WO2019091233A1 - 一种带宽切换方法及装置 - Google Patents

一种带宽切换方法及装置 Download PDF

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Publication number
WO2019091233A1
WO2019091233A1 PCT/CN2018/107100 CN2018107100W WO2019091233A1 WO 2019091233 A1 WO2019091233 A1 WO 2019091233A1 CN 2018107100 W CN2018107100 W CN 2018107100W WO 2019091233 A1 WO2019091233 A1 WO 2019091233A1
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WO
WIPO (PCT)
Prior art keywords
time
terminal device
bwp
indication information
target
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PCT/CN2018/107100
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English (en)
French (fr)
Inventor
张兴炜
冯淑兰
唐臻飞
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华为技术有限公司
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Publication of WO2019091233A1 publication Critical patent/WO2019091233A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—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

Definitions

  • the present application relates to the field of information technology, and in particular, to a bandwidth switching method and apparatus.
  • the single carrier bandwidth can reach 400MHz.
  • the single carrier bandwidth can be divided into several bandwidth parts (BWP).
  • the network device can configure the terminal device with multiple bandwidth portions and instruct the terminal device to activate one of the BWPs.
  • the present application provides a bandwidth switching method and apparatus for solving the problem of the prior art lacking a scheme for efficiently switching activated BWPs.
  • the present application provides a bandwidth switching method, which is applied to a communication system in which a bandwidth can be divided into a bandwidth part BWP.
  • the method includes: receiving, by a terminal device, downlink control information DCI sent by a network device, where the DCI can pass a physical downlink control channel.
  • the physical downlink control channel (PDCCH) is transmitted, and the DCI includes first indication information and second indication information, where the first indication information is used to instruct the terminal device to transmit target data, for example, instructing the terminal device to receive the network device to pass the physical downlink.
  • PDCCH physical downlink control channel
  • Target data sent by the channel or indicating that the terminal device sends the target data to the network device through the physical uplink channel, or instructs the terminal device to send the target data to the other terminal device through the physical edge channel; the second indication information is used to indicate the location
  • the terminal device switches the activated bandwidth part BWP to the target BWP, for example, instructs the terminal device to switch the activated downlink BWP to the target downlink BWP, or instructs the terminal device to switch the activated uplink BWP to the target uplink BWP, or indicates that the terminal device will BWP cut in the active side link direction Change to the target BWP.
  • the terminal device switches the activated BWP to the target BWP according to the second indication information.
  • the network device may send the DCI to the terminal device, and schedule the terminal device to perform data transmission, and instruct the terminal device to switch the activated BWP.
  • the data scheduling and the BWP switching indication are simultaneously implemented through one DCI, and the efficiency is high.
  • the first indication information is specifically used to indicate that the terminal device transmits target data in a first direction
  • the second indication information is specifically used to indicate that the terminal device
  • the BWP activated in the first direction is switched to the target BWP, and the first direction is an uplink direction, a downlink direction, or an edge link direction. Since the data scheduling in the same direction and the BWP switching indication can be simultaneously realized by one DCI, the efficiency is high.
  • the terminal device after the terminal device receives the DCI, the terminal device, according to the first indication information, at the first time indicated by the first indication information, in the first The target data is transmitted in one direction.
  • the first time may be indicated by the timing parameter in the first indication information, or the first indication information may not include the timing parameter, or the value of the timing parameter is defaulted, and the terminal device may use the preset duration as the receiving DCI.
  • the terminal device switches the BWP activated in the first direction to the target BWP at a second time according to the second indication information.
  • the second time may be indicated by the timing parameter in the second indication information, or the second indication information may not include the timing parameter, or the value of the timing parameter is defaulted, and the terminal device may use the preset duration as the receiving DCI.
  • the second indication information does not include the timing parameter, and the terminal device determines the second time according to a reservation with the network device, or the terminal device determines the second time according to a protocol that is consistent with the network device.
  • the second time is the first radio frame/first subframe/first slot/first minislot/first after the first time Symbols.
  • the terminal device transmits the target data on the original activated BWP first (at the first time), and then switches the activated BWP (at the second time) to avoid the target BWP being activated first, and then the target data is transmitted on the target BWP.
  • the RA in the first indication information cannot adapt to the target BWP, thereby causing the target data to be unable to be transmitted normally, and the sub-carrier spacing between the original activated BWP and the target BWP may be avoided.
  • the length of the time slot length in the original activated BWP and the target BWP is different, which in turn causes the time domain resource indication and the timing indication in the DCI to be in error.
  • the terminal device can switch the activated BWP in time after the transmission of the target data, thereby reducing the BWP switching time.
  • the terminal device when the first direction is a downlink direction, the terminal device sends an acknowledgement ACK message or a negative acknowledgement NACK message to the network device after receiving the target data at the first time, so that Let the network device know whether the data transmission is successful, and facilitate the network device to schedule the terminal device.
  • the terminal device when the first direction is an uplink direction, the terminal device receives an ACK sent by the network device after sending the target data in the first direction at a first time. A message or a NACK message to know if the target data was successfully transmitted.
  • the second time is a first radio frame/first subframe/first after the ACK message is sent by the terminal device.
  • the second time is a first radio frame/first subframe/first after the terminal device receives an ACK message.
  • Time slot / first mini time slot / first symbol the terminal device can perform the switching of the active BWP immediately after confirming whether the target data is successfully transmitted, and ensure the timeliness of the switching of the BWP as much as possible.
  • the second time is a first radio frame/first after the ACK message or the NACK message is sent by the terminal device.
  • the terminal device confirms that the target data is transmitted and switches the activated BWP, so that the terminal has switched to the target BWP when the target data is retransmitted after the target data transmission fails, and the original data is activated when the target data is retransmitted on the target BWP.
  • the difference between the BWP and the target BWP's bandwidth or subcarrier spacing results in failure of the target data retransmission.
  • the terminal device can switch the activated BWP in time after confirming that the target data transmission is successful, and reduce the time taken to activate the BWP.
  • the second time is a first radio frame/first after the terminal device receives any one of an ACK message or a NACK message. Subframe/first time slot/first minislot/first symbol.
  • the terminal device confirms that the target data is transmitted and switches the activated BWP, so that the terminal has switched to the target BWP when the target data is retransmitted after the target data transmission fails, and the original data is activated when the target data is retransmitted on the target BWP.
  • the difference between the BWP and the target BWP's bandwidth or subcarrier spacing results in failure of the target data retransmission.
  • the terminal device can switch the activated BWP in time after confirming that the target data transmission is successful, and reduce the time taken to activate the BWP.
  • the first indication information is specifically used to indicate that the terminal device transmits target data in a first direction at a first time;
  • the second indication information includes a timing parameter, where The timing parameter is used to indicate the second time;
  • the terminal device switches the activated BWP to the target BWP according to the second indication information, including: the terminal device activates the first direction at a second time
  • the BWP is switched to the target BWP.
  • the terminal device after the terminal device receives the DCI, if the second time is later than the first time, the terminal device passes the The BWP activated before the second time transmits the target data in the first direction.
  • the network device may set the second time of switching the BWP to be later than the first time of the transmission target data, thereby avoiding that the RA of the first indication information cannot be adapted to the target due to the difference between the originally activated BWP and the target BWP.
  • the BWP which in turn causes the target data to be unable to be transmitted normally, can also avoid that the length of the time slot of the original activated BWP and the target BWP is different due to the difference between the original activated BWP and the target BWP subcarrier spacing, thereby causing the time domain resource in the DCI. Both the indication and the timing indication are in error.
  • the terminal device after the terminal device receives the DCI, if the first time is later than the second time, the terminal device is activated at the first time The target BWP, transmitting the target data in the first direction.
  • the network device may set the first time later than the second time, so that the terminal device can switch the activated BWP in time, and the terminal device can transmit the target data on the target BWP after the handover, taking into account the transmission of the target data and Timeliness of BWP switching.
  • the terminal device after the terminal device receives the DCI, if the first time is later than the second time, the terminal device stops responding to the first indication information, to Avoid target data transfer failures.
  • the present application provides a bandwidth switching method, including: a network device sends a DCI to a terminal device, where the DCI includes first indication information and second indication information, where the first indication information is used to indicate the terminal device. Transmitting target data, the second indication information is used to instruct the terminal device to switch the activated bandwidth part BWP to the target BWP.
  • the first indication information is specifically used to indicate that the terminal device transmits target data in a first direction
  • the second indication information is specifically used to indicate that the terminal device
  • the BWP activated in the first direction is switched to the target BWP
  • the first direction is an uplink direction, a downlink direction, or an edge link direction.
  • the second indication information includes a timing parameter, where the timing parameter is used to indicate a second time, and the second indication information is specifically used to indicate that the terminal device is in the second The time switches the BWP activated in the first direction to the target BWP.
  • the network device further receives a response message sent by the terminal device indicating that the BWP handover is successful, so that the network device can communicate with the terminal device or schedule the terminal device by using the target BWP.
  • the present application provides an apparatus for switching bandwidth for performing the method of any of the above first aspect or any possible implementation of the first aspect.
  • the apparatus comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.
  • the present application provides an apparatus for switching bandwidth for performing the method of any of the above-described second aspect or any possible implementation of the second aspect.
  • the apparatus comprises means for performing the method of any of the possible implementations of the second aspect or the second aspect described above.
  • the present application provides a terminal device for performing the method in any of the above first aspect or any possible implementation of the first aspect.
  • the terminal device includes a processor, a memory, and a transceiver.
  • the memory is for storing computer instructions; the transceiver is for communicating with a network device or other terminal device; the processor is in communication with the memory and the transceiver for executing the computer instructions to perform the first aspect or the first The method in any possible implementation of the aspect.
  • the application provides a network device for performing the method in any of the possible implementations of the second aspect or the second aspect described above.
  • the network device includes a processor, a memory, and a transceiver.
  • the memory is for storing computer instructions; the transceiver is for communicating with a terminal device or other network device; the processor is in communication with the memory and the transceiver for executing the computer instructions to perform the second aspect or the second The method in any possible implementation of the aspect.
  • the present application provides a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform any of the first aspect or the first aspect The method in implementation.
  • the present application provides a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform any of the second or second aspects The method in implementation.
  • the present application provides a computer program product, when run on a computer, causes the computer to perform the method of the first aspect or any possible implementation of the first aspect.
  • the application provides a computer program product, when run on a computer, causes the computer to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • the present application provides a chip, the chip being coupled to a memory for reading and executing a software program stored in the memory to perform the first aspect or any possible implementation of the first aspect method.
  • the present application provides a chip connected to a memory for reading and executing a software program stored in the memory to perform the second aspect or any possible implementation of the second aspect method.
  • FIG. 4 FIG. 6 to FIG. 7, and FIG. 9 are schematic flowcharts of a method for switching bandwidth according to at least one embodiment of the present application;
  • FIG. 5, and FIG. 8 are schematic diagrams showing switching bandwidths in at least one embodiment of the present application.
  • 10-12 are schematic diagrams of an apparatus for switching bandwidth in at least one embodiment of the embodiments of the present application.
