data transmission method, which is suitable for a scenario where a network device configures multiple frequency domain resources for a terminal device.
  • the execution body of the method is a network device or a module in the network device, and the description is made by taking the network device as the execution body as an example.
  • the method includes: sending control information to the terminal equipment in the first frequency domain resource, the control information indicating data transmission in the second frequency domain resource, and indicating the start time of the data transmission; Data transmission; wherein, the time slot where the control information is located and the time slot where the terminal device completes the frequency domain resource switching according to the control information are the same time slot, and the moment when the terminal device completes the frequency domain resource switching is the end time of the time slot (or called the tail boundary).
  • the end moment of the frequency domain resource switching coincides with the start moment of the data transmission indicated by the control information.
  • the time duration between the end moment of receiving the control information and the start moment of the third time unit is equal to the frequency domain resource switching delay required for frequency domain resource switching.
  • the present application further provides a communication device having any of the methods provided in the first or third aspects above.
  • the communication device may be implemented by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the communication apparatus includes: a processor, and the processor is configured to support the communication apparatus to perform the corresponding functions of the terminal device in the above-described method.
  • the communication device may also include a memory, which may be coupled to the processor, which holds program instructions and data necessary for the communication device.
  • the communication apparatus further includes a communication interface, where the communication interface is used to support communication between the communication apparatus and devices such as network equipment.
  • the communication device includes corresponding functional modules, which are respectively used to implement the steps in the above method.
  • the functions can be implemented by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication apparatus includes a processing unit and a communication unit, and these units can perform the corresponding functions in the above method examples.
  • these units can perform the corresponding functions in the above method examples.
  • the present application further provides a communication device having any of the methods provided in the second or fourth aspects above.
  • the communication device may be implemented by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the communication apparatus includes: a processor configured to support the communication apparatus to perform the corresponding functions of the network device in the method shown above.
  • the communication device may also include a memory, which may be coupled to the processor, which holds program instructions and data necessary for the communication device.
  • the communication apparatus further includes a communication interface, where the communication interface is used to support communication between the communication apparatus and equipment such as terminal equipment.
  • the communication device includes corresponding functional modules, which are respectively used to implement the steps in the above method.
  • the functions can be implemented by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication apparatus includes a processing unit and a communication unit, and these units can perform the corresponding functions in the above method examples.
  • these units can perform the corresponding functions in the above method examples.
  • a communication device comprising a processor and an interface circuit, the interface circuit is configured to receive signals from other communication devices other than the communication device and transmit to the processor or send signals from the processor
  • the processor is used to implement the method in the foregoing first aspect or any possible implementation manner of the first aspect through logic circuits or executing code instructions.
  • a communication device comprising a processor and an interface circuit
  • the interface circuit is configured to receive signals from other communication devices other than the communication device and transmit to the processor or send signals from the processor
  • the processor is used to implement the functional modules of the method in the second aspect and any possible implementation manner of the second aspect through logic circuits or executing code instructions.
  • a communication device comprising a processor and an interface circuit, the interface circuit is configured to receive signals from other communication devices other than the communication device and transmit to the processor or send signals from the processor
  • the processor is used to implement the functional modules of the third aspect and the method in any possible implementation manner of the third aspect through logic circuits or executing code instructions.
  • a tenth aspect provides a communication device, comprising a processor and an interface circuit, the interface circuit is configured to receive signals from other communication devices other than the communication device and transmit to the processor or send signals from the processor
  • the processor is used to implement the functional modules of the method in the fourth aspect and any possible implementation manner of the fourth aspect through logic circuits or executing code instructions.
  • a computer-readable storage medium is provided, and a computer program or instruction is stored in the computer-readable storage medium.
  • the computer program or instruction is executed by a processor, the aforementioned first to fourth aspects are realized A method in any aspect, and any possible implementation of any aspect.
  • a twelfth aspect provides a computer program product comprising instructions that, when executed by a processor, implement any of the foregoing first to fourth aspects, and any possible implementation manner of any of the aspects. Methods.
  • a thirteenth aspect provides a chip system, the chip system includes a processor, and may further include a memory, for implementing any one of the foregoing first to fourth aspects, and any possible implementation manner of any aspect. Methods.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • a fourteenth aspect provides a communication system, where the system includes the apparatus (eg, terminal equipment) described in the seventh aspect and the apparatus (eg, network equipment) described in the eighth aspect.
  • the apparatus eg, terminal equipment
  • the apparatus eg, network equipment
  • a fifteenth aspect provides a communication system, where the system includes the apparatus (eg, network device) described in the ninth aspect and the apparatus (eg, terminal device) described in the tenth aspect.
  • the apparatus eg, network device
  • the apparatus eg, terminal device
  • FIG. 1 is a schematic diagram of a network architecture applicable to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a scheduling delay provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of data transmission provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a positional relationship between a first time unit and a second time unit according to an embodiment of the present application
  • FIG. 6 is a schematic diagram of a positional relationship between a first time unit and a second time unit according to an embodiment of the present application
  • FIG. 7 is a schematic diagram of a positional relationship between a first time unit and a second time unit according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a data transmission method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a frequency domain resource switching provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a frequency domain resource switching provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • NR NR systems
  • the terminal device may be a device with wireless transceiver function, which may be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it may also be deployed on water (such as ships, etc.); or Deployed in the air (eg on airplanes, balloons, satellites, etc.).
  • the terminal device may be a user equipment (user equipment, UE), wherein the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with a wireless communication function.
  • the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • the terminal device may also be a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, and the like.
  • the device for realizing the function of the terminal device may also be a device capable of supporting the terminal device to realize the function, such as a chip system, the device may be installed in the terminal, the chip system may be composed of chips, or Including chips and other discrete devices.
  • the terminal device in this application may be a first-type terminal device or a second-type terminal device, and the first-type terminal device and the second-type terminal device may have at least one of the following distinguishing features:
  • the bandwidth capabilities are different. For example, the bandwidth supported by the first type of terminal equipment is smaller than the bandwidth supported by the second type of terminal equipment.
  • the number of transceiver antennas is different. For example, the number of transceiver antennas supported by the first type of terminal equipment is smaller than the number of transceiver antennas supported by the second type of terminal equipment.
  • the maximum uplink transmit power is different.
  • the maximum uplink transmit power supported by the terminal equipment of the first type is smaller than the maximum transmit power supported by the terminal equipment of the second type.
  • the terminal device of the first type may be a terminal device in NR release 17 (release-17, Rel-17) or a later version of NR Rel-17.
  • the second type of terminal device may be, for example, a terminal device in NR release 15 (release-15, Rel-15) or NR release 16 (release-16, Rel-16).
  • the second type of terminal equipment may also be referred to as NR legacy (NR legacy) terminal equipment.
  • the minimum delay between receiving downlink data and sending feedback on the downlink data by the first type terminal equipment is greater than the minimum delay between receiving the downlink data and sending feedback on the downlink data by the second type terminal equipment; and/ Or, the minimum delay between sending uplink data and receiving feedback on the uplink data by the first type terminal equipment is greater than the minimum delay between sending uplink data and receiving feedback on the uplink data by the second type terminal equipment.
  • the first type of terminal device may refer to a reduced capability (reduced capability, REDCAP) terminal device, or the first type of terminal device may also refer to a low-capability terminal device, a reduced capability terminal device, a REDCAP UE , Reduced Capacity UE, narrow-band NR (narrow-band NR, NB-NR) UE, etc.
  • the second type of terminal equipment may refer to traditional or normal or high-capability terminal equipment, and may also be referred to as legacy (legacy) terminal equipment or normal (normal) terminal equipment.
  • legacy (legacy) terminal equipment or normal (normal) terminal equipment may also be referred to as legacy (legacy) terminal equipment or normal (normal) terminal equipment.
  • the second type of terminal equipment and the first type of terminal equipment have But not limited to the above-mentioned distinguishing features.
  • the network device may be a wireless access device under various standards, for example, it may be a next-generation base station (next Generation node B, gNB) in an NR system, or an evolved Node B (evolved Node B, eNB), radio network controller (RNC) or Node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (such as , home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless fidelity (wireless fidelity, WIFI) system in the access point (access point, AP), wireless relay node, wireless
  • the backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP), etc. can also be a gNB or transmission point (TRP or TP) in the NR system, one or a group of base stations in the 5G system (including Multiple antenna panels) Antenna panels, alternatively,
  • FIG. 1 shows a schematic diagram of a communication system suitable for this embodiment of the present application.
  • the base station and terminal equipment 1 to terminal equipment 6 form a communication system.
  • the base station sends information to one or more terminal equipment among terminal equipment 1 to terminal equipment 6 .
  • the terminal device 4 to the terminal device 6 also form a communication system.
  • the terminal device 5 can send information to one or more of the terminal device 4 and the terminal device 6 .
  • the network device may configure multiple uplink BWPs and downlink BWPs on each carrier for the terminal device, which are used for uplink transmission and downlink transmission, respectively.
  • each terminal can only activate one BWP at the same time, and the terminal can only perform data transmission on the activated BWP.
  • the terminal device may switch from one BWP to another BWP.
  • BWP switching there are three main ways of BWP switching:
  • Implementation mode 1 BWP handover based on RRC signaling.
  • the BWP handover based on the RRC signaling means that the network device instructs the terminal device to perform the BWP handover through the RRC signaling.
  • the BWP handover based on RRC signaling is mainly used to make the terminal device work in a new BWP after the RRC reconfiguration message is issued or the secondary carrier is activated.
  • the BWP handover based on RRC signaling enables the terminal device to immediately enter the appropriate BWP for data transmission after RRC reconfiguration or activation of the secondary carrier, instead of staying on the initial BWP.
  • Implementation mode 2 DCI-based BWP handover.
  • DCI-based BWP handover means that the network device instructs the terminal device to perform BWP handover through the DCI, the DCI simultaneously schedules the terminal device to perform PDSCH or PUSCH data transmission, and the data transmission scheduled by the DCI requires the BWP index (index) carried in the DCI. ) on the corresponding BWP.
  • the terminal device determines that the BWP index in the DCI is different from the index of the BWP that receives the DCI, the terminal device switches to the BWP corresponding to the BWP index carried in the DCI.
  • Implementation mode 3 timer-based BWP handover.
  • the network side may configure a BWP inactivity timer (bwp-inactivitytimer).
  • the BWP inactivation timer can be started. If the BWP inactivation timer of the terminal device in the current BWP expires and the terminal device has no data to transmit, it can switch to a BWP with a smaller bandwidth, such as switching to the default BWP (default BWP), so that energy saving can be achieved.
  • a terminal device needs a certain delay to perform BWP handover.
  • BWP handover two different types of BWP handover delays are defined in the NR system according to different terminal device capabilities, as shown in Table 1. Show.
  • ⁇ is a parameter corresponding to the subcarrier spacing in which the terminal equipment works, that is, the subcarrier spacing in which the terminal equipment works is 2 ⁇ ⁇ 15kHz.
  • the terminal device may report to the network device whether the BWP handover capability it supports is type 1 or type 2.
  • the terminal device needs to decode the received DCI, reload the configuration parameter information of the BWP after the handover, and also needs to adjust the radio frequency channel according to the configuration parameters of the BWP after the handover. Therefore, Within the BWP switching delay T BWPswitchDelay , the terminal equipment is not required to perform data transmission. It should be noted that, at present, the time delay required by each of the above three processes is not specifically distinguished, and only a total BWP handover time delay is defined for the entire BWP handover process.
  • the delay between the data transmission scheduled by DCI and the moment of DCI transmission can be called the scheduling delay, and the scheduling delay cannot be smaller than the BWP handover delay.
  • the terminal device receives DCI through PDCCH in BWP1, and the DCI instructs the terminal device to receive PDSCH through BWP 2 in time slot n+2.
  • the subcarrier intervals of BWP1 and BWP2 are both 15 kHz, and the BWP switching capability supported by the terminal device is Type 1, then in this example, the BWP switching delay is 1 timeslot, and the scheduling delay is 2 timeslots.
  • the embodiment of the present application provides a method, which can improve the data transmission efficiency and the data throughput rate.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application.
  • the evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the interaction between a network device and a terminal device is used as an example for description.
  • the operations performed by the network device may also be performed by a chip or module inside the network device, and the operations performed by the terminal device may also be performed by a chip inside the terminal device. or module execution.
  • FIG. 3 a schematic flowchart of a data transmission method provided by an embodiment of the present application is shown.
  • the method includes:
  • S301 The network device sends the first information to the terminal device in the first frequency domain resource.
  • S302 The terminal device receives the first information from the network device in the first frequency domain resource.
  • the first information may instruct the terminal device to switch to the second frequency domain resource. It should be noted that the first information may not directly instruct the terminal device to perform handover, and the first information may include the second identifier of the second frequency domain resource. When the terminal device determines the first identifier of the first frequency domain resource and the first information When the included second identifiers are different, it may be determined that switching to the second frequency domain resource corresponding to the second identifier is required.
