Cross-carrier scheduling method, terminal equipment, and access network equipment

Abstract

An embodiment of the present application provides a cross-carrier scheduling method, terminal device, and access network device. In this method, when the terminal device monitors the PDCCH for scheduling data of a third cell on at least one USS on a first cell, the terminal device receives first indication information. According to the first indication information, the terminal device stops monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, and determines to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, thereby achieving efficient switching between the USSs on the two cells.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a cross-carrier scheduling method, terminal equipment, and access network equipment. Background Art

[0002] In Rel. 1-15 and Rel. 1-16 of the fifth-generation mobile networks (5G or 5G technology) standards, cross-carrier scheduling refers to one carrier scheduling another. This involves sending a physical downlink control channel (PDCCH) on one carrier to schedule data transmission on the other carrier. For example, the carrier of a primary cell (PCell) schedules the carrier of a secondary cell (SCell), or vice versa. To alleviate the control channel load on the PCell, new technologies are currently being discussed in 5G. For example, the carrier of a secondary cell (SCell) can schedule the carrier of the PCell. However, at any given time, only one of the SCell and PCell cells can have a valid UE-specific search space (USS) for scheduling the PCell. Efficiently switching between the USSs in the bandwidth parts (BWP) of the two cells has become a pressing issue. Summary of the Invention

[0003] The embodiments of the present application provide a cross-carrier scheduling method, a terminal device, and an access network device to achieve efficient switching between USSs on the BWPs of two cells.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions.

[0005] In a first aspect, an embodiment of the present application provides a cross-carrier scheduling method, the method including: a terminal device monitors a PDCCH for scheduling data of a third cell on at least one USS on a first cell, and receives first indication information, the first indication information being used to determine to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or to determine to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, where the third cell is the first cell or the second cell; according to the first indication information, the terminal device stops monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, and determines to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, thereby achieving efficient switching between the USSs on the two cells.

[0006] In combination with the first aspect, in a possible implementation method, the first indication information includes at least one of the following indications: an indication of deactivating the first cell; an indication of BWP switching on the first cell, wherein the BWP to be switched to indicated by the indication of BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the first cell; an indication of configuring the first cell as a dormant cell; an indication of search space set switching on the first cell, wherein the search space set to be switched to indicated by the indication of search space set switching does not have a first USS.

[0007] In combination with the first aspect, in a possible implementation method, the first indication information includes at least one of the following indications: an indication of activating the second cell, wherein the search space set of the activated second cell has a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the first cell; an indication of BWP switching on the second cell, wherein the BWP to be switched to indicated by the indication of BWP switching has the first USS; an indication of configuring the second cell as a non-dormant cell, wherein the search space set of the second cell after non-dormant state has the first USS; an indication of search space set switching on the second cell, wherein the search space set to be switched to indicated by the indication of search space set switching has the first USS.

[0008] In combination with the first aspect, in a possible implementation, the first indication information includes first-type indication information and second-type indication information, the first-type indication information is used to determine the first set of USSs belonging to the first USS on the second cell to monitor the PDCCH for scheduling data of the third cell, and the second-type indication information is used to determine the second set of USSs belonging to the first USS on the second cell to monitor the PDCCH for scheduling data of the third cell.

[0009] In combination with the first aspect, in a possible implementation method, the cross-carrier scheduling method provided by an embodiment of the present application also includes: the terminal device determines, based on the first indication information, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0010] In combination with the first aspect, in a possible implementation method, when the first indication information is carried in RRC signaling or MAC-CE, the terminal device determines, based on the first indication information, the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell. Specifically, the terminal device determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the effective time of deactivation of the first cell; or, the terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell based on the effective time of activation of the second cell.

[0011] In combination with the first aspect, in a possible implementation method, when the first indication information is carried in the downlink control information DCI, the terminal device determines, according to the first indication information, the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell. Specifically, the terminal device determines, according to the DCI and the time specified in the protocol, the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, the terminal device determines, according to the DCI and the search space set switching time, the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, the terminal device determines, according to the DCI and the configured minimum K0, determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, the terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell according to the larger of the configured minimum K0 and the search space group switching time.

[0012] In combination with the first aspect, in a possible implementation method, the terminal device determines, based on the first indication information, a time to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data for the third cell on at least one USS on the second cell. Specifically, the terminal device determines, based on the effective time of the BWP switching on the first cell, a start time to monitor the PDCCH for scheduling data for the third cell on at least one USS on the second cell; wherein, the BWP to be switched to as indicated by the indication of the BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the third cell; or, the terminal device determines, based on the effective time of the BWP switching on the second cell, a time to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first cell; wherein, the BWP to be switched to as indicated by the indication of the BWP switching has a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the third cell.

[0013] In combination with the first aspect, in a possible implementation method, the terminal device determines, based on the first indication information, the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell. Specifically, the terminal device determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the effective time when the first cell is a dormant cell; or, the terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell based on the effective time when the second cell is a non-dormant cell.

[0014] In combination with the first aspect, in a possible implementation method, the terminal device determines, based on the first indication information, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell. Specifically, the terminal device determines, based on the time when the search space set on the first cell is switched, a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell; wherein the indication of the search space set switching indicates that there is no first USS in the search space set to be switched to; or, the terminal device determines, based on the time when the search space set on the second cell is switched, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell; wherein the indication of the search space set switching indicates that there is the first USS in the search space set to be switched to.

[0015] In the embodiments of the present application, for different scenarios, the terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell, thereby ensuring efficient switching between the two cells and reducing the impact on the scheduling of the first cell.

[0016] In a second aspect, an embodiment of the present application provides a cross-carrier scheduling method, the method comprising: an access network device determines to stop sending a PDCCH for scheduling data of a third cell on at least one USS of a first cell, and determines to send a PDCCH for scheduling data of the third cell on at least one first USS on a second cell, where the third cell is the first cell or the second cell; the access network device sends first indication information to a terminal device; wherein the first indication information is used to instruct the terminal device to determine to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS of the first cell, or to determine to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, thereby achieving efficient switching between the USSs on the two cells.

[0017] In combination with the second aspect, in a possible implementation method, the first indication information includes at least one of the following indications: an indication of deactivating the first cell; an indication of BWP switching on the first cell, wherein the BWP to be switched to indicated by the indication of BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the first cell; an indication of configuring the first cell as a dormant cell; an indication of search space set switching on the first cell, wherein the search space set to be switched to indicated by the indication of search space set switching does not have a first USS.

[0018] In combination with the second aspect, in a possible implementation method, the first indication information includes at least one of the following indications: an indication of activating the second cell, wherein the search space set of the activated second cell has a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the first cell; an indication of BWP switching on the second cell, wherein the BWP to be switched to indicated by the indication of BWP switching has the first USS; an indication of configuring the second cell as a non-dormant cell, wherein the search space set of the second cell after non-dormantness has the first USS; an indication of search space set switching on the second cell, wherein the search space set to be switched to indicated by the indication of search space set switching has the first USS.

[0019] In combination with the second aspect, in a possible implementation method, the first indication information includes a first type of indication information and a second type of indication information. The first type of indication information is used to instruct the terminal device to determine to monitor the PDCCH for scheduling data for the third cell on the first set of USSs belonging to the first USS on the second cell, and the second type of indication information is used to instruct the terminal device to determine to monitor the PDCCH for scheduling data for the third cell on the second set of USSs belonging to the first USS on the second cell.

[0020] In combination with the second aspect, in a possible implementation, the cross-carrier scheduling method provided in the present application also includes: the access network device determines, based on the first indication information, a time to stop sending a PDCCH for scheduling data of a third cell on at least one USS on the first cell, or determines a start time for sending a PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0021] In combination with the second aspect, in a possible implementation method, when the first indication information is carried in RRC signaling or MAC-CE, the access network device determines, based on the first indication information, the time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to send the PDCCH for scheduling data of the third cell on at least one USS on the second cell. Specifically, the access network device determines the start time to send the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the effective time of deactivation of the first cell; or, the access network device determines the time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell based on the effective time of activation of the second cell.

[0022] In combination with the second aspect, in a possible implementation manner, when the first indication information is carried in the downlink control information DCI, the access network device determines, according to the first indication information, a time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time for sending the PDCCH for scheduling data of the third cell on at least one USS on the second cell. Specifically, the access network device determines, according to the DCI and the time specified in the protocol, a time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time for sending the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, the access network device determines, according to the DCI and the search space set switching time, a time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time for sending the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, the access network device determines, according to the DCI and the configured minimum K0, determines the time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of sending the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, the access network device determines the time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of sending the PDCCH for scheduling data of the third cell on at least one USS on the second cell according to the larger of the configured minimum K0 and the search space group switching time.

[0023] In combination with the second aspect, in a possible implementation method, the access network device determines, based on the first indication information, a time to stop sending the PDCCH for scheduling data for the third cell on at least one USS on the first cell, or determines a start time to send the PDCCH for scheduling data for the third cell on at least one USS on the second cell. Specifically, the access network device determines, based on the effective time of the BWP switching on the first cell, a start time to send the PDCCH for scheduling data for the third cell on at least one USS on the second cell; wherein, the BWP to be switched to as indicated by the indication of the BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the third cell; or, the access network device determines, based on the effective time of the BWP switching on the second cell, a time to stop sending the PDCCH for scheduling data for the third cell on at least one USS on the first cell; wherein, the BWP to be switched to as indicated by the indication of the BWP switching has a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the third cell.

[0024] In combination with the second aspect, in a possible implementation method, the access network device determines, based on the first indication information, the time to stop sending the PDCCH for scheduling data for the third cell on at least one USS on the first cell, or determines the start time to send the PDCCH for scheduling data for the third cell on at least one USS on the second cell. Specifically, the access network device determines the start time to send the PDCCH for scheduling data for the third cell on at least one USS on the second cell based on the effective time when the first cell is a dormant cell; or, the access network device determines the time to stop sending the PDCCH for scheduling data for the third cell on at least one USS on the first cell based on the effective time when the second cell is a non-dormant cell.

[0025] In combination with the second aspect, in a possible implementation method, the access network device determines, based on the first indication information, the time to stop sending the PDCCH for scheduling data for the third cell on at least one USS on the first cell, or determines the start time of sending the PDCCH for scheduling data for the third cell on at least one USS on the second cell. Specifically, the access network device determines, based on the time of switching the search space set on the first cell, the start time of sending the PDCCH for scheduling data for the third cell on at least one USS on the second cell; wherein the indication of the search space set switching indicates that there is no first USS in the search space set to be switched to; or, the access network device determines, based on the time of switching the search space set on the second cell, the time to stop sending the PDCCH for scheduling data for the third cell on at least one USS on the first cell; wherein the indication of the search space set switching indicates that there is the first USS in the search space set to be switched to.

