WO2023000329A1 - 载波切换方法、装置、终端设备及可读存储介质 - Google Patents

载波切换方法、装置、终端设备及可读存储介质 Download PDF

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Publication number
WO2023000329A1
WO2023000329A1 PCT/CN2021/108246 CN2021108246W WO2023000329A1 WO 2023000329 A1 WO2023000329 A1 WO 2023000329A1 CN 2021108246 W CN2021108246 W CN 2021108246W WO 2023000329 A1 WO2023000329 A1 WO 2023000329A1
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Prior art keywords
carrier
secondary carrier
time slot
scs
slot position
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PCT/CN2021/108246
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English (en)
French (fr)
Inventor
刘洋
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北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to CN202180002281.2A priority Critical patent/CN115918209A/zh
Priority to PCT/CN2021/108246 priority patent/WO2023000329A1/zh
Publication of WO2023000329A1 publication Critical patent/WO2023000329A1/zh

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

Definitions

  • the present disclosure relates to the communication field, and in particular to a carrier switching method, device, terminal equipment and readable storage medium.
  • Hybrid Automatic Repeat reQuest Hybrid Automatic Repeat reQuest
  • the physical uplink control channel (Physical Uplink Control Channel, PUCCH) resource corresponding to the HARQ-ACK feedback can be obtained through the K1 indication. If the PUCCH resource corresponding to K1 is unavailable, the feedback operation is either discarded, retransmission is triggered, or the feedback operation is delayed according to a certain rule.
  • PUCCH Physical Uplink Control Channel
  • Embodiments of the present disclosure provide a carrier switching method, device, terminal equipment, and readable storage medium, and the technical solution is as follows:
  • a carrier switching method comprising:
  • the candidate secondary carrier In response to valid resources existing on the candidate secondary carrier, the candidate secondary carrier is used as a target secondary carrier, where the target secondary carrier is a switched secondary carrier in a carrier switching scenario of a physical channel.
  • a carrier switching device in another aspect, includes: a secondary carrier selection module and a carrier switching module;
  • the secondary carrier selection module is configured to determine candidate secondary carriers based on a selection strategy
  • the carrier switching module is configured to use the candidate secondary carrier as a target secondary carrier in response to effective resources on the candidate secondary carrier, where the target secondary carrier is a switched secondary carrier in a physical channel carrier switching scenario carrier.
  • a terminal device in another aspect, includes:
  • transceiver connected to the processor
  • the processor is configured to load and execute executable instructions to implement the carrier switching method described in the foregoing embodiments of the present disclosure.
  • a chip in another aspect, includes a programmable logic circuit and/or program instructions, and when the chip is running, it is used to implement the carrier switching method as described in the above-mentioned embodiments of the present disclosure.
  • a computer-readable storage medium In another aspect, a computer-readable storage medium is provided. At least one instruction, at least one program, code set or instruction set is stored in the computer-readable storage medium. The at least one instruction, at least one program, code set or instruction set The set is loaded and executed by the processor to implement the carrier switching method described above in the embodiments of the present disclosure.
  • a computer program product or computer program comprising computer instructions stored in a computer readable storage medium.
  • the processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the carrier switching method as described in the foregoing embodiments of the present disclosure.
  • the terminal device selects a candidate secondary carrier based on the selection policy to determine whether it is available, and if there are valid resources on the candidate secondary carrier, the candidate secondary carrier is used as the target secondary carrier after carrier switching. Therefore, when the physical channel resources of the main carrier are not available, the carrier switching behavior of the terminal device is clarified, and the terminal device is helped to switch to an available target secondary carrier, thereby ensuring the reliability and timeliness of transmission on the physical channel.
  • FIG. 1 shows a schematic diagram of carrier aggregation provided by an exemplary embodiment of the present disclosure
  • Fig. 2 shows a block diagram of a communication system provided by an exemplary embodiment of the present disclosure
  • FIG. 3 shows a flowchart of a carrier switching method provided by an exemplary embodiment of the present disclosure
  • FIG. 4 shows a flowchart of a carrier switching method provided by another exemplary embodiment of the present disclosure
  • FIG. 5 shows a schematic diagram of resource search on candidate secondary carriers provided by an exemplary embodiment of the present disclosure
  • Fig. 6 shows a schematic diagram of resource search on candidate secondary carriers provided by another exemplary embodiment of the present disclosure
  • Fig. 7 shows a schematic diagram of resource search on candidate secondary carriers provided by another exemplary embodiment of the present disclosure
  • Fig. 8 shows a structural block diagram of a carrier switching device provided by an exemplary embodiment of the present disclosure
  • Fig. 9 shows a structural block diagram of a terminal device according to an exemplary embodiment of the present disclosure.
  • Carrier aggregation is to aggregate two or more carrier units (Component Carrier, CC) together to support larger transmission bandwidth. As shown in Figure 1, the CA technology can aggregate 2 to 5 carriers together to achieve a maximum transmission bandwidth of 100MHz, effectively improving the uplink and downlink transmission rates.
  • the primary cell (Primary Cell, PCell) is the cell where the terminal equipment establishes the initial connection, or the cell where the RRC connection is reestablished, or the primary cell designated during the cell handover process.
  • the PCell is responsible for radio resource control (Radio Resource Control, RRC) communication with the terminal device.
  • RRC Radio Resource Control
  • the carrier unit corresponding to the PCell is called a Primary Component Carrier (PCC).
  • the secondary cell (Secondary Cell, SCell) is added during RRC reconfiguration to provide additional radio resources, and there is no RRC communication between the SCell and the terminal device.
  • the carrier unit corresponding to the SCell is called a secondary carrier (Secondary Component Carrier, SCC).
  • the network can set the temporarily unused auxiliary carrier to inactive state according to needs, so as to reduce the power consumption of the terminal equipment; it can also quickly activate the auxiliary carrier to meet the transmission needs.
  • the primary carrier of the terminal device cannot be deactivated; the terminal device can only perform data transmission on the activated carrier, and only limited measurements are supported on the deactivated carrier.
  • K1 Time relationship between downlink data transmission and corresponding HARQ codebook feedback (Timing between DL data reception and corresponding acknowledgment).
  • the sending end sends downlink data to the receiving end via the PDSCH in time unit n
  • the receiving end transmits the uplink feedback information corresponding to the downlink data to the sending end on the transmission resource corresponding to time unit n+K1, for example, HARQ- ACK feedback.
  • the base station may pre-configure a set of K1 values, such as ⁇ 1, 2, 3, 4 ⁇ , and send it to the terminal device through RRC signaling. Then the DCI is sent to the terminal device, which is used to inform the terminal device which one in the set the specific value of K1 allocated for the data transmission is.
  • K1 values such as ⁇ 1, 2, 3, 4 ⁇
  • FIG. 2 shows a block diagram of a communication system provided by an exemplary embodiment of the present disclosure.
  • the communication system may include: a core network 11 , an access network 12 and a terminal device 13 .
  • the core network 11 includes several core network devices 110 .
  • the core network device 110 includes access and mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF) and user plane management function (User Plane Function, UPF) and other equipment, wherein, AMF uses For functions such as controlling the access authority of terminal equipment and switching, SMF is used to provide server continuity and uninterrupted user experience of the server, such as: IP address and anchor point changes, etc.
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • UPF User Plane Function
  • the access network 12 includes several access network devices 120 .
  • the access network device 120 may be a base station, and a base station is a device deployed in an access network to provide a wireless communication function for a terminal device.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access points and so on.
  • the names of devices with base station functions may be different, for example, in a long-term evolution (Long Term Evolution, LTE) system, it is called eNodeB or eNB; in 5G new air interface ( In the New Radio (NR) system, it is called gNode B or gNB.
  • LTE Long Term Evolution
  • NR New Radio
  • the name "base station” may describe changes.
  • the foregoing apparatuses for providing wireless communication functions for terminal equipment are collectively referred to as access network equipment.
