Wireless communication method, network device and terminal device

Abstract

The embodiment of the present application provides a wireless communication method and device for unlicensed spectrum, which can realize the monitoring of PDCCH on unlicensed spectrum. The method includes: a terminal device monitors a target downlink signal; when the target downlink signal is monitored at a first moment, the terminal device monitors the physical downlink control channel PDCCH from a second moment, and the second moment is later than the first moment.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and specifically to a wireless communication method, a network device, and a terminal device. Background Art

[0002] In a wireless communication system, a base station may schedule a physical downlink shared channel (PDSCH) to a terminal device via a physical downlink control channel (PDCCH).

[0003] On the unlicensed spectrum, the base station needs to perform a Listen Before Talk (LBT) operation before sending the PDCCH, and only sends the PDCCH after the LBT operation is successful. How the terminal device can monitor the PDCCH on the unlicensed spectrum is an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a wireless communication method and device for unlicensed spectrum, which can realize the monitoring of PDCCH on the unlicensed spectrum.

[0005] In a first aspect, a wireless communication method for unlicensed spectrum is provided, comprising: a terminal device monitors a target downlink signal; when the target downlink signal is monitored at a first moment, the terminal device monitors a physical downlink control channel PDCCH from a second moment, the second moment being later than the first moment.

[0006] In a second aspect, a wireless communication method for unlicensed spectrum is provided, including: a network device sends first configuration information to a terminal device, the first configuration information is used by the terminal device to determine a first monitoring behavior and a second monitoring behavior, wherein the first monitoring behavior is different from the second monitoring behavior; the second monitoring behavior is a behavior of monitoring PDCCH from a second moment when a target downlink signal is monitored at a first moment; the first monitoring behavior is a behavior of monitoring PDCCH between the first moment and the second moment, or the first monitoring behavior is a behavior of monitoring the target downlink signal before the first moment when the target downlink signal is PDCCH.

[0007] In a third aspect, a terminal device is provided for executing the method in the first aspect.

[0008] Specifically, the terminal device includes a functional module for executing the method in the above-mentioned first aspect.

[0009] In a fourth aspect, a network device is provided for executing the method in the second aspect.

[0010] Specifically, the network device includes a functional module for executing the method in the above second aspect.

[0011] In a fifth aspect, a communication device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or the second aspect.

[0012] In a sixth aspect, a chip is provided for implementing the method in the first aspect or the second aspect.

[0013] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the method in the first aspect or the second aspect as described above.

[0014] In a seventh aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in the first aspect or the second aspect.

[0015] In an eighth aspect, a computer program product is provided, comprising computer program instructions, wherein the computer program instructions enable a computer to execute the method in the first aspect or the second aspect.

[0016] In a ninth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in the first or second aspect above.

[0017] Through the above technical solution, the terminal device monitors the target downlink signal; when the target downlink signal is monitored at the first moment, it indicates that the unlicensed spectrum has been occupied by the network device, then from the second moment, the terminal device monitors PDCCH, which enables the terminal device to monitor PDCCH on the unlicensed spectrum, and when the target downlink signal is monitored at the first moment, the terminal device monitors PDCCH from the second moment, and the terminal device does not need to monitor PDCCH all the time, which can save power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a communication system architecture provided according to an embodiment of the present application.

[0019] Figure 2 This is a schematic diagram of resources for monitoring PDCCH provided according to an embodiment of the present application.

[0020] Figure 3It is a schematic diagram of PDCCH candidates according to an embodiment of the present application.

[0021] Figure 4 It is a schematic flowchart of a wireless communication method for unlicensed spectrum according to an embodiment of the present application.

[0022] Figure 5 It is a schematic diagram of a method for a terminal device to monitor PDCCH according to an embodiment of the present application.

[0023] Figure 6 It is a schematic diagram of a method for a terminal device to monitor PDCCH according to an embodiment of the present application.

[0024] Figure 7 It is a schematic diagram of a method for a terminal device to monitor PDCCH according to an embodiment of the present application.

[0025] Figure 8 It is a schematic diagram of a method for a terminal device to monitor PDCCH according to an embodiment of the present application.

[0026] Fig. 9 It is a schematic flowchart of a wireless communication method for unlicensed spectrum according to an embodiment of the present application.

[0027] Fig.10 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0028] Fig.11 It is a schematic block diagram of a network device according to an embodiment of the present application.

[0029] Fig.12 It is a schematic block diagram of a communication device according to an embodiment of the present application.

[0030] Fig.13 is a schematic block diagram of a chip according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed band (LTE-based access to unlicensed spectrum, LTE-U) system, NR on unlicensed band (NR-based access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Wireless Access (WiMAX) communication system, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next generation communication system or other communication systems, etc.

[0033] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0034] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 As shown. The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or referred to as a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographical area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

[0035] The communication system 100 also includes at least one terminal device 120 located within the coverage of the network device 110. As used herein, "terminal device" includes but is not limited to connection via a wired line, such as via a Public Switched Telephone Networks (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as, for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or a device of another terminal device configured to receive / send communication signals; and / or an Internet of Things (IoT) device. A terminal device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communications capabilities; PDAs that may include radiotelephones, pagers, Internet / Intranet access, Web browsers, notepads, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A terminal device may refer to an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

[0036] Optionally, terminal devices 120 may perform device-to-device (D2D) communication.

[0037] Optionally, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0038] Figure 1 One network device and two terminal devices are shown exemplarily. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0039] Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0040] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be referred to as a communication device. Figure 1 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0041] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] The method of the embodiment of the present application can be applied to the communication of unlicensed spectrum. Unlicensed spectrum is a spectrum that can be used for radio equipment communication divided by countries and regions. The spectrum can be considered as a shared spectrum, that is, communication equipment in different communication systems can use the spectrum as long as they meet the regulatory requirements set by the country or region on the spectrum, and they do not need to apply for exclusive spectrum authorization from the government. In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist in a friendly manner on the spectrum, when the communication equipment communicates on the unlicensed spectrum, it can follow the principle of LBT first, that is, before the communication equipment sends a signal on the channel of the unlicensed spectrum, it needs to perform channel sensing (or channel detection) first. Only when the channel sensing result is that the channel is idle, the communication equipment can send a signal; if the result of the channel sensing of the communication equipment on the unlicensed spectrum is that the channel is busy, the signal cannot be sent. In order to ensure fairness, in one transmission, the duration of the communication equipment using the channel of the unlicensed spectrum for signal transmission cannot exceed the maximum channel occupancy time (Maximum Channel Occupancy Time, MCOT).

[0043] In unlicensed spectrum communications, when a network device needs to send a PDCCH to a terminal device, a LBT operation may be performed first. If the LBT operation is successful, the network device sends the PDCCH.

[0044] PDCCH can support a variety of downlink control information (DCI) formats and aggregation level sizes, but the terminal device may not be able to obtain this information corresponding to the PDCCH sent by the network device in advance, so it is necessary to perform blind detection on the PDCCH. In NR, information such as the DCI format, aggregation level, the number of PDCCH candidates corresponding to the aggregation level, and the monitoring period of the search space in the time domain can be configured through high-level parameters. Based on this configuration information, the complexity of blind detection by the terminal device can be flexibly controlled.

[0045] However, while limiting the complexity of blind detection, it also leads to a decrease in the flexibility of network device scheduling and places high demands on the network device scheduler. In order to reduce the restrictions on the scheduler, the number of configured PDCCH candidates supported in NR can exceed the upper limit of the terminal device's blind detection capability. At this time, the terminal device can determine the configured PDCCH candidate or a subset of the configured PDCCH candidate as the PDCCH candidate set to be detected in the configured PDCCH candidate set according to a predefined mechanism.

[0046] In NR, for each downlink bandwidth part (Band Width Part, BWP) of the serving cell, up to 10 search space sets can be configured, where each search space set includes search spaces of one or more aggregation levels. In addition, the search space set corresponds to the time domain configuration information, and the terminal device can monitor the PDCCH candidates according to the position of the configured search space set in the time domain, thereby eliminating the need to monitor the PDCCH candidates in each downlink subframe like LTE. Among them, the time domain configuration information of the search space set includes the monitoring period, time slot offset, number of time slots, symbol position and control resource set index.

[0047] The way in which the terminal device monitors the PDCCH candidates in the search space can be divided into two steps: the first step is to determine the control channel element (CCE) index of each PDCCH candidate in the configured PDCCH candidate set in the control resource set (ControlResource Set, CORESET) according to the configuration information of the search space set; the second step is to determine the PDCCH candidate set to be detected in the configured candidate PDCCH set according to the preset rules, wherein the PDCCH candidate set to be detected is the configured candidate PDCCH set or a subset of the configured candidate PDCCH set.

[0048] For determining the subset to be detected within the configured candidate PDCCH set, an upper limit of the blind detection capability of the terminal device may be defined. The blind detection capability includes the number of PDCCH candidates detected in each time slot and the number of non-overlapping CCEs. Table 1 gives an example.