[0026] In the embodiments of the present application, for different scenarios, the terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell, thereby ensuring efficient switching between the two cells and reducing the impact on the scheduling of the first cell.

[0027] In a third aspect, the present application provides a communication device, comprising: a processor and a storage medium; at least one processor and an interface circuit, the interface circuit being configured to receive signals from a communication device other than the communication device and transmit them to the processor, or to transmit signals from the processor to a communication device other than the communication device, the processor being configured to implement the method described in the first aspect and any possible implementation of the first aspect through logic circuitry or by executing code instructions. The communication device may be a terminal device or a chip within the terminal device.

[0028] In a fourth aspect, the present application provides a communication device comprising: a processor and a storage medium; at least one processor and an interface circuit, the interface circuit being configured to receive signals from a communication device other than the communication device and transmit them to the processor, or to transmit signals from the processor to the communication device other than the communication device, the processor being configured to implement the method described in any possible implementation of the second aspect and the second aspect through logic circuitry or by executing code instructions. The communication device may be an access network device or a chip within the access network device.

[0029] In a fifth aspect, the present application provides a communication system, comprising a first communication device and a second communication device. The first communication device is configured to execute the method described in the first aspect and any possible implementation of the first aspect; and the second communication device is configured to execute the method described in the second aspect and any possible implementation of the second aspect.

[0030] In a sixth aspect, the present application provides a computer-readable storage medium, which stores instructions. When the instructions are executed on a computer, the computer executes the method described in the first aspect and any possible implementation of the first aspect.

[0031] In a seventh aspect, the present application provides a computer-readable storage medium, which stores instructions. When the instructions are executed on a computer, the computer executes the method described in the second aspect and any possible implementation of the second aspect.

[0032] In an eighth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method as described in the first aspect and any possible implementation of the first aspect.

[0033] In a ninth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method as described in the second aspect and any possible implementation of the second aspect.

[0034] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of a technical feature, technical solution or beneficial effect in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the architecture of a mobile communication system used in an embodiment of the present application;

[0036] Figure 2Schematic diagram of the hardware structure of the access network device and terminal device provided in the embodiment of the present application;

[0037] Figure 3 A flowchart of a cross-carrier scheduling method provided in an embodiment of the present application;

[0038] Figure 4 A flowchart of another cross-carrier scheduling method provided in an embodiment of the present application;

[0039] Figure 5 A schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] In the description of this application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more. Words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not limit them to be necessarily different.

[0041] Hereinafter, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0042] The cross-carrier scheduling method provided in the embodiment of the present application is applied to Figure 1 In the mobile communication system 100 shown.

[0043] Figure 1 Schematic diagram of the architecture of the mobile communication system used in the embodiment of the present application. Figure 1 As shown, the mobile communication system 100 includes a core network device 110, an access network device 120 and at least one terminal device (such as Figure 1The terminal device 130 and the terminal device 140 are connected to the access network device 120 wirelessly, and the access network device 120 is connected to the core network device 110 wirelessly or by wire. The core network device 110 and the access network device 120 can be independent and different physical devices, or the functions of the core network device 110 and the logical functions of the access network device 120 can be integrated into the same physical device, or the functions of some core network devices and some access network devices can be integrated into one physical device. The terminal device can be fixed in a fixed location or mobile. Figure 1 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. Figure 1 The embodiments of the present application do not limit the number of core network devices, wireless access network devices, and terminal devices included in the mobile communication system.

[0044] The access network device 120 is an access device that the terminal device uses to access the mobile communication system wirelessly. It can be a base station NodeB, an evolved base station eNodeB, a base station in an NR mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. The embodiments of this application do not limit the specific technology and specific device form adopted by the wireless access network device.

[0045] The terminal device may also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc.

[0046] The access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water; and can also be deployed in the air on aircraft, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of the access network equipment and terminal equipment.

[0047] The embodiments of the present application can be applied to downlink signal transmission, uplink signal transmission, and device-to-device (D2D) signal transmission. For downlink signal transmission, the transmitting device is an access network device, and the corresponding receiving device is a terminal device. For uplink signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is an access network device. For D2D signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is also a terminal device. The transmission direction of the signal in the embodiments of the present application is not limited.

[0048] Access network devices and terminal devices, as well as terminal devices and terminal devices, can communicate through licensed spectrum (licensed spectrum), can also communicate through unlicensed spectrum (unlicensed spectrum), or can communicate through both licensed spectrum and unlicensed spectrum at the same time. Wireless access network devices and terminal devices, as well as terminal devices and terminal devices, can communicate through spectrum of 6 GHz or below, can also communicate through spectrum of 6 GHz or above, or can use spectrum of 6 GHz or below and spectrum of 6 GHz or above at the same time. The embodiments of the present application do not limit the spectrum resources used between access network devices and terminal devices.

[0049] like Figure 2 , which is a schematic diagram of the hardware structure of the access network device and terminal device provided in an embodiment of the present application.

[0050] The terminal device 130 (140) includes at least one processor 301, at least one memory 302, and at least one transceiver 303. Optionally, the terminal device 30 may further include an output device 304 and an input device 305.

[0051] The processor 301, the memory 302 and the transceiver 303 are connected via a bus. The processor 301 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application. The processor 301 may also include multiple CPUs, and the processor 301 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits or processing cores for processing data (such as computer program instructions).

[0052] The memory 302 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this. The memory 302 can be independent and connected to the processor 301 via a bus. The memory 302 can also be integrated with the processor 301. Among them, the memory 302 is used to store the application code that executes the solution of the present application, and the execution is controlled by the processor 301. The processor 301 is used to execute the computer program code stored in the memory 302, thereby implementing the collaborative transmission method described in the embodiment of the present application.

[0053] The transceiver 303 may be any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc. The transceiver 303 includes a transmitter Tx and a receiver Rx.

[0054] Output device 304 communicates with processor 301 and can display information in a variety of ways. For example, output device 304 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Input device 305 communicates with processor 301 and can receive user input in a variety of ways. For example, input device 305 can be a mouse, keyboard, touch screen device, or sensor device.

[0055] The access network device 120 includes at least one processor 201, at least one memory 202, at least one transceiver 203 and at least one network interface 204. The processor 201, the memory 202, the transceiver 203 and the network interface 204 are connected via a bus. Among them, the network interface 204 is used to connect to the core network device through a link (for example, an S1 interface), or to connect to the network interface of other access network devices through a wired or wireless link (for example, an X2 interface) (not shown in the figure), and this embodiment of the present application does not specifically limit this. In addition, the relevant description of the processor 201, the memory 202 and the transceiver 203 can refer to the description of the processor 301, the memory 302 and the transceiver 303 in the terminal device 130, which will not be repeated here.

[0056] In order to make this application clearer, we first briefly introduce some concepts involved in this application.

[0057] 1. K0 and Minimum K0

[0058] The 3G mobile communications partnership project, Rel. 1-16, proposes cross-slot scheduling to save power in terminal devices. For example, the access network device schedules the physical downlink shared channel (PDSCH) to the terminal device via the physical downlink control channel (PDCCH). The time slot offset between the PDCCH and the scheduled PDSCH is K0.

[0059] K0=0 indicates that the PDCCH and the scheduled PDSCH are in the same time slot.

[0060] K0>0 means that the PDCCH and the scheduled PDSCH are not in the same time slot.

[0061] Minimum K0 refers to the minimum available time slot offset of the PDSCH when scheduling across time slots, that is, the minimum available K0 among the time slot offset values ​​between the PDCCH and the scheduled PDSCH.

[0062] It should be noted that if applied to the LTE system, the time slot actually refers to the LTE subframe. If applied to the NR system, the time slot is the NR time slot.

[0063] When downlink data is being transmitted, the access network device schedules the PDSCH to the terminal device via the PDCCH. The terminal device periodically monitors the PDCCH used to schedule the PDSCH. When minimum K0 > 0, the terminal device only needs to monitor the PDCCH and does not need to cache possible PDSCHs in the current timeslot, thereby saving power consumption. If the terminal device detects that the PDCCH has scheduled the PDSCH, it receives the PDSCH in the timeslot with K0 indicated by the PDCCH.

[0064] 2. Bandwidth Part (BWP) and its switching

[0065] 2.1 Basic Concepts of BWP

[0066] The concept of bandwidth part (BWP) is introduced in new radio (NR). A BWP is a continuous frequency resource on a carrier.

[0067] The states of BWP include active state and inactive state. Among them, active state refers to a workable state. BWP in active state means that BWP is in a workable state, which can also be described as "activated BWP". For example, BWP can send or receive signals. Inactive state is a concept corresponding to active state, which refers to a non-workable state. BWP in inactive state means that BWP is in a non-workable state, which can also be described as "inactive BWP" or "deactivated BWP". The process of converting BWP from inactive state to active state, or the process of converting non-workable BWP to workable BWP, is activating BWP. Correspondingly, the process of converting BWP from active state to inactive state, or the process of converting workable BWP to non-workable BWP, is deactivating BWP, which can also be described as deactivating BWP.

[0068] BWP can be divided into downlink BWP and uplink BWP. The access network device can configure multiple DL BWPs and multiple UL BWPs for the terminal device, and activate at least one DL BWP and at least one UL BWP. The terminal device receives the downlink transmission sent by the access network device on the activated DLBWP (i.e., active DL BWP). The terminal device sends uplink transmission on the activated ULBWP. The uplink transmission includes but is not limited to: the transmission of uplink control signaling, the transmission of uplink data and the transmission of uplink reference signals. The uplink control signaling includes: correct acknowledgement (ACK) / negative acknowledgement (SR), scheduling request (SR), channel state information (CSI). The uplink reference signal includes: demodulation reference signal (DMRS), phase tracking reference signal (PTRS) and sounding reference signal (SRS).

[0069] 2.2. BWP Switching

[0070] To enable terminal devices to receive or send data on different BWPs at different times according to service needs, NR supports triggering terminal devices to switch BWPs using the DCI of the scheduling data.

