A method and device for monitoring a physical downlink control channel

Abstract

A method and apparatus for monitoring a physical downlink control channel, for clarifying how a terminal device monitors a PDCCH. The terminal device receives first information from a network device, the first information being used to instruct the terminal device not to monitor the PDCCH within a preset time domain length; the preset time domain length is related to a search space group for monitoring the PDCCH; the terminal device does not monitor the PDCCH within the preset time domain length according to the first information. In this way, when support for skipping PDCCH and switching of the search space group are indicated at the same time, the matching of the time domain length for skipping the PDCCH and the monitoring period of the search space group can be ensured.

Description

[0001] This application claims the priority of the Chinese patent application filed with the Chinese Patent Office on February 24, 2021, with application number 202110209919.1 and invention name "A reference signal indication method", and all of its contents are incorporated by reference in this application; this application claims the priority of the Chinese patent application filed with the Chinese Patent Office on March 29, 2021, with application number 202110335366.4 and invention name "A method and device for monitoring a physical downlink control channel", and all of its contents are incorporated by reference in this application. This application claims the priority of the Chinese patent application filed with the Chinese Patent Office on October 27, 2021, with application number 202111255543.4 and invention name "A method and device for monitoring a physical downlink control channel", and all of its contents are incorporated by reference in this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a method and device for monitoring a physical downlink control channel (PDCCH). Background Art

[0003] Before the network device and the terminal device transmit data, the network device will send data scheduling information, such as PDCCH, to the terminal device. In order to avoid losing scheduling information, the terminal device needs to frequently monitor PDCCH according to the configuration of the network device. Frequent monitoring of PDCCH by the terminal device will result in high power consumption of the terminal device. At present, research on power consumption saving of terminal devices is becoming more and more common, and detailed optimization solutions to reduce power consumption of terminal devices have become a research direction in the industry. Summary of the invention

[0004] The present application provides a method and apparatus for PDCCH monitoring, which are used to clarify how a terminal device monitors PDCCH.

[0005] In a first aspect, the present application provides a method for PDCCH monitoring, which may include: a network device determines first information, wherein the first information is used to indicate that a terminal device does not monitor PDCCH within a preset time domain length; wherein the preset time domain length is related to a search space group for monitoring PDCCH; the network device sends the first information to the terminal device; then, the terminal device does not monitor PDCCH within the preset time domain length according to the first information.

[0006] Through the above method, the terminal device does not monitor PDCCH within the preset time domain length indicated by the first information, which can reduce the power consumption of the terminal device. Moreover, since the preset time domain length is related to the search space group for monitoring PDCCH, it is possible to ensure the matching of the time domain length for skipping PDCCH and the monitoring period of the search space group when supporting skipping PDCCH and search space group switching are indicated at the same time.

[0007] In one possible design, the first information can also be used to indicate the search space group for monitoring PDCCH. This allows the terminal device to monitor PDCCH by skipping PDCCH and switching the search space group, so that the terminal device can monitor PDCCH more flexibly while reducing the power consumption of the terminal device.

[0008] In one possible design, the first information may include a first indication field and a second indication field; wherein, when the first indication field is a first value, the preset time domain length may be a first time domain length, and the second indication field is used to indicate that the terminal device does not monitor the PDCCH within the first time domain length; the first time domain length is related to the search space group for which the terminal device currently monitors the PDCCH; when the first indication field is a second value, the second indication field is used to indicate that the terminal device monitors the PDCCH according to the first search space group. In this way, the two indication fields of the first information can be used to indicate that the terminal device does not monitor the time domain length of the PDCCH or that the terminal device monitors the search space of the PDCCH.

[0009] In one possible design, the first information includes A bits, and different values ​​of the A bits correspond to different time domain lengths for not monitoring PDCCH, and / or, different search space groups for monitoring PDCCH; A is an integer greater than or equal to 2. In this way, the first information can accurately indicate the terminal device to monitor the time domain length of PDCCH, and / or, to monitor the search space group of PDCCH.

[0010] In one possible design, when the first information indicates the second search space group, the value of the A bits corresponds to the second search space group and the second time domain length, and the second time domain length is 0. In this way, the first information can be configured to be 0 to indicate only the search space for monitoring the PDCCH.

[0011] In one possible design, the monitoring period of the second search space group is greater than the monitoring period of the third search space group, and the third search space group is one of multiple search space groups configured by the network device for the terminal device. In this way, the search space group with a smaller monitoring period can be used in combination with skipping PDCCH, while the search space group with a larger monitoring period is not used in combination with skipping PDCCH, so that the terminal device can monitor PDCCH more flexibly.

[0012] In one possible design, the monitoring period of the second search space group may be a preset period; or, the monitoring period of the second search space group may be a second monitoring period, wherein the second monitoring period may be the largest monitoring period or the smallest monitoring period among the monitoring periods of at least one search space included in the second search space group; or, the second monitoring period may be the monitoring period of the search space in which the terminal device currently receives downlink control information; or, the second monitoring period may be the largest monitoring period or the smallest monitoring period among the monitoring periods of multiple search spaces when the terminal device receives downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among multiple search spaces, or the monitoring period of the search space with the smallest index value among multiple search spaces. In this way, the monitoring period of the second search space group can be accurately determined.

[0013] In one possible design, the monitoring period of the third search space group may be a preset period; or, the monitoring period of the third search space group may be a third monitoring period, wherein the third monitoring period may be the largest monitoring period or the smallest monitoring period among the monitoring periods of at least one search space included in the third search space group; or, the third monitoring period may be the monitoring period of the search space in which the terminal device currently receives downlink control information; or, the third monitoring period may be the largest monitoring period or the smallest monitoring period among the monitoring periods of multiple search spaces when the terminal device receives downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among multiple search spaces, or the monitoring period of the search space with the smallest index value among multiple search spaces. In this way, the monitoring period of the third search space group can be accurately determined.

[0014] In one possible design, the preset time domain length may be one of a first time domain length set, the first time domain length set being one of N time domain length sets, where N is an integer greater than 1 or equal to 1; or, the preset time domain length may be an integer multiple of a monitoring period of a search space group of a PDCCH currently monitored by the terminal device. In this way, flexible configuration of the preset time domain length may be achieved.

[0015] In one possible design, each of the N time domain length sets is associated with one of the M search space groups, where the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1. In this way, when support for skipping PDCCH and SSSG switching is indicated at the same time, the time domain length of skipping PDCCH and the monitoring period of SSSG can be matched.

[0016] In a possible design, the monitoring period of the search space group may be a preset period; or, the monitoring period of the search space group may be a first monitoring period; wherein, the first monitoring period may be the maximum monitoring period or the minimum monitoring period of the monitoring period of at least one search space included in the search space group; or, the first monitoring period may be the monitoring period of the search space where the terminal device currently receives the downlink control information; or, the first monitoring period may be the maximum monitoring period or the minimum monitoring period of the monitoring periods of the multiple search spaces when the terminal device receives the downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among the multiple search spaces, or the monitoring period of the search space with the smallest index value among the multiple search spaces. In this way, the monitoring period of the search space group may be accurately determined, and further, when the preset time domain length may be an integer multiple of the monitoring period of the search space group where the terminal device currently monitors the PDCCH, the preset time domain length may be accurately determined.

[0017] In a possible design, the starting position of the preset time domain length may be the first time domain position; the first time domain position may be the time slot in which the terminal device receives the downlink control information; or, the first time domain position may be the next time slot of the time slot in which the terminal device receives the downlink control information; or, when the first monitoring period is the largest monitoring period or the smallest monitoring period of the monitoring period of at least one search space included in the search space group, the first time domain position may be the position of monitoring PDCCH in the search space of the next largest monitoring period or the smallest monitoring period of the search space corresponding to the first monitoring period. In this way, the start time when the terminal device does not monitor PDCCH can be accurately determined.

[0018] In one possible design, the monitoring period of the search space group is a preset period, which can be specifically: the terminal device receives second information from the network device, and the second information is used to configure the monitoring period of the search space group for monitoring the PDCCH. In this way, the network device can configure the monitoring period of the search space group.

[0019] In one possible design, the search space group configuration information of the fourth search space group includes the second information, the second information includes the monitoring period of the fourth search space group, and the fourth search space group is one of multiple search space groups configured by the network device for the terminal device. In this way, the network device can configure the monitoring period for each search space group.

[0020] In one possible design, the second information includes at least one monitoring period; when the second information includes one monitoring period, the monitoring periods of the M search space groups are all the one monitoring period; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; when the second information includes M monitoring periods, the M search space groups correspond one-to-one to the M monitoring periods. In this way, the network device can configure a monitoring period for each search space group.

[0021] In one possible design, the second information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device.

[0022] In one possible design, the second information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device, and the terminal device also receives fifth information from the network device, and the fifth information is also used to configure the monitoring period of the search space group for monitoring PDCCH.

[0023] In one possible design, the search space group configuration information of the seventh search space group includes the fifth information, the fifth information includes the monitoring period of the seventh search space group, and the seventh search space group is one of the multiple search space groups configured by the network device for the terminal device.

[0024] In one possible design, when the network device is configured with the second information but not with the fifth information, the second information includes a monitoring period, and the monitoring period of the search space group corresponding to the second information is the one monitoring period.

[0025] In one possible design, when the network device is configured with the second information and the fifth information, the fifth information includes a monitoring period, and the monitoring period of the search space group corresponding to the fifth information is the one monitoring period.

[0026] In one possible design, the terminal device receives third information from the network device, and the third information is used to configure a time domain length set corresponding to a search space group for monitoring PDCCH. In this way, the network device can configure a corresponding time domain length set for each search space group.

[0027] In one possible design, the search space group configuration information of the fifth search space group includes the third information, the third information includes a time domain length set, the time domain length set includes one or more time domain lengths, and the preset time domain length is one of the one or more time domain lengths included in the third information; the fifth search space group is one of multiple search space groups configured by the network device for the terminal device. In this way, the network device can configure a corresponding time domain length set for each search space group.

[0028] In one possible design, the third information includes at least one time domain length set; when the third information includes a time domain length set, the M search space groups all correspond to the one time domain length set; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; the preset time domain length is a time domain length in the one time domain length set; when the third information includes M time domain length sets, the M search space groups correspond one-to-one to the M time domain length sets, and the preset time domain length is a time domain length in the time domain length set corresponding to the search space group monitoring the PDCCH. In this way, the network device can configure a corresponding time domain length set for each search space group.

[0029] In one possible design, the third information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device.

[0030] In one possible design, the third information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device, and the terminal device also receives fourth information from the network device, and the fourth information is also used to configure the monitoring period of the search space group for monitoring PDCCH.

[0031] In one possible design, the search space group configuration information of the sixth search space group includes the fourth information, the fourth information includes a time domain length set, the time domain length set includes one or more time domain lengths, and the preset time domain length is one of the one or more time domain lengths included in the third information or the fourth information; the sixth search space group is one of the multiple search space groups configured by the network device for the terminal device.

[0032] In one possible design, when the network device is configured with the third information but not with the fourth information, the third information includes a time domain length set, the search space group corresponding to the third information corresponds to the time domain length set; and the preset time domain length is a time domain length in the time domain length set.

[0033] In one possible design, when the network device is configured with the third information and the fourth information, the fourth information includes a time domain length set, the search space group corresponding to the fourth information corresponds to the time domain length set; the preset time domain length is a time domain length in the time domain length set.

[0034] In a second aspect, the present application further provides a communication device, which may be a terminal device, and the communication device has the function of implementing the terminal device in the first aspect or each possible design example of the first aspect. The function may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0035] In one possible design, the structure of the communication device includes a transceiver unit and a processing unit, which can perform the corresponding functions of the terminal device in the above-mentioned first aspect or each possible design example of the first aspect. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0036] In one possible design, the structure of the communication device includes a transceiver and a processor, and optionally a memory, the transceiver is used to send and receive data, and to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions of the terminal device in the first aspect or each possible design example of the first aspect. The memory is coupled to the processor and stores the necessary program instructions and data for the communication device.

[0037] In a third aspect, the present application further provides a communication device, which may be a network device, and which has the function of implementing the network device in the first aspect or each possible design example of the first aspect. The function may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0038] In one possible design, the structure of the communication device includes a transceiver unit and a processing unit, which can perform the corresponding functions of the network device in the above-mentioned first aspect or each possible design example of the first aspect. Please refer to the detailed description in the method example for details, which will not be repeated here.

[0039] In one possible design, the structure of the communication device includes a transceiver and a processor, and optionally a memory, the transceiver is used to send and receive data, and to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions of the network device in the first aspect or each possible design example of the first aspect. The memory is coupled to the processor and stores the necessary program instructions and data for the communication device.