  • the first information may be sent to the terminal device through DCI or RRC signaling, or a medium access control (medium access control, MAC) control element (control element, CE) or a system broadcast message.
  • MAC medium access control
  • CE control element
  • the network device may also send second information to the terminal device, where the second information instructs the terminal device to transmit data in the second frequency domain resource at a specified time after switching to the second frequency domain resource.
  • the second information may instruct the terminal device to receive data in the PDSCH of the second frequency domain resource, or may instruct the terminal device to send data in the PUSCH of the second frequency domain resource.
  • first information and the second information may be carried in one message, for example, both are carried in one DCI, or may be carried in two messages, for example, in two DCIs, which is not limited in this application.
  • the frequency domain resource may refer to a continuous frequency resource, for example, may refer to a BWP, or a frequency domain resource similar to a BWP.
  • the frequency domain resource refers to BWP
  • switching from the first frequency domain resource to the second frequency domain resource can be called BWP switching in addition to BWP switching.
  • the configuration parameters corresponding to the first frequency domain resource and the second frequency domain resource are different by at least one of the following, it can be considered that the two frequency domain resources are different:
  • the index value of the first frequency domain resource is different from the index value of the second frequency domain resource
  • the frequency domain position of the first frequency domain resource is different from the frequency domain position of the second frequency domain resource
  • the center frequency point corresponding to the first frequency domain resource and the center frequency point corresponding to the second frequency domain resource are different;
  • the subcarrier spacing (SCS) corresponding to the first frequency domain resource is different from the SCS corresponding to the second frequency domain resource;
  • the number of multiple input multiple output (MIMO) data transmission layers or the number of antennas corresponding to the first frequency domain resource is different from the number of MIMO data transmission layers or the number of antennas corresponding to the second frequency domain resource;
  • the physical channel configuration corresponding to the first frequency domain resource is different from the physical channel configuration corresponding to the second frequency domain resource.
  • the physical channel includes one or more of the following: physical downlink control channel (PDCCH); PDSCH; physical uplink Control channel (physical uplink control channel, PUCCH); physical uplink shared channel (physical uplink shared channel, PUSCH).
  • the network device when the network device instructs the terminal device to perform frequency domain resource switching, there will be a duration for the terminal device to perform frequency domain resource switching, and the duration may be referred to as a first time unit.
  • the frequency domain resource switching delay required by the terminal device to perform frequency domain resource switching is less than or equal to this duration, that is, less than or equal to the first time unit. Therefore, in the embodiment of the present application, in the first time unit, in addition to completing the frequency domain In addition to the time required for resource switching, other time can be used for data transmission.
  • S303 The terminal device switches from the first frequency domain resource to the second frequency domain resource in the second time unit included in the first time unit, and switches the first time unit except the second time unit in the first time unit Data transmission is performed on frequency domain resources and/or second frequency domain resources.
  • the word "data transmission” can mean sending data, receiving data, or sending data and receiving data, where data includes control signaling and service data. Determined according to the actual application scenario. If it indicates sending data, the terminal device may send data to the network device in the first frequency domain resource and/or the second frequency domain resource; if it indicates receiving data, the terminal device may send data in the first frequency domain resource and/or the second frequency domain resource Receive data from network devices in frequency domain resources.
  • the second time unit refers to the time actually required by the terminal device to switch from the first frequency domain resource to the second frequency domain resource.
  • S304 The network device performs data transmission on the first frequency domain resource and/or the second frequency domain resource in the first time unit except the second time unit.
  • the data transmission in this step means that the network device can perform data transmission on the first frequency domain resource and/or the second frequency domain resource in the first time unit except the second time unit.
  • the terminal device has the capability of performing data transmission in the first time unit, but it does not mean that the terminal device will definitely perform data transmission in the first time unit. If there is no data to be transmitted in the first time unit, the terminal device may not perform data transmission in the first time unit.
  • the network device schedules the terminal device to perform data transmission in the first frequency domain resource before sending the first information. For example, as shown in FIG. 4, the network device may schedule the terminal device to perform data transmission in the time slot n and the time slot n+1 through the scheduling information in the time slot n-2, where n is an integer, such as 0 or 1 , the specific value is not limited.
  • the network device needs to instruct the terminal device to switch to the second frequency domain resource. For example, in FIG. 4, the network device sends the first information in the time slot n, instructing the terminal device to switch to the time slot n+2 switch to the second frequency domain resource before the start time of .
  • the data scheduled to be transmitted in the first frequency domain resource may continue to pass through the first frequency domain within the first time unit. domain resource and/or second frequency domain resource transmission. That is, the data transmitted by the terminal device in the first time unit may be data that the network device schedules to transmit in the first frequency domain resource before sending the first information.
  • the terminal device may independently determine whether to perform data transmission within the first time unit, or may determine whether to perform data transmission within the first time unit according to an instruction of the network device. For example, the network device may send third information indicating that data transmission is performed through the first frequency domain resource and/or the second frequency domain resource in the first time unit other than the second time unit. It should be noted that the third information may not schedule the terminal device to transmit new data, but schedule the terminal device to transmit the data that originally needs to be transmitted through the first frequency domain resource unit in the first time unit, the first frequency domain resource and /or second frequency domain resource transmission.
  • the first information and the third information may be carried in one message, or may be carried in two messages respectively, which is not limited in this application.
  • the network device may also configure the terminal device to monitor the PDCCH on the first frequency domain resource or the second frequency domain resource, and the network device DCI may be sent to the terminal device through the PDCCH, and the DCI schedules the terminal device to perform PDSCH or PUSCH data transmission on the first frequency domain resource or the second frequency domain resource.
  • the time domain position of the PDSCH or PUSCH data transmission is not limited, and may be a time other than the second time unit in the first time unit, or a time after the first time unit.
  • the terminal device performs the PDSCH or PUSCH data transmission according to the received DCI.
  • the terminal device may also perform other channels on the first frequency domain resource or the second frequency domain resource or Transmission of signals, such as PUCCH, physical random access channel (PRACH), synchronization signal block (SSB), channel state information downlink signal (channel state information reference signal, CSI-RS), sounding Reference signal (sounding reference signal, SRS) and so on.
  • signals such as PUCCH, physical random access channel (PRACH), synchronization signal block (SSB), channel state information downlink signal (channel state information reference signal, CSI-RS), sounding Reference signal (sounding reference signal, SRS) and so on.
  • the first time unit represents a period of time, which may include at least one orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol or a time slot (slot) or the like.
  • OFDM orthogonal frequency division multiplexing
  • the second time unit represents a period of time, and the second time unit is less than or equal to the first time unit and greater than or equal to the handover delay of the terminal device.
  • the handover delay of the terminal device may refer to the BWP handover delay.
  • the OFDM symbol is simply referred to as a symbol.
  • the specific length and start time of the first time unit may be configured by the network device, or may be pre-agreed, which is not limited in the embodiment of the present application.
  • the length of the first time unit is a preset time length, which may be pre-configured by a network device or agreed by a protocol, which is not limited in this application.
  • the terminal device may determine the location of the first time unit according to the first information. For example, the terminal device may take the moment of receiving the first information or the moment after the moment of receiving the first information as the start moment of the first time unit; correspondingly, the terminal device will be located after the start moment of the first time unit , and the interval from the start time of the first time unit is a time of a preset duration, which is used as the end time of the first time unit.
  • the terminal device receives the first information in the first symbol in time slot n, and the preset duration is 2 time slots, and the terminal device can take the end time of the first symbol in time slot n as the start of the first time unit At the start time, the end time of the first symbol in the time slot n+2 is taken as the end time of the first time unit.
  • the terminal device may also take the start time of the time slot in which the first information is received as the start time of the first time unit.
  • the terminal device receives the first information at the third symbol in time slot n, and the preset duration is 2 time slots.
  • the terminal device can use the start time of time slot n as the start time of the first time unit, and set The start time of the time slot n+2 is taken as the end time of the first time unit.
  • the time when the timer expires can be used as the starting time of the first time unit, and the time after the time when the timer expires, And the interval from the time when the timer expires is the time of the preset duration, which is used as the end time of the first time unit.
  • timer-based frequency domain resource switching reference may be made to the timer-based BWP switching described above, which will not be repeated here.
  • the first information may further indicate at least one of the length of the first time unit, a start time, and an end time.
  • the terminal device receives the first information at time 1, and the first information indicates that the terminal device completes the handover at time 2.
  • time 2 may be used as the end time of the first time unit, and the time when the first information is received or the time after the time when the first information is received may be used as the start time of the first time unit.
  • the terminal device receives the first information at time 1, and the first indication information indicates that the time of receiving the first information is taken as the start time of the first time unit, and the length of the first time unit is 2 time slots.
  • any time between the time when the first information is received and the end time of the first time unit may be used as the start of the first time unit. time, as long as it is ensured that the duration of the first time unit is greater than the switching delay of the frequency domain resources.
  • first information may also have other ways to indicate the length, start time, and end time of the first time unit, which will not be listed one by one here.
  • the network device may further determine the length, start time, and end time of the first time unit according to the second information. Since the second information indicates that the terminal device transmits data in the second frequency domain resource at the designated time, the designated time may be used as the end time of the first time unit. In this case, the start time of the first time unit may be between the time when the first information or the second information is received to the specified time, as long as the duration of the first time unit is greater than the switching delay of the frequency domain resources. .
  • the terminal device receives the first information and the second information in time slot n, and the second information indicates that the terminal device receives data in the PDSCH of the second frequency domain resource at the start time of time slot n+2, then it can be
  • the start time of the time slot n+2 is taken as the end time of the first time unit.
  • the length, start time, and end time of the first time unit may also be determined in other ways, and will not be described one by one here.
  • the terminal device may perform frequency domain resource switching in the second time unit included in the first time unit.
  • the specific position of the second time unit within the first time unit may be implemented in various manners. In an implementation manner, it can be determined by the terminal device independently, and the terminal device can take any time from the start time of the first time unit to the end time as the start time of the second time unit, and only needs to ensure that enough time is left. It is sufficient to perform frequency domain resource switching.
  • the location of the second time unit in the first time unit is indicated by a network device, where the network device indication may be sent through the following signaling: DCI or RRC signaling or MAC CE or system broadcast message, Or, the position of the second time unit in the first time unit is preset.
  • the positional relationship between the first time unit and the second time unit is described below through different examples.
  • the start time of the first time unit and the start time of the second time unit coincide.
  • the terminal device after the terminal device receives the first information, it starts to perform the frequency domain resource switching process, and after completing the frequency domain resource switching, before the end time of the first time unit, the terminal device can Uplink or downlink data transmission is performed on frequency domain resources.
  • the terminal device may transfer the data originally transmitted on the first frequency domain resource in the first time unit to the first frequency domain resource in the first time unit.
  • the time in a time unit other than the second time unit is switched to the second frequency domain resource for transmission.
  • the network device may instruct the terminal device to switch to the second frequency domain resource for transmission through the third information, or may be determined by the terminal device autonomously or predefined.
  • the terminal device transmits data on the second frequency domain resource
  • the terminal device transmits the data originally scheduled on the first frequency domain resource on the second frequency domain resource
  • the In addition to the domain resource allocation information, other scheduling information is the same as the scheduling information received on the first frequency domain resource, that is, the modulation and coding scheme in the scheduling information, the time domain resource allocation information, and the hybrid automatic repeat request (hybrid automatic repeat request). , HARQ) process number and other information are the same.
  • the relative position of the frequency domain resource when the terminal device transmits on the second frequency domain resource may be the same as the frequency domain allocation information in the scheduling information received on the first frequency domain resource.
  • the network device may also instruct the terminal device to transmit the scheduling information originally scheduled on the first frequency domain resource on the second frequency domain resource through signaling, for example, it can re-indicate the transmission modulation Coding scheme, time domain resource information, frequency domain resource information and other information.
  • scheduling information when the terminal device transmits data on the second frequency domain resource may be predefined, and at this time, the terminal device transmits data on the second frequency domain resource according to the predefined scheduling information in the first frequency domain. Data scheduled on the resource.
  • the terminal device works on the first frequency domain resource before time slot n, and receives DCI in the first three symbols of time slot n, and the DCI includes the first information , the second information, and the third information, wherein the second information indicates that the terminal device performs PDSCH or PUSCH transmission on the second frequency domain resource in the time slot n+2.
  • the start time of the first time unit is the time when DCI is received
  • the end time of the first time unit is the end time of time slot n+1 (or the start time of time slot n+2).
  • the start time of the second time unit is also the time when DCI is received, and the end time of the second time unit is located before the end time of the first time unit.
  • the specific location is not limited, as long as the duration of the second time unit is greater than or equal to The switching delay of frequency domain resources is sufficient.