[0049] Table 1

[0050]

[0051] Among them, the maximum number of PDCCH candidates limits the complexity of blind detection decoding by the terminal device, while the number of non-overlapping CCEs limits the complexity of channel estimation by the terminal device. The method for determining the search space takes into account the complexity of the terminal device implementation and can adopt a simplified method, which can be as follows:

[0052] 1) The public search space set takes precedence over the dedicated search space set of the terminal device;

[0053] 2) In the search space set dedicated to the terminal device, the search space set with a smaller identity (ID) number takes precedence over the search space set with a larger ID number;

[0054] 3) If the dedicated search space set of the configured terminal device does not meet any of the two indicators in Table 1 after calculating the number of PDCCH candidates in each time slot or the number of non-overlapping CCEs in each time slot, all PDCCH candidates in the dedicated search space set of this terminal device may not be blind checked, and the UE dedicated search space set with an ID number greater than this search space set shall not be blind checked either.

[0055] The search space set in the embodiment of the present application may be configured by high-level signaling, wherein the configuration information indicated by the high-level signaling may indicate at least one of the following:

[0056] 1) Monitoring period (i.e., monitoring period of PDCCH) and offset, symbol position in the time slot;

[0057] The monitoring period and offset are used to determine the monitoring period for monitoring PDCCH and the monitoring time slot in the monitoring period during which PDCCH needs to be monitored, wherein the monitoring period may include an integer number of time slots; the symbol position in the time slot is used to determine the starting symbol position of PDCCH in the monitoring time slot.

[0058] 2) Aggregation level and its corresponding number of PDCCH candidates;

[0059] The aggregation level may include at least one of 1, 2, 4, 8, and 16.

[0060] The CORESET of the embodiment of the present application may be configured through high-layer signaling, wherein the configuration information indicated by the high-layer signaling may indicate at least one of the following:

[0061] 1) The location and size of frequency domain resources and the length of time domain

[0062] The location and size of the frequency domain resource are used to determine the location and size of the frequency domain resource for monitoring the PDCCH; and the time domain length is used to determine the number of PDCCH symbols corresponding to monitoring the PDCCH.

[0063] In an embodiment of the present application, a search space set may correspond to one or more CORESETs, and a CORESET may correspond to one or more search space sets.

[0064] In the embodiment of the present application, the terminal device can determine the PDCCH resource location to be monitored based on the search space set and CORESET configured by the high-level signaling. The resource location can be as follows: Figure 2 shown.

[0065] like Figure 2As shown, the resource size of the black filled part is 48 RBs (which can be an integer multiple of 6) in the frequency domain and 2 symbols in the time domain. Since 1 REG (Resource Element, RE) group = 12 subcarriers * 1 symbol, 1 CCE = 6REG, the resources of the above black filled part include 16 CCEs, one of which is the smallest resource unit that can transmit PDCCH. Among them, there can be a mapping relationship between CCE and REG, such as interleaved mapping or non-interleaved mapping.

[0066] In the embodiment of the present application, the aggregation level may refer to a plurality of continuous CCEs used to transmit a PDCCH. For example, an aggregation level of 2 indicates that a PDCCH is transmitted through 2 continuous CCEs, and an aggregation level of 8 indicates that a PDCCH is transmitted through 8 continuous CCEs. Among them, an aggregation level and its corresponding number of PDCCH candidates can be considered to constitute a search space.

[0067] Assume that the CCEs in the above CCE set are numbered from CCE 0 to CCE 15, and the monitoring start position is CCE 0 (the monitoring start position can be determined by formula calculation or by hash function or other methods, here is an example), where for aggregation level 1, there can be 6 PDCCH candidates, for aggregation level 2, there can be 4 PDCCH candidates, for aggregation level 4, there can be 3 PDCCH candidates, for aggregation level 8 and aggregation level 16, there can be 0 PDCCH candidates. Then the number of PDCCH candidates in the search space set is 13, and the number of non-overlapping CCEs that the terminal device needs to monitor is 12, which can be specifically as follows: Figure 3 shown.

[0068] In an embodiment of the present application, a terminal device may be configured with multiple search space sets. The search space set may include a common search space set (CSS set) and a terminal device-specific search space set (USS set, UE-specific search space set). The terminal device may monitor a common PDCCH and / or a dedicated PDCCH through the common search space set, and may monitor a dedicated PDCCH through a terminal device-specific search space set. The network device may ensure that the complexity of blind detection of the common search space set does not exceed the capability of the terminal device.

[0069] The PDCCH of the search space set configured by broadcast information can be mainly used to indicate the reception of system information, random access response and paging message. Due to the limited information carried in the broadcast information, the time domain position, aggregation level, number of candidate control channels, and associated control resource set of this search space set can be configured in a predefined or implicit manner. The aggregation level of the search space set configured by broadcast information can be predefined as {aggregation level 4, aggregation level 8, aggregation level 16}, and the corresponding number of candidate PDCCHs are {4, 2, 1} respectively.

[0070] The above introduces the relevant information of PDCCH in the embodiment of the present application. The following will introduce how the terminal device implements PDCCH monitoring.

[0071] Figure 4 is a schematic flow chart of a wireless communication method for unlicensed spectrum according to an embodiment of the present application. Figure 4 As shown, the method 200 includes at least part of the following contents.

[0072] In 210, the terminal device monitors the target downlink signal.

[0073] In an embodiment of the present application, the target downlink signal may include a common PDCCH, a dedicated PDCCH of the terminal device, or a reference signal. The reference signal may be a channel state information (CSI)-reference signal (RS), a demodulation reference signal (DMRS), a synchronization signal block (SSB), or a phase tracking reference signal (PT-RS).

[0074] Optionally, in an embodiment of the present application, the time resource for the terminal device to monitor the target downlink signal may be a default time resource, or a time resource outside the channel occupancy time of the network device. For example, when the terminal device determines that it is outside the channel occupancy time of the network device, the monitoring behavior of the monitoring target downlink signal may be used. For another example, when the terminal device is not sure whether it is within the channel occupancy time of the network device, the monitoring behavior of the monitoring target downlink signal may be used.

[0075] Optionally, in an embodiment of the present application, the moment when the terminal device monitors the target downlink signal is the first moment.

[0076] Optionally, in an embodiment of the present application, the type of the target downlink signal monitored at the first moment or before the first moment may be a type configured to the terminal device by a network device through high-layer signaling.

[0077] Specifically, the network device can determine the type of target downlink signal that the terminal device needs to monitor at or before the first moment. For example, if the network device wants the terminal device to reduce the power consumed by monitoring the target downlink signal, it can indicate to the terminal device through high-level signaling that the target downlink signal to be monitored is a reference signal.

[0078] Alternatively, in an embodiment of the present application, the type of the target downlink signal may also be preset on the terminal device based on a protocol.

[0079] Optionally, in an embodiment of the present application, the target downlink signal is PDCCH, which means that the target downlink signal is a signal carried in PDCCH, such as downlink control information. And the terminal device monitoring PDCCH at the first moment can be understood as correctly receiving PDCCH at the first moment, wherein correctly receiving PDCCH can be understood as passing the cyclic redundancy check (Cyclic Redundancy Check, CRC) of the PDCCH, wherein the PDCCH received by the UE that passes the CRC check can be a public PDCCH (for example, it can be a group common (Group common GC) PDCCH (GC-PDCCH)), or it can be a PDCCH dedicated to the terminal device.

[0080] In 210, when the target downlink signal is monitored at the first moment, the terminal device monitors the PDCCH from a second moment, and the second moment is later than the first moment. The PDCCH monitored from the second moment can be a PDCCH dedicated to the terminal device or a public PDCCH.

[0081] Optionally, if the terminal device detects the target downlink signal at the first moment, it can be considered that the channel has been occupied by the network device, and PDCCH can be monitored from the second moment; if the target downlink signal is not detected, it can be considered that the channel is not occupied by the network device, and the monitoring behavior of monitoring the target downlink signal can be used to monitor the channel.

[0082] In the implementation of the present application, the duration between the first moment and the second moment can be preset (for example, preset on the terminal device based on the protocol) or configured by the network device (for example, configurable through high-level signaling).

[0083] Alternatively, the duration between the first moment and the second moment may also be determined according to the position of the first moment in the time slot. For example, the duration between the first moment and the second moment is from the first moment to the end position of the time slot where the first moment is located, or from the first moment to the end position of the next time slot after the time slot where the first moment is located.

[0084] Alternatively, in the embodiment of the present application, the duration between the first moment and the second moment may be determined according to a PDCCH, specifically, may be determined according to a group common PDCCH (GC-PDCCH), wherein the PDCCH may be the target downlink signal mentioned in the embodiment of the present application.

[0085] For example, when the system's uplink load is heavy, the network device can send SFI indication information via GC-PDCCH. When the time length of continuous downlink resources within the channel occupancy time of the network device indicated by the SFI indication information is less than or equal to a preset value, the length of the first time period is the time length of the downlink resources.