[0040] In a fourth aspect, an embodiment of the present application provides a communication system, which may include the terminal device and network device mentioned above.

[0041] In a fifth aspect, a computer-readable storage medium provided by an embodiment of the present application stores program instructions, and when the program instructions are run on a computer, the computer executes the method described in the first aspect of the embodiment of the present application and any possible design thereof. Exemplarily, the computer-readable storage medium can be any available medium that can be accessed by a computer. Taking this as an example but not limited to: a computer-readable medium may include a non-transient computer-readable medium, a random access memory (random-access memory, RAM), a read-only memory (read-only memory, ROM), an electrically erasable programmable read-only memory (electrically EPROM, EEPROM), a CD-ROM or other optical disk storage, a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer.

[0042] In a sixth aspect, an embodiment of the present application provides a computer program product comprising computer program codes or instructions, which, when executed on a computer, enables the computer to implement the method described in the first aspect or any possible design of the first aspect.

[0043] In the seventh aspect, the present application also provides a chip, including a processor, which is coupled to a memory and is used to read and execute program instructions stored in the memory so that the chip implements the method described in the above-mentioned first aspect or any possible design of the first aspect.

[0044] For each of the above-mentioned aspects from the second to the seventh aspects and the technical effects that may be achieved by each of the aspects, please refer to the above-mentioned description of the technical effects that can be achieved by the first aspect or various possible schemes in the first aspect, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the architecture of a communication system provided for this application;

[0046] Figure 2 A schematic diagram of monitoring PDCCH provided in this application;

[0047] Figure 3 A schematic diagram of skipping PDCCH monitoring provided by the present application;

[0048] Figure 4 A schematic diagram of a search space group provided for this application;

[0049] Figure 5 A schematic diagram of another method for monitoring PDCCH provided in this application;

[0050] Figure 6 A flowchart of a PDCCH monitoring method provided by the present application;

[0051] Figure 7 A schematic diagram of the structure of a communication device provided by the present application;

[0052] Figure 8 A structural diagram of a communication device provided in this application. DETAILED DESCRIPTION

[0053] The present application will be described in further detail below in conjunction with the accompanying drawings.

[0054] The embodiment of the present application provides a method and device for monitoring PDCCH, which is used to clarify how a terminal device monitors PDCCH. The method and device described in the present application are based on the same technical concept. Since the method and device solve the problem in a similar way, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0055] In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance or order.

[0056] In the description of the present application, "at least one" means one or more, and more means two or more.

[0057] In order to more clearly describe the technical solution of the embodiment of the present application, the method and device for PDCCH monitoring provided by the embodiment of the present application are described in detail below in conjunction with the accompanying drawings.

[0058] Figure 1 The architecture of the communication system involved in the embodiment of the present application is shown, and the architecture of the communication system includes a network device and a terminal device, wherein:

[0059] The network device is a device with a wireless transceiver function or a chip that can be set in the network device. The network device includes but is not limited to: a base station (generation node B, gNB), a radio network controller (radio network controller, RNC), a node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (for example, home evolved NodeB, or homeNode B, HNB), a baseband unit (baseband unit, BBU), an access point (access point, AP) in a wireless fidelity (wireless fidelity, Wi-Fi) system, a wireless relay node, a wireless backhaul node, a transmission point (transmission and reception point, TRP or transmission point, TP), etc., and can also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (distributed unit, DU), etc.

[0060] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB, for example, the CU implements the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers, and the DU implements the functions of the radio link control (RLC), media access control (MAC) and physical (PHY) layers. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling or PHCP layer signaling, can also be considered to be sent by the DU, or by the DU+RU. It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, and the CU can also be divided into a network device in the core network CN, without limitation.

[0061] The terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a smart wearable device (smart glasses, smart watch, smart headset, etc.), a wireless terminal in smart home, etc., and may also be a chip or chip module (or chip system) that can be set in the above devices, etc. The embodiment of the present application does not limit the application scenario. In the present application, a terminal device having a wireless transceiver function and a chip that can be provided in the aforementioned terminal device are collectively referred to as a terminal device.

[0062] It should be noted that Figure 1 The communication system shown may be, but is not limited to, a fourth generation (4G) system, a fifth generation (5G) system, such as a new generation of wireless access technology (NR). Optionally, the method of the embodiment of the present application is also applicable to various future communication systems, such as a sixth generation (6G) system or other communication networks.

[0063] In NR, the process of data transmission can be described as follows:

[0064] When a network device schedules a terminal device to receive downlink data, or when a network device schedules a terminal device to send uplink data, it will first send downlink control information (DCI). The DCI contains a data scheduling information, which indicates the transmission parameters of the physical downlink shared channel (PDSCH) (which contains downlink data) or the physical uplink shared channel (PUSCH) (which contains uplink data). These transmission parameters include the time-frequency domain resource location of PDSCH / PUSCH. Specifically, the above DCI is carried in the PDCCH. For downlink data, the network device will indicate the K0 value through the time domain resource allocation (TDRA) field in the DCI to determine the time slot interval between the PDCCH and the PDSCH; for uplink data, the network device will indicate the K2 value through the TDRA field in the DCI to determine the time slot interval between the PDCCH and the PUSCH.

[0065] The network device sends downlink data at the time-frequency domain resource location indicated in the DCI, and the terminal device receives it at the corresponding location; or, the terminal device sends uplink data at the time-frequency domain resource location indicated in the DCI, and the network device receives it at the corresponding location.

[0066] When receiving its own DCI, the terminal device needs to blindly detect (blind detect, BD) the PDCCH sent to it in the downlink control area, that is, the terminal device monitors many PDCCH candidate positions (PDCCH candidate) to find out whether there is one sent to it. A group of candidate positions that the terminal device needs to blindly detect constitutes a search space (searchspace set, SSS), which can also be called a search space set. Depending on the configuration of the network device, the terminal device may monitor one (group) or more (groups) of search spaces to find out whether there is a PDCCH sent to it. Among them, the location where the terminal device needs to monitor the PDCCH can also be called a PDCCH monitoring occasion.

[0067] In some embodiments, the terminal device monitors the PDCCH periodically according to the configuration of the search space. Figure 2 , which is a schematic diagram of monitoring PDCCH with a period of 1 time slot and 4 time slots respectively. Figure 2When the period shown in (a) is 1 time slot, it is necessary to monitor the PDCCH in each time slot. Figure 2 When the period shown in (b) is 4 time slots, PDCCH is monitored every 4 time slots.

[0068] Based on the above description, the terminal device will frequently monitor the PDCCH, but if there is no business happening in the terminal device for a period of time, that is, there is no downlink data or uplink data to be transmitted, the terminal device cannot receive the PDCCH sent to itself even if it monitors the PDCCH. If the terminal device still monitors the PDCCH during these times, it will cause power consumption of the terminal device.

[0069] In order to reduce the power consumption of terminal devices, one possible solution is to introduce the concept of PDCCH skipping. Specifically, the network device can send an indication message to the terminal device, indicating that the terminal device can skip PDCCH monitoring for a period of time. The terminal device skipping PDCCH monitoring for a period of time can be equivalently described as the terminal device not monitoring PDCCH for a period of time. This period of time when PDCCH is not monitored can be called skipping duration. For example Figure 3 As shown in the schematic diagram of skipping PDCCH monitoring, the terminal device originally needs to monitor PDCCH in each time slot. When the terminal device is instructed by the network device not to monitor PDCCH for a period of time, the terminal device may not monitor PDCCH during the instructed period of time.

[0070] Another solution to reduce the power consumption of the terminal device may be: the network device may send an indication message to the terminal device, instructing the terminal device to switch between two pre-configured search spaces. For example, Figure 4 As shown, the terminal device is configured with 2 groups of search spaces, the period corresponding to search space group 1 is 1 time slot, and the period corresponding to search space group 2 is 4 time slots. The network device can send an indication message to the terminal device, indicating that the terminal device can switch from monitoring search space group 1 to monitoring search space group 2, thereby reducing the number of PDCCH monitoring times to save power consumption of the terminal device.

[0071] Both of the above solutions can achieve the purpose of "reducing PDCCH monitoring". However, in the first solution, the way of skipping PDCCH is more flexible and applicable to scheduling changes of small time scale (i.e., the change of scheduling is more frequent); while in the second solution, the way of search space switching (hereinafter collectively referred to as search space set group switching (SSSG) switching) is applicable to the situation of larger time scale changes.

[0072] In order to obtain the benefits of both methods, it is possible to support both functions at the same time. When skipping PDCCH and SSSG switching can be indicated at the same time, it is necessary to consider whether the skipping duration of skipping PDCCH matches the period of SSSG. The period of SSSG can be the monitoring period of the search space included in SSSG. For example, Figure 5 In the schematic diagram shown, it is assumed that SSSG0 includes search space 0, the monitoring period of search space 0 is 1 time slot, SSSG1 includes search space 1, the monitoring period of search space 1 is 5 time slots. The skipping time of skipping PDCCH is 3 time slots. Figure 5 As shown in (a), when the terminal device monitors PDCCH according to SSSG0, it receives instruction information from the network device, instructing the terminal device to skip PDCCH monitoring for 3 time slots. Compared with always monitoring PDCCH according to SSSG0, PDCCH monitoring for 3 time slots can be reduced. At this time, skipping PDCCH is more suitable for use with SSSG0. However, if Figure 5 As shown in (b), when the terminal device monitors PDCCH according to SSSG1, when receiving the instruction information of the network device, instructing the terminal device to skip PDCCH monitoring of 3 time slots, at this time, since there is no PDCCH monitoring opportunity in the skipped time slot itself, compared with always using SSSG1, PDCCH monitoring is not actually reduced. Therefore, skipping PDCCH monitoring at this time does not achieve the purpose of energy saving.

[0073] Based on this, the present application proposes a PDCCH monitoring method, which clarifies how to monitor PDCCH and can ensure the matching of the skip time of PDCCH and the period of SSSG, that is, the matching of the skip time of PDCCH and the period of search space contained in SSSG.

[0074] It should be noted that, in the embodiments of the present application, the terminal device, or the processor in the terminal device, or the chip or chip system, or a functional module, etc., can be used to monitor or not monitor the PDCCH; the network device, or the processor in the network device, or the chip or chip system, or a functional module, etc., can be used to instruct the terminal device how to monitor the PDCCH. In the following embodiments, the method for monitoring the PDCCH provided in the present application is described in detail only by taking the terminal device and the network device as examples, but it is not intended to limit the present application.

[0075] Based on the above description, a PDCCH monitoring method provided in an embodiment of the present application is applicable to Figure 1 The communication system shown. Figure 6 As shown, the specific process of the method may include:

[0076] Step 601: The network device determines first information.

[0077] In one example, the first information may be used to instruct the terminal device not to monitor the PDCCH within a preset time domain length; wherein the preset time domain length is related to a search space group for monitoring the PDCCH.

[0078] In another example, the first information may be used to indicate a search space group for monitoring the PDCCH.

[0079] In another example, the first information can be used to instruct the terminal device not to monitor the PDCCH within a preset time domain length, and to indicate the search space group for monitoring the PDCCH, wherein the preset time domain length is related to the search space group for monitoring the PDCCH. In this example, the search space group for monitoring the PDCCH related to the preset time domain length can be the search space group for monitoring the PDCCH currently monitored by the terminal device (i.e., the search space group for monitoring the PDCCH when the terminal device receives the first information), or can be the search space group for monitoring the PDCCH indicated by the first information.

[0080] Not monitoring the PDCCH may include skipping monitoring the PDCCH, stopping monitoring the PDCCH, or not performing blind detection of the PDCCH, and the like.

[0081] In an optional implementation, the network device may configure N time domain length sets and M search space groups for the terminal device, wherein each of the N time domain length sets is associated with one search space group in the M search space groups, N is an integer greater than 1 or equal to 1, and M is an integer greater than 1. For example, the network device configures two search space groups SSSG0 and SSSG1 for the terminal device, wherein the monitoring period of SSSG0 is 1 time slot, and the monitoring period of SSSG1 is 5 time slots. In addition, the network device configures two time domain length sets (i.e., two groups of skipping durations) for the terminal device, which are {2, 4} and {10, 20} (in time slots), respectively. Optionally, the M search space groups may be M non-empty search space groups, i.e., any one of the M search space groups contains at least one search space.