  • the network device On time slot n and time slot n+1, the network device has scheduled the terminal device to perform PDSCH or PUSCH transmission on the first frequency domain resource. After receiving the DCI, the terminal device immediately starts to perform frequency domain resource switching, and after switching to the second frequency domain resource, before time slot n+2, transmits data on the second frequency domain resource, and the data is the original Schedule the data scheduled on the first frequency domain resource in time slot n and time slot n+1. On time slot n+2, the terminal device transmits PDSCH or PUSCH data scheduled by the second information in the second frequency domain resource.
  • the data originally transmitted on the first frequency domain resource in the first time unit can be switched to the second frequency domain resource at the time other than the second time unit in the first time unit.
  • the network device may also instruct the terminal device to perform new PDSCH or PUSCH data transmission or PDCCH or PUCCH channel transmission on the second frequency domain resource at a time other than the second time unit in the first time unit.
  • the network device can configure the terminal device to monitor the PDCCH resources on the second frequency domain resources, and the network device can pass the PDCCH resources on the second frequency domain resources.
  • the PDCCH sends DCI to the terminal device, and the DCI schedules the terminal device to perform PDSCH or PUSCH data transmission on BWP2. It should be noted that the time domain position of the PDSCH or PUSCH data transmission is not limited. The time in the unit other than the second time unit may also be the time after the first time unit.
  • the terminal device performs the PDSCH or PUSCH data transmission according to the received DCI.
  • the end time of the first time unit coincides with the end time of the second time unit.
  • the network device schedules the terminal device to perform data transmission on the first frequency domain resource in the first time unit, at this time, after the terminal device receives the first information, it can perform data transmission at the end of the first time unit.
  • the location reserves a time length corresponding to the second time unit for performing frequency domain resource switching; data transmission can be continued on the first frequency domain resource within a period of time before performing frequency domain resource switching.
  • the terminal device works on the first frequency domain resource before time slot n, and receives DCI in the first three symbols of time slot n, the DCI includes the first information, the second information and the The third information, wherein the second information indicates that the terminal device performs PDSCH or PUSCH transmission on the second frequency domain resource in time slot n+2.
  • the start time of the first time unit is the time when DCI is received
  • the end time of the first time unit is the end time of time slot n+1 (or the start time of time slot n+2).
  • the end time of the second time unit is also the end time of time slot n+1, and the start time of the second time unit is located after the start time of the first time unit.
  • the specific location is not limited, as long as the second time unit is guaranteed
  • the duration may be greater than or equal to the handover delay of the frequency domain resources.
  • the terminal device After receiving the DCI, the terminal device continues to perform data transmission on the first frequency domain resource until it stops data transmission at the start time of the second time unit, and performs frequency domain resource switching. After switching to the second frequency domain resource, on time slot n+2, the terminal device transmits PDSCH or PUSCH data scheduled by the second information in the second frequency domain resource.
  • the start time of the first time unit does not coincide with the start time of the second time unit, and the end time of the first time unit does not coincide with the end time of the second time unit.
  • data transmission can be performed on the first frequency domain resource; after the end time of the second time unit, at the first time Before the end time of the unit, data transmission may be performed on the second frequency domain resource.
  • the network device schedules the terminal device to perform data transmission on the first frequency domain resource within the first time unit. At this time, before the start time of the second time unit, the terminal device can continue to transmit data on the first frequency domain resource; after the frequency domain resource switching is completed, that is, at the end start time of the second time unit, the terminal device The data originally transmitted on the first frequency domain resource in the first time unit may be switched to be transmitted on the second frequency domain resource.
  • the terminal device works on the first frequency domain resource before time slot n, and receives DCI in the first three symbols of time slot n, the DCI includes the first information, the second information and the The third information, wherein the second information indicates that the terminal device performs PDSCH or PUSCH transmission on the second frequency domain resource in time slot n+2.
  • the start time of the first time unit is the time when DCI is received
  • the end time of the first time unit is the end time of time slot n+1 (or the start time of time slot n+2).
  • the start time of the second time unit is time 1
  • the end time of the second time unit is time 2. Both time 1 and time 2 are located within the first time unit.
  • the terminal device After receiving the DCI, the terminal device continues to perform data transmission on the first frequency domain resource, stops data transmission until time 1, and performs frequency domain resource switching. After switching to the second frequency domain resource, at time 2, the data originally scheduled to be transmitted on the first frequency domain resource is transmitted in the second frequency domain resource. On time slot n+2, the terminal device transmits PDSCH or PUSCH data scheduled by the second information in the second frequency domain resource.
  • the network device can also configure the terminal device to monitor the PDCCH on the first frequency domain resource or the second frequency domain resource, and the network device can pass the PDCCH through the DCI is sent to the terminal device, where the DCI schedules the terminal device to perform PDSCH or PUSCH data transmission on the second frequency domain resource.
  • the time domain position of the PDSCH or PUSCH data transmission is not limited, and may be a time other than the second time unit in the first time unit, or a time after the first time unit.
  • the terminal device performs the PDSCH or PUSCH data transmission according to the received DCI.
  • a shorter BWP handover may also be introduced.
  • the delay for the terminal device to perform BWP handover can be referred to as the first handover delay
  • the BWP handover delay defined in the 3rd generation partnership project (3GPP) protocol may be referred to as the second handover delay.
  • the first switching delay is smaller than the second switching delay.
  • the first switching delay may be implemented in any of the following ways:
  • the first handover delay has no corresponding relationship with parameters such as subcarrier spacing (SCS), that is, no matter what specific value of SCS takes, the first handover delay is the same value, and the first handover delay is less than Minimum BWP handover delay in Table 1.
  • SCS subcarrier spacing
  • Implementation mode 2 is similar to the BWP handover delay in Table 1, and the first handover delay corresponding to different SCSs may have different values. For example, when the SCSs are 15KHz, 30KHz, 60KHz, and 120KHz, respectively, the first switching delay may correspond to different values. When the first switching delay and the second switching delay correspond to the same SCS, the first switching delay is smaller than the second switching delay.
  • the value of the first handover delay may be as shown in Table 2.
  • ⁇ is a parameter corresponding to the subcarrier interval in which the terminal device works.
  • Implementation Mode 3 Similar to the BWP handover delay in Table 1, the first handover delay corresponding to different SCSs may have different values; there is at least one SCS, and the first handover delay and the second handover delay correspond to at least one SCS When SCS is in , the first handover delay is smaller than the second handover delay.
  • the value of the first handover delay may be as shown in Table 3.
  • the terminal device can switch to other BWPs faster to obtain greater frequency diversity gain and load balancing gain. And because the BWP switching time is shorter, the data transmission interruption time caused by the BWP switching is shorter, which reduces the impact of the BWP switching on the data transmission of the terminal device, and is beneficial to improve the data transmission rate of the terminal device. At the same time, it can quickly avoid enhanced mobile broadband (eMBB) or ultra-high reliability and low latency (URLLC) services to ensure the transmission performance of higher priority services.
  • eMBB enhanced mobile broadband
  • URLLC ultra-high reliability and low latency
  • the embodiment of the present application also provides a data transmission method, which can reduce the interruption duration of data transmission caused by switching of frequency domain resources, and improve the efficiency of data transmission.
  • FIG. 8 a schematic flowchart of a data transmission method provided by an embodiment of the present application is shown. The method includes:
  • the network device sends control information to the terminal device in the first frequency domain resource.
  • the terminal device receives control information from the network device in the first frequency domain resource.
  • control information indicates that data transmission is performed in the second frequency domain resource, and indicates the start time of data transmission
  • S803 The terminal device switches to the second frequency domain resource according to the control information, and performs data transmission on the second frequency domain resource.
  • S804 The network device performs data transmission with the terminal device in the second frequency domain resource.
  • the end time of performing frequency domain resource switching coincides with (or is the same as) the start time of data transmission indicated by the control information.
  • the time period between the start time of frequency domain resource switching and the start time of data transmission indicated by the control information is greater than or equal to the frequency domain resource switching delay required for the terminal device to perform frequency domain resource switching.
  • the frequency domain resource switching delay required by the terminal device to perform frequency domain resource switching can be determined in various ways, for example, it can be determined through Table 1.
  • the time period between the time when the control information is received or sent and the start time of data transmission indicated by the control information is greater than or equal to the frequency domain resource switching delay required for the terminal device to perform frequency domain resource switching.
  • the network device sends control information at symbol 5 in time slot n
  • the start time of data transmission is the start time of time slot n+1
  • the start time of symbol 5 in time slot n The time period to the start time of the time slot n+1 may be equal to the frequency domain resource switching delay required for frequency domain resource switching, and within this time period, the terminal device performs frequency domain resource switching.
  • the DCI including the control information can be transmitted at any position in a time slot, for example, a time slot includes 13 symbols, and the DCI can be in any one of the symbols, which is specifically determined according to the actual situation.
  • the time slot in which the terminal device receives the DCI and the time slot in which the terminal device completes the frequency domain resource switching according to the DCI are the same time slot, and the moment when the terminal device completes the frequency domain resource switching is the end time of the time slot (or referred to as the end time of the time slot).
  • the time when the terminal device receives the DCI to the end time of the time slot in which the DCI is received can be equal to the frequency domain resource switching delay required by the terminal device, so that the terminal device receives in one time slot
  • the frequency domain resource switching is performed immediately, and the moment when the switching is completed is exactly the end moment of the time slot.
  • the frequency domain resource switching delay is aligned with the end boundary of the time slot, and the time when the terminal device receives the DCI in a time slot is no later than a specific time before the end time of the time slot, and the specific time is far from the time
  • the duration between the end times of the slots is the frequency domain resource switching delay.
  • the network device sends control information at symbol 6 in time slot n
  • the start time of data transmission is the start time of time slot n+2
  • the start time of symbol 6 in time slot n The time period to the end time of the time slot n is equal to the frequency domain resource handover delay required for frequency domain resource handover, and within this time period, the terminal device performs frequency domain resource handover.
  • the DCI can be sent and received at any position in the time slot, so the frequency domain resource switching triggered by the DCI is more flexible.
  • the time when the frequency domain resource switching is completed is aligned with the time slot tail boundary, which can avoid the frequency domain resource switching spanning multiple time slots, thus ensuring that a complete time slot can be used for data in the next time slot of the time slot.
  • Transmission since the terminal equipment transmits data according to the granularity of time slots, it is beneficial to the realization of signal reception and detection of the terminal equipment.
  • the above-mentioned respective embodiments may be implemented independently, or may also be implemented in combination with each other.
  • the differences between the various embodiments are emphatically described. Except for other contents of the differences, other contents between the different embodiments can be referred to each other.
  • the step numbers of the flowcharts described in the embodiments are only an example of the execution flow, and do not constitute a restriction on the sequence of execution of the steps.
  • steps that do not have time-series dependencies are not strictly related to each other. execution order.
  • not all the steps shown in each flowchart are steps that must be executed, and some steps may be added or deleted on the basis of each flowchart according to actual needs.
  • the access network device or the terminal device may include a hardware structure and/or a software module, and implement the above in the form of a hardware structure, a software module, or a hardware structure plus a software module. each function. Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • each functional module in each embodiment of the present application may be integrated into one processor, or may exist physically alone, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • an embodiment of the present application further provides an apparatus 1100 for implementing the functions of the access network device or the terminal device in the above method.
  • the apparatus may be a software module or a system-on-chip.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 1100 may include: a processing unit 1101 and a communication unit 1102 .
  • the communication unit may also be referred to as a transceiver unit, and may include a sending unit and/or a receiving unit, respectively configured to perform the sending and receiving steps of the access network device or the terminal device in the above method embodiments.
  • a communication unit may also be referred to as a transceiver, transceiver, transceiver, or the like.
  • the processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the communication unit 1102 may be regarded as a receiving unit, and the device for implementing the sending function in the communication unit 1102 may be regarded as a transmitting unit, that is, the communication unit 1102 includes a receiving unit and a transmitting unit.
  • a communication unit may also sometimes be referred to as a transceiver, transceiver, or transceiver circuit, or the like.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • a communication unit configured to receive first information from the network device in the first frequency domain resource, where the first information indicates switching to the second frequency domain resource;
  • a processing unit configured to determine a first time unit according to the first information, wherein the first time unit includes a second time unit; switching from the first frequency domain resource to the second frequency domain in the second time unit domain resources;
  • the communication unit is configured to perform data transmission on the first frequency domain resource and/or the second frequency domain resource in time in the first time unit other than the second time unit.
  • a processing unit configured to send first information to the terminal device in the first frequency domain resource through the communication unit, where the first information indicates switching to the second frequency domain resource;
  • the processing unit configured to perform data transmission on the first frequency domain resource and/or the second frequency domain resource in a time other than the second time unit in the first time unit through the communication unit ;
  • the first information indicates the first time unit, the first time unit includes a second time unit, and the second time unit is used to switch from the first frequency domain resource to the second frequency domain domain resources.