  • the terminal device 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of terminals (User Equipment, UE), mobile stations ( Mobile Station, MS), terminal (terminal device) and so on.
  • terminal devices User Equipment, UE
  • UE User Equipment
  • MS Mobile Station
  • terminal device terminal device
  • the access network device 120 and the terminal device 13 communicate with each other through a certain air interface technology, such as a Uu interface.
  • 5G-based industrial sensors Industrial sensor
  • surveillance cameras video surveillance
  • wearable devices do not need to support such a large bandwidth, especially industrial sensors, which only need a few megabytes of transmission bandwidth.
  • This type of terminal equipment may be classified as a new terminal type in the enhancement of subsequent 5G versions, and corresponding technical feature improvements will be made.
  • the PUCCH resource corresponding to the HARQ-ACK feedback can be obtained through the K1 indication. If the PUCCH resource corresponding to K1 is unavailable, or the feedback operation is discarded, or retransmission is triggered, or the feedback operation is delayed according to certain rules, the feedback reliability and delay will be affected to a certain extent.
  • SPS semi-persistent scheduling
  • PDSCH Physical Downlink Shared Channel
  • the base station supports carrier aggregation
  • carrier switching can be performed, and the HARQ-ACK feedback can be switched to the PUCCH of the secondary cell, which not only does not require delay on the primary cell Feedback or trigger HARQ-ACK retransmission reduces the HARQ-ACK feedback delay and ensures the reliability and efficiency of HARQ-ACK feedback.
  • carrier switching can also reduce interference and achieve load balancing.
  • the terminal device selects a candidate secondary carrier based on the selection strategy to determine whether it is available, and if there are valid resources on the candidate secondary carrier, the candidate secondary carrier is used as the carrier switching The final target secondary carrier, so that when the physical channel resources of the primary carrier are not available, the carrier switching behavior of the terminal device is clarified, and the terminal device is helped to switch to the available target secondary carrier, thereby ensuring the reliability of transmission on the physical channel and timeliness.
  • FIG. 3 shows a flow chart of a carrier switching method provided by an exemplary embodiment of the present disclosure. Taking this method applied to a terminal device as an example, as shown in FIG. 3 , the method includes:
  • Step 301 Determine candidate secondary carriers based on a selection strategy.
  • the terminal device selects a candidate secondary carrier from multiple secondary carriers based on a selection policy.
  • the selection strategy is a strategy used to assist the terminal device in selecting a candidate secondary carrier from multiple secondary carriers.
  • the selection strategy may be called: switching strategy, priority strategy, first strategy, strategy, etc., which is not limited in this embodiment of the present disclosure.
  • the selection strategy is predefined by communication standards.
  • each secondary carrier corresponds to a handover priority
  • the terminal device selects candidate secondary carriers from multiple secondary carriers according to the order of switching priority from high to low.
  • Step 302 In response to effective resources exist on the candidate secondary carrier, use the candidate secondary carrier as a target secondary carrier, where the target secondary carrier is a switched secondary carrier in a carrier switching scenario of a physical channel.
  • the terminal device judges whether the candidate secondary carrier is available. If the candidate secondary carrier is available, that is, if there are valid resources on the candidate secondary carrier, the terminal device uses the candidate secondary carrier as the target secondary carrier to perform carrier switching.
  • effective resources refer to resources supporting transmission on a physical channel, and the resources include at least one of the following resource types: time domain resources, frequency domain resources, and code domain resources.
  • the physical channel includes at least any of the following:
  • the carrier switching method shown in the embodiment of the present disclosure is applicable to PUCCH carrier switching.
  • PUSCH Physical Uplink Shared Channel
  • the carrier switching method shown in the embodiment of the present disclosure is applicable to PUSCH carrier switching.
  • the carrier switching method shown in the embodiment of the present disclosure is applicable to PDCCH carrier switching.
  • PDSCH Physical Downlink Shared Channel
  • the carrier switching method shown in the embodiment of the present disclosure is applicable to PDSCH carrier switching.
  • the terminal device selects the candidate secondary carrier based on the selection policy to determine whether it is available. If there are valid resources on the candidate secondary carrier , taking the candidate secondary carrier as the target secondary carrier after carrier switching, so that when the physical channel resources of the primary carrier are unavailable, the carrier switching behavior of the terminal device is clarified, and the terminal device is helped to switch to an available target secondary carrier, thereby The reliability and timeliness of transmission on the physical channel are guaranteed.
  • the selection strategy includes at least one of the following strategies:
  • the first selection strategy includes: selecting a first secondary carrier having the same subcarrier spacing (SubCarrier Spacing, SCS) as the primary carrier as a candidate secondary carrier.
  • SCS subcarrier Spacing
  • the first secondary carrier may be a time division duplex (Time Division Duplexing, TDD) carrier, or may be a frequency division duplex (Frequency Division Duplexing, FDD) carrier.
  • the second selection strategy includes: selecting a second secondary carrier using a symmetrical frequency spectrum FDD as a candidate secondary carrier.
  • FDD refers to a duplex mode in which uplink transmission and downlink transmission use different carrier frequencies, but can transmit and receive at the same time, and FDD is regarded as a symmetrical spectrum.
  • the SCS of the main carrier is 15KHz, and if the PUCCH is unavailable due to a collision, the second secondary carrier with symmetrical frequency spectrum FDD will be used as the candidate secondary carrier.
  • the third selection strategy includes: among the secondary carriers using the asymmetric spectrum TDD, selecting the third secondary carrier as the candidate secondary carrier according to the order of SCS from high to low.
  • TDD refers to a duplex mode in which uplink transmission and downlink transmission use the same carrier frequency and are only distinguished by time
  • TDD is regarded as an asymmetric spectrum
  • the priority of the first selection strategy is higher than that of the second selection strategy, and the priority of the second selection strategy is higher than that of the third selection strategy.
  • the priority of the selection strategy is used to indicate the order in which different selection strategies are considered when determining the candidate secondary carrier.
  • the priority of the first selection strategy is greater than the priority of the second selection strategy
  • the priority of the second selection strategy is greater than the priority of the third selection strategy means: first consider the first selection strategy to select the candidate secondary carrier, If there is no corresponding first secondary carrier in the first selection strategy or the first secondary carrier is unavailable, consider the second selection strategy to select a candidate secondary carrier, and there is no corresponding second secondary carrier in the second selection strategy Or in a case where the second secondary carrier is unavailable, a third selection strategy is considered to select a candidate secondary carrier.
  • the terminal device selects the candidate secondary carrier based on the selection policy to determine whether it is available. If there are valid resources on the candidate secondary carrier , taking the candidate secondary carrier as the target secondary carrier after carrier switching, so that when the physical channel resources of the primary carrier are unavailable, the carrier switching behavior of the terminal device is clarified, and the terminal device is helped to switch to an available target secondary carrier, thereby The reliability and timeliness of transmission on the physical channel are guaranteed.
  • the carrier switching method provided by the embodiment of the present disclosure provides three selection strategies with different priorities, namely, the first selection strategy, the second selection strategy, and the third selection strategy, to help the terminal device select a suitable carrier based on the above selection strategy.
  • the auxiliary carrier performs carrier switching to improve the success rate of carrier switching.
  • Fig. 4 is a flowchart of a carrier switching method provided by an exemplary embodiment of the present disclosure. Taking the method applied to a terminal device as an example, as shown in Fig. 4, the method includes:
  • Step 401 Determine candidate secondary carriers based on a selection strategy.
  • step 301 For the specific implementation manner of this step, reference may be made to the above-mentioned step 301, and details are not described here.
  • Step 402 Search for resources based on the position of the K1' time slot, and search for valid resources on the candidate secondary carrier.
  • the K1' time slot position is the time slot position corresponding to the K1 time slot position of the primary carrier on the candidate secondary carrier. That is, the terminal device determines the K1' time slot position of the candidate secondary carrier based on the K1 time slot position of the main carrier, and performs resource search based on the K1' time slot position to find effective resources on the candidate secondary carrier.