[0071] BWP switching (switch) is used to switch the activated BWP. In the existing standard, when a terminal device works on a cell, there is only one activated downlink BWP (downlink BWP, DL BWP) and one activated uplink BWP (uplink BWP, UL BWP). However, the activated BWP can change, which is called "BWP switching". For example, the access network device configures two DL BWPs for the terminal device, namely DL BWP1 and DL BWP2. The downlink scheduling DCI format 1_1 or DCI format 1_2 can carry the BWP switching indication. The access network device can send a downlink scheduling DCI format1_1 or DCIformat 1_2 to the terminal device. The scheduling DCI is carried on the physical downlink control channel PDCCH and transmitted through the PDCCH. The terminal device receives the scheduling DCI and switches to the DL BWP indicated by the scheduling DCI to receive or send data.

[0072] It takes a certain processing delay for the terminal device to switch from one BWP to another. This processing delay is called T BWPswitchDelay . This value is defined as:

[0073] If the terminal device receives the scheduling DCI for switching BWP in time slot n, then the terminal device should BWPswitchDelay The time slot has the ability to send PUSCH or receive PDSCH on the switched BWP. Depending on the capabilities of the terminal device, NR defines two different processing delay types, as shown in Table 1.

[0074] Table 1

[0075]

[0076] Among them, μ is the subcarrier spacing parameter of the current terminal equipment, that is, the subcarrier spacing of the terminal equipment is 2 μ 15kHz. The terminal device (such as UE) can report to the access network device (such as gNB) whether the supported BWP switching capability is type 1 or type 2.

[0077] 3. Search Space

[0078] 3.1 Basic Concepts of Search Space

[0079] In NR, the PDCCH can contain L = {1, 2, 4, 8, 16} control channel elements (CCEs). L is called the PDCCH aggregation level (AL). A CCE contains six resource element groups (REGs), each of which corresponds to an RB on an OFDM symbol.

[0080] A PDCCH candidate may include L = {1, 2, 4, 8, 16} control channel elements, which may or may not transmit a PDCCH of a terminal device. A terminal device may detect a PDCCH candidate to determine whether its own PDCCH exists.

[0081] The access network device configures one or more search spaces (or search space sets, which can be uniformly referred to as search spaces) for the terminal device. The search space contains multiple PDCCH candidates. A PDCCH candidate may carry one PDCCH. The terminal device blindly detects the PDCCH on the PDCCH candidate.

[0082] 3.2 Search Space Configuration

[0083] The search space is configured as follows:

[0084] searchSpaceId: the identifier of the search space;

[0085] controlResourceSetId: The identifier of the CORESET associated with the search space, which can be used to determine the time-frequency position of the search space;

[0086] monitoringSlotPeriodicityAndOffset: The period and offset of the search space, which can be used to determine the time domain position of the search space;

[0087] nrofCandidates: the number of PDCCH candidates for each AL;

[0088] searchSpaceType: indicates the search space type. There are two types of search space sets: Common Search Space (CSS) and UE-specific Search Space (USS).

[0089] 3.3 Search Space Configuration for Cross-Carrier Scheduling

[0090] The search space configurations for cross-carrier scheduling supported in NR are:

[0091] nrofCandidates indicates the number of AL and PDCCH candidates in the associated scheduled carrier.

[0092] searchSpaceId indicates the identifier of the search space (in cross-carrier scheduling, the search spaces with the same searchSpaceId in the scheduling cell and the scheduled cell are associated with each other).

[0093] 3.4 Search Space Group Switching

[0094] On a serving cell, the high-level parameter searchSpaceGroupIdList-r16 can configure a search space group identifier for a terminal device. Each search space group identifier corresponds to a group of Type3-PDCCH CSS sets or USSs (other CSS sets are always monitored).

[0095] The high-level parameter searchSpaceSwitchingDelay-r16 can configure the switching capability P for a terminal device.switch , the P switch The minimum value is shown in Table 2. In the current protocol, the minimum value of the high-level parameter searchSpaceGroupIdList-r16 is 10 and the maximum value is 52. Terminal devices can report their supported switching capability 1 or switching capability 2. If not reported, the default is capability 1.

[0096] Table 2

[0097] μ Switching capability 1 [symbol] Switching capability 2 [symbol] 0 25 10 1 25 12 2 25 22

[0098] Among them, μ is the subcarrier spacing parameter of the current terminal equipment, that is, the subcarrier spacing of the terminal equipment is 2 μ 15kHz. The high-level parameter searchSpaceSwitchingTimer-r16 configures a timer value for a terminal device. The timer value is decremented by 1 for each slot corresponding to the reference SCSμ. When the timer reaches 0, the terminal device begins monitoring the PDCCH in the default set of search spaces.

[0099] If the terminal device is configured with or not configured with the high-level parameter SearchSpaceSwitchTrigger-r16, the terminal device may switch to monitor the PDCCH on the search space set in the following manner:

[0100] First, if a terminal device is configured with the location of the search space set group switching indication field in DCI format 2_0 by the higher-layer parameter SearchSpaceSwitchTrigger-r16, DCI format 2_0 can indicate the switching of the search space set group as follows:

[0101] If the value of the search space set group switching indication field in DCI format 2_0 is 0, then on the serving cell, in the first time slot after the time slot to which the symbol of the PDCCH carrying the DCI format 2_0 and the symbol of the switching capability Pswitch belong, the terminal device starts monitoring the PDCCH on the search space set group whose identifier is 0, and stops monitoring the PDCCH on the search space set group whose identifier is 1.

[0102] If the value of the search space set switching indication field in DCI format 2_0 is 1, then on this serving cell, in the first time slot after the time slot to which the PDCCH symbol carrying DCI format 2_0 and the symbol of switching capability Pswitch belongs, the terminal device starts monitoring the PDCCH on the search space set group identified as 1 and stops monitoring the PDCCH on the search space set group identified as 0. In addition, the terminal device sets the timer value to searchSpaceSwitchingTimer-r16.

[0103] On a serving cell, the terminal device is monitoring the PDCCH on the search space group identified as 1. If the timer times out on a slot, the PDCCH will be reset after the slot. switch In the first slot after the time slot to which the symbol belongs, the terminal device starts monitoring the PDCCH on the search space set group whose identifier is 0 of the search space group, and stops monitoring the PDCCH on the search space set group whose identifier is 1 of the search space group.

[0104] Second, if a terminal device is not configured with the high-level parameter earchSpaceSwitchTrigger-r16 for a serving cell, the switching of the search space set group is as follows:

[0105] If the terminal device detects PDCCH on the search space group with the search space group identifier of 0, then on this serving cell, the symbol of the PDCCH carrying the DCI format is consistent with the switching capability P switch In the first slot after the time slot to which the symbol belongs, the terminal device starts monitoring the PDCCH on the search space set group whose identifier is 1, and stops monitoring the PDCCH on the search space set group whose identifier is 0.

[0106] On a serving cell, the terminal device is monitoring the PDCCH on the search space group identified as 1. If the timer times out on a slot, the PDCCH will be reset after the slot. switch In the first slot after the time slot to which the symbol belongs, the terminal device starts monitoring the PDCCH on the search space set group whose identifier is 0 of the search space group, and stops monitoring the PDCCH on the search space set group whose identifier is 1 of the search space group.

[0107] 4. Carrier aggregation and secondary carrier activation / deactivation

[0108] 4.1 Dual Link and Carrier Aggregation

[0109] In dual connectivity (DC), a terminal device establishes connections with multiple cells, which are divided into two groups: a master cell group (MCG) and a secondary cell group (SCG). If dual connectivity is not used, the group of cells communicating with the terminal device is the MCG.

[0110] Multiple cells in an MCG are combined using carrier aggregation (CA) technology. Multiple cells in an SCG are combined using carrier aggregation (CA) technology.

[0111] The primary cell in the MCG is the primary cell (PCell), the primary cell in the SCG is the primary secondary cell (PSCell), and other cells in the MCG and SCG are secondary cells (SCell).

[0112] 4.2 Carrier Activation and Deactivation

[0113] 4.2.1 SCell Activation / Deactivation Status

[0114] 1) An activated SCell includes the following series of actions:

[0115] The terminal device sends a sounding reference signal (SRS) to the access network device;

[0116] The terminal device reports the channel state information (CSI) of this SCell;

[0117] The terminal device detects the PDCCH used for and transmitted on the SCell;

[0118] If the access network device configures the terminal device to transmit the PUCCH on the carrier, the access network device sends the PUCCH to the terminal device.

[0119] The terminal device starts or restarts the sCellDeactivationTimer (SCell deactivation timer), triggering the terminal device to report the PHR;

[0120] 2) When the MAC entity of the terminal device receives a deactivation command for an SCell or the sCellDeactivationTimer of this SCell times out, it deactivates this SCell, stops the sCellDeactivationTimer of this SCell, or flushes (clears) all HARQ buffers (hybrid automatic repeat request buffers) on this SCell.

[0121] 3) If an SCell is deactivated, the terminal device does not send SRS in the corresponding SCell, does not report the CSI of the SCell, does not transmit uplink data, does not detect the PDCCH used for and transmitted on the SCell, and does not send PUCCH.

[0122] 4.2.2 SCell Activation / Deactivation Indication

[0123] The access network device sends an Activation / Deactivation MAC CE to the terminal device. The terminal device determines the activation and deactivation status of the SCell based on the information in the MAC CE.

[0124] For the activated SCell determined by the MAC CE, the terminal device can also deactivate the SCell according to a timer.

[0125] The terminal device maintains a deactivation timer, sCellDeactivationTimer, for each SCell. The value of sCellDeactivationTimer is the same for all SCells on a particular terminal device. Furthermore, this value can be configured to "infinity," disabling timer-based SCell deactivation. In this case, the terminal device cannot control SCell deactivation.

[0126] For an SCell, if the terminal device does not receive data or PDCCH messages on the SCell within the time specified by the deactivation timer, the SCell will be deactivated. This is also the only case in which the terminal device can automatically deactivate an SCell.

[0127] 4.2.3 Activation / deactivation effective time

[0128] If a PDSCH carrying an SCell activation command ending in slot n is received, the terminal device shall activate the SCell at the earliest in slot n+k and at the latest within the minimum requirements defined in TS38.133.

[0129] Among them, the value of k is Where k1 refers to the transmission slot number of the PUCCH carrying the HARQ-ACK information of the received PDSCH, which is indicated by the PDSCH-to-HARQ-timing-indicator field in the DCI that schedules the PDSCH. It is the number of slots used in each subframe under the SCS configuration μ of PUCCH.

[0130] If the sCellDeactivationTimer associated with this SCell times out in slot n, the terminal device shall deactivate the SCell within the minimum requirements defined in TS38.133 at the latest.