[0082] The preset time domain length may be one of the first time domain length set, and the first time domain length set is one of the N time domain length sets. The preset time domain length may be h time slots, or f milliseconds, etc., where h is an integer greater than or equal to 1, and f is an integer greater than or equal to 1. A search space group is associated with a time domain length set. For example, when the search space group currently used by the terminal device is SSSG0, the preset time domain length may be 2 time slots or 4 time slots, that is, SSSG0 is associated with the time domain length set {2, 4}; when the search space group currently used by the terminal device is SSSG1, the preset time domain length may be 10 time slots or 20 time slots, that is, SSSG1 is associated with the time domain length set {10, 20}.

[0083] In an exemplary embodiment, the network device may configure a set of time domain lengths corresponding to the search space group for monitoring PDCCH for the terminal device. For example, the network device sends a third information to the terminal device, and the third information is used to configure the set of time domain lengths corresponding to the search space group for monitoring PDCCH. Optionally, the network device may additionally send a fourth information to the terminal device. If the network device sends both the third information and the fourth information, the third information and the fourth information are used to jointly configure the set of time domain lengths corresponding to the search space group for monitoring PDCCH. The set of time domain lengths corresponding to each search space group includes one or more time domain lengths. When the time domain length set includes only one time domain length, it can be understood that the network device has configured a time domain length corresponding to the search space group for monitoring PDCCH for the terminal device.

[0084] Among them, the "corresponding" mentioned in this application can also be replaced by descriptions such as "related", and this application does not limit this.

[0085] In the first possible case, the search space group configuration information of the fifth search space group includes third information, and the third information includes a time domain length set, which includes one or more time domain lengths, and the preset time domain length may be one of the one or more time domain lengths included in the third information. Optionally, the fifth search space group is any one of a plurality of search space groups configured by the network device for the terminal device. In this case, the network device may include a corresponding time domain length set in the search space group configuration information of each search space group, that is, the search space group configuration information of each search space group includes one or more time domain lengths. For example, the search space group configuration information of SSSG0 includes a time domain length set {2, 4}; the search space group configuration information of SSSG1 includes a time domain length set {10, 20}. For another example, when the time domain length set includes only one time domain length, a time domain length 2 is included in the search space group configuration information of SSSG0; and a time domain length 10 is included in the search space group configuration information of SSSG1.

[0086] It should be understood that the fifth search space group is only the name of a search space group and does not refer to the number or index of the search space group. It may be the first search space group, the second search space group or the third search space group involved later.

[0087] In the first possible situation described above, the time domain length set included in the third information in the search space group configuration information of each search space group is one of the N time domain length sets described above.

[0088] In the second possible scenario, the third information may include at least one time domain length set, that is, the N time domain length sets mentioned above, specifically:

[0089] When the third information includes only one time domain length set (that is, N is 1 in this case), the M search space groups all correspond to the one time domain length set; the preset time domain length is a time domain length in the one time domain length set. For example, when the network device is configured with only one time domain length set {2, 4}, SSSG0 and SSSG1 both correspond to {2, 4}. For example, when the search space group currently used by the terminal device is SSSG0, the preset time domain length can be 2 time slots or 4 time slots, that is, SSSG0 corresponds to the time domain length set {2, 4}; when the search space group currently used by the terminal device is SSSG1, the preset time domain length can also be 2 time slots or 4 time slots, that is, SSSG1 also corresponds to the time domain length set {2, 4}.

[0090] When the third information includes M time domain length sets (that is, N is equal to M in this case), the M search space groups correspond one-to-one to the M time domain length sets, and the preset time domain length is a time domain length in the time domain length set corresponding to the search space group that monitors PDCCH. For example, when the network device is configured with the time domain length sets {2, 4} and {10, 20}, SSSG0 corresponds to {2, 4}, and SSSG1 corresponds to {10, 20}. For example, when the search space group currently used by the terminal device is SSSG0, the preset time domain length can be 2 time slots or 4 time slots, that is, SSSG0 corresponds to the time domain length set {2, 4}; when the search space group currently used by the terminal device is SSSG1, the preset time domain length can be 10 time slots or 20 time slots, that is, SSSG1 corresponds to the time domain length set {10, 20}.

[0091] When the third information includes T time domain length sets, and T is greater than 1 and T is less than M (that is, N is greater than 1 and T is less than M), each time domain length set in the T time domain length sets corresponds to one search space group in the M search space groups, and the specific correspondence is not limited in this application.

[0092] In the second case above, the third information may be included in the bandwidth part (BWP) configuration information or the cell configuration information configured by the network device for the terminal device. Optionally, one of the time domain length sets configured by the third information may be a required configuration, and the other time domain length sets may be optional configurations. For example, the time domain length set that must be configured (for example, the time domain length set {2, 4}) can be configured through the parameter skippingDurationList, which is a mandatory configuration when the network device configures the start-up skipping function; other time domain length sets that can be optionally configured (for example, the time domain length set {10, 20}) can be configured through the parameter additionalSkippingDurationList, which is an optional configuration when the network device configures the start-up skipping function.

[0093] In the third possible case, the BWP configuration information or the cell configuration information includes the third information, and the third information may include a time domain length set. Optionally, the search space group configuration information of the sixth search space group includes the fourth information, and the fourth information includes a time domain length set. Each time domain length set includes one or more time domain lengths. Optionally, the sixth search space group is any one of the multiple search space groups configured by the network device for the terminal device. When the network device configures the third information and does not configure the fourth information, the time domain length set included in the third information corresponds to the sixth search space group, and the preset time domain length may be one of the one or more time domain lengths included in the third information. When the network device configures the third information and also configures the fourth information, the time domain length set included in the fourth information corresponds to the sixth search space group, and the preset time domain length may be one of the one or more time domain lengths included in the fourth information. For example, the network device configures the third information to include a time domain length set {2, 4}, and does not configure the fourth information for SSSG0 and SSSG1, then SSSG0 and SSSG1 both correspond to {2, 4}. For example, when the search space group currently used by the terminal device is SSSG0, the preset time domain length may be 2 time slots or 4 time slots, that is, SSSG0 corresponds to the time domain length set {2, 4}; when the search space group currently used by the terminal device is SSSG1, the preset time domain length may also be 2 time slots or 4 time slots, that is, SSSG1 also corresponds to the time domain length set {2, 4}. For another example, the third information configured by the network device includes a time domain length set {2, 4}, and the fourth information configured in the configuration information of SSSG1 includes a time domain length set {10, 20}, and the fourth information is not configured for SSSG0, then SSSG0 corresponds to the time domain length set {2, 4}, and SSSG1 corresponds to the time domain length set {10, 20}. For example, when the search space group currently used by the terminal device is SSSG0, the preset time domain length can be 2 time slots or 4 time slots, that is, SSSG0 corresponds to the time domain length set {2, 4}; when the search space group currently used by the terminal device is SSSG1, the preset time domain length can be 10 time slots or 20 time slots, that is, SSSG1 corresponds to the time domain length set {10, 20}.

[0094] The solution of the third case above can be understood as that the time domain length set configured by the third information is mandatory, and the time domain length set configured by the fourth information is optional. When the network device does not expect to accurately control the preset time domain lengths corresponding to different search space groups, only the third information (for example, the time domain length set {2, 4}) can be configured. When the network device expects to accurately control the preset time domain length corresponding to a certain search space group, a dedicated time domain length set (for example, the time domain length set {10, 20}) can be configured in the search space group through the fourth information.

[0095] The solution of the third case above can also be understood as the time domain length set configured by the fourth information having a higher priority than the time domain length set configured by the third information.

[0096] The solution of the third case mentioned above can also be understood as: when the network device is configured with the fourth information, the time domain length set configured by the fourth information can replace / override / overwrite the time domain length set configured by the third information.

[0097] It should be understood that the sixth search space group is only the name of a search space group and does not refer to the number or index of the search space group. It may be the first search space group, the second search space group or the third search space group involved later.

[0098] The above three situations configure a corresponding time domain length set for each search space group. Further, the preset time domain length is specifically which one of the corresponding time domain length sets is determined by the first information. In the above second situation, the network device can control whether to enable the function of "different SSSGs correspond to different time domain lengths" by whether to configure M time domain length sets, so that the network device configuration skipping monitoring PDCCH is more flexible.

[0099] In another optional implementation, the preset time domain length may be an integer multiple of the monitoring period of the search space group that the terminal device currently monitors the PDCCH. For example, the preset time domain length may be 2 or 4 monitoring periods. For example, when the search space group currently used by the terminal device is SSSG0 (the monitoring period is 1 time slot), the preset time domain length may be 2×1=2 time slots or 4×1=4 time slots; when the search space group currently used by the terminal device is SSSG1 (the monitoring period is 5 time slots), the preset time domain length may be 2×5=10 time slots or 4×5=20 time slots.

[0100] In one example, the monitoring period of the search space group may be a preset period, and the preset period is independent of a period of a search space (search space set, SSS) included in the search space group.

[0101] Optionally, when the monitoring period of the search space group is a preset period, the monitoring period of the search space group can be preset by the following method: the network device sends second information to the terminal device, and the second information is used to configure the monitoring period of the search space group for monitoring the PDCCH. Further optionally, the network device can additionally send fifth information to the terminal device, and if the network device sends both the second information and the fifth information, the second information and the fifth information are used to jointly configure the monitoring period of the search space group for monitoring the PDCCH.

[0102] In a first possible manner, the search space group configuration information of the fourth search space group includes second information, and the second information includes a monitoring period of the fourth search space group. Optionally, the fourth search space group is any one of a plurality of search space groups configured by the network device for the terminal device. In this manner, the network device may include a corresponding monitoring period of the search space group in the search space group configuration information of each search space group. For example, the search space group configuration information of SSSG0 includes a monitoring period #1 of the search space group, which has a length of 1 time slot, in which case the preset time domain length may be 2×1=2 time slots or 4×1=4 time slots; the search space group configuration information of SSSG1 includes a monitoring period #2 of the search space group, which has a length of 5 time slots, in which case the preset time domain length may be 2×5=10 time slots or 4×5=20 time slots.

[0103] It should be understood that the fourth search space group is only the name of a search space group and does not refer to the number or index of the search space group. It may be the first search space group, the second search space group or the third search space group involved later.

[0104] In a second possible manner, the second information includes at least one monitoring period, specifically:

[0105] When the second information only includes the monitoring period of one search space group, the monitoring periods of the M search space groups are all the monitoring periods of the one search space group. For example, when the network device is configured with only one monitoring period, that is, the network device is configured with only the monitoring period of the search space group as monitoring period #1, the monitoring periods of SSSG0 and SSSG1 are both the monitoring period #1 of the search space group. If the preset time domain length can be the monitoring period of 2 or 4 search space groups, and the length of the monitoring period #1 of the search space group is 1 time slot, then regardless of whether the search space group currently used by the terminal device is SSSG0 or SSSG1, the preset time domain length can be 2×1=2 time slots or 4×1=4 time slots.

[0106] When the second information includes monitoring periods of M search space groups, the M search space groups correspond one to one with the monitoring periods of the M search space groups. For example, when the network device configures the monitoring period #1 of the search space group and the monitoring period #2 of the search space group, the monitoring period of SSSG0 can be the monitoring period #1 of the search space group, and the monitoring period of SSSG1 can be the monitoring period #2 of the search space group. Exemplarily, if the preset time domain length can be 2 or 4 monitoring periods, when the search space group currently used by the terminal device is SSSG0 (the monitoring period of the search space group is 1 time slot), the preset time domain length can be 2×1=2 time slots or 4×1=4 time slots; when the search space group currently used by the terminal device is SSSG1 (the monitoring period of the search space group is 5 time slots), the preset time domain length can be 2×5=10 time slots or 4×5=20 time slots.

[0107] When the second information includes monitoring periods of T search space groups, and T is greater than 1 and T is less than M, each monitoring period of the T search space groups corresponds to one search space group of the M search space groups, and the specific corresponding relationship is not limited in this application.

[0108] In the above-mentioned second possible manner, the second information may be included in the bandwidth part configuration information or the cell configuration information configured by the network device for the terminal device. Optionally, among the monitoring periods of the search space groups configured by the second information, one monitoring period of the search space group may be required to be configured, and the monitoring periods of other search space groups may be optional. For example, the monitoring period of the search space group that must be configured (for example, the monitoring period #1 of the search space group) can be configured by the parameter default monitoring period (defaultMonitoringPeriodicity), which is a mandatory configuration when the network device configures the start-up skip function; the monitoring period of other search space groups that can be optionally configured (for example, the monitoring period #2 of the search space group) can be configured by the parameter additional monitoring period (additionalMonitoringPeriodicity), which is an optional configuration when the network device configures the start-up skip function.