  • processing unit 1101 and the communication unit 1102 may also perform other functions.
  • processing unit 1101 and the communication unit 1102 may also perform other functions.
  • the communication apparatus 1100 may also execute the method shown in FIG. 8 , which will not be repeated here.
  • FIG. 12 shows an apparatus 1200 provided in this embodiment of the present application.
  • the apparatus shown in FIG. 12 may be a hardware circuit implementation of the apparatus shown in FIG. 11 .
  • the communication apparatus can be applied to the flow chart shown above, and executes the functions of the terminal device or the access network device in the foregoing method embodiments.
  • FIG. 12 only shows the main components of the communication device.
  • the communication device 1200 includes a processor 1210 and an interface circuit 1220 .
  • the processor 1210 and the interface circuit 1220 are coupled to each other.
  • the interface circuit 1220 can be a transceiver, a pin, an interface circuit or an input/output interface.
  • the communication apparatus 1200 may further include a memory 1230 for storing instructions executed by the processor 1210 or input data required by the processor 1210 to execute the instructions or data generated after the processor 1210 executes the instructions.
  • the processor 1210 is used to implement the function of the above-mentioned processing unit 1101
  • the interface circuit 1220 is used to implement the function of the above-mentioned communication unit 1102 .
  • the communication apparatus 1200 may also execute the method shown in FIG. 8 , which will not be repeated here.
  • the terminal device chip When the above communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments.
  • the terminal device chip receives information from other modules (such as radio frequency modules or antennas) in the terminal device, and the information is sent by the access network device to the terminal device; or, the terminal device chip sends information to other modules (such as radio frequency) in the terminal device. module or antenna) to send information, the information is sent by the terminal equipment to the access network equipment.
  • modules such as radio frequency modules or antennas
  • the access network device chip When the above communication device is a chip applied to an access network device, the access network device chip implements the functions of the access network device in the above method embodiments.
  • the access network device chip receives information from other modules (such as radio frequency modules or antennas) in the access network device, and the information is sent by the terminal device to the access network device; or, the access network device chip sends information to the access network device.
  • Other modules in the device such as radio frequency modules or antennas
  • send information which is sent by the access network device to the terminal device.
  • processors in the embodiments of the present application may be a central processing unit, and may also be other general-purpose processors, digital signal processors, application-specific integrated circuits, or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • a general-purpose processor may be a microprocessor or any conventional processor.
  • the memory may be random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, mobile hard disk or any other form of storage medium known in the art.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, etc.) having computer-usable program code embodied therein.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

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Abstract

本申请提供一种数据传输方法及装置，其中方法包括：在第一频域资源中接收来自网络设备的第一信息，第一信息指示切换到第二频域资源；根据第一信息确定第一时间单元，其中，第一时间单元包括第二时间单元；在第二时间单元中从第一频域资源切换到第二频域资源，并在第一时间单元中除第二时间单元之外的时间中在第一频域资源和/或第二频域资源上进行数据传输。通过实施上述方法，在第一时间单元中除了频域资源切换之外的时间，终端设备可以进行数据传输，从而提高数据传输的数据吞吐率，降低频域资源切换对数据传输造成的影响。还可以实现快速的在不同频域资源之前的切换，以获得更高的频率分集或者选择性调度增益、更快速的高优先级业务避让。

Description

一种数据传输方法及装置
相关申请的交叉引用
本申请要求在2021年03月12日提交中国专利局、申请号为202110269363.5、申请名称为“一种数据传输方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种数据传输方法及装置。
背景技术
新无线(new radio，NR)系统中引入了带宽部分(bandwidth part，BWP)的概念。一个BWP是一个载波上的一段连续频率资源。一个终端设备在一个服务小区(serving cell)可以被配置一个或多个BWP，但同时只能激活一个上行BWP和一个下行BWP，终端设备只能在激活的BWP上进行数据传输。当终端设备在一个服务小区被配置了多个BWP时，为使终端设备能够根据业务需要在不同的BWP上收发数据，NR系统中支持BWP切换。
实现BWP切换有多种方法，例如网络设备可以向终端设备发送下行控制信息(downlink control information，DCI)，从而通过DCI指示终端设备进行BWP切换；例如网络设备可以向终端设备发送无线资源控制(radio resource control，RRC)信令，从而通过RRC信令指示终端设备进行BWP切换。
对于通过DCI指示的BWP切换，网络设备是通过调度物理下行共享信道(physical downlink shared channel，PDSCH)或者物理上行共享信道(physical uplink shared channel，PUSCH)数据传输的DCI指示终端设备进行BWP切换，也就是说，网络设备通过DCI指示终端设备进行BWP切换的同时，会调度一个PDSCH或者PUSCH的传输，所调度的数据传输需要在切换后的BWP上传输，终端设备在收到DCI与所调度的数据传输之前，进行BWP切换过程，并且在BWP切换过程期间不会进行任何数据发送或者接收。
综上可知，现有技术中，终端设备在BWP切换过程内不能进行数据传输，从而影响终端设备的数据吞吐率。
发明内容
本申请目的在于提供一种数据传输方法及装置，用以降低频域资源切换对终端设备的数据传输的影响，并提高终端设备的数据吞吐率。
第一方面，本申请提供一种数据传输方法，该方法适用于网络设备为终端设备配置多个频域资源的场景。该方法的执行主体为终端设备或终端设备中的一个模块，这里以终端设备为执行主体为例进行描述。该方法包括：在第一频域资源中接收来自网络设备的第一信息，第一信息指示切换到第二频域资源；根据第一信息确定第一时间单元，其中，第一时间单元包括第二时间单元；在第二时间单元中从第一频域资源切换到第二频域资源，并在第一时间单元中除第二时间单元之外的时间中在第一频域资源和/或第二频域资源上进 行数据传输。
通过实施上述方法，在第一时间单元中除了频域资源切换之外的时间，终端设备可以进行数据传输，从而提高数据传输的数据吞吐率，降低数据传输时延，降低频域资源切换对数据传输造成的影响。同时还可以实现更快速的不同频域资源之前的切换，以获得更高的频率分集或者选择性调度增益、更快速的负载均衡效果、更快速的高优先级业务避让。
在一种可能的实现方式中，在第一时间单元中通过第一频域资源和/或第二频域资源中进行数据传输，包括：在第一时间单元的起始时刻至第二时间单元的起始时刻之间，在第一频域资源进行数据传输；和/或，在第二时间单元的结束时刻至第一时间单元的结束时刻之间，在第二频域资源进行数据传输。
通过实施上述方法，根据频域资源切换的位置，分别在第一频域资源和/或第二频域资源进行数据传输，可以充分利用第一频域资源和/或第二频域资源中的资源，提高资源利用率。
在一种可能的实现方式中，第一时间单元的起始时刻位于接收第一信息的时刻之后；
第一信息还指示第一时间单元的长度、起始时刻以及结束时刻中的至少一项。
通过第一信息指示第一时间单元，可以保证网络设备和终端设备对第一时间单元的理解一致，避免对在第二频域资源中传输的数据造成干扰。
在一种可能的实现方式中，方法还包括：接收来自网络设备的第二信息，第二信息指示在指定时刻在第二频域资源中传输数据，且第二信息与第一信息包括于同一条消息中；
第一时间单元的结束时刻为第二信息指示的指定时刻。
通过将在第二频域资源中指示的数据传输时刻作为第一时间单元的结束时刻，有利于网络设备在第二频域资源对终端设备进行数据调度，避免数据传输冲突。
在一种可能的实现方式中，方法还包括：接收来自网络设备的第三信息，第三信息指示在第一时间单元除第二时间单元之外的时间中通过第一频域资源和/或第二频域资源进行传输。
通过第三信息进行指示，网络设备可以灵活指示终端设备是否在第一时间单元除第二时间单元之外的时间中进行数据传输以及如何进行数据传输，增加了网络调度的灵活性，保证了用户进行数据传输的性能。
在一种可能的实现方式中，方法还包括：第二时间单元在第一时间单元中的位置由网络设备指示；或者，第二时间单元在第一时间单元中的位置为预设的。
在一种可能的实现方式中，第一时间单元的起始时刻和第二时间单元的起始时刻重合，或者第一时间单元的结束时刻和第二时间单元的结束时刻重合。