[0131] In summary, when an SCell is activated, the terminal device starts detecting the PDCCH used for and transmitted on the SCell at the earliest in slot n+kl and at the latest at the minimum requirement defined in TS38.133; when an SCell is deactivated, the terminal device stops detecting the PDCCH used for and transmitted on the SCell at the earliest in slot n and at the latest at the minimum requirement defined in TS38.133.

[0132] 5. Carrier sleep

[0133] 5.1、Carrier sleep / non-sleep indication

[0134] 3GPP Rel-16 introduced the carrier dormancy mechanism for SCells. Switching between dormancy and non-dormancy behavior of an SCell is achieved through BWP switching. When an SCell is indicated as dormancy, the terminal device on that SCell switches from the currently active downlink BWP to the dormant BWP. On the dormant BWP, the terminal device does not need to perform PDCCH detection. Alternatively, if the SCell is the scheduled carrier in cross-carrier scheduling, the terminal device does not need to detect the PDCCH scheduling the SCell on the corresponding scheduling carrier.

[0135] The switching between dormancy and non-dormancy of SCell is indicated by DCI in the following ways:

[0136] Method 1: The SCell dormancy indication (secondary carrier sleep indication) field in DCI format 0_1 ​​or 1_1 indicates whether the SCell is dormancy or non-dormancy. DCI can schedule data at the same time. The network configures up to 5 SCell groups through the parameter SCell-groups-for-dormancy-within-active-time. The SCell dormancy indication has a maximum of 5 bits, each bit corresponding to one SCell group. When the bit indicates '0', the BWP on each activated SCell in the corresponding SCell group is switched to the dormant BWP. When the bit indicates '1', if the terminal device is in a non-dormant BWP on each activated SCell in the corresponding SCell group, the terminal device continues to operate on the non-dormant BWP. If the terminal device is in a dormant BWP, the terminal device switches to the first non-dormant BWP.

[0137] Method 2: A specific field in DCI format 1_1 indicates whether an SCell is dormancy or non-dormancy. DCI cannot schedule data at the same time. In this indication method, each bit corresponds to one SCell, indicating whether each SCell is dormancy or non-dormancy.

[0138] Method 3: The SCell dormancy indication field in DCI format 2_6 indicates whether the SCell is dormancy or non-dormancy. This indication method is similar to method 1, except that DCI format 2_6 is a group-common DCI that can be sent to multiple terminal devices without data scheduling.

[0139] 5.2 Carrier sleep time

[0140] Because the switching between dormancy and non-dormancy (non-sleep) of the SCell is a BWP switching, the switching effective time between dormancy and non-dormancy is the same as the BWP switching effective time.

[0141] The above is a brief introduction to some concepts involved in the embodiments of this application.

[0142] Currently, in Rel. 1-16 of the 5G technical standard, cross-carrier scheduling means one carrier schedules another. For example, the carrier of the primary cell (PCell) schedules the carrier of a secondary cell (SCell), or vice versa. To alleviate the control channel load on the primary cell (PCell), the carrier of the secondary cell (SCell) can schedule the carrier of the primary cell (PCell).

[0143] For simplicity, only one cell in the SCell and PCell may have a valid USS for scheduling the PCell. The control channel load on the PCell and SCell varies over time. At one moment, the control channel load on the PCell may be higher than that on the SCell, while at the next moment, the control channel load on the SCell may be higher than that on the PCell. Based on the changes in the control channel load on the PCell and SCell, the cell with the lower load can be selected for control channel transmission. Therefore, how to efficiently switch between USSs on the bandwidth parts (BWP) of the two cells has become a pressing issue.

[0144] In order to achieve efficient switching between USSs on the BWP of two cells, an embodiment of the present application provides a cross-carrier scheduling method, in which a terminal device receives first indication information when monitoring a PDCCH for scheduling data of a third cell on at least one USS on a first cell. The terminal device stops monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell according to the first indication information, and determines to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0145] The methods in the following embodiments can all be applied to a device having the above hardware structure (such as Figure 1 It is implemented in the terminal device 130 and the terminal device 140).

[0146] Figure 3 A flow chart of a cross-carrier scheduling method provided in an embodiment of the present application. Figure 3 As shown, the method may include:

[0147] S301a: The access network device determines to stop sending the PDCCH for scheduling data of the third cell in at least one USS of the first cell, and determines to send the PDCCH for scheduling data of the third cell in at least one USS of the second cell.

[0148] A cell is a logical area that provides services to users. Each cell corresponds to a carrier.

[0149] The first cell may be a primary cell (PCell), and the second cell may be a secondary cell (SCell). Alternatively, the first cell may be a secondary cell (SCell), and the second cell may be a primary cell (PCell). Alternatively, the first cell may be a secondary cell (SCell), and the second cell may be another secondary cell (SCell).

[0150] The indication content of the first indication information is different depending on the type of the first cell.

[0151] For example, if the first cell is a PCell, the first indication information for the first cell includes an indication of BWP switching or an indication of search space set switching. If the first cell is an SCell, the first indication information for the first cell may include one or more of an indication of SCell activation / deactivation, an indication of BWP switching, an indication of search space set switching, an indication of a dormant cell, and an indication of a non-dormant cell. Of course, the first indication information may also include other indications, which are not listed here.

[0152] Since at least one USS including a PDCCH candidate for a PDCCH that can carry data for scheduling the first cell can be configured on the configuration BWP of the primary cell (PCell), at least one USS including a PDCCH candidate for a PDCCH that can carry data for scheduling the first cell can also be configured on the configuration BWP of the secondary cell (SCell). However, only one of the primary cell (PCell) and the secondary cell (SCell) has a USS including a PDCCH candidate for a PDCCH that can carry data for scheduling the first cell in an active state.

[0153] Therefore, S301a specifically involves the access network device determining, based on the first indication information, to send a PDCCH for scheduling data of the third cell in at least one USS of the PCell, and determining to stop sending a PDCCH for scheduling data of the third cell in at least one USS of the SCell.

[0154] Of course, the access network device may also determine, based on the first indication information, to send a PDCCH for scheduling data for the third cell in at least one USS of the SCell, and determine to stop sending a PDCCH for scheduling data for the third cell in at least one USS of the PCell.

[0155] S302b. The access network device sends first indication information to the terminal device.

[0156] S302a: The terminal device monitors, on at least one USS on the first cell, a PDCCH for scheduling data of the third cell.

[0157] S302c. The terminal device receives the first indication information.

[0158] It should be noted that the terminal device is in a state of monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first cell and receives the first indication information. In other words, before the terminal device receives the first indication information, the terminal device executes S302a. Alternatively, when the terminal device receives the first indication information, the terminal device executes S302a. This is not specifically limited in the embodiments of the present application.

[0159] As described above, the first cell may be a primary cell (PCell), and the second cell may be a secondary cell (SCell). Alternatively, the first cell may be a secondary cell (SCell), and the second cell may be a primary cell (PCell). Alternatively, the first cell may be a secondary cell (SCell), and the second cell may be another secondary cell (SCell).

[0160] The first indication information is used to determine to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS of the first cell, or to determine to monitor the PDCCH for scheduling data of the third cell on at least one USS of the second cell.

[0161] However, the content of the first indication information varies depending on the type of the first cell, including the following situations:

[0162] The first type: the first cell is the secondary cell (SCell), and the second cell is the primary cell (PCell).

[0163] The first indication information includes at least one of the following indications:

[0164] Instruction to deactivate SCell;

[0165] An indication of BWP switching on the SCell, wherein the BWP to be switched to indicated by the indication of BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling a third cell;

[0166] An indication for configuring an SCell as a dormant cell;

[0167] An indication of search space set switching on the SCell, wherein the indication of search space set switching indicates that the search space set to be switched to does not have a first USS.

[0168] The second type: the first cell is the secondary cell (SCell) and the second cell is the primary cell (PCell).

[0169] The first indication information includes at least one of the following indications:

[0170] An indication of BWP switching on the PCell, wherein the BWP to be switched to by the indication of the BWP switching has a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling a third cell;

[0171] An indication of search space set switching on the PCell, wherein the indication of search space set switching indicates that the search space set to be switched to includes the first USS.

[0172] The third type: the first cell is the primary cell PCell, and the second cell is the secondary cell SCell

[0173] The first indication information includes at least one of the following indications:

[0174] Instruction to activate SCell;

[0175] An indication of BWP switching on the SCell, wherein the BWP to be switched to by the indication of BWP switching has a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling a third cell;

[0176] An indication for configuring an SCell as a non-dormant cell;

[0177] An indication of search space set switching on the SCell, wherein the indication of search space set switching indicates that the search space set to be switched to includes the first USS.

[0178] The fourth type: the first cell is the primary cell PCell and the second cell is the secondary cell SCell

[0179] The first indication information includes at least one of the following indications:

[0180] An indication of BWP switching on the PCell, wherein the BWP to be switched to indicated by the indication of BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling a third cell;

[0181] An indication of search space set switching on the PCell, wherein the indication of search space set switching indicates that the search space set to be switched to does not have a first USS.

[0182] The fifth type: the first cell is the first secondary cell SCell, and the second cell is the second secondary cell SCell

[0183] The first indication information includes at least one of the following indications:

[0184] Instruction to activate the second SCell;

[0185] An indication of BWP switching on the second SCell, wherein the BWP to be switched to by the indication of BWP switching has a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling a third cell;

[0186] An indication for configuring the second SCell as a non-dormant cell;

[0187] An indication of search space set switching on the second SCell, wherein the indication of search space set switching indicates that the search space set to be switched to includes the first USS.

[0188] Category 6: The first cell is the first secondary cell SCell, and the second cell is the second secondary cell SCell

[0189] Instruction to activate the first SCell;

[0190] An indication of BWP switching on the first SCell, wherein the BWP to be switched to indicated by the indication of BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling a third cell;

[0191] An indication for configuring the first SCell as a dormant cell;

[0192] An indication of search space set switching on the first SCell, wherein the indication of search space set switching indicates that the search space set to be switched to does not include the first USS.

[0193] S303a. The terminal device stops monitoring the PDCCH for scheduling data of the third cell on at least one USS of the first cell according to the first indication information, or determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS of the second cell.

[0194] In a specific implementation, the following scenarios are described for different types of the first cell and different contents of the indication included in the first indication information:

[0195] Scenario a1: The first cell is a secondary cell (SCell), the second cell is a primary cell (PCell), the third cell is a primary cell (PCell) or a secondary cell (SCell), and the first indication information includes an indication to deactivate the SCell.

[0196] The terminal device deactivates the SCell according to the instruction of the deactivated SCell, or stops the deactivation timer sCellDeactivationTimer of the SCell, or refreshes or clears all hybrid automatic repeat request buffers HARQ buffers on the SCell. At this time, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the PCell.