  • the present application provides a bandwidth switching method and apparatus for solving the problem of the prior art lacking a scheme for efficiently switching activated BWPs.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.
  • the plurality referred to in the present application means two or more.
  • the terms “first”, “second” and the like are used for the purpose of distinguishing the description, and are not to be construed as indicating or implying a relative importance, and are not to be construed as indicating or implying the order.
  • the term “and/or” in the present application is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B, there are three cases of B alone.
  • the character "/" in the present application generally indicates that the context of the context is an "or" relationship.
  • the terminal device may communicate with one or more core networks via a radio access network (RAN), and the terminal device may be referred to as an access terminal or a user equipment.
  • RAN radio access network
  • the terminal device may be referred to as an access terminal or a user equipment.
  • UE subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • cellular phones For example, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handhelds with wireless communication capabilities
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDAs personal digital assistants
  • a device a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a terminal device in a public land mobile network (PLMN) that is evolving in the future.
  • PLMN public land mobile network
  • the network device may be a device for communicating with the terminal device, for example, may be a base station (gNode B, gNB) in a 5G NR system, or may be a long term evolution (long term evolution).
  • Base station in an LTE system an evolutional Node B (eNB or e-NodeB), a global system for mobile communication (GSM) or a base station in code division multiple access (CDMA) (base transceiver station, BTS), may also be a base station (NodeB) in wideband CDMA (WCDMA).
  • the network device may also be a station, an access point (AP), a relay station, an in-vehicle device, a wearable device, or the like.
  • FIG. 1 shows a bandwidth switching method according to an embodiment of the present application, where the method includes:
  • Step 101 The network device sends downlink control information (DCI) to the terminal device, where the DCI is sent by using a physical downlink control channel (PDCCH), where the DCI includes first indication information and second indication information.
  • DCI downlink control information
  • the first indication information is used to indicate that the terminal device transmits the target data
  • the second indication information is used to instruct the terminal device to switch the activated BWP to the target BWP.
  • the first indication information may be used to indicate that the terminal device transmits the target data in the first direction, where the first direction may be an uplink direction, a downlink direction, or a side link direction, and the so-called edge link direction refers to a UE to UE communication. direction.
  • the first indication information is used to indicate that the terminal device receives the target data that is sent by the network device through the physical downlink channel, and the physical downlink channel may be a PDCCH, a physical downlink shared channel (PDSCH), Physical control format indicator channel (PCFICH), physical hybrid automatic repeat request indicator channel (PHICH), physical multicast channel (PMCH), and physical broadcast channel (physical broadcast channel, PBCH) and the like.
  • the physical downlink channel is used as the PDSCH as an example for description.
  • the first indication information is PDSCH scheduling information, including timing parameters K0, where K0 indicates that the terminal device receives the DCI and the first time that the terminal device receives the target data on the PDSCH. The time interval at which the terminal device can determine the first time to receive the target data according to the K0.
  • the first indication information is used to indicate that the terminal device sends the target data to the network device by using the physical uplink channel
  • the physical uplink channel may be a physical uplink control channel (PUCCH) and a physical uplink sharing.
  • the following describes the physical uplink channel as the PUSCH in the following examples.
  • the first indication information is PUSCH scheduling information, and includes a timing parameter K2, where K2 indicates that the terminal device receives the DCI and the first time that the terminal device sends the target data on the PUSCH. The time interval at which the terminal device can determine the first time to transmit the target data according to the K2.
  • the first indication information is used to indicate that the terminal device sends the target data to the other terminal device through the physical edge channel
  • the physical edge link channel may be a physical sidechain control channel (physical sidelink control). Channel, PSCCH), physical side link shared channel (PSSCH), physical side link discovery channel (PSDCH), and the like.
  • the first indication information may not include the above-mentioned timing parameter K0 or K2, or the value of the above-mentioned timing parameter K0 or K2 is default, and the terminal device may use the preset duration as the time for receiving the DCI and the terminal device in the first direction. The time interval between the first time when the target data is transmitted, the terminal device may determine the first time to send the target data according to the preset duration.
  • the first indication information may further include other information, such as resource allocation (RA) information, a modulation and coding mode, a carrier indication field, and the like.
  • RA resource allocation
  • the second indication information may indicate that the terminal device switches the activated downlink BWP to the target downlink BWP, and may also instruct the terminal device to switch the activated uplink BWP to the target uplink BWP, and may also instruct the terminal device to switch the activated BWP in the side link direction.
  • the so-called switching of the activated BWP to the target BWP refers to deactivating the original activated BWP and activating the target BWP. There may be an overlapping area between the original activated BWP and the target BWP, or there may be no overlapping area. Alternatively, one of the original activated BWP and the target BWP may cover the other.
  • the second indication information includes at least one index information of the target BWP.
  • the number of the target BWPs in the embodiment of the present application may be one or multiple, which is not limited in the embodiment of the present application.
  • the direction in which the multiple target BWPs are located may be different.
  • the second indication information may indicate that the terminal device switches the activated downlink BWP to the target downlink BWP, and indicates that the terminal device will activate the uplink BWP. Switch to the target upstream BWP.
  • the transmission direction of the target data indicated by the first indication information may be the same as the uplink and downlink direction of the target BWP indicated by the second indication information, for example, the first indication information is used to indicate that the terminal device receives the PDSCH data, and the second indication The information is used to instruct the terminal device to switch the activated downlink BWP to the target downlink BWP.
  • the direction of the target data indicated by the first indication information may be different from the uplink and downlink direction of the target BWP indicated by the second indication information.
  • the first indication information is used to indicate that the terminal device sends the PUSCH data
  • the second indication information is used. Instructing the terminal device to switch the activated downlink BWP to the target downlink BWP.
  • the first indication information is used to indicate that the terminal device sends the edge link data
  • the second indication information is used to instruct the terminal device to switch the activated uplink BWP to the target. Upstream BWP.
  • the DCI may include other information in addition to the first indication information and the second indication information.
  • the DCI may also be a redundant bit, a cyclic redundancy check (CRC), or the like.
  • Step 102 The terminal device receives the DCI sent by the network device.
  • Step 103 The terminal device switches the activated BWP to the target BWP according to the second indication information.
  • the network device may send the DCI to the terminal device, and schedule the terminal device to perform data transmission, and instruct the terminal device to switch the activated BWP.
  • the data scheduling and the BWP switching indication are simultaneously implemented through one DCI, and the efficiency is high.
  • the method further includes the step 104: the terminal device transmits the target data to the network device according to the first indication information.
  • the following describes the bandwidth switching method when the transmission direction of the target data indicated by the first indication information is the same as the uplink and downlink direction in which the target BWP indicated by the second indication information is located.
  • the first direction is the uplink direction or the downlink direction. It should be understood that the bandwidth switching method described below may also be applied to the case where the first direction is the side link direction.
  • FIG. 2 shows another bandwidth switching method according to an embodiment of the present application, including:
  • Step 201 The network device sends a DCI to the terminal device, where the DCI includes first indication information and second indication information, where the first indication information is used to indicate that the terminal device transmits the target data in the first direction at the first time, and the second indication information And configured to instruct the terminal device to switch the BWP activated in the first direction to the target BWP, where the first direction is an uplink direction or a downlink direction.
  • the DCI includes first indication information and second indication information, where the first indication information is used to indicate that the terminal device transmits the target data in the first direction at the first time, and the second indication information And configured to instruct the terminal device to switch the BWP activated in the first direction to the target BWP, where the first direction is an uplink direction or a downlink direction.
  • Step 202 The terminal device receives the DCI sent by the network device.
  • Step 203 The terminal device transmits the target data in the first direction at the first time according to the first indication information.
  • Step 204 The terminal device switches the BWP activated in the first direction to the target BWP at the second time according to the second indication information.
  • the network device can simultaneously implement data scheduling and BWP switching indication in the same direction through one DCI, and the efficiency is high.
  • the second time in step 204 is later than the first time in step 203, and the implementation manner may be multiple, including:
  • the terminal device takes the time after the preset time of the first time as the second time. For example, the terminal device determines that the second time is the first radio frame/first subframe/first slot/first minislot/first symbol after the first time.
  • the difference between the so-called slot and the mini slot is that the mini-slot contains fewer symbols than the slot, for example, the slot contains 14 symbols, and the mini-slot contains 7 symbols. .
  • the terminal device switches the activated BWP to the target BWP at the second time, which may be referred to in the first radio frame/first subframe/first time slot/first minislot/first
  • the start time of a symbol switches the activated BWP to the target BWP, and may also refer to the first radio frame/first subframe/first slot/first minislot/first symbol
  • the activated BWP is switched to the target BWP at any one of the corresponding time periods.
  • the network device determines a time after the first time as the second time, and adds a timing parameter Ks to the second indication information, where Ks indicates the second time. For example, the network device determines that the second time is the first radio frame/first subframe/first slot/first minislot/first symbol after the first time.
  • the second indication information may not include the foregoing timing parameter Ks, or the value of the timing parameter Ks is defaulted, and the terminal device may switch the BWP that is activated in the first direction by using the set duration as the time for receiving the DCI and the terminal device to activate the first direction. For the time interval between the second time of the target BWP, the terminal device may determine the second time according to the set duration.
  • FIG. 3 shows a possible situation in which the first indication information in the DCI indicates that the terminal device receives the target data at the first time, and the second indication information indicates that the terminal device switches the activated BWP.
  • the downlink BWP activated by the terminal device is BWP1
  • the terminal device receives the DCI at BWP1
  • determines the first time according to the timing parameter K0 in the first indication information in the DCI receives the target data at the first time, and then receives the target data at the first time
  • the active BWP is switched from BWP1 to BWP2 at the start time (ie, the second time) of the first time slot (ie, time slot 2) after the first time.
  • the terminal device can receive downlink data (PDSCH data) on the BWP 2.
  • PDSCH data downlink data
  • the terminal device transmits the target data on the original activated BWP first (at the first time), and then switches the activated BWP (at the second time) to avoid the prior activation.
  • the target BWP is transmitted on the target BWP
  • the original BWP and the target BWP have different bandwidths, which may cause the RA to fail to adapt to the target BWP in the first indication information, thereby preventing the target data from being transmitted normally, and avoiding the original activation.
  • the difference between the BWP and the sub-carrier spacing of the target BWP causes the length of the time slot length of the original activated BWP and the target BWP to be different, thereby causing the time domain resource indication and the timing indication in the DCI to be in error.
  • FIG. 4 shows another bandwidth switching method of the embodiment of the present application, including:
  • Step 301 The network device sends a DCI to the terminal device, where the DCI includes first indication information and second indication information, where the first indication information is used to indicate that the terminal device receives the target data at the first time, and the second indication information is used to indicate the terminal device.
  • the activated downlink BWP is switched to the target downlink BWP.
  • Step 302 The terminal device receives the DCI sent by the network device.
  • Step 303 The terminal device receives the target data at the first time. If the reception is successful, the process proceeds to step 304. If the reception fails, the process proceeds to step 305.
  • Step 304 The terminal device sends an acknowledgement (ACK) message to the network device, where the ACK message indicates that the target data is successfully received. Go to step 306.