[0109] In the third possible case, the BWP configuration information or the cell configuration information includes the second information, and the second information may include a monitoring period of a search space group. Optionally, the search space group configuration information of the seventh search space group includes the fifth information, and the fifth information includes a monitoring period of a search space group. Optionally, the seventh search space group is any one of the multiple search space groups configured by the network device for the terminal device. When the network device configures the second information and does not configure the fifth information, the monitoring period of the search space group included in the second information corresponds to the seventh search space group, and the preset time domain length may be an integer multiple of the monitoring period of the search space group included in the second information. When the network device configures the second information and also configures the fifth information, the monitoring period of the search space group included in the fifth information corresponds to the seventh search space group, and the preset time domain length may be an integer multiple of the monitoring period of the search space group included in the fifth information. For example, the network device configures the monitoring period #1 of the search space group through the second information, and does not configure the fifth information for SSSG0 and SSSG1. The monitoring period of SSSG0 may be the monitoring period #1 of the search space group, and the monitoring period of SSSG1 may also be the monitoring period #1 of the search space group. Exemplarily, if the length of the monitoring period #1 of the search space group is 1 time slot, the preset time domain length may be 2 or 4 monitoring periods, regardless of whether the search space group currently used by the terminal device is SSSG0 or SSSG1, the preset time domain length may be 2×1=2 time slots or 4×1=4 time slots. For another example, the network device configures the monitoring period #1 of the search space group through the second information, does not configure the fifth information for SSSG0, and configures the monitoring period #2 of the search space group for SSSG1 through the fifth information. Then the monitoring period of SSSG0 may be the monitoring period #1 of the search space group, and the monitoring period of SSSG1 may be the monitoring period #2 of the search space group. Exemplarily, if the length of monitoring period #1 of the search space group is 1 time slot, and the length of monitoring period #2 of the search space group is 5 time slots, the preset time domain length may be 2 or 4 monitoring periods. When the search space group currently used by the terminal device is SSSG0, the preset time domain length may be 2×1=2 time slots or 4×1=4 time slots; when the search space group currently used by the terminal device is SSSG1, the preset time domain length may be 2×5=10 time slots or 4×5=20 time slots.

[0110] The solution for the third case above can be understood as that the monitoring period of the search space group configured by the second information is mandatory, and the monitoring period of the search space group configured by the fifth information is optional. When the network device does not expect to accurately control the preset time domain lengths corresponding to different search space groups, only the second information (for example, the monitoring period #1 of the search space group) can be configured. When the network device expects to accurately control the preset time domain length corresponding to a certain search space group, a dedicated monitoring period of the search space group (for example, the monitoring period #2 of the search space group) can be configured in the search space group through the fifth information.

[0111] The solution of the third case above can also be understood as that the monitoring period priority of the search space group configured by the fifth information is higher than the monitoring period of the search space group configured by the second information.

[0112] The solution of the third case mentioned above can also be understood as: when the network device is configured with the fifth information, the monitoring period of the search space group configured by the fifth information can replace / override / overwrite the monitoring period of the search space group configured by the second information.

[0113] It should be understood that the seventh search space group is only the name of a search space group and does not refer to the number or index of the search space group. It may be the first search space group, the second search space group or the third search space group involved later.

[0114] In the third case above,

[0115] The above three situations configure the monitoring period of the corresponding search space group for each search space group. Furthermore, the preset time domain length is specifically a multiple of the monitoring period of the corresponding search space group determined by the first information. In the above second possible method, the network device can control whether to enable the function of "different SSSGs correspond to different time domain lengths" by whether to configure the monitoring period of M search space groups, so that the network device configuration skipping monitoring PDCCH is more flexible.

[0116] In another example, the monitoring period of the search space group is a first monitoring period, and the first monitoring period is related to the period of the search space included in the search space group, wherein the first monitoring period may include the following three situations:

[0117] Case a1: the first monitoring period is the largest monitoring period or the smallest monitoring period among the monitoring periods of at least one search space included in the search space group.

[0118] Case a2: The first monitoring period is the monitoring period of the search space in which the terminal device currently receives downlink control information (such as DCI).

[0119] Case a3: The first monitoring period is the largest monitoring period or the smallest monitoring period among the monitoring periods of multiple search spaces when the terminal device receives downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among the multiple search spaces, or the monitoring period of the search space with the smallest index value among the multiple search spaces.

[0120] Accordingly, the starting position of the preset time domain length is the first time domain position, and the first time domain position can have the following three situations:

[0121] Case b1: The first time domain position is the time slot in which the terminal device receives downlink control information.

[0122] Case b2: the first time domain position is the time slot next to the time slot in which the terminal device receives the downlink control information.

[0123] Case b3: When the first monitoring period is the maximum monitoring period or the minimum monitoring period among the monitoring periods of at least one search space included in the search space group, the first time domain position is the monitoring PDCCH position of the search space with the next maximum monitoring period or minimum monitoring period of the search space corresponding to the first monitoring period.

[0124] Step 602: The network device sends first information to the terminal device.

[0125] In an optional implementation, the first information may be carried in the DCI sent by the network device to the terminal device, that is, the first information may be a field in the DCI.

[0126] The terminal device performs corresponding operations according to different instructions of the first information. Specifically, when the first information is used to indicate that the terminal device does not monitor PDCCH within a preset time domain length, the terminal device can perform the following steps 603a; when the first information is used to indicate the search space group for monitoring PDCCH, the terminal device can perform the following steps 603b; when the first information is used to indicate that the terminal device does not monitor PDCCH within a preset time domain length, and indicates the search space group for monitoring PDCCH, the terminal device can perform the following steps 603c.

[0127] Step 603a: The terminal device does not monitor the PDCCH within a preset time domain length according to the first information.

[0128] Step 603b: The terminal device monitors the PDCCH according to the search space group indicated by the first information.

[0129] Step 603c: The terminal device monitors the PDCCH according to the search space group indicated by the first information and does not monitor the PDCCH within a preset time domain length.

[0130] Exemplarily, when the first information is a first value, the first information can be used to instruct the terminal device not to monitor PDCCH within a preset time domain length; when the first information is a second value, the first information can be used to indicate the search space group for monitoring PDCCH; when the first information is a third value, the first information can be used to instruct the terminal device not to monitor PDCCH within a preset time domain length, and to indicate the search space group for monitoring PDCCH.

[0131] Specifically, the first information may include A bits, and different values ​​of the A bits may correspond to different time domain lengths for not monitoring PDCCH, and / or different search space groups for monitoring PDCCH; A is an integer greater than or equal to 2.

[0132] In an optional implementation, the A bits included in the first information can be divided into two indication fields for independent indication. For example, the first information can include a first indication field and a second indication field. Optionally, the first indication field can be the first bit of the A bits (which can be called a flag bit), and the first indication field indicates that the terminal device skips PDCCH monitoring or instructs the terminal device to switch the search space group through the first bit of the A bits. The second indication field is the other A-1 bits of the A bits except the first bit. When the first indication field instructs the terminal device to skip PDCCH monitoring, the second indication field indicates that the terminal device does not monitor PDCCH within the first time domain length through A-1 bits, that is, the second indication field indicates that the time domain length for not monitoring PDCCH is the first time domain length through A-1 bits; wherein the specific value of the first time domain length is indicated by the value of the A-1 bits included in the second indication field. When the first indication field indicates that the terminal device switches the search space group, the second indication field indicates that the terminal device monitors PDCCH according to the first search space group through A-1 bits, that is, the second indication field indicates that the search space group that the terminal device monitors PDCCH is the first search space group through A-1 bits; wherein the first search space group is a specific search space group, for example, the first search space group may be SSSG0 or SSSG1. Of course, there may be other ways to allocate the first indication field and the second indication field in the A bits of the first information, which is not limited in this application.

[0133] It should be noted that the instructing the terminal device to switch the search space group involved in the present application may specifically mean instructing the terminal device to switch to another search space group, or instructing the terminal device to keep the current search space group unchanged. That is, when the search space group indicated when instructing the terminal device to switch the search space group is different from the current search space group of the terminal device, it means instructing the terminal device to switch to another search space group; when the search space group indicated when instructing the terminal device to switch the search space group is the same as the current search space group of the terminal device, it means instructing the terminal device to keep the current search space group unchanged. For example, when the search space group indicated when instructing the terminal device to switch the search space group is SSSG1, and the current search space group of the terminal device is SSSG0, it means instructing the terminal device to switch to SSSG0. For another example, when the search space group indicated when instructing the terminal device to switch the search space group is SSSG1, and the current search space group of the terminal device is SSSG1, it means instructing the terminal device to keep SSSG1 unchanged.

[0134] Exemplarily, when the first indication field is a first value, the second indication field is used to indicate that the terminal device does not monitor PDCCH within a first time domain length, wherein the first time domain length is related to the search space group that the terminal device currently monitors PDCCH, and the preset time domain length at this time is the first time domain length; when the first indication field is a second value, the second indication field is used to indicate that the terminal device monitors PDCCH according to the first search space group. That is, when the first indication field is a first value, the first indication field indicates that the terminal device skips PDCCH monitoring, and when the first indication field is a second value, the first indication field indicates that the terminal device switches the search space group. Among them, when the first indication field is a first value, the value of the second indication field is different, and the indicated first time domain length is different; when the first indication field is a second value, the value of the second indication field is different, and the indicated first search space group is different.

[0135] For example, the network device configures SSSG0 (monitoring period is 1 time slot) and SSSG1 (monitoring period is 5 time slots) for the terminal device. At the same time, the network device configures two time domain length sets for the terminal device, which are {2, 4} time slots and {10, 20} time slots respectively. The first time domain length can be one of the two time domain length sets {2, 4} and {10, 20}, and the first search space can be one of SSSG0 and SSSG1. Assuming that the first information includes 2 bits, the first bit is the first indication field, and the second bit is the second indication field, an example of the first information indicating the first time domain length and / or the first search space group can be shown in Table 1 below:

[0136] Table 1

[0137]

[0138]

[0139] It can be seen from the above Table 1 that when the first information includes two bits, the first indication field is the first value, that is, the first bit is 0, and the first indication field is the second value, that is, the first bit is 1. When the first bit is 0, the second indication field is used to indicate that the terminal device monitors the first search space group of PDCCH. Specifically, when the second indication field is 0, it indicates that the first search space group of PDCCH monitored by the terminal device is SSSG0, and when the second indication field is 1, it indicates that the first search space group of PDCCH monitored by the terminal device is SSSG1. When the first bit is 1, the second indication field is used to indicate that the terminal device does not monitor the first time domain length of PDCCH. Specifically, when the second indication field is 1, the first time domain length indicated is the first length, and the first length is related to the search space group of PDCCH currently monitored by the terminal device; when the second indication field is 0, the first time domain length indicated is the second length, and the second length is related to the search space group of PDCCH currently monitored by the terminal device.

[0140] It should be noted that the indication conditions shown in Table 1 are only examples and are not intended to limit the present application. For example, when the first bit is 0, it indicates SSSG switching, when the second indication field (i.e., the second bit) is 0, it indicates SSSG1, and when it is 1, it indicates SSSG0; when the first bit is 1, it indicates skipping PDCCH, when the second indication field is 1, it indicates the second length, and when it is 0, it indicates the first length. For another example, when the first bit is 0, it indicates skipping PDCCH, and when the first bit is 1, it indicates SSSG switching, and then the second indication field indicates the corresponding indication, which will not be listed in detail here. Of course, there may be other indication conditions, which will not be listed here one by one.

[0141] It should be noted that the example in Table 1 shows an example in which the network device configures two time domain length sets {2, 4} time slots and {10, 20} time slots through the third information, and the two time domain length sets correspond to SSSG0 and SSSG1 respectively. In an exemplary case, the network device can configure only one time domain length set through the third information, and the one time domain length set corresponds to all search space groups. For example, the network device configures the time domain length set {2, 4} time slots, and SSSG0 and SSSG1 both correspond to {2, 4}. At this time, assuming that the first information includes 2 bits, the first bit is the first indication field, and the second bit is the second indication field, the example of the first information indicating the first time domain length and / or the first search space group can be shown in the following Table 1a:

[0142] Table 1a

[0143]

[0144] The principles of Table 1a and Table 1 are the same, and the specific descriptions can refer to each other, and Table 1a will not be described in detail here. It should be noted that the example of Table 1a is different from the example of Table 1 in that SSSG0 and SSSG1 in Table 1a correspond to the same time domain length set, while SSSG0 and SSSG1 in Table 1 correspond to different time domain length sets.