第一时间单元的起始时刻和第二时间单元的起始时刻重合时，终端设备可以及时进行频域资源切换，从而可以紧急避让第一频域资源中传输的优先级较高的数据，同时可以实现更快速的负载均衡，也获得更高的频率分集或者选择性调度增益。第一时间单元的结束时刻和第二时间单元的结束时刻重合时，终端设备如果接收到第一信息时，继续进行数据传输，可以一边准备频域切换所需的参数，一边进行解析第一信息，降低对终端更快速准备切换过程的能力的需求，有利于降低终端复杂度和功耗。
在一种可能的实现方式中，第一频域资源和第二频域资源的索引值不同，或者，第一频域资源和第二频域资源的索引值相同，频域位置不同。
第二方面，本申请提供一种数据传输方法，该方法适用于网络设备为终端设备配置多 个频域资源的场景。该方法的执行主体为网络设备或网络设备中的一个模块，这里以网络设备为执行主体为例进行描述。该方法包括：在第一频域资源中向终端设备发送第一信息，第一信息指示切换到第二频域资源；在第一时间单元中除第二时间单元之外的时间中在第一频域资源和/或第二频域资源上进行数据传输；其中，第一信息指示第一时间单元，第一时间单元包括第二时间单元，第二时间单元用于从第一频域资源切换到第二频域资源。
在一种可能的实现方式中，在第一时间单元中通过第一频域资源和/或第二频域资源中进行数据传输，包括：在第一时间单元的起始时刻至第二时间单元的起始时刻之间，在第一频域资源进行数据传输；和/或，在第二时间单元的结束时刻至第一时间单元的结束时刻之间，在第二频域资源进行数据传输。
在一种可能的实现方式中，第一时间单元的起始时刻位于接收第一信息的时刻之后；
第一信息还指示第一时间单元的长度、起始时刻以及结束时刻中的至少一项。
在一种可能的实现方式中，方法还包括：向终端设备发送第二信息，第二信息指示在指定时刻在第二频域资源中传输数据，且第二信息与第一信息包括于同一条消息中；第一时间单元的结束时刻为第二信息指示的指定时刻。
在一种可能的实现方式中，方法还包括：向终端设备发送第三信息，第三信息指示在第一时间单元除第二时间单元之外的时间中通过第一频域资源和/或第二频域资源进行传输。
在一种可能的实现方式中，方法还包括：第二时间单元在第一时间单元中的位置由网络设备指示；或者，第二时间单元在第一时间单元中的位置为预设的。
在一种可能的实现方式中，第一时间单元的起始时刻和第二时间单元的起始时刻重合，或者第一时间单元的结束时刻和第二时间单元的结束时刻重合。
在一种可能的实现方式中，第一频域资源和第二频域资源的索引值不同，或者，第一频域资源和第二频域资源的索引值相同，频域位置不同。
需要说明的是，上述第二方面所描述的方法与第一方面所描述的方法相对应，第二方面所描述的方法中相关技术特征的有益效果可以参见第一方面的描述，具体不再赘述。
第三方面，本申请提供一种数据传输方法，该方法适用于网络设备为终端设备配置多个频域资源的场景。该方法的执行主体为终端设备或终端设备中的一个模块，这里以终端设备为执行主体为例进行描述。该方法包括：在第一频域资源中接收来自网络设备的控制信息，控制信息指示在第二频域资源进行数据传输，并指示数据传输的起始时刻；根据控制信息切换到第二频域资源，并在第二频域资源进行数据传输；其中，控制信息所在的时隙和终端设备根据控制信息完成频域资源切换的时隙为同一个时隙，且终端设备完成频域资源切换的时刻为该时隙的结束时刻(或者称为尾边界)。
通过上述方法，终端设备接收控制信息的时刻至接收该控制信息的时隙的结束时刻可以等于终端设备所需的频域资源切换时延，这样终端设备在一个时隙中接收到控制信息时，立即进行频域资源切换，切换完成的时刻正好为该时隙的结束时刻，可以避免频域资源切换跨越多个时隙，从而可以保证在该时隙的下一个时隙中有一个完整的时隙可以用于数据传输，由于终端设备是按照时隙粒度进行数据传输，因此有利于终端设备的信号接收检测实现。
在一种可能的实现方式中，进行频域资源切换的结束时刻与控制信息指示的数据传输的起始时刻重合。
在一种可能的实现方式中，接收控制信息的结束时刻与第三时间单元的起始时刻之间的时长等于进行频域资源切换所需的频域资源切换时延。
第四方面，本申请提供一种数据传输方法，该方法适用于网络设备为终端设备配置多个频域资源的场景。该方法的执行主体为网络设备或网络设备中的一个模块，这里以网络设备为执行主体为例进行描述。该方法包括：在第一频域资源中向终端设备发送控制信息，控制信息指示在第二频域资源进行数据传输，并指示数据传输的起始时刻；在第二频域资源与终端设备进行数据传输；其中，控制信息所在的时隙和终端设备根据控制信息完成频域资源切换的时隙为同一个时隙，且终端设备完成频域资源切换的时刻为该时隙的结束时刻(或者称为尾边界)。
在一种可能的实现方式中，进行频域资源切换的结束时刻与控制信息指示的数据传输的起始时刻重合。
在一种可能的实现方式中，接收控制信息的结束时刻与第三时间单元的起始时刻之间的时长等于进行频域资源切换所需的频域资源切换时延。
第五方面，本申请还提供一种通信装置，该通信装置具有实现上述第一或三方面提供的任一方法。该通信装置可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的实现方式中，该通信装置包括：处理器，该处理器被配置为支持该通信装置执行以上所示方法中终端设备的相应功能。该通信装置还可以包括存储器，该存储可以与处理器耦合，其保存该通信装置必要的程序指令和数据。可选地，该通信装置还包括通信接口，该通信接口用于支持该通信装置与网络设备等设备之间的通信。
在一种可能的实现方式中，该通信装置包括相应的功能模块，分别用于实现以上方法中的步骤。功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的实施方式中，通信装置的结构中包括处理单元和通信单元，这些单元可以执行上述方法示例中相应功能，具体参见第五方面提供的方法中的描述，此处不做赘述。
第六方面，本申请还提供一种通信装置，该通信装置具有实现上述第二或四方面提供的任一方法。该通信装置可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的实现方式中，该通信装置包括：处理器，该处理器被配置为支持该通信装置执行以上所示方法中网络设备的相应功能。该通信装置还可以包括存储器，该存储可以与处理器耦合，其保存该通信装置必要的程序指令和数据。可选地，该通信装置还包括通信接口，该通信接口用于支持该通信装置与终端设备等设备之间的通信。
在一种可能的实现方式中，该通信装置包括相应的功能模块，分别用于实现以上方法中的步骤。功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的实施方式中，通信装置的结构中包括处理单元和通信单元，这些单元可以执行上述方法示例中相应功能，具体参见第五方面提供的方法中的描述，此处不做赘述。
第七方面，提供了一种通信装置，包括处理器和接口电路，接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述第 一方面或第一方面的任意可能的实现方式中的方法。
第八方面，提供了一种通信装置，包括处理器和接口电路，接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述第二方面、第二方面的任意可能的实现方式中的方法的功能模块。
第九方面，提供了一种通信装置，包括处理器和接口电路，接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述第三方面、第三方面的任意可能的实现方式中的方法的功能模块。
第十方面，提供了一种通信装置，包括处理器和接口电路，接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述第四方面、第四方面的任意可能的实现方式中的方法的功能模块。
第十一方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序或指令，当该计算机程序或指令被处理器执行时，实现前述第一方面至第四方面中任一方面、以及任一方面的任意可能的实现方式中的方法。
第十二方面，提供了一种包含指令的计算机程序产品，当该指令被处理器运行时，实现前述第一方面至第四方面中任一方面、以及任一方面的任意可能的实现方式中的方法。
第十三方面，提供一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现前述第一方面至第四方面中任一方面、以及任一方面的任意可能的实现方式中的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十四方面，提供一种通信系统，所述系统包括第七方面所述的装置(如终端设备)以及第八方面所述的装置(如网络设备)。
第十五方面，提供一种通信系统，所述系统包括第九方面所述的装置(如网络设备)以及第十方面所述的装置(如终端设备)。
附图说明
图1为适用于本申请实施例提供的一种网络架构示意图；
图2为本申请实施例提供的一种调度时延示意图；
图3为本申请实施例提供的一种数据传输方法流程示意图；
图4为本申请实施例提供的一种数据传输示意图；
图5为本申请实施例提供的一种第一时间单元和第二时间单元的位置关系示意图；
图6为本申请实施例提供的一种第一时间单元和第二时间单元的位置关系示意图；
图7为本申请实施例提供的一种第一时间单元和第二时间单元的位置关系示意图；
图8为本申请实施例提供的一种数据传输方法流程示意图；
图9为本申请实施例提供的一种频域资源切换示意图；
图10为本申请实施例提供的一种频域资源切换示意图；
图11为本申请实施例提供的一种通信装置结构示意图；
图12为本申请实施例提供的一种通信装置结构示意图。
具体实施方式
下面结合说明书附图对本申请实施例做详细描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)以及NR系统等，在此不做限制。
本申请实施例中，终端设备，可以是一种具有无线收发功能的设备，其可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。终端设备可以是用户设备(user equipment，UE)，其中，UE包括具有无线通信功能的手持式设备、车载设备、可穿戴设备或计算设备。示例性地，UE可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端设备还可以是虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制中的无线终端、无人驾驶中的无线终端等。本申请实施例中，用于实现终端设备的功能的装置也可以是能够支持终端设备实现该功能的装置，例如芯片系统，该装置可以被安装在终端中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。
本申请中的终端设备可以为第一类型终端设备或第二类型终端设备，第一类型终端设备和第二类型终端设备可以具备下述至少一项区别特征：
1、带宽能力不同，例如，第一类型终端设备支持的带宽小于第二类型终端设备支持的带宽。
2、收发天线数不同，例如，第一类型终端设备支持的收发天线数小于第二类型终端设备支持的收发天线数。
3、上行最大发射功率不同，例如，第一类型终端设备支持的上行最大发射功率小于第二类型终端设备支持的上行最大发射功率。
4、协议版本不同。例如，第一类型终端设备可以是NR版本17(release-17，Rel-17)或者NR Rel-17以后版本中的终端设备。第二类型终端设备例如可以是NR版本15(release-15，Rel-15)或NR版本16(release-16，Rel-16)中的终端设备。第二类型终端设备也可以称为NR传统(NR legacy)终端设备。
5、对数据的处理能力不同。例如，第一类型终端设备接收下行数据与发送对该下行数据的反馈之间的最小时延大于第二类型终端设备接收下行数据与发送对该下行数据的反馈之间的最小时延；和/或，第一类型终端设备发送上行数据与接收对该上行数据的反馈之间的最小时延大于第二类型终端设备发送上行数据与接收对该上行数据的反馈之间的最小时延。
一种可能的实现方式中，第一类型终端设备可以是指低能力(reduced capability，REDCAP)终端设备，或者，第一类型终端设备还可以是指低能力终端设备、降低能力终端设备、REDCAP UE、Reduced Capacity UE、窄带NR(narrow-band NR，NB-NR)UE等。第二类型终端设备可以是指传统能力或正常能力或高能力的终端设备，也可以称为传统(legacy)终端设备或者常规(normal)终端设备，第二类型终端设备与第一类型终端设备具有但不限于上述区别特征。
在本申请实施例中，网络设备可以为各种制式下无线接入设备，例如可以是NR系统中的下一代基站(next Generation node B，gNB)，可以是演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)或节点B(Node B，NB)、基站 控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission and reception point，TRP或者transmission point，TP)等，还可以为NR系统中的gNB或传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或在集中式-分布式(central unit-distributed,CU-DU)架构下的DU等。
为便于理解本申请实施例，首先以图1中示出的通信系统为例详细说明适用于本申请实施例的通信系统。图1示出了适用于本申请实施例的通信系统的示意图。如图1所示，基站和终端设备1～终端设备6组成一个通信系统，在该通信系统中，基站发送信息给终端设备1～终端设备6中的一个或多个终端设备。此外，终端设备4～终端设备6也组成一个通信系统，在该通信系统中，终端设备5可以发送信息给终端设备4和终端设备6中的一个或多个终端设备。
本申请实施例中，网络设备可以为终端设备在每个载波上配置多个上行BWP和下行BWP，分别用于上行传输和下行传输。对于同一个载波，每个终端同时只能激活一个BWP，终端只能在激活的BWP上进行数据传输。在实际应用过程中，终端设备可能会从一个BWP切换到另外一个BWP，目前BWP切换主要有以下三种方式：
实现方式一：基于RRC信令的BWP切换。
基于RRC信令的BWP切换，是指网络设备通过RRC信令指示终端设备进行BWP切换。基于RRC信令的BWP切换主要用于RRC重配消息下发或者辅载波激活之后，让终端设备工作在一个新的BWP。