  • the position of the K1 time slot of the main carrier is determined based on the K1 indication issued by the network device.
  • the K1' time slot position includes at least one time slot position.
  • step 402 is exemplarily described.
  • the K1' slot position in response to the SCS of the candidate secondary carrier being equal to the SCS of the primary carrier, the K1' slot position includes the first latest K1' slot position, and the first latest K1' slot position is equal to the K1 slot Position:
  • the terminal device searches sequentially from the first time slot interval until it finds a valid resource on the candidate secondary carrier, or until it reaches the first and latest K1' time slot position.
  • the network device sends downlink data to the terminal device at time slot 0, and the first time slot interval refers to time slot 1.
  • sequential searching refers to searching according to the order of time domain positions from early to late.
  • the sequential search may be referred to as: forward search, forward search, forward search, forward search, sequential search, etc., which is not limited in the embodiments of the present disclosure.
  • the terminal device can determine a latest slot position on the candidate secondary carrier: the first latest The K1' time slot position, and the first and latest K1' time slot position is equal to the K1 time slot position, the terminal device searches sequentially from the first time slot interval until it finds a valid resource on the candidate secondary carrier, or until it reaches the first time slot interval - up to the latest K1' slot position.
  • the first and latest K1' time slot position is equal to K1 time slot position is equal to PUCCH time slot 2
  • the K1' time slot position in response to the SCS of the candidate secondary carrier being greater than the SCS of the main carrier, the K1' time slot position includes the second earliest K1' time slot position and the second latest K1' time slot position, and the second earliest K1' time slot position 'The value of the time slot position is equal to the SCS of the candidate secondary carrier/the SCS of the main carrier*(K1-1)+1, and the second latest K1'The value of the time slot position is equal to the SCS of the candidate secondary carrier/the SCS of the main carrier /*K1;
  • the terminal device searches sequentially from the second earliest K1' time slot position until it finds a valid resource on the candidate secondary carrier, or until it reaches the second latest K1' time slot position.
  • sequential searching refers to searching according to the order of time domain positions from early to late.
  • the sequential search may be referred to as: forward search, forward search, forward search, forward search, sequential search, etc., which is not limited in the embodiments of the present disclosure.
  • the terminal device may determine a latest slot position on the candidate secondary carrier: The second latest K1' time slot position, and one earliest time slot position: the second earliest K1' time slot position, and the value of the second earliest K1' time slot position is equal to the SCS/primary carrier of the candidate secondary carrier SCS*(K1-1)+1, the value of the second latest K1' time slot position is equal to the SCS of the candidate secondary carrier/the SCS of the main carrier/*K1, and the terminal equipment starts from the second earliest K1' time slot position Search until a valid resource on the candidate secondary carrier is found, or until the second latest K1' slot position is reached.
  • Pcell SCS 15KHz
  • Scell SCS 60KHz
  • the K1' time slot position in response to the SCS of the candidate secondary carrier being smaller than the SCS of the main carrier, the K1' time slot position includes the third K1' time slot position, and the value of the third K1' time slot position is equal to (candidate secondary carrier The SCS of the main carrier/the SCS*K1 of the primary carrier) is rounded up; the terminal device searches sequentially from the first symbol position of the third K1' slot position until it finds and determines a valid resource on the candidate secondary carrier, or until until the last symbol position of the third K1' slot is reached.
  • sequential searching refers to searching according to the order of time domain positions from early to late.
  • the sequential search may be referred to as: forward search, forward search, forward search, forward search, sequential search, etc., which is not limited in the embodiments of the present disclosure.
  • the terminal device can determine a slot position on the candidate secondary carrier: the third K1 'Time slot position, and the third K1' time slot position is equal to the rounded-up value of (SCS of the candidate secondary carrier/SCS*K1 of the main carrier), the terminal device starts from the first symbol position of the third K1' time slot position Start searching sequentially until a valid resource on the candidate secondary carrier is found and determined, or until the last symbol position of the third K1' time slot is reached.
  • reverse order search refers to search in the order of time domain positions from late to early .
  • Reverse search may be referred to as: reverse search, reverse search, reverse order search, reverse search, reverse search, etc., which is not limited in the embodiments of the present disclosure.
  • the time domain unit for resource search is used as a time slot for exemplary illustration.
  • the time domain unit for resource search may include: sampling point, symbol (symbol), micro A time slot (mini-slot), a time slot (slot), multiple time slots, a subframe (subframe), a radio frame (radio frame) or a frame structure (frame), etc., are not limited in this embodiment of the present disclosure.
  • Step 403 In response to effective resources exist on the candidate secondary carrier, use the candidate secondary carrier as a target secondary carrier, where the target secondary carrier is a switched secondary carrier in a carrier switching scenario of a physical channel.
  • the terminal device will also perform the following step: performing transmission on a physical channel on effective resources of the target secondary carrier.
  • the physical channel is PUCCH
  • the terminal device performs carrier switching, switches to a target secondary carrier, and performs HARQ-ACK feedback on the PUCCH on effective resources of the target secondary carrier.
  • the terminal device selects the candidate secondary carrier based on the selection policy to determine whether it is available. If there are valid resources on the candidate secondary carrier , taking the candidate secondary carrier as the target secondary carrier after carrier switching, so that when the physical channel resources of the primary carrier are unavailable, the carrier switching behavior of the terminal device is clarified, and the terminal device is helped to switch to an available target secondary carrier, thereby The reliability and timeliness of transmission on the physical channel are guaranteed.
  • the terminal device searches for resources on the candidate secondary carrier based on certain rules, determines whether there are valid resources, and then performs carrier switching when there are valid resources to avoid post-switching There is no effective resource on the auxiliary carrier for transmission on the physical channel, so as to ensure the reliability of carrier switching.
  • Fig. 8 is a structural block diagram of a carrier switching device provided by an exemplary embodiment of the present disclosure. As shown in Fig. 8, the device includes: a secondary carrier selection module 801 and a carrier switching module 802;
  • the secondary carrier selection module 801 is configured to determine a candidate secondary carrier based on a selection strategy
  • the carrier switching module 802 is configured to use the candidate secondary carrier as a target secondary carrier in response to effective resources on the candidate secondary carrier, where the target secondary carrier is a switched carrier in a physical channel carrier switching scenario secondary carrier.
  • the selection strategy includes: a first selection strategy
  • the first selection strategy includes: selecting a first secondary carrier with the same SCS as the primary carrier as the candidate secondary carrier.
  • the selection strategy further includes: a second selection strategy
  • the second selection strategy includes: selecting a second secondary carrier using a symmetrical frequency spectrum FDD as the candidate secondary carrier.
  • the selection strategy further includes: a third selection strategy
  • the third selection strategy includes: among the secondary carriers using the asymmetric spectrum TDD, selecting the third secondary carrier as the candidate secondary carrier according to the order of SCS from high to low.
  • the priority of the first selection strategy is higher than the priority of the second selection strategy, and the priority of the second selection strategy is higher than the priority of the third selection strategy.
  • the device further includes: a resource searching module
  • the resource search module is configured to perform resource search based on the position of the K1' time slot, and search for the effective resource on the candidate secondary carrier;
  • the K1' time slot position is a time slot position corresponding to the K1 time slot position of the primary carrier on the candidate secondary carrier.
  • the K1' time slot position in response to the fact that the SCS of the candidate secondary carrier is equal to the SCS of the main carrier, includes a first latest K1' time slot position, and the first latest The K1' time slot position is equal to the K1 time slot position;
  • the resource searching module is configured to search sequentially from the first time slot interval until the effective resource on the candidate secondary carrier is found, or until the first and latest K1' time slot position is reached.