[0145] In another exemplary case, the network device configures a time domain length set through third information, and the third information is included in the BWP configuration information or the cell configuration information. The network device may also choose to configure a time domain length set through fourth information, and the fourth information is included in the configuration information of the search space group. In this case, when the network device only configures the third information and does not configure the fourth information, a time domain length set included in the third information corresponds to all search space groups. For example, the network device configures a time domain length set of {2, 4} time slots through the third information, and SSSG0 and SSSG1 both correspond to {2, 4}. At this time, assuming that the first information includes 2 bits, the first bit is the first indication field, and the second bit is the second indication field, an example of the first information indicating the first time domain length and / or the first search space group can be shown in Table 1a. When the network device is configured with the third information, and the fourth information is configured in the configuration information of SSSG1 including a time domain length set {10, 20} time slots, and the fourth information is not configured for SSSG0, the time domain length set included in the third information corresponds to SSSG0, and the time domain length set included in the fourth information corresponds to SSSG1. At this time, assuming that the first information includes 2 bits, the first bit is the first indication field, and the second bit is the second indication field, an example of the first information indicating the first time domain length and / or the first search space group can be shown in Table 1. For another example, the network device configures SSSG0 (monitoring period is 1 time slot) and SSSG1 (monitoring period is 5 time slots) for the terminal device. When the preset time domain length can be an integer multiple of the monitoring period of the search space group of the current monitoring PDCCH of the terminal device, the first time domain length can be 2 times (i.e., 2 monitoring periods) or 4 times (i.e., 4 monitoring periods) the period of the SSSG currently monitoring the PDCCH. The first search space can be one of SSSG0 and SSSG1. Assuming that the first information includes 2 bits, the first bit is the first indication field, and the second bit is the second indication field, an example of the first information indicating the first time domain length and / or the first search space group may be shown in the following Table 2:

[0146] Table 2

[0147]

[0148] It can be seen from the above Table 2 that when the first information includes two bits, the first indication field is the first value, that is, the first bit is 0, and the first indication field is the second value, that is, the first bit is 1. When the first bit is 0, the second indication field is used to indicate that the terminal device monitors the first search space group of PDCCH. Specifically, when the second indication field is 0, it indicates that the first search space group of PDCCH monitored by the terminal device is SSSG0, and when the second indication field is 1, it indicates that the first search space group of PDCCH monitored by the terminal device is SSSG1. When the first bit is 1, the second indication field is used to indicate that the terminal device does not monitor the first time domain length of PDCCH. Specifically, when the second indication field is 1, the first time domain length indicated is 2 monitoring periods, and the specific time domain length corresponding to the 2 monitoring periods (that is, several time slots, etc.) is related to the search space group of PDCCH currently monitored by the terminal device; when the second indication field is 0, the first time domain length indicated is 4 monitoring periods, and the specific time domain length corresponding to the 2 monitoring periods is related to the search space group of PDCCH currently monitored by the terminal device.

[0149] It should be noted that the indication conditions shown in Table 2 are only examples and are not intended to limit the present application. For example, when the first bit is 0, it indicates SSSG switching, when the second indication field (i.e., the second bit) is 0, it indicates SSSG1, and when it is 1, it indicates SSSG0; when the first bit is 1, it indicates skipping PDCCH, when the second indication field is 1, it indicates 4 monitoring cycles, and when it is 0, it indicates 2 monitoring cycles. For another example, when the first bit is 0, it indicates skipping PDCCH, and when the first bit is 1, it indicates SSSG switching, and then the second indication field indicates the corresponding indication, which will not be listed in detail here. Of course, there may be other indication conditions, which will not be listed here one by one.

[0150] It should be noted that the example in Table 2 shows an example in which the network device configures two monitoring periods (1 time slot and 5 time slots, respectively) through the second information, and the two monitoring periods correspond to SSSG0 and SSSG1, respectively. In an exemplary case, the network device may configure only one monitoring period through the second information, and the one monitoring period corresponds to all search space groups. For example, the network device configures a monitoring period with a length of 1 time slot, and SSSG0 and SSSG1 both correspond to a monitoring period with a length of 1 time slot. At this time, assuming that the first information includes 2 bits, the first bit is the first indication field, and the second bit is the second indication field, the example of the first information indicating the first time domain length and / or the first search space group can be shown in the following Table 2a:

[0151] Table 2a

[0152]

[0153] The principles of Table 2a and Table 2 are the same, and the specific descriptions can refer to each other, and Table 2a will not be described in detail here. It should be noted that the example of Table 2a is different from the example of Table 2 in that SSSG0 and SSSG1 in Table 2a correspond to the same monitoring period, while SSSG0 and SSSG1 in Table 2 correspond to different monitoring periods.

[0154] In another exemplary case, the network device configures a monitoring period through the second information, and the second information is included in the BWP configuration information or the cell configuration information. The network device may also choose to configure a monitoring period through the fifth information, and the fifth information is included in the configuration information of the search space group. In this case, when the network device only configures the second information and does not configure the fifth information, a monitoring period included in the second information corresponds to all search space groups. For example, the network device configures the length of the monitoring period to be 1 time slot through the second information. At this time, assuming that the first information includes 2 bits, the first bit is the first indication domain, and the second bit is the second indication domain, the example of the first information indicating the first time domain length and / or the first search space group can be shown in Table 2a. When the network device configures the second information, and configures the fifth information in the configuration information of SSSG1 to include a monitoring period (length of 5 time slots), and the fifth information is not configured for SSSG0, the monitoring period included in the second information corresponds to SSSG0, and the monitoring period included in the fifth information corresponds to SSSG1. At this time, assuming that the first information includes 2 bits, the first bit is the first indication field, and the second bit is the second indication field, an example of the first information indicating the first time domain length and / or the first search space group can be shown in Table 2.

[0155] In another optional implementation, the A bits included in the first information may jointly indicate that the terminal device does not monitor the PDCCH within a preset time domain length, and / or indicate the search space group for monitoring the PDCCH. That is, the skipping of PDCCH and the SSSG switching are jointly encoded (joint encoding) by indicating 2 A bit states, each bit state corresponds to a time domain length for not monitoring the PDCCH, and / or a search space group for monitoring the PDCCH.

[0156] For example, the network device configures SSSG0 (monitoring period is 1 time slot) and SSSG1 (monitoring period is 5 time slots) for the terminal device. At the same time, the network device configures two time domain length sets for the terminal device, which are {2, 4} time slots and {10, 20} time slots. Among them, the time domain length set {2, 4} is related to SSSG0, and the time domain length set {10, 20} is related to SSSG1. Assume that the first information includes 2 bits, and the 2 bits have 4 bit states. The first information indicates that the time domain length of PDCCH is not monitored through 4 bit states, and / or, an example of a search space group for monitoring PDCCH can be shown in Table 3 below:

[0157] Table 3

[0158]

[0159] It can be seen from Table 3 above that when the first information includes 2 bits, when the bit state of the 2 bits is 00, it indicates that the search space group for monitoring PDCCH by the terminal device is SSSG0 (that is, it indicates that the terminal device switches to SSSG0, wherein, if the current search space group of the terminal device is SSSG0, it indicates that the terminal device keeps the search space group SSSG0 unchanged, and if the current search space group of the terminal device is not SSSG0, it indicates that the terminal device switches from other search space groups to SSSG0); when the bit state of the 2 bits is 01, it indicates that the search space group for monitoring PDCCH by the terminal device is SSSG1 (that is, it indicates that the terminal device switches to SSSG1 , wherein, if the current search space group of the terminal device is SSSG1, it indicates that the terminal device keeps the search space group SSSG1 unchanged; if the current search space group of the terminal device is not SSSG1, it indicates that the terminal device switches from other search space groups to SSSG1); when the bit state of 2 bits is 11, it indicates that the preset time domain length for not monitoring PDCCH of the terminal device is the first length, and the first length is related to the search space group for which the terminal device currently monitors PDCCH; when the bit state of 2 bits is 10, it indicates that the preset time domain length for not monitoring PDCCH of the terminal device is the second length, and the second length is related to the search space group for which the terminal device currently monitors PDCCH.

[0160] It should be noted that the indication conditions shown in Table 3 are only examples and are not intended to limit the present application. For example, when the bit state of 2 bits is 00, the search space group for indicating the terminal device to monitor PDCCH is SSSG1; when the bit state of 2 bits is 01, the search space group for indicating the terminal device to monitor PDCCH is SSSG0; when the bit state of 2 bits is 10, the preset time domain length for indicating the terminal device not to monitor PDCCH is the first length; when the bit state of 2 bits is 11, the preset time domain length for indicating the terminal device not to monitor PDCCH is the second length. Of course, there may be other indication conditions, which are not listed here one by one.

[0161] It should be noted that the example in Table 3 shows that the network device configures two time domain length sets {2, 4} time slots and {10, 20} time slots through the third information, and the two time domain length sets correspond to SSSG0 and SSSG1 respectively. In an exemplary case, the network device may configure only one time domain length set through the third information, and the one time domain length set corresponds to all search space groups. For example, the network device configures the time domain length set {2, 4} time slots, and SSSG0 and SSSG1 both correspond to {2, 4}. At this time, assuming that the first information includes 2 bits, the 2 bits have a total of 4 bit states, and the first information indicates that the time domain length of PDCCH is not monitored through 4 bit states, and / or, an example of monitoring the search space group of PDCCH can be shown in the following Table 3a:

[0162] Table 3a

[0163]

[0164] The principles of Table 3a and Table 3 are the same, and the specific descriptions can refer to each other, and Table 3a will not be described in detail here. It should be noted that the example of Table 3a is different from the example of Table 3 in that SSSG0 and SSSG1 in Table 3a correspond to the same time domain length set, while SSSG0 and SSSG1 in Table 3 correspond to different time domain length sets.

[0165] In another exemplary case, the network device configures a time domain length set through third information, and the third information is included in the BWP configuration information or the cell configuration information. The network device may also choose to configure a time domain length set through fourth information, and the fourth information is included in the configuration information of the search space group. In this case, when the network device only configures the third information and does not configure the fourth information, a time domain length set included in the third information corresponds to all search space groups. For example, the network device configures a time domain length set of {2, 4} time slots through the third information, and SSSG0 and SSSG1 both correspond to {2, 4}. At this time, it is assumed that the first information includes 2 bits, and the 2 bits have a total of 4 bit states. The first information indicates that the time domain length of PDCCH is not monitored through 4 bit states, and / or, an example of a search space group for monitoring PDCCH can be shown in Table 3a. When the network device is configured with the third information, and the fourth information is configured in the configuration information of SSSG1 to include a time domain length set {10, 20} time slots, and the fourth information is not configured for SSSG0, the time domain length set included in the third information corresponds to SSSG0, and the time domain length set included in the fourth information corresponds to SSSG1. At this time, it is assumed that the first information includes 2 bits, and the 2 bits have 4 bit states. The first information indicates that the time domain length of the PDCCH is not monitored through the 4 bit states, and / or an example of the search space group for monitoring the PDCCH can be shown in Table 3.

[0166] For another example, the network device configures SSSG0 (monitoring period is 1 time slot) and SSSG1 (monitoring period is 5 time slots) for the terminal device. When the preset time domain length is an integer multiple of the monitoring period of the search space group of the PDCCH currently monitored by the terminal device, such as 2 times (i.e. 2 monitoring periods) or 4 times (i.e. 4 monitoring periods) the period of the SSSG currently monitoring the PDCCH. Assume that the first information includes 2 bits, and the 2 bits have 4 bit states. The first information indicates the time domain length of not monitoring the PDCCH through 4 bit states, and / or, an example of monitoring the search space group of the PDCCH can be shown in Table 4 below:

[0167] Table 4

[0168]

[0169]

[0170] It can be seen from Table 4 above that when the first information includes 2 bits, when the bit state of the 2 bits is 00, it indicates that the search space group for monitoring PDCCH by the terminal device is SSSG0 (that is, it indicates that the terminal device switches to SSSG0, wherein, if the current search space group of the terminal device is SSSG0, it indicates that the terminal device keeps the search space group SSSG0 unchanged, and if the current search space group of the terminal device is not SSSG0, it indicates that the terminal device switches from other search space groups to SSSG0); when the bit state of the 2 bits is 01, it indicates that the search space group for monitoring PDCCH by the terminal device is SSSG1 (that is, it indicates that the terminal device switches to SSSG1, wherein, if the current search space group of the terminal device is SSSG 1, it indicates that the terminal device keeps the search space group SSSG1 unchanged. If the current search space group of the terminal device is not SSSG1, it indicates that the terminal device switches from other search space groups to SSSG1); when the bit state of 2 bits is 11, it indicates that the preset time domain length for indicating that the terminal device does not monitor PDCCH is 2 monitoring periods, and the specific time domain length corresponding to the 2 monitoring periods (that is, several time slots, etc.) is related to the search space group for which the terminal device currently monitors PDCCH; when the bit state of 2 bits is 10, it indicates that the preset time domain length for indicating that the terminal device does not monitor PDCCH is 4 monitoring periods, and the specific time domain length corresponding to the 4 monitoring periods (that is, several time slots, etc.) is related to the search space group for which the terminal device currently monitors PDCCH.