基于RRC信令的BWP切换能让终端设备在RRC重配后或者辅载波激活后立马进入合适的BWP进行数据传输，而不是停留在初始(initial)BWP上。
实现方式二：基于DCI的BWP切换。
基于DCI的BWP切换，是指网络设备通过DCI指示终端设备进行BWP切换，该DCI同时调度终端设备进行PDSCH或者PUSCH数据传输，该DCI所调度的数据传输需要在该DCI中携带的BWP索引(index)对应的BWP上传输。当终端设备确定该DCI中的BWP索引与接收该DCI的BWP的索引不同时，终端设备切换到DCI中携带的BWP索引对应的BWP上。
实现方式三：基于定时器的BWP切换。
在该方式中，网络侧可以配置一个BWP非激活定时器(bwp-inactivitytimer)。终端设备进行数据传输结束之后，可以启动BWP非激活定时器，如果终端设备在当前BWP的BWP非激活定时器超时，终端设备还没有数据需要传输，则可以切换到带宽较小的BWP，例如切换到默认BWP(default BWP)，从而可以实现节能。
终端设备执行BWP切换需要一定的时延，例如，针对基于DCI的BWP切换，根据终端设备能力的不同，NR系统中定义了两种不同类型(type)的BWP切换时延，具体如表1所示。
表1
Figure PCTCN2022077880-appb-000001
其中，μ是终端设备工作的子载波间隔对应的参数，即终端设备工作的子载波间隔为2 μ·15kHz。终端设备可以向网络设备上报其支持的BWP切换能力为类型1还是类型2。
目前，在BWP切换过程中，终端设备需要对接收到的DCI进行译码，需要重新加载切换后的BWP的配置参数信息，而且还需要根据切换后的BWP的配置参数对射频通道进行调整，因此在BWP切换时延T BWPswitchDelay内，不要求终端设备进行数据传输。需要说明的是，目前并没有具体区分上述三个过程中每个过程所需的时延，只针对整个BWP切换过程定义了一个总的BWP切换时延。
另外，针对基于DCI的BWP切换，DCI调度的数据传输与DCI发送时刻之间的时延可以称为调度时延，且调度时延不能小于BWP切换时延。
举例来说，如图2所示，在时隙n，终端设备在BWP1中通过PDCCH接收到DCI，该DCI指示终端设备在n+2时隙通过BWP 2接收PDSCH。假设BWP1和BWP2的子载波间隔都是15kHz，终端设备支持的BWP切换能力为类型1，那么该例子中，BWP切换时延为1个时隙，调度时延为2个时隙。
由于目前的协议中，终端设备在BWP切换过程内不能进行数据传输，降低了数据吞吐率。本申请实施例提供一种方法，可以提高数据传输效率，提高数据吞吐率。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请实施例中，以网络设备与终端设备之间交互为例进行说明，网络设备执行的操作也可以由网络设备内部的芯片或模块执行，终端设备执行的操作也可以由终端设备内部的芯片或模块执行。
结合前面的描述，如图3所示，为本申请实施例提供的一种数据传输方法流程示意图。该方法包括：
可选地，S301：网络设备在第一频域资源中向终端设备发送第一信息。
可选的，S302：终端设备在第一频域资源中接收来自网络设备的第一信息。
第一信息可以指示终端设备切换到第二频域资源。需要说明的是，第一信息可能并不是直接指示终端设备进行切换，第一信息可能包括第二频域资源的第二标识，当终端设备确定第一频域资源的第一标识和第一信息包括的第二标识不同时，则可以确定需要切换到第二标识对应的第二频域资源。
第一信息可以通过DCI或者RRC信令或者媒体接入控制(medium access control，MAC)控制元素(control element，CE)或者系统广播消息发送至终端设备，具体实现方式，本申请实施例对此并不限定。
网络设备还可以向终端设备发送第二信息，第二信息指示终端设备切换到第二频域资 源之后，在指定时刻在第二频域资源中传输数据。其中，第二信息可以指示终端设备在第二频域资源的PDSCH中接收数据，也可以指示终端设备在第二频域资源的PUSCH中发送数据。
需要说明的是，第一信息和第二信息可以通过一条消息携带，例如都通过一条DCI携带，也可以通过两条消息分别携带，例如通过两条DCI携带，本申请对此并不限定。
本申请实施例中，频域资源可以是指一段连续的频率资源，例如可以是指BWP，或者类似于BWP的频域资源。
需要说明的是，在本申请实施例中，如果频域资源是指BWP，由第一频域资源切换到第二频域资源，除了可称之为BWP切换之外，还可以称之为BWP跳频或者BWP滑动或者BWP重调或者射频重调，以上说法均可认为是等效的。
本申请实施例中，第一频域资源和第二频域资源对应的配置参数有以下至少一项不同，就可以认为这两个频域资源是不相同的：
第一频域资源的索引值和第二频域资源的索引值不同；
第一频域资源的频域位置和第二频域资源的频域位置不同；
第一频域资源对应的中心频点和第二频域资源对应的中心频点不同；
第一频域资源对应的子载波间隔(subcarrier spacing，SCS)和第二频域资源对应的SCS不同；
第一频域资源对应的多输入所输出(multiple input multiple output，MIMO)数据传输层数或者天线数和第二频域资源对应的MIMO数据传输层数或者天线数不同；
第一频域资源对应的物理信道配置和第二频域资源对应的物理信道配置不同，物理信道包括以下一项或多项：物理下行控制信道(physical downlink control channel，PDCCH)；PDSCH；物理上行控制信道(physical uplink control channel，PUCCH)；物理上行共享信道(physical uplink shared channel，PUSCH)。
本申请实施例中，网络设备指示终端设备进行频域资源切换时，会存在一个时长用于终端设备执行频域资源切换，该时长可以称为第一时间单元。但是终端设备执行频域资源切换所需的频域资源切换时延小于或等于该时长，即小于或等于第一时间单元，因此在本申请实施例中，第一时间单元内，除了完成频域资源切换所需的时间外，其它时间可以用于进行数据传输。
S303：终端设备在第一时间单元包括的第二时间单元中从第一频域资源切换到第二频域资源，并在第一时间单元中除第二时间单元之外的时间中在第一频域资源和/或第二频域资源上进行数据传输。
在本申请实施例中，“数据传输”一词可以表示发送数据，也可以表示接收数据，还可以表示发送数据和接收数据，其中数据包括控制信令和业务数据，具体所表示的含义，可以根据实际的应用场景确定。如果表示发送数据，那么终端设备可以在第一频域资源和/或第二频域资源中向网络设备发送数据；如果表示接收数据，那么终端设备可以在第一频域资源和/或第二频域资源中接收来自网络设备的数据。
所述第二时间单元是指终端设备从第一频域资源切换到第二频域资源实际所需要的时间。
S304：网络设备在第一时间单元中除第二时间单元之外的时间中在第一频域资源和/或第二频域资源上进行数据传输。
需要说明的是，本步骤中的数据传输是指网络设备在第一时间单元中除第二时间单元之外的时间中可以在第一频域资源和/或第二频域资源上进行数据传输，终端设备具有在第一时间单元内进行数据传输的能力，但不代表终端设备一定会在第一时间单元内进行数据传输。如果在第一时间单元内，没有需要传输的数据，那么终端设备在第一时间单元内可以不进行数据传输。
一种可能的场景中，网络设备在发送第一信息之前，调度终端设备在第一频域资源中进行数据传输。例如，如图4所示，网络设备可以在时隙n-2中，通过调度信息调度终端设备在时隙n和时隙n+1内进行数据传输，n是整数，例如可以为0或1，具体取值并不限定。在终端设备数据传输结束之前，网络设备又需要指示终端设备切换到第二频域资源，例如，图4中，网络设备在时隙n中发送第一信息，指示终端设备在时隙n+2的起始时刻之前切换到第二频域资源。本申请实施例中，在第一信息发送时刻之后，在终端设备切换到第二频域资源之前，调度在第一频域资源中传输的数据，可以继续在第一时间单元内通过第一频域资源和/或第二频域资源传输。也就是说，终端设备在第一时间单元内传输的数据，可以为网络设备在发送第一信息之前，调度终端设备在第一频域资源内传输的数据。
终端设备可以自主确定是否在第一时间单元内进行数据传输，也可以根据网络设备的指示确定是否在第一时间单元内进行数据传输。例如，网络设备可以发送第三信息，第三信息指示在第一时间单元除第二时间单元之外的时间中通过第一频域资源和/或第二频域资源进行数据传输。需要说明的是，第三信息可能并没有调度终端设备传输新的数据，而是调度终端设备将原来在第一时间单元中需要通过第一频域资源单元传输的数据，第一频域资源和/或第二频域资源传输。
第一信息和第三信息可以通过一条消息携带，也可以通过两条消息分别携带，本申请对此并不限定。
另一种可能的场景中，在第一时间单元中除第二时间单元之外的时间中，网络设备还可以配置终端设备在第一频域资源或者第二频域资源上监听PDCCH，网络设备可以通过所述PDCCH向终端设备发送DCI，所述DCI调度终端设备在第一频域资源或者第二频域资源上进行PDSCH或者PUSCH数据传输。需要说明的是，所述PDSCH或者PUSCH数据传输的时域位置不作限定，既可以在第一时间单元中除第二时间单元之外的时间，也可以在第一时间单元之后的时间。终端设备根据接收的所述DCI，进行所述PDSCH或者PUSCH数据传输。在第一时间单元中除第二时间单元之外的时间中，除了所述PDCCH、PDSCH、PUSCH信道传输外，终端设备还可以在第一频域资源或者第二频域资源上进行其他信道或者信号的传输，例如PUCCH、物理随机接入信道(physical random access channel，PRACH)、同步信号块(synchronization signal block，SSB)、信道状态信息下行信号(channel state information reference signal，CSI-RS)、探测参考信号(sounding reference signal，SRS)等。
在本申请实施例中，第一时间单元表示一段时长，可以包括至少一个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号或时隙(slot)等。
同样的，第二时间单元表示一段时长，第二时间单元小于或等于第一时间单元，且大于或等于终端设备的切换时延。例如，当频域资源为BWP时，终端设备的切换时延可以是指BWP切换时延。为了描述方便，本申请实施例中，将OFDM符号简称为符号。
第一时间单元的具体长度以及起始时刻，可以由网络设备配置，也可以预先约定，本 申请实施例并不限定。举例来说，第一种可能的实现方式中，第一时间单元的长度为预设时长，具体可以是由网络设备预先配置，也可以是由协议约定，本申请对此并不限定。
在该实现方式中，如果存在S301，终端设备可以根据第一信息确定第一时间单元的位置。举例来说，终端设备可以将接收第一信息的时刻或者接收第一信息的时刻之后的时刻作为第一时间单元的起始时刻；相应的，终端设备将位于第一时间单元的起始时刻之后，且与第一时间单元的起始时刻的间隔为预设时长的时刻，作为第一时间单元的结束时刻。
例如，终端设备在时隙n中的第1个符号接收第一信息，预设时长为2个时隙，终端设备可以将时隙n中第1个符号的结束时刻作为第一时间单元的起始时刻，将时隙n+2中第1个符号的结束时刻作为第一时间单元的结束时刻。
再举例来说，终端设备还可以将接收第一信息的时隙的起始时刻作为第一时间单元的起始时刻。例如，终端设备在时隙n中的第3个符号接收第一信息，预设时长为2个时隙，终端设备可以将时隙n的起始时刻作为第一时间单元的起始时刻，将时隙n+2的起始时刻作为第一时间单元的结束时刻。
在该实现方式中，如果不存在S301，终端设备进行基于定时器的频域资源切换，则可以将定时器超时的时刻作为第一时间单元的起始时刻，将位于定时器超时的时刻之后，且与定时器超时的时刻的间隔为预设时长的时刻，作为第一时间单元的结束时刻。
需要说明的是，基于定时器的频域资源切换的具体过程，可以参考前面描述的基于定时器的BWP切换，在此不再赘述。
第二种可能的实现方式中，第一信息还可以指示第一时间单元的长度、起始时刻以及结束时刻中的至少一项。
例如，终端设备在时刻1接收到第一信息，第一信息指示终端设备在时刻2完成切换。此时可以将时刻2作为第一时间单元的结束时刻，将接收第一信息的时刻或者接收第一信息的时刻之后的时刻作为第一时间单元的起始时刻。
再例如，终端设备在时刻1接收到第一信息，第一指示信息指示将接收第一信息的时刻作为第一时间单元的起始时刻，并指示第一时间单元的长度为2个时隙。
需要说明的是，第一信息如果指示第一时间单元的结束时刻，那么可以将接收到第一信息的时刻至第一时间单元的结束时刻之间的任一时刻作为第一时间单元的起始时刻，只要保证第一时间单元的时长大于频域资源的切换时延即可。
以上只是示例，第一信息还可能存在其他方式指示第一时间单元的长度、起始时刻以及结束时刻，在此不再逐一列举。
第三种可能的实现方式中，网络设备还可以根据第二信息确定第一时间单元的长度、起始时刻以及结束时刻。由于第二信息指示终端设备在指定时刻在第二频域资源中传输数据，可以将该指定时刻作为第一时间单元的结束时刻。在该情况下，第一时间单元的起始时刻可以位于接收到第一信息或第二信息的时刻至指定时刻之间，只要保证第一时间单元的时长大于频域资源的切换时延即可。
举例来说，终端设备在时隙n接收到第一信息和第二信息，第二信息指示终端设备在时隙n+2的起始时刻在第二频域资源的PDSCH中接收数据，那么可以将时隙n+2的起始时刻作为第一时间单元的结束时刻。
以上只是示例，第一时间单元的长度、起始时刻以及结束时刻还可以通过其他方式确定，在此不再逐一举例说明。
本申请实施例中，终端设备可以在第一时间单元包括的第二时间单元内进行频域资源切换。第二时间单元在第一时间单元内的具体位置，可能存在多种实现方式。一种实现方式中，可以由终端设备自主确定，终端设备可以将第一时间单元起始时刻至结束时刻内的任一时刻作为第二时间单元的起始时刻，只需要保证留有足够的时间进行频域资源切换即可。
另一种实现方式中，第二时间单元在第一时间单元中的位置由网络设备指示，其中所述网络设备指示可以通过以下信令发送：DCI或者RRC信令或者MAC CE或者系统广播消息，或者，第二时间单元在第一时间单元中的位置的为预设的。
下面通过不同的举例说明第一时间单元和第二时间单元之间的位置关系。
实现方式一，第一时间单元的起始时刻和第二时间单元的起始时刻重合。