  • the K1' time slot position in response to the SCS of the candidate secondary carrier being greater than the SCS of the main carrier, includes the second earliest K1' time slot position and the second latest K1' time slot position slot position, the value of the second earliest K1' time slot position is equal to the SCS of the candidate secondary carrier/the SCS*(K1-1)+1 of the main carrier, and the second latest K1' time slot The value of the position is equal to the SCS of the candidate secondary carrier/the SCS of the primary carrier/*K1;
  • the resource searching module is configured to sequentially search from the second earliest K1' time slot position until the valid resource on the candidate secondary carrier is found, or until the second latest K1' is reached gap position.
  • the K1' time slot position in response to the SCS of the candidate secondary carrier being smaller than the SCS of the primary carrier, includes a third K1' time slot position, and the third K1' time slot position The value of the position is equal to the upward rounding of (SCS of the candidate secondary carrier/SCS*K1 of the primary carrier);
  • the resource searching module is configured to sequentially search from the first symbol position of the third K1' time slot until the valid resource on the candidate secondary carrier is found and determined, or until the until the last symbol position of the third K1' slot.
  • the device further includes: a transmission module
  • the transmission module is configured to perform transmission on the physical channel on effective resources of the target secondary carrier.
  • the physical channel includes at least any one of the following:
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Downlink Control Channel
  • PDCCH Physical Downlink Control Channel
  • FIG. 9 shows a schematic structural diagram of a terminal device 900 provided by an exemplary embodiment of the present disclosure.
  • the communication device 900 includes: a processor 901 , a receiver 902 , a transmitter 903 , a memory 904 and a bus 905 .
  • the processor 901 includes one or more processing cores, and the processor 901 executes various functional applications and information processing by running software programs and modules.
  • the receiver 902 and the transmitter 903 can be implemented as a communication component, and the communication component can be a communication chip.
  • the memory 904 is connected to the processor 901 through a bus 905 .
  • the memory 904 may be used to store at least one instruction, and the processor 901 is used to execute the at least one instruction, so as to implement various steps in the foregoing method embodiments.
  • volatile or non-volatile storage devices include but not limited to: magnetic disk or optical disk, electrically erasable and programmable Read Only Memory (Erasable Programmable Read Only Memory, EEPROM), Erasable Programmable Read Only Memory (Erasable Programmable Read Only Memory, EPROM), Static Random Access Memory (SRAM), Read Only Memory (Read -Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).
  • An exemplary embodiment of the present disclosure further provides a chip, the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, is used to implement the carrier switching method provided by the above method embodiments.
  • An exemplary embodiment of the present disclosure also provides a computer-readable storage medium, the computer-readable storage medium stores at least one instruction, at least one program, code set or instruction set, the at least one instruction, the At least one segment of program, the code set or instruction set is loaded and executed by the processor to implement the carrier switching method provided by the above method embodiments.

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Abstract

本公开提供了一种载波切换方法、装置、终端设备及可读存储介质，涉及通信领域。该方法应用于终端设备中，该方法包括：基于选择策略，确定候选辅载波；响应于所述候选辅载波上存在有效资源，将所述候选辅载波作为目标辅载波，所述目标辅载波是在物理信道的载波切换场景下，切换后的辅载波。本公开实施例提供的载波切换方法，在主载波的物理信道资源不可用的情况下，明确了终端设备的载波切换行为，帮助终端设备切换至可用的目标辅载波，从而保障了物理信道上的传输的可靠性和及时性。