[0197] Scenario a2: The first cell is a secondary cell (SCell), the second cell is a primary cell (PCell), and the third cell is a primary cell (PCell) or a secondary cell (SCell). The first indication information is carried in the DCI, and the first indication information includes an indication of BWP switching on the SCell.

[0198] The terminal device switches the BWP to be switched to according to the BWP switching instruction on the SCell. There is no first USS on the BWP to be switched to, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the PCell.

[0199] Scenario a3: The first cell is a secondary cell (SCell), the second cell is a primary cell (PCell), and the third cell is a primary cell (PCell) or a secondary cell (SCell). The first indication information is carried in the DCI, and the first indication information includes an indication that the SCell is configured as a dormant cell.

[0200] The terminal device indicates that the SCell is a dormant cell according to the secondary carrier dormancy indication SCell dormancy indication field in DCI format 0_1 ​​or 1_1, and the BWP activated on the SCell switches to the dormant BWP. There is no first USS on the dormant BWP, and the first USS is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the PCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0201] Alternatively, the access network device configures up to 5 SCell groups through the parameter SCell-groups-for-dormancy-within-active-time. The SCell dormancy indication has a maximum of 5 bits, and each bit corresponds to one of the SCell groups. The terminal device switches the BWP on each activated SCell in the corresponding SCell group to a dormant BWP based on the bit indication of '0'. There is no first USS on the dormant BWP. The first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the PCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0202] Alternatively, the terminal device indicates that the SCell is a dormant cell according to a specific field in DCI format 1_1, and the BWP activated on the SCell switches to a dormant BWP. There is no first USS on the dormant BWP, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the PCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0203] Alternatively, the terminal device indicates that the SCell is a dormant cell according to the secondary carrier dormancy indication SCell dormancy indication field in DCI format 2_6, and the BWP activated on the SCell switches to the dormant BWP. There is no first USS on the dormant BWP, and the first USS is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the PCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0204] Scenario a4: The first cell is a secondary cell (SCell), the second cell is a primary cell (PCell), and the third cell is a primary cell (PCell) or a secondary cell (SCell). The first indication information is carried in the DCI, and the first indication information includes an indication of the search space set switching on the SCell.

[0205] The terminal device receives a DCI format 2_0 indicating that a search space set switching occurs on the SCell, wherein the search space set to be switched to by the search space set indicated by the search space set switching instruction includes the first USS, and the symbol of the PDCCH carrying the DCI format 2_0 is consistent with the switching capability P switch In the first time slot after the time slot to which the symbol belongs, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the PCell, and stops monitoring the PDCCH for scheduling data of the third cell on at least one USS on the SCell.

[0206] Alternatively, the terminal device monitors the PDCCH for scheduling data for the third cell on at least one first USS on the SCell, and the timer expires on the current time slot. In the first time slot after the time slot to which the symbol of the PDCCH after the current time slot belongs, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the PCell, and stops monitoring the PDCCH for scheduling data for the third cell on at least one USS of the SCell.

[0207] Alternatively, the terminal device monitors the PDCCH that schedules the data of the third cell on the USS with the identifier 1 of the search space group, and on the SCell, the symbol of the PDCCH carrying the DCI format is consistent with the switching capability P switch In the first time slot after the time slot to which the symbol belongs, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the PCell, and stops monitoring the PDCCH for scheduling data of the third cell on at least one USS on the SCell.

[0208] Scenario a5: The first cell is a secondary cell (SCell), the second cell is a primary cell (PCell), the third cell is a primary cell (PCell) or a secondary cell (SCell), and the first indication information includes an indication of BWP switching on the PCell.

[0209] The terminal device switches the BWP to be switched to according to the BWP switching instruction on the PCell. There is a first USS on the BWP to be switched to, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS in the PCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one first USS in the SCell.

[0210] Scenario a6: The first cell is a secondary cell (SCell), the second cell is a primary cell (PCell), the third cell is a primary cell (PCell) or a secondary cell (SCell), and the first indication information includes an indication of a search space set switching on the PCell.

[0211] The terminal device switches the BWP to be switched to according to the indication of the search space set switching on the PCell. There is a first USS on the BWP to be switched to, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS in the PCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one first USS in the SCell.

[0212] Scenario b1: The first cell is the primary cell (PCell), the second cell is the secondary cell (SCell), the third cell is the primary cell (PCell) or the secondary cell (SCell), and the first indication information includes an indication to activate the SCell.

[0213] The terminal device activates the SCell according to the indication of activating the SCell. At this time, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the SCell, and determines to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS of the PCell.

[0214] Scenario b2: The first cell is the primary cell PCell, the second cell is the secondary cell SCell, the third cell is the primary cell PCell or the secondary cell SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of BWP switching on the SCell

[0215] The terminal device switches the BWP to be switched to according to the BWP switching instruction on the SCell. There is a first USS on the BWP to be switched to, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the PCell.

[0216] Scenario b3: The first cell is the primary cell PCell, the second cell is the secondary cell SCell, the third cell is the primary cell PCell or the secondary cell SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of configuring the SCell as a non-dormant cell

[0217] The terminal device indicates that the SCell is a non-dormancy cell according to the secondary carrier dormancy indication SCell dormancy indication field in DCI format 0_1 ​​or 1_1, and switches the dormant BWP on the SCell to a non-dormancy BWP. There is a first USS on the non-dormancy BWP, which is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the SCell.

[0218] Alternatively, the access network device configures up to 5 SCell groups through the parameter SCell-groups-for-dormancy-within-active-time. The SCell dormancy indication has a maximum of 5 bits, and each bit corresponds to one of the SCell groups. The terminal device indicates '1' based on this bit, and the dormancy BWP on each SCell in the corresponding SCell group is switched to a non-dormancy BWP. There is a first USS on the non-dormancy BWP, and the first USS is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the SCell.

[0219] Alternatively, the terminal device indicates that the SCell is a non-dormant cell according to a specific field in DCI format 1_1, and the dormancy BWP on the SCell switches to a non-dormancy BWP. There is no first USS on the non-dormancy BWP, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the SCell.

[0220] Alternatively, the terminal device indicates that the SCell is a non-dormancy cell according to the secondary carrier dormancy indication SCell dormancy indication field in DCI format 2_6, and the dormancy BWP on the SCell is switched to a non-dormancy BWP. There is no first USS on the non-dormancy BWP, and the first USS is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the SCell.

[0221] Scenario b4: The first cell is the primary cell PCell, the second cell is the secondary cell SCell, the third cell is the primary cell PCell or the secondary cell SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of the search space set switching on the SCell

[0222] The terminal device receives a DCI format 2_0 indicating that a search space set switch occurs on the PCell, wherein the search space set to be switched to by the search space set switching indication does not have the first USS, and the symbol of the PDCCH carrying the DCI format 2_0 is consistent with the switching capability P switch In the first time slot after the time slot to which the symbol belongs, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the SCell, and determines to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the PCell.

[0223] Alternatively, the terminal device monitors the PDCCH for scheduling data for the third cell on at least one first USS on the PCell, and the timer expires on the current time slot. In the first time slot after the time slot to which the symbol of the PDCCH after the current time slot belongs, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the PCell.

[0224] Alternatively, the terminal device monitors the PDCCH that schedules the data of the third cell on the USS with the identifier 0 in the search space group, and on the PCell, the symbol of the PDCCH carrying the DCI format is consistent with the switching capability P switchIn the first time slot after the time slot to which the symbol belongs, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the SCell, and determines to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the PCell.

[0225] Scenario b5: The first cell is the primary cell (PCell), the second cell is the secondary cell (SCell), the third cell is the primary cell (PCell) or the secondary cell (SCell), and the first indication information includes an indication of BWP switching on the PCell.

[0226] The terminal device switches the BWP to be switched to according to the BWP switching instruction on the PCell. There is no first USS on the BWP to be switched to, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one first USS on the PCell.

[0227] Scenario b6: The first cell is the primary cell PCell, the second cell is the secondary cell SCell, the third cell is the primary cell PCell or the secondary cell SCell, and the first indication information includes an indication of the search space set switching on the Pell

[0228] The terminal device switches the BWP to be switched to according to the indication of the search space set switching on the PCell. There is no first USS on the BWP to be switched to, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one first USS on the PCell.

[0229] Scenario c1: the first cell is the first secondary cell SCell, the second cell is the second secondary cell SCell, the third cell is the first SCell or the second SCell, and the first indication information includes an indication to activate the second SCell

[0230] The terminal device activates the second SCell according to the instruction to activate the second SCell. At this time, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS of the first SCell.

[0231] Scenario c2: The first cell is the first secondary cell SCell, the second cell is the second secondary cell SCell, the third cell is the first SCell or the second SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of BWP switching on the second SCell

[0232] The terminal device switches the BWP to be switched to according to the instruction of the BWP switching on the second SCell. There is a first USS on the BWP to be switched to, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first SCell.

[0233] Scenario c3: The first cell is the first secondary cell SCell, the second cell is the second secondary cell SCell, the third cell is the first SCell or the second SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of configuring the second SCell as a non-dormant cell

[0234] The terminal device indicates that the second SCell is a non-dormancy cell according to the secondary carrier dormancy indication SCell dormancy indication field in DCI format 0_1 ​​or 1_1, and switches the dormant BWP on the second SCell to a non-dormancy BWP. There is a first USS on the non-dormancy BWP, and the first USS is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0235] Alternatively, the access network device configures up to 5 SCell groups through the parameter SCell-groups-for-dormancy-within-active-time. The SCell dormancy indication has a maximum of 5 bits, and each bit corresponds to one of the SCell groups. The terminal device switches the dormancy BWP on each second SCell in the corresponding SCell group to a non-dormancy BWP based on the bit indication of '1'. The non-dormancy BWP has a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0236] Alternatively, the terminal device indicates that the second cell is a non-dormant cell according to a specific field in DCI format 1_1, and switches the dormancy BWP on the second cell to a non-dormancy BWP. There is no first USS on the non-dormancy BWP, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0237] Alternatively, the terminal device indicates that the second SCell is a non-dormancy cell according to the secondary carrier dormancy indication SCell dormancy indication field in DCI format 2_6, and switches the dormancy BWP on the second SCell to a non-dormancy BWP. There is no first USS on the non-dormancy BWP, and the first USS is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one USS of the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0238] Scenario c4: The first cell is the first secondary cell SCell, the second cell is the second secondary cell SCell, the third cell is the first SCell or the second SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of the search space set switching on the second SCell

[0239] The terminal device receives a DCI format 2_0 indicating that a search space set switch occurs on the PCell, wherein the search space set to be switched to by the search space set switching indication does not have the first USS, and the symbol of the PDCCH carrying the DCI format 2_0 is consistent with the switching capability P switch In the first time slot after the time slot to which the symbol belongs, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS of the first SCell.