在该实现方式中，终端设备接收到第一信息之后，开始进行频域资源切换过程，在完成频域资源切换后，在第一时间单元的结束时刻之前的时间内，终端设备可以在第二频域资源上进行上行或者下行数据传输。
如果网络设备调度终端设备在第一时间单元内，在第一频域资源上进行数据传输，此时，终端设备可以将原本在第一时间单元内在第一频域资源上传输的数据，在第一时间单元中除第二时间单元之外的时间，切换到第二频域资源上传输。
如前所述，网络设备可以通过第三信息指示终端设备切换到第二频域资源上传输，也可以由终端设备自主确定或者预定义的。
可选地，当终端设备在第二频域资源上进行数据传输时，一种实施方法中，终端设备在第二频域资源上传输原来在第一频域资源上调度的数据时，除了频域资源分配信息外，其他调度信息均与在第一频域资源上接收到的调度信息相同，即调度信息中的调制编码方案、时域资源分配信息、混合自动重传请求(hybrid automatic repeat request，HARQ)进程号等信息相同。进一步地，对于频域资源分配信息，终端设备在第二频域资源上传输时的频域资源相对位置可以与在第一频域资源上接收到的调度信息中的频域分配信息相同。
另一种实施方法中，网络设备也可以通过信令指示终端设备在第二频域资源上传输原来在第一频域资源上调度的数据时所使用的调度信息，例如可以重新指示传输的调制编码方案、时域资源信息、频域资源信息等信息。另一种实施方法中，可以预定义终端设备在第二频域资源上传输数据时的调度信息，此时终端设备根据预定义的调度信息在第二频域资源上传输原来在第一频域资源上调度的数据。
结合前面的描述，举例来说，如图5所示，终端设备在时隙n之前工作在第一频域资源，并在时隙n的前三个符号中接收到DCI，DCI包括第一信息、第二信息和第三信息，其中，第二信息指示终端设备在时隙n+2在第二频域资源上进行PDSCH或者PUSCH传输。假设第一时间单元的起始时刻为接收到DCI的时刻，第一时间单元的结束时刻为时隙n+1的结束时刻(或者时隙n+2的起始时刻)。第二时间单元的起始时刻也为接收到DCI的时刻，第二时间单元的结束时刻位于第一时间单元的结束时刻之前，具体位置并不限定，只要保证第二时间单元的时长大于或等于频域资源的切换时延即可。
在时隙n和时隙n+1上，网络设备已经调度该终端设备在第一频域资源上进行PDSCH或者PUSCH传输。则终端设备在接收到该DCI之后，立即开始进行频域资源切换，在切换到第二频域资源之后，在时隙n+2之前，在第二频域资源上传输数据，该数据为原来调度在时隙n和时隙n+1内，在第一频域资源上调度的数据。在时隙n+2上，终端设备在第 二频域资源中传输第二信息调度的PDSCH或者PUSCH数据。
进一步地，除了以上所述可以将原本在第一时间单元内在第一频域资源上传输的数据，在第一时间单元中除第二时间单元之外的时间，切换到第二频域资源上传输之外，网络设备同样可以在第一时间单元中除第二时间单元之外的时间，在第二频域资源上指示终端设备进行新的PDSCH或者PUSCH数据传输或者PDCCH或者PUCCH信道传输。一种实施方式中，在第一时间单元中除第二时间单元之外的时间，网络设备可以配置终端设备在第二频域资源上监听PDCCH资源，网络设备可以在第二频域资源上通过所述PDCCH向终端设备发送DCI，所述DCI调度终端设备在BWP2上进行PDSCH或者PUSCH数据传输，需要说明的是，所述PDSCH或者PUSCH数据传输的时域位置不作限定，既可以在第一时间单元中除第二时间单元之外的时间，也可以在第一时间单元之后的时间。终端设备根据接收的所述DCI，进行所述PDSCH或者PUSCH数据传输。
实现方式二，第一时间单元的结束时刻和第二时间单元的结束时刻重合。
在该实现方式中，如果网络设备调度终端设备在第一时间单元内，在第一频域资源上进行数据传输，此时，终端设备接收到第一信息之后，可以在第一时间单元的最后位置预留第二时间单元对应的时长，用于进行频域资源切换；在进行频域资源切换之前的一段时间内可以继续在第一频域资源上进行数据传输。
举例来说，如图6所示，终端设备在时隙n之前工作在第一频域资源，并在时隙n的前三个符号中接收到DCI，DCI包括第一信息、第二信息和第三信息，其中，第二信息指示终端设备在时隙n+2在第二频域资源上进行PDSCH或者PUSCH传输。假设第一时间单元的起始时刻为接收到DCI的时刻，第一时间单元的结束时刻为时隙n+1的结束时刻(或者时隙n+2的起始时刻)。第二时间单元的结束时刻也为时隙n+1的结束时刻，第二时间单元的起始时刻位于第一时间单元的起始时刻之后，具体位置并不限定，只要保证第二时间单元的时长大于或等于频域资源的切换时延即可。
终端设备在接收到该DCI之后，继续在第一频域资源上进行数据传输，直到在第二时间单元的起始时刻停止数据传输，并进行频域资源切换。在切换到第二频域资源之后，在时隙n+2上，终端设备在第二频域资源中传输第二信息调度的PDSCH或者PUSCH数据。
实现方式三，第一时间单元的起始时刻不与第二时间单元的起始时刻重合，且第一时间单元的结束时刻不与第二时间单元的结束时刻重合。
该实现方式中，终端设备接收到第一信息之后，在第二时间单元的起始时刻之前，可以在第一频域资源进行数据传输；在第二时间单元的结束时刻之后，在第一时间单元的结束时刻之前，可以在第二频域资源进行数据传输。
具体的，如果网络设备调度终端设备在第一时间单元内，在第一频域资源上进行数据传输。此时，在第二时间单元的起始时刻之前，终端设备可以继续在第一频域资源上传输的数据；在完成频域资源切换之后，即在第二时间单元的结束始时刻，终端设备可以将原本在第一时间单元内在第一频域资源上传输的数据，切换到第二频域资源上传输。
举例来说，如图7所示，终端设备在时隙n之前工作在第一频域资源，并在时隙n的前三个符号中接收到DCI，DCI包括第一信息、第二信息和第三信息，其中，第二信息指示终端设备在时隙n+2在第二频域资源上进行PDSCH或者PUSCH传输。假设第一时间单元的起始时刻为接收到DCI的时刻，第一时间单元的结束时刻为时隙n+1的结束时刻(或 者时隙n+2的起始时刻)。第二时间单元的起始时刻为时刻1，第二时间单元的结束时刻为时刻2。时刻1和时刻2均位于第一时间单元内。
终端设备在接收到该DCI之后，继续在第一频域资源上进行数据传输，直到时刻1停止数据传输，并进行频域资源切换。在切换到第二频域资源之后，在时刻2，在第二频域资源中传输原来调度在第一频域资源传输的数据。在时隙n+2上，终端设备在第二频域资源中传输第二信息调度的PDSCH或者PUSCH数据。
进一步地，在第一时间单元中除第二时间单元之外的时间中，网络设备还可以配置终端设备在第一频域资源或者第二频域资源上监听PDCCH，网络设备可以通过所述PDCCH向终端设备发送DCI，所述DCI调度终端设备在第二频域资源上进行PDSCH或者PUSCH数据传输。需要说明的是，所述PDSCH或者PUSCH数据传输的时域位置不作限定，既可以在第一时间单元中除第二时间单元之外的时间，也可以在第一时间单元之后的时间。终端设备根据接收的所述DCI，进行所述PDSCH或者PUSCH数据传输。
本申请实施例中，当第一信息通过DCI携带，频域资源为BWP时，还可以引入一种更短的BWP切换。
假设当终端设备在下行时间单元n通过BWP1接收网络设备发送DCI，该DCI指示BWP2，并且同时调度在BWP2中进行PDSCH或者PUSCH传输，终端设备进行BWP切换的时延可以称为第一切换时延，第三代伙伴计划(the 3rd generation partnership project，3GPP)协议中定义的BWP切换时延可以称为第二切换时延。第一切换时延小于第二切换时延，具体的，第一切换时延可以存在以下任一实现方式：
实现方式一，第一切换时延与子载波间隔(subcarrier spacing，SCS)等参数没有对应关系，即无论SCS取哪些具体值，第一切换时延都为一个值，且第一切换时延小于表1中最小的BWP切换时延。
实现方式二，类似于表1中的BWP切换时延，第一切换时延对应不同的SCS可以取值不同。例如当SCS分别为15KHz、30KHz、60KHz、120KHz时，第一切换时延可以对应不同的取值。当第一切换时延和第二切换时延对应相同的SCS时，第一切换时延小于第二切换时延。
举例来说，对应不同的SCS时，第一切换时延的取值可以如表2所示。
表2
Figure PCTCN2022077880-appb-000002
其中，μ是终端设备工作的子载波间隔对应的参数。通过比较表1和表2可知，表2中，当第一切换时延和第二切换时延对应相同的SCS时，第一切换时延均小于第二切换时延。
实现方式三，类似于表1中的BWP切换时延，第一切换时延对应不同的SCS可以取值不同；存在至少一个SCS，在第一切换时延和第二切换时延对应至少一个SCS中的SCS时，第一切换时延小于第二切换时延。
举例来说，对应不同的SCS时，第一切换时延的取值可以如表3所示。
表3
Figure PCTCN2022077880-appb-000003
通过比较表1和表3可知，表3中，SCS＝15KHz或60KHz或120KHz时，第一切换时延等于第二切换时延；SCS＝30KHz时，第一切换时延小于第二切换时延。
以上只是示例，还可能存在其他实现方式，在此不再赘述。
由于BWP切换时间更短，终端设备可以更快切换到其他BWP上进行，以获得更大的频率分集增益以及负载均衡增益。并且由于BWP切换时间更短，则由BWP切换造成的数据传输中断时间更短，降低了BWP切换对终端设备数据传输的影响，有利于提高终端设备的数据传输速率。同时还可以快速地对增强移动宽带(enhanced mobile broadband，eMBB)或者超高可靠低时延(ultra-high reliability and low latency，URLLC)业务进行避让，保证更高优先级业务的传输性能。
本申请实施例还提供一种数据传输方法，可以降低频域资源切换导致的数据传输中断时长，提高数据传输效率。
如图8所示，为本申请实施例提供的一种数据传输方法流程示意图。该方法包括：
S801：网络设备在第一频域资源中向终端设备发送控制信息。
S802：终端设备在第一频域资源中接收来自网络设备的控制信息。
其中，控制信息指示在第二频域资源进行数据传输，并指示数据传输的起始时刻；
S803：终端设备根据控制信息切换到第二频域资源，并在第二频域资源进行数据传输。
S804：网络设备在第二频域资源与终端设备进行数据传输。
其中，进行频域资源切换的结束时刻与控制信息指示的数据传输的起始时刻重合(或相同)。
一种实现方式中，进行频域资源切换的起始时刻与控制信息指示的数据传输的起始时刻之间的时长大于或等于终端设备进行频域资源切换所需的频域资源切换时延。
需要说明的是，终端设备进行频域资源切换所需的频域资源切换时延，可以通过多种方式确定，例如可以通过表1确定。
一种实现方式中，接收或发送控制信息的时刻与控制信息指示的数据传输的起始时刻之间的时长大于或等于终端设备进行频域资源切换所需的频域资源切换时延。例如，如图9所示，网络设备在时隙n中的符号5发送控制信息，数据传输的起始时刻为时隙n+1的起始时刻，时隙n中的符号5的起始时刻至时隙n+1的起始时刻之间的时长可以等于进行频域资源切换所需的频域资源切换时延，在该时长内，终端设备进行频域资源切换。
一种实现方式中，包括该控制信息的DCI可以在一个时隙中的任意位置进行传输，例如一个时隙包括13个符号，DCI可以在其中任一符号内，具体根据实际情况确定。进一步地，终端设备接收到DCI的时隙和终端设备根据DCI完成频域资源切换的时隙为同一个时隙，且终端设备完成频域资源切换的时刻为该时隙的结束时刻(或者称为尾边界)，在该情况下，终端设备接收该DCI的时刻至接收该DCI的时隙的结束时刻可以等于终端设备所 需的频域资源切换时延，这样终端设备在一个时隙中接收到DCI时，立即进行频域资源切换，切换完成的时刻正好为该时隙的结束时刻。或者，监听该DCI的控制资源集合(control resource set，CORESET)和频域资源切换时延，整体与该DCI所处的时隙的结束时刻(或者称为尾边界)对齐。或者，频域资源切换时延与该时隙尾边界对齐，终端设备在一个时隙中接收到DCI的时刻，不晚于位于该时隙的结束时刻之前的特定时刻，该特定时刻距离该时隙的结束时刻之间的时长为频域资源切换时延。
例如，如图10所示，网络设备在时隙n中的符号6发送控制信息，数据传输的起始时刻为时隙n+2的起始时刻，时隙n中的符号6的起始时刻至时隙n的结束时刻之间的时长等于进行频域资源切换所需的频域资源切换时延，在该时长内，终端设备进行频域资源切换。
通过上述方法，DCI可以在时隙中的任意位置进行发送和接收，因此通过DCI触发的频域资源切换更加灵活。另外完成频域资源切换的时刻与时隙尾边界对齐，可以避免频域资源切换跨越多个时隙，从而可以保证在该时隙的下一个时隙中有一个完整的时隙可以用于数据传输，由于终端设备是按照时隙粒度进行数据传输，因此有利于终端设备的信号接收检测实现。
上述各个实施例可以分别单独实施，或者也可以相互结合实施。上文中，在不同实施例中，侧重描述了各个实施例的区别之处，除区别之处的其它内容，不同实施例之间的其它内容可以相互参照。实施例所描述的各个流程图的步骤编号仅为执行流程的一种示例，并不构成对步骤执行的先后顺序的限制，本申请实施例中相互之间没有时序依赖关系的步骤之间没有严格的执行顺序。此外，各个流程图中所示意的步骤并非全部是必须执行的步骤，可以根据实际需要在各个流程图的基础上增添或者删除部分步骤。
上述本申请提供的实施例中，分别从各个设备之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，接入网设备或终端设备可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
与上述构思相同，如图11所示，本申请实施例还提供一种装置1100用于实现上述方法中接入网设备或终端设备的功能。例如，该装置可以为软件模块或者芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。该装置1100可以包括：处理单元1101和通信单元1102。
本申请实施例中，通信单元也可以称为收发单元，可以包括发送单元和/或接收单元，分别用于执行上文方法实施例中接入网设备或终端设备发送和接收的步骤。
以下，结合图11至图12详细说明本申请实施例提供的通信装置。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，这里不再赘述。