[0086] Alternatively, in an embodiment of the present application, the duration between the first moment and the second moment may also be determined according to a UE-specific PDCCH, wherein the PDCCH may also be the target downlink signal mentioned in the embodiment of the present application.

[0087] For example, the network device can transmit a downlink authorization via PDCCH, which schedules the terminal device to receive PDSCH. When the time length occupied by the PDSCH indicated by the downlink authorization in the time domain is greater than a preset value, the length of the first time period is the time length occupied by the PDSCH in the time domain.

[0088] Optionally, in an embodiment of the present application, the duration between the first moment and the second moment may be an integer number of time slots, for example, may be equal to one or two time slots; or, the duration between the first moment and the second moment may be a non-integer number of time slots, for example, may be less than 14 symbols, or may be greater than 1 time slot and less than 2 time slots.

[0089] Optionally, in an embodiment of the present application, the first moment and the second moment are the same moment. For example, if the target downlink signal is a reference signal, if the terminal device detects the reference signal at the first moment, it can be considered that the channel has been occupied by the network device, and the PDCCH can be monitored from the first moment. If the reference signal is not detected, it can be considered that the channel is not occupied by the network device, and the monitoring behavior of monitoring the reference signal can be used to monitor the channel.

[0090] Optionally, in an embodiment of the present application, between the first moment and the second moment, the terminal device may not monitor the PDCCH.

[0091] Specifically, in an embodiment of the present application, when the terminal device detects the target downlink signal at the first moment, the terminal device may not monitor the PDCCH between the first moment and the second moment. At this time, no conditions need to be met, and the terminal device does not monitor the PDCCH. Alternatively, between the first moment and the second moment, when certain conditions are met, the terminal device may not monitor the PDCCH, otherwise, it monitors the PDCCH. Wherein, the target downlink signal is a PDCCH dedicated to the terminal device, and the condition may include at least one of the following:

[0092] 1) The end position of the PDSCH scheduled by the PDCCH dedicated to the terminal device is the time slot boundary;

[0093] Specifically, if the end position of the PDSCH scheduled by the PDCCH dedicated to the terminal device is a time slot boundary, it means that the network device can send the PDCCH starting from the next time slot, and the terminal device can monitor the PDCCH starting from the next time slot.

[0094] 2) The duration of the PDSCH scheduled by the PDCCH dedicated to the terminal device is greater than the preset duration;

[0095] Specifically, if the duration of the PDSCH scheduled by the PDCCH dedicated to the terminal device is greater than the preset duration, it indicates that there is enough time between the transmissions of two PDCCHs, and the next PDCCH monitoring can be started.

[0096] 3) The end position of the PDSCH scheduled by the PDCCH dedicated to the terminal device is the second moment;

[0097] Specifically, if the end position of the PDSCH scheduled by the PDCCH dedicated to the terminal device is the second moment when PDCCH monitoring is required, the PDCCH monitoring can be started from this moment.

[0098] 4) The PDCCH to-be-monitored set is included between the first moment and the end position of the PDSCH scheduled by the PDCCH dedicated to the terminal device.

[0099] Specifically, if the terminal device detects a dedicated PDCCH at the first moment, the dedicated PDCCH schedules PDSCH transmission, indicating that the terminal device should perform PDSCH reception on the time resources between the first moment and the end position of the PDSCH. If the time resource includes a PDCCH to-be-monitored set, the PDCCH to-be-monitored set included in the time resource may not be monitored, that is, the next PDCCH monitoring may be started.

[0100] In other words, the period of the PDCCH to be monitored set is M symbols, the number of symbols occupied by the PDSCH scheduled by the dedicated PDCCH of the terminal device is greater than M, and the terminal device may not perform PDCCH monitoring between the first moment and the second moment.

[0101] Optionally, in an embodiment of the present application, between the first moment and the second moment, the terminal device monitors PDCCH.

[0102] Specifically, in the embodiment of the present application, when the terminal device detects the target downlink signal at the first moment, the terminal device can monitor the PDCCH between the first moment and the second moment. At this time, the terminal device can monitor the PDCCH without satisfying any conditions. Alternatively, between the first moment and the second moment, when certain conditions are met, the terminal device can monitor the PDCCH, otherwise, the PDCCH is not monitored. The condition may include one of the following:

[0103] 1) The target downlink signal is a reference signal;

[0104] Specifically, the terminal device uses a reference signal to monitor the target downlink signal. When the network device is detected to be transmitting a downlink reference signal, the terminal device needs to perform blind detection of the PDCCH to determine whether the network device performs downlink scheduling or uplink scheduling on it, or whether to transmit public information.

[0105] 2) The target downlink signal is a public PDCCH;

[0106] Specifically, the public PDCCH can be SFI indication information. After receiving the SFI indication information, the terminal device performs blind detection of the PDCCH according to the time slot format indicated by the SFI indication information to determine whether the network device performs downlink scheduling or uplink scheduling on it, or whether to transmit public information.

[0107] 3) The target downlink signal is a PDCCH dedicated to the terminal device, and the end position of the PDSCH scheduled by the PDCCH dedicated to the terminal device is not a time slot boundary and / or the duration of the scheduled PDSCH is less than or equal to a preset duration. As an example, the preset duration can be an integer number of symbols less than one time slot.

[0108] Specifically, the period of the PDCCH to be monitored set is M symbols, the number of symbols occupied by the PDSCH scheduled by the dedicated PDCCH of the terminal device is less than or equal to M, and the terminal device can perform PDCCH monitoring between the first moment and the second moment.

[0109] Among them, monitoring the PDCCH between the first moment and the second moment may be monitoring the PDCCH only in a partial time period between the first moment and the second moment, for example, the PDCCH may be monitored in a time period between the end position of the PDSCH scheduled by the PDCCH (target downlink signal) dedicated to the terminal device and the second moment.

[0110] Optionally, in an embodiment of the present application, the terminal device correctly receives a PDCCH dedicated to the terminal device at a first moment, and the end position of the PDSCH scheduled by the PDCCH is a third moment, then the terminal device does not perform PDCCH detection between the first moment and the third moment, wherein the third moment may be earlier than or equal to the second moment.

[0111] like Figure 5 As shown, UE1 receives the PDCCH transmitted by the network device for the first time in time slot n+3, and the PDCCH schedules PDSCH, wherein the end position of the PDSCH is the end position of time slot n+3. In this case, after UE1 detects the PDCCH in time slot n+3, it may no longer perform PDCCH detection in the time slot n+3. Furthermore, UE1 may perform PDCCH detection starting from time slot n+4 according to the second PDCCH detection behavior.

[0112] Optionally, in an embodiment of the present application, when the target downlink signal is PDCCH, the terminal device may monitor the PDCCH in monitoring mode 1 at the first moment or before the first moment.

[0113] Optionally, in an embodiment of the present application, the way in which the terminal device monitors PDCCH between the first moment and the second moment is monitoring mode 2.

[0114] Optionally, in an embodiment of the present application, the terminal device monitors PDCCH in monitoring mode 3 from the second moment onwards.

[0115] For the above monitoring mode 1, monitoring mode 2 or monitoring mode 3, a single time unit includes one or more PDCCH to be monitored sets, and the number of PDCCH candidates included in each PDCCH to be monitored set is the same. Among them, the time unit in the embodiment of the present application can be a time slot, a mini-time slot, a subframe or a frame, etc.

[0116] Specifically, under the condition that the maximum number of blind detections of the terminal device in each time slot (ie the maximum number of PDCCH candidates in each time slot) does not exceed the existing capability limit, the number of blind detections is evenly distributed to each PDCCH to be monitored set, which is relatively simple to implement.

[0117] For example, for monitoring mode 1 or monitoring mode 2, the number of blind detections included in each time slot (that is, the number of PDCCH candidates) is N1, and N1 is less than or equal to Nmax (the maximum number of blind detections of the terminal device in each time slot); assuming that each time slot includes M1 PDCCH monitored sets, then the number of blind detections included in each PDCCH monitored set is the same and is P1, where M1*P1 is less than or equal to N1.

[0118] Among them, assuming that the available frequency band can be divided into at least one sub-band, the M1 PDCCH to be monitored sets can be PDCCH to be monitored sets located in the same sub-band but different symbols in each time slot, or PDCCH to be monitored sets located in the same symbol but different sub-bands in each time slot, or can include at least one different PDCCH to be monitored set in the sub-band position and symbol position in each time slot.

[0119] For example, for monitoring mode 3, the number of blind detections included in each time slot is N2, and N2 is less than or equal to Nmax: assuming that each time slot includes M2 PDCCH monitored sets, then the number of blind detections included in each PDCCH monitored set is the same and is P2, where M2*P2 is less than or equal to N2.

[0120] Similarly, assuming that the available frequency band can be divided into at least one sub-band, the M2 PDCCH to-be-monitored sets can be PDCCH to-be-monitored sets located in the same sub-band but different symbols in each time slot, or PDCCH to-be-monitored sets located in the same symbol but different sub-bands in each time slot, or can include at least one different PDCCH to-be-monitored set in the sub-band position and symbol position in each time slot.