Description

载波切换方法、装置、终端设备及可读存储介质 技术领域
本公开涉及通信领域，特别涉及一种载波切换方法、装置、终端设备及可读存储介质。
背景技术
R17中的工业物联网(Industrial Internet of Things，IIoT)或超高可靠低时延通信(Ultra Reliable and Low Latency Communication，URLLC)课题下，提出了对混合自动重传请求-应答(Hybrid Automatic Repeat reQuest-Acknowledgement，HARQ-ACK)反馈进行增强。
通常情况下，HARQ-ACK反馈对应的物理上行控制信道(Physical Uplink Control Channel，PUCCH)资源可以通过K1指示获得。如果K1对应的PUCCH资源不可用，或者是丢弃此次反馈操作，或者触发重传，或者根据一定规则进行延迟反馈操作。
但是，上述处理方式对HARQ-ACK反馈的可靠性和延迟会产生一定影响。
发明内容
本公开实施例提供了一种载波切换方法、装置、终端设备及可读存储介质，所述技术方案如下：
根据本公开的一方面，提供了一种载波切换方法，所述方法包括：
基于选择策略，确定候选辅载波；
响应于所述候选辅载波上存在有效资源，将所述候选辅载波作为目标辅载波，所述目标辅载波是在物理信道的载波切换场景下，切换后的辅载波。
另一方面，提供了一种载波切换装置，所述装置包括：辅载波选择模块和载波切换模块；
所述辅载波选择模块，用于基于选择策略，确定候选辅载波；
所述载波切换模块，用于响应于所述候选辅载波上存在有效资源，将所述候选辅载波作为目标辅载波，所述目标辅载波是在物理信道的载波切换场景下， 切换后的辅载波。
另一方面，提供了一种终端设备，该终端设备包括：
处理器；
与处理器相连的收发器；
其中，处理器被配置为加载并执行可执行指令以实现如上述本公开实施例所述的载波切换方法。
另一方面，提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片运行时，用于实现如上述本公开实施例所述的载波切换方法。
另一方面，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至少一条指令、至少一段程序、代码集或指令集，上述至少一条指令、至少一段程序、代码集或指令集由处理器加载并执行以实现如上述本公开实施例所述的载波切换方法。
另一方面，提供了一种计算机程序产品或计算机程序，该计算机程序产品或计算机程序包括计算机指令，该计算机指令存储在计算机可读存储介质中。计算机设备的处理器从计算机可读存储介质读取该计算机指令，处理器执行该计算机指令，使得该计算机设备执行如上述本公开实施例所述的载波切换方法。
本公开实施例提供的技术方案带来的有益效果至少包括：
在物理信道的载波切换场景下，终端设备基于选择策略，选择候选辅载波来判断是否可用，在候选辅载波上存在有效资源的情况下，将该候选辅载波作为载波切换后的目标辅载波，从而在主载波的物理信道资源不可用的情况下，明确了终端设备的载波切换行为，帮助终端设备切换至可用的目标辅载波，从而保障了物理信道上的传输的可靠性和及时性。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1示出了本公开一个示例性实施例提供的载波聚合的示意图；
图2示出了本公开一个示例性实施例提供的通信系统的框图；
图3示出了本公开一个示例性实施例提供的载波切换方法的流程图；
图4示出了本公开另一个示例性实施例提供的载波切换方法的流程图；
图5示出了本公开一个示例性实施例提供的在候选辅载波上进行资源寻找的示意图；
图6示出了本公开另一个示例性实施例提供的在候选辅载波上进行资源寻找的示意图；
图7示出了本公开另一个示例性实施例提供的在候选辅载波上进行资源寻找的示意图；
图8示出了本公开一个示例性实施例提供的载波切换装置的结构框图；
图9示出了本公开一个示例性实施例示出的终端设备的结构框图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。
首先，对本公开实施例涉及到的名词进行简单介绍：
载波聚合：载波聚合(Carrier Aggregation，CA)是将2个或更多的载波单元(Component Carrier，CC)聚合在一起以支持更大的传输带宽。如图1所示，CA技术可以将2～5个载波聚合在一起，实现最大100MHz的传输带宽，有效提高了上下行传输速率。
主小区(Primary Cell，PCell)是终端设备进行初始连接建立的小区，或进行RRC连接重建的小区，或是在小区切换过程中指定的主小区。PCell负责与终端设备之间的无线资源控制(Radio Resource Control，RRC)通信。PCell对应的载波单元称为主载波(Primary Component Carrier，PCC)。
辅小区(Secondary Cell，SCell)是在RRC重配置时添加的，用于提供额外的无线资源，SCell与终端设备之间不存在任何RRC通信。SCell对应的载波单元称为辅载波(Secondary Component Carrier，SCC)。
同一时刻只存在一个主载波，允许存在多个辅载波，比如3个辅载波。网络可以根据需要将暂不使用的辅载波设置为非激活态，降低终端设备的功耗； 也可以快速激活辅载波以满足传输需要。终端设备的主载波不能被去激活；终端设备只能在激活的载波上进行数据传输，在去激活载波上只支持有限度的测量。
K1：下行数据传输与相应HARQ码本反馈的时间关系(Timing between DL data reception and corresponding acknowledgement)。
具体地，若发送端在时间单位n上经由PDSCH向接收端发送下行数据，接收端在时间单位n+K1对应的传输资源上向发送端传输该下行数据对应的上行反馈信息，如，HARQ-ACK反馈。
示例性的，当上述发送端为基站，接收端为终端设备时，基站可以预先配置K1取值集合，比如{1，2，3，4}，并通过RRC信令发送给终端设备。随后向终端设备发送DCI，用于通知终端设备为该数据传输分配的K1具体取值为集合中的哪一个。
图2示出了本公开一个示意性实施例提供的通信系统的框图，该通信系统可以包括：核心网11、接入网12和终端设备13。
核心网11中包括若干个核心网设备110。核心网设备110包括接入和移动管理功能(Access and Mobility Management Function，AMF)，会话管理功能(Session Management Function，SMF)以及用户面管理功能(User Plane Function，UPF)等设备，其中，AMF用于控制终端设备的接入权限以及切换等功能，SMF用于提供服务器连续性、服务器的不间断用户体验，如：IP地址和锚点变化等。
接入网12中包括若干个接入网设备120。接入网设备120可以是基站，基站是一种部署在接入网中用以为终端设备提供无线通信功能的装置。基站可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如在长期演进(Long Term Evolution，LTE)系统中，称为eNodeB或者eNB；在5G新空口(New Radio，NR)系统中，称为gNode B或者gNB。随着通信技术的演进，“基站”这一名称可能描述会变化。为方便本公开实施例中，上述为终端设备提供无线通信功能的装置统称为接入网设备。
终端设备13可以包括各种具有无线通信功能的手持设备、车载设备、可穿 戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的终端(User Equipment，UE)，移动台(Mobile Station，MS)，终端(terminal device)等等。为方便描述，上面提到的设备统称为终端设备。接入网设备120与终端设备13之间通过某种空口技术互相通信，例如Uu接口。基于5G的工业传感器(Industrial sensor)、监控摄像(video surveillance)以及可穿戴类设备等不需要支持这么大的带宽，尤其是工业传感器类，仅需要数兆的传输带宽。此类终端设备在5G后续版本增强中可能被归为一种新的终端类型，并进行相应的技术特性改进。
R17中的IIoT/URLLC课题下，提出了要对HARQ-ACK反馈进行增强，特别是半持续调度(Semi-Persistent Scheduling，SPS)物理下行共享信道(Physical Downlink Shared Channel，PDSCH)传输的HARQ-ACK反馈。通常情况下，HARQ-ACK反馈对应的PUCCH资源可以通过K1指示获得。如果K1对应的PUCCH资源不可用，或者是丢弃此次反馈操作，或者触发重传，或者根据一定规则进行延迟反馈操作，对反馈可靠性和延迟都会产生一定影响。