[0240] Alternatively, the terminal device monitors the PDCCH for scheduling data for the third cell on at least one first USS on the first SCell, and the timer expires on the current time slot. In the first time slot after the time slot to which the symbol of the PDCCH after the current time slot belongs, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0241] Alternatively, the terminal device monitors the PDCCH that schedules the data of the third cell on the USS with the identifier 0 in the search space group, and on the first SCell, the symbol of the PDCCH carrying the DCI format is consistent with the switching capability P switch In the first time slot after the time slot to which the symbol belongs, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS of the first SCell.

[0242] Scenario d1: The first cell is the first secondary cell SCell, the second cell is the second secondary cell SCell, the third cell is the first SCell or the second SCell, and the first indication information includes an indication to deactivate the first SCell

[0243] The terminal device deactivates the first SCell according to the indication of the deactivated first SCell, or stops the deactivation timer sCellDeactivationTimer of the first SCell, or refreshes or clears all hybrid automatic repeat request buffers HARQ buffers on the first SCell. At this time, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the second SCell.

[0244] Scenario d2: The first cell is the first secondary cell SCell, the second cell is the second secondary cell SCell, the third cell is the first SCell or the second SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of BWP switching on the first SCell

[0245] The terminal device switches the BWP to be switched to according to the BWP switching instruction on the first SCell. There is no first USS on the BWP to be switched to, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the second SCell.

[0246] Scenario d3: The first cell is the first secondary cell SCell, the second cell is the second secondary cell SCell, the third cell is the first SCell or the second SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of configuring the first SCell as a dormant cell.

[0247] The terminal device indicates that the first SCell is a dormant cell according to the secondary carrier dormancy indication SCell dormancy indication field in DCI format 0_1 ​​or 1_1, and the BWP activated on the SCell switches to the dormant BWP. There is no first USS on the dormant BWP, and the first USS is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first SCell.

[0248] Alternatively, the access network device configures up to 5 SCell groups through the parameter SCell-groups-for-dormancy-within-active-time. The SCell dormancy indication has a maximum of 5 bits, and each bit corresponds to one of the SCell groups. The terminal device switches the BWP on each activated first SCell in the corresponding SCell group to a dormant BWP according to the bit indication of '0'. There is no first USS on the dormant BWP. The first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first SCell.

[0249] Alternatively, the terminal device indicates that the first SCell is a dormant cell according to a specific field in DCI format 1_1, and the BWP activated on the first SCell switches to a dormant BWP. There is no first USS on the dormant BWP, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first SCell.

[0250] Alternatively, the terminal device indicates that the first SCell is a dormant cell according to the secondary carrier dormancy indication SCell dormancy indication field in DCI format 2_6, and the BWP activated on the first SCell is switched to the dormant BWP. There is no first USS on the dormant BWP, and the first USS is a PDCCH candidate USS containing a PDCCH that can carry data scheduled in the third cell. At this time, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the second SCell, and determines to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0251] Scenario d4: The first cell is the first secondary cell SCell, the second cell is the second secondary cell SCell, the third cell is the first SCell or the second SCell, and the first indication information is carried in the DCI, and the first indication information includes an indication of the search space set switching on the first SCell

[0252] The terminal device receives a DCI format 2_0 indicating that a search space set switch occurs on the first SCell, wherein the search space set to be switched to by the search space set indicated by the search space set switch indicates that the first USS is present, and the symbol of the PDCCH carrying the DCI format 2_0 is consistent with the switching capability P switch In the first time slot after the time slot to which the symbol belongs, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the second SCell, and stops monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first SCell.

[0253] Alternatively, the terminal device monitors the PDCCH for scheduling data for the third cell on at least one first USS on the first SCell, and the timer expires on the current time slot. In the first time slot after the time slot to which the symbol of the PDCCH after the current time slot belongs, the terminal device determines to monitor the PDCCH for scheduling data for the third cell on at least one first USS on the second SCell, and stops monitoring the PDCCH for scheduling data for the third cell on at least one USS of the first SCell.

[0254] Alternatively, the terminal device monitors the PDCCH that schedules the data of the third cell on the USS with the identifier 1 of the search space group, and on the first SCell, the symbol of the PDCCH carrying the DCI format is consistent with the switching capability P switch In the first time slot after the time slot to which the symbol belongs, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on at least one first USS on the second SCell, and stops monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first SCell.

[0255] S304: The access network device sends a PDCCH to the terminal device.

[0256] Furthermore, in order to simultaneously adapt to the needs of different scenarios, the first indication information provided in the embodiment of the present application may include a first type of indication information and a second type of indication information, the first type of indication information being used to determine the PDCCH for scheduling data of the third cell to be monitored on the first set of USSs belonging to the first USS on the second cell, and the second type of indication information being used to determine the PDCCH for scheduling data of the third cell to be monitored on the second set of USSs belonging to the first USS on the second cell.

[0257] The first type of indication information may include an indication of at least one of scenes a1 to a6, and accordingly, the second type of indication information may include an indication of at least one of scenes a1 to a6. Alternatively, the first type of indication information may include an indication of at least one of scenes b1 to b6, and accordingly, the second type of indication information may include an indication of at least one of scenes b1 to b6. Alternatively, the first type of indication information may include an indication of at least one of scenes c1 to c4, and accordingly, the second type of indication information may include an indication of at least one of scenes c1 to c4. Alternatively, the first type of indication information may include an indication of at least one of scenes d1 to d4, and accordingly, the second type of indication information may include an indication of at least one of scenes d1 to d4.

[0258] When the terminal device monitors the PDCCH for scheduling data of the third cell on at least one USS on the PCell, the terminal device determines to monitor the PDCCH for scheduling data of the third cell on the first set of USSs on the PCell according to the indication of USS switching on the PCell, and stops monitoring the PDCCH for scheduling data of the third cell on the second set of USSs on the SCell.

[0259] For example, using scenario a3, the first type of indication information includes an indication of configuring the SCell as a dormant cell. The terminal device can determine that there is no possibility of data scheduling for the SCell in the near future. Therefore, the terminal device can determine to monitor the PDCCH for scheduling data for the third cell on the first set of USSs on the PCell.

[0260] Continuing with scenario a4, the second type of indication information includes an indication of search space set switching on the SCell. The terminal device can determine that the PDCCH load on the PCell is reduced. Therefore, the terminal device can determine to monitor the PDCCH for scheduling data for the third cell on the second set of USSs on the PCell.

[0261] Therefore, the embodiment of the present application configures multiple sets of USSs on each cell, and the first indication information includes instructions for the terminal device to monitor the PDCCH used to schedule data for the third cell on each set of USS in each cell, which can meet the different needs of various scenarios and has high flexibility.

[0262] Further, Figure 4 A flow chart of another cross-carrier scheduling method provided in an embodiment of the present application. Figure 4 As shown, the cross-carrier scheduling method provided in the embodiment of the present application may also include:

[0263] S303b. The terminal device determines, based on the first indication information, a time to stop monitoring the PDCCH for scheduling data of the third cell by at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0264] Correspondingly, S301b, the access network device determines the time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to send the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the first indication information.

[0265] The access network device and the terminal device determine the above time in the same manner. The following uses the terminal device as an example for illustration. For different scenarios, the terminal device determines the time to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first cell in different manners, or determines the start time for monitoring the PDCCH for scheduling data for the third cell on at least one USS on the second cell in different manners.

[0266] In a specific implementation, different scenarios are described below:

[0267] First, scene a1, scene b1, scene c1 and scene d1

[0268] (1) When the first indication information is carried in RRC signaling or MAC-CE, S303b may specifically be:

[0269] The terminal device determines, based on the effective time of deactivation of the first cell, a start time of monitoring a PDCCH for scheduling data of the third cell on at least one USS on the second cell; or,

[0270] The terminal device determines, based on the activation effectiveness time of the second cell, a time to stop at least one USS on the first cell from monitoring the PDCCH for scheduling data of the third cell.

[0271] (2) When the first indication information is carried in the downlink control information DCI, S303b may specifically be:

[0272] 1) The terminal device determines, based on the DCI and the protocol-specified time, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell. The protocol-specified time is related to the DCI parsing time.

[0273] It should be understood that the terminal device is not configured with minimum K0 and searchSpaceSwitchingDelay-r16. The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the end time of the DCI and the first time slot after the time slot to which the protocol specified time belongs.

[0274] 2) The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the DCI and the search space set switching time.

[0275] It should be understood that the terminal device is not configured with minimum K0, the terminal device reports searchSpaceSwitchingDelay-r16 to the access network device, and the access network device sends the switching capability P according to searchSpaceSwitchingDelay-r16. switch The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the end time of the DCI and the search space set switching time.

[0276] 3) The terminal device determines, based on the DCI and the configured minimum K0, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0277] It should be understood that the terminal device is configured with minimum K0, the terminal device does not report searchSpaceSwitchingDelay-r16 to the access network device, and the access network device does not send the switching capability P switchThe terminal device determines, based on the end time of the DCI and the minimum K0, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0278] 4) The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the larger of the configured minimum K0 and the search space group switching time.

[0279] It should be understood that the terminal device is configured with minimum K0, the terminal device reports searchSpaceSwitchingDelay-r16 to the access network device, and the access network device issues the switching capability P switch The terminal device determines, based on the larger of minimum K0 and the search space group switching time, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0280] Second, scene a2, scene a5, scene b2, scene b5, scene c2 and scene d2

[0281] S303b may specifically be:

[0282] (1) The terminal device determines, based on the effective time of the BWP switching on the first cell, a start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell; wherein, the BWP to be switched to as indicated by the BWP switching indication does not have a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry data for scheduling the third cell.

[0283] (2) When the first indication information is carried in the downlink control information DCI, S303b may specifically be:

[0284] 1) The terminal device determines, based on the DCI and the protocol-specified time, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell. The protocol-specified time is related to the DCI parsing time.

[0285] It should be understood that the terminal device is not configured with minimum K0 and searchSpaceSwitchingDelay-r16. The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the end time of the DCI and the first time slot after the time slot to which the protocol specified time belongs.

[0286] 2) The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the effective time of the DCI and BWP switching.