[0171] It should be noted that the indication conditions shown in Table 4 are only examples and are not intended to limit the present application. For example, when the bit state of 2 bits is 00, the search space group for indicating the terminal device to monitor PDCCH is SSSG0; when the bit state of 2 bits is 01, the search space group for indicating the terminal device to monitor PDCCH is SSSG1; when the bit state of 2 bits is 10, the preset time domain length for indicating that the terminal device does not monitor PDCCH is 4 monitoring cycles; when the bit state of 2 bits is 11, the preset time domain length for indicating that the terminal device does not monitor PDCCH is 2 monitoring cycles. Of course, there may be other indication conditions, which are not listed here one by one.

[0172] It should be noted that the example in Table 4 shows an example in which the network device configures two monitoring periods (1 time slot and 5 time slots, respectively) through the second information, and the two monitoring periods correspond to SSSG0 and SSSG1, respectively. In an exemplary case, the network device may configure only one monitoring period through the second information, and the one monitoring period corresponds to all search space groups. For example, the network device configures a monitoring period of 1 time slot, and SSSG0 and SSSG1 both correspond to a monitoring period of 1 time slot in length. At this time, it is assumed that the first information includes 2 bits, and the 2 bits have a total of 4 bit states. The first information indicates that the time domain length of the PDCCH is not monitored through 4 bit states, and / or, an example of a search space group for monitoring the PDCCH can be shown in the following Table 4a:

[0173] Table 4a

[0174]

[0175]

[0176] The principles of Table 4a and Table 4 are the same, and the specific descriptions can refer to each other, and Table 4a will not be described in detail here. It should be noted that the example of Table 4a is different from the example of Table 4 in that SSSG0 and SSSG1 in Table 4a correspond to the same monitoring period, while SSSG0 and SSSG1 in Table 4 correspond to different monitoring periods.

[0177] In another exemplary case, the network device configures a monitoring period through the second information, and the second information is included in the BWP configuration information or the cell configuration information. The network device may also choose to configure a monitoring period through the fifth information, and the fifth information is included in the configuration information of the search space group. In this case, when the network device only configures the second information and does not configure the fifth information, a monitoring period included in the second information corresponds to all search space groups. For example, the network device configures the length of the monitoring period to be 1 time slot through the second information. At this time, it is assumed that the first information includes 2 bits, and the 2 bits have 4 bit states. The first information indicates that the time domain length of the PDCCH is not monitored through 4 bit states, and / or an example of the search space group for monitoring the PDCCH can be shown in Table 4a. When the network device configures the second information, and the fifth information is configured in the configuration information of SSSG1 to include a monitoring period (with a length of 5 time slots), and the fifth information is not configured for SSSG0, the monitoring period included in the second information corresponds to SSSG0, and the monitoring period included in the fifth information corresponds to SSSG1. At this time, it is assumed that the first information includes 2 bits, and the 2 bits have 4 bit states. The first information indicates the time domain length of not monitoring PDCCH through the 4 bit states, and / or, an example of the search space group for monitoring PDCCH can be shown in Table 4.

[0178] In Table 3 and Table 4 above, each bit state of the A bits of the first information indicates the time domain length of not monitoring the PDCCH, or the search space group of monitoring the PDCCH. A At least one of the bit states may simultaneously indicate a time domain length for not monitoring the PDCCH and a search space group for monitoring the PDCCH.

[0179] For example, the network device configures SSSG0 (monitoring period is 1 time slot) and SSSG1 (monitoring period is 5 time slots) for the terminal device. At the same time, the network device configures 4 time domain lengths D1 to D4 for the terminal device. Assuming that the first information includes 2 bits, there are 4 bit states in total. The first information indicates the time domain length of not monitoring PDCCH through 4 bit states, and / or, an example of the search space group for monitoring PDCCH can be shown in Table 5 below:

[0180] Table 5

[0181]

[0182] As can be seen in Table 5, when the bit state of the 2 bits of the first information is 00, it means that the terminal device will skip (skip) the PDCCH monitoring within the time domain length of D1, and after skipping the PDCCH monitoring, it will monitor SSSG0 (that is, monitor PDCCH according to SSSG0). It can also be understood that the terminal device first switches to monitoring SSSG0, and then skips the PDCCH monitoring within the time domain length of D1. The same is true when the bit state of the 2 bits of the first information is 01, 10 or 11, which will not be explained in detail here.

[0183] It should be noted that the situations indicated by the various bit statuses in Table 5 are merely examples, and there may be other situations, which will not be described in detail here.

[0184] In the above Table 5, each bit state indicates both SSSG switching and skipping PDCCH. Exemplarily, only some of the bit states in the first information may correspond to SSSG switching and skipping PDCCH, and the other bit states may correspond to only one of SSSG switching and skipping PDCCH, as shown in Table 6.

[0185] Table 6

[0186]

[0187] It should be noted that the situations indicated by the bit states in Table 6 are only examples, and there may be other situations, for example, when the bit state is 00, it corresponds to SSSG0+ skipping D1; when the bit state is 01, it corresponds to skipping D2, etc. Of course, there may be many other situations, which are not listed here one by one.

[0188] In one implementation, when the first information only indicates the search space group for monitoring PDCCH, the value of A bits of the first information may also correspond to a search space group and a time domain length, but the corresponding time domain length is 0. Exemplarily, when the first information indicates the second search space group, the value of A bits may correspond to the second search space group and the second time domain length, and the second time domain length is 0. That is, by configuring the value of the preset time domain length to 0, it is possible to only indicate the search space group for monitoring PDCCH, that is, to only perform SSSG switching without skipping PDCCH. As shown in Table 7 below, when the value of the first information (that is, the bit state) is 01, it indicates that the first information only indicates monitoring PDCCH according to SSSG0, and does not skip PDCCH monitoring; when the value of the first information (that is, the bit state) is 11, it indicates that the first information only indicates monitoring PDCCH according to SSSG1, and does not skip PDCCH monitoring.

[0189] Table 7

[0190]

[0191] It can be seen from Table 7 that when the bit state of the first information is 01, although it corresponds to SSSG0+skipping D2 (that is, the second search space group and the second time domain length corresponding to the values ​​of A bits are SSSG0 and D2 at this time), D2 is configured to be 0 (that is, the second time domain length is 0), that is to say, the first information only indicates SSSG0 (that is, the first information indicates the second search space group); the same is true when the bit state of the first information is 11.

[0192] In an exemplary embodiment, when the monitoring period of the search space group is small, when the terminal device monitors PDCCH according to the search space group, the terminal device has relatively more opportunities to monitor PDCCH, and the power consumption of the terminal device is relatively wasted. At this time, when the network device does not schedule the terminal device, the PDCCH monitoring can be reduced by skipping PDCCH, thereby achieving energy saving. However, when the monitoring period of the search space group itself is large, when the terminal device monitors PDCCH according to the search space group, the terminal device has relatively fewer opportunities to monitor PDCCH, and the power consumption of the terminal device itself is relatively wasted. In some cases, for example, when the monitoring period is large, such as monitoring PDCCH once every 10 time slots or every 20 time slots, even if the skipping PDCCH method is not combined, a relatively good energy saving effect can still be achieved. It can be seen that the search space group with a small monitoring period is suitable for use in combination with skipping PDCCH, while the search space group with a large monitoring period may not be suitable for use in combination with skipping PDCCH.

[0193] When the above-mentioned first information only indicates the second search space, the situation in which the second time domain length corresponding to the first information is set to 0 indicates that the second search space group is not suitable for use in combination with skip PDCCH, that is, the monitoring period of the second search space group is relatively large. Among them, the larger monitoring period of the second search space group can be reflected in that: the monitoring period of the second search space group is greater than the monitoring period of the third search space group, and the third search space group is one of the multiple search space groups configured by the network device for the terminal device. In other words, the second search space group with a larger monitoring period is not suitable for use in combination with skip PDCCH, and the third search space group with a smaller monitoring period is suitable for use in combination with skip PDCCH.

[0194] For example, when the network device configures SSSG0 and SSSG1 for the terminal device, and the monitoring period of SSSG0 is less than that of SSSG1, SSSG0 can be considered as the third search space group, and SSSG1 can be considered as the second search space group. One possible way is that skipping PDCCH is only combined with SSSG0 (that is, the third search space group is SSSG0 at this time), and cannot be combined with SSSG1 (that is, the second search space group is SSSG1 at this time). That is, when the first information indicates monitoring SSSG1 (that is, the second search space group is SSSG1 at this time), the terminal device will not execute skipping PDCCH, and only when the first information indicates monitoring SSSG0 (that is, the third search space group is SSSG0 at this time), the terminal device will execute skipping PDCCH. Exemplarily, when the first information is 2 bits, the situation of 4-bit status indication can be shown by Table 8:

[0195] Table 8

[0196]

[0197] As shown in Table 8 above, when the bit state of the first information is 00, or 01, or 10, the first information instructs the terminal device to monitor SSSG0 (that is, the third search space group is SSSG0 at this time), and executes skipping PDCCH, that is, the third search space group with a smaller monitoring period is used in combination with skipping PDCCH. However, when the bit state of the first information is 11, the first information only instructs the terminal device to monitor SSSG1 (that is, the second search space group is SSSG1 at this time), and does not execute skipping PDCCH, that is, the second search space group with a larger monitoring period is not used in combination with skipping PDCCH. Among them, when the bit state of the first information is 11, by configuring D4 (that is, the second time domain length) corresponding to the bit state 11 to 0, it is achieved that the bit state 11 only indicates the second search space group (that is, SSSG1).

[0198] It should be noted that Tables 1 to 8 only show the indication situation where the first information is 2 bits. Of course, the first information can also be 3 bits or multiple bits of more than 3 bits. The indication principle is similar to the indication principle of 2 bits and will not be described in detail here.

[0199] In one example, the monitoring period of the second search space group (or the third search space group) may be a preset period, and the preset period is irrelevant to the period of the SSS included in the second search space group (or the third search space group).

[0200] In another example, the monitoring period of the second search space group (or the third search space group) is a second monitoring period (or a third monitoring period), and the second monitoring period (or the third monitoring period) is related to the period of the SSS included in the second search space group (or the third search space group). The second monitoring period (or the third monitoring period) may include the following three situations:

[0201] Case c1: the second monitoring period (or the third monitoring period) is the largest monitoring period or the smallest monitoring period among the monitoring periods of at least one search space included in the second search space group (or the third search space group).

[0202] Case c2: The second monitoring period (or the third monitoring period) is the monitoring period of the search space in which the terminal device currently receives downlink control information (such as DCI).

[0203] Case c3: The second monitoring period (or the third monitoring period) is the largest monitoring period or the smallest monitoring period among the monitoring periods of multiple search spaces when the terminal device receives downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among the multiple search spaces, or the monitoring period of the search space with the smallest index value among the multiple search spaces.

[0204] It should be noted that in the description of the embodiments of the present application, the first search space group, the second search space group and the third search space group mentioned are all general terms, all indicating a search space group, which are only used for the purpose of distinguishing the description and do not have any special meaning. Of course, there may be other names, and the present application does not limit this.

[0205] By adopting the PDCCH monitoring method provided in the embodiment of the present application, when support for skipping PDCCH and SSSG switching is indicated at the same time, the time domain length of skipping PDCCH and the monitoring period of SSSG can be guaranteed to match.

[0206] In the above Figure 6 In the embodiments shown, the preset time domain length is described as being related to the search space group (SSSG) for monitoring PDCCH. In some embodiments, the preset time domain length may be related to the search space (SSS) for monitoring PDCCH. At this time, the network device may configure the association between the preset time domain length and the SSS, and the terminal device determines the preset time domain length according to the SSS where the DCI indicated is received. The specific implementation process of monitoring PDCCH is the same as above. Figure 6 The implementation process of monitoring PDCCH in the illustrated embodiment is similar and can be referenced to each other, and will not be described in detail here.

[0207] Optionally, when the terminal device receives downlink control information at a time domain position where multiple search spaces overlap, the terminal device determines the preset time domain length based on the monitoring period of the search space with the largest index value among the multiple search spaces, or the monitoring period of the search space with the smallest index value among the multiple search spaces.