[0121] Optionally, N1=N2, that is, the number of blind detections included in each time slot in monitoring mode 1 or monitoring mode 2 is the same as the number of blind detections included in each time slot in monitoring mode 3.

[0122] Similarly, for the above monitoring mode 1, monitoring mode 2 or monitoring mode 3, a single time unit includes one or more PDCCH to-be-monitored sets, and the number of CCEs included in each PDCCH to-be-monitored set is the same.

[0123] Optionally, in an embodiment of the present application, for the above monitoring method 1, monitoring method 2 or monitoring method 3, a single time unit includes multiple PDCCH to be monitored sets, and among the multiple PDCCH to be monitored sets, there are at least two PDCCH to be monitored sets with different numbers of PDCCH candidates included.

[0124] For example, for monitoring mode 1 or monitoring mode 2, one time slot includes two PDCCH monitored sets, wherein the number of blind detections corresponding to one PDCCH monitored set is X, and the number of blind detections corresponding to the other PDCCH monitored set is Y, where X is greater than Y.

[0125] Similarly, for the above monitoring method 1, monitoring method 2 or monitoring method 3, a single time unit includes one or more PDCCH monitored sets. When a single time unit includes multiple PDCCH monitored sets, there are at least two PDCCH monitored sets in which the number of CCEs included is different.

[0126] Optionally, in an embodiment of the present application, for the above monitoring mode 1, monitoring mode 2 and monitoring mode 3, the number of PDCCH candidates (or the number of CCEs) included in a single time slot corresponding to one monitoring mode or the number of PDCCH candidates (or the number of CCEs) included in the PDCCH set to be monitored can be determined according to the number of PDCCH candidates (or the number of CCEs) included in a single time slot corresponding to other monitoring modes or the number of PDCCH candidates (or the number of CCEs) included in the PDCCH set to be monitored.

[0127] For example, for monitoring mode 1 and monitoring mode 2, assuming that each time slot includes M1 PDCCHs to be monitored sets, then the number of PDCCH blind detections corresponding to each PDCCH to be monitored set is the same and is P1; for monitoring mode 3, assuming that each time slot includes M2 PDCCHs to be monitored sets, then the number of blind detections included in each PDCCH to be monitored set is the same and is P1, and the number of blind detections included in each time slot corresponding to monitoring mode 1 and / or monitoring mode 2 is greater than the number of blind detections included in each time slot corresponding to monitoring mode 3.

[0128] It should be understood that in the embodiments of the present application, the above monitoring mode 1, monitoring mode 2 and monitoring mode 3 may be the same monitoring mode or different monitoring modes. Alternatively, monitoring mode 1 is the same as monitoring mode 2, but different from monitoring mode 3. Alternatively, monitoring mode 2 is the same as monitoring mode 3, but different from monitoring mode 1.

[0129] The monitoring method for monitoring PDCCH in an embodiment of the present application may indicate at least one of the following aspects: the period of monitoring PDCCH, the number of PDCCHs to be monitored included in a single time unit, the number of PDCCH candidates included in the PDCCH to be monitored set, the resource locations of the PDCCH candidates included in the PDCCH to be monitored set, the number of CCEs included in the PDCCH to be monitored set, the resource locations of the CCEs included in the PDCCH to be monitored set, the number of PDCCH candidates included in a single time unit, the resource locations of the PDCCH candidates included in a single time unit, the number of CCE resources included in a single time unit, and the resource locations of the CCEs included in a single time unit.

[0130] Optionally, in an embodiment of the present application, the PDCCH to-be-monitored set may include multiple CCEs, and the multiple CCEs may be composed of at least one PDCCH candidate.

[0131] Optionally, in an embodiment of the present application, a single PDCCH to-be-monitored set may include at least one search space set.

[0132] A group of search space sets may include one or more search space sets.

[0133] Optionally, in an embodiment of the present application, the PDCCH to-be-monitored set may include a terminal device-specific search space set and / or a common search space set.

[0134] For example, the search space sets configured for the terminal device include search space sets 0, 5, and 6, where search space set 0 is a public search space set, search space sets 5 and 6 are terminal device-specific search space sets, and the PDCCH to-be-monitored set includes search space sets 5 and 6.

[0135] Alternatively, in an embodiment of the present application, a group of search space sets on a single time unit is divided into at least one of the PDCCH to-be-monitored sets.

[0136] Optionally, in an embodiment of the present application, a single PDCCH to-be-monitored set corresponds to at least one control resource set (CORESET) with the same time domain position.

[0137] For example, in the frequency domain, the available frequency band may be divided into multiple sub-bands, each sub-band is respectively configured with a CORESET, and then a single PDCCH to-be-monitored set corresponds to multiple CORESETs with the same time domain position.

[0138] Alternatively, in the frequency domain, the available frequency band may be divided into a plurality of sub-bands, each sub-band is respectively configured with a CORESET, and a single PDCCH to-be-monitored set corresponds to a CORESET on a sub-band.

[0139] Optionally, in an embodiment of the present application, the PDCCH candidates included in the PDCCH to-be-monitored set may refer to the PDCCH candidates configured by the network device for monitoring, or may be the PDCCH candidates that the terminal needs to actually monitor (for example, the terminal device may determine the PDCCH candidates that need to be actually monitored based on its own capabilities or the limitations shown in Table 1), or may be the maximum number of PDCCH candidates obtained based on all CCEs included in the PDCCH to-be-monitored set.

[0140] Optionally, in an embodiment of the present application, the CCEs included in the PDCCH to-be-monitored set may refer to all CCEs constituting the PDCCH to-be-monitored set.

[0141] Optionally, in an embodiment of the present application, the CCEs included in the PDCCH to-be-monitored set may refer to all CCEs corresponding to the PDCCH candidates included in the PDCCH to-be-monitored set.

[0142] In the embodiment of the present application, the time domain lengths occupied by multiple PDCCH to-be-monitored sets included in a single time unit may be the same or different.

[0143] The following assumes that the method of monitoring PDCCH between the first moment and the second moment, and / or the method of monitoring PDCCH at the first moment is a first monitoring method; and from the second moment onwards, the method of monitoring PDCCH is a second monitoring method, and the first monitoring method is different from the second monitoring method.

[0144] Optionally, in an embodiment of the present application, the first monitoring mode and the second monitoring mode are different in at least one of the following aspects 1)-10):

[0145] 1) Monitoring period of PDCCH

[0146] A period for monitoring PDCCH may include one or more time units, wherein the time unit mentioned in the embodiment of the present application may be a time slot, a mini-time slot, a subframe or a frame, etc. The period for monitoring PDCCH mentioned here may be as follows: Figure 2 The monitoring cycle is shown.

[0147] The monitoring period of the first monitoring mode may be less than or equal to the monitoring period of the second monitoring mode. For example, the monitoring period of the first monitoring mode is a mini-time slot, and the monitoring period of the second monitoring mode is a time slot.

[0148] 2) The number of PDCCH sets to be monitored in a single time unit

[0149] A time unit may include one or more PDCCH to be monitored sets, wherein the first monitoring

[0150] In the first monitoring mode, the number of PDCCH to-be-monitored sets included in one time unit may be greater than or equal to the number of PDCCH to-be-monitored sets included in one time unit in the second monitoring mode.

[0151] For the same monitoring mode, the number of PDCCH candidates and / or CCEs in the PDCCH to-be-monitored set included in one time unit may be the same or different.

[0152] Alternatively, for the same monitoring mode, among the PDCCH to-be-monitored sets included in one time unit, there are at least two PDCCH to-be-monitored sets including different numbers of PDCCH candidates and / or CCEs.

[0153] 3) Number of PDCCH candidates included in the PDCCH to-be-monitored set

[0154] One time unit includes one or more PDCCH to-be-monitored sets, and the number of PDCCH candidates included in the PDCCH to-be-monitored sets corresponding to different monitoring modes may be different.

[0155] For example, for the first monitoring mode, it includes three PDCCH to be monitored sets, and the number of PDCCH candidates included in the three PDCCH to be monitored sets is 5, 6 and 8 respectively, and for the second monitoring mode, it also includes three PDCCH to be monitored sets, and the number of PDCCH candidates included in the three PDCCH to be monitored sets is 6. It can be considered that under the two monitoring modes, the number of PDCCH candidates included in the PDCCH to be monitored sets is different.

[0156] 4) Resource locations of PDCCH candidates included in the PDCCH to-be-monitored set

[0157] The resource locations of the PDCCH candidates included in the PDCCH to-be-monitored set may include at least one of the frequency domain and the time domain.

[0158] Under different monitoring modes, the resource positions of the PDCCH candidates included in the PDCCH to-be-monitored set are different, which may refer to different time domain and / or frequency domain positions, wherein different time domain positions may refer to different positions (specifically, symbol positions) of the time domain resources occupied by the PDCCH candidate in a time unit such as a time slot.