[0287] It should be understood that the terminal device is not configured with minimum K0, the terminal device reports searchSpaceSwitchingDelay-r16 to the access network device, and the access network device issues the switching capability P according to searchSpaceSwitchingDelay-r16. switch . The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the end time of the DCI and the effective time of the BWP switching.

[0288] 3) The terminal device determines, based on the DCI and the configured minimum K0, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0289] It should be understood that the terminal device is configured with minimum K0, the terminal device does not report searchSpaceSwitchingDelay-r16 to the access network device, and the access network device does not send the switching capability P switch The terminal device determines, based on the end time of the DCI and the minimum K0, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0290] 4) The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the configured minimum K0 and the effective time of the BWP switching.

[0291] It should be understood that the terminal device is configured with minimum K0, the terminal device reports searchSpaceSwitchingDelay-r16 to the access network device, and the access network device issues the switching capability P switch The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the effective time of minimum K0 and BWP switching.

[0292] Third, scene a3, scene b3, scene c3 and scene d3

[0293] S303b may specifically be:

[0294] (1) The terminal device determines, based on the effective time when the first cell becomes a dormant cell, a start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, based on the effective time when the second cell becomes a non-dormant cell, the terminal device determines a time of stopping monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell.

[0295] (2) When the first indication information is carried in the downlink control information DCI, S303b may specifically be:

[0296] 1) The terminal device determines, based on the DCI and the protocol-specified time, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell. The protocol-specified time is related to the DCI parsing time.

[0297] It should be understood that the terminal device is not configured with minimum K0 and searchSpaceSwitchingDelay-r16. The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the end time of the DCI and the first time slot after the time slot to which the protocol specified time belongs.

[0298] 2) The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the effective time of the DCI and the dormant cell / non-dormant cell.

[0299] It should be understood that the terminal device is not configured with minimum K0, the terminal device reports searchSpaceSwitchingDelay-r16 to the access network device, and the access network device issues the switching capability P according to searchSpaceSwitchingDelay-r16. switch . The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the end time of the DCI and the effective time of the dormant cell / non-dormant cell.

[0300] 3) The terminal device determines, based on the DCI and the configured minimum K0, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0301] It should be understood that the terminal device is configured with minimum K0, the terminal device does not report searchSpaceSwitchingDelay-r16 to the access network device, and the access network device does not send the switching capability P switch The terminal device determines, based on the end time of the DCI and the minimum K0, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

[0302] 4) The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the configured minimum K0 and the effective time of the dormant cell / non-dormant cell.

[0303] It should be understood that the terminal device is configured with minimum K0, the terminal device reports searchSpaceSwitchingDelay-r16 to the access network device, and the access network device issues the switching capability P switch The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the minimum K0 and the effective time of the dormant cell / non-dormant cell.

[0304] Fourth, scene a4, scene a6, scene b4, scene b6, scene c4 and scene d4

[0305] S303b may specifically be:

[0306] (1) The terminal device determines, based on the time of switching the search space set on the first cell, a start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell; wherein the indication of the search space set switching indicates that there is no USS in the search space set to be switched to.

[0307] (2) When the first indication information is carried in the downlink control information DCI, S303b may specifically be:

[0308] 1) The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the DCI and the search space set switching time.

[0309] It should be understood that the terminal device is not configured with minimum K0, the terminal device reports searchSpaceSwitchingDelay-r16 to the access network device, and the access network device issues the switching capability P according to searchSpaceSwitchingDelay-r16. switch The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell according to the end time of the DCI and the time of switching the search space set.

[0310] 2) The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell based on the configured minimum K0 and the time of switching the search space set.

[0311] It should be understood that the terminal device is configured with minimum K0, the terminal device reports searchSpaceSwitchingDelay-r16 to the access network device, and the access network device issues the switching capability P switch The terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell, based on the minimum K0 and the time of switching the search space set.

[0312] In the embodiments of the present application, for different scenarios, the terminal device determines the time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines the start time of monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell, thereby ensuring efficient switching between the two cells and reducing the impact on the scheduling of the first cell.

[0313] The various solutions in the above embodiments of the present application can be combined under the premise that there is no contradiction.

[0314] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the interaction between various network elements. It can be understood that, in order to realize the above functions, each network element, such as the access network device and the terminal device, includes at least one of the hardware structure and software modules corresponding to the execution of each function. It should be easy for those skilled in the art to realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software-driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0315] In the embodiment of the present application, the access network device and the terminal device can be divided into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0316] In the case of an integrated unit, Figure 5 A possible structural diagram of the communication device (denoted as communication device 50 ) involved in the above embodiment is shown. The communication device 80 includes a processing unit 501 and a communication unit 502 , and may further include a storage unit 503 . Figure 5 The structural diagram shown can be used to illustrate the structures of the access network equipment and terminal equipment involved in the above embodiments.

[0317] when Figure 5 The schematic diagram shown in the structure is used to illustrate the structure of the terminal device involved in the above embodiment. The processing unit 501 is used to control and manage the actions of the terminal device, for example, to control the terminal device to execute Figure 3 S302a, S302c and S303a in Figure 4 The processing unit 501 may communicate with other network entities through the communication unit 502, for example, Figure 1 The storage unit 503 is used to store program codes and data of the terminal device.

[0318] when Figure 5 When the structural diagram shown is used to illustrate the structure of the terminal device involved in the above embodiment, the communication device 50 can be the terminal device or a chip in the terminal device.

[0319] when Figure 5 The schematic diagram of the structure shown is used to illustrate the structure of the access network device involved in the above embodiment. The processing unit 501 is used to control and manage the actions of the access network device, for example, to control the access network device to execute Figure 3 S301a, S302b and S304 in Figure 4 The processing unit 801 may communicate with other network entities through the communication unit 502, for example, Figure 1The storage unit 503 is used to store program codes and data of the access network device.

[0320] when Figure 5 When the structural diagram shown is used to illustrate the structure of the access network device involved in the above embodiment, the communication device 50 can be the access network device or a chip in the access network device.

[0321] In particular, when the communication device 50 is a terminal device or an access network device, the processing unit 501 can be a processor or a controller, and the communication unit 502 can be a communication interface, a transceiver, a transceiver, a transceiver circuit, a transceiver device, etc. In particular, the communication interface is a general term and can include one or more interfaces. The storage unit 503 can be a memory. When the communication device 50 is a chip within a terminal device or an access network device, the processing unit 501 can be a processor or a controller, and the communication unit 502 can be an input interface and / or output interface, a pin or a circuit, etc. The storage unit 503 can be a storage unit within the chip (for example, a register, a cache, etc.), or it can be a storage unit located outside the chip within the terminal device or the access network device (for example, a read-only memory (ROM), a random access memory (RAM), etc.).

[0322] The communication unit may also be referred to as a transceiver unit. The antenna and control circuit with transceiver functions in the communication device 50 may be considered the communication unit 502 of the communication device 50, and the processor with processing functions may be considered the processing unit 501 of the communication device 50. Optionally, the device used to implement the receiving function in the communication unit 502 may be considered the receiving unit, which is used to perform the receiving steps in the embodiments of the present application. The receiving unit may be a receiver, a receiver, a receiving circuit, etc.

[0323] During implementation, each step of the method provided in this embodiment can be completed by hardware integrated logic circuits in a processor or by software instructions. The steps of the method disclosed in the embodiments of this application can be directly implemented as execution by a hardware processor, or as a combination of hardware and software modules in a processor.

[0324] The processor in this application may include, but is not limited to, at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, and other types of computing devices that run software. Each computing device may include one or more cores for executing software instructions to perform operations or processing. The processor may be a separate semiconductor chip, or it may be integrated into a semiconductor chip together with other circuits. For example, it may form an SoC (system on a chip) with other circuits (such as a codec circuit, a hardware acceleration circuit, or various bus and interface circuits), or it may be integrated into the ASIC as a built-in processor of the ASIC. The ASIC with the integrated processor may be packaged separately or together with other circuits. In addition to the core for executing software instructions to perform operations or processing, the processor may further include necessary hardware accelerators, such as a field programmable gate array (FPGA), a PLD (programmable logic device), or a logic circuit that implements dedicated logic operations.

[0325] The memory in the embodiments of the present application may include at least one of the following types: read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or electrically erasable programmable read-only memory (EEPROM). In some scenarios, the memory may also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this.

[0326] An embodiment of the present application also provides a computer-readable storage medium, comprising instructions, which, when executed on a computer, enables the computer to execute any of the above methods.

[0327] An embodiment of the present application also provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute any of the above methods.

[0328] An embodiment of the present application also provides a communication system, including: the above-mentioned access network device and terminal equipment.

[0329] An embodiment of the present application also provides a chip, which includes a processor and an interface circuit, the interface circuit is coupled to the processor, the processor is used to run a computer program or instruction to implement the above method, and the interface circuit is used to communicate with other modules outside the chip.

[0330] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

[0331] It should be noted that the above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be covered by the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. A cross-carrier scheduling method performed by a terminal device or a chip of the terminal device, characterized in that: include: monitoring a physical downlink control channel (PDCCH) for scheduling data of a third cell on at least one user equipment (UE)-specific search space (USS) on a first cell, and receiving first indication information, where the first indication information is used to determine to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or to determine to monitor the PDCCH for scheduling data of the third cell on at least one USS on a second cell, where the third cell is the first cell or the second cell; According to the first indication information, monitoring of the PDCCH for scheduling data of the third cell on at least one USS of the first cell is stopped, and monitoring of the PDCCH for scheduling data of the third cell on all USSs of the second cell is determined.

2. The method according to claim 1, characterized in that The first indication information includes at least one of the following indications: an instruction to deactivate the first cell; An indication of a partial bandwidth BWP switching on the first cell, wherein the BWP to be switched to indicated by the indication of the BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling the third cell; an indication for configuring the first cell as a dormant cell; An indication of search space set switching on the first cell, wherein the indication of search space set switching indicates that the search space set to be switched to does not include the first USS.

3. The method according to claim 1, characterized in that The first indication information includes at least one of the following indications: an indication of activating the second cell, wherein a search space set of the activated second cell includes a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling the third cell; an indication of BWP switching on the second cell, wherein the BWP to be switched to as indicated by the indication of BWP switching has the first USS; configuring an indication that the second cell is a non-dormant cell, wherein the search space of the non-dormant second cell includes the first USS; An indication of search space set switching occurs on the second cell, wherein the indication of search space set switching indicates that the search space set to be switched to includes the first USS.