如果基站支持载波聚合，则在载波聚合场景中，如果主小区的PUCCH资源不可用，可以进行载波切换，将HARQ-ACK反馈切换到辅小区PUCCH上进行，这样做不仅不用在主小区上进行延迟反馈或者触发HARQ-ACK重传，降低了HARQ-ACK反馈时延，保证了HARQ-ACK反馈的可靠性和反馈效率，此外，在一些场景下，载波切换还能降低干扰，实现负载均衡。
相关技术中，尚未对终端设备进行载波切换的行为进行明确。
本公开实施例中，在物理信道的载波切换场景下，终端设备基于选择策略，选择候选辅载波来判断是否可用，在候选辅载波上存在有效资源的情况下，将该候选辅载波作为载波切换后的目标辅载波，从而在主载波的物理信道资源不可用的情况下，明确了终端设备的载波切换行为，帮助终端设备切换至可用的目标辅载波，从而保障了物理信道上的传输的可靠性和及时性。
下面，通过如下实施例对本公开提供的载波切换方法进行示例性的说明。
本公开提供了一种载波切换方法，请参考图3，其示出了本公开一个示例性实施例提供的载波切换方法的流程图，以该方法应用于终端设备中为例，如图3 所示，该方法包括：
步骤301：基于选择策略，确定候选辅载波。
示意性的，在主载波上不存在物理信道的有效资源的情况下，终端设备基于选择策略，在多个辅载波中选择出候选辅载波。
其中，选择策略是用于辅助终端设备在多个辅载波中选择出候选辅载波的策略。选择策略可以称为：切换策略，优先级策略，第一策略，策略等等，本公开实施例对此不加以限制。可选的，选择策略由通信标准进行预定义。
可选的，基于选择策略的定义，每个辅载波对应有切换优先级，终端设备根据切换优先级由高到低的顺序，在多个辅载波中选择候选辅载波。
步骤302：响应于候选辅载波上存在有效资源，将候选辅载波作为目标辅载波，目标辅载波是在物理信道的载波切换场景下，切换后的辅载波。
示意性的，终端设备判断候选辅载波是否可用，在候选辅载波可用的情况下，即候选辅载波上存在有效资源的情况下，终端设备将候选辅载波作为目标辅载波进行载波切换。
其中，有效资源指的是支持进行物理信道上的传输的资源，该资源包括如下资源类型中的至少一种：时域资源、频域资源和码域资源。
可选地，物理信道至少包括如下中的任意一种：
·PUCCH。
也即，本公开实施例示出的载波切换方法适用于PUCCH载波切换。
·物理上行共享信道(Physical Uplink Shared Channel，PUSCH)。
也即，本公开实施例示出的载波切换方法适用于PUSCH载波切换。
·物理下行控制信道PDCCH。
也即，本公开实施例示出的载波切换方法适用于PDCCH载波切换。
·物理下行共享信道(Physical Downlink Shared Channel，PDSCH)。
也即，本公开实施例示出的载波切换方法适用于PDSCH载波切换。
综上所述，本公开实施例提供的载波切换方法，在物理信道的载波切换场景下，终端设备基于选择策略，选择候选辅载波来判断是否可用，在候选辅载波上存在有效资源的情况下，将该候选辅载波作为载波切换后的目标辅载波，从而在主载波的物理信道资源不可用的情况下，明确了终端设备的载波切换行为，帮助终端设备切换至可用的目标辅载波，从而保障了物理信道上的传输的 可靠性和及时性。
可选地，选择策略包括如下策略中的至少一种：
·第一选择策略。
第一选择策略包括：选择与主载波的子载波间隔(SubCarrier Spacing，SCS)相同的第一辅载波作为候选辅载波。
示意性的，主载波的SCS＝15KHz，如果PUCCH发生碰撞不可用，且存在SCS＝15KHz的第一辅载波，则将该第一辅载波作为候选辅载波。其中，该第一辅载波可以是时分双工(Time Division Duplexing，TDD)载波，也可以是频分双工(Frequency Division Duplexing，FDD)载波。
·第二选择策略。
第二选择策略包括：选择使用对称频谱FDD的第二辅载波作为候选辅载波。
其中，FDD指的是上行传输和下行传输使用不同的载波频率，但是可以同时收发的一种双工方式，FDD视为对称频谱。
示意性的，主载波的SCS＝15KHz，如果PUCCH发生碰撞不可用，则将使用对称频谱FDD的第二辅载波作为候选辅载波。
·第三选择策略。
第三选择策略包括：在使用非对称频谱TDD的辅载波中，按照SCS由高到低的顺序进行选择第三辅载波作为候选辅载波。
其中，TDD指的是上行传输和下行传输使用同一个载波频率，仅仅通过时间来区分的一种双工方式，TDD视为非对称频谱。
示意性的，主载波的SCS＝15KHz，如果PUCCH发生碰撞不可用，且，存在SCS＝120KHz，60KHz，30KHz，15KHz的使用非对称频谱TDD的辅载波，则按照SCS由高到低的顺序，依次选择SCS＝120KHz的辅载波，SCS＝60KHz的辅载波，SCS＝30KHz的辅载波，SCS＝15KHz的辅载波作为候选辅载波。
可选的，第一选择策略的优先级大于第二选择策略的优先级，第二选择策略的优先级大于第三选择策略的优先级。
其中，选择策略的优先级用于指示在确定候选辅载波时，考虑不同选择策略的顺序。
也即，第一选择策略的优先级大于第二选择策略的优先级，第二选择策略 的优先级大于第三选择策略的优先级指的是：先考虑第一选择策略来选择候选辅载波，在第一选择策略不存在对应的第一辅载波或者该第一辅载波不可用的情况下，再考虑第二选择策略来选择候选辅载波，在第二选择策略不存在对应的第二辅载波或者该第二辅载波不可用的情况下，再考虑第三选择策略选择候选辅载波。
示意性的，主载波的SCS＝15KHz，如果PUCCH发生碰撞不可用，在存在SCS＝15KHz的第一辅载波的情况下，则将该第一辅载波作为候选辅载波；在不存在SCS＝15KHz的第一辅载波，但存在使用对称频谱FDD的第二辅载波的情况下，则将该第二辅载波作为候选辅载波；在不存在SCS＝15KHz的第一辅载波，也不存在使用对称频谱FDD的第二辅载波，但存在多个使用非对称频谱TDD的第三辅载波的情况下，则按照SCS由高到低的顺序进行选择第三辅载波作为候选辅载波。
综上所述，本公开实施例提供的载波切换方法，在物理信道的载波切换场景下，终端设备基于选择策略，选择候选辅载波来判断是否可用，在候选辅载波上存在有效资源的情况下，将该候选辅载波作为载波切换后的目标辅载波，从而在主载波的物理信道资源不可用的情况下，明确了终端设备的载波切换行为，帮助终端设备切换至可用的目标辅载波，从而保障了物理信道上的传输的可靠性和及时性。
同时，本公开实施例提供的载波切换方法，提供了第一选择策略、第二选择策略、第三选择策略这3种优先级不同的选择策略，帮助终端设备基于如上选择策略，选择出合适的辅载波进行载波切换，提高载波切换的成功率。
在一些实施例中，终端设备在候选辅载波上进行资源寻找，确定是否存在有效资源。图4是本公开一个示例性实施例提供的载波切换方法的流程图，以该方法应用于终端设备为例，如图4所示，该方法包括：
步骤401：基于选择策略，确定候选辅载波。
本步骤的具体实施方式可参见上述步骤301，在此不进行赘述。
步骤402：基于K1’时隙位置进行资源寻找，寻找候选辅载波上的有效资源。
其中，K1’时隙位置是在候选辅载波上，和主载波的K1时隙位置所对应的时隙位置。也即，终端设备基于主载波的K1时隙位置，确定候选辅载波的K1’ 时隙位置，并基于K1’时隙位置进行资源寻找，寻找候选辅载波上的有效资源。
可选的，主载波的K1时隙位置基于网络设备下发的K1指示来确定。
可选的，K1’时隙位置包括至少一个时隙位置。
下面，对步骤402的几种可能的实现方式进行示例性的说明。
第一种可能的实现方式：响应于候选辅载波的SCS等于主载波的SCS，K1’时隙位置包括第一最晚K1’时隙位置，第一最晚K1’时隙位置等于K1时隙位置；终端设备从第一个时隙间隔开始顺序寻找，直至找到候选辅载波上的有效资源，或者，直至达到第一最晚K1’时隙位置为止。
其中，第一个时隙间隔指的是K1＝1时的时隙位置。示意性的，网络设备在时隙0向终端设备发送下行数据，则第一个时隙间隔指的是时隙1。
其中，顺序寻找指的是依照时域位置从早到晚的顺序进行寻找。顺序寻找可以称为：正向寻找，顺向寻找，正向搜索，顺向搜索，顺序搜索等等，本公开实施例对此不加以限制。
也即，在基于第一选择策略选择与主载波的SCS相同的第一辅载波作为候选辅载波的情况下，终端设备可以在候选辅载波上确定一个最晚的时隙位置：第一最晚K1’时隙位置，且第一最晚K1’时隙位置等于K1时隙位置，终端设备从第一个时隙间隔开始顺序寻找，直至找到候选辅载波上的有效资源，或者，直至达到第一最晚K1’时隙位置为止。
示意性的，结合参考图5，Pcell SCS＝Scell SCS＝15KHz，则K1’＝K1＝2，第一最晚K1’时隙位置等于K1时隙位置等于PUCCH时隙2，第一个时隙间隔是K1＝1时的时隙位置：PUCCH时隙1。因此，终端设备从PUCCH时隙1到PUCCH时隙2的顺序进行资源寻找，确定Scell SCS＝15KHz的候选辅载波上是否存在有效资源。
第二种可能的实现方式：响应于候选辅载波的SCS大于主载波的SCS，K1’时隙位置包括第二最早K1’时隙位置和第二最晚K1’时隙位置，第二最早K1’时隙位置的取值等于候选辅载波的SCS/主载波的SCS*(K1-1)+1，第二最晚K1’时隙位置的取值等于候选辅载波的SCS/主载波的SCS/*K1；终端设备从第二最早K1’时隙位置开始顺序寻找，直到找到候选辅载波上的有效资源，或者，直至达到第二最晚K1’时隙位置为止。