[0159] 5) Number of CCEs included in the PDCCH to-be-monitored set

[0160] A PDCCH to-be-monitored set may include one or more CCEs. The number of CCEs included in the PDCCH to-be-monitored set corresponding to different monitoring modes may be different.

[0161] For example, for the first monitoring mode, it includes three PDCCH monitored sets, and the number of CCEs included in the three PDCCH monitored sets are 10, 12 and 8 respectively, and for the second monitoring mode, it also includes three PDCCH monitored sets, and the number of PDCCH candidates included in the three PDCCH monitored sets is 10. It can be considered that under the two monitoring modes, the number of CCEs included in the PDCCH monitored sets is different.

[0162] 6) Resource location of CCEs included in the PDCCH to-be-monitored set

[0163] Under different monitoring modes, the resource positions of the CCEs included in the PDCCH monitored set are different, which may refer to different time domain and / or frequency domain positions, wherein different time domain positions may refer to different positions (specifically, symbol positions) of the time domain resources occupied by the CCE in time units such as time slots.

[0164] 7) Number of PDCCH candidates included in a single time unit

[0165] For different monitoring modes, the number of PDCCH candidates included in one time unit is different.

[0166] 8) Resource location of PDCCH candidates included in a single time unit

[0167] Under different monitoring modes, the resource positions of the PDCCH candidates included in a time unit are different, which may refer to different time domain and / or frequency domain positions, wherein different time domain positions may refer to different positions (specifically, symbol positions) of the time domain resources occupied by the PDCCH candidate in the time unit, such as the time slot.

[0168] 9) Number of CCE resources included in a single time unit

[0169] For different monitoring modes, the number of CCE resources included in a time unit is different. In one implementation, the CCEs included in a single time unit in the second monitoring mode may be a subset of the CCEs included in a single time unit in the first monitoring mode.

[0170] 10) Resource location of CCEs included in a single time unit.

[0171] Under different monitoring modes, the resource position of the CCE included in a time unit is different, which may refer to different time domain and / or frequency domain positions, wherein the different time domain positions may refer to different positions (specifically, symbol positions) of the time domain resources occupied by the CCE in the time unit, such as the time slot.

[0172] The above describes the differences between the first monitoring mode and the second monitoring mode. The following describes the relationship between the first monitoring mode and the second monitoring mode by way of example.

[0173] Before introducing the first monitoring method and the second monitoring method, for ease of understanding, Figure 5 An example of downlink transmission performed by a base station is described.

[0174] In the unlicensed spectrum, the base station needs to perform LBT before sending PDCCH. Only when LBT succeeds can the transmission be carried out. Otherwise, the transmission cannot be carried out. Therefore, the transmission in the unlicensed spectrum is opportunistic. In order to enable the base station to use the unlicensed spectrum resources for PDCCH transmission as soon as possible, one way is that the base station uses a smaller time granularity, such as a micro-time slot with a length of 2 symbols, to prepare and transmit PDCCH when seizing the channel, and uses a larger time granularity, such as a time slot, to prepare and transmit PDCCH during the channel occupation time after seizing the channel. Figure 5 As shown in Figure 1, the scheduling behavior of the base station includes the following stages:

[0175] Phase A: outside the base station's channel occupation time, the base station uses a smaller time granularity to prepare data for transmission; Phase B: during the initial phase of the base station's channel occupation time, the base station uses a smaller time granularity for data transmission; Phase C: during the base station's channel occupation time, except for the initial phase, the base station uses a larger time granularity for data transmission;

[0176] Accordingly, the PDCCH blind detection behavior of the terminal device also includes the following stages:

[0177] Phase A: Except for the base station's channel occupation time, the terminal device uses a smaller time granularity for PDCCH detection. Phase B: During the initial stage of the base station's channel occupation time, the terminal device uses a smaller time granularity for PDCCH detection. Phase C: Except for the initial stage of the base station's channel occupation time, the terminal device uses a larger time granularity for PDCCH detection.

[0178] Specifically, the base station can configure two PDCCH monitoring periods for the terminal device, wherein one PDCCH monitoring period is smaller, such as a mini-time slot, and the other PDCCH monitoring period is larger, such as a time slot. In phase A and phase B, the terminal device performs PDCCH detection according to the PDCCH monitoring period corresponding to the mini-time slot, and in phase C, the terminal device performs PDCCH detection according to the PDCCH monitoring period corresponding to the time slot. In this way, it can not only ensure that the base station can perform downlink transmission as soon as possible after seizing the channel, but also reduce the detection complexity of the terminal device during the base station channel occupation time.

[0179] However, the phase B considered by the network side may be different from the phase B considered by the terminal side. For example, in order to ensure the reliability of the terminal device's judgment that the base station starts to transmit signals, the terminal device may consider that the base station starts to send downlink signals only after correctly receiving the PDCCH (i.e., the CRC check of the PDCCH passes). Since not all UEs can receive the PDCCH at the beginning of phase B on the network side, the various phases considered by the UE and the various phases considered by the network device may be different. For example, Figure 5 As shown, the network side considers that phase A includes the time slots before time slot n that have not seized the channel resources, phase B includes time slot n, and phase C includes time slots n+1 to time slots n+6. However, for UE1, UE1 receives the PDSCH scheduled by the network device for the first time at time slot n+3 during the channel occupation time of the base station. Therefore, UE1 considers that phase A includes the time slots before time slot n+3 that have not received the downlink signal, phase B includes time slot n+3, and phase C includes time slots n+4 to time slots n+6. In other words, the switching of UE1 from the first monitoring mode (applicable to phase A and phase B) to the second monitoring mode (applicable to phase C) starts from time slot n+4.

[0180] It should be understood that switching between the first monitoring mode and the second monitoring mode of the UE should not affect the PDSCH reception of the UE. In other words, when the network device transmits PDCCH when assuming that the UE is monitoring PDCCH according to the second monitoring mode, the UE can also correctly receive the PDCCH transmitted by the network device when monitoring according to the first monitoring mode.

[0181] Therefore, the PDCCH resources monitored by the second monitoring mode in a single time unit are a subset of the PDCCH resources monitored by the first monitoring mode in a single time unit.

[0182] from Figure 5It can be seen that the PDCCH time domain detection density of the terminal device in different time slots is different. For example, the detection density in phase A and phase B is higher than that in phase C. As can be seen from Table 1, the maximum number of blind detections of the terminal device in each time slot (i.e., the maximum number of PDCCH candidates in each time slot) is limited. The maximum number of CCE detections of the terminal device in each time slot (i.e., the number of CCEs required for channel estimation in each time slot) is also limited.

[0183] Assuming that the maximum number of PDCCH candidates in each time slot is 36, in phase A or phase B, each time slot includes 6 PDCCH sets to be monitored, and in phase C, each time slot includes 1 PDCCH set to be monitored. If the number of blind detections is evenly distributed to the sets to be monitored, then, in phase A or phase B, the maximum number of blind detections corresponding to each PDCCH set to be monitored is 6, and in phase C, the maximum number of blind detections corresponding to each PDCCH set to be monitored is 36. Since the phases A, B, and C considered by the network device and the phases A, B, and C considered by the terminal device may be inconsistent, such as Figure 6 As shown, if the network device uses one of the last 30 PDCCH candidates (i.e., the last 30 blind detections) in the PDCCH to be monitored set on time slot n+3 to schedule UE1, since UE1 only detects 6 times in the PDCCH to be monitored set (UE1 believes that it belongs to phase A), UE1 cannot receive the PDCCH scheduled by the network device. That is, even if the PDCCH detection resources corresponding to phase A or phase B are a subset of the PDCCH detection resources corresponding to phase C, the terminal device may still not receive the PDCCH scheduled by the network device in phase C using the PDCCH monitoring method corresponding to phase A or phase B.

[0184] Therefore, the blind detection performed in stage C can be a subset of the blind detection performed in stage A / B, that is, the PDCCH candidates monitored in stage C are a subset of the PDCCH candidates monitored in stage A / B, thereby ensuring that when the base station assumes that the UE sends PDCCH according to the second monitoring method, the UE can detect the PDCCH sent by the base station according to the first monitoring method.

[0185] Optionally, in an embodiment of the present application, the PDCCH candidates included in the PDCCH monitored set under the second monitoring mode is a subset of the PDCCH candidates included in the PDCCH monitored set under the first monitoring mode, or the CCE included in the PDCCH monitored set under the second monitoring mode is a subset of the CCE included in the PDCCH monitored set under the first monitoring mode.

[0186] Optionally, in an embodiment of the present application, the PDCCH candidates included in the second monitoring mode in a single time unit are a subset of the PDCCH candidates included in the first monitoring mode in a single time unit, or the CCE included in the second monitoring mode in a single time unit is a subset of the CCE included in the first monitoring mode in a single time unit.

[0187] Optionally, in an embodiment of the present application, the PDCCH candidates included in the first aggregation level in a single time unit by the second monitoring mode are a subset of the PDCCH candidates included in the first aggregation level in a single time unit by the first monitoring mode.