4. The method according to claim 2 or 3, characterized in that The first indication information includes first-type indication information and second-type indication information, the first-type indication information being used to determine to monitor, on a first set of USSs belonging to the first USS on the second cell, a PDCCH for scheduling data for the third cell, and the second-type indication information being used to determine to monitor, on a second set of USSs belonging to the first USS on the second cell, a PDCCH for scheduling data for the third cell.

5. The method according to any one of claims 1 to 3, characterized in that Also includes: According to the first indication information, determine a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determine a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

6. The method according to claim 5, characterized in that When the first indication information is carried in RRC signaling or MAC-CE, determining, according to the first indication information, a time to stop monitoring a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determining a start time to monitor a PDCCH for scheduling data of the third cell on at least one USS on the second cell, includes: determining, according to the effective time of deactivation of the first cell, a start time of monitoring a PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, A time for stopping monitoring of a PDCCH for scheduling data of the third cell on at least one USS on the first cell is determined according to the activation effectiveness time of the second cell.

7. The method according to claim 5, characterized in that When the first indication information is carried in downlink control information DCI, determining, according to the first indication information, a time to stop monitoring a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determining a start time to monitor a PDCCH for scheduling data of the third cell on at least one USS on the second cell, includes: Determine, based on the DCI and a protocol-specified time, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or Determine, based on the DCI and the search space set switching time, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determine a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or Determine, based on the DCI and the configured minimum K0, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determine a start time to monitor the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or Determine, based on the larger of the configured minimum K0 and the search space group switching time, a time to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determine a start time for monitoring the PDCCH for scheduling data of the third cell on at least one USS on the second cell; the Minimum K0 refers to the minimum available time slot offset of the PDSCH when scheduling across time slots.

8. The method according to claim 5, characterized in that Determining, according to the first indication information, a time to stop monitoring, on at least one USS on the first cell, a PDCCH for scheduling data of the third cell, or determining a start time to monitor, on at least one USS on the second cell, a PDCCH for scheduling data of the third cell, includes: Determining, based on the effective time of the BWP switching on the first cell, a start time of monitoring a PDCCH for scheduling data of the third cell on at least one USS on the second cell; wherein the BWP to be switched to as indicated by the BWP switching indication does not have a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry the PDCCH for scheduling data of the third cell; or, Determine, based on the effective time of the BWP switching on the second cell, a time to stop monitoring the PDCCH used to schedule data for the third cell on at least one USS on the first cell; wherein, the BWP to be switched to as indicated by the BWP switching indication has a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry the PDCCH that schedules data for the third cell.

9. The method according to claim 5, characterized in that Determining, according to the first indication information, a time to stop monitoring, on at least one USS on the first cell, a PDCCH for scheduling data of the third cell, or determining a start time to monitor, on at least one USS on the second cell, a PDCCH for scheduling data of the third cell, includes: determining, according to the time when the first cell becomes a dormant cell, a start time for monitoring a PDCCH for scheduling data of the third cell on at least one USS on the second cell; or According to the time when the second cell becomes a non-dormant cell, a time for stopping monitoring of a PDCCH for scheduling data of the third cell on at least one USS on the first cell is determined.

10. The method according to claim 5, characterized in that Determining, according to the first indication information, a time to stop monitoring, on at least one USS on the first cell, a PDCCH for scheduling data of the third cell, or determining a start time to monitor, on at least one USS on the second cell, a PDCCH for scheduling data of the third cell, includes: determining, based on a time of a search space set switching on the first cell, a start time of monitoring a PDCCH for scheduling data for the third cell on at least one USS on the second cell; wherein the search space set to be switched to, as indicated by the indication of the search space set switching, does not include a first USS, and the first USS is a USS that includes a PDCCH candidate for a PDCCH that can carry data for scheduling the third cell; or, Determine, based on the time of switching the search space set on the second cell, the time to stop monitoring the PDCCH for scheduling data for the third cell on at least one USS on the first cell; wherein the indication of the search space set switching indicates that the search space set to be switched to includes the first USS.

11. A cross-carrier scheduling method executed by an access network device or a chip of the access network device, characterized in that: include: determining to stop sending a physical downlink control channel (PDCCH) for scheduling data of a third cell in at least one user equipment (UE)-specific search space (USS) of a first cell, and determining to send a PDCCH for scheduling data of the third cell in all USSs of a second cell, where the third cell is the first cell or the second cell; Sending first indication information to the terminal device; wherein the first indication information is used to determine to stop monitoring the PDCCH for scheduling data of the third cell on at least one USS of the first cell, and to determine to monitor the PDCCH for scheduling data of the third cell on all USSs on the second cell.

12. The method according to claim 11, characterized in that The first indication information includes at least one of the following indications: an instruction to deactivate the first cell; An indication of a partial bandwidth BWP switching on the first cell, wherein the BWP to be switched to indicated by the indication of the BWP switching does not have a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling the third cell; an indication for configuring the first cell as a dormant cell; An indication of search space set switching on the first cell, wherein the indication of search space set switching indicates that the search space set to be switched to does not include the first USS.

13. The method according to claim 11, characterized in that The first indication information includes at least one of the following indications: an indication of activating the second cell, wherein a search space set of the activated second cell includes a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry data for scheduling the third cell; an indication of BWP switching on the second cell, wherein the BWP to be switched to as indicated by the indication of BWP switching has the first USS; configuring an indication that the second cell is a non-dormant cell, wherein the search space of the non-dormant second cell includes the first USS; An indication of search space set switching occurs on the second cell, wherein the indication of search space set switching indicates that the search space set to be switched to includes the first USS.

14. The method according to claim 12 or 13, characterized in that The first indication information includes first-type indication information and second-type indication information. The first-type indication information is used to instruct the terminal device to determine to monitor the PDCCH for scheduling data of the third cell on the first set of USSs belonging to the first USS on the second cell. The second-type indication information is used to instruct the terminal device to determine to monitor the PDCCH for scheduling data of the third cell on the second set of USSs belonging to the first USS on the second cell.

15. The method according to any one of claims 11 to 13, characterized in that Also includes: According to the first indication information, determine a time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determine a start time to send the PDCCH for scheduling data of the third cell on at least one USS on the second cell.

16. The method according to claim 15, characterized in that When the first indication information is carried in RRC signaling or MAC-CE, the access network device determines, according to the first indication information, a time to stop sending a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determines a start time to send a PDCCH for scheduling data of the third cell on at least one USS on the second cell, including: determining, according to the effective time of deactivation of the first cell, a start time of sending a PDCCH for scheduling data of the third cell on at least one USS on the second cell; or, A time for stopping sending a PDCCH for scheduling data of the third cell on at least one USS on the first cell is determined according to the activation effectiveness time of the second cell.

17. The method according to claim 15, characterized in that When the first indication information is carried in downlink control information DCI, determining, according to the first indication information, a time for stopping sending a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determining a start time for sending a PDCCH for scheduling data of the third cell on at least one USS on the second cell, includes: Determine, based on the DCI and a protocol-specified time, a time to stop sending a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or a start time to send a PDCCH for scheduling data of the third cell on at least one USS on the second cell; or Determine, based on the DCI and the search space set switching time, a time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determine a start time to send the PDCCH for scheduling data of the third cell on at least one USS on the second cell; or Determine, based on the DCI and the configured minimum K0, a time to stop sending a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determine a start time to send a PDCCH for scheduling data of the third cell on at least one USS on the second cell; or Determine, according to the larger of the configured minimum K0 and the search space group switching time, a time to stop sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determine a start time for sending the PDCCH for scheduling data of the third cell on at least one USS on the second cell; the Minimum K0 refers to the minimum available time slot offset of the PDSCH when scheduling across time slots.

18. The method according to claim 15, characterized in that Determining, according to the first indication information, a time for stopping sending a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determining a start time for sending a PDCCH for scheduling data of the third cell on at least one USS on the second cell, includes: Determining, based on the effective time of the BWP switching on the first cell, a start time for sending a PDCCH for scheduling data of the third cell on at least one USS on the second cell; wherein the BWP to be switched to as indicated by the BWP switching indication does not have a first USS, and the first USS is a USS of a PDCCH candidate including a PDCCH that can carry the PDCCH for scheduling data of the third cell; or, Determine, based on the effective time of the BWP switching on the second cell, a time for stopping sending the PDCCH for scheduling data for the third cell on at least one USS on the first cell; wherein, the BWP to be switched to as indicated by the BWP switching indication has a first USS, and the first USS is a USS of a PDCCH candidate containing a PDCCH that can carry the PDCCH for scheduling data for the third cell.

19. The method according to claim 15, characterized in that Determining, according to the first indication information, a time for stopping sending a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determining a start time for sending a PDCCH for scheduling data of the third cell on at least one USS on the second cell, includes: determining, according to the time at which the first cell becomes a dormant cell, a start time for sending a PDCCH for scheduling data of the third cell on at least one USS on the second cell; or According to the effective time of the second cell being a non-dormant cell, a time for stopping sending the PDCCH for scheduling data of the third cell on at least one USS on the first cell is determined.

20. The method according to claim 15, wherein Determining, according to the first indication information, a time for stopping sending a PDCCH for scheduling data of the third cell on at least one USS on the first cell, or determining a start time for sending a PDCCH for scheduling data of the third cell on at least one USS on the second cell, includes: determining, based on a time of a search space set switching on the first cell, a start time for sending a PDCCH for scheduling data for the third cell on at least one USS on the second cell; wherein the search space set to be switched to by the indication of the search space set switching does not include a first USS, and the first USS is a USS that includes a PDCCH candidate for a PDCCH that can carry data for scheduling the third cell; or, Determine, based on the time of switching the search space set on the second cell, the time to stop sending the PDCCH for scheduling data for the third cell on at least one USS on the first cell; wherein the indication of the search space set switching indicates that the search space set to be switched to includes the first USS.

21. A communication device, characterized in that: include: A processor and a storage medium; wherein the storage medium is used to store one or more computer programs, and when the one or more computer programs stored in the storage medium are executed by the processor, the communication device executes the method according to any one of claims 1 to 10.

22. A communication device, characterized in that: include: A processor and a storage medium; wherein the storage medium is used to store one or more computer programs, and when the one or more computer programs stored in the storage medium are executed by the processor, the communication device executes the method as described in any one of claims 11 to 20.

23. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a program, and when the program is called by the processor, the cross-carrier scheduling method described in any one of claims 1 to 10 is executed, or the cross-carrier scheduling method described in any one of claims 11 to 20 is executed.

24. A computer program product, characterized in that When the program is called by the processor, the cross-carrier scheduling method described in any one of claims 1 to 10 is executed, or the cross-carrier scheduling method described in any one of claims 11 to 20 is executed.

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