  • ACK acknowledgement
  • Step 305 The terminal device sends a negative ACK (NACK) message to the network device, where the NACK message indicates that the target data reception fails. Go to step 306.
  • NACK negative ACK
  • Step 306 The terminal device switches the activated downlink BWP to the target downlink BWP.
  • step 301 to step 306 is also applicable to the case where the first indication information indicates that the terminal device sends the target data at the first time, and the second indication information indicates that the terminal device switches the activated uplink BWP to the target uplink BWP.
  • the terminal device after the terminal device sends the target data to the network device at the first time, the ACK message or the NACK message returned by the network device is waited for, and after receiving the ACK message or the NACK message, the terminal device responds to the second indication information and activates.
  • the upstream BWP is switched to the target upstream BWP.
  • the terminal device transmits the target data on the original activated BWP at the first time, and the terminal device already knows whether the target data is successfully transmitted, and performs the switching of the activated BWP after confirming whether the target data is successfully transmitted, and can appropriately Considering the correctness of the transmission of the target data and the timeliness of the switching of the BWP, the efficiency of the communication system is improved.
  • step 306 the terminal device switches the activated downlink BWP to the target downlink BWP at the second time, where the second time is the first radio frame/first after the time when the terminal device sends the ACK message in step 304.
  • Subframe/first time slot/first minislot/first symbol, or the second time is the first radio frame/first after the time when the terminal device sends a NACK message in step 305
  • Subframe/first time slot/first minislot/first symbol is the first radio frame/first after the time when the terminal device sends a NACK message.
  • FIG. 5 shows a possible scenario in which the first indication information in the DCI indicates that the terminal device receives the target data at the first time, and the second indication information indicates that the terminal device switches the activated BWP.
  • the downlink BWP activated by the terminal device is BWP1
  • the terminal device receives the DCI at BWP1
  • determines the first time according to the timing parameter K0 in the first indication information in the DCI receives the target data at the first time, and then receives the target data at the first time, and then
  • the terminal device sends an ACK message or a NACK message to the network device, and activates the BWP at the start time (ie, the second time) of the first time slot (ie, time slot 2) after any one of the ACK message or the NACK message is sent. Switch from BWP1 to BWP2. Then, the terminal device can receive downlink data (PDSCH data) on the BWP 2.
  • PDSCH data downlink data
  • the terminal device indicates that the terminal device sends the target data at the first time
  • the second indication information indicates that the terminal device switches the activated uplink BWP to the target uplink BWP, and the terminal device switches the activated uplink BWP to the target at the second time.
  • Uplink BWP the second time is the first radio frame/first subframe/first time slot/first minislot/first symbol after the moment when the terminal device receives the ACK message, or
  • the second time is the first radio frame/first sub-frame/first time slot/first mini-slot/first symbol after the time when the terminal device receives the NACK message.
  • the terminal device can perform the switching of the active BWP immediately after confirming whether the target data is successfully transmitted, and ensure the timeliness of the switching of the BWP as much as possible.
  • step 306 after the foregoing step 305, instead of going to step 306, after waiting for the network device to receive the NACK message, the target data is retransmitted to the terminal device based on the retransmission mechanism, and the terminal device receives the retransmitted target data. If yes, go to step 306. If it fails, send a NACK message to the network device to start retransmission until the target data is successfully received, and then step 306 is performed.
  • the terminal device may go to step 306 regardless of whether the ACK message or the NACK message is sent to the network device.
  • the first indication information indicates that the terminal device sends the target data at the first time
  • the second indication information indicates that the terminal device switches the activated uplink BWP to the target uplink BWP, after the terminal device sends the target data to the network device at the first time, Waiting for the ACK message or the NACK message returned by the network device, if receiving the NACK message, retransmitting the target data to the network device until the receiving network device returns an ACK message, responding to the second indication information, and switching the activated uplink BWP to the target uplink. BWP.
  • the terminal device may switch the activated uplink BWP to the target in response to the second indication information after receiving the retransmitted target data for the ith time (eg, i is equal to 1), whether receiving the ACK message or the NACK message.
  • Upstream BWP may switch the activated uplink BWP to the target in response to the second indication information after receiving the retransmitted target data for the ith time (eg, i is equal to 1), whether receiving the ACK message or the NACK message.
  • Upstream BWP may switch the activated uplink BWP to the target in response to the second indication information after receiving the retransmitted target data for the ith time (eg, i is equal to 1), whether receiving the ACK message or the NACK message.
  • the time when the terminal device switches the activated downlink BWP to the target downlink BWP may be: the first radio frame/first subframe/first after the moment when the terminal device sends the ACK message.
  • the time at which the terminal device switches the activated uplink BWP to the target uplink BWP may be: the first radio frame/first subframe/first time slot/first minislot after the time when the terminal device receives the ACK message / first symbol.
  • the terminal device confirms that the target data is transmitted and switches the activated BWP, so that the terminal has switched to the target BWP when the target data is retransmitted after the target data transmission fails, and the original data is activated when the target data is retransmitted on the target BWP.
  • the difference between the BWP and the target BWP's bandwidth or subcarrier spacing results in failure of the target data retransmission.
  • the terminal device can switch the activated BWP in time after confirming that the target data transmission is successful, and reduce the time required to activate the BWP.
  • FIG. 7 shows another bandwidth switching method of the embodiment of the present application, including:
  • Step 401 The network device sends a DCI to the terminal device, where the DCI includes first indication information and second indication information, where the first indication information is used to indicate that the terminal device transmits the target data in the first direction at the first time, and the second indication information And configured to instruct the terminal device to switch the BWP activated in the first direction to the target BWP at the second time, where the first direction is an uplink direction or a downlink direction.
  • the DCI includes first indication information and second indication information, where the first indication information is used to indicate that the terminal device transmits the target data in the first direction at the first time, and the second indication information And configured to instruct the terminal device to switch the BWP activated in the first direction to the target BWP at the second time, where the first direction is an uplink direction or a downlink direction.
  • the first indication information may be PDSCH scheduling information, including timing parameters K0, where K0 indicates a time interval between the time when the terminal device receives the DCI and the first time that the terminal device receives the target data on the PDSCH.
  • the terminal device can determine the first time to receive the target data according to the K0.
  • the second indication information is used to indicate that the terminal device switches the activated downlink BWP to the target downlink BWP, including the timing parameter Ks1, and the time interval between the time when the terminal device receives the DCI and the second time when the terminal device switches to the target downlink BWP.
  • the terminal device can determine the second time to switch to the target downlink BWP according to the Ks1.
  • the first indication information may be PUSCH scheduling information, including timing parameters K2, where K2 indicates a time interval between the time when the terminal device receives the DCI and the first time when the terminal device sends the target data on the PUSCH.
  • the terminal device can determine the first time to transmit the target data according to the K2.
  • the second indication information is used to indicate that the terminal device switches the activated uplink BWP to the target uplink BWP, including the timing parameter Ks2, and the time interval between the time when the terminal device receives the DCI and the second time when the terminal device switches to the target uplink BWP.
  • the terminal device can determine the second time to switch to the target uplink BWP according to the Ks2.
  • the first indication information may not include the above-mentioned timing parameter K0 or K2, or the value of the above-mentioned timing parameter K0 or K2 is default, and the terminal device may use the preset duration as the time for receiving the DCI and the terminal device in the first direction. The time interval between the first time when the target data is transmitted, the terminal device may determine the first time to send the target data according to the preset duration.
  • Step 402 The terminal device receives the DCI sent by the network device. When the second time is later than the first time, the process proceeds to step 403.
  • Step 403 The terminal device transmits the target data in the first direction by using the BWP activated before the second time at the first time. Go to step 404.
  • Step 404 The terminal device switches the BWP activated in the first direction to the target BWP at the second time.
  • FIG. 8 shows a possible situation in which the first indication information in the DCI indicates that the terminal device receives the target data at the first time, and the second indication information indicates that the terminal device switches the activated BWP.
  • the downlink BWP activated by the terminal device is BWP1
  • the terminal device receives the DCI at BWP1
  • determines the first time according to the timing parameter K0 in the first indication information in the DCI receives the target data at the first time, and then receives the target data at the first time
  • the second time is determined according to the timing parameter Ks1 in the first indication information in the DCI, and the activated BWP is switched from BWP1 to BWP2 at the second time.
  • the terminal device can receive downlink data (PDSCH data) on the BWP 2.
  • PDSCH data downlink data
  • the network device may send the DCI to the terminal device, where the DCI includes the first indication information indicating the terminal device to transmit the target data, and the second indication information indicating the BWP of the terminal device to switch the activation, the first indication information includes a timing parameter indicating a (first) time of the transmission target data, the second indication information includes a timing parameter indicating a (second) time of the switching activated BWP, and the terminal device may transmit the target data at the first moment according to the indication of the DCI and The activated BWP is switched at the second moment, and the data scheduling and the BWP switching indication are efficiently implemented by one DCI.
  • the network device may also set the second time of the switching BWP to be later than the first time of the transmission target data, thereby avoiding that the RA of the first indication information cannot be adapted to the target BWP due to the difference between the bandwidth of the original activated BWP and the target BWP, thereby causing the RA to fail to adapt to the target BWP.
  • the length of the slot length in the original activated BWP and the target BWP may be different due to the difference between the original activated BWP and the target BWP subcarrier spacing, thereby causing the time domain resource indication and timing indication in the DCI. All are wrong.
  • step 402 if the first time is later than the second time, then step 404 is performed. After the end of the execution of step 404, the process proceeds to step 405.
  • Step 405 The terminal device transmits the target data in the first direction by using the activated target BWP at the first time.
  • the network device may set the first time later than the second time, so that the terminal device can switch the activated BWP in time, and the terminal device can transmit the target data on the target BWP after the handover, taking into account the transmission of the target data and Timeliness of BWP switching.
  • the terminal device parses the field in the DCI according to the bandwidth and/or the subcarrier spacing of the target BWP. For example, for the RA field in the DCI, if the target bandwidth is twice the original bandwidth, the resource granularity indicated by the RA field is adjusted to be twice the granularity of the original bandwidth resource.
  • the process proceeds to step 404.
  • the terminal device may send a rescheduling request to the network device, requesting the network device to reschedule the target data based on the activated target BWP.
  • the terminal device can monitor the PDCCH on the target downlink BWP to ensure that the terminal device can receive the target downlink BWP after the handover.
  • the DCI sent by the network device or, after the terminal device switches the activated uplink BWP to the target uplink BWP according to the second indication information, when the uplink data scheduling or the need to feed back the uplink control information, the terminal device sends the corresponding information to the network device by using the target uplink BWP to ensure the terminal.
  • the device can send information to the network device in time.
  • the terminal device may send a response message indicating that the BWP handover succeeds to the network device, so that the network device can pass the target BWP and the terminal.
  • the device communicates or schedules the terminal device.
  • FIG. 10 shows a bandwidth switching device 50 according to an embodiment of the present application.
  • the device 50 can be used to implement the functions of the terminal device in any corresponding bandwidth switching method in FIG. 1 to FIG.