其中，顺序寻找指的是依照时域位置从早到晚的顺序进行寻找。顺序寻找 可以称为：正向寻找，顺向寻找，正向搜索，顺向搜索，顺序搜索等等，本公开实施例对此不加以限制。
也即，在基于第二选择策略或第三选择策略选择了SCS大于主载波的SCS的辅载波作为候选辅载波的情况下，终端设备可以在候选辅载波上确定一个最晚的时隙位置：第二最晚K1’时隙位置，和一个最早的时隙位置：第二最早K1’时隙位置，且，第二最早K1’时隙位置的取值等于候选辅载波的SCS/主载波的SCS*(K1-1)+1，第二最晚K1’时隙位置的取值等于候选辅载波的SCS/主载波的SCS/*K1，终端设备从第二最早K1’时隙位置开始顺序寻找，直到找到候选辅载波上的有效资源，或者，直至达到第二最晚K1’时隙位置为止。
示意性的，结合参考图6，Pcell SCS＝15KHz，Scell SCS＝60KHz，K1＝2，记第二最早K1’时隙位置为K1’start，记第二最晚K1’时隙位置为K1’end，K1’start＝(2-1)*4+1＝5，K1’end＝2*4＝8。因此，终端设备从PUCCH时隙5到PUCCH时隙8的顺序进行资源寻找，确定Scell SCS＝60KHz的候选辅载波上是否存在有效资源。
第三种可能的实现方式：响应于候选辅载波的SCS小于主载波的SCS，K1’时隙位置包括第三K1’时隙位置，第三K1’时隙位置的取值等于(候选辅载波的SCS/主载波的SCS*K1)的向上取整；终端设备从第三K1’时隙位置的第一个符号位置开始顺序寻找，直至找到并确定候选辅载波上的有效资源，或者，直至达到第三K1’时隙的最后一个符号位置为止。
其中，顺序寻找指的是依照时域位置从早到晚的顺序进行寻找。顺序寻找可以称为：正向寻找，顺向寻找，正向搜索，顺向搜索，顺序搜索等等，本公开实施例对此不加以限制。
也即，在基于第二选择策略或第三选择策略选择了SCS小于主载波的SCS的辅载波作为候选辅载波的情况下，终端设备可以在候选辅载波上确定一个时隙位置：第三K1’时隙位置，且第三K1’时隙位置等于(候选辅载波的SCS/主载波的SCS*K1)的向上取整值，终端设备从第三K1’时隙位置的第一个符号位置开始顺序寻找，直至找到并确定候选辅载波上的有效资源，或者，直至达到第三K1’时隙的最后一个符号位置为止。
示意性的，结合参考图7，Pcell SCS＝60KHz，Scell SCS＝15KHz，K1＝3,则
Figure PCTCN2021108246-appb-000001
因此，终端设备从PUCCH时隙1的第一个符号位置到最后 一个符号位置的顺序进行资源寻找，确定Scell SCS＝15KHz的候选辅载波上是否存在有效资源。
本公开实施例中，仅以进行资源寻找的方向是顺序寻找进行示例性的说明，进行资源寻找的方向还可以是逆序寻找，逆序寻找指的是依照时域位置从晚到早的顺序进行寻找。逆序寻找可以称为：逆向寻找，反向寻找，逆序搜索，逆向搜索，反向搜索等等，本公开实施例对此不加以限制。
本公开实施例中，仅以进行资源寻找的时域单位为时隙进行示例性的说明，随着通信标准的演进，进行资源寻找的时域单位可以包括：采样点，符号(symbol)，微时隙(mini-slot)，时隙(slot)，多个时隙，子帧(subframe)，无线帧(radio frame)或帧结构(frame)等等，本公开实施例对此不加以限制。
步骤403：响应于候选辅载波上存在有效资源，将候选辅载波作为目标辅载波，目标辅载波是在物理信道的载波切换场景下，切换后的辅载波。
本步骤的具体实施方式可参见上述步骤302，在此不进行赘述。
可选的，在步骤403之后，终端设备还将执行如下步骤：在目标辅载波的有效资源上，进行物理信道上的传输。
示意性的，物理信道为PUCCH，终端设备进行载波切换，切换至目标辅载波，在目标辅载波的有效资源上进行PUCCH上的HARQ-ACK反馈。
综上所述，本公开实施例提供的载波切换方法，在物理信道的载波切换场景下，终端设备基于选择策略，选择候选辅载波来判断是否可用，在候选辅载波上存在有效资源的情况下，将该候选辅载波作为载波切换后的目标辅载波，从而在主载波的物理信道资源不可用的情况下，明确了终端设备的载波切换行为，帮助终端设备切换至可用的目标辅载波，从而保障了物理信道上的传输的可靠性和及时性。
同时，本公开实施例提供的载波切换方法，终端设备基于一定的规则，在候选辅载波上进行资源寻找，确定是否存在有效资源，在存在有效资源的情况下再进行载波切换，避免切换后的辅载波上不存在有效资源进行物理信道上的传输的情况，保障载波切换的可靠性。
需要说明的是，上述方法实施例可以分别单独实施，也可以组合实施，本公开对此不进行限制。
下述为本公开装置实施例，可以用于执行本公开方法实施例。对于本公开装置实施例中未披露的细节，请参照本公开方法实施例。
图8是本公开一个示例性实施例提供的载波切换装置的结构框图，如图8所示，该装置包括：辅载波选择模块801和载波切换模块802；
所述辅载波选择模块801，用于基于选择策略，确定候选辅载波；
所述载波切换模块802，用于响应于所述候选辅载波上存在有效资源，将所述候选辅载波作为目标辅载波，所述目标辅载波是在物理信道的载波切换场景下，切换后的辅载波。
在一个可选的实施例中，所述选择策略包括：第一选择策略；
所述第一选择策略包括：选择与主载波的SCS相同的第一辅载波作为所述候选辅载波。
在一个可选的实施例中，所述选择策略还包括：第二选择策略；
所述第二选择策略包括：选择使用对称频谱FDD的第二辅载波作为所述候选辅载波。
在一个可选的实施例中，所述选择策略还包括：第三选择策略；
所述第三选择策略包括：在使用非对称频谱TDD的辅载波中，按照SCS由高到低的顺序进行选择第三辅载波作为所述候选辅载波。
在一个可选的实施例中，所述第一选择策略的优先级大于所述第二选择策略的优先级，所述第二选择策略的优先级大于所述第三选择策略的优先级。
在一个可选的实施例中，所述装置还包括：资源寻找模块；
所述资源寻找模块，用于基于K1’时隙位置进行资源寻找，寻找所述候选辅载波上的所述有效资源；
其中，所述K1’时隙位置是在所述候选辅载波上，和所述主载波的K1时隙位置所对应的时隙位置。
在一个可选的实施例中，响应于所述候选辅载波的SCS等于所述主载波的SCS，所述K1’时隙位置包括第一最晚K1’时隙位置，所述第一最晚K1’时隙位置等于所述K1时隙位置；
所述资源寻找模块，用于从第一个时隙间隔开始顺序寻找，直至找到所述候选辅载波上的所述有效资源，或者，直至达到所述第一最晚K1’时隙位置为 止。
在一个可选的实施例中，响应于所述候选辅载波的SCS大于所述主载波的SCS，所述K1’时隙位置包括第二最早K1’时隙位置和第二最晚K1’时隙位置，所述第二最早K1’时隙位置的取值等于所述候选辅载波的SCS/所述主载波的SCS*(K1-1)+1，所述第二最晚K1’时隙位置的取值等于所述候选辅载波的SCS/所述主载波的SCS/*K1；
所述资源寻找模块，用于从所述第二最早K1’时隙位置开始顺序寻找，直到找到所述候选辅载波上的所述有效资源，或者，直至达到所述第二最晚K1’时隙位置为止。
在一个可选的实施例中，响应于所述候选辅载波的SCS小于所述主载波的SCS，所述K1’时隙位置包括第三K1’时隙位置，所述第三K1’时隙位置的取值等于(所述候选辅载波的SCS/所述主载波的SCS*K1)的向上取整；
所述资源寻找模块，用于从所述第三K1’时隙位置的第一个符号位置开始顺序寻找，直至找到并确定所述候选辅载波上的所述有效资源，或者，直至达到所述第三K1’时隙的最后一个符号位置为止。
在一个可选的实施例中，所述装置还包括：传输模块；
所述传输模块，用于在所述目标辅载波的有效资源上，进行所述物理信道上的传输。
在一个可选的实施例中，所述物理信道至少包括如下中的任意一种：
PUCCH；PUSCH；PDCCH；PDSCH。
图9示出了本公开一个示例性实施例提供的终端设备900的结构示意图，该通信设备900包括：处理器901、接收器902、发射器903、存储器904和总线905。
处理器901包括一个或者一个以上处理核心，处理器901通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器902和发射器903可以实现为一个通信组件，该通信组件可以是一块通信芯片。
存储器904通过总线905与处理器901相连。
存储器904可用于存储至少一个指令，处理器901用于执行该至少一个指 令，以实现上述方法实施例中的各个步骤。
此外，存储器904可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：磁盘或光盘，电可擦除可编程只读存储器(Erasable Programmable Read Only Memory，EEPROM)，可擦除可编程只读存储器(Erasable Programmable Read Only Memory，EPROM)，静态随时存取存储器(Static Random Access Memory，SRAM)，只读存储器(Read-Only Memory，ROM)，磁存储器，快闪存储器，可编程只读存储器(Programmable Read-Only Memory，PROM)。