[0208] Based on the above embodiments, the present application also provides a communication device, referring to Figure 7 As shown, the communication device 700 may include a transceiver unit 701 and a processing unit 702. The transceiver unit 701 is used for the communication device 700 to receive information (message or data) or send information (message or data), and the processing unit 702 is used to control and manage the actions of the communication device 700. The processing unit 702 may also control the steps performed by the transceiver unit 701.

[0209] Exemplarily, the communication device 700 may specifically be the terminal device in the above-mentioned embodiments, the processor in the terminal device, or the chip, or the chip system, or a functional module, etc.; or, the communication device 700 may specifically be the network device in the above-mentioned embodiments, the processor of the network device, or the chip, or the chip system, or a functional module, etc.

[0210] In one embodiment, the communication device 700 is used to implement the above Figure 6 The functions of the terminal device in the above-described embodiment may specifically include:

[0211] The transceiver unit 701 is used to receive first information from a network device, and the first information can be used to instruct the terminal device not to monitor PDCCH within a preset time domain length; wherein the preset time domain length is related to the search space group for monitoring PDCCH; the processing unit 702 is used to not monitor PDCCH within the preset time domain length according to the first information.

[0212] In an optional implementation, the first information may also be used to indicate a search space group for monitoring the PDCCH.

[0213] Exemplarily, the first information may include a first indication field and a second indication field; wherein, when the first indication field is a first value, the preset time domain length is a first time domain length, and the second indication field is used to indicate that the terminal device does not monitor PDCCH within the first time domain length; the first time domain length is related to the search space group for which the terminal device currently monitors PDCCH; when the first indication field is a second value, the second indication field is used to indicate that the terminal device monitors PDCCH according to the first search space group.

[0214] Exemplarily, the first information may include A bits, and different values ​​of the A bits correspond to different time domain lengths for not monitoring PDCCH, and / or different search space groups for monitoring PDCCH; A is an integer greater than or equal to 2.

[0215] In an optional implementation, when the first information indicates a second search space group, the value of the A bits corresponds to the second search space group and a second time domain length, and the second time domain length is 0.

[0216] Optionally, the monitoring period of the second search space group is greater than the monitoring period of the third search space group, and the third search space group is one of multiple search space groups configured by the network device for the terminal device.

[0217] Exemplarily, the preset time domain length may be one in a first time domain length set, where the first time domain length set is one of N time domain length sets, where N is an integer greater than or equal to 1; or, the preset time domain length may be an integer multiple of the monitoring period of the search space group of the PDCCH currently monitored by the terminal device.

[0218] Specifically, each of the N time domain length sets is associated with one of the M search space groups, and the M search space groups are configured by the network device for the terminal device, where M is an integer greater than 1.

[0219] Exemplarily, the monitoring period of the search space group is a preset period; or, the monitoring period of the search space group is a first monitoring period, and the first monitoring period may be the maximum monitoring period or the minimum monitoring period among the monitoring periods of at least one search space included in the search space group; or, the first monitoring period may be the monitoring period of the search space in which the terminal device currently receives downlink control information; or, the first monitoring period may be the maximum monitoring period or the minimum monitoring period among the monitoring periods of the multiple search spaces when the terminal device receives the downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among the multiple search spaces, or the monitoring period of the search space with the smallest index value among the multiple search spaces.

[0220] In an optional embodiment, the starting position of the preset time domain length may be a first time domain position; wherein, the first time domain position may be a time slot in which the terminal device receives the downlink control information; or, the first time domain position may be a time slot next to the time slot in which the terminal device receives the downlink control information; or, when the first monitoring period is the largest monitoring period or the smallest monitoring period among the monitoring periods of at least one search space included in the search space group, the first time domain position may be a monitoring PDCCH position of the search space corresponding to the first monitoring period and the next largest monitoring period or the smallest monitoring period.

[0221] In an optional implementation, the monitoring period of the search space group is a preset period, including: the transceiver unit 701 is also used to receive second information from the network device, and the second information is used to configure the monitoring period of the search space group for monitoring PDCCH.

[0222] In one example, the search space group configuration information of the fourth search space group includes the second information, the second information includes the monitoring period of the fourth search space group, and the fourth search space group is one of the multiple search space groups configured by the network device for the terminal device.

[0223] In another example, the second information includes at least one monitoring cycle; when the second information includes one monitoring cycle, the monitoring cycle of the M search space groups are all the one monitoring cycle; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; when the second information includes M monitoring cycles, the M search space groups correspond one-to-one to the M monitoring cycles.

[0224] Optionally, the second information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device.

[0225] In one possible design, the second information is included in the bandwidth part configuration information or the cell configuration information configured by the network device for the terminal device, and the transceiver unit 701 is also used to receive fifth information from the network device, and the fifth information is also used to configure the monitoring period of the search space group for monitoring the PDCCH, and the fifth information is included in the search space group configuration information of the seventh search space group. When the network device configures the second information but does not configure the fifth information, the monitoring period of the search space group included in the second information corresponds to the seventh search space group. When the network device configures the second information and also configures the fifth information, the monitoring period of the search space group included in the fifth information corresponds to the seventh search space group.

[0226] In an optional implementation, the transceiver unit 701 is further used to receive third information from the network device, where the third information is used to configure a time domain length set corresponding to a search space group for monitoring the PDCCH.

[0227] In one example, the search space group configuration information of the fifth search space group includes the third information, the third information includes a time domain length set, the time domain length set includes one or more time domain lengths, and the preset time domain length is one of the one or more time domain lengths included in the third information; the fifth search space group is one of the multiple search space groups configured by the network device for the terminal device.

[0228] In another example, the third information includes at least one time domain length set; when the third information includes a time domain length set, the M search space groups all correspond to the one time domain length set; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; the preset time domain length is a time domain length in the one time domain length set; when the third information includes M time domain length sets, the M search space groups correspond one-to-one to the M time domain length sets, and the preset time domain length is a time domain length in the time domain length set corresponding to the search space group for monitoring PDCCH.

[0229] Optionally, the third information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device.

[0230] In one possible design, the third information is included in the bandwidth part configuration information or the cell configuration information configured by the network device for the terminal device, and the transceiver unit 701 is also used to receive fourth information from the network device, and the fourth information is also used to configure the monitoring period of the search space group for monitoring the PDCCH, and the fourth information is included in the search space group configuration information of the sixth search space group. When the network device configures the third information but does not configure the fourth information, the monitoring period of the search space group included in the third information corresponds to the sixth search space group. When the network device configures the third information and also configures the fourth information, the monitoring period of the search space group included in the fourth information corresponds to the sixth search space group.

[0231] In another embodiment, the communication device 700 is used to implement the above Figure 6 The functions of the network device in the embodiments described above may specifically include:

[0232] The processing unit 702 is used to determine the first information, where the first information is used to instruct the terminal device not to monitor the PDCCH within a preset time domain length; wherein the preset time domain length is related to the search space group for monitoring the PDCCH; and the transceiver unit 701 is used to send the first information to the terminal device.

[0233] In an optional implementation, the first information may also be used to indicate a search space group for monitoring the PDCCH.

[0234] In one example, the first information may include a first indication field and a second indication field; wherein, when the first indication field is a first value, the preset time domain length is a first time domain length, and the second indication field can be used to indicate that the terminal device does not monitor PDCCH within the first time domain length; the first time domain length is related to the search space group for which the terminal device currently monitors PDCCH; when the first indication field is a second value, the second indication field can be used to indicate that the terminal device monitors PDCCH according to the first search space group.

[0235] In one example, the first information may include A bits, and different values ​​of the A bits correspond to different time domain lengths for not monitoring PDCCH, and / or different search space groups for monitoring PDCCH; A is an integer greater than or equal to 2.

[0236] In a specific implementation, when the first information indicates the second search space group, the value of the A bits may correspond to the second search space group and the second time domain length, and the second time domain length is 0.

[0237] Optionally, the monitoring period of the second search space group is greater than the monitoring period of the third search space group, and the third search space group is one of multiple search space groups configured by the network device for the terminal device.

[0238] Exemplarily, the preset time domain length is one in a first time domain length set, the first time domain length set is one of multiple time domain length sets, and N is an integer greater than or equal to 1; or, the preset time domain length is an integer multiple of the monitoring period of the search space group of the PDCCH currently monitored by the terminal device.

[0239] Specifically, each of the N time domain length sets is associated with one of the M search space groups, and the M search space groups are configured by the network device for the terminal device, where M is an integer greater than 1.

[0240] In an optional embodiment, the monitoring period of the search space group is a preset period; or, the monitoring period of the search space group is a first monitoring period, and the first monitoring period may be the maximum monitoring period or the minimum monitoring period of the monitoring period of at least one search space included in the search space group; or, the first monitoring period may be the monitoring period of the search space in which the terminal device currently receives downlink control information; or, the first monitoring period may be the maximum monitoring period or the minimum monitoring period of the monitoring periods of the multiple search spaces when the terminal device receives the downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among the multiple search spaces, or the monitoring period of the search space with the smallest index value among the multiple search spaces.

[0241] Optionally, the starting position of the preset time domain length may be a first time domain position; the first time domain position may be a time slot in which the terminal device receives the downlink control information; or, the first time domain position may be a time slot next to the time slot in which the terminal device receives the downlink control information; or, when the first monitoring period is the largest monitoring period or the smallest monitoring period of at least one search space included in the search space group, the first time domain position may be the position of monitoring PDCCH of the search space of the next largest monitoring period or the smallest monitoring period of the search space corresponding to the first monitoring period.

[0242] In an optional implementation, the monitoring period of the search space group is a preset period, which may include: the transceiver unit 701 is also used to send second information to the terminal device, and the second information is used to configure the monitoring period of the search space group for monitoring PDCCH.

[0243] In one example, the search space group configuration information of the fourth search space group includes the second information, the second information includes the monitoring period of the fourth search space group, and the fourth search space group is one of the multiple search space groups configured by the network device for the terminal device.

[0244] In another example, the second information includes at least one monitoring cycle; when the second information includes one monitoring cycle, the monitoring cycle of the M search space groups are all the one monitoring cycle; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; when the second information includes M monitoring cycles, the M search space groups correspond one-to-one to the M monitoring cycles.

[0245] Optionally, the second information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device.

[0246] In an optional implementation, the transceiver unit 701 is further used to send third information to the terminal device, where the third information is used to configure a time domain length set corresponding to a search space group for monitoring PDCCH.

[0247] In one example, the search space group configuration information of the fifth search space group includes the third information, the third information includes a time domain length set, the time domain length set includes one or more time domain lengths, the fifth search space group is one of the multiple search space groups configured by the network device for the terminal device; the preset time domain length is one of the one or more time domain lengths included in the third information.

[0248] In another example, the third information includes at least one time domain length set; when the third information includes a time domain length set, the M search space groups all correspond to the one time domain length set; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; the preset time domain length is a time domain length in the one time domain length set; when the third information includes M time domain length sets, the M search space groups correspond one-to-one to the M time domain length sets, and the preset time domain length is a time domain length in the time domain length set corresponding to the search space group for monitoring PDCCH.

[0249] Optionally, the third information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device.

[0250] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. Each functional unit in the embodiments of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0251] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0252] Based on the above embodiments, the present application also provides a communication device, referring to Figure 8 As shown, the communication device 800 may include a transceiver 801 and a processor 802. Optionally, the communication device 800 may further include a memory 803. The memory 803 may be disposed inside the communication device 800 or outside the communication device 800. The processor 802 may control the transceiver 801 to receive and send information or data.

[0253] Specifically, the processor 802 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP. The processor 802 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0254] The transceiver 801, the processor 802 and the memory 803 are interconnected. Optionally, the transceiver 801, the processor 802 and the memory 803 are interconnected via a bus 804; the bus 804 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0255] In an optional implementation, the memory 803 is used to store programs, etc. Specifically, the program may include a program code, and the program code includes a computer operation instruction. The memory 803 may include a RAM, and may also include a non-volatile memory (non-volatile memory), such as one or more disk memories. The processor 802 executes the application stored in the memory 803 to implement the above functions, thereby realizing the functions of the communication device 800.

[0256] Exemplarily, the communication device 800 may be the terminal device in the above embodiment; or may be the network device in the above embodiment.

[0257] In one embodiment, the communication device 800 implements Figure 6 In the embodiment shown, the transceiver 801 can realize the functions of the terminal device. Figure 6 The sending and receiving operations performed by the terminal device in the embodiment shown; the processor 802 can implement Figure 6 In the embodiment shown, other operations other than the sending and receiving operations are performed by the terminal device. For specific related descriptions, please refer to the above Figure 6 The relevant description in the illustrated embodiment will not be described in detail here.