  • the device 50 includes a transceiver module 51 and a response module 52.
  • the transceiver module 51 is configured to receive downlink control information DCI sent by the network device, where the DCI includes first indication information and second indication information, where the first indication information is used to instruct the device to transmit target data, and the second indication The information is used to instruct the device to switch the activated bandwidth portion BWP to the target BWP.
  • the response module 52 is configured to switch the activated BWP to the target BWP according to the second indication information.
  • the first indication information is specifically used to indicate that the apparatus transmits target data in a first direction at a first time
  • the second indication information is specifically used to indicate that the apparatus is to The BWP activated in the first direction is switched to the target BWP
  • the first direction is an uplink direction, a downlink direction, or an edge link direction.
  • the transceiver module 51 is further configured to: transmit, according to the first indication information, the target data in the first direction at a first time; the response module 52, specifically And switching, according to the second indication information, the BWP activated in the first direction to the target BWP at a second time.
  • the second time is the first radio frame/first subframe/first slot/first minislot/first symbol after the first time .
  • the transceiver module 51 is further configured to: after transmitting the target data in the first direction at a first time, to the network when the first direction is a downlink direction
  • the device sends an acknowledgement ACK message or a negative acknowledgement NACK message; when the first direction is an uplink direction, receiving an ACK message or a NACK message sent by the network device; wherein the ACK message indicates that the target data is successfully received, and the NACK message indicates the target data. Receive failed.
  • the second time is a first radio frame/first subframe/first time after the transceiver module sends an ACK message. a first minislot/first symbol; and/or, when the first direction is an uplink direction, the second time is a first radio frame after the transceiver module receives an ACK message/ First subframe / first time slot / first mini time slot / first symbol.
  • the second time is a first radio frame/first sub-address after the transceiver module sends any one of an ACK message or a NACK message. a frame/first time slot/first minislot/first symbol; and/or, when the first direction is an uplink direction, the second time is that the transceiver module receives an ACK message or a NACK The first radio frame/first subframe/first slot/first minislot/first symbol after any one of the messages.
  • the second indication information includes a timing parameter, where the timing parameter is used to indicate a second time; the response module 52 is specifically configured to: activate the first direction at a second time The BWP is switched to the target BWP.
  • the response module 52 is further configured to: after the transceiver module receives the DCI, if the second time is later than the first time, then at the first time, The target data is transmitted in the first direction by the BWP activated before the second time.
  • the response module 52 is specifically configured to: after the transceiver module receives the DCI, if the first time is later than the second time, then at the first time, Transmitting the target data in the first direction by the target BWP that has been activated.
  • the response module is specifically configured to: after the transceiver module receives the DCI, if the first time is later than the second time, suspending responding to the first indication information .
  • each functional module in each embodiment of the present invention may be integrated into one processing. In the device, it can also be physically existed alone, or two or more modules can be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the device 50 can include the processor 61.
  • the hardware of the entity corresponding to the response module 52 may be the processor 61.
  • the processor 61 may be one or more central processing units (CPUs), or a digital processing module or the like.
  • the device 50 may further include a transceiver 62.
  • the processor 62 receives the data sent by the network device and the control information through the transceiver 62.
  • the hardware of the entity corresponding to the transceiver module 51 may be the transceiver 62.
  • the apparatus 50 also includes a memory 63 for storing programs executed by the processor 61.
  • the memory 63 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory such as a random access memory (random). -access memory, RAM).
  • Memory 63 is any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and that can be accessed by a computer, but is not limited thereto.
  • FIG. 12 shows a bandwidth switching device 70 according to an embodiment of the present application.
  • the device 70 can be used to implement the functions of the network device in any of the corresponding bandwidth switching methods of FIG. 1 to FIG.
  • the device 70 includes: a sending module 71, configured to send a DCI to the terminal device, where the DCI includes first indication information and second indication information, where the first indication information is used to instruct the terminal device to transmit target data, The second indication information is used to instruct the terminal device to switch the activated bandwidth portion BWP to the target BWP.
  • the device 70 also includes a processing module 72 for generating the DCI.
  • the device 70 further includes a receiving module 73, configured to receive data sent by the terminal device and request information.
  • the first indication information is specifically used to indicate that the terminal device transmits target data in a first direction at a first time
  • the second indication information is specifically used to indicate that the terminal device
  • the BWP activated in the first direction is switched to the target BWP, and the first direction is an uplink direction, a downlink direction, or an edge link direction.
  • the second indication information includes a timing parameter, where the timing parameter is used to indicate a second time, where the second indication information is specifically used to indicate that the terminal device is to be in the second time