本公开一示例性实施例还提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片运行时，用于实现上述各个方法实施例提供的载波切换方法。
本公开一示例性实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或指令集由所述处理器加载并执行以实现上述各个方法实施例提供的载波切换方法。
应当理解的是，在本文中提及的“多个”是指两个或两个以上。“和/或”，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。字符“/”一般表示前后关联对象是一种“或”的关系。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本公开旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。

Claims (25)

  1. 一种载波切换方法，其特征在于，所述方法包括：
    基于选择策略，确定候选辅载波；
    响应于所述候选辅载波上存在有效资源，将所述候选辅载波作为目标辅载波，所述目标辅载波是在物理信道的载波切换场景下，切换后的辅载波。
  2. 根据权利要求1所述的方法，其特征在于，所述选择策略包括：第一选择策略；
    所述第一选择策略包括：选择与主载波的子载波间隔SCS相同的第一辅载波作为所述候选辅载波。
  3. 根据权利要求2所述的方法，其特征在于，所述选择策略还包括：第二选择策略；
    所述第二选择策略包括：选择使用对称频谱的第二辅载波作为所述候选辅载波。
  4. 根据权利要求3所述的方法，其特征在于，所述选择策略还包括：第三选择策略；
    所述第三选择策略包括：在使用非对称频谱的辅载波中，按照SCS由高到低的顺序进行选择第三辅载波作为所述候选辅载波。
  5. 根据权利要求4所述的方法，其特征在于，
    所述第一选择策略的优先级大于所述第二选择策略的优先级，所述第二选择策略的优先级大于所述第三选择策略的优先级。
  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：
    基于K1’时隙位置进行资源寻找，寻找所述候选辅载波上的所述有效资源；
    其中，所述K1’时隙位置是在所述候选辅载波上，和所述主载波的K1时隙位置所对应的时隙位置。
  7. 根据权利要求6所述的方法，其特征在于，响应于所述候选辅载波的SCS等于所述主载波的SCS，所述K1’时隙位置包括第一最晚K1’时隙位置，所述第一最晚K1’时隙位置等于所述K1时隙位置；
    所述基于K1’时隙位置进行资源寻找，寻找所述候选辅载波上的所述有效资源，包括：
    从第一个时隙间隔开始顺序寻找，直至找到所述候选辅载波上的所述有效资源，或者，直至达到所述第一最晚K1’时隙位置为止，所述第一个时间间隔是对应K1等于1时的时隙位置。
  8. 根据权利要求6所述的方法，其特征在于，响应于所述候选辅载波的SCS大于所述主载波的SCS，所述K1’时隙位置包括第二最早K1’时隙位置和第二最晚K1’时隙位置，所述第二最早K1’时隙位置的取值等于所述候选辅载波的SCS/所述主载波的SCS*(K1-1)+1，所述第二最晚K1’时隙位置的取值等于所述候选辅载波的SCS/所述主载波的SCS/*K1；
    所述基于K1’时隙位置进行资源寻找，寻找所述候选辅载波上的所述有效资源，包括：
    从所述第二最早K1’时隙位置开始顺序寻找，直到找到所述候选辅载波上的所述有效资源，或者，直至达到所述第二最晚K1’时隙位置为止。
  9. 根据权利要求6所述的方法，其特征在于，响应于所述候选辅载波的SCS小于所述主载波的SCS，所述K1’时隙位置包括第三K1’时隙位置，所述第三K1’时隙位置的取值等于(所述候选辅载波的SCS/所述主载波的SCS*K1)的向上取整；
    所述基于K1’时隙位置进行资源寻找，寻找所述候选辅载波上的所述有效资源，包括：
    从所述第三K1’时隙位置的第一个符号位置开始顺序寻找，直至找到并确定所述候选辅载波上的所述有效资源，或者，直至达到所述第三K1’时隙的最后一个符号位置为止。
  10. 根据权利要求1至9任一所述的方法，其特征在于，所述方法还包括：
    在所述目标辅载波的有效资源上，进行所述物理信道上的传输。
  11. 根据权利要求1至10任一所述的方法，其特征在于，所述物理信道至少包括如下中的任意一种：
    物理上行控制信道PUCCH；
    物理上行共享信道PUSCH；
    物理下行控制信道PDCCH；
    物理下行共享信道PDSCH。
  12. 一种载波切换装置，其特征在于，所述装置包括：辅载波选择模块和载波切换模块；
    所述辅载波选择模块，用于基于选择策略，确定候选辅载波；
    所述载波切换模块，用于响应于所述候选辅载波上存在有效资源，将所述候选辅载波作为目标辅载波，所述目标辅载波是在物理信道的载波切换场景下，切换后的辅载波。
  13. 根据权利要求12所述的装置，其特征在于，所述选择策略包括：第一选择策略；
    所述第一选择策略包括：选择与主载波的子载波间隔SCS相同的第一辅载波作为所述候选辅载波。
  14. 根据权利要求13所述的装置，其特征在于，所述选择策略还包括：第二选择策略；
    所述第二选择策略包括：选择使用对称频谱的第二辅载波作为所述候选辅载波。
  15. 根据权利要求14所述的装置，其特征在于，所述选择策略还包括：第三选择策略；
    所述第三选择策略包括：在使用非对称频谱的辅载波中，按照SCS由高到低的顺序进行选择第三辅载波作为所述候选辅载波。
  16. 根据权利要求15所述的装置，其特征在于，
    所述第一选择策略的优先级大于所述第二选择策略的优先级，所述第二选择策略的优先级大于所述第三选择策略的优先级。
  17. 根据权利要求12至16任一所述的装置，其特征在于，所述装置还包括：资源寻找模块；
    所述资源寻找模块，用于基于K1’时隙位置进行资源寻找，寻找所述候选辅载波上的所述有效资源；
    其中，所述K1’时隙位置是在所述候选辅载波上，和所述主载波的K1时隙位置所对应的时隙位置。
  18. 根据权利要求17所述的装置，其特征在于，响应于所述候选辅载波的SCS等于所述主载波的SCS，所述K1’时隙位置包括第一最晚K1’时隙位置，所述第一最晚K1’时隙位置等于所述K1时隙位置；
    所述资源寻找模块，用于从第一个时隙间隔开始顺序寻找，直至找到所述候选辅载波上的所述有效资源，或者，直至达到所述第一最晚K1’时隙位置为止，所述第一个时间间隔是K1等于1时的时隙位置。
  19. 根据权利要求17所述的装置，其特征在于，响应于所述候选辅载波的SCS大于所述主载波的SCS，所述K1’时隙位置包括第二最早K1’时隙位置和第二最晚K1’时隙位置，所述第二最早K1’时隙位置的取值等于所述候选辅载波的SCS/所述主载波的SCS*(K1-1)+1，所述第二最晚K1’时隙位置的取值等于所述候选辅载波的SCS/所述主载波的SCS/*K1；
    所述资源寻找模块，用于从所述第二最早K1’时隙位置开始顺序寻找，直到找到所述候选辅载波上的所述有效资源，或者，直至达到所述第二最晚K1’时隙位置为止。
  20. 根据权利要求17所述的装置，其特征在于，响应于所述候选辅载波的SCS小于所述主载波的SCS，所述K1’时隙位置包括第三K1’时隙位置，所 述第三K1’时隙位置的取值等于(所述候选辅载波的SCS/所述主载波的SCS*K1)的向上取整；
    所述资源寻找模块，用于从所述第三K1’时隙位置的第一个符号位置开始顺序寻找，直至找到并确定所述候选辅载波上的所述有效资源，或者，直至达到所述第三K1’时隙的最后一个符号位置为止。
  21. 根据权利要求12至20任一所述的装置，其特征在于，所述装置还包括：传输模块；
    所述传输模块，用于在所述目标辅载波的有效资源上，进行所述物理信道上的传输。
  22. 根据权利要求12至21任一所述的装置，其特征在于，所述物理信道至少包括如下中的任意一种：
    物理上行控制信道PUCCH；
    物理上行共享信道PUSCH；
    物理下行控制信道PDCCH；
    物理下行共享信道PDSCH。
  23. 一种终端设备，其特征在于，所述终端设备包括：
    处理器；
    与所述处理器相连的收发器；
    其中，所述处理器被配置为加载并执行可执行指令以实现如权利要求1至11任一所述的载波切换方法。
  24. 一种芯片，其特征在于，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片运行时，用于实现如权利要求1至11任一所述的载波切换方法。
  25. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或所述指令集由处理器加载并执行以实现如权利 要求1至11任一所述的载波切换方法。
PCT/CN2021/108246 2021-07-23 2021-07-23 载波切换方法、装置、终端设备及可读存储介质 WO2023000329A1 (zh)

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