[0188] Optionally, in an embodiment of the present application, the PDCCH to-be-monitored set included in a single time unit under the second monitoring mode is at least part of the PDCCH to-be-monitored set included in a single time unit under the first monitoring mode.

[0189] Optionally, the at least part of the PDCCH to be monitored set is: the PDCCH to be monitored set that includes the largest number of PDCCH candidates in the PDCCH to be monitored set included in a single time unit under the first monitoring mode. Alternatively, the at least part of the PDCCH to be monitored set is: the PDCCH to be monitored set that includes the largest number of CCEs in the PDCCH to be monitored set included in a single time unit under the first monitoring mode.

[0190] Optionally, under the first monitoring mode, the PDCCH to be monitored set included in a single time unit includes a first group of PDCCH candidate sets and a second group of PDCCH candidate sets; under the second monitoring mode, the PDCCH to be monitored set included in a single time unit includes the first group of PDCCH candidate sets.

[0191] For example, for the first monitoring mode, it is assumed that each time slot includes a first PDCCH to be monitored set and a second PDCCH to be monitored set, wherein the number of blind detections included in the first PDCCH to be monitored set is X, and the number of blind detections included in the second PDCCH to be monitored set is Y; for the second monitoring mode, it is assumed that each time slot includes a first PDCCH to be monitored set, and the number of blind detections included in the first PDCCH to be monitored set is X, and the number of blind detections included in each time slot under the first monitoring mode is greater than the number of blind detections included in each time slot under the second monitoring mode. Optionally, X is greater than Y.

[0192] Optionally, the PDCCH candidates included in each PDCCH to-be-monitored set corresponding to the second monitoring mode are a subset of the PDCCH candidates included in each PDCCH to-be-monitored set corresponding to the first monitoring mode. That is, the P2 mentioned above is less than or equal to P1.

[0193] For example, in Figure 6 In the example shown, the maximum number of blind detections corresponding to each PDCCH to be monitored set in stage C is less than or equal to 6. Taking the number of blind detections as 6 as an example, the network device also uses one of the 6 PDCCH candidates in the PDCCH to be monitored set on time slot n+3 to schedule UE1, and UE1 can still correctly receive the PDCCH when detecting according to the first monitoring method.

[0194] Optionally, the PDCCH candidates included in the first aggregation level in each PDCCH to-be-monitored set corresponding to the second monitoring mode are a subset of the PDCCH candidates included in the first aggregation level in each PDCCH to-be-monitored set corresponding to the first monitoring mode.

[0195] For example, in phase A or phase B, the number of PDCCH candidates corresponding to the aggregation level 4 in each PDCCH to be monitored set is 6, and in phase C, the number of PDCCH candidates corresponding to the aggregation level 4 in each PDCCH to be monitored set is less than or equal to 6.

[0196] However, this method will have a new problem, that is, in the stage corresponding to the second monitoring method, the number of PDCCH candidates that the network device can use is limited. Since the network device needs to perform PDCCH scheduling for multiple UEs, the network device usually multiplexes the PDCCHs of multiple UEs on CCE resources with adjacent locations. This situation will increase the collision probability when the network device schedules the PDCCH of the UE, thereby increasing the scheduling requirements of the network device.

[0197] Therefore, the number of blind detections in the multiple PDCCH to-be-monitored sets included in each time slot may be non-evenly distributed to solve the collision problem that may occur when the network device schedules the PDCCH.

[0198] For example, for the second monitoring mode, the number of blind detections included in each time slot is N2, N2 is less than or equal to Nmax, assuming that each time slot includes a first group of PDCCHs to be monitored, the number of blind detections included in the first group of PDCCHs to be monitored is X, where X is less than or equal to N2.

[0199] If the first group of PDCCH to-be-monitored sets includes at least two PDCCH to-be-monitored sets, then the number of blind detections included in each of the at least two PDCCH to-be-monitored sets is the same.

[0200] For the first PDCCH monitoring mode, the number of blind detections included in each time slot is N1, and N1 is less than or equal to Nmax; assuming that each time slot includes a first group of PDCCH to be monitored sets and a second group of PDCCH to be monitored sets, wherein the number of blind detections included in the first group of PDCCH to be monitored sets is X, and the number of blind detections included in the second PDCCH to be monitored sets is Y; if the second group of PDCCH to be monitored sets includes at least two PDCCH to be monitored sets, then the number of blind detections included in each PDCCH to be monitored set in the at least two PDCCH to be monitored sets is the same. Optionally, X is greater than Y.

[0201] Optionally, the number of blind detections included in each time slot in the first monitoring mode is different from the number of blind detections included in each time slot in the second monitoring mode. For example, the number of blind detections included in each time slot in the first monitoring mode is greater than the number of blind detections included in each time slot in the second monitoring mode, or in other words, N2 is less than N1 and less than or equal to Nmax.

[0202] Optionally, in an embodiment of the present application, a PDCCH to-be-monitored set may include at least one set of search spaces.

[0203] Optionally, the PDCCH candidates included in the first search space in each PDCCH to-be-monitored set corresponding to the second monitoring mode are a subset of the PDCCH candidates included in the first search space in each PDCCH to-be-monitored set corresponding to the first monitoring mode.

[0204] Figure 7 An example of allocating the number of PDCCH blind detections corresponding to different monitoring methods is given. Figure 7 As shown, the first monitoring mode includes detection of the first search space set, and the second monitoring mode includes detection of the second search space set, wherein the detection granularity of the first search space set in the time domain is 6 PDCCH sets to be monitored per time slot, and the detection granularity of the second search space set in the time domain is 1 PDCCH set to be monitored per time slot. Among them, the PDCCH set to be monitored included in each time slot of the second search space set is the first PDCCH set to be monitored among the 6 PDCCH sets to be monitored included in each time slot of the first search space set. Therefore, when the network device allocates the number of blind detections, the same X blind detections are allocated to the first PDCCH set to be monitored included in each time slot of the first search space set and the PDCCH set to be monitored included in each time slot of the second search space set. The network device allocates the same number of Y blind detections to each PDCCH set to be monitored in the remaining 5 PDCCH sets to be monitored except the first one included in each time slot of the first search space set. Among them, X+5*Y is less than or equal to Nmax.

[0205] Optionally, in an embodiment of the present application, a group of search space sets may be divided into multiple PDCCH to-be-monitored sets, wherein the number of PDCCH candidates included in the multiple PDCCH to-be-monitored sets may be the same or different.

[0206] Figure 8 Another example of allocating the number of PDCCH blind detections corresponding to different PDCCH monitoring modes is given. Figure 8 As shown, the first monitoring method includes monitoring the first search space set and the second search space set, and the second monitoring method includes monitoring the first search space set, wherein the detection granularity of the first search space set in the time domain is 1 PDCCH to be monitored set per time slot, and the detection granularity of the second search space set in the time domain is 5 PDCCH to be monitored sets per time slot. Among them, the network device allocates X blind detections on each PDCCH to be monitored set included in each time slot in the first search space set, and allocates Y blind detections on each PDCCH to be monitored set included in each time slot in the second search space set. The number of blind detections in the time slot corresponding to the first PDCCH detection behavior is X+5*Y, and X+5*Y is less than or equal to Nmax.

[0207] Figure 8 An example of a first search space set and a second search space set is given. It should be understood that there may be other examples of the first search space set and the second search space set, and the present application does not limit this. For example, the ID number of the first search space set is smaller than the ID number of the second search space set, or in other words, the priority of the first search space set is higher than the priority of the second search space set, and the monitoring period of the first search space set may be greater than the monitoring period of the second search space set, wherein the CCE included in the first search space set and the CCE included in the second search space set may overlap or may not overlap. The terminal device monitors the first search space set and the second search space set in the first monitoring mode, and monitors the first search space set in the second monitoring mode, which can ensure that the first search space set can be monitored in different stages.

[0208] Optionally, in an embodiment of the present application, the terminal device may determine the first monitoring mode and the second monitoring mode based on the configuration information sent by the network device.

[0209] For example, Fig. 9 In the method 300 shown, the network device may send first configuration information to the terminal device, and the first configuration information may be used by the terminal device to determine a first monitoring mode and a second monitoring mode.

[0210] Optionally, in an embodiment of the present application, the first configuration information includes configuration information of a PDCCH to-be-monitored set.

[0211] In an embodiment of the present application, the network device may also send second configuration information to the terminal device, and the second configuration information may indicate the type of the target downlink signal. The first configuration information and the second configuration information may be carried in the same signaling or in different signaling.

[0212] It should be understood that there is no order in which the network device sends the first configuration information and the second configuration information. The network device may send the first configuration information first, or the second configuration information first, or send the first configuration information and the second configuration information at the same time, which is not limited in this application.

[0213] Fig.10 is a schematic block diagram of a terminal device 400 for unlicensed spectrum according to an embodiment of the present application. Fig.10 As shown, the terminal device 400 includes a communication unit 410, which is used to:

[0214] Monitor the target downlink signal;

[0215] In the case where the target downlink signal is monitored at a first time, a physical downlink control channel PDCCH is monitored starting from a second time, and the second time is later than the first time.