  • the BWP activated in the first direction is switched to the target BWP.
  • each functional module in each embodiment of the present invention may be integrated into one processing. In the device, it can also be physically existed alone, or two or more modules can be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the integrated module can be implemented in the form of hardware, and can continue to refer to FIG. 11, and the device 70 can include a processor.
  • the hardware of the entity corresponding to the processing module 72 may be a processor.
  • the processor can be one or more CPUs, or a digital processing module or the like.
  • the device 70 may further include a transceiver, and the processor receives the data sent by the terminal device and the request information through the transceiver.
  • the hardware of the entity corresponding to the sending module 71 and the receiving module 73 may be a transceiver.
  • the apparatus 70 also includes a memory for storing a program executed by the processor.
  • the memory may be a non-volatile memory such as a hard disk or a solid state hard disk or the like, or may be a volatile memory such as a random access memory.
  • a memory is any other medium that can be used to carry or store desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto.
  • the embodiment of the present application further provides a computer readable storage medium, where the readable storage medium stores computer instructions, when the instructions are executed on a computer, causing the computer to perform any corresponding bandwidth switching method of FIG. 1 to FIG. The steps performed by the terminal device.
  • the embodiment of the present application further provides a computer readable storage medium, where the readable storage medium stores computer instructions, when the instructions are executed on a computer, causing the computer to perform any corresponding bandwidth switching method of FIG. 1 to FIG. The steps performed by the network device.
  • the embodiment of the present application further provides a computer program product, when the computer program product is run on a computer, causing the computer to perform the steps performed by the terminal device in any corresponding bandwidth switching method of FIG. 1 to FIG.
  • the embodiment of the present application further provides a computer program product, when the computer program product is run on a computer, causing the computer to perform the steps performed by the network device in any corresponding bandwidth switching method of FIG. 1 to FIG.
  • the embodiment of the present application further provides a chip, where the chip is connected to a memory, and is used for reading and executing a software program stored in the memory, to execute a terminal device in any corresponding bandwidth switching method of FIG. 1 to FIG. The steps performed.
  • the embodiment of the present application further provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory to perform a network switching device in any corresponding bandwidth switching method of FIG. 1 to FIG. The steps performed.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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Abstract

一种带宽切换方法及装置，用以解决现有技术中缺乏高效地切换激活的BWP的方案的问题。该带宽切换方法包括：终端设备接收网络设备发送的下行控制信息DCI，该DCI包括第一指示信息以及第二指示信息，该第一指示信息用于指示该终端设备传输目标数据，该第二指示信息用于指示该终端设备将激活的带宽部分BWP切换为目标BWP；该终端设备根据该第二指示信息，将激活的BWP切换为该目标BWP。

Description

一种带宽切换方法及装置
本申请要求于2017年11月10日提交中国专利局、申请号为201711106457.0、申请名称为“一种带宽切换方法及装置”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
本申请涉及信息技术领域，尤其涉及一种带宽切换方法及装置。
背景技术
在5G新无线接入技术(5th Generation New Radio Access Technology，5G NR)中，单载波带宽可以达到400MHz，为了充分利用带宽资源，可以将单载波带宽划分为若干个带宽部分(bandwidth part，BWP)，网络设备可以给终端设备配置多个带宽部分，并指示终端设备激活其中的一个BWP。
但是，现有技术缺乏高效地切换激活的BWP的方案。
发明内容
本申请提供一种带宽切换方法及装置，用以解决现有技术中缺乏高效地切换激活的BWP的方案的问题。
第一方面，本申请提供一种带宽切换方法，应用于带宽可划分为带宽部分BWP的通信系统，该方法包括：终端设备接收网络设备发送的下行控制信息DCI，该DCI可以通过物理下行控制信道(physical downlink control channel，PDCCH)发送，DCI包括第一指示信息以及第二指示信息，所述第一指示信息用于指示所述终端设备传输目标数据，例如，指示终端设备接收网络设备通过物理下行信道发送的目标数据，或者，指示终端设备通过物理上行信道向网络设备发送目标数据，或者，指示终端设备通过物理边链信道向其他终端设备发送目标数据；所述第二指示信息用于指示所述终端设备将激活的带宽部分BWP切换为目标BWP，例如，指示终端设备将激活的下行BWP切换为目标下行BWP，或者，指示终端设备将激活的上行BWP切换为目标上行BWP，或者，指示将激活的边链路方向的BWP切换为目标BWP。所述终端设备根据所述第二指示信息，将激活的BWP切换为所述目标BWP。上述技术方案中，网络设备可以向终端设备发送DCI，既调度终端设备进行数据传输，又指示终端设备切换激活的BWP，由于通过一个DCI同时实现数据调度以及BWP切换指示，效率较高。
在第一方面的一些实现方式中，所述第一指示信息具体用于指示所述终端设备在第一方向上传输目标数据，所述第二指示信息具体用于指示所述终端设备将所述第一方向上激活的BWP切换为目标BWP，所述第一方向为上行方向、下行方向或边链路方向。由于可以通过一个DCI同时实现同一方向的数据调度以及BWP切换指示，效率较高。
在第一方面的一些实现方式中，在所述终端设备接收所述DCI之后，所述终端设备根据所述第一指示信息，在所述第一指示信息指示的第一时间、在所述第一方向上传输所述目标数据。该第一时间可以由第一指示信息中的时序参数指示，或者，第一指示信息也可以不包括该时序参数，或者该时序参数的值缺省，终端设备可以以预设 时长作为接收DCI的时间与终端设备在第一方向上传输目标数据的第一时间之间的时间间隔。
在第一方面的一些实现方式中，所述终端设备根据所述第二指示信息，在第二时间将所述第一方向上激活的BWP切换为所述目标BWP。该第二时间可以由第二指示信息中的时序参数指示，或者，第二指示信息也可以不包括该时序参数，或者该时序参数的值缺省，终端设备可以以预设时长作为接收DCI的时间与将激活的BWP切换为目标BWP的第二时间之间的时间间隔。或者，第二指示信息不包括该时序参数，终端设备根据与网络设备之间的预定确定该第二时间，或，终端设备根据与网络设备共同遵守的协议规定确定该第二时间。
在第一方面的一些实现方式中，所述第二时间为所述第一时间后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。上述技术方案中终端设备先(在第一时间)在原激活的BWP上传输目标数据，后(在第二时间)切换激活的BWP，可以避免在先激活目标BWP，后在目标BWP上传输目标数据时，因原激活的BWP与目标BWP的带宽不同导致第一指示信息中RA无法适应目标BWP，进而致使目标数据无法正常传输的情形，还可以避免因原激活的BWP与目标BWP的子载波间隔不同导致原激活的BWP与目标BWP中时隙长度的长度不同，进而致使DCI中时域资源指示与时序指示均出错的情形。不仅如此，终端设备能够在进行目标数据的传输后及时切换激活的BWP，减少BWP切换耗时。
在第一方面的一些实现方式中，在所述第一方向为下行方向时，所述终端设备在第一时间接收目标数据之后，向所述网络设备发送确认ACK消息或否定确认NACK消息，以便让网络设备获知数据传输是否成功，便于网络设备对终端设备进行调度。
在第一方面的一些实现方式中，在所述第一方向为上行方向时，所述终端设备在第一时间在所述第一方向发送所述目标数据之后，接收所述网络设备发送的ACK消息或NACK消息，以便获知目标数据是否传输成功。
在第一方面的一些实现方式中，在所述第一方向为下行方向时，所述第二时间为所述终端设备发送ACK消息之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。上述技术方案中，终端设备能够在确认目标数据是否接收成功后立即进行激活BWP的切换，尽可能保证BWP的切换的及时性。
在第一方面的一些实现方式中，在所述第一方向为上行方向时，所述第二时间为所述终端设备接收ACK消息之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。上述技术方案中，终端设备能够在确认目标数据是否发送成功后立即进行激活BWP的切换，尽可能保证BWP的切换的及时性。
在第一方面的一些实现方式中，在所述第一方向为下行方向时，所述第二时间为所述终端设备发送ACK消息或NACK消息中任一之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。上述技术方案中，终端设备在确认目标数据传输成才切换激活的BWP，避免在目标数据传输失败后的目标数据重传时，终端已切换至目标BWP，在目标BWP上重传目标数据时因原激活的BWP与目标BWP的带宽或子载波间隔不同导致目标数据重传失败的情形。不仅如此，终端设备可以在确认目标数据传输成功后及时切换激活的BWP，减少激活BWP的耗时。
在第一方面的一些实现方式中，在所述第一方向为上行方向时，所述第二时间为 所述终端设备接收ACK消息或NACK消息中任一之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。上述技术方案中，终端设备在确认目标数据传输成才切换激活的BWP，避免在目标数据传输失败后的目标数据重传时，终端已切换至目标BWP，在目标BWP上重传目标数据时因原激活的BWP与目标BWP的带宽或子载波间隔不同导致目标数据重传失败的情形。不仅如此，终端设备可以在确认目标数据传输成功后及时切换激活的BWP，减少激活BWP的耗时。
在第一方面的一些实现方式中，所述第一指示信息具体用于指示所述终端设备在第一时间、在第一方向上传输目标数据；所述第二指示信息包括时序参数，所述时序参数用于指示第二时间；所述终端设备根据所述第二指示信息，将激活的BWP切换为所述目标BWP，包括：所述终端设备在第二时间将所述第一方向上激活的BWP切换为所述目标BWP。上述技术方案，通过在第二指示信息中添加指示切换BWP时间的时序参数，便于终端设备确定切换BWP时间，且实现方式简单。