[0258] In another embodiment, the communication device 800 implements Figure 6 In the embodiment shown, the transceiver 801 can implement the functions of the network device. Figure 6 The transceiver operations performed by the network device in the embodiment shown; the processor 802 can implement Figure 6 In the embodiment shown, other operations other than the sending and receiving operations are performed by the network device. For specific related descriptions, please refer to the above Figure 6 The relevant description in the illustrated embodiment will not be described in detail here.

[0259] Based on the above embodiments, an embodiment of the present application provides a communication system, which may include the terminal device and network device involved in the above embodiments.

[0260] An embodiment of the present application further provides a computer-readable storage medium, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the PDCCH monitoring method provided in the above method embodiment.

[0261] An embodiment of the present application further provides a computer program product, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the PDCCH monitoring method provided in the above method embodiment.

[0262] An embodiment of the present application also provides a chip, including a processor, wherein the processor is coupled to a memory and is used to call a program in the memory so that the chip implements the PDCCH monitoring method provided by the above method embodiment.

[0263] An embodiment of the present application further provides a chip, which is coupled to a memory and is used to implement the PDCCH monitoring method provided in the above method embodiment.

[0264] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0265] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0266] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0267] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0268] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for monitoring a physical downlink control channel (PDCCH), characterized in that: include: Receiving first information, where the first information is used to instruct the terminal device not to monitor the PDCCH within a preset time domain length; The preset time domain length is related to the period of the search space group for monitoring the PDCCH; Not monitoring the PDCCH within the preset time domain length according to the first information; The first information includes a first indication field and a second indication field; Wherein, when the first indication field is a first value, the preset time domain length is a first time domain length, and the second indication field is used to indicate that the terminal device does not monitor the PDCCH within the first time domain length; the first time domain length is related to the search space group of the PDCCH currently monitored by the terminal device; When the first indication field is a second value, the second indication field is used to instruct the terminal device to monitor the PDCCH according to the first search space group.

2. The method according to claim 1, characterized in that The preset time domain length is one of a first time domain length set, the first time domain length set is one of N time domain length sets, and N is an integer greater than 1 or equal to .

3. The method according to claim 2, characterized in that Each of the N time domain length sets is associated with one of the M search space groups, and the M search space groups are configured by a network device for the terminal device, where M is an integer greater than 1.

4. The method according to claim 1, characterized in that The preset time domain length is an integer multiple of the monitoring period of the search space group that the terminal device currently monitors the PDCCH.

5. The method according to claim 4, characterized in that The monitoring period of the search space group is a preset period; or The monitoring period of the search space group is a first monitoring period, and the first monitoring period is the largest monitoring period or the smallest monitoring period among the monitoring periods of at least one search space included in the search space group; or, The first monitoring period is a monitoring period of a search space in which the terminal device currently receives downlink control information; or, The first monitoring period is the maximum monitoring period or the minimum monitoring period among the monitoring periods of the multiple search spaces when the terminal device receives the downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among the multiple search spaces, or the monitoring period of the search space with the smallest index value among the multiple search spaces.

6. The method according to claim 5, characterized in that The starting position of the preset time domain length is the first time domain position; The first time domain position is a time slot in which the terminal device receives the downlink control information; or, The first time domain position is a time slot next to a time slot in which the terminal device receives the downlink control information; or, When the first monitoring period is the maximum monitoring period or the minimum monitoring period among the monitoring periods of at least one search space included in the search space group, the first time domain position is the monitoring PDCCH position of the search space of the next maximum monitoring period or minimum monitoring period of the search space corresponding to the first monitoring period.

7. The method according to claim 5, characterized in that The monitoring period of the search space group is a preset period, including: Second information is received, where the second information is used to configure a monitoring period of a search space group for monitoring a PDCCH.

8. The method according to claim 7, characterized in that The search space group configuration information of the fourth search space group includes the second information, and the second information includes the monitoring period of the fourth search space group. The fourth search space group is one of multiple search space groups configured by the network device for the terminal device.

9. The method according to claim 7, characterized in that The second information includes at least one monitoring period; When the second information includes a monitoring period, the monitoring periods of the M search space groups are all the one monitoring period; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; When the second information includes M monitoring periods, the M search space groups correspond one-to-one to the M monitoring periods.

10. The method according to claim 9, characterized in that The second information is included in the bandwidth part configuration information or the cell configuration information configured by the network device for the terminal device.

11. The method according to claim 7 or 8, characterized in that The second information is included in bandwidth part configuration information or cell configuration information configured by the network device for the terminal device, and the method further includes: Receive the fifth information, which is also used to configure the monitoring period of the search space group for monitoring PDCCH, and the fifth information is included in the search space group configuration information of the seventh search space group; when the network device configures the second information but does not configure the fifth information, the monitoring period of the search space group included in the second information corresponds to the seventh search space group; when the network device configures the second information and also configures the fifth information, the monitoring period of the search space group included in the fifth information corresponds to the seventh search space group.

12. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Third information is received, where the third information is used to configure a time domain length set corresponding to a search space group for monitoring a PDCCH.

13. The method according to claim 12, characterized in that The search space group configuration information of the fifth search space group includes the third information, the third information includes a time domain length set, the time domain length set includes one or more time domain lengths, and the preset time domain length is one of the one or more time domain lengths included in the third information; the fifth search space group is one of the multiple search space groups configured by the network device for the terminal device.

14. The method according to claim 12, characterized in that The third information includes at least one time domain length set; When the third information includes a time domain length set, the M search space groups all correspond to the one time domain length set; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; the preset time domain length is a time domain length in the one time domain length set; When the third information includes M time domain length sets, the M search space groups correspond one-to-one to the M time domain length sets, and the preset time domain length is a time domain length in the time domain length set corresponding to the search space group for monitoring the PDCCH.

15. The method according to claim 14, characterized in that The third information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device.

16. The method according to claim 12, characterized in that The third information is included in bandwidth part configuration information or cell configuration information configured by the network device for the terminal device, and the method further includes: Receive fourth information, which is also used to configure a monitoring period of a search space group for monitoring PDCCH, and the fourth information is included in the search space group configuration information of a sixth search space group; when the network device configures the third information but does not configure the fourth information, the monitoring period of the search space group included in the third information corresponds to the sixth search space group; when the network device configures the third information and also configures the fourth information, the monitoring period of the search space group included in the fourth information corresponds to the sixth search space group.

17. A method for monitoring a physical downlink control channel (PDCCH), characterized in that: include: Determine first information, where the first information is used to instruct the terminal device not to monitor the PDCCH within a preset time domain length; wherein the preset time domain length is related to a period of a search space group for monitoring the PDCCH; sending the first information; The first information includes a first indication field and a second indication field; Wherein, when the first indication field is a first value, the preset time domain length is a first time domain length, and the second indication field is used to indicate that the terminal device does not monitor the PDCCH within the first time domain length; the first time domain length is related to the search space group of the PDCCH currently monitored by the terminal device; When the first indication field is a second value, the second indication field is used to instruct the terminal device to monitor the PDCCH according to the first search space group.

18. The method according to claim 17, characterized in that The preset time domain length is one of a first time domain length set, the first time domain length set is one of N time domain length sets, and N is an integer greater than or equal to 1.

19. The method according to claim 18, characterized in that Each of the N time domain length sets is associated with one of the M search space groups, and the M search space groups are configured by a network device for the terminal device, where M is an integer greater than 1.

20. The method of claim 17, wherein: The preset time domain length is an integer multiple of the monitoring period of the search space group that the terminal device currently monitors the PDCCH.

21. The method of claim 20, wherein: The monitoring period of the search space group is a preset period; or The monitoring period of the search space group is the first monitoring period, and the first monitoring period is the maximum monitoring period or the minimum monitoring period of the monitoring period of at least one search space included in the search space group; or, the first monitoring period is the monitoring period of the search space in which the terminal device currently receives downlink control information; or, the first monitoring period is the maximum monitoring period or the minimum monitoring period of the monitoring periods of the multiple search spaces when the terminal device receives the downlink control information at a time domain position where multiple search spaces overlap, or the monitoring period of the search space with the largest index value among the multiple search spaces, or the monitoring period of the search space with the smallest index value among the multiple search spaces.

22. The method according to claim 21, characterized in that The starting position of the preset time domain length is the first time domain position; the first time domain position is the time slot in which the terminal device receives the downlink control information; or, the first time domain position is the next time slot of the time slot in which the terminal device receives the downlink control information; or, when the first monitoring period is the largest monitoring period or the smallest monitoring period of the monitoring period of at least one search space included in the search space group, the first time domain position is the monitoring PDCCH position of the search space of the next largest monitoring period or the smallest monitoring period of the search space corresponding to the first monitoring period.

23. The method of claim 21, wherein: The monitoring period of the search space group is a preset period, including: Second information is sent, where the second information is used to configure a monitoring period of a search space group for monitoring the PDCCH.

24. The method of claim 23, wherein: The search space group configuration information of the fourth search space group includes the second information, and the second information includes the monitoring period of the fourth search space group. The fourth search space group is one of multiple search space groups configured by the network device for the terminal device.

25. The method of claim 23, wherein: The second information includes at least one monitoring period; When the second information includes a monitoring period, the monitoring periods of the M search space groups are all the one monitoring period; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; When the second information includes M monitoring periods, the M search space groups correspond one-to-one to the M monitoring periods.

26. The method of claim 25, wherein: The second information is included in the bandwidth part configuration information or the cell configuration information configured by the network device for the terminal device.

27. The method according to claim 23 or 24, characterized in that The second information is included in bandwidth part configuration information or cell configuration information configured by the network device for the terminal device, and the method further includes: The fifth information is sent, and the fifth information is also used to configure the monitoring period of the search space group for monitoring PDCCH, and the fifth information is included in the search space group configuration information of the seventh search space group; when the network device configures the second information and does not configure the fifth information, the monitoring period of the search space group included in the second information corresponds to the seventh search space group; when the network device configures the second information and also configures the fifth information, the monitoring period of the search space group included in the fifth information corresponds to the seventh search space group.

28. The method according to any one of claims 17 to 19, characterized in that: The method further comprises: Send third information, where the third information is used to configure a time domain length set corresponding to a search space group for monitoring the PDCCH.

29. The method of claim 28, wherein: The search space group configuration information of the fifth search space group includes the third information, the third information includes a time domain length set, the time domain length set includes one or more time domain lengths, the fifth search space group is one of multiple search space groups configured by the network device for the terminal device; the preset time domain length is one of the one or more time domain lengths included in the third information.

30. The method of claim 28, wherein: The third information includes at least one time domain length set; When the third information includes a time domain length set, the M search space groups all correspond to the one time domain length set; the M search space groups are configured by the network device for the terminal device, and M is an integer greater than 1; the preset time domain length is a time domain length in the one time domain length set; When the third information includes M time domain length sets, the M search space groups correspond one-to-one to the M time domain length sets, and the preset time domain length is a time domain length in the time domain length set corresponding to the search space group for monitoring the PDCCH.

31. The method of claim 30, wherein: The third information is included in the bandwidth part configuration information or cell configuration information configured by the network device for the terminal device.

32. The method of claim 28, wherein: The third information is included in bandwidth part configuration information or cell configuration information configured by the network device for the terminal device, and the method further includes: Send the fourth information, which is also used to configure the monitoring period of the search space group for monitoring PDCCH, and the fourth information is included in the search space group configuration information of the sixth search space group; when the network device configures the third information but does not configure the fourth information, the monitoring period of the search space group included in the third information corresponds to the sixth search space group; when the network device configures the third information and also configures the fourth information, the monitoring period of the search space group included in the fourth information corresponds to the sixth search space group.

33. A terminal device, characterized in that: Includes memory, processor and transceiver, where: The memory is used to store computer instructions; The transceiver is used to receive and send information; The processor is coupled to the memory and is used to call the computer instructions in the memory so that the terminal device executes the method according to any one of claims 1-16.

34. A network device, characterized in that: Includes memory, processor and transceiver, where: The memory is used to store computer instructions; The transceiver is used to receive and send information; The processor is coupled to the memory, and is used to call the computer instructions in the memory so that the network device executes the method according to any one of claims 17-32.

35. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which, when called by the computer, are used to enable the computer to execute the method described in any one of claims 1 to 16, or to execute the method described in any one of claims 17 to 32.

36. A computer program product comprising instructions, characterized in that When the computer program product is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 16, or execute the method according to any one of claims 17 to 32.

37. A chip, characterized in that: The chip is coupled to the memory and is used to read and execute program instructions stored in the memory to implement the method as described in any one of claims 1-16, or to implement the method as described in any one of claims 17-32.

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