[0216] Optionally, in an embodiment of the present application, the target downlink signal includes a dedicated PDCCH, a public PDCCH or a reference signal of the terminal device.

[0217] Optionally, in an embodiment of the present application, the type of the target downlink signal monitored at the first moment is configured to the terminal device by a network device through high-layer signaling.

[0218] Optionally, in the embodiment of the present application, the communication unit 410 is further configured to:

[0219] Between the first time instant and the second time instant, the PDCCH is not monitored.

[0220] Optionally, in the embodiment of the present application, the communication unit 410 is further configured to:

[0221] The target downlink signal is a PDCCH, and when the following conditions are met, the PDCCH is not monitored between the first time and the second time:

[0222] The end position of the physical downlink shared channel PDSCH scheduled by the PDCCH is a time slot boundary; and / or,

[0223] The duration of the PDSCH scheduled by the PDCCH is greater than a preset duration; and / or,

[0224] The end position of the PDSCH scheduled by the PDCCH is the second time; and / or,

[0225] The PDCCH to-be-monitored set is included between the first moment and the end position of the PDSCH scheduled by the PDCCH dedicated to the terminal device.

[0226] Optionally, in the embodiment of the present application, the communication unit 410 is further configured to:

[0227] Between the first time instant and the second time instant, the PDCCH is monitored.

[0228] Optionally, in the embodiment of the present application, the communication unit 410 is further configured to:

[0229] When the following conditions are met, between the first time instant and the second time instant, the device monitors the PDCCH:

[0230] The target downlink signal is a reference signal; or

[0231] The target downlink signal is a common PDCCH; or,

[0232] The target downlink signal is a PDCCH dedicated to the terminal device, and the end position of the PDSCH scheduled by the PDCCH dedicated to the terminal device is not a time slot boundary and / or the duration of the scheduled PDSCH is less than or equal to a preset duration.

[0233] Optionally, in an embodiment of the present application, the way in which the communication unit 410 monitors PDCCH between the first moment and the second moment is a first monitoring mode, and the way in which the communication unit 410 monitors PDCCH from the second moment onwards is a second monitoring mode, and the first monitoring mode is different from the second monitoring mode.

[0234] Optionally, in an embodiment of the present application, the target downlink signal is PDCCH, the way in which the communication unit monitors the target downlink signal is a first monitoring way, the way in which the communication unit monitors PDCCH from the second moment is a second monitoring way, and the first monitoring way is different from the second monitoring way.

[0235] Optionally, in the embodiment of the present application, the first monitoring mode and the second monitoring mode are different in at least one of the following aspects:

[0236] The period of monitoring PDCCH, the number of PDCCH to be monitored sets included in a single time unit, the number of PDCCH candidates included in the PDCCH to be monitored set, the resource positions of the PDCCH candidates included in the PDCCH to be monitored set, the number of control channel elements CCE included in the PDCCH to be monitored set, the resource positions of the CCE included in the PDCCH to be monitored set, the number of PDCCH candidates included in a single time unit, the resource positions of the PDCCH candidates included in a single time unit, the number of CCE resources included in a single time unit, and the resource positions of the CCE included in a single time unit.

[0237] Optionally, in an embodiment of the present application, the PDCCH candidates included in a single time unit under the second monitoring mode are a subset of the PDCCH candidates included in a single time unit under the first monitoring mode.

[0238] Optionally, in an embodiment of the present application, the CCE included in a single time unit under the second monitoring mode is a subset of the CCE included in a single time unit under the first monitoring mode.

[0239] Optionally, in an embodiment of the present application, the PDCCH to-be-monitored set included in a single time unit under the second monitoring mode is at least part of the PDCCH to-be-monitored set included in a single time unit under the first monitoring mode.

[0240] Optionally, in an embodiment of the present application, the at least part of the PDCCH to-be-monitored set is: the PDCCH to-be-monitored set including the largest number of PDCCH candidates in the PDCCH to-be-monitored set included in a single time unit under the first monitoring mode.

[0241] Optionally, in an embodiment of the present application, the at least part of the PDCCH to-be-monitored set is: the PDCCH to-be-monitored set including the largest number of CCEs in the PDCCH to-be-monitored set included in a single time unit under the first monitoring mode.

[0242] Optionally, in an embodiment of the present application, under the first monitoring mode, the PDCCH to be monitored set included in a single time unit includes a first group of PDCCH candidate sets and a second group of PDCCH candidate sets; under the second monitoring mode, the PDCCH to be monitored set included in a single time unit includes the first group of PDCCH candidate sets.

[0243] Optionally, in an embodiment of the present application, the number of PDCCH candidates in a single time unit under the first monitoring mode is equal to or greater than the number of PDCCH candidates in a single time unit under the second monitoring mode.

[0244] Optionally, in an embodiment of the present application, the number of CCEs in a single time unit under the first monitoring mode is equal to or greater than the number of CCEs in a single time unit under the second monitoring mode.

[0245] Optionally, in an embodiment of the present application, under the first monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and the number of PDCCH candidates included in each PDCCH to-be-monitored set is the same.

[0246] Optionally, in an embodiment of the present application, under the first monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and the number of CCEs included in each PDCCH to-be-monitored set is the same.

[0247] Optionally, in an embodiment of the present application, under the first monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and among the multiple PDCCH to-be-monitored sets, there are at least two PDCCH to-be-monitored sets including different numbers of PDCCH candidates.

[0248] Optionally, in an embodiment of the present application, under the first monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and among the multiple PDCCH to-be-monitored sets, there are at least two PDCCH to-be-monitored sets that include different numbers of CCEs.

[0249] Optionally, in an embodiment of the present application, under the second monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and the number of PDCCH candidates included in each PDCCH to-be-monitored set is the same.

[0250] Optionally, in an embodiment of the present application, under the second monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and the number of CCEs included in each PDCCH to-be-monitored set is the same.

[0251] Optionally, in the embodiment of the present application, a single PDCCH to-be-monitored set includes at least one set of search space sets; or,

[0252] A single PDCCH to-be-monitored set corresponds to at least one control resource set with the same time domain position; or

[0253] A group of search space sets in a single time unit is divided into at least one PDCCH to-be-monitored set.

[0254] Optionally, in an embodiment of the present application, the duration between the first moment and the second moment is preset, configured by a network device, or determined based on a PDCCH.

[0255] Optionally, in an embodiment of the present application, the duration between the first moment and the second moment is less than or equal to one time slot, or less than or equal to two time slots.

[0256] It should be understood that the terminal device 400 can be used to implement the corresponding operations implemented by the terminal device in the above method embodiment, and for the sake of brevity, they are not described here.

[0257] Fig.11 1 is a schematic block diagram of a network device 500 for unlicensed spectrum according to an embodiment of the present application. The communication unit 510 of the network device 500 is used to:

[0258] A first configuration information is sent to a terminal device, where the first configuration information is used by the terminal device to determine a first monitoring behavior and a second monitoring behavior, wherein the first monitoring behavior is different from the second monitoring behavior; the second monitoring behavior is a behavior of monitoring PDCCH from a second moment onwards when a target downlink signal is monitored at a first moment; the first monitoring behavior is a behavior of monitoring PDCCH between the first moment and the second moment, or the first monitoring behavior is a behavior of monitoring the target downlink signal before the first moment when the target downlink signal is PDCCH.

[0259] Optionally, in the embodiment of the present application, the communication unit 510 is further configured to:

[0260] Sending second configuration information to the terminal device, where the second configuration information is used to indicate the type of the target downlink signal monitored by the terminal device before the first moment.

[0261] Optionally, in an embodiment of the present application, the target downlink signal includes a dedicated PDCCH, a public PDCCH or a reference signal of the terminal device.

[0262] Optionally, in the embodiment of the present application, the first monitoring mode and the second monitoring mode are different in at least one of the following aspects:

[0263] The period of monitoring PDCCH, the number of PDCCH to be monitored sets included in a single time unit, the number of PDCCH candidates included in the PDCCH to be monitored set, the resource positions of the PDCCH candidates included in the PDCCH to be monitored set, the number of CCEs included in the PDCCH to be monitored set, the resource positions of the CCEs included in the PDCCH to be monitored set, the number of PDCCH candidates included in a single time unit, the resource positions of the PDCCH candidates included in a single time unit, the number of CCE resources included in a single time unit, and the resource positions of the CCEs included in a single time unit.

[0264] Optionally, in an embodiment of the present application, the PDCCH candidates included in a single time unit under the second monitoring mode are a subset of the PDCCH candidates included in a single time unit under the first monitoring mode.

[0265] Optionally, in an embodiment of the present application, the CCE included in a single time unit under the second monitoring mode is a subset of the CCE included in a single time unit under the first monitoring mode.

[0266] Optionally, in an embodiment of the present application, the PDCCH to-be-monitored set included in a single time unit under the second monitoring mode is at least part of the PDCCH to-be-monitored set included in a single time unit under the first monitoring mode.