在第一方面的一些实现方式中，在所述终端设备接收所述DCI之后，若所述第二时间晚于所述第一时间，则所述终端设备在所述第一时间、通过所述第二时间之前激活的BWP、在所述第一方向上传输所述目标数据。上述技术方案中，网络设备可以将切换BWP的第二时间设置地晚于传输目标数据的第一时间，进而可以避免因原激活的BWP与目标BWP的带宽不同导致第一指示信息中RA无法适应目标BWP，进而致使目标数据无法正常传输的情形，还可以避免因原激活的BWP与目标BWP的子载波间隔不同导致原激活的BWP与目标BWP中时隙长度的长度不同，进而致使DCI中时域资源指示与时序指示均出错的情形。
在第一方面的一些实现方式中，在所述终端设备接收所述DCI之后，若所述第一时间晚于所述第二时间，则所述终端设备在所述第一时间、通过已激活的所述目标BWP、在所述第一方向上传输所述目标数据。上述技术方案中，网络设备可以将第一时间设置地晚于第二时间，以便终端设备能够及时切换激活的BWP，终端设备能够在切换后的目标BWP上传输目标数据，兼顾目标数据的传输以及BWP切换的及时性。
在第一方面的一些实现方式中，在所述终端设备接收所述DCI之后，若所述第一时间晚于所述第二时间，则所述终端设备中止响应所述第一指示信息，以避免目标数据传输失败。
第二方面，本申请提供一种带宽切换方法，包括：网络设备向终端设备发送DCI，所述DCI包括第一指示信息以及第二指示信息，所述第一指示信息用于指示所述终端设备传输目标数据，所述第二指示信息用于指示所述终端设备将激活的带宽部分BWP切换为目标BWP。
在第二方面的一些实现方式中，所述第一指示信息具体用于指示所述终端设备在第一方向上传输目标数据，所述第二指示信息具体用于指示所述终端设备将所述第一方向上激活的BWP切换为目标BWP，所述第一方向为上行方向、下行方向或边链路方向。
在第二方面的一些实现方式中，所述第二指示信息包括时序参数，所述时序参数用于指示第二时间，所述第二指示信息具体用于指示所述终端设备在所述第二时间将所述第一方向上激活的BWP切换为目标BWP。
在第二方面的一些实现方式中，网络设备还接收终端设备发送的表示BWP切换 成功的响应消息，以便网络设备可以通过该目标BWP与终端设备通信或对终端设备进行调度。
第三方面，本申请提供一种切换带宽的装置，该装置用于执行上述第一方面或第一方面的任意可能的实现中的方法。具体的，该装置包括用于执行上述第一方面或第一方面的任意可能的实现中的方法的模块。
第四方面，本申请提供一种切换带宽的装置，该装置用于执行上述第二方面或第二方面的任意可能的实现中的方法。具体的，该装置包括用于执行上述第二方面或第二方面的任意可能的实现中的方法的模块。
第五方面，本申请提供一种终端设备，该终端设备用于执行上述第一方面或第一方面的任意可能的实现中的方法。具体的，该终端设备包括处理器、存储器以及收发器。存储器用于存储计算机指令；收发器用于与网络设备或其他终端设备通信；处理器与所述存储器以及所述收发器通信连接，用于执行所述计算机指令，以执行上述第一方面或第一方面的任意可能的实现中的方法。
第六方面，本申请提供一种网络设备，该网络设备用于执行上述第二方面或第二方面的任意可能的实现中的方法。具体的，该网络设备包括处理器、存储器以及收发器。存储器用于存储计算机指令；收发器用于与终端设备或其他网络设备通信；处理器与所述存储器以及所述收发器通信连接，用于执行所述计算机指令，以执行上述第二方面或第二方面的任意可能的实现中的方法。
第七方面，本申请提供了一种计算机可读存储介质，该可读存储介质中存储有计算机指令，所述指令在计算机上运行时，使得计算机执行第一方面或第一方面的任意可能的实现中的方法。
第八方面，本申请提供了一种计算机可读存储介质，该可读存储介质中存储有计算机指令，所述指令在计算机上运行时，使得计算机执行第二方面或第二方面的任意可能的实现中的方法。
第九方面，本申请提供了一种计算机程序产品，所述计算机程序产品在计算机上运行时，使得计算机执行第一方面或第一方面的任意可能的实现中的方法。
第十方面，本申请提供了一种计算机程序产品，所述计算机程序产品在计算机上运行时，使得计算机执行第二方面或第二方面的任意可能的实现中的方法。
第十一方面，本申请提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以执行第一方面或第一方面的任意可能的实现中的方法。
第十二方面，本申请提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以执行第二方面或第二方面的任意可能的实现中的方法。
本申请在上述各方面提供的实现的基础上，还可以进行进一步组合以提供更多实现。
附图说明
图1-图2、图4、图6-图7、图9为本申请实施例的至少一个实施例中切换带宽方法的流程示意图；
图3、图5、图8为本申请实施例的至少一个实施例中切换带宽的示意图；
图10-图12为本申请实施例的至少一个实施例中切换带宽的装置的示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
本申请提供一种带宽切换方法及装置，用以解决现有技术中缺乏高效地切换激活的BWP的方案的问题。其中，方法和装置是基于同一发明构思的，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
本申请中所涉及的多个，是指两个或两个以上。另外，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。再者，本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。还有，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，应理解，本申请实施例的技术方案可以应用于存在带宽部分BWP的各种通信系统，包括但不限于5G NR系统。
还应理解，在本申请实施例中终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，该终端设备可称为接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。例如，蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
还应理解，在本申请实施例中网络设备可以是用于与终端设备进行通信的设备，例如，可以是5G NR系统中的基站(gNode B，gNB)，也可以为长期演进(long term evolution，LTE)系统中的演进型基站(evolutional Node B，eNB或e-NodeB)，全球移动通信系统(global system for mobile communication，GSM)或码分多址(code division multiple access，CDMA)中的基站(base transceiver station，BTS)，也可以是宽带码分多址(wideband cdma，WCDMA)中的基站(NodeB)等。网络设备还可以是站点(station)、接入点(access point，AP)、中继站、车载设备、可穿戴设备等。
图1示出本申请实施例的一种带宽切换方法，该方法包括：
步骤101、网络设备向终端设备发送下行控制信息(downlink control information，DCI)，该DCI可以通过物理下行控制信道(physical downlink control channel，PDCCH)发送，该DCI包括第一指示信息以及第二指示信息，第一指示信息用于指示终端设备传输目标数据，第二指示信息用于指示终端设备将激活的BWP切换为目标BWP。
所述第一指示信息可以指示终端设备在第一方向上传输目标数据，该第一方向可以为上行方向、下行方向或者边链路(sidelink)方向，所谓边链路方向指UE到UE的通信方向。在第一方向为下行方向时，第一指示信息用于指示终端设备接收网络设备通过物理下行信道发送的目标数据，物理下行信道可以为PDCCH、物理下行共享信道(physical downlink shared channel，PDSCH)、物理控制格式指示信道(physical control  format indicator channel，PCFICH)、物理混合自动重传请求指示信道(physical hybrid automatic repeat request indicator channel，PHICH)、物理多播信道(physical multicast channel，PMCH)以及物理广播信道(physical broadcast channel，PBCH)等。为了便于描述，本申请实施例以下内容中以该物理下行信道为PDSCH为例进行说明。可选的，在该物理下行信道为PDSCH时，第一指示信息为PDSCH调度信息，包括时序参数K0，K0指示终端设备接收DCI的时间与终端设备在PDSCH上接收目标数据的第一时间之间的时间间隔，终端设备根据该K0可以确定接收目标数据的第一时间。
在第一方向为上行方向时，第一指示信息用于指示终端设备通过物理上行信道向网络设备发送目标数据，物理上行信道可以为物理上行控制信道(physical uplink control channel，PUCCH)、物理上行共享信道(physical uplink shared channel，PUSCH)、物理随机接入信道(physical random access channel，PRACH)等。为了便于描述，本申请实施例以下内容中以该物理上行信道为PUSCH为例进行说明。可选的，在该物理上行信道为PUSCH时，第一指示信息为PUSCH调度信息，包括时序参数K2，K2指示终端设备接收DCI的时间与终端设备在PUSCH上发送目标数据的第一时间之间的时间间隔，终端设备根据该K2可以确定发送目标数据的第一时间。
在第一方向为UE到UE的通信方向时，第一指示信息用于指示终端设备通过物理边链信道向其他终端设备发送目标数据，物理边链信道可以为物理边链控制信道(physical sidelink control channel，PSCCH)、物理边链共享信道(physical sidelink shared channel，PSSCH)、物理边链发现信道(physical sidelink discovery channel，PSDCH)等。
应理解，第一指示信息也可以不包括上述时序参数K0或K2，或者上述时序参数K0或K2的值缺省，终端设备可以以预设时长作为接收DCI的时间与终端设备在第一方向上传输目标数据的第一时间之间的时间间隔，终端设备可以根据该预设时长确定发送目标数据的第一时间。另外，第一指示信息还可以包括其它信息，例如资源分配(resource allocation，RA)信息、调制编码方式、载波指示域等。
第二指示信息可以指示终端设备将激活的下行BWP切换为目标下行BWP，也可以指示终端设备将激活的上行BWP切换为目标上行BWP，还可以指示终端设备将激活的边链路方向的BWP切换为目标BWP。所谓将激活的BWP切换为目标BWP，指的是去激活原激活的BWP以及激活目标BWP。该原激活的BWP与目标BWP之间可以有重叠区域，也可以没有重叠区域，可选的，原激活的BWP与目标BWP中的一个可以覆盖另一个。第二指示信息至少包括一个目标BWP的索引信息。
应理解，本申请实施例中的目标BWP的个数可以为一个，也可以为多个，本申请实施例不予限定。在目标BWP的数量大于1时，多个目标BWP所在的方向可以不同，换言之，第二指示信息可以既指示终端设备将激活的下行BWP切换为目标下行BWP，又指示终端设备将激活的上行BWP切换为目标上行BWP。
还应理解，第一指示信息指示的目标数据的传输方向与第二指示信息指示的目标BWP所在的上下行方向可以相同，例如，第一指示信息用于指示终端设备接收PDSCH数据，第二指示信息用于指示终端设备将激活的下行BWP切换为目标下行BWP。第一指示信息指示的目标数据的传输方向与第二指示信息指示的目标BWP所在的上下行方向也可以不相同，例如，第一指示信息用于指示终端设备发送PUSCH数据，第 二指示信息用于指示终端设备将激活的下行BWP切换为目标下行BWP；又例如，第一指示信息用于指示终端设备发送边链路数据，第二指示信息用于指示终端设备将激活的上行BWP切换为目标上行BWP。
另外，DCI除了包括第一指示信息以及第二指示信息之外，还可以包括其它信息，例如，DCI还可以冗余比特、循环冗余校验(cyclic redundancy check，CRC)等。
步骤102、终端设备接收网络设备发送的DCI。
步骤103、终端设备根据第二指示信息，将激活的BWP切换为目标BWP。
上述技术方案中，网络设备可以向终端设备发送DCI，既调度终端设备进行数据传输，又指示终端设备切换激活的BWP，由于通过一个DCI同时实现数据调度以及BWP切换指示，效率较高。
可选的，在步骤102之后，还包括步骤104：终端设备根据第一指示信息，与网络设备传输目标数据。
下面介绍第一指示信息指示的目标数据的传输方向与第二指示信息指示的目标BWP所在的上下行方向相同时的带宽切换方法。为了便于描述，下面以第一方向为上行方向或下行方向为例予以说明，应理解，下面介绍的带宽切换方法也可以适用于第一方向为边链路方向的情形。
图2示出本申请实施例的另一带宽切换方法，包括：
步骤201、网络设备向终端设备发送DCI，该DCI包括第一指示信息以及第二指示信息，第一指示信息用于指示终端设备在第一时间在第一方向上传输目标数据，第二指示信息用于指示终端设备将第一方向上激活的BWP切换为目标BWP，第一方向为上行方向或下行方向。
步骤202、终端设备接收网络设备发送的DCI。
步骤203、终端设备根据第一指示信息，在第一时间在第一方向上传输目标数据。
步骤204、终端设备根据第二指示信息，在第二时间将第一方向上激活的BWP切换为目标BWP。
上述技术方案中，网络设备可以通过一个DCI同时实现同一方向上的数据调度以及BWP切换指示，效率较高。
作为一种可选的方式，步骤204中的第二时间晚于步骤203中的第一时间，其实现方式可以为多种，包括：
a、终端设备将第一时间的预设时长后的时刻作为第二时间。例如，终端设备确定该第二时间为第一时间后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。其中，所谓时隙(slot)、迷你时隙(mini slot)的区别为：迷你时隙包含的符号少于时隙包含的符号，例如，时隙包含14个符号，迷你时隙包含7个符号。应理解，终端设备在第二时间将激活的BWP切换为目标BWP，可以指的是在上述第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号的起始时刻将激活的BWP切换为目标BWP，也可以指在上述第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号对应的时间段内的任意一个时刻将激活的BWP切换为目标BWP。