通信单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处 理单板，处理模块、处理装置等。可选的，可以将通信单元1102中用于实现接收功能的器件视为接收单元，将通信单元1102中用于实现发送功能的器件视为发送单元，即通信单元1102包括接收单元和发送单元。通信单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
通信装置1100执行上面实施例中图3所示的流程中终端设备的功能时：
通信单元，用于在第一频域资源中接收来自网络设备的第一信息，所述第一信息指示切换到第二频域资源；
处理单元，用于根据所述第一信息确定第一时间单元，其中，所述第一时间单元包括第二时间单元；在所述第二时间单元中从第一频域资源切换到第二频域资源；
所述通信单元，用于在所述第一时间单元中除所述第二时间单元之外的时间中在所述第一频域资源和/或所述第二频域资源上进行数据传输。
通信装置1100执行上面实施例中图3所示的流程中网络设备的功能时：
处理单元，用于通过通信单元在第一频域资源中向终端设备发送第一信息，所述第一信息指示切换到第二频域资源；
所述处理单元，用于通过所述通信单元在第一时间单元中除第二时间单元之外的时间中在所述第一频域资源和/或所述第二频域资源上进行数据传输；
其中，所述第一信息指示所述第一时间单元，所述第一时间单元包括第二时间单元，所述第二时间单元用于从所述第一频域资源切换到所述第二频域资源。
以上只是示例，处理单元1101和通信单元1102还可以执行其他功能，更详细的描述可以参考图3所示的方法实施例中相关描述，这里不加赘述。
通信装置1100还可以执行图8所示的方法，这里不加赘述。
如图12所示为本申请实施例提供的装置1200，图12所示的装置可以为图11所示的装置的一种硬件电路的实现方式。该通信装置可适用于前面所示出的流程图中，执行上述方法实施例中终端设备或者接入网设备的功能。为了便于说明，图12仅示出了该通信装置的主要部件。
如图12所示，通信装置1200包括处理器1210和接口电路1220。处理器1210和接口电路1220之间相互耦合。可以理解的是，接口电路1220可以为收发器、管脚、接口电路或输入输出接口。可选的，通信装置1200还可以包括存储器1230，用于存储处理器1210执行的指令或存储处理器1210运行指令所需要的输入数据或存储处理器1210运行指令后产生的数据。
当通信装置1200用于实现图6所示的方法时，处理器1210用于实现上述处理单元1101的功能，接口电路1220用于实现上述通信单元1102的功能。
通信装置1200还可以执行图8所示的方法，这里不加赘述。
当上述通信装置为应用于终端设备的芯片时，该终端设备芯片实现上述方法实施例中终端设备的功能。该终端设备芯片从终端设备中的其它模块(如射频模块或天线)接收信息，该信息是接入网设备发送给终端设备的；或者，该终端设备芯片向终端设备中的其它模块(如射频模块或天线)发送信息，该信息是终端设备发送给接入网设备的。
当上述通信装置为应用于接入网设备的芯片时，该接入网设备芯片实现上述方法实施例中接入网设备的功能。该接入网设备芯片从接入网设备中的其它模块(如射频模块或天 线)接收信息，该信息是终端设备发送给接入网设备的；或者，该接入网设备芯片向接入网设备中的其它模块(如射频模块或天线)发送信息，该信息是接入网设备发送给终端设备的。
可以理解的是，本申请的实施例中的处理器可以是中央处理单元，还可以是其它通用处理器、数字信号处理器、专用集成电路或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中存储器可以是随机存取存储器、闪存、只读存储器、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器、寄存器、硬盘、移动硬盘或者本领域熟知的任何其它形式的存储介质中。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (35)

  1. 一种数据传输方法，其特征在于，所述方法适用于终端设备，包括：
    在第一频域资源中接收来自网络设备的第一信息，所述第一信息指示切换到第二频域资源；
    根据所述第一信息确定第一时间单元，其中，所述第一时间单元包括第二时间单元；
    在所述第二时间单元中从第一频域资源切换到第二频域资源，并在所述第一时间单元中除所述第二时间单元之外的时间中在所述第一频域资源和/或所述第二频域资源上进行数据传输。
  2. 根据权利要求1所述的方法，其特征在于，所述在所述第一时间单元中通过所述第一频域资源和/或所述第二频域资源中进行数据传输，包括：
    在第一时间单元的起始时刻至第二时间单元的起始时刻之间，在所述第一频域资源进行数据传输；
    和/或，在第二时间单元的结束时刻至所述第一时间单元的结束时刻之间，在所述第二频域资源进行数据传输。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一时间单元的起始时刻位于接收所述第一信息的时刻之后；
    所述第一信息还指示所述第一时间单元的长度、起始时刻以及结束时刻中的至少一项。
  4. 根据权利要求1至3任一所述的方法，其特征在于，所述方法还包括：
    接收来自所述网络设备的第二信息，所述第二信息指示在指定时刻在所述第二频域资源中传输数据，且所述第二信息与第一信息包括于同一条消息中；
    所述第一时间单元的结束时刻为所述第二信息指示的所述指定时刻。
  5. 根据权利要求1至4任一所述的方法，其特征在于，所述方法还包括：
    接收来自所述网络设备的第三信息，所述第三信息指示在所述第一时间单元除所述第二时间单元之外的时间中通过所述第一频域资源和/或所述第二频域资源进行传输。
  6. 根据权利要求1至5任一所述的方法，其特征在于，所述方法还包括：
    所述第二时间单元在所述第一时间单元中的位置由所述网络设备指示；
    或者，所述第二时间单元在所述第一时间单元中的位置为预设的。
  7. 根据权利要求1至6任一所述的方法，其特征在于，所述第一时间单元的起始时刻和所述第二时间单元的起始时刻重合，或者所述第一时间单元的结束时刻和所述第二时间单元的结束时刻重合。
  8. 根据权利要求1至7任一所述的方法，其特征在于，所述第一频域资源和所述第二频域资源的索引值不同，或者，所述第一频域资源和所述第二频域资源的索引值相同，频域位置不同。
  9. 一种数据传输方法，其特征在于，所述方法适用于网络设备，包括：
    在第一频域资源中向终端设备发送第一信息，所述第一信息指示切换到第二频域资源；
    在第一时间单元中除第二时间单元之外的时间中在所述第一频域资源和/或所述第二频域资源上进行数据传输；
    其中，所述第一信息指示所述第一时间单元，所述第一时间单元包括第二时间单元，所述第二时间单元用于从所述第一频域资源切换到所述第二频域资源。
  10. 根据权利要求9所述的方法，其特征在于，所述在所述第一时间单元中通过所述第一频域资源和/或所述第二频域资源中进行数据传输，包括：
    在第一时间单元的起始时刻至第二时间单元的起始时刻之间，在所述第一频域资源进行数据传输；
    和/或，在第二时间单元的结束时刻至所述第一时间单元的结束时刻之间，在所述第二频域资源进行数据传输。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第一时间单元的起始时刻位于接收所述第一信息的时刻之后；
    所述第一信息还指示所述第一时间单元的长度、起始时刻以及结束时刻中的至少一项。
  12. 根据权利要求9至11任一所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第二信息，所述第二信息指示在指定时刻在所述第二频域资源中传输数据，且所述第二信息与第一信息包括于同一条消息中；
    所述第一时间单元的结束时刻为所述第二信息指示的所述指定时刻。
  13. 根据权利要求9至12任一所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第三信息，所述第三信息指示在所述第一时间单元除所述第二时间单元之外的时间中通过所述第一频域资源和/或所述第二频域资源进行传输。
  14. 根据权利要求9至13任一所述的方法，其特征在于，所述方法还包括：
    所述第二时间单元在所述第一时间单元中的位置由所述网络设备指示；
    或者，所述第二时间单元在所述第一时间单元中的位置为预设的。
  15. 根据权利要求9至14任一所述的方法，其特征在于，所述第一时间单元的起始时刻和所述第二时间单元的起始时刻重合，或者所述第一时间单元的结束时刻和所述第二时间单元的结束时刻重合。
  16. 根据权利要求9至15任一所述的方法，其特征在于，所述第一频域资源和所述第二频域资源的索引值不同，或者，所述第一频域资源和所述第二频域资源的索引值相同，频域位置不同。
  17. 一种通信装置，其特征在于，包括：
    通信单元，用于在第一频域资源中接收来自网络设备的第一信息，所述第一信息指示切换到第二频域资源；
    处理单元，用于根据所述第一信息确定第一时间单元，其中，所述第一时间单元包括第二时间单元；在所述第二时间单元中从第一频域资源切换到第二频域资源；
    所述通信单元，用于在所述第一时间单元中除所述第二时间单元之外的时间中在所述第一频域资源和/或所述第二频域资源上进行数据传输。
  18. 根据权利要求17所述的装置，其特征在于，所述通信单元具体用于：
    在第一时间单元的起始时刻至第二时间单元的起始时刻之间，在所述第一频域资源进行数据传输；
    和/或，在第二时间单元的结束时刻至所述第一时间单元的结束时刻之间，在所述第二频域资源进行数据传输。
  19. 根据权利要求17或18所述的装置，其特征在于，所述第一时间单元的起始时刻位于接收所述第一信息的时刻之后；
    所述第一信息还指示所述第一时间单元的长度、起始时刻以及结束时刻中的至少一项。
  20. 根据权利要求17至19任一所述的装置，其特征在于，所述通信单元还用于：
    接收来自所述网络设备的第二信息，所述第二信息指示在指定时刻在所述第二频域资源中传输数据，且所述第二信息与第一信息包括于同一条消息中；
    所述第一时间单元的结束时刻为所述第二信息指示的所述指定时刻。
  21. 根据权利要求17至20任一所述的装置，其特征在于，所述通信单元还用于：
    接收来自所述网络设备的第三信息，所述第三信息指示在所述第一时间单元除所述第二时间单元之外的时间中通过所述第一频域资源和/或所述第二频域资源进行传输。
  22. 根据权利要求17至21任一所述的装置，其特征在于，所述第二时间单元在所述第一时间单元中的位置由所述网络设备指示；
    或者，所述第二时间单元在所述第一时间单元中的位置为预设的。
  23. 根据权利要求17至22任一所述的装置，其特征在于，所述第一时间单元的起始时刻和所述第二时间单元的起始时刻重合，或者所述第一时间单元的结束时刻和所述第二时间单元的结束时刻重合。
  24. 根据权利要求17至23任一所述的装置，其特征在于，所述第一频域资源和所述第二频域资源的索引值不同，或者，所述第一频域资源和所述第二频域资源的索引值相同，频域位置不同。
  25. 一种通信装置，其特征在于，包括：
    处理单元，用于通过通信单元在第一频域资源中向终端设备发送第一信息，所述第一信息指示切换到第二频域资源；
    所述处理单元，用于通过所述通信单元在第一时间单元中除第二时间单元之外的时间中在所述第一频域资源和/或所述第二频域资源上进行数据传输；
    其中，所述第一信息指示所述第一时间单元，所述第一时间单元包括第二时间单元，所述第二时间单元用于从所述第一频域资源切换到所述第二频域资源。
  26. 根据权利要求25所述的装置，其特征在于，所述通信单元具体用于：
    在第一时间单元的起始时刻至第二时间单元的起始时刻之间，在所述第一频域资源进行数据传输；
    和/或，在第二时间单元的结束时刻至所述第一时间单元的结束时刻之间，在所述第二频域资源进行数据传输。
  27. 根据权利要求25或26所述的装置，其特征在于，所述第一时间单元的起始时刻位于接收所述第一信息的时刻之后；
    所述第一信息还指示所述第一时间单元的长度、起始时刻以及结束时刻中的至少一项。
  28. 根据权利要求25至27任一所述的装置，其特征在于，所述通信单元还用于：
    向所述终端设备发送第二信息，所述第二信息指示在指定时刻在所述第二频域资源中传输数据，且所述第二信息与第一信息包括于同一条消息中；
    所述第一时间单元的结束时刻为所述第二信息指示的所述指定时刻。
  29. 根据权利要求25至28任一所述的装置，其特征在于，所述通信单元还用于：
    向所述终端设备发送第三信息，所述第三信息指示在所述第一时间单元除所述第二时间单元之外的时间中通过所述第一频域资源和/或所述第二频域资源进行传输。
  30. 根据权利要求25至29任一所述的装置，其特征在于，所述第二时间单元在所述第一时间单元中的位置由所述网络设备指示；
    或者，所述第二时间单元在所述第一时间单元中的位置为预设的。
  31. 根据权利要求25至30任一所述的装置，其特征在于，所述第一时间单元的起始时刻和所述第二时间单元的起始时刻重合，或者所述第一时间单元的结束时刻和所述第二时间单元的结束时刻重合。
  32. 根据权利要求25至31任一所述的装置，其特征在于，所述第一频域资源和所述第二频域资源的索引值不同，或者，所述第一频域资源和所述第二频域资源的索引值相同，频域位置不同。
  33. 一种通信装置，其特征在于，包括处理器，收发器，和存储器；
    所述处理器，用于执行所述存储器中存储的计算机程序或指令，当执行所述计算机程序或指令时，使得所述通信装置实现权利要求1至8中任意一项所述的方法。
  34. 一种通信装置，其特征在于，包括处理器和存储器：
    所述处理器，用于执行所述存储器中存储的计算机程序或指令，当执行所述计算机程序或指令时，如权利要求9至16中任意一项所述的方法被执行。
  35. 一种计算机可读存储介质，其特征在于，存储有计算机程序或指令，当执行所述计算机程序或指令时，如权利要求1至16中任意一项所述的方法被执行。
PCT/CN2022/077880 2021-03-12 2022-02-25 一种数据传输方法及装置 Ceased WO2022188638A1 (zh)

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