[0267] Optionally, in an embodiment of the present application, the at least part of the PDCCH to-be-monitored set is: the PDCCH to-be-monitored set including the largest number of PDCCH candidates in the PDCCH to-be-monitored set included in a single time unit under the first monitoring mode.

[0268] Optionally, in an embodiment of the present application, the at least part of the PDCCH to-be-monitored set is: the PDCCH to-be-monitored set including the largest number of CCEs in the PDCCH to-be-monitored set included in a single time unit under the first monitoring mode.

[0269] Optionally, in an embodiment of the present application, under the first monitoring mode, the PDCCH to be monitored set included in a single time unit is a first group of PDCCH candidate set and a second group of PDCCH candidate set; under the second monitoring mode, the PDCCH to be monitored set included in a single time unit is the first group of PDCCH candidate set.

[0270] Optionally, in an embodiment of the present application, the number of PDCCH candidates in a single time unit under the first monitoring mode is equal to or greater than the number of PDCCH candidates in a single time unit under the second monitoring mode.

[0271] Optionally, in an embodiment of the present application, the number of CCEs in a single time unit under the first monitoring mode is equal to or greater than the number of CCEs in a single time unit under the second monitoring mode.

[0272] Optionally, in an embodiment of the present application, under the first monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and the number of PDCCH candidates included in each PDCCH to-be-monitored set is the same.

[0273] Optionally, in an embodiment of the present application, under the first monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and the number of CCEs included in each PDCCH to-be-monitored set is the same.

[0274] Optionally, in an embodiment of the present application, under the first monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and among the multiple PDCCH to-be-monitored sets, there are at least two PDCCH to-be-monitored sets including different numbers of PDCCH candidates.

[0275] Optionally, in an embodiment of the present application, under the first monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and among the multiple PDCCH to-be-monitored sets, there are at least two PDCCH to-be-monitored sets that include different numbers of CCEs.

[0276] Optionally, in an embodiment of the present application, under the second monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and the number of PDCCH candidates included in each PDCCH to-be-monitored set is the same.

[0277] Optionally, in an embodiment of the present application, under the second monitoring mode, a single time unit includes multiple PDCCH to-be-monitored sets, and the number of CCEs included in each PDCCH to-be-monitored set is the same.

[0278] Optionally, in the embodiment of the present application, a single PDCCH to-be-monitored set includes at least one set of search space sets; or,

[0279] A single PDCCH to-be-monitored set corresponds to at least one control resource set with the same time domain position; or

[0280] A group of search space sets in a single time unit is divided into at least one PDCCH to-be-monitored set.

[0281] It should be understood that the network device 500 can be used to implement the corresponding operations implemented by the network device in the above method embodiment, and for the sake of brevity, they are not described here in detail.

[0282] Fig.12 It is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. Fig.12 The communication device 600 shown includes a processor 610, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0283] Alternatively, if Fig.12 As shown, the communication device 600 may further include a memory 620. The processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.

[0284] The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

[0285] Alternatively, if Fig.12 As shown, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0286] The transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include an antenna, and the number of the antennas may be one or more.

[0287] Optionally, the communication device 600 may specifically be a network device of an embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0288] Optionally, the communication device 600 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0289] Fig.13 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.13 The chip 700 shown includes a processor 710, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0290] Alternatively, if Fig.13 As shown, the chip 700 may further include a memory 720. The processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.

[0291] The memory 720 may be a separate device independent of the processor 710 , or may be integrated into the processor 710 .

[0292] Optionally, the chip 700 may further include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0293] Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0294] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0295] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0296] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0297] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0298] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0299] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0300] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0301] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0302] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0303] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0304] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0305] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0306] The embodiment of the present application also provides a computer program.

[0307] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods in the embodiments of the present application. For the sake of brevity, they are not described here.

[0308] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0309] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0310] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0311] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0312] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0313] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0314] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0315] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method for unlicensed spectrum, characterized in that: include: The terminal equipment monitors the common physical downlink control channel PDCCH of the group; In the case where the group common PDCCH is monitored at the first moment, the terminal device monitors the PDCCH dedicated to the terminal device or the common PDCCH from the second moment, and the second moment is later than the first moment; Between the first moment and the second moment, the terminal device monitors the PDCCH, wherein the manner in which the terminal device monitors the PDCCH between the first moment and the second moment is a first monitoring manner, and the manner in which the terminal device monitors the PDCCH from the second moment onwards is a second monitoring manner, and the first monitoring manner is different from the second monitoring manner, The PDCCH candidates included in a single time unit under the second monitoring mode are a subset of the PDCCH candidates included in a single time unit under the first monitoring mode.

2. The method according to claim 1, characterized in that The first monitoring mode and the second monitoring mode differ in at least one of the following aspects: The period of monitoring PDCCH, the number of PDCCH to be monitored sets included in a single time unit, the number of PDCCH candidates included in the PDCCH to be monitored set, the resource positions of the PDCCH candidates included in the PDCCH to be monitored set, the number of control channel elements CCE included in the PDCCH to be monitored set, the resource positions of the CCE included in the PDCCH to be monitored set, the number of PDCCH candidates included in a single time unit, the resource positions of the PDCCH candidates included in a single time unit, the number of CCE resources included in a single time unit, and the resource positions of the CCE included in a single time unit.

3. The method according to claim 1 or 2, characterized in that: The CCEs included in a single time unit under the second monitoring mode are a subset of the CCEs included in a single time unit under the first monitoring mode.

4. The method according to claim 1 or 2, characterized in that: The PDCCH to-be-monitored set included in a single time unit under the second monitoring mode is at least part of the PDCCH to-be-monitored set included in a single time unit under the first monitoring mode.

5. The method according to claim 2, characterized in that: The single PDCCH to-be-monitored set includes at least one search space set; or, A single PDCCH to-be-monitored set corresponds to at least one control resource set with the same time domain position; or A group of search space sets in a single time unit is divided into at least one PDCCH to-be-monitored set.

6. The method according to claim 1, characterized in that The duration between the first moment and the second moment is preset, configured by a network device, or determined based on the group common PDCCH.

7. A wireless communication method for unlicensed spectrum, characterized in that: include: A network device sends first configuration information to a terminal device, and the first configuration information is used by the terminal device to determine a first monitoring behavior and a second monitoring behavior, wherein the first monitoring behavior is different from the second monitoring behavior; the second monitoring behavior is the behavior of monitoring a PDCCH dedicated to the terminal device or a common PDCCH from a second moment onwards when a group common physical downlink control channel PDCCH is monitored at a first moment, and the second moment is later than the first moment; the first monitoring behavior is the behavior of monitoring the PDCCH between the first moment and the second moment, and the PDCCH candidates included in a single time unit under the second monitoring behavior are a subset of the PDCCH candidates included in a single time unit under the first monitoring behavior.

8. The method according to claim 7, characterized in that The method further comprises: The network device sends second configuration information to the terminal device, where the second configuration information is used to indicate the group of common PDCCHs monitored by the terminal device before the first moment.

9. The method according to claim 7, characterized in that: The first monitoring behavior and the second monitoring behavior differ in at least one of the following aspects: The period of monitoring PDCCH, the number of PDCCH to be monitored sets included in a single time unit, the number of PDCCH candidates included in the PDCCH to be monitored set, the resource positions of the PDCCH candidates included in the PDCCH to be monitored set, the number of CCEs included in the PDCCH to be monitored set, the resource positions of the CCEs included in the PDCCH to be monitored set, the number of PDCCH candidates included in a single time unit, the resource positions of the PDCCH candidates included in a single time unit, the number of CCE resources included in a single time unit, and the resource positions of the CCEs included in a single time unit.

10. The method according to any one of claims 7 to 9, characterized in that The CCEs included in a single time unit under the second monitoring behavior are a subset of the CCEs included in a single time unit under the first monitoring behavior.

11. The method according to any one of claims 7 to 9, characterized in that The PDCCH to-be-monitored set included in a single time unit under the second monitoring behavior is at least part of the PDCCH to-be-monitored set included in a single time unit under the first monitoring behavior.

12. The method according to claim 11, characterized in that The at least part of the PDCCH to-be-monitored set is: the PDCCH to-be-monitored set including the largest number of PDCCH candidates in the PDCCH to-be-monitored set included in a single time unit under the first monitoring behavior.

13. The method according to claim 11, characterized in that The at least part of the PDCCH to-be-monitored set is: the PDCCH to-be-monitored set including the largest number of CCEs in the PDCCH to-be-monitored set included in a single time unit under the first monitoring behavior.

14. The method according to claim 9, characterized in that The single PDCCH to-be-monitored set includes at least one search space set.

15. The method according to claim 9, characterized in that A single PDCCH to-be-monitored set corresponds to at least one control resource set with the same time domain position.

16. The method according to claim 9, characterized in that A group of search space sets in a single time unit is divided into at least one PDCCH to-be-monitored set.

17. A communication device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 6.

18. A communication device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 7 to 16.

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