b、网络设备确定第一时间之后的一时刻作为第二时间，在第二指示信息中添加时序参数Ks，Ks指示该第二时间。例如，网络设备确定该第二时间为第一时间后的第 一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。应理解，第二指示信息也可以不包括上述时序参数Ks，或者上述时序参数Ks的值缺省，终端设备可以以设定时长作为接收DCI的时间与终端设备将第一方向上激活的BWP切换为目标BWP的第二时间之间的时间间隔，终端设备可以根据该设定时长确定该第二时间。
图3示出DCI中第一指示信息指示终端设备在第一时间接收目标数据、第二指示信息指示终端设备切换激活的BWP的一种可能情形。在时隙1开始时，终端设备激活的下行BWP为BWP1，终端设备在BWP1接收DCI，根据DCI中的第一指示信息中的时序参数K0确定第一时间，在第一时间接收目标数据，然后，在第一时间后的第一个时隙(即时隙2)的起始时刻(即第二时间)将激活的BWP由BWP1切换为BWP2。然后，终端设备可以在BWP2上接收下行数据(PDSCH数据)。
不同BWP的带宽、子载波间隔可能不同，上述技术方案中终端设备先(在第一时间)在原激活的BWP上传输目标数据，后(在第二时间)切换激活的BWP，可以避免在先激活目标BWP，后在目标BWP上传输目标数据时，因原激活的BWP与目标BWP的带宽不同导致第一指示信息中RA无法适应目标BWP，进而致使目标数据无法正常传输的情形，还可以避免因原激活的BWP与目标BWP的子载波间隔不同导致原激活的BWP与目标BWP中时隙长度的长度不同，进而致使DCI中时域资源指示与时序指示均出错的情形。
图4示出本申请实施例的又一带宽切换方法，包括：
步骤301、网络设备向终端设备发送DCI，该DCI包括第一指示信息以及第二指示信息，第一指示信息用于指示终端设备在第一时间接收目标数据，第二指示信息用于指示终端设备将激活的下行BWP切换为目标下行BWP。
步骤302、终端设备接收网络设备发送的DCI。
步骤303、终端设备在第一时间接收目标数据。若接收成功，转向步骤304，若接收失败，则转向步骤305。
步骤304、终端设备向网络设备发送确认(acknowledgement，ACK)消息，该ACK消息表示目标数据接收成功。转向步骤306。
步骤305、终端设备向网络设备发送否定确认(negative ACK，NACK)消息，该NACK消息表示目标数据接收失败。转向步骤306。
步骤306、终端设备将激活的下行BWP切换为目标下行BWP。
应理解，步骤301～步骤306的方案同样适用于第一指示信息指示终端设备在第一时间发送目标数据、第二指示信息指示终端设备将激活的上行BWP切换为目标上行BWP的情形，在该场景下，终端设备在第一时间向网络设备发送目标数据之后，等待网络设备返回的ACK消息或NACK消息，在接收该ACK消息或NACK消息中任一之后，才响应第二指示信息，将激活的上行BWP切换为目标上行BWP。
上述技术方案中，终端设备在第一时间在原激活的BWP上传输过目标数据，并且终端设备已经知道目标数据是否传输成功，并在确认目标数据是否传输成功后进行激活BWP的切换，能够适量地兼顾目标数据的传输正确性与BWP的切换的及时性，提高通信系统的效率。
可选的，步骤306中，终端设备在第二时间将激活的下行BWP切换为目标下行BWP，该第二时间为步骤304中终端设备发送ACK消息的时刻后的第一个无线帧/第 一个子帧/第一个时隙/第一个迷你时隙/第一个符号，或者，该第二时间为步骤305中终端设备发送NACK消息的时刻后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
图5示出DCI中第一指示信息指示终端设备在第一时间接收目标数据、第二指示信息指示终端设备切换激活的BWP的一种可能情形。在时隙1开始时，终端设备激活的下行BWP为BWP1，终端设备在BWP1接收DCI，根据DCI中的第一指示信息中的时序参数K0确定第一时间，在第一时间接收目标数据，然后，终端设备向网络设备发送ACK消息或NACK消息，并在发送ACK消息或NACK消息中任一后的第一个时隙(即时隙2)的起始时刻(即第二时间)将激活的BWP由BWP1切换为BWP2。然后，终端设备可以在BWP2上接收下行数据(PDSCH数据)。
针对第一指示信息指示终端设备在第一时间发送目标数据、第二指示信息指示终端设备将激活的上行BWP切换为目标上行BWP的情形，终端设备在第二时间将激活的上行BWP切换为目标上行BWP，该第二时间为终端设备接收ACK消息的时刻后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号，或者，该第二时间为终端设备接收NACK消息的时刻后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
上述技术方案中，终端设备能够在确认目标数据是否传输成功后立即进行激活BWP的切换，尽可能保证BWP的切换的及时性。
可替换的，参照图6，上述步骤305之后，不转向步骤306，而是等待网络设备接收该NACK消息之后，基于重传机制，向终端设备重传目标数据，终端设备接收重传的目标数据，如果成功则转向步骤306，如果失败则向网络设备发送NACK消息启动重传，直至成功接收目标数据，才执行步骤306。可选的，终端设备可以在第i次(例如，i等于1)接收该重传的目标数据之后，无论向网络设备发送ACK消息还是NACK消息，均转向执行步骤306。
针对第一指示信息指示终端设备在第一时间发送目标数据、第二指示信息指示终端设备将激活的上行BWP切换为目标上行BWP的情形，终端设备在第一时间向网络设备发送目标数据之后，等待网络设备返回的ACK消息或NACK消息，若接收到NACK消息，则向网络设备重传目标数据，直至接收网络设备返回ACK消息，才响应第二指示信息，将激活的上行BWP切换为目标上行BWP。可选的，终端设备可以在第i次(例如，i等于1)发送该重传的目标数据之后，无论接收ACK消息还是NACK消息，均响应第二指示信息，将激活的上行BWP切换为目标上行BWP。
应理解，本替换的方案中，终端设备将激活的下行BWP切换为目标下行BWP的时间可以为：终端设备发送ACK消息的时刻后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。终端设备将激活的上行BWP切换为目标上行BWP的时间可以为：终端设备接收ACK消息的时刻后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
上述技术方案中，终端设备在确认目标数据传输成才切换激活的BWP，避免在目标数据传输失败后的目标数据重传时，终端已切换至目标BWP，在目标BWP上重传目标数据时因原激活的BWP与目标BWP的带宽或子载波间隔不同导致目标数据重传失败的情形。不仅如此，终端设备可以在确认目标数据传输成功后及时切换激活的 BWP，减少激活BWP的耗时。
图7示出本申请实施例的又一带宽切换方法，包括：
步骤401、网络设备向终端设备发送DCI，该DCI包括第一指示信息以及第二指示信息，第一指示信息用于指示终端设备在第一时间在第一方向上传输目标数据，第二指示信息用于指示终端设备在第二时间将第一方向上激活的BWP切换为目标BWP，第一方向为上行方向或下行方向。
在第一方向为下行方向时，第一指示信息可以为PDSCH调度信息，包括时序参数K0，K0指示终端设备接收DCI的时间与终端设备在PDSCH上接收目标数据的第一时间之间的时间间隔，终端设备根据该K0可以确定接收目标数据的第一时间。第二指示信息用于指示终端设备将激活的下行BWP切换为目标下行BWP，包括时序参数Ks1，Ks1指示终端设备接收DCI的时间与终端设备切换为目标下行BWP的第二时间之间的时间间隔，终端设备根据该Ks1可以确定切换为目标下行BWP的第二时间。
在第一方向为上行方向时，第一指示信息可以为PUSCH调度信息，包括时序参数K2，K2指示终端设备接收DCI的时间与终端设备在PUSCH上发送目标数据的第一时间之间的时间间隔，终端设备根据该K2可以确定发送目标数据的第一时间。第二指示信息用于指示终端设备将激活的上行BWP切换为目标上行BWP，包括时序参数Ks2，Ks2指示终端设备接收DCI的时间与终端设备切换为目标上行BWP的第二时间之间的时间间隔，终端设备根据该Ks2可以确定切换为目标上行BWP的第二时间。
应理解，第一指示信息也可以不包括上述时序参数K0或K2，或者上述时序参数K0或K2的值缺省，终端设备可以以预设时长作为接收DCI的时间与终端设备在第一方向上传输目标数据的第一时间之间的时间间隔，终端设备可以根据该预设时长确定发送目标数据的第一时间。
步骤402、终端设备接收网络设备发送的DCI。在第二时间晚于第一时间时，转向步骤403。
步骤403、终端设备在第一时间、通过第二时间之前激活的BWP、在第一方向上传输目标数据。转向步骤404。
步骤404、终端设备在第二时间将第一方向上激活的BWP切换为目标BWP。
图8示出DCI中第一指示信息指示终端设备在第一时间接收目标数据、第二指示信息指示终端设备切换激活的BWP的一种可能情形。在时隙1开始时，终端设备激活的下行BWP为BWP1，终端设备在BWP1接收DCI，根据DCI中的第一指示信息中的时序参数K0确定第一时间，在第一时间接收目标数据，然后，根据DCI中的第一指示信息中的时序参数Ks1确定第二时间，在第二时间将激活的BWP由BWP1切换为BWP2。然后，终端设备可以在BWP2上接收下行数据(PDSCH数据)。
上述技术方案，网络设备可以向终端设备发送DCI，该DCI既包括指示终端设备传输目标数据的第一指示信息，也包括指示终端设备切换激活的BWP的第二指示信息，该第一指示信息包括指示传输目标数据的(第一)时间的时序参数，第二指示信息包括指示切换激活的BWP的(第二)时间的时序参数，终端设备可以根据DCI的指示，在第一时刻传输目标数据以及在第二时刻切换激活的BWP，高效地通过一个DCI实现数据调度以及BWP切换指示。网络设备还可以将切换BWP的第二时间设置地晚于传输目标数据的第一时间，进而可以避免因原激活的BWP与目标BWP的带宽 不同导致第一指示信息中RA无法适应目标BWP，进而致使目标数据无法正常传输的情形，还可以避免因原激活的BWP与目标BWP的子载波间隔不同导致原激活的BWP与目标BWP中时隙长度的长度不同，进而致使DCI中时域资源指示与时序指示均出错的情形。
作为一种可选的方式，在步骤402之后，若第一时间晚于第二时间，则转向步骤404。在步骤404执行结束后，转向步骤405。
步骤405、终端设备在第一时间、通过已激活的目标BWP、在第一方向上传输目标数据。
上述技术方案中，网络设备可以将第一时间设置地晚于第二时间，以便终端设备能够及时切换激活的BWP，终端设备能够在切换后的目标BWP上传输目标数据，兼顾目标数据的传输以及BWP切换的及时性。
可选的，步骤405中，若目标BWP与原激活BWP的带宽和/或子载波间隔不同，则终端设备根据目标BWP的带宽和/或子载波间隔来解析DCI中的字段。例如，针对DCI中的RA字段，如果目标带宽是原带宽的2倍，则RA字段指示的资源颗粒度调整为原带宽资源颗粒度的2倍。
可替换的，参照图9，若第一时间晚于第二时间，则转向步骤404。在步骤404执行结束后，取消响应第一指示信息，以避免目标数据传输失败。可选的，终端设备可以向网络设备发送重新调度请求，请求网络设备基于已激活的目标BWP重新调度目标数据。
结合上述所有可能的实现方式，终端设备在根据第二指示信息，将激活的下行BWP切换为目标下行BWP后，可以在目标下行BWP上监听PDCCH，保证终端设备能够在切换后的目标下行BWP接收网络设备发送的DCI。或者，终端设备在根据第二指示信息，将激活的上行BWP切换为目标上行BWP后，在有上行数据调度或需要反馈上行控制信息时，通过该目标上行BWP向网络设备发送对应信息，保证终端设备能够及时向网络设备发送信息。
结合上述所有可能的实现方式，终端设备在根据第二指示信息，将激活的BWP切换为目标BWP之后，可以向网络设备发送表示BWP切换成功的响应消息，以便网络设备可以通过该目标BWP与终端设备通信或对终端设备进行调度。
图10示出本申请实施例的一种带宽切换装置50，该装置50可用于实现图1至图9任一对应的带宽切换方法中终端设备的功能。该装置50包括：收发模块51以及响应模块52。收发模块51用于接收网络设备发送的下行控制信息DCI，所述DCI包括第一指示信息以及第二指示信息，所述第一指示信息用于指示所述装置传输目标数据，所述第二指示信息用于指示所述装置将激活的带宽部分BWP切换为目标BWP。响应模块52用于根据所述第二指示信息，将激活的BWP切换为所述目标BWP。
作为一种可选的方式，所述第一指示信息具体用于指示所述装置在第一时间在第一方向上传输目标数据，所述第二指示信息具体用于指示所述装置将所述第一方向上激活的BWP切换为目标BWP，所述第一方向为上行方向、下行方向或边链路方向。
作为一种可选的方式，所述收发模块51还用于：根据所述第一指示信息，在第一时间在所述第一方向上传输所述目标数据；所述响应模块52，具体用于根据所述第二指示信息，在第二时间将所述第一方向上激活的BWP切换为所述目标BWP。
作为一种可选的方式，所述第二时间为所述第一时间后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
作为一种可选的方式，所述收发模块51还用于：在第一时间在所述第一方向上传输所述目标数据之后，在所述第一方向为下行方向时，向所述网络设备发送确认ACK消息或否定确认NACK消息；在所述第一方向为上行方向时，接收所述网络设备发送的ACK消息或NACK消息；其中，ACK消息表示目标数据接收成功，NACK消息表示目标数据接收失败。
作为一种可选的方式，在所述第一方向为下行方向时，所述第二时间为所述收发模块发送ACK消息之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号；和/或，在所述第一方向为上行方向时，所述第二时间为所述收发模块接收ACK消息之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
作为一种可选的方式，在所述第一方向为下行方向时，所述第二时间为所述收发模块发送ACK消息或NACK消息中任一之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号；和/或，在所述第一方向为上行方向时，所述第二时间为所述收发模块接收ACK消息或NACK消息中任一之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
作为一种可选的方式，所述第二指示信息包括时序参数，所述时序参数用于指示第二时间；所述响应模块52具体用于：在第二时间将所述第一方向上激活的BWP切换为所述目标BWP。
作为一种可选的方式，所述响应模块52还用于：在所述收发模块接收所述DCI之后，若所述第二时间晚于所述第一时间，则在所述第一时间、通过所述第二时间之前激活的BWP、在所述第一方向上传输所述目标数据。
作为一种可选的方式，所述响应模块52具体用于：在所述收发模块接收所述DCI之后，若所述第一时间晚于所述第二时间，则在所述第一时间、通过已激活的所述目标BWP、在所述第一方向上传输所述目标数据。
作为一种可选的方式，所述响应模块具体用于：在所述收发模块接收所述DCI之后，若所述第一时间晚于所述第二时间，则中止响应所述第一指示信息。
本发明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，在本发明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。
其中，集成的模块既可以采用硬件的形式实现时，如图11所示，装置50器可以包括处理器61。上述响应模块52对应的实体的硬件可以为处理器61。处理器61，可以是一个或多个中央处理单元(central processing unit，CPU)，或者为数字处理模块等。装置50还可以包括收发器62，处理器62通过收发器62接收网络设备发送的数据以及控制信息，上述收发模块51对应的实体的硬件可以是收发器62。该装置50还包括：存储器63，用于存储处理器61执行的程序。存储器63可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器63是能够用于携带或存储具有指令或数据结构形式的期望的程序代 码并能够由计算机存取的任何其他介质，但不限于此。
上述装置50及其组成模块的实现方式可以参照图1至图9任一对应的带宽切换方法中由终端设备执行的步骤，在此不再重复。
图12示出本申请实施例的带宽切换装置70，该装置70可用于实现图1至图9任一对应的带宽切换方法中网络设备的功能。该装置70包括：发送模块71，用于向终端设备发送DCI，所述DCI包括第一指示信息以及第二指示信息，所述第一指示信息用于指示所述终端设备传输目标数据，所述第二指示信息用于指示所述终端设备将激活的带宽部分BWP切换为目标BWP。
作为一种可选的方式，装置70还包括处理模块72，用于生成所述DCI。
作为一种可选的方式，装置70还包括接收模块73，用于接收终端设备发送的数据以及请求信息。
作为一种可选的方式，所述第一指示信息具体用于指示所述终端设备在第一时间在第一方向上传输目标数据，所述第二指示信息具体用于指示所述终端设备将所述第一方向上激活的BWP切换为目标BWP，所述第一方向为上行方向、下行方向或边链路方向。
作为一种可选的方式，所述第二指示信息包括时序参数，所述时序参数用于指示第二时间，所述第二指示信息具体用于指示所述终端设备在所述第二时间将所述第一方向上激活的BWP切换为目标BWP。
本发明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，在本发明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。
其中，集成的模块既可以采用硬件的形式实现时，可以继续参照如图11，装置70器可以包括处理器。上述处理模块72对应的实体的硬件可以为处理器。处理器可以是一个或多个CPU，或者为数字处理模块等。装置70还可以包括收发器，处理器通过收发器接收终端设备发送的数据以及请求信息，上述发送模块71、接收模块73对应的实体的硬件可以是收发器。该装置70还包括：存储器，用于存储处理器执行的程序。存储器可以是非易失性存储器，比如硬盘或固态硬盘等，还可以是易失性存储器，例如随机存取存储器。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
上述装置70及其组成模块的实现方式可以参照图1至图9任一对应的带宽切换方法中由网络设备执行的步骤，在此不再重复。
本申请实施例还提供一种计算机可读存储介质，所述可读存储介质中存储有计算机指令，所述指令在计算机上运行时，使得计算机执行图1至图9任一对应的带宽切换方法中由终端设备执行的步骤。
本申请实施例还提供一种计算机可读存储介质，所述可读存储介质中存储有计算机指令，所述指令在计算机上运行时，使得计算机执行图1至图9任一对应的带宽切换方法中由网络设备执行的步骤。
本申请实施例还提供一种计算机程序产品，所述计算机程序产品在计算机上运行时，使得计算机执行图1至图9任一对应的带宽切换方法中由终端设备执行的步骤。
本申请实施例还提供一种计算机程序产品，所述计算机程序产品在计算机上运行时，使得计算机执行图1至图9任一对应的带宽切换方法中由网络设备执行的步骤。
本申请实施例还提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以执行图1至图9任一对应的带宽切换方法中由终端设备执行的步骤。
本申请实施例还提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以执行图1至图9任一对应的带宽切换方法中由网络设备执行的步骤。
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。
以上，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (31)

  1. 一种带宽切换方法，其特征在于，包括：
    终端设备接收网络设备发送的下行控制信息DCI，所述DCI包括第一指示信息以及第二指示信息，所述第一指示信息用于指示所述终端设备传输目标数据，所述第二指示信息用于指示所述终端设备将激活的带宽部分BWP切换为目标BWP；
    所述终端设备根据所述第二指示信息，将激活的BWP切换为所述目标BWP。
  2. 根据权利要求1所述的方法，其特征在于，所述第一指示信息具体用于指示所述终端设备在第一方向上传输目标数据，所述第二指示信息具体用于指示所述终端设备将所述第一方向上激活的BWP切换为目标BWP，所述第一方向为上行方向、下行方向或边链路方向。
  3. 根据权利要求1或2所述的方法，其特征在于，在所述终端设备接收所述DCI之后，还包括：
    所述终端设备根据所述第一指示信息，在所述第一指示信息指示的第一时间、在所述第一方向上传输所述目标数据；
    所述终端设备根据所述第二指示信息，将激活的BWP切换为所述目标BWP，包括：
    所述终端设备在第二时间将所述第一方向上激活的BWP切换为所述目标BWP。
  4. 根据权利要求3所述的方法，其特征在于，所述第二时间为所述第一时间后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
  5. 根据权利要求3所述的方法，其特征在于，在所述终端设备在第一时间在所述第一方向上传输所述目标数据之后，还包括：
    在所述第一方向为下行方向时，所述终端设备向所述网络设备发送确认ACK消息或否定确认NACK消息；
    在所述第一方向为上行方向时，所述终端设备接收所述网络设备发送的ACK消息或NACK消息；
    其中，ACK消息表示目标数据接收成功，NACK消息表示目标数据接收失败。
  6. 根据权利要求5所述的方法，其特征在于：
    在所述第一方向为下行方向时，所述第二时间为所述终端设备发送ACK消息之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号；和/或
    在所述第一方向为上行方向时，所述第二时间为所述终端设备接收ACK消息之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
  7. 根据权利要求5所述的方法，其特征在于：
    在所述第一方向为下行方向时，所述第二时间为所述终端设备发送ACK消息或NACK消息中任一之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号；和/或
    在所述第一方向为上行方向时，所述第二时间为所述终端设备接收ACK消息或NACK消息中任一之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
  8. 根据权利要求2所述的方法，其特征在于，所述第一指示信息具体用于指示所 述终端设备在第一时间、在第一方向上传输目标数据；所述第二指示信息包括时序参数，所述时序参数用于指示第二时间；
    所述终端设备根据所述第二指示信息，将激活的BWP切换为所述目标BWP，包括：
    所述终端设备在第二时间将所述第一方向上激活的BWP切换为所述目标BWP。
  9. 根据权利要求8所述的方法，其特征在于，在所述终端设备接收所述DCI之后，还包括：
    若所述第二时间晚于所述第一时间，则所述终端设备在所述第一时间、通过所述第二时间之前激活的BWP、在所述第一方向上传输所述目标数据。
  10. 根据权利要求8所述的方法，其特征在于，在所述终端设备接收所述DCI之后，还包括：
    若所述第一时间晚于所述第二时间，则所述终端设备在所述第一时间、通过已激活的所述目标BWP、在所述第一方向上传输所述目标数据。
  11. 根据权利要求8所述的方法，其特征在于，在所述终端设备接收所述DCI之后，还包括：
    若所述第一时间晚于所述第二时间，则所述终端设备中止响应所述第一指示信息。
  12. 一种带宽切换方法，其特征在于，包括：
    网络设备向终端设备发送DCI，所述DCI包括第一指示信息以及第二指示信息，所述第一指示信息用于指示所述终端设备传输目标数据，所述第二指示信息用于指示所述终端设备将激活的带宽部分BWP切换为目标BWP。
  13. 根据权利要求12所述的方法，其特征在于，所述第一指示信息具体用于指示所述终端设备在第一方向上传输目标数据，所述第二指示信息具体用于指示所述终端设备将所述第一方向上激活的BWP切换为目标BWP，所述第一方向为上行方向、下行方向或边链路方向。
  14. 根据权利要求13所述的方法，其特征在于，所述第二指示信息包括时序参数，所述时序参数用于指示第二时间，所述第二指示信息具体用于指示所述终端设备在所述第二时间将所述第一方向上激活的BWP切换为目标BWP。
  15. 一种带宽切换装置，其特征在于，包括：
    收发模块，用于接收网络设备发送的下行控制信息DCI，所述DCI包括第一指示信息以及第二指示信息，所述第一指示信息用于指示所述装置传输目标数据，所述第二指示信息用于指示所述装置将激活的带宽部分BWP切换为目标BWP；
    响应模块，用于根据所述第二指示信息，将激活的BWP切换为所述目标BWP。
  16. 根据权利要求15所述的装置，其特征在于，所述第一指示信息具体用于指示所述装置在第一方向上传输目标数据，所述第二指示信息具体用于指示所述装置将所述第一方向上激活的BWP切换为目标BWP，所述第一方向为上行方向、下行方向或边链路方向。
  17. 根据权利要求15或16所述的装置，其特征在于，所述收发模块还用于：根据所述第一指示信息，在所述第一指示信息指示的第一时间、在所述第一方向上传输所述目标数据；
    所述响应模块，具体用于根据所述第二指示信息，在第二时间将所述第一方向上 激活的BWP切换为所述目标BWP。
  18. 根据权利要求17所述的装置，其特征在于，所述第二时间为所述第一时间后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
  19. 根据权利要求17所述的装置，其特征在于，所述收发模块，还用于：在第一时间在所述第一方向上传输所述目标数据之后，在所述第一方向为下行方向时，向所述网络设备发送确认ACK消息或否定确认NACK消息；在所述第一方向为上行方向时，接收所述网络设备发送的ACK消息或NACK消息；其中，ACK消息表示目标数据接收成功，NACK消息表示目标数据接收失败。
  20. 根据权利要求19所述的装置，其特征在于：
    在所述第一方向为下行方向时，所述第二时间为所述收发模块发送ACK消息之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号；和/或
    在所述第一方向为上行方向时，所述第二时间为所述收发模块接收ACK消息之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
  21. 根据权利要求19所述的装置，其特征在于：
    在所述第一方向为下行方向时，所述第二时间为所述收发模块发送ACK消息或NACK消息中任一之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号；和/或
    在所述第一方向为上行方向时，所述第二时间为所述收发模块接收ACK消息或NACK消息中任一之后的第一个无线帧/第一个子帧/第一个时隙/第一个迷你时隙/第一个符号。
  22. 根据权利要求16所述的装置，其特征在于，所述第一指示信息具体用于指示所述终端设备在第一时间、在第一方向上传输目标数据；所述第二指示信息包括时序参数，所述时序参数用于指示第二时间；
    所述响应模块具体用于：在第二时间将所述第一方向上激活的BWP切换为所述目标BWP。
  23. 根据权利要求22所述的装置，其特征在于，所述响应模块还用于：在所述收发模块接收所述DCI之后，若所述第二时间晚于所述第一时间，则在所述第一时间、通过所述第二时间之前激活的BWP、在所述第一方向上传输所述目标数据。
  24. 根据权利要求22所述的装置，其特征在于，所述响应模块具体用于：在所述收发模块接收所述DCI之后，若所述第一时间晚于所述第二时间，则在所述第一时间、通过已激活的所述目标BWP、在所述第一方向上传输所述目标数据。
  25. 根据权利要求22所述的装置，其特征在于，所述响应模块具体用于：在所述收发模块接收所述DCI之后，若所述第一时间晚于所述第二时间，则中止响应所述第一指示信息。
  26. 一种带宽切换装置，其特征在于，包括：
    发送模块，用于向终端设备发送DCI，所述DCI包括第一指示信息以及第二指示信息，所述第一指示信息用于指示所述终端设备传输目标数据，所述第二指示信息用于指示所述终端设备将激活的带宽部分BWP切换为目标BWP。
  27. 根据权利要求26所述的装置，其特征在于，所述第一指示信息具体用于指示所述终端设备在第一方向上传输目标数据，所述第二指示信息具体用于指示所述终端 设备将所述第一方向上激活的BWP切换为目标BWP，所述第一方向为上行方向、下行方向或边链路方向。
  28. 根据权利要求27所述的装置，其特征在于，所述第二指示信息包括时序参数，所述时序参数用于指示第二时间，所述第二指示信息具体用于指示所述终端设备在所述第二时间将所述第一方向上激活的BWP切换为目标BWP。
  29. 一种终端设备，其特征在于，包括：
    存储器，用于存储计算机指令；
    收发器，用于与网络设备或其他终端设备通信；
    处理器，与所述存储器以及所述收发器通信连接，用于执行所述计算机指令，以执行如权利要求1-11中任一项所述的方法。
  30. 一种网络设备，其特征在于，包括：
    存储器，用于存储计算机指令；
    收发器，用于与终端设备或其他网络设备通信；
    处理器，与所述存储器以及所述收发器通信连接，用于执行所述计算机指令，以执行如权利要求12-14中任一项所述的方法。
  31. 一种计算机可读存储介质，其特征在于，所述可读存储介质中存储有计算机指令，所述指令在计算机上运行时，使得计算机执行如权利要求1-14中任一项所述的方法。
PCT/CN2018/107100 2017-11-10 2018-09-21 一种带宽切换方法及装置 WO2019091233A1 (